Numerical control grinding machine and thread rolling plate polishing machining method

Abstract

The invention provides a numerical control grinding machine and a thread rolling plate polishing method, and relates to the technical field of machine tool machining.The numerical control grinding machine comprises a main machine base, an upper machine frame, a rotary workbench, a polishing part, a Y-axis stroke, a Z-axis stroke and an X-axis stroke, the X-axis stroke is arranged on the main machine base, the Z-axis stroke is arranged on the X-axis stroke, and the upper machine frame is arranged on the upper machine frame; the X-axis stroke is used for controlling the rotating table to move in the X-axis direction of the grinding machine; the numerical control grinding machine comprises three sets of driving parts, each set of driving part is used for driving the X-axis stroke, the Z-axis stroke and the Y-axis stroke, the numerical control grinding machine can conveniently position and fix the thread rolling plate, so that the clamping efficiency of the thread rolling plate is improved, the overall machining time is shortened, and the machining efficiency of the thread rolling plate is improved by continuously and repeatedly polishing and grinding a single thread of the thread rolling plate for three times. The polishing effect on the thread rolling threading die is improved, and the positioning problem caused by follow-up reworking polishing is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool processing, in particular to a numerically controlled grinder and a thread rolling plate polishing processing method. Background Art

[0002] There are many methods for processing mechanical parts in modern mechanical manufacturing. However, all parts with high precision requirements and fine surface roughness requirements generally need to be finally processed on a grinder using the method of fine grinding. In general machine manufacturing, the processing workload undertaken by CNC grinders accounts for 20%-30% of the total machine manufacturing workload. CNC grinders play a major role in the construction of national economic modernization.

[0003] A CNC grinding machine is a device that can perform polishing along the tooth profile of a thread rolling plate. When the existing CNC grinding machines perform polishing on the thread rolling plate, there are problems such as inconvenient positioning of the thread rolling plate and poor polishing effect. Summary of the invention

[0004] The object of the present invention is to provide a CNC grinding machine and a method of using the same, aiming to solve the problems mentioned in the above background technology.

[0005] To achieve the above object, the present invention adopts the following technical solution: the CNC grinding machine comprises:

[0006] Host seat;

[0007] An upper frame, wherein the upper frame is arranged on the main frame;

[0008] A rotary table, the rotary table is used to clamp the thread rolling plate, and the rotary table controls the thread rolling plate to rotate around the rotation center axis of the rotary table;

[0009] A polishing part, which is used to polish the thread rolling plate on the rotary table;

[0010] Y-axis travel, the Y-axis travel is arranged on the upper frame, the polishing part is arranged on the Y-axis travel,

[0011] The polishing part is controlled to move in the Y-axis direction of the grinder through the Y-axis stroke;

[0012] Z-axis travel, the rotary table is arranged on the Z-axis travel, and the Z-axis travel drives the thread rolling plate on the rotary table to move in the Z-axis direction of the grinder;

[0013] X-axis stroke, the X-axis stroke is arranged on the main frame, the Z-axis stroke is arranged on the X-axis stroke, and the X-axis stroke is used to control the rotary table to move in the X-axis direction of the grinder;

[0014] The driving part is provided with three groups, and each group of driving parts is used to drive the X-axis stroke, the Z-axis stroke, and the Y-axis stroke respectively.

[0015] Preferably, a positioning portion is provided on the rotary workbench, and the positioning portion includes a first touch plate and a second touch plate arranged on the rotary workbench, and also includes an "L"-shaped support plate, the support plate includes a bottom edge and a vertical edge arranged perpendicular to each other, a first arc-shaped protrusion is provided on one side of the bottom edge, and a second arc-shaped protrusion and a third protrusion are provided on one side of the vertical edge, the first protrusion, the second protrusion and the third protrusion are equal in size, and also includes an angle adjustment portion, the angle adjustment portion is located between the second protrusion and the second touch plate, the angle adjustment portion includes a plurality of pads, and the angle between the vertical edge and the second touch plate is controlled by controlling the thickness of the angle adjustment portion.

[0016] Preferably, the polishing part includes a first motor, a spindle seat and an adapter plate, the first motor and the spindle seat are respectively located on both sides of the adapter plate, the first motor, the spindle seat and the adapter plate are fixedly connected, a spindle is arranged on the spindle seat, the first motor can drive the spindle to rotate, and a grinding wheel is installed on the spindle.

[0017] Preferably, the driving unit includes a second motor and a synchronous belt, the X-axis stroke, Z-axis stroke and Y-axis stroke respectively have an X-axis ball screw, a Z-axis ball screw and a Y-axis ball screw, and synchronous wheels are respectively provided on the output end of the second motor and the X-axis ball screw, the Z-axis ball screw and the Y-axis ball screw, and the synchronous wheels on the second motor in each group of driving units and the matching synchronous wheels on the X-axis ball screw, the Z-axis ball screw and the Y-axis ball screw are respectively driven by synchronous belts.

[0018] Preferably, the Y-axis stroke includes two Y-axis hard rails symmetrically arranged on the upper frame, the adapter plate is slidably connected to the Y-axis hard rails, and the Y-axis ball screw is arranged on the upper frame and can drive the adapter plate to move in the Y-axis direction of the CNC grinder.

[0019] Preferably, the Z-axis travel includes a sliding frame, the main frame is provided with a Z-axis hard rail slidably connected to the sliding frame, and the Z-axis ball screw is arranged on the main frame and can drive the sliding frame to move on the Z-axis of the CNC grinder.

[0020] Preferably, the X-axis stroke includes a mounting groove, an X-axis hard rail is provided on the sliding frame, the mounting groove is slidably connected to the X-axis hard rail, the X-axis ball screw is provided on the sliding frame and can drive the mounting groove to move on the X-axis of the CNC grinder, a clamping plate is provided on the mounting groove, a T-slot is provided on the clamping plate, and the rotary worktable is installed on the mounting groove through the T-slot on the clamping plate.

[0021] The present invention also provides a thread rolling plate polishing method, comprising the following steps:

[0022] (1) Processability analysis: a set of thread rolling plates is divided into two types: movable thread rolling plates and fixed thread rolling plates. Fill in the data on the operation panel of the CNC grinder according to the part drawing. The data includes the length, width, thickness, left slope length, left slope depth, right slope length, right slope depth, guide angle, thread rolling plate tooth pitch, and thread rolling plate tooth depth of the movable thread rolling plates and the fixed thread rolling plates. Then analyze the structural stiffness and roughness requirements of each surface of the part, determine the clamping surface and processing sequence, and then select the appropriate fixture and grinding wheel tool;

[0023] (2) Write a processing program, write a processing macro program according to the determined processing sequence, and write and save the basic data of the thread rolling plate through a geometric formula calculation formula;

[0024] (3) Technical parameter setting. The specific parameters are as follows: the fast moving speeds of the X-axis travel, Z-axis travel and Y-axis travel of the CNC grinder are 10000 mm / min, 1200 mm / min and 3000 mm / min respectively, the spindle rotation linear speed is 30 M / S, the grinding wheel diameter is between 150 mm and 300 mm, the time required for the X-axis travel, Z-axis travel and Y-axis travel to accelerate from static to 10000 mm / min is 0.05 s, the spindle taper is 1:7, the X-axis travel is 30 to -700 mm, the Z-axis travel is 100 to 400 mm, and the Y-axis travel is -40 to 260 mm;

[0025] (4) Pre-processing debugging: When the grinding wheel is installed on the spindle and the thread rolling plate is not sucked on the rotary table, simulate the movement of the CNC grinder to detect whether the movement of the spindle and the rotary table on the X-axis, Z-axis, and Y-axis meets the requirements, then stop the movement of the spindle and the rotary table, and test the balance of the grinding wheel and the spindle;

[0026] (5) Workpiece positioning: Place the thread rolling plate to be polished on the rotary table, position the thread rolling plate, ensure that the thread rolling plate is parallel to the surface of the rotary table, and then fix the thread rolling plate on the rotary table;

[0027] (6) Workpiece processing: according to the processing sequence determined by the process analysis, the grinding wheel to be used is installed on the spindle, the program is started through the control panel on the CNC grinder, the rotary table is adjusted into position through the X-axis stroke and the Z-axis stroke, the thread rolling plate to be processed is placed under the grinding wheel, the first motor drives the spindle to rotate through the direct coupling, and then according to the set processing program, the grinding wheel is displaced downward under the action of the Y-axis stroke, and the grinding wheel polishes the thread rolling plate to be processed;

[0028] (7) Post-polishing treatment: After polishing, the grinding wheel moves upward under the action of the Y-axis stroke, away from the thread rolling plate. The X-axis stroke and the Z-axis stroke work together to drive the rotary table to move to the outside of the CNC grinder, and move the thread rolling plate to a position that is convenient for removal.

[0029] The beneficial effects of the present invention are:

[0030] 1. This type of CNC grinder can facilitate the positioning and fixing of the thread rolling plate, thereby improving the clamping efficiency of the thread rolling plate and helping to shorten the overall processing time.

[0031] 2. By repeatedly polishing and grinding a single tooth of the thread rolling plate three times in a row, the polishing effect of the thread rolling plate teeth can be improved to avoid positioning problems caused by subsequent rework and polishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention.

[0033] Figure 2 It is a front view of a specific embodiment of the present invention.

[0034] Figure 3 It is a side view of a specific embodiment of the present invention.

[0035] Figure 4 It is a top view of a specific embodiment of the present invention.

[0036] Figure 5 It is a bottom view of a specific embodiment of the present invention.

[0037] Figure 6 It is a structural diagram of the rotary table.

[0038] Figure 7 It is a structural diagram of the spindle seat.

[0039] Figure 8 It is a structural schematic diagram of a specific embodiment of the present invention.

[0040] Fig. 9 This is one of the schematic diagrams of the operation interface.

[0041] Fig.10 This is one of the schematic diagrams of the operation interface.

[0042] In the figure: 1. main machine base; 2. upper frame; 3. rotary worktable; 4. thread rolling plate; 5. first touch plate; 6. second touch plate; 7. support plate; 701, bottom edge; 702, vertical edge; 8. first protrusion; 9. second protrusion; 10. third protrusion; 11. cushion block; 12. first motor; 13. spindle seat; 14. adapter plate; 15. spindle; 16. grinding wheel; 17. second motor; 18. synchronous belt; 19. X-axis ball screw; 20. Z-axis ball screw; 21. Y-axis ball screw; 22. synchronous wheel; 23. Y-axis hard rail; 24. sliding frame; 25. X-axis hard rail; 26. Z-axis hard rail; 27. mounting groove; 28. clamping plate. DETAILED DESCRIPTION

[0043] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0044] like Figure 1-10 As shown, a CNC grinding machine comprises:

[0045] Main seat 1;

[0046] An upper frame 2, wherein the upper frame 2 is arranged on the main frame 1;

[0047] A rotary table 3, wherein the rotary table 3 is used to clamp a thread rolling plate 4, and the rotary table 3 controls the thread rolling plate 4 to rotate around the central axis of rotation of the rotary table 3;

[0048] A polishing part, which is used to polish the thread rolling plate 4 on the rotary table 3;

[0049] Y-axis stroke, the Y-axis stroke is arranged on the upper frame 2, the polishing part is arranged on the Y-axis stroke, and the polishing part is controlled to move in the Y-axis direction of the grinder by the Y-axis stroke;

[0050] Z-axis travel, the rotary table 3 is arranged on the Z-axis travel, and the Z-axis travel drives the thread rolling plate 4 on the rotary table 3 to move in the Z-axis direction of the grinder;

[0051] X-axis stroke, the X-axis stroke is arranged on the main frame 1, the Z-axis stroke is arranged on the X-axis stroke, and the X-axis stroke is used to control the rotary table 3 to move in the X-axis direction of the grinder;

[0052] The driving part is provided with three groups, and each group of driving parts is used to drive the X-axis stroke, the Z-axis stroke, and the Y-axis stroke respectively.

[0053] The rotary table 3 has magnetism after being powered on. When the thread rolling plate 4 is positioned on the rotary table 3 , the rotary table 3 can absorb and fix the thread rolling plate 4 . Since the rotary table 3 is a prior art, its specific structure will not be described in detail.

[0054] Furthermore, a positioning portion is provided on the rotary workbench 3, and the positioning portion includes a first touch panel 5 and a second touch panel 6 arranged on the rotary workbench 3, and also includes an "L"-shaped support plate 7, the support plate 7 includes a bottom edge 701 and a vertical edge 702 arranged perpendicular to each other, a first arc-shaped protrusion 8 is provided on one side of the bottom edge 701, and a second arc-shaped protrusion 9 and a third protrusion 10 are provided on one side of the vertical edge 702, and the first protrusion 8, the second protrusion 9 and the third protrusion 10 are all equal in size, and also includes an angle adjustment portion, the angle adjustment portion is located between the second protrusion 9 and the second touch panel 6, the angle adjustment portion includes a plurality of pads 11, and the angle between the vertical edge 702 and the second touch panel 6 is controlled by controlling the thickness of the angle adjustment portion.

[0055] Furthermore, the polishing part includes a first motor 12, a spindle seat 13 and an adapter plate 14, the first motor 12 and the spindle seat 13 are respectively located on both sides of the adapter plate 14, the first motor 12, the spindle seat 13 and the adapter plate 14 are fixedly connected, a spindle 15 is arranged on the spindle seat 13, the first motor 12 can drive the spindle 15 to rotate, and a grinding wheel 16 is installed on the spindle 15.

[0056] Furthermore, the driving unit includes a second motor 17 and a synchronous belt 18, and the X-axis stroke, Z-axis stroke and Y-axis stroke respectively have an X-axis ball screw 19, a Z-axis ball screw 20, and a Y-axis ball screw 21. The output end of the second motor 17 and the X-axis ball screw 19, the Z-axis ball screw 20, and the Y-axis ball screw 21 are respectively provided with synchronous wheels 22, and the synchronous wheels 22 on the second motor 17 in each group of driving units and the synchronous wheels 22 on the matching X-axis ball screw 19, the Z-axis ball screw 20, and the Y-axis ball screw 21 are respectively transmitted through the synchronous belt 18.

[0057] Furthermore, the Y-axis stroke includes two Y-axis hard rails 23 symmetrically arranged on the upper frame 2, the adapter plate 14 is slidably connected to the Y-axis hard rails 23, and the Y-axis ball screw 21 is arranged on the upper frame 2 and can drive the adapter plate 14 to move in the Y-axis direction of the CNC grinder.

[0058] Furthermore, the Z-axis travel includes a sliding frame 24, and the main frame 1 is provided with a Z-axis hard rail 26 slidably connected to the sliding frame 24. The Z-axis ball screw 20 is arranged on the main frame 1 and can drive the sliding frame 24 to move on the Z axis of the CNC grinder.

[0059] Furthermore, the X-axis stroke includes a mounting groove 27, an X-axis hard rail 25 is provided on the sliding frame 24, the mounting groove 27 is slidably connected to the X-axis hard rail 25, the X-axis ball screw 19 is provided on the sliding frame 24 and can drive the mounting groove 27 to move on the X-axis of the CNC grinder, a clamping plate 28 is provided on the mounting groove 27, a T-slot is opened on the clamping plate 28, and the rotary worktable 3 is installed on the mounting groove 27 through the T-slot on the clamping plate 28.

[0060] The CNC grinding machine uses a new generation control system, and when grinding and polishing the thread rolling plate 4, it includes the following steps:

[0061] (1) Process analysis: a set of thread rolling plates 4 is divided into two types: a movable thread rolling plate 4 (long plate) and a fixed thread rolling plate 4 (short plate). Fill in the data on the operation panel according to the part drawing, such as Fig. 9 and Fig.10 As shown in the figure, (long board length, long board width, long board thickness, short board length, short board width, short board thickness, short board left slope length, short board left slope depth, short board right slope length, short board right slope depth, guide angle, tooth plate tooth distance, tooth plate tooth depth), you can also pre-fill multiple groups of data, select one of the preset multiple groups of data to call according to the drawing;

[0062] Analyze the structural rigidity and roughness requirements of each surface of the part, determine the clamping surface and processing sequence, and then select the appropriate fixture and grinding wheel 16 tool;

[0063] like Figure 6 As shown in , the thickness of the angle adjustment part is a variable, that is, the overall thickness of all the pads 11 will change according to the change of the lead angle of the thread rolling plate 4. Assuming that the length between the two centers of the second protrusion 9 and the third protrusion 10 is L, the lead angle is R, and the thickness of the angle adjustment part is H, then the thickness formula of the angle adjustment part is: H = L*SIN(R). If the length of the two centers of the backing plate 7 is 300mm and the lead angle of the thread rolling plate 4 is 2.5°, the thickness of the angle adjustment part is: 300*SIN(2.5) = 13.0858mm, so the operator only needs to put an angle adjustment part with a thickness of 13.858mm between the second protrusion 9 and the second touch plate 6, and then place the short side and long side of the thread rolling plate 4 against the bottom side 701 and the vertical side 702 of the backing plate 7 respectively;

[0064] The thickness value of the angle adjustment portion is rounded off to two decimal places. The angle adjustment portion is composed of a plurality of pads 11. A plurality of pads 11 of different thicknesses are pre-made, and a plurality of pads 11 of each thickness are also made. For example, the thickness of the pad 11 can be 1.10 mm, 1.11 mm, 1.12 mm, 1.15 mm, 2.10 mm, etc. The angle adjustment portion can be made to reach a predetermined thickness by selecting a plurality of pads 11.

[0065] (2) Write a processing program, write a processing macro program according to the determined processing sequence, and write and save the basic data of the thread rolling plate 4 through a geometric formula calculation formula;

[0066] (3) The technical parameters are set as follows:

[0067] The fast moving speeds of the X-axis travel, Z-axis travel and Y-axis travel of the CNC grinder are 10000mm / min, 1200mm / min and 3000mm / min respectively, the linear speed of the spindle 15 is 30M / S, the diameter of the grinding wheel 16 is between 150mm-300mm, the acceleration of the X-axis travel, Z-axis travel and Y-axis travel from static to 10000mm / min only takes 0.05s, the taper hole of the spindle 15 is 1:7, the X-axis travel is 30~-700mm, the Z-axis travel is 100~400mm, and the Y-axis travel is -40~260mm;

[0068] (4) Debugging before processing: When the grinding wheel 16 is installed on the spindle 15 and the thread rolling plate 4 is not sucked on the rotary table 3, simulate the movement of the CNC grinder to detect whether the movement of the spindle 15 and the rotary table 3 on the X-axis, Z-axis, and Y-axis meets the requirements, and then stop the movement of the spindle 15 and the rotary table 3 to test the balance of the grinding wheel 16 and the spindle 15;

[0069] (5) Workpiece positioning: Place the thread rolling plate 4 to be polished on the rotary table 3, position the thread rolling plate 4, ensure that the thread rolling plate 4 is parallel to the surface of the rotary table 3, and then fix the thread rolling plate 4 on the rotary table 3;

[0070] (6) Workpiece processing: According to the processing sequence determined by the process analysis, the grinding wheel 16 to be used is installed on the spindle 15, and the program is started through the control panel on the CNC grinder. The rotary table 3 is adjusted into position through the X-axis stroke and the Z-axis stroke, and the thread rolling plate 4 to be processed is placed under the grinding wheel 16. The first motor 12 drives the spindle 15 to rotate through the direct coupling. Then, according to the set processing program, the grinding wheel 16 is displaced downward under the action of the Y-axis stroke, and the grinding wheel 16 polishes the thread rolling plate 4 to be processed:

[0071] [1]. First, clamp the thread rolling plate 4 on the rotary table 3;

[0072] [2] Lift the spindle 15 and the grinding wheel 16 to a safe position;

[0073] [3] The grinding wheel 16 rotates clockwise at a linear speed of 30 M / S;

[0074] [4]. The X-axis travel and the Z-axis travel drive the thread rolling plate 4 to quickly move to the starting point of the workpiece, and the grinding wheel 16 moves to the tool setting point driven by the Y-axis travel;

[0075] [5]. The grinding wheel 16 on the spindle 15 quickly runs to the first tooth starting point on the thread rolling plate 4;

[0076] [6] The grinding wheel 16 enters from the first tooth on the left side of the thread rolling plate 4, and drives the thread rolling plate 4 to move through the coordination of the X-axis stroke and the Z-axis stroke, completing the first polishing of the first tooth on the thread rolling plate 4;

[0077] [7]. Then run the X-axis and Z-axis travel in the opposite direction to the starting point of the first tooth and repeat this process three times. The polishing of the first tooth is completed.

[0078] [8] Then the grinding wheel 16 is lifted and retracted through the Y-axis travel;

[0079] [9]. Then the spindle 15 and the grinding wheel 16 are quickly moved to the second tooth starting point of the thread rolling plate 4;

[0080]

[10] . The grinding wheel 16 enters from the second tooth on the left side of the thread rolling plate 4, and moves the thread rolling plate 4 through the coordination of the X-axis stroke and the Z-axis stroke to complete the first polishing of the second tooth;

[0081]

[11] . Then run the X-axis and Z-axis travel in the opposite direction to the starting point of the first tooth and repeat this process three times. The polishing of the second tooth is completed.

[0082]

[12] . Then the grinding wheel 16 is lifted and retracted through the Y-axis travel;

[0083]

[13] . Repeat steps [9] to

[12] until all teeth on the thread rolling plate 4 are polished.

[0084] (7) Post-processing: After processing, the grinding wheel 16 is displaced upward by the Y-axis stroke, away from the thread rolling plate 4. The X-axis stroke and the Z-axis stroke move the worktable to the outside of the CNC grinder. The thread rolling plate 4 on the rotary table 3 is moved to a position on the CNC grinder that is convenient for removal. Most of the debris and impurities above the rotary table 3 are cleaned up with a vacuum cleaner, and the remaining unprocessed debris and impurities are cleaned up with an air gun. The rotary table 3 is cleaned up with a scraper. After the debris and impurities are cleaned up, the CNC grinder needs to be maintained on a daily basis, and the spindle seat 13, the Z-axis hard rail 26, the Z-axis ball screw 20, the X-axis guide rail, the X-axis ball screw 19, the Y-axis guide rail and the Y-axis ball screw 21 are lubricated.

[0085] The CNC grinding machine also includes a double-door protective shell and an operation panel, the operation panel is connected to a control module, the control module is connected to the second motor, the control module includes an X-axis speed adjustment module, a Z-axis speed adjustment module, a Y-axis speed adjustment module, a grinding wheel rotation module, and a circular measurement module, the X-axis speed adjustment module is connected to the X-axis ball screw 19, the Z-axis speed adjustment module is connected to the Z-axis ball screw 20, the Y-axis speed adjustment module is connected to the Y-axis ball screw 21, and the grinding wheel rotation module is connected to the first motor.

[0086] The operation of the X-axis, Z-axis, Y-axis and grinding wheel is controlled by using the X-axis speed adjustment module, the Z-axis speed adjustment module, the Y-axis speed adjustment module, the grinding wheel rotation module and the circular measurement module.

[0087] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A CNC grinding machine, characterized in that it comprises: Host seat; An upper frame, wherein the upper frame is arranged on the main frame; A rotary table, the rotary table is used to clamp the thread rolling plate, and the rotary table controls the thread rolling plate to rotate around the rotation center axis of the rotary table; A polishing part, which is used to polish the thread rolling plate on the rotary table; Y-axis stroke, the Y-axis stroke is arranged on the upper frame, the polishing part is arranged on the Y-axis stroke, and the polishing part is controlled to move in the Y-axis direction of the grinder by the Y-axis stroke; Z-axis travel, the rotary table is arranged on the Z-axis travel, and the Z-axis travel drives the thread rolling plate on the rotary table to move in the Z-axis direction of the grinder; X-axis stroke, the X-axis stroke is arranged on the main frame, the Z-axis stroke is arranged on the X-axis stroke, and the X-axis stroke is used to control the rotary table to move in the X-axis direction of the grinder; The driving part is provided with three groups, and each group of driving parts is used to drive the X-axis stroke, the Z-axis stroke, and the Y-axis stroke respectively.

2. The CNC grinding machine according to claim 1, characterized in that: The rotary workbench is provided with a positioning portion, which includes a first touch panel and a second touch panel arranged on the rotary workbench, and also includes an "L"-shaped support plate, the support plate includes a bottom edge and a vertical edge arranged perpendicular to each other, a first arc-shaped protrusion is arranged on one side of the bottom edge, and a second arc-shaped protrusion and a third protrusion are arranged on one side of the vertical edge, the first protrusion, the second protrusion and the third protrusion are all equal in size, and also includes an angle adjustment portion, the angle adjustment portion is located between the second protrusion and the second touch panel, the angle adjustment portion includes a plurality of pads, and the angle between the vertical edge and the second touch panel is controlled by controlling the thickness of the angle adjustment portion.

3. The CNC grinding machine according to claim 2, characterized in that: The polishing part includes a first motor, a spindle seat and an adapter plate. The first motor and the spindle seat are respectively located on both sides of the adapter plate. The first motor, the spindle seat and the adapter plate are fixedly connected. A spindle is arranged on the spindle seat. The first motor can drive the spindle to rotate. A grinding wheel is installed on the spindle.

4. The CNC grinding machine according to claim 3, characterized in that: The driving unit includes a second motor and a synchronous belt. The X-axis stroke, the Z-axis stroke and the Y-axis stroke respectively have an X-axis ball screw, a Z-axis ball screw and a Y-axis ball screw. Synchronous wheels are respectively arranged on the output end of the second motor and the X-axis ball screw, the Z-axis ball screw and the Y-axis ball screw. The synchronous wheels on the second motor in each group of driving units and the synchronous wheels on the matching X-axis ball screw, the Z-axis ball screw and the Y-axis ball screw are respectively driven by synchronous belts.

5. The CNC grinding machine according to claim 4, characterized in that: The Y-axis travel includes two Y-axis hard rails symmetrically arranged on the upper frame, the adapter plate is slidably connected to the Y-axis hard rails, and the Y-axis ball screw is arranged on the upper frame and can drive the adapter plate to move in the Y-axis direction of the CNC grinder.

6. The CNC grinding machine according to claim 5, characterized in that: The Z-axis travel includes a sliding frame, and a Z-axis hard rail slidably connected to the sliding frame is arranged on the main frame. The Z-axis ball screw is arranged on the main frame and can drive the sliding frame to move on the Z-axis of the CNC grinder.

7. The CNC grinding machine according to claim 6, characterized in that: The X-axis stroke includes a mounting groove, an X-axis hard rail is provided on the sliding frame, the mounting groove is slidably connected to the X-axis hard rail, the X-axis ball screw is provided on the sliding frame and can drive the mounting groove to move on the X-axis of the CNC grinder, a clamping plate is provided on the mounting groove, a T-slot is opened on the clamping plate, and the rotary worktable is installed on the mounting groove through the T-slot on the clamping plate.

8. A method for polishing a thread rolling plate, using a CNC grinding machine as claimed in any one of claims 1 to 7, characterized in that: The steps include: (1) Processability analysis: a set of thread rolling plates is divided into two types: movable thread rolling plates and fixed thread rolling plates. Fill in the data on the operation panel of the CNC grinder according to the part drawing. The data includes the length, width, thickness, left slope length, left slope depth, right slope length, right slope depth, guide angle, thread rolling plate tooth pitch, and thread rolling plate tooth depth of the movable thread rolling plates and the fixed thread rolling plates. Then analyze the structural stiffness and roughness requirements of each surface of the part, determine the clamping surface and processing sequence, and then select the appropriate fixture and grinding wheel tool; (2) Write a processing program, write a processing macro program according to the determined processing sequence, and write and save the basic data of the thread rolling plate through a geometric formula calculation formula; (3) Technical parameter setting. The specific parameters are as follows: the fast moving speeds of the X-axis travel, Z-axis travel and Y-axis travel of the CNC grinder are 10000 mm / min, 1200 mm / min and 3000 mm / min respectively, the spindle rotation linear speed is 30 M / S, the grinding wheel diameter is between 150 mm and 300 mm, the time required for the X-axis travel, Z-axis travel and Y-axis travel to accelerate from static to 10000 mm / min is 0.05 s, the spindle taper is 1:7, the X-axis travel is 30 to -700 mm, the Z-axis travel is 100 to 400 mm, and the Y-axis travel is -40 to 260 mm; (4) Pre-processing debugging: When the grinding wheel is installed on the spindle and the thread rolling plate is not sucked on the rotary table, simulate the movement of the CNC grinder to detect whether the movement of the spindle and the rotary table on the X-axis, Z-axis, and Y-axis meets the requirements, then stop the movement of the spindle and the rotary table, and test the balance of the grinding wheel and the spindle; (5) Workpiece positioning: Place the thread rolling plate to be polished on the rotary table, position the thread rolling plate, ensure that the thread rolling plate is parallel to the surface of the rotary table, and then fix the thread rolling plate on the rotary table; (6) Workpiece processing: according to the processing sequence determined by the process analysis, the grinding wheel to be used is installed on the spindle, the program is started through the control panel on the CNC grinder, the rotary table is adjusted into position through the X-axis stroke and the Z-axis stroke, the thread rolling plate to be processed is placed under the grinding wheel, the first motor drives the spindle to rotate through the direct coupling, and then according to the set processing program, the grinding wheel is displaced downward under the action of the Y-axis stroke, and the grinding wheel polishes the thread rolling plate to be processed; (7) Post-polishing treatment: After polishing, the grinding wheel moves upward under the action of the Y-axis stroke, away from the thread rolling plate. The X-axis stroke and the Z-axis stroke work together to drive the rotary table to move to the outside of the CNC grinder, and move the thread rolling plate to a position that is convenient for removal.

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