SU757267A1 - Apparatus for cutting large-sized hollow shells - Google Patents

Description

The invention relates to the processing of metals by pressure, in particular to cutting equipment, and can be used 'for figure cutting pipes.

A known machine for cutting pipes, containing a cutting head with a cutting tool and with its feed mechanism, a pipe clamping and rotating mechanism, made in the form of two rings rotating on roller bearings with screw clamps, interconnected by a synchronizing mechanism and enclosed in a single housing vertical plane along the bed guides and having an opening for the passage of the cutting head | 1].

The disadvantage of the machine is the impossibility of figure cutting.

There is also a known method of cutting pipes, in which tools are pushed into the pipe from its diametrically opposite sides, one tool is retracted, a jumper formed during insertion of another tool is cut, one tool is inserted into the cut, the pipe is successively cut from two diametrically opposite sides around its perimeter to jumpers from another

2

the edges of the pipe and cut the jumper with one tool (2 |.

This method of cutting provides figured cutting of pipes of any cross-sectional shape.

₅ The closest to the invention to the technical essence is a device for cutting large-sized hollow shells, containing a turntable for attaching the shell and the cutting unit in the form of a rack, two consoles located per'0 pendicularly at both ends, and two cutting tools mounted on consoles and associated with rotational and radial displacement drives (3].

The known device can cut only large pipes. Cutting can be done at a limited distance from the pipe end, which especially limits the possibility of cutting openings for tees. This device has a complex kinematic scheme and is not reliable enough.

To expand technological capabilities, increase reliability

devices and providing a cutting method by successively introducing tools and running them around the perimeter of the pipe stand 757267

ka rigidly bonded with consoles and cutting tools installed with the possibility of independent radial movement. moreover, the cutting unit or rotary table is mounted for movement one relative to another.

The turntable can be made in the form of a hollow body with an opening for entering the console with a cutting tool and a figure ring mounted on its end with the possibility of rotation and carrying a device for fastening the shell.

FIG. 1 shows the proposed device, a general view; in fig. 2 - the same, top view; in fig. 3 given the kinematic diagram of the drive tool; in fig. 4 shows the types of figure cutting pipes.

The device comprises a rotary table 1 and a cutting unit 2, at least one of which is installed with the possibility of reciprocating movement relative to the other. The turntable 1 is made in the form of a hollow body 3 with an opening 4 and a figure ring 5 mounted on the end of the cylinder with the possibility of rotation and carrying device 6 for fastening the cut pipe 7.

The cutting unit 2 is made in the form of a rack 8, two consoles 9, rigidly with it bonded and supporting calipers 10, two cutting tools 11 and 12 mounted on calipers 10 and connected with individual rotational actuators 13 and radial displacement actuators 14. Cutting tools can be made in the form of a circular knife cutters. The drive 13 of rotation is made in the form of an electric motor 15 and a bevel gear gear 16. The drive 14 of radial movement is made in the form of an electric motor 17 and a bevel gear gear 18, a lead screw 19, with one gear 20 mounted on a nut 21 mounted on the lead screw 19.

The operation of the device is as follows.

The pipe (shell) 7 is mounted on the rotary ring 5 of the table 1 and is fixed by the device 6, while the table (rotary ring) is set at a given angle of cut.

The rack 8 with calipers 10, on which the cutting tools 11, 12 are mounted, is supplied to the shell, for example a fiberglass pipe. The lower console 9 with the lower caliper 10 and the cutting tool 12 enters the opening 4 of the table 1. Then the calipers 10 with the help of the actuator 14 begin to move the rotating cutting tools 11, 12 towards each other in the same plane, cutting into the shell to a given approach (position I) .

After that, one of the supports with the tool, for example with the tool 12 is retracted downwards, and the upper tool 11 continues to cut the remaining pipe jumper (position II). Then the lower tool 12 is inserted into the pipe 7 and due to the combination of the movement of the rack 8 and the caliper 10 (in a rectangular coordinate system) continue to cut into the wall of the shell (pipe), rolling it along the generatrix from above and below to the diametrically opposite side (position III), leaving jumper of a given value.

Then one of the supports with a rotating cutting tool, for example with tool 12, is retracted, and the top continues to cut the left jumper (position IV). After that, the calipers with cutting tools return to their original position.

The device expands technological capabilities, providing cutting hollow shells of various configurations and diameters from different angles, mainly fiberglass pipes in the manufacture of tees, bends. In addition, it can be used to obtain (cut) grooves along the diameter of parts of various configurations.

Claims (2)

Claim 1. Device for cutting large-sized hollow shells, containing a turntable for attaching shells and a cutting unit in the form of a rack, two consoles perpendicularly at both ends, and two cutting tools mounted on consoles and connected with rotational and radial displacement drives, different the fact that, in order to expand technological capabilities by expanding the configuration of cut shells, the stand is rigidly attached to the consoles and cutting tools are installed with the possibility of of radial movement, wherein the cutting assembly or a rotary table mounted for reciprocal movement relative to one another. 2. Device by π. 1, characterized in that the rotary table is made in the form of a hollow body with an opening for entering the console with a cutting tool and a figure ring mounted on its end with the possibility of rotation and carrying a device for attaching the shell.