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Circular rolling mill with forming rolls and method for controlling the position of the rolls of such a rolling mill

A technology for rolling mills and rolls, applied in the field of circular rolling mills, can solve the problems of complicated rolling mills and increased cost of rolling mills.

Active Publication Date: 2020-08-21
福格帕特股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mounting electric geared motors on articulated supports makes the mill more complex, which increases the cost of the mill and results in additional maintenance operations

Method used

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  • Circular rolling mill with forming rolls and method for controlling the position of the rolls of such a rolling mill
  • Circular rolling mill with forming rolls and method for controlling the position of the rolls of such a rolling mill
  • Circular rolling mill with forming rolls and method for controlling the position of the rolls of such a rolling mill

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Experimental program
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Effect test

Embodiment Construction

[0037] Figure 1 to Figure 10 The rolling mill 2 shown in includes a fixed main frame 4 defining a longitudinal axis X2 of the rolling mill 2 . Frame 2 supports a radial cage 6 fixedly mounted on said frame, and an axial cage 8 movable relative to frame 4 along axis X2.

[0038] The first auxiliary frame 46 is fixedly mounted on the main frame 4 and constitutes the armature of the radial cage 6 . The second auxiliary frame 48 is mounted on the main frame 4 while being movable relative thereto along the axis X2. The auxiliary frame 48 constitutes the armature of the axial cage 8 .

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PUM

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Abstract

The circular rolling mill (2) comprises: a fixed main frame (4); a pair of cylindrical rolls (62) on the inside and outside respectively, the cylindrical rolls are intended to is formed face-to-face and is supported by a first secondary frame (46) mounted on the main frame; and a pair of conical rolls (82, 84) at the upper and lower portions respectively, which are intended to shape the part ( The opposite front face of P) is shaped and supported by a second secondary frame (48) mounted on the main frame. At least one rack and pinion assembly (272-273, 274-275) is arranged to move the roll in translation relative to one of the secondary frames (44, 48). At least one electric geared motor (172, 176, 178) is arranged to drive a pinion (273, 275) of the rack and pinion assembly. An electric geared motor (172-178) is fixedly mounted relative to one of the auxiliary frames (46, 48). The fluid discharge mechanism (M72, M74) is inserted in a kinematic chain for transmitting forces between the racks (272, 274) and the rolls moving through the racks. The fluid discharge mechanism (M72, M74) includes at least one variable volume chamber (C72, C74) supplied with a pressurized fluid (73), and the volume of the at least one variable volume chamber depends on the roll and rack (272, 274 ) relative position changes.

Description

technical field [0001] The invention relates to a circular rolling mill comprising two pairs of rolls intended to shape the radial face and the front face of an annular part. Background technique [0002] In rolling mills of this type, it is known that the rolls have to be moved during the operation of the rolling mill in order to adapt the position of the rolls to the dimensions of the part being formed. Traditionally, hydraulic jacks are used to move the rolls. This requires having a large amount of pressurized oil, so that a relatively bulky hydraulic unit must be located near the rolling mill. [0003] In order to solve this problem, it is known from WO-A-2009 / 125102 to use a pinion rack assembly to move the rolls of a circular rolling mill, wherein the pinion is rotated by the output shaft of an electric geared motor. In order to limit the risk of breakage in the event of surface irregularities with which the rolls interact, the electric geared motor is provided mount...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21H1/06
CPCB21H1/06B21B13/10B21B31/32B21B37/52
Inventor 彼得·比尔哈尔特
Owner 福格帕特股份有限公司