SU958026A1 - Blank for producing cone shells - Google Patents

Description

(5) PREPARATION FOR THE MANUFACTURE OF CONIC SHUTTERS

one

The invention relates to the processing of metals by pressure, in particular to methods of forging shells.

The known billet for receiving shells by the method of lump rolling on the mandrel, made in the form of a ring with cylindrical outer and inner surfaces 1.

However, this billet has a low manufacturability in production, since it is impossible to obtain shell from it in the form of a truncated cone with constant wall thickness.

Closest to the proposed technical essence and the achieved positive effect is a blank for the manufacture of conical shells with a hollow cylindrical inner surface t2.

Such a workpiece can be made by mechanical processing of cylindrical shells, which leads to an increase in consumption

metal and increased the complexity of the manufacture of conical shells.

The aim of the invention is to reduce the labor intensity of the production of shells and increase the utilization rate of the metal.

This goal is achieved by the fact that in the billet for the manufacture of conical shells with a hollow cylindrical inner surface, its outer surface is stepped in the form of concentric shells, which successively decrease the number of ledges in diameter from one end to another.

FIG. 1 is schematically depicted.

15 proposed preparation, general view; in fig. 2 is a diagram of rolling the blank in the initial position in FIG. 3 the same, intermediate position; in fig. - the same, the final position.

Claims (2)

Billet 1 is made on the outer surface in the form of a successive reduction in diameter from one end to the other of the conical ledges (Fig. 1). Rolling the preform 1 is carried out as follows. The workpiece 1 is installed on the rake 2, supported by the supports 3. Then, with a striking k, the workpiece is pressed with intermediate edges of the workpiece around the axis (Fig. 2). After rolling out the ledge with the largest outer diameter (Fig. Deformation covers a large | Part of the workpiece 5. At the end of the rolling a hollow forging 6 is obtained in the shape of a truncated cone. Example. To simulate the workpiece, studies are carried out in laboratory conditions on the C1 type rolled parts. I get the original billet with a ledge on the rim diameter with dimensions, mm: In chute research institutes, and meter. Larger outer diameter. Smaller outer diameter. Length of the cylindrical part of the larger diameter. Total length. After the rolling, the forging has the following dimensions, mm: Outer diameter At the small base 59 Outer diameter at the large base 118 6 Wall thickness it, 9 Forging length 20. striker along the axis of the workpiece. Special strikers with a turning suit and rigid bed presses are not required. Compared with the prototype, the use of the proposed workpiece reduces the laboriousness of the production of shells and increases the utilization rate of the metal. Claims of the Invention A blank for the manufacture of conical shells with a hollow cylindrical inner surface, characterized in that, in order to reduce the laboriousness of making shells and increase the utilization rate of the metal, its outer surface is stepped in the form of concentric steps decreasing in diameter from one end to the other. Sources of information, rintye taken into account during the examination 1. Ohrimenko I, M. Technologists forge for chnb-stamping production. M., Mechanical Engineering, 1976, p. 193198. 2. US Patent And, cl. 72-35, 07.27.73 (prototype). J FIG.  / / hr2 . J