RU2210455C1 - Apparatus for making multistrand twisted springs - Google Patents

Abstract

FIELD: machine engineering and other branches of technology, namely manufacture of multistrand twisted springs. SUBSTANCE: spool is mounted on rest of lathe. Said spool includes reels with mechanisms for twisting and tensioning wire, for example arranged radially on spool in such a way that drive gear wheels of spool perform rolling motion around stationary central gear wheel mounted in the same axis with spool. The last rotates through shaft with spline groove and set of gear wheels with key placed in body of spool from common drive unit. EFFECT: synchronization and combination of processes of twisting rope and winding it on mandrel at simultaneous twisting and tensioning wire. 6 dwg

Description

 The invention relates to the field of manufacturing stranded coil springs in mechanical engineering and in other fields of technology.

 It is known that when a multicore spring is destroyed, at first one core is destroyed without violating the integrity of the spring, which makes it possible to detect a spring malfunction before its complete failure and avoid sudden product failure. This increases the reliability and safety of work, therefore, in some cases, its use is preferable for equal geometrical parameters with a single-core spring.

From Book 2, Machine Parts, edited by Dr. Tech. Sciences Professor N.S. Acerkana (State Scientific and Technical Publishing House of Engineering and Shipbuilding Literature, Moscow, 1953, p. 238), it is known that the manufacturing process of multi-core springs is divided into several operations, including:
1 - cable twisting on special machines;
2 - cable acceptance (viewing the cable and measuring its pitch and diameter);
3 - winding the spring from the cable with the help of another machine onto the mandrel of a specially selected diameter (the tension force of the cable when it is fed to the mandrel affects the position of the point F _{K of the} fracture of the characteristic on the spring force diagram).

 Special machines consist of an electric drive, a rotor twisting part (spool), a mounting frame and support rollers, a crimping device with die holders and twisting dies (eyes), a traction mechanism and a receiving mechanism for winding the rope onto the receiving coil (672 B-90, Bukstein M. A. "Production and use of steel ropes", Metallurgy, 1973, Moscow, p. 130).

 The winding machine includes a lathe ("Processing of materials by cutting", S. S. Nekrasov, Moscow, VO "Agropromizdat", 1988, p. 93), the main nodes of which are gearbox 1, gearbox 2, guitar with interchangeable gears 3 , caliper with tool holder 4, tailstock 5 (Fig. 1). The machine is controlled by: gearshift knobs; handle for switching the link of increased pitch; control fungus for cutting right and left threads; handwheel for manual longitudinal movement of the caliper; a slider with a button to turn on and off the rack gear of the apron; handle for manual transverse movement of the caliper; push-button station; handle to manually move the upper part of the caliper; button to enable quick movement of the caliper; handle for turning on, off, reversing the longitudinal and transverse feeds of the caliper; spindle on, off and reverse handles; apron uterine nut switching handle; feed control knobs.

 On this machine, due to its wide versatility, both multi-core from a finished cable and single-core springs from a bar (wire) are wound. For this, a three-jaw chuck 6 is mounted on the machine spindle for fixing one end of the mandrel 7 for winding the springs therein. The other end of the mandrel 7 supports the center of the tailstock 5. A cable (wire, rod) is passed through a sleeve (eye) mounted on a support in the tool holder. A longitudinal feed of the caliper provides a step to the winding spring.

 The disadvantage of such devices is that for the manufacture of multi-core springs requires two machines and two machine operations, which is unproductive.

 A device is known (Fig. 2) according to the copyright certificate 453212 with the claims: "Device for unwinding long material, mainly wire, containing a clip placed in the housing, carrying a coil with a supply of wire and a drive gear, characterized in that for the purpose of regulation during unwinding of twisting and tensioning forces, it is equipped with a sleeve and a flange coaxially mounted with a holder and rigidly connected with it, having slotted grooves made on its outer surface, and the gear is equipped with mounted inside it, parallel to one another, with friction discs entering the grooves of the sleeve. "

 The disadvantage of this device is the inability to manufacture multi-core springs.

 It is also known a device for the manufacture of multicore spirals, which contains a mandrel for winding spirals and mechanisms for rotating the mandrel and spools, on which coils mounted with wire are mounted (ed. St. USSR 1378996, class B 21 F 3/04, 03/07/1988). However, the known device is also not very suitable for the manufacture of multi-core springs.

 The present invention is to develop a device for the manufacture of multi-core springs 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 is achieved in that the device comprises a mandrel for winding a spring, a mechanism for rotating the mandrel and a mechanism for moving the spool along the mandrel with a sleeve for twisting the cable along with the mandrel and spools with coils containing a clip located in the housing, carrying a spring-loaded coil with a supply of wire and a pinion gear equipped with a sleeve and a flange coaxially mounted with a clip and rigidly connected with it, having slotted grooves made on its outer surface, and the gear provided with mounted wipe it parallel to one another with friction discs entering the grooves of the sleeve. The coils are mounted on the spool radially in such a way that the drive gears of the coils roll around a stationary central gear located on the same axis as the spool, and the spool rotates by means of a shaft with a keyway and gear sets with a key from the common drive located in its housing.

 For the manufacture of multi-core springs with a central core on the base of the spool, a self-aligning spring-loaded coil with a wire for the central core can be located on the same axis as the spool.

 The proposed device allows you to produce multi-core springs in one operation by synchronizing and combining the operations of twisting the cable and winding the cable onto the mandrel while twisting and stretching the wire.

 Figure 1 shows a lathe.

 Figure 2 shows the coil according to copyright certificate 453212.

 In FIG. 3 shows a diagram of the proposed device for the manufacture of a multicore spring.

 Figure 4 shows the spool of the device.

 Figure 5 shows a cross section of the drive shaft with a keyway.

 6 shows a multicore spring.

 The device consists of the following components and parts (Fig.3-5).

 The gearbox 1 with a built-in electric motor is connected to the feed box 2 and the drive shaft 14 of the spool 10 by means of a guitar 3. The sleeve (eye) 8 is fixed in the tool holder of the caliper (not shown conditionally) and is located in close proximity to the mandrel 7. One end of the mandrel is fixed in a three-jaw cartridge 6 gearboxes, and the second end of the mandrel is supported by the center of the tailstock 5 of the device. Coils 9 are located on the spool 10. The coil 11 is attached to the housing 4 of the spool 10 mounted on the support. The drive shaft 14 having a keyway, by means of a key 13 and a set of gears 12 is connected to the central gear 15 of the spool 10 and transmits rotation from the gearbox 1 to the spool 10. The feed screw 17 of the gearbox interacts with the support.

 The device operates as follows.

 Coil 9, wired with wire, is installed in the device, similar to that shown in FIG. 2. The wire from the coils is passed through the sleeve (eye) 8 and pinched on the mandrel 7. Then turn on the motor of the device. In doing so, the following occurs.

 1 - The spool 10 with the coils 9 located on it rotates in the spool casing 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 8 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 winds the cable twisted in the sleeve (eye) 8 onto itself. The sleeve (peephole) 8 and the spool 10 mounted on the support move along the mandrel 7, forming a step of the coil spring. The support is moved by the lead screw 17, and the movement step is provided by setting the feed box 2 and the guitar 3. In this case, due to the rotation of the coils 9 and their design, the necessary efforts of twisting and stretching the wire are created when twisting into a cable and simultaneously winding the cable onto the mandrel 7.

 At the same time, with the help of the proposed device, it becomes possible to quickly adjust the pitch and angle of the cable twist, the twisting and stretching forces of the wire according to the results of testing a newly wound spring, and due to the presence of a common drive, the synchronization of the nodes of the cable twist and the cable winding on the mandrel is achieved. This is useful and helps to improve the quality of the springs and the productivity of their manufacture.

Claims (1)

 A device for manufacturing multi-core springs, including 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 rope along with the mandrel and rotating spools with coils containing a clip placed in the housing carrying a spring-loaded coil with a supply of wire and a drive gear equipped with a sleeve coaxially mounted with a clip and rigidly connected with it, having slotted grooves made on its outer surface, and a flange, and the gear being provided and friction disks mounted inside one another parallel to one another, which are included in 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 keyway and gears from a common drive.

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