Cross-rolling unit and method for adjusting a roll gap

Patent metadata

Field	Value
Publication number	US-12186790-B2
Application number	US-202318242618-A
Country	US
Kind code	B2
Filing date	Sep 6, 2023
Priority date	Aug 10, 2021
Publication date	Jan 7, 2025
Grant date	Jan 7, 2025

Abstract

In order to provide an adjustment of the roll gap under load with high positioning accuracy and regulation accuracy, a cross-rolling unit for adjusting rolls operating under load with, disposed on a force-absorbing roll stand, a mechanical setting unit for a first cross-roll setting and a hydraulic setting unit for a second cross-roll setting, wherein the mechanical setting unit includes two mutually displaceable mechanical subassemblies having a common axis of symmetry and the hydraulic setting unit includes at least two mutually displaceable hydraulic subassemblies having respectively one central axis, has the mechanical setting unit and the hydraulic setting unit disposed in the force-absorbing roll stand as a common subassembly. The axis of symmetry of at least one of the mutually displaceable mechanical subassemblies and the central axes of each of the mutually displaceable hydraulic subassemblies are the same.

First claim

What is claimed is:

1. An adjustment method for adjustment of a roll gap of rolls of a cross-rolling unit operating under load comprising a force-absorbing roll stand and a subassembly disposed on the force-absorbing roll stand comprising a mechanical setting unit and a hydraulic setting unit, wherein the rolls have roll axes inclined toward one another or relative to a rolling axis to impart both a longitudinal movement and a rotary movement to a workpiece, the method comprising:
(a) adjusting the roll gap by the mechanical setting unit and the hydraulic setting unit; and
(b) (i) transferring a rolling force acting on the rolls from at least one of the rolls firstly to the hydraulic setting unit, then transferring the rolling force by the hydraulic setting unit to the mechanical setting unit, and thereafter transferring the rolling force by the mechanical setting unit to the roll stand; or
(ii) transferring a rolling force acting on the rolls from at least one of the rolls firstly to the mechanical setting unit, then transferring the rolling force by the mechanical setting unit to the hydraulic setting unit, and thereafter transferring the rolling force by the hydraulic setting unit to the roll stand.

2. The adjustment method according to claim 1 , wherein the mechanical setting unit sets the roll gap in a load-free condition and/or the hydraulic setting unit adjusts the roll gap under load.

3. The adjustment method according to claim 1 , wherein the mechanical setting unit adjusts the roll gap under load.

4. The adjustment method according to claim 1 , further comprising at least one of a rotary drive and an electric drive configured to turn a gear part.

5. The adjustment method according to claim 4 , wherein the rotary drive or the electric drive drives or turns the gear part from outside the roll stand.

6. The adjustment method according to claim 4 , further comprising measuring a position of the gear part.

7. The adjustment method according to claim 6 , wherein the gear part is a spindle of the mechanical setting unit and the position of the spindle is measured under load.

8. The adjustment method according to claim 4 , wherein at least one of the piston and the cylinder surrounds the gear part.

9. The adjustment method according to claim 4 , wherein the rotary drive or the electric drive or the gear part is decoupled with respect to forces directed from one of the rolls toward the roll stand.

10. The adjustment method according to claim 9 , wherein the rotary drive is a worm gear.

11. The adjustment method according to claim 1 , wherein the hydraulic setting unit adjusts the roll gap using a piston and a cylinder.

12. The adjustment method according to claim 11 , wherein, during adjustment of the roll gap, at least one of the piston and the cylinder travel coaxially relative to a spindle of the mechanical setting unit.

13. The adjustment method according to claim 1 , further comprising measuring a position of the roll gap under load.

14. The adjustment method according to claim 1 , wherein the rolling force acting on the rolls is transferred firstly from at least one of the rolls to the hydraulic setting unit, then the rolling force is transferred by the hydraulic setting unit to the mechanical setting unit, and thereafter the rolling force is transferred by the mechanical setting unit to the roll stand.

15. An adjustment method for adjustment of a roll gap of rolls of a cross-rolling unit operating under load comprising a force-absorbing roll stand and a subassembly disposed on the force-absorbing roll stand comprising a mechanical setting unit for a first cross-roll setting and a hydraulic setting unit for a second cross-roll setting, wherein the mechanical setting unit comprises mutually displaceable first and second mechanical subassemblies having a common axis of symmetry, wherein the first mechanical subassembly is a spindle, wherein the hydraulic setting unit comprises mutually displaceable first and second hydraulic subassemblies having a first central axis and a second central axis, respectively, wherein the axis of symmetry and the first and second central axes are identical, and wherein the spindle is joined via a spindle thread directly with a piston of the second hydraulic subassembly, the method comprising:
(a) adjusting the roll gap by the mechanical setting unit and the hydraulic setting unit; and
(b) (i) transferring a rolling force acting on the rolls from at least one of the rolls firstly to the hydraulic setting unit, then transferring the rolling force by the hydraulic setting unit to the mechanical setting unit, and thereafter transferring the rolling force by the mechanical setting unit to the roll stand; or
(ii) transferring a rolling force acting on the rolls from at least one of the rolls firstly to the mechanical setting unit, then transferring the rolling force by the mechanical setting unit to the hydraulic setting unit, and thereafter transferring the rolling force by the hydraulic setting unit to the roll stand.

Assignees

• Sms Group Gmbh

Inventors

• Kirchner Walter

Classifications

• B21B13/10

  all axes being arranged in one plane · CPC title

• B21B1/16

  for rolling {wire rods, bars, merchant bars, rounds} wire or material of like small cross-section · CPC title

• B21B31/32

  by liquid pressure {, e.g. hydromechanical adjusting} · CPC title

• B21B31/22

  mechanically {, e.g. by thrust blocks, inserts for removal} · CPC title

• B21B13/008

  Skew rolling stands, e.g. for rolling rounds · CPC title