SU1313593A1 - Method of hot cutting - Google Patents

Abstract

The invention relates to rolling production, in particular, to methods for dividing rolled products into measured lengths. The purpose of the invention is to increase productivity. Hot cutting, measuring workpieces such as rods in a stream are carried out by transporting piece 1 to the stop 3 by clamping, cutting, and removal of cut off measuring workpieces 6 is performed with acceleration, and the time of transportation of the workpiece 6 is determined from a ratio of 0.1 t,: where t - transportation time of the measured billet; t - time of transportation of the piece, 3 sludge. 1 tab. from 00 SP 00 jig.g

Description

1} 3

This invention relates to rolling production, in particular, to methods for dividing rolled products into measured lengths.

The purpose of the invention is to increase the pro. performance.

Fig. 1 shows a flow chart of the method at the time of the measurement; Fig. 2 is a flow chart of the method after cutting at the start of transportation; FIG. 3 shows a scheme for carrying out the method at the moment of lowering the stop.

The hot cutting method is carried out as follows.

Hire 1 with a section of 150.fl50 mm after forming in the finishing stand of the rolling mill is transported along the roller table 2 at a speed of 2 m / s (the roller table has two sections with independent control, separated by the axis of the saw blade). As soon as the front end of the workpiece passes the axis of the saw disk 3, the roller table slows down, clamps 4 are turned on, fixing the rolled stock, and the rotating saw disk 3 mounted on the saw cuts off the front end of the piece. The cut end is disposed of, and the roller table 2 is turned on again. The trunk of support 5 is simultaneously lowered (the lowering time is 2 seconds). The car 1 is lowered to the stop, rests on its trunk and stops. Thus, a length of 12 m is measured (the time to feed the workpiece is 6 s). Then the clamp 4 is turned on (operation time 1 s) and the saw blade 3 at a feed rate of 300 mm / s is fed to the rolled metal and after cutting the measured workpiece 6 returns to its original position (the time spent on cutting and returning the disk is 8 s). At the time of the end of the cutting, a command is given to raise the trunk of the abutment (2 s and release the rolled stock from the stitching a (l s). After that, the retraction of the cut part begins, delaying the retraction of the main piece in 1-2 s. using the accelerated rotation of the rollers of the section located behind the saw, or with the help of a special mechanical device. Thus, in the first 2 seconds of movement of the measured piece, its speed is about 5 m / s. 1-2 seconds after the start of movement, the speed of the splash decreases up about Orginal

35932

up to 2 m / s, and at the same time the section of the roller table is turned on to the saw and the main thing starts to be supplied for measuring length,. Further transport of the measured workpiece and the piece occurs at the same speed, but between them there is a gap D 4-6 m,

After passing through the measured workpiece of the stop, its trunk is lowered into the resulting gap between the workpiece and the piece. The thing slows down and rests against. trunk. The cutting cycle is repeated in the sequence described,

As a result of industrial experiments conducted on various types of stops, it was found that a gap of 4–6 m provides an unobstructed lowering of the trunk of the stop into the gap between the strips and trouble-free operation of the entire stop. In this case, the ratio between the time of transportation of the measured workpiece and the brush should be less than 0.6 and more than 0.1. In this case, taking into account the periods of acceleration of the roller table and the band t, 3c, at2. 6c. Thus, a ratio of 0.5, which is 25

thirty

It is within acceptable limits.

The stop response time should not be less than 1 s at an Olgang speed of 2.0 m / s or less than 2 C at a speed of 5 m / s,

The model of the blank was transported square 50,

The test results are shown in the table.

Claims (1)

Invention Formula The method of hot cutting of dimensional blanks such as rods in a flow, in which the piece is transported to the stop, clamped, cut and retracted, cut off dimensional blanks, characterized in that, in order to increase productivity, the retraction of the cut off dimensional blanks is performed with acceleration, and transporting the workpiece is given by 0.1 1. 0.6, g where t, is the transportation time of the measured workpiece; t is the time of transportation of the piece. Compiled by N.Finn. Editor A.Ogar Tehred N.Glushchenko Order 2162/12 Circulation 976 Subscription VNIIPI of the State Committee. USSR on Inventions - and Discoveries P3035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 qDt / g. J Corrector S.Cherni