A curved beam four-point bending composite test piece reinforcing sheet bonding tool

Abstract

This utility model belongs to the field of composite material processing technology and discloses a bonding fixture for reinforcing sheets of composite test specimens undergoing four-point bending of curved beams. It includes a base plate, two support structures, and two pressing structures. The two support structures are spaced apart on the base plate, and the spacing between them is adjustable. The two pressing structures correspond to the two support structures. Each support structure includes a sliding seat and a support plate. The sliding seat is slidably mounted on the base plate, and the support plate is rotatably mounted on the sliding seat. The test specimen abuts against the two support plates. The pressing structure includes a fixed plate and a pressing plate. The fixed plate is mounted on the corresponding support plate, and the pressing plate is adjustablely positioned on the fixed plate, with the fixed plate configured to abut against the reinforcing sheet. By rotating the support plate and moving the sliding seat, this fixture can be applied to test specimens with different bending angles and different loading end lengths, exhibiting good versatility. The pressing plate evenly abuts against the reinforcing sheet, ensuring the uniformity and stability of the bonding between the reinforcing sheet and the loading end.

Description

Technical Field

[0001] This utility model relates to the field of composite material processing technology, and in particular to a bonding tooling for reinforcing sheets of a four-point bending composite test piece for curved beams. Background Technology

[0002] The four-point bending test of curved beams is a commonly used method in composite material testing to study interlaminar tensile strength. It obtains the interlaminar tensile failure strength by introducing out-of-plane tensile stress into the bending region of the specimen. When a bending load is applied, specimens with low bending stiffness, high interlaminar strength, or both, may experience excessive bending of the straight edges, leading to significant errors in bending moment calculations and resulting in non-conservative strength calculations. Therefore, it is necessary to reinforce the straight edges at the loading ends to reduce bending. A common reinforcement measure is to bond reinforcing sheets of a certain thickness to the loading ends on both sides to improve stiffness.

[0003] During the bonding process of reinforcing sheets, without the assistance of tooling, slippage of the reinforcing sheets can easily occur, thus compromising the symmetry of the test specimen along the neutral plane. Existing reinforcing sheet tooling is mostly designed for bonding reinforcing sheets to flat specimens and is unsuitable for specimens with bending angles. Therefore, there is an urgent need to develop a reinforcing sheet bonding tooling suitable for specimens with bending angles. Utility Model Content

[0004] The purpose of this utility model is to provide a reinforcing sheet bonding fixture for a four-point bending composite test piece of a curved beam, which is applicable to four-point bending composite test pieces of curved beams with different bending angles and different loading end lengths, and the reinforcing sheet is bonded evenly, which can ensure the reliability of subsequent test results.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A bonding fixture for reinforcing sheets of a four-point bending composite test specimen of a curved beam is provided, comprising:

[0007] The base plate is set on a supporting foundation;

[0008] Two support structures are spaced apart on the base plate, and the distance between the two support structures is adjustable;

[0009] The support structure includes a sliding seat and a support plate. The sliding seat is slidably disposed on the base plate along a first horizontal direction, and the support plate is rotatably disposed on the sliding seat around a second horizontal direction. The two loading ends of the test piece abut against the two support plates in a corresponding manner. The first horizontal direction is perpendicular to the second horizontal direction.

[0010] Two pressing structures are provided corresponding to the two supporting structures;

[0011] The pressing structure includes a fixing plate and a pressing plate. The fixing plate is disposed on the corresponding support plate, and the pressing plate is adjustablely disposed on the fixing plate. The fixing plate is configured to abut against the reinforcing sheet to bond the reinforcing sheet to the loading end.

[0012] As an optional tooling solution, the support structure further includes:

[0013] A rotating shaft extends along the second horizontal direction, the rotating shaft is disposed on the support plate, and is rotatably disposed on the sliding seat;

[0014] An adjusting shaft extends along the second horizontal direction, and an arc-shaped through hole is provided on the sliding seat, through which the adjusting shaft is movably inserted;

[0015] A fixing pin is provided, and an arc-shaped plate is provided inside the arc-shaped through hole. The portion of the arc-shaped plate extending out of the arc-shaped through hole is provided with multiple limiting holes at intervals. The fixing pin passes through the adjusting shaft and any of the limiting holes in sequence.

[0016] As an optional tooling solution, the support plate includes:

[0017] The support portion is rotatably mounted on the sliding seat and is used to support the loading end of the test piece;

[0018] A stop portion is provided on the support portion to stop the loading end and the end of the reinforcing piece;

[0019] Two connecting parts are spaced apart on the supporting part and are configured to connect with the fixing plate.

[0020] As an optional tooling solution, the support structure further includes a limiting component, which includes:

[0021] A limiting plate, which is rotatably disposed on the supporting part, is used to abut against the loading end and the reinforcing piece;

[0022] A locking element is inserted into the limiting plate and the supporting part to lock the limiting plate to the supporting part.

[0023] As an optional tooling solution, the outer peripheral contour of the limiting plate is arc-shaped.

[0024] As an optional tooling solution, the pressing structure also includes a push rod, which is adjustablely inserted through the fixed plate. The first end of the push rod is connected to the pressing plate. Moving the second end of the push rod can cause the pressing plate to gradually approach and abut against the reinforcing plate.

[0025] As an optional tooling solution, multiple push rods are provided, and the multiple push rods are spaced apart along the second horizontal direction.

[0026] As an optional tooling solution, the second end of the push rod is provided with an operating part.

[0027] As an optional tooling solution, a guide groove is provided on the base plate, the guide groove extends along the first horizontal direction, and a sliding part is provided on the bottom side of the sliding seat. The sliding part is slidably disposed in the guide groove, and the sliding part can be locked in the guide groove.

[0028] As an optional tooling solution, the cross-section of the guide groove is inverted T-shaped.

[0029] The beneficial effects of this utility model are:

[0030] This invention provides a fixture for bonding reinforcing sheets to composite test specimens undergoing four-point bending of curved beams. A support plate is rotated around a second horizontal direction to align the included angle between the two support plates with the included angle α between the two loading ends of the test specimen. Then, a sliding seat is moved along a first horizontal direction to align the distance between the two sliding seats with the dimensions of the test specimen. Finally, the position of the pressing plate is adjusted so that it gradually approaches and abuts against the reinforcing sheet, achieving bonding between the loading end and the reinforcing sheet. By rotating the support plate and moving the sliding seat, this fixture is applicable to test specimens with different bending angles and loading end lengths, exhibiting good versatility. Furthermore, the uniform abutment of the pressing plate against the reinforcing sheet ensures the uniformity and stability of the bonding between the reinforcing sheet and the loading end, guaranteeing the reliability and repeatability of subsequent test results. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the test piece provided in a specific embodiment of this utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the reinforcing sheet bonding tooling for the four-point bending composite test piece of the curved beam provided in the specific embodiment of this utility model;

[0033] Figure 3 This is an exploded view of the reinforcing sheet bonding fixture for the four-point bending composite test piece of the curved beam provided in the specific embodiment of this utility model;

[0034] Figure 4 yes Figure 2 A magnified view of a portion of point A in the middle.

[0035] In the picture:

[0036] 100. Test specimen; 101. Loading end; 200. Reinforcing sheet;

[0037] 1. Base plate; 11. Guide groove; 12. Locking component;

[0038] 2. Supporting structure;

[0039] 21. Sliding seat; 211. Arc-shaped through hole;

[0040] 22. Support plate; 221. Supporting part; 222. Stopping part; 223. Connecting part;

[0041] 23. Rotating shaft; 24. Adjusting shaft; 25. Fixing pin; 26. Arc plate; 261. Limiting hole;

[0042] 27. Limiting component; 271. Limiting plate; 272. Locking component;

[0043] 3. Pressing structure; 31. Fixing plate; 32. Pressing plate; 33. Push rod; 331. Operating part; 34. Fastener. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0045] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0048] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0049] This embodiment provides a reinforcing sheet bonding fixture (hereinafter referred to as "fixture") for a curved beam four-point bending composite test specimen, used to bond the reinforcing sheet 200 to the reinforcing end of the curved beam four-point bending test specimen 100. Figure 1 As shown, the included angle between the two reinforcing ends of the test piece 100 is α, which can be 60°, 90° or 120°, and reinforcing sheets 200 need to be bonded to both sides of each reinforcing end.

[0050] like Figures 2 to 4 As shown, the fixture includes a base plate 1, two support structures 2, and two pressing structures 3. The base plate 1 is mounted on a support base, and the two support structures 2 are spaced apart on the base plate 1 with adjustable spacing. The two pressing structures 3 are correspondingly positioned to the two support structures 2. Each support structure 2 includes a sliding seat 21 and a support plate 22. The sliding seat 21 is slidably mounted on the base plate 1 along a first horizontal direction, and the support plate 22 is rotatably mounted on the sliding seat 21 around a second horizontal direction. The two loading ends 101 of the test piece 100 abut against the two support plates 22 in a corresponding manner, with the first horizontal direction perpendicular to the second horizontal direction. Each pressing structure 3 includes a fixing plate 31 and a pressing plate 32. The fixing plate 31 is mounted on the corresponding support plate 22, and the pressing plate 32 is adjustablely positioned on the fixing plate 31. The fixing plate 31 is configured to abut against the reinforcing sheet 200 to ensure that the reinforcing sheet 200 can be bonded to the loading end 101.

[0051] Rotate the support plate 22 around the second horizontal direction so that the included angle between the two support plates 22 matches the included angle α between the two loading ends 101 of the test piece 100. Then move the sliding seat 21 along the first horizontal direction so that the distance between the two sliding seats 21 matches the size of the test piece 100. Finally, adjust the position of the pressing plate 32 so that the pressing plate 32 gradually approaches the reinforcing sheet 200 and abuts against the reinforcing sheet 200, thereby achieving bonding between the loading end 101 and the reinforcing sheet 200.

[0052] By rotating the support plate 22 and moving the sliding seat 21, this fixture can be applied to test pieces 100 with different bending angles and different loading end 101 lengths, and has good versatility. In addition, the pressing plate 32 abuts evenly against the reinforcing plate 200, which can ensure the uniformity and stability of the bonding between the reinforcing plate 200 and the loading end 101, and ensure the reliability and repeatability of subsequent test results.

[0053] The aforementioned supporting base can be a flat ground, tabletop, or operating surface.

[0054] Optionally, such as Figure 2 As shown, a guide groove 11 is provided on the base plate 1, extending along a first horizontal direction. A sliding part is provided on the bottom side of the sliding seat 21, which is slidably disposed within the guide groove 11 and can be locked within the guide groove 11. The cooperation between the sliding part and the guide groove 11 ensures smooth movement of the sliding seat 21 while also ensuring the accuracy of the movement direction of the sliding seat 21. After the distance between the two sliding seats 21 is adjusted to the correct position, the sliding part is locked within the guide groove 11 to ensure stability during the subsequent bonding process.

[0055] Specifically, a locking member 12 is provided at the position corresponding to the sliding part of the sliding seat 21. The end of the locking member 12 is connected to the sliding part and screwed onto the sliding seat 21. When the sliding seat 21 moves to the desired position, the locking member 12 is screwed on, causing the sliding part to move and lock the sliding part in the guide groove 11, thereby preventing the sliding seat 21 from moving under external force disturbance. The locking member 12 can be a bolt or a screw.

[0056] For example, in this embodiment, two guide grooves 11 are provided at intervals along the second horizontal direction. Correspondingly, two sliding parts are provided at the bottom of each sliding seat 21, and the two sliding parts are slidably disposed in the two guide grooves 11 in a one-to-one correspondence.

[0057] Furthermore, combined Figure 3 The cross-section of the guide groove 11 is inverted T-shaped, and correspondingly, the cross-section of the sliding part is also inverted T-shaped. With the above arrangement, the guide groove 11 and the sliding part form a mechanical interlock structure, which can prevent the sliding part from disengaging from the guide groove 11 due to external force disturbance during the sliding process, thereby improving the stability and reliability of the sliding seat 21 during operation.

[0058] Optionally, refer to Figure 3The support plate 22 includes a support portion 221, a stop portion 222, and two connecting portions 223. The support portion 221 is rotatably mounted on the sliding seat 21 and is used to support the loading end 101 and the reinforcing piece 200 of the test specimen 100. The stop portion 222 is disposed on the support portion 221 and is used to stop the ends of the loading end 101 and the reinforcing piece 200. It can be understood that the stop portion 222 is disposed on the side of the support portion 221 near the base plate 1 to prevent the reinforcing piece 200 and the loading end 101 from sliding under their own weight. The two connecting portions 223 are spaced apart on the support portion 221 and are configured to connect with the fixing plate 31, while also providing a space for the loading end 101 and the reinforcing piece 200 to be placed.

[0059] Specifically, fastening holes are provided on both connecting parts 223, and fasteners 34 are respectively inserted through both ends of the fixing plate 31. The fasteners 34 are screwed into the corresponding fastening holes to achieve a detachable connection between the fixing plate 31 and the support plate 22. The operation is simple and convenient, the materials are readily available, and it has good stability. For example, the fasteners 34 are bolts.

[0060] Furthermore, continue to refer to Figure 3 The support structure 2 also includes a limiting component 27, as shown in the figure. Figure 4 The limiting component 27 includes a limiting plate 271 and a locking member 272. The limiting plate 271 is rotatably disposed on the supporting portion 221 and is used to abut against the loading end 101 and the reinforcing piece 200. The locking member 272 passes through the limiting plate 271 and the supporting portion 221 and is used to lock the limiting plate 271 to the supporting portion 221. In specific use, the limiting plate 271 abuts against the first end of the reinforcing piece 200 and the loading end 101, so that the second end of the reinforcing piece 200 and the loading end 101 simultaneously abuts against the connecting portion 223 close to the second end, thereby limiting the reinforcing piece 200 and the loading end 101 along the second horizontal direction and preventing the reinforcing piece 200 and the loading end 101 from moving along the second horizontal direction.

[0061] Specifically, the locking element 272 is a bolt, which passes through the limiting plate 271 and is threaded onto the support part 221. When it is necessary to lock the limiting plate 271, simply tighten the bolt; the operation is simple and convenient.

[0062] Furthermore, the outer periphery of the limiting plate 271 is arc-shaped. This arc-shaped profile allows for the generation of significant friction with relatively small clamping force, effectively preventing the reinforcing plate 200 and the loading end 101 from shifting. Simultaneously, as the rotating component gradually rotates to contact the reinforcing plate 200 and the loading end 101, the arc-shaped profile also acts as a guide, causing the reinforcing plate 200 and the loading end 101 to move along the arc surface to their final stable position. Specifically, the limiting plate 271 is an outwardly convex arc-shaped plate 26.

[0063] Optionally, such as Figure 3 and Figure 4 As shown, the support structure 2 also includes a rotating shaft 23, an adjusting shaft 24, and a fixing pin 25. Both the rotating shaft 23 and the adjusting shaft 24 extend along a second horizontal direction. The rotating shaft 23 is mounted on the support plate 22 and rotatably mounted on the sliding seat 21. An arc-shaped through hole 211 is provided on the sliding seat 21. The adjusting shaft 24 is movably inserted into the arc-shaped through hole 211. An arc-shaped plate 26 is provided within the arc-shaped through hole 211. Multiple limiting holes 261 are spaced apart on the portion of the arc-shaped plate 26 extending out of the arc-shaped through hole 211. The fixing pin 25 passes sequentially through the adjusting shaft 24 and any one of the limiting holes 261. Operators can rationally select the limiting holes 261 through which the fixing pin 25 should pass according to the bending angle of the test piece 100 to adapt to test pieces 100 with different bending angles. Specifically, both the rotating shaft 23 and the adjusting shaft 24 pass through the support portion 221.

[0064] For example, in this embodiment, the arc plate 26 is provided with three limiting holes 261 spaced apart, and the three limiting holes 261 are respectively suitable for test pieces 100 with bending angles of 60°, 90° and 120°.

[0065] Optionally, refer to Figure 3 The pressing structure 3 also includes a push rod 33, which is adjustablely inserted through the fixed plate 31. The first end of the push rod 33 is connected to the pressing plate 32. Moving the second end of the push rod 33 can drive the pressing plate 32 to gradually approach and abut against the reinforcing plate 200, making the operation simple and convenient.

[0066] Furthermore, multiple push rods 33 are provided, spaced apart along the second horizontal direction, to evenly abut the pressing plate 32 against the reinforcing plate 200, ensuring accurate contact between the reinforcing plate 200 and the loading end 101. Specifically, the push rods 33 are bolts commonly used in the art. The push member is screwed onto the fixing plate 31. By screwing the push member, the pressing plate 32 can be driven to abut against the reinforcing plate 200. At the same time, after the pressing plate 32 abuts against the reinforcing plate 200, the push member automatically locks onto the fixing plate 31, thereby ensuring that the pressing plate 32 stably abuts against the reinforcing plate 200. Moreover, by calibrating the correspondence between the axial force of the push member and the pressure applied to the pressing plate 32, the pressure value applied to the pressing plate 32 can be set.

[0067] For example, in this embodiment, three push rods 33 are provided; in other embodiments, the number of push rods 33 can be set as needed, and no specific limitation is made here.

[0068] Specifically, the second end of the push rod 33 is provided with an operating part 331 to facilitate the operation of the push rod 33 by the operator. In this embodiment, the operating part 331 is an operating rod protruding from the outer periphery of the push member.

[0069] More specifically, the jacking component is equipped with a spring structure to prevent it from becoming loose. The spring structure is a conventional existing structure, and its specific structure and principle are based on existing technology and will not be elaborated upon here.

[0070] For example, the usage process of the reinforcing sheet bonding fixture for the four-point bending composite test specimen of the curved beam provided in this embodiment is as follows:

[0071] Place the base plate 1 on the support foundation. According to the bending angle of the test piece 100, rotate and adjust the two support plates 22 around the second horizontal direction so that the included angle between the two support plates 22 matches the included angle α between the two loading ends 101 of the test piece 100. Insert the fixing pin 25 into the adjusting shaft 24 and the corresponding limiting hole 261 to ensure the stability of the support plate 22.

[0072] Next, according to the size of the test piece 100, slide the two sliding seats 21 along the first horizontal direction to make the distance between the two sliding seats 21 match the size of the test piece 100. Then, tighten the locking part 12 to lock the limiting part in the guide groove 11 to ensure the stability of the sliding seat 21.

[0073] The reinforcing sheet 200, adhesive, test piece 100, adhesive film, and reinforcing sheet 200 are placed sequentially on the support plate 22. The limiting plate 271 is rotated to limit the loading end 101 of the reinforcing sheet 200 and the test piece 100 along the second horizontal direction, and the locking piece 272 is screwed on to prevent the reinforcing sheet 200 and the test piece 100 from moving along the second horizontal direction.

[0074] Then, use fastener 34 to install and fix the fixing plate 31 onto the connecting part 223 of the support plate 22, and turn the push rod 33 to drive the pressing plate 32 to gradually approach and abut against the reinforcing plate 200, ensuring that the reinforcing plate 200 and the loading end 101 are tightly fitted.

[0075] Finally, the fixed test piece 100, reinforcing sheet 200, and tooling are placed in an oven for heating and curing to melt the adhesive and film, thereby bonding the reinforcing sheet 200 to the loading end 101 of the test piece 100.

[0076] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A bonding fixture for reinforcing sheets of a four-point bending composite test specimen of a curved beam, characterized in that, include: The base plate (1) is set on the supporting foundation; Two support structures (2) are spaced apart on the base plate (1), and the spacing between the two support structures (2) is adjustable; The support structure (2) includes a sliding seat (21) and a support plate (22). The sliding seat (21) is slidably disposed on the base plate (1) along a first horizontal direction, and the support plate (22) is rotatably disposed on the sliding seat (21) around a second horizontal direction. The two loading ends (101) of the test piece (100) abut against the two support plates (22) in a corresponding manner. The first horizontal direction is perpendicular to the second horizontal direction. Two pressing structures (3) are provided corresponding to the two supporting structures (2); The pressing structure (3) includes a fixing plate (31) and a pressing plate (32). The fixing plate (31) is disposed on the corresponding support plate (22). The pressing plate (32) is disposed on the fixing plate (31) in an adjustable position. The fixing plate (31) is configured to abut against the reinforcing sheet (200) to bond the reinforcing sheet (200) to the loading end (101).

2. The tooling according to claim 1, characterized in that, The support structure (2) also includes: A rotating shaft (23) extends along the second horizontal direction, the rotating shaft (23) is disposed on the support plate (22) and rotatably disposed on the sliding seat (21); An adjusting shaft (24) extends along the second horizontal direction. An arc-shaped through hole (211) is provided on the sliding seat (21). The adjusting shaft (24) is movably inserted into the arc-shaped through hole (211). The fixing pin (25) is provided with an arc plate (26) inside the arc-shaped through hole (211). The portion of the arc plate (26) extending out of the arc-shaped through hole (211) is provided with a plurality of limiting holes (261) at intervals. The fixing pin (25) passes through the adjusting shaft (24) and any of the limiting holes (261) in sequence.

3. The tooling according to claim 1, characterized in that, The support plate (22) includes: The support part (221) is rotatably disposed on the sliding seat (21) and is used to support the loading end (101) of the test piece (100); A stop (222) is provided on the support (221) for stopping the loading end (101) and the end of the reinforcing piece (200); Two connecting parts (223) are spaced apart on the supporting part (221) and are configured to connect with the fixing plate (31).

4. The tooling according to claim 3, characterized in that, The support structure (2) further includes a limiting component (27), the limiting component (27) comprising: A limiting plate (271) is rotatably disposed on the supporting part (221) for abutting against the loading end (101) and the reinforcing piece (200); A locking member (272) is provided on the limiting plate (271) and the supporting part (221) to lock the limiting plate (271) to the supporting part (221).

5. The tooling according to claim 4, characterized in that, The outer periphery of the limiting plate (271) is arc-shaped.

6. The tooling according to claim 1, characterized in that, The pressing structure (3) also includes a push rod (33), which is adjustablely inserted through the fixed plate (31). The first end of the push rod (33) is connected to the pressing plate (32). Moving the second end of the push rod (33) can drive the pressing plate (32) to gradually approach and abut against the reinforcing plate (200).

7. The tooling according to claim 6, characterized in that, Multiple push rods (33) are provided, and the multiple push rods (33) are spaced apart along the second horizontal direction.

8. The tooling according to claim 6, characterized in that, An operating part (331) is provided at the second end of the push rod (33).

9. The tooling according to claim 1, characterized in that, The base plate (1) is provided with a guide groove (11) which extends along the first horizontal direction. The bottom side of the sliding seat (21) is provided with a sliding part, which is slidably disposed in the guide groove (11) and can be locked in the guide groove (11).

10. The tooling according to claim 9, characterized in that, The cross-section of the guide groove (11) is inverted T-shaped.

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