SU984725A1 - Apparatus for cutting tubes - Google Patents

Description

Union of Soviet Socialist Republics

State Committee

USSR

DESCRIPTION OF THE INVENTION

TO AUTHOR'S CERTIFICATE <11) 984725 for inventions and discoveries (61) Additional to the auto certificate - (22) Notified on 08/20/81 (21) 3338180 / 25-27 with the application No. - (23) Priority -

Published 12/30/08. Bulletin No. 48

Date of publication of the description 05.01.83 (51) M. Cl. ³

B 23 D 21/00 (53.) UDC 621.965 (088.8) (72) Author

The invention relates to the field of procurement of machine-building enterprises, namely, devices for cutting, and can be used when cutting pipes into workpieces.

A device for cutting pipes into 5 workpieces is known, containing a base, a matrix mounted on it, as well as a flat wedge knife and a knife moving drive [1].

A disadvantage of the known device is the low quality of the resulting workpieces, which is a consequence of the deformation of the pipe wall in the zone of introduction of the knife into it.

parts pivotally connected to each other by the middle part, while the knife displacement drive is made in the form of a movable slide and pivotally connected to the knife parts and the “slide” of two levers, and the stops are arranged to interact with the ends of the knife parts associated with the levers.

The drawing shows a device for cutting pipes, General view.

The device comprises a knife, consisting of two parts I and 2, connected by levers 3 and 4 with a slider 5, stops 6 and 7, a matrix 8, mounted on the base 9,

The device operates as follows. OBJECT OF THE INVENTION - improving the quality of the resulting workpieces.

To this end, a device for cutting pipes into workpieces containing a base, a matrix mounted on it, as well as a flat wedge knife and a knife movement drive, is equipped with two stops symmetrically located relative to the vertical plane passing through the axis of the pipe being cut, the flat wedge knife is made of composite two symmetrical zooms. ·

When the slider 5 moves downward, the knife incurs into the pipe wall 10. When the knife edge reaches a distance equal to the pipe wall thickness, the wedge parts of the knife come in contact with the stops and the stops interact with the knife parts, as a result of which the knife parts rotate around the axis. At the same time, the tops of the wedges will diverge, exerting pressure on the pipe wall from the inside, artificially increasing its rigidity, thereby reducing the downward deflection of the wall. In addition, the wedge angle decreasing with rotation of the knife parts helps to reduce the indentation of the wall inward. When the cutting of the upper section of the pipe ends, the knife parts come out of contact with the stops and the wedges converge together. The lower part of the pipe section is cut similarly to cutting with a whole wedge knife. After cutting, the knife returns to its original position.

The use of the invention allows to improve the quality of the resulting workpieces by eliminating the deformation of the pipe wall in the penetration gap of the knife.

Claims (1)

Claim A device for cutting pipes into workpieces containing a base, a matrix mounted on it, as well as a flat wedge knife and a knife movement drive, characterized in that, in order to improve the quality of the obtained workpieces, it is equipped with two stops symmetrically located with respect to a vertical plane passing through the axis of the pipe being cut, the flat wedge knife is made up of two symmetrical parts articulated between one another with its middle part, while the drive for moving the knife 10 is made in the form of a movable floor una and pivotally connected with the blade portions and two slide levers and the stops are arranged to cooperate with the ends of the blade portions associated with the levers.