초록 ▼

Strip feeding mechanism intended for use in a stamping and forming machine comprises an intermittently rotated sprocket wheel which is located adjacent to the operating zone of the machine in which the stamping and tooling is located. The strip material is held against the periphery of the sprocket

Strip feeding mechanism intended for use in a stamping and forming machine comprises an intermittently rotated sprocket wheel which is located adjacent to the operating zone of the machine in which the stamping and tooling is located. The strip material is held against the periphery of the sprocket wheel by a retaining shoe so that the sprocket teeth will enter pilot holes in the strip and advance the strip during feeding intervals. During non-feeding intervals, the pilot pins which are part of the stamping and forming tooling, will adjust the position of the strip relative to the tooling performing the operation thereon. The construction of the biasing shoe and the sprocket wheel is such that the strip is not firmly held by the feeding mechanism and can be moved by a very slight amount by the pilot pins in order to position the strip precisely in the operating zone.

대표청구항 ▼

A machine, such as a stamping and forming machine, having an operating zone and having a feed sprocket adjacent to the operating zone for feeding strip material intermittently through the operating zone, sprocket actuating means for intermittently rotating the feed sprocket, the strip material havin

A machine, such as a stamping and forming machine, having an operating zone and having a feed sprocket adjacent to the operating zone for feeding strip material intermittently through the operating zone, sprocket actuating means for intermittently rotating the feed sprocket, the strip material having pilot holes therein at uniformly spaced intervals, the operating zone having pilot pins therein which are moved into the pilot holes in the portion of the strip which is in the operating zone during non-feeding intervals, the sprocket having sprocket teeth on the periphery thereof which are dimensioned to enter the pilot holes and which are spaced apart by the same amount as the pilot holes, the strip and the sprocket wheel having a tangency location at which the strip in tangent to the sprocket, the machine being characterized in that: the sprocket teeth are generally conical and have a base diameter which is substantially equal to, and less than, the diameter of the pilot holes, the sprocket actuating means is timed to locate one sprocket tooth at the tangency location during non-feeding intervals with the one tooth extending into a pilot hole, during non-feeding intervals, the sprocket teeth on each side of the one tooth are not in engagement with the strip, and retaining means are provided for retaining the strip against the sprocket wheel at the tangency location whereby, with the one sprocket tooth extending into the pilot hole, the retaining means permitting limited radial movement of the strip on the one tooth radially away from the periphery of the sprocket wheel upon movement of the pilot pins into the strip material during non-feeding intervals, the strip can be moved along its length by the pilot pins with accompanying movement of the strip laterally of its plane and radially away from the periphery of the feed sprocket.