Universal grinding machine with cnc. CNC machines - grinding. Ukrainian manufacturers of CNC grinding machines

There are a huge number of technological processes, the implementation of which allows you to get a part with the required dimensions, shape and surface quality. For many years, metal processing plants have used special devices called machines. There are several technological processes, among which we note the processing by grinding. Grinding can change the quality of the surface, as well as its shape, by mechanical action. Over the years of development in the field of metal processing, quite a few varieties of equipment have appeared, each of them has a special scheme of work, which is reflected in the drawing.

Purpose of equipment

A grinding machine is a device that is used to process various products made of metal, wood, plastic and other materials. A few decades ago, the equipment was created for processing with low accuracy, technically the design did not allow to bring the dimensions of the parts to high accuracy, but still the characteristics that the grinding machine possesses made it possible to finish.

The grinding machine can be used to solve the following technological problems:

Changes in the shape of the surface of a cylindrical, square and other workpiece. Grinding equipment, depending on the abrasive material, can be used to process various metals, it is possible to remove a relatively small layer of material.
Changes in surface roughness is the main purpose for which the grinding machine was created. The device can remove tens of millimeters of metal or other material.
In some cases, a grinder is used for sharpening. This is due to the fact that the device is used to remove metal, if the cutting edge is correctly positioned, then it is possible to sharpen.

It is almost impossible to achieve results when using hand tools, as if using grinding equipment. Performance is also very high, there are both domestic and industrial versions. The operation of the device requires maintenance, which should also be taken into account.

Classification

As previously noted, there are quite a few drawings and diagrams that produce a grinding machine. This is due to the fact that the shape and dimensions of the parts determine how the processing will be carried out, and what kind of spindle, grinding equipment will have.

By type of installation, the following classification can be made:

Desktop. Modern drawings and diagrams of desktop machines determine that they can be used in everyday life. At the same time, maintenance will not bring many problems, power consumption is negligible, and management is not difficult. However, the desktop version has less performance and functionality.
The modern industrial version has high performance, the scheme and drawings of the model determine that the models have compact overall dimensions. Technically, they are more perfect than those models that were produced in factories in the last millennium.
A grinding machine made in the factories of the Soviet Union is also often found in workshops. Their drawings and diagrams are studied in educational institutions upon receipt of the appropriate qualification. However, the maintenance of such equipment is much more complicated, since the necessary tools and parts are no longer produced.

By purpose, the following groups can be distinguished:

Cylindrical grinding - the most common models that are used for processing cylindrical and conical parts. Such machines are divided into several groups according to the accuracy class. They have been in production since the mid 1990s. Some models were produced for workpieces with high diameter and linear dimensions.
Internal grinding models are less common, but all are often used in metalworking factories. Internal grinding machines can be for domestic and industrial purposes, their performance depends on the equipment and the degree of automation of the processing process. Use internal grinding models to change cylindrical internal surfaces, holes of various shapes. Tooling can change the technical characteristics of an internal grinding machine to a large extent.
The surface grinding group has a scheme that allows you to carry out work to bring the roughness and dimensions of flat and mating surfaces to the desired values. The spindle in this case is located so that the grinder can be used to carry out work associated with a flat surface.
Centerless grinding group for large-scale production. The scheme and drawing, which are characteristic of such a group, cause a simplification of the maintenance process, as well as technical characteristics allow automating the process and increasing productivity.
Honing is the process of bringing the dimensions of a surface to a high degree of accuracy, when the deviation is only a few fractions of a millimeter. The layout of all structural elements, which the grinding machine of this group has, allows processing both cylindrical and flat surfaces. With the help of hand tools, it is impossible to achieve such a result, the control allows you to change the processing characteristics depending on the task.

In this case, cylindrical grinding options can be divided into the following groups:

universal machines - can be used for grinding various cylindrical and conical workpieces, the characteristics of the models can significantly expand the scope. The control of the universal machine can be carried out mechanically or with the help of an automated CNC system;
simple models - grinding equipment that is used for a specific group of workpieces. The scheme and characteristics of simple models determines that only certain groups of parts can be processed when using them. Recently, machines belonging to this group have practically not been produced. This is due to the fact that their purchase is often not justified. Often they are made to order in the organization of mass production.

Considering such a large distribution of cylindrical grinding machines, we will consider the design features. The control of the rotary working table, as well as the characteristic that allows the rotation of the part, determines the versatility of the model. The design scheme has a spindle that can rotate around a vertical axis. Some models have additional headstocks that allow you to change the degree of roughness of holes of various shapes.

Computer numerical control

CNC has been developed over the years in order to increase productivity and simplify the task, to increase the accuracy of the resulting dimensions. The drawings of many parts have dimensions with minimal tolerances; it is impossible to use a hand tool to solve such a problem. Therefore, if the drawings have similar tolerances, a mechanized processing method should be used.

Many problems did not allow the use of numerical control when creating a grinding machine. An example is the lubrication system, as well as the positioning of the spindle. CNC control determines the high-precision positioning of the spindle, automation of the lubrication system.

Despite the huge number of advantages of the CNC system, it is quite difficult to find a design with such automation technology. This is due to the fact that such equipment is used extremely rarely in large-scale and mass production.

The CNC determines the exact positioning of the spindle. However, it should be borne in mind that the spindle must be positioned taking into account the equipment used. Therefore, the drawing indicates what equipment is used for grinding machines.

Maintaining a CNC design is much more difficult, as changes can lead to a malfunction. Adjustment of equipment should be carried out periodically to maintain the accuracy of dimensional changes and the quality of roughness.

There are quite a few varieties of the CNC system, which are divided according to the type of program used to describe the trajectory of the abrasive wheel, describe the spindle speed and feed rate.

Cooling

If lubrication allows to extend the service life of the structure, then cooling significantly increases the service life of the abrasive material. Drawings are created taking into account the fact that during contact with the abrasive material the surface will not heat up, as well as the abrasive material. To do this, the spindle may have a coolant supply system. Household models have a bath of water that will also cool the treatment area.

Maintenance of the cooling system is the need for constant replenishment of the reservoir with coolant.

In conclusion, we note that there are quite a few modern models that have high performance, ease of use, and versatility. Many of them are suitable for domestic and industrial use.

It is quite obvious that for a significant list of parts and entire assemblies there is no alternative to grinding, and is not yet foreseen.

Without doubting that universal grinding machines with manual control in a number of industries will be in demand for a long time, we will turn to more progressive and in line with the spirit of the time machine tools with numerical control. Moreover, serious problems with the training of qualified personnel to work on universal equipment force us to look for new solutions. And, of course, the solution of the main problem - increasing labor productivity is impossible without the introduction of innovative technologies.

About CNC systems for grinding machines

For grinding machines, CNC systems are used from the simplest - single-coordinate to five or six and even eight-coordinate, in machines that work in several circles. The relationship between the operator and the CNC system of the grinding machine is carried out in an interactive mode. The control system uses built-in diagnostic systems that increase the reliability of the machines.

The most common are CNC cylindrical grinding machines, which give the maximum effect when processing multi-stage parts such as spindles, shafts of electric motors, gearboxes, turbines, etc. from one installation. for processing the next shaft neck, for measurement, etc. When processing multi-stage shafts on a CNC cylindrical grinding machine, time is saved by 1.5-2 times compared to manual control.

When creating CNC grinding machines, some technical difficulties arise, which are explained by the following reasons. The grinding process is characterized, on the one hand, by the need to obtain high accuracy and surface quality with minimal size dispersion, on the other hand, by a feature that consists in the rapid loss of dimensional accuracy of the grinding wheel due to its intense wear during operation. In this case, the machine requires mechanisms for automatic compensation of wear of the grinding wheel. The CNC must compensate for deformations of the AIDS system, temperature errors, differences in allowances on workpieces, machine errors when moving along coordinates, etc. Measuring systems must have a high resolution that provides tight tolerances for positioning accuracy. For example, in cylindrical grinding machines, such devices provide a continuous measurement of the diameter of the workpiece during processing.

Almost the entire world production of CNC grinding machines is represented on the Russian market. But let's start with the production of this equipment from the products of domestic enterprises, more precisely, from the products of CIS enterprises.

Manufacturers of grinding machines in the CIS

Currently, in the territory of the former Soviet Union, grinding machines are produced by Russian enterprises - manufacturers of grinding machines:

Voronezh machine-tool plant named after V.I. The 50th anniversary of the Lenin Komsomol produces universal and special grinding machines. These are internal grinding machines of especially high precision models ZK228A and ZK229A, surface grinding machines mod. ZD725, ZL725VF10 with a rectangular table 630x2000 mm in size, designed for grinding flat surfaces with the periphery of the grinding wheel. These are surface grinders mod. ZE756, ZE756L, ZE756L-1 with a retractable round electromagnetic table with a diameter of 800 and 1000 mm and a vertical spindle, designed for high-performance grinding of flat parts with the end face of the grinding wheel. Finally, these are semi-automatic and automatic two-, three- and five-spindle surface grinding machines with round annular tables, designed for grinding the planes of various parts with the end of a grinding wheel in large-scale and mass production.

The Lipetsk Machine Tool Plant manufactures surface grinding machines with a rectangular table - the base model ZL722V and with a round table - the base model ZL741VF10, as well as spare parts for them (electromagnetic plates, spindle assemblies, hydraulic cylinders, etc.).

Derbent plant offers several models of belt polishing machines, suspended peeling and grinding machine, tool sharpening machines, semi-automatic machines for sharpening flat knives with a straight cutting edge, a semi-automatic machine for sharpening frame saws.

Plant jig boring machines Stan-Samara, CJSC produces a number of models of thread grinding machines.

Leningrad machine-tool plant named after Ilyich. The Plant of Precision Machine Tool Building of St. Petersburg ZPS produces a universal circular grinding machine model LZ-269F10.

However, among the machines of these six companies, there is not a single CNC machine.

In the production program of other enterprises, to a greater or lesser extent, there are machine tools equipped with CNC systems. Let's talk about them.

Russian-made CNC grinding machines

Vladimir Machine-Tool Plant Technika manufactures a universal CNC cylindrical grinding machine model KSh3 CNC, as well as a CNC grinding machine for machining SWa AGL-125 CNC rollers.

The machine is made on a modern element base, taking into account the latest trends in machine tool building and has a number of fundamental features that allow it to compare favorably with the base model.

The machine is controlled by the Mikros-12Sh1 CNC system, which allows you to flexibly reconfigure the machine for various technological tasks:

grinding of complex surfaces by copying with wheel dressing with one or two diamonds in two coordinates
grinding of several surfaces according to a given program without the participation of an operator
grinding of eccentric surfaces due to the introduction of a controlled coordinate on the rotation of the part (optional)
maintaining a wide range of travel speeds of the grinding headstock and table, including the minimum ones - up to 0.002 mm/min

The presence of reference linear photopulse converters in two coordinates makes it possible to control linear displacements with an accuracy of 0.1 μm. Purified and dried compressed air is supplied to the transducer housing, which eliminates the possibility of harmful substances entering and increases the reliability of its operation.

The use of two-coordinate synchronous linear electric motors complete with a frequency-controlled drive manufactured by the Belarusian company Ruchservomotor ensures the exclusion of mechanical and hydraulic devices from the feed drive and, accordingly, high dynamics, rigidity, accuracy and reliability due to the elimination of intermediate elements of the classic drive, while reducing the number of necessary snap.

The headstock and grinding head spindles are mounted on hydrodynamic bearings, which ensures an increase in the accuracy of spindle rotation and an increase in the service life of the units. Spindles have the ability to smoothly change the number of revolutions.

The high positioning stability of the actuating units makes it possible to abandon the use of an active control device.

The main technical characteristics are as follows: the largest diameter of the installed product is 200 mm, the largest length of external grinding is 360 mm, the diameter of the hole to be ground is not more than 50 mm, the height of the centers above the table is 125 mm, the distance between the centers is 400 mm, the non-roundness of the sample (d= 35) when processing in fixed centers - 0.2-0.3 microns, the constancy of the diameter of the sample in the longitudinal section over a length of 300 mm -1 microns, the cleanliness of the machined cylindrical surface - Ra 0.04 microns.

The CNC roller grinding machine model AGL125P CNC is designed for high-speed grinding of “barrel-shaped” bearing rollers in serial, large-scale and mass production.

The machine is also controlled by the Mikros-12Sh2 CNC system and has the same design characteristics as the KSh3 CNC machine.

We list the main parameters: the largest outer diameter of the processed workpieces - 180 mm (manual control) or 50 mm (automatic cycle), the smallest - 28 mm; the greatest length of the workpiece - 56 mm, the smallest - 12 mm; the minimum radius of the generatrix of the rollers is 180 mm, the maximum radius is 280 mm.

Moscow Plant of Grinding Machines MSZ-Salut CJSC offers CNC grinding machines:

gear grinding machines MSH395, MSH350S, MSH500S and MSH504S
profile grinding machines model MSH397
special semi-automatic models МШ475, МШ476
internal grinding machine model МШ204

The MSH395 machine is made in an original layout with a horizontal axis of the product, which makes it easy to automate the loading and unloading of products in the future in mass production.

The machine widely uses hydrostatic guides, as well as guides with fluoroplastic coating. The bed and main components are specially designed to ensure high accuracy.

The machine is equipped with a six-axis CNC, providing electronic synchronous communication along three axes simultaneously. The dressing device consists of two sharp-angled diamond rollers.

The special design of the rotation mechanism of the product allows for high-performance power grinding with a worm abrasive wheel, as well as grinding of large-module (module above 6 mm) gears - with a profile wheel.

Gear grinding machines with CNC models MSH350S, MSH500S and MSH504S, working with a flat wheel according to the running method, are designed for processing the involute profile of cutters, shavers and measuring gears.

The machines are equipped with a CNC system from Siemens, which performs the function of dividing and shaping the tooth profile and has stepless regulation of the speed of rotation of the grinding wheel and dressing speed.

The productivity of the machine is increased by equipping with adjustable drives of the main movement and dressing. The introduction of a system for maintaining a constant cutting speed as the grinding wheel wears out is envisaged. The machine is designed for the use of both electrocorundum and elbor circles. The main characteristics of these machines are shown in Table 1.

Profile grinding machines MSH397 (gamma) with CNC and Siemens drives. The MSH397 range of profile grinding machines provides processing of splined shafts and broaches with various real profiles - straight-sided, involute, sharp-slotted, radius, as well as gear wheels.

Flexibility of control provides not only the choice of optimal grinding modes, but also the ability to process broaches with specific features.

The flexible grinding wheel profiling capabilities provided by the CNC controlled dressing mechanism allow simultaneous grinding of sides, inside diameter, roundings and chamfers at the base and top of the spline.

Setting up the units and systems of the machine, which provide the cycle and profile of the grinding wheel, is carried out from the console. Input into the CNC system of data on the product and modes (directly from the drawing or technical card), as well as adjustment based on the results of grinding, are carried out in a dialog mode. It is possible to independently adjust each element of the profile.

High quality of service is ensured by visual diagnostics of input parameters and operation of individual machine systems. It is possible to simulate on the display both the machining cycle and the profile of the grinding wheel.

MSH475, MSH476 with CNC are special semi-automatic machines that work both by the method of plunge and pendulum grinding. Circular grinding machine MSH475 is designed for external grinding of cylindrical (conical) surfaces of bodies of revolution. MSH476 face circular grinding machine - for simultaneous external grinding of diameter and face.

Possible executions of machines:

in hard centers
in mobile centers with a base stop

The MSH204 internal grinding machine is designed for grinding cylindrical and conical outer and inner surfaces of bodies of revolution; it can be produced in the following version:

with automatic loading and unloading of parts
with manual loading and unloading

The machine is equipped with two spindles and allows you to produce:

simultaneous grinding of the hole and end face of the part
sequential grinding of the hole and end face of the part
sequential grinding of all external and internal surfaces

Editing of grinding wheels is carried out along any trajectory specified by the CNC (undercut, bevel, barrel, etc.). The movement of all nodes is carried out from Siemens Simodrive drives. The machine is equipped with CNC system Sinumerik 840D.

CNC grinding machines made in Belarus:

Machine-tool plant Krasny borets Orsha presents CNC grinding machines:

surface grinding with a round table and a horizontal spindle model ОШ-641ФЗ
semi-automatic depth profile grinding ORSHA-630FZ
semi-automatic circular grinding high precision ЗВ130Ф4
semiautomatic profile grinding depth OSH-631FZ
semi-automatic special internal grinding with vertical spindle OSH-642FZ

The OSH-641FZ machine is designed for high-precision processing of both flat surfaces (for example: flat disks) and profiles, which are combinations of segments, straight lines, arcs, circles and other precisely defined curves in a rectangular coordinate system.

The rational design of the bed, column, table and grinding head, made of cast iron, provides high rigidity and vibration resistance of the machines, which guarantees stable accuracy and cleanliness of processing.

The machine is equipped with a Sinumerik-802D CNC system with STEPDRIVE electric drives for controlling the Y and Z coordinates.

The use of high-precision backlash-free rolling ball screws in feed units ensures smooth high-precision backlash-free positioning. All working movements of machines are automated.

There is an electronic handwheel for moving along the Y and Z coordinates with a resolution of 1 µm. The machine uses components from the world's leading manufacturers: Siemens, Baluff, FAG, Rexroth.

The semiautomatic device ORSHA-630FZ is designed for high-performance and high-precision abrasive processing of flat surfaces (thorns, grooves) by deep grinding of various products from hard-to-cut and heat-resistant materials. On the semiautomatic device ORSHA-630FZ, due to the CNC system, it is possible to process complex-profile surfaces.

Design features:

CNC system Sinumerik 840D from Siemens
the presence of mechanisms for contour and continuous dressing of the grinding wheel during the grinding process
highly efficient coolant system with temperature stabilization
hydraulic cleaning of the grinding wheel
effective coolant cleaning with automatic discharge and sludge removal
speed grinding

Components from the world's leading manufacturers were used: SIMODRIVE 611 drives, Hitachi frequency converter; Heidenhain linear converters; Rexroth linear guides, FAG spindle bearings.

Cylindrical semi-automatic machine with CNC ZV130F4 is designed for grinding surfaces of complex profile in transverse and longitudinal sections. Equipped with CNC system Sinumerik 840D. The main characteristics of this machine are shown in Table 2.

The OSH-631FZ semi-automatic machine is designed for processing high-precision two- and three-coordinate profiles using interpolation along two coordinates and programmable movement along the third coordinate by the deep grinding method.

The semi-automatic machine can be used as a flexible processing equipment for dressing and grinding with contour control, and is well suited to the requirements of small and medium batch production with frequently changing workpiece profiles.

Scope of semiautomatic device:

dies and molds - production of complex-profile punches, matrices, forming signs of molds
copiers and templates - easy and precise shaped grinding of copiers and templates
cutting tool - successfully used for the manufacture of various cutter profiles
grooves and tenons - grinding in one pass with a guarantee of high precision and quality
turbine blade locks - due to the high rigidity and power of the main drive, optimal performance is achieved
toothed racks - we guarantee high pitch accuracy, both per pass and in positional grinding

The OSH-642FZ semi-automatic machine is designed for high-precision grinding of external and internal cylindrical surfaces, as well as ends in multi-stage parts such as a body of revolution. The scope of the semiautomatic device is enterprises with large-scale and mass production. The processing of parts on a semi-automatic machine is carried out due to the vertical movement (feed) of the grinding wheel and the circular rotation of the part with oscillation or longitudinal feed. End machining can be carried out by a single-pass depth method with radial feed (stock removal in one pass) or as conventional face grinding with dressing and undercutting of the grinding wheel according to the CNC control program with compensation.

Vitebsk plant of grinding machines Visas produces several models of CNC grinding and grinding machines.

Vitebsk Machine Tool Plant Wistan manufactures cylindrical center and centerless universal and CNC machines.

Ukrainian manufacturers of CNC grinding machines

Company Harvers produces CNC cylindrical grinding machines - semi-automatic models ZM173MVF2, ZM173MVF2.2 and ZM173MVF2.3.

The machines are designed for external grinding of cylindrical and gently sloping conical surfaces by the method of longitudinal and plunge grinding in a semi-automatic cycle in conditions of large-scale and serial production.

The CNC device is used for programmable movement of the grinding head during longitudinal grinding, as well as plunge grinding with an active control device. Unfortunately, there is no information about the CNC system itself.

Semi-automatic machines can be produced adjusted for grinding a specific product.

Factory sanding verst manufactures a high-precision CNC circular grinding semi-automatic machine model ZV130F4, designed for grinding surfaces of complex profiles in transverse and longitudinal sections. The machine is equipped with CNC system Sinumerik 840D.

Main characteristics:

the maximum diameter of the workpiece to be installed in the centers is 300mm, in the chuck - 200mm
maximum length in centers - 1000 mm, in chuck - 250 mm
the largest diameter of the grinding wheel - 500 mm
deviation from roundness when processing in the centers - 1.6 microns
surface finish - Ra 0.16 µm

And that's practically all. Perhaps, something completely new has recently appeared at our enterprises, but there is no official information about this - neither at the latest exhibitions, nor on the websites of companies. Therefore, we have to draw a conclusion, and not a very optimistic one.

CNC grinding machines differ from devices that have manual control in that ensuring the productivity of work on a CNC machine often does not depend on the grinding process itself. It largely depends on the reduction of time spent on metal processing and programmed automatic control of the grinding process.

CNC grinding machines are suitable, as a rule, for the final finishing of surfaces of parts with various abrasives, diamond wheels. This treatment is done by removing the top layers of the metal to give the surfaces the best possible cleanliness.

Such grinding devices perform the following operations:

stripping;
cutting;
cut blanks;
precision machining of rotary surfaces, gear wheels, sharpening of various tools.

About the types of grinders

Typically, CNC systems are installed on devices of this type:

surface grinding for processing ordinary planes;
circular grinding devices for grinding crankshafts;
internal grinding machines for profile grinding of holes;
grinding and grinding, for sharpening tools of machine and manual type, cleaning parts, processing welded or simple structures;
contour grinding;
grinding, for locksmith work, such as chamfering, deburring, sharpening any tools, up to sharpening milling cutters of various types and drills;
centerless grinding types of devices for plunge and continuous through grinding.

About the technical features of some CNC devices

The manufacture of such machines for grinding work can be associated with certain difficulties, which are characterized by such technical factors:

on the one hand, it is necessary to achieve good quality and fairly high accuracy of grinding work, with the smallest dispersion in the size of the circles;
on the other hand, it is necessary to take into account the error in the exact dimensions of the grinding working wheel, depending on its wear.

In such cases, it is required that on such a CNC grinder, there are special mechanisms for automatically compensating for the wear of this tool. Such mechanisms are designed to compensate (compensate):

some deformation;
a small error in the temperature regime;
changes in allowances allowed on workpieces being processed;
any errors of machine tools for given coordinates.

Important. For these types of cylindrical grinding devices, for example, these mechanisms can provide a constant opportunity to measure the size of the workpiece by diameter during its processing. Moreover, the error in the measurement will not exceed more than 2·10 -5 mm. The longitudinal movement of such a table is controlled with an error of only 0.1 mm.

Usually, for the grinding type of devices, special CNC systems are used (from the English CNC), which are controlled by ordinates from 3 to 4. And if several grinding wheels are involved in the machines, then such control will be carried out along 5-6-8 different ordinates. Moreover, the interaction of the operator with the built-in CNC system is often carried out in a dialogue mode using the display. In addition, to increase reliability, such systems are equipped with special diagnostic modules.

About CNC systems

In order to correctly control dressing mechanisms in machine tools, such software systems are used that:

are closed to compensate for temperature deformations and geometric inaccuracies;
have the ability to measure with good resolution, to ensure small tolerances for accurate positioning;
have the ability to automatically compensate for the wear of the circle;
will be able to control the frequency of circular rotation, feed rate.

When controlling such CNC systems, it is possible to coordinate the functioning of multi-axis centerless cylindrical grinding devices. For this, the built-in system uses special modules that calculate:

any trajectory of grinding devices;
necessary corrective actions;
mutually agreed dialogue between the operator and the service device.

Important. The existence of multi-axis CNC systems gives more versatility to these production devices, allows you to effectively influence any grinding process.

About circular grinding devices

In any CNC grinding machine, the greatest effect is achieved when processing surfaces with one installation of special multi-stage parts, for example:

workpiece clamping spindles;
shafts of electric motors;
turbine elements;
reduction gears for rotational frequency control.

In such cases, productivity is greatly improved while reducing overhead time, which is dedicated to:

setting the required blanks and removing already processed finished products;
reinstallation for the purpose of subsequent processing of the shaft neck;
required measurements.

On these circular numerical grinding machines, the programmed processing of various multi-stage shafts reaches the end with a reduction in time of almost 1.5-2 times, when compared with a conventional control machine.

About types of centerless grinders

Machines of this type are usually used for:

processing of various parts, of any length, with large or small diameters;
grinding parts with rather complex external profiles.

These machines usually have high productivity and very precise processing. But, unfortunately, for small-scale and small-scale individual productions, their use is difficult, since it is rather difficult to readjust these devices, since this will require significant time costs, highly qualified service personnel.

Such difficulties are associated with the technological features of these grinding machines, for example:

the existence of leading, grinding grinding wheels in them;
the presence of special ruling devices that provide the necessary configurations for the surfaces of any circles (grinding and leading type);
fixing the fixing of the reference type of special knives;
the presence of mechanisms for compensating the feeds of the desired type of circles, processing products;
setting the required position for loading and unloading types of devices.

About CNC End-Roll Grinders

Usually, in devices controlled by programs, a large number of coordinates are provided. For example, in a grinding fixture of this type, there can be up to 10 controlled ordinates, of which three are main and at least six are auxiliary for better positioning:

axial orientation of workpieces relative to the circle;
displacement of the headstock of the rear type for adjusting and processing workpieces;
editing circles to ensure the possibility of processing any profiles;
device axes for active control;
better turning tables for cone processing.

For processing various types of geometric shapes of products by CNC grinding machines, special programs are installed:

mode selection manager;
a special module that controls the drive;
an interpolator that determines the coordinates of the points.

In serial production, such CNC grinding machines are used using software systems, which makes it possible to flexibly adjust the dressing and grinding cycle, significantly affect the speed of machine changeovers and the processing of a variety of parts. In addition, such multi-coordinate systems give more versatility to machines, stable efficiency in managing all processes.

PURPOSE:

Jig grinding machines are designed for grinding complex shapes and holes, where the highest degrees of machining accuracy are required. According to the principle of operation, these machines are very similar to jig boring machines, but the difference is that grinding machines have a higher processing accuracy (much higher than that of a simple milling or turning machine) and the speed of the grinding spindle.

APPLICATION AREA:

Machine tools are used in tool production, production of dies, dies, production of complex modern mechanisms, wave gearboxes, products requiring particularly high machining accuracy, etc. In the production of these machines, linear drives, high-speed pneumatic or electric motors and various cooling systems are used, both for the machine itself and for the workpiece.

The machine runs at a high spindle speed. Spindles can be changed depending on the requirements of the processing, in order to achieve an optimal result. Some of the spindles are fixed speed (60,000 rpm), others are adjustable (between 30,000 and 50,000 rpm) and still others are very high speed (150,000 rpm). The main spindle has a wide range of speeds to ensure the desired result. The machines have standard movement axes (X and Y). All axes are indexed to 0.0001 mm using an electronic flywheel. The machine is equipped with high-precision linear drives. The spindle rotates at variable speed and moves with an accuracy of 0.0001 mm for grinding high-precision holes. Only the use of such technologies will achieve the desired result with precision processing.

PRODUCTS RECEIVED:

DESIGN FEATURES:

Of the entire JG series of machines, the JG-1010G model stands out in particular. It displays the latest innovations in machine tool building and coordinate grinding in general;
The JG-1010G jig grinder adopts a double-column design with a granite base, which is well known for its excellent vibration-absorbing properties, low thermal conductivity and corrosion resistance, which favorably affects the accuracy of the machine and the roughness of the workpiece;
The rigidity and accuracy of the machine is also affected by the installed direct drives for controlling the X, Y and W coordinates;
Class C1 ball screws are pre-tensioned, which effectively improves rigidity and prevents deformation during operation;
NSK's Japanese Linear Guides of P4 class have high load-bearing capacity. The width of the guides is 45 mm. Installed on three axes - X, Y, Z. They have a large contact area and are less susceptible to deformation. Guides have high rigidity, resistance to vibrations and provide a maximum travel speed of up to 24 m/min;
The Z-axis feed is carried out by a linear motor, which ensures the fast movement of the working tool, rigidity, instantaneous acceleration and no backlash. This not only simplifies the design, but also facilitates fast and precise machining.
In addition, two additional German-made anti-vibration pads installed inside also contribute to the accuracy and quality of processing;
Positioning accuracy ± 0.0015 mm;
Repeatability ± 0.001 mm;
The CNC system and servo drive of the Japanese company FANUC are installed on the machines.

PROCESSING POSSIBILITIES:


Reciprocating grinding

Rolling on a contour with reciprocating motion

Grinding the inner hole

Grinding on the inner contour

Grinding with controlled rotary table (4th axis)

STANDARD EQUIPMENT:

Mini connector S75 x 4;
Mini connector S95 x 4;
Mini connector S125 x 4;
Bolt M12*50L x 4;
Bolt M12*75L x 4;
Bolt M12*100L x 4;
Bolt M12*125L x 4;
Bolt M12*150L x 8;
Nut M12 x 8;
Tool for machine maintenance x 1;
Chuck 12*65L x 4;
Chuck 12*80L x 4;
Chuck 12*100L x 4;
Frame indicator x 2;
Coolant tank x 1;
Electric lubricator x 1;
Cooler x 1;
Grinding tool CBN (cubic boron nitride) x 1;
Headphones x 1;
lighting x 1;
Indicator x 1.

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