Multi-station numerical control gear grinding machine tool

Abstract

The invention provides a multi-station numerical control gear grinding machine tool which comprises a machine tool body, a rotary indexing table stand column, a sliding table, a mounting base, a rotary shaft and a grinding wheel spindle, quick switching of workpieces can be achieved only through rotation of the rotary indexing table stand column, the distance between the workpiece spindle and the center of the rotary indexing table stand column is shortened by arranging a workpiece containing concave position, and the machining efficiency is improved. And the transmission precision can be improved. The rotating shaft is arranged in the second installation space, the second installation space communicates with the first installation space, a rotating drive of the rotating shaft can be arranged in the first installation space, the overall gravity center of the grinding wheel spindle and the sliding table is located in the sliding table, the stability of the structure can be improved, and then the transmission precision is improved. Therefore, the multi-station numerical control gear grinding machine tool can effectively improve the transmission stability and the transmission precision, so that the machining quality is improved, and the stability of equipment is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of cylindrical gear processing, and specifically relates to a multi-station CNC gear grinding machine tool. Background Art

[0002] At present, with the rapid development of the gear industry, users are in urgent need of high-precision, high-efficiency, large-volume and stable gear grinding products. The changes in the automotive industry in the past two years can be said to be "revolutionary". The rapid development of electric vehicles and their gradual replacement of traditional fuel vehicles are an indisputable fact. The engine speed of traditional fuel vehicles is generally 8000r / min, while the motor speed of electric vehicles can reach up to 28000r / min. The speed changes from relatively low speed to ultra-high speed. Such a change puts particularly strict requirements on the gear accuracy and surface roughness in the gearbox. Therefore, improving gear accuracy and reducing transmission noise are issues that the electric vehicle industry must face.

[0003] CNC gear grinding machines are used for high-speed and precise grinding of spur and helical gears. Their purpose is to correct the deformation of gears after heat treatment, improve the accuracy and finish of tooth surfaces, and achieve the requirements of smooth transmission, reduced noise, and improved accuracy. Existing CNC gear grinding machines have large transmission errors, and when gears mesh, vibrations are generated, which affects the surface roughness of the workpiece. The equipment stability during the grinding and dressing process is poor. Summary of the invention

[0004] The present application aims to solve at least one of the above-mentioned technical problems existing in the prior art. To this end, the present application provides a multi-station CNC gear grinding machine tool, which can improve transmission stability.

[0005] The multi-station CNC gear grinding machine tool according to the embodiment of the present application includes: Bed; A rotary indexing table column, wherein the rotary indexing table column is rotatably arranged on the bed, and a plurality of workpiece spindles are symmetrically arranged on the rotary indexing table column around its own axis, and a workpiece accommodating recess is arranged in the side wall of the rotary indexing table column corresponding to the inner concave of the workpiece spindle, and the outer diameter D of the rotary indexing table column, the axial center distance L between the workpiece spindle and the rotary indexing table column, and the radius R of the workpiece to be processed simultaneously satisfy: D<L<D+R, R<L<D+R; A slide, the slide is movably arranged on the bed along the X-axis direction, the slide can approach or move away from the rotary indexing table column along the X-axis direction, the slide is concavely arranged with a first installation space along the X-axis direction, and a Z-axis column is arranged in the first installation space, the Z-axis column can be raised and lowered along the Z-axis direction, and the Z-axis column is concavely arranged with a second installation space connected to the first installation space along the X-axis direction; A mounting seat, the mounting seat is movably disposed in the second mounting space along a Y-axis direction, wherein the Y-axis direction is perpendicular to the X-axis direction and the Z-axis direction; A rotary shaft, the rotary shaft is rotatably arranged on the mounting seat, and the rotation center of the rotary shaft is parallel to the X-axis direction; A grinding wheel spindle is arranged on a side of the rotary shaft close to the rotary indexing table column, and the grinding wheel spindle is arranged perpendicular to the rotary shaft.

[0006] The multi-station CNC gear grinding machine tool according to the embodiment of the present application has at least the following beneficial effects: The multi-station CNC gear grinding machine tool in the present application is provided with multiple workpiece spindles on the rotary indexing table column, and the workpiece can be quickly switched only by rotating the rotary indexing table column, and the distance from the workpiece spindle to the center of the rotary indexing table column is shortened by providing a workpiece accommodating recess, which can improve the transmission accuracy. The rotary shaft is arranged in the second installation space, and the second installation space is connected to the first installation space, so that the rotary drive of the rotary shaft can be arranged in the first installation space, so that the overall center of gravity of the grinding wheel spindle and the slide is located in the slide, which can improve the stability of the structure and thus improve the transmission accuracy. Therefore, the multi-station CNC gear grinding machine tool in the present application can effectively improve the transmission smoothness and transmission accuracy, thereby improving the processing quality and the stability of the equipment.

[0007] According to some embodiments of the present application, the rotary indexing table column is further provided with a grinding wheel dressing axis, the grinding wheel dressing axis and the workpiece spindle are distributed around the rotary indexing table column, and the grinding wheel dressing axis is horizontally arranged.

[0008] According to some embodiments of the present application, a grinding wheel accommodating recess is provided on the side wall of the rotary indexing table column corresponding to the grinding wheel dressing axis; the multi-station CNC gear grinding machine tool further includes a gear grinding measuring device, and the gear grinding measuring device includes: A measuring needle mechanism, the measuring needle mechanism is rotatably arranged on the spindle housing of the grinding wheel spindle, the measuring needle mechanism has a first state and a second state, in the first state, the measuring head of the measuring needle mechanism is located on a side of the spindle housing close to the rotary indexing table column, in the second state, the measuring head withdraws from the spindle housing close to the rotary indexing table column; A positioning mechanism, the positioning mechanism is arranged on the spindle housing and is used to locate the position of the probe when the measuring needle mechanism is in the first state; A calibration block is arranged in the grinding wheel accommodating recess, and the calibration block is located above the grinding wheel dressing shaft.

[0009] According to some embodiments of the present application, the positioning mechanism includes: A positioning seat, the positioning seat is arranged on the spindle housing; A positioning head, the positioning head is slidably disposed on the positioning seat, the positioning head has a first end protruding from the positioning seat, and the first end can move closer to or farther from the measuring head in the first state during the sliding process; A buffer portion is arranged on a side of the positioning head away from the first end, and is used for elastically supporting the positioning head. The supporting force of the buffer portion on the positioning head can be adjusted.

[0010] According to some embodiments of the present application, the multi-station CNC gear grinding machine tool further includes: The first driving mechanism is arranged between the rotary indexing table column and the bed, and is used to drive the rotary indexing table column to rotate. The first driving mechanism includes a first servo motor, and the first servo motor is engaged with the transmission teeth of the rotary indexing table column.

[0011] According to some embodiments of the present application, a built-in motor is arranged at the bottom of the workpiece spindle, the rotary indexing table column includes a lower column built into the bed and an upper column protruding from the bed, and a rotary bearing is arranged at the upper end of the lower column.

[0012] According to some embodiments of the present application, the multi-station CNC gear grinding machine tool further includes a temperature control device, and the temperature control device includes: A temperature detection module, the temperature detection module is used to detect the temperature of the bed; An oil injection mechanism, the oil injection mechanism is arranged on the bed and is used to supply cooling oil to the bed; A controller is connected to the temperature detection module and the fuel injection mechanism, and is used to obtain the temperature value of the temperature detection module and control the fuel injection mechanism to work when the temperature value is higher than a set value.

[0013] According to some embodiments of the present application, a guide surface is provided at the upper end of the bed, and the guide surface is inclined relative to the horizontal direction. The temperature control device also includes a recovery mechanism arranged at the bottom end of the guide surface.

[0014] According to some embodiments of the present application, the multi-station CNC gear grinding machine also includes a cooling device, which is used to supply cooling oil to the working end of the grinding wheel spindle. The cooling device includes a plurality of nozzles, and the nozzles can be moved and adjusted along the axial and / or radial direction of the grinding wheel spindle.

[0015] According to some embodiments of the present application, the multi-station CNC gear grinding machine also includes a second drive mechanism for driving the slide to move and a third drive mechanism for driving the Z-axis column to rise and fall. The second drive mechanism and the third drive mechanism are both motor screw mechanisms.

[0016] Additional aspects and advantages of the present application will be partially given in the following description, and some of the additional aspects and advantages will become obvious from the following description, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present application is further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 A schematic diagram of the overall structure of this application; Figure 2 A front view of the present application; Figure 3 A top view of the present application; Figure 4 This is a schematic diagram of the installation of the rotary indexing table column in this application; Figure 5 This is a schematic diagram of the distribution of the workpiece spindle in this application; Figure 6 and Figure 7 A schematic diagram of the structure of a gear grinding measuring device; Figure 8 A structural schematic diagram of a positioning mechanism in a gear grinding measuring device; Fig. 9 A schematic diagram of a nozzle configuration in this application. DETAILED DESCRIPTION

[0018] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0019] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0020] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0021] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0022] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0023] Reference Figures 1 to 3 The embodiment of the present application provides a multi-station CNC gear grinding machine tool, comprising: Bed 100; A rotary indexing table column 200 is rotatably arranged on the bed 100. The rotary indexing table column 200 is symmetrically provided with a plurality of workpiece spindles 201 around its own axis. A workpiece accommodating recess is arranged in the side wall of the rotary indexing table column 200 corresponding to the workpiece spindle 201. The outer diameter D of the rotary indexing table column 200, the axial center distance L between the workpiece spindle 201 and the rotary indexing table column 200, and the radius R of the workpiece to be processed all satisfy: D<L<D+R, R<L<D+R; The slide 300 is movably arranged on the bed 100 along the X-axis direction. The slide 300 can approach or move away from the rotary indexing table column 200 along the X-axis direction. The slide 300 is concavely arranged with a first installation space along the X-axis direction, and a Z-axis column 301 is arranged in the first installation space. The Z-axis column 301 can be raised and lowered along the Z-axis direction. The Z-axis column 301 is concavely arranged with a second installation space connected to the first installation space along the X-axis direction; A mounting seat 302, wherein the mounting seat 302 is movably disposed in the second mounting space along a Y-axis direction, wherein the Y-axis direction is perpendicular to the X-axis direction and the Z-axis direction; A rotary shaft, the rotary shaft is rotatably disposed on the mounting seat 302, and the rotation center of the rotary shaft is parallel to the X-axis direction; The grinding wheel spindle 400 is arranged on one side of the rotary axis close to the rotary indexing table column 200, and the grinding wheel spindle 400 is arranged perpendicular to the rotary axis.

[0024] It can be understood that in the multi-station CNC gear grinding machine tool of this embodiment, the workpiece spindle 201 is used to install the gear that needs to be ground, and the grinding wheel spindle 400 is used to install the grinding wheel for gear grinding. During operation, the grinding wheel is controlled to rotate by the grinding wheel spindle 400, lifted and lowered by the Z-axis column 301, moved in the Y-axis direction by the mounting seat 302, swung by the rotary shaft, and moved in the X-axis direction by the slide 300.

[0025] The multi-station CNC gear grinding machine tool in the present application is provided with multiple workpiece spindles 201 on the rotary indexing table column 200, and the workpiece can be quickly switched only by rotating the rotary indexing table column 200. In addition, by providing a workpiece accommodating recess, the distance from the workpiece spindle 201 to the center of the rotary indexing table column 200 is shortened, and the transmission accuracy can be improved. The rotary shaft is arranged in the second installation space, and the second installation space is connected to the first installation space, and the rotary drive of the rotary shaft can be arranged in the first installation space, so that the overall center of gravity of the grinding wheel spindle 400 and the slide 300 is located in the slide 300, which can improve the stability of the structure and further improve the transmission accuracy. Therefore, the multi-station CNC gear grinding machine tool in the present application can effectively improve the transmission smoothness and transmission accuracy, thereby improving the processing quality and the stability of the equipment.

[0026] In some embodiments of the present application, the rotary indexing table column 200 is further provided with a grinding wheel dressing axis 202 , the grinding wheel dressing axis 202 and the workpiece spindle 201 are distributed around the rotary indexing table column 200 , and the grinding wheel dressing axis 202 is horizontally arranged.

[0027] Reference Figure 1 and Figure 5 Specifically, two workpiece spindles 201 are arranged on the rotary indexing table column 200, and the two workpiece spindles 201 are symmetrically distributed at 180° on both sides of the rotary indexing table column 200. The grinding wheel dressing axis 202 is arranged between the two workpiece spindles 201, and forms a 90° central angle with any workpiece spindle 201, so that the rotary indexing table column 200 can be switched from the grinding wheel dressing axis 202 to the workpiece spindle 201 by rotating 90°.

[0028] In this embodiment, the grinding wheel dressing shaft 202 is arranged on the peripheral side of the rotary indexing table column 200, so that the grinding wheel dressing shaft 202 can be moved to the grinding processing position of the original gear to connect with the grinding wheel by rotating the rotary indexing table column 200, thereby improving the switching efficiency, reducing the transmission path, and being beneficial to improving the transmission accuracy, thereby improving the grinding wheel dressing accuracy.

[0029] Reference Figure 1 to Figure 2 Moreover, in this embodiment, the grinding wheel dressing shaft 202 is horizontally arranged, so that when the grinding wheel dressing shaft 202 is rotated to the position of docking the grinding wheel under the control of the rotary indexing table column 200, the grinding wheel can be directly dressed, which reduces the transmission path and can improve the grinding wheel dressing accuracy.

[0030] Reference Figure 1 In some embodiments of the present application, a grinding wheel accommodating recess is provided on the side wall of the rotary indexing table column 200 corresponding to the grinding wheel dressing shaft 202. Through the grinding wheel accommodating recess, the grinding wheel dressing shaft 202 can be as close to the center of the rotary indexing table column 200 as possible, thereby improving the stability of the rotary indexing table column 200.

[0031] Reference Figures 6 to 8 In some embodiments of the present application, the multi-station CNC gear grinding machine tool further includes a gear grinding measuring device 500, and the gear grinding measuring device 500 includes: A measuring needle mechanism, the measuring needle mechanism is rotatably arranged on the spindle housing of the grinding wheel spindle 400, and the measuring needle mechanism has a first state and a second state. In the first state, the measuring head 501 of the measuring needle mechanism is located on a side of the spindle housing close to the rotary indexing table column 200, and in the second state, the measuring head 501 withdraws from the side of the spindle housing close to the rotary indexing table column 200; A positioning mechanism, which is arranged on the spindle housing and is used to position the probe 501 when the measuring needle mechanism is in the first state; The calibration block 502 is disposed in the grinding wheel accommodating recess, and the calibration block 502 is located above the grinding wheel dressing shaft 202 .

[0032] When working, the gear grinding measuring device 500 can use the probe mechanism to rotate to the first state, and use the movement of the spindle box to measure the gear grinding parameters of the gear on the workpiece spindle 201 for online measurement, and rotate to the second state during normal processing to avoid affecting the gear grinding process.

[0033] The calibration block 502 is disposed in the grinding wheel receiving recess, which can avoid affecting the normal gear grinding process and grinding wheel dressing process, and can also be used to calibrate the probe 501. The positioning mechanism can ensure the position accuracy of the probe 501 each time it swings to the first state.

[0034] Reference Figure 8Specifically, in some embodiments of the present application, the positioning mechanism includes: A positioning seat 503, wherein the positioning seat 503 is arranged on the spindle housing; A positioning head 504, the positioning head 504 is slidably disposed on the positioning seat 503, the positioning head 504 has a first end protruding from the positioning seat 503, and the first end can move closer to or farther from the measuring head 501 in the first state during the sliding process; The buffer portion 505 is disposed on a side of the positioning head 504 away from the first end, and is used to elastically support the positioning head 504 . The supporting force of the buffer portion 505 on the positioning head 504 can be adjusted.

[0035] When the stylus mechanism is rotated and adjusted to the first state, it will abut against the positioning head 504, and the buffer part 505 is used to buffer the impact when stopping, so as to ensure the stability of the stylus 501. At the same time, the buffer part 505 can be used to adjust the supporting force to ensure the consistency of the position of the stylus 501 when it stops in the first state each time, so as to ensure the measurement accuracy.

[0036] Specifically, the buffer portion 505 can be configured as a spring, and a bolt or other structure can be used to support the end of the spring away from the positioning head 504, so as to adjust the supporting force.

[0037] Reference Figure 4 In some embodiments of the present application, the multi-station CNC gear grinding machine tool further includes a first driving mechanism, which is disposed between the rotary indexing table column 200 and the bed 100 and is used to drive the rotary indexing table column 200 to rotate. The first driving mechanism includes a first servo motor 203, which is engaged with the transmission teeth of the rotary indexing table column 200. In this embodiment, the first driving mechanism is directly connected to the rotary indexing table column 200, which reduces the transmission path and is conducive to improving the transmission accuracy.

[0038] Reference Figure 4 In some embodiments of the present application, a built-in motor 205 is arranged at the bottom of the workpiece spindle 201, and the rotary indexing table column 200 includes a lower column built into the bed 100 and an upper column protruding from the bed 100, and a rotary bearing 204 is arranged at the upper end of the lower column.

[0039] It can be understood that only the upper end of the workpiece spindle 201 protrudes from the lower column for installing the gear to be processed. By arranging a built-in motor 205 at the bottom for driving, it is beneficial to control the center of gravity on the lower column, which can improve the stability of the rotary indexing table column 200 and thus improve the transmission accuracy.

[0040] At the same time, a slewing bearing 204 is arranged at the upper end of the lower column, which can effectively ensure the rotational installation stability of the slewing indexing table column 200 on the bed 100. The slewing bearing 204 preferably has a high-precision bearing with horizontal and vertical limits.

[0041] In some embodiments of the present application, the multi-station CNC gear grinding machine also includes a second drive mechanism for driving the slide 300 to move, a third drive mechanism for driving the Z-axis column 301 to rise and fall, and a fourth drive mechanism for driving the mounting base 302 to move. The second drive mechanism, the third drive mechanism and the fourth drive mechanism are all motor screw mechanisms.

[0042] In some embodiments of the present application, the multi-station CNC gear grinding machine tool further includes a temperature control device, and the temperature control device includes: A temperature detection module, which is used to detect the temperature of the bed 100; An oil injection mechanism, which is disposed on the bed 100 and is used to supply cooling oil to the bed 100; The controller is connected to the temperature detection module and the fuel injection mechanism, and is used to obtain the temperature value of the temperature detection module and control the fuel injection mechanism to work when the temperature value is higher than the set value.

[0043] As the processing time of the machine tool increases, the temperature will increase, which will cause slight thermal expansion of the bed 100 and other components, affecting the transmission accuracy and further affecting the gear grinding accuracy. In this embodiment, the temperature of the bed 100 can be controlled within a constant range by setting a temperature control device, thereby avoiding thermal expansion, improving transmission accuracy, and further improving processing accuracy.

[0044] Specifically, the oil spraying mechanism is provided with a plurality of spray heads, and the spray heads output cooling oil in a direction in contact with the surface of the bed 100 , so that the cooling oil flows along the surface of the bed 100 without splashing.

[0045] In some embodiments of the present application, a guide surface is provided at the upper end of the bed 100, the guide surface is inclined relative to the horizontal direction, and the temperature control device further includes a recovery mechanism provided at the bottom end of the guide surface. The nozzle is preferably provided at the high end of the guide surface, so that the cooling oil flows quickly from the high end to the bottom end, the temperature of the bed 100 is controlled, and the oil return is also convenient.

[0046] Reference Fig. 9 In some embodiments of the present application, the multi-station CNC gear grinding machine also includes a cooling device, which is used to supply cooling oil to the working end of the grinding wheel spindle 400. The cooling device includes a plurality of nozzles 601, and the nozzles 601 can be moved and adjusted along the axial and / or radial direction of the grinding wheel spindle 400.

[0047] In summary, the multi-station CNC gear grinding machine tool in the present application has higher transmission accuracy, can effectively improve the processing accuracy, and meet the processing requirements of high-precision gears.

[0048] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A multi-station CNC gear grinding machine tool, characterized in that: include: Bed; A rotary indexing table column, wherein the rotary indexing table column is rotatably arranged on the bed, and a plurality of workpiece spindles are symmetrically arranged on the rotary indexing table column around its own axis, and a workpiece accommodating recess is arranged in the side wall of the rotary indexing table column corresponding to the inner concave of the workpiece spindle, and the outer diameter D of the rotary indexing table column, the axial center distance L between the workpiece spindle and the rotary indexing table column, and the radius R of the workpiece to be processed simultaneously satisfy: D<L<D+R, R<L<D+R; A slide, the slide is movably arranged on the bed along the X-axis direction, the slide can approach or move away from the rotary indexing table column along the X-axis direction, the slide is concavely arranged with a first installation space along the X-axis direction, and a Z-axis column is arranged in the first installation space, the Z-axis column can be raised and lowered along the Z-axis direction, and the Z-axis column is concavely arranged with a second installation space connected to the first installation space along the X-axis direction; A mounting seat, the mounting seat is movably disposed in the second mounting space along a Y-axis direction, wherein the Y-axis direction is perpendicular to the X-axis direction and the Z-axis direction; A rotary shaft, the rotary shaft is rotatably arranged on the mounting seat, and the rotation center of the rotary shaft is parallel to the X-axis direction; A grinding wheel spindle is arranged on a side of the rotary shaft close to the rotary indexing table column, and the grinding wheel spindle is arranged perpendicular to the rotary shaft.

2. The multi-station CNC gear grinding machine tool according to claim 1, characterized in that: The rotary indexing table column is also provided with a grinding wheel dressing axis, the grinding wheel dressing axis and the workpiece spindle are distributed around the rotary indexing table column, and the grinding wheel dressing axis is arranged horizontally.

3. The multi-station CNC gear grinding machine tool according to claim 2, characterized in that: The side wall of the rotary indexing table column is provided with a grinding wheel accommodating recess corresponding to the grinding wheel dressing axis; the multi-station CNC gear grinding machine tool also includes a gear grinding measuring device, and the gear grinding measuring device includes: A measuring needle mechanism, the measuring needle mechanism is rotatably arranged on the spindle housing of the grinding wheel spindle, the measuring needle mechanism has a first state and a second state, in the first state, the measuring head of the measuring needle mechanism is located on a side of the spindle housing close to the rotary indexing table column, in the second state, the measuring head withdraws from the spindle housing close to the rotary indexing table column; A positioning mechanism, the positioning mechanism is arranged on the spindle housing and is used to locate the position of the probe when the measuring needle mechanism is in the first state; A calibration block is arranged in the grinding wheel accommodating recess, and the calibration block is located above the grinding wheel dressing shaft.

4. The multi-station CNC gear grinding machine tool according to claim 3, characterized in that: The positioning mechanism comprises: A positioning seat, the positioning seat is arranged on the spindle housing; A positioning head, the positioning head is slidably disposed on the positioning seat, the positioning head has a first end protruding from the positioning seat, and the first end can move closer to or farther from the measuring head in the first state during the sliding process; A buffer portion is arranged on a side of the positioning head away from the first end, and is used for elastically supporting the positioning head. The supporting force of the buffer portion on the positioning head can be adjusted.

5. The multi-station CNC gear grinding machine tool according to claim 1, characterized in that: The multi-station CNC gear grinding machine tool also includes: The first driving mechanism is arranged between the rotary indexing table column and the bed, and is used to drive the rotary indexing table column to rotate. The first driving mechanism includes a first servo motor, and the first servo motor is engaged with the transmission teeth of the rotary indexing table column.

6. The multi-station CNC gear grinding machine tool according to claim 1, characterized in that: A built-in motor is arranged at the bottom of the workpiece spindle, and the rotary indexing table column comprises a lower column built in the bed and an upper column protruding from the bed, and a rotary bearing is arranged at the upper end of the lower column.

7. The multi-station CNC gear grinding machine tool according to claim 1, characterized in that: The multi-station CNC gear grinding machine tool also includes a temperature control device, which includes: A temperature detection module, the temperature detection module is used to detect the temperature of the bed; An oil injection mechanism, the oil injection mechanism is arranged on the bed and is used to supply cooling oil to the bed; A controller is connected to the temperature detection module and the fuel injection mechanism, and is used to obtain the temperature value of the temperature detection module and control the fuel injection mechanism to work when the temperature value is higher than a set value.

8. The multi-station CNC gear grinding machine tool according to claim 7, characterized in that: The upper end of the bed is provided with a guide surface, and the guide surface is arranged to be inclined relative to the horizontal direction. The temperature control device also includes a recovery mechanism arranged at the bottom end of the guide surface.

9. The multi-station CNC gear grinding machine tool according to claim 1, characterized in that: The multi-station CNC gear grinding machine also includes a cooling device, which is used to supply cooling oil to the working end of the grinding wheel spindle. The cooling device includes a plurality of nozzles, and the nozzles can be moved and adjusted along the axial and / or radial directions of the grinding wheel spindle.

10. The multi-station CNC gear grinding machine tool according to claim 1, characterized in that: The multi-station CNC gear grinding machine also includes a second driving mechanism for driving the slide to move and a third driving mechanism for driving the Z-axis column to rise and fall. The second driving mechanism and the third driving mechanism are both motor screw mechanisms.

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