A compression testing device for pressing steel ingots into steel bars

Abstract

The present invention discloses a compression testing device for pressing a steel ingot into a steel bar and a clamping method thereof, comprising a base, two fixed blocks fixedly connected to both sides of the upper surface of the base, a mounting block provided between the two fixed blocks, two connecting seats provided on the top of the mounting blocks, a second rotating shaft fixedly connected to the connecting seat, a clamping block rotatably connected and interlaced on the second rotating shaft, a third rotating shaft fixedly connected to the upper surface of one end of the clamping block, a connecting rod rotatably connected and interlaced on the third rotating shaft, a screw rod rotatably connected to one side of the inner wall of a movable groove, a movable block threadedly interlaced on one end of the screw rod, and a fourth rotating shaft fixedly connected to the movable block. The present invention drives the movable block to move on the screw rod by rotating the screw rod, and the connecting rod moves and rotates with the movable block, thereby driving the connecting rod to rotate, adjusting the angle between the two clamping blocks, facilitating the clamping and fixing of workpieces of different sizes and shapes, and improving work efficiency.

Description

Technical Field

[0001] The present invention relates to the field of clamping devices, and in particular to a compression testing device for pressing a steel ingot into a steel bar and a clamping method thereof. Background Art

[0002] During compression testing, steel bars need to be clamped. The existing clamps have a very wide range of uses. When testing steel bars, there are many specifications of steel bars. These different types of workpieces have great differences in size, shape, processing requirements, etc., and the same common clamp cannot be adjusted. The clamping range of the workpiece is limited and cannot adapt to workpieces of various shapes and sizes. The clamp needs to be replaced, which greatly reduces production efficiency. Summary of the Invention

[0003] The object of the present invention is to provide a compression testing device and a clamping method thereof for pressing steel ingots into steel bars, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a compression testing device for pressing a steel ingot into a steel bar and a clamping method thereof, comprising a base, wherein both sides of the upper surface of the base are fixedly connected to two fixed blocks, the two fixed blocks are symmetrically arranged, a first rotating shaft is fixedly connected between the two fixed blocks, a mounting block is rotatably inserted and connected on the first rotating shaft, one side of the top of the mounting block is symmetrically provided with two connecting seats, one side of the connecting seat is provided with a first groove, a second rotating shaft is fixedly connected between the top and bottom of the inner wall of the first groove, a clamping block is rotatably inserted and connected, the upper surface of one end of the clamping block is fixedly connected to a third rotating shaft, a connecting rod is rotatably inserted and connected on the third rotating shaft, a sliding groove is provided on one end of the connecting rod, a movable groove is provided on the other side of the mounting block, a screw is rotatably connected to one side of the inner wall of the movable groove, and a movable block is threadedly inserted and connected, a second groove is provided on the front and back sides of the movable block, a fourth rotating shaft is fixedly connected between the top and bottom of the inner wall of the second groove, and the fourth rotating shaft is slidably inserted and connected to the inner cavity of the sliding groove;

[0005] A press is provided on one side of the base.

[0006] Preferably, a fixing seat is provided in the middle of the upper surface of the base, and mounting grooves are provided on both sides of the fixing seat, and a fifth rotating shaft is fixedly connected between the inner walls of the mounting grooves, and a first rotating rod is rotatably inserted and connected to the fifth rotating shaft, and a through groove is provided on the mounting block, and the inner cavity of the through groove is slidably inserted and connected to one end of the first rotating rod, and a first nut is threadedly inserted and connected to one end of the first rotating rod, and one end of the first rotating rod is fitted with a side wall of the mounting block, and one end of the first rotating rod is fixedly connected to a limiting block.

[0007] Preferably, a first support block is provided below the movable block, one side of the first support block is fixedly connected to the side wall of the mounting block, the top of the first support block is rotatably interlaced with one end of the screw, one end of the screw is threadedly interlaced with a second nut, and one end of the second nut is in contact with the side wall of the first support block.

[0008] Preferably, connecting blocks are fixedly connected to both sides of the upper surface of the fixing seat, the top thread of the connecting block is connected with a bolt, one end of the bolt is rotatably connected to a positioning block, and the lower surface of the positioning block is slidably connected to the upper surface of the fixing seat.

[0009] Preferably, one side of the connecting seat is fixedly connected to a fixing rod, one end of the fixing rod is fixedly connected to a universal ball, and an arc groove is opened on one side of the top of the mounting block, and the inner cavity of the arc groove is rotatably connected with the universal ball.

[0010] Preferably, the upper surface of the base is symmetrically rotatably connected to two second rotating rods, the two second rotating rods are rotatably interlaced with the fixing seat, and the bottom of the second rotating rod is threadedly interlaced with a nut seat.

[0011] Preferably, both sides of the upper surface of the nut seat are fixedly connected to the limiting rod, and both sides of the lower surface of the fixing seat are provided with two slots, and the inner cavity of the slot is slidably connected with the top of the limiting rod.

[0012] Preferably, a first bevel gear is fixedly inserted into the bottom of the second rotating rod, a second bevel gear is provided on one side of the first bevel gear, and the second bevel gear is meshed with the first bevel gear.

[0013] Preferably, a mounting rod is fixedly and inserted into the two second bevel gears, and two second support blocks are symmetrically and rotatably inserted into the mounting rods, and the lower surface of the second support block is fixedly connected to the upper surface of the base.

[0014] The present invention also provides a method for clamping a compression test device for pressing a steel ingot into a steel bar, comprising the following specific steps:

[0015] Step 1: First, place the workpiece on the upper surface of the fixed seat, drive the positioning block to slide on the upper surface of the fixed seat by rotating the bolt, adjust the positions of the two positioning blocks, and limit and fix the front and back sides of the workpiece. Then, by rotating one of the second rotating rods, drive the first bevel gear at the bottom thereof to rotate together. By utilizing the meshing action of the first bevel gear and the second bevel gear, the two second rotating rods move together, and then drive the nut seat at the bottom of the second rotating rod to move on it, so that the fixed seat moves along with the nut seat, and the height of the fixed seat is adjusted;

[0016] Step 2: Then, the mounting block is rotated around the first rotation axis so that the clamping block on the top of the mounting block contacts the side wall of the workpiece, and then the screw is rotated to drive the movable block to move on the screw, and the connecting rod moves and rotates along with the movable block, thereby driving the clamping block connected to one end of the connecting rod to rotate around the second rotation axis so that the side wall of the workpiece between the two clamping blocks fits with the side wall of the clamping block, clamping the workpiece, and then tightening the second nut so that one side of the nut squeezes the side wall of the first support block to fix the screw so that it cannot rotate, thereby ensuring the stability of the two clamping blocks;

[0017] Step 3: Then, by rotating the mounting block, the first rotating rod in the inner cavity of the slide groove is driven to rotate around the axis of the fifth rotating axis. When the clamping block on the top of the mounting block fits against the side wall of the workpiece, by tightening the first nut, one end of the nut is squeezed against the side wall of the mounting block, fixing the mounting block so that it cannot rotate, ensuring that the mounting block and the clamping block stably clamp the workpiece.

[0018] Technical effects and advantages of the present invention:

[0019] (1) The present invention utilizes a setting mode in which a screw, a movable block, a connecting rod and a clamping block are matched with each other. By rotating the screw, the movable block is driven to move on the screw, and the connecting rod moves and rotates along with the movable block, thereby driving the clamping block connected to one end of the connecting rod to rotate around the second rotation axis. The angle between the two clamping blocks is adjusted so that the side wall of the workpiece between the two clamping blocks and the clamping block can be conveniently clamped and fixed on workpieces of different sizes and shapes. The workpiece is fixed well, which facilitates pressure testing by the press.

[0020] (2) The present invention utilizes a setting mode in which the mounting block, the first rotating rod and the first nut cooperate with each other. The first rotating rod in the inner cavity of the slide groove is driven to move together by the rotation of the mounting block. When the clamping block on the top of the mounting block fits against the side wall of the workpiece, the first nut is tightened so that one end of the clamping block presses against the side wall of the mounting block, thereby fixing the mounting block and preventing it from rotating. This ensures that the mounting block and the clamping block can stably clamp the workpiece, facilitating rapid clamping of the workpiece.

[0021] (3) The present invention utilizes a setting method in which the second rotating rod, the first bevel gear and the second bevel gear are matched with each other. The rotation of the second rotating rod drives the nut seat to move up and down. The meshing action of the first bevel gear and the second bevel gear is utilized to make the two second rotating rods move together, thereby driving the nut seat and the fixed seat to move together. The height of the fixed seat is adjusted to support the fixed seat, which is convenient for fixing workpieces of different heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure.

[0024] Figure 3 For the present invention Figure 1 Schematic diagram of the enlarged structure at point B.

[0025] Figure 4 For the present invention Figure 1 Enlarged structural diagram at C.

[0026] Figure 5 This is a schematic diagram of the front structure of the mounting block of the present invention.

[0027] Figure 6 It is a schematic diagram of the side cross-sectional structure of the fixing seat of the present invention.

[0028] Figure 7 For the present invention Figure 6 The enlarged structural diagram at D is shown.

[0029] Figure 8 This is a front cross-sectional structural diagram of the mounting block of the present invention.

[0030] In the figure: 1. base; 2. fixed block; 3. first rotating axis; 4. mounting block; 5. connecting seat; 6. second rotating axis; 7. clamping block; 8. third rotating axis; 9. connecting rod; 10. screw; 11. movable block; 12. fourth rotating axis; 13. fixed seat; 14. fifth rotating axis; 15. first rotating rod; 16. first nut; 17. limiting block; 18. first supporting block; 19. second nut; 20. connecting block; 21. bolt; 22. positioning block; 23. fixing rod; 24. universal ball; 25. second rotating rod; 26. nut seat; 27. limiting rod; 28. first bevel gear; 29. second bevel gear; 30. mounting rod; 31. second supporting block. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] The present invention provides Figure 1-8The shown is a compression testing device for pressing a steel ingot into a steel bar and a clamping method thereof, comprising a base 1, the base 1 plays a role of fixing and supporting, two fixed blocks 2 are fixedly connected on both sides of the upper surface of the base 1, the two fixed blocks 2 are symmetrically arranged, the fixed blocks 2 are used to fix the first rotating shaft 3 and the connecting mounting block 4, the first rotating shaft 3 is fixedly connected between the two fixed blocks 2, the first rotating shaft 3 is rotatably connected with the mounting block 4, the bottom of the mounting block 4 rotates around the first rotating shaft 3 to adjust the angle of the mounting block 4, the mounting block 4 is used to install the connecting clamping block 7, and the mounting block 4 is used to install the connecting clamping block 7. Two connecting seats 5 are symmetrically provided on one side of the top of the mounting block 4. The connecting seat 5 is used to install the clamping block 7. A first groove is opened on one side of the connecting seat 5. A second rotating shaft 6 is fixedly connected between the top and bottom of the inner wall of the first groove. A clamping block 7 is rotatably inserted and connected on the second rotating shaft 6. The clamping block 7 is connected to the connecting seat 5 through the second rotating shaft 6. One end rotates around the second rotating shaft 6 to adjust the angle between the two clamping blocks 7 to fit with the side wall of the workpiece for clamping and fixing. The upper surface of one end of the clamping block 7 is fixedly connected to the third rotating shaft 8. The third rotating shaft 8 is rotatably inserted and connected. A connecting rod 9 is plugged in and connected to the clamping block 7 through a third rotating shaft 8. The clamping block 7 is driven to rotate by the connecting rod 9 to adjust the angle between the two clamping blocks 7. A sliding groove is provided at one end of the connecting rod 9, and a movable groove is provided on the other side of the mounting block 4. One end of the connecting rod 9 is arranged in the inner cavity of the movable groove. The connecting rod 9 rotates and slides in the inner cavity of the movable groove. A screw 10 is rotatably connected to one side of the inner wall of the movable groove. One end of the screw 10 is threadedly inserted and connected to a movable block 11. The movable block 11 is H-shaped and is connected to the connecting rod 9 through a fourth rotating shaft 12. The movable block 11 is connected to the second groove on the front and back sides of the movable block 11. The top and bottom of the inner wall of the second groove are fixedly connected to the fourth rotating shaft 12. The fourth rotating shaft 12 is slidably connected with the inner cavity of the slide groove. By rotating the screw 10, the movable block 11 is driven to move on the screw 10. The connecting rod 9 moves and rotates with the movable block 11, thereby driving the clamping block 7 connected to one end of the connecting rod 9 to rotate around the second rotating shaft 6, adjusting the angle between the two clamping blocks 7 so that the side wall of the workpiece between the two clamping blocks 7 and the clamping block 7;

[0033] A fixing seat 13 is provided in the middle of the upper surface of the base 1. The fixing seat 13 is used to place the workpiece and clamp the workpiece. Mounting grooves are provided on both sides of the fixing seat 13. The two mounting grooves are symmetrically arranged to fix the fifth rotating shaft 14 and facilitate the rotation of the mounting block 4. The fifth rotating shaft 14 is fixedly connected between the inner walls of the mounting grooves. The first rotating rod 15 is rotatably connected to the fifth rotating shaft 14. One end of the first rotating rod 15 rotates around the fifth rotating shaft 14. A through groove is provided on the mounting block 4. The inner cavity of the through groove slides with one end of the first rotating rod 15 The first rotating rod 15 is connected through threading and through threading with a first nut 16. One end of the first nut 16 fits against the side wall of the mounting block 4. One end of the first rotating rod 15 is fixedly connected to the limiting block 17. The first rotating rod 15 in the inner cavity of the slide groove is driven to move together by the rotation of the mounting block 4. When the clamping block 7 on the top of the mounting block 4 fits against the side wall of the workpiece, the first nut 16 is tightened to squeeze one end of the first nut against the side wall of the mounting block 4, thereby fixing the mounting block 4 and preventing it from rotating, thereby ensuring that the mounting block 4 and the clamping block 7 are stably clamped and fixed to the workpiece.

[0034] A first support block 18 is provided below the movable block 11. The first support block 18 is L-shaped and supports and fixes the screw 10. One side of the first support block 18 is fixedly connected to the side wall of the mounting block 4. The top of the first support block 18 is rotatably connected with one end of the screw 10. A second nut 19 is threadedly connected to one end of the screw 10. One end of the screw 10 is fitted with the side wall of the first support block 18. By tightening the second nut 19, one side of the nut 19 is squeezed against the side wall of the first support block 18, thereby fixing the screw 10 so that it cannot rotate, thereby ensuring the stability of the two clamping blocks 7.

[0035] Both sides of the upper surface of the fixing seat 13 are fixedly connected with connecting blocks 20, and the connecting blocks 20 are used to install bolts 21. The top thread of the connecting block 20 is inserted and connected with the bolt 21. One end of the bolt 21 is rotatably connected with a positioning block 22. The lower surface of the positioning block 22 is slidably connected to the upper surface of the fixing seat 13. By rotating the bolt 21, the positioning block 22 is driven to slide on the upper surface of the fixing seat 13, and the positions of the two positioning blocks 22 are adjusted to limit and fix the front and back of the workpiece;

[0036] One side of the connecting seat 5 is fixedly connected to a fixing rod 23, one end of the fixing rod 23 is fixedly connected to a universal ball 24, and one side of the top of the mounting block 4 is provided with an arc groove, the inner cavity of the arc groove is rotatably connected with the universal ball 24, and the connecting seat 5 is movably engaged in the inner cavity of the arc groove through the fixing rod 23 and the universal ball 24, so that the two connecting seats 5 drive the clamping block 7 and the connecting rod 9 to swing in the vertical direction, and the other end of the connecting rod 9 slides up and down on the fourth rotating shaft 12 through the slide groove, so that the clamping block 7 is better fitted with the side wall of the workpiece;

[0037] The upper surface of the base 1 is symmetrically connected to two second rotating rods 25, which are provided with external threads. The two second rotating rods 25 are rotatably connected to the fixed seat 13. The bottom of the second rotating rods 25 is threadedly connected to a nut seat 26. The upper surface of the nut seat 26 fits the lower surface of the fixed seat 13. The rotation of the second rotating rods 25 drives the nut seat 26 to move up and down, supports the fixed seat 13, and adjusts the height of the fixed seat 13, so as to facilitate the fixation of workpieces of different heights.

[0038] Both sides of the upper surface of the nut seat 26 are fixedly connected to the limit rods 27. Two slots are provided on both sides of the lower surface of the fixing seat 13. The inner cavity of the slot is slidably connected with the top of the limit rod 27. The nut seat 26 is limited in movement by the sliding interpenetration of the limit rod 27 and the slot, so that it cannot rotate.

[0039] A first bevel gear 28 is fixedly inserted and connected to the bottom of the second rotating rod 25. A second bevel gear 29 is provided on one side of the first bevel gear 28. The second bevel gear 29 is meshed with the first bevel gear 28. By rotating one of the second rotating rods 25, the first bevel gear 28 at the bottom thereof is driven to rotate together. The meshing action of the two sets of first bevel gears 28 and second bevel gears 29 makes the two second rotating rods 25 move together.

[0040] The two second bevel gears 29 are fixedly connected with a mounting rod 30, and two second support blocks 31 are symmetrically connected and rotated on the mounting rod 30. The lower surface of the second support block 31 is fixedly connected to the upper surface of the base 1. The two second bevel gears 29 are connected by the mounting rod 30, so that the two second bevel gears 29 rotate together, driving the two second rotating rods 25 to move at the same time, ensuring the stability of the fixed base 13.

[0041] Method of use of the present invention:

[0042] First, place the workpiece on the upper surface of the fixing seat 13, and by rotating the bolt 21, drive the positioning block 22 to slide on the upper surface of the fixing seat 13, adjust the positions of the two positioning blocks 22, and limit and fix the front and back sides of the workpiece. Then, by rotating one of the second rotating rods 25, the first bevel gear 28 at the bottom thereof is driven to rotate together. By utilizing the meshing action of the first bevel gear 28 and the second bevel gear 29, the two second rotating rods 25 move together, and then drive the nut seat 26 at the bottom of the second rotating rod 25 to move thereon, so that the fixing seat 13 moves together with the nut seat 26, and the height of the fixing seat 13 is adjusted;

[0043] Then, by rotating the mounting block 4 around the first rotation axis 3, the clamping block 7 on the top of the mounting block 4 contacts the side wall of the workpiece, and then by rotating the screw 10, the movable block 11 is driven to move on the screw 10, and the connecting rod 9 moves and rotates along with the movable block 11, thereby driving the clamping block 7 connected to one end of the connecting rod 9 to rotate around the second rotation axis 6, so that the side wall of the workpiece between the two clamping blocks 7 fits with the side wall of the clamping block 7, clamping the workpiece, and then tightening the second nut 19 so that one side of it squeezes the side wall of the first support block 18, fixing the screw 10 so that it cannot rotate, thereby ensuring the stability of the two clamping blocks 7;

[0044] Next, by rotating the mounting block 4, the first rotating rod 15 in the inner cavity of the slide groove is driven to rotate around the axis of the fifth rotating shaft 14. When the clamping block 7 on the top of the mounting block 4 fits against the side wall of the workpiece, by tightening the first nut 16, one end of the nut is squeezed against the side wall of the mounting block 4, fixing the mounting block 4 so that it cannot rotate, ensuring that the mounting block 4 and the clamping block 7 are stably clamped to the workpiece. After the clamping is stable, a pressure test is performed using a press.

[0045] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A compression testing device for pressing a steel ingot into a steel bar, comprising a base (1), characterized in that: Two fixing blocks (2) are fixedly connected to both sides of the upper surface of the base (1), and the two fixing blocks (2) are symmetrically arranged. A first rotating shaft (3) is fixedly connected between the two fixing blocks (2), and a mounting block (4) is rotatably connected to the first rotating shaft (3). Two connecting seats (5) are symmetrically arranged on one side of the top of the mounting block (4), and a first groove is opened on one side of the connecting seat (5). A second rotating shaft (6) is fixedly connected between the top and bottom of the inner wall of the first groove, and a clamping block (7) is rotatably connected to the second rotating shaft (6). One end of the clamping block (7) is A third rotating shaft (8) is fixedly connected to the upper surface, a connecting rod (9) is rotatably connected to the third rotating shaft (8), a sliding groove is provided at one end of the connecting rod (9), a movable groove is provided at the other side of the mounting block (4), a screw rod (10) is rotatably connected to one side of the inner wall of the movable groove, a movable block (11) is threadedly connected to one end of the screw rod (10), a second groove is provided on the front and back sides of the movable block (11), a fourth rotating shaft (12) is fixedly connected between the top and bottom of the inner wall of the second groove, and the fourth rotating shaft (12) is slidably connected to the inner cavity of the sliding groove; A press is provided on one side of the base (1); A fixing seat (13) is provided in the middle of the upper surface of the base (1), and mounting grooves are provided on both sides of the fixing seat (13), and a fifth rotating shaft (14) is fixedly connected between the inner walls of the mounting grooves, and a first rotating rod (15) is rotatably connected to the fifth rotating shaft (14), and a through groove is provided on the mounting block (4), and the inner cavity of the through groove is slidably connected to one end of the first rotating rod (15), and a first nut (16) is threadedly connected to one end of the first rotating rod (15), and one end of the first nut (16) is fitted with the side wall of the mounting block (4), and one end of the first rotating rod (15) is fixedly connected to the limiting block (17); Both sides of the upper surface of the fixing seat (13) are fixedly connected with connecting blocks (20), the top of the connecting block (20) is threadedly connected with a bolt (21), one end of the bolt (21) is rotatably connected with a positioning block (22), and the lower surface of the positioning block (22) is slidably connected to the upper surface of the fixing seat (13); The upper surface of the base (1) is symmetrically rotatably connected to two second rotating rods (25), the two second rotating rods (25) are rotatably interpenetratingly connected to the fixed seat (13), and the bottom of the second rotating rod (25) is threadedly interpenetratingly connected to a nut seat (26); A first bevel gear (28) is fixedly inserted and connected to the bottom of the second rotating rod (25), a second bevel gear (29) is provided on one side of the first bevel gear (28), and the second bevel gear (29) is meshed and connected to the first bevel gear (28).

2. The compression testing equipment for pressing steel ingots into steel bars according to claim 1, characterized in that: A first support block (18) is provided below the movable block (11), one side of the first support block (18) is fixedly connected to the side wall of the mounting block (4), the top of the first support block (18) is rotatably connected to one end of the screw rod (10), one end of the screw rod (10) is threadedly connected to a second nut (19), and one end of the second nut (19) is in contact with the side wall of the first support block (18).

3. The compression testing equipment for pressing steel ingots into steel bars according to claim 1, characterized in that: A fixing rod (23) is fixedly connected to one side of the connecting seat (5), and a universal ball (24) is fixedly connected to one end of the fixing rod (23). An arc groove is provided on one side of the top of the mounting block (4), and the inner cavity of the arc groove is rotatably connected to the universal ball (24).

4. The compression testing equipment for pressing steel ingots into steel bars according to claim 1, characterized in that: Both sides of the upper surface of the nut seat (26) are fixedly connected to the limiting rod (27), and both sides of the lower surface of the fixing seat (13) are provided with two slots, and the inner cavity of the slot is slidably connected with the top of the limiting rod (27).

5. The compression testing equipment for pressing steel ingots into steel bars according to claim 1, characterized in that: The two second bevel gears (29) are fixedly connected with mounting rods (30) through which they are inserted. The mounting rods (30) are symmetrically connected with two second support blocks (31) through which they are rotated. The lower surface of the second support block (31) is fixedly connected with the upper surface of the base (1).

6. A method for clamping a compression test device for pressing a steel ingot into a steel bar according to any one of claims 1 to 5, characterized in that: The specific steps are as follows: Step 1: First, place the workpiece on the upper surface of the fixed seat (13), and drive the positioning block (22) to slide on the upper surface of the fixed seat (13) by rotating the bolt (21), adjust the positions of the two positioning blocks (22), and limit and fix the front and back sides of the workpiece. Then, by rotating one of the second rotating rods (25), drive the first bevel gear (28) at the bottom thereof to rotate together, and utilize the meshing action of the first bevel gear (28) and the second bevel gear (29) to make the two second rotating rods (25) move together, thereby driving the nut seat (26) at the bottom of the second rotating rod (25) to move thereon, so that the fixed seat (13) moves together with the nut seat (26), and the height of the fixed seat (13) is adjusted; Step 2: Then, the mounting block (4) is rotated around the first rotation axis (3) so that the clamping block (7) on the top of the mounting block (4) contacts the side wall of the workpiece, and then the screw (10) is rotated to drive the movable block (11) to move on the screw (10), and the connecting rod (9) moves and rotates along with the movable block (11), thereby driving the clamping block (7) connected to one end of the connecting rod (9) to rotate around the second rotation axis (6), so that the side wall of the workpiece between the two clamping blocks (7) fits the side wall of the clamping block (7), and the workpiece is clamped and fixed, and then the second nut (19) is tightened so that one side of the nut presses the side wall of the first support block (18), fixes the screw (10), and prevents it from rotating, thereby ensuring the stability of the two clamping blocks (7); Step 3: Then, by rotating the mounting block (4), the first rotating rod (15) in the inner cavity of the slide groove is driven to rotate around the axis of the fifth rotating shaft (14). When the clamping block (7) on the top of the mounting block (4) fits the side wall of the workpiece, by tightening the first nut (16), one end of the nut is pressed against the side wall of the mounting block (4), and the mounting block (4) is fixed so that it cannot rotate, thereby ensuring that the mounting block (4) and the clamping block (7) are stably clamped to the workpiece.

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