SU1015965A1 - Die for bending braces from rod blank - Google Patents

Abstract

STAMP FOR BENDING A STRAWBREAD FROM A BARGE BLOCK, containing a fit on a fixed plate with the possibility of oncoming traffic and amps, punches having end pieces with working strands and interacting with copier surfaces of the stop, as well as a bending mandrel, characterized in that the chain of increasing the quality of products by compensating for springback; the end points of the punches are installed with the possibility of rotation around axes parallel to the axis of the bending mandrel on the side of the mandrel facing the end 4acTsiM punches; drilling, and the stop is installed with the possibility of adjusting the movement in the direction, perpendicular to the axis of the mandrel. W С Q1 with О5 СП

Description

The invention relates to the processing of metals by pressure, in particular to the core for cold forming.

The well known for flexible parts such as staples made from bar stock, containing a vertical back, a henna plate with a matrix fixed on it, a punch with a handle, and a 1 SHB plate. The punch is made detachable from two parts, one of which is movable, and the stream is made with a depth equal to half a meter diameter in the plane of the connector on the surface of the punch, and the stamp is provided with an elastic fixing element and a wedge connected to the movable part of the punch C1.

However, this stamp is intended only for final bending of the workpiece, the ends of which are pre-bent.

N. The most 6rai3KHi-v to the proposed one is a stamp made by flexible bar clips, which are mounted on a fixed frame with counter-displacement punches, having end pieces with workers, and interacting with wedge stop surfaces; as well as bending mandrel C 2 3.

The shortcut of the punch is that it does not provide the required quality of the cramped parts of the confusion due to the different angles of the springs & material of the workpieces, depending on the brand of the material. In order to eliminate this defect, it is necessary to introduce an additional editing operation, at which the detail is brought to. drawing sizes.

The purpose of the invention is to improve the quality of parts by compensating them with a spring and.

i The goal is achieved by the fact that in the stamp for bending braces from bar stock, containing punches mounted on a fixed plate with the possibility of oncoming movement, having end pieces with working strands and interacting with boar surfaces of the stop, and also a bending mandrel, The end parts of the poona nos. are installed with the possibility of mutual rotation of the first axis of the axes parallel to the axis of the bending mandrel on the side of the mandrel facing the end parts of the punches the undercut is made and the stop is installed with by adjusting the displacement in the direction perpendicular to the axis of the correction.

FIG. 1 shows the proposed stamp, a general view; in fig. 2 - a part of the stamp is a top view; in fig. 3 is a section A-A in FIG. 2; in fig. 4 - the position of the rear and side punches after cutting the workpiece to a predetermined length; in fig. 5 is flexible U-shaped workpiece rear punch and mandrel} in FIG. 6 - flexible. Ends of the U-shaped billet side punches; in fig. 7 —the bending of the ends of the workpiece by the swiveling end portions of the side punches at an angle compensating for the springback of the material of the preform; in fig. 8 we get the item.

A punch for bending parts such as staples from bar stock includes an upper plate 1 with rear wedges 2 fixed on it, and lateral 3 placed on windows 4 and 5, respectively, anego 6 and lateral 7 punches mounted on the lower plate 8 n o The end parts are 9 side punches 7 working streams 10, with a depth of 0.7 - 0.8 of the diameter of the workpiece.

The end parts 9 with working streams 10 of each lateral punch 7 are made removable and mounted on x 11, normal to the base 12 of the shtamp, and the stamp is equipped with a stop 1 installed on the bottom plate 8 with copy surfaces 14 contacting with pivoting end parts 9 side punches 7,

The stop 13 has a screw 15 with which it is possible to adjust the angle of rotation of the parts 9 of the side punches 7 to compensate for the elastic deformation (springing) of the workpiece material.

The stamp also has a cut-off matrix 16 for re; a buckle of wire 17 and an adjustable stop 18, providing a gap b at the junction of the ends of the resulting doetail 19.

A mandrel 20 with a flange 21, a stop screw 22 and a spring 23 is fastened to the upper plate 1. The mandrel 20 is guided by the walls of the opening of the puller 24 and has an undercut 25.

The stamp works as follows.

When the press slider together with the upper plate 1, wedges 2 and 3 are secured in the up-position, the wire 17 is fed into the cutting matrix 16 to the adjustable stop 18.

When the press ram is down, the mandrel 2O moves in the puller 24 and stops when its flange 21 contacts the puller 24. At the same time, the rear wedge 2 touches the rear punch 6 and begins to move it. The rear punch 6 cuts off the zagzugovka, bends it 5 into a U-shape on the mandrel 20 and stops its perp (Mv etschenie. After that, the lateral wedges 3 begin to pf & place the lateral punches 7, end

portions of which reach t to the wide surfaces 14 of the abutment 13, slide along. They are turned on axis x 11 and the final crush of the ends of the part 19 is made on the mandrel 20, taking into account the required angle of the spring.

Thus, the proposed stamp allows to obtain parts in final form, without editing.

FIG. four

20

go

ten

 /

7

Claims (1)

2. Mescherin V. G. Sheet stamping. Atlas of schemes. M., Engineering, 1975, p. 96, fig. 236 (prototype). 54) (57) STAMP FOR FLEXIBLE BRACKETS FROM BAR BAR, containing punches mounted on a fixed plate with the possibility of oncoming movement, having end parts with working streams and interacting with the counter surfaces of the stop, as well as a bending mandrel, characterized in that, with In order to improve the quality of products by compensating for their springing, the end frequencies of the punches are mounted to rotate around axes parallel to the axis of the bending mandrel, on the side of the mandrel facing the end parts of the punches, dimming, and the emphasis is installed with the possibility of adjusting movement in the direction perpendicular to the axis of the mandrel.