CN219417002U

CN219417002U - Bending test fixture

Info

Publication number: CN219417002U
Application number: CN202320365306.1U
Authority: CN
Inventors: 宋佳; 王旭; 王帅; 秦坤伦; 张海; 张波
Original assignee: Weiqiao Suzhou Lightweight Research Institute Co ltd
Current assignee: Weiqiao Suzhou Lightweight Research Institute Co ltd
Priority date: 2023-03-02
Filing date: 2023-03-02
Publication date: 2023-07-25
Anticipated expiration: 2033-03-02

Abstract

The utility model discloses a bending test fixture, which comprises: a base; the positioning block is arranged on the base, and a supporting part is formed on the positioning block; the locking component is arranged on the base and is used for fixing materials; the rolling assembly is rotatably arranged on the base and comprises a pushing piece, and the pushing piece rolls materials under the rotation of the rolling assembly, so that the materials are bent by taking the supporting part as a fulcrum. According to the bending test fixture, through the design of the base, the locking component, the bending component and the positioning block, the pushing and pressing piece of the bending component moves relative to the supporting part of the positioning block in a non-contact mode, and the pushing and pressing piece moves circumferentially around the supporting part. On one hand, the fixing and the dismantling of materials are convenient; on the other hand, when the supporting part is frequently replaced to determine the ratio of the radius of the supporting part to the thickness of the material, the positioning block is only required to be disassembled and replaced, so that the testing efficiency is improved.

Description

Bending test fixture

Technical Field

The utility model relates to the field of material riveting property testing, in particular to a bending test fixture.

Background

The light weight process of the automobile industry has prompted the application of various light weight alloys and their mixed use with steel or high strength steel, and the connection technology is also being upgraded. Self-piercing riveting is widely used in the joining of steel-aluminum and aluminum-aluminum components with its strong joint properties, stable quality, high automation and pollution-free processes. The self-piercing riveting is a connecting process that rivets are deformed and extended in a bottom layer material by penetrating an upper layer material and a middle layer material under the action of external force to form a mutual embedded structure, and the plasticity requirement on a plate to be processed, particularly a lower plate, is high.

Determining whether a group of materials can be riveted by self-punching (the self-punching riveting property is that a special riveting die is not required to be specially designed when the lower plate to be riveted is subjected to the self-punching riveting SPR process, and the materials have no failure characteristics such as cracks, divergent cracks and micro cracks after riveting) or the performance after riveting is good or bad, wherein a plurality of factors are included, including the selection of rivets and riveting dies, the selection of materials, the thickness and the like of upper and lower connecting pieces. Regarding whether the lower plate is not cracked after self-punching riveting, the lower plate is acknowledged to be limited by the elongation of the material, and a plurality of heat treatment methods are proposed to improve the elongation, so that the conventional device for testing the bending property of the material has the problems of complex structure and high operation difficulty.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

Disclosure of Invention

The utility model aims to provide a bending test fixture which can test the bending property of a material and is simple to operate.

To achieve the above object, an embodiment of the present utility model provides a bending test fixture, including: the device comprises a base, a positioning block, a locking assembly and a roll bending assembly;

the positioning block is arranged on the base, and a supporting part is formed on the positioning block; the locking component is arranged on the base and used for fixing materials; the roll bending assembly is rotatably arranged on the base and comprises a pushing piece, and the pushing piece rolls materials under the rotation of the roll bending assembly, so that the materials are bent by taking the supporting part as a fulcrum.

In one or more embodiments of the present utility model, the roll bending assembly includes a movable bracket rotatably mounted on the base, and an adjusting assembly mounted on the movable bracket, the pushing member being mounted on the adjusting assembly, the adjusting assembly being configured to adjust a distance between the pushing member and the material.

In one or more embodiments of the present utility model, the adjusting assembly includes a first locking member and a mounting frame mounted in a mating manner, the first locking member is in threaded connection with the movable bracket, the pushing member is mounted on the mounting frame, and the first locking member is used for pushing and pulling the mounting frame and the pushing member.

In one or more embodiments of the utility model, the adjustment assembly further comprises a securing assembly mounted to the movable bracket, the securing assembly for securing the adjustment assembly.

In one or more embodiments of the utility model, the fixed assembly includes a first locking portion and a second locking portion mounted on the movable bracket for clamping the fixed adjustment assembly.

In one or more embodiments of the present utility model, the base is provided with a height-adjustable positioning rod, and the positioning rod is used for limiting the bending assembly when bending the material.

In one or more embodiments of the present utility model, the locking assembly includes a fixing member and a second locking member screwed with the base, the positioning block has a side wall, the side wall is used for placing the material between the side wall and the fixing member, and the second locking member is used for pushing the fixing member and cooperating with the side wall to fix the material.

In one or more embodiments of the utility model, the support is rounded and/or the roll-bending assembly is rotatably mounted to the base by a connecting pin.

In one or more embodiments of the present utility model, the support portion is a rounded chamfer, the roll bending assembly is rotatably mounted with the base by a connecting pin, and the support portion is coaxially disposed with the connecting pin.

In one or more embodiments of the utility model, the roll bending test fixture further comprises a test platform on which the base is mounted, the test platform having a support mounted thereon for supporting the roll bending assembly.

Compared with the prior art, according to the bending test fixture provided by the embodiment of the utility model, through the design of the base, the locking component, the bending component and the positioning block, the pushing and pressing component of the bending component moves relative to the supporting part of the positioning block in a non-contact mode, and the pushing and pressing component moves circularly around the supporting part. On one hand, the fixing and the dismantling of materials are convenient; on the other hand, when the supporting part is frequently replaced to determine the ratio of the radius of the supporting part to the thickness of the material, only the replacement positioning block is required to be disassembled, so that the test efficiency is improved, and the ratio of the radius of the supporting part corresponding to a certain plate-shaped aluminum alloy material to the thickness of the certain plate-shaped aluminum alloy material is rapidly obtained to determine whether the material is suitable for self-piercing riveting. The influence of the performance of the dual plate, the rivet and the riveting die and the riveting process on the whole process when the plate material and the dual plate are self-punched and riveted together is avoided; the test fixture will be an important test tool for directly quantifying whether the metal blank is suitable for self-piercing riveting.

Drawings

Fig. 1 is a schematic structural view of a roll bending test fixture according to an embodiment of the present utility model.

Fig. 2 is a schematic structural view of a bending test fixture according to another view angle of an embodiment of the present utility model.

Detailed Description

Specific embodiments of the utility model will be described in detail below with reference to the drawings, but it should be understood that the scope of the utility model is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.

As shown in fig. 1 and 2, a roll bending test fixture includes: base 10, locating piece 20, locking subassembly and roll bending subassembly.

In this embodiment, the base 10 has a basket structure with a closed bottom and an open top, and specifically, the base 10 includes a bottom wall and four side walls disposed around the bottom wall, and two opposite side walls are each formed with a protrusion 11. In other embodiments, the base 10 may be other shapes.

As shown in fig. 2, the positioning block 20 is mounted on the base 10, in this embodiment, the positioning block 20 is mounted on the bottom wall of the base 10, and in one embodiment, the positioning block 20 is fixed in an L shape.

A plurality of fixing holes 21 for fixing the positioning block 20 on the bottom wall are formed in the transverse connection portion of the positioning block 20. The bottom wall of the base 10 is provided with a plurality of positioning holes, and the positioning holes are matched with mounting pieces such as positioning pins, screws and the like, and the positioning block 20 is fixed on the base 10 through the fixing holes 21. In this embodiment, six fixing holes 21 are provided to ensure that the positioning block 20 does not displace and deform in a certain force bearing state.

The upper part of the longitudinal connecting part of the positioning block 20 is wedge-shaped, the wall surface of one side wall 22 of the longitudinal connecting part of the positioning block 20 is a plane perpendicular to the bottom wall of the base 10, the upper part of the other side wall 23 of the longitudinal connecting part of the positioning block 20 is a wedge-shaped inclined plane, and the lower part is a plane which is connected with the bottom of the inclined plane and perpendicular to the bottom wall of the base 10. The top of the longitudinal connecting portion of the positioning block 20 is formed with a supporting portion 24, the supporting portion 24 is a round chamfer, and two parallel straight sides of the supporting portion 24 are respectively connected with and tangent to the tops of the side wall 22 (plane) and the side wall 23 (inclined plane).

As shown in fig. 1, a locking assembly is mounted to the base 10 for securing the material 10'. In this embodiment, the material 10' is a plate-shaped aluminum alloy including an aluminum extruded profile, an aluminum rolled sheet, a cast aluminum/extruded cast aluminum/high pressure cast aluminum plate-shaped material, and the thickness t is generally 0.5mm to 5mm.

In this embodiment, the locking assembly includes a fixing member 31 and a second locking member 32 threadedly coupled to the base 10. The fixing member 31 is disposed on a side close to the side wall 22, the fixing member 31 is plate-shaped, and the second locking member 32 is a screw or a threaded member. The second locking member 32 is screwed to a side wall of the base 10, which is connected to both side walls formed with the protruding portion 11, and the fixing member 31 may be fitted to an end portion of the second locking member 32 by a bearing, a bush, or the like, or may be simply abutted. The material 10 'is placed between the side wall 22 of the positioning block 20 and the fixing piece 31, the second locking piece 32 is screwed, so that the second locking piece 32 rotates to push the fixing piece 31, then the fixing piece 31 pushes the material 10', the material 10 'is tightly attached to the side wall 22 of the positioning block 20, the purpose that the fixing piece 31 and the positioning block 20 fix the lower end of the material 10' is finally achieved, and therefore the lower part of the material 10 'is in a fixed static state when the upper end of the material 10' is stressed.

In one embodiment, a guide groove is formed on the bottom wall of the base 10, and the bottom of the fixing member 31 is inserted into the guide groove and can move along the guide groove, preventing the fixing member 31 from deviating from a predetermined direction during movement. In another embodiment, the bottom of the fixing member 31 may be bent to form a bent portion inserted into the guide groove, thereby increasing the stability of the movement of the fixing member 31.

As shown in fig. 1, a roll bending assembly is rotatably installed with the base 10 by a connection pin 50, and the roll bending assembly includes a movable bracket 41, an adjusting assembly, and a pressing member 43. The movable support 41 is rotatably mounted on the base 10 through the connecting pin 50, the adjusting component is mounted on the movable support 41, the pushing component 43 is mounted on the adjusting component, the adjusting component is used for adjusting the distance between the pushing component 43 and the material 10', and the pushing component 43 rolls the material 10' under the rotation of the roll bending component, so that the material 10' bends by taking the supporting part as a fulcrum. In other embodiments, the roll bending assembly may be rotatably mounted with the base 10 in other ways.

In this embodiment, the movable bracket 41 has a front fork shape, that is, the movable bracket 41 includes a holding portion (handle) 411 and two first extending portions 412 connected to the holding portion 411, a cross beam 413 is connected between the two first extending portions 412, and the two first extending portions 412 and the two protruding portions 11 are rotatably mounted through connecting pins 50. The bending assembly is enabled to perform a central rotational movement about the central axes of the two connection pins 50 by the connection pins 50. In other embodiments, the movable bracket 41 may be other shapes.

In this embodiment, the supporting portion 24 and the connecting pin 50 are coaxially disposed, so that when the pushing member 43 performs a circular motion around the supporting portion 24, only a pulling pressure is generated on the upper and lower surfaces of the material 10', and no extrusion force is generated on the material 10' in thickness, thereby avoiding damage to the material 10' caused by the clamp during testing.

In this embodiment, the adjustment assembly includes a cooperatively mounted first locking member 421 and a mounting bracket 422. The first locking member 421 is in threaded connection with the movable support 41, the pushing member 43 is mounted on the mounting frame 422, the pushing member 43 can be fixedly mounted on the mounting frame 422, and the pushing member 43 can also be rotatably mounted on the mounting frame 422. The first locking member 421 serves to push and pull the mounting frame 422 and the pushing member 43 back to the original position.

The first locking member 421 may be a screw, a stud, or other threaded member, and the cross member 413 is provided with a threaded hole in threaded connection with the first locking member 421. The mounting frame 422 includes a cross bar 4221 and two second extending portions 4222 connected to the cross bar 4221, and the pushing member 43 is installed between the two second extending portions 4222, where the cross bar 4221 and the first locking member 421 may be only abutted, or may be rotatably connected by a bearing or a sleeve, etc. The first locking member 421 is rotated to push the cross bar 4221, which in turn pushes the entire mounting frame 422. The first locking member 421 adjusts the distance between the pushing member 43 and the positioning block 20, so that the materials 10 'with different thicknesses can be fixed, and the materials 10' are tightly attached to the supporting portion 24 when rolled. In other embodiments, the mounting bracket 422 may be other structures for mounting the biasing element 43.

In the present embodiment, the pushing member 43 is a roller shaft. Both ends of the pushing piece 43 may be rotatably mounted with the two second extension portions 4222 by bearings, bushings, or the like. Both ends of the pushing member 43 may be fixedly mounted with the two second extension portions 4222. Preferably, both ends of the pressing member 43 are rotatably mounted with the two second extension portions 4222.

As shown in fig. 1 and 2, the adjusting assembly further includes a fixing assembly mounted on the movable bracket 41, and the fixing assembly is used for fixing the adjusting assembly. The fixed assembly includes a first locking portion 4231 and a second locking portion 4232 mounted on the movable bracket 41, the first locking portion 4231 and the second locking portion 4232 being for clamping the fixed adjustment assembly.

In this embodiment, two sets of fixing assemblies are provided corresponding to two first extending portions 412, and each set of fixing assemblies includes a first locking portion 4231 and a second locking portion 4232, where the first locking portion 4231 and the second locking portion 4232 are located on upper and lower sides of one first extending portion 412 respectively.

In addition, a guide rail for placing the first extension portion 412 is formed between the first locking portion 4231 and the second locking portion 4232, and in an initial state, the first locking portion 4231 and the second locking portion 4232 are in a loose state with the first extension portion 412, and when the first locking member 421 is screwed to push the mounting bracket 422, the two second extension portions 4222 move in the corresponding guide rails, and when the pushing member 43 is adjusted in place, the first locking portion 4231 and the second locking portion 4232 are fixed with the first extension portion 412, thereby clamping the second extension portion 4222 to fix the mounting bracket 422.

As shown in fig. 1 and 2, the base 10 is provided with a positioning rod 60 with an adjustable height, and the positioning rod 60 is used for limiting the bending assembly when bending the material 10'.

The positioning rod 60 is mounted on the side wall of the base 10, a slot for mounting the positioning rod 60 is formed in the side wall, and the side wall on which the positioning rod 60 is mounted is opposite to the side wall on which the second locking member 32 is mounted; the height adjustment can be realized through the positioning rods 60 with different sections and the slots with different sections, such as the section, the depth and the like, the height adjustment can be also realized through controlling the depth of the positioning rods 60 inserted into the slots through threaded connection (other modes can also be adopted), and the height adjustment can also be realized through the expansion and contraction of the positioning rods 60.

As shown in fig. 1, in this embodiment, the bending test fixture further includes a test platform 70, the base 10 is mounted on the test platform 70, a plurality of mounting holes are formed on the bottom wall of the base 10, and the base 10 is mounted on the test platform 70 by matching with fixing members such as screws and bolts through the mounting holes.

The test platform 70 is provided with a support member 80, the support member 80 is opposite to the positioning rod 60, and the support member 80 is used for supporting a bending assembly which does not rotate to bend the material. Specifically, the supporting member 80 is used for supporting the holding portion 411, and the supporting member 80 is installed on the test platform 70 in an inverted L shape. In other embodiments, support 80 may also be mounted on top of the side wall to which second retaining member 32 is mounted.

In the initial state, the holding portion 411 is placed on the supporting member 80, the material 10 'is placed between the fixing member 31 and the side wall 22 of the positioning block 20, and the second locking member 32 is screwed, so that the second locking member 32 rotates to push the fixing member 31, and the fixing member 31 and the positioning block 20 fix the lower end of the material 10'.

After the lower end of the material 10 'is fixed, the first locking member 421 is screwed, so that the first locking member 421 is rotated to push the pushing member 43, so that the pushing member 43 contacts the material 10', and the mounting frame 422 is fixed by the fixing assembly to fix the pushing member 43. The movable bracket 41 is rotated, so that the pushing piece 43 rolls the upper end of the material 10', the material 10' bends by taking the supporting part 24 as a fulcrum, different bending angles are obtained according to the rotating angle, and different and more accurate bending angles are obtained by adjusting the height of the positioning rod 60 to limit.

In the present embodiment, the pushing member 43 rotates around the axis of the connecting pin 50 as the center of a circle, and the axis of the connecting pin 50 is also the center of a circle of the supporting portion 24. The pushing member 43 performs a circular motion with a fixed radius, the radius of the circular motion being l=r+t, r being the radius of the supporting portion 24, t being the thickness of the material 10'. Although the pushing piece 43 is not in direct contact with the supporting part 24, through design processing, the utility model ensures that the pushing piece 43 moves circumferentially around the fixed radius of the supporting part 24 when the holding part 411 is pulled, the pushing piece 43 rolls the surface of the material 10', so that the surface of the material 10' is attached to the supporting part 24 and rolls around the axis of the supporting part 24, the bending radius of the material 10 'is r, and the roll bending angle of the material 10' can be larger than 90 degrees. In other embodiments, the angle at which the material 10' is rolled can also be less than or equal to 90 °.

It should be additionally noted that unless otherwise defined, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. As used in the present specification and claims, the terms "upper", "lower", "end", "side", and the like are used merely to denote relative positional relationships, which change when the absolute position of the object to be described changes.

The foregoing descriptions of specific exemplary embodiments of the present utility model are presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the utility model and its practical application to thereby enable one skilled in the art to make and utilize the utility model in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the claims and their equivalents.

Claims

1. A roll bending test fixture, comprising:

a base;

the positioning block is arranged on the base, and a supporting part is formed on the positioning block;

the locking assembly is arranged on the base and used for fixing materials; and

the roll bending assembly is rotatably arranged on the base and comprises a pushing piece, and the pushing piece rolls materials under the rotation of the roll bending assembly, so that the materials are bent by taking the supporting part as a fulcrum.

2. The roll bending test fixture of claim 1, wherein the roll bending assembly comprises a movable bracket rotatably mounted on the base and an adjustment assembly mounted on the movable bracket, the pushing member being mounted on the adjustment assembly, the adjustment assembly being configured to adjust a distance between the pushing member and the material.

3. The roll bending test fixture of claim 2, wherein the adjustment assembly comprises a first locking member and a mounting bracket mounted in a mating relationship, the first locking member being threadably coupled to the movable bracket, the pushing member being mounted to the mounting bracket, the first locking member being configured to push and pull the mounting bracket and the pushing member.

4. The roll bending test fixture of claim 2, wherein the adjustment assembly further comprises a securing assembly mounted to the movable bracket, the securing assembly for securing the adjustment assembly.

5. The roll bending test fixture of claim 4, wherein the fixed assembly includes first and second locking portions mounted on the movable bracket for clamping the fixed adjustment assembly.

6. The roll bending test fixture of claim 1, wherein the base is provided with a height-adjustable positioning rod for limiting the roll bending assembly when bending the material.

7. The roll bending test fixture of claim 1, wherein the locking assembly comprises a fixing member and a second locking member in threaded connection with the base, the positioning block has a side wall, the side wall and the fixing member are used for placing materials, and the second locking member is used for pushing the fixing member and matching with the side wall to fix the materials.

8. The roll bending test fixture of claim 1, wherein the support portion is rounded chamfer and/or the roll bending assembly is rotatably mounted to the base by a connecting pin.

9. The roll bending test fixture of claim 8, wherein the support portion is a rounded chamfer, the roll bending assembly is rotatably mounted to the base by a connecting pin, and the support portion is coaxially disposed with the connecting pin.

10. The roll bending test fixture of claim 1, further comprising a test platform, wherein the base is mounted on the test platform, and wherein the test platform has a support mounted thereon for supporting the roll bending assembly.