Abstract
Various factors affecting the variable blank holder force (BHF) and punch speed in the circular cup deep-drawing process with forming-speed-dependent characteristics were analyzed in order to determine the optimal control conditions of the process and the effects on the permissible range of forming conditions. The isotropic blank material was assumed to exhibit strain hardening and strain-rate-sensitive characteristics given by σ=Kε·mεn. Effects of material properties and process variables on the fracture and wrinkle limit BHF curves were simulated using an elementary analytical method. The simulated results show that the acceptable drawing range of highly strain-rate-sensitive materials strongly depends on the punch speed. It is confirmed theoretically that there is an optimal process control path in the acceptable range of the punch speed-BHF-drawing progress space even beyond the critical constant punch speed. Based on these results a new concept of optimal process control with variable punch speed and BHF control is proposed in order to reduce the forming time, improve the quality of the products and reduce the number of defective parts produced.
| Original language | English |
|---|---|
| Pages | 175-182 |
| Number of pages | 8 |
| Publication status | Published - 1996 Dec 1 |
| Externally published | Yes |
| Event | Proceedings of the 1996 ASME International Mechanical Engineering Congress and Exposition - Atlanta, GA, USA Duration: 1996 Nov 17 → 1996 Nov 22 |
Other
| Other | Proceedings of the 1996 ASME International Mechanical Engineering Congress and Exposition |
|---|---|
| City | Atlanta, GA, USA |
| Period | 96/11/17 → 96/11/22 |
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ASJC Scopus subject areas
- Software
- Mechanical Engineering
Cite this
Theoretical analysis of punch speed and blank holder force control in deep drawing process of strain-rate-sensitive materials. / Manabe, Ken ichi; Yoshihara, Shouichirou; Nishimura, Hisashi.
1996. 175-182 Paper presented at Proceedings of the 1996 ASME International Mechanical Engineering Congress and Exposition, Atlanta, GA, USA, .Research output: Contribution to conference › Paper
}
TY - CONF
T1 - Theoretical analysis of punch speed and blank holder force control in deep drawing process of strain-rate-sensitive materials
AU - Manabe, Ken ichi
AU - Yoshihara, Shouichirou
AU - Nishimura, Hisashi
PY - 1996/12/1
Y1 - 1996/12/1
N2 - Various factors affecting the variable blank holder force (BHF) and punch speed in the circular cup deep-drawing process with forming-speed-dependent characteristics were analyzed in order to determine the optimal control conditions of the process and the effects on the permissible range of forming conditions. The isotropic blank material was assumed to exhibit strain hardening and strain-rate-sensitive characteristics given by σ=Kε·mεn. Effects of material properties and process variables on the fracture and wrinkle limit BHF curves were simulated using an elementary analytical method. The simulated results show that the acceptable drawing range of highly strain-rate-sensitive materials strongly depends on the punch speed. It is confirmed theoretically that there is an optimal process control path in the acceptable range of the punch speed-BHF-drawing progress space even beyond the critical constant punch speed. Based on these results a new concept of optimal process control with variable punch speed and BHF control is proposed in order to reduce the forming time, improve the quality of the products and reduce the number of defective parts produced.
AB - Various factors affecting the variable blank holder force (BHF) and punch speed in the circular cup deep-drawing process with forming-speed-dependent characteristics were analyzed in order to determine the optimal control conditions of the process and the effects on the permissible range of forming conditions. The isotropic blank material was assumed to exhibit strain hardening and strain-rate-sensitive characteristics given by σ=Kε·mεn. Effects of material properties and process variables on the fracture and wrinkle limit BHF curves were simulated using an elementary analytical method. The simulated results show that the acceptable drawing range of highly strain-rate-sensitive materials strongly depends on the punch speed. It is confirmed theoretically that there is an optimal process control path in the acceptable range of the punch speed-BHF-drawing progress space even beyond the critical constant punch speed. Based on these results a new concept of optimal process control with variable punch speed and BHF control is proposed in order to reduce the forming time, improve the quality of the products and reduce the number of defective parts produced.
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M3 - Paper
SP - 175
EP - 182
ER -