Tool for material-removing machining of workpieces

• US 6,884,007 B2
• Filed: 03/07/2002
• Issued: 04/26/2005
• Est. Priority Date: 03/16/2001
• Status: Expired due to Fees

• Current Assignee: Fabrik Fur Prazisionswerkzeuger
• Original Assignee: Fabrik Fur Prazisionswerkzeuge
• Inventors: Häberle, Friederich, Kress, Dieter
• Primary Examiner(s): Cadugan, Erica
• Assistant Examiner(s): Ross, Dana
• Application Number:
  US10/092,768
• Publication Number:
  US 20020141834A1
• Time in Patent Office: 1,146 Days
• Field of Search: 407/40, 407/47, 407/49, 407/107, 407/108, 407/109, 407/110, 407/111, 407/112, 408/713, 408/213, 408/227, 408/187, 408/188, 408/229, 408/233, 408/231
• US Class Current: 407/40
• CPC Class Codes: B23B 27/007 for internal turning boring bars B23B29/02, boring heads B23B29/03; milling cutters B23C5/00; reamers B23D77/00
• CPC Class Codes: B23B 27/10 Cutting tools with special provision for cooling drills with lubricating or cooling equipment B23B51/06; features relating to lubricating or cooling of milling cutters B23C5/28; arrangements or devices for cooling or lubricating tools or work B23Q11/10
• CPC Class Codes: B23B 27/1625 with plate-like cutting inserts of special shape clamped by a clamping member acting almost perpendicularly on the chip-forming plane B23B27/1644 takes precedence
• CPC Class Codes: B23Q 11/005 by blowing
• CPC Class Codes: Y10T 407/192 with separate means to fasten tool to holder
• CPC Class Codes: Y10T 407/1934 with separate means to fasten tool to holder
• CPC Class Codes: Y10T 407/22 including holder having seat for inserted tool
• CPC Class Codes: Y10T 407/2272 with separate means to fasten tool to holder
• CPC Class Codes: Y10T 407/2282 including tool holding clamp and clamp actuator
• CPC Class Codes: Y10T 407/2292 Slidable jaw
• CPC Class Codes: Y10T 407/235 with integral chip breaker, guide or deflector
• CPC Class Codes: Y10T 408/868 with multiple cutting positions
• CPC Class Codes: Y10T 408/90993 Screw driven means

Abstract

A tool for material-removing machining of workpieces of hard metal with a blade plate held by a clamping lug is suggested which is distinguished in that the blade plate (11) has a groove (25) provided on the front side (45) in which the clamping lug (13) engages.

Claims

1. A tool for material-removing machining of workpieces of hard metal, the tool comprising:

a base body having a longitudinal axis of rotation;

a blade plate of triangular shape having a front side, a cutter formed at one apex of said triangular shape opposite an inner side of said triangular shape, and a continuous, linear groove formed within said front side which extends in length from one side of said triangular shape to the adjoining side of said triangular shape in an orientation parallel to said inner side of said triangular shape and oriented parallel to said longitudinal axis of rotation of said base body to stabilize said blade plate in operation; and

a clamping lug having a clamping lip sized for receipt in said groove of said blade-plate, said clamping lip having a selected width which corresponds to approximately the length of said linear groove and lies within an incircle of said blade plate.

2. The tool according to claim 1, wherein said groove in cross section has an edge which is oriented at an angle to the plane of said front side of said blade plate, said angle being between about 8°

and 12°

.

3. The tool according to claim 2, wherein said angle of said edge is approximately 10°

.

4. The tool according to claim 1 wherein at least a portion of said base body is cylindrical and has a longitudinal axis extending therethrough.

5. The tool according to claim 4, wherein said base body has a radially-extending arched projection located in proximity to said blade plate which serves as a support for said blade plate.

6. The tool according to claim 4, wherein said base body is constructed as one piece.

7. The tool according to claim 4 wherein said cutter extends radially from said base body and said front side of said blade plate is oriented at an acute angle to a plane transecting said central axis.

8. The tool according to claims 7 wherein said acute angle is between 4°

and 8°

.

9. The tool according to claim 1 wherein said groove is located in close proximity to said cutter.

10. The tool according to claim 1, wherein said cutter is curved and has a defined radius of curvature.

11. The tool according to claim 1, wherein said clamping lug is configured with two non-parallel lateral surfaces oriented at an acute angle to each other which contact and engage said base body to prevent said clamping lug from moving relative to said base body thereby securing said blade plate in position.

12. A tool for material-removing machining of workpieces of hard metal, the tool comprising:

a base body at least a portion of which is cylindrical and having a longitudinal axis of rotation formed therethrough;

a blade plate secured to said base body and held by a clamping lug, said blade plate having a radially extending cutter and a front side with a continuous linear groove of selected length formed in said front side oriented parallel to said longitudinal axis of rotation and sized for receiving a clamping lip of said clamping lug within said linear groove along substantially the length of said linear groove to stabilize said blade plate in operation; and

an arcuate projection extending radially relative to said longitudinal axis of said cylindrical base body and located in proximity to said blade plate for support thereof.

13. The tool according to claim 12 further comprising a spacer positioned between said arcuate projection and said blade plate, said spacer being adapted to the contour of said blade plate and being sized in dimension to extend radially a distance less than said cutter.

14. The tool according to claim 12, wherein said arcuate projection extends circumferentially from a point near said blade plate to a distance of about 90°

about said longitudinal axis of said base body.

15. A tool for material-removing machining of workpieces of hard metal, the tool comprising:

a blade plate held by a clamping lip, said blade plate being triangular in shape with a first edge defining a directional axis of rotation and a curved cutter formed at an apex of said triangular shape opposite said first edge, said blade plate having a front side with a continuous, linear groove formed in said front side in which said clamping lip engages, said linear groove extending in length from one side of said triangular shape adjacent to said cutter to the other side of said triangular shape adjacent said cutter, and said clamping lip having a width which corresponds to approximately the length of said groove and lies within an incircle of said blade plate, the linear groove being positioned in close proximity to said curved cutter and oriented parallel to said directional axis of rotation; and

a clamping lug configured with two non-parallel lateral surfaces oriented at an acute angle to each other positioned for contact and engagement with a tool body to prevent said clamping lug from moving relative to a tool body thereby securing said blade plate in position.

16. The tool according to claim 15, wherein the groove has an edge which is disposed at an angle of between about 8°

and 12°

with respect to a plane formed along the front side of the blade plate.