Automobile beam welding tool

Abstract

The utility model relates to the field of welding tools, and discloses an automobile beam welding tool which comprises a rectangular frame-shaped lower bracket and a #-shaped frame-shaped upper bracket, the upper bracket is fixed at the upper end of the middle of the lower bracket, the left end and the right end of the upper bracket are exposed outside the left end and the right end of the lower bracket, and a tray is fixed at the bottom of the middle section of the lower bracket. Four clamping pins are annularly and uniformly distributed at the bottom of the tray, and longitudinal pin bushes and transverse pin bushes are alternately distributed among the four clamping pins; supporting seats are fixed to the front end and the rear end of the lower bracket correspondingly, and end pressing plates used for pressing the cross beam are arranged on the supporting seats. The left end and the right end of the upper bracket are each provided with a side pressing plate used for pressing the cross beam, and the upper bracket is further provided with a positioning piece used for positioning the cross beam. And supporting blocks for supporting the bottom of the cross beam are arranged at the top ends of the upper bracket and the lower bracket. The clamping device can be used for welding and clamping the automobile cross beam and can be matched with a welding robot to realize flexible and efficient welding.

Description

Technical Field

[0001] This utility model relates to the field of welding fixtures, specifically to a welding fixture for automotive crossbeams. Background Technology

[0002] The automotive crossbeam is one of the main supporting structures of the automotive chassis, primarily used to connect the left and right sides of the vehicle's frame or body components. It enhances body rigidity, supports other components, and improves collision safety. Automotive crossbeams are mainly formed by welding together sheet metal. The welding process involves positioning and clamping the sheet metal using tooling fixtures, followed by welding. In existing technologies, the tooling is fixed to the ground, and welding is performed by workers or robotic arms around the tooling. This typically requires multiple workers or robotic arms to perform welding operations simultaneously, resulting in high welding costs. Sometimes, after one station completes welding, it must wait for other stations to finish before proceeding to the next step, leading to low overall welding efficiency. Utility Model Content

[0003] The present invention aims to provide a welding fixture for automotive crossbeams, which can be used to clamp and weld automotive crossbeams and can be used in conjunction with a welding robot to achieve flexible and efficient welding.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a welding fixture for automotive crossbeams, comprising a rectangular frame-shaped lower bracket and a grid-shaped upper bracket. The upper bracket is fixed to the upper middle part of the lower bracket, with the left and right ends of the upper bracket protruding outside the left and right ends of the lower bracket. A tray is fixed to the bottom of the middle section of the lower bracket, and four clamping pins are evenly distributed in a ring at the bottom of the tray. Longitudinal and transverse pin sleeves are alternately distributed among the four clamping pins. Support seats are fixed to the front and rear ends of the lower bracket, and end pressure plates for pressing the crossbeam are provided on the support seats. Side pressure plates for pressing the crossbeam are provided on the left and right ends of the upper bracket, and positioning components for positioning the crossbeam are also provided on the upper bracket. Support blocks for supporting the bottom of the crossbeam are provided at the top of both the upper and lower brackets.

[0005] Preferably, as an improvement, two support seats are provided at each of the front and rear ends of the lower bracket, and a support plate is fixed between the bottom of each support seat and the lower bracket, with lifting holes provided on the support plate.

[0006] Preferably, as an improvement, both the end pressure plate and the side pressure plate are strip plates, one end of which is the pressing end and the other end is the adjusting end. The adjusting end is provided with a threaded hole and connected with an adjusting bolt. The middle part of the strip plate is provided with a strip hole. The lower bracket and the upper bracket are provided with a support screw that passes through the strip hole vertically. A limit nut is connected to the support screw.

[0007] Preferably, as an improvement, the positioning element includes a lateral positioning element and a longitudinal positioning element. The longitudinal positioning element consists of two locating pins arranged side by side, and the lateral positioning element and the locating pins are respectively located on the two lateral side frames of the upper bracket in a grid pattern.

[0008] Preferably, as an improvement, the lateral positioning element includes a lateral support fixed to the upper bracket, and a positioning bolt is laterally threaded onto the lateral support.

[0009] Preferably, as an improvement, the bottom of both the front and rear ends of the lower bracket is fixed with support feet.

[0010] The principle and advantages of this solution are as follows: In practical application, the upper and lower brackets form the main support structure for clamping and positioning the automotive crossbeam. The upper bracket is superimposed on the middle of the lower bracket to form a vertical spatial structure that conforms to the curved shape of the crossbeam. The support block serves as the bottom support for the crossbeam, ensuring stable and reliable support at the bottom. The support plate provides structural reinforcement to the support seat, and the lifting holes on the support plate are used for lifting the entire tooling. The positioning pin sleeve on the upper bracket cooperates with the process holes on the crossbeam to achieve longitudinal positioning of the crossbeam. Then, the positioning bolts on the lateral support seat are used to laterally tighten the crossbeam, completing the longitudinal and lateral positioning of the crossbeam. The support seat provides clamping support for the end of the crossbeam, and the end pressure plate, together with the end pressure plate, presses and positions the end of the crossbeam. The side pressure plate on the upper bracket presses and positions the side end of the crossbeam, thus achieving vertical pressing and positioning of the crossbeam, thereby ensuring the stability of the crossbeam during welding. When in use, the tooling is placed on the ground or a material rack via the support feet at the bottom. The bottom tray serves as the mounting and positioning structure for the tooling when used in conjunction with the welding robot. The welding station of the welding robot includes a robotic arm and a tooling base. A motor is fixed on the tooling base, with the motor's output shaft vertically upward and bolted to a quick-change connector. The quick-change connector has pin holes and connecting pins that mate with clamping pins, longitudinal pin sleeves, and transverse pin sleeves. The tray facilitates the connection and installation of the tooling and the quick-change connector. During the welding process, after the robotic arm completes the welding of the crossbeam section, the motor drives the tooling to rotate, moving the unwelded parts within the robotic arm's operating range for continued welding. This invention provides stable and reliable multi-point positioning and clamping of the crossbeam, and allows for flexible welding processing in conjunction with the welding robot. By incorporating a structure on the tooling that connects to the quick-change connector, the tooling can be rotated in situ, thus requiring only one robotic arm to complete the welding of the crossbeam. This reduces equipment costs and improves overall welding efficiency. Attached Figure Description

[0011] Figure 1 This is an isometric view of the clamping beam in an embodiment of this utility model.

[0012] Figure 2 This is a top view of the clamping beam in an embodiment of the present invention.

[0013] Figure 3 This is a bottom view of the clamping beam in an embodiment of the present invention.

[0014] Figure 4 This is a side view of the clamping beam in an embodiment of the present invention. Detailed Implementation

[0015] The following detailed description illustrates the specific implementation method:

[0016] The reference numerals in the accompanying drawings include: lower bracket 1, upper bracket 2, support leg 3, support base 4, support plate 5, lifting hole 6, end pressure plate 7, support screw 8, support block 9, side pressure plate 10, positioning bolt 11, lateral support base 12, limit nut 13, adjusting bolt 14, tray 15, clamping pin 16, transverse pin sleeve 17, longitudinal pin sleeve 18, positioning pin 19, ear plate 20, and crossbeam 21.

[0017] The basic implementation examples are as follows: Figure 1 As shown: A welding fixture for an automotive crossbeam includes a rectangular lower support 1 and a grid-shaped upper support 2. The upper support 2 is welded and fixed to the upper middle part of the lower support 1. The left and right side frames of the upper support 2 are vertically aligned with the left and right side frames of the lower support 1. The ends of the front and rear side frames of the upper support 2 extend to the outside of the left and right side frames of the lower support 1. Figure 3 , Figure 4 As shown, a tray 15 is welded and fixed to the bottom of the middle section of the lower bracket 1. Four clamping pins 16 are evenly distributed in a ring on the bottom of the tray 15. In this embodiment, all four clamping pins 16 are SPC40-16 type SCHUNK pins. Longitudinal pin sleeves 18 and transverse pin sleeves 17 are alternately distributed among the four clamping pins 16. The longitudinal pin sleeves 18 and transverse pin sleeves 17 are connected to the tray 15 by screws. The pin hole of the longitudinal pin sleeve 18 is a vertical hole with the opening facing downwards, and the pin hole axis of the transverse pin sleeve 17 is parallel to the length direction of the lower bracket 1.

[0018] Support seats 4 are welded and fixed at both the front and rear ends of the lower bracket 1. There are two support seats 4 at each of the front and rear ends of the lower bracket 1. A support plate 5 is welded and fixed between the bottom of each support seat 4 and the lower bracket 1. The support plate 5 has a lifting hole 6. The support seat 4 is provided with an end pressure plate 7 for pressing the crossbeam 21. The left and right ends of the upper bracket 2 are provided with side pressure plates 10 for pressing the crossbeam 21. The end pressure plate 7 and the side pressure plate 10 are both strip plates. One end of the strip plate is the pressing end and the other end is the adjusting end. The adjusting end is provided with a threaded hole and connected to an adjusting bolt 14. The middle of the strip plate is provided with a strip hole. The lower bracket 1 and the upper bracket 2 are provided with a vertical support screw 8 passing through the strip hole. A limit nut 13 is connected to the support screw 8.

[0019] Combination Figure 2As shown, the upper bracket 2 is also equipped with positioning components for positioning the crossbeam 21. These positioning components include lateral positioning components and longitudinal positioning components. The longitudinal positioning components consist of two parallel positioning pins 19, which are threaded onto the upper bracket 2. The lateral positioning components and the positioning pins 19 are located on the two lateral side frames of the upper bracket 2 in a grid pattern. The lateral positioning components include lateral support seats 12 bolted to the upper bracket 2, with positioning bolts 11 threaded laterally onto the lateral support seats 12.

[0020] Support feet 3 are welded and fixed at the bottom of both the front and rear ends of the lower bracket 1; support blocks 9 for supporting the bottom of the crossbeam 21 are bolted to the top of both the upper bracket 2 and the lower bracket 1.

[0021] The specific implementation process is as follows: When ready for use, the fixture is placed on the ground or on a material rack via the bottom support feet 3. During use, the fixture is hoisted to the ground via the hoisting holes 6 on the support plate 5, and the automotive crossbeam 21 to be welded is then hoisted onto the fixture. Figures 1-4 As shown, adjust the position of the crossbeam 21 so that the ear plate 20 reserved on the side end of the crossbeam 21 cooperates with the positioning pin 19 to achieve longitudinal positioning of the crossbeam 21. Then, by tightening the positioning bolt 11 on the lateral support seat 12, the crossbeam 21 is laterally pressed against the side end of the positioning pin 19 to achieve lateral clamping of the crossbeam 21. During the process, observe to ensure that the crossbeam 21 is located on the support seat 4. Then, by adjusting the adjusting bolt 14 and the limiting nut 13, the pressing ends of the end pressure plate 7 and the side pressure plate 10 vertically press the crossbeam 21 onto the support block 9 to achieve vertical clamping of the crossbeam 21, thereby ensuring that the crossbeam 21 is accurately positioned and stably clamped. Then, the tooling and crossbeam 21 are hoisted to the welding station through the hoisting hole 6. The welding robot station includes a welding robotic arm and a tooling base. In the prior art, the tooling base usually includes a seat body. A motor with a vertically upward rotating shaft is bolted into the seat body. The motor shaft is keyed to a disc-shaped quick-change connector. The quick-change connector has pin holes and pins that match the clamping pin 16, longitudinal pin sleeve 18, and transverse pin sleeve 17 on the pallet 15 of this solution. During hoisting, the pallet 15 is aligned with the quick-change connector and gradually lowered, so that the clamping pin 16, longitudinal pin sleeve 18, and transverse pin sleeve 17 are connected to the quick-change connector to achieve positioning and transverse connection. It will not fall off the tooling base without being affected by external forces. The fixture with the crossbeam 21 is stably placed on the fixture base. Then, the welding operation is performed by programming the welding robot arm. After the weld seam within the operating range of the welding robot arm is completed during the welding process, the quick-change connector and the fixture are rotated in place by the motor, so that the clamped crossbeam 21 is rotated and the part to be welded enters the operating range of the welding robot arm, and then the welding process of the crossbeam 21 is completed.

[0022] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A welding fixture for automotive crossbeams, characterized in that: It includes a rectangular frame-shaped lower bracket and a grid-shaped frame-shaped upper bracket. The upper bracket is fixed to the upper middle part of the lower bracket, and the left and right ends of the upper bracket protrude outside the left and right ends of the lower bracket. A tray is fixed to the bottom of the middle section of the lower bracket. Four clamping pins are evenly distributed in a ring at the bottom of the tray. Longitudinal pin sleeves and transverse pin sleeves are alternately distributed among the four clamping pins. Support seats are fixed to the front and rear ends of the lower bracket. The support seats are equipped with end pressure plates for pressing the crossbeam. Side pressure plates for pressing the crossbeam are provided at the left and right ends of the upper bracket. The upper bracket is also equipped with positioning parts for positioning the crossbeam. Support blocks for supporting the bottom of the crossbeam are provided at the top of both the upper and lower brackets.

2. The automotive crossbeam welding fixture according to claim 1, characterized in that: The support base is provided at both the front and rear ends of the lower bracket, and a support plate is fixed between the bottom of each support base and the lower bracket. The support plate is provided with a hoisting hole.

3. The automotive crossbeam welding fixture according to claim 2, characterized in that: Both the end pressure plate and the side pressure plate are strip plates. One end of the strip plate is the pressing end and the other end is the adjusting end. The adjusting end is provided with a threaded hole and connected with an adjusting bolt. The middle part of the strip plate is provided with a strip hole. The lower bracket and the upper bracket are provided with a support screw that passes through the strip hole vertically. A limit nut is connected to the support screw.

4. The automotive crossbeam welding fixture according to claim 3, characterized in that: The positioning components include lateral positioning components and longitudinal positioning components. The longitudinal positioning components are two positioning pins arranged side by side. The lateral positioning components and positioning pins are located on the two lateral side frames of the upper bracket in a grid pattern.

5. The automotive crossbeam welding fixture according to claim 4, characterized in that: The lateral positioning component includes a lateral support fixed to the upper bracket, and a positioning bolt is threadedly connected to the lateral support.

6. The automotive crossbeam welding fixture according to claim 5, characterized in that: The bottom of the front and rear ends of the lower bracket are fixed with support feet.

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