高速伸線機の張力変動とダイスの摩耗について

抄録

In a slip type drawing machine, it is difficult to control the drawing conditions which change in accordance with the abrasion of drawing die. In this study, by the use of a slip type drawing machine with two drawing capstans driven individually by 3-phase varying speed induction motor, a research was made to examine a characteristic of this drawing machine and the action of this motor during operations in the drawing machine. In the next place, to analyze the phenomenon of the abrasion of drawing die, the relation between the abrasion of drawing die and the tension of wire was measured during wire drawing. Further, the influence of change in back tension during drawing on the abrasion of drawing die was examined by a drawing test using a tension testing machine. The results obtained were as follows:
1) The action of 3-phase varying speed induction motor keeps the wire free from slipping on the drawing capstans, enabling high speed drawing.
2) So long as the die load is kept constant during drawing, the abrasion of drawing die is comparatively little, but it is apt to take place when the die load is changed.