| 摘要 |
PURPOSE:To make easy the work for manufacturing the circular tube with the flat part crossing orthogonally with the axial line of the through hole for inserting to the circular tube by opening its lower end to the inner circumferential surface of the through hole for inserting the circular tube and providing the through hole for inserting the working tool so as to be able to insert the working tool to its axial line direction in freely moving. CONSTITUTION:The circular tube as stock is inserted in the through hole 27 for inserting the circular tube of the die 20, then the working tool 10 is inserted from the upper side into the penetrating hole 28 for inserting the working tool and the cover 21 is set. The number 30 for pressing down the working tool is inserted in the hole 26 for inserting the pressing member from the right side, the member 30 is moved to the left side. The working tool is pressed down with the wedge action of the sloped surface, the recessing elongated to the direction crossing at right angle with the axial line direction of the circular tube is formed with the working surface 11 of the working tool 10. In this state, the circular tube is moved forward with the punch 32. The flattened part 2 having the length corresponding to the moved distance of the circular tube is formed with the working surface 11 of the working tool 10 at the circumferential wall. In such a way, the circular tube 1 with the flattened part 2 is manufactured. |
