Effect of offset on the blade stress in tube roll-cutting process
The main objective of this study is to obtain the reasonable range of offset in tube roll-cutting process by analyzing the effect of the process kinematics. For this aim, the roll-cutting processes are simulated. Due to the existence of the offset, the relative feed speed of blade is not constant. In this paper, the relationship between the radial feed speed shock of a blade relative to the tube and the offset is introduced. The effects of offset on the roll-cutting force and the blade stress have been analyzed. Regarding the stress of the blade, the offset should be less than 0.15mm for Φ76×3.5mm tube with the blade radial displacement per cycle as 1.0 mm.
STUDY ON PNEUMATIC ROLL-CUTTING SHEARERFOR SMALL TUBES
In this article, the roll-cutting and grip forces are investigated by the cutting theory and the slip line theory. A new pneumatic roll-cutting shearer has been designed for small tubes.
Experimental Study on High Speed Milling Force of Quench Steel Cr12MoV
High speed milling quench steel Cr12MoV was studied.The effect of milling conditions and tool wear on milling force is focused on.The results show that effects of the ways of milling and lubricating,helix angle of tool on milling forces are different.The milling force increases with tool wear. Meanwhile,it markedly increases with milling speed.Not only high speed milling quench steel ensures quality of manufactured surface,but only it can obtain high production efficiency.