Claims
- 1. An apparatus for lubrication of cutting tools and removal of cutting chips without scratching or lubricating the surface of the workpiece, comprising:
- an enclosure defining a cavity within said enclosure;
- a first axial opening at the top of the enclosure opening into said cavity for passage of a cutting tool;
- a second axial opening at the bottom of said enclosure opening into said cavity, said second axial opening being axially aligned with said first axial opening;
- a blowing port in one side of said enclosure communicating with said cavity;
- a source of pressurized air and mist lubrication having a nozzle aligned with said blowing port for blowing air and mist lubrication into said cavity;
- a vacuum port on another side of said enclosure communicating with said cavity and adapted to be connected with a source of suction with greater flow capacity than said pressurized air source flow capacity, whereby said cavity will be at a negative pressure relative to the outside air pressure and said air and mist lubrication will be drawn through said cavity past and around said cutting tool, and then out said vacuum port without contacting said workpiece, and said chips from said cutting tool will be drawn out through said vacuum port without landing on or marring said workpiece surface.
- 2. The apparatus defined in claim 1, further comprising:
- a pressure foot connected adjacent the bottom of said enclosure, said pressure foot having an axial opening therethrough for passage of said cutting tool; and
- means for pressing said pressure foot against a workpiece to hold said workpiece stationary with respect to the plane normal to said cutting tool axis, and to prevent cutting chips from escaping from said cavity.
- 3. The apparatus defined in claim 2, wherein:
- said cavity is tapered downwardly at the bottom thereof, and said pressure foot axial opening is tapered downwardly, said cavity and pressure foot tapers being sized to form a smooth continuous taper from said cavity to the bottom surface of said pressure foot, and said axial opening in said pressure foot at said bottom surface thereof is just slightly larger than said cutting tool;
- whereby cutting chips have no place to land in said smoothly tapered cavity and are swirled by said pressurized air and are sucked quickly out of said vacuum port without substantial contact with the surface of the workpiece.
BACKGROUND OF THE INVENTION
This is a division of U.S. application Ser. No. 07/632,445 filed on Dec. 21, 1990 and entitled "Drill/Rivet Machine".
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4037982 |
Clement |
Jul 1977 |
|
5033917 |
McGlasson et al. |
Jul 1991 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
632445 |
Dec 1990 |
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