SU984575A1 - Die for blanking parts of strip and band blanks - Google Patents

Description

one

The invention relates to the cold working of metals by pressure and may be used to cut parts from strip and strip blanks.

A well-known stamp for cutting parts from strip and band blanks, comprising a solder and a matrix on which a puller is mounted and a double-arm lever pivotally mounted, which is turned under pressure from a spring in the direction opposite to the material feed direction.

The puller is connected to the matrix with the possibility of a relative vertical shift and is provided with springs lowering it onto the spring-loaded end of the two-armed lever 1.

However, the well-known stamp is characterized by insufficient reliability of operation.

The closest to the proposed by the combination of essential features and the effect achieved is a chip for cutting out parts from strip and band blanks, containing a matrix fixed on a fixed bottom plate and removing, a nick, mounted on a movable top plate and a punch

a lever that rotates in a vertical plane in the direction of feeding the blanks from the top plate through the transducer unit 2 fixed on it.

However, a known stamp is characterized by insufficiently high reliability of operation and accuracy of supply.

. The purpose of the invention is to increase the reliability of work and accuracy of the feed.

The goal is achieved by the fact that in the die for cutting parts from strips and strip blanks, containing a matrix and a puller mounted on a fixed bottom plate and a puller mounted on a movable top plate a punch and an axis carrying the feed lever, rotated 15 in a vertical plane in the direction of feeding the blanks from the top plate through a transforming mechanism fixed on it, the transforming mechanism is made in the form of a slider carrying a spring ring interacting with the top plate

20 stops, located above the top plate, the pusher and the lever, and the feeding lever is made two shoulders and installed with the possibility of interaction with the upper end of the slider.

FIG. 1 shows a stamp for cutting out parts from strip band blanks, the initial position; in fig. 2 - the same at the time of cutting.

The stamp contains the bottom plate 1, on which the matrices 2 and the puller 3 are installed, forming together with the matrix a groove “a for passing material 4 (strips or ribbons), an upper plate 5 with a cavity“ b.

On the top plate 5, with the help of a punch 6, punches 7 are fixed and with the help of axis 8 a lever 9 located in the cavity “b. Guides 10 are mounted in the top plate 5, in which a pusher 11 is mounted cooperating with the lever 9, and a right-handed rod 12 is fixed along which the slider 13 moves, carrying the spring ring 14. In the puller 3 there is an opening for the passage of the slider 13.

The slider 13 has a cylindrical shape.

At the end of the rod 12 using the axis 15 is fixed L-shaped double-arm lever 16. In the slider 13 is installed spring-loaded pusher 18 with a spring 17 and the protrusion 19 (stop) is made. The upper end of the two shoulders lever 16 is located between the protrusion 19 and the pusher 18. The position 20 denotes the parts, and the position 21 denotes the stop.

The stamp works as follows.

The material 4 is fed to the double-arm lever 16. After cutting the parts 20 out of the material 4 by the punches 7, the material 4 moves in the feed direction and turns the double-arm lever 16 around the axis 15, and then moves in the opposite direction. The end of the two shoulders lever 16 enters the punched hole and material 4 is pressed by a jumper between the holes and at the end of the two shoulders lever 16. Punches 7 cut down parts 20. Then, with further movement of the plate 5 down, the slider 13 abuts the bottom end of the material 4 and moves up relative to the plate 5. The protrusion 19 acts on the upper end of the two shoulders lever 16, rotates it around the axis 15 at an angle o. The other end of the two shoulders lever 16 moves the material 4 to the feed clamp t. The ring 14 at the expense of the forces of friction keeps the romper 13 in the upper position. With

Further upward movement of the plate 5, the pusher 11 interacts with the stop 21, moves down, interacts with the lever 9 and turns it around the axis 8. The lever 9 moves the slider 13 down. The pusher 18 acts on the upper end of the two shoulders of the lever 16, rotates it around the axis 15 and returns to its original position. Then the cycle is repeated.

The effect of using the proposed chip is to increase the reliability of operation and the accuracy of the feed.

Claims (2)

1. USSR author's certificate No. 471927, cl. B 21 D 28/14, B 21 D 43/02, 1974. 2. Forward number 3280891 / 25-27, cl. B 21 D 28/14, B 21 D 43/02, 1981.