ROTARY CUTTER TOOL

• US 3,645,640 A
• Filed: 06/11/1970
• Issued: 02/29/1972
• Est. Priority Date: 06/11/1970
• Status: Expired due to Term

• Current Assignee: Michael F. Zukas
• Original Assignee: Michael F. Zukas
• Inventors: Zukas, Michael F.
• Primary Examiner(s): Dost, Gerald A.
• Application Number:
  US05/045,321
• Time in Patent Office: 628 Days
• Field of Search: 408/83,82,186,192,193,196,202,225,146
• US Class Current: 408/192
• CPC Class Codes: B23B 2251/50 Drilling tools comprising cutting inserts
• CPC Class Codes: B23B 5/16 for bevelling, chamfering, or deburring the ends of bars or tubes
• CPC Class Codes: B23B 5/167 Tools for chamfering the ends of bars or tubes
• CPC Class Codes: B23B 51/009 Stepped drills
• CPC Class Codes: Y10T 408/5584 Engaging surface axially advanced of tool-action
• CPC Class Codes: Y10T 408/8729 with work-engaging structure other than cutting edge
• CPC Class Codes: Y10T 408/9065 with central lead

Abstract

A tool assembly for boring, turning, countersinking, chamfering and facing workpiece comprising a generally cylindrical tool body with an axially extending tool slot for removably receiving a flat cutting blade. A tool driver connected to the tool body maintains rotational motion between the tool body and the workpiece. The tool body has a means for limiting depth of cut by the blade and a means for guiding the cutting blade. A blade holder in the tool body is normally retracted by a spring means so that the blade is sheathed in the body. The blade holder may be axially advanced in the tool body by relative axial movement of the tool driver and the tool body to project the cutting edge of the cutting blade, while the tool body is engaged with the workpiece for guiding the cutting blade.

Claims

1. A rotating tool assembly for machining a workpiece, comprising, a generally cylindrical tool body having an axial extending slot;

a cutting blade removably secured in said slot;

means for limiting axial depth of cut per revolution of said tool assembly by said blade; and

guide means for holding said tool body and said workpiece in mutually engaged relatively rotatably position and for guiding said blade in cutting said workpiece.

2. A tool assembly as defined in claim 1, further comprising screws means in said tool body for adjustably positioning said blade in said slot radially of said tool body.

3. A tool assembly as defined in claim 1, further comprising screw means in said tool body for adjustably positioning said blade in said slot longitudinally of said tool body.

4. A tool assembly as defined in claim 1, wherein said guide means comprise a stepped, generally conical configuration, with cylindrical sections for holding said tool body and said workpiece in a mutually engaged relatively rotating position.

5. A tool assembly as defined in claim 1, further comprising screw means in said tool body for adjustably positioning said blade in said slot radially of said tool body;

and further screw means in said tool body for adjustably positioning said blade in said slot longitudinally of said tool body.

6. A tool assembly as defined in claim 1 further comprising a tool driver operatively connected to said tool body for maintaining relative rotation between said tool body and said workpiece whereby said workpiece may be cut by said blade.

7. A tool assembly as defined in claim 6, further comprising a blade holder axially slidable in said tool body;

spring means in said tool body normally holding said blade axially retracted in said slot; and

means supporting said tool driver for axial movement with respect to said tool body, said blade holder being disposed for longitudinal movement in said slot by said tool driver against tension in said spring means to extend beyond said slot for cutting said workpiece.

8. A tool assembly as defined in claim 7, further comprising means adjustably engageable with said tool driver and positionable with respect to said tool body so as to determine the extent of axial movement of said tool driver, blade holder and blade with respect to said tool body.

9. A tool assembly as defined in claim 8, wherein said guide means comprise a stepped, generally conical configuration, with cylindrical sections for holding said tool body and said workpiece in a mutually engaged relatively rotating position.

10. A tool assembly as defined in claim 7 wherein said tool driver comprises a cylindrical shaft extending axially of said body, and said means for limiting axial depth of cut, includes a collar adjustably engageable on said shaft and positionable with respect to said tool body so As to determine the extent of axial movement of said tool driver, blade holder and blade with respect to said tool body.

11. A tool assembly as defined in claim 7, further comprising screw means in said tool body for adjustably positioning said blade in said slot radially of said tool body;

and further screw means in said tool body for adjustably positioning said blade in said slot longitudinally of said tool body.