SU1199355A1 - Die for making u-shaped bent parts from sheet bar - Google Patents

Description

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The invention relates to the processing of metals by pressure, in particular for the performance of bending operations from sheet blanks, and can be used in mechanical engineering, instrument making, etc.

The aim of the invention is to reduce the cost of products by eliminating the machining of their surfaces.

Figure 1 shows a stamp; figure 2 - the same plan; in fig. 3 is a section A-A in FIG. in (1IG.4 - the scheme of formation of the part shelf as a result of molding with partial flexible and subsequent rolling of the shelf; in Fig. 5 - section BB in Fig. 2; Fig. 6 - the arrangement of inductors for heating the workpiece; 7 is a section B-B in Fig. 6; Fig. 8 is a view of D in Fig. 5; Fig. 9 shows the moment when the billet is removed from the punch by the ejector when the gate shifts to its initial position.

The stamp comprises a base 1, on which in the guides 2, under the magazine 3, mounted on the plate-4, a moving reciprocating, translational drive gate 5 is mounted.

The lower bending tool 6 is installed in the groove of the body of the gate 5 and is attached to the latter with screws. In the guides 2, symmetrically to the lower bending tool 6, the support bars 7 are rigidly fixed with protrusions for the part at the initial moment of bending.

The plunger 8, hinged in the housing of the gate 5, informs the latter of a reciprocating motion using, for example, a hydraulic cylinder.

The inductors 9, which heat the workpiece, are attached to the current leads of the generator IO by means of a strip 11 and a lining 12 containing streams for the current leads 13, with screws 14

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and 15. Through the current leads 13 and the hoses 16, the cooling inductors are supplied and discharged.

Rollers 17 mounted on axles x 18

5 of the guides 2 pressed into the casing 19, which is installed in the groove of the guides 2 and fastened to the latter with screws 20, and the position of the casing 19 relative to the lower bending tool 6 is set with the help of set screws 21, while the working surfaces of the rollers I7 are parallel to the working surfaces lower bending tool 6. In the groove of the plate 4 on the axis 22 is installed resetter 23.

The stamp works as follows. The hydraulic cylinder with the help of the plunger 8 moves the body of the gate 5 and the lower bending tool 6 secured in it. During its movement, the gate returns the workpiece from the magazine 3, while the workpiece lies on the plane of the lower bending tool biting the slot of the bar 7. With respect to the axis of the stamp, the workpiece installed protrusions slats 7. When moving the workpiece enters the gap between the inductors 9,

30 where their ends are heated to the desired temperature, and then, with further movement of the workpiece, they are fed to the rollers 17. When the workpiece is pushed through the rollers 17,

35 forming the blank section at the edge of the punch and bending the free end of the blank, the second and third pair of rollers, produce the final deformation of the part shelves. In the end

 the stroke of the gate, the ejector 23, turning on the axis 22, enters the slot of the gate body beyond the end of the workpiece and, when the gate returns to its initial position, removes the workpiece from

5 of the lower bending tool 6, after which the gate is retracted to grip the next blank.

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Claims (2)

Durandin M.M. Stamps for cold stamping of small parts. Album of designs and schemes. I .: Mechanical engineering, 1978, p.12, Fig. 1.11. . (54) (57) 1. STAMP FOR MANUFACTURING CURVED PARTS OF A U-SHAPED SHAPE FROM SHEET Billets, containing the upper and lower bending tools, as well as a magazine located on the upper plate, and a drive gate located in the guides on the base, which differs the fact that, in order to reduce the cost of products by eliminating the mechanical treatment of their surfaces, it is equipped with support strips to support the ends of the workpiece, placed on the base under the store symmetrically to the direction of supply of the workpieces, and inductors for heating of the workpiece located between the support strips and the upper bending tool, the lower bending tool is made in the form of a block fixed in the through slot of the gate made on its upper surface, and the upper bending tool is in the form of three pairs of forming rollers mounted on the guide rails symmetrically both sides of the feed axis of the workpieces and made with working surfaces parallel to the working surfaces of the lower bending tool. 2. The stamp according to claim 1, about t l and the fact that it is equipped with a ejector, made in the form of a cantilever plate, pivotally mounted on the plate.