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Process for manufacturing a circular saw blade and circular saw blade made thereby

Imported: 24 Feb '17 | Published: 06 Jan '04

Lambert Frey

USPTO - Utility Patents

Abstract

Process for manufacturing a circular saw blade and a saw blade obtainable by the process. At least two congruent metal blades of an iron-based alloy are glued together and the inner and outer lateral surfaces thereof are treated to provide roughness values within certain limits.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is further described in the detailed description which follows, with reference to the noted plurality of drawings wherein:

FIG. 1 is a representation of a surface roughness profile; and

FIG. 2 is a representation of a cross-sectional profile with the arithmetic mean roughness index.

Claims

1. A process for the manufacture of a circular saw blade by gluing together at least two congruent metal blades of an iron-based alloy, comprising:

2. The process of claim 1, wherein the saw blade has at least one of slots and teeth in the area of its outer circumference and wherein the process further comprises securing cutting elements selected from cutting segments, cutting tips and combinations thereof to circumferential surfaces between said at least one of slots and teeth.

3. The process of claim 2, wherein the cutting elements are secured by metallic bonding.

4. The process of claim 3, wherein said metallic bonding comprises at least one of soldering and welding.

5. The process of claim 2, wherein said cutting segments comprise diamond segments.

6. The process of claim 1, wherein the adhesive is applied at a thickness of 0.03 to 0.06 mm, measured from a center line of a roughness profile of the inner lateral surface.

7. The process of claim 1, wherein the thermal hardening of the adhesive is carried out in two stages.

8. The process of claim 7, wherein a first stage of the thermal hardening comprises heating at a temperature ranging from 50° C. to 70° C. and under a pressure ranging from 1 to 3 kg/cm

2.

9. The process of claim 8, wherein the first stage is carried out for 10 to 16 minutes.

10. The process of claim 8, wherein a second stage of the thermal hardening comprises heating at a temperature ranging from 140° C. to 160° C. to complete the hardening of the adhesive.

11. The process of claim 1, wherein the inner lateral surfaces are treated prior to the outer lateral surfaces.

12. The process of claim 11, wherein the inner lateral surfaces are treated by brush polishing.

13. The process of claim 12, wherein the outer lateral surfaces are treated by brush polishing.

14. The process of claim 11, wherein the inner lateral surfaces are treated by circular polishing.

15. The process of claim 14, wherein the outer lateral surfaces are treated by circular polishing.

16. The process of claim 1, wherein the outer lateral surfaces are treated prior to the inner lateral surfaces.

17. The process of claim 1, wherein the outer lateral surfaces are treated prior to the partial plastic deforming.

18. The process of claim 1, wherein the metal blades are made from the heat-treated sheet material by a thermal cutting operation.

19. The process of claim 18, wherein the thermal cutting operation comprises laser cutting.

20. The process of claim 1, wherein prior to the partial plastic deforming, the metal blades are subjected to a tempering treatment.

21. The process of claim 20, wherein the tempering treatment is carried out at a temperature ranging from 380° C. to 480° C.

22. The process of claim 1, wherein the iron-based alloy comprises, in weight percent:

the balance being iron and incidental impurities, with the contents of phosphorus and sulfur each not exceeding 0.03 percent by weight.

23. The process of claim 22, wherein the saw blade has at least one of slots and teeth in the area of its outer circumference and wherein the process further comprises soldering cutting elements selected from cutting segments, cutting tips and combinations thereof to circumferential surfaces between said at least one of slots and teeth.

24. The process of claim 1, wherein the iron-based alloy comprises, in weight percent:

the balance being iron and incidental impurities, with the contents of phosphorus and sulfur each not exceeding 0.03 percent by weight.

25. The process of claim 24, wherein the saw blade has at least one of slots and teeth in the area of its outer circumference and wherein the process further comprises welding cutting elements selected from cutting segments, cutting tips and combinations thereof to circumferential surfaces between said at least one of slots and teeth.

26. The process of claim 25, wherein the welding comprises laser welding.

27. The process of claim 1, wherein the of the metal blades are partially plastically deformed by roller-burnishing.

28. A process for the manufacture of a circular saw blade by gluing together at least two congruent metal blades of an iron-based alloy, comprising, in the given order:

29. The process of claim 28, wherein the saw blade has at least one of slots and teeth in the area of its outer circumference and wherein the process further comprises securing cutting elements selected from cutting segments, cutting tips and combinations thereof to circumferential surfaces between said at least one of slots and teeth.

30. The process of claim 29, wherein the cutting elements are secured by metallic bonding.

31. The process of claim 30, wherein said metallic bonding comprises at least one of soldering and welding.

32. A circular saw blade obtainable by a process comprising:

33. The saw blade of claim 32, wherein the saw blade has at least one of slots and teeth in the area of its outer circumference and wherein the process further comprises securing cutting elements selected from cutting segments, cutting tips and combinations thereof to circumferential surfaces between said at least one of slots and teeth.

34. The saw blade of claim 33, wherein the cutting elements are secured by metallic bonding.

35. The saw blade of claim 34, wherein the inner and outer lateral surfaces are treated by at least one of brush polishing and circular polishing.

36. The saw blade of claim 32, wherein the iron-based alloy comprises, in weight percent:

the balance being iron and incidental impurities, with the contents of phosphorus and sulfur each not exceeding 0.03 percent by weight.

37. The saw blade of claim 36, wherein the saw blade has at least one of slots and teeth in the area of its outer circumference and wherein cutting elements selected from cutting segments, cutting tips and combinations thereof are soldered to circumferential surfaces between said at least one of slots and teeth.

38. The saw blade of claim 32, wherein the iron-based alloy comprises, in weight percent:

the balance being iron and incidental impurities, with the contents of phosphorus and sulfur each not exceeding 0.03 percent by weight.

39. The saw blade of claim 38, wherein the saw blade has at least one of slots and teeth in the area of its outer circumference and wherein cutting elements selected from cutting segments, cutting tips and combinations thereof are welded to circumferential surfaces between said at least one of slots and teeth.