Cutting and deburring tool

Patent metadata

Field	Value
Publication number	US-10328500-B2
Application number	US-201715668323-A
Country	US
Kind code	B2
Filing date	Aug 3, 2017
Priority date	Aug 3, 2017
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

A cutting and deburring tool according to some embodiments of the disclosure includes a body portion configured to cut a hole in the workpiece, and a workpiece engaging portion and a shaft extending therefrom. The body portion includes a cutting edge configured to cut a hole in a workpiece and deburring cutting edges configured to deburr a first edge of a hole of a workpiece when the body portion is rotated in a clockwise direction or in a counter-clockwise direction after the hole is cut by the body portion. In some embodiments, a second body portion is provided and includes deburring cutting edges configured to deburr a second, opposite edge of the hole when the body portions are rotated in rotated in the clockwise direction or the counter-clockwise direction after the hole is cut by the first body portion.

First claim

What is claimed is:

1. A cutting and deburring tool comprising:
a front end, a rear end, a length defined between the front and rear ends, and a central axis defined therebetween around which the cutting and deburring tool is configured to be rotated;
a tip at the front end;
a body portion extending from the tip, the body portion having a flute having first and second flute edges extending along the body portion thereby forming a body section, one of the flute edges being configured to cut a hole in the workpiece,
the flute further comprising first and second deburring cutting edges extending from rear ends of the flute edges and a deburring guide surface extending between the first and second deburring cutting edges, the deburring cutting edges extending in a generally axial direction and being configured to deburr a first edge of the hole of the workpiece;
a workpiece engaging portion comprising a cylindrical portion extending rearwardly directly from the deburring guide surface; and
a shank extending from the workpiece engaging portion.

2. The cutting and deburring tool of claim 1 , wherein the deburring guide surface is angled relative to the central axis at an angle of approximately 110 degrees to approximately 130 degrees.

3. The cutting and deburring tool of claim 1 , wherein the body section includes a plurality of steps.

4. A cutting and deburring tool comprising:
a front end, a rear end, a length defined between the front and rear ends, and a central axis defined therebetween around which the cutting and deburring tool is configured to be rotated;
a tip at the front end;
a body portion extending from the tip, the body portion having a flute having first and second flute edges extending along the body portion thereby forming a body section, one of the flute edges being configured to cut a hole in the workpiece,
the flute further comprising first and second deburring cutting edges extending from rear ends of the flute edges and a deburring guide surface extending between the first and second deburring cutting edges, the deburring cutting edges extending in a generally axial direction and being configured to deburr a first edge of the hole of the workpiece;
a workpiece engaging portion extending rearwardly of the body portion;
a shank extending from the workpiece engaging portion; and
a rear body portion provided between the workpiece engaging portion and the shank, the rear body portion including first and second deburring cutting edges separated from each other by a flute and a deburring guide surface extending between the first and second deburring cutting edges of the rear body portion, the deburring cutting edges of the rear body portion extending in a generally axial direction and being configured to deburr a second edge of the hole of the workpiece.

5. The cutting and deburring tool of claim 4 , wherein the flute of the rear body portion aligns with the flute of the first defined body portion.

6. The cutting and deburring tool of claim 4 , wherein the workpiece engaging portion comprises a cylindrical portion.

7. The cutting and deburring tool of claim 6 , wherein the workpiece engaging portion further comprises a flat which is aligned with the flute of the body portion.

8. The cutting and deburring tool of claim 1 ,
wherein each flute edge is defined by a radial rake angle,
the first deburring cutting edge is defined by an axial rake angle and a radial rake angle,
the radial rake angle of the first flute edge is constant along the length of the flute and is the same as the radial rake angle of the first deburring cutting edge,
the second deburring cutting edge is defined by an axial rake angle and a radial rake angle,
the radial rake angle of the second flute edge is constant along the length of the flute and is the same as the radial rake angle of the second deburring cutting edge.

9. A cutting and deburring tool comprising:
a front end, a rear end, a length defined between the front and rear ends, and a central axis defined therebetween around which the cutting and deburring tool is configured to be rotated;
a tip at the front end;
a body portion extending from the tip, the body portion having a flute having first and second flute edges extending along the body portion thereby forming a body section, one of the flute edges being configured to cut a hole in the workpiece,
the flute further comprising first and second deburring cutting edges extending from rear ends of the flute edges and a deburring guide surface extending between the first and second deburring cutting edges, the deburring cutting edges extending in a generally axial direction and being configured to deburr a first edge of the hole of the workpiece;
a workpiece engaging portion extending rearwardly of the body portion; and
a shank extending from the workpiece engaging portion,
wherein each flute edge is defined by a radial rake angle,
the first deburring cutting edge is defined by an axial rake angle and a radial rake angle,
the radial rake angle of the first flute edge is constant along the length of the flute and is the same as the radial rake angle of the first deburring cutting edge,
the second deburring cutting edge is defined by an axial rake angle and a radial rake angle,
the radial rake angle of the second flute edge is constant along the length of the flute and is the same as the radial rake angle of the second deburring cutting edge, and
wherein the radial rake angle defining the first flute edge and the first deburring cutting edge is different than the radial rake angle defining the second flute edge and the second deburring cutting edge.

10. A cutting and deburring tool comprising:
a front end, a rear end, a length defined between the front and rear ends, and a central axis defined therebetween around which the cutting and deburring tool is configured to be rotated;
a tip at the front end;
a body portion extending from the tip, the body portion having a flute having first and second flute edges extending along the body portion thereby forming a body section, one of the flute edges being configured to cut a hole in the workpiece,
the flute further comprising first and second deburring cutting edges extending from rear ends of the flute edges and a deburring guide surface extending between the first and second deburring cutting edges, the deburring cutting edges extending in a generally axial direction and being configured to deburr a first edge of the hole of the workpiece;
a workpiece engaging portion extending rearwardly of the body portion; and
a shank extending from the workpiece engaging portion,
wherein each flute edge is defined by a radial rake angle,
the first deburring cutting edge is defined by an axial rake angle and a radial rake angle,
the radial rake angle of the first flute edge is constant along the length of the flute and is the same as the radial rake angle of the first deburring cutting edge,
the second deburring cutting edge is defined by an axial rake angle and a radial rake angle,
the radial rake angle of the second flute edge is constant along the length of the flute and is the same as the radial rake angle of the second deburring cutting edge, and
wherein the radial rake angle defining the first flute edge and the first deburring cutting edge is between approximately 10 degrees and approximately 35 degrees, and the radial rake angle defining the second flute edge and the second deburring cutting edge is between approximately 10 degrees and approximately 30 degrees.

11. The cutting and deburring tool of claim 10 , wherein the axial rake angle of each deburring cutting edge is between approximately 20 degrees and approximately

Assignees

• Greenlee Textron Inc
• Greenlee Tools Inc

Inventors

• Morton John Jeremiah
• Piper Arthur Anton
• Tully Gerald

Classifications

• B24B19/04

  for fluting drill shanks · CPC title

• B23B51/101

  Deburring tools (B23B51/103 takes precedence) · CPC title

• B23P15/32

  twist-drills · CPC title

• B23B51/009 Primary

  Stepped drills · CPC title

• B23B2251/64

  Drills operating in the reverse direction, i.e. in the unscrewing direction of a right-hand thread · CPC title