RU103766U1 - HYDRA-STAMP FOR MANUFACTURE OF FLANGED BOTTOMS IN THE FORM OF LENS - Google Patents

Abstract

 1. A hydraulic stamp for the manufacture of flanged bottoms in the form of a lens, containing a punch and a matrix, characterized in that the punch is made in the form of mechanically untreated planes and assembled by welding the base plate, flange plate and four stops for orienting the matrix, which is installed with the possibility of vertical movement. ! 2. Hydraulic stamp according to claim 1, characterized in that it is made with openings located in the center for supplying and discharging water and supplying compressed air. ! 3. The hydraulic stamp according to claim 1 or 2, characterized in that it is equipped with a seal for sealing the cavity under the billet for supplying water under pressure, made in the form of a rubber cord installed in a mechanically untreated place. ! 4. Hydraulic stamp according to claim 1 or 2, characterized in that the matrix is made mechanically untreated in planes.

Description

This utility model relates to the processing of metals by pressure, in particular to sheet stamping, and can be used to obtain parts, such as bottoms.

From the existing level of technology there is known a device for manufacturing parts by flexible - molding, consisting of a rigid form block (punch) and an elastic, liquid or gas matrix (Isachenkov EI "Stamping with rubber and liquid", M .: Mashinostroenie, 1967, p. 36 -39).

The disadvantage of this technical solution is the complexity of the design of the device and, as a result, the high complexity and long lead times and implementation.

It is also known a device for stamping (RF No. 2089312, B21D 22/10, 1997), consisting of a rigid form block (punch), an elastic matrix and an elastic support (lining). The principle of operation of this technical solution is that in the process of shaping, pressure on the sheet blank located on the mold block is transmitted through an elastic matrix located in the container, an elastic support and a sub-stamp plate. A cavity is made in the lower part of the punch, the volume of which exceeds the volume of the elastic support, while the height of the elastic support is at least 3 times greater than the depth of the cavity.

The disadvantage of this technical solution is the complexity of the design, the high cost of the device, the long production time and, as a consequence, the inability to quickly develop new products.

Classical variants of liquid drawing are known (Mishcherin VT "Atlas of sheet stamping schemes (third edition)", Moscow: Mashinostroenie, 1975, p.176 fig. 573, 576, 578, p. 177 fig. 588), consisting of a matrix having the form of a part, a rubber seal, a clamp, a body or a punch.

The principle of operation of these technical solutions lies in the fact that the workpiece is placed under the clamp, pressed by the press to the body and under it, a liquid is supplied under pressure through a rubber plate. The blank takes the form of a matrix.

The disadvantage of the above technical solutions is that they are all laborious to implement, complex in design, and after drawing out the “lens”, another operation is necessary - flanging along the contour on a separate device.

At the same time, the execution of new orders on such devices lasts months, or even years; and with the proposed stamping method, the development of new products will be reduced and will be from one to two weeks.

The task to which the claimed utility model is directed is: creating a hydraulic stamp with high quality of manufactured parts; a significant reduction in the cost of the hydraulic stamp and the timing of its manufacture due to the simplicity of the design, which does not reduce, but on the main parameters, on the contrary, improves the quality of products. As a result, the manufactured products by the proposed method do not require further processing.

This problem is solved due to the fact that:

- an additional flanking operation is performed before the "lens" is "inflated", which in turn has a beneficial effect on the process of pulling the "lens";

- the elements of the hydraulic stamp have virtually no machining in planes, which does not reduce the quality of the products. Thus, the steel plate in the delivery state, after cutting, for example, at the installation of waterjet cutting along the contour, immediately goes to the stamp assembly, which is performed by welding. The only machining operation is filling the radii along the edges;

- the hydraulic stamp does not have a complicated and expensive rubber seal of the cavity into which the liquid is supplied under pressure; due to the original design of the hydraulic stamp, it is replaced by an ordinary rubber cord of circular cross section, the installation of which does not require machining of the hydraulic stamp;

- the proposed design of the hydraulic stamp does not have complex and expensive guide columns, the role of which is successfully performed by four stops welded to the base, which also do not have machining with chip removal.

The technical result provided by the above set of features is that, this method allows to produce bottoms of high quality, low cost in the shortest possible time.

The essence of the utility model is illustrated by the drawings, in which Fig. 1 shows the operation of loading the workpiece, in Fig. 2 - the operation of flanging the edge, in Fig. 3 - the operation of hydroforming the "lens", in Fig. 4 - the operation of removing the product from the hydraulic stamp, in Fig. 5 - operation trim the wallpaper, figure 6 - the finished product.

The hydraulic stamp consists of the lower part - the punch, which in turn consists of a base plate 2, a convex part of the flanking plate 3, four stops 4 correctly orienting the matrix 5 during lowering when flanging the edges of the workpiece 6, laid on the convex part of the flanging plate 3.

The hydraulic stamp is installed on table 1 of the hydraulic press concentrically to the holes for supplying and draining water, compressed air.

A number of hydraulic cylinders 7 of the hydroforming unit, for example 36 pieces, are located along the perimeter of the table 1 with the possibility of moving to the center of the matrix, which means that they can be installed along the edge of any curved or regular contour of the matrix hole.

The matrix 5, using hooks (not shown in the drawing) is attached to the heels of two opposite hydraulic cylinders, and has the ability to move vertically.

Base plate 2, flange plate 3, stops 4 are cut out of plate steel to reduce the cost of a stamp (for example, at a waterjet cutting machine) and are not machined along planes, assembled together for welding, which does not reduce the quality of stamped parts. The matrix is made in a similar way.

The hydraulic stamp works as follows. After loading the workpiece, the matrix is lowered and the hydraulic cylinders flange the bottom.

Water is pumped into the hole located in the center of the stamp with a high pressure pump, and the flat bottom begins to “swell” to the required height, forming a rigid “lens”.

The cord seal 8 prevents the escape of water from under the "lens", resulting in the possibility of increasing pressure.

To accelerate the process of draining water, compressed air is supplied to the hole located in the center of the stamp and water flows under pressure back into the tank.

After the “lens” is drawn out, all hydraulic cylinders together with the matrix rise up, the product, for example, a flanged oval-shaped bottom, is removed from the hydraulic stamp.

To give the bottom a finished look, the surrounding area is cut off, for example, by plasma cutting.

This method of manufacturing the bottoms, gives a high quality finished product, especially the quality of the surface of the lens.

A hydraulic stamp for the manufacture of flanged bottoms in the form of a lens is successfully used in JSC "Plant" Start "on the installation of hydroforming bottoms for the manufacture of bottoms.

Claims (4)

1. A hydraulic stamp for the manufacture of flanged bottoms in the form of a lens, containing a punch and a matrix, characterized in that the punch is made in the form of mechanically untreated planes and assembled by welding the base plate, flange plate and four stops for orienting the matrix, which is installed with the possibility of vertical movement. 2. The hydraulic stamp according to claim 1, characterized in that it is made with holes located in the center for supplying and discharging water and supplying compressed air. 3. The hydraulic stamp according to claim 1 or 2, characterized in that it is equipped with a seal for sealing the cavity under the billet for supplying water under pressure, made in the form of a rubber cord installed in a mechanically untreated place. 4. Hydraulic stamp according to claim 1 or 2, characterized in that the matrix is made mechanically untreated in planes.