CN218823578U

CN218823578U - Clamp for resistance spot welding cross tensile test

Info

Publication number: CN218823578U
Application number: CN202223093153.4U
Authority: CN
Inventors: 王亚芬; 李科龙; 杨天一; 韩丹; 郭晶; 王禹; 杜洪志; 王焕
Original assignee: Bengang Steel Plates Co Ltd
Current assignee: Bengang Steel Plates Co Ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-04-07
Anticipated expiration: 2032-11-22

Abstract

The utility model relates to a resistance spot welding cross tensile test uses anchor clamps, including last clamping device, external member, bolt and lower clamping device, its characterized in that, the last clamping device comprises upper clamping end and upper fixed splint, the lower clamping device comprises lower clamping end and lower fixed splint; the sleeve part is a sleeve part with a square-shaped section; the upper fixing clamp plate is placed on a second test plate of the sample, the two ends of the upper fixing clamp plate are respectively sleeved with the external member, and the second test plate of the sample and the external member are clamped and fixed through the upper fixing clamp plate by screwing the bolt; the lower fixing clamp plate is placed on the first test plate of the sample, the two ends of the lower fixing clamp plate are respectively sleeved with the external member, and the screw bolt clamps and fixes the first test plate of the sample and the external member through the lower fixing clamp plate. The beneficial effects are as follows: the utility model discloses a device, simple structure, convenient to use can reduce the preparation requirement to the sample, saves the sample process of punching, reduces test cost, shortens test cycle, improves test efficiency.

Description

Clamp for resistance spot welding cross tensile test

Technical Field

The utility model relates to a welding and experimental technical field especially relate to a resistance spot welding cross anchor clamps for tensile test.

Background

Resistance spot welding is a welding method in which a workpiece to be welded is pressed between two electrodes and is heated to be melted by resistance heat generated by passing current through the workpiece and a contact part to form a metal welding spot, has the advantages of short time, small heat affected zone, high efficiency, good surface quality and the like, and is widely applied to the fields of automobiles, household appliances, aerospace, electronics and the like. In order to ensure the quality of the welding spot, a great number of tests are required, and the cross tensile property of the welding spot is one of important test items.

Chinese patent No. CN 203414337U discloses a special fixture for cross tensile test of welding spot on an automobile panel, which can perform cross tensile test of welding spot under 1000MPa strength, and when preparing samples, the fixture must punch 4 accurate circular positioning holes on each group of samples, and when assembling samples, bolts need to pass through 4 holes to fix the samples and the fixture. The sample punches more loaded down with trivial details, need be equipped with the puncher in corresponding aperture, in addition, to 2Gpa ultrahigh strength steel sample, punches and needs higher-level puncher, if adopt processing sample hole such as wire cut electrical discharge machining bed just more take trouble hard. Generally, the welding of each batch of cross tensile samples reaches hundreds, so that the test period is greatly prolonged, the test cost is high, and the test efficiency is low.

SUMMERY OF THE UTILITY MODEL

For overcoming the prior art defect, the utility model provides a technical problem provides a resistance spot welding cross anchor clamps for tensile test, simple structure, and convenient to use can reduce the preparation requirement to the sample, saves the sample process of punching, reduces test cost, shortens test cycle, improves test efficiency.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a clamp for a resistance spot welding cross tensile test comprises an upper clamping device, a kit, a bolt and a lower clamping device, and is characterized in that the upper clamping device consists of an upper clamping end and an upper fixed clamping plate, wherein the upper clamping end is fixedly connected with the upper fixed clamping plate through threads, and a connecting point is positioned in the center of the plane of the upper fixed clamping plate; the lower clamping device consists of a lower clamping end and a lower fixed clamping plate, wherein the lower clamping end is fixedly connected with the lower fixed clamping plate, and a connecting point is positioned in the center of the plane of the lower fixed clamping plate; the sleeve is a sleeve part with a section in a shape like a Chinese character 'hui', and one surface of the sleeve part is provided with a thread matched with the bolt; the upper fixing clamp plate is placed on a second test plate of the sample, the two ends of the upper fixing clamp plate are respectively sleeved with the external member, and the second test plate of the sample and the external member are clamped and fixed through the upper fixing clamp plate by screwing the bolt; the lower fixing clamp plate is placed on the first test plate of the sample, the two ends of the lower fixing clamp plate are respectively sleeved with the external member, and the screw bolt clamps and fixes the first test plate of the sample and the external member through the lower fixing clamp plate.

Go up the exposed core and constitute by cylinder section and nut section, wherein the one end of cylinder section is equipped with the screw thread that matches with the nut section, through threaded connection between cylinder section and the nut section, through the distance between rotatory adjustable cylinder section and the nut section, go up the exposed core promptly and be the telescopic.

The upper clamping device and the lower clamping device are arranged on a first test board and a second test board of the sample at an angle of 90 degrees respectively.

And grooves matched with the threads on the sleeve are arranged at two ends of the connecting surface of the upper fixing clamping plate and the upper clamping end.

And grooves matched with the threads on the sleeve are formed in the two ends of the connecting surface of the lower fixing clamping plate and the lower clamping end.

Compared with the prior art, the beneficial effects of the utility model are that:

1) The utility model can reduce the preparation requirement for the sample, save the sample punching process, reduce the test cost, shorten the test period and improve the test efficiency;

5) The utility model discloses a device not only can install on the hydraulic pressure servo chuck of import, moreover can the direct mount on the domestic tensile testing machine of mechanical type, the installation is dismantled simple and conveniently, not fragile, small in size light.

Drawings

FIG. 1 is a schematic view of the three-dimensional structure of the present invention;

FIG. 2 is a schematic front view of the upper clamping device according to the present invention;

FIG. 3 is a schematic top view of the upper clamping device according to the present invention;

FIG. 4 is a schematic perspective view of the assembly and the bolt according to the present invention;

FIG. 5 is a schematic front view of the structure of the lower clamping device of the present invention;

FIG. 6 is a schematic top view of the structure of the lower clamping device of the present invention;

fig. 7 is a schematic diagram of the three-dimensional structure of the sample of the present invention.

In the figure: 1-upper clamping end 11-cylindrical section 12-nut section 2-upper fixed splint 3-suite 4-bolt 5-lower clamping end 6-lower fixed splint 7-first test plate 8-second test plate

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

as shown in fig. 1-7, the clamp for resistance spot welding cross tensile test according to the present invention comprises an upper clamping device, a kit 3, a bolt 4 and a lower clamping device, wherein the upper clamping device is composed of an upper clamping end 1 and an upper fixing splint 2, the upper clamping end 1 and the upper fixing splint 2 are fixedly connected through a thread, and a connection point is located at a central position of a plane of the upper fixing splint 2; the lower clamping device consists of a lower clamping end 5 and a lower fixed splint 6, wherein the lower clamping end 5 is fixedly connected with the lower fixed splint 6, and a connecting point is positioned at the center of the plane of the lower fixed splint 6; the sleeve 3 is a sleeve with a section in a shape like a Chinese character 'hui', and one surface of the sleeve is provided with a thread matched with the bolt 4; the upper fixing clamp plate 2 is placed on a second test plate 8 of the sample, the sleeve piece 3 is sleeved at two ends of the upper fixing clamp plate, and the second test plate 8 of the sample and the sleeve piece 3 are clamped and fixed into a whole by tightening the bolt 4 through the upper fixing clamp plate 2; the lower fixing clamp plate 6 is placed on a first test plate 7 of the sample, the two ends of the lower fixing clamp plate are respectively sleeved with the external member 3, and the first test plate 7 of the sample and the external member 3 are clamped and fixed into a whole by screwing the bolt 4 through the lower fixing clamp plate 6.

Go up exposed core 1 and constitute by cylinder section 11 and nut section 12, wherein the one end of cylinder section 11 is equipped with the screw thread that matches with nut section 12, through threaded connection between cylinder section 11 and the nut section 12, through the distance between rotatory adjustable cylinder section 11 and the nut section 12, go up exposed core 1 promptly and be the telescopic to make things convenient for the loading and unloading of sample.

The upper clamping device and the lower clamping device are arranged on a first test board 7 and a second test board 8 of the sample at an angle of 90 degrees respectively.

The both ends that go up solid fixed splint 2 and last exposed core 1 and be connected the face are equipped with the recess that matches with the screw thread on the external member 3, prevent 4 tip of bolts dislocation of skidding.

The both ends that lower solid fixed splint 6 and lower exposed core 5 are connected the face are equipped with the recess with screw thread matching on the external member 3, prevent 4 tip of bolt dislocation of skidding.

When in use, the utility model is used,

1) The device is respectively connected with a tensile testing machine through an upper clamping end 1 and a lower clamping end 5;

2) Placing a first test plate 7 of a sample on a lower fixing clamp plate 6, sleeving an upper suite 3 at two ends of the first test plate respectively (placing a bolt 4 downwards), and tightening the bolt 4 to clamp and fix the first test plate 7 of the sample and the suite 3 into a whole through the lower fixing clamp plate 6;

3) Setting the upper fixing splint 2 and the first test plate 7 at 90 degrees, adjusting the speed of a tensile testing machine to enable the upper fixing splint 2 to slowly fall onto a second test plate 8 of a sample, finely adjusting the upper clamping end 1 to enable the upper fixing splint 2 to be tightly attached to the second test plate 8, respectively sleeving the two ends of the upper fixing splint 2 with the external member 3 (placing the bolt 4 upwards), and tightening the bolt 4 to clamp and fix the second test plate 8 of the sample and the external member 3 into a whole through the upper fixing splint 2;

4) And starting the tensile testing machine, and finishing the tensile test at a certain speed according to the operation standard.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A clamp for a resistance spot welding cross tensile test comprises an upper clamping device, a kit, a bolt and a lower clamping device, and is characterized in that the upper clamping device consists of an upper clamping end and an upper fixed clamping plate, wherein the upper clamping end is fixedly connected with the upper fixed clamping plate through threads, and a connecting point is positioned in the center of the plane of the upper fixed clamping plate; the lower clamping device consists of a lower clamping end and a lower fixed clamping plate, wherein the lower clamping end is fixedly connected with the lower fixed clamping plate, and a connecting point is positioned in the center of the plane of the lower fixed clamping plate; the sleeve is a sleeve part with a section in a shape like a Chinese character 'hui', and one surface of the sleeve part is provided with a thread matched with the bolt; the upper fixing clamp plate is placed on a second test plate of the sample, the two ends of the upper fixing clamp plate are respectively sleeved with the external member, and the second test plate of the sample and the external member are clamped and fixed through the upper fixing clamp plate by screwing the bolt; the lower fixing clamp plate is placed on the first test plate of the sample, the two ends of the lower fixing clamp plate are respectively sleeved with the external member, and the screw bolt clamps and fixes the first test plate of the sample and the external member through the lower fixing clamp plate.

2. The fixture for the resistance spot welding cross tensile test according to claim 1, wherein the upper clamping end is composed of a cylindrical section and a nut section, wherein one end of the cylindrical section is provided with a thread matched with the nut section, and the cylindrical section and the nut section are connected through the thread.

3. The jig for resistance spot welding cross tensile test according to claim 1, wherein the upper holding means and the lower holding means are provided at 90 ° on a first test plate and a second test plate of the test piece, respectively.

4. The clamp for the resistance spot welding cross tensile test according to claim 1, wherein the two ends of the connecting surface of the upper fixing splint and the upper clamping end are provided with grooves matched with the threads on the sleeve.

5. The clamp for the resistance spot welding cross tensile test according to claim 1, wherein the two ends of the connecting surface of the lower fixing splint and the lower clamping end are provided with grooves matched with the threads on the sleeve.