SU1299658A1 - Bending die - Google Patents

Abstract

A punch for bending products with stiffeners from a long sheet material refers to the processing of metals by pressure and provides quality improvement due to the constant orientation of the workpiece along the axis during the manufacture of the product. Providing the die with a cut-off matrix installed next to the bending die, and an adjustable emphasis on the punch, as well as the implementation of the centering mechanism bar with the cutting edge on the trapezoidal groove end, ensures the alignment of the orientation function and the piece of the workpiece. After the starting material is fed into niTaMii, the bending punch moves and produces orientation of the tape with the bars of the centering mechanism, a piece of the workpiece with a cutting edge on a plate installed on the supply side, and bending of the workpiece in the bending die. In the opposite direction of the forming punch, stiffeners are formed. 5 il. ND X CO Oi SP 00

Description

The invention relates to the processing of metals by pressure, in particular to combined itamps, and can be used on universal bending machines driven by a central gear for the manufacture of parts from coiled material, for example, bending and molding stiffeners in parts with small shelves.

. The aim of the invention is to improve the quality due to the constant orientation of the workpiece on the axis during the manufacture of the product.

FIG. 1 schematically shows a stamp; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. one; in fig. 5 is a cross-section of the FIG. one.

The stamp contains a bending matrix 1 mounted on the faceplate 2 of a multi-slide automatic machine driven by a central gear, a bending punch 3 fixed on the slide of the automaton, a forming punch 4 fixed on the bottom end and exchanged in the guide from the bending die 1. Bending punch 3 has a thickness greater than the width of the workpiece and is installed in the guide shoes 5. On the side surfaces of the bending punch 3 along the axis of its movement a centering unit is mounted, made in the form of slats 6 with trapezoidal grooves 7 (Fig. 2) on the lower end surface loaded with springs 8. The size of the smaller base of the trapezoid groove 7 of the slats 6 is equal to the smallest allowable width of the tape or strip. In the upper part of the bending punch 3 there is an emphasis, made in the form of a slider 9, in contact with the screw 10, and a spring-loaded otlipa 11. The flexible matrix 1 is installed in the shoe 12, on which the matrix 13 and the limiter 14 are located, adjustable by screws 15. The limiter 14 is made in the form of a rectangular bar installed between the shoes 5 and 12 and cooperates with the screw 15. The stamp is provided with a pusher 16. The dispenser 11 is loaded with a spring 17.

In the initial position, the bending punch coti 3 is in the upper part of the dies, the molding part is in the lower part, the lower end of the centering bars b is at the material feed level or at the upper plane of the cutting matrix 13. The slider 9 from the upper end of the right bar 6 is set at a distance of This is equal to the stroke of the movement of the bending punch 3 until it touches the material and is sufficient for the centering bars 6 to orient the strip or tape relative to the axis of symmetry of the bars 6 during this turn.

The limiter 14 is set by the screw 15 so that when cut

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the workpiece from the material being processed did not move in the horizontal direction, and the gap between the end of the cut workpiece ensured the specified accuracy of the finished product during the subsequent bending. The technological gap between the cutting edges of the cutting matrix 13 and the right centering bar 6, which is the cutting knife, is established by the micrometer screw 15. Before starting the stamping operation, it is necessary to check the alignment of the axis of the forming punch 4 with the axes of the centering bars 6.

The stamp works as follows.

The material being processed by the feed mechanism is fed to the step along the cutting matrix 13 to the bending position. The material passes into the grooves of the strips 7. When the bending punch 3 moves downwards, the otlipatel, reaching the material, stops the spring 17. molding punch 4. Upon further movement of the punch 3, the springs 8 are compressed, and then the stop slider 9 finds the right centering strip 6 on the upper end of the right section 6. Then cut off the blank from the tape by the right centering bar 6. Next, cut off the blank located in the slots 7 of the strips 6, the punch 3 is pressed against the matrix 1, the workpiece is bending. In this case, the grooves 7 of the strips 6 with their sides interact with the bevels of the matrix 1. At the end of the process, the workpiece is flexible, bent and centered, leaves the grooves of the 7 centering bars 6, remaining clamped between bending punches and the die. Next, the forming punch is moved up and the stiffener is molded. After that, the bending and forming punches are returned to their original position, and the strips 6 and the detachment 11 under the action of the springs 8 and 17, respectively, occupy their original position. Ejector 16 removes the finished part from the surface of the die 1, and the cycle repeats.

The use of a stamp allows to obtain high-precision parts due to the centering of the workpiece relative to the working tool constantly during all stamping operations, regardless of the tolerance variation on the width of the material being processed throughout its length and crescent, allowing the material width to be equal to provides savings of metal. The combination of the orientation function and the cutting knife of one of the slats of the centering unit provides for expansion of the technological capabilities of the stamp. In addition, the use of centering bars alternately in

the quality of cutting knives greatly simplifies the design and adjustment of the stamp, reduces the time for regrinding the tool.

Claims (1)

Invention Formula A punch for bending products with stiffeners from a long sheet material containing a bending punch and die fixed respectively on the slider and plate, a forming punch placed in the bending matrix with axial displacement, and a centering unit for the workpieces, characterized in that product quality by ensuring the orientation of the workpiece along the axis in R the product manufacturing process, it is equipped with a cutting matrix located on a plate next to the bending matrix on the material supply side and an adjustable stop placed on the bending punch on the material supply side, and the centering unit is made in the form of two spring-mounted pliers on the sides of the bending punch direction perpendicular to the feed direction of the slats with trapezoidal centering grooves on the ends facing the die, while one of the slats is installed with the ability to interact with uliruemym abutment and is provided with a cutting edge at the bottom of the trapezoidal groove parallelepiped. Shnoy plane of the mirror: 1a matrix. fff 6 ± 6 four fig.Z FIG A FIG. five