Hobbing tool with replaceable cutting inserts

Patent metadata

Field	Value
Publication number	US-10654119-B2
Application number	US-201716311446-A
Country	US
Kind code	B2
Filing date	Apr 7, 2017
Priority date	Jun 30, 2016
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

A hobbing tool includes a hob body having at least one axially extending slot, and at least one cassette removably disposed in the at least one slot. The at least one cassette includes at least one seating recess having at least a bottom abutment surface and two side abutment surfaces. At least one cutting insert is removably mounted in the at least one seating recess. The at least one cutting insert has at least one bottom supporting surface and two side supporting surfaces that abut the bottom abutment surface and the two side abutment surfaces when the at least one cutting insert is received in the at least one seating recess. The hob body includes a plurality of axially extending slots. The hobbing tool also includes a corresponding plurality of cassettes removably mounted in the plurality of axially extending slots. Each cassette of the plurality of cassettes is identical to every other cassette of the plurality of cassettes.

First claim

What is claimed is:

1. A hobbing tool comprising:
a hob body including a plurality of axially extending slots;
a top flange and a bottom flange attached to the hob body;
at least one cassette removably disposed in at least one of the plurality of axially extending slots, the at least one cassette including at least one seating recess having at least a bottom abutment surface and two side abutment surfaces;
at least one cutting insert removably mounted in the at least one seating recess, the at least one cutting insert having at least one bottom supporting surface and two side supporting surfaces that abut the bottom abutment surface and the two side abutment surfaces when the at least one cutting insert is received in the at least one seating recess; and
a plurality of cassettes removably mounted in the plurality of axially extending slots each of the plurality of cassettes being identical, wherein the hob body includes a corresponding number of of slots as cassettes, wherein the top flange has a bottom end facing the hob body and the bottom flange has a top end facing the hob body, and the bottom end of the top flange and the top end of the bottom flange each having a corresponding plurality of top recesses and bottom recesses for receiving top ends and bottom ends, respectively, of respective ones of the plurality of cassettes, each recess of at least one of the plurality of top recesses in the top flange and the plurality of bottom recesses in the bottom flange having a different axial depth than any other recess of the at least one of the plurality of top recesses in the top flange and the plurality of bottom recesses in the bottom flange.

2. The hobbing tool as set forth in claim 1 , wherein each recess of the plurality of recesses in the bottom flange has a different axial depth than any other recess of the plurality of recesses in the bottom flange.

3. The hobbing tool as set forth in claim 1 , wherein each recess of the plurality of recesses in the top flange has a different axial depth than any other recess of the plurality of recesses in the top flange.

4. The hobbing tool as set forth in claim 1 , further comprising an anvil arrangement including an anvil and an anvil screw disposed in each of the plurality of bottom recesses, the anvil screw mating with internal threads in holes in the bottom flange, and an abutment surface of each anvil abutting a bottom end of a respective one of the plurality of cassettes.

5. The hobbing tool as set forth in claim 1 , further comprising a wedge arrangement including a wedge and a wedge screw disposed in each of the plurality of top recesses, the wedge screw mating with internal threads in holes in the top flange and with internal threads in holes in the wedge, and an abutment surface of the wedge abutting a top end of a respective one of the plurality of cassettes and a wedge surface of the wedge abutting a wedge surface of a respective top recess.

6. The hobbing tool as set forth in claim 1 , wherein each cassette of the plurality of cassettes is removably mounted in a respective one of the plurality of axially extending slots by screws that extend through axially elongated slots in tops and bottoms of each cassette and that mate with internal threads in holes in the hob body.

7. The hobbing tool as set forth in claim 1 , wherein the plurality of cassettes are mounted relative to the hob body so that cutting inserts on the plurality of cassettes form a helix.

8. The hobbing tool as set forth in claim 1 , wherein each cassette of the plurality of cassettes has a plurality of seating recesses and wherein a corresponding plurality of cutting inserts is removably mounted in each of the plurality of seating recesses.

9. The hobbing tool as set forth in claim 1 , wherein the at least one cutting insert has four sides of equal length.

10. The hobbing tool as set forth in claim 1 , wherein the at least one cutting insert is indexable to four positions.

Assignees

• Seco Tools Ab

Inventors

• Consonni Andrea

Classifications

• B23F21/166 Primary

  in exchangeable arrangement · CPC title