RU21752U1 - SEQUENTIAL STAMP FOR SIMULTANEOUS STAMPING OF TWO PARTS - Google Patents

Abstract

1. A stamp of sequential action for the simultaneous stamping of two parts, containing guide assemblies mounted on a fixed and movable plate in the form of columns and bushings, die holders and punches with matrices and punches fixed in them for punching, bending and cutting, characterized in that the stamp has additional guide unit made in the form of columns fixed in the punch holder and corresponding holes for them located in the matrix for separation operations and matrix holder ele.2. A stamp according to claim 1, characterized in that the punched punches for obtaining elongated holes are made with chamfers. 3. The stamp according to claim 1, characterized in that the bending punches and dies for bending are located with the bending line perpendicular to the feed direction of the tape and are made up of fixed and movable parts, the last of which are clamps-pullers.

Description

SEQUENTIAL STAMP FOR SIMULTANEOUS STAMPING OF TWO PARTS

The utility model relates to tooling for sheet strains, in particular, to stamps of sequential action for the simultaneous stamping of two parts.

A sequential action stamp is known for producing parts with holes having a cylindrical and conical (chamfer) part (for example, see M. M. Durandin, N. P. Rymzin, N. A. Shokhov. Stamps for cold stamping of small parts. Design album Moscow, Mashinostroenie, 1978, p.67, Fig. 4.09) The stamp contains pockets and dies, respectively, for punching a cylindrical hole and shaping the core part at various positions. The disadvantages of this stamp are: the complexity of its design, the high cost of materials and its manufacture, as well as the low accuracy of the hole sizes due to an error in the feed of the tape.

The closest design of the same purpose to the claimed utility model in terms of recognition of 1 rv is a sequential-action stamp adopted for the prototype for simultaneous stamping of two parts (M.M. Durandin, N.P. Rymzin, N.A. Shokhov. Stamps for cold stamping small Album of constructions and schemes, Moscow, Engineering, 1978, p.38, Fig. 2.26), containing guide assemblies in the form of columns and bushings mounted on a fixed and movable plate, punch holders and matrix holders

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at 21 D 37/00

With punches and dies fixed in them for punching holes, bending and cutting.

The specified stamp design has the following disadvantages:

- the guiding device of the stamp, made according to a widespread pattern in the form of columns and bushings fixed in the movable and fixed plates of the stamp, when performing separation operations does not provide high alignment of the dies and punches, the uniformity of the gap between them along the contour of punching and cutting, which are necessary to obtain high quality parts: high precision, clean cut surface, no burrs. In addition, for the same reason, punches and dies have low resistance, especially when stamping parts from materials of high hardness;

- the direction of the bending lines (at the bending positions) coincides with the direction of the ribbon fiber, which makes it impossible to obtain high-quality parts with small bending radii - without gaps and cracks on the outer surface at the bending places.

The technical result of the utility model is to improve the quality of manufactured parts, the durability of punches and dies and reduction; stamp manufacturing costs.

To achieve this technical result, a sequential action stamp is proposed for simultaneous stamping of two parts, containing guide assemblies mounted on a fixed and movable plate in the form of columns and bushings, die holders and punches with matrices and punches fixed therein for punching holes, and cutting. The feature of the proposed stamp is that the stamp has an additional guide assembly made in the form of columns fixed in a punch holder and corresponding holes for them located in the matrix for separation operations and the matrix holder.

In addition, punches for punching elongated holes are made with chamfers.

Bending punches and dies are located with the bending line perpendicular to the feed direction of the tape and are made up of fixed and moving parts, the latter of them simultaneously serve as clamps-pullers.

In this case, the stationary punches and inserts of the matrices for bending are made in the form of narrow plates of constant cross section and have anti-spin.

Figure 1 shows sketches of stamped parts; figure 2 - diagram of their sequential stamping; in Fig.3 - the lower part of the stamp (top view); figure 4 is a section aa in fig.Z; figure 5 is a section bB in figure 4; Fig.6 is a section bb In Fig.Z; Fig.7 is a section GG in Fig.Z; on Fig section DD in Fig.Z.

The sequential action stamp contains the lower 1 and upper 2 plates with guide columns 3 and bushings fixed in them 4. A gasket 5 and a pylon holder 6 are attached to the upper plate 2 with additional guide columns 7 and punches installed in it: for punching hole 8 , curly cuts 9, 10, 11, 12 and obtaining elongated holes 13 made with chamfers; movable punches 14 and 15, supported by a non-working surface on the gasket 16, which interacts with the gasket 5 and the buffer 17, stationary punches 18 and 19, made in the form

THIN plates of constant cross section for preliminary and final

are flexible; cutting punch 20; clamps-pullers 21 and 22, interacting with the springs 23 and the buffer 24. To the bottom plate 1 is attached a matrix 25 with placed in it inserts 26, 27 and 28 for curly cuts and segments, respectively, fixed inserts 29, 30 for preliminary and final bending, clamping puller 31, operating from springs 32.

The stamp works as follows.

The tape material is fed all the way to the matrix 25. At the first transition, with the punches 9 and 10, two grooves are cut, forming the protrusions b for the step feed, and the oval hole is punched with the punch 8 and the matrix 25. At the second transition, two curly grooves are cut with the punches 11, 12 and inserts of matrices 26, 27, which form part of the contours of the right and left parts. The third transition involves punching two elongated holes with the formation of conical chamfers using punches 13 and the die 25. At the fourth transition, the movable punches 14, the fixed punches 18, 29 and the pressure puller 31 are pre-bent, and at the fifth transition, the final bending is performed using the movable punches 15, fixed punches 19, 30 and clip-puller 31. At the sixth transition, the figured contour is cut out and the parts are separated from each other and the tape using the punch 20 and matrix 28.

The use of an additional guide assembly in the form of columns fixed in a punch holder and, accordingly, holes for them located in a matrix for separation operations and

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matrix holder; punch punches with faocks; punches and dies for bending, located with the bending line perpendicular to the direction of feed of the tape and made in the form of narrow plates of constant cross section with counterclamps made in accordance with the utility model, provides high-quality parts with a clean cutting surface without cracking at small bending radii and high durability of the working parts of the stamp - punches and dies.

Claims (3)

1. A stamp of sequential action for the simultaneous stamping of two parts, containing guide assemblies mounted on a fixed and movable plate in the form of columns and bushings, die holders and punches with matrices and punches fixed in them for punching, bending and cutting, characterized in that the stamp has additional guide unit made in the form of columns fixed in the punch holder and corresponding holes for them located in the matrix for separation operations and matrix holder barely.  2. A stamp according to claim 1, characterized in that the punched punches for obtaining elongated holes are made with chamfers. 3. The stamp according to claim 1, characterized in that the bending punches and dies for bending are located with the bending line perpendicular to the feed direction of the tape and are made up of fixed and moving parts, the last of which are clamps-pullers.