What requirements should the design of welding fixture satisfy?

Author：Web　Source：Web　Date：2018-07-28 15:02:12　Sentiment：75

With the popularization of automobile, the demand for fixture in automobile manufacturing is also increasing. Among them, the welding fixture of automobile has been favored by automobile manufacturers due to its excellent performance advantages. In brief, welding fixture is an important factor to ensure the welding quality of car body, and its function is to guarantee the relative position between all welding stamping parts and the dimension precision after welding. Below the professional personnel of hua Yang yu guang wants to satisfy what requirement to car welding fixture design.

1. Standardization of welding fixture and modularization of fixture elements are the basis for combination. The modular design of serialized, standardized fixture components, the rapid assembly of various fixtures, has become the basis of fixture technology development. Save industry and time, save material and energy, embodied in the innovation of various advanced fixture systems. Modular design lays a foundation for fixture design and assembly.

2. Structure features of welding fixture: the body welding fixture has a large volume and complex structure. In order to facilitate manufacturing, assembly, inspection and maintenance, the fixture structure must be decomposed, otherwise, it cannot be measured. Each fixture has its own reference coordinate, and each component is assembled together according to the reference. The welding fixture of automobile is generally divided into three parts: floor, left side and right side. In this way, there are three assembly datum, and the oil datum groove and coordinate line are processed on their respective floors. Each small unit is assembled and tested according to its own datum. Finally, the three parts are combined to form a complete set of welding fixtures.

3, the control of welding fixture requirements: the workpiece welding often in between the two or three parts, each have multiple artifacts, subassembly or assembly fixture clamping point is generally more so, resistance welding is a high efficient welding technology, in order to reduce the auxiliary time of loading and unloading workers, clamping should adopt efficient fast device and multipoint linkage mechanism. The clamping force is mainly used to maintain the relative position of the workpiece assembly, overcome the elastic deformation of the workpiece and make it fit with the positioning support or conductive electrode. According to the operation mode, it can be divided into manual tightening, pneumatic tightening and hydraulic tightening. The tightening head is usually made of steel plate or nylon material to suit different workpiece requirements.

4, welding fixture positioning requirement: welding jig separately to each be welding position, and make it do not interfere with each other, and artifacts usually use hole positioning, there are a lot of workpiece shape is complicated, it is to a great extent, determines its positioning components, shape is special in design to make full use of the workpiece positioning device assembly dependencies as natural supporting each other.

What requirements should be satisfied in the design of welding fixture of automobile shall be Shared here today. In addition to the design points of welding fixture of automobile, the quality of welding fixture of automobile body must be guaranteed first. Factors that affect the quality of welding fixture of automobile also include manufacturing, installation, debugging and testing, etc.