Self-compensation type guide rail gap adjusting mechanism of numerically controlled lathe

Abstract

The invention relates to the technical field of numerically-controlled lathes, and particularly discloses a numerically-controlled lathe self-compensation type guide rail gap adjusting mechanism which comprises a numerically-controlled lathe body, the numerically-controlled lathe body comprises a fixing frame, a rotatable threaded rod is arranged on the fixing frame, two sets of threaded sleeves are arranged on the threaded rod, and the two sets of threaded sleeves are arranged on the fixing frame. A movable table capable of moving relatively is arranged between the two sets of threaded sleeves, and self-compensation mechanisms are arranged between the two sets of threaded sleeves and the movable table. The self-compensation mechanism comprises a first fixing block, the first fixing block is fixedly connected to the threaded sleeve, the first fixing block is clamped on the fixing frame in a sliding mode, a matching column is fixedly connected to the movable table, and the matching column is installed on the first fixing block in a penetrating mode; the technical problem that after a threaded rod works for a long time, the threaded rod and a tool rest can move relatively due to abrasion of the threaded rod, and therefore the precision of a numerical control lathe is affected is solved.

Description

Technical Field

[0001] The invention relates to the technical field of numerically controlled lathes, and in particular discloses a self-compensating guide rail clearance adjusting mechanism for a numerically controlled lathe. Background Art

[0002] A lathe is a machine tool that primarily uses a turning tool to perform turning operations on rotating workpieces. Lathes are the most important type of metal cutting machine tool and are the most numerous type of machine tool in general machine manufacturing plants. They are also known as machine tools. CNC lathes can perform processes such as grooving, drilling, reaming, reaming, and boring, and offer high precision.

[0003] For example, the invention patent with patent application number 2018100055159 discloses a CNC lathe, including a frame, a fixture, a tool holder, and a turning tool. The fixture includes a spindle box arranged on the frame, a limit tube arranged in the spindle box, a material guide tube arranged in the limit tube, a chuck threadedly connected to the material guide tube, a sliding drive mechanism arranged on the frame, and a rotating drive mechanism arranged on the frame. A transverse slide rail is provided on the frame, a saddle is slidably connected to the transverse slide rail, a push rod is provided on the saddle, and a power part is provided on the frame. The movement of the tool holder of the existing CNC lathe is usually controlled by a threaded rod. After working for a long time, the threaded rod will wear, which may cause slight shaking between the threaded rod and the tool holder. When the threaded rod drives the tool holder to move, errors will occur, thereby affecting the accuracy of the CNC lathe. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a self-compensating guide rail gap adjustment mechanism for a CNC lathe to solve the technical problem that after the threaded rod works for a long time, the threaded rod and the tool holder can move relative to each other due to wear of the threaded rod, thereby affecting the accuracy of the CNC lathe.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a self-compensating guide rail gap adjustment mechanism for a CNC lathe, comprising a CNC lathe body, the CNC lathe body comprising a fixed frame, a rotatable threaded rod being provided on the fixed frame, two groups of threaded sleeves being provided on the threaded rod, a relatively movable platform being provided between the two groups of threaded sleeves, and a self-compensating mechanism being provided between the two groups of threaded sleeves and the movable platform; the self-compensating mechanism comprising a first fixed block, the first fixed block being fixedly connected to the threaded sleeve, the first fixed block being slidably clamped on the fixed frame, a matching column being fixedly connected to the movable platform, the matching column being passed through the first fixed block; a matching component for fixing the threaded sleeve is provided on the first fixed block.

[0006] Furthermore, the self-compensating mechanism also includes a second matching block, which is fixedly connected to the first fixed block, the cross-section of the second matching block is triangular, the matching column is U-shaped, and a movable cavity is provided between the first fixed block and the matching column, and the first matching block is slidably mounted in the movable cavity, and one side of the first matching block is fitted with the inclined surface of the second matching block; a third matching block is slidably mounted between the first fixed block and the movable platform, the cross-section of the third matching block is triangular, and the inclined surface of the third matching block is fitted with one side of the first matching block, and a first fixed groove is provided on the movable platform, and the first matching block is vertically aligned with the first fixed groove.

[0007] Furthermore, the mating component includes a first arc block, a second fixed groove is provided on the third mating block, the first arc block is fixedly connected to the second fixed groove, the second fixed groove is also fixedly connected to the first stop block, and the first stop block is L-shaped; the first arc block is slidably mounted with a stop block, the stop block is provided with an arc rod, the arc rod is passed through the sliding groove, and the second stop block and the arc column are fixedly connected to the arc rod; a spring is mounted on the arc column, the first fixed block is fixedly connected to a mating frame, the arc column is passed through the mating frame, and both ends of the spring are in contact with the second stop block and the mating frame respectively.

[0008] Furthermore, the stop block includes a first movable block and a second movable block, the first movable block is hinged on the second movable block, a conical block is fixedly connected to the first stop block, and the conical block is located between the first movable block and the second movable block; several groups of ropes are arranged between the first movable block and the second movable block, and the two ends of the ropes are fixedly connected to the first movable block and the second movable block respectively; the arc rod is fixedly connected to the first movable block.

[0009] Furthermore, a driving mechanism is provided between the two groups of self-compensating mechanisms, and the driving mechanism includes a rotating device, a connecting frame is fixedly connected to the movable table, the fixed end of the rotating device is fixedly connected to the connecting frame, and the output end of the rotating device is fixedly connected to two groups of second fixed blocks; linkage components are provided on both groups of the second fixed blocks, and the two groups of linkage components respectively cooperate with the two groups of self-compensating mechanisms.

[0010] Furthermore, the linkage assembly includes a fourth mating block, a limiting column is fixedly connected to the first fixed block, the limiting column is rotatably connected to the fourth mating block, and a fixing column is fixedly connected to the second fixed block, and the fixing column is in contact with the fourth mating block; one end of the fourth mating block is fixedly connected to a second arc block, and the fixing column is located between the fourth mating block and the second arc block; a push block is provided at the other end of the fourth mating block, one side of the push block is in contact with the first arc block, and the push block is in contact with the resisting block.

[0011] Furthermore, two groups of cooperating frames are fixedly connected to the fixed frame, and the two ends of the threaded rod are respectively installed on the two groups of cooperating frames and are rotatably connected to the cooperating frames; a driving motor is provided on the threaded rod, and the output end of the driving motor is connected to the threaded rod through a coupling; two groups of slide rails are fixedly connected to the fixed frame, and several groups of sliding blocks are fixedly connected to the movable platform, and the several groups of sliding blocks are respectively slidably clamped on the two groups of slide rails.

[0012] Furthermore, a limiting block is fixedly connected to the third matching block, and the limiting block is slidably mounted on the first fixed block.

[0013] The working principle and beneficial effects of this solution are:

[0014] When the CNC lathe is turning a workpiece, it first controls the self-compensation mechanism through the drive mechanism to make the threaded sleeve tightly connected to the threaded rod, and then starts the drive motor. The output end of the drive motor drives the threaded rod to rotate, and the threaded rod drives the threaded sleeve and the movable table to move on the fixed frame. Since the two sets of threaded sleeves are tightly connected to the threaded rod at this time, even if there is a gap between the threaded rod and the threaded sleeve during movement, the threaded sleeve will not produce relative movement on the threaded rod, thereby ensuring the accuracy of the movement of the movable table and the accuracy of the workpiece turned by the CNC lathe.

[0015] When in use, first start the rotating device. The rotating device drives the stop block to move into the first stop block by controlling the two sets of linkage components, so that the first movable block and the second movable block are respectively moved to the two ends of the tapered block, and the first movable block and the second movable block are opened in an eight-shaped shape through the tapered block, so that the first movable block contacts the second movable block and pushes the third matching block. The third matching block drives the first matching block to move, and the first matching block pushes the first fixed block and the threaded sleeve, so that the threaded sleeve is tightly connected to the threaded rod, thereby ensuring the accuracy of the CNC lathe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of an embodiment;

[0017] Figure 2 Schematic diagram of the internal structure of the embodiment;

[0018] Figure 3 Schematic diagram of the connection structure between the self-compensation mechanism and the driving mechanism in the embodiment;

[0019] Figure 4 for Figure 3 A magnified schematic diagram of point A in the middle;

[0020] Figure 5 for Figure 3 A magnified schematic diagram of point B in the middle;

[0021] Figure 6 Schematic diagram of the internal structure of the movable platform in the embodiment;

[0022] Figure 7 for Figure 6 Enlarged schematic diagram of point C in the middle.

[0023] The numbers in the drawings are as follows: CNC lathe body 101, fixing frame 102, threaded rod 103, matching frame 104, threaded sleeve 105;

[0024] Slide rail 201, slide block 202;

[0025] First fixing block 301, matching hole 302, matching column 303, movable platform 304, movable cavity 305, first matching block 306, second matching block 307, third matching block 308, limiting block 309, limiting groove 310, first fixing groove 311;

[0026] First arc block 401, second fixed slot 402, first stop block 403, sliding slot 404, tapered block 405, stop block 406, first movable block 407, second movable block 408, arc rod 409, second stop block 410, arc column 411, spring 412, matching frame 413, rope 414;

[0027] Rotating device 501 , connecting frame 502 , second fixing block 503 , fixing column 504 , fourth matching block 505 , second arc block 506 , pushing block 507 , limiting column 508 . DETAILED DESCRIPTION

[0028] The following is further described in detail through specific implementation methods:

[0029] Example

[0030] like Figures 1 to 7As shown, a self-compensating guide rail clearance adjustment mechanism for a CNC lathe is disclosed, comprising a CNC lathe body 101, a fixed frame 102 is provided in the CNC lathe body 101, and both ends of the fixed frame 102 are fixedly connected to a matching frame 104, the two sets of matching frames 104 are aligned, and a rotatable threaded rod 103 is provided between the two sets of matching frames 104, one end of the threaded rod 103 is fixedly connected to the output end of the drive motor through a coupling, and the drive motor is fixedly connected to the CNC lathe body 10 by bolts. 1, the threaded rod 103 is equipped with two sets of threaded sleeves 105, a movable platform 304 is provided between the two sets of threaded sleeves 105, the two sets of threaded sleeves 105 are slidably connected to the movable platform 304, a plurality of sets of sliding blocks 202 are fixedly connected to the movable platform 304, the sliding blocks 202 are fixedly connected to the fixed frame 102 by bolts, a plurality of sets of slide rails 201 are respectively slidably mounted on the two sets of sliding blocks 202, and a self-compensating mechanism is provided between the two sets of threaded sleeves 105 and the movable platform 304.

[0031] The self-compensating mechanism includes a first fixed block 301, which is slidably mounted on the fixed frame 102, and the first fixed block 301 is fixedly connected to the threaded sleeve 105. A matching hole 302 is opened on the first fixed block 301, and a matching column 303 is provided on the movable platform 304. The matching column 303 is U-shaped, and the matching column 303 consists of a horizontal block and two groups of vertical blocks. The two groups of vertical blocks are fixedly connected to both ends of the horizontal block, and the matching columns 303 are installed in the matching holes 302. The two groups of matching columns 303 are both installed on the horizontal block. The first fixed block 301 does not contact the vertical block. The gap between the first fixed block 301 and the vertical block is a movable cavity 305. A second matching block 307 is fixedly connected to the first fixed block 301. The second matching block 307 is located in the movable cavity 305, and one side of the second matching block 307 is inclined. 5, a first matching block 306 is slidably mounted in the inner portion. The first matching block 306 is quadrilateral and not rectangular. A first fixing slot 311 is provided on the movable platform 304. The first fixing slot 311 is vertically aligned with the first matching block 306. One surface of the first matching block 306 is in contact with the inclined surface of the second matching block 307. The first fixed block 301 does not contact the movable platform 304. A third matching block 308 is slidably mounted between the first fixed block 301 and the movable platform 304. The third matching block 308 is triangular in shape. The inclined surface of the third matching block 308 is in contact with one surface of the first matching block 306. A limiting block 309 is fixedly connected to the third matching block 308. A limiting slot 310 is provided on the first fixed block 301. The limiting block 309 is slidably mounted on the limiting slot 310. A matching component is provided on the first fixed block 301, such as Figure 3 and Figure 6 shown.

[0032] The matching assembly includes a first arc block 401, a second fixed groove 402 is opened on the third matching block 308, the first arc block 401 is fixedly connected in the second fixed groove 402, and the third matching block 308 is fixedly connected to the first stop block 403, the first stop block 403 is L-shaped, and a stop block 406 is slidably mounted between the first stop block 403 and the second fixed groove 402, and the stop block 406 includes a first movable block 407 and a second movable block 408, the first movable block 407 is hinged to the second movable block 408, and the first stop block 403 is fixedly connected to the conical block 405, which is mounted between the first movable block 407 and the second movable block 408, and the hinge point of the first movable block 407 and the second movable block 408 is away from the conical block 405, and the first movable block 407 and the second Several groups of ropes 414 are provided between the movable blocks 408, and the two ends of the ropes 414 are fixedly connected to the first movable block 407 and the second movable block 408 respectively. The first movable block 407 is provided with an arc rod 409, and the first stop block 403 is provided with a sliding groove 404. The arc rod 409 is slidably mounted in the sliding groove 404. The arc rod 409 is fixedly connected to the second stop block 410. The first stop block 403 is located between the second stop block 410 and the second movable block 408. The second stop block 410 is provided with an arc column 411, and the arc column 411 is sleeved with a spring 412. The first fixed block 301 is fixedly connected to the matching frame 104, and the arc column 411 is installed on the matching frame 104. The two ends of the spring 412 are in contact with the second stop block 410 and the matching frame 104 respectively. Figure 4 、 Figure 5 and Figure 7 shown.

[0033] A driving mechanism is provided between the two sets of self-compensating mechanisms, and the driving mechanism includes a rotating device 501, and two sets of second fixed blocks 503 are provided at the output end of the rotating device 501. The two sets of second fixed blocks 503 are respectively provided with linkage components. The two sets of linkage components cooperate with the two sets of self-compensating mechanisms respectively. The linkage components include a fourth matching block 505, a limiting column 508 is fixedly connected to the first fixed block 301, and the limiting column 508 is installed in the fourth matching block 505. The fourth matching block 505 is rotatably connected to the limiting column 508, and one end of the fourth matching block 505 is fixedly connected to the second arc block 506. The fourth matching block 505 and the second arc block 50 6 are located in the same horizontal plane, the fourth matching block 505 and the second fixed block 503 are not located in the same horizontal plane, the top surface of the fourth matching block 505 contacts the bottom surface of the second fixed block 503, the second fixed block 503 is fixedly connected with a fixing column 504, the fixing column 504 contacts the fourth matching block 505, and the fixing column 504 and the fourth matching block 505 are horizontally aligned, and a push block 507 is provided at the other end of the fourth matching block 505, one side of the push block 507 contacts the first arc block 401, the push block 507 can slide on the first arc block 401, and the push block 507 contacts the abutment block 406 at the same time, and the push block 507 abuts the abutment block 406, as shown in FIG. Figure 3 and Figure 6 shown.

[0034] The output motor, coupling and rotating device 501 are all commonly used technical means by those skilled in the art. Although the output motor and coupling are not shown in the figure, their structures, connection methods and usage are well known to those skilled in the art.

[0035] When implementing:

[0036] When in use, first start the rotating device 501, the output end of the rotating device 501 drives the two sets of second fixed blocks 503 to rotate, the two sets of second fixed blocks 503 drive the corresponding linkage components to move, the rotation of the second fixed blocks 503 drives the fixed column 504 to move, the fixed column 504 drives the fourth matching block 505 to rotate around the limit column 508, the fourth matching block 505 drives the push block 507 to slide on the first arc block 401, and at the same time the push block 507 drives the block 406 to slide on the first arc block 401. The stopper 406 moves toward the direction close to the first stopper 403. At this time, the stopper 406 drives the arc rod 409 to move. The arc rod 409 slides in the sliding groove 404. The arc rod 409 drives the second stopper 410 and the arc column 411 to move. The arc column 411 slides on the matching frame 104. When the second stopper 410 moves, the distance between the second stopper 410 and the matching frame 104 is shortened. The second stopper 410 compresses the spring 412 until the stopper 406 moves to the first stopper 403. The stop block 403 is on the stop block 403. At this time, the stop block 406 pushes the third matching block 308, and the stop block 406 drives the third matching block 308 to slide between the first fixed block 301 and the movable platform 304. The third matching block 308 drives the limiting block 309 to slide in the limiting groove 310. The third matching block 308 pushes the first matching block 306 to move through the inclined surface, so that the first matching block 306 slides downward in the movable cavity 305. The first matching block 306 drives the third matching block 308 to slide downward in the movable cavity 305 by cooperating with the second matching block 307. One fixed block 301 moves toward the direction of another group of first fixed blocks 301. When the first fixed block 301 moves, it drives the corresponding threaded sleeve 105 to move horizontally on the threaded rod 103. At this time, the two groups of threaded sleeves 105 clamp the threaded rod 103. When the threaded rod 103 drives the threaded sleeve 105 to move, it can ensure that when the threaded rod 103 rotates, it can drive the threaded sleeve 105 to rotate. At the same time, the threaded sleeve 105 will not slide relatively on the threaded rod 103, thereby ensuring the accuracy of the CNC lathe.

[0037] When the workpiece needs to be turned, the drive motor is started, and the output end of the drive motor drives the coupling and the threaded rod 103 to rotate. The threaded rod 103 rotates between the two sets of matching frames 104. When the threaded rod 103 rotates, it drives the two sets of threaded sleeves 105 to move. The two sets of threaded sleeves 105 drive the corresponding first fixed block 301 and movable platform 304 to move. The fixed frame 102 limits the first fixed block 301, so that the first fixed block 301 moves horizontally on the threaded rod 103, thereby driving the movable platform 304 to move horizontally on the fixed frame 102. When the movable platform 304 moves, it drives the corresponding sliding block 202 to slide on the fixed frame 102.

[0038] When the stop block 406 moves into the first stop block 403, the first movable block 407 and the second movable block 408 move until the first movable block 407 and the second movable block 408 move to the two ends of the tapered block 405 respectively. Since the tapered block 405 is tapered, the first movable block 407 rotates around the second movable block 408, and the distance between the two ends of the first movable block 407 and the second movable block 408 gradually increases. First, the first movable block 407 contacts the third matching block 308, and then the first movable block 407 continues to rotate around the second movable block 408. The third matching block 308 is driven to move by the first movable block 407, and the third matching block 308 drives the first matching block 306 to move. The first matching block 306 drives the first fixed block 301 and the threaded sleeve 105 to move, so that the threaded sleeve 105 is fastened to the threaded rod 103 to prevent the threaded sleeve 105 from shaking on the threaded rod 103.

[0039] When the second fixed block 503 drives the linkage assembly to move, the second fixed block 503 first drives the fixed column 504 to move, and the fixed column 504 drives the fourth matching block 505 to rotate around the limiting column 508. When the limiting column 508 rotates, it drives the second arc block 506 and the push block 507 to rotate respectively. When the push block 507 rotates, it slides on the first arc block 401, thereby driving the block 406 to move; when the linkage assembly moves the block 406 into the first stopper 403, the second fixed block 503 is always in contact with the fourth matching block 505. When the second fixed block 503 drives the fourth matching block 505 to move, the second fixed block 503 slides on the fourth matching block 505, thereby driving the block 406 to move; when the block 406 needs to be moved out of the first block 403, the output end of the rotating device 501 drives the second fixed block 503 to move, and the second fixed block 503 drives the fixed column 504 to separate from the fourth matching block 505. At this time, the spring 412 stretches and releases the elastic potential energy, and the spring 412 drives the second block 410 and the arc rod 406 to move. 9 and the arc column 411 move, the arc rod 409 slides in the sliding groove 404, the arc rod 409 drives the block 406 to move, the block 406 slides on the first arc block 401, the block 406 drives the push block 507 to move, the push block 507 drives the fourth matching block 505 to rotate on the limiting column 508, so that the fourth matching block 505 moves to contact with the fixed column 504, when the fourth matching block 505 moves, it also drives the second arc block 506 to move, the block 406 first separates from the first stopper 403, and then After the rear spring 412 is fully extended, the stop block 406 stops moving. At this time, the second fixed block 503 drives the fixed column 504 to move, so that the fixed column 504 is separated from the fourth matching block 505 until the fixed column 504 contacts the second arc block 506. Since the second arc block 506 is arc-shaped, the fixed column 504 cannot drive the fourth matching block 505 to rotate around the limit column 508 through the second arc block 506, thereby ensuring that the fixed column 504 is always located between the fourth matching block 505 and the second arc block 506.

[0040] The rope 414 is used to limit the rotation angle between the first movable block 407 and the second movable block 408 to prevent the angle between the first movable block 407 and the second movable block 408 from being too large, causing the first movable block 407 to be stuck at one end of the first arc block 401, affecting the normal use of the matching assembly.

[0041] The above description is merely an embodiment of the present invention. Common knowledge regarding the specific structure and characteristics of the solution is not described in detail herein. It should be noted that those skilled in the art will be able to make various modifications and improvements without departing from the structure of the present invention. These modifications and improvements should also be considered within the scope of protection of the present invention and will not affect the effectiveness and practicality of the present invention.

Claims

1. A self-compensating guide rail clearance adjustment mechanism for a CNC lathe, characterized by: The invention comprises a CNC lathe body, wherein the CNC lathe body comprises a fixed frame, wherein a rotatable threaded rod is provided on the fixed frame, wherein two sets of threaded sleeves are provided on the threaded rod, a relatively movable platform is provided between the two sets of threaded sleeves, and a self-compensating mechanism is provided between the two sets of threaded sleeves and the movable platform; The self-compensation mechanism includes a first fixed block, the first fixed block is fixedly connected to the threaded sleeve, the first fixed block is slidably clamped on the fixed frame, and the movable platform is fixedly connected to a matching column, and the matching column is installed on the first fixed block; The first fixing block is provided with a matching component for fixing the threaded sleeve.

2. The self-compensating guide rail clearance adjustment mechanism for a CNC lathe according to claim 1, characterized in that: The self-compensating mechanism further includes a second mating block, which is fixedly connected to the first fixed block. The second mating block has a triangular cross-section, and the mating column has a U-shape. A movable cavity is provided between the first fixed block and the mating column, and the first mating block is slidably mounted in the movable cavity. One surface of the first mating block is in contact with the inclined surface of the second mating block. A third matching block is slidably mounted between the first fixed block and the movable platform. The cross-section of the third matching block is triangular. The inclined surface of the third matching block is in contact with one side of the first matching block. A first fixing groove is provided on the movable platform. The first matching block is vertically aligned with the first fixing groove.

3. The self-compensating guide rail clearance adjustment mechanism for a CNC lathe according to claim 2, characterized in that: The matching assembly includes a first arc-shaped block, a second fixing groove is formed on the third matching block, the first arc-shaped block is fixedly connected in the second fixing groove, and a first stopper is also fixedly connected in the second fixing groove, and the first stopper is L-shaped; A stop block is slidably mounted on the first arc block, and an arc rod is provided on the stop block. The arc rod passes through the sliding groove, and a second stop block and an arc column are fixedly connected to the arc rod. The arc column is sleeved with a spring, the first fixed block is fixedly connected with a matching frame, the arc column is installed on the matching frame, and the two ends of the spring are respectively in contact with the second stop block and the matching frame.

4. The self-compensating guide rail clearance adjustment mechanism for a CNC lathe according to claim 3, characterized in that: The stop block includes a first movable block and a second movable block, the first movable block is hinged to the second movable block, and a tapered block is fixedly connected to the first stop block, and the tapered block is located between the first movable block and the second movable block; A plurality of ropes are provided between the first movable block and the second movable block, and two ends of the ropes are fixedly connected to the first movable block and the second movable block respectively; The arc-shaped rod is fixedly connected to the first movable block.

5. The self-compensating guide rail clearance adjustment mechanism for a CNC lathe according to claim 4, characterized in that: A driving mechanism is provided between the two sets of self-compensating mechanisms, the driving mechanism including a rotating device, a connecting frame fixedly connected to the movable platform, a fixed end of the rotating device fixedly connected to the connecting frame, and two sets of second fixed blocks fixedly connected to the output end of the rotating device; The two groups of the second fixing blocks are both provided with linkage components, and the two groups of the linkage components cooperate with the two groups of the self-compensation mechanisms respectively.

6. The self-compensating guide rail clearance adjustment mechanism for a CNC lathe according to claim 5, characterized in that: The linkage assembly includes a fourth matching block, the first fixed block is fixedly connected to a limiting post, the limiting post is rotatably connected to the fourth matching block, and the second fixed block is fixedly connected to a fixing post, the fixing post is in contact with the fourth matching block; One end of the fourth matching block is fixedly connected to the second arc block, and the fixing column is located between the fourth matching block and the second arc block; A push block is provided at the other end of the fourth matching block, one side of the push block is in contact with the first arc-shaped block, and the push block is in contact with the abutment block.

7. The self-compensating guide rail clearance adjustment mechanism for a CNC lathe according to claim 6, characterized in that: Two sets of matching frames are fixedly connected to the fixing frame, and both ends of the threaded rod are respectively installed on the two sets of matching frames and are rotatably connected to the matching frames; A drive motor is provided on the threaded rod, and an output end of the drive motor is connected to the threaded rod through a coupling; Two groups of slide rails are fixedly connected to the fixed frame, and a plurality of slide blocks are fixedly connected to the movable platform. The plurality of slide blocks are respectively slidably mounted on the two groups of slide rails.

8. The self-compensating guide rail clearance adjustment mechanism for a CNC lathe according to claim 7, characterized in that: The third matching block is fixedly connected to a limiting block, and the limiting block is slidably mounted on the first fixed block.

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