SU422498A1 - MACHINE FOR MANUFACTURING COILS FROM PIPE PREPARATIONS - Google Patents

Description

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The present invention is applied to the field of pipe bending production, in particular to devices for making coils.

Previously known machines designed for the same purpose and containing, a stand with feed rollers located on it with pressing mechanisms and a bending roller having the ability to move in the direction perpendicular to the axis of the coil do not provide the possibility to obtain coils with variable pitch which can be changed occur in the process of bending.

The purpose of the present invention is to manufacture coils with variable pitch and forming any shape, for example conical.

For this, the axis of the bending roller is connected to the piston of the power cylinder located on the bed and allowing the roller to move in the direction perpendicular to the bed plane during the bending process, while the roller surface is made in the form of a truncated cone with a curvilinear generatrix.

FIG. 1 shows the proposed machine, side view; in fig. 2 - the same plan view; in fig. 3 - kinematic diagram of the machine; in fig. 4 - the same plan view.

The coil bending machine consists of a box-shaped base 1, on which

Four carriages 2 are mounted, each with interchangeable pushing rollers 3. On the base 1 a caliper 4 is mounted, the position of which is fixed by screw pairs 5 (Fig. 4) from a manual drive 6. In the front part of the caliper on the guides 7 there is a carriage 8 with a rearranged an axis 9 (fig. 3) and a bending roller 10 mounted on it 10. The axis of the roller 10 is bolted

to the piston 11 of the hydraulic cylinder 12, which serves to move the bending roller vertically and installed in the lower part of the carriage 8, in which two hydraulic cylinders 13 and 14 are also placed to move the carriage

right and left.

On the base 1, between the pushing rollers 3 and the bending roller 10, a shoe 15 is installed with a replaceable sleeve 16 made of antifriction material. To shoe also

an annular heating element 17 is attached. The pushing rollers 3 are rotated from the electric motor through a gearbox and a cylindrical gear pair consisting of one gear 18 and two gear wheels 19.

The carriages 2 are mounted with stop screws 20 with a nut 21 (Fig. 2).

Horizontal 22 and vertical 23 copiers (Fig. 4) to move the bending roller 10 are connected through four pairs of bevel gears 24 and two gear sleeves 25 s

roller sensor 26, which is pressed by spring 27 (Fig. 3) to the blank pipe 28. Copiers are connected to hydraulic sensors 29 and 30 that control the flow of pressure into the cavity of hydraulic cylinders 12-14. The clamping force of the pipe is regulated by a pressure regulator located on the control panel (not shown).

The stack works as follows.

The welded lash of the pipe is laid on the roller conveyor and fed into the pushing rollers 3. Depending on the direction of the bend, the lying pair of rollers 3 is fixed by rigidly fixed screws 20, and the opposite rollers are laid by means of hydraulic cylinders 31. The bending arm is manually changed by two By means of: shifting the axis of the bending roller 10 and fixing it in the desired position and rotating the screw pairs 5 moving the support 4 in the longitudinal direction.

After installing the desired arm, the end of the pipe is brought to the level by a bending roller to its original position, and the bending roller 10 is moved using hydraulic cylinders controlled from the console manually or according to a predetermined program using hydraulic sensors, which operate copiers moving during the bending process synchronously

with the workpiece. If necessary, one of the copiers can be disabled. The bending radius of the coil changes by moving in the transverse direction of the carriage 8. The movement is carried out by applying pressure to the hydraulic cylinder 13 or 14 depending on the direction of winding of the coil.

In order to change the coil pitch during the bending process, the bending roller 10 is raised by applying pressure to the hydraulic cylinder 12.

Subject invention

A machine for making coils from tubular blanks, comprising a frame with feed rollers located on the machine with biasing mechanisms and a bending roller that can be moved in a direction perpendicular to the coil axis, characterized in that in order to manufacture coils with variable pitch and forming any given form, for example conical, the axis of the bending roller is connected to the piston of the power cylinder, located on the frame and providing

moving the roller in the direction perpendicular to the bed plane during the bending process, the roller surface being made in the form of a truncated cone with a curvilinear generatrix.

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