Metal cutting tool

• US 7,331,736 B2
• Filed: 10/14/2004
• Issued: 02/19/2008
• Est. Priority Date: 10/14/2003
• Status: Expired due to Fees

• Current Assignee: Kennametal Incorporated
• Original Assignee: Kennametal Incorporated
• Inventors: Nicholas, Roger
• Primary Examiner(s): Carter; Monica
• Assistant Examiner(s): Addisu; Sara
• Application Number:
  US10/575,390
• Publication Number:
  US 20070110526A1
• Time in Patent Office: 1,223 Days
• Field of Search: 407/91, 407/110, 407/50, 407/109, 407/107, 407/111, 821/58
• US Class Current: 407/110
• CPC Class Codes: B23B 2205/02 Fixation using an elastically deformable clamping member
• CPC Class Codes: B23B 27/08 Cutting tools with blade- or disc-like main parts with disc-like main parts B23B27/083
• CPC Class Codes: B23B 29/043 with cutting-off, grooving or profile cutting tools, i.e. blade- or disc-like main cutting parts B23B29/14 takes precedence
• CPC Class Codes: Y10T 407/225 Resiliently biased tool clamping jaw
• CPC Class Codes: Y10T 407/2286 Resiliently biased clamp jaw
• CPC Class Codes: Y10T 407/2288 Integral with holder
• CPC Class Codes: Y10T 407/23 including tool having plural alternatively usable cutting edges
• CPC Class Codes: Y10T 407/25 including cut off tool

Abstract

A cutting tool assembly (14) including a tool holder (20) having a removeable clamp (20a). A cutting insert support blade member (16) is removably held in the tool holder by the clamp (20a). The cutting insert support blade (16) includes at least one, preferably two, insert receiving pockets (30). The pockets (30) are defined by a body portion (16b) and a clamp portion (16a) joined together by an integrally formed resilient or deformable portion (16c) which permits slight resilient movement between the clamping and body portions to facilitate the installation of a cutting insert (18) in a pocket. When the insert support blade (16) is mounted in the tool holder (20), the clamp inserts clamping forces to the clamping portion (16a) of the insert support blade which serves to secure the insert support blade to the tool holder and exert clamping forces on an insert (18) held in the pocket. The integrally formed resilient/deformable portion (16c) includes a plurality of slots (50, 52, 50′, 52′), some of which open into an aperture (54) spaced from a pocket (30). The slots enable resilient movement between the clamping and body portions.

Claims

1. A cutting tool assembly, comprising:

a) a tool holder including a clamp;

b) a cutting insert support member removably held in said tool holder by said clamp;

c) a cutting insert removably held by said insert support member;

d) said insert support member defining an insert receiving pocket defined in part by a body portion and a clamping portion, the clamping portion coupled to said body portion by an integrally formed resilient portion which permits slight resilient movement between said clamping and body portions to facilitate the installation of a cutting insert in said pocket;

e) said support member defining a slot segment that extends outwardly from an aperture, said aperture spaced inwardly with respect to said pocket; and

f) said resilient portion including at least one relatively this slot and laterally extending slot extending inwardly from said aperture.

2. The apparatus of claim 1 wherein said resilient portion enables clamping forces exerted by said tool holder clamp to be transferred to the cutting insert held in said pocket.

3. The apparatus of claim 1 wherein said resilent portion includes a plurality of said relatively thin slots.

4. The apparatus of claim 1 wherein said body portion and said clamping portion each define gripping surfaces engagable with complementally formed surfaces on said cutting insert.

5. The apparatus of claim 4 wherein said gripping surfaces are V-shaped.

6. The apparatus of claim 1 wherein said cutting insert support member is in the form of a blade and said tool holder clamp is operative to apply clamping forces to said clamping portion of said blade, whereby said blade is held in said tool holder.

7. The apparatus of claim 6 wherein said blade defines an insert receiving pocket at opposite ends.

8. The apparatus of claim 7 wherein each pocket includes an abutment wall which is engaged by a cutting insert held in said pocket.

9. A cutting insert support blade adapted to be held in a tool holder, comprising:

a) a body portion;

b) a clamp portion;

c) a resilient coupling region joining said clamp portion to said body portion;

d) a pair of cutting insert receiving pockets defined between said body and clamping portions each pocket including a slot segment; and

,

e) said coupling region including a plurality of relatively thin slots formed in said coupling region located intermediate said slot segments.

10. The apparatus of claim 9 wherein said plurality of slots includes a pair of upper and lower slots associated with one of said insert receiving pockets and another pair of upper and lower slots associated with another of said insert receiving pockets.

11. The apparatus of claim 10 wherein said plurality of slots further includes a laterally extending slot positioned between said upper and lower slots.

12. A cutting tool assembly, comprising:

a) a tool holder including a removable clamp;

b) a cutting insert support blade removably held in said tool holder by said clamp;

c) said insert support blade defining at least one insert receiving pocket defined in part by a body portion and a clamping portion coupled together by an integrally formed deformable portion which permits slight resilient movement between said clamping and body portions to facilitate the installation of a cutting insert in said pocket, said pocket communicating with an aperture;

d) said body portion and said clamping portion including respective gripping surfaces movable towards and away from complementally formed surfaces on a cutting insert held in said pocket;

e) said gripping surfaces urged into clamping engagement with said complementally formed insert surfaces by said tool holder clamp; and

f) said deformable portion including a plurality of relatively thin slots spaced inwardly with respect to said aperture.

13. The apparatus of claim 12 wherein said integrally formed deformable portion includes at least one relatively thin slot located between said body portion and said clamping portion.

14. The apparatus of claim 12 wherein said body, clamping and deformable portions are integrally formed from a single piece of material.

15. The apparatus of claim 12 wherein said insert support blade defines two insert receiving pockets and said blade is reversible in said tool holder to present either one of two cutting inserts held by said pockets into a machining position.

16. A cutting insert support blade adapted to be held in a tool holder, comprising:

a) a body portion;

b) a clamp portion;

c) a resilient coupling region joining said clamp portion to said body portion;

d) a pair of cutting insert receiving pockets defined between said body and clamping portions;

e) said coupling portion including a plurality of relatively thin slots formed in said coupling portion; and

f) said plurality of slots includes a pair of upper and lower slots associated with one of said insert receiving pockets and another pair of upper and lower slots associated with another of said insert receiving pockets.

17. The apparatus of claim 16 wherein said plurality of slots further includes a laterally extending slot positioned between said upper and lower slots.