Transactions of FAMENA, Vol. 47 No. 4, 2023.
Izvorni znanstveni članak
https://doi.org/10.21278/TOF.474053423
A Novel Temperature Model of Regions Formed during the Preheating Stage of Belt Heating in Incremental Sheet Forming
Zhengfang Li
; School of Mechanical and Electrical Engineering, Kunming University, Kunming, China
Zhengyuan Gao
; School of Mechanotronics and Vehicle Engineering, Chongqing Jiaotong University, Chongqing, China
*
Zhiguo An
; School of Mechanotronics and Vehicle Engineering, Chongqing Jiaotong University, Chongqing, China
Yanping Sun
; School of Mechanical and Electrical Engineering, Kunming University, Kunming, China
Bin Wu
; School of Mechanical and Electrical Engineering, Kunming University, Kunming, China
Youwen Zhai
; School of Mechanical and Electrical Engineering, Kunming University, Kunming, China
* Dopisni autor.
Sažetak
The temperature of a forming region has a gradient distribution characteristic in the belt heating incremental sheet forming process, in which the relation between the heating power and the temperature distribution is ambiguous in the pre-heating stage. The setup of the heating power is therefore challenging, and the whole forming efficiency might decrease due to the above issue. Therefore, this paper proposes a belt heating method for electric conduction heating and presents a temperature calculation model for the forming region of the plate in the preheating state based on the heat conduction model. The calculated accuracy of the model is analysed through physical experiments, and the thermal transfer efficiency of heating tubes is analysed in detail. Based on the result, the thermal transfer efficiency value for heating tubes is determined to improve the accuracy of the suggested model. In addition, the effect of the model slope on the calculated result is further analysed, and the setting method of the slope value for the model is proposed according to different accuracy requirements.
Ključne riječi
incremental sheet forming; temperature model; hot forming; pre-heating process; belt heating
Hrčak ID:
308275
URI
Datum izdavanja:
28.9.2023.
Posjeta: 1.011 *