Numerically controlled grinding machine with automatic compensation

Abstract

The application relates to the technical field of numerical control grinding machines, in particular to a numerical control grinding machine with an automatic compensation device, which comprises a machine tool main body, a grinding head assembly capable of moving horizontally is installed on the machine tool main body, a drill rod capable of moving longitudinally is installed at the top end of the grinding head assembly, a clamping assembly is slidably connected to one side of the top surface of the machine tool main body, a compensation mechanism is fixedly installed on the other side of the top surface of the machine tool main body, the compensation mechanism comprises a stand, and a piston pipe is arranged on one side of the clamping assembly. In the application, the wear distance of the outer diameter of the grinding wheel is compensated by moving the clamping assembly, that is, when the outer diameter of the grinding wheel is worn by one unit distance, the clamping assembly is moved left by one unit distance through the compensation mechanism, so that the grinding wheel can normally contact and polish the workpiece on the clamping assembly without changing the moving parameters of the grinding head assembly, the parameter adjustment caused by the wear of the grinding wheel is reduced, and the use is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of numerical control grinding machine, and particularly relates to a numerical control grinding machine with automatic compensation device. BACKGROUND

[0002] The numerical control grinding machine is a machine tool for grinding workpiece surface through numerical control technology, and most of the grinding machines use high-speed rotating grinding wheel for grinding, and a few use oilstone, abrasive belt and other grinding tools and free abrasive for processing. The grinding end of the numerical control grinding machine adjusts the position of the grinding wheel through longitudinal and transverse movement to grind the workpiece on the clamping end.

[0003] The movement parameters of the grinding end of the numerical control grinding machine are generally set in advance. When the outer diameter of the grinding wheel is reduced due to wear, the grinding depth of the grinding wheel will deviate under the predetermined travel distance. Therefore, the outer diameter of the grinding wheel needs to be re-corrected after a period of work, so as to adjust the movement parameters of the grinding end or replace the grinding wheel. It is troublesome. Therefore, the present application provides a numerical control grinding machine with automatic compensation device which can compensate the wear distance of the outer diameter of the grinding wheel. SUMMARY

[0004] In order to overcome the above technical problems, the purpose of the present application is to provide a numerical control grinding machine with automatic compensation device. The wear distance of the outer diameter of the grinding wheel is compensated by moving the clamping assembly. That is, when the outer diameter of the grinding wheel is worn by one unit distance, the clamping assembly is moved left by one unit distance through the compensation mechanism, so that the grinding wheel can normally contact and grind the workpiece on the clamping assembly without changing the movement parameters of the grinding head assembly, reducing the parameter adjustment caused by the wear of the grinding wheel, and facilitating use.

[0005] The purpose of the present application can be achieved by the following technical solutions:

[0006] The numerical control grinding machine with automatic compensation device, including machine tool main part, the machine tool main part is installed with the grinding head assembly that can move laterally, the grinding head assembly top end is installed with the drill rod that can move longitudinally, the top surface one side of machine tool main part is slidably connected with clamping assembly, the top surface other side of machine tool main part is fixedly installed with compensation mechanism, the compensation mechanism includes stand, one side of clamping assembly is provided with piston pipe, one end of piston pipe is fixedly connected with the top surface of machine tool main part, the other end inner wall of piston pipe is slidably connected with piston rod one, one end of piston rod one is fixedly connected with clamping assembly, the both ends position of one side wall of piston pipe and clamping assembly are fixedly connected with extrusion spring one, the bottom end of stand is fixedly connected with the top surface of machine tool main part, the top end of stand is fixedly connected with drive module, the drive module is provided with reversing module, the top end of stand is fixedly connected with closed pipe on one side of reversing module, the one end inner wall of closed pipe is slidably connected with piston rod two, one end of drill rod is installed with grinding wheel, piston rod two is used for contact with grinding wheel, the other end of closed pipe is fixedly connected with one-way valve group, the one-way valve group is communicated with pipeline between one end and the other end of piston pipe, and liquid is added between the other end of closed pipe and one end of piston pipe, the wear distance of the outer diameter of grinding wheel is compensated by the movement of clamping assembly, that is, when the outer diameter of grinding wheel wears a unit distance, the clamping assembly is moved left by a unit distance through the compensation mechanism, so that the grinding wheel can normally contact and polish the workpiece on the clamping assembly without changing the movement parameters of the grinding head assembly, reducing the parameter adjustment caused by the wear of the grinding wheel, and facilitating use.

[0007] Further, the inner wall of the closed pipe is fixedly connected with a partition plate, the inner part of the closed pipe is divided into cavity one and cavity two by the partition plate, one side wall of the closed pipe is drivingly connected with a rotating rod, one end of the rotating rod is drivingly connected with the reversing module, one side wall of the partition plate is fixedly connected with a connecting sleeve, one side wall of the connecting sleeve is provided with a connecting port, the other end of the rotating rod is fixedly connected with a closing block on the outer side wall, when the closing block is aligned with the connecting port, the closing block blocks the connecting port, so that the cavity one and the cavity two are isolated, thereby avoiding the liquid flow between the cavity one and the cavity two, and avoiding the left movement of the piston rod two and the piston rod one.

[0008] Further, the one-way valve group includes a valve pipe, one end of the valve pipe is fixedly communicated with the other end of the closed pipe, the other end of the valve pipe is communicated with the pipeline, a valve ball is movably arranged inside the valve pipe, the valve ball and the other end inner wall of the valve pipe are fixedly connected with an extrusion spring three, avoiding the liquid in the pipeline from flowing back into the closed pipe, and facilitating the positioning of the piston rod one.

[0009] Further, the other end of the closed pipe is slidably connected with a top rod, the other end of the top rod is fixedly sleeved with an eccentric wheel, and the top rod moves left under the drive of the eccentric wheel, so that the valve ball is opened leftwards, and the piston rod is contacted with the grinding wheel again.

[0010] Further, the driving module comprises a sliding rail, the sliding rail is fixed at the top end of the stand, the inner wall of the sliding rail is slidably connected with a sliding rod, the top surface of the sliding rod is fixedly connected with the reversing module, and the one end of the sliding rod is fixedly connected with a push plate.

[0011] Further, the outer wall of the one side of the sliding rail is fixedly connected with a ring, the inner wall of the one end of the ring is slidably sleeved with a limiting rod, the one end of the limiting rod is fixedly connected with the push plate, the outer wall of the one end of the limiting rod is fixedly connected with a reset spring between the ring, the other end of the limiting rod is fixedly connected with a limiting block, and the limiting block is used for avoiding the disconnection between the limiting rod and the ring.

[0012] Further, the reversing module comprises a frame, the outer walls of the two ends of the frame are fixedly connected with the top surface of the sliding rod, the one end of the rotating rod is fixedly sleeved with a ratchet gear, the one side of the bottom surface of the frame is provided with a ratchet plate one, the one side of the inner top surface of the frame is provided with a ratchet plate two, the outer walls of the two ends of the ratchet plate one and the ratchet plate two are fixedly connected with round rods, the one end of the round rod is slidably inserted into the frame, and the outer wall of the round rod is slidably sleeved with an extrusion spring two.

[0013] Further, the ratchets on the ratchet plate one and the ratchet plate two are towards the same direction, the small ends of the ratchets on the ratchet plate one are towards the one side close to the push plate, the ratchet plate one drives the rotating rod to rotate when moving leftwards, and the ratchet plate two drives the rotating rod to rotate when moving rightwards.

[0014] Further, the connecting port is located on the outer wall of the connecting sleeve, close to the one side of the one end of the closed pipe and the lower position, so that the connecting port is dislocated with the closed block before the eccentric wheel contacts with the top rod.

[0015] Further, the one end of the top rod is hollow, and the one end of the top rod does not close the closed pipe, so as to avoid affecting the flow between the cavity one and the valve pipe.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. The outer diameter wear distance of the grinding wheel is compensated by the movement of the clamping assembly, that is, when the outer diameter of the grinding wheel wears a unit distance, the clamping assembly moves left by a unit distance through the compensation mechanism, so that the grinding wheel can normally contact and polish the workpiece on the clamping assembly without changing the movement parameters of the grinding head assembly, reducing the parameter adjustment caused by the wear of the grinding wheel, and facilitating use;

[0018] 2. Through the setting of the compensation mechanism, when the drill rod moves left, the cavity one and the cavity two are restored to communicate, the valve ball is opened by the top rod, the piston rod two moves right under the hydraulic pressure and abuts against the left moving grinding wheel, the grinding wheel pushes the piston rod two to move left, the clamping assembly moves right, the smaller the outer diameter of the grinding wheel, the smaller the left moving distance of the piston rod two, and the smaller the right moving distance of the clamping assembly, so that the grinding wheel wear part is compensated, and the clamping assembly is automatically limited, the operation is reduced, and the use is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0019] The application will be further described below with reference to the drawings.

[0020] Figure 1 is the overall structure schematic diagram of the application;

[0021] Figure 2 is the overall top view structure schematic diagram of the application;

[0022] Figure 3 is the compensation mechanism structure schematic diagram of the application;

[0023] Figure 4 is the internal structure schematic diagram of the closed pipe of the application;

[0024] Figure 5 is the partition plate position schematic diagram of the application;

[0025] Figure 6 is the internal top view structure schematic diagram of the closed pipe of the application;

[0026] Figure 7 is the top rod structure schematic diagram of the application;

[0027] Figure 8 is the partition plate structure schematic diagram of the application;

[0028] Figure 9 is the reversing module structure schematic diagram of the application.

[0029] In the figure: 100, machine tool main body; 110, grinding head assembly; 111, drill rod; 112, grinding wheel; 120, clamping assembly; 130, extrusion spring one; 200, compensation mechanism; 210, piston tube; 211, piston rod one; 220, stand; 230, driving module; 231, slide rail; 232, slide rod; 233, ring piece; 234, limiting rod; 235, return spring; 240, reversing module; 241, frame; 242, ratchet plate one; 243, ratchet plate two; 244, ratchet gear; 245, round rod; 246, extrusion spring two; 250, closed tube; 251, piston rod two; 252, cavity one; 253, cavity two; 260, one-way valve group; 261, valve tube; 262, extrusion spring three; 263, valve ball; 264, jacking rod; 270, partition; 271, connecting sleeve; 272, connecting port; 280, rotating rod; 281, eccentric wheel; 282, closing block. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without any creative work, fall within the protection scope of the present application.

[0031] Please refer to Figures 1-9The embodiment shows a numerical control grinding machine with automatic compensation device, including machine tool body 100, the machine tool body 100 is installed with the grinding head assembly 110 that can move laterally, the grinding head assembly 110 top end is installed with the drill rod 111 that can move longitudinally, the top surface one side of machine tool body 100 is slidably connected with clamping assembly 120, the top surface other side of machine tool body 100 is fixedly installed with compensation mechanism 200, and the compensation mechanism 200 includes stand 220, one side of clamping assembly 120 is provided with piston tube 210, one end of piston tube 210 is fixedly connected with the top surface of machine tool body 100, the other end inner wall of piston tube 210 is slidably connected with piston rod one 211, and one end of piston rod one 211 is fixedly connected with clamping assembly 120, and the both ends position of the side wall of piston tube 210 is fixedly connected with extrusion spring one 130 between clamping assembly 120, the bottom end of stand 220 is fixedly connected with the top surface of machine tool body 100, the top end of stand 220 is fixedly connected with drive module 230, drive module 230 is provided with reversing module 240, the top end of stand 220 is fixedly connected with closed tube 250 on one side of reversing module 240, the inner wall of one end of closed tube 250 is slidably connected with piston rod two 251, one end of drill rod 111 is installed with grinding wheel 112, piston rod two 251 is used to contact with grinding wheel 112, the other end of closed tube 250 is fixedly connected with one-way valve group 260, and the one-way valve group 260 is communicated with the one end of piston tube 210 between one end, and the other end of closed tube 250 and the one end of piston tube 210 are added with liquid, the wear distance of the outer diameter of grinding wheel 112 is compensated by the movement of clamping assembly 120, i.e. when the outer diameter of grinding wheel 112 wears a unit distance, clamping assembly 120 is moved left by a unit distance by compensation mechanism 200, so that grinding wheel 112 can be normally contacted with workpiece on clamping assembly 120 and polished without changing the movement parameters of grinding head assembly 110, reduce the parameter adjustment caused by the wear of grinding wheel 112, and facilitate use.

[0032] The inner wall of the closed pipe 250 is fixedly connected with a partition plate 270, the partition plate 270 divides the inside of the closed pipe 250 into cavities one 252 and two 253, one side wall of the closed pipe 250 is in transmission connection with a rotating rod 280, one end of the rotating rod 280 is in transmission connection with the reversing module 240, one side wall of the partition plate 270 is fixedly connected with a connecting sleeve 271, the connecting sleeve 271 is provided with a connecting port 272 on one side wall, the other end of the rotating rod 280 is fixedly connected with a closing block 282 on the outer side wall, when the closing block 282 is aligned with the connecting port 272, the closing block 282 blocks the connecting port 272, so that the cavities one 252 and two 253 are isolated, thereby avoiding the liquid flowing between the cavities one 252 and two 253, so as to avoid the left movement of the piston rod two 251 and the piston rod one 211, the one-way valve group 260 comprises a valve pipe 261, one end of the valve pipe 261 is fixedly communicated with the other end of the closed pipe 250, the other end of the valve pipe 261 is communicated with a pipeline, the valve pipe 261 is movably provided with a valve ball 263 inside, the valve ball 263 is fixedly connected with an extrusion spring three 262 between the other end of the valve pipe 261 and the inner wall, so as to avoid the liquid in the pipeline flowing back into the closed pipe 250, thereby facilitating the limiting of the piston rod one 211.

[0033] The other end of the closed pipe 250 is slidably connected with a jacking rod 264 between the inner walls, the other end of the rotating rod 280 is fixedly sleeved with an eccentric wheel 281, when the rotating rod 280 rotates, the jacking rod 264 is driven to move left by the eccentric wheel 281, so that the jacking rod 264 moves left to open the valve ball 263, so that the piston rod two 251 is reset to be in contact with the grinding wheel 112 again, the driving module 230 comprises a sliding rail 231, the sliding rail 231 is fixed on the top end of the stand 220, the inner wall of the sliding rail 231 is slidably connected with a sliding rod 232, the top surface of the sliding rod 232 is fixedly connected with the reversing module 240, one end of the sliding rod 232 is fixedly connected with a push plate 111, when the push plate 111 moves left, the sliding rod 232 is driven to move left by the push plate.

[0034] One side outer wall of the sliding rail 231 is fixedly connected with a ring 233, an inner wall of one end of the ring 233 is slidably sleeved with a limiting rod 234, one end of the limiting rod 234 is fixedly connected with the push plate, a return spring 235 is fixedly connected between the outer side wall of one end of the limiting rod 234 and the ring 233, the other end of the limiting rod 234 is fixedly connected with a limiting block, the limiting block is used for avoiding disengagement of the limiting rod 234 from the ring 233, facilitating the sliding rod 232 to stop after moving right a certain distance under the elastic force of the return spring 235, the reversing module 240 comprises a frame 241, outer side walls of two ends of the frame 241 are fixedly connected with the top surface of the sliding rod 232, one end of the rotating rod 280 is fixedly sleeved with a ratchet gear 244, one side wall of the bottom surface of the frame 241 is provided with a ratchet plate one 242, one side of the inner top surface of the frame 241 is provided with a ratchet plate two 243, outer side walls of both ends of the ratchet plate one 242 and the ratchet plate two 243 are fixedly connected with round rods 245, one end of the round rod 245 is slidably inserted into the frame 241, the outer side wall of the round rod 245 is slidably sleeved with a pressing spring two 246, so that the frame 241 reciprocatingly moves, and the rotating rod 280 is driven to rotate in one direction through the ratchet gear 244.

[0035] The ratchets on the ratchet plate one 242 and the ratchet plate two 243 are towards the same direction, and small ends of the ratchets on the ratchet plate one 242 are all towards one side close to the push plate, so that the ratchet plate one 242 drives the rotating rod 280 to rotate when moving left, and the ratchet plate two 243 drives the rotating rod 280 to rotate when moving right, the connecting port 272 is located on the outer side wall of the connecting sleeve 271, close to one side of one end of the closed pipe 250 and at a lower position, facilitating the connecting port 272 to be dislocated from the closed block 282 before the eccentric wheel 281 contacts the jacking rod 264, one end of the jacking rod 264 is hollow, one end of the jacking rod 264 does not close the closed pipe 250, avoiding affecting the liquid to flow between the cavity one 252 and the valve pipe 261.

[0036] Working principle: in use, the initial state, the left end of the limiting rod 234 and the ring piece 233 are in contact position, the closure block 282 is opposite to the connecting port 272, so that the connecting port 272 is blocked, and the end away from the shaft center of the eccentric wheel 281 is also located in the lower right side, when the grinding wheel 112 is worn after work, the distance of the worn part of the grinding wheel 112 needs to be compensated, the drill rod 111 is stopped rotating, so that the grinding head assembly 110 drives the drill rod 111 and the grinding wheel 112 to move left, the drill rod 111 first contacts the push plate, the drill rod 111 drives the push plate and the slide rod 232 to move left against the elastic force of the return spring 235, the slide rod 232 drives the frame 241 to move left, the frame 241 drives the ratchet plate one 242 and the ratchet plate two 243 to move left, the ratchet plate one 242 moves left and is in meshing state with the ratchet gear 244, so as to drive the rotating rod 280 to rotate clockwise, the rotating rod 280 drives the eccentric wheel 281 and the closure block 282 to rotate clockwise, the closure block 282 first deviates from the connecting port 272, so that the cavity one 252 and the cavity two 253 are in communication with each other, the closure block 282 continues to deflect and contacts the jacking rod 264, and drives the jacking rod 264 to move left, so that the jacking rod 264 drives the valve ball 263 to move left, so that the valve ball 263 moves left against the elastic force of the compression spring three 262, so that the cavity one 252 and the valve pipe 261 are in communication, so that the cavity one 252 and the piston pipe 210 are in communication, the clamping assembly 120 moves left under the thrust of the compression spring one 130, drives the piston rod one 211 to move left, through the liquid in the piston pipe 210 and the closed pipe 250, so that the piston rod two 251 moves right and actively contacts the left moving grinding wheel 112, then the grinding wheel 112 contacts the piston rod two 251, drives the piston rod two 251 to move left and pushes the liquid in the cavity two 253, so that the piston rod one 211 pushes the clamping assembly 120 to move right, when the grinding head assembly 110 moves left a certain distance, the rotating rod 280 just rotates half a circle, the end of the eccentric wheel 281 deflects to the left upper side, at this time the eccentric wheel 281 is in disengagement state with the jacking rod 264, the left moving piston rod two 251 pushes the liquid to open the valve ball 263;

[0037] The grinding head assembly 110 starts to move to the right, the slide bar 232 moves to the right under the elastic force of the reset spring 235, thereby driving the frame 241, the first ratchet plate 242 and the second ratchet plate 243 to move to the right, the second ratchet plate 243 moves to the right and engages with the ratchet gear 244, thereby making the rotating rod 280 continue to rotate clockwise, when the slide bar 232 returns to the initial position, the rotating rod 280 rotates again by 180 degrees, so that the slide bar 232 reciprocates once, the rotating rod 280 rotates by 360 degrees, when the drill rod 111 and the grinding wheel 112 move to the right, the grinding wheel 112 is separated from the piston rod two 251, and the valve ball 263 closes one end of the valve pipe 261, preventing the liquid in the pipeline from flowing back into the cavity one 252, then the closing block 282 deflects to the lower right position to close the connecting port 272, so that the cavity one 252 and the cavity two 253 are completely separated, thereby avoiding the clamping assembly 120 from moving to the right by mistake, so that the liquid in the cavity one 252 is sucked into the pipeline, thereby limiting the left and right movement of the clamping assembly 120, and positioning the clamping assembly 120, so as to compensate the wear distance of the outer diameter of the grinding wheel 112 by moving the clamping assembly 120, that is, when the outer diameter of the grinding wheel 112 is worn by one unit distance, the clamping assembly 120 moves relatively to the left by one unit distance through the compensation mechanism 200, so that the grinding wheel 112 can normally contact and polish the workpiece on the clamping assembly 120 without changing the movement parameters of the grinding head assembly 110.

[0038] In the description of the present specification, the description of the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The above is only an example and description of the present application, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as they do not deviate from the invention or exceed the scope defined by the present claims, which shall belong to the protection scope of the present application.

Claims

1. A numerical control grinding machine with automatic compensation device, comprising a machine tool body (100), a transversely movable grinding head assembly (110) is installed on the machine tool body (100), a longitudinally movable drill rod (111) is installed at the top end of the grinding head assembly (110), characterized in that, The top surface side of the machine tool body (100) is slidably connected with a clamping assembly (120), and the other side of the top surface of the machine tool body (100) is fixedly installed with a compensation mechanism (200), the compensation mechanism (200) comprises a stand (220), one side of the clamping assembly (120) is provided with a piston pipe (210), one end of the piston pipe (210) is fixedly connected with the top surface of the machine tool body (100), the other end of the piston pipe (210) is slidably connected with a piston rod one (211), one end of the piston rod one (211) is fixedly connected with the clamping assembly (120), the both ends of the side wall of the piston pipe (210) are fixedly connected with extrusion springs one (130) between the clamping assembly (120), the bottom end of the stand (220) is fixedly connected with the top surface of the machine tool body (100), the top end of the stand (220) is fixedly connected with a driving module (230), the driving module (230) is provided with a reversing module (240), the top end of the stand (220) is fixedly connected with a closed pipe (250) on one side of the reversing module (240), the inner wall of one end of the closed pipe (250) is slidably connected with a piston rod two (251), one end of the drill rod (111) is installed with a grinding wheel (112), the piston rod two (251) is used for contacting the grinding wheel (112), the other end of the closed pipe (250) is fixedly communicated with a one-way valve group (260), the one-way valve group (260) is communicated with the pipe between one end of the piston pipe (210), and the other end of the closed pipe (250) and one end of the piston pipe (210) are added with a liquid; The inner wall of the closed pipe (250) is fixedly connected with a partition plate (270), the inner part of the closed pipe (250) is divided into a cavity one (252) and a cavity two (253) by the partition plate (270), one side wall of the closed pipe (250) is drivingly connected with a rotating rod (280), one end of the rotating rod (280) is drivingly connected with the reversing module (240), one side wall of the partition plate (270) is fixedly connected with a connecting sleeve (271), one side wall of the connecting sleeve (271) is provided with a connecting port (272), the other end of the rotating rod (280) is fixedly connected with a closed block (282) on the outer side wall; The one-way valve group (260) comprises a valve pipe (261), one end of the valve pipe (261) is fixedly communicated with the other end of the closed pipe (250), the other end of the valve pipe (261) is communicated with the pipe, a valve ball (263) is movably arranged in the valve pipe (261), the extrusion spring three (262) is fixedly connected between the valve ball (263) and the other end inner wall of the valve pipe (261); The other end inner wall of the closed pipe (250) is slidably connected with a top rod (264), the other end of the rotating rod (280) is fixedly sleeved with an eccentric wheel (281). The driving module (230) comprises a slide rail (231) fixed at the top end of the stand (220), an inner wall of the slide rail (231) is slidably connected with a slide rod (232), a top surface of the slide rod (232) is fixedly connected with the reversing module (240), and one end of the slide rod (232) is fixedly connected with a push plate; One side of an outer wall of the slide rail (231) is fixedly connected with a ring piece (233), an inner wall of one end of the ring piece (233) is slidably sleeved with a limiting rod (234), one end of the limiting rod (234) is fixedly connected with the push plate, a return spring (235) is fixedly connected between one end of an outer side wall of the limiting rod (234) and the ring piece (233), the other end of the limiting rod (234) is fixedly connected with a limiting block, and the limiting block is used for avoiding disengagement of the limiting rod (234) from the ring piece (233); The reversing module (240) comprises a frame (241), outer side walls of both ends of the frame (241) are fixedly connected with the top surface of the slide rod (232), one end of the rotating rod (280) is fixedly sleeved with a ratchet gear (244), one side wall of the bottom surface of the frame (241) is provided with a ratchet plate one (242), one side of the inner top surface of the frame (241) is provided with a ratchet plate two (243), outer side walls of both ends of the ratchet plate one (242) and the ratchet plate two (243) are fixedly connected with round rods (245), one end of the round rod (245) is slidably inserted into the frame (241), and an outer side wall of the round rod (245) is slidably sleeved with a compression spring two (246); Ratchets on the ratchet plate one (242) and the ratchet plate two (243) face the same direction, and small ends of the ratchets on the ratchet plate one (242) face the same side close to the push plate; One end of the top rod (264) is hollow, and the one end of the top rod (264) does not close the closed pipe (250).

2. The numerically controlled grinding machine with automatic compensation device according to claim 1, characterized in that, The connecting port (272) is located on one side of the outer side wall of the connecting sleeve (271) close to the one end of the closed pipe (250) and is downwardly deviated.

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