JPS55144302A - Production of round bar - Google Patents

Production of round bar

Info

Publication number
JPS55144302A
JPS55144302A JP5363479A JP5363479A JPS55144302A JP S55144302 A JPS55144302 A JP S55144302A JP 5363479 A JP5363479 A JP 5363479A JP 5363479 A JP5363479 A JP 5363479A JP S55144302 A JPS55144302 A JP S55144302A
Authority
JP
Japan
Prior art keywords
calibers
radius
double
free surface
leader
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
JP5363479A
Other languages
Japanese (ja)
Inventor
Satoru Takeda
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.)
JFE Steel Corp
Original Assignee
Kawasaki Steel 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP5363479A priority Critical patent/JPS55144302A/en
Publication of JPS55144302A publication Critical patent/JPS55144302A/en
Pending legal-status Critical Current

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  • Metal Rolling (AREA)

Abstract

PURPOSE: To increase the roundness of the products by making the radius for securing the specified reduction of area out of two calibers 2.5W5.0 times the radius corresponding to the free surface of a finishing calibers in the case of producing round bars by using double calibers.
CONSTITUTION: Double radius calibers are used as leader oval caliber and over- round rolling is performed at a product size diameter about 20mm and finish reduction of area about 12%. The double radius calibers have two different radii, RK1 shown by formula I and RK2 shown by formula II. Since there are virtually no compressive strains in the front layer part of a free surface 5, the radius RK1 of the leader oval caliber shape 1' corresponding to the finish surface is made about 12.5mm. If the range B of RK1 is taken wider than free surface height Hf, the free surfaces are all formed by the variations of RK1. Here, RK2 is about 37mm, about 3 times RK1. In this way, the product nearly close to true circle is obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP5363479A 1979-05-01 1979-05-01 Production of round bar Pending JPS55144302A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5363479A JPS55144302A (en) 1979-05-01 1979-05-01 Production of round bar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5363479A JPS55144302A (en) 1979-05-01 1979-05-01 Production of round bar

Publications (1)

Publication Number Publication Date
JPS55144302A true JPS55144302A (en) 1980-11-11

Family

ID=12948327

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5363479A Pending JPS55144302A (en) 1979-05-01 1979-05-01 Production of round bar

Country Status (1)

Country Link
JP (1) JPS55144302A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010061653A (en) * 1999-12-28 2001-07-07 이구택 High carbon steel wire rolling mill with groove
CN104722575A (en) * 2015-04-03 2015-06-24 甘肃酒钢集团宏兴钢铁股份有限公司 Non-tangent expansion round steel hole type and production method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010061653A (en) * 1999-12-28 2001-07-07 이구택 High carbon steel wire rolling mill with groove
CN104722575A (en) * 2015-04-03 2015-06-24 甘肃酒钢集团宏兴钢铁股份有限公司 Non-tangent expansion round steel hole type and production method

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