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Modelling of Friction Phenomena Existed in Drawbead in Sheet Metal Forming
Tomasz Trzepieciński1, Andrzej Kubit1, Romuald Fejkiel2
1Department of Manufacturing and Production Engineering, Rzeszow University of Technology, al. Powst. Warszawy 8, 35-959 Rzeszów, Poland.
Materials (Basel, Switzerland)
|October 13, 2021
Summary
Friction tests on DC04 steel showed that increasing drawbead height raises the coefficient of friction (COF). A specific lubricant, Heavy Draw 1150, proved more effective at reducing friction than machine oil.
Area of Science:
- Materials Science
- Mechanical Engineering
- Tribology
Background:
- Sheet metal forming processes like deep drawing involve complex friction phenomena.
- Understanding and controlling friction during sheet metal forming is crucial for product quality and process efficiency.
Purpose of the Study:
- To investigate the influence of various parameters on the coefficient of friction (COF) during sheet metal forming.
- To develop and analyze a friction model using artificial neural networks (ANNs).
Main Methods:
- Friction tests were conducted using a specialized simulator mimicking drawbead conditions.
- Variable parameters included surface roughness, lubrication, sample orientation, and drawbead geometry.
- Artificial neural networks (ANNs) with four training algorithms (back propagation, conjugate gradients, quasi-Newton, Levenberg-Marquardt) were employed to model friction.
Main Results:
- Increased drawbead height consistently led to a higher COF across all tested conditions and strip widths.
- The chlorine-based lubricant (Heavy Draw 1150) demonstrated superior friction reduction capabilities compared to LAN-46 machine oil.
Conclusions:
- Drawbead height is a significant factor influencing friction in DC04 steel sheet forming.
- The choice of lubricant plays a critical role in managing friction, with Heavy Draw 1150 offering better performance.
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