SU733831A1 - Die for trimming fins - Google Patents

Description

(54) STAMP FOR TRIMMING

I

The invention relates to the field of metal cutting and can be used for trimming scrap.

A stamp is known for trimming the oblo with parts containing a snuff plate with a spring-loaded support moving along the vertical axis of the stamp, an upper plate with a punch mounted on it, and a cutting edge matrix along the contour of the workpiece mounted on the columns with the possibility of moving along vertical axis of the stamp {1. A disadvantage of the known stamp is the low quality of the parts produced.

The purpose of the invention is to improve the quality of the parts produced.

The goal is achieved by the fact that the proposed stamp is provided with an additional cutting element made in the form of an end milling cutter with a shank with a screw thread installed in a hole made in the punch with a corresponding screw thread and spring-loaded relative to the upper plate.

cutters with a shank with a screw thread, and the matrix is spring-loaded relative to the bottom plate.

FIG. 1 shows a stamp in the initial position, general view; in fig. 2 - the same at the time of the end of the working stroke.

The shtagl contains the upper 1 and lower 2 plates, the punch 3, the die 4, the cutting elements 5 and 6, made in the form of face mills with shanks with a screw thread, and a stand 7 of the lower plate.

The top 1 and bottom 2 plates are used to attach the stamp to the press. They are combined between themselves guide columns and bushings. Punch 3 is connected by bolts and pins with

15 with an upper plate I. An upper spring-loaded cutting element, a face milling cutter 5, is screwed into the punch 3. The die 4 is connected to the lower plate with 2 guide columns and is spring loaded so that

20 cut vertical oblo, then trimming along the contour.

To the bottom plate 2 bolts and pins fasten the rack 7, in which the bottom is screwed

373

spring-loaded cutting element - face milling 6.

In the opened position, the milling cutter 5 and 6 protrude from the punch 3 and the stand 7, respectively. At the moment of the working stroke of the punch, the top 5 and bottom 6 mills abut the ends of the part (in vertical break), receive rotational movement under the action of a press force greater than force of the spring, due to self-braking thread and cutting off the vertical burr, then the thread retracts into the slots, and the transverse circumferential trim along the contour of the part 8 is cut by the punch 3. When the spring punch is opened, the cutters return to their original position.

Claims (1)

Invention Formula A stamp for trimming oblo from parts, containing a plate with the NIZH1POY installed with it capable of moving along a vertical axis of the stamp a spring-loaded support, an upper plate with a punch mounted on it, and a matrix with a cutting edge along the contour of the workpiece mounted on columns with the possibility of moving along the vertical axis of the stamp, characterized in that, in order to improve the quality of the parts produced, it is equipped with an additional cutting element, made in the form of an end mill with a shank with a screw Coy installed in the opening formed in the punch with a corresponding screw-threaded and spring-loaded relative to the upper plate, wherein .opora also formed as a face mill with a screw-threaded shank, and spring-loaded relative to the lower die plate. Sources of information taken into account during the examination 1. USSR author's certificate N 520165, cl. B 21 J 5/02, 1975.