JPS58166925U

JPS58166925U - Pipe inner surface forming equipment

Info

Publication number: JPS58166925U
Application number: JP6338782U
Authority: JP
Inventors: 安田　務
Original assignee: 株式会社昭和製作所
Priority date: 1982-04-30
Filing date: 1982-04-30
Publication date: 1983-11-07

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図はこの考案の一実施態様を示す縦断正面図、第２
図は第１図■−■線上の縦断側面図、第３図は凹溝成形
後のパイプの断面形状を示す縦断側面図である。１・・・固定ホルダー、１−１・・・パイプ支持筒、１
−２・・・成形用ボール、１−３・・・中間固定金具、
１−４・・・外筒、１−５・・・ばね、１−６・・・パ
イプ受金具、１−７・・・穴、２・・・可動ホルダー、
３・・・段付き芯金、３　１・・・ストレート部、３−
２・・・テーパ一部、４・・・被成形パイプ、４−１・
・・凹溝。Fig. 1 is a longitudinal sectional front view showing one embodiment of this invention;
The figures are a vertical side view taken along the line ■--■ in FIG. 1, and FIG. 3 is a vertical side view showing the cross-sectional shape of the pipe after forming the groove. 1...Fixed holder, 1-1...Pipe support cylinder, 1
-2...Ball for molding, 1-3...Intermediate fixing metal fittings,
1-4... Outer cylinder, 1-5... Spring, 1-6... Pipe holder, 1-7... Hole, 2... Movable holder,
3...Stepped core metal, 3 1...Straight part, 3-
2... Part of the taper, 4... Pipe to be formed, 4-1.
・Concave groove.

Claims

[Scope of utility model registration request]

A molded pipe support cylinder having one or more molding balls or molding q-ra having a diameter larger than the wall thickness of the pipe on the same circumference of the pipe that can be inserted into the molded pipe; A fixed holder consisting of a molded pipe holder that is slidably fitted onto the base side of the support tube and always pressed against the tip side of the support tube by a spring, and a fixed holder that faces oppositely to the fixed holder on the same axis. A stepped core metal having a straight part with a diameter smaller than the inner diameter of the pipe support cylinder and a tapered part at the distal end thereof, and a movable holder that presses the pipe to be formed in the axial direction, and is provided in the pipe support cylinder to be formed. The pipe to be formed expands by pushing up a ball or roller with a tapered part of the stepped core metal, and the pipe to be formed is pressed by the movable holder against the pressure spring of the pipe holder, thereby expanding the pipe to be formed. A pipe inner surface forming device with a mechanism that forms concave grooves on the inner surface.