Robot spot welding clamp

Abstract

The utility model relates to the field of automobile manufacturing, and discloses a robot spot welding clamp which comprises a base and a plurality of end face clamps arranged on the base, each end face clamp comprises an air cylinder, a driving piece and a driven piece, and the driving piece and the driven piece are provided with a first clamping end and a second clamping end respectively. A clamping opening matched with the thickness of the rear floor is formed between the first clamping end and the second clamping end, the first clamping end is provided with a groove, the second clamping end is provided with a protruding part, the protruding part extends into the groove and is matched with the groove to form an L-shaped containing groove communicated with the clamping opening, and the clamping opening is provided with a clamping groove. The rear floor support has the advantages that the protruding portion is matched with the groove to form the L-shaped containing groove to clamp the bent portion of the rear floor, the bent portion of the rear floor is supported and fixed, and follow-up assembly precision or spot welding precision is improved.

Description

Technical Field

[0001] The utility model relates to the field of automobile manufacturing, in particular to a robot spot welding fixture. Background Art

[0002] The floor of the car is divided into the front floor and the rear floor with the center pillar of the car as the dividing line. The front floor is located at the front of the car body, and the rear floor is located at the rear of the car body.

[0003] Prior art authorization announcement number CN111845957B discloses a rear floor assembly and a car, combined with the text part of its specification and the accompanying drawings Figure 1 It can be seen that in order to adapt to the body structure, the rear floor of existing automobiles will form a partially bent structure during the molding process. As one of the load-bearing components of other automobile parts, the rear floor needs to be spot-welded during the subsequent assembly process. To ensure the accuracy of the spot welding process, a fixture is required to fix the rear floor during the spot welding process. The fixture can accurately fix the rear floor in the required position and posture, ensuring that the relative positions of various parts are accurate during spot welding. This is particularly important for complex structures such as automobile bodies, because any slight deviation may lead to quality problems in the final product.

[0004] Referring to the accompanying drawings of the prior art Figure 1 If you want to perform spot welding on the bent structure of the rear floor, you need to fix the bent part of the rear floor and the main body of the rear floor connecting the bent part at the same time. Because traditional rear floor clamps can only clamp at a single angle, to fix the bent part of the rear floor and the main body of the rear floor connecting the bent part at the same time, you need to set up multiple clamps at different angles for fixing. This makes the overall structure more complicated and difficult to control. Utility Model Content

[0005] The purpose of this utility model is to provide a robot spot welding fixture to solve the problem that the existing rear floor fixture can only clamp at a single angle. To fix the rear floor with a bent portion, multiple fixtures need to be set up at different angles for fixing, resulting in a relatively complex overall structure and high control difficulty. The specific technical solution is as follows:

[0006] A robot spot welding fixture is used to clamp the rear floor of an automobile, comprising a base and several end face clamps arranged on the base, the end face clamps comprising a cylinder, an active part and a passive part, the passive part is fixed to the base, the active part is hinged to the passive part, the cylinder is used to drive the active part to rotate, the active part and the passive part respectively have a first clamping end and a second clamping end, a clamping opening matching the thickness of the rear floor is formed between the first clamping end and the second clamping end, the first clamping end is provided with a groove, and the second clamping end is provided with a protrusion, the protrusion extends into the groove and cooperates with the groove to form an L-shaped accommodating groove connected to the clamping opening.

[0007] Preferably, it further includes a first clamping assembly and a second clamping assembly, wherein the first clamping assembly is connected to the side wall of the groove, and the second clamping assembly is connected to the side of the protrusion, and a first channel is formed between the first clamping assembly and the second clamping assembly, and the width of the first channel matches the thickness of the rear floor.

[0008] Preferably, it further includes a third clamping assembly and a fourth clamping assembly, the third clamping assembly is connected to the bottom surface of the groove, the second clamping assembly is connected to the top surface of the protrusion, and a second channel is formed between the third clamping assembly and the fourth clamping assembly, and the width of the second channel matches the thickness of the rear floor.

[0009] Preferably, an elastic buffer is provided on the passive component, and an accommodating groove for accommodating the elastic buffer is provided on the active component.

[0010] Preferably, the first channel is arranged vertically or inclined.

[0011] Preferably, it further comprises a base, the base is slidably connected to the base, and the base is provided with a plurality of side clamps on opposite sides of the base.

[0012] Preferably, the base is provided with a plurality of first support rods for supporting the rear floor.

[0013] Preferably, the base is provided with a plurality of second support rods for supporting the rear floor, and the end faces of the second support rods are provided with openings, and elastic connectors that are interference-fitted with the openings are inserted into the openings.

[0014] Beneficial effects of the utility model:

[0015] 1. The L-shaped receiving groove formed by the protrusion and the groove is used to clamp the bent portion of the rear floor, provide support and fix the bent portion of the rear floor, and improve the subsequent assembly accuracy or spot welding accuracy;

[0016] 2. The first, second, third, and fourth clamping assemblies can be provided to reduce the contact area between the L-shaped receiving groove and the rear floor, thereby improving its applicability.

[0017] 3. The wear between the active and passive parts can be reduced by setting elastic buffer parts;

[0018] 4. The first support rod and the second support rod can be used to support the rear floor, making it more stable and facilitating subsequent assembly or spot welding operations.

[0019] Additional aspects and advantages of the present invention will be partially given in the description below, and partially will become apparent from the description below, or will be understood through the practice of the present invention. Of course, it is not necessary to achieve all of the advantages described above at the same time when implementing any product or method of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 It is a structural diagram of the present utility model.

[0022] Figure 2 It is a structural schematic diagram of the base of the utility model.

[0023] Figure 3 It is a structural schematic diagram of the first support rod of the utility model.

[0024] Figure 4 It is a structural schematic diagram of the second support rod of the utility model.

[0025] Figure 5 It is a structural schematic diagram of the base of the utility model.

[0026] Figure 6 It is a structural schematic diagram of the end face clamp of the utility model.

[0027] Figure 7 This is another structural schematic diagram of the end face clamp of the present utility model.

[0028] In the figure: 1. Base; 2. End face clamp; 3. Base; 4. Side clamp; 5. Slide rail; 6. First support rod; 7. Second support rod; 21. Cylinder; 22. Active part; 23. Passive part; 24. Clamping mouth; 25. First clamping assembly; 26. Second clamping assembly; 27. Third clamping assembly; 28. Fourth clamping assembly; 29. ​​Elastic buffer; 221. First clamping end; 231. Second clamping end; 222. Groove; 232. Protrusion; 2221. Accommodating groove; 71. Elastic plug-in part. DETAILED DESCRIPTION

[0029] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] See also Figure 1-7 The present invention provides a robot spot welding fixture for clamping a rear floor of an automobile, wherein the rear floor is specifically a rear floor of an automobile with a bending structure. The present invention specifically includes a base 1 and a plurality of end face fixtures 2 arranged on the base 1. The end face fixture 2 includes a cylinder 21, an active part 22 and a passive part 23. The passive part 23 is fixed to the base 1. The active part 22 is arranged on the top surface of the passive part 23 and the active part 22 and the passive part 23 are hinged. The cylinder 21 is vertically arranged and the cylinder body of the cylinder 21 is installed on the base 1. The telescopic rod of the cylinder 21 is connected to the active part 22. The cylinder 21 is used to drive the active part 22 to rotate, thereby enabling the active part 22 and the passive part 23 to clamp the rear floor.

[0032] The specific shapes of the active member 22 and the passive member 23 in this embodiment are adapted based on the shape of the rear floor. Specifically, the active member 22 and the passive member 23 respectively have a first clamping end 221 and a second clamping end 231. A clamping opening 24 matching the thickness of the rear floor is formed between the first clamping end 221 and the second clamping end 231. The clamping opening 24 is used to clamp the rear floor for connecting the main body of the bent part or clamping the connection between the rear floor main body and the bent part. Furthermore, the first clamping end 221 is provided with a groove 222, and the second clamping end 231 is provided with a protrusion 232. The protrusion 232 extends into the groove 222 and cooperates with the groove 222 to form an L-shaped receiving groove connected to the clamping opening 24. The L-shaped receiving groove is used to clamp the bent part of the rear floor, provide support for the bent part of the rear floor, and fix the bent part of the rear floor, thereby improving the subsequent assembly accuracy or spot welding accuracy.

[0033] Based on the above embodiment, further improvements can be made to the L-shaped receiving groove to enhance its applicability. Specifically, the L-shaped receiving groove further comprises a first clamping assembly 25, a second clamping assembly 26, a third clamping assembly 27, and a fourth clamping assembly 28. The first clamping assembly 25 is connected to the side wall of the groove 222, and the second clamping assembly 26 is connected to the side of the protrusion 232. A first channel is formed between the first clamping assembly 25 and the second clamping assembly 26, and the width of the first channel matches the thickness of the rear floor. When the first clamping assembly 25 and the second clamping assembly 26 clamp the rear floor, the rear floor is located in the first channel.

[0034] The third clamping assembly 27 is connected to the bottom surface of the groove 222, and the second clamping assembly 26 is connected to the top surface of the protrusion 232. A second channel is formed between the third clamping assembly 27 and the fourth clamping assembly 28. The width of the second channel matches the thickness of the rear floor. When the third clamping assembly 27 and the fourth clamping assembly 28 clamp the rear floor, the rear floor is located in the second channel.

[0035] In this embodiment, the first clamping assembly 25 can be provided separately to cooperate with the second clamping assembly 26, or the third clamping assembly 27 can be provided separately to cooperate with the fourth clamping assembly 28, or the first clamping assembly 25, the second clamping assembly 26, the third clamping assembly 27 and the fourth clamping assembly 28 can be provided at the same time. It can be understood that if the inner wall of the L-shaped receiving groove is used to clamp the rear floor, surface-to-surface contact will be formed between the rear floor and the inner wall of the L-shaped receiving groove, which has certain requirements for the surface flatness of the rear floor. By providing the first clamping assembly 25, the second clamping assembly 26, the third clamping assembly 27 and the fourth clamping assembly 28, the contact area between the L-shaped receiving groove and the rear floor can be reduced while playing the role of clamping and fixing, thereby making it more suitable for use.

[0036] In some embodiments, since the bent portion of the rear floor can be perpendicular to the main portion of the rear floor, or can be non-perpendicular to the main body of the rear floor, in this embodiment, the first channel is vertically or inclined.

[0037] Preferably, an elastic buffer 29 is provided on the passive component 23, and an accommodating groove 2221 for accommodating the elastic buffer 29 is provided on the active component 22. The elastic buffer 29 is made of rubber and is arranged on the top surface of the protrusion 232 of the passive component 23, and the accommodating groove 2221 is arranged on the inner wall of the groove 222 of the active component 22. The elastic buffer 29 and the accommodating groove 2221 are both arranged close to the hinge of the active component 22 and the passive component 23, and have a buffering effect on the active component 22 without affecting the clamping function. By default, supported by the elastic buffer 29, there is a gap of 1-2 mm between the active component 22 and the passive component 23 even when the rear floor is not clamped. By arranging the elastic buffer 29, the wear between the active component 22 and the passive component 23 can be reduced.

[0038] In order to facilitate adaptation to rear floors of different lengths, the utility model also provides some embodiments, which also include a base 3, the base 1 is slidably connected to the base 3, and the base 3 is provided with several side clamps 4 on opposite sides of the base 1. Specifically, a slide rail 5 is provided on the base 3, and the base 1 is installed on the slide rail 5 and slides with it, and a corresponding driving mechanism can also be provided. For example, a motor is used to drive a screw transmission mechanism to drive the base 1, which is equivalent to the base 3 sliding. By setting the base 1 and the base 3, the base 1 can flexibly adjust the position of the base 1 on the base 3 according to the length of the rear floor and thus match the rear floor, while the side clamps 4 use traditional clamps. The side clamps 4 include a passive clamping component, an active clamping component and a clamping cylinder identical to the end face clamp 2. The passive clamping component and the active clamping component are hinged, and the clamping cylinder drives the active clamping component to cooperate with the passive clamping component to clamp the rear floor from the side, thereby fixing the rear floor.

[0039] In some embodiments, the base 3 is provided with several first support rods 6 for supporting the rear floor, and the base 1 is provided with several second support rods 7 for supporting the rear floor. The end face of the second support rod 7 is provided with an opening, and the opening is inserted with an elastic connector 71 that is interference fit with the opening, wherein the elastic connector 71 is made of rubber. Its specific usage method is to utilize the mounting holes reserved on the rear floor, and connect the elastic connector 71 through the mounting holes to the opening of the second support rod 7 to strengthen the connection. Of course, if the rear floor does not have a reserved mounting hole, the elastic connector 71 is not used. It can be understood that since the end face clamp 2 and the side clamp 4 both support and clamp the rear floor from the edge of the rear floor, the middle of the rear floor will be in a suspended state. Therefore, the first support rod 6 and the second support rod 7 can support the rear floor, which can make it more stable and facilitate subsequent assembly or spot welding operations.

[0040] It should be noted that the terms "first," "second," etc., used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Therefore, a feature designated as "first" or "second" may explicitly or implicitly include one or more of the aforementioned features.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A robot spot welding fixture used for clamping the rear floor of a car, characterized in that: It includes a base and several end face clamps arranged on the base, the end face clamps include a cylinder, an active part and a passive part, the passive part is fixed to the base, the active part is hinged to the passive part, the cylinder is used to drive the active part to rotate, the active part and the passive part respectively have a first clamping end and a second clamping end, a clamping opening matching the thickness of the rear floor is formed between the first clamping end and the second clamping end, the first clamping end is provided with a groove, the second clamping end is provided with a protrusion, the protrusion extends into the groove and cooperates with the groove to form an L-shaped receiving groove connected to the clamping opening.

2. A robot spot welding fixture according to claim 1, characterized in that: It also includes a first clamping assembly and a second clamping assembly, the first clamping assembly is connected to the side wall of the groove, the second clamping assembly is connected to the side of the protrusion, a first channel is formed between the first clamping assembly and the second clamping assembly, and the width of the first channel matches the thickness of the rear floor.

3. The robot spot welding fixture according to claim 1, characterized in that: It also includes a third clamping assembly and a fourth clamping assembly, the third clamping assembly is connected to the bottom surface of the groove, the second clamping assembly is connected to the top surface of the protrusion, and a second channel is formed between the third clamping assembly and the fourth clamping assembly, and the width of the second channel matches the thickness of the rear floor.

4. The robot spot welding fixture according to claim 1, characterized in that: An elastic buffer is provided on the passive component, and an accommodating groove for accommodating the elastic buffer is provided on the active component.

5. The robot spot welding fixture according to claim 2, characterized in that: The first channel is arranged vertically or inclined.

6. The robot spot welding fixture according to claim 5, characterized in that: It also includes a base, the base is slidably connected to the base, and the base is provided with a plurality of side clamps on opposite sides of the base.

7. The robot spot welding fixture according to claim 6, characterized in that: The base is provided with a plurality of first support rods for supporting the rear floor.

8. The robot spot welding fixture according to claim 1, characterized in that: The base is provided with a plurality of second support rods for supporting the rear floor. The end faces of the second support rods are provided with openings, and elastic connectors which are interference-fitted with the openings are inserted into the openings.

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