JPH0470233U

JPH0470233U -

Info

Publication number: JPH0470233U
Application number: JP11071890U
Authority: JP
Priority date: 1990-10-23
Filing date: 1990-10-23
Publication date: 1992-06-22

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す図で、第４図
のＢ−Ｂ線に沿う上型上昇時の断面図、第２図は
同じく上型下降時の断面図、第３図は同じく補助
ポンチの要部拡大斜視図、第４図Ａは同じく下型
の要部斜視図、第４図Ｂは同じく下型の平面説明
図、第５図は従来のプレス成形装置の一例を示す
上型上昇時の断面図、第６図はグリツパーとワー
クとの関係を示す平面説明図である。５……トランスフアバー、６……グリツパー、
１１……下型、１２……ポンチ、１３……ブラン
クホルダ、１４……ダイ（上型）、１７……切欠
部、１８……補助ポンチ、１９……ビード成形用
突起、２３……ビード部、Ｃ……コーナー部、Ｗ
……ワーク。 Fig. 1 is a cross-sectional view of an embodiment of the present invention taken along the line B-B in Fig. 4 when the upper mold is raised, Fig. 2 is a sectional view when the upper mold is lowered, and Fig. 3 is a sectional view when the upper mold is lowered. Similarly, FIG. 4A is an enlarged perspective view of the main part of the auxiliary punch, FIG. 4A is a perspective view of the main part of the lower die, FIG. 4B is a plan explanatory view of the lower die, and FIG. 5 is an example of a conventional press forming apparatus. FIG. 6 is a cross-sectional view when the upper die is raised, and is a plan view showing the relationship between the gripper and the workpiece. 5...Transfer bar, 6...Grizpur,
11...Lower die, 12...Punch, 13...Blank holder, 14...Die (upper die), 17...Notch, 18...Auxiliary punch, 19...Protrusion for bead forming, 23...Bead Section, C...Corner section, W
……work.

Claims

[Claims for Utility Model Registration] A lower mold consisting of a punch and a blank holder, and an upper mold are used to draw and form a workpiece into a predetermined shape, and then the formed workpiece is scooped up with a gripper attached to a transfer bar for the next process. In a transfer type press forming apparatus, a notch is formed in a part of the blank holder corresponding to the corner of the workpiece to allow a gripper to enter when transporting the workpiece, and a notch is formed in the part of the blank holder corresponding to the corner of the workpiece, and When the upper mold is at the bottom dead center position, the part corresponding to the upper mold enters the notch part and pressurizes and restrains the corner part of the workpiece between it and the upper mold while forming a bead part at the corner part. A transfer type press molding apparatus characterized in that an auxiliary punch is provided for retracting from the notch and releasing the restraint of the corner part when the upper die is raised.