The springback solution of automotive precision stamping parts 'hardware'

In the manufacturing process, automobiles are composed of thousands of automobile precision stamping parts. The stamping parts are mainly made up of various metal stamping parts, precision hardware accessories, and electronic components. The manufacturing quality of automotive precision stamping parts has a great impact on the quality of the entire vehicle, and is particularly important for cars and various passenger cars. In the manufacture of stamping parts, whether it is for large stamping parts, interior parts, welders, etc. with complicated spatial geometry, or for easy small stamping parts, interior parts, etc., more special inspection fixtures are used (Checking tool for short) As an important testing method, it is used to control the product quality between procedures. Inspection fixture testing has the advantages of rapid, accurate, intuitive, convenient, etc., which is especially suitable for the needs of mass production. After the mid-1980s, with the rapid development of the car and bus industries, the use of stamping parts inspection tools in the Chinese automobile industry has become quite common. The springback of metal stamping parts is a difficult problem to solve for automotive precision stamping parts. At present, there is no good way to solve the springback of stamping parts. We need to further study the springback of stamping parts. So what is the impact on automotive precision? What are the factors for the springback of stamping parts? 1. Material properties. Stamping parts with different strengths on the car body. From ordinary plates to high-strength plates, different plates have different yield strengths. The higher the yield strength of the plate, the easier it is to rebound. Bouncing phenomenon. 2. Material thickness During the forming process, the thickness of the sheet has a great influence on the bending performance. As the thickness of the sheet increases, the springback phenomenon will gradually decrease. This is because as the thickness of the sheet increases, the material involved in plastic deformation increases. , And the elastic recovery deformation also increases, so the springback becomes smaller. 3. The springback of parts with different shapes is very different. For parts with complex shapes, a sequence of shaping is generally added to prevent springback when forming is not in place. Some parts with special shapes are more prone to springback, such as U In the analysis and forming process, springback compensation must be considered for the shaped parts. 4. The blank holder force of the part The blank holder force stamping process is an important process measure. By continuously optimizing the blank holder force, the flow direction of the material can be adjusted and the internal stress distribution of the material can be improved. The increase of blank holder force can make the part drawing more fully, especially the part side wall and the R angle position. If the forming is sufficient, the internal and external stress difference will be reduced, thereby reducing the springback. 5. Drawbeads Drawbeads are widely used in today's processes. The reasonable setting of the drawing position can effectively change the direction of material flow and effectively distribute the feed resistance on the pressing surface, thereby improving the formability of the material. The setting of drawbeads on parts that are prone to springback will make the parts more fully formed, the stress distribution will be more uniform, and the springback will be reduced.