CN114473075A - Complex shaping grinding method and machine tool for tooth surface of precision roller enveloping worm - Google Patents

Abstract

The invention relates to a precision roller enveloping toroidal worm tooth surface complex modification grinding method and a machine tool. The toroidal worm tooth surface to be processed is ground and modified by a grinding tool; The toroidal worm shaft motion device to be processed drives the toroidal worm to rotate with the axis of the toroidal worm to be processed as the rotation axis, and the angle between the toroidal worm to be processed and the blade face of the grinding tool is adjusted by the angle adjustment device. The relative position adjusting device adjusts the relative position of the toroidal worm to be processed and the grinding tool, and the grinding tool is driven by the grinding tool grinding driving device to grind the toroidal worm to be processed. The invention improves machining accuracy, machining efficiency, and expands the machining range, and is used for machining the toroidal worm with a larger size range, and can also perform complex modification on the tooth surface of the toroidal worm during machining.

Description

Precision roller enveloping toroidal worm tooth surface complex dressing grinding method and machine tool

technical field

The invention relates to the field of modification grinding, in particular to a complex modification grinding method and a machine tool for the tooth surface of a precision roller enveloping toroidal worm gear.

Background technique

Toroidal worm drive has the advantages of multi-tooth contact, high degree of coincidence, high bearing capacity and long service life. It is the main development direction of the current power worm drive and is widely used in aerospace, ship navigation, mining, metallurgy, coal chemical industry and other fields. However, at present, the machining efficiency of the toroidal worm tooth surface is low, the machining accuracy is not enough, and the machining range is not large enough, which hinders its further promotion and large-scale application.

In terms of the processing method of the toroidal worm, the patent number is CN86107189A, which discloses a processing method of a closed-surface enveloping toroidal worm, which proposes to use a closed-surface grinding wheel to wrap the toroidal worm in a grinding form;

Patent No. CN1248504A discloses an approximate grinding method for a plane enveloping toroidal worm, and proposes a grinding method for grinding a plane enveloping toroidal worm with a large-diameter symmetrical double-cone grinding wheel instead of a plane grinding wheel, which solves the problem of tooth The problem of double-sided grinding of the surface is improved, and the worm grinding efficiency and machining accuracy are improved;

The turning method of the helical surface of the toroidal worm disclosed by the patent number CN101774029A proposes a toroidal worm with a modified tooth top toroidal surface, which is processed with the tooth top toroidal surface without correction, and does not have the function of modifying the tooth surface of the toroidal worm. .

Patent No. CN102275016A discloses a method and equipment for double-sided precision grinding of the enveloping toroidal worm tooth surface. Grinding to improve the machining accuracy and grinding efficiency of the enveloping toroidal worm.

The toroidal worm tooth surface machining method proposed in the above patent improves the machining accuracy of the toroidal worm tooth surface to a certain extent, but there is still room for improvement in the machining efficiency. The function of modifying the tooth surface of the toroidal worm during the process.

In terms of toroidal worm machining machine tools, the commonly used machining methods or machine tools are roughly as follows:

(1) Chinese patent "Special machine tool for processing plane secondary enveloping toroidal worm", application number: 93223232.9. The machine tool is self-modified on the basis of ordinary lathe or gear hobbing machine, which has the advantages of favorable promotion and low cost. Disadvantages such as shape function.

(2) Chinese patent "Multifunctional CNC Toroidal Worm Machine Tool", application number: 01213122.9. It adopts an integral base, a T-shaped split bed, the front end is the front bed for installing the spindle box, the middle is the middle bed for installing the worktable, the rear is the rear bed for installing the tail, and the worm gear pair is installed at the bottom of the worktable. The overall size of the machine tool is reduced, the processing technology is improved, and the machine tool has sufficient strength and rigidity. However, there is also the problem of low precision in machining the toroidal worm, and it cannot process the toroidal worm with a large size range, and it does not have the correct precision. The machined toroidal worm has the function of trimming.

(3) Chinese patent "CNC five-axis linkage plane enveloping toroidal worm gear cutting machine", publication number: CN1493427A. The machine tool has the function of X, Y, Z, A, B five-axis linkage, which controls the cutting edge of the cutter head to move in the space to simulate the inclined plane, so as to envelop the tooth surface of the toroidal worm, and its advantage is that it is in high-speed cutting state. A large number of chips are quickly peeled off, and the efficiency is much higher than that of toroidal worm tooth surface grinding, but there is also the problem of low precision in machining toroidal worms, and it cannot process toroidal worms with a large size range. The function of worm modification.

(4) Chinese patent "Torus worm CNC machine tool with virtual center distance", application number: 200610095040.4. The machine tool can process the toroidal worm with a small center distance and a large center distance, and select different CNC axis linkages to realize turning, milling or grinding of all helical surfaces such as toroidal worms, drum worms, cylindrical worms and tapered worms. , But there is also the problem of low precision of processing toroidal worm, and it does not have the function of modifying the processed toroidal worm.

(5) Chinese patent "CNC five-axis three-linkage plane enveloping toroidal worm whirling cutting machine", publication number CN101362229A. The machine tool has X, Y, Z, A, B five-axis motion, and realizes the linkage function in the X, Y, Z three-axis directions, and uses whirlwind milling to realize the precise forming of the tooth surface of the toroidal worm, and realizes a small toroidal worm. It can improve the production efficiency and reduce the cost of the machine tool and worm, but there is also the problem of low precision machining of the toroidal worm, and it is impossible to process the large-sized toroidal worm, and it does not have the ability to modify the processed toroidal worm. Function.

(6) Chinese patent "Special machine tool for processing primary enveloping, secondary enveloping and conical enveloping toroidal worm", application number: 200910024612.3. The machine tool includes two parts: special equipment and industrial home. It has the function of edge trimming and has a simple structure. It can process the primary envelope, the secondary envelope and the conical envelope toroidal worm respectively. It has a long service life and is suitable for a wide range of occasions. There is also the problem of low machining accuracy, and the toroidal worm cannot be machined with a large size range, and it does not have the function of modifying the machined toroidal worm.

(7) Chinese patent "A Toroidal Worm Machining Machine Tool with On-Line Inspection and Correction Machining Functions", application number: 201410393515.2. The machine tool bed is provided with a spindle unit and a machining unit, as well as a detection unit and a control unit, so as to realize online detection and correction processing in the machining process of the toroidal worm tooth surface, and fundamentally solve the current machining accuracy of the toroidal worm tooth surface. However, it also has the disadvantage of low processing efficiency, and it cannot process toroidal worms with a large size range, and does not have the function of modifying the processed toroidal worms.

(8) Chinese patent "Torus worm turning and grinding compound machine tool based on turning center", application number 201610389670.6. The two processes of turning and grinding the torus worm can be completed in one clamping, avoiding repeated positioning and improving the machining accuracy, but there is still the problem that the processing range is not large enough, and there is no need to modify the processed torus worm. function.

(9) Chinese patent "Double-sided Grinding Machine Tool for Flat Envelope Toroidal Worm Gear Surface Based on Fixed Center of Rotation", application number 201810811354.2. It fundamentally solves the problems of low machining efficiency and low machining accuracy of the current plane enveloping toroidal worm tooth surface, but there is still the problem that the machining range is not large enough, and it does not have the function of modifying the machined toroidal worm.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art, provide a precision roller enveloping toroidal worm tooth surface complex modification grinding method and a machine tool, improve processing accuracy, processing efficiency, expand processing range, and be used for processing larger size range The toroidal worm to be processed can also be modified during processing.

The purpose of this invention is to realize through the following technical solutions:

The precision roller enveloping toroidal worm tooth surface complex dressing grinding method, the toroidal worm to be processed is ground and modified by a grinding tool; The device drives the toroidal worm to be processed to rotate with the axis of the toroidal worm to be processed as the rotation axis, adjusts the angle between the toroidal worm to be processed and the blade face of the grinding tool through the angle adjustment device, and adjusts the to-be-processed through the relative position adjustment device The relative position of the toroidal worm and the grinding tool is driven by the grinding tool grinding drive device to drive the grinding tool to grind the toroidal worm to be processed.

Further, the angle adjustment device drives the toroidal worm to rotate relative to the grinding tool.

Further, the relative position adjusting device adjusts the lateral distance and the longitudinal distance between the toroidal worm to be processed and the grinding tool.

Further, the relative position adjustment device is a grinding tool moving device, and the grinding tool moving device drives the grinding tool to move along the radial and axial directions of the grinding tool, thereby adjusting the relationship between the toroidal worm to be processed and the grinding tool. horizontal and vertical distances.

Further, the grinding tool grinding driving device drives the grinding tool to rotate around the axial direction of the grinding tool to grind the toroidal worm to be processed.

A precision roller enveloping toroidal worm tooth surface complex dressing grinding machine tool, including a bed, on which a main shaft unit, a machining unit, an angle adjustment device and a relative position adjustment device are arranged; the main shaft unit includes a ring to be processed The toroidal worm shaft movement device to be processed drives the toroidal worm to be processed to rotate with the axis of the toroidal worm to be processed as the rotation axis; the processing unit includes a grinding tool and a grinding tool grinding drive The grinding tool grinding drive device drives the grinding tool to grind the toroidal worm to be processed; the angle adjustment device adjusts the angle between the toroidal worm to be processed and the blade face of the grinding tool; the relative The position adjusting device adjusts the relative position of the toroidal worm to be processed and the grinding tool.

Further, the motion device of the toroidal worm shaft to be processed includes a spindle motor, a driving thimble and a tailstock, the spindle motor is connected to the driving thimble, and the toroidal worm to be processed is supported between the driving thimble and the tailstock. The driving thimble drives the toroidal worm to rotate under the action of the spindle motor.

Further, the toroidal worm to be processed and the toroidal worm shaft moving device to be processed are arranged on the workpiece processing table, the angle adjustment device is connected to the workpiece processing table, and the angle adjustment device drives the workpiece processing table to rotate to drive the workpiece processing table to rotate. The toroidal worm rotates relative to the grinding tool.

Further, the relative position adjustment device adjusts the lateral distance and the longitudinal distance between the toroidal worm to be processed and the grinding tool; the relative position adjustment device is a grinding tool moving device, and the grinding tool moving device includes a radial A moving device and an axial moving device, the radial moving device drives the grinding tool to move in the radial direction of the grinding tool, and the axial moving device drives the grinding tool to move along the axial direction of the grinding tool, so as to adjust the to-be-processed The lateral and longitudinal distances between the toroidal worm and the grinding tool.

Further, the grinding tool is arranged on the horizontal support plate of the worktable, and the horizontal support plate of the worktable is connected with an axial moving device, and the axial moving device drives the horizontal support plate of the worktable to move so that the grinding tool can move along the grinding tool. Axial movement of the tool; the axial movement device is arranged on the longitudinal support plate of the worktable, and the longitudinal support plate of the worktable is connected with the radial movement device, and the radial movement device drives the longitudinal support plate of the worktable to move so as to make the grinding The grinding tool moves in the radial direction of the grinding tool.

The beneficial effects of the present invention are:

Through precision roller enveloping toroidal worm tooth surface complex modification grinding method and machine tool, it can improve machining accuracy, machining efficiency, expand machining range, and be used for machining toroidal worm with larger size range. The toroidal worm to be processed is modified during processing.

Description of drawings

Figure 1 is a front view of a precision roller enveloping toroidal worm tooth surface complex grinding machine tool;

Fig. 2 is the top view of the precision roller enveloping toroidal worm tooth surface complex dressing grinding machine tool;

Figure 3 is a left side view of a precision roller enveloping toroidal worm tooth surface complex dressing grinding machine;

Figure 4 shows the motion axis of the precision roller enveloping toroidal worm tooth surface complex dressing grinding machine tool;

FIG. 5 is a schematic diagram of the processing of the present invention.

In the picture:

1- Spindle motor 2- Flange 3- Spindle coupling

4-drive thimble 5-tool mount 6-grinding motor

7- Centering screw 8- Axial motor 9- Toroidal worm to be processed

10-Tailstock ejector pin 11-Tailstock 12-Ejector pin handle

13-correction grinding wheel 14-workpiece processing table 15-angular contact ball bearing

16-Centering motor 17-Transmission gear 18-Second radial thrust ball bearing

19-Second radial deep groove ball bearing 20-Bed bed 21-Workbench horizontal support plate

22-Centering thrust ball bearing 23-Centering deep groove ball bearing 24-Workbench vertical support plate

25-Radial screw 26-First radial thrust ball bearing 27-First radial deep groove ball bearing

28-Radial coupling 29-Radial motor 30-Grinding tool

31-Second axial deep groove ball bearing 32-Second axial thrust ball bearing 33-Axial screw

34-First Axial Thrust Ball Bearing 35-First Axial Deep Groove Ball Bearing 36-Axial Coupling

37-Workpiece processing table pallet 38-Precision indexing worm 39-Precision indexing worm gear

40-Angle adjustment motor

Detailed ways

The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other under the condition of no conflict.

It should be noted that the drawings provided in the following embodiments are only used to illustrate the basic concept of the present invention in a schematic way, so the drawings only show the components related to the present invention rather than the number, shape and number of components in actual implementation. For dimension drawing, the type, quantity and proportion of each component can be changed at will in actual implementation, and the component layout may also be more complicated.

Example 1:

As shown in Figures 1 to 5, the precision roller enveloping toroidal worm tooth surface complex dressing grinding method, the grinding tool 30 is used to grind and modify the toroidal worm 9 to be processed; In the process, the toroidal worm 9 to be processed is driven by the toroidal worm shaft moving device to be processed to rotate with the axis of the toroidal worm 9 to be processed as the rotation axis, and the angle adjustment device is used to adjust the toroidal worm 9 and the grinding tool 30. The angle between the blade faces, the relative position of the toroidal worm 9 to be processed and the grinding tool 30 is adjusted by the relative position adjustment device, and the grinding tool 30 is driven by the grinding tool grinding drive device to grind the toroidal worm 9 to be processed. .

The grinding modification is carried out according to the grinding process program.

The toroidal worm shaft movement device to be processed drives the toroidal worm 9 to be processed to rotate with the axis of the toroidal worm 9 to be processed as the rotation axis,

The axis of the toroidal worm 9 to be machined is called the B axis.

The rotation around the B axis makes the toroidal worm 9 to be machined rotate at a high speed, which is convenient for machining.

The angle adjustment device adjusts the angle between the toroidal worm 9 to be processed and the blade face of the grinding tool 30;

The angle adjustment device drives the toroidal worm 9 to be machined to rotate relative to the grinding tool 30 .

The axis of rotation of the toroidal worm 9 to be machined relative to the grinding tool 30 is called the A axis.

Rotation about the A axis enables the rotation of the toroidal worm 9 to be machined relative to the grinding tool 30 .

Two moving directions of the toroidal worm 9 to be processed are formed by the toroidal worm shaft moving device to be processed and the angle adjustment device, which are the rotation around the B axis and the rotation around the A axis.

The relative position adjusting device adjusts the relative position of the toroidal worm 9 to be processed and the grinding tool 30,

The relative position adjusting device adjusts the lateral distance and the longitudinal distance between the toroidal worm 9 to be processed and the grinding tool 30 .

The relative position adjustment device is a grinding tool 30 moving device, which drives the grinding tool 30 to move along the radial and axial directions of the grinding tool 30, so as to adjust the toroidal worm 9 to be processed and the grinding tool 30. The lateral distance and the longitudinal distance between the cutting tools 30 are determined.

The movement axis of the radial movement of the grinding tool 30 is the X axis, and the grinding tool 30 moves along the X axis so as to move laterally relative to the toroidal worm 9 to be processed.

The axis of movement of the axial movement of the grinding tool 30 is the Z axis, and the grinding tool 30 moves along the Z axis so as to move longitudinally relative to the toroidal worm 9 to be machined.

The movement of the grinding tool 30 along the X and Z axes and the rotation of the toroidal worm 9 to be machined about the A axis replaces the conventional rotation of the grinding tool 30 relative to the virtual center of rotation when machining the toroidal worm 9 .

The grinding tool grinding drive device drives the grinding tool 30 to grind the toroidal worm 9 to be processed.

The grinding tool grinding driving device drives the grinding tool 30 to rotate around the axial direction of the grinding tool 30 (referred to as the Z _c axis) to grind the toroidal worm 9 to be processed.

The grinding tool 30 performs a high-speed rotary motion around the Z _c -axis to grind the toroidal worm 9 to be processed.

Through the axial movement of the grinding tool 30 along the Z-axis, the radial movement of the grinding tool 30 along the X-axis, the self-rotation of the grinding tool 30 around the Z _c -axis, the revolution of the toroidal worm 9 to be machined around the B-axis, and the The rotation of the processing toroidal worm 9 around the A axis realizes five-axis linkage, and the transmission ratio between the toroidal worm 9 to be processed and the grinding tool 30 is controlled according to the grinding process program to modify and grind the toroidal worm 9 to be processed. .

The grinding process program is obtained through the following steps:

S1: measure the toroidal worm 9 to be processed to obtain the basic parameters of the toroidal worm 9 to be processed, and establish the original tooth surface equation of the toroidal worm 9 to be processed according to the basic parameters;

S2: obtain the modified tooth surface equation of the toroidal worm 9 to be processed according to the original tooth surface equation;

According to the relationship between the normal tooth thickness variation and the circumferential rotation amount of the original tooth surface equation of the toroidal worm 9 to be processed, the modified tooth surface equation of the toroidal worm 9 to be processed is obtained

S3: Generate a grinding process program according to the modified tooth surface equation.

According to the basic parameters of the toroidal worm 9 to be machined and the basic parameters of the grinding tool 30 , the rotation center axis A axis, the grinding start point and the grinding end point of the toroidal worm 9 to be machined are determined during grinding. According to the relevant geometric relationship and kinematic relationship, the NC code for grinding is:

G03 X#01 Z#02 A#03 B#04 Zc#05 (1)

In formula (1), #01 is the position vector of the grinding tool 30 along the X-axis direction from the grinding start point to the grinding end point, that is, _Dx shown in FIG. 5 ;

#02 is the position vector of the grinding tool 30 along the _Z -axis direction from the grinding start point to the grinding end point, namely Dz shown in FIG. 5 ;

#03 is the angle that the toroidal worm 9 to be machined rotates around the A axis during the grinding process, which is θ shown in FIG. 5 ;

#04 is the angular displacement of the toroidal worm 9 to be processed around the B axis of the rotation center during the grinding process;

#05 is the angular displacement of the rotation center Zc axis of the grinding tool 30 during the grinding process;

By the NC code shown in formula (1), through the axial movement of the grinding tool 30 along the Z axis, the radial movement of the grinding tool 30 along the X axis, the rotation of the grinding tool 30 around the Z _c axis, the ring to be machined The rotation of the surface worm 9 around the B axis and the rotation of the toroidal worm 9 to be processed around the A axis realize a five-axis linkage; wherein the X axis of the radial movement of the grinding tool 30, the Z axis of the axial movement of the grinding tool 30, The cooperation between the three axes of the A-axis and the rotation of the toroidal worm 9 to be processed controls the attitude of the grinding tool 30 relative to the toroidal worm 9 to be processed, and the rotation speed of the toroidal worm 9 to be processed around the B-axis, thereby controlling The transmission ratio between the tool and the toroidal worm 9 to be processed realizes the modification of the toroidal worm 9 to be processed; finally, the complex grinding of the tooth surface of the roller enveloping toroidal worm is completed.

By rotating the toroidal worm 9 to be processed and the movement of the grinding tool 30 in the axial and radial directions, the transmission ratio between the grinding tool 30 and the toroidal worm 9 to be processed is controlled to complete the complex repair of the tooth surface of the toroidal worm 9 to be processed. Shape grinding.

Before performing the grinding and modification, the toroidal worm 9 to be processed is centered by the centering device moving the toroidal worm 9 or the grinding tool 30 .

When the toroidal worm 9 to be processed is centered, the movement axis of the toroidal worm 9 to be processed or the grinding tool 30 moves is the Y axis, and the toroidal worm 9 to be processed or the grinding tool 30 moves along the Y axis.

The toroidal worm 9 to be processed is processed to obtain a roller enveloping toroidal worm.

A precision roller enveloping toroidal worm tooth surface complex grinding machine tool, including a bed 20, the bed 20 is provided with a spindle unit, a processing unit, an angle adjustment device and a relative position adjustment device; the spindle unit includes The toroidal worm shaft movement device to be processed, the toroidal worm shaft movement device to be processed drives the toroidal worm 9 to be processed to rotate with the axis of the toroidal worm 9 to be processed as the rotation axis; the processing unit includes a grinding tool 30 and The grinding tool grinding driving device drives the grinding tool 30 to grind the toroidal worm 9 to be processed; the angle adjustment device adjusts the distance between the toroidal worm 9 to be processed and the grinding tool 30 The angle between the blade faces; the relative position adjustment device adjusts the relative position of the toroidal worm 9 to be processed and the grinding tool 30 .

The toroidal worm shaft motion device to be processed includes a spindle motor 1, a driving thimble 4 and a tailstock 11. The spindle motor 1 is connected to the driving thimble 4, and the driving thimble 4 and the tailstock 11 hold the ring to be processed. The toroidal worm 9 is driven by the driving thimble 4 under the action of the spindle motor 1 to rotate the toroidal worm 9 to be processed.

The spindle motor 1 is a high-voltage winding spindle motor 1 .

The spindle motor 1 is connected with the drive thimble 4 through the flange 2 and the spindle coupling 3 .

The spindle motor 1 is positioned and fixed on the headstock on the workpiece processing table 14 of the bed 20 through a pair of high-precision angular contact bearings.

The pair of high-precision angular contact bearings are thrust ball bearings and deep groove ball bearings.

The tailstock 11 is provided with a tailstock thimble 10, the toroidal worm 9 to be processed is supported by the driving thimble 4 and the tailstock thimble 10, and the driving thimble 4 drives the toroidal worm 9 to rotate around the B axis.

The tailstock 11 is also provided with a thimble handle 12 , and the thimble handle 12 is used to operate the tailstock thimble 10 .

The toroidal worm shaft moving device to be processed is fixed on the workpiece processing table 14 on the bed 20 .

The workpiece processing table 14 is provided with a correction grinding wheel 13, and the function of the correction grinding wheel 13 is to dress the grinding tool and ensure the processing accuracy.

The grinding tool grinding driving device includes a grinding motor 6, which is connected with a grinding tool 30 through a coupling, and the grinding tool 30 is driven by the grinding motor 6 to grind around The axial direction (Z _c -axis) of the tool 30 is rotated.

The grinding motor 6 is a winding motor.

The grinding tool 30 rotates at high speed around the Z _c -axis to form the main cutting motion.

The grinding tool 30 is a grinding head tool.

The toroidal worm 9 to be processed and the toroidal worm shaft moving device to be processed are arranged on the workpiece processing table 14, the angle adjustment device is connected to the workpiece processing table 14, and the angle adjustment device drives the workpiece processing table 14 to rotate to drive the workpiece processing table 14. The toroidal worm 9 to be machined rotates relative to the grinding tool 30 .

The angle adjustment device includes an angle adjustment motor 40 , a precision indexing worm 38 and a precision indexing worm wheel 39 . In cooperation, the precision indexing worm wheel 39 is connected with the workpiece processing table 14 , and the angle adjustment motor 40 drives the precision indexing worm 38 to drive the precision indexing worm wheel 39 to rotate, thereby driving the toroidal worm 9 on the workpiece processing table 14 to be processed. Rotate relative to the grinding tool 30 . To realize the rotation of the toroidal worm 9 around the A axis.

The angle adjustment motor 40 is a servo motor.

Both ends of the precision indexing worm 38 are positioned on the base of the bed 20 through tapered roller bearings.

Both ends of the precision indexing worm gear 39 are positioned on the base through deep groove ball bearings and thrust ball bearings.

The servo motor is arranged on the base.

The relative position adjusting device adjusts the lateral distance and the longitudinal distance between the toroidal worm 9 to be processed and the grinding tool 30 .

The relative position adjustment device is a grinding tool 30 moving device, the grinding tool 30 moving device includes a radial moving device and an axial moving device, and the radial moving device drives the grinding tool 30 along the direction of the grinding tool 30 . For radial movement, the axial moving device drives the grinding tool 30 to move along the axial direction of the grinding tool 30 , so as to adjust the lateral distance and the longitudinal distance between the toroidal worm 9 to be processed and the grinding tool 30 .

The grinding tool 30 is arranged on the horizontal support plate 21 of the worktable, and the horizontal support plate 21 of the worktable is connected with an axial moving device, and the axial moving device drives the horizontal support plate 21 of the worktable to move so as to make the grinding tool 30 move. Moves along the axial direction of the grinding tool 30; the axial moving device is arranged on the vertical support plate 24 of the worktable, and the vertical support plate 24 of the worktable is connected with a radial moving device, and the radial moving device drives the vertical moving device of the worktable The pallet 24 moves to move the grinding tool 30 in the radial direction of the grinding tool 30 .

The axial moving device includes an axial motor 8 and an axial screw 33. The axial motor 8 is connected with the axial screw 33, and the axial screw 33 is connected with the worktable horizontal support plate 21. The axial motor 8 drives the axial screw 33 to rotate and then drives the horizontal support plate 21 of the worktable to move, so that the grinding tool 30 moves along the axial direction of the grinding tool 30 .

The axial screw 33 is connected to the axial motor 8 on the longitudinal support plate 24 of the worktable through an axial coupling 36 .

One end of the axial screw 33 is installed with the first axial deep groove ball bearing 35 and the first axial thrust ball bearing 34, and the other end is installed with the second axial deep groove ball bearing 31 and the second axial thrust ball bearing 32, so as to locate On the vertical support plate 24 of the worktable, a nut is installed in the middle of the axial screw rod 33 to drive the horizontal support plate 21 of the worktable to move through the guide rail.

The grinding tool 30 is mounted on the horizontal support plate 21 of the worktable through the tool mounting frame 5 .

The axial motor 8 is a servo motor.

The radial moving device includes a radial motor 29 and a radial screw 25. The radial motor 29 is connected to the radial screw 25, and the radial screw 25 is connected to the vertical support plate 24 of the worktable. The radial motor 29 drives the radial screw 25 to rotate, thereby driving the vertical support plate 24 of the worktable to move, so that the grinding tool 30 moves along the radial direction of the grinding tool 30 .

The radial moving device is arranged on the bed 20 .

The radial screw 25 is connected with the radial motor 29 through the radial coupling 28 , and the radial motor 29 is arranged at the front end of the headstock of the bed 20 .

One end of the radial screw 25 is installed with the first radial deep groove ball bearing 27 and the first radial thrust ball bearing 26, and the other end is installed with the second radial deep groove ball bearing 19 and the second radial thrust ball bearing 18, so as to locate On the bed 20 , a nut is installed in the middle of the radial screw 25 to drive the vertical support plate 24 of the worktable to move through the guide rail of the bed 20 .

The radial motor 29 is a servo motor.

The machine bed 20 is also provided with a centering device, which can center the toroidal worm 9 to be processed by moving the toroidal worm 9 or the grinding tool 30 before grinding and reshaping.

The centering device includes a centering motor 16 and a centering screw 7, the centering motor 16 is connected to the centering screw 7, the centering screw 7 is connected to the workpiece processing table 14, and the centering motor 16 is connected to the centering screw 7. 16 drives the centering screw 7 to rotate and then drives the workpiece processing table 14 to move so as to move the toroidal worm 9 on the workpiece processing table 14 to be processed.

The centering screw 7 and the centering motor 16 are connected through two transmission gears 17 and transmit the power of the centering motor 16 to the centering screw 7 , and the centering screw 7 and the transmission gear 17 are positioned through a pair of angular contact ball bearings 15 And fixed on the workpiece processing table support plate 37, the other end is installed with the centering deep groove ball bearing 23 and the centering thrust ball bearing 22 and positioned on the workpiece processing table support plate 37, and the centering screw 7 is installed in the middle of the nut to drive the workpiece processing table. 14 is moved along the Y axis by the guide rail of the bed 20 to realize the centering of the toroidal worm 9 to be processed.

The centering motor 16 is a servo motor.

Through the six-axis motion of A, B, Y, X, Z, and Z _c , the centering is performed by the Y-axis motion before machining, and the remaining A, B, X, Z, and Z _c perform five-axis linkage to complete the toroidal worm to be processed. 9 complex profile grinding.

The grinding tool 30 is a flat-head grinding wheel.

The processing and modification of the tooth surface of the toroidal worm 9 to be processed are realized by the following steps: first, the workpiece processing table 14 is moved along the Y direction by the centering motor 16 to ensure that the position of the toroidal worm 9 to be processed is centered, and then passed through the main shaft. The motor 1, the radial motor 29, the axial motor 8, the grinding motor 6, and the angle adjustment motor 40 perform five-axis linkage, thereby realizing the rotation of the toroidal worm 9 to be processed along the B axis, and the worktable horizontal support plate 21 along the Z axis. In the movement, the table vertical pallet 24 moves along the X axis, the workpiece processing table 14 rotates around the A axis, and the grinding tool 30 rotates around the Z _c axis.

Through the precision roller enveloping toroidal worm tooth surface complex modification grinding method and the machine tool, the machining accuracy, machining efficiency, and the machining range can be improved, and the toroidal worm 9 to be machined with a larger size range can be machined. During machining, the toroidal worm 9 to be machined is modified.

The toroidal worm shaft motion device to be processed drives the toroidal worm 9 to be processed to rotate with the axis of the toroidal worm 9 to be processed as the rotation axis, thereby expanding the processing range; the angle adjustment device and the relative position adjustment device to be processed toroidal worm 9 and grinding The adjustment of the angle and the relative position between the grinding tools 30 realizes the adjustment of the relative posture of the toroidal worm 9 to be processed and the grinding tool 30, and the grinding tool 30 is driven by the grinding tool grinding drive device for grinding. The modification of the toroidal worm 9 to be processed during processing is realized, and the processing accuracy and processing efficiency are improved.

The modification of the tooth surface of the toroidal worm is added to the processing of the tooth surface of the toroidal worm, and the tooth surface is modified by the pre-set grinding process when the tooth surface is processed, which improves the machining and repair of the toroidal worm. shape efficiency. At the same time, by changing the traditional three-axis linkage machining into five-axis linkage machining, the processing efficiency and control accuracy are further improved, and the size range of the toroidal worm that can be processed is also increased. The method has the universality of principle and wide application value.

The above-mentioned embodiments only represent specific embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention.

Claims (10)

1. the precision roller enveloping toroidal worm tooth surface complex modification grinding method is characterized in that: the toroidal worm to be processed is ground and modified by the grinding tool; The machined toroidal worm shaft motion device drives the toroidal worm to be machined to rotate with the axis of the toroidal worm to be machined as the rotation axis, and adjusts the angle between the toroidal worm to be machined and the cutter face of the grinding tool through the relative angle adjustment device. The position adjusting device adjusts the relative position of the toroidal worm to be processed and the grinding tool, and the grinding tool is driven by the grinding tool grinding driving device to grind the toroidal worm to be processed. 2 . The precision roller enveloping toroidal worm tooth surface complex grinding method according to claim 1 , wherein the angle adjustment device drives the toroidal worm to be processed to rotate relative to the grinding tool. 3 . 3. The complex grinding method of precision roller enveloping toroidal worm tooth surface according to claim 1 or 2, characterized in that: the relative position adjusting device adjusts the distance between the toroidal worm to be processed and the grinding tool horizontal and vertical distances. 4. The precision roller enveloping toroidal worm tooth surface complex dressing grinding method according to claim 3, characterized in that: the relative position adjustment device is a grinding tool moving device, and the grinding tool moving device The grinding tool is driven to move in the radial and axial directions of the grinding tool, so as to adjust the lateral distance and the longitudinal distance between the toroidal worm to be processed and the grinding tool. 5. The precision roller enveloping toroidal worm tooth surface complex dressing grinding method according to claim 1 or 2 is characterized in that: the grinding tool grinding drive device drives the grinding tool to surround the axial direction of the grinding tool Rotate to grind the toroidal worm to be machined. 6. A precision roller enveloping toroidal worm tooth surface complex grinding machine tool, characterized in that it comprises a bed, and the bed is provided with a spindle unit, a processing unit, an angle adjustment device and a relative position adjustment device; the The main shaft unit includes a toroidal worm shaft movement device to be processed, and the toroidal worm shaft movement device to be processed drives the toroidal worm to rotate with the axis of the toroidal worm to be processed as a rotation axis; the processing unit includes a grinding tool and A grinding tool grinding driving device, the grinding tool grinding driving device drives the grinding tool to grind the toroidal worm to be processed; the angle adjustment device adjusts the gap between the toroidal worm to be processed and the blade face of the grinding tool The relative position adjusting device adjusts the relative position of the toroidal worm to be processed and the grinding tool. 7. The precision roller enveloping toroidal worm tooth surface complex grinding machine tool according to claim 6, wherein the toroidal worm shaft motion device to be processed comprises a spindle motor, a drive thimble and a tailstock, The spindle motor is connected with the driving thimble, the toroidal worm to be processed is supported between the driving thimble and the tailstock, and the driving thimble drives the toroidal worm to be processed to rotate under the action of the spindle motor. 8. The precision roller enveloping toroidal worm tooth surface complex grinding machine tool according to claim 6 or 7, characterized in that: the toroidal worm to be processed and the toroidal worm shaft moving device to be processed are located in the On the workpiece processing table, the angle adjustment device is connected with the workpiece processing table, and the angle adjustment device drives the workpiece processing table to rotate, thereby driving the toroidal worm to be processed to rotate relative to the grinding tool. 9. The precision roller enveloping toroidal worm tooth surface complex grinding machine according to claim 6 or 7, wherein the relative position adjusting device adjusts the distance between the toroidal worm to be processed and the grinding tool The lateral distance and the longitudinal distance; the relative position adjustment device is a grinding tool moving device, the grinding tool moving device includes a radial moving device and an axial moving device, and the radial moving device drives the grinding tool along the grinding tool. The axial movement device drives the grinding tool to move along the axial direction of the grinding tool, thereby adjusting the lateral distance and the longitudinal distance between the toroidal worm to be processed and the grinding tool. 10. The precision roller enveloping toroidal worm tooth surface complex grinding machine tool according to claim 9, characterized in that: the grinding tool is arranged on the horizontal support plate of the worktable, and the horizontal support of the worktable The plate is connected with an axial moving device, and the axial moving device drives the horizontal support plate of the worktable to move so as to make the grinding tool move along the axial direction of the grinding tool; the axial moving device is arranged on the vertical support plate of the worktable, so The vertical support plate of the worktable is connected with a radial moving device, and the radial moving device drives the vertical support plate of the worktable to move so that the grinding tool moves along the radial direction of the grinding tool.

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