A welding fixture used for positioning the end plate of the rear longitudinal beam of the floor assembly

Abstract

The invention relates to a welding fixture for positioning back longitudinal beam end plates of a baseplate assembly, which is used for fixing and supporting left and right back longitudinal beam end plates of the baseplate assembly. The welding fixture comprises a cross beam, thread pins, and a pair of adjustable positioning surface components arranged at the two ends of the cross beam, wherein the pair of adjustable positioning surface components can move on the cross beam to change the distance therebetween; the thread pins are arranged on the adjustable positioning surface components; and the left and right back longitudinal beam end plates are respectively positioned and fixed on the adjustable positioning surface components through the thread pins. Compared with the prior art, as the threads pin on two sets of adjustable positioning surface components fit thread holes in the left and right back longitudinal beam end plates, the set sizes of the left and right back longitudinal beam end plates can be determined; in addition, because of the support effect of the cross beam, the Y-direction inclination and the twist of the left and right back longitudinal beam end plates can be prevented, and the control of the degree of freedom of parts can be guaranteed; and the welding fixture has such advantages as convenience for operation and loading / unloading.

Description

technical field [0001] The invention relates to the field of automobile longitudinal beam processing, in particular to a welding fixture used for positioning rear longitudinal beam end plates of a floor assembly. Background technique [0002] At present, the control of the structural size of the car body basically depends on the positioning accuracy of the welding fixture. Most of the dimensions of the car body can be guaranteed by the welding fixture. The Y direction of the end plate lacks the necessary control means. If the positioning is directly added to the existing welding fixture, it will not only affect the welding production, but also waste time and effort. [0003] In the prior art, due to the above-mentioned reasons, the size of the rear longitudinal beam of the car body after welding is unstable, and the functional size is sometimes out of tolerance, resulting in deviations in matching in the subsequent assembly, thereby affecting the overall quality of the produ...

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Problems solved by technology

[0002] At present, the control of the structural size of the car body basically depends on the positioning accuracy of the welding fixture. Most of the dimensions of the car body can be guaranteed by the welding fixture. The Y direction of the end plate lacks the necessary control means. If the positioning is directly added to the existing welding fixture, it will not only affect the welding production, but also time-consuming and laborious

[0003] In the prior art, due to the above-mentioned reasons, the size of the rear longitudinal beam of the car body after welding is unstable, and the functional size is sometimes out of tolerance, resulting in deviations in matching in the subsequent assembly, thereby affecting the overall quality of the product. Meet the quality requirements of customers, which has caused adverse effects on both customers and manufacturers

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