SU1319987A1 - Arrangement for manufacturing cylindrical helical springs - Google Patents

Abstract

The invention relates to devices for the manufacture of cylindrical coil springs and allows the manufacture of springs having alternating turns of two different diameters. The device contains. Stand 1, on which the headstock 2, support 3 and stand 46 are mounted. To the face of the headstock 2 when 11 f 23 2 f SO, 32 3Jf a & (L CAd CO x 30 Fig. 1

Description

the front part 8 of the mandrel 9 is fastened, the rear part 24 of the mandrel 9 is attached to the holder 23 mounted in the bearing assembly in the carriage 10 of the caliper 3. The carriage 10 through the rollers mounted in it rests on the apron 1I of the caliper 3 and has a longitudinal movement relative to the apron with the possibility of fixing tightening handles 18 of bolts 19 and relative to frame 1 with the possibility of fixation through a rack 46. The support relative to frame 1 has a manual one, through a rail 14, or mechanically driven from a lead screw 12 through a running nut 13. On top

The invention relates to devices for the manufacture of cylindrical coil springs used in vehicle suspension spring systems, in particular for the manufacture of springs having alternating turns of two different diameters.

The purpose of the invention is to expand the technical capabilities by manufacturing springs with alternating coils of two different diameters.

In Fig.1 schematically shows the proposed device, a General view; Fig.2 mandrel, a general view; on fig.Z - section aa in figure 1, the position of the latch in the mandrel; Fig. 4 is a section B-B in Fig. 2, the construction of the mandrel.

The proposed device is made on the basis of a screw-cutting lathe. A device for winding cylindrical coil springs with a number of working turns of 3-3.5, in which turns of two different diameters alternate with each other (Fig. 1), contains headstock 2 mounted on stanica 1. In cartridge 4 of headstock 2, a lever mechanism 5 for clamping the end of the workpiece is mounted, and to the faceplate 6 of the cartridge 4, screws 7 of the mandrel .9 have a screw groove corresponding to the shape of the spring to be made. In this case, the mandrel is divided into two parts along a groove of a smaller diameter. Both parts have cavities with a longitudinal groove, which includes a protrusion of the retainer 36 connected by a rod with the piston of the pneumatic cylinder 31. The rotary movement actuator 28 is mounted on the carriage 10 of the holder 23. The spring-loaded roller 44 serves to bend the end of the spring support coil and to facilitate removal of the wound springs with mandrel. 3 hp f-ly, 4 ill.

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Replena front part 8 of the mandrel 9 (figure 2). The support 3 consists of a carriage 10 and an apron 11 and has the ability to move along the base 1 in the longitudinal direction either automatically, by means of the spindle 12 and the spindle nut 13 mounted in the apron 11, or by means of a manual drive by means of the rail 14 and gear 15. The carriage 1 O and apron 11 also have the possibility of longitudinal movement relative to each other, for which they are coupled with rollers 16 mounted in carriage 10, rolling together with carriage 10 along upper surface 17 of apron 11. Longitudinal movement of support 3, as one unit, possibly after tightening the knobs 18 with bolts 19 installed in the holes of the carriage 10. The rod 20 of each of the bolts 19 passes into the longitudinal groove closed at the ends, made in the upper part of the apron 11, and ends with the head 21. the bolt 19 with the handle 18, the head 21 of the bolt with the inner surface is pressed against the corresponding surface of the upper part of the apron 1 1, and these both parts of the support are fixed motionless relative to each other. On the JO carriage caliper Z. in the bearing assembly 22, the holder 23 of the rear part 24 of the mandrel 9 mounted to the face-plate 25 is mounted with screws 7 (similarly

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the front of the mandrel). At the other end of the holder 23, a gear wheel 26 is fixedly mounted, which engages with a bustern 27 mounted on the shaft of the electric motor bore 28, forming a gearbox 29 for driving rotational movement of the rear part 24 of the mandrel 9. The electric motor 28 is mounted on the carriage 10.

A pneumatic cylinder 31 is attached to the housing 30 of the reducer 29, the two cavities of which are connected by a pipe 32 to a two-way valve 33 supplying air to one of the cavities of the cylinder 31 separated by a piston 34, the piston 34 is installed at the end of the rod 35 passing through the central hole in the holder 23 and at the other end of the terminating cylindrical lock 36 (figure 4), having 1m longitudinal protrusion 37 and entrance w: im in cavity 38 and 39 of the front 8 and rear 24 of the mandrel 9. The clamp is needed to ensure the correct mutual arrangement of both parts of the mandrel 9 from respecting each other. The latch 36 can be made and in the form of a rectangular rod not shown). The frame 9 (FG.1-3) on the outer surface has guide helical grooves 40 corresponding to the shape of a coiled spring. At the end of the apron 11, a roller 41 feeding the spring blank 42 is movably mounted on the axle. A bracket 43 with a spring-loaded roller 44 serves to press the last spring coil to the mandrel 9, and to the shearer to move from the end of the supporting coil when removing the spring from the mandrel. A similar bracket with a roller (not shown) is mounted on the headstock and also serves to shift the end of the opposite support turn. The carriage 10 with respect to the bed 1 in the longitudinal direction is fixed and fixed by means of a rod 45, a removable stand 46 and a clamp 47.

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The device works as follows.

Each of the two parts 8 and 24 of the mandrel 9 is fastened with screws 7 respectively to the faceplate 6 of the chuck 4 and to the faceplate 25 of the holder 23. At the same time, each of the parts 8 and 24 of the mandrel 9 can have independent rotational movement relative to each other due to the rotation of the cartridge 4 and the

l 23, which is driven by an electric motor 28. In order for the helical grooves 40 at the junction of the two parts 8 and 24 of the mandrel to coincide, the latter are turned relative to each other until the latch 36 with its projection 37 becomes in both slots of the cavities 38 and 39. The latch 36 is supplied to a predetermined position by air pressure in the pneumatic cylinder 31 to the piston 34 through a rod 35 connected to it. Before this operation, both parts of the mandrel must be aligned relative to each other in the longitudinal direction.

the direction by moving the slide 3 along the bed 1. After that, the knobs 18 release the bolts 19 and release the carriage 10 from the connection with the apron 11 and the latter is moved to

the side of the headstock 2 until the roller 41 reaches the level with the first turn of the screw groove 40 on the front part 8 of the mandrel 9, and the carriage 10 relative to the base 1 in the longitudinal

the direction is set and fixed by means of a rod 45, a removable rack 46 and a clamp 47. The end of the workpiece 42 is fed through the roller 41 to the beginning of the groove 40 and clamped with the end

lever lever 5. When the chuck 4 rotates, the spring produced is wound, the last support turn of which is pressed against the helical groove 40 by the sub-spring roller 44, which is mounted in the bracket 43 attached to the carriage body 10.

After the winding is completed, the roller 44 drops over the end of the last support coil of the spring in the same way as a similarly made roller attached to the headstock (not shown) drops over the start of the first support coil of the spring produced.

Turn off the rotational movement of the mandrel 9, release the end of the front support coil from the lever of the lever mechanism 5. The carriage 10 is bolted 19 with the apron 11 and turned off

the latch 47, allowing the caliper 3 to move along the bed 1. I

Air in the pneumatic cylinder 31 is supplied to the opposite cavity. The piston 34 moves out of engagement and the protrusion 37 of the retainer 36 with the cavity cavity 38 of the front part 8 of the mandrel 9, then through the cartridge 4 and the holder 23 to both parts 8 and 24

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the mandrels 9 communicate the opposite rotational movement in the direction of screwing the manufactured spring. The rotation of the spring is stopped, while parts of the mandrels rotate in the opposite direction. The spring stops due to the fact that the rollers 44 abut against the ends of the supporting turns: the springs move the latter away and facilitate its simultaneous removal from both parts of the mandrel 9. Simultaneously with the rotational movement of the rear part 24 of the mandrel 9, it synchronously rotates away from the front part 8 by activating the longitudinal feed of the caliper 3 from the spindle 12 through the spindle nut 13

Navita spring arrives at a calibrator (not shown), where the bearing coils are pressed and the required height is set. Made spring serves for heat treatment.

The technical and economic effect of using the proposed device consists in obtaining the possibility of mass production of springs with alternating turns of two different diameters, with a number of working turns of 3-3.5, most common on the rolling stock of railways, as well as in improving the quality of the product: approximately two times greater deflection and weight reduction, respectively, a reduction in the consumption of alloyed steel by 10–15% in each spring in comparison with springs of conventional design. An increase in spring deflection improves the dynamics of the base composition and improves the reliability of its operation.

Claims (3)

1. An apparatus for manufacturing cylindrical coil springs, comprising a headstock with a cartridge mounted on a frame, a feed unit of a wound material in the form of a caliper with a guide roller, and also a roller for pressing the end of the support 987 6 a coil, a two-part mandrel, a holder for the back of the mandrel, a rotational and translational mechanism for the holder and means for securing the mandrel to the chuck and the holder, characterized in that, in order to expand the technical possibilities by making springs alternating between About a coils of two different diameters, it is provided with a carriage with a rod placed on the caliper, mounted on the frame with a stand with a hole., On the surface of the mandrel is made screw 5, a groove of varying diameter, with parts of the mandrel aligned with a groove of a smaller diameter, and the mandrel provided with a locking mechanism for aligning the helical grooves of the parts of the mandrel, with the holder of the mandrel and The mechanism of rotational and translational movement of the holder is placed on the support carriage, and the rod of the carriage is placed in the opening of the rack with the possibility of its fixation relative to the rack. 2. A non.l device, characterized in that the carriage  placed on the caliper with the possibility of longitudinal movement and fixation by means of rollers mounted in the carriage and clamping screws placed in the caliper and carriage. 35 3. The device according to claim 1, 1 and 2, and the fact that the roller for pressing the end of the support coil is placed on the carriage and spring-loaded, and the device is equipped with a similar roller, 40 installed on the headstock mouth- roystva 4, The device according to claim 1, characterized in that the fixation mechanism is placed inside the parts of the frame 45 and is made in the form of a cylindrical lock with a protrusion placed in the cavity of the parts of the mandrel in which the response groove is made, while the lock is rigidly connected to the power piston thereto cylinder. Zfi LL srig, g Editor E. Sligan Compiled by A. Ksenofontov Tehred V. Kadarcorrector M.Sharoshi Order 2557 / il Circulation 582 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 FIG.