SU1484408A1 - Die for hydromechanical drawing - Google Patents

Abstract

The invention relates to the field of metals by pressure and can be used in various fields of engineering in the manufacture of parts with a flange of sheet blanks. The purpose of the invention is the expansion of technological capabilities by obtaining parts with different flange shapes. In the process of stamping, the upper part 3 of the clamp closes with its lower part 4. A cavity is formed that corresponds in shape to the flange of the finished part. When the hollow piston 15 moves downward, the fluid is expelled from the annular cavity 7 along inclined channels 9 into the cylindrical cavity 8 of the matrix 6. The fluid pressure increases, due to which a flange 17 is formed in the pressure cavity. 1 Cpf, 2 of them.

Description

The invention relates to the field of metal forming and can be used in various fields of mechanical engineering in the manufacture of parts with a flange of sheet blanks.

The purpose of the invention is the expansion of technological capabilities by obtaining parts with different flange shapes.

FIG. 1 shows the stamp in the opened form in the initial position; in fig. 2 - the same, in closed form in the process of stamping.

The stamp consists of a punch 1, a movable plate 2 in which a composite clamp is fixed, containing the upper 3 and lower 4 parts, interconnected by a rod 5. The matrix 6 has an annular cavity 7 located on its mirror and a cylindrical cavity 8 that serves deforming the part, these cavities are interconnected by inclined channels 9 and filled with liquid 10. In the annular cavity 7 of the matrix 6, a split rib (not shown) is installed to cut the waste and facilitate its removal. The depth of the annular cavity 7 is calculated on several layers of waste. In the lower part of the matrix 6, two holes 11 are made, connecting the cylindrical cavity 8 to the reservoir with a liquid-network through a kl35 system

Panov (not shown). Concentric to the punch 1, a hydraulic cylinder 12 is installed, the casing of which through the buffer 13 interacts with the movable plate 2. In the casing of the hydraulic cylinder 12, an opening 14 is formed for communication with the hydraulic station for high pressure fluid supply. Inside the hydraulic cylinder 12 there is a hollow piston 15, which interacts with the hydraulic cylinder body with 45 spring springs 16. A billet 17 is placed on the mirror of the matrix 6, which is then deformed in the cylindrical cavity 8 of the matrix 6.

The stamp works as follows. The workpiece 17 is placed on the mirror of the matrix 6 filled with working fluid through the holes 11. When moving down the movable plate 2, the hydraulic cylinder 12 moves down to the stop into the matrix 6. In this case, the movable plate 2 compresses the buffer 13 until the upper part 3 of the clamp is closed. with the lower part 4 clamp and not

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ensure sufficient pressing of the workpiece to the mirror of matrix 6. When the upper 3 and lower 4 parts of the clamp are closed, a cavity is formed that corresponds in shape to the flange profile (for example, in the form of a torus). After that, the punch 1, advancing the workpiece 17 into the cylindrical cavity 8 of the matrix 6, produces an extract of the part. A part of the fluid displaced from the cylindrical cavity 8 into the annular cavity 7 along inclined channels 9 performs end support to the peripheral part of the flange of the workpiece, which intensifies the process of drawing a part. After the flat-flange workpiece 17 is pulled out, the punch stops and lowers the hollow piston 15 down by the action of a high-pressure fluid entering the hydraulic cylinder 12 through an opening

14 in the housing of the hydraulic cylinder 12 from a separate hydraulic station. Hollow piston

15 enters the annular cavity 7 located on the mirror of the matrix, cuts off the peripheral uneven part of the flange of the obtained part and further movement in the cavity 7 displaces the liquid from it into the working cylindrical cavity 8 of the matrix 6 along inclined channels 9. In the cylindrical cavity 8 the pressure of the liquid rises acting on the flange of the part

and forms it in the form of a torus in the cavity of the clamp. Upon completion of the punching in the hydraulic cylinder 12, the fluid pressure is released and the hollow piston 15 is returned to its initial position by the action of the springs 16. After that, the movable plate 2 with the hydraulic cylinder 12 and the upper part 3 of the clamp and the punch 1 simultaneously rises. The lower part of the presser 4 remains on the mirror of the die until the upper part of the rods 5 reaches the stop in the presser 3, after which the lower part 4 of the presser rises. When the lower part 4 of the presser is raised to a height sufficient to place the next workpiece, the movable plate 2 stops and the punch 1 continues to move upwards, while the part 17 is removed from the punch and removed.

In the stamp you can get parts with a different flange profile, for example square or triangular. For this purpose, the pressing cavity is made with an appropriate contour. Using

Claims (2)

Claim 1. A stamp for hydromechanical drawing, containing a punch, a matrix with a cylindrical cavity filled with liquid, a clamp installed concentrically to the punch, and a device for supporting the part in a flange made in the form of an annular cavity concentric with the cavity and communicating with it through inclined channels, characterized in that, in order to expand technological capabilities by obtaining parts with a different flange shape, the stamp is equipped with an additional ^5th unit to support the part in the flange, made in the form of hydrocylin core, the hollow piston of which is installed with the possibility of entering into the annular jq cavity of the matrix, while the clamp is installed in the cavity of the said piston. 2. Stamp pop. 1, characterized in that the clamp is made of two parts interconnected by rods, and when they are closed, a cavity is formed, corresponding in shape to the profile of the flange. Figure 1