Part Name: SIDE FRAME R/L, Front BACK
Material Grade: SPFC590
Material Size: 1.20mm x 964mm x 164mm
Process: 800T Progression tool
Cavity: R and L part out
Technical Challenge: Negative angle forming
◆Application: The part applicated to automotive seat part
Press Machine: 2000T hydraulic press, 1200T Mechanical
Inspection Tool: Checking fixture, CMM, Blue scanner
Lead Time: 4 months
◆Part Quality: Potential risk with some of distortion and twist, thus strictly control on both end of the part quality, as well as the whole surface.
Some special angles on the stamping parts make it difficult to bend. This part with a bend less than 90 degrees and cannot be bent in one step. It is usually required to bend to 90 degrees first, then bend to a negative angle with less than 90 degrees, and finally to cam strike the negative angle and the surrounding emboss. Due to this, we use cams to form negative angle in blank holder and cam bend stage. Since the shape of part with negative angle, the reason why cam pierce prior to cam bend is that scrap falling out concern, otherwise the scrap will fall into the cam which cause in scrap built up.
This part is long, potential risk with some of distortion and twist on both end of the part, thus strictly tolerance control in these areas, as well as the center whole surface. Besides, material grade of this part is high tensile steel, concern over spring back during cam bend, we add a cam strike process to improve spring back.
For complex stamping parts with negative angles, cams are mainly used to solve the forming problem. And in the future part with similar negative angles, we hope to explore and study a better and faster process to make negative angle forming.
If you are interested in negative angle process or have similar seat parts, please don’t hesitate to contact us, we will be pleased to discuss with you.