Influence of forging parameters on tool temperature in hot forging

Akihiro Minami¹, Yasuo Marumo², Hiroyuki Tanaka², Liqun Ruan², Hiroyuki Saiki²

¹Department of Mechanical Engineering, Ariake National College of Technology,150 Higashihagio, Omuta, Fukuoka 836-8585, Japan.
²Department of Mechanical System Engineering, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan.

DOI:

https://doi.org/10.7494/cmms.2007.2.0145

Abstract:

The evaluation of the temperature distribution in the tool surface layer has been strongly required to enable the accurate prediction of the tool life in tool design. The variation in the maximum temperature of a forging tool during hot forging was examined with respect to friction shear factor m, chamfer angle θ, corner radius R and contact time tc, by finite element analysis. Friction shear factor m greatly influenced the variation in the maximum temperature. In particular, the temperature rise at 80% reduction in area was considerable at m = 0.0-0.2. When the reduction in area exceeded approximately 80%, it was necessary to control the shear friction factor to less than 0.3. When the radius of the corner became more than 2 mm, the rise in the maximum temperature was effectively prevented. This effect was more marked when = 0o than when θ = 30o. The maximum temperature of forging tools can be controlled by selecting the friction shear factor (lubrication or surface modification), the chamfer angle and the corner radius appropriately. A guideline for selecting appropriate conditions in forging process design was presented on the basis of the obtained results.

Cite as:

Minami, A., Marumoa, Y., Tanaka, H. Ruan, L., & Saiki, H. (2007). Influence of forging parameters on tool temperature in hot forging. Computer Methods in Materials Science, 7(2), 212 – 217. https://doi.org/10.7494/cmms.2007.2.0145

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