Plate-link chain and method for producing it
A plate-link chain including plates having at least one ear, and rocker pressure members interconnecting the plates. The wear of chain guide tracks or guide rails during movement of the plate-link chain relative to the guide tracks or guide rails is reduced by removing the ears from the plates after the plate-link chain is assembled. The ear removal is effected by machining or grinding off the ears.
1 . A plate-link chain comprising: a plurality of link plates including an opening positioned interiorly of an outer periphery, wherein the outer periphery includes at least one outwardly-extending ear; a plurality of rocker pressure members extending through respective plate openings for interconnecting the plates in side-by-side relationship in a predetermined plate pattern, wherein the at least one outwardly-extending ear is removed after assembly of the plate-link chain by the interconnection of the link plates and the rocker pressure members.
2 . A method for producing a plate-link chain that includes a plurality of link plates having at least one outwardly-extending ear extending from an outer periphery of the link plates, and a plurality of rocker pressure members interconnecting the link plates, said method comprising the steps of:
assembling the link plates and the rocker pressure members by interconnecting the link plates and rocker members to form a plate-link chain in which the link plates are positioned in side-by-side relationship in a predetermined link plate pattern; and
removing the outwardly-extending ears after assembly of the plate-link chain but before placing the chain into service.
3 . A method in accordance with claim 2 , wherein removal of the ears is effected by machining the ears to provide substantially flat and parallel edges of correspondingly-positioned outer surfaces of the link plates.
4 . A method in accordance with claim 3 , wherein the machining is effected by grinding the ears.
5 . A method in accordance with claim 4 , wherein the grinding of the ears includes at least one of wet and dry grinding of the ears.
6 . A method in accordance with claim 5 , wherein metallic particles are removed from ear regions during an ear machining operation.
7 . A method in accordance with claim 6 , including the step of subjecting a region adjacent to the ears to a magnetic field to remove metallic particles generated during ear grinding.
8 . A method in accordance with claim 6 , including the step of flowing a fluid medium in a region adjacent to the ears to remove metallic particles generated during ear grinding.
9 . A method in accordance with claim 3 , wherein the machining depth is performed to avoid property-altering heat treating of the link plates and the rocker members during machining of the ears.
10 . A method in accordance with claim 2 , including the step of applying in a longitudinal direction of the plate-link chain a tensile stretching force after removal of the ears.
11 . A method in accordance with claim 3 , including the step of removing machining debris from adjacent the ears before placing the chain in service.
12 . A method in accordance with claim 11 , wherein the machining debris removal step is performed by subjecting the ears to the flow of a flowing cleaning fluid.
13 . A method in accordance with claim 8 , wherein the fluid medium is a liquid.
14 . A method in accordance with claim 8 , wherein the fluid medium is pressurized air