CN218725996U

CN218725996U - Clamp mechanism for pulling-out force experiment of pulling-riveting piece

Info

Publication number: CN218725996U
Application number: CN202222517052.9U
Authority: CN
Inventors: 田革
Original assignee: Shanghai Zhuyu Auto Parts Co ltd
Current assignee: Shanghai Zhuyu Auto Parts Co ltd
Priority date: 2022-09-22
Filing date: 2022-09-22
Publication date: 2023-03-24
Anticipated expiration: 2032-09-22

Abstract

The utility model relates to a fixture mechanism for a pulling-out force experiment of a pulling-riveting piece, which comprises a fixture main body with a rectangular cross section, wherein a through positioning hole is arranged on an upper baffle of the fixture main body, and a coaxial positioning sleeve is embedded in the positioning hole; a lower baffle plate of the clamp main body is provided with a lower clamping plate, and the lower clamping plate is clamped through external clamping equipment to fix the clamp mechanism; after the pulling and riveting of the pulling and riveting piece, the test piece is fixed between the flange plate of the pulling and riveting piece and the rod body deformation part; the rod body of the rivet part is positioned in the clamp main body, is vertical to the upper baffle and is coaxial with the positioning sleeve; the diameter of the flange plate is smaller than that of the positioning hole; the test piece is attached to the lower end face of the upper baffle; and measuring the pulling-out force of the rivet by using a force applied to the rivet rod body by a tensile machine and facing the axial direction of the rivet rod body. Use utility model's the data that anchor clamps mechanism experiment gained more reliable accurate, do not need many times to experiment. And materials can be saved, the cost is reduced, and the workload of related experimenters is reduced.

Description

Clamp mechanism for pulling-out force experiment of pulling-riveting piece

Technical Field

The application belongs to the field of clamp mechanisms, and particularly relates to a clamp mechanism for a pulling-out force experiment of a pulling-riveting piece.

Background

With the continuous high-speed development of the automobile manufacturing industry, the parts composing the automobile are in the trend of diversification and complication, and many parts need to be welded and riveted with various types of standard parts and delivered in a small assembly mode. This requires that the inspection frequency be set during actual production to experiment with some required data for the assembly.

The conventional measurement means for the rivet in the prior art is to clamp the test piece by a clamp in several directions and then apply a pulling force to the rivet until the rivet is pulled off. The size of the test piece, the thickness of the test piece and the strength of the test piece have great influence on the final experiment result, the test piece with a fixed size needs to be manually intercepted from a part assembly after riveting in each experiment and then clamped on a clamp, and even if the measured data in each experiment are inconsistent according to different operators.

Therefore, a clamp mechanism aiming at the pulling-out force test of the pulling rivet member, which can enable the test data to be more accurate and reliable and is convenient to clamp, is needed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a shortcoming among the above-mentioned prior art has been overcome to the purpose, provides one kind and enables that experimental data is accurate reliable more and the convenient anchor clamps mechanism to rivet piece pulling-out force experiment of clamping.

In order to achieve the above object, the present invention has the following constitutions:

the application relates to a clamp mechanism for a pulling-out force experiment of a pulling-riveting piece, which comprises a clamp main body with a rectangular cross section, wherein a through positioning hole is formed in an upper baffle plate of the clamp main body, and a coaxial positioning sleeve is embedded in the positioning hole;

the lower baffle plate of the clamp main body is provided with a lower clamping plate, and the lower clamping plate is clamped through external clamping equipment to fix the clamp mechanism;

after the pulling and riveting of the pulling and riveting piece, the test piece is fixed between the flange plate of the pulling and riveting piece and the rod body deformation part; the rod body of the rivet part is positioned in the clamp main body, is perpendicular to the upper baffle and is coaxial with the positioning sleeve; the diameter of the flange plate is smaller than that of the positioning hole; the test piece is attached to the lower end face of the upper baffle; and measuring the pulling-out force of the rivet by using a force applied to the rivet rod body by a tensile machine and facing the axial direction of the rivet rod body.

In a preferable clamp mechanism for a pulling-out force experiment of a pulling-riveting piece, the clamp main body comprises an upper baffle, a lower baffle, a left protection connecting plate and a right protection connecting plate, wherein the left protection connecting plate and the right protection connecting plate are fixedly connected with the upper baffle and the lower baffle;

the lower clamping plate comprises a fixing part and a clamping plate part, a hollow groove is formed in the lower baffle plate, the clamping plate part penetrates into the hollow groove downwards, and the fixing part is abutted against the upper end face of the lower baffle plate to realize limiting;

in the preferable fixture mechanism for the pulling-out force experiment of the pulling-riveting piece, the height of the lower clamping plate is higher than that of the left protective connecting plate and the right protective connecting plate.

In the preferred anchor clamps mechanism that is used for the rivet spare to pull out the power experiment, left side protection connecting plate and right protection connecting plate with overhead gage and lower baffle electric welding are connected.

In the preferable clamp mechanism for the pulling-out force experiment of the pulling-riveting piece, the positioning hole is coaxial with the central point of the empty groove.

In the preferable clamp mechanism for the pulling-out force experiment of the pulling-riveting piece, the clamping surface of the lower clamping plate is provided with transverse grains.

In an optimized fixture mechanism for a pulling-out force experiment of a pulling-riveting piece, the positioning sleeve is a rhombic taper positioning sleeve, and positioning is realized by abutting side lines of rhombic four corners of the positioning sleeve with the positioning holes.

In the preferable fixture mechanism for the pulling-out force experiment of the pulling-riveting piece, the positioning sleeve is made of rubber.

In an optimized fixture mechanism for a pulling-out force experiment of a pulling-riveting piece, the length of the butting between the rhombic four-corner side line of the positioning sleeve and the positioning hole is 3mm.

In a preferred fixture mechanism for the pulling-out force test of the blind rivet, the blind rivet is a blind rivet.

In a preferable clamp mechanism for a pulling-out force experiment of a pulling rivet piece, a screw part of the pulling rivet piece penetrates into a hole of the positioning sleeve, and a gap between the screw and the hole is 10 threads;

the clearance between the positioning sleeve and the positioning hole is 5 threads.

The fixture mechanism comprises a fixture main body with a rectangular cross section, wherein a through positioning hole is formed in an upper baffle of the fixture main body, and a coaxial positioning sleeve is embedded in the positioning hole; the lower baffle plate of the clamp main body is provided with a lower clamping plate, and the lower clamping plate is clamped through external clamping equipment to fix the clamp mechanism; after the pulling and riveting of the pulling and riveting piece, the test piece is fixed between the flange plate of the pulling and riveting piece and the rod body deformation part; the rod body of the rivet piece is positioned in the clamp main body, is vertical to the upper baffle and is coaxial with the positioning sleeve; the diameter of the flange plate is smaller than that of the positioning hole; the test piece is attached to the lower end face of the upper baffle; and measuring the pulling-out force of the rivet by using a force applied to the rivet rod body by a tensile machine and facing the axial direction of the rivet rod body. Use the utility model discloses a data that anchor clamps mechanism experiment gained are more reliable accurate, do not need many times to experiment. And materials can be saved, the cost is reduced, and the workload of related experimenters is reduced.

Drawings

FIG. 1 is a schematic cross-sectional view of a preferred blind rivet;

FIG. 2 is a perspective view of a preferred blind rivet;

FIG. 3 is a schematic front view of a preferred rivet and test strip assembly;

FIG. 4 is a schematic perspective view of a preferred assembly of a rivet and a test piece;

FIG. 5 is a schematic cross-sectional view of a preferred use case of the jig structure;

fig. 6 is a perspective view of an example of use of the preferred clip structure.

Description of the symbols:

a blind rivet 100; a flange plate 110; a rod body 120; a rod deforming portion 121; a test piece 200; a jig main body 300; an upper baffle 310; a positioning hole 311; a lower baffle 320; a left guard attachment plate 330; a right guard attachment plate 340; a positioning sleeve 400; a lower clamping plate 500; a clamp plate portion 510; a fixed portion 520.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without any creative effort also belong to the protection scope of the present invention.

As shown in fig. 5 and 6, the present application is a fixture mechanism for a pulling-out force experiment of a rivet member, which includes a fixture main body 300 with a rectangular cross section, a through positioning hole 311 is provided on an upper baffle 310 of the fixture main body 300, and a coaxial positioning sleeve 400 is embedded in the positioning hole 311;

the lower baffle 320 of the clamp body 300 is provided with a lower clamping plate 500, and the lower clamping plate 500 is clamped by an external clamping device to fix the clamp mechanism;

after the pulling rivet member 100 is pulled and riveted, the test piece 200 is fixed between the flange 110 of the pulling rivet member 100 and the rod deformation part 121; the rod body 120 of the rivet 100 is positioned inside the clamp body 300, perpendicular to the upper baffle 310, and coaxial with the positioning sleeve 400; the diameter of the flange plate 110 is smaller than that of the positioning hole 311; the test piece 200 is attached to the lower end surface of the upper baffle 310; and measuring the pulling-out force of the rivet by using a force applied to the rivet rod body by a tensile machine and facing the axial direction of the rivet rod body.

In the prior art, when the pulling-out force of the pulling rivet pulled out of an original test piece after the pulling rivet is finished is measured in an experiment, the test piece is clamped by a clamp in several directions and then the pulling force is applied to the pulling rivet until the pulling-out force is achieved. The size of the test piece, the thickness of the test piece and the strength of the test piece have great influence on the final experiment result, the test piece with a fixed size needs to be manually intercepted from a part assembly after riveting in each experiment and then clamped on a clamp, and even if the measured data in each experiment are inconsistent according to different operators.

The utility model discloses an anchor clamps mechanism is when using, test block 200 butt with the lower surface of last baffle 310 on, when the pulling force is exerted to rivet piece 100 to the pulling force of pulling force machine, body of rod deformation portion 121 exert pressure to test block 200, when the deformation portion is destroyed, then record this rivet piece 100 and draw the power of taking off.

Use the utility model discloses a fixture mechanism, nevertheless when chooseing for use the test block 200 of unidimensional, can not influence the experimental result, can not lead to the test result to produce the error because of test block 200 variation in size because of prior art.

Preferably, the rivet member 100 that the fixture mechanism of the present invention is suitable for is a rivet, and the structure thereof is as shown in fig. 1 and 2, the rivet includes a screw portion, a flange 110 and a rod 120, the first half of the rod 120 can be deformed to a compressed length, and the compressed length is outwardly protruded in the diameter direction, and the deformed shape shows a protruded circular ring. After deformation, as shown in fig. 3 and 4.

As shown in fig. 3 and 4, in order to fix the test piece 200, the test piece 200 is clamped and fixed by the flange 110 and the rod deformation portion of the rivet.

In another preferred embodiment, the rivet member 100 may be a rivet nut without a rivet, and the test piece 200 is clamped and fixed by the flange 110 and the rod deformation portion.

As shown in fig. 5 and 6, the clamp mechanism comprises a preferred clamp mechanism, which comprises a clamp body 300, a positioning sleeve 400 and a lower clamping plate 500.

The clamp body 300 comprises the upper baffle 310, the lower baffle 320, a left protective connecting plate 330 and a right protective connecting plate 340, which are fixedly connected with the upper baffle 310 and the lower baffle 320; left side protection connecting plate 330 and right protection connecting plate 340 when connecting need not align with overhead gage 310 and the both sides terminal surface of baffle 320 down, all can realize that left protection connecting plate 330 and right protection connecting plate 340 are fixed in the overhead gage 310 down the terminal surface and the mounted position of baffle 320 up end down all belong to the utility model discloses a protection scope.

In a preferred embodiment, the left and right

shielding connecting plates

330 and 340 are electrically welded to the upper and

lower shielding plates

310 and 320, and the strength of the welding is higher than that of the gas welding, so that the strength of the clamp body 300 is higher.

In a preferred embodiment, the lower clamping plate 500 comprises a fixing portion 520 and a clamping plate portion 510, a hollow groove is formed in the lower baffle plate 320, the clamping plate portion 510 penetrates into the hollow groove downwards, and the fixing portion 520 abuts against the upper end face of the lower baffle plate 320 to achieve limiting;

the cross section of the lower clamping plate 500 is T-shaped, the transverse plate part of the T-shape is a fixing part 520, the vertical plate part of the T-shape is a clamping plate part 510, when the clamping plate part 510 is inserted into the empty groove of the lower baffle 320 of the clamp body 300, the lower baffle 320 has a certain thickness, so that the lower clamping plate 500 can be fixed in the left-right direction after being inserted, when the lower clamping plate 500 is clamped by using a clamping device, the fixing part 520 is abutted against the upper surface of the lower baffle 320, and the lower clamping plate 500 and the clamp mechanism are further fixed relatively.

In other preferred embodiments, the thickness of the lower clamping plate 500 is smaller than the empty slot of the lower baffle 320, i.e., a certain gap exists when the lower clamping plate 500 is inserted into the empty slot.

Preferably, the lower clamping plate 500 is higher than the left protective connecting plate 330 and the right protective connecting plate 340, so that the lower clamping plate 500 can be freely taken out of the clamp body 300.

Preferably, the clamping surface of the lower clamping plate 500 is provided with transverse grains to ensure that the clamping is tight and reliable.

Preferably, the positioning hole 311 is coaxial with a center point of the empty slot, and preferably, the empty slot is rectangular, that is, the center of the empty slot is a symmetric center point. The center of the positioning hole 311 is aligned with the center of the empty slot to ensure that the bar deformation part of the rivet 100 and the corresponding test piece 200 are uniformly stressed when the pulling machine wants to apply a force to the rivet 100, thereby ensuring the accuracy of the experimental result.

In a preferred embodiment, as shown in fig. 6, the positioning sleeve 400 is a rhombic taper positioning sleeve 400, and the positioning is realized by abutting the borderlines of the four corners of the rhombus of the positioning sleeve 400 with the positioning hole 311. Preferably, the positioning sleeve 400 is made of rubber.

In the preferable clamp mechanism for the pulling-out force experiment of the pulling-riveting piece, the effective positioning of the positioning sleeve 400 and the positioning hole 311 is only 4 points, and the effective height of the positioning sleeve 400 is only 3mm; preferably, the length of the diamond-shaped four-corner edge line of the positioning sleeve 400 abutting against the positioning hole 311 is 3mm, the screw part of the blind rivet penetrates into the hole of the positioning sleeve 400, and the gap between the screw and the hole is 10 threads; the single side of the gap between the positioning sleeve 400 and the positioning hole 311 is 5 threads.

This design can prevent in the pull-off process of experiment and experiment anchor clamps between the hard friction lead to the experiment out the data inaccurate, make the influence of experimental result minimize frictional force, obtain more accurate pull-off power. Meanwhile, the positioning gap cannot be too large, and when the gap is too large, clamping is caused, and the test piece clamping of the rivet on the part is slightly unilateral, so that the experimental error is larger. The utility model discloses the clearance distance that adopts can avoid causing experimental error great because of the clamping is unilateral partially.

In an actual use example of the present application, it is preferable to adopt a rivet, and the rivet is completed by inserting a test piece into the rod body from below and then reaching the flange of the rivet, and the test piece is fixed between the flange and the rod body deformation portion, as shown in fig. 3 and 4.

In a preferred embodiment, the screw part of the blind rivet is sleeved with the positioning sleeve with the rhombic taper and then is placed into the positioning hole of the upper baffle plate.

In other embodiments, the rivet to be measured is inserted from bottom to top from a positioning hole in an upper baffle plate of the fixture mechanism, a screw is introduced to protrude out of the upper baffle plate, and a rhombic taper positioning sleeve is inserted from top to bottom into the screw and fixed in the positioning hole.

After the rivet to be measured is fixed, as shown in fig. 5 and 6, the test piece is attached to the lower surface of the upper baffle plate, and the diameters of the rod body part and the rod body deformation part are smaller than those of the positioning hole.

And penetrating the lower armor plate into a hollow groove of the lower baffle plate, and enabling the clamping plate part to extend out of the lower baffle plate and be clamped through clamping equipment so as to finish the fixation of the clamp mechanism.

When an experiment is started, the screw part is clamped by the upper chuck of the tensile machine, the length of the screw part clamped by the tensile machine is enough, so that the thickness of the upper baffle plate cannot be increased under the condition that the thickness meets the strength, and the phenomenon that the effective height of the screw thread clamped by the upper chuck of the tensile machine is insufficient to cause looseness in the experiment process and influence on the experiment result is prevented. In addition, the hole diameter of the experimental positioning hole on the upper baffle plate cannot exceed the tolerance, so that the positioning is loose or the positioning is over-tight.

And continuously improving the force by a tensile machine until the rod deformation part is damaged, and measuring the pull-out force of the rivet.

In other preferred embodiments, the pull-off force of the blind rivet nut may be measured by fixing the screw to a tensile machine, inserting the screw into the positioning sleeve and the blind rivet nut, and fixing the blind rivet nut to the blind rivet nut, and increasing the force of the tensile machine to break the deformed portion of the stem of the blind rivet nut, thereby measuring the pull-off force of the blind rivet nut.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. The terms "first" and "second" are not limiting words, and are used for explanation only, so that the technical solutions of the present invention can be easily understood, and the contents referred to by the "first" and "second" may be replaced with each other. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.

The components, relative arrangements, functions, and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Also, it is apparent that the dimensions of the various parts shown in the drawings are not drawn to scale in practice for ease of description. Techniques, methods and apparatus that are known to those of ordinary skill in the relevant art have not been described in detail for the time being, but are intended to be part of the specification as appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as a limitation.

The foregoing is illustrative of the present invention and is not to be construed as limiting thereof. Although a number of exemplary embodiments of the present invention have been described, those skilled in the art will readily appreciate that many modifications may be made to the exemplary embodiments without departing from the technical features of the present invention. Accordingly, all such modifications are intended to be included within the scope of this invention as defined in the claims. It is to be understood that the foregoing is illustrative of the present invention and is not to be construed as limited to the specific embodiments disclosed, and that modifications to the disclosed embodiments, as well as other embodiments, are intended to be included within the scope of the appended claims. The invention is defined by the claims and their equivalents.

Claims

1. A clamp mechanism for a pulling-out force experiment of a pulling-riveted part is characterized by comprising a clamp main body with a rectangular section, wherein a through positioning hole is arranged on an upper baffle plate of the clamp main body, and a coaxial positioning sleeve is embedded in the positioning hole;

a lower clamping plate is arranged on a lower baffle plate of the clamp main body, and the lower clamping plate is clamped through external clamping equipment to fix the clamp mechanism;

after the pulling and riveting of the pulling and riveting piece, the test piece is fixed between the flange plate of the pulling and riveting piece and the rod body deformation part; the rod body of the rivet piece is positioned in the clamp main body, is vertical to the upper baffle and is coaxial with the positioning sleeve; the diameter of the flange plate is smaller than that of the positioning hole; the test piece is attached to the lower end face of the upper baffle; and measuring the pulling-out force of the rivet by using a force applied to the rivet rod body by a tensile machine and facing the axial direction of the rivet rod body.

2. The fixture mechanism for the blind rivet pulling-out force experiment of claim 1, wherein the fixture body comprises the upper baffle plate, the lower baffle plate, a left protection connecting plate and a right protection connecting plate which are fixedly connected with the upper baffle plate and the lower baffle plate;

lower dress splint include fixed part and splint part, lower baffle on be provided with the dead slot, splint part penetrate downwards the dead slot in, fixed part butt the up end of baffle realizes spacingly down.

3. The fixture mechanism for the blind rivet pulling-out force experiment of claim 2, wherein the height of the lower clamping plate is higher than that of the left protective connecting plate and the right protective connecting plate.

4. The fixture mechanism for the blind rivet pulling-out force experiment of claim 2, wherein the left protective connecting plate and the right protective connecting plate are electrically welded to the upper fender and the lower fender.

5. The fixture mechanism for blind rivet pulling-out force experiments according to claim 2, characterized in that the positioning hole is coaxial with the center point of the empty groove.

6. The fixture mechanism for the pulling-out force experiment of the blind rivet member according to claim 1, wherein the clamping surface of the lower clamping plate is provided with transverse lines.

7. The fixture mechanism for the blind rivet pulling-out force experiment of the claim 1, wherein the positioning sleeve is a rubber rhombic taper positioning sleeve, and the positioning is realized by abutting the sidelines of the rhombic four corners of the positioning sleeve with the positioning holes.

8. The fixture mechanism for the blind rivet pulling-out force experiment of claim 7, wherein the length of the abutting joint of the rhombic four-corner sidelines of the positioning sleeve and the positioning hole is 3mm.

9. The fixture mechanism for blind rivet pulling-out force experiments according to claim 1, characterized in that the blind rivet is a blind rivet.

10. The fixture mechanism for the blind rivet member pulling-out force experiment according to claim 9, characterized in that a screw part of the blind rivet penetrates into a hole of the positioning sleeve, and a gap between the screw and the hole is 10 threads; the clearance between the positioning sleeve and the positioning hole is 5 threads.