SU1180128A1 - Apparatus for cooling strings - Google Patents

Description

The invention relates to mechanical engineering and can be used in factories for mass and mass production of springs cold naviv-. ki,

The purpose of the invention is the expansion of the technological capabilities of the device.

1 shows a diagram of a specific implementation of the device; figure 2 - scheme of the device; on fig.Z - mandrel; figure 4 - the placement of the turns of the spiral on the mandrel; figure 5 - layout of the wire on the guide rollers.

The device comprises a housing 1 (FIG. 1), on which a hollow shaft 2, a leash 3 rigidly attached to the shaft 2, a winding shaft 4 connected to the leash 3 bearing assembly 5, a mandrel 6 and a movable bevel gear 7 fastened are placed with the help of bearings with shaft 4, stationary bevel gear 8, placed on housing 1 coaxially with hollow shaft 2, curvilinear channel 9, made of pipe and fastened to leash 3, cutting mechanism, made in the form of knives 10, guide rollers 11 and 12, pressure screw 13 , adjustable counterweight 14 placed on Figure 3, a pulley-flywheel 15 and a drive (not shown), indicating rotational movement of the hollow shaft 2 and the reciprocating knives 10 of the cutting mechanism.

The mandrel 6 is made in the form of a collet with elastic petals 16 (FIGS. 3 and 4). the rigidity of which is regulated by the screw 17, its lateral surface consists of combinations of cylinders and truncated cones.

Roller 11 (figure 5) has a rectangular groove, into which the cylindrical surface of roller 12 enters with a minimum gap. The width of the groove is chosen equal to two wire diameters.

To create tension on the wire between the mandrel 6 (figure 1) and the guide rollers 11 and 12, the latter are equipped with a brake mechanism (not shown).

The device works as follows.

The free end of the wire billet 18 of a riot or spool through the gap between the guide rollers 11 and

ten

15

20

25

thirty

35

40

45

50

12, skirting the roller 11, is passed through the axial hole of the hollow shaft 2 and is fixed on the mandrel 6. The drive is turned on, which causes the flywheel 14, the hollow shaft 2, the leash 3 and the curved channel 9 around the axis of the hollow shaft 2 to rotate. the movable gear 7, being in engagement with the fixed gear 8, makes a complex movement consisting of the rotational shaft together with the hollow shaft 2 and relative around the axis of the winding shaft 4. The mandrel 6 makes the same movement, therefore the wire 18 is wound on the plate 6 and together with her rotates around the axis of the hollow shaft 2, twisting around its axis.

The wire helix 19 under pressure of the newly formed coils is displaced along the axis of the mandrel 6 and enters the curvilinear channel 9, from which it extends to the continuation of the axis of the hollow shaft 2. Here it rotates only around its axis and moves horizontally to the cutting mechanism, where the knives 10 cut off into dimensional lengths The finished spring falls into the container.

Gears 7 and 8 are replaceable. Their diameters are chosen depending on the angle of twisting of the wire on one turn of the spring. So, for example, if angle 27 is necessary? , then the diameters of the gears are the same, then the movable gear 7, having made one revolution around the axis of the hollow shaft 2, rotates around the axis of the winding shaft 4 one revolution and winds one turn on the mandrel 6. If you need a twisting angle less than 2ίΓ ^ then the diameter of the movable gear 7 should be taken less than the diameter of the fixed gear 8 and, conversely, to obtain an angle larger than 2ΊΓ the diameter of the gear 7 should be greater than the diameter of the gear 8.

Therefore, the attachment of the fixed gear 8 to the housing 1 is slotted, i.e. it can move along the axis of the hollow shaft 2 and be fixed at a certain place.

The mandrel 6 must keep the helix 19 from slipping along its

surface, so it is made

in the form of a collet, the petals of which perform this function, a non-55 is created

3

circumferential pressure on the inner surface of the spiral.

Rollers 11 and 12 perform three functions: guide the wire into the cavity of shaft 2, keep it from rotating around its axis in the area from rollers to riot (therefore, their working surface is made in the form of a closed gauge) and create the necessary tension of the wire before winding it on the mandrel 6 An adjustable preload is created by a brake mechanism (not shown), with which rollers 11 and 12 are fitted.

The proposed device is easy to manufacture and maintain, allows you to wind the spring with the initial inter-turn pressure, which

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is achieved by twisting the wire rod before winding it into a spiral, and thereby improve the quality of the springs. The working stroke of such springs is increased by reducing the preliminary deformation.

The device allows winding multicore springs, the turns of which consist of pre-twisted two or more wires. To this end, the device should be threaded with two or three parallel wires.

₍ · On the proposed device, it is possible to form tension and ejection springs of the right and left windings. The right or left winding of the springs depends on the | Direction of rotation of the hollow shaft 2.

FIG. 2

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Claims (2)

1. DEVICE FOR FILLING SPRINGS, comprising a casing, a winding unit made in the form of a driving mandrel, means for guiding the wire and a mechanism for twisting the wire during the winding process, characterized in that, in order to expand technological capabilities, it has a cutting mechanism placed behind the winding unit, the mechanism for twisting the wire consists of a drive hollow shaft mounted in the housing with the possibility of rotation, rigidly fixed on the hollow shaft of the carrier placed on the carrier with the possibility of rotation a spindle rigidly mounted on the body of the central gear mounted on the spindle of the satellite gear installed with the possibility of interaction with the central gear and attached to the curved curved tube forming a curved guide channel, while the means for guiding the wire consist of two spring-loaded brakes attached to each other guide rollers with grooves on the working surfaces, and the mandrel is fixed on the spindle so that its axis is perpendicular to the axis of the hollow shaft and lies with it in the same plane, about The symmetry of the input part of the guide channel coincides with the axis of the mandrel, and the symmetry of its output part coincides with the hollow shaft. 2. The device according to claim 1, of which is that the mandrel is made in the form of a cone with radial grooves and a central threaded hole with a tapered lead-in part and a screw with a tapered head placed in the threaded hole, ·; installed with the possibility of vzai | action with a conical lead-in part of the threaded hole. 1180128 > one 1180128 2