Gear cutting tool, gear machining device, and gear machining method
AssigneeJtekt Corporation
InventorsKazuki Natsuda, Hisashi Otani, Hiroyuki Nakano, Yoshimitsu Okada
Life of this patent
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Abstract
To provide a gear cutting tool capable of supplying a coolant liquid to an optimum position even when cutting edges are reground. The gear cutting tool includes the tool body having a plurality of blades on an outer peripheral surface thereof and a center hole, and a nozzle provided in the center hole of the tool body so that a fixed position in the tool body is adjustable. The nozzle includes a flow channel which allows supplied coolant liquid to flow into the center hole of the tool body, and discharge the coolant liquid toward the plurality of blades.
Claims4
A gear cutting tool used for machining a gear, comprising:
- a tool body including a plurality of blades on an outer peripheral surface thereof, a recessed portion on a distal end, and a center hole opening to the recessed portion;
- and
- a nozzle including a flow channel allowing a coolant liquid supplied to the center hole of the tool body to flow therein and discharging the coolant liquid toward the plurality of blades and provided in the center hole of the tool body so that a fixed position thereof in the tool body is adjustable,
- wherein the nozzle includes a shaft portion and a head portion having a diameter greater than the shaft portion,
- wherein a part of the head portion protrudes beyond an opening of the recessed portion in an axial direction,
- wherein the entire flow channel, from an inlet of the nozzle in the shaft portion where the coolant liquid enters the nozzle to an outlet of the nozzle in the part of the head portion protruding beyond the opening of the recessed portion where the coolant liquid exits the nozzle, is moved when the fixed position of the nozzle in the tool body is adjusted,
- wherein at least a portion of the outlet of the nozzle forming the entire flow channel protrudes beyond the opening of the recessed portion,
- wherein the center hole includes a female screw portion,
- wherein the recessed portion has a diameter larger than that of the female screw portion,
- wherein the tool body includes a mounting seat formed in a periphery of an opening of the center hole of the tool body,
- wherein the shaft portion is fastened in a state of being inserted into the center hole of the tool body, and includes a first flow channel extending in the axial direction as part of the flow channel,
- wherein the head portion is provided at an end of the shaft portion, is provided outside the opening of the center hole of the tool body, and includes a second flow channel discharging the coolant liquid flowed into the first flow channel radially outward as another part of the flow channel,
- wherein the gear cutting tool includes a spacer interposed between the mounting seat and the head portion in the axial direction,
- wherein the nozzle is provided in the center hole of the tool body so that the fixed position thereof in the tool body is adjustable by the spacer, and
- wherein the second flow channel discharges the coolant liquid directly toward the plurality of blades.
Dependencies are inferred from the claim text.