Sample clamping device for resistance spot welding test

Abstract

The utility model relates to a sample clamping device for a resistance spot welding test, which comprises a clamp component, a clamping component and a clamping component, the clamp component comprises a frame and a movable clamping component, the frame is provided with an accommodating area, and the movable clamping component is mounted in the accommodating area and can slide along the length direction of the accommodating area; wherein a groove is formed in the side, close to the containing area, of the frame, a containing channel is formed in the other side, close to the containing area, of the frame, and the position of the groove is opposite to that of the containing channel; the movable clamping assembly and the groove are matched to clamp the sample, and at least part of the movable clamping assembly extends into the containing channel and is connected with the frame. The test fixture solves the problem that no test fixture is suitable for the existing mass production spot welding machine, can be assembled by using simple plates and square tubes, and is low in processing difficulty and convenient to operate; and a stable and reliable spot welding test effect can be achieved with relatively low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of resistance spot welding auxiliary devices, in particular to a sample clamping device used for resistance spot welding tests. Background Art

[0002] Resistance spot welding is a welding technology used to form stable connections between metal sheets. It is widely used in connections such as between thin plates in mechanical devices, between components of automobile bodies, and between thin plates of metal daily necessities.

[0003] Before a product is mass-produced, it is often necessary to test the welding parameters. In the past, the test mainly used the welding robot of the mass production line, and the robot operation and welding parameter adjustment were relatively complicated. Nowadays, a simpler test solution is to use a fixed spot welding machine, which only needs to adjust the welding parameters, eliminating the tedious steps of the robot. At the same time, the use of a fixed spot welding machine also requires a device for clamping the sample.

[0004] At present, the appearance size and working mode of the mainstream commercial fixed spot welding machines in China are basically the same. Designing a test fixture for use on a fixed spot welding machine can greatly facilitate future spot welding test work.

[0005] As is known, a Chinese utility model patent (CN217132781 U) discloses a metal plate fixture for resistance welding test, which includes a base and a support platform, a clamping plate is provided above the support platform, and the clamping plate is connected to the base through a flip mechanism, and the flip mechanism includes an actuator component and a drive component. However, the structure has many components, a complex transmission structure, high requirements on the sample size, and poor compatibility with spot welding equipment.

[0006] In addition, a Chinese invention patent (CN113752182A) discloses a multifunctional clamp for steel plate resistance welding test samples. The device cannot be directly matched and installed with most existing spot welding machines. Defects such as strict requirements on sample size and unclear function of the clamping part make it impossible to complete the test work.

[0007] In summary, by collecting the existing spot welding test fixture solutions, it was found that there is no effective test fixture suitable for commercial fixed spot welding machines. Most of the existing solutions are based on small spot welding equipment dedicated to testing or consumer electronics, which cannot be applied to spot welding tests of hot-formed steel for car bodies. Utility Model Content

[0008] Aiming at the deficiencies of the prior art, the utility model discloses a sample clamping device for resistance spot welding test.

[0009] The technical solution adopted by the utility model is as follows:

[0010] A sample clamping device for resistance spot welding test, comprising:

[0011] A clamp assembly, comprising a frame with a receiving area and a movable clamp assembly installed in the receiving area, wherein the movable clamp assembly can slide along the length direction of the receiving area;

[0012] A groove is formed on one side of the frame close to the accommodating area, and an accommodating channel is formed on the other side of the frame close to the accommodating area, and the position of the groove is opposite to the position of the accommodating channel;

[0013] The movable clamping assembly cooperates with the groove to clamp the sample, and at least a portion of the movable clamping assembly extends into the accommodating channel and is connected to the frame.

[0014] In one embodiment of the utility model, the frame includes a first plate, a second plate, a third plate and a fourth plate stacked together, and the first plate, the second plate, the third plate and the fourth plate are all provided with hollow portions, and the hollow portions of the first plate, the second plate, the third plate and the fourth plate form the accommodating area; wherein the second plate is provided with a first groove and a first accommodating channel; and the third plate is provided with a second groove and a second accommodating channel.

[0015] In one embodiment of the present invention, the second plate is provided with a group of first protrusions; the third plate is provided with a group of second protrusions; and the movable clamping assembly slides along the first protrusions or the second protrusions.

[0016] In an embodiment of the present invention, the first plate member, the second plate member, the third plate member and the fourth plate member are fixedly connected by bolts.

[0017] In one embodiment of the utility model, the movable clamping assembly includes a first clamping member, a second clamping member and a third clamping member stacked together; wherein the second clamping member is connected to a connecting member, and the connecting member extends into the first accommodating channel or the second accommodating channel.

[0018] In an embodiment of the present invention, two sides of the second clamping member are provided with sliding grooves, and the sliding grooves clamp the first protrusion or the second protrusion.

[0019] In one embodiment of the present invention, the movable clamping assembly further comprises an elastic element disposed on the connecting member, one end of the elastic element abuts against the movable clamping assembly, and the other end of the elastic element abuts against the frame.

[0020] In an embodiment of the present invention, the first clamping member, the second clamping member and the third clamping member are fixed by bolts.

[0021] In one embodiment of the present invention, the clamp assembly further comprises an elastic support member disposed at the bottom of the frame, and at least a portion of the elastic support member is located in the accommodating area for supporting the sample.

[0022] In one embodiment of the present invention, a base is further included, and the base supports the clamp assembly.

[0023] The above technical solution of the utility model has the following advantages compared with the prior art:

[0024] The sample clamping device for resistance spot welding test of the utility model is suitable for spot welding test of materials such as hot-formed steel for vehicle body, and provides a feasible solution for resistance spot welding tensile shear test required by national standards.

[0025] The sample clamping device for resistance spot welding test described in the utility model is suitable for conventional industrial fixed spot welding machines, has extremely low manufacturing cost, low processing difficulty, simple use process, and can greatly improve the efficiency of resistance electric welding parameter test.

[0026] The sample clamping device for resistance spot welding test disclosed by the utility model can effectively solve the problem of unstable welding spot position during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0028] Figure 1 The utility model is a schematic structural diagram of a sample clamping device used for resistance spot welding test.

[0029] Figure 2 It is an exploded view of the clamp assembly in the utility model.

[0030] Figure 3 It is a structural schematic diagram of the first viewing angle of the frame in the utility model.

[0031] Figure 4 It is a structural schematic diagram of the second viewing angle of the frame in the utility model.

[0032] Figure 5 yes Figure 3 A magnified schematic diagram of center A.

[0033] Figure 6 yes Figure 3 A magnified schematic diagram of point B in the middle.

[0034] Figure 7 yes Figure 4 Enlarged schematic diagram of point C in the middle.

[0035] Figure 8 yes Figure 4 Enlarged schematic diagram of point D in the middle.

[0036] Fig. 9 It is a structural schematic diagram of the movable clamping assembly in the utility model.

[0037] Fig.10 It is a side view of the movable clamping assembly in the utility model.

[0038] Description of the Figures in the Specification:

[0039] 100, clamp assembly; 101, frame; 1011, first plate; 1012, second plate; 1013, third plate; 1014, fourth plate; 102, accommodating area; 103, first protrusion; 104, second protrusion; 1051, first groove; 1052, second groove; 1061, first accommodating channel; 1062, second accommodating channel;

[0040] 120, movable clamping assembly; 1201, first clamping member; 1202, second clamping member; 1203, third clamping member; 1204, connecting member; 121, slide groove; 130, elastic element; 140, elastic support member; 200, base. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0042] The above and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only the directions of the reference drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention. In addition, in all embodiments, the same reference numerals represent the same elements.

[0043] It has been found in actual use that the existing resistance welding test fixtures have complex mechanical transmission structures and heavy steel structure frames, which result in high processing difficulty, high cost, difficult to meet clearance matching requirements, complex operation, and high maintenance difficulties, which ultimately lead to the cost and efficiency not meeting expectations. In addition, the existing resistance welding test fixtures are too simple, and the fixing device is only suitable for a single specific size, without considering the spatial characteristics of the existing spot welding equipment, and cannot be used for test work.

[0044] In order to solve the above problems, this embodiment provides a sample clamping device for resistance spot welding test.

[0045] Combination Figure 1 and Figure 2 , a sample clamping device for resistance spot welding test, comprising:

[0046] The clamp assembly 100 includes a frame 101 having a receiving area 102 and a movable clamp assembly 120 installed in the receiving area 102, wherein the movable clamp assembly 120 can slide along the length direction of the receiving area 102;

[0047] A groove is formed on one side of the frame 101 close to the accommodation area 102, and an accommodation channel is formed on the other side of the frame 101 close to the accommodation area 102. The position of the groove is opposite to the position of the accommodation channel.

[0048] The movable clamping assembly 120 cooperates with the groove to clamp the sample, and at least a portion of the movable clamping assembly 120 extends into the accommodating channel and is connected to the frame 101 .

[0049] In this embodiment, combined with Figures 3 to 8 The frame 101 includes a first plate 1011, a second plate 1012, a third plate 1013 and a fourth plate 1014 stacked together, and the first plate 1011, the second plate 1012, the third plate 1013 and the fourth plate 1014 are all provided with hollow parts, and the hollow parts of the first plate 1011, the second plate 1012, the third plate 1013 and the fourth plate 1014 form a receiving area 102; wherein, in combination with Figure 7 and Figure 8 The second plate 1012 defines a first groove 1051 and a first accommodating channel 1061; Figure 5 and Figure 6 The third plate 1013 defines a second groove 1052 and a second accommodating channel 1062 .

[0050] Specifically, the first plate 1011 , the second plate 1012 , the third plate 1013 and the fourth plate 1014 are fixedly connected by bolts.

[0051] Furthermore, if Figure 3 As shown, the second plate 1012 is provided with a group of first protrusions 103 ; the third plate 1013 is provided with a group of second protrusions 104 ; and the movable clamping assembly 120 slides along the first protrusions 103 or the second protrusions 104 .

[0052] In this embodiment, combined with Figure 1 , Fig. 9 and Fig.10, a first groove 1051 and a first accommodating channel 1061 are opened corresponding to the second plate 1012; a second groove 1052 and a second accommodating channel 1062 are opened on the third plate 1013, and two movable clamping assemblies 120 are designed, each movable clamping assembly 120 includes a first clamping member 1201, a second clamping member 1202 and a third clamping member 1203 stacked together; wherein the second clamping member 1202 is connected to the connecting member 1204, and the connecting member 1204 extends into the first accommodating channel 1061 or the second accommodating channel 1062.

[0053] Specifically, the first clamping member 1201 , the second clamping member 1202 and the third clamping member 1203 are fixed by bolts.

[0054] Preferably, the connecting member 1204 and the second clamping member 1202 are integrally formed.

[0055] Furthermore, the second clamping member 1202 is provided with a slide groove 121 on both sides, and the slide groove 121 clamps the first protrusion 103 or the second protrusion 104. Specifically, the width of the first clamping member 1201 is equal to the width of the third clamping member 1203, and the width of the second clamping member 1202 is smaller than the width of the first clamping member 1201, and the width of the second clamping member 1202 is smaller than the width of the third clamping member 1203, so that the slide groove 121 is formed on both sides of the second clamping member 1202, and the slide groove 121 forms a slide rail structure together with the first protrusion 103 or the second protrusion 104. When the movable clamping assembly 120 slides, the width of the accommodating area 102 part changes accordingly, so that a test piece of a specific width can be clamped.

[0056] In some possible embodiments, the movable clamping assembly 120 further includes an elastic element 130 disposed on the connecting member 1204, one end of the elastic element 130 abuts against the movable clamping assembly 120, and the other end of the elastic element 130 abuts against the frame 101. The elastic element 130 may be a compression spring to limit the movable clamping assembly 120 in the vertical direction.

[0057] In some possible embodiments, the clamp assembly 100 further includes an elastic support member 140 disposed at the bottom of the frame 101, and at least a portion of the elastic support member 140 is located in the receiving area 102, and is used to support the specimen. Specifically, one side of the elastic support member 140 is fixed to the frame 101 by bolts, and is used to lift the lower test sheet upward so that it is close to the upper test sheet.

[0058] In this embodiment, the sample clamping device for resistance spot welding test further includes a base 200, the base 200 supports the clamp assembly 100, and the base 200 is connected to the clamp assembly 100 by bolts. Figure 1As shown, the base 200 is composed of multiple square tubes of specific sizes, and most of the connection points can be connected by welding or by connection and bolts. The overall size can be matched with the spot welding machine used in the experiment.

[0059] It can be understood that the sample clamping device used for resistance spot welding test consists of two parts: an upper clamp assembly 100 and a lower base 200. The main body of the clamp assembly 100 is composed of multiple layers of plates with specific shapes. The movable clamping assembly 120 is composed of two or more layers of plates. The movable clamping assembly 120 can be equipped with springs to assist clamping.

[0060] The working principle of this embodiment is as follows:

[0061] After the fixture assembly 100 and the base 200 are fully assembled, they are installed to the welding position in front of the spot welding machine. After adjusting the electrode cap and the test piece to be centered, the spot welding machine electrode and the fixture position are fixed, and the movable clamping assembly 120 of the fixture assembly 100 is pulled open and the test piece is installed. During this process, the slide groove 121 slides along the first protrusion 103 or the second protrusion 104.

[0062] After adjusting the welding parameters, the spot welding machine is started. After welding is completed, the movable clamping assembly 120 of the clamp assembly 100 is opened to take out the welded test piece. When multiple groups of tests are performed, the steps of clamping to taking out the material can be repeated.

[0063] Test Example 1

[0064] A set of spot welding tests verified the welding process window of 1.0mm thick Al-Si coated hot-formed steel and 1.0mm thick Al-Si coated hot-formed steel. The sample size was 45×175mm, the sample overlap length was 35mm, and the test parameters were selected: welding pressure 2-4KN, welding current 5-8KA. Before the test, the position of the fixture was adjusted so that the electrode head was aligned with the expected welding position, and the movable clamping assembly of the fixture was pulled open 120 to clamp the upper and lower pieces of material. After adjusting the parameters, click the start button, and remove the piece after welding is completed.

[0065] Test Example 2

[0066] A set of spot welding tests verified the welding process windows of 1.0mm thick Al-Si coated hot-formed steel and 1.6mm thick Al-Si coated hot-formed steel. The sample size was 45mm×175mm, the sample overlap length was 35mm, and the test parameters were selected as follows: welding pressure 2kN-4kN, welding current 5kA-9kA. Before the test, the position of the fixture was adjusted so that the electrode head was aligned with the expected welding position, and the movable clamping assembly of the fixture was pulled open 120 to clamp the upper and lower pieces of material. After adjusting the parameters, click the start button, and remove the piece after welding is completed.

[0067] Test Example 3

[0068] A set of spot welding tests verified the welding process windows of 1.6mm thick Al-Si coated hot-formed steel and 2.0mm thick Al-Si coated hot-formed steel. The sample size was 60mm×230mm, the sample overlap length was 45mm, and the test parameters were selected as follows: welding pressure 3kN-5kN, welding current 5kA-9kA. Before the test, the position of the fixture was adjusted so that the electrode head was aligned with the expected welding position, and the movable clamping assembly of the fixture was pulled open 120 to clamp the upper and lower pieces of material. After adjusting the parameters, the start button was clicked, and the pieces were removed after welding was completed.

[0069] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0070] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A sample clamping device for resistance spot welding test, characterized in that: include: A clamp assembly (100) comprises a frame (101) provided with a receiving area (102) and a movable clamp assembly (120) installed in the receiving area (102), wherein the movable clamp assembly (120) can slide along the length direction of the receiving area (102); A groove is provided on one side of the frame (101) close to the accommodating area (102), and an accommodating channel is provided on the other side of the frame (101) close to the accommodating area (102), and the position of the groove is opposite to the position of the accommodating channel; The movable clamping assembly (120) cooperates with the groove to clamp the sample, and at least a portion of the movable clamping assembly (120) extends into the accommodating channel and is connected to the frame (101).

2. The sample clamping device for resistance spot welding test according to claim 1, characterized in that: The frame (101) comprises a first plate (1011), a second plate (1012), a third plate (1013) and a fourth plate (1014) stacked together, wherein the first plate (1011), the second plate (1012), the third plate (1013) and the fourth plate (1014) are all provided with hollow portions, and the hollow portions of the first plate (1011), the second plate (1012), the third plate (1013) and the fourth plate (1014) form the accommodating area (102); wherein the second plate (1012) is provided with a first groove (1051) and a first accommodating channel (1061); and the third plate (1013) is provided with a second groove (1052) and a second accommodating channel (1062).

3. The sample clamping device for resistance spot welding test according to claim 2, characterized in that: The second plate (1012) is provided with a group of first protrusions (103); the third plate (1013) is provided with a group of second protrusions (104); and the movable clamping assembly (120) slides along the first protrusions (103) or the second protrusions (104).

4. The sample clamping device for resistance spot welding test according to claim 2, characterized in that: The first plate (1011), the second plate (1012), the third plate (1013) and the fourth plate (1014) are fixedly connected by bolts.

5. The sample clamping device for resistance spot welding test according to claim 3, characterized in that: The movable clamping assembly (120) comprises a first clamping member (1201), a second clamping member (1202) and a third clamping member (1203) stacked together; wherein the second clamping member (1202) is connected to a connecting member (1204), and the connecting member (1204) extends into the first accommodating channel (1061) or the second accommodating channel (1062).

6. The sample clamping device for resistance spot welding test according to claim 5, characterized in that: Slide grooves (121) are provided on both sides of the second clamping member (1202), and the slide grooves (121) clamp the first protruding portion (103) or the second protruding portion (104).

7. The sample clamping device for resistance spot welding test according to claim 5, characterized in that: The movable clamping assembly (120) further comprises an elastic element (130) arranged on the connecting member (1204), one end of the elastic element (130) abuts against the movable clamping assembly (120), and the other end of the elastic element (130) abuts against the frame (101).

8. The sample clamping device for resistance spot welding test according to claim 5, characterized in that: The first clamping member (1201), the second clamping member (1202) and the third clamping member (1203) are fixed by bolts.

9. The sample clamping device for resistance spot welding test according to claim 1, characterized in that: The clamp assembly (100) further comprises an elastic support member (140) arranged at the bottom of the frame (101), and at least a portion of the elastic support member (140) is located in the accommodating area (102) for supporting the sample.

10. The sample clamping device for resistance spot welding test according to claim 1, characterized in that: It also includes a base (200), wherein the base (200) supports the clamp assembly (100).

Images