CN219265970U

CN219265970U - Threaded rod piece shearing performance testing device

Info

Publication number: CN219265970U
Application number: CN202320114030.XU
Authority: CN
Inventors: 吴贵根; 姜起东; 张宇飞; 王太海; 陈光跃
Original assignee: Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2023-01-13
Filing date: 2023-01-13
Publication date: 2023-06-27
Anticipated expiration: 2033-01-13

Abstract

The utility model relates to a device for testing the shearing performance of a threaded rod, which belongs to the technical field of automobile fastener testing and comprises two positioning components which are respectively arranged on an upper chuck and a lower chuck of a tensile testing machine, wherein a plurality of shearing modules which are mutually staggered and connected are arranged between the two positioning components, transverse mounting holes are arranged on the shearing modules, and the threaded rod to be tested is arranged in the transverse mounting holes.

Description

Threaded rod piece shearing performance testing device

Technical Field

The utility model relates to the technical field of automobile fastener testing, in particular to a device for testing shearing performance of a threaded rod piece.

Background

Threaded bars are very widely used automotive fasteners. The connecting and fastening of a plurality of parts are realized by matching with the threaded holes and the nuts respectively, so that the connecting and fastening device has many applications in systems such as bearing members, power assemblies, chassis and the like, and each passenger car is provided with thousands of threaded rod pieces with different sizes.

Technical requirements of the threaded rod piece include strength, hardness, chemical composition, metallographic structure and the like, and can be inspected through different test projects. In mechanical performance test, tensile strength detection is commonly used, two ends of a threaded rod piece are clamped and fixed through a tool, and axial tension load is applied by tension equipment to carry out detection. In practical applications, many threaded rods are subjected to shearing, bending, torsion, etc. of the clamped component in addition to axial stretching.

When the shearing performance test is carried out on the threaded rod piece, the threaded rod piece is often penetrated through a test tool with holes, the test tool is arranged on tension equipment, tension or compression load is applied to the tool, and the tested threaded rod piece is sheared to fracture. At present, the upper clamping head and the lower clamping head of most pulling force equipment are arranged in a centering way in the axial direction, and after the test fixture with holes and the threaded rod piece are combined, the stress direction is not centered and deviation occurs because the test fixture with holes has a certain thickness. And the threaded rod piece bears shearing force and simultaneously has the action of bending moment, so that the accuracy of the detection effect is influenced.

For example, the patent with publication number CN113484165a discloses a method for testing shear mechanical properties of composite materials with high efficiency, when testing mechanical properties, a standard test piece is placed between an upper chuck and a lower chuck by adjusting a tension rod, the upper chuck and the lower chuck, and then the standard test piece is slowly loaded by a control system. When the shear mechanical test is carried out, the stress direction is still not centered, and the test piece is subjected to the shearing force and simultaneously has the bending moment effect, so that the reliability of the test result is affected.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a device for testing the shearing performance of a threaded rod piece, which has the advantages of simple structure and strong universality, is suitable for fixing, clamping and shearing tests of threaded rod pieces with various specifications, can ensure that the threaded rod piece only bears shearing stress, avoids the influence of bending moment, and can ensure the reliability of detection results.

In order to achieve the above purpose, the technical scheme adopted by the utility model for solving the technical problems is as follows: the device for testing the shearing performance of the threaded rod comprises two positioning assemblies which are respectively arranged on an upper chuck and a lower chuck of the tensile testing machine, wherein a plurality of shearing modules which are mutually staggered and connected are arranged between the two positioning assemblies, a plurality of transverse mounting holes are formed in the shearing modules, and the threaded rod to be detected is arranged in the transverse mounting holes.

The positioning assembly comprises a mounting block I, a mounting block II and a double-headed screw rod connected between the mounting block II, wherein the mounting block I is detachably connected with the upper chuck or the lower chuck, and one or more shearing modules are mounted on the mounting block II.

One end of the mounting block II is provided with one or more mounting grooves, and the mounting grooves are slidably connected with the shearing module.

The shearing module comprises a rectangular block, and one end of the rectangular block is provided with a positioning section in sliding fit with the mounting groove.

The mounting groove is arranged as a dovetail groove or a T-shaped groove.

The shearing modules are mutually attached and staggered, a plurality of through holes communicated with each other are formed in the shearing modules, and a plurality of opposite through holes form the transverse mounting holes.

The plurality of shearing modules are symmetrically arranged by taking the central lines of the two positioning assemblies as symmetrical axes.

And limit nuts are respectively arranged at the two ends of the threaded rod piece extending out of the transverse mounting hole.

The beneficial effects of the utility model are as follows:

according to the utility model, the two positioning components are respectively connected with the upper chuck and the lower chuck of the tensile testing machine, the plurality of shearing modules which are mutually staggered and connected are arranged between the two positioning components, the tested threaded rod piece passes through the transverse mounting holes on the plurality of shearing modules, the pure axial shearing of the tested threaded rod piece is realized through the tensile action of the tensile testing machine, the influence of bending moment is avoided, and the positioning components are detachably connected with the shearing modules, so that the shearing modules are convenient to assemble and disassemble, the shearing modules matched with the tested threaded rod piece can be selected according to the size of the tested threaded rod piece, and the testing universality is improved.

Drawings

The contents of the drawings and the marks in the drawings of the present specification are briefly described as follows:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of the mounting block II in FIG. 1;

FIG. 3 is a schematic view of the shear module of FIG. 1;

the labels in the above figures are: 1. positioning assembly, mounting blocks I and 12, mounting blocks II and 121, mounting grooves, 13, double-ended screws, 2, shearing modules, 21, rectangular blocks, 22, positioning sections, 23, through holes and 3, transverse mounting holes.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The specific embodiments of the utility model are as follows: as shown in fig. 1, the utility model provides a device for testing the shearing performance of a threaded rod, which comprises two positioning assemblies 1 respectively arranged on an upper chuck and a lower chuck of a tensile testing machine, wherein a plurality of shearing modules 2 which are mutually connected in a staggered manner are arranged between the two positioning assemblies 1, transverse mounting holes 3 are arranged on the shearing modules 2, and the threaded rod to be tested is arranged in the transverse mounting holes 3. The tensile testing machine acts, and the two positioning assemblies 1 drive the plurality of shearing modules 2 to conduct tensile action on the threaded rod piece, so that the pure axial shearing of the tested threaded rod piece can be achieved, the influence of bending moment is avoided, and the reliability of a testing result is ensured. And wherein shearing module 2 installs on locating component 1, makes shearing module 2 easy dismounting, can select shearing module 2 that matches with it according to the size of the screw rod piece that is surveyed, has improved the commonality of test.

Specifically, the positioning assembly 1 comprises a mounting block I11, a mounting block II 12 and a double-ended screw rod 13 connected between the mounting block I11 and the upper chuck or the lower chuck through bolts, one or more shearing modules 2 are mounted on the mounting block II 12, n shearing modules 2 can be mounted on one mounting block II 12, n+1 shearing modules 2 are mounted on the other mounting block II 12, 2n+1 (odd number) shearing modules 2 are arranged between the two positioning assemblies 1 in a staggered mode, the plurality of shearing modules 2 are symmetrically arranged by taking the central lines of the two positioning assemblies 1 as symmetrical axes, the central line of one shearing module 2 in the middle coincides with the axis of the double-ended screw rod 13, and the pure axial shearing of a tested threaded rod piece is further guaranteed, and the influence of bending moment is avoided.

As shown in fig. 2 and fig. 3, one end of the installation block ii 12 is provided with one or more installation grooves 121, the installation grooves 121 are slidably connected with the shearing module 2, the shearing module 2 includes a rectangular block 21, one end of the rectangular block 21 is provided with a positioning section 22 slidably matched with the installation groove 121, in order to prevent the shearing module 2 from falling out of the installation groove 121, the installation groove 121 is provided with a dovetail groove or a T-shaped groove, and the positioning section 22 on the shearing module 2 is matched with the installation groove 121, so that the installation and the disassembly of the shearing module 2 are facilitated.

The shearing modules 2 are mutually attached and arranged in a staggered mode, through holes 23 communicated with each other are formed in the shearing modules 2, the opposite through holes 23 form transverse mounting holes 3, the shearing modules 2 with the through holes 23 with corresponding pore sizes can be selected according to the sizes of the threaded rod pieces to be tested and are mounted on the mounting block II 12, and testing universality is improved. And the limit nuts are respectively arranged at the two ends of the threaded rod piece to be tested, which extend out of the transverse mounting hole 3, so that the threaded rod piece is prevented from axially moving to be separated from the transverse mounting hole 3 in the shearing test process, and the smooth test is ensured.

The working principle of the testing device is as follows: firstly, two mounting blocks I11 are respectively mounted on an upper chuck and a lower chuck, a double-headed screw 13 is respectively mounted on the two mounting blocks I11, a mounting block II 12 is mounted at the other end of the two double-headed screws 13, mounting grooves 121 on the two mounting blocks II 12 are staggered and opposite, and a shearing module 2 is mounted in the mounting grooves 121 on the two mounting blocks II 12; then, starting a tensile testing machine to enable a plurality of shearing modules 2 to be arranged in a staggered mode, enabling through holes in the shearing modules to form transverse mounting holes 3 oppositely, mounting a threaded rod piece to be tested in the transverse mounting holes 3, and mounting limit nuts at two ends or one end of the threaded rod piece; finally, the tensile testing machine is started, the distance between the upper clamping head and the lower clamping head is gradually increased, the threaded rod piece is sheared in a pure axial direction under the action of the shearing modules 2 until the threaded rod piece is broken, and the maximum shearing force born by the tensile testing machine can be displayed.

In summary, the utility model has simple structure and strong universality, is suitable for fixing, clamping and shearing test of the threaded rod pieces with various specifications, ensures that the threaded rod pieces bear shearing stress only, avoids the influence of bending moment, and ensures the reliability of detection results.

The foregoing is provided by way of illustration of the principles of the present utility model, and is not intended to be limited to the specific constructions and applications illustrated herein, but rather to all modifications and equivalents which may be utilized as fall within the scope of the utility model as defined in the claims.

Claims

1. The utility model provides a screw rod piece shearing performance testing arrangement, its characterized in that includes two locating component that install respectively on tensile testing machine's upper chuck and lower chuck, installs a plurality of shearing modules that link to each other crisscross each other between two locating component, and is a plurality of be provided with horizontal mounting hole on the shearing module, install the screw rod piece that waits to detect in the horizontal mounting hole.

2. The threaded rod shearing performance testing apparatus according to claim 1, wherein: the positioning assembly comprises a mounting block I, a mounting block II and a double-headed screw rod connected between the mounting block II, wherein the mounting block I is detachably connected with the upper chuck or the lower chuck, and one or more shearing modules are mounted on the mounting block II.

3. The threaded rod shearing performance testing apparatus according to claim 2, wherein: one end of the mounting block II is provided with one or more mounting grooves, and the mounting grooves are slidably connected with the shearing module.

4. A threaded rod shear performance testing device according to claim 3, wherein: the shearing module comprises a rectangular block, and one end of the rectangular block is provided with a positioning section in sliding fit with the mounting groove.

5. A threaded rod shear performance testing device according to claim 3, wherein: the mounting groove is arranged as a dovetail groove or a T-shaped groove.

6. The threaded rod shearing performance testing apparatus according to claim 1, wherein: the shearing modules are mutually attached and staggered, a plurality of through holes communicated with each other are formed in the shearing modules, and a plurality of opposite through holes form the transverse mounting holes.

7. The threaded rod shearing performance testing apparatus according to claim 1, wherein: the plurality of shearing modules are symmetrically arranged by taking the central lines of the two positioning assemblies as symmetrical axes.

8. The threaded rod shearing performance testing apparatus according to claim 1, wherein: and limit nuts are respectively arranged at the two ends of the threaded rod piece extending out of the transverse mounting hole.