Special fixture for thread processing

Abstract

The utility model relates to thread processing technical field discloses special fixture of thread processing, including work table, the top left and right sides of work table all are seted up with sliding slot no.

Description

Technical Field

[0001] This utility model relates to the field of thread processing technology, and in particular to a special fixture for thread processing. Background Technology

[0002] Threading is the process of creating helical grooves on the surface of a workpiece through cutting, rolling, and grinding. It is a key forming technology in the field of mechanical manufacturing and is applied in many industries such as aerospace, automobile manufacturing, and electronic equipment. It is used to produce standard and non-standard parts such as screws, nuts, and pipe fittings. Through threading, fastening connections, transmission functions, and sealing effects between parts can be achieved.

[0003] Specialized thread-machining fixtures are core equipment for ensuring the accuracy and efficiency of thread machining. Through positioning, clamping, and guiding functions, they stably fix the workpiece on the machine tool and ensure that the tool and workpiece maintain a precise relative motion trajectory. Such fixtures need to have high rigidity and quick clamping characteristics to meet production needs.

[0004] Currently, thread-machining fixtures on the market suffer from poor versatility and low clamping efficiency. Traditional fixtures manually fix the workpiece using mechanical pressure plates or bolts, which can effectively prevent displacement during processing and ensure basic machining accuracy. However, because their positioning structure uses fixed-size slots and positioning pins, the entire fixture assembly needs to be replaced for different workpiece specifications. In multi-variety, small-batch production scenarios, frequent fixture replacements not only increase working hours and reduce production efficiency, but also affect machining accuracy due to the cumulative error caused by repeated disassembly and assembly, making it difficult to meet the needs of modern flexible production. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a special fixture for thread processing, which aims to improve the problem in the prior art that the entire set of fixtures needs to be replaced when clamping workpieces of different specifications, resulting in frequent fixture replacements that increase working hours and reduce production efficiency.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a special fixture for thread processing, including a worktable. A sliding groove is provided on both the left and right sides of the top of the worktable. A bidirectional threaded rod is rotatably connected inside the sliding groove. A moving component is provided on the outer wall of the bidirectional threaded rod. A column is fixedly connected to the top of the moving component. Horizontal plates are fixedly connected to the front sides of the two columns. A moving groove is provided on the top of each of the two horizontal plates. A moving threaded rod is rotatably connected to the front side of each of the two horizontal plates. The rear ends of each of the two moving threaded rods pass through the moving groove and are threadedly connected to a clamping plate. A groove is provided in the upper middle part of the front side of each of the two columns. A clamping plate is slidably connected inside each of the two grooves. Multiple adjustment holes are provided on the opposite sides of each of the two columns. Adjusting bolts are rotatably connected to the opposite sides of each of the two clamping plates. The adjacent ends of each of the two adjusting bolts pass through corresponding adjustment holes. A grinding mechanism is provided on both the left and right sides of the worktable. The grinding mechanism is used to grind the processed workpiece.

[0007] As a further description of the above technical solution:

[0008] The grinding mechanism includes two guide rails, with adjacent sides of the two guide rails fixedly connected to the left and right sides of the worktable, respectively. A horizontal groove is provided on the opposite side of each guide rail. A U-shaped frame is slidably connected to the outer wall of each guide rail. Motors are fixedly connected to the lower middle part of the left and right sides of the U-shaped frame. The output ends of both motors pass through the U-shaped frame and are fixedly connected to rollers. A second sliding groove is provided on the top inner side of the U-shaped frame. A first telescopic rod is fixedly connected to the right side of the inner side of the second sliding groove. A second sliding block is fixedly connected to the left end of the first telescopic rod. A second telescopic rod is fixedly connected to the bottom left and right sides of the second sliding block. Grinding blades are fixedly connected to the bottom ends of both second telescopic rods.

[0009] As a further description of the above technical solution:

[0010] The moving component includes a driven bevel gear, which is internally fixedly connected to the middle of the outer wall of the bidirectional threaded rod. A rotating rod is fixedly connected to the rear side of the worktable. The front end of the rotating rod passes through the worktable and is fixedly connected to a driving bevel gear. The driving bevel gear meshes with the driven bevel gear. Sliding blocks are threadedly connected to the left and right sides of the outer wall of the bidirectional threaded rod. The tops of the two sliding blocks are fixedly connected to the bottom of the column.

[0011] As a further description of the above technical solution:

[0012] A switch is fixedly connected to the top front side of the workbench, and the switch is electrically connected to telescopic rod one, the motor and telescopic rod two respectively.

[0013] As a further description of the above technical solution:

[0014] The workbench is fixedly connected to the left and right sides of its bottom, and a base plate is fixedly connected to the bottom of the two supports.

[0015] As a further description of the above technical solution:

[0016] Each of the two brackets has a triangular reinforcing plate fixedly connected to one of its adjacent sides, and the top of each of the two triangular reinforcing plates is fixedly connected to the bottom of the workbench.

[0017] As a further description of the above technical solution:

[0018] The sliding groove 1 has sliding grooves on both the front and back sides, and the two sliding blocks 1 are fixedly connected to sliders on their front and back sides.

[0019] As a further description of the above technical solution:

[0020] Limiting grooves are provided on the left and right sides of the interior of the two horizontal plates, and limiting blocks are fixedly connected to the bottom of the left and right sides of the two clamping plates.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the rotating rod drives the active bevel gear to rotate, and the driven bevel gear drives the bidirectional threaded rod to rotate. The sliding block moves along the bidirectional threaded rod, thereby driving the column to adjust the spacing. Rotating the moving threaded rod causes the clamping plate to move back and forth in the moving groove to clamp the workpiece. Loosening the adjusting bolt, the clamping plate slides in the groove to adjust the height and then is fixed. This realizes that the clamp is adjustable and can be adapted to clamp and fix workpieces of different sizes, ensuring that the workpiece is stable and does not shake during thread processing.

[0023] 2. In this utility model, the rollers driven by the motor roll in the horizontal groove of the guide rail, so that the U-shaped frame can move smoothly left and right to adjust the lateral position. The first telescopic rod pushes the second sliding block to slide in the sliding groove, which drives the second telescopic rod and the grinding blade to move back and forth. The second telescopic rod extends and retracts to adjust the vertical position of the grinding blade, realizing the three-dimensional adjustment of the grinding mechanism. It can fit the surface of different workpieces, improve the grinding accuracy and efficiency, and ensure stable and reliable grinding quality. Attached Figure Description

[0024] Figure 1 This is a perspective view of the thread-machining fixture proposed in this utility model;

[0025] Figure 2 This is a front view of the thread-machining fixture proposed in this utility model;

[0026] Figure 3 This is a cross-sectional view of the special fixture for thread processing proposed in this utility model;

[0027] Figure 4 This is an exploded view of the structure of the thread-machining fixture proposed in this utility model;

[0028] Figure 5 for Figure 4 Enlarged view of point A in the image.

[0029] Legend:

[0030] 1. Workbench; 2. Grinding mechanism; 201. Guide rail; 202. Horizontal groove; 203. U-shaped frame; 204. Motor; 205. Roller; 206. Sliding groove II; 207. Telescopic rod I; 208. Sliding block II; 209. Telescopic rod II; 210. Grinding blade; 3. Sliding groove I; 4. Bidirectional threaded rod; 5. Driven bevel gear; 6. Rotating rod; 7. Driving bevel gear; 8. Sliding block I; 9. Column; 10. Horizontal plate; 11. Moving groove; 12. Moving threaded rod; 13. Clamping plate; 14. Groove; 15. Clamping plate; 16. Adjusting hole; 17. Adjusting bolt; 18. Switch; 19. Bracket; 20. Base plate; 21. Triangular reinforcing plate; 22. Sliding groove; 23. Sliding block; 24. Limiting groove; 25. Limiting block. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of a thread-machining fixture, comprising a worktable 1. Sliding grooves 3 are provided on both the left and right sides of the top of the worktable 1 to provide installation space for a bidirectional threaded rod 4. The bidirectional threaded rod 4 is rotatably connected inside the sliding grooves 3, and its rotation drives a moving assembly to move horizontally. A moving assembly is provided on the outer wall of the bidirectional threaded rod 4 to convert the rotation of the bidirectional threaded rod 4 into horizontal movement of a column 9. A column 9 is fixedly connected to the top of the moving assembly to support a horizontal plate 10 and a clamping plate 15, and to provide vertical positioning support for the workpiece. A horizontal plate 10 is fixedly connected to the front of the two columns 9, providing a track and mounting base for the movement of the clamping plate 13. Both horizontal plates 10 have a movable groove 11 at their top to restrict the movement of the clamping plate 13, allowing it to move only in the front-to-back direction. The front sides of both horizontal plates 10 are rotatably connected to movable threaded rods 12, which, through their own rotation, drive the clamping plate 13 to move back and forth, thus clamping and releasing the workpiece. The rear ends of both movable threaded rods 12 pass through the movable groove 11 and are threadedly connected to the clamping plate 13 to clamp the workpiece, ensuring that it does not shift during processing. The upper middle part of the front side of both columns 9 has a groove 14 to provide space for the vertical movement of the clamping plate 15. The clamping plate 15 is slidably connected inside both grooves 14 to clamp the workpiece from the top and bottom, enhancing the fixation effect on the workpiece. Multiple adjustment holes 16 are provided on the opposite sides of the two columns 9, which cooperate with adjustment bolts 17 to fix the clamping plates 15 at different height positions. Adjustment bolts 17 are rotatably connected to the opposite sides of the two clamping plates 15. By screwing into or out of the adjustment holes 16, the height of the clamping plates 15 can be adjusted and fixed. Grinding mechanisms 2 are provided on both the left and right sides of the worktable 1 for grinding the processed workpieces to improve their surface quality. The grinding mechanism 2 is used to grind the processed parts. The moving component includes a driven bevel gear 5, which transmits the rotation of the driving bevel gear 7 to the bidirectional threaded rod 4, realizing the conversion of force and motion. The driven bevel gear 5 is internally fixedly connected to the bidirectional threaded rod 4. In the middle of the outer wall, to ensure synchronous rotation of both, a rotating rod 6 is fixedly connected to the rear side of the worktable 1 as a power input component, which allows the operator to manually drive the active bevel gear 7 to rotate. The front end of the rotating rod 6 passes through the worktable 1 and is fixedly connected to the active bevel gear 7, which meshes with the driven bevel gear 5, transmitting the rotation of the rotating rod 6 to the driven bevel gear 5. The active bevel gear 7 and the driven bevel gear 5 mesh and connect to realize the change of motion direction and power transmission. The left and right sides of the outer wall of the bidirectional threaded rod 4 are threaded with sliding blocks 8, which convert the rotation of the bidirectional threaded rod 4 into its own linear movement. The tops of the two sliding blocks 8 are fixedly connected to the bottom of the column 9, which drives the column 9 to move with the movement of the sliding blocks 8.

[0033] Specifically, the fixture is placed in a suitable working area, and its stable support is ensured by the brackets 19 on the left and right sides of the bottom of the workbench 1 and the base plate 20. During use, rotating the rotating rod 6 drives the driving bevel gear 7 fixed at its front end to rotate. The driving bevel gear 7 meshes with the driven bevel gear 5, causing the driven bevel gear 5 to drive the bidirectional threaded rod 4 to rotate within the sliding groove 3. When the bidirectional threaded rod 4 rotates, the sliding blocks 8 on the left and right sides of its outer wall move left and right along the bidirectional threaded rod 4 within the sliding groove 3 due to their threaded connection. The sliders 23 on the front and rear sides of the sliding blocks 8 slide within the sliding grooves 22 on the front and rear sides inside the sliding groove 3, ensuring stable movement. This, in turn, drives the column 9 fixed to the top of the sliding blocks 8 to move left and right. Adjusting the distance between the two columns 9 allows the workpiece to be processed to be placed... Between the two columns 9, rotate the movable threaded rod 12. Since the movable threaded rod 12 is threadedly connected to the clamping plate 13 and its rear end passes through the movable groove 11 at the top of the horizontal plate 10, the limiting blocks 25 on the bottom left and right sides of the clamping plate 13 slide in the limiting grooves 24 on the left and right sides inside the horizontal plate 10, so that the clamping plate 13 moves back and forth in the movable groove 11, clamping the workpiece from the front and back direction. For workpieces of different heights, loosen the adjusting bolt 17 to disengage it from the adjusting hole 16, and the clamping plate 15 slides up and down in the groove 14. After adjusting to a suitable height, tighten the adjusting bolt 17 to pass through the adjusting hole 16 to fix the clamping plate 15, thus completing the stable clamping of the workpiece from the top and bottom direction. Then, thread processing can be performed. After processing, the workpiece is polished by the grinding mechanism 2.

[0034] Reference Figure 2 and Figure 3The grinding mechanism 2 includes two guide rails 201, which provide guide tracks for the left and right movement of the U-shaped frame 203. The adjacent sides of the two guide rails 201 are fixedly connected to the left and right sides of the worktable 1, respectively, serving to securely connect the grinding mechanism 2 to the worktable 1. Each of the two guide rails 201 has a horizontal groove 202 on its far side, which cooperates with the roller 205 to allow the U-shaped frame 203 to slide stably along the guide rails 201. The same U-shaped frame 203 is slidably connected to the outer walls of both guide rails 201, serving as a support for the motor 204. The main structure of components such as telescopic rods can be moved and adjusted on guide rail 201. Motors 204 are fixedly connected to the lower middle parts of the left and right sides of the U-shaped frame 203, providing rotational power to the rollers 205 and driving the U-shaped frame 203 to move on the guide rail 201. The output ends of both motors 204 pass through the U-shaped frame 203 and are fixedly connected to the rollers 205. By rolling within the transverse groove 202, the U-shaped frame 203 moves left and right on the guide rail 201. A sliding groove 206 is provided on the inner top of the U-shaped frame 203, serving as a sliding block. The sliding groove 208 provides a movable track for adjusting the front and back position of the grinding blade 210. A telescopic rod 207 is fixedly connected to the right side of the interior of the sliding groove 206. Through telescopic movement, the sliding block 208 moves within the sliding groove 206. The left end of the telescopic rod 207 is fixedly connected to the sliding block 208. Under the action of the telescopic rod 207, the telescopic rod 209 and the grinding blade 210 move back and forth. Telescopic rods 209 are fixedly connected to the left and right sides of the bottom of the sliding block 208 for adjusting the upper position of the grinding blade 210. The lower position allows it to fit the surface of workpieces of different heights. The bottom ends of the two telescopic rods 209 are fixedly connected to grinding blades 210 to perform grinding operations on the workpieces to achieve the required surface accuracy. A switch 18 is fixedly connected to the top front side of the worktable 1 as the control center, which facilitates the operator to control the various components of the grinding mechanism 2. The switch 18 is electrically connected to the telescopic rod 207, the motor 204 and the telescopic rod 209 respectively. By controlling the on and off of the control circuit, the operating status of each component of the grinding mechanism 2 can be adjusted.

[0035] Specifically, the start switch 18 controls the motor 204 to operate. The output end of the motor 204 at the lower middle part of the left and right sides of the U-shaped frame 203 drives the roller 205 to rotate. The roller 205 cooperates with the horizontal groove 202 on the side away from the guide rail 201. Driven by the motor 204, the roller 205 rolls in the horizontal groove 202, causing the U-shaped frame 203 to slide left and right along the outer wall of the two guide rails 201, moving the grinding mechanism 2 to a suitable lateral position of the workpiece to be ground. After determining the lateral position, the switch 18 is operated again to activate the telescopic rod 207. The telescopic rod 207 is fixed inside the right side of the sliding groove 206 at the top of the inner side of the U-shaped frame 203. Through the telescopic movement, it pushes the sliding block 202. 8. The sliding mechanism 2 slides left and right within the sliding groove 206, causing the telescopic rod 209 and the grinding blade 210, which are fixed to the left and right sides of the bottom of the sliding block 208, to move back and forth. This adjusts the relative position of the grinding blade 210 and the workpiece, ensuring that the grinding blade 210 is aligned with the area to be ground. Depending on the height of the workpiece, the telescopic rod 209 is extended or shortened by the switch 18. The telescopic rod 209 extends or shortens as needed, causing the grinding blade 210 at the bottom to move up and down, so that the grinding blade 210 precisely fits the surface of the workpiece. After the above position adjustment is completed, the grinding blade 210 is used to grind the workpiece. The operating status of each component of the grinding mechanism 2 can be controlled by the switch 18.

[0036] Reference Figure 3 , Figure 4 and Figure 5 The bottom left and right sides of the workbench 1 are fixedly connected to brackets 19 to support the workbench 1 and raise it to a suitable working height. The bottom of the two brackets 19 is fixedly connected to a base plate 20, increasing the contact area with the ground and making the entire fixture more stable, preventing shaking during operation. Triangular reinforcing plates 21 are fixedly connected to adjacent sides of the two brackets 19, utilizing the stability of triangles to enhance the connection strength between the brackets 19 and the workbench 1. The tops of the two triangular reinforcing plates 21 are fixedly connected to the bottom of the workbench 1, further improving the stability of the connection between the workbench 1 and the brackets 19, preventing deformation and slippage due to stress. The front and rear sides of the moving groove 3 are provided with sliding grooves 22 to provide sliding tracks for sliders 23, guide and limit the movement of sliding blocks 8. Sliders 23 are fixedly connected to the front and rear sides of the two sliding blocks 8, which cooperate with the sliding grooves 22 to ensure that the sliding blocks 8 move smoothly in the sliding groove 3 and reduce shaking. The left and right sides of the two horizontal plates 10 are provided with limit grooves 24 to provide moving space for limit blocks 25 and limit the moving direction of clamping plates 13. Limit blocks 25 are fixedly connected to the bottom of the left and right sides of the two clamping plates 13, which cooperate with the limit grooves 24 to keep the clamping plates 13 stable when moving back and forth in the moving groove 11 and prevent deviation.

[0037] Specifically, the bracket 19 and the base plate 20 provide support for the entire thread processing fixture, enabling the fixture to be stably placed on the worktable 1, enhancing the connection strength between the bracket 19 and the worktable 1, improving the overall stability of the fixture structure, and dispersing the pressure borne by the worktable 1. The slider 23 slides in the slide groove 22, which can limit the movement direction of the slider block 8, making it only move along the axial direction of the bidirectional threaded rod 4. It also increases the stability and smoothness of the movement of the slider block 8, reducing shaking and friction. The limiting block 25 moves in the limiting groove 24, which can limit the movement range of the clamping plate 13, ensuring that the clamping plate 13 will not deviate in the left or right direction when it moves back and forth to clamp or release the workpiece.

[0038] Working principle: When using this thread-machining special fixture, rotating the rotating rod 6 drives the driving bevel gear 7 fixed at its front end to rotate, and the driven bevel gear 5 rotates accordingly, causing the bidirectional threaded rod 4 fixed inside it to rotate in the sliding groove 3. When the bidirectional threaded rod 4 rotates, the sliding blocks 8 on the left and right sides of its outer wall move left and right along the bidirectional threaded rod 4, thereby driving the column 9 fixed on the top of the sliding block 8 to move left and right on the top of the worktable 1. When it is necessary to clamp the workpiece in the front and back direction, rotating the moving threaded rod 12, because the moving threaded rod 12 and the clamping... The plate 13 is threaded, and the rear end of the moving threaded rod 12 passes through the moving groove 11 at the top of the horizontal plate 10. Therefore, the clamping plate 13 will move back and forth in the moving groove 11 to clamp and fix the workpiece in the front and back directions. For workpieces of different heights, the height of the clamping plate 15 can be adjusted to adapt. Loosen the adjusting bolt 17 to disengage it from the adjusting hole 16. At this time, the clamping plate 15 can slide up and down in the groove 14. After adjusting to a suitable height, tighten the adjusting bolt 17 to pass through the adjusting hole 16 to fix the clamping plate 15, thereby clamping the workpiece in the up and down directions.

[0039] Furthermore, after the motor 204 starts, its output drives the roller 205 to rotate. The roller 205 engages with the horizontal groove 202 on the side of the guide rail 201 away from the guide rail. Driven by the motor 204, the roller 205 rolls within the horizontal groove 202, allowing the U-shaped frame 203 to move smoothly left and right on the guide rail 201, thereby adjusting the lateral position of the grinding mechanism 2. When it is necessary to adjust the front and rear position of the grinding blade 210, the telescopic rod 207 is fixed inside the right side of the sliding groove 206 at the top of the inner side of the U-shaped frame 203. By telescopic... The movement pushes the sliding block 208 to slide left and right within the sliding groove 206, thereby driving the telescopic rod 209 and the grinding blade 210, which are fixed to the left and right sides of the bottom of the sliding block 208, to move back and forth, achieving precise adjustment of the grinding position. As for the vertical adjustment of the grinding blade 210, the telescopic rod 209 extends and retracts according to the actual grinding requirements, driving the grinding blade 210 at the bottom to move up and down to adapt to the grinding of workpieces of different heights, so that the grinding blade 210 can fit against the surface of the workpiece and ensure that the grinding work is carried out smoothly.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A special fixture for thread machining, including a worktable (1), characterized in that: The workbench (1) has sliding grooves (3) on both the left and right sides of its top. A double-threaded rod (4) is rotatably connected inside the sliding groove (3). A moving component is provided on the outer wall of the double-threaded rod (4). A column (9) is fixedly connected to the top of the moving component. A horizontal plate (10) is fixedly connected to the front side of the two columns (9). A moving groove (11) is provided on the top of the two horizontal plates (10). A moving threaded rod (12) is rotatably connected to the front side of the two horizontal plates (10). The rear ends of the two moving threaded rods (12) pass through the moving groove (11). The worktable (1) is threaded with a clamping plate (13). The upper front part of each of the two columns (9) is provided with a groove (14). The inside of each of the two grooves (14) is slidably connected with a clamping plate (15). Multiple adjustment holes (16) are provided on the opposite side of each of the two columns (9). Adjusting bolts (17) are rotatably connected on the opposite side of each of the two clamping plates (15). The adjacent ends of the two adjusting bolts (17) pass through the corresponding adjustment holes (16). Grinding mechanisms (2) are provided on the left and right sides of the worktable (1). The grinding mechanisms (2) are used to grind the workpiece.

2. The thread-machining fixture according to claim 1, characterized in that: The grinding mechanism (2) includes two guide rails (201). The adjacent sides of the two guide rails (201) are fixedly connected to the left and right sides of the worktable (1), respectively. A transverse groove (202) is provided on the opposite side of each of the two guide rails (201). A U-shaped frame (203) is slidably connected to the outer wall of each of the two guide rails (201). Motors (204) are fixedly connected to the lower middle part of the left and right sides of the U-shaped frame (203). The output ends of both motors (204) pass through the U-shaped frame. 203) and a roller (205) is fixedly connected. The top inner side of the U-shaped frame (203) is provided with a sliding groove two (206). The right side of the sliding groove two (206) is fixedly connected with a telescopic rod one (207). The left end of the telescopic rod one (207) is fixedly connected with a sliding block two (208). The bottom left and right sides of the sliding block two (208) are both fixedly connected with telescopic rod two (209). The bottom ends of the two telescopic rod two (209) are both fixedly connected with a grinding knife (210).

3. The thread-machining fixture according to claim 1, characterized in that: The moving component includes a driven bevel gear (5), which is internally fixedly connected to the middle of the outer wall of the bidirectional threaded rod (4). A rotating rod (6) is fixedly connected to the rear side of the worktable (1). The front end of the rotating rod (6) passes through the worktable (1) and is fixedly connected to a driving bevel gear (7). The driving bevel gear (7) meshes with the driven bevel gear (5). Sliding blocks (8) are threadedly connected to the left and right sides of the outer wall of the bidirectional threaded rod (4). The tops of the two sliding blocks (8) are fixedly connected to the bottom of the column (9).

4. The thread-machining fixture according to claim 2, characterized in that: A switch (18) is fixedly connected to the top front side of the workbench (1), and the switch (18) is electrically connected to the first telescopic rod (207), the motor (204) and the second telescopic rod (209) respectively.

5. The thread-machining fixture according to claim 1, characterized in that: The bottom left and right sides of the workbench (1) are fixedly connected to brackets (19), and the bottom of the two brackets (19) are fixedly connected to base plates (20).

6. The thread-machining fixture according to claim 5, characterized in that: Each of the two brackets (19) is fixedly connected to a triangular reinforcing plate (21) on an adjacent side, and the top of each of the two triangular reinforcing plates (21) is fixedly connected to the bottom of the workbench (1).

7. The thread-machining fixture according to claim 3, characterized in that: The sliding groove 1 (3) has a sliding groove (22) on both the front and back sides, and the two sliding blocks 1 (8) are fixedly connected to the sliders (23) on both the front and back sides.

8. The thread-machining fixture according to claim 1, characterized in that: Limiting grooves (24) are provided on the left and right sides of the interior of the two horizontal plates (10), and limiting blocks (25) are fixedly connected to the bottom of the left and right sides of the two clamping plates (13).

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