SU1323153A2 - Apparatus for intermittent cutting of inner flash in longitudinally-welded tubes - Google Patents

Abstract

The invention relates to devices for removing internal deburring in longitudinally welded pipes and can be used in the manufacture of pipes from non-magnetic materials, mainly from non-ferrous metals. The device allows to improve the quality of removal of internal debts by controlling the process. roller, obak baking intermittent cutting grata, made of magnetized. A magnetically controlled contact (reed switch) is installed outside the pipe in the area where the roller is located, operating at a frequency corresponding to the frequency of rotation of the copier roller. The pulses from the sensor (yorkon) are analyzed by the control unit, which, in the event of a mismatch of the pulse frequency of a given magnitude, gives the actuator a command to stop the mill. 4 il. N)

Description

eleven

The invention relates to devices for removing internal flash when fabricating longitudinally welded pipes from non-magnetic materials, mainly from non-ferrous metals.

The purpose of the invention is to improve the quality of removal of internal debts.

Fig, 1 shows a device, a longitudinal section of the pipe during the period of removal of the cutter and the operation of the control unit; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB and B-B in FIG. one; in fig. 4 - control unit.

The device consists of a body 1, which is located inside the welded pipe 2 on elastic supports 3 and 4. The body has a through longitudinal groove 5 in which lever 7 is placed on the axis 6 with the possibility of swing. KonHpHbu i roller 8 is freely located on axis 9 in the groove 10 levers.

The working sections (protrusions) 11 and 12 of the copying roller (Fig. 2) are magnetized and made, for example, in the form of a flat magnet of the corresponding configuration embedded in the roller. In this case, to eliminate the magnetic closure, the waves are made of a non-magnetic material, such as stainless steel;

bent steel

The lever is spring-loaded with respect to the support surface of the spring pipe 13. At the end of the lever, a cutter 14 is fixed to remove burrs 15. In the front part of the housing 1 there is a guide groove 16 designed for its orientation along the burr line. On the other body of the body, the cutter 17 is fixedly mounted, which serves to remove the remaining flash.

The housing is fixedly mounted on the end of the tool rod 18 by means of a threaded joint. A magnetic control contact (reed switch) 19, which is included in the electrical circuit of the control unit 20, is installed outside the pipe at the location of the camcorder roller crane.

The COCTOEIT control unit consists of the following standard functional elements: a reference signal generator 21, a reference signal and control signal converter 22 (a two-channel Schmidt trigger), and an EXCLUSIVE 1SH 23 logic element.

YcTpoficTBo works as follows.

five

25

thirty

35 40

g ch

: -,

532

A burr 15 formed on one-sidedly moving (indicated by an arrow) welded pipe 2 passes through groove 16 and is cut off by a cutter 14. The copy roller 8 contacts the wall of the pipe and rotates. In the working position, the roller lowers the lever 7 with the cutter 14, compressing the spring 13. The cutter 14 moves out of the cutting zone and carries out chip separation. The remaining burr is cut by the cutter 17. In the working position of the roller, the magnetized protrusions 11 and 12 are in the zone of actuation of the reed switch 19, the contacts of which are closed. A short-term current (pulse) flows through its circuit.

The reference signal generator 21, for example, a multivibrator, produces signals (pulses) with a frequency equal to the response frequency of the pickup roller and the reed switch. Next, the signal enters one of the channels of the converter 22, where it is converted from a sinusoidal to a rectangular one. At the same time, a signal comes from the sensor (reed switch) 19 of the device, which is also converted to a rectangular one. Both signals then arrive at the EXCLUSIVE OR 23 and are read. In this case, the signal at the output of the block is missing.

The current pulses flow with a certain frequency. (The speed of the tube moving is constant) with each actuation of the copy roller and is fixed by the control unit. If one or several pulses are missing (determined by the program of the control unit) after a predetermined period of time (for example, roller 8 stops rotating as a result of spring 13 failure or for some other reason) and the process of crushing of burrs ceases, a stop signal appears at the output of the control unit electric welding mill

Claims (1)

The present invention allows for partial monitoring of the operation of the device and improving the quality of the chip splitting process when removing internal burrs in longitudinally welded pipes of non-magnetic materials. Invention Formula A device for intermittent cutting of internal bur in longitudinally welded pipes according to auth. No. 1269872, 313231t3 characterized in that, see: contact, BK / muieiiKiiiM P circuit in order to improve the quality of the removal of the control block and to install; tem1m in the internal grata in pipes from the nonmag-nsr location of the copy roller, and nitng materials, the device supplying the sections of the copier rollers is squeezed by the control unit and the magnetic control; polpeny magnetized. (rig 2 Editor I.Klsarda Download 2897 / Circulation 732 Subscription VNIIPI USSR State Committee on inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Proipn 1 1 hm | p | o-1toligraphic enterprise, Uzhgorod, Projecto st., 4 F1 / HL Compiled by E. Vetrova Tehred I.Popovich Proofreader L. Bezkid