SU537832A1 - Stamp for cutting plastic parts - Google Patents

Description

(54)

 FOR CUTTING DETAILS FROM PLASTIC MATERIALS

The invention relates to the field of machining, in particular, to devices for cutting parts from plastic materials and can be used in the radio industry for the manufacture of pass-through step insulators, for example, from fluoroplastic, which are widely used in assembling communication equipment.

A stamp for cutting parts from plastic materials is known, which includes a tubular punch mounted in a plate connected to the press slide 1. On this stamp it is possible to produce gaskets without a hole in the middle.

The closest known one is a stamp for cutting out parts from plastic materials, including a movable tubular punch with a sharp cutting edge for cutting external contour mounted on the base, mounted on the top plate, a hole punch for cutting holes and the bottom plate 2.

However, the known stamp cannot be used to obtain parts with a stepped outer surface.

The purpose of the invention is to provide the possibility of obtaining parts that are stepwise in shape.

This is achieved in that the stamp is provided with a fixed tubular matrix mounted on the bottom plate with a sharp cutting edge; located coaxially with the movable tubular punch, and an adjustable stop for limiting the motion of the movable tubular punch connected to the buffer mounted under the bottom plate and connected with it.

FIG. 1 shows the proposed strain section; in FIG. 2, node I in FIG. one; in fig. 3 is a diagram of the sequential interaction of the working bodies of the stamp (positions a, b, c, and d).

The stamp consists of a base 1, inside of which there is an air cylinder 2 with a traction rod 3. A rod 3 through an eyelet with a cross member 4, on the latter are mounted the columns 5, passed through the bushings of the bottom plate 6 of the housing 7. The plate 6 is embedded with tubular matrix 8 with sharp cutting by edges. The top plate 9 is fastened to the columns 5 and is vertically movable in the vertical direction together with the crosshead 4 under the influence of the rod 3 of the pneumatic cylinder 2. The tubular punches 10 with a sharp cutting edge are pressed into the upper plate 9 and arranged coaxially with the die 8 on the upper plate 9 a plate is mounted 11, whose position in the vertical direction is adjusted by means of screws 12. A plate 11 having a number of holes through which the hubs 13 of the pushers 14 pass so that their thickened part when moving the extractors 14 will be The abutment plate 11, Ejector 14 has a punch 15 for punching holes. The ejector 16 of the tubular matrix has a hole corresponding to the punch 15. On the bottom 6, there are free stops 17 in which there are adjustable stops 17 for limiting the stroke of the tubular punch, which are rigidly connected to the plate 18, pressed against the bottom plate by buffer 19, connected by means of the clamp 20 to the bottom plate 6. The stamp works as follows. The workpiece 21 in the form of a strip or sheet serves on the tenderloin. The number of simultaneously working dies and punches is chosen based on multiple structural dimensions of the part. In the initial position, the matrix 8 and the punch 10 are divorced to extreme positions and there is a workpiece 21 between them. When the drive is turned on, the rod 3 is lowered, that is, the traverse 4, column 5 and the upper plate 9 do not follow the material of the workpiece 21, and the punch 15 pro beats it through. Before being exposed to the resistance of the material, the ejector 14 is embedded inside the punch 10 until its thickened part is pressed into the plate 11 with its collar 11. Following the punch 15, the t5gpunch punch 10 cuts into the workpiece material 21 with the pointed part the height of the step 22 of the part, the upper plate 9 will come into contact with the adjustable stops 17 and, pressing them, will begin to lower the plate 18. In this case, the buffer 19 is compressed. As the plate 18 is lowered, and with it the ejector 16, the matrix 8 cuts into the workpiece 21 from below (see Fig. 3, position b). During embedding, the punch 10 enters into the die 8 with its lead-in part, and the part is separated from the workpiece 21. During the embedding process of the punch 10 and the mats. In Fig. 8, the material is deformed, o it mainly extends to that part of the workpiece 21, which is outside the formation of the part. Subsequently, it is discarded. If during the cutting process it is necessary to adjust the height of the part, this is achieved with screws 12 that move plate 11. In this case, the distance between the ends of the ejectors 14 and 16 changes as far as possible and the material of the workpiece if it is thicker details 22, is pressed by the force of compressed buffer 19; With the help of adjustable stops 17 and screws 12, the device can be adjusted from cutting out one size of the manufactured parts 22 by height, thus the thickness should change accordingly the material of the workpiece 21. In the same method, the depth of entry of the punch 1O inside the matrix 8 can be adjusted. Moreover, first 22 de comes out of the matrix 8, and then out of the punch 10. Removing parts 22 from the punch 15 is provided with a spring-loaded release device (not shown). Next, the cutting cycle is repeated. Using the opportunity to increase the number of dies and punches working simultaneously, one can achieve a significant increase in labor productivity. Formula of the invention Stamp for cutting out parts from plastic materials, including a movable tubular punch with a sharp cutting edge for cutting out the outer contour mounted on the base, mounted on the top plate, a hole punch for cutting through the hole, and the bottom plate, characterized in that details of the stepwise height of the form, the stamp is provided with a stationary tubular matrix located on the bottom plate with a sharp cutting edge coaxial with the movable tubular punch and adjustable pore limiting the course of the movable tubular punch, with a buffer installed under the bottom plate and associated with it. Sources of information taken into account in the examination: b6

1. V. M, Anikin and others. Reference. V.M. Anikin and others. Reference stamp design for cold stamps-die structure for cold stamping

Ki, M., 1960, p. 53, fig. 57.M., 1960, p. 53. fig. 58.

537832