One object of the invention is, in accordance with the preamble of claim 1, a coiling device for spring coiling machines, having exchangeable elements that contain adjusting screws, whereby each coiling pin is mounted in a receptacle so as to rotate therewith and so as to be able to rotate therein about its longitudinal axis after a clamping screw is loosened, and to be capable of moving in its longitudinal direction by means of a set screw, and whereby each coiling pin receptacle is mounted in or on a coiling pin holder, by means of which the coiling pin held in the receptacle can be pivoted in a controlled manner by means of set screws, and can be changed in position by means of an adjusting slide that mounts the coiling pin holder, by means of at least one set screw. One or two such coiling devices are preset in one finger or two finger spring coiling machines to produce helical springs from endless wire.
Another object of the invention is, in accordance with the preamble of claim 10, an adjusting device for coiling tools on spring coiling machines having a coiling device, for example of the above-described type, having an adjustable tool receptacle in which a coiling tool is mounted so as to be adjustable by means of a set screw in the direction of its longitudinal axis that crosses the longitudinal axis of the spring to be produced; having a tool holder that carries the tool receptacle, which is mounted thereon so as to be capable of being rotated by means of a pair of set screws supported on both sides of the tool on the tool holder; and having an adjustment slide that can be mounted laterally to the spring axis on which the tool holder is arranged so as to be capable of being pivoted about its longitudinal axis lying parallel to the spring axis by means of a bolt; whereby the tool holder is supported by means of a set screw on one side of its pivot axis on a device element that cannot slide.
With the aid of a suitable quick-clamp coiling pin holder and an adjusting device adapted therefor, the primary adjusting procedures should be able to be performed outside of the machine. This achieves an improved degree of utilization of the production machine, the reproducibility of a setting once attained, and machine servicing by less qualified personnel.
This is not possible with the presently known coiling systems, because for the most part they operate with holders that are permanently installed in the machine, and in which round coiling pins are inserted into a bore. By rotating about their own axes, these coiling pins can be brought into the necessary operating position and clamped in place. No type of adjusting aids are provided for this purpose, although it is precisely the locating of the correct angular position that has the greatest significance in the overall setting, and this requires well trained personnel.
Subsequent fine adjustments are almost a matter of luck in this system, because the clamp must first be released for any such attempt without the previous position being retained and therefore relocatable. A reproducibility of earlier settings is for this reason not possible, although particularly with spring coiling machines this should be extremely important for reasons of the degree of utilization, because spring production cannot begin until several test springs have completed all subsequent operational processes such as start-up, setting, grinding, deburring and force testing. This often means hours of waiting time for a machine intended for production. For extremely small or extremely large spring diameters, the coiling pins, the axes of which are normally parallel to the adjusting device of the slider supporting them, must be able to pivot. There are corresponding points of rotation in the known systems, but only for an uncontrolled adjustment.
The object of the invention, then, is to realize exchangeable coiling pin holders that can be preset outside of the machine in which the coiling pins can move in a controlled manner in rotation about their axes, and in moving in the direction of their longitudinal axes, as well as perpendicularly thereto. In addition, it must be possible to pivot the longitudinal axes of the coiling pins, which normally run parallel to the adjustment direction of the adjustment slide carrying the coiling pin holders, in the negative or positive angular range.
An adjustment device must make it possible to undertake the above-referenced four adjustments outside of the machine on the basis of the values obtained from the coil ratio and the wire thickness of the springs to be produced, whereby no unintentional changes may arise through the installation in the machine.
Because spring steel wire can fluctuate in its hardness and therefor in its coiling behavior, a controlled subsequent adjustment must be possible in the machine.