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Tube-rolling machine core rod hydraulic restraint device

A mandrel, hydraulic technology, applied in metal rolling, metal rolling, metal processing equipment and other directions, can solve the problems of complex equipment processing, large motor power, large floor space, etc., to achieve low processing cost and low cost , the effect of small footprint

Inactive Publication Date: 2008-07-09
TAIYUAN HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional mandrel limit rolling is realized by using the motor to drive the mandrel trolley. Its disadvantages are the large power of the motor, high energy consumption, complex equipment processing, and large floor space. uneconomical

Method used

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  • Tube-rolling machine core rod hydraulic restraint device
  • Tube-rolling machine core rod hydraulic restraint device
  • Tube-rolling machine core rod hydraulic restraint device

Examples

Experimental program
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Embodiment Construction

[0017] As shown in Figures 1, 2, 3, 4, 5, and 6, a hydraulic stop device for pipe rolling mandrels consists of a mandrel trolley 1, a sliding seat 2, a rack and pinion mechanism 3, an idler device 4, a hydraulic reverse Push-type stopper 5, transmission device 6 are formed. In order to meet the requirement of the mandrel 7 cycle, there is a jaw 8 that can quickly open and clamp the mandrel at the front end of the mandrel trolley 1, and is controlled by a hydraulic cylinder 9. The mandrel will be pre-rotated before rolling, and the pre-rotation of the mandrel is to adopt the frequency conversion speed-regulating motor 10 provided with an overrunning clutch 11, and the rotating shaft of the mandrel trolley 1 driven by a belt drives the mandrel 7 to pre-rotate. At the beginning of rolling, when the rotation speed of the pipe and the mandrel exceeds the pre-rotation speed, the mandrel is disengaged and the mandrel is passively rotated. Roller 12 and slide plate 13 are housed on t...

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PUM

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Abstract

A hydraulic limiter for the mandrel of a pipe mill relates to the hot rolling pipe mill of seamless steel pipe. The traditional retaining rolling of mandrel adopts a mandrel carriage driven by a motor, which has the disadvantage of high motor power, high energy consumption, complicated equipment processing and large occupied area. The invention provides the front end of the mandrel carriage with a jaw used for holding the mandrel. The jaw is controlled by a hydraulic cylinder. The middle part of the mandrel carriage is provided with a pre-whirling device for the mandrel. The tail of the mandrel carriage is connected with the rack of a pinion and rack mechanism. Both sides of the rack are respectively provided with a hydraulic retro-limiter consisting of two retro-hydraulic cylinders, the head of hydraulic cylinder, a seat, a hopper chute and a support saddle. The invention adopts a motor-drive pinion and rack that drives the mandrel carriage move forward and backward. In rolling process, the retro-mandrel carriage of the hydraulic cylinder is adopted to control the speed of the mandrel and the limited motion of rolling of the mandrel is achieved. So the invention has the advantages of simple control structure, low motor power and low energy consumption.

Description

technical field [0001] The invention relates to a hot rolling mill for seamless steel pipes, in particular to a mandrel hydraulic stop device for the rolling mill. Background technique [0002] The pipe rolling machine is an important equipment in the production of seamless steel pipes. Its function is to thin the pipe wall of the perforated hollow capillary pipe and control the wall thickness of the inner and outer diameters. Taking the three-roll Assel pipe rolling machine as an example, the pipe rolling process is: the clamp of the mandrel trolley clamps the capillary tube after pre-piercing the mandrel, and feeds it into the pipe rolling machine, and the roll rotates to make the capillary tube pierced on the mandrel Rolling, stretching. The movement modes of the mandrel in the pipe include full floating, half floating and limit stop. Mandrel limit rolling is to control the mandrel during the rolling process, so that the mandrel runs at a set constant speed lower than t...

Claims

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Application Information

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IPC IPC(8): B21B25/02B21B25/00
Inventor 张淑芳
Owner TAIYUAN HEAVY IND