A processing tooling for elevator step tread molds

Abstract

An embodiment of the present application provides a processing tooling for an elevator step tread mold, which includes a fixed bottom plate, a support bottom plate, and a V-shaped fixing plate; the fixed bottom plate is movably installed on the workbench, the support bottom plate is rotatably connected to the fixed bottom plate, and a first angle adjustment component is arranged between the support bottom plate and the fixed bottom plate; the V-shaped fixing plate is rotatably connected to the support bottom plate, and a second angle adjustment component is arranged between the V-shaped fixing plate and the support bottom plate; the V-shaped fixing plate can not only move along its length direction, but also rotate respectively around its length direction and width direction, with convenient operation. Even a single person can efficiently and accurately complete the adjustment of the mold angle and parallelism, effectively improving the processing efficiency while saving human resources.

Description

Technical Field

[0001] The invention relates to the field of tooling design for elevator die-casting molds, and in particular to a tooling for processing elevator step pedal molds. Background Art

[0002] With the rapid development of China's economy, urban construction is also changing with each passing day. The demand for escalators and moving walkways has increased significantly, and the step pedals on elevators are in short supply. The processing time and processing quality of elevator step pedal molds will affect the product delivery of the entire step pedal to a certain extent. Due to the irregular shape of the elevator step pedal mold, in order to meet the overall safety performance of the product and meet the product size requirements, shorten the mold processing time, and reduce processing costs, mold EDM is essential.

[0003] During EDM machining, electrodes need to be designed according to different needs, and the bottom of the step pedal mold is usually triangular, with a large drop at both ends of the triangle. If the electrode is designed according to conventional processing methods, it is difficult to control the thickness of the electrode material, which will lead to unstable processing size control and increased consumption of electrode materials. Therefore, in order to reduce the loss of electrode materials and improve the control accuracy of dimensions, during EDM machining, it is usually necessary to place the step pedal mold on a V-shaped pad and align the mold processing surface at a certain angle. Conventional V-shaped pads cannot adjust the mold angle at will, and installation and fixing are troublesome. When using, two people are required to cooperate with the calibration table to adjust the angle and parallelism and level it multiple times, which is inefficient and wastes manpower.

[0004] Therefore, it is necessary to develop a kind of elevator step pedal mold processing tooling to solve the above-mentioned technical problems. Summary of the invention

[0005] The embodiment of the present invention provides an elevator step pedal mold processing tooling to solve the technical problems that conventional V-shaped pads cannot adjust the mold angle at will, are troublesome to install and fix, have low efficiency and waste manpower.

[0006] An elevator step pedal mold processing tool provided by an embodiment of the present invention includes:

[0007] a fixed base plate, the fixed base plate being movably mounted to the workbench and being movable on the workbench along the X direction;

[0008] a supporting base plate, the supporting base plate being rotatably connected to the fixed base plate and capable of rotating relative to the fixed base plate around an X direction; and

[0009] A V-shaped fixing plate for carrying the workpiece, wherein the bottom end of the V-shaped fixing plate is rotatably connected to the supporting base plate so that the V-shaped fixing plate can rotate relative to the supporting base plate around the Y direction;

[0010] Wherein, the X direction is consistent with the length direction of the V-shaped fixing plate, and the Y direction is consistent with the width direction of the V-shaped fixing plate; a first angle adjusting component is connected between the support bottom plate and the fixed bottom plate for adjusting the rotation angle of the support bottom plate around the X direction; a second angle adjusting component is connected between the V-shaped fixing plate and the support bottom plate for adjusting the rotation angle of the V-shaped fixing plate around the Y direction.

[0011] Optionally, a plurality of elongated fixing holes extending along the X direction are formed in the fixed bottom plate, and a plurality of fixing bolts are correspondingly provided. The fixing bolts pass through the fixing holes to fixedly connect the fixed bottom plate with the workbench.

[0012] Optionally, a clearance through hole for the fixing bolt to pass through is formed in the support bottom plate.

[0013] Optionally, the support bottom plate is hinged to the fixed bottom plate through a first pin shaft, and the length direction of the first pin shaft is consistent with the X direction; the first angle adjusting component is arranged at the free end of the support bottom plate opposite to the first pin shaft.

[0014] Optionally, the first angle adjusting component includes a first adjusting screw rod and a first moving block; the first adjusting screw rod is vertically fixed to the fixed bottom plate along the Z direction and can rotate around its own axis; the Z direction is consistent with the height direction of the V-shaped fixing plate; the first moving block is threadedly connected to the first adjusting screw rod and can reciprocate along the first adjusting screw rod under the drive of the first adjusting screw rod; the support bottom plate is fixedly connected to the first moving block.

[0015] Optionally, a safety anti-loosening piece is further arranged between the support bottom plate and the fixed bottom plate. The safety anti-loosening piece is arranged at the free end of the support bottom plate opposite to the first pin shaft, and both ends of the safety anti-loosening piece are respectively connected to the support bottom plate and the fixed bottom plate through bolts.

[0016] Optionally, the bottom end of the V-shaped fixing plate is hinged to the support bottom plate through a second pin shaft, and the length direction of the second pin shaft is consistent with the Y direction; the second angle adjusting component is connected to one of the side plates of the V-shaped fixing plate.

[0017] Optionally, the second angle adjusting component includes a second adjusting screw rod, a second moving block and a connecting rod; the second adjusting screw rod is fixedly installed on the support bottom plate along the X direction and can rotate around its own axis; the second moving block is threadedly connected to the second adjusting screw rod and can reciprocate along the second adjusting screw rod under the drive of the second adjusting screw rod; both ends of the connecting rod are respectively hinged to the second moving block and one of the side plates of the V-shaped fixing plate.

[0018] Optionally, a plurality of support components are symmetrically arranged between the V-shaped fixing plate and the support bottom plate. The support component includes a first support rod, a second support rod and a locking bolt. One end of the first support rod and the second support rod are respectively hinged to the V-shaped fixing plate and the support bottom plate, and the other end of the first support rod is slidably inserted into the second support rod. A chute is formed on the second support rod along its length direction, and the locking bolt passes through the chute to lock and fix the first support rod and the second support rod.

[0019] Optionally, a plurality of threaded holes and adjusting bolts are arranged on one side plate of the V-shaped fixing plate. The adjusting bolts are in threaded cooperation with the threaded holes and can pass through the threaded holes to abut against the workpiece. A plurality of long holes are formed on the other side plate of the V-shaped fixing plate along its length direction, and a plurality of positioning bolts are arranged. The positioning bolts can pass through the long holes to fixedly connect the workpiece and the V-shaped fixing plate.

[0020] The embodiment of the present invention has the following beneficial effects: A movable fixed bottom plate is installed on the workbench, the support bottom plate is rotatably connected to the fixed bottom plate, and a first angle adjusting component for adjusting the rotation angle of the support bottom plate is arranged between the support bottom plate and the fixed bottom plate; The V-shaped fixing plate is rotatably connected to the support bottom plate, and a second angle adjusting component for adjusting the rotation angle of the V-shaped fixing plate is arranged between the V-shaped fixing plate and the support bottom plate; The V-shaped fixing plate can not only move along its length direction, but also rotate around its length direction and width direction respectively, with convenient operation. Even a single person can efficiently and accurately complete the adjustment of the die angle and parallelism, effectively improving the processing efficiency while saving human resources. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the embodiment of the present invention;

[0023] Figure 2 It is a three-dimensional structural schematic diagram of another perspective of the embodiment of the present invention;

[0024] Figure 3 It is a front view of the embodiment of the present invention;

[0025] Figure 4Usage state diagram of the embodiment of the present invention;

[0026] Figure 5 is Figure 4 front view;

[0027] The numbers in the figure represent:

[0028] 1. Fixed bottom plate; 2. Support bottom plate; 3. V-shaped fixing plate; 4. Workpiece; 5. Workbench; 6. Installation groove; 7. Avoidance through hole; 8. First pin shaft; 9. First adjusting screw; 10. First moving block; 11. Insurance anti-loosening piece; 12. Second pin shaft; 13. Second adjusting screw; 14. Second moving block; 15. Connecting rod; 16. Connecting seat; 17. First support rod; 18. Second support rod; 19. Locking bolt; 20. Sliding groove; 21. Adjusting bolt; 22. Long slot; 23. Positioning bolt. Detailed implementation method

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described here are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0032] Please refer to Figures 1 - 3As shown in the figure, an embodiment of the present invention provides a processing tooling for an elevator step tread mold, including a fixed bottom plate 1, a support bottom plate 2, and a V-shaped fixing plate 3. Among them, the V-shaped fixing plate 3 is used to carry the workpiece 4. For convenience of description, in this article, the length direction of the V-shaped fixing plate 3 is defined as the X direction, the width direction of the V-shaped fixing plate 3 is defined as the Y direction, and the height direction of the V-shaped fixing plate 3 is defined as the Z direction.

[0033] The fixed bottom plate 1 is movably installed on the workbench 5 so that it can move along the X direction on the workbench 5; the support bottom plate 2 is rotatably connected to the fixed bottom plate 1, so that the support bottom plate 2 can rotate relative to the fixed bottom plate 1 around the X direction; the bottom end of the V-shaped fixing plate 3 is rotatably connected to the support bottom plate 2, so that the V-shaped fixing plate 3 can rotate relative to the support bottom plate 2 around the Y direction. To sum up, the V-shaped fixing plate 3 can not only move along the X direction with the fixed bottom plate 1 and rotate around the X direction with the support bottom plate 2, but also rotate around the Y direction by itself, so that the operator can freely adjust the processing position, angle and parallelism of the workpiece 4.

[0034] At the same time, a first angle adjustment component is connected between the support bottom plate 2 and the fixed bottom plate 1 to adjust the rotation angle of the support bottom plate 2 around the X direction; a second angle adjustment component is connected between the V-shaped fixing plate 3 and the support bottom plate 2 to adjust the rotation angle of the V-shaped fixing plate 3 around the Y direction. The operation is convenient. Even a single operator can efficiently and accurately complete the adjustment of the angle and parallelism of the workpiece 4, effectively improving the processing efficiency and saving human resources at the same time.

[0035] Specifically, in this embodiment, a plurality of long strip-shaped fixing holes are opened on the fixed bottom plate 1. The length direction of the fixing holes is consistent with the X direction. A plurality of fixing bolts pass through the corresponding fixing holes to fixedly connect the fixed bottom plate 1 and the workbench 5 (an installation groove 6 corresponding to the fixing holes is provided on the workbench 5). Loosen the fixing bolts to move the fixed bottom plate 1 left and right along the X direction. In addition, since the support bottom plate 2 and the fixed bottom plate 1 are arranged up and down relative to each other in this embodiment, to avoid interference of the support bottom plate 2 with the fixing holes and fixing bolts (the fixing holes and fixing bolts are not shown in the figure due to being blocked by the support bottom plate 2), this embodiment also opens an avoidance through hole 7 on the support bottom plate 2 for the fixing bolts to pass through. The avoidance through holes 7 are arranged in one-to-one correspondence with the fixing holes, and their sizes need to be slightly larger than the fixing holes, so that the operator can install or adjust the fixing bolts on the fixed bottom plate 1 through the avoidance through holes 7.

[0036] Further, in this embodiment, the supporting base plate 2 is hinged to the fixed base plate 1 through the first pin shaft 8. The length direction of the first pin shaft 8 needs to be consistent with the X direction, so that the supporting base plate 2 can rotate relative to the fixed base plate 1 around the X direction; the first angle adjustment component is arranged at the free end of the supporting base plate 2 (i.e., the end opposite to the first pin shaft 8). As a reference, in this embodiment, the first pin shaft 8 is arranged at the center of the left and right sides of the supporting base plate 2 and the fixed base plate 1, so that the front and rear ends of the supporting base plate 2 are both free ends that can rotate up and down. In this embodiment, the first angle adjustment component is arranged at the front end of the supporting base plate 2.

[0037] As an alternative embodiment, the first angle adjustment component in this embodiment includes a first adjustment screw 9 and a first moving block 10. Among them, the first adjustment screw 9 is vertically fixed to the fixed base plate 1 along the Z direction, and the first adjustment screw 9 can rotate around its own axis; the first moving block 10 is threadedly connected to the first adjustment screw 9, and the supporting base plate 2 is fixedly connected to the first moving block 10. Rotating the first adjustment screw 9 can drive the first moving block 10 to reciprocate up and down along the first adjustment screw 9, thereby driving the free end of the supporting base plate 2 to rotate up and down and adjusting the rotation angle of the supporting base plate 2.

[0038] In addition, in this embodiment, a safety anti-loosening piece 11 is also arranged between the supporting base plate 2 and the fixed base plate 1. The safety anti-loosening piece 11 is also arranged at the free end of the supporting base plate 2. Circular through holes and waist-shaped through holes are respectively arranged at both ends of the safety anti-loosening piece 11. After adjusting the rotation angle of the supporting base plate 2, the two ends of the safety anti-loosening piece 11 can be fixedly connected to the supporting base plate 2 and the fixed base plate 1 respectively through bolts, so as to prevent the rotation angle of the supporting base plate 2 from changing by using the safety anti-loosening piece 11.

[0039] Similarly, in this embodiment, the bottom end of the V-shaped fixing plate 3 is hinged to the supporting base plate 2 through the second pin shaft 12. The length direction of the second pin shaft 12 needs to be consistent with the Y direction, so that the V-shaped fixing plate 3 can rotate relative to the supporting base plate 2 around the Y direction; the second angle adjustment component is connected to one of the side plates of the V-shaped fixing plate 3 (for example, in this embodiment, it is connected to the left side plate of the V-shaped fixing plate 3).

[0040] As an alternative embodiment, the second angle adjustment component in this embodiment includes a second adjustment screw 13, a second moving block 14, and a connecting rod 15. Among them, the second adjustment screw 13 is fixedly installed on the support base plate 2 through connecting parts such as a bearing seat. The length direction of the second adjustment screw 13 needs to be consistent with the X direction and can rotate around its own axis; the second moving block 14 is threadedly connected to the second adjustment screw 13. The lower end of the connecting rod 15 is hinged to the second moving block 14, and the upper end is hinged to one of the side plates of the V-shaped fixing plate 3. As a reference, in this embodiment, a connecting seat 16 is provided at the bottom of the left side plate of the V-shaped fixing plate 3, and the upper end of the connecting rod 15 is hinged to the connecting seat 16. Rotating the second adjustment screw 13 can drive the second moving block 14 to move left and right reciprocally along the second adjustment screw 13, thereby driving the left and right ends (i.e., the free ends) of the V-shaped fixing plate 3 to rotate up and down by using the connecting rod 15, and adjusting the rotation angle of the V-shaped fixing plate 3 around the Y direction.

[0041] Furthermore, in this embodiment, a plurality of support components are symmetrically arranged between the V-shaped fixing plate 3 and the support base plate 2 (for example, four support components are symmetrically arranged at the four corners of the V-shaped fixing plate 3). Specifically, the support component includes a first support rod 17, a second support rod 18, and a locking bolt 19; the upper end of the first support rod 17 is hinged to the V-shaped fixing plate 3, and the lower end is slidably inserted into the second support rod 18; the lower end of the second support rod 18 is hinged to the support base plate 2, and a chute 20 is provided on the second support rod 18 along its length direction. The locking bolt 19 can pass through the chute 20 to lock and fix the first support rod 17 and the second support rod 18. When adjusting the rotation angle of the V-shaped fixing plate 3 by using the second angle adjustment component, the locking bolt 19 needs to be loosened so that the first support rod 17 can slide along the second support rod 18 as the V-shaped fixing plate 3 rotates; after adjusting the rotation angle of the V-shaped fixing plate 3, the first support rod 17 and the second support rod 18 can be locked and fixed by using the locking bolt 19, thereby using the first support rod 17 and the second support rod 18 to support and position the left and right ends of the V-shaped fixing plate 3 to prevent the rotation angle of the V-shaped fixing plate 3 from changing.

[0042] In addition, due to the different bottom included angles of the workpiece 4, for some workpieces 4 with inconsistent included angles with the V-shaped fixing plate 3, after being placed in the V-shaped fixing plate 3, their side walls cannot be completely attached to the two side plates of the V-shaped fixing plate 3, resulting in the workpiece 4 being prone to move during the adjustment of the angle and parallelism. Therefore, in this embodiment, a plurality of adjusting bolts 21 and threaded holes for connecting the adjusting bolts 21 are provided on one of the side plates of the V-shaped fixing plate 3. The adjusting bolts 21 are in threaded fit with the threaded holes and can pass through the threaded holes to abut against the workpiece 4 inside the V-shaped fixing plate 3. When there is a gap between the side wall of the workpiece 4 and the two side plates of the V-shaped fixing plate 3, the adjusting bolt 21 can be rotated to push the workpiece 4 from one side by the adjusting bolt 21, so that the other side of the workpiece 4 can be completely attached to the other side plate of the V-shaped fixing plate 3. Correspondingly, in this embodiment, a plurality of long holes 22 are formed in the other side plate of the V-shaped fixing plate 3 along its length direction. After adjusting the workpiece 4 to be completely attached to the other side plate by using the adjusting bolt 21, a plurality of positioning bolts 23 can be passed through the long holes 22 to be fixedly connected with the workpiece 4 (a plurality of threaded connection holes are correspondingly provided on the workpiece 4), and the workpiece 4 is fixedly connected with the V-shaped fixing plate 3 by using the positioning bolts 23, thereby effectively preventing the workpiece 4 from moving during the adjustment of the angle and parallelism.

[0043] As Figure 4 , Figure 5 shown, taking the electric discharge machining of the step pedal mold as an example, during use, first install the above-mentioned processing tooling on the workbench 5 of the electric discharge machine. After adjusting the position of the tooling along the X direction and straightening it, fixedly connect the fixed bottom plate 1 with the workbench 5 by using the fixing bolts; then, place the workpiece 4 (i.e., the mold to be processed) into the V-shaped fixing plate 3, rotate the adjusting bolt 21, and push the workpiece 4 from the right side by the adjusting bolt 21. After the left side wall of the workpiece 4 is completely attached to the left side plate of the V-shaped fixing plate 3, fixedly connect the workpiece 4 with the V-shaped fixing plate 3 by using the positioning bolts 23; after fixing the workpiece 4, loosen the locking bolt 19, rotate the second adjusting screw 13 to adjust the rotation angle of the V-shaped fixing plate 3 around the Y direction, and after adjusting the angle in this direction, re-lock and fix the first support rod 17 and the second support rod 18 by using the locking bolt 19; then, loosen the safety anti-loosening piece 11 between the support bottom plate 2 and the fixed bottom plate 1, rotate the first adjusting screw 9 to adjust the rotation angle of the support bottom plate 2 around the X direction. After rotating the workpiece 4 to the required machining angle, lock and fix the safety anti-loosening piece 11 with the support bottom plate 2 and the fixed bottom plate 1 to complete the adjustment steps.

[0044] In this article, specific examples are used to illustrate the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present invention; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An elevator step tread mold processing tooling, characterized in that Comprising: A fixed bottom plate, which is movably mounted to a workbench and can move along the X direction on the workbench; A support bottom plate, which is rotatably connected to the fixed bottom plate and can rotate relative to the fixed bottom plate about the X direction; And A V-shaped fixing plate for carrying a workpiece, the bottom end of the V-shaped fixing plate is rotatably connected to the support bottom plate, so that the V-shaped fixing plate can rotate relative to the support bottom plate about the Y direction; Wherein, the X direction is consistent with the length direction of the V-shaped fixing plate, and the Y direction is consistent with the width direction of the V-shaped fixing plate; A first angle adjustment component is connected between the support bottom plate and the fixed bottom plate to adjust the rotation angle of the support bottom plate about the X direction; A second angle adjustment component is connected between the V-shaped fixing plate and the support bottom plate to adjust the rotation angle of the V-shaped fixing plate about the Y direction; The support bottom plate is hinged to the fixed bottom plate through a first pin shaft, and the length direction of the first pin shaft is consistent with the X direction; The first angle adjustment component is arranged at the free end of the support bottom plate opposite to the first pin shaft; The first angle adjustment component includes a first adjustment screw rod and a first moving block; The first adjustment screw rod is vertically fixed to the fixed bottom plate along the Z direction and can rotate about its own axis; The Z direction is consistent with the height direction of the V-shaped fixing plate; The first moving block is threadedly connected to the first adjustment screw rod and can reciprocate along the first adjustment screw rod under the drive of the first adjustment screw rod; The support bottom plate is fixedly connected to the first moving block; The bottom end of the V-shaped fixing plate is hinged to the support bottom plate through a second pin shaft, and the length direction of the second pin shaft is consistent with the Y direction; The second angle adjustment component is connected to one of the side plates of the V-shaped fixing plate; The second angle adjustment component includes a second adjustment screw rod, a second moving block and a connecting rod; The second adjustment screw rod is fixedly installed on the support bottom plate along the X direction and can rotate about its own axis; The second moving block is threadedly connected to the second adjustment screw rod and can reciprocate along the second adjustment screw rod under the drive of the second adjustment screw rod; Two ends of the connecting rod are respectively hinged to the second moving block and one of the side plates of the V-shaped fixing plate.

2. The processing tooling for an elevator step tread mold according to claim 1, characterized in that: A plurality of elongated fixing holes extending along the X direction are formed in the fixed bottom plate, and a plurality of fixing bolts are correspondingly arranged. The fixing bolts pass through the fixing holes to fixedly connect the fixed bottom plate and the workbench.

3. The processing tooling for an elevator step tread mold according to claim 2, characterized in that: A clearance through hole for the fixing bolt to pass through is formed in the support bottom plate.

4. The processing tooling for an elevator step tread mold according to claim 1, characterized in that: An insurance anti-loosening piece is further arranged between the support bottom plate and the fixed bottom plate. The insurance anti-loosening piece is arranged at the free end of the support bottom plate opposite to the first pin shaft, and two ends of the insurance anti-loosening piece are respectively connected to the support bottom plate and the fixed bottom plate through bolts.

5. The processing tooling for an elevator step tread mold according to claim 1, characterized in that: A plurality of support components are symmetrically arranged between the V-shaped fixing plate and the support bottom plate. The support components include a first support rod, a second support rod, and a locking bolt. One end of the first support rod and the second support rod are respectively hinged to the V-shaped fixing plate and the support bottom plate. The other end of the first support rod is slidably inserted into the second support rod. A chute is formed on the second support rod along its length direction, and the locking bolt passes through the chute to lock and fix the first support rod and the second support rod.

6. A processing tooling for an elevator step pedal mold according to any one of claims 1-5, characterized in that: A plurality of threaded holes and adjusting bolts are arranged on one side plate of the V-shaped fixing plate. The adjusting bolts are in threaded cooperation with the threaded holes and can pass through the threaded holes to abut against the workpiece. A plurality of long holes are formed on the other side plate of the V-shaped fixing plate along its length direction, and a plurality of positioning bolts are arranged. The positioning bolts can pass through the long holes to fixedly connect the workpiece and the V-shaped fixing plate.

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