JPS63145523U

JPS63145523U -

Info

Publication number: JPS63145523U
Application number: JP3308787U
Authority: JP
Priority date: 1987-03-09
Filing date: 1987-03-09
Publication date: 1988-09-26

Description

[Brief explanation of the drawing]

第１図はこの考案に係わるパイプの液圧バルジ
成形装置の一実施例の構成を概略的に示す正面断
面図、第２図は上型のクランプ部がパイプの両端
部をクランプした状態を示す正面断面図、第３図
はクランプ後においてパイプをプレスすると共に
、スライダカム部材によりパイプの一端部を閉塞
した状態を示す正面断面図、そして、第４図はパ
イプ内に液圧を作用した状態を示す正面断面図で
ある。図中、１０…パイプ、１２…成形装置、１４…
下型、１６…上型、１６ａ…本体部分、１６ｂ…
クランプ部、１８，２０…キヤビテイ、２０ａ…
主キヤビテイ、２０ｂ…副キヤビテイ、２４…液
圧機構のノズル、２４ａ…突起部、２４ｂ…シー
ルリング、２４ｃ…連通孔、２６…スライダカム
部材、２６ａ…カム本体、２６ｂ…突起部、２６
ｃ…シールリング、２６ｄ…従動カム面、２８…
ドライバカム部材、２８ａ…駆動カム面、３０…
戻りばねである。 Fig. 1 is a front cross-sectional view schematically showing the structure of an embodiment of the pipe hydraulic bulge forming apparatus according to this invention, and Fig. 2 shows a state in which the clamp portion of the upper die clamps both ends of the pipe. 3 is a front sectional view showing a state in which the pipe is pressed after clamping and one end of the pipe is closed by a slider cam member, and FIG. 4 is a front sectional view showing a state in which hydraulic pressure is applied inside the pipe. FIG. In the figure, 10...pipe, 12...molding device, 14...
Lower mold, 16... Upper mold, 16a... Main body part, 16b...
Clamp part, 18, 20...Cavity, 20a...
Main cavity, 20b...Sub-cavity, 24...Nozzle of hydraulic mechanism, 24a...Protrusion, 24b...Seal ring, 24c...Communication hole, 26...Slider cam member, 26a...Cam body, 26b...Protrusion, 26
c... Seal ring, 26d... Followed cam surface, 28...
Driver cam member, 28a... Drive cam surface, 30...
It is a return spring.

Claims

[Claims for Utility Model Registration] (1) A pair of upper molds and lower molds arranged so as to be able to be joined to each other, and a pipe formed on the joining surfaces of these upper molds and lower molds to be bulge-formed. a cavity that defines the shape of the pipe after bulge forming by joining their joint surfaces; and a cavity that is attached to one of the upper and lower molds and that defines the inner periphery of the cavity of each of the upper and lower molds. a slider cam member provided so as to be slidable along an extending direction of one end of the pipe so as to seal one end of the pipe when both ends of the pipe are clamped by a surface; It is attached to the other of the lower molds, and when both ends of the pipe are clamped by the inner peripheral surfaces of the cavities of the upper mold and lower mold, the slider cam is engaged with the slider cam to seal one end of the pipe. A hydraulic bulge forming apparatus for a pipe, characterized in that it is equipped with a driver cam member that slides so as to (2) The utility model according to claim 1, wherein the slider cam member is slidably attached to the lower die, and the driver cam member is integrally attached to the upper die. Hydraulic bulge forming equipment for pipes. (3) The slider cam member includes a cam surface composed of an inclined surface, and the driver cam member engages with the inclined surface of the slider cam member in response to the downward movement of the driver cam member, thereby sealing the slider cam member against one end of the pipe. The hydraulic bulge forming apparatus for a pipe according to claim 2, characterized in that the apparatus is provided with a drive cam surface that slides in such a manner that the pipe is slidable. (4) The pipe hydraulic bulge forming apparatus according to claim 3, wherein the drive cam surface is formed of an inclined surface. (5) The hydraulic bulge forming apparatus for a pipe according to claim 1, wherein the slider cam member is biased in a direction away from one end of the pipe. .