JPH0385145U

JPH0385145U -

Info

Publication number: JPH0385145U
Application number: JP14604689U
Authority: JP
Priority date: 1989-12-18
Filing date: 1989-12-18
Publication date: 1991-08-28

Description

[Brief explanation of the drawing]

第１図は本考案の実施例にかかるナツクル成形
装置の要部縦断面図、第２図〜第４図はその状態
変化図、第５図は第１図の−縦断面図、第６
図はワークの成形方法の説明図である。１……第１型、２……第２型、３……第１穴明
けパンチ、４……第２穴明けパンチ、１１……第
１ピース、１２……第２ピース、１５〜１７……
貫通孔、３１，４１……打ち抜き部、３２，４２
……テーパー部、５０……ワーク、５１……第１
アーム部、５２……第２アーム部。 FIG. 1 is a vertical cross-sectional view of essential parts of a knuckle forming apparatus according to an embodiment of the present invention, FIGS. 2 to 4 are state change diagrams, FIG. 5 is a vertical cross-sectional view of FIG.
The figure is an explanatory diagram of a method of forming a workpiece. 1...First die, 2...Second die, 3...First hole punch, 4...Second hole punch, 11...First piece, 12...Second piece, 15-17... …
Through hole, 31, 41...Punching part, 32, 42
... Taper part, 50 ... Workpiece, 51 ... 1st
Arm part, 52... second arm part.

Claims

[Scope of utility model registration request]

A knuckle, which has a pair of left and right arms branching into a substantially fork shape, with the ends of each arm facing each other in parallel, is obtained by forging a workpiece having a shape similar to the knuckle using a mold. In the knuckle forming apparatus, the forming molds include a first mold for molding the outer surface of each arm of the workpiece, and a second mold disposed inside the first mold for molding the inner surface of each arm. On the other hand, the first mold and the second mold are each formed with a through hole that can coaxially communicate with each other in the thickness direction of the arm end when the knuckle molding is almost completed, and In the through hole of the mold, there is a first hole punch that punches a hole in one arm end of the workpiece, and a second hole punch that punches a hole in one arm end of the workpiece.
A second hole punch for making a hole at the end of the other arm is arranged movably in the axial direction of the through hole of the mold, and the first hole punch and the second hole punch are arranged movably in the axial direction. A knuckle forming apparatus characterized in that the punch is configured such that a second hole punch is operated in conjunction with the application of pressure to the first hole punch.