RU2364461C1 - Device for high-strength multi-core springs manufacturing - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention refers to mechanical engineering and can be used in helical compression springs manufacturing. The device contains driver for spring winding, mechanism for driver rotation, spooler having radially positioned on it reels with driving gears and spring-loaded reel with wire stock, and mechanism for spooler moving along driver. It holds hub for wire twisting into cable. The hub is mounted with possibility to move along driver. Fixed central gear is located on one axis with the spooler. Driving gears of reels are performed with possibility to rotate when being rolled around fixed central gear, and the spool is made rotatable by means of drive shaft with keyslot, gear set and actuator. The device is executed with inductor for heating wire passing through it. This inductor is located on spooler moving mechanism next to mentioned hub for wire twisting into cable.

EFFECT: technological capabilities are expanded and spring quality is improved.

2 cl, 5 dwg

Description

The invention relates to the field of manufacturing multi-core compression screw springs in mechanical engineering and in other areas of technology from hardened, patented, pre-thermomechanically processed wire, including high-temperature HTMO.

A device for the manufacture of multi-core springs according to US Pat. EN 2210455 C1 [1], comprising a mandrel for winding a spring, mechanisms for rotating the mandrel and spools and mechanisms for moving the spool along the mandrel, with a sleeve for twisting the wire into a cable and a rotating spool with coils containing a clip carrying a spring-loaded coil placed in the housing with a supply of wire, and a drive gear equipped with a sleeve coaxially mounted with a ferrule and rigidly connected to it, having slotted grooves made on its outer surface, and a flange, and the gear is not equipped with internally mounted parallel to one another by friction disks entering the grooves of the sleeve, characterized in that the coils are placed radially on the spool so that the drive gears of the coils are rotated, rolling around the stationary central gear located on the same axis as the spool, and the spool rotates by means of a shaft with a key a groove and gears from a common drive. This device allows you to wind high-quality multicore springs from a patented wire in one operation by synchronizing and combining the operations of twisting the cable and winding the cable onto the mandrel with simultaneous twisting and stretching of the wire.

The technical result of the present invention is the expansion of the technological capabilities of the device and a further improvement in the quality of the springs.

The technical result is achieved by the presence of an inductor for heating the wire passing through it, located on the mechanism for moving the spool next to the sleeve for twisting the wire into the cable, and the presence of a cooling device located on the mechanism for moving the spool, for cooling the coil spring passing through it.

Figure 1 presents a lathe designed for modernization; figure 2 shows a diagram of the proposed device for the manufacture of a multicore spring and a cross section of the drive shaft with a keyway; figure 3 shows the spool of the proposed device; figure 4 shows a coil for accommodating wire; figure 5 shows the manufactured stranded spring.

The device consists of the following components and parts. The gearbox 1 with an integrated drive is connected to the feed box 2 and the drive shaft 14 of the spool 10 by means of a guitar 3. The sleeve for twisting the wire into a cable 8 is fixed in the tool holder 18 of the caliper 4 and is located in close proximity to the mandrel 7. An inductor is also attached to the tool holder 18 heating the wire passing through it 19. The mandrel 7 with a winding spring passes through a cooling device 20 attached to the caliper 4. One end of the mandrel 7 is fixed in a three-jaw chuck 6 gearbox, and the second end of the mandrel hered tailstock center device 5. Coils 9 [2] are located on the spool 10. A spring-loaded coil 11 is attached to the housing 21 of the spool 10 mounted on the support 4. The drive shaft 14 having a keyway is connected to the central gear 15 of the spool 10 by means of a key 13 and a set of gears 12 and transmits rotation from the gearbox 1 to the spool 10. The lead screw 17 of the feed box interacts with the caliper 4, moving it.

The device operates as follows.

A wire-mounted coil 11 and a coil 9 are installed in the device, similar to those shown in Fig. 4. The wire from the coils is passed through a sleeve for twisting the wire into a cable 8 and pinched on the mandrel 7. Then turn on the drive device.

In doing so, the following occurs.

1. The spool 10 with the coils 9 located on it rotates in the bobbin case 4 in the required direction by the action of the drive shaft 14 and a set of gears 12 on the spool gear 15. In this case, the drive gears of the coils 9 are rolled around the stationary central gear 16 located on the same axis as the spool The central wire is stretched between the coil 11 and the mandrel 7 and is the basis of a multicore spring with a central core. A wire from coils 9 is wound on it and twisted into a cable. In the absence of a central wire, the cable is twisted without it.

2. The mandrel 7 rotates and draws the wire from the spring-loaded coils 9 and 11 through the inductor to heat the wire 19 and winds the cable heated in the inductor 19 and twisted in the sleeve 8 onto itself, forming a spring. A sleeve 8, an inductor 19, a cooling device 20 and a spool 10 mounted on a movable caliper 4 move along the mandrel 7, forming a step of the coil spring. In this case, the wound spring passing through the cooling device 20 is cooled. The support is moved by the lead screw 17, and the movement step is provided by setting the feed box 2 and guitar 3. At the same time, due to the rotation of the coils 9 and their design, they create the necessary twisting and stretching forces for the wire when twisting into the cable and simultaneously winding the cable onto the mandrel 7, and Due to the design of the device, the pitch and angle of twisting of the cable and the pitch of the winding spring are promptly adjusted.

A spring wound in this way of a given length is cut off and sent to weld the ends of the cores, if necessary, further heat treat, apply a protective coating, gouge, measure the geometric and power parameters according to the method [3].

The advantage of the proposed device over the known ones is that when winding multi-core springs on the proposed device, it is possible to simultaneously produce the following types of heat treatment along with the winding, using an inductor and a cooling device in various combinations:

- multicore springs from hardened wire - quenched during winding;

- multicore springs from a patented wire or having undergone preliminary thermomechanical processing, including high-temperature ones - subject to tempering when winding;

- multicore springs from a patented wire or having undergone preliminary thermomechanical processing, including high-temperature - when winding, subjected to additional thermomechanical processing [4];

- hard springs of small index during winding to heat up to reduce the efforts of winding and achieve tight winding.

The achieved expansion of the technological capabilities of the device will allow you to combine the manufacturing operations of the springs and improve their quality.

Information sources

1. Pat. RU 2210455 C1, IPC B21F 35/00. Device for the manufacture of stranded coil springs. / Zemlyanushnova N.Yu., Tebenko Yu.M. - No. 20022120673/12; declared 07/29/2002; publ. 08/20/2003. Bull. Number 23. - 6 p.

2. A.S. 453212 USSR, M. Cl. B21C 47/16, B21F 23/00. Device for unwinding long material. / Tebenko Yu.M. - No. 1913370 / 25-27; declared 05/03/73; publ. 12/15/1974, Bull. No46 for 1974 - 2 s.

3. Application No. 2007144045 (048256) dated 11/27/2007 (decision to grant a patent from 11/18/2008).

4. Rakhstadt A.G. Spring steel and alloys. - 3rd ed. reslave. and add. / A.G. Rakhstadt.- M .: Metallurgy, 1982.- 400 p.

Claims (2)

1. A device for the manufacture of multi-core springs, containing a mandrel for winding the spring, the rotation mechanism of the mandrel, a spool having radially arranged coils with drive gears and a spring-loaded coil with a supply of wire, a mechanism for moving the spool along the mandrel, located on it with the ability to move along the mandrel a sleeve for twisting the wire into a cable, a fixed central gear located on the same axis as the spool, while the drive gears of the coils are made to rotate when rolling them around the stationary central gear, and the spool - with the possibility of rotation by means of a drive shaft with a key groove, a set of gears and a drive, characterized in that it is equipped with an inductor for heating the wire passing through it, located on the mechanism for moving the spool next to the mentioned sleeve for laying the wire into the cable. 2. The device according to claim 1, characterized in that it is equipped with a cooling device located on the mechanism for moving the spool, for cooling the coil spring passing through it.

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