RU1771848C - Die for hole flanging - Google Patents

Abstract

Usage: processing pre-punched holes in the sheet material. Essence: the presence in the die of the sleeve 4 with an anti-friction washer 5, spring 12, rocker 11, pins and corresponding holes 8 and grooves 7. provides a given complex mutual movement of the working elements of the die with a simple rectilinear movement of the punch holder. In this case, the flanging is carried out by the punch 2 with an additional supply of material to the flanging zone from the periphery of the hole by the pressing punch 3. Zil.

Description

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The invention relates to the processing of metals by pressure, to the processing of the internal circuit with a pre-punched hole.

There is a known method of forming parts with a flange, which describes a device in which a pressure ring squeezes the material to the center, and a flanging punch forms a board of increased height. The device cannot be used on a mechanical press. The goal is to enable the use of the stamp in single-action presses, including manual ones.

This is achieved by the fact that in the flanging stamp for holes containing a matrix, a punch holder, a flanging punch fixed therein, a pressure punch covering a flanging punch, there is a sleeve, an anti-friction washer, a spring, a rocker and pins, and a flanging punch is perpendicular to its longitudinal axis a through diametrical hole expanding to the periphery of the hole, in the side walls of the pressure punch near its end facing the punch holder, there are through radial diametrically arranged bayonet grooves, while the sleeve covers the pressure punch, the antifriction washer is installed on its end facing the matrix mirror, two through radial diametrically located screw grooves are made in the central part of the side walls of the sleeve, in the side walls of the sleeve near its end facing the punch holder and located with a gap relative to it, two through radially diametrically arranged openings of rectangular cross section are made. A spring is placed between the punch holder and the end face of the pressure punch facing the punch holder. and covers the flanging punch, with one end of the spring facing the punch holder and its end part secured to the punch holder, and the other end resting on the end of the pressure punch and its end part secured in the sleeve, the beam located in said through radial holes of the punches and sleeve with the ability to interact with the walls of these holes, and the pins are fixed in the Central part of the pressure punch with the possibility of their interaction with the helical grooves covering its sleeve flax axis pins arranged perpendicular to the longitudinal axis of the punch.

In FIG. 1 shows the device in operation (at the moment of touching the material two

punches), general view; in FIG. 2 is a section AA in FIG. 1; in FIG. 3 is a section BB in FIG. 2; in FIG. 4 is a section bb in FIG. 2; in FIG. 5 is a section GG in FIG. 2; in FIG. 6 - side

5 is a projection of FIG. 2; in FIG. 7 is a schematic diagram of an arrangement of forming parts at the end of a first phase; in FIG. 8 - the same, at the end of molding.

The stamp contains a matrix 1 (Fig. 1), a flange punch 2 firmly fixed in the punch holder, mounted on the vertical punch 3 with the possibility of vertical movement (Fig. 2), on which it can also be moved along

On the vertical axis axis 5, a sleeve 4 sits, at the lower end of which an anti-friction washer is fixed 5. The pins b, pressed into the punch 3, with their outer ends enter the screw grooves 7 located on the sleeve 4.

0 Through the window 8 of the sleeve 4, the bayonet groove 9 of the punch 3 and the fan-shaped hole 10 of the punch 2, the beam 11 passes. The spring 12 is fixed at one end in the punch holder, the other in the sleeve 4.

5 mounted on the punch 2.

 The stamp works as follows. In the initial position, the punch 2 and the sleeve 4 are protruded in front of the punch 3 and, when the slide moves downward, the first to touch the workpiece material. The punch 2 begins flanging (according to a pre-punched hole) and bends the bead at a certain angle, creating conditions for the flow of metal, and the sleeve 4 is rotated on the workpiece material 5 around its axis under the pressure of the pins b located in the screw groove 7. Antifriction washer 5 reduces friction resistance.

Turning around its axis, the sleeve

0 4 t there is no rocker arm 11, the ends of which are in the windows 8, the middle part rotates in the fan-shaped hole 10 of the punch 2, and the intermediate part slides in the bayonet groove 9 of the pressure punch 5 by 3. After contact with the material of the punch 3 the process continues the same parameters, but into the forming board, the punch 3 displaces the material from the periphery of the hole (Fig. 7), i.e. both are moving down

0 punch, and the punch 3 only under the action of the rocker 11.

As the sleeve 4 continues to rotate, the pins b approach the straight portion of the helical groove 7 and. as

5 would fall into it, at the same time the beam 11 also falls into the vertical section of the bayonet groove 9. Since the beam 11 no longer presses the punch 3, but moves along the vertical section of the bayonet groove 9, the punch 3

stops and flanging punch 2 moves on and completes the operation.

When the slide moves upward, the spring 12 precipitates the punch 3 down, then rotates it to the desired angle together with the sleeve, since the spring works to compress and twist, and the sleeve 4, punch 3 are connected by fingers 6 and rocker 11.

The stamp can be placed on any press, including manual ones.

Claims (1)

SUMMARY OF THE INVENTION A stamp for flanging holes containing a die, a punch holder, a flanging punch fastened thereto, a pressure punch covering a flanging punch, characterized in that, in order to enable the use of the stamp on simple presses, including manual ones, it is provided with a sleeve, an anti-friction washer , spring, rocker and pins, in the flange punch perpendicular to its longitudinal axis, there is a through, diametrical, expanding hole to the periphery, in the side walls azhimnogo punch near its end facing the puansonoder- zhatelyu are formed diametrically arranged radial through bayonet Aa h ° FIG. 2 grooves, while the sleeve covers the pressure punch, the anti-friction washer is installed on its end facing the mirror of the matrix in the central part of the side walls of the sleeve there are two through radial diametrically located screw grooves in the side walls of the sleeve near its end facing the punus holder and located with a gap relative to two through radial diametrically arranged openings of rectangular cross section are made, a spring is placed between the puncheon holder and the end face of the pressure punch facing the punch holder, and covers a flanged punch, with one end of the spring facing the punch holder and its end part is fixed in the punch holder and the other end thereof rests on the end face of the pressure punch and its end part is fixed in the sleeve, the beam is located in the through radial holes of the punches and sleeve with the possibility of They interact with the walls of these holes, and the pins are fixed in the central part of the pressure punch with the possibility of their interaction with the screw grooves of the sleeve covering it, the longitudinal axis of the pins being perpendicular to the longitudinal axis of the punches. AT 6 Tg FIG. 4 Ok Fie. 7