SU1087226A1 - Apparatus for extrusion of hollow parts having internal waffer finning - Google Patents

Abstract

A device for ejecting hollow parts with an internal wafer from the ring blanks, containing a container and a detachable core placed inside it with a wafer-like relief on the surface of the container, which was designed to improve the design possibilities and improvements. a set of ring sections, each of which consists of interconnected sectors, equipped with a drive for their radial movement, while the adjacent side sections parts of the surface of the sectors are acute. (L

Description

The invention relates to. (Metal processing by pressure, namely, devices for extruding hollow parts with internal wafer fins, and may find a wide application in the engineering, aviation and other industries

A device for extruding parts with an inner waffle and ribbing from ring blanks is known, comprising a container and a detachable core disposed inside it with a relief of wafer finning on the surface facing the container l.

A disadvantage of the known device is limited technological possibilities, since it allows to obtain fins with a fin height of more than 4-5 thicknesses due to the limitation of the stroke of the outer container.

In addition, in the manufacture of wafer fins in large-sized parts, there is a reduced productivity due to the fact that with an increase in the dimensions of the parts, the pressing force increases, which leads to an increase in the dimensions of the containers, and hence to an increase in the time of their heating and cooling.

The purpose of the invention is to expand the technological capabilities of the device and increase productivity

The goal is achieved by the fact that in a device for inserting hollow parts with internal wafer fins from ring blanks containing a container and a detachable core disposed there with a relief of wafer fins on the surface facing the container, the container is made in the form of a set of ring sections each of which consists of interconnected sectors that are driven by their radial movement, while the adjacent lateral surface areas of the sectors are acute.

FIG. 1 shows a device construction diagram; in fig. 2 section A-A in FIG. one; FIG. 3 is a section BB in FIG. 2

A device for extruding parts with internal wafer fins consists of a container formed by sections consisting of sectors 1, a detachable core 2, installed62

3 and a clamp-on to the zishka 4. The core and the clamp are fixed on the base 5. On the ring billet mounted on the core 2, put the container sections, consisting of separate sectors 1, interconnected by a separator 6. The upper part of the device consists of a wedge 7 fixed on the plate 8, which drives the radial movement of the sectors.

The lower part of the device thus assembled is preheated by an inductor or built-in heaters. When reaching a predetermined temperature equal to the maximum temperature, the plasticity of the deformable metal, the process of deformation begins. Wedge 85 lower down; affects the beveled surface on the upper annular section of the container,

The section sectors begin to move radially, pressing in the wafer fins at the height H of the workpiece. The metal, displaced into the initial gap between the acute-angled portions of the sectors' surfaces, is first crushed, and then with a further reduction of the gap between the sectors, it cuts off into the breaks, allowing the sectors to move radially by a specified amount.

With further downward movement, the wedge 8 acts on the next section, which, moving radially, causes wafer fins on the subsequent surface of the workpiece. The extrusion continues until the wedge 8 moves all the sections in succession and does not press the wafer fins over the entire surface of the workpiece. The extrusion force depends on the height H, which is chosen constructively depending on the power of the existing facilities or presses.

At the end of the pressing process, the container sections are diluted and removed from the part. The manufactured part together with the releasable core is removed from the retainer and the core is pulled out of the part.

The device allows forming wafer fins with a height equal to 5-6 times the thickness of the part's web, due to the large radial movement of the sectors, due to

Claims (1)

DEVICE FOR EXTRACTING HOLLOW DETAILS WITH INTERNAL WAFFEL FINING from ring billets, containing a container and a split core placed inside it with a waffle fins relief on the surface facing the container, characterized in that, in order to expand technological capabilities and increase productivity, the container is made in the form of a set of annular sections, each of which consists of interconnected sectors equipped with a drive for their radial movement, while adjacent side sections overhnosti sectors performed angled. 1 10872