SU402427A1 - DEVICE FOR REMOVING AN INTERNAL GRAT - Google Patents

Description

I

Devices are known that permit the removal of the internal burr of the flare method, but THEIR disadvantage is the poor internal surface of the treated weld and the appearance as a result of the treatment of foci of corrosion.

The proposed device allows to obtain a high-quality internal surface of the pipe in the zone of the transverse weld seam without corrosion centers.

To this end, its working body is made in the form of a ball, irrespective of the installed and spring-loaded cutters with several rezush, their elements and edges, which limit the introduction of cutters into the body of the pipe.

Pa figs. shows a general view of the device; on fit. 2 is a section along A-A in FIG. I; in fig. 3 is a view B in FIG. 2

The device for removal of the internal flash consists of a splash drum I, a fork 2, pins 3, springs 4, cutters 5, an electric motor 6, a roller block 7 and a rod 8, and the cutter 5 has indented plates 9 of hard alloy. In order to protect the body of the pipes 10 and I from being cut by the cutter 5, there are edges 12 at its ends, with which it rests on the inner surface of the pipes 10 and 11.

The pipe end is installed relative to the device for removal of internal flash in such a way that the middle of the splash drum I is in the plane of the pipe 10 end. After that, the second pipe 11 is fed, which is welded to the first pipe 10. The device for removal of internal flash is moved to distance K, equal to the distance between the middle of the splash drum I and cutters 5 in the direction to the welded joint. Then the motor 6 is turned on.

rotating fork 2 with cutters 5, the latter are deflected under the action of centrifugal force, press a rat 13 having a temperature above 700 ° C and cut it off, after which the electric motor 6 is turned off and under the action of springs 4 the cutters 5 are deflected to their original position.

Subject invention

A device for removing internal burr containing an electric motor rod, an actuator and a drip drum relying on the inner surface of the pipe, characterized in that with the slit of obtaining a high-quality inner surface of the pipe in the zone of a peripheral weld without corrosion, the working element is in the form of hinged and spring-loaded incisors with several relieving elements and with edges that restrict the incisors of the incisors into the pipe body.

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