SU980970A1 - Portable apparatus for thermal cutting of pipes - Google Patents

Description

The invention relates to the flame treatment of metals.

A portable device for thermal cutting of pipes is known, comprising a carrier cutter carriage with a drive sprocket and a drive-chain spanning the pipe 1 to be processed,

The disadvantage of this device is a considerable time for setting up the cutting line.

It is also known portable device for thermal cutting of pipes, containing a drive carriage mounted on it with a cutter and magnetic wheels 2.

The disadvantages of this device are the need for significant time spent on setting up the cutting line, the design complexity and the metal content of the product, associated with the presence of a copying device in the form of copy rollers and a guide covering the treated pipe.

The purpose of the invention is to increase labor productivity by reducing the auxiliary time for tuning to the cutting line, simplifying the construction and reducing the weight.

This goal is achieved by the fact that, in a known device, we contain a driving carriage mounted on it with a cutter and magnetic wheels, the latter made in the form of two rollers whose width is greater than their diameter, while the axes of the rollers are rigidly fixed on the trolley and placed parallel to each other.

FIG. 1 shows the device; on 0 of fig. 2 section A-A in FIG. one.

The main components of the device are the drive carriage 1 with two magnetic wheels 2. Each wheel is a roller, whose width is greater than its meter. Rink

15 consists of an annular permanent magnet 3 and adjacent discs (magnetic circuits) 4, with which the roller is supported directly on the ferromagnetic surface of the pipe being processed.

Claims (1)

Each magnetic roller through axis 5 and bearings 6 is associated with a housing which consists of two halves 7 and 8 of magnetically soft steel, between which there is a separating dielectric strip 9. Inside the body there is a cylindrical boring in which a cylindrical rotary magnetic block is placed. The magnetic unit includes another permanent magnix 10 and two cylindrical segments 11 of magnetically soft material. The bodies of both rollers are connected to each other with the help of frame 12 in such a way that the axes of rollers 2 are rigidly fixed and parallel to each other. The manual drive of the device consists of a worm gear 13 and a handle 14. At the same time with the frame is mounted the holder 15 of the gas cutter. The device works as follows. In the position of the magnetic swivel unit shown in FIG. 2, the magnetic fluxes generated by the magnets 3 and 10 pass through the magnetically conductive parts 11, 7 and 8, are closed on the tube 16. This ensures the attachment of the magnetic wheel and the ferromagnetic surface with a clamping force of 10 kg / cm. Both rollers interlocking with the cylindrical surface of the pipe 16 self-aligning on it in the only possible position for normal adhesion, which is shown in FIG. 2, this position of the rollers relative to the cylindrical surface of the pipe is invariant to the movement of the pipe cutter around the pipe, which ensures that the pipe cutter moves strictly in a given plane. If necessary, remove the pipe cutter from the pipe and the cylindrical segments 11 of both rollers turn to ISO. In doing so, the magnets 10 are facing opposite poles facing the poles of the ring magnet 3, and the magnetic flux tends to short out inside the magnetic system. The magnets 3 and 10 neutralize each other, and the magnetic flux in the contact zone between the wheels and the tube becomes equal to zeros). The pressure of the wheels, respectively, is reduced to zero. Other designs of magnetic rollers are possible in this device. In particular, an electromagnetic wheel can be used in such a device, in which a magnetic field is created by a winding through which electric current flows. Compared with the known, the proposed device provides improved performance when it is used and also reduces the cost of metal and labor input during its manufacture. A portable device for thermally cutting pipes, comprising a driving carriage with a cutter and magnetic wheels mounted on it, characterized in that, in order to increase productivity by reducing the auxiliary time for setting the cutting line, simplifying the design and reducing the weight, the magnetic wheels are made form rtsvuh rollers, the width of which is greater than their diameter, while the axis of the rollers are rigidly fixed on the cart and placed parallel to each other. Sources of information taken into account during the examination 1. USSR author's certificate No. 4.86876, cl. B 23 K 7/04, 18,01,74, 2, Catalog of the company Kje Iberg-Eberje, 1964, p. 3 (prototype).