Method for making double-cone furniture springs (variants)

FIELD: manufacture of springs, possibly for furniture, particularly manufacture of springy mattresses for soft furniture.

SUBSTANCE: method comprises steps of feeding round cross section wire; forming and binding knots on supporting turns due to twisting wire end under predetermined pressure around supporting turn; before forming spring blank, imparting to wire out-off-round cross section or making spring blank from wire having out-off-round cross section. When wire end portion is twisted around supporting turn in contact zone of twisted wire and wire of supporting turn recesses are formed on portions of supporting turn wire having positive deflection from out-off-roundness due to creation of pressure exceeding preset value. Twisted wire is pressed-in to said recesses.

EFFECT: enhanced strength of knots, increased useful time period of spring, operational reliability of articles.

2 cl

 

The invention relates to the manufacture of springs and can be used in the furniture industry in the manufacture of spring mattresses upholstered furniture.

Known complex for the manufacture of spring blocks (A.S. No. 1613229, MKI 21 F 27/16, publ. 15.12.90, bull. No. 46) - [1]used in the furniture industry. The complex contains a spring-coiling machine, on the basis of which the course of the process has been consistently found the unwinding device, the correct device, the winding mechanism biconical springs mechanisms to tie knots on the upper and lower ends of the springs, a device for heat treatment, the plunger and restposition rotary manipulator for gripping springs and move them between machines.

One of the operations in the manufacture of springs is the spin of the nodes on the base turns of the spring, which determines the quality and shape of the spring.

A known way of twisting node furniture springs (A.S. No. 457521, MKI 21 F 35/02, publ. 25.01.75, bull. No. 3), [2], namely, that the harvesting of the spring is fixed, separate reference coil, is formed into a knot by twisting the wire end on the supporting stage, and before tightening on the reference orbit form a spiral groove.

A device for education site on the supporting coil springs (A.S. No. 476065, MKI 21 F 35/02, publ. 05.07.75, bull. No. 25) - [3], which sod is RIT located on one side of the plot, on which node is formed, the rotating gear mounted on its end face forming strap, thibaudia the free end of the wire, and on the other side of the mentioned plot the conductor and the bar for fastening the supporting coil springs, adjustable knife mounted on the end of gears, and the conductor for fixing the spring is mounted on a shaft that can be rotated around it.

A device for education site on the supporting coil springs (A.S. No. 996012, MKI 21 F 35/02, publ. 15.02.83, bull. No. 6) - [4], containing the drive gear with a radial groove and bending strap on the end, coaxially installed the gear cone with a groove for guiding the reference coil springs, and the conductor bar for fixing the supporting coil springs, while on the surface bending of the strap in place pairing it with the end surface of the gear made the groove is folded around the end of spring.

A known method of manufacturing a double conical springs, implemented in a machine for the production and heat treatment biconical springs adopted for the prototype to conduct a comparative analysis with the claimed as an invention (the Manual. Part 1. Machine for the production and heat treatment biconical springs model A, Azov plant forging machines, 1983) - [5].

The process of manufacture is of double conical springs is as follows: the wire from the coil unwind, rule and serves rollers of a given length to dinitroanisole and Samoobrona mechanisms driven from Kulakov, where a workpiece double-cone springs. After a power supply is wrapped around the workpiece springs cut, grip the claws of the transport of the rotor and serves to tying arrangements, where curl nodes on the reference coils, next to the mechanism of heat treatment and the mechanism of the packaging, where the package of a spring clean in the container.

Spring must comply with the requirements of technical conditions: they are made of wire of circular cross section, the connection node of the wire end with a support coil must be stationary during the application of a force in 6-8 Dan (Technical specifications for component parts of soft furniture elements, JSC “all-Russian design and technological Institute for furniture” - VPKTIM, Moscow, 1995) - [6].

In the method adopted for the prototype, in the manufacture of spring wire of circular cross section with twist knot by twisting the wire end on the supporting stage set pressure at the contacts is the same around the node.

The disadvantage of this method is the lack of strength that is bound up node that leads to the displacement of the node at the reference coil during operation of the product, disturbed the size of the reference coil, the product loses its shape and not the required performance.

The technical result, which is aimed by the invention, is to increase the strength of the fastened host by preventing its movement in the reference coil that provides the reliability and durability of the products that use double-cone springs.

The technical result (1st option) is achieved in that in the method of manufacturing a double conical springs for furniture, comprising a wire of circular cross section, forming and joining of nodes on the supporting turns by winding a wire end to a set pressure on the supporting stage, before the forming of the billet spring wire give a non-circular cross-section and tightening the wire end on a supporting turn in contact spinning wire and wire supporting a coil on the wire sections of the reference coil with a positive deviation from the circular cross-section due to pressure is greater than the specified form recesses into which is pressed replace the wire.

The technical result (2nd option) is achieved in that in the method of manufacturing a double conical springs for furniture, comprising a wire feeding, forming and joining of nodes on the supporting turns by winding a wire end to a set pressure on the supporting stage, shaping procurement and spring lead wire of noncircular cross section, and tightening the wire end on a supporting turn in contact spinning wire and wire supporting a coil on the wire sections of the reference coil with a positive deviation from the circular cross-section due to pressure is greater than the specified form recesses into which is pressed replace the wire.

To implement the proposed method can be used in a machine for making double conical springs - [5].

To implement the method according to the first embodiment, before forming the workpiece springs are deformation (flattening) of wire of circular cross section, for example, an additional system of squeeze rollers, receiving a wire of noncircular cross section.

For implementing the method according to the second variant uses a wire with deformed cross-section (wire of noncircular cross section).

Tightening the knot on the wire of noncircular cross section in contact spinning wire and wire reference coil pressure in places with a positive deviation from the circular cross-section and in places with a negative deviation from the circular cross-section varies. When subjected to replace the wire set pressure at the contacts spinning wire and wire supporting a coil with a positive deviation from the circular cross-section occurs, previsani the pressure from the set, what creates the places of contact cavities, into which is pressed replace the wire, locking the node.

Thus, the proposed method of manufacturing a double conical springs provides solid and reliable in operation the spring.

1. A method of manufacturing a double conical springs for furniture, comprising a wire of circular cross section, forming and joining of nodes on the supporting turns by winding a wire end to a set pressure at the reference coil, wherein before the forming of the billet spring wire give a non-circular cross-section and tightening the wire end on a supporting turn in contact spinning wire and wire supporting a coil on the wire sections of the reference coil with a positive deviation from the circular cross-section due to pressure is greater than the specified form recesses into which is pressed replace the wire.

2. A method of manufacturing a double conical springs for furniture, comprising a wire feeding, forming and joining of nodes on the supporting turns by winding a wire end to a set pressure at the reference coil, characterized in that the shaping of the workpiece, the spring lead wire of noncircular cross section, and tightening the wire end on a supporting turn in contact spinning is Revoluci and a wire supporting a coil on the wire sections of the reference coil with a positive deviation from the circular cross-section due to pressure exceeds the specified value are formed recesses, in which is pressed replace the wire.



 

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FIELD: medical technique.

SUBSTANCE: apparatus includes base supporting guides and carriage mounted with possibility of motion along guides. Rotary platform is mounted on base behind horizontal guides of carriage. On one edge of platform there is opening in which vertical shaping pin is arranged. Said pin is secured to base. On other edge of platform there is indicator of platform rotation angle. Guiding tube is mounted between said edges and pressing spring if arranged in parallel relative to said tube with possibility of axial motion. Adjusting and pressing screws are mounted respectively at both ends of said spring. Carriage includes clamping mechanism and handle moving carriage on guides. Member for controlled limitation of horizontal motion of carriage is mounted on base between horizontal guides of carriage.

EFFECT: possibility for simplified forming of curvilinear profile of distal part of bowden.

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FIELD: medical technique.

SUBSTANCE: apparatus includes base supporting guides and carriage mounted with possibility of motion along guides. Rotary platform is mounted on base behind horizontal guides of carriage. On one edge of platform there is opening in which vertical shaping pin is arranged. Said pin is secured to base. On other edge of platform there is indicator of platform rotation angle. Guiding tube is mounted between said edges and pressing spring if arranged in parallel relative to said tube with possibility of axial motion. Adjusting and pressing screws are mounted respectively at both ends of said spring. Carriage includes clamping mechanism and handle moving carriage on guides. Member for controlled limitation of horizontal motion of carriage is mounted on base between horizontal guides of carriage.

EFFECT: possibility for simplified forming of curvilinear profile of distal part of bowden.

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FIELD: manufacture of springs, possibly for furniture, particularly manufacture of springy mattresses for soft furniture.

SUBSTANCE: method comprises steps of feeding round cross section wire; forming and binding knots on supporting turns due to twisting wire end under predetermined pressure around supporting turn; before forming spring blank, imparting to wire out-off-round cross section or making spring blank from wire having out-off-round cross section. When wire end portion is twisted around supporting turn in contact zone of twisted wire and wire of supporting turn recesses are formed on portions of supporting turn wire having positive deflection from out-off-roundness due to creation of pressure exceeding preset value. Twisted wire is pressed-in to said recesses.

EFFECT: enhanced strength of knots, increased useful time period of spring, operational reliability of articles.

2 cl

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