SU1278109A1 - Apparatus for cutting - Google Patents

Abstract

The invention relates to the field of mechanical engineering and can be used to repair pipes in hard-to-reach places during installation and dismantling of pipeline systems. The aim of the invention is to increase the cutting performance by making it possible to select the optimum cutting conditions. On the device body there is a mechanism for fixing the device on the pipe being processed, faceplate 6 with tool holders and a drive for feeding them, made in the form of a lead screw 28, kinematically connected with the drive for feeding the cutters. The device is attached to the pipe to be treated. When the drive is turned on, the faceplate 6 is turned into a crush, as a result of which the pusher 22 pushes onto the working face of the drum 18. At the same time, the lever 16 folds on the axis 20 and 1 segment 17 moves out of the body. Wheel 25 rolls around (L ND CX) o

Description

through the serrated portion of segment 17 and through gears 26 and 27 transmits rotation to the drive screw 28, with which the tool holder is connected. Multifaceted drum 18 is made so

the way that the faces have different lengths, and is equipped with a rotation mechanism that provides the possibility of choosing the optimal feed during cutting. 1 zn f-ly. 5 il.

one

The invention relates to mechanical engineering and can be used for cutting pipes in hard-to-reach places when carrying out installation and dismantling work on chemical, metallurgical, power and other installations.

The purpose of the invention is to increase the cutting performance by making it possible to select the optimum cutting conditions.

The goal is achieved by installing a two-armed lever in the case, on one shoulder of which a multifaceted drum is mounted, which has the ability to interact with the pusher and fuse. emphasis in the form of a segment, spring-loaded relative to the body and having; its ability to interact with the other arm of the two shoulders.

FIG. 1 shows a device for cutting pipes, a general view; in fig. 2 — securing mechanism; in fig. 3 shows section A-A in FIG. one; in fig. 4 shows a section BB in FIG. 3; in fig. 5 shows a section B-B in FIG. 3

The device for cutting pipes comprises a housing 1, inside of which a split gear 3 connected to a drive 4 gear 5 is installed on the guides 2. A split plate 6 is fixed to the detachable gear 3, containing the guides 7 in which the tool holders 8 with cutters 9 are mounted. split gear 3 installed in special locks (not shown) and secured with latches 10.

On the reverse side of the housing 1 there is a mechanism for securing the device, consisting of two clamps 11 and 12 mounted on rolling pins 13. The screw actuator 14 is fixed in the housing 1 and connected to the clamp 11 of the 15th leg. In the inner part of the housing 1 there is a lever 16, one shoulder of which is located under the extendable segment 17, and a multifaceted drum 18 is installed on the second. Each face of the drum 18 has a certain length.

The fastening of the lever 16 to the housing 1 is carried out by the axis 19, and the multifaceted drum 18 to the lever 16 by the axis 20 connected with the feed amount switching handle 21. The lever 16 in the place of attachment of the axes 19 and 20 is made in the form of a fork.

Each tool holder 8 is provided with a feed start mechanism consisting of a pusher 22 mounted in detachable gear 3 and pressed by a spring 23 to a bar 24 which is attached to the tool holder 8. The bar 24 is a reference line for the amount of movement of the cutters 9. The second end of the pusher 22 is located at the working face of the multifaceted drum 18. In the guides 7 on fixed axles

wheels 25 are installed, which are adapted to interact with the extendable segment 17 and with the aid of gears 26 and 27 connected with running screws 28, which are installed in the guides 7, which can interact with the nuts of the tool holders 8. Retractable segment 17 is recessed into the housing 1 in the initial position springs 29.

Before operation, the cutters 9 are patterned and fastened. Slats 24 are mounted on predetermined travels of the cutters 9. The washer 6 is installed above the housing 1 and in this position the parts of the detachable gear 3 are undocked, and the clamp 11 is removed from the peelers 13. In this position, the housing 1 is put on the treated pipe. Then install the clamp 11 on the rolling pins 13. With the help of the screw drive 14 and the gig 15, the device is preliminarily without tightening fixing the device on the pipe. Preparation for work is completed.

after installing the detachable part of the split gear 3, securing it with clamps 10 and tightening the device on the pipe. The actuator 4 is turned on, from which the rotation is transmitted to gear 5 and further to detachable gear 3 with faceplate 6.

The pusher 22 rotates together with the faceplate 6 and pushes onto the working face of the multifaceted drum 18. At the same time, the lever 16 turns and pushes the sliding segment 17 out of the housing 1. The wheel 25

pushes against retractable segment 17 and, rolling on it, rotates. The gear attached to the wheel transmits rotation to gear 27, which rotates the spindle 28. The holder 8 with the cutter 9 receives axial movement in one

Claims (2)

faceplate rotation - feed, the value of which is proportional to the angle of rotation of the lead screw 28, which is proportional to the length of the working face of the drum 18, which is installed under the pusher 22. After the pusher 22 of the working face of the multifaceted drum 18 of the spring 29 is inserted, the extension segment 17 is inserted into the body 1, ending its interaction with the wheel 25 and turning the lever 16 on the axis 19 in this case. The bar 24 moves with the tool holder 8 and holds the pusher 22 with its lower end in the recessed position throughout the entire working The cutter 9. The end of the working stroke of the tool is determined by the moment when the lower end of the bar 24 disappears from the upper end of the pusher 22, which is pushed upwards by the spring 23. In this case, the tool holder 8 does not receive movement from the spindle 28, since the passage over the multifaceted drum 18, the pusher 22 does not interact with it, and the sliding segment 17, which remains recessed in the housing 1 under the action of the springs 29, does not interact with the wheel 25. If it is necessary to change the feed amount by the handle 21, the axis 20 is turned and set, under the pusher 22, that facet of the multifaceted drum 18, the length of which corresponds to the selected feed rate. The proposed device allows to increase the productivity of work when cutting pipes, especially when multi-tooling complex pipe end grooves, by adjusting the feed rate to obtain optimal processing conditions. Claim 1. A device for cutting pipes, comprising a housing on which a mechanism is mounted for fastening the device on the pipe being cut, a faceplate with tool holders and a feed mechanism, made in the form of a driving spindle kinematically associated with an abutment and pusher, characterized by that, in order to improve the cutting performance by choosing the optimal supply of the cutting tool, it is equipped with a two-arm lever mounted in the housing, on one arm of which a lot of ranny drum having an interaction with a pusher, and the abutment is formed as a segment of a spring-loaded relative to the housing and having an interaction with the other arm a two-armed lever. 2. The device according to claim 1, characterized in that the faces of the multi-faceted drum are made of various lengths. 24 (Fig. 2 Bb 20 25 .five