SU422502A1 - ROLLER DEVICE FOR CUTTING DETAILS FROM SHEET MATERIAL - Google Patents

Description

one

The invention relates to equipment for the perforation of sheet material, in particular metal, and cutting out of it is detailed by means of rotating rollers.

Known roller devices for cutting sheet material parts include rollers that are coupled with gears. Punches are installed on at least one of the rolls, which with the help of an eccentric shaft placed in the cavity of the roll on which the punches are located, and rotated relative to it, receive a radial movement relative to this roll.

A disadvantage of the known device is that the cutting process starts on it with an inclined arrangement of the puzzon relative to the die and the maximum gap between them, decreasing as the rolls are further rotated. As a result of this mutual arrangement of the stamping tools during the cutting process, burrs are formed. In addition, the result of this arrangement is the low durability of the punching tool and the relative difficulty of controlling the magnitude of the radial movement of the punches.

The purpose of the present invention is to obtain a uniform gap between the die and the punch in the process of cutting material.

For this, the rollers are provided with a mechanism that interrupts their rotation and synchronizes the boom with the period of interaction of the eccentric shaft and punches. This mechanism is made in the form of a Maltese cross, fixed on the same axis with a roller carrying punches and one of the gears of gearing; an additional pair of gears, one of which is located on the axle of the eccentric shaft, and the other is in engagement with it; drove, fixed on the same axis with this wheel. The pins of the roll bearing the punches are made with coaxial cylindrical cavities in which cylindrical pins of the eccentric shaft are arranged eccentrically with them and coaxially with each other.

FIG. 1 shows the kinematic scheme of the device proposed; in fig. 2 -

device in longitudinal section; in fig. 3 - cross section; in fig. 4 is a view according to A-A in FIG. 2

The device contains rolls 1 and 2, the pins of which are located on the bed 3. Roll 2

An eccentric shaft 4 is made hollow and in its cavity. The shaft journals are located in the hollow roll axles and rest on the sleeves 5. The rolls 1 and 2 are interconnected by gear gears 6 and 7. On the axis

eccentric shaft fixed gear wheel 8, which is engaged with the gear wheel 9. On the axis of the gear gear

7, a Maltese cross 10 is installed, and on the axis of the gear wheel of the 9-carrier 11. In the roll 1 in the holder 12 are the dies 13. The roll 1 is made hollow, and a tray 14 is placed in the cavity to remove the waste of the string.

The roll 2 is also fixed to the holders 15, and punches 16 are located there with pushers 17 and springs 18. The surface of the roll 2 is covered with an elastic material, in particular rubber 19, by means of which the rolls move the chip material 20 during rotation.

The rollers from the electric motor 21 rotate through the V-belt drive 22 and the tongue 23, which is seated on the shaft 4. The shaft makes a circular rotational motion and in its lower position through the pushers acts on the punches. The mechanism of the Maltese cross provides the shaft with an effect on the pushers and punches when the rollers are stationary, with the installation of the corresponding die and tool on the same axis. The punch stroke is adjusted by radial movement of the shaft in the roll cavity.

Subject invention

Claims (2)

1. A swathing device for cutting parts from sheet material, containing interconnected toothed meshing rolls, at least one of which has punches that receive a radial, adjustable movement relative to this roll by means of an eccentric shaft placed in the cavity of the same roll and rotated relative to it, characterized in that, in order to obtain a uniform gap between the die and the punch in the process of cutting the material, the rollers are equipped with a mechanism interrupting their rotation and synchronizing the boom with the period of interaction of the eccentric shaft and punches made in the form of a Maltese cross fixed on the same axis with the roller carrying the punches and one of the gears of said gearing, an additional gear frame wheels, one of which is located on the axle of the eccentric shaft, and the other is in engagement with it, and the carrier fixed on the same axis with this wheel. 2. The swath device according to claim 1, characterized in that, in order to simplify the adjustment of the movement of the punches, the trunnion of the roll carrying the punches is made with coaxial cylindrical cavities in which cylindrical axles of the eccentric shaft are arranged coaxially with them.  ; (vX 6 77-; I 7Z 9uz g 75