SU969464A1 - Method for trimming hollow products - Google Patents

Description

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The invention relates to the processing of metals by pressure and can be used mainly for trimming the edges of box-shaped parts and cylindrical vessels that are open on one side.

 A device for cutting hollow products is known, comprising a cutting mechanism made in the form of two circular knives mounted on shafts, a unit for installing a cut product and a drive for rotating circular knives tj.

The known device does not allow high-quality trimming of edges on poor parts, such as stamped semi-tubes, since continuous cutting of low-hard edges with circular knives causes the edges to retract from the component cutting forces and distort the cutting plane.

In addition, the known device is difficult in terms of its construction, since to operate it requires a mechanism for rotating the cut

the details.

The purpose of the invention is to improve the quality of trimming and simplify the design of the device.

For this purpose, in the device for trimming hollow products, containing a cutting mechanism, made in the form of two circular knives mounted on wagons, the installation unit for the cut product and the rotational drive of the circular knives, each of the circular knives are made with two cutting edges, one of them is made covering, and the other - covered, while the covered circular knife is made with the relevant edges that are not equal to its axis, and its shaft is made eccentric.

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1 shows a device for trimming hollow products, a general view; figure 2 - section aa in figure 1; on fig.Z HAZEL T in figure 1.

On the base 1 on the rotating shaft 2 3 there is fastened an enclosing blade 3, which receives rotation through a chain or gear drive from the drive k. A knife 3 made with two cutting edges 5 and 6 (see fig. 3) interacts with a circular disk knife 7 having also two cutting edges 8 and 9. Rotation to the male knife 7 is transmitted from the shaft 2 on which the female knife is mounted 3 through gears 10 and 11. The knife 7 is fixed on an eccentric shaft 12 mounted rotatably in a bore of a shaft 13 offset from the axis of rotation of this shaft. The cam of the eccentric shaft 12 (on plunging) is rotated by rotating the knob 1 j fixed on the shaft of the worm gear pair, the wheel of which is rigidly mounted on the eccentric shaft 12T In the groove between the cutting edges of the knife 3 a cutter 15 is mounted The cutter 15 is designed to retract the cut ribbon from the cutting edges of the male knife, i.e. to remove tape waste.

The device is equipped with a table 16, made movable in height. The workpiece 17 is mounted either directly on the table 16 or is fixed on the intermediate support plate 18.

The device works as follows. :

The workpiece 17 fixed on the fixture-support 18 is mounted on the table 46 so that one of the knives, for example the male knife 7, is located inside the workpiece. When the part is installed, the table 16 is moved and the handle Vk rotates the eccentric shaft 12 and then sets it to its original position, ensuring normal cutting conditions. The drive k of the blades is turned on and the trimming of one edge is carried out with the automatic feed of the part around the perimeter of the trimmed edge. In this case, the narrow allowance band is retracted from the zone of cutting edges by the cutter 15.

The proposed device for trimming hollow products has a simple design and improves the quality of trimming.

Claims (1)

1. USSR author's certificate No. 205518, cl. B 23 D 19/0, 19b5.