SU576903A3 - Die set for finished blanks - Google Patents

Description

(54) STAMP FOR CLEAR CUT

restricting the movement of the clamp, FIG. 4 shows an elastic element fixed on a plate; in FIG. 5 - elastic element fixed on the bottom plate.

The stamp comprises a lower plate 1, on which a punch 2 and a clamp 3, and an upper plate 4 on which the matrix 5 is fixed, and an ejector 6 located in the die cavity. The clamp 7 is connected with an elastic element 8, such as a spring or rubber, mounted on the bottom plate 9 of the press.

The elastic element is enclosed in the cage 10, inside the elastic element passes the rod IL Usht created by the elastic element, adjusts with the help of the nut 12, its upper and lower ends abut respectively the upper and lower disks 13 and 14. Between the elastic element and the rod are located 15 and 15 bottom 16 sleeves. The forces of the elastic element are transmitted through the pressure screws 17 and the pressure disk 18 to the rods 7.

The pusher 6 is connected by means of the pressure screws 19 with the elastic element 20 mounted on the slider 21 of the press. The elastic element 20 is enclosed in the housing 22, and is supported on the disks 23 and 24, respectively, from above and below. The housing 22 is connected to the slider 21 through the plate 25. The threaded holes 26 are filled into the housing of the die in the housing.

A wedge 27 is positioned between the presser 3 and the bottom plate 1 of the stamp, and the wedges 29 are located between the presser and the ends of the pushers 28 facing them. The wedge 27 is under the influence of a lever 30 interacting with a flat spring 31. The pushers 28 interact through the rods 32 and the pressure plate 33 with elastic element 20.

The stamp works as follows.

Slider 21 presses, tap off, nepeMeujtT down the top movable part of the stamp. The puller 6 contacts the material to be processed 34 and presses against the presser 3. As a result, the elastic elements 8 and 20 are actuated. With a further lowering of the slide, the part is cut. During the cutting process, the springs have an ever-increasing effect on the clamp 3, in connection with which the forces of all-round compression acting on the material increase. At the same time, the ejector 6 compresses the spring 20 with the help of pressure screws 19, as a result of which the pushers 28 and the rods 32 move upwards. At the same time, a gap is formed between the pushers 28 and the clamp 6, the size of which is 0.5 mm larger than the thickness of the material to be treated. In this gap, under the action of the adjustable spring 31, the slider 29 enters. The presser 3 lowers and squeezes the adjustable wedge 27. The control lever (not shown in the drawing) presses the spring 31 against the lever 30, returning it to the lower initial position corresponding to the maximum gap between the pushers 28 and clamp 6. Enters

spring 31 into position with the help of a power disconnecting device.

When moving the presser 6 down, it squeezes out a wedge 27. The control lever (not shown in the drawing) presses the spring 31, presses it against the lever 30 and returns the lever 30 to the lower position in the cutting process that corresponds to the largest gap between the pusher 28 and the presser 3. ejector 6 sits on the upper plate 4, and the punch 2 can be embedded in the matrix 5 to a depth of 0.5 mm, which allows for the final cutting of parts from different thickness blanks.

When the press ram 21 is raised, the upper side of the die presses. With it, the presser 3 is pressed until the element ynpjToro of element 8 stops on the rods 7. Then the upper part of the stamp moves further upwards. However, the pusher 8 does not push the cut-out part out of the window of the matrix 5 until a gap is formed between the clamp 3 and the pusher 28 corresponding to the thickness of the workpiece plus 0.5 mm. Then, the forces collapse on the slider 29, the subsequent upward movement occurs without any hindrance, and the ejector 6 removes the part from the opening of the mat 5.

Claims (3)

1.Stamp for 1-STAGE punching of parts from sheet material on a press of simple action, containing a die and an ejector mounted on one part, driven by an elastic element, as well as a punch mounted on another part and clamped relative to the punch along the direction of movement of the other by element, characterized in that, in order to enable the cutting of parts from billets of different thickness without retooling, it is equipped with a mechanism for controlling the amount of movement when Yesha, and the clamp is installed on the lower part of the stalta. 2. A stamp according to claim 1, characterized in that the mechanism for controlling the amount of movement of the pressing element comprises at least one pusher mounted on the movable part of the stamp with the possibility of movement along, the direction of its movement and with the possibility of interaction with the elastic element located in this part, also contains moving in mutually opposite directions and moving along planes parallel to each other and perpendicular to the direction of movement of the punch, planes placed between the front and the pusher and a spring-loaded spring fixed on the fixed part, and a wedge located between the fixed part and the clamp, interacting with the last inclined face and moving in the direction of the punch under the action of the end AHyiijieieio of the lever pivotally mounted on the fixed part of the stamp and interacting with the other end with the flat spring. 3. DliaMii on PP. 1 and 2, characterized in that. that rubber is used as an elastic element. Sources of information taken into account in the examination; 1. Copyright certificate №240656, cl. B 21 D 45/00, B 21D 28/14, 1972. FIG. g jr P 27 & fts.3