JPS55106648A - Cross rolling working method and die for cross rolling working - Google Patents

Cross rolling working method and die for cross rolling working

Info

Publication number
JPS55106648A
JPS55106648A JP1372279A JP1372279A JPS55106648A JP S55106648 A JPS55106648 A JP S55106648A JP 1372279 A JP1372279 A JP 1372279A JP 1372279 A JP1372279 A JP 1372279A JP S55106648 A JPS55106648 A JP S55106648A
Authority
JP
Japan
Prior art keywords
shaft
cross rolling
rolling working
diameter
subsequent steps
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.)
Granted
Application number
JP1372279A
Other languages
Japanese (ja)
Other versions
JPS57134B2 (en
Inventor
Eihiko Tsukamoto
Nobutaka Maeda
Kazuo Morimoto
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP1372279A priority Critical patent/JPS55106648A/en
Publication of JPS55106648A publication Critical patent/JPS55106648A/en
Publication of JPS57134B2 publication Critical patent/JPS57134B2/ja
Granted legal-status Critical Current

Links

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  • Forging (AREA)

Abstract

PURPOSE: To prevent the bending of shaft part and the occurrence of Mannesmann hole and improve yield by making the ratio of blank diameter and the shaft diameter of the first step to the specific ratio and specifying the reduction ratio of the shaft after the second and subsequent steps.
CONSTITUTION: If the blank diameter is let d0 and the shaft diameter of the first step d1 in the cross rolling working method which builds up and roll works the stepped shaft form part, then the head parts are build-up worked simultaneously while it is formed down to d1=(0.5W0.5)d0. Thence, if the shaft diameter of the second and subsequent steps is let dm(the second step is d2, the third step is d3... and these are generalized to dm), then the shaft dm of the second and subsequent steps is formed always to reduction ratio 1-dm/d1≥0.15 (i.e., dm/ d1≤0.85). This makes the occurrence of Mannesmann hole difficult and improves the yield of material.
COPYRIGHT: (C)1980,JPO&Japio
JP1372279A 1979-02-08 1979-02-08 Cross rolling working method and die for cross rolling working Granted JPS55106648A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1372279A JPS55106648A (en) 1979-02-08 1979-02-08 Cross rolling working method and die for cross rolling working

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1372279A JPS55106648A (en) 1979-02-08 1979-02-08 Cross rolling working method and die for cross rolling working

Publications (2)

Publication Number Publication Date
JPS55106648A true JPS55106648A (en) 1980-08-15
JPS57134B2 JPS57134B2 (en) 1982-01-05

Family

ID=11841130

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1372279A Granted JPS55106648A (en) 1979-02-08 1979-02-08 Cross rolling working method and die for cross rolling working

Country Status (1)

Country Link
JP (1) JPS55106648A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020006434A (en) * 2018-06-28 2020-01-16 日本製鉄株式会社 Prediction method for occurrence of inner crack

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61109938U (en) * 1984-12-22 1986-07-11
JPH0492412U (en) * 1990-12-27 1992-08-12

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020006434A (en) * 2018-06-28 2020-01-16 日本製鉄株式会社 Prediction method for occurrence of inner crack

Also Published As

Publication number Publication date
JPS57134B2 (en) 1982-01-05

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