SU1274814A2 - Female die cutoff unit of multistage die set - Google Patents

Abstract

The invention relates to a tooling for cold sheet punching and can be used in sequential punching of curved parts for automating the removal of waste from the tape. The matrix node contains a matrix with working windows and guide bars attached to the matrix and having each lead portion and a main part formed by projections. The working planes of the main parts of the guides are located at a distance corresponding to the length of the parts produced. The width of the windows of the matrix for cutting waste in the direction perpendicular to the feed direction of the tape is equal to or greater than the distance between the working planes of the lead-in and main parts of the corresponding guide. The expansion of the matrix windows and the corresponding increase in the width of the punches not only ensures the length of the jumpers, but also the cutting of waste. 3 il. cl

Description

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The invention relates to the processing of metals by pressure, in particular to the equipment for sheet metal forming, and is an improvement of the device according to the author. St. No. 1030069.

The purpose of the invention is to provide automation of waste disposal and stamp design improvement by simultaneously removing the web and cutting the side waste.

FIG. 1 shows a matrix node, a general view; in fig. 2 - bottom part of the stamp, top view; in fig. 3 shows section A-A in FIG. 2

The stamp including the proposed matrix node comprises a matrix 1, guide bars 2 and 3 fixedly mounted on the matrix 1, and a puller 4 mounted above the guide bars. These elements form a guide channel for the passage of the belt from which the parts are cut. The matrix I is fixed on the bottom plate 5. The top plate 6 movably mates with the bottom plate 5 by means of columns 7 and sleeves 8 and comprises a punch holder 9 with a set of penetrative punch 10, forming 11 and 12 and cutting 13 and 14 punches. The lower shaping punches 15 and 16 are secured in the holder 17 and guided into the holes of the plate 5 and the die 1. The guides and the rulers 2 and 3 have projections 18 and 19 with centering planes for precisely centering the belt 20 along the part 21 cut from tapes.

The centering planes of the protrusions 18 and 19 of the guide lines 2 and 3 are aligned with the cutting edges 22 and 23 of the cutting punches 13 and 14. The dimensions ai and ag of matrix windows corresponding to the punches 13 and 14 in the direction perpendicular to the feed direction of the tape 20, each not less than the distance between the working planes of the corresponding guide in its lead-in and main parts. At the same time, each of the dimensions ai or a must be greater than the corresponding width of the cut waste 24 or 25, i.e. the windows of the matrix 1 protrude beyond the dimensions of the width of the tape. This is achieved constructively due to the mutual arrangement of the guide planes 26 and 27 and the centering planes of the projections 18 and 19 of the guide bars 2 and 3, as well as the windows of the matrix 1 with the corresponding cutting punches 13 and 14. The window size ai is larger than the size bi between the working the guiding planes of the ruler 3, and the size of the window a2 is larger than the size b between the guiding working planes of the ruler 2. In the feed direction of the tape 20, the size of the window ti and the corresponding size of the cutting punches 13 and 14 are larger than the web 28. and 26 and 27 of the guide bars 2 and 3 form a lead-in portion for the preliminary guiding of the tape.

The stamp works as follows.

The belt 20 is fed by a feed mechanism (not shown) in the direction indicated by the arrow into the stamping step. The punching punch 10 cuts the cutting of the part connected in the belt 20 by technological jumpers 28. The forming punch 11, 12, 15 and 16 are used to sequentially form the part 21 without separating it from the tape. At the last positions of the technological cycle, the parts 21 are cut from the tape 20 by cutting punches 13 and 14. At the same time, the punches 13 and 14 on the matrix 1 simultaneously cut off the web 28 and chop the waste tape. The waste is removed, and the parts 2 are compressed by the control unit on the camshaft of the machine (not shown) and supplied through fitting 29 through the channel system in the die 1 and the guide bar 2, are dropped into the trap 30.

The proposed matrix assembly allows automation of the manufacturing process for parts such as pin jacks by freeing up an area for removing parts. In addition, the problem of separating parts from waste without complicating the design of the stamp has been solved. There is no need to use a waste winding unit or an additional die unit to cut waste, since the cutting operation is combined with the operation of separating the part from the jumpers.

Claims (1)

Invention Formula The matrix node segments multijunction stamp on the author. St. N ° 1030069, characterized in that, in order to automate the removal of waste and simplify the punch design, the distance between the grooves of the edges of each cutting matrix parallel to the working planes of the guides is equal to or greater than the distance between the working planes of the corresponding guide in its entry and main parts x. A-h fig.Z