Portable precision drill
AssigneeJohannes Lübbering GmbH
InventorJohannes Lubbering
Life of this patent
Estimating the term…
Abstract
A drill incorporates an axial feed drive, measuring system for determining the feed distance, a computer for controlling the axial feed drive as a function of the axial feed distance and a rotary drive for driving the tool spindle with pre-established on-load speed or pre-established torque or load moment. The flow or feed of cutting lubricant to the tool is controlled as a function of the pre-established on-load speed or the combination of the pre-established load moment, and the axial feed.
Claims20
A portable drill for performing drill operations on a workpiece comprising:
- a frame;
- a tool spindle displaceably mounted on said frame;
- feed drive means mounted on said frame and connected to said tool spindle for displacement of said tool spindle;
- rotary drive means for rotation of said tool spindle;
- measurement system means mounted on said frame;
- depth sensor means mounted on said measurement system means for detecting feed distance of said tool spindle;
- computer means mounted on said frame for regulating said feed drive means with said computer means connected to said rotary drive means and to said feed drive means for the purpose of regulating said feed drive means as a function of decrease in speed of said rotary drive means during operation with a decrease in said feed drive speed corresponding to a decrease in said rotary drive speed;
- axially displaceable feeler nose means disposed generally para-axially with respect to said tool spindle for the purpose of making contact with said workpiece for detecting a reference portion of said workpiece;
- and
- lubricant feeding means mounted on said frame for feeding lubricant as a function of said rotary drive speed.
A portable drill for performing drill operations on a workpiece comprising:
- a frame;
- a tool spindle displaceably mounted on said frame;
- feed drive means mounted on said frame and connected to said tool spindle for displacement of said tool spindle;
- rotary drive means for rotation of said tool spindle;
- measurement system means mounted on said frame;
- depth sensor means mounted on said measurement system means for detecting feed distance of said tool spindle;
- computer means mounted on said frame for regulating said feed drive means, with said computer means connected to said rotary drive means and to said feed drive means for the purpose of regulating said feed drive means as a function of decrease in speed of said rotary drive means during operation, with a decrease in said feed drive speed corresponding to a decrease in said rotary drive speed;
- axially displaceable feeler nose means disposed generally para-axially with respect to said tool spindle for the purpose of making contact with said workpiece for detecting a reference portion of said workpiece;
- and
- lubricant feeding means mounted on said frame for feeding lubricant as a function of load moment and feed distance.
Dependencies are inferred from the claim text.