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US 4,402,204 AGranted
Wire coiling machine
AssigneeSleeper & Hartley Corp.
InventorsFrank S. Russell, Robert J. Simonelli
Life of this patent
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AssigneeSleeper & Hartley Corp.
InventorsFrank S. Russell, Robert J. Simonelli
Estimating the term…
A machine for coiling wire to form any one of a number of different size, type and configuration of coil spring and comprising a machine frame in which is mounted a driveshaft, intermediate shaft, camshaft, and feed roller shafts. At a work station of the machine appropriate coiling dyes are supported along with one or more cutters mounted adjacent thereto. The wire is fed to the work station via a pair of feed rollers driven at variable speed, preferably by means of an elliptical gear drive, wherein the feed speed is at a maximum during coiling and decreases to a minimum feed speed for cutting. Wire feed is synchronously interrupted at cutting by means of a cam arrangement that briefly disengaged the feed rollers. This variable speed drive enables a high duty cycle of operation and also enables start up (feed rollers engaging) at reduced speed so as to minimize wire distortion. In an alternate form of wire feed, instead of interrupting drive to the feed rollers by a cam arrangement, a clutch is used to briefly stop motion for cutting. A further feature of the machine is the capability of removal of cams from the camshaft with all cams remaining intact. In this way a set of cams can be later substituted to produce a particular spring construction without requiring constant cam adjustment.
In a wire coiling machine having a work station at which a coil spring or the like is formed and a pair of feed rollers between which the wire is fed, the improvement comprising;
In a wire coiling machine as set forth in claim 14 wherein said means defining a bearing surface includes bearing means for supporting one end of the cam shaft.
In a wire coiling machine having a work station at which a coil spring or the like is formed, means for feeding the wire to the work station and housing means having supported therein a camshaft having at least one cam secured thereto, said camshaft being coupled to a drive source by non-circular gear means, said camshaft being rotatably supported at opposite ends, the improvement comprising;
Dependencies are inferred from the claim text.