Matric Analysis and Experimental Design of Offner Stretcher

Xiaoyang, 郭晓杨 Guo; Yuxin, 冷雨欣 Leng; Yi, 许毅 Xu; Wenkai, 黎文开 Li; Xiaoming, 陆效明 Lu; Yujie, 彭宇杰 Peng; Jun, 陆俊 Lu; Cheng, 王乘 Wang; Ruxin, 李儒新 Li

doi:10.3788/aos201535.0714001

Cited by 1 publication

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“…The eccentricity expanding-diameter deformation characteristics of elbow made by expanding diameter and pushing bend is different from that of elbow made by bending elbow pipe by induction heating, the metal rhoelogical property of elbow from belly region to back region assure elbow uniformity wall thickness. This is plasticity deformation theory of elbow with uniformity wall thickness and constant strength made by expanding diameter and pushing bend [10] .…”

Section: Tension Deformation On Circumference Directionmentioning

confidence: 99%

Forming Parameter Design and Thickness Uniformity Control of Short Radius Elbow Made by Expanding Diameter and Pushing Bend

Yang

Wang

2014

MSF

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The forming theory of elbow made by expanding diameter and pushing bend is introduced in this paper. The tube blank of elbow takes place combined deformation with compression deformation in the axial direction and in the circumferential direction. The compression deformation in the axial direction makes tube bending deformation under the restricted condition of ram-shape die, then the belly metal of elbow thicken after compression deformation, while the back metal of elbow don’t take part in deformation. The eccentric expanding diameter in the circumference direction ensures the thickened wall thickness flowing favorably from elbow belly to elbow back and supplying the reduced wall thickness of back elbow. Comparatively, the compression deformation and expanding diameter deformation of short radius elbow is larger than that of long radius elbow. According to metal flowing law, proper ram-shape die design and pushing rate, increasing heating temperature, improving temperature field distribution and lubrication condition can assure uniformity wall thickness.

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Section: Tension Deformation On Circumference Directionmentioning

confidence: 99%