Welding fixture is a kind of process equipment which can accurately locate and reliably clamp weldments, facilitate the assembly and welding of weldments and ensure the structural accuracy of weldments. In modern welding production, it is very important to actively popularize and use fixtures suitable for product structure to improve product quality, reduce labor intensity of workers and accelerate mechanization and automation of welding production.

In the welding production process, welding requires less working hours, and more than 2/3 of the total working hours are used for auxiliary work such as material preparation and assembly, which greatly affects the welding production speed. Therefore, it is necessary to vigorously promote the use of assembly welding technology and equipment with high mechanization and automation.

The main functions of welding fixture are as follows:

(1) Accurate and reliable positioning and clamping can reduce or even cancel blanking and marking. Reduce the size deviation of products and improve the accuracy and interchangeability of parts.

(2) Welding deformation is effectively prevented and alleviated.

(3) The workpiece is in the best welding position, the weld formability is good, the process defects are obviously reduced, and the welding speed is improved.

(4) Mechanical devices are used to replace the heavy work such as positioning, clamping and workpiece turning when assembling parts by hand, which improves the working conditions of workers.

(5) It can expand the application scope of advanced process methods and promote the all-round development of mechanization and automation of welding structure production.