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US RE35,106 EGranted
Method for manufacturing a rail for use in a linear motion rolling contact guide unit
AssigneeNippon Thompson Co., Ltd.
InventorsYasumasa Ohya, Koji Kano
Life of this patent
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Abstract
A method for manufacturing a rail for use in a linear motion rolling contact guide unit is provided. A rail intermediate product having a top surface, a pair of side surfaces, each formed with a guide groove portion, and a bottom surface is provided by drawing from an alloy steel material. Then the guide groove portion is hardened by induction hardening. The side surface is then ground by a profiled grinder having a grinding shape complementary to the shape of a side surface of a finished rail.
Claims4
A method for manufacturing a rail for use in a linear motion rolling contact guide unit, comprising the steps of:
- providing a rail intermediate product having a top surface, a pair of side surfaces and a bottom surface by drawing a metal material, such that each of said side surfaces is formed with a guide groove portion extending in parallel with a longitudinal axis of said rail intermediate product;
- first hardening said guide groove portion;
- and
- then grinding each of said side surfaces in its entirety using a profiled grinder having a grinding shape complementary to a shape of a finished side surface of said rail, which includes a tapered relief trench at a bottom thereof.
1 more element
Dependencies are inferred from the claim text.