SU1349842A1 - Compound die for making (from a band) parts having one angle of bending - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to tooling for the manufacture of bent products. The aim of the invention is to ensure the accuracy of the dimensions of the parts. The stamp contains a bending die fixed to the bottom plate (k) with a curvilinear working surface. When a cut piece is deformed, its bendable side slides along a curvilinear working surface K, the shape of which is calculated from the condition of constant length of the centerline. The workpiece support using K eliminates the workpiece from slipping out from under the punch and ensures the accuracy of the sides of the resulting part. 3 il. from 00 4:

Description

The invention relates to the processing of metals by pressure, in particular to tooling for the manufacture of bent products.

The purpose of the invention is to ensure the accuracy of the dimensions of parts.

Figure 1 shows the strain, a general view; figure 2 is a view of And figure 1; on fig.Z - section bb in figure 2.

The stamp contains the lower Llit 1, the plate 2 and the bending die 3 installed on it and the cutting matrix 4. A spring-loaded ejector 5 is installed between the dies. The stamp also contains the upper plate 6, the gasket 7 and the punch 9 with the bending 10 and cutting 11 installed in the holder 8. edges and a ledge 12 on the side surface having a height equal to the thickness of the workpiece 13. On the top plate 6 with screws 14 on the springs 15 and knees 16 there is an emphasis in the form of a block G 7 with a curvilinear working surface 18 on the bending edge 19 matrix 3. Form and the working surface 18 is calculated from the condition of constant length of the average workpiece during bending. A spring-loaded clamp 20 is also mounted on the top plate 6,

The stamp works as follows.

During the working stroke of the press, the block 17 is lowered onto the mirror of the matrix 3, the tape 21 is fed to the surface 18 of the block 17. The clamp 20 presses the tape against the cutting matrix 4, and the punch 9 cuts the workpiece 13 with a bending edge 11 and bends it with a bending edge O along a bending chrome

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In this case, the preform 13 remains clamped between the side surface of the cutting matrix 4 and the curvilinear working surface 18 of the pad 17 during the whole bending process, which guarantees the constant length of its sides. At the end of the bending end of the blank 13, moving along the surface 18, enters the ustut 12 on the punch 9.

During the return stroke, the ejector 5 pushes the part out of the matrix 3, which is collided into the container.

The use of the proposed machine allows to ensure exact dimensions of the part.

Claims (1)

Invention Formula Combined die for getting from the tape parts with one bend angle, containing a bending matrix and a punch, a tape clamp attached to the top plate, and the ejector, as well as the support for the workpiece, characterized in that, in order to improve the accuracy of the parts, the bending matrix is fixed on the bottom plate, the stop is provided in the form of interlocking with the matrix and fixed on the top plate on the elastic base of the block with a curvilinear working surface 5 on the side of the bending edge of the die, and on the side surface of the punch there is a stop step to interact with the end of the blank and the side of the workpiece. 1 Back one .Z e-s yes .№ Fig.z Compiled by V. Grigorieva Editor N. Tupitsa Tehred M. Khodanych Proofreader M. Maksimishinets Order 5215 / 7. Circulation 731 Subscription VNSHSHI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4