| 摘要 |
PURPOSE:To improve workablity and to perform a continuous manufacturing, by ironing a band-shaped blank material, etc. having the same cross-sectional shape by extrusion, and acquiring specified dimensions, and continuously cutting the material into a fixed length. CONSTITUTION:A band-shaped blank material 6a is inserted into a supplying hole 10 of a blank material inserting part 14 and is stopped at the drawing 3a part of a common die 3. Next, a movable die block 4 is moved horizontally, and the material 6a is sheared from a joining surface of a die 12 and the die 3, and then, the blank material remained in the die 3 is moved together with the die 3 to the position just below an extruder 7. Successively, the material 6a, supplied from a supplying hole 9, is passed through the inside of an upper shearing die 11 and is inserted into a common die 2, and then the extruder 7 moves a vertically movable part downwards. The bottom end of an outside punch 16 touches on the upper surface of the die 3, and an extrusion rod 17 descends to intrude an extrusion pin 5 into the die 3, and the pin 5 extrudes the material through the drawing 3a to perform the ironing and straightening of the material, and then a shank part 6 having a prescribed dimensional accuracy is manufactured. |
