Using a punch with micro-ridges to shorten the multistage deep drawing process for stainless steels

作者：Lin Bor Tsuen^*; Yang Cheng Yu

来源：International Journal of Advanced Manufacturing Technology, 2017, 88(9-12): 2693-2703.

DOI：10.1007/s00170-016-8928-2

• Multistage deep drawing
• Micro-ridge
• Sheet metal
• Finite element simulation

The manufacture of deep drawn parts involves many stages, which results in high costs. Therefore, the design goal for these processes is to reduce the number of stages. This study used punches with micro-ridges to simplify the multistage deep drawing process for stainless steel. To achieve this objective with minimal changes, the characteristics (i.e., the high drawing ratio) of punches with micro-ridges are leveraged to replace two stages of a deep drawing process that uses a punch without micro-ridges with one stage that uses a punch with micro-ridges. Using DEFORM 2D software, the multistage deep drawing process for a stainless steel vibration motor casing that is manufactured using a six-stage deep drawing process is simulated. The punch that does not have micro-ridges (used in the first and fifth stages) is replaced with a punch that has micro-ridges, which eliminates the second and sixth stages of the initial process, so the six-stage deep drawing process is reduced to four stages. The simulation results show that the punch that has micro-ridges allows fabrication and this is subsequently verified through experimental testing. The analysis and test results show that using the punch with micro-ridges enables two stages of the initial deep drawing process to be eliminated, which reduces the overall thinning rate and forming load for the process. The test results are also consistent with those from the simulation analysis.

• 出版日期2017-2