CS272857B1 - Rotating cutting-off head - Google Patents

Abstract

The solution concerns a division of material with round cross-section by means of parting tools. These tools are firmly clamped in slide, which is positioned in grooves created in inwards direction in a rotor of a rotating head. On the rotor a ring is moving, which is equipped with conical projectures, on which there are guiding surfaces for pulleys that are attached on the above mentioned slide with clamped tools. The axial movement of the ring results in movement of slide in inwards direction, thus forcing the tools into bite. The device can be used everywhere where it is necessary to part materials of round cross-section, mainly tubes, for example for production of hydraulic cylinders, bearings etc.<IMAGE>

Description

The invention solves the cutting of tubes by rotating parting blades.

Circular or frame saws or rotating parting heads with parting blades are most often used for cutting tubes. drive sleeve. The use of a circular saw or a framing saw is not very efficient as it requires longer working times compared to a rotating parting head. The rotating parting heads with differential speeds between the rotating head and the drive are considerably dimensional, since providing different knife ejection speeds requires varying the speed between the rotating head and the drive, which complicates the solution and increases its dimensions. The above-mentioned disadvantages are overcome by the solution according to the invention.

The principle consists in rotatably supporting the rotor on the support body, in which rotor one or more guides intended for the movement of the carriage are provided in the centripetal direction, in which parting blades are suitable. These sleds are provided with pulleys, some of which may be displaceable for defining a dude. On the rotor, the ring with conical projections is positioned so that it can be axially displaced on the rotor, but cannot rotate against the rotor. The conical projections of the ring have at least two guide surfaces, on which the pulleys of said carriage roll. During axial displacement of the ring, the guide surfaces sit over the pulleys on the carriage and move them in the guide in the centripetal direction. On the ring there is formed a bearing for the yoke so that the rotation of the ring is not transmitted to the yoke, but the axial movement of the yoke to cause axial movement of the ring. The movement of the yoke with respect to the support body can be ensured in various ways, e.g. by means of linear hydraulic motors, or by means of a screw and a nut, where a thread is formed on the caliper as on a screw. By rotating the nut axially mounted in the support body, the yoke can be moved axially.

This solution achieves a significantly shorter working time compared to a circular saw or a hacksaw, because it is sufficient to cut off the pipe if the rotating parting blades are engaged to move the depth of the pipe wall while the circular or hacksaw has to pass the tool through the whole pipe diameter. Said solution consists of a small number of components arranged such that the cutting plane is at the end of the device, thus solving the problem of chips that can fall freely outside the device.

The attached figure shows a longitudinal section through a rotating parting head with a partial indication for fixing the cut pipe.

The rotor 2 is rotatably mounted on the support body 1 such that in its axis there is a pipe 10 to be cut and fixedly fixed by the clamping device 12. in the case of the rotor 2 two guides 3 for the movement of the carriage 4 are formed. which can be used to attach the parting knife in a suitable manner. The carriage 4 is provided with pulleys 5, the upper pulleys 5 being adjustable to define a dude. On the rotor 2, the ring 6 with the conical projections 7 is positioned so that it can be moved axially on the rotor 2, but cannot rotate relative to the rotor 2. The tapered projections 7 of the ring 6 have two guide surfaces on which the rollers 5 roll. The ring 6 also has a bearing for the yoke 8 so that the rotation of the ring 6 is not transmitted to the yoke 8, but axial movement of the yoke 6 to cause axial movement of the ring 6. In this case, the movement of the caliper towards the support body 1 is ensured by means of linear hydraulic motors 11. Rotation of the rotor 2 is ensured by means of a motor placed on the support body 1, whose pinion engages in the toothing 9. The engine is not shown. After fixing the tube 10 and rotating the rotor 2, a ring 6 is moved by means of hydraulic motors 11 through the yoke 8, whose conical projections 7 are pushed onto the pulleys 5 and pushed by the knife 4 with the knife into engagement.

The device can be used wherever it is necessary to separate the pipe material eg. for the production of hydraulic cylinders, roller bearings, etc.

Claims (2)

Rotating parting head with retractable parting blades and central storage of cut material, characterized in that the individual parting blades are mounted in individual carriages (4), the carriages (4) being equipped with rollers (5) and supported in individual guides (3), which are formed in a centripetal direction in the rotor (2) rotatably mounted on the support body (1), and also on the rotor (2) a ring (6) with conical projections (7) is mounted axially displaceable, the conical projections (7) having at least one guide surface for the pulleys (5) and also on the ring (6) is a rotatably mounted yoke (8) on which the piston of the hydraulic motor (11) mounted in the support body (1) is loosely mounted.