SU465252A1 - Sequence stamp for separation operations - Google Patents

Description

one

The invention relates to a tooling for cold plate forming and can be used in mechanical engineering.

A sequential stamp for separating operations is known, comprising a lower fixed plate, a floor, a die and taper clamps, an upper movable plate, carrying punches and a puller interacting with the surfaces of the taper holes with the conical clamps.

However, in the well-known stamp between the puller and the mirror of the matrix, a gap within 0.5-1 mm must be maintained for normal operation of the lock, therefore the puller presses the material against the mirror of the matrix, which degrades the quality of the parts produced.

In order to improve the quality of parts in the proposed die, the puller is made of a composite height in at least two parts, spring-loaded and displaced one relative to another by the action of spring-loaded pushers relative to the top plate, which are additionally installed in the top part of the puller, in which conical holes are also made.

FIG. 1 shows the proposed stamp, longitudinal section; in fig. 2 - the same cross section.

The stamp contains the lower fixed

plate 1 (see Fig. 1) and the upper movable

plate 2. These plates are interconnected

by means of columns 3 and sleeves 4, between which are placed the ball guides

5. A matrix block is placed on the bottom plate.

6, on the top plate - a block of punches 7. The top plate is connected with a press ram

(not shown). On the mirror of the matrix block 6

rigidly fixed conical locks 8 (see Fig. 2) through the sleeve 9 and the screw 10. The upper part And the puller is located along the block of dies 6. In the corresponding places of the upper part 11 of the puller are

rigidly connected sleeves 12 with conical holes that are prevented from being contaminated by tightly fitting plates 13. The upper part 11 of the puller is connected to the base plate 2 of the shtamp using springs 14 and screws 15, which are adjusted to a specific height and stopper with the help of nuts 16. For the direction of punches of small diameter, the puller may have sleeves 17, which (see Fig. 1) protrude beyond the flat part of the upper part of the puller.

The lower part 18 of the puller, located along the upper part 11, serves to press the material to be stamped to the mirror of the block of matrices 6 at the moment of cutting and removing waste

punches 19, and then from catchers 20. In

in the free state, the lower part 18 of the puller is pressed against the upper part with springs 21 and screws 22. In the movable part of the punch there are pushers 23 spring loaded 24. The number of pushers 23 is selected constructively depending on the pressing force. The spring force is adjusted by means of screw plugs 25.

In order for the safety device 20, spring loaded with spring 26, adjustable stopper 27, to be able to freely fix the strip before cutting, the pusher 23 in the upper position of the movable plate 2 is located at a predetermined distance a equal to 3-4 mm from the plane of the lower part 18 of the puller. The slats 28 serve to guide the strip or tape 29 along the feed.

The stamp works as follows.

Metal strip or tape 29 enters the stamp. In the opened position of the stamp, the head of the screw connecting the puller with the movable part lies on the shoulders of the movable plate, and the pusher 23 is located a distance from the plane of the lower part 18 of the puller. When the movable plate 2 is lowered under the action of the slider, the upper part of the puller with sleeves 12 with conical holes and conical locks 8 fixed to the block of dies is precisely fixed to the mirror of the matrix. The gap between the matrix mirror and the puller becomes S + 0.5-1 mm, where 5 is the thickness of the material. The catchers 20 exit the puller and fix the strip along technological openings. The lower part of the puller is pressed to the top by means of springs 21, and the supporting ends of the pushers 23 do not reach the plane of the lower part 18 of the puller and allow catchers 20 to fix the strip freely. Upon further lowering of the plate, when the springs 24 come into action, the pushers 23, overcoming the action of weak springs 21, press the lower part 18 of the puller to the strip lying on the mirror of the matrix. The punches go down below the puller and punch holes in the material. During the return stroke of the slide under the action of the pushers 23 working from rigid springs 24, the lower part 18 of the puller removes the workpiece from the punches 19 and, lifting, presses against the upper part 11 of the puller, which under the action of the springs 14 continues to lie on the conical locks 8, and the strip associated with catchers 20 is raised above the array mirror. With

Further up the slide, the puller is released from the connection with the latches 8 and under the action of the springs 14 removes the strip from the catchers 20, and the screw head 15 rests on the shoulders of the movable plate 2 and occupies the original position.

Subject invention

A successive stamp for separation operations comprising a lower fixed plate, a matrix carrier and conical clamps, an upper movable plate, carrier punches and a puller, which interact with conical holes with conical locks, characterized in that, to improve the quality of the parts, the puller is made composite in height in at least two parts

spring-loaded and moving one relative to another under the action of spring-loaded relative to the top plate of the pushers, additionally installed in the upper part of the puller, which also has tapered holes.