Rivet welding tool for central upper bracket assembly of front bumper

Abstract

The utility model relates to the technical field of welding, and discloses a front bumper center upper support assembly rivet welding tool which is used for welding a support body and a fixing frame to form a support assembly. The rivet welding tool is installed on a resistance welding machine and comprises a bottom plate, a linear guide rail, a supporting plate, a positioning plate, a spring and a positioning pin, and the bottom plate is installed on the resistance welding machine. The linear guide rail is transversely fixed on the bottom plate; the supporting plate is fixedly installed on a sliding block of the linear guide rail. The positioning plate is arranged above the supporting plate, a plurality of springs are arranged between the positioning plate and the supporting plate, and a plurality of bolts penetrate through the positioning plate and the springs to be in threaded connection with the supporting plate; convex columns capable of supporting the bracket body are arranged at two ends of one side, close to an electrode of the resistance welding machine, of the positioning plate, and the electrode is positioned between the two convex columns; and the positioning pin is detachably mounted in the convex column. The tool is used for positioning and welding on the resistance welding machine, and has the advantages of high welding precision and good product consistency, meanwhile, the production efficiency is improved, and the labor intensity is reduced.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a riveting and welding fixture for the central upper bracket assembly of a front bumper. Background Technology

[0002] The central upper support assembly 20 of the front bumper is welded together from two sheet metal parts: the support body 20.1 and the fixing bracket 20.2. Its structure is shown in the attached figure. Figure 7 As shown, the bracket body 20.1 has two through holes 20.1.1 at the position where the fixing bracket 20.2 is welded. The two ends of the fixing bracket 20.2 are respectively welded with two nuts 20.2.1 that are connected to the through holes 20.1.1 of the bracket body 20.1. The fixing bracket is welded to the bracket body, and the nuts and through holes are required to be coaxial.

[0003] Currently, traditional clamp welding is used for welding, which suffers from low welding efficiency and high operational difficulty. It also requires the design of positioning fixtures to fix and position the bracket body, making positioning challenging. When using resistance welding machines, the lack of positioning devices necessitates manual handling of the bracket body and fixing frame, resulting in high labor intensity and poor product consistency due to low positioning accuracy, leading to a significant defect rate.

[0004] Based on this, this application develops a riveting and welding fixture for the central upper bracket assembly of the front bumper, which is suitable for welding on a resistance welding machine, to ensure product consistency, improve production efficiency, and reduce labor intensity. Utility Model Content

[0005] The present invention aims to solve the technical problems existing in the prior art. Therefore, the present invention provides a solution.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A riveting and welding fixture is provided for a front bumper center upper bracket assembly, used to weld the bracket body and the fixing frame to form a bracket assembly. The riveting and welding fixture is installed on a resistance welding machine and includes a base plate, a linear guide rail, a support plate, a positioning plate, springs, and positioning pins. The base plate is installed on the resistance welding machine. The linear guide rail is laterally fixed to the base plate. The support plate is fixedly installed on the slider of the linear guide rail. The positioning plate is located above the support plate, and multiple springs are arranged between the positioning plate and the support plate. Multiple bolts pass through the positioning plate, springs, and are screwed to the support plate. The positioning plate has protrusions at both ends on the side near the electrode of the resistance welding machine that can support the bracket body, with the electrode located between the two protrusions. The positioning pins are detachably installed inside the protrusions for positioning the bracket body and the fixing frame.

[0008] In some optional embodiments, the positioning pin is arranged from top to bottom as a guide part, a nut positioning part, and a through hole positioning part. The outer diameter of the nut positioning part is equal to the inner diameter of the nut on the fixing bracket, and the outer diameter of the through hole positioning part is equal to the diameter of the through hole on the bracket body.

[0009] In some alternative embodiments, the protrusion has a socket, the bottom of the locating pin is inserted into the socket, and locked by a set screw on the side of the protrusion.

[0010] In some optional embodiments, a limiting block is also included, which is disposed at both ends of the linear guide rail and fixedly installed on the base plate to limit the travel of the left and right ends of the positioning plate.

[0011] In some alternative embodiments, the limiting block is L-shaped, and its base plate has an oval mounting hole.

[0012] In some alternative embodiments, an insulating positioning plate is also included, which is mounted on the resistance welding machine, and the base plate is fixedly mounted on the insulating positioning plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The riveting and welding fixture designed in this utility model is suitable for riveting and welding the central upper bracket assembly of the front bumper on a resistance welding machine. The fixture is used for positioning welding, which has the advantages of high welding accuracy and good product consistency. At the same time, it also improves production efficiency and reduces labor intensity. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0016] Figure 1 This is a top view of the riveting and welding fixture provided by this utility model;

[0017] Figure 2 This is an AA sectional view of the riveting and welding fixture provided by this utility model;

[0018] Figure 3 This is a structural diagram of the positioning pin provided by this utility model;

[0019] Figure 4 This is a cross-sectional view of the limiting block provided by this utility model;

[0020] Figure 5This is a top view of the riveting and welding fixture provided by this utility model;

[0021] Figure 6 yes Figure 5 The provided riveting and welding fixture has a riveting and welding side view;

[0022] Figure 7 This is a diagram showing the composition of the front bumper central upper bracket assembly provided by this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1—Base plate, 2—Linear guide rail, 3—Support plate, 4—Positioning plate, 4.1—Protruding post, 5—Spring, 6—Positioning pin, 6.1—Guide part, 6.2—Nut positioning part, 6.3—Through hole positioning part, 7—Limiting block, 7.1—Mounting hole, 8—Insulating positioning plate, 10—Resistance welding machine, 10.1—Lower electrode, 10.2—Upper electrode, 20—Bracket assembly, 20.1—Bracket body, 20.1.1—Through hole, 20.2—Fixed bracket, 20.2.1—Nut. Detailed Implementation

[0025] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0028] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] Example 1

[0030] This embodiment provides a riveting and welding fixture for the central upper bracket assembly of the front bumper, which is installed on a resistance welding machine 10. Specifically, a single-phase AC resistance welding machine can be used to weld the bracket body 20.1 and the fixing frame 20.2 to form the bracket assembly 20. This allows the bracket assembly to be precisely welded on the resistance welding machine through the riveting and welding fixture, thereby improving welding efficiency and quality, ensuring product consistency, and reducing the labor intensity of workers.

[0031] As attached Figure 1 To be continued Figure 6 As shown, the riveting and welding fixture includes a base plate 1, a linear guide rail 2, a support plate 3, a positioning plate 4, springs 5, and positioning pins 6. The base plate 1 is mounted on the resistance welding machine 10. The linear guide rail 2 is horizontally fixed to the base plate 1. The support plate 3 is fixedly mounted on the slider of the linear guide rail 2. The positioning plate 4 is positioned above the support plate 3, and multiple springs 5 ​​are arranged between the positioning plate 4 and the support plate 3. Multiple bolts pass through the positioning plate 4, the springs 5, and are screwed to the support plate 3. The positioning plate 4 has protrusions 4.1 at both ends near the electrode side of the resistance welding machine 10, which can support the bracket body 20.1. The electrode is located between the two protrusions. The positioning pins 6 are detachably installed inside the protrusions 4.1 and are used to position the bracket body 20.1 and the fixing frame 20.2.

[0032] Preferred options are listed below. Figure 3 As shown, the positioning pin 6 is arranged from top to bottom as a guide part 6.1, a nut positioning part 6.2 and a through hole positioning part 6.3. The outer diameter of the nut positioning part 6.2 is equal to the inner diameter of the nut 20.2.1 on the fixing frame 20.2, and the outer diameter of the through hole positioning part 6.3 is equal to the diameter of the through hole 20.1.1 on the bracket body 20.1.

[0033] Preferably, the detachable structure of the positioning pin in this embodiment is as follows: Figure 2 As shown, the protrusion 4.1 is provided with an insertion hole, and the bottom of the positioning pin 6 is inserted into the insertion hole and locked by the set screw on the side of the protrusion.

[0034] Working principle: as shown in the appendix Figure 5 and attached Figure 6As shown, the riveting fixture is installed on the resistance welding machine. At this time, the lower electrode 10.1 of the resistance welding machine is located between the two protrusions of the positioning plate and slightly lower than the upper surface of the protrusions. The upper electrode 10.2 is directly above the lower electrode and located above the protrusions. During welding, align the two through holes of the bracket body with the positioning pins and place them on the protrusions; then align the nuts at both ends of the fixing bracket with the positioning pins and place them on the bracket body; move the positioning plate to one end to a suitable position, control the upper electrode to move downward, and continue to move downward after the upper electrode contacts the fixing bracket (at this time, the spring is compressed) until the bracket body contacts the lower electrode, completing the welding; after welding is completed at one end of the fixing bracket, move the positioning plate to the other end to a suitable position and continue to complete the welding of the other end of the fixing bracket according to the above operation.

[0035] Example 2

[0036] Based on Example 1, as shown in the appendix Figure 1 As shown, this embodiment also includes a limiting block 7, which is located at both ends of the linear guide rail 2 and fixedly mounted on the base plate 1. This limiting block is used to limit the travel of the positioning plate at both ends. By setting limiting blocks on both sides of the positioning plate for positioning, and limiting the movement distance of the positioning plate, this embodiment ensures that the welding position of each product is uniform, thus guaranteeing product consistency.

[0037] Preferred options are listed below. Figure 4 As shown, the limiting block 7 is L-shaped, and its base plate is provided with an oval mounting hole 7.1. During installation, the fixing bolt passes through the mounting hole and fixes it to the base plate. Since the mounting hole is designed as an oval hole, the installation position of the limiting block can be adjusted to realize the adjustment of the welding point.

[0038] Example 3

[0039] Based on Example 1 or Example 2, as shown in the appendix Figure 6 As shown, this embodiment also includes an insulating positioning plate 8, which is mounted on the resistance welding machine 10, and the base plate 1 is fixedly mounted on the insulating positioning plate 8. The insulating positioning plate in this embodiment can be made of bakelite material to isolate the riveting and welding fixture from the resistance welding machine, ensuring welding insulation, preventing current shunting, and improving operational safety.

[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A riveting and welding fixture for a front bumper center upper bracket assembly, used to weld the bracket body and the fixing frame to form a bracket assembly; characterized in that: The riveting and welding fixture is installed on the resistance welding machine and includes a base plate, a linear guide rail, a support plate, a positioning plate, a spring, and a positioning pin, wherein: The base plate is mounted on the resistance welding machine; The linear guide rail is fixed laterally to the base plate; The tray is fixedly installed on the slider of the linear guide rail; The positioning plate is located above the support plate, and multiple springs are installed between the positioning plate and the support plate. Multiple bolts pass through the positioning plate, springs and the support plate. The positioning plate has protruding posts at both ends on the side of the resistance welding machine near the electrode that can support the support body. The electrode is located between the two protruding posts. The positioning pin is detachably installed inside the protruding column and is used to position the bracket body and the fixing frame.

2. The riveting and welding fixture according to claim 1, characterized in that: The positioning pin is configured from top to bottom as a guide part, a nut positioning part, and a through hole positioning part. The outer diameter of the nut positioning part is equal to the inner diameter of the nut on the fixing frame, and the outer diameter of the through hole positioning part is equal to the diameter of the through hole on the bracket body.

3. The riveting and welding fixture according to claim 2, characterized in that: The protruding post is provided with an insertion hole, and the bottom of the positioning pin is inserted into the insertion hole and locked by the set screw on the side of the protruding post.

4. The riveting and welding fixture according to claim 1, characterized in that: It also includes limiting blocks, which are located at both ends of the linear guide rail and fixedly installed on the base plate, for limiting the travel of the left and right ends of the positioning plate.

5. The riveting and welding fixture according to claim 4, characterized in that: The limiting block is L-shaped, and its bottom plate has oval-shaped mounting holes.

6. The riveting and welding fixture according to any one of claims 1 to 5, characterized in that: It also includes an insulating positioning plate, which is installed on the resistance welding machine, and the base plate is fixedly installed on the insulating positioning plate.

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