SU1329851A2 - Tube cold rolling mill - Google Patents

Abstract

The invention relates to pipe production, and, in particular, to cold rolling mills with a movable working stand, and is an improvement of the known mill described in the ed. St. No. 1091952. The aim of the invention is to provide the same supply of coolant to the deformation zone at the forward and backward strokes. The cold rolling mill includes a movable stand and an adjacent body 1 with 2 sliding supports and working rolls 3, stationary guides 5 for the sliding supports of the body, pipeline 6 connected to the coolant tank, and pipelines 7 and 8 s nozzles mounted on the cage housing symmetrically to each other relative to the axial roll plane. In one of the supports of the housing there is a longitudinal open groove 9 and a pair of vertical channels 10 and II, to which a pair of pipelines 7 and 8 are connected, respectively. A longitudinal channel 13 to which the pipeline 6 is connected and a pair of vertical channels 14 and 15 are connected to the guide out in the groove. The guide has a protrusion 12 that divides the groove into two chambers, with this, the left chamber communicates with the vertical channels 10 and 14, and the right - with the vertical channels and 11 and 15 channels, and in each vertical channel there is a reverse valve. 1 il. (L with th with 00 ate

Description

The invention relates to pipe production, namely to cold rolling mills for tubes with a movable working stand, and is an improvement of the known mill described in the ed. St. No. 1091952.

The purpose of the invention is to provide the same supply of coolant to the deformation center during the forward and oblique movements of the stand.

The drawing shows the proposed camp, a general view.

The mill contains a movable stand having a housing 1 with 2 sliding supports and a pair of work rolls 3, a base 4 with guides 5 for the supports of the stand casing, a pipeline 6 for supplying coolant, a pipeline 7 with nozzles for supplying fluid to the rolls fixed to the housing stand on the left side of the axial roller plane, and pipe 8, mounted on the casing body on the right side of the axial bulkhead plane. In one of the supports of the housing there is a longitudinal open groove 9 and two vertical through channels 10 and 11, while a pipe 7 is connected to the channel 10, and a pipe 8 is connected to the channel 11. Accordingly, one of the guides has a protrusion 12 that separates the groove the left and right chambers, and a longitudinal channel 13 to which the pipeline 6 is connected, and two vertical channels 14 and 15 communicated with a groove and located on both sides of the protrusion are made in the guide. Each vertical channel has a check valve.

The camp works as follows.

In the process of rolling, the cage body 1 with the work rolls 3 performs reciprocating motion along the guides 5 of the fixed bed 4.

When the working stand moves from left to right, the liquid in the left chamber is compressed, the check valve connecting the chamber with the longitudinal channel 13 closes and the check valve of the vertical channel 10 opens, through which the lubricant-cooling liquid under pressure enters the pipeline 7 and further to nozzles that feed the liquid to the rolls. At the same time, a vacuum occurs in the right chamber, the non-return valve installed in the vertical channel 11 is closed, and the non-return valve connecting the component, Comp. N. Smart

Editor T. ParfenovaTechred I. VeresKorrektor G. Reshetnik

Order 3516 / MT, 480Subscription

VNIIPI USSR State Committee for Inventions and Discoveries

1 13035, Moscow, Zh-35, Raushsk emb. 4/5 Production and Printing Enterprise, Uzhgorod, ul. Design. four

A new camera with channel 13 opens. The cooling lubricant from channel 13 under the action of vacuum in the chamber and the pressure supplied to the channel of the fluid quickly fills the right-hand chamber.

When the working stand moves from right to left, the liquid is compressed in the right chamber, and the vacuum is in the left chamber. At the same time, the coolant in the right chamber, with the valve 0 closed, installed in the channel 15, opens the valve of channel 11, and the pressurized fluid enters the pipeline 8. And the left chamber when the valve is closed in the channel 10 quickly fills the lubricant coolant from channel 13 through a non-return valve in channel 14, which was opened by vacuum in the chamber and pressure in channel 13. Then the process is repeated.

The proposed cold rolling mill 0 tube allows the supply of the required amount of coolant to the deformation center for each turn of the stand and thereby increase the reliability of the entire mill.

The proposed device also allows, due to the elastic resistance of the fluid in the chambers, to partially balance the dynamic forces that occur in the drive of the stand.

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Claims (1)

Invention Formula five ; Cold pipe rolling mill St. No. 1091952, characterized in that, in order to ensure the same supply of coolant to the deformation center during forward and reverse cage runs, it is equipped with an additional pipe with nozzles fixed on the stand body symmetrical to the main axial roll plane in the body support An additional vertical through channel is provided, communicated with the additional pipeline, and an additional vertical channel, respectively, connected with the longitudinal groove, along the guide a projection dividing the longitudinal slot 5 into two chambers, one of which is connected to a pair of main vertical channels with non-return valves installed in them, and the other with a pair of additional vertical channels with non-return valves installed in them.