SU1323181A1 - Die for reducing round billets - Google Patents

Abstract

The invention relates to the field of metal forming and can be used to crimp tubular blanks. The purpose of the invention is to expand the technological capabilities of the crimp process by increasing the limiting degrees of deformation and improving the quality of crimped parts. The stamp consists of a punch (P) 1 with an annular protrusion 2 having a conical inner surface, a clip made in the form of a collet 4, a die (M) 6, a support 7, a spring 5 and an ejector 8. M 6 and the clip 3 form a screw pair. At the working stroke P 1 of the conical cavity of the annular height. Tupa 2 runs onto the conical nosepxHoctb of the collet 4, forcing it to clamp the workpiece 9 and Push it into M 6. Simultaneously, P 1 moves the holder 3 downwards, which ensures rotation of M 6 relative to the workpiece 9 and clips 3 and the imposition on the deformation zone of tangential stresses that contribute to the improvement of the structure of the metal. 3 il. S (L 00

Description

I

The invention relates to equipment for metal forming and can be used for crimping tubular blanks.

The purpose of the invention is to increase the limiting degree of deformation, expanding technological capabilities and improving the quality of crimped products.

FIG. 1 shows the proposed stamp, section; in fig. 2 - time aa in figure 1; in fig. 3 shows a section BB in FIG. 2

The stamp comprises a punch 1, provided with an annular protrusion 2 with a conical inner surface, which is made in the form of a cylindrical part 3 and a collet 4 with an outer conical surface. The yoke 3 rests on the spring 5 and forms a screw pair with the die 6, which is mounted on the support 7. An ejector 8 is provided to remove the finished products from the die 6.

The proposed stamp works as follows.

The workpiece 9 is installed in the hole of the yoke 3. When working stroke, the punch 1 of the conical cavity of the protrusion 2 hits the conical surface of the collet 4, which clamps the workpiece 9. A further movement of the punch 1 downward pushes the workpiece 9 into the die 6 and the vertical movement of the yoke 3. Both 3 by means of a threaded connection, forces the die 6 to rotate relative to the workpiece 9. This compresses the spring 5. At the end of the deformation, the punch 1 of displacement 323 1812

It returns to its initial position, clearing the holder 3, which under the action of the spring 5 rises to its previous level. With this, 4 is unclamped, 5 releasing the crimped part, which is extracted from the matrix 6 with the ejector 8.

Compared to the known, the proposed stamp allows you to compress the workpieces with a degree of deformation up to 85%, reduce the technological effort by 10% and get quality products by creating an equiaxial structure and twisting 15 metal fibers by applying tangential stresses to the deformation zone when the matrix is rotated regarding the workpiece.

Claims (1)

Moformula invention A stamp for crimping billet containing coaxially mounted punch mounted with the possibility of moving in the axial direction of the yoke and the matrix, characterized in that, in order to expand technological capabilities by increasing the limiting 30 degrees of deformation and quality of the product; the holder is made in the form of a collet with a central hole for the workpiece and with a conical outer surface; at the end of the punch facing the collet, a step with an inner conical surface interacting with the cone of the collet is made, and the die is pivotally mounted and connected to the yoke 40 by means of a threaded connection. Fig5 Editor L. Pchelinska Compiled by I. Kapitonov Tehred A. KravchukKorrektor. Cherni Order 2898/10 Circulation 732 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. D. 4/5 . “B ..-. - - -. - - .- - - - Production and printing company, Uzhgorod, st. Project, 4