Forming device and forming method

Patent metadata

Field	Value
Publication number	US-10773292-B2
Application number	US-201815890986-A
Country	US
Kind code	B2
Filing date	Feb 7, 2018
Priority date	Aug 27, 2015
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

A forming device includes: a first cavity portion in which a pipe portion is formed and a second cavity portion in which a flange portion is formed, the first cavity portion and the second cavity portion being formed between a first die and a second die; a flange adjusting member which is capable of being advanced into the second cavity portion and is capable of being retreated from the second cavity portion, and which adjusts a length of the flange portion; and a control unit. The control unit sequentially performs a first control of allowing the flange adjusting member to be advanced into the second cavity portion, a second control of allowing the gas supply unit to supply a gas so as to temporarily form the flange portion, and a third control of allowing the flange adjusting member to be retreated from the second cavity portion.

First claim

What is claimed is:

1. A forming device that forms a metal pipe including a pipe portion and a flange portion formed by compressing a part of the pipe portion, the forming device comprising:
a gas supply unit that supplies a gas into a heated metal pipe material that is retained between a pair of first die and second die;
a drive mechanism that moves at least one of the first die and the second die in a direction in which the dies are joined together;
a first cavity portion in which the pipe portion is formed and a second cavity portion which communicates with the first cavity portion and in which the flange portion is formed, the first cavity portion and the second cavity portion being formed between the first die and the second die;
a flange adjusting member which is capable of being advanced into the second cavity portion and is capable of being retreated from the second cavity portion, and which adjusts a length of the flange portion in an intersecting direction that is a direction intersecting an axial direction of the pipe portion; and
a control unit that controls gas supply of the gas supply unit, driving of the drive mechanism, and advancing and retreating of the flange adjusting member,
wherein the control unit sequentially performs, during forming of the metal pipe,
a first control of causing the flange adjusting member to be advanced into the second cavity portion,
a second control of causing the gas supply unit to supply the gas so as to temporarily form the flange portion of which a length is adjusted by the flange adjusting member, and
a third control of causing the flange adjusting member to be retreated from the second cavity portion such that the flange adjusting member does not come into contact with the flange portion.

2. The forming device according to claim 1 ,
wherein the flange adjusting member is advanced and retreated in the intersecting direction.

3. The forming device according to claim 2 , further comprising:
a suppressing member that abuts on the flange adjustment member during the second control by the control unit to hinder movement of the flange adjusting member in the intersecting direction.

4. The forming device according to claim 1 ,
wherein the flange adjusting member is provided in a manner capable of being accommodated in at least one of the first die and the second die, and is advanced and retreated in the direction in which the dies are joined together.

5. The forming device according to claim 4 ,
wherein the first die is an upper die, and the second die is a lower die including a concave portion,
the flange adjusting member, which is provided in a manner capable of being accommodated in the lower die, includes a base and a tip end on an upper die side in comparison to the base,
a width of the tip end in the intersecting direction is greater than a width of the base in the intersecting direction, and
the tip end is accommodated in the concave portion when the flange adjusting member is retreated.

6. A forming method of the metal pipe by using the forming device according to claim 1 , the forming method comprising:
moving at least one of the first die and the second die in the direction in which the dies are joined together to form the first cavity portion and the second cavity portion between the first die and the second die;
advancing the flange adjusting member into the second cavity portion;
temporarily forming the pipe portion in the first cavity portion, and temporarily forming the flange portion of which a length is adjusted in the second cavity portion by supplying the gas into the metal pipe material that is located in the first cavity portion;
retreating the flange adjusting member from the second cavity portion such that the flange adjusting member does not come into contact with the flange portion; and
performing main forming of the pipe portion and the flange portion, which are temporarily formed, by moving at least one of the first die and the second die in a direction in which the dies are joined together.

Assignees

• Sumitomo Heavy Industries

Inventors

• SAIKA Masayuki
• Ishizuka Masayuki
• UENO Norieda

Classifications

• B21D19/08

  by single or successive action of pressing tools, e.g. vice jaws · CPC title

• B21D26/039 Primary

  Means for controlling the clamping or opening of the moulds · CPC title

• B21D26/041

  Means for controlling fluid parameters, e.g. pressure or temperature · CPC title

• B21D26/045

  Closing or sealing means · CPC title