JPH0385134U

JPH0385134U -

Info

Publication number: JPH0385134U
Application number: JP14469289U
Authority: JP
Priority date: 1989-12-15
Filing date: 1989-12-15
Publication date: 1991-08-28

Description

[Brief explanation of drawings]

第１図ないし第４図はこの考案の一実施例を示
すもので、第１図は鍛造機の要部を示す断面正面
図、第２図Ａ〜Ｄは鍛造の各工程を順に示すもの
で、第２図Ａはワークセツト工程を示す図、第２
図Ｂは上型の下降工程を示す図、第２図Ｃは上型
が下死点に達した状態の成形工程を示す図、第２
図Ｄはワークのノツクアウト工程を示す図、第３
図はノツクアウトピンのストローク長とピン径と
の関係を示すグラフ、第４図はノツクアウトピン
の面圧とピン径との関係を示すグラフ、第５図は
従来の鍛造機のノツクアウト機構を示す図である
。１０……鍛造機、１１……上型、１２……パン
チ、１３……ダイス、１４……エジエクタ、１５
……エアシリンダ、１６……ピストン、１７……
ノツクアウトピン、２１……ガイド部材、２１ａ
……第１ストツパ、２１ｂ……ガイド部、２１ｃ
……第２ストツパ、Ｗ_１……前形状ワーク、Ｗ…
…仕上げ形状ワーク。 Figures 1 to 4 show an embodiment of this invention. Figure 1 is a cross-sectional front view showing the main parts of a forging machine, and Figures 2 A to D show each forging process in order. , Figure 2A is a diagram showing the work setting process, Figure 2A is a diagram showing the work setting process;
Figure B is a diagram showing the lowering process of the upper mold, Figure 2 C is a diagram showing the molding process with the upper mold reaching the bottom dead center, and Figure 2
Figure D is a diagram showing the knock-out process of the workpiece, the third
The figure is a graph showing the relationship between the stroke length of the knockout pin and the pin diameter, Figure 4 is a graph showing the relationship between the contact pressure of the knockout pin and the pin diameter, and Figure 5 is a graph showing the knockout mechanism of a conventional forging machine. FIG. 10...Forging machine, 11...Upper die, 12...Punch, 13...Dice, 14...Ejector, 15
...Air cylinder, 16...Piston, 17...
Knockout pin, 21...Guide member, 21a
...First stopper, 21b...Guide part, 21c
...Second stopper, W ₁ ...Previous shape work, W...
...Finished shape work.

Claims

[Scope of utility model registration request]

In a knock-out mechanism in which a workpiece is ejected by a pin connected to a piston of a cylinder device provided on the movable mold side, a ring is airtightly installed between the piston and the inner surface of the cylinder in the cylinder device that drives the pin. , allows a certain amount of sliding of the inner piston, and has a first stopper that engages the front end of the piston at one end and a pin that engages the rear end of the piston and is connected to the piston at the other end. Each of the second stoppers has a guide portion that slides in relative movable contact with the outer periphery, and a guide member that slides integrally with the piston when the piston is engaged is accommodated in one of the two stoppers. Knock-out mechanism.