SU719810A1 - Method of removing inner flash in pipes - Google Patents

Description

The invention relates to the processing of metals by cutting, in particular, to devices for removing internal burrs in the stream during the manufacture of welded pipes. A device for removing internal grats in pipes is known, including a spring-loaded lever-type tool holder and a support that are hingedly connected between the robe, the tool with the support. -adjusting screw and cut-in depth limiters of cutter 1 The disadvantages of this device are the poor quality of the removal internally: about a burr and large time losses when replacing parts. . In order to improve the quality of internal, deburring and reduce the downtime of the mill for replacement of parts, a hollow socket was made in the tool holder of the proposed device, in which the cutter was freely installed, and the cutter had a through hole in which it was installed. the adjusting screw so that its end rests against the bottom of the socket at an angle "other than 90 ° not less than the angle of self-locking. Besides; A longitudinal section is made on the support, and a groove is made longitudinally on the tool holder; the tool holder and the support can be connected by means of them. In the tool holder there are additional blind sockets, in which the cutter tampers are freely installed, and on the lower surface of the support there are grooves, in which sliding inserts are made. The tool holder is provided with a screw, and in. The support has a blind socket, which has a spring inserted into the device and is capable of contacting the toolholder screw. FIG. 1 shows the proposed. device, general view; in fig. 2 - section A-A of FIG. one; in fig. 3 - section BB of FIG. 2. The device for removing the internal flash consists of a tool holder 1 having a blind socket 2 into which the cutter is inserted 3. The tool holder is spring-loaded with a spring 4 installed in the deaf socket 5 of the support 6. The tool has a threaded bore 7 through which the support-adjusting screw is screwed the screw 8, which is supported by the end in the excellent bottom of the socket at an angle of 90 ° not less than the angle of self-braking and having in the upper part of the slot a screwdriver.

Croye; tneeda cutter tool holder has vertical sockets Q ,,. ia which are free. Limiters 10. On the bottom surface of the support 6 are made longitudinal half-open grooves 11, S which are inserted sliding inserts 12. To join the tool holder 1 and Support 6, the axis 13 is used, in addition, the support longitudinal protrusion 14, which is included in the groove 15, is used on the support. E) ёццёйжател 1. With the help of the shank 16, having a thread, the device is set in the line of pipe-sleeves | t: | on to the rod 17 and stop in the required position from screwing

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The device works as follows.

 thus, the spring inserts the device into the pipe, 4 presses, the tool holder 1 from the support 6 and the tool holder, due to the rotation around the axis 13, deviates to the extreme (inclined) position. When the mill starts to work, when the device is introduced into, the latter gradually lowers the tool holder that is deflected upwards, then the tube goes to the limiters 10 and lowers the spreader even lower - to its working position. When etsm spring 4 is compressed and ensures the pressing of working surfaces is limited to the upper part of the inner surface of the pipe with a force, it is more sufficient: for cutting the cutter into a hot burr, 1 hp 6) 1) during welding

pipes. The internal burr is cut in aEDO chips, passes through the groove, falls to the bottom of the pipe and leaves together with the moving pipe. Pipe sections, including transverse junction, or pipe sections welded from defective steel tape sections (with torn, us, bundle and other defects) and K) have an undersized inner diameter, therefore, when cutting grata, the support and tool holder come closer at the expense of Shyo; but the log of their clearances by turning the toolholder around the axis 13 and squeezing 4. Thus, the presence of the spring 4, the axis 13 And the technological gap between the support and the tool holder ensures that the device works at any; n) possible. The iMiWif of the inner diameter from the norm, the stability of the cutter's retention on the CIHI of the inner burr, especially in the pipe sections with cross-section joints, is ensured by increasing the rigidity of the structure by means of the junction bar and the rezerceter using the longitudinal protrusion by means of the longitudinal protrusion by means of the longitudinal projection by joining the constrictor and the rezerter by using the longitudinal projection, by using the longitudinal protrusion by means of the longitudinal projection the protrusion 14, the same nnb and ai support b, and about the length of the slot 15 of the toolholder / in which this protrusion is located.

The adjustment of the cutter relative to the working surfaces of the limiters (adjustment of the cutting edge height) is performed in the following way.

The pipe-welding machine stops, s, the non-welded pipe section is permanently pressed to the cutter installation site and the adjustment screw is turned to the required angle with a screwdriver.

The cutter design with an adjusting screw allows, firstly, adjusting the cutting edge relative to the working surfaces of the limiters, and, secondly, despite the vibration of the screw in the pipe and the distance between the cutting edge and the bottom of the toolholder slot, despite the vibration in the pipe. These positive features of the device allow you to improve the quality of the removal of internal deburring, exclude cases of cutting the tool into the pipe body, and thereby reduce the load on the tool and increase it with Toyota (duration of work).

The free installation of the cutter 3 in the socket of the tool holder allows it to be replaced quickly in case of wear of the cutting edge or its chipping.

The order of operations is similar to that described when adjusting the tool, but only the tool is not adjusted, but is removed and a new one becomes in its place. In this case, Sun, the replacement operation of the tool takes no more than 5 minutes. Freely installed limiters 10 and. inserts. 12 can also be quickly replaced if they wear out beyond the permitted floor. When measuring all the sliding supports, the time for the mill is only 20-25 minutes.

In order to avoid scratches on the inner surface of the steel pipe, the sliding inserts are made of cast iron. When processing pipes, for example, with a diameter of 63.5 mm, the allowable wear field and at the slip inserts and at the stops are 4. mm, which ensures, as experiments have shown, durability, about 32-40 hours of work

Due to the simplicity of the design, the proposed device can be small in size and provide high-quality removal of internal burrs in a continuous line. pipe mill also for pipes with diameters, up to pipes with an inner diameter of 25 mm.

Claims (4)

1. Device for removing internal flash. in pipes, including a spring-loaded lever-type tool holder and support, which are pivotally interconnected, a tool with an adjusting screw and limited the cut-in depth of the tool, so that, in order to improve the quality of removal internal burr and reduced downtime for the replacement of parts, in the tool holder there is a blind socket, the cutter is freely installed, and the cutter has a through-threaded hole in which the adjusting screw is installed so that its end rests on one socket up to an angle of OS other than 90 ° not less than the angle of self-locking. 2. The device according to p, 1, o t is -. This is due to the fact that a longitudinal protrusion is made on the support, and a longitudinal groove on the tool holder. 3. The device according to paragraphs. 1 and 2, which is characterized by the fact that the tool holders have additional deaf gnees in which the cutting edge of the tool is freely installed, and the slide inserts on the bottom surface of the ball mount are fully installed. 4. The device according to claim 1, I distinguish it with the fact that the tool holder is provided with a screw, and the support has a blind socket in which a spring inserted into the device is installed with the possibility of contact with the tool holder screw. Sources of information taken into account in the examination S 1. USSR author's certificate No. 401452, cl. B 23 B 5/16, 1971. 77 " LA / 4fig. g US.f Ss  . 3