GB338144A - A method of and apparatus for reducing the cross-sectional area of bars - Google Patents

A method of and apparatus for reducing the cross-sectional area of bars

Info

Publication number
GB338144A
GB338144A GB14377/29A GB1437729A GB338144A GB 338144 A GB338144 A GB 338144A GB 14377/29 A GB14377/29 A GB 14377/29A GB 1437729 A GB1437729 A GB 1437729A GB 338144 A GB338144 A GB 338144A
Authority
GB
United Kingdom
Prior art keywords
work
tubes
rolls
roll
mandrel
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.)
Expired
Application number
GB14377/29A
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.)
PIPE AND TUBE BENDING CORP OF
Original Assignee
PIPE AND TUBE BENDING CORP OF
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 PIPE AND TUBE BENDING CORP OF filed Critical PIPE AND TUBE BENDING CORP OF
Publication of GB338144A publication Critical patent/GB338144A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/02—Special design or construction
    • B21J7/18—Forging machines working with die jaws, e.g. pivoted, movable laterally of the forging or pressing direction, e.g. for swaging

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

338,144. Pipe & Tube Bending Corporation of America, (Assignees of Neuberth, G. E.). Nov. 19, 1928, [Convention date]. Void [Published under Sect. 91 of the Acts]. Rolling tubes.-Tubes and bars are rolled in a tandem train of segmental oscillating rolls having housings, driving gear, roll adjustments, and mandrel and like supports and feeds as described in Specification 312,352. The roll pass is however constructed so that the several pairs of rolls act in succession at each stroke. The work is fed forward a step while the rolls are in the position shown in the Figure, the pass at a and d affording clearance. The portion ab reduces the work, the portion de permitting the axial movement due to the increase in length. A reducing portion ef comes into operation shortly before the point b is reached, and during this stage the portion be exerts a smoothing action only on the work which continues during further smoothing by the portion fg. Beyond the points c and g clearance exists. In the case of tubes the mandrel may be slightly tapered at the part lying between the roll pairs.
GB14377/29A 1928-11-19 1929-05-08 A method of and apparatus for reducing the cross-sectional area of bars Expired GB338144A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US338144XA 1928-11-19 1928-11-19

Publications (1)

Publication Number Publication Date
GB338144A true GB338144A (en) 1930-11-10

Family

ID=21872593

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14377/29A Expired GB338144A (en) 1928-11-19 1929-05-08 A method of and apparatus for reducing the cross-sectional area of bars

Country Status (4)

Country Link
BE (1) BE360514A (en)
FR (1) FR674771A (en)
GB (1) GB338144A (en)
NL (1) NL44546C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2528850C3 (en) * 1975-06-27 1979-09-20 Oskar Aleksandrovitsch Pljazkovskij Pilgrim step mill for pipe cold rolling

Also Published As

Publication number Publication date
NL44546C (en) 1938-12-15
FR674771A (en) 1930-02-01
BE360514A (en) 1929-06-29

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