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Drill bit and diamond thin-wall drill

A drill bit and drilling rig technology, applied in stone processing equipment, stone processing tools, manufacturing tools, etc., can solve problems such as broken teeth, easy cracking, and weakening of bending strength, etc., to achieve good corrosion resistance and reduce matrix The effect of cracked or broken teeth

Active Publication Date: 2019-04-16
JIANGSU FENGTAI TOOLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the installation of structures such as corrugated grooves and U-shaped grooves also substantially "weakens" the overall bending strength and other properties. In dry drilling, especially in high-speed dry drilling conditions, cracking or even broken teeth are prone to occur. question

Method used

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  • Drill bit and diamond thin-wall drill

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023]The composition of the metal bond used is: 15wt% electrolytic copper powder, 3wt% atomized tin powder, 8wt% carbonyl nickel powder, 10wt% FeCoCu ultrafine alloy powder, 10wt% FeCuNiSn ultrafine alloy powder, 3wt% % of high chromium cast iron powder and the balance of electrolytic iron powder. Diamond is used as the hard particles, and the strength of the diamond particles is 40 kg, the particle size is 30 / 40, and the concentration is 35%. The diamond and metal bond are mixed evenly in a high-speed mixer, pressure-formed in a tooling mold to form a billet, and sintered in a resistance heating furnace, and in N 2 Insulate at 870°C for 60min under protective atmosphere.

Embodiment 2

[0025] The composition of the metal bond used is: 25wt% electrolytic copper powder, 5wt% atomized tin powder, 3wt% carbonyl nickel powder, 5wt% FeCoCu superfine alloy powder, 20wt% FeCuNiSn superfine alloy powder, 5wt% % of high chromium cast iron powder and the balance of electrolytic iron powder. Diamond is used as the hard particles, and the strength of the diamond particles is 40 kg, the particle size is 30 / 40, and the concentration is 35%. The diamond and metal bond are mixed evenly in a high-speed mixer, pressure-formed in a tooling mold to form a billet, and sintered in a resistance heating furnace, and in N 2 Insulate at 870°C for 60min under protective atmosphere.

Embodiment 3

[0027] The composition of the metal binder used is: 20wt% electrolytic copper powder, 4wt% atomized tin powder, 6wt% carbonyl nickel powder, 10wt% FeCoCu ultrafine alloy powder, 18wt% FeCuNiSn ultrafine alloy powder, 8wt% % of high chromium cast iron powder and the balance of electrolytic iron powder. Diamond is used as the hard particles, and the strength of the diamond particles is 40 kg, the particle size is 30 / 40, and the concentration is 35%. The diamond and metal bond are mixed evenly in a high-speed mixer, pressure-formed in a tooling mold to form a billet, and sintered in a resistance heating furnace, and in N 2 Insulate at 870°C for 60min under protective atmosphere.

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Abstract

The invention relates to a drill bit and a diamond thin-wall drill, and belongs to the technical field of drilling tools. A sharpening structure is arranged on the drill bit, the sharpening structurecomprises shallow grooves which are formed in two side surfaces at an interval, and the shallow grooves extend from the working surface of the drill bit to the bottom surface; and according to the drill bit, a matrix structure is formed by diamond particles and metallic bond through cold pressing and sintering, and the metallic bond is prepared from the compositions in percentage by weight: 15-25wt% of electrolytic copper powder, 3-5wt% of atomized tin powder, 3-8wt% of nickel tetracarbonyl powder, 5-12wt% of FeCoCu superfine alloy powder, 10-20wt% of FeCuNiSn superfine alloy powder, 1-10wt% high-chromium iron powder and the balance of electrolytic iron powder. The drill bit is provided with a weakening structure, the sharpness can be maintained not to be decreased under a condition of drilling at circulation break, an anti-impact property and an anti-corrosion property of the drill bit are good, and a phenomenon of matrix cracking or tooth breaking under a high-speed drilling at circulation break condition can be significantly reduced.

Description

technical field [0001] The invention relates to the technical field of drilling tools, and more specifically, the invention relates to a drill bit and a diamond thin-wall drill. Background technique [0002] Diamond thin-walled drills, also known as engineering drills and hollow drills, are mainly used for punching through wall holes when installing water, electricity, heating, gas, air conditioning, and pipelines in buildings. Drilling, nesting, coring, etc. for foundation projects such as highways, airport runways, bridges, and tunnels. Diamond thin-walled drills are divided into dry drills and wet drills according to their on-site working conditions. Dry drills are used without coolant and are used under harsh conditions. They are generally used for drilling ordinary cement and bricks. During the drilling process, wet drilling is cooled by adding water by connecting water-cooling facilities, and the drilling of reinforced concrete and hard cement usually adopts a wet dri...

Claims

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Application Information

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IPC IPC(8): B28D1/14C22C30/02C22C30/04C22C38/00C22C38/02C22C38/42C22C38/52C22C38/54
CPCB28D1/146C22C30/02C22C30/04C22C38/008C22C38/02C22C38/42C22C38/52C22C38/54
Inventor 邱瑜铭方利灵董先龙
Owner JIANGSU FENGTAI TOOLS
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