RU1801677C - Stamp for punching diametrically opposed holes in tubular billets - Google Patents

Abstract

Usage: in the processing of metals by pressure, in particular for punching holes in pipe blanks. SUMMARY OF THE INVENTION: in a stamp with radially movable punches 7, the mechanism for moving the punches is a rod 3 with a conical end and a longitudinal groove and passes through the groove of the finger 4. When moving the rod 3, the punches 7 move in radial directions. The straps 5 are fixed on the rod and they guide the punches 7. They interact with the punches 7 of the matrix 14. The punches 7 return the elastic elements 9 to their initial position. When the rod 3 is retracted, the elastic elements 9 are expanded and act on the punches through fingers 6. The fingers 6 are fixed in the guide bars 5, pass through the grooves in the punches 7 and move them in the direction of the axis of the rod 3. 7 ill. SB with

Description

The invention relates to tooling for metal forming, in particular for punching holes (grooves) in pipe blanks, for example, in a tower tower WB 53x320M.

The aim of the invention is the expansion of technological capabilities by punching holes in any area remote from the end of the workpiece, and reducing metal consumption ..: - -.

In FIG. 1 shows a General view of the stamp at the beginning of the operation: figure 2 - section aa in figure 1; in Fig.3 - node I in Fig.2; in Fig.4 is a view along arrow B in Fig.Z: in Fig.5 is a General view of the stamp at the end of the operation; in Fig.6 - node II in Fig.5; Fig.7 is a view along arrow B in Fig.6.

The stamp for punching diametrically opposite holes in the tube blanks comprises a holder 1 for accommodating the blank 2, a rod 3 with a conical end on which a longitudinal groove is made with the possibility of moving finger 4 along it. The finger 4 passes through the rod 3 and the guide bars 5 into the holes The last two fingers are rigidly mounted 6 connecting each of the punches 7 with the guide bars 5 and passing through the groove in the corresponding punch 7. The grooves made in each punch 7 are located symmetrically with respect to si rod 3 and perpendicular to the groove 3. The groove rod under finger 6 washer 8 is inserted, at which the second set upruSO

about

(VI

VI

the elastic element 9, through which the punch 7 is returned to its original position. The elastic elements 9 are installed with the possibility of interaction with the fingers 6 passing through the grooves of the punches 7.

In order to be able to install the washer 8 and the elastic element 9, a lower hole is made in the punch 7, into which the plug 10 is inserted and fixed with a screw 11. To give reliability and rigidity to the connection of the guide plates 5 with the fingers 4 and b, the latter are fixed by means of the washer 12 and cotter pin 13, perpendicular to the direction of insertion of the workpiece 2, aligned with the punch 7 in the cage 1, windows are made in which the matrixes 14 are inserted having radial grooves.

To achieve alignment between the die 14 and the punch 7, as well as to fix the punch 7 firmly during the punching of holes in the guide strips 5, special bolts 15 are provided. Moreover, special bolts 15 are screwed into the threaded hole of the sleeve T and secured with a lock nut 16 with a washer 17. For for the convenience of the die, there are nuts 18 at the ends of the bolts 15 that are cotter-pin, and with which, if necessary, the punch 7 can be shifted.

For the possibility of entering the matrices 14 into the clip 1, in the latter, on the inner don-. A removable ring 19 is provided for the part of the cavity (surface D) used to extend the rod 3, which is fastened to the yoke 1 by bolts 20.

The stamp works as follows.

The tube stock is inserted into the yoke 1 to the limit stop (surface D). The shaft 3 (forward stroke) moves in the longitudinal direction coaxially to the yoke 1. The punches 7 move in the radial direction (the elastic elements 9 are in a compressed position) and diametrically opposed holes (grooves) are simultaneously pierced.

During the reverse movement of the rod 3, the elastic elements 9 expand, and the punches 7 occupy their original initial position as follows. how fingers 6 are fixed

with guide bars 5 and fixed.

Thus, it is possible to punch the required number of diametrically opposite holes (grooves) at any

areas remote from the end of the pipe billet.

Claims (1)

SUMMARY OF THE INVENTION A stamp for punching diametrically opposed holes in tube blanks, comprising a blank for holding a blank, a matrix with radial grooves, punches mounted for radial movement, a working mechanism for moving punches, including a rod with a conical end, means for returning punches to the initial position, including elastic elements, guides for moving the punches, with the exception of the fact that, in order to expand technological capabilities due to punching holes in areas remote from the end of the workpiece and reducing metal consumption, a longitudinal groove is made on the conical end of the rod, guides for moving punches are made in the form of strips placed on the conical end of the rod and connected with it by a finger passing through movable groove along it, in each punch a groove is made, the grooves are located symmetrically relative to the axis of the rod and perpendicular to the groove of the rod, the means for returning the punches to their original position are made in the form fingers connecting each of the punches to the guide strips and passing through the groove in the corresponding punch, and the elastic elements are mounted to interact with the fingers passing through the grooves of the punches. .3 FIG. 5 / 7 Fa b /. 7