Holding and guiding a mandrel rod in rolled stock in and adjacent to a tube rolling mill

• US 4,638,655 A
• Filed: 11/30/1984
• Issued: 01/27/1987
• Est. Priority Date: 12/14/1983
• Status: Expired due to Fees

• Current Assignee: Mannesmann AG (Vodafone Group PLC)
• Original Assignee: Mannesmann AG (Vodafone Group PLC)
• Inventors: Sebastian, Wilhelm, Nickel, Wilhelm, Schirmag, Klaus-Peter
• Primary Examiner(s): Larson, Lowell A.
• Assistant Examiner(s): Katz, Steve
• Application Number:
  US06/676,664
• Time in Patent Office: 788 Days
• Field of Search: 72/208, 72/209, 72/250, 72/96, 72/97, 72/451, 82/39, 82/38 A, 82/38 R
• US Class Current: 72/208
• CPC Class Codes: B21B 25/02 Guides, supports, or abutments for mandrels, e.g. carriages or steadiers; Adjusting devices for mandrels
• CPC Class Codes: Y10T 82/2597 Center rest

Abstract

A mandrel rod with or without rolled tubes thereon is held by four guide structures, two arranged above and two below with respect to the axis of rolling, and each being arranged on a lever, these levers are arranged in pairs to both sides of the rolling axis, and they are particularly interconnected and connected to a common drive to permit common radial retraction of the guide structure; these guide structures have basically three different positions, one of full retraction permitting a mandrel rod with rolled tubes thereon to be removed by lifting while simultaneously a fresh mandrel rod is placed into the rolling axis from below; in a second position of the guide structures they engage a mandrel rod in the rolling axis, and in the third position they form-fittingly engage a hollow on the mandrel rod in the rolling axis.

Claims

1. Device for holding a mandrel rod adjacent to a mill for rolling and for guiding the rolled stock, there being a rolling axis and a delivery path for fresh mandrel rods being arranged in vertical alignment, comprising:

a basically U-shaped frame structure arranged on three sides of the rolling axis as well as of the mandrel rod delivery path, said frame structure being open on the fourth side to permit removal of a mandrel rod with rolled hollow thereon in the direction opposite the disposition of the mandrel rod delivery axis;

a first pair of levers arranged and mounted on the frame structure to one side of the rolling axis and respectively having guide elements, one of the guide elements being disposed above the rolling axis the other guide element being disposed below the rolling axis;

a second pair of levers arranged and mounted on the frame structure to another side of the rolling axis each likewise having a guide element, one of guide elements of the second pair of levers being disposed above the rolling axis and the other one of the guide elements of the second pair of levers being disposed below the rolling axis;

a pair of U-shaped connecting elements interconnecting levers pertaining to different ones of said pairs such that a lever of one of the pairs having a guide element disposed above the rolling axis is connected to a lever of the other pair having a guide element disposed below the rolling axis; and

a common drive means connected to one of the pairs for moving all said levers in unison in between different positions in which the respective guide elements have different radial distances from said axis of rolling.

2. Device as in claim 1 and including adjustable stop means for engagement with and disengagement from stops on said connecting means for establishing at least one of said particular positions of said guide means so that said guide means is adjustable for engagement with tubes of different diameter, said drive means tending to increase the distance of the guide elements from the roll axis, said adjustable stop means when engaging said stops on said connecting means preventing further increase of said distance.