SU1655600A1 - Three-roll asymmetrical sheet bending device - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular, to devices for bending cylindrical parts from sheet material such as shells. The purpose of the invention is to increase the efficiency of use of the device under conditions of small-scale production. The workpiece is clamped between the front and middle rollers, which, rotating in opposite directions, grip and move it all the way to the rear roller. The workpiece deviates from the rectilinear movement and bends. The bending radius is determined by the amount of displacement of the rear roll relative to the direction of the picker. The setting for the given bending radius is carried out using a screw co-operating SCREW. The invention provides the possibility of using the device on various types of machine tools 3 Il.

Description

The invention relates to the processing of metals by pressure, in particular, to devices for bending cylindrical parts from sheet material such as shells.

The purpose of the invention is to increase the efficiency of use of the device in the conditions of small-scale production.

FIG. 1 shows the device, a general view; 2 is a section A-A in FIG. one; on fig.Z - section bb in figure 2.

The device comprises a front roller 1 mounted on a base 2, an middle roller 3 mounted in a lathe chuck 4, as well as a rear roller 5 connected to the middle roller 3 by means of a pin 6 and levers 7, as well as a rotation setting drive 8 roll 5. The front roll 1 on the base 2 is fixed in the tool holder 9 of the machine. The rolls 1 and 3 are made with the corresponding gear gears 10 and 11. The screw 12 of the drive 8 is pivotally mounted on the base 2 in the hole 13 of the block.

The device works as follows

The sheet stock is inserted into the back gap between the front roller 1 and the middle roller 3 into the rear bending roller 5 until it stops. After turning the handle of the lathe support, the tool holder 9 of the machine with its base 2 fixed in it is moved to the center line of the machine. This is clamped between the rolls 1 and 3. After that, the turning of the lathe spindle is turned on. Rolls 1 and 3, rotating in opposite directions, grip the workpiece and move it. The workpiece, abutting against the back bending roll 5, deviates from a straight-line movement and bends.

The bending radius is determined by the amount of displacement of the rear bending roller 5 relative to the rolls 1 and 3. The movement of the roll 5 is carried out by turning the rod 6 and the levers 7 by means of a screw 12. The bending radius is adjusted.

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placing between the tie 6 and the base 2 an appropriate pattern or set of dimensional tiles 14.

With a large bending effort, the roll 3 is clamped by the center mounted in the tailstock of the lathe.

The proposed scheme provides compactness of the device and the possibility of placement on various types of machine tools.

Claims (1)

Formula of invention A three-roll asymmetric bending machine comprising a front roller mounted on a base, a middle roller and also a rear roller, connected to a drive through a pair of levers its tuning rotation, characterized in that, in order to increase the efficiency of its use in small-scale production conditions, the heart roll made with the possibility of console mounting in the chuck of the lathe, the base is made with the possibility of mounting in the tool holder machine, while the front and middle rolls are made with the corresponding gears, the drive of the adjusting rotation of the rear roll is made in the form of a connecting stitch levers with a hole and a screw pair, the screw of which is hinged on the base and placed in the stitch hole, and the nut is adapted to interact with the tie. ® "/ Fig.Z FIG. 2