SU1814577A3 - Joint action press tool - Google Patents

Description

The invention relates to the processing of metals by pressure and can be used, in particular, in the production of steel stamped baths for the manufacture of an outlet.

The purpose of the invention is to improve the quality of parts by calibrating the flanged section and eliminating a sharp edge on it.

Figure 1 shows the proposed stamp at the initial stage of the stamping process; figure 2 - the same, in an intermediate position (the operations of preliminary hole punching, flanging and cutting of the hole edges are performed); in Fig.Z - the same, after the completion of the process of calibration and straightening.

The combined stamp consists of an upper plate 1 with a punch holder 2 attached to it, on which a punch 3 is installed for preliminary punching of a hole and a punch 4 for obtaining the final hole, a punch 5 for flanging, a clamp-remover 6, a matrix 7 for flanging with a matrix mounted in it 8 to obtain the final hole and a clamping washer 9. Dies are installed on the bottom plate 10. Springs 11 are installed between the punch 5 and the punch holder 2, and springs 12 are installed between the punch holder 2 by the clamp 6, which help to hold the workpiece 13 during the stamping process.

The stamp works as follows.

When lowering the upper part of the stamp, the clamp-remover 6 presses the workpiece 13 against the matrix 7 (Fig. 1).

Punch 3 acts on the workpiece 13 and punches “on the fly a technological hole with a diameter d. To reduce the force required for punching, the cutting edge of the punch 3 is made with a serrated end surface. With the further stroke of the punch holder 2, the springs 1? act on the punch 5, while the flanging process takes place. Then the punch 3 cuts the edges of the technological hole (Fig. 2), thus obtaining a hole corresponding to the hole for the drain (diameter D). Moving further, the punch 5, overcoming the forces of the springs 12, calibrates the sides along the radii r and R (Fig. 3), as well as straightens the horizontal section, thereby eliminating the formation of sharp edges. In this case, a slight stretch (within the tolerance) of the drain hole occurs, which, in turn, facilitates the removal of the finished product during the return stroke. ,

In the reverse stroke, the removal of the product from the punch 4 is carried out simultaneously by the punch 5 and the clamp-remover 6.

The positive effect of the present invention can be achieved by improving the quality of the outlet and increasing the grade of the baths.

Claims (2)

Claim 1. A stamp of combined action, containing in the upper part punches for preliminary punching and for obtaining the final hole, rigidly connected with this part, a punch for flanging and a clamp-remover, and also containing in the lower part of the matrix for obtaining the final hole and flanging, characterized in that that, in order to improve the quality of parts by calibrating the flanged section and eliminating a sharp edge on it, the punch for flanging is made covering the punch to obtain the final hole, is installed with the possibility of relative movement along a common axis and simultaneous interaction with the upper part and the matrix in the lower position stamp, and its working end in the initial position is located below the working end of the punch to obtain the final hole. 2. A stamp according to claim 1, characterized in that the punch for preliminary punching is made with a toothed end surface.