SU69098A1 - Spring Coiling Machine with Polygonal Profile Coils - Google Patents

Description

Machines for winding springs with coils of a polygonal profile are already known, consisting of rollers for feeding the wire, an emphasis for curling the end of the wire, an emphasis for deflecting the twisted turns, respectively, the spring pitch and scissors for cutting the spring into pieces.

In contrast to the known machines, in the proposed machine, the emphasis for curling the end of the spring is under the action of an actuator for periodically withdrawing it from the wire feed path. This makes it possible to form a turn of straight sections in the profile.

FIG. 1 shows the kinematic diagram of the machine; in fig. 2 — a mechanism for obtaining a spring profile; in fig. 3- spring cut mechanism. Rotation from the electric motor is transmitted through friction 1 (Fig. 1) to shaft 2, connected by a parasitic gear wheel to shaft 3, on which there is a profile copier 4 and eccentric 5 outside.

From the shaft 3, the rotation is transmitted through the roller sleeve 6 to the shaft 7. In the latter, the handwheel 8 is fixed outside for manual feeding of the wire during adjustment. When the handwheel 8 rotates, the clutch 6 is wedged, and the rotation is transmitted only to the interchangeable gear 9 and 10, to the shaft I, and then to the shafts 12 and 13, on which the rollers 14 are seated. . It gives great convenience when setting up.

Replaceable pin 9 and 10 and feed rollers 14 are chosen so that for one revolution of the copier shaft 3 the wire is fed to half the perimeter of one turn of the spring. On the profile copier 4 fixed on the shaft 3 with a roller rests the slider 15 (Fig. 2), to which the holder 16 is fixed. In the latter there is

No. 69098

radius stop 17, adjustable along the wire feed axis with a bolt 18. At the indicated (in Fig. 2) position of copier 4, the slider 15 is raised in the guide bars 19, and the radius stop 17 blocks the path of the wire.

When the wire is fed by the feed rollers 14, the wire rests on the radius stop 17, slides over it and curls along the radius.

By approaching or removing the radius stop 17, the magnitude of the curl radius changes. When the cam 4 is rotated into the low section, the slider 15 with the radius stop is under the action of the spring 20. The wire, not meeting resistance, passes over the radius stop. Thus, the first portion is obtained. During one revolution of the copier 4, a half turn of the spring is obtained.

By giving a different number of low and high sections of copier 4, it is possible to produce springs of any shape (triangular, tetrahedral, rum., Etc.). When installing a round-shaped copier, it is possible to wind round springs around the diameter of the blade.

In order to maximize the productivity of the machine, the spring cut is performed on the move without stopping the wire feed. This is done at the time of the end of the wire curling, when the profiling copier goes to the forward stroke section of the wire. This requires a quick approach and removal of the cutter, because otherwise the wire will go from the straight section to: curl and press into the cutter.

Located not. using the copier shaft 3, the eccentric 5 pushes the stud 21 (Fig. 3) with the lever 22. The latter is connected by adjusting the thrust 23 with the box 24 swinging on the shaft 25 of the ratchet 27 and carrying the dog 26 in the upper part. the wheels are single with 12 teeth and a working tooth with three teeth located near the shaft, 25 shaft 25. The single ratchet is 27 diameters larger than the working ratchet and has four teeth with a deep depression through three normal teeth. Dog 26 in width overlaps both ratchet. When a dog gets on a normal tooth, the dog turns the single ratchet 27 and passes over the working ratchet tooth. After three such moves, the dog gets into a deep., Hollow, enters simultaneously the working ratchet and turns both ratchets on one tooth. At this moment, there is one revolution of the shaft 25, on which the disk 28 is fixed. At the time of the tooth cuts the roller 29 finds, squeezes it out, forcing the shaft 30 to rotate, on which the holder with the cutting tool 31 is mounted outside (Fig. 2). A spring section is produced at the top of the tooth. This happens half the stroke of the pawl 26 (Fig. 3), the second half of the stroke advances the tooth further until the roller 29 is released and under the action, the return spring returns to its original position.

Subject invention

A spring coiling machine with coils of a polygonal profile consisting of rollers for feeding wire, stop for curling the end of the wire and scissors for cutting the spring into pieces, characterized in that the stop for curling the end of spring is under the action of an actuator for periodically removing it wire, in order to form a coil of straight sections at the profile.

Fig 1

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