Method for cutting and machining hard materials

• US 6,698,415 B2
• Filed: 03/06/2001
• Issued: 03/02/2004
• Est. Priority Date: 10/02/1998
• Status: Expired due to Term

• Current Assignee: Sandvik AB, Smith International Incorporated (Schlumberger NV)
• Original Assignee: Sandvik AB, Smith International Incorporated (Schlumberger NV)
• Inventors: Pearce, Denis G., Garcia, Michael J.
• Primary Examiner(s): Wilson, Lee D.
• Application Number:
  US09/799,903
• Publication Number:
  US 20020014232A1
• Time in Patent Office: 1,092 Days
• Field of Search: 125/12, 125/14, 125/12.01, 125/13.01, 125/22, 125/20
• US Class Current: 125/12
• CPC Class Codes: B23D 61/04 with inserted saw teeth the teeth being individually inserted

Abstract

Cutting tools and machining tools are provided having PCBN tips and/or coatings bonded to their cutting or machining surfaces for cutting or machining cement and/or mineral based hard building materials such as Hardiplank®.

Claims

1. A method for cutting a cement based material comprising:

providing a cutting blade having a cutting surface covered with a PCBN surface;

cutting the cement based material using the PCBN covered cutting surface; and

grinding the PCBN surface after cutting using equipment used to grind carbide material.

2. The method as recited in claim 1 wherein the cement based material comprises Portland cement, ground sand, and cellulose fibers.

3. The method as recited in claim 2 wherein the cement based material is Hardiplank®

.

4. The method as recited in claim 1 wherein the PCBN surface comprises cubic boron nitride, wherein the volume of the cubic boron nitride in the PCBN surface is in the range of about 90% to about 92%.

5. The method as recited in claim 1 wherein the PCBN surface comprises cubic boron nitride, wherein the volume content of the cubic boron nitride in the PCBN surface is greater than 90%.

6. The method as recited in claim 1 wherein the PCBN surface comprises cubic boron nitride, wherein the volume of the cubic boron nitride in the PCBN surface is in the range of about 57% to about 60%.

7. The method as recited in claim 1 wherein grinding comprises grinding without using electron discharge grinding equipment.

8. A method for cutting a cement based material comprising:

providing a blade having a plurality of teeth, each tooth having a leading edge and a PCBN surface over the leading edge;

cutting the cement based material using the PCBN surfaces of the teeth; and

grinding the PCBN surface after cutting using equipment used to grind carbide material.

9. The method as recited in claim 8 wherein forming comprises bonding a PCBN tip to the leading edge of each tooth.

10. The method as recited in claim 8 wherein the cement based material comprises Portland cement, ground sand, and cellulose fibers.

11. The method as recited in claim 10 wherein the cement based material is Hardiplank®

.

12. The method as recited in claim 8 wherein the PCBN surface comprises cubic boron nitride, wherein the volume of the cubic boron nitride in the PCBN surface is in the range of about 90% to about 92%.

13. The method as recited in claim 8 wherein the PCBN surface comprises cubic boron nitride, wherein the volume content of the cubic boron nitride in the PCBN surface is greater than 90%.

14. The method as recited in claim 8 wherein the PCBN surface comprises cubic boron nitride, wherein the volume of the cubic boron nitride in the PCBN surface is in the range of about 57% to about 60%.

15. The method as recited in claim 8 wherein grinding comprises grinding without using electron discharge grinding equipment.

20. The method as recited in claim 14 wherein grinding comprises grinding without using electron discharge grinding equipment.

16. A method for cutting a mineral based material comprising:

providing a cutting blade having a cutting surface covered with a PCBN surface;

cutting the mineral based material using the PCBN covered cutting surface; and

grinding the PCBN surface after cutting using equipment used to grind carbide material.

17. The method as recited in claim 16 wherein the PCBN surface comprises cubic boron nitride, wherein the volume content of the cubic boron nitride in the PCBN surface is greater than 90%.

18. The method as recited in claim 17 wherein PCBN surface comprises cubic boron nitride, wherein the volume of the cubic boron nitride in the PCBN surface is in the range of about 90% to about 92%.

19. The method as recited in claim 17 wherein the PCBN surface comprises cubic boron nitride, wherein the volume of the cubic boron nitride in the PCBN surface is in the range of about 57% to about 60%.