SU475205A1 - Automatic machine for the manufacture of tension springs with ears - Google Patents

Description

one

This invention relates to the manufacture of springs used in precision instrument making.

A known machine for the manufacture of a spring of extension with ears from an endless spiral, comprising a spiral feeding mechanism, a spring adjustment mechanism, an eye shaping mechanism, and a cutting mechanism mounted on the bed and connected kinematically to one another.

The purpose of the invention is to improve the accuracy of the geometrical parameters of the produced springs and to facilitate the process of changeover to the manufacture of springs of various sizes.

This is achieved by the fact that, in the proposed automaton, the length adjustment mechanism is made in the form of a coaxially mounted axially guided feed mechanism for the slide, and also two successively aligned stops arranged in series with each other, one of which is spring loaded in the direction of the slide motion, and connected to the crawler by means of a fork (fork lever), an axially spring-loaded pusher carrying an additional adjustable stop.

FIG. 1 shows the basic kinematic scheme of the proposed automaton; on

FIG. 2 - the position of the working mechanisms in the manufacture of the spring.

The machine consists of an electric motor 1, shaft 2, on which cams 3-6 are attached,

ratchet mechanism 7, feed rollers 8 and 9, knife sleeve 10, slider 11, the movement of which is limited by an adjustable stop 12 and a spring-loaded stop 13, an adjustable screw 14, a spring-loaded pusher

15 with an adjustable stop 16 fixed on it forks 17, knives 18 and 19, the stroke of which is adjusted by screws 20 and 21, a slider 22, a profile stop 23, springs 24-26 and a brake 27.

The machine works as follows.

The motor 1 drives the shaft 2, on which the cams 3-6 are mounted. The cam 3 rotates through the ratchet mechanism 7 and the slip slip clutch feed rollers 8 and 9, which feed the billet 28 through the knife sleeve 10 to the slider 11, the movement of which, depending on the working length of the spring and the number of bent turns, is limited by adjustable stops 12 and 13. The stop 12 adjusts the number of turns in the fold, and the stop 13 adjusts the length of the spring. The movement of the slide 11 according to a predetermined program is carried out by the cam 6 through the spring 24, the pusher 15

and plug 17.

The force of the spring 24 is less than the sum of the forces of the springs 25 and 26, but greater than their difference. This ratio of spring forces allows screw 14 to adjust the automaton to different lengths of the springs produced. The adjustable stop 16 serves to retract the slide 11 from the spring end at the time of the separation and unbending of the coil. The coil is separated from the workpiece and the finished spring section by a knife 18, the stroke of which is regulated by a screw 20. The coil is folded 19, hinged on the slide 22. Knife 19 moves forward, picks up the coil separated by knife 18 and bends it back to a predetermined angle, which is set by the stroke of the slider 22, adjustable by screw 21. When the coil is bent, the tip of the knife 19, resting against the edge of the coil, describes a curve close to the path of movement of the coil at the point of contact of the knife 19 with the turn of the coil. The nature of the curve of movement of the blade of the knife 19 when bending the turn is determined by the profile of the fixed profiled stop 23, along which the blunt end of the bending knife slides. The knives 18 and 19 work according to a predetermined program from the cams 4 and 5. The brake 27 keeps the feed rollers 8 and 9 from turning when the ratchet pawl returns to its original position.

Subject invention

An automatic machine for the manufacture of stretch springs from an endless helix, containing a helix feeding mechanism, a spring adjusting length mechanism, an eye shaping mechanism, and a cutting mechanism, which is designed to improve the accuracy of geometrical parameters of the springs and facilitating the process of changeover to the manufacture of springs of various sizes, the length adjustment mechanism is designed as coaxially mounted to the feed mechanism th in the axial direction of the slider and each arranged in series

the other parallel to the slider and two adjustable stops interacting with it, one of which is spring-loaded in the direction of movement of the slider, and connected to the slider by means of a forked lever which pushes the spring-loaded spring-loaded axle bearing an additional adjustable stop.

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