DD200558A1 - METHOD AND DEVICE FOR PRODUCING SCREW PRESSURE SPRINGS - Google Patents

Abstract

The invention relates to a method and an apparatus for producing helical compression springs. The goal is a technologically optimal production process. For this purpose, the manufacturing processes must be summarized accordingly. Erfindungsgemaesz the object is achieved by the fact that after winding a spring assembly on the winding mandrel a cutting or thermally separating planing and simultaneous separation of the springs from the spring assembly and spring ends on suitable receiving devices, which optionally followed by a deburring. The invention can be used in particular for the production of heavy coil springs.

Description

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Method and device for producing so-called compression springs

Field of application of the invention

The invention relates to a method and an apparatus for producing helical compression springs, in particular heavy helical compression springs.

Characteristic of the known technical solutions

Helical compression springs are usually made by winding spring wire rods on rotating winding shafts with program different gradients including the automatic application of the spring ends.

It is known to wind helical compression springs with molded Pederenden. The shaping, e.g. Tensioning rollers or forging, a complex operation, combined with the need for manpower, investments and work surfaces, wherein the molded Pederenden during machine winding process must be additionally manually position corrected.

Next, the surface grinding and deburring the Pederenden associated with considerable handling.

It is also known to clamp the helical compression springs for plan machining on lathes individually on expanding mandrels or in three-jaw chuck.

Pur small springs, it is known to wrap them endlessly and then using knives or, "as in the DR-PS 60 808

-1.0KT.1981 * iH> 330U

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described, with a rotating blade disc to separate.

Object of the invention

The aim of the invention iat a technologically better manufacturing process for the production of helical compression springs by the replacement of the surface grinding in the cutting spring end processing, u.a. as a prerequisite for detachment of the molding of the spring rod ends without substantial increase in the abzuspanenden material volume and thus as a prerequisite for the elimination of the additional alignment rolled out spring rod ends during spring winding.

Explanation of the essence of the invention

The invention has for its object to provide a method and apparatus for producing helical compression springs, in particular heavy helical compression springs by winding spring wire on a winding mandrel, in which the compression coil springs can be optimally manufactured by combining the manufacturing processes to corresponding processing sequences.

According to the invention the object is achieved in that after winding a spring assembly on the mandrel with desired pitch and applied, not formed spring ends a cutting or thermally separating plan processing and simultaneous separation of the springs from the spring assembly and the spring end remains from the spring ends. If necessary, deburring follows *

The inventive device has a rotating receiving device for the spring assembly and a separation unit with a plurality of spaced apart and offset by a control device or at the same time against the spring assembly movable, cutting or thermally separating tools that rotate or stand in co-rotation or mating.

The cutting tools can cut-off wheels, milling cutters)

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Saws or turning steels. The thermally-isolating tools may be fuel gas suicidal sneeze burners or plasma cutters. As a receiving device, the winding mandrel or an expanding mandrel or a roll group can be used.

embodiment

The invention will be explained in more detail below with reference to an exemplary embodiment.

In the accompanying drawing show

Pig. 1: the basic representation of the method with winding mandrel;

Pig. 2: the device with an expanding mandrel; Pig. 3: the device with roller group.

After Pig. 1, a spring assembly 1 is arranged on a receiving device 4. The spring assembly 1 is provided according to the requirements with a slope or has areas corresponding to spring ends 3.

Against the rotating receiving device 4, cutting or thermally separating tools 6, such as cut-off wheels, Preser, saws, turning steels or fuel gas Sauerst from cutting torch or plasma melt cutting, led. The distance between these tools 6 corresponds to the length of the springs to be produced 2. There is a burning of the springs to be produced by the spring assembly 1 and a plan processing of the springs. 2

According to Fig. 2, the receiving device 4 is an expanding mandrel and the tool 6 is formed by a separation unit 5. The separation unit 5 has a base 9 »on which a cross slide 8 is slidably disposed. The tools 6 are held by a drive block 7.

When receiving through a group of rollers, as shown in Fig. 3, the spring assembly 1 is between two driven rollers 10 and a height-adjustable clamping

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Roller 11, wherein the adjustment to the Werkstüekdurchmesser and the transmission of rotation to the workpiece by the driven rollers 10 takes place and the radial clamping force is applied by the tension roller 11.

Claims (6)

-23,386 1 Invention claim 1. A method for producing helical compression springs, in particular heavy helical compression springs, by winding spring wire on a winding mandrel, characterized in that after winding a spring assembly (1) on the winding mandrel with desired pitch and applied, not formed spring ends (3) has a chipping or thermally separating plan processing and simultaneous separation of the springs (2) from the spring assembly (1) and the spring end remnants of the spring ends (3) on suitable Aufnähmevorrichtungen (4), which optionally followed by a deburring. 2. Apparatus for carrying out the method according to item 1, characterized in that a rotating receiving device (4) for the spring assembly (1) a separation unit (5) with a plurality of spaced-apart and offset by a control device or at the same time against the spring assembly (1) movable, cutting or thermally separating tools (6) which rotate or are fixed in the same or in opposite directions » 3 * Device according to Pkt. 1 and 2, characterized in that the cutting tools (6) Trennsehleifscheiben, milling cutters, saws or turning steels and that the thermally-separating tools are fuel gas Saueratoff cutting torch or plasma melt cutter. 4 · Device according to item 1 ^ i " ³ 3, characterized in that the receiving device (4) is the winding mandrel. 5. Apparatus according to item 1 to 3, characterized in that the receiving device (4) is an expanding mandrel. 6. Device according to item 1 to 3, characterized in that the receiving device (4) consists of a roller group.