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JPS6478644A - Extrusion forming device for stepped blank - Google Patents

Extrusion forming device for stepped blank

Info

Publication number
JPS6478644A
JPS6478644A JP23679087A JP23679087A JPS6478644A JP S6478644 A JPS6478644 A JP S6478644A JP 23679087 A JP23679087 A JP 23679087A JP 23679087 A JP23679087 A JP 23679087A JP S6478644 A JPS6478644 A JP S6478644A
Authority
JP
Japan
Prior art keywords
blank
die
stepped
inner peripheral
stepped blank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP23679087A
Other languages
Japanese (ja)
Inventor
Masami Obara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP23679087A priority Critical patent/JPS6478644A/en
Publication of JPS6478644A publication Critical patent/JPS6478644A/en
Pending legal-status Critical Current

Links

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  • Forging (AREA)

Abstract

PURPOSE:To enable a forming without generating a gap between a blank and die by providing a hollow on the large diameter inner peripheral wall of the extrusion forming die coming into contact with the large diameter side face of a stepped blank and filling up a blank metal in this hollow. CONSTITUTION:After inserting a stepped blank 1 into the die 2 of an extrusion forming die, a compression load is exerted on the stepped blank 1. The lower end face 110 of the small diameter part 10b of the stepped blank 1 is abutted to a mandrel 4 and the blank metal of the large diameter side face la of the stepped blank 1 is filled up in the hollow 3 provided on the large diameter inner peripheral wall 2a of the die 2. The small diameter part 10b of the stepped blank 1 is subjected to hole working between the small diameter inner peripheral wall 26 of the die 2 and mandrel 4 and an extrusion part 13 is formed. The friction of the small diameter inner peripheral well 2b of the die 2 and the outer peripheral part of the extrusion part 13 can be made zero and the extrusion part 13 of the stepped blank 1 can thus obtain the external shape having no dissimilar projection.
JP23679087A 1987-09-21 1987-09-21 Extrusion forming device for stepped blank Pending JPS6478644A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23679087A JPS6478644A (en) 1987-09-21 1987-09-21 Extrusion forming device for stepped blank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23679087A JPS6478644A (en) 1987-09-21 1987-09-21 Extrusion forming device for stepped blank

Publications (1)

Publication Number Publication Date
JPS6478644A true JPS6478644A (en) 1989-03-24

Family

ID=17005833

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23679087A Pending JPS6478644A (en) 1987-09-21 1987-09-21 Extrusion forming device for stepped blank

Country Status (1)

Country Link
JP (1) JPS6478644A (en)

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