FE analysis of multi-cycle micro-forming through using closed-die upsetting models and forward extrusion models

W. Pan, Y. Qin

Research output: Contribution to journalArticle

9 Citations (Scopus)
160 Downloads (Pure)

Abstract

Research in micro-forming leads to the investigation of the effects of heat generation in the workpiece and temperature changes in the tools during the forming. The results reported in this paper relate to the study of cold micro-forming processes which are usually ignored on its thermal characteristics. Two closed-die upsetting models were used for the simulation of the forming of micro-parts in single forming trial and in mass production (multi-cycle loading), respectively. An elastic-plastic finite element simulation was performed for a single forming trial. The heat transferred to the die, computed from the simulation, was then used as an input for the multi-cycle heat loading analysis in the die. Two materials: silver and low carbon steel, were used as the work material. The results show that the die saturation temperature could still go up to 100 °C for small size dies, which is significant for the forming of micro-parts. Forming errors due to the die-temperature changes were further computed, which forms a basis for developing considerations on the forming-error compensation. Using the same methods and procedures, forming of a micro-pin via forward extrusion was analysed.
Original languageEnglish
Pages (from-to)220-225
Number of pages6
JournalJournal of Materials Processing Technology
Volume201
Issue number1-3
DOIs
Publication statusPublished - 26 May 2008
Event10th International Conference on Advances in Materials and Processing Technologies - AMPT 2007 - Daejeon, Korea, Republic of
Duration: 7 Oct 200711 Oct 2007

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Upsetting (forming)
Extrusion
Die
Cycle
Closed
Model
Heat
Error Compensation
Error compensation
Heat generation
Low carbon steel
Finite Element Simulation
Silver
Temperature
Saturation
Plastics
Steel
Carbon
Simulation

Keywords

  • FE analysis
  • multi-cycle micro-forming
  • closed-die upsetting models
  • forward extrusion models

Cite this

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abstract = "Research in micro-forming leads to the investigation of the effects of heat generation in the workpiece and temperature changes in the tools during the forming. The results reported in this paper relate to the study of cold micro-forming processes which are usually ignored on its thermal characteristics. Two closed-die upsetting models were used for the simulation of the forming of micro-parts in single forming trial and in mass production (multi-cycle loading), respectively. An elastic-plastic finite element simulation was performed for a single forming trial. The heat transferred to the die, computed from the simulation, was then used as an input for the multi-cycle heat loading analysis in the die. Two materials: silver and low carbon steel, were used as the work material. The results show that the die saturation temperature could still go up to 100 °C for small size dies, which is significant for the forming of micro-parts. Forming errors due to the die-temperature changes were further computed, which forms a basis for developing considerations on the forming-error compensation. Using the same methods and procedures, forming of a micro-pin via forward extrusion was analysed.",
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FE analysis of multi-cycle micro-forming through using closed-die upsetting models and forward extrusion models. / Pan, W.; Qin, Y.

In: Journal of Materials Processing Technology, Vol. 201, No. 1-3, 26.05.2008, p. 220-225.

Research output: Contribution to journalArticle

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T1 - FE analysis of multi-cycle micro-forming through using closed-die upsetting models and forward extrusion models

AU - Pan, W.

AU - Qin, Y.

PY - 2008/5/26

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N2 - Research in micro-forming leads to the investigation of the effects of heat generation in the workpiece and temperature changes in the tools during the forming. The results reported in this paper relate to the study of cold micro-forming processes which are usually ignored on its thermal characteristics. Two closed-die upsetting models were used for the simulation of the forming of micro-parts in single forming trial and in mass production (multi-cycle loading), respectively. An elastic-plastic finite element simulation was performed for a single forming trial. The heat transferred to the die, computed from the simulation, was then used as an input for the multi-cycle heat loading analysis in the die. Two materials: silver and low carbon steel, were used as the work material. The results show that the die saturation temperature could still go up to 100 °C for small size dies, which is significant for the forming of micro-parts. Forming errors due to the die-temperature changes were further computed, which forms a basis for developing considerations on the forming-error compensation. Using the same methods and procedures, forming of a micro-pin via forward extrusion was analysed.

AB - Research in micro-forming leads to the investigation of the effects of heat generation in the workpiece and temperature changes in the tools during the forming. The results reported in this paper relate to the study of cold micro-forming processes which are usually ignored on its thermal characteristics. Two closed-die upsetting models were used for the simulation of the forming of micro-parts in single forming trial and in mass production (multi-cycle loading), respectively. An elastic-plastic finite element simulation was performed for a single forming trial. The heat transferred to the die, computed from the simulation, was then used as an input for the multi-cycle heat loading analysis in the die. Two materials: silver and low carbon steel, were used as the work material. The results show that the die saturation temperature could still go up to 100 °C for small size dies, which is significant for the forming of micro-parts. Forming errors due to the die-temperature changes were further computed, which forms a basis for developing considerations on the forming-error compensation. Using the same methods and procedures, forming of a micro-pin via forward extrusion was analysed.

KW - FE analysis

KW - multi-cycle micro-forming

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KW - forward extrusion models

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