Metal deforming – By use of tool acting during relative rotation between tool... – Tool orbiting or rotating about an axis
Patent
1997-11-07
2000-04-11
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
Tool orbiting or rotating about an axis
72125, 72318, B21D 1900
Patent
active
060475846
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to metallic pipe head forming and finishing operations, and concerns a multipurpose head forming and finishing apparatus.
BACKGROUND ART
Currently, many so-called head forming and finishing apparatuses are known that carry out flaring, widening, narrowing and other similar head forming and finishing or modifying operations on the heads of pipes.
These head forming and finishing apparatuses basically include a clamp for grabbing the pipe near the head thereof to be worked, and means for driving of a punch tool, mobile in a direction axial to the pipe held by the clamp.
The clamp includes a stationary jaw, supported by the apparatus base, and a mobile jaw moved vertically in such a manner as to be closed on the stationary jaw; the mobile jaw is fastened to a cross-piece displaced, via a couple of lateral vertical connecting rods, by an oil-pressure operated cylinder situated under the working surface.
The traditional head forming and finishing apparatuses have a very bulky structure and are little functional, particularly as the resistance to the stresses is concerned.
In fact, these apparatuses are equipped with very big motors, have long working cycles, with a remarkable energy consumption, and their tool set-up time is long, as well.
Document U.S. Pat. No. 3,411,338 discloses a tube flaring apparatus comprising a support flame and a clamp, operated in a horizontal direction suitable for gripping a pipe in proximity of a head to be worked. The clamp comprises a stationary jaw and a mobile jaw, suitable for operating a tool along a direction axial with respect to the pipe.
The above apparatus suffers for some drawbacks: the support frame is made of several members, which are fixed together by screws, and which have to be made by separate castings; one more tool supporting member is fixed separately from the support frame, and has to be precisely setup. Moreover, the tube head is gripped by the clamp jaws by means of a two-component female die, which is screwed to said jaws. Finally, the tool area and the clamp jaws area not easily accessible and visually controllable by an operator. This makes the apparatus settings quite long and complex.
DISCLOSURE OF THE INVENTION
The object of the present invention is to propose a multipurpose head forming and finishing apparatus, that is capable of performing an elevated number of operations, has small dimensions, features high resistance to stresses and is very functional.
The above mentioned object is achieved, in accordance with the claims, by means of a multipurpose head forming and finishing apparatus, that includes: pair of arms symmetrical with respect to a median vertical plane; proximity of a head to be worked, and including a stationary jaw and a mobile jaw, connected respectively to said arms of the support frame and aimed at being closed on said plane of median symmetry; pipe gripped by said clamp.
BRIEF DESCRIPTION OF THE DRAWINGS
The characteristics of the invention will be better understood from the following description, with particular reference to the attached drawings, in which:
FIG. 1 shows a schematic plan view of the subject head forming and finishing apparatus;
FIG. 2 shows a corresponding front view of the apparatus;
FIG. 3 shows a detailed plan view of the operation zone of the apparatus;
FIG. 4 shows a corresponding sectional view of the apparatus taken along a vertical transversal plane;
FIGS. 5 and 6 show plan views of the apparatus equipped with particular head forming and finishing tools, with some parts cross-sectioned;
FIGS. 7 and 8 show respectively a side and front view of a support carriage of the subject apparatus;
FIGS. 9 and 10 show corresponding views of a stationary frame of the apparatus support;
FIGS. 11, 12 and 13 show respectively a side, front and plan view of a different embodiment of the support carriage of the apparatus;
FIGS. 14, 15, 16 and 17 plan views of the apparatus equipped with other particular head forming and finishing tools, with some parts cross-sectioned
REFERENCES:
patent: 2124743 (1938-07-01), McMahon
patent: 2241091 (1941-05-01), Hood
patent: 2426723 (1947-09-01), Barrett
patent: 3041899 (1962-07-01), Benninghoff
patent: 3411338 (1968-11-01), Carlin
patent: 3610016 (1971-10-01), Bultman
patent: 4526023 (1985-07-01), Babb
patent: 5104031 (1992-04-01), Wolfe
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