RU2305015C2 - Working line of tube cold rolling mill - Google Patents

Abstract

FIELD: rolled tube production, namely modified working line of tube cold rolling mill.

SUBSTANCE: working line of tube cold rolling mill includes rolling stand with movable cartridge having rolling rolls with variable cross section grooved passes; stationary housing; drive unit for reciprocation motion of cartridge; front and intermediate chucks with spindles providing rotation of tube and blank in rolling line. Stationary housing includes foundation, lid and vertical struts joining foundation with lid. Vertical struts of stationary housing are mounted along rolling line. Spindles of front and intermediate chucks are mounted coaxially one to other and to grooved passes of rolling rolls in vertical struts of stationary housing.

EFFECT: lowered metal consumption of working line of tube cold rolling mill due to mounting of front and intermediate chucks in struts of rolling stand.

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Description

The invention relates to pipe rolling production and for improving the working line of the cold rolling mill.

Known working line of the cold rolling mill described in US patent No. 3488680, class. 72-214, 1970. The working line contains a working stand with a movable power bed with working rolls with calibers with variable cross-section of the brooks, a base plate with guides for the working stand, front and intermediate cartridges mounted on frames in front of and behind the working movement area crates.

A disadvantage of the known design is that the movable power bed of the working stand, perceiving the rolling forces, has a significant mass, therefore, when it is reciprocating, significant dynamic forces arise that impede the increase in the speed of the mill.

Of the known working lines of the cold rolling mill, the closest in technical essence is the working line of the cold rolling mill, described in US patent No. 3030835, CL. 80-14, 1962.

The known working line contains a working stand with a movable cassette with work rolls equipped with calibers with a variable cross-section of the streams, and a stationary power bed with a base, a lid and vertical posts connecting the base and the lid, a cartridge reciprocating drive, front and intermediate cartridges installed on additional frames, with spindles providing rotation of the pipe and workpiece on the rolling line.

A disadvantage of the known design is that additional frames are used to install the front and intermediate cartridges, which leads to an increase in the metal consumption of the mill and makes it difficult to ensure the alignment of the cartridges with each other and the grooves of calibers.

The objective of the invention is to reduce the metal consumption of the working line of the cold pipe rolling mill.

The task is achieved by the fact that in the working line of the cold pipe rolling mill containing the working stand with a movable cassette with work rolls equipped with calibers with a variable cross-section of streams and a stationary power bed with a base, a cover and vertical posts connecting the base and the cover, the drive translational movement of the cartridge, front and intermediate chucks with spindles, providing rotation of the pipe and the workpiece on the rolling line, according to the invention, vertical racks of stationary force the howling bed is installed along the rolling line, and the spindles of the front and intermediate cartridges coaxial with each other and with streams of calibers of the work rolls are mounted in vertical racks of a stationary power bed.

This design of the working line of the cold pipe rolling mill reduces the metal consumption of the working line of the cold pipe rolling mill by installing front and intermediate cartridges in the stands of the working stand.

To explain the invention, a specific embodiment of the invention is given below with reference to the accompanying drawing, which shows the working line of a cold rolling mill, a longitudinal section along the rolling line.

The working line of the cold pipe rolling mill consists of a working stand 1 containing a movable cartridge 2 and a stationary power frame 3, a drive 4 for moving the cartridge 2, a front cartridge 5 and an intermediate cartridge 6. The cartridge 2 contains work rolls 7 with gauges 8. Stationary power frame 3 contains a base 9, a cover 10 and vertical posts 11 and 12 mounted on a rolling line and connecting the base 9 and a cover 10. The front cartridge 5 and the intermediate cartridge 6 contain spindles 13 and 14, respectively, mounted in vertical columns ykah 11 and 12 coaxial with streams 8 caliber work rolls 7.

The device operates as follows.

During the operation of the mill, the cartridge 2 from the drive 4 moves reciprocally along the base 9 and the cover 10. During the rolling process, the spindles 13 and 14 of the front cartridge 5 and the intermediate cartridge 6 orient the pipe and the workpiece on the rolling axis and rotate them in accordance with the operation cycle camp.

Using for installation of cartridges 5 and 6 already existing elements of the working stand - stands 11 and 12 allows to reduce the metal consumption of the working line of the cold pipe rolling mill and thus reduce the cost of its manufacture.

Claims (1)

A working line of a cold rolling mill containing a working stand with a movable cassette with work rolls having calibers with a variable cross-section of streams, a stationary power bed with a base, a lid and vertical posts connecting the base and the lid, the cassette reciprocating drive, front and intermediate cartridges with spindles, providing rotation of the pipe and the workpiece on the rolling line, characterized in that the vertical posts of the stationary power bed are installed along the rolling line, and the coax s with each other and with streams caliber working rolls and the intermediate spindles front cartridges mounted in the uprights of the stationary frame power.