SU980910A1 - Semiautomatic die for producing wire tabs - Google Patents

Description

The invention relates to the processing of metals by pressure and can be used in the manufacture of parts from wire.

Known stamp containing mounted on the base of the holder with a lid, two semi-matrix, cutting knife, wedge drive semi-matrix and the wire feeder 1.

The disadvantages of this stamp are the impossibility of obtaining a thickening in the middle part of the workpiece, low reliability, as well as a small number of sizes of the products obtained.

The purpose of the invention is to increase the sizes of products and increase the reliability of the stamp.

The goal is achieved by the fact that the semi-automatic punching machine, containing a base with a cover mounted on the base, two semi-matrices, a cutting knife, semi-matrix wedge drive and a wire feed mechanism, is equipped with the closing of the channel with a diameter corresponding to the diameter of the treated

the wire, and the drive is made in the form of two wedges, each of which is installed between the side wall of the semi-matrix and the oboyg, while in the matrices there is a groove perpendicular to their plane of connection, and the cutting knife is installed in the groove with the possibility of interaction with one of the wedges drive semi matrices.

ten

The inserts are made with catchers with wedge bevels with a flat platform at the apex corresponding to the diameter of the wire to be processed.

15

The stamp is equipped with two otplipatel, each of which is installed in the corresponding semi-matrix, is spring-loaded relative to it and in contact with the wedge of the semi-matrix, while

20 on the wedge of the semi-matrix drive, vertical grooves for the heads of the otpliteli are filled.

Claims (3)

FIG. 1 shows a vertical section along the axis of the stamp; in fig. 225 lower part of the stamp, top view; in fig. 3 is the same, the cross section A-A in FIG. 2; in fig. 4 — wire fixing unit — cross-section BB in FIG. 2; in fig. 5 —30 cross section section B – B in FIG. 2 along the line of positioning the pushers; in fig. b, 7 and 8 - section G-D in FIG. 2 along the wedge and, respectively, at the moment when the semi-matrix touches the moment the wedge touches the knife, in the lower position of the wedge; in fig. 9 is a drawing of the product obtained, where d is the diameter of the grooves, D is the diameter of the molded head, 1 is the length of one end, h is the total length of the petal; in fig. 10. Diagram of the stamp operation, where a is the initial position of the half-matrix and the inserts are divorced (the workpiece is fed into the stamp all the way to the safety device), b is the matrix floor and the inserts are flattened and clamped the ends of the workpiece; c - the knife is moved into the groove of the semi-matrix and cuts the billet; the d- inserts move within the semi-matrix; the free portion of the preform is reformed into a shoulder of large diameter; in fig. 11 - on inserts with catchers in an expanded form. A semi-automatic stamp contains a clip 1, a clip 2 clips, two semi-matrices 3 and 4, OTpesHofi tsog 5, base b, two inserts 7 and 8, y:; installed inside the semi-matrix and having semi-cylindrical grooves in wire diameter, three wedges 9, 10 and 11, two pushers 12 and 13, a guide tube 14, springs 15 and 16, a safety device 17 and a wire feed mechanism (conventionally not shown). The work of the stamp is carried out as follows. The semi-automatic stamp is installed on a mechanical press of small capacity (- 5 tons). When the stamp is opened, the press ram moves upward, the bevels 18 of the wedges come out of contact with the half-matrices 3 and 4 and the bars 7 and 8, the latter are consumed by pruhdan, release the working area of the stamp, the feed mechanism is activated, and the wire is fed to the required value . At the same time, the front end of the wire, in case of its deflection in the vertical plane, abuts against the catcher 17 and returns to the vertical axis of the working axis. When the press slider moves down, wedges 9 and 10 bring together semi-matrices 3 and 4, the latter bring together inserts 7 and 8, which center the front end of the wire in a horizontal plane with their 3-edged projections 19 in a horizontal plane. clamping the left and right ends of the workpiece, leaving a gap of wire required for the landing of the rim to be free. With further movement of the wedges down, knife 5 starts to move and cuts off a section of wire sandwiched between the semi-matrices. At the same time, the wedge 11 drives inserts 7 and 8, which, moving to the right along the die axis, force the free part of the wire to be reshaped into a rim with plastic diameter by plastic deformation. Throughout the entire travel path, the Wedges 9 and 10 pushers 12 and 13 move in static position, as in the wedge x 9 and 10 are made grooves for the passage of the pusher heads. When the press ram moves upward, the semi-matrix 3 and 4 disperse, and if a petal sticks to one of them, then, resting its molded head on the pusher 12 and 13, is removed from the semi-matrix and falls down into the failed punch window. The dimensions of the products are determined by the size 1 from the inner plane of the groove in semi-matrixes to the slot under the knife (the length of one end of the product to the shoulder) and the depth of channel 1, in the catcher (the length of the second end of the product to the shoulder). The conversion from one size of product to another is to change inserts or semi-matrices. For the manufacture of petals with a collar at the end (1 0) in rltamp, instead of two inserts 7 and 8, one insert is installed, the width is equal to the sum of the sizes of inserts 7 and 8 without a catcher and protrusions. In the case of a change in the length of both ends of the petal, the semi-matrices 3 and 4 and inserts 7 and 8 are replaced. The semi-matrices differ in the position of the slot under the knife, the inserts in the size of the bevels in the catcher and, accordingly, the size of the 3-sided protrusions. Due to the same overall dimensions, the construction of semi-matrixes and inserts allows them to be made in batches without further metalworking. . The semi-automatic stamping machine of the proposed design allows to increase the size of the products and increase the reliability of operation compared to the prototype. Claim 1. A semi-automatic punch for making wire petals, comprising a semi-matrix mounted on the base with a lid, two semi-matrices, a cutting knife, semi-matrix wedge drive and a wire feeding mechanism, characterized in that in order to increase the sizes of products and to increase the reliability of the stamp , - it is equipped with two interchangeable inserts installed inside the semi-matrix, spring-loaded between themselves and having semi-cylindrical grooves, which, when closed, form a channel with a diameter corresponding to the diameter the wire is wired, and the wedge drive is made in the form of two wedges, each of which is installed between the side walls of the semi-matrices and the yoke, while in the semi-matrices there is a groove perpendicular to their plane of connection, and the cutting knife wedges. drive semi-matrix. 2, the semi-automatic punching machine according to claim 1, characterized in that, on the purpose of providing accurate fixation of the wire along the working axis of the punch, inserts are made with catchers having wedge bevels with a flat surface. with a pin at the top, corresponding to: the diameter of the wire to be treated. 3. The semi-automatic stamp according to claim 1, characterized in that the floor ;. matrices are equipped with two otlipatel M.-, each of which is installed in the corresponding semi-matrix, is spring-loaded relative to it and comes into contact with the semi-matrix drive wedge, with vertical grooves under the heads of the otplicants made on the semi-matrix drives. Sources of information taken into account in the examination 1, USSR author's certificate W 405640, class B 21 J 5/08, 1973 (prototype). W W2j / I-a noeepHijinu ng.d ff SjJD / epHLjmo 1 / 2.7 /// t 7 dj L L ir 5 dg .Л7 FIG. eleven