SU1222359A1 - Arrangement for expanding tubular billets - Google Patents

Description

The invention relates to the processing of metals by pressure, namely sheet metal forming, and can be used in mechanical engineering for the production of vessels and other similar parts with double walls.

The purpose of the invention is the expansion of technological capabilities in the distribution of blanks with any wall thickness.

The drawing shows the proposed device, a General view in section and diagram of its work.

The device comprises a rigid punch 1, at the apex of which a cavity is made with the workpiece fastening mechanism 2 located, which can be made, for example, in the form of a split conical washer mounted coaxially with the punch, supporting the workpiece element, made in the form of a cage 3 in the form of a hollow cylindrical the housing 4, wherein the housing 4 is connected to the punch 1 via the rod 5, for example, by means of a screw connection, to the punch completely.

The holder 3 is mounted relative to the housing 4. The proposed device was tested with the possibility of axial movement, in the form of a pipe of 046X0.4 mm made of aluminum, under the action of the crosspiece of the press. Low alloy. As a source of work, in the case of the supporting e-pressure, a hydraulic station is used, the hole 6 is made from the maximum, which is through a maximum fluid pressure of 6.3 MPa and the pipeline is connected to an independent source with a capacity of 5 liters / min. The movement of the sweeper to create a working fluid pressure (not shown), in which quality can be used, for example, a hydraulic station.

The device works as follows.

The movable element is carried out using a hydraulic press. At a pressure of 5.5 MPa, the workpiece touches the movable element, and then at constant pressure, it is deformed by means of a thin-walled tubular billet of a controlled movement of the movable element onto the punch 1 and fixed by means of the fastening mechanism 2. Then install the housing 4 and using the rod 5 is fixed relative to the punch 1. On the housing 4 set the holder 3 and placed at a speed of 100 mm / min. The result is a cylindrical part with a double wall, an outer diameter of 60 and an inner diameter of 50 mm, the length of the part is 150-170 mm, which is ten times greater than at

put the device in. The working area of the press, where 5 using a known device, fasten the holder 3 to the traverse of the press. Offed device greatly

external source fluid under pressure q through the opening 6 is fed into the internal cavity of the tubular billet 7, while the packing is deformed and distributed into the gap Q

between the punch 1 and the housing 4, the expansion (up to more than 10-15 times) technological capabilities in obtaining thin-walled cylindrical parts with a double wall and parts with a small angle of taper.

Turn it over. At the moment of contact of the workpiece with the holder 3 drains, its axial movement occurs, while the holder 3 captures the workpiece by the force of active friction that occurs between the surfaces of the workpiece and the holder 3, and subsequently deforms it. By varying the pressure, you can increase or decrease the strength of the active friction, thereby providing optimal conditions for the deformation of the workpiece, which depend on the material used, the geometry of the workpiece, the part to be obtained and other conditions. Upon reaching the required length of the resulting part (which can be infinitely large), pressure q is released, the holder 3 is lifted and the obtained part is removed.

The device provides two-wall cylindrical parts, parts with a conical inner wall of single-wall parts, when the workpiece is turned over

The movable element is carried out using a hydraulic press. At a pressure of 5.5 MPa, the workpiece touches the moving element, and then at constant pressure, it is deformed by axial movement of the moving element at a speed of 100 mm / min. The result is a cylindrical part with a double wall, an outer diameter of 60 and an inner diameter of 50 mm, the length of the part is 150-170 mm, which is ten times greater than at

 using a known device, the proposed device significantly

using a known device, the proposed device significantly

expands (up to more than 10-15 times) the technological capabilities in obtaining thin-walled cylindrical parts with double walls and parts with a small taper angle.

Claims (2)

1. DEVICE FOR DISTRIBUTION OF TUBULAR Billets, containing a rigidly fixed punch, on the free end of which a cavity is made with a workpiece attachment unit located in it, and also an element in the form of a hollow cylindrical body with a channel for supplying working fluid to the internal cavity installed coaxially with the punch blanks, characterized in that, in order to expand technological capabilities by ensuring the distribution of pipe blanks with any wall thickness, the blank supporting the blank wives covering the cylindrical body with a cage installed with the possibility of reciprocating axial movement while sliding along the outer surface of the cylindrical body and the formation of an annular gap between its inner surface and the outer surface of the punch to guide the movement of the workpiece material during deformation. 2. The device according to π. 1 characterized in that the hollow cylindrical body is connected to the punch by means of a rod. I / *