JPS558350A - Method and apparatus for pre-cast forging of pipe material - Google Patents

Method and apparatus for pre-cast forging of pipe material

Info

Publication number
JPS558350A
JPS558350A JP8086778A JP8086778A JPS558350A JP S558350 A JPS558350 A JP S558350A JP 8086778 A JP8086778 A JP 8086778A JP 8086778 A JP8086778 A JP 8086778A JP S558350 A JPS558350 A JP S558350A
Authority
JP
Japan
Prior art keywords
rolls
section
pair
stocks
pipe
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
JP8086778A
Other languages
Japanese (ja)
Inventor
Manabu Kiuchi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP8086778A priority Critical patent/JPS558350A/en
Publication of JPS558350A publication Critical patent/JPS558350A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To continuously and readily produce pipe materials by rolling a pair of long-length stocks to semi-circular form in section in a half-molten state, then opposing these so as to assume pipe form then reheating the mating faces thereby pressure welding the same.
CONSTITUTION: A pair of pipe material inside forming rolls 7, 8 having outside protruding parts 9, 9 of semicircular shape in section are disposed to a pair of pipe form outside forming rolls 1, 2 having semicircular grooves 3, 4 on the outside circumference. A high frequency reheater 14 is disposed in the position where the grooves 3, 4 of the rolls 1, 2 approach. Round bar stocks having been heated to a half-molten state are fed into the grooves 3, 4 of the rolls 1, 2 and are rolled to semicircular form in section by the rolls 1, 7 and 2, 8, thence the edge parts 17 having become longer than the semicircle of the stock section are cut away with a cutter 18, whereby the stocks of semicircule in section are provided. Next, the mating faces of a pair of the abovementioned stocks being fed are heated with the reheater 14, after which they are pressure welded by the rolls 1, 2 to pipe form.
COPYRIGHT: (C)1980,JPO&Japio
JP8086778A 1978-07-05 1978-07-05 Method and apparatus for pre-cast forging of pipe material Pending JPS558350A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8086778A JPS558350A (en) 1978-07-05 1978-07-05 Method and apparatus for pre-cast forging of pipe material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8086778A JPS558350A (en) 1978-07-05 1978-07-05 Method and apparatus for pre-cast forging of pipe material

Publications (1)

Publication Number Publication Date
JPS558350A true JPS558350A (en) 1980-01-21

Family

ID=13730285

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8086778A Pending JPS558350A (en) 1978-07-05 1978-07-05 Method and apparatus for pre-cast forging of pipe material

Country Status (1)

Country Link
JP (1) JPS558350A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6037220A (en) * 1983-08-11 1985-02-26 Nippon Steel Corp Manufacture of metallic pipe having wall-thickness difference in its longitudinal direction
JPS60152319A (en) * 1984-01-18 1985-08-10 Nippon Steel Corp Manufacture of metallic pipe having thickness difference in longitudinal direction of pipe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4940206A (en) * 1972-08-26 1974-04-15
JPS5258016A (en) * 1975-11-10 1977-05-13 Noboru Hidaka Spalling agent for slag ladle
JPS5370993A (en) * 1976-12-06 1978-06-23 Nippon Steel Corp Pouring method for hot molten slag into pan

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4940206A (en) * 1972-08-26 1974-04-15
JPS5258016A (en) * 1975-11-10 1977-05-13 Noboru Hidaka Spalling agent for slag ladle
JPS5370993A (en) * 1976-12-06 1978-06-23 Nippon Steel Corp Pouring method for hot molten slag into pan

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6037220A (en) * 1983-08-11 1985-02-26 Nippon Steel Corp Manufacture of metallic pipe having wall-thickness difference in its longitudinal direction
JPS60152319A (en) * 1984-01-18 1985-08-10 Nippon Steel Corp Manufacture of metallic pipe having thickness difference in longitudinal direction of pipe

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