Metal deforming – By use of roller or roller-like tool-element – With carrier for roller-couple or tool-couple
Patent
1996-03-29
1998-01-13
Larson, Lowell A.
Metal deforming
By use of roller or roller-like tool-element
With carrier for roller-couple or tool-couple
72245, 72247, 72239, 72 201, B21B 3100
Patent
active
057066914
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a supporting method and equipment with which a position control of a cluster roll can be easily achieved; said cluster portion is composed of a plurality of side rolls being sequentially placed at a roll former. The present invention furthermore relates to a position measuring method and equipment for a platform of the cluster roll. More particularly, this invention relates to a supporting method for the roll former stands with which the distance between each roll along a moving direction of roll-formed pipes can be minimized by such means that a platform on which a roll bracket is deposited is commonly utilized, a pair of said platform is supported by a jack or the like, and the jack length is controlled, so that the height and inclined angle of said platform can arbitrarily be changed. Moreover, this invention directly relates to a position measuring method for the platform and an equipment thereof with which the length of plurality of jacks that is employed for the platform, is measured, and 6-axis coordinates of said platform are measured and controlled.
BACKGROUND OF THE INVENTION
According to a typical example for a pipe forming by employing a roll forming method, firstly a series of forming rolls is arranged and aligned; said forming roll should correspond to the final dimensions of the pipe diameter as well as the wall thickness, so that the flat strip steel as a starting material can be continuously roll-formed into pipes. This type of the roll-former is known as a continuous roll former. At the final stage of the above mentioned continuous roll-former, both side-edge portions of roll-formed pipes will be welded together to manufacture direct seam-welded pipe, which is sometimes referred to as electric-resistance welded pipes.
The generally operated piping process by the continuous roll-forming method is consisted of the following sequential processes; they include (1) initially roll-forming both side-edge portions of strip steel to form a semi-circular form with breakdown rolls, (2) forming said semi-circular workpieces into approximately circular shape by using non-powered side roll cluster and/or horizontal rolls, (3) an edge shape-adjustment, a dimension-adjustment, a surface-finishing and a centering are performed by utilizing the so-called fin-pass rolls, and (4) at the final stage, both side-edges are welded through squeeze rolls.
The present applicant has disclosed a forming method and equipment of the strip steel by using a pipe mill and forming rolls for manufacturing welded pipes by a continuous roll-forming method (Japan Patent Laid-Open Hei 3-12975, 3-12976, 3-12977, U.S. Pat. No. 4,770,019). According to said disclosures, the roll-forming of side-edge portions and central portion of the strip steel into semi-circular forms can be achieved, without exchanging forming rolls, by employing a single roll-forming operation which enables to roll-form pipes having a wide range diameters and wall thicknesses as well. Furthermore, the bend-forming of both side-edge portions can be securely achieved. Moreover, by roll-forming the central portion of the strip steel, any shortage of edge-bending can be compensated and adjusted, and any flash on side-edge portions can be avoided, so that pipes with a wide variety of sizes and good dimension stability can be produced.
According to the aforementioned forming method, since it was an object to expand a range for the common usage of the forming-roll, the roll surface is provided with a certain shape to accommodate to a selected pipe diameter by choosing the corresponding roll surface. Namely, the forming-roll is moved to reach a position at which a desired portion of the strip steel is needed to be roll-formed. Hence, the above disclosure employed a forming-roll stand which is structured in such a manner that the forming roll is designed to set independently and freely in any one of upper or lower (vertical) direction, left or right (horizontal) direction, or the contact (rotational) direction with r
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Mok James
Okamoto Atumu
Larson Lowell A.
Nakata Manufacturing Co., Ltd.
Tolan Ed
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