A Patent For Ultra-thin Diamond Cutting Blades

Application Number: 201310722867

Applicant: Antai Technology Co., Ltd. Beijing Antai Steel Research Superhard Material Products Co., Ltd

Abstract:

The present invention discloses an ultra-thin diamond cutting sheet and its manufacturing process, which comprises the following steps:

(1) producing a template for adsorbing diamond;

(2) Arrange the diamonds in an orderly manner on the template;

(3) Adhere the diamond arranged in an orderly manner on the template to the alloy foil, forming a thin layer of diamond arranged in an orderly manner;

(4) Stacking multiple layers of thin blanks together and ensuring that the diamonds of two adjacent blanks are arranged in a staggered radial direction;

(5) Place the stacked multi-layer thin blanks into a graphite mold for vacuum hot pressing sintering to form ultra-thin cutting sheet blanks;

(6) Grinding thinning and cutting inner and outer circles to obtain ultra-thin cutting pieces with diamond arranged in an orderly manner. The diamond of the present invention is arranged in an orderly manner, so that the diamond on the same cutting surface is uniformly stressed, avoiding the phenomenon of tooth breakage caused by excessive local stress; Ordered arrangement of ultra-thin diamond cutting blades has greatly improved the problem of material edge breakage compared to ordinary ultra-thin cutting blades.

 

Independent claim:

1. A diamond ultra-thin cutting sheet, characterized in that it is formed by vacuum hot pressing and sintering multiple thin blanks, each of which is composed of an alloy foil and multiple diamonds arranged in an orderly manner on the alloy foil. The diamonds of two adjacent thin blanks are arranged in a staggered manner in the radial direction of the cutting sheet.

2. The ultra-thin diamond cutting sheet according to claim 1, characterized in that the diamond is bonded to the alloy foil, preferably the alloy foil is tin green copper foil.

3. A manufacturing process for ultra-thin diamond cutting sheets as claimed in claim 1 or 2, characterized in that it comprises the following steps: (1) producing a template for adsorbing diamond; (2) Arrange the diamonds in an orderly manner on the template obtained in step (1); (3) Adhere the diamond arranged in an orderly manner on the template to the alloy foil, forming a thin layer of diamond arranged in an orderly manner; (4) According to the thickness of the ultra-thin cutting sheet, stack multiple layers of thin blanks together and ensure that the diamonds of two adjacent thin blanks are arranged in a staggered radial direction; (5) Place the multi-layer thin blanks stacked in step (4) into a vacuum sintering furnace for vacuum hot pressing sintering to form ultra-thin cutting sheet blanks; (6) Grind and thin the ultra-thin cutting blade blank, and cut the inner and outer circles to obtain ultra-thin cutting blades with ordered diamond arrangement.

4. The manufacturing process according to claim 3, characterized in that the tin bronze foil in step (3) is a binder for ultra-thin cutting sheets, and the weight percentage of tin in the tin bronze foil is 3-14%.

5. The manufacturing process according to claim 3, characterized in that the template in step (2) is installed on a vacuum pump, and the diamonds are arranged in an orderly manner on the template through vacuum adsorption.

6. The manufacturing process according to claim 3, characterized in that in step (3), adhesive for bonding diamond is applied to the tin bronze foil, the template adsorbed with diamond is placed on the tin bronze foil, and the vacuum is removed to allow the diamond to fall onto the adhesive of the tin bronze foil.

7. The manufacturing process according to claim 3, characterized in that in step (1), multiple templates are made, and multiple holes occupying 30% to 60% of the template surface area and accommodating diamonds are arranged in an orderly manner on each template. After stacking multiple templates, the holes on two adjacent templates are arranged in a staggered manner in the radial direction.

8. The manufacturing process according to claim 3, characterized in that in step (5), the sintering temperature of vacuum hot pressing sintering is 550-750 ℃, the sintering pressure is 10-20MPa, and the insulation and pressure holding time is 30-60min.

9. The manufacturing process according to claim 3, characterized in that it further comprises a tin green copper foil cutting ring and a flattening treatment step set before step (2): cutting the tin bronze foil into a circular structure, with an outer diameter that is 2-5mm larger than the outer diameter of the ultra-thin cutting sheet and an inner diameter that is 2-5mm smaller than the inner diameter of the ultra-thin cutting sheet, and then flattening treatment to make it flat.

10. The manufacturing process according to claim 3, further comprising a dewaxing treatment step before step (5): placing the multi-layer thin blanks stacked in step (4) into a dewaxing furnace and placing them at a temperature of 300-400 ℃ for 30-60 minutes to remove the glue in the thin blanks and complete the dewaxing treatment. It is preferred to use a graphite mold to stack the multi-layer thin blanks together in step (4).