CNC machine cutting fluid discharging tool accessory
A tool accessory used to apply different volumes of a cutting fluid to the tap under CNC control by causing the machine to undergo different pump cycles in which the rotational speed of the tool is increased above the tapping rotated and then quickly returned to the tapping rotation. The tool includes a tapping head, a reservoir filled with cutting fluid, a centrifugal force-reactive pump and at least two discharge nozzles. The pump includes a plurality of biased piston springs that are forced outward and store centripetal force when the tool is rotated at speeds above normal tapping speed. When the rotational speed of the tool is reduced, the piston springs overcome the centrifugal forces and force cutting fluid through the discharge nozzles. The volume of cutting fluid discharged is controlled by adjusting the viscosity of the cutting fluid, the tool's maximum speed, by using different size discharge nozzles, and by using different pump cycles.
1. A cutting fluid discharge tool accessory, comprising:
a. a reservoir body with an axially aligned shank and an inside cavity filled with cutting fluid; and,
b. a pump assembly aligned below and attached to said reservoir body, said pump assembly includes a pump body attached to said reservoir body and at least one discharge nozzle, said pump body includes a piston cavity and a pump located therein that includes a biased swing arm configured to pivot in one direction and draw cutting fluid into said piston cavity when the rotation speed is greater than a rotation speed needed for tapping, and pivot in the opposite direction forcing said cutting fluid from said piston cavity and into said discharge nozzle when said tool rotates at a rotation speed needed for tapping, said pump assembly includes a cutting tap mounting surface configured to attach to a cutting tap that includes a tip located below said pump assembly, said discharge nozzle assembly includes a discharge nozzle aimed towards said tip cutting tap.
2. The tool accessory, as recited in claim 1 wherein said discharge nozzle is attached to a nozzle bore formed on said pump body.
3. The tool accessory, as recited in claim 1 wherein said swing arm is pivotally attached to said pump assembly and includes a weight and an end that presses against said spring biased piston, when said tool is sufficiently rotated above the tapping speed, said swing arm rotates and allows a compression spring to push said piston move longitudinally inside said piston cavity and draw cutting fluid into said piston cavity, but when said tool is rotated at said tapping speed, said swing arm returns to its original position and said piston is pushed longitudinally inside said piston cavity and forces cutting fluid through said discharge nozzle.