US3751959A - Forging machine - Google Patents

Forging machine Download PDF

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Publication number
US3751959A
US3751959A US00163747A US3751959DA US3751959A US 3751959 A US3751959 A US 3751959A US 00163747 A US00163747 A US 00163747A US 3751959D A US3751959D A US 3751959DA US 3751959 A US3751959 A US 3751959A
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US
United States
Prior art keywords
roll
groove
bar
flanges
rolls
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 - Lifetime
Application number
US00163747A
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English (en)
Inventor
G Ory
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3751959A publication Critical patent/US3751959A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/10—Making helical bodies or bodies having parts of helical shape twist-drills; screw-taps

Definitions

  • the present invention relates to a forging machine and, more particularly, it relates to a rotary forging machine in which the profile to be forged is rolled through a groove formed between four flanges which roll, in pairs, on top of each other.
  • the rolls of a two-high mill undergo a certain degree of buckling or deflection (the rolls are provided with a certain number of grooves and the distance between journals can be on the order of one meter); this then does not lead to a high degree of cross-sectional precision of the rod as determined by the profile of the grooves.
  • the final cross-section is obtained through successive passes of the billet through the machine and the profile is gradually modified, when for example, a square billet is given a round section.
  • the transverse rigidity of the working rolls is assured by means of one or more back up rolls, such as for example in a Sendzimir cold rolling train.
  • FIG. 1 is an' isometric view of a forging machine constructed in accordance with features of this invention
  • FIG. 2 is a view of FIG. I taken along lines II-Il;
  • FIGS. 4 and 5 are cross-sections of the rod, before and after edging.
  • FIG. 6 is an enlarged view of a detail of FIG. 2.
  • FIG. 1 shows two rolls 1 and 2 mounted in bearings 5 provided in columns 3 and 4.
  • flanges 9 and 10 are located between journals 7 and 8 of roll 1. Flanges 9 and 10 are in contact with flanges 11 and 12, respectively, of roll 2.
  • the rolls are machined between the flanges so as to form profile 13, with proper constriction of the bar to be produced.
  • the cross-sectional area of rod 18 (for example rectangular) is 5 to 15 percent greater than that of blank 14 and its leading pass section is fed into the machine at 19 (FIGS. 2 and 6).
  • a rectilinear wedge 20 is appropriately secured to each column in order to prevent any part of bar 18 from laterally entering the roll gap 21 located ahead of the point of contact between flanges l0 and 12, adjacent on the same column.
  • the jumped metal changes, for example, from its rectangular shape 18 to the grooved shape of drill 14, or from round shape 22 having a diameter d to grooved profile 15 having a diameter D.
  • the gauging of the forged profile being produced is highly precise due to the fact that the flanges on either side of a roll must turn while being precisely positioned upon the flanges of the other roll.
  • the problem which arises is that of rectifying the rolls once the roots of the grooves have been worn down through repeated forging operations.
  • the dimensions are restored, partly by machining the roots of the grooves, partly by flangeupon-flange lathe turning of the bearings and readjustment of the dimensions of the curvilinear wedges. Since the diameter A of the flanges decreases each time the rolls are rectified, the invention provides for a column having two orthogonal bearing housings, a housing 23 having a horizontalentry axis H and a housing 24 having a vertical entry axis Z.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Metal Rolling (AREA)
US00163747A 1970-07-24 1971-07-19 Forging machine Expired - Lifetime US3751959A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7027515A FR2096999B1 (enExample) 1970-07-24 1970-07-24

Publications (1)

Publication Number Publication Date
US3751959A true US3751959A (en) 1973-08-14

Family

ID=9059251

Family Applications (1)

Application Number Title Priority Date Filing Date
US00163747A Expired - Lifetime US3751959A (en) 1970-07-24 1971-07-19 Forging machine

Country Status (3)

Country Link
US (1) US3751959A (enExample)
DE (1) DE2136975A1 (enExample)
FR (1) FR2096999B1 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4400963A (en) * 1981-12-09 1983-08-30 Amca International Limited Roller entry guide for angles

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2363883A (en) * 1942-07-11 1944-11-28 Mid West Forge Company Apparatus for die rolling billets
FR924280A (fr) * 1946-03-20 1947-07-31 Procédé et appareil permettant de fabriquer des forets hélicoïdaux

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4400963A (en) * 1981-12-09 1983-08-30 Amca International Limited Roller entry guide for angles

Also Published As

Publication number Publication date
DE2136975A1 (de) 1972-01-27
FR2096999A1 (enExample) 1972-03-03
FR2096999B1 (enExample) 1975-01-10

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