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Diamond coring bit and a laser welding preparation process thereof

A coring bit and laser welding technology, applied in drill bits, manufacturing tools, drilling equipment, etc., can solve the problems of difficult coring, slow drilling speed, harsh environmental requirements, etc., and achieve excellent welding strength, smooth water cooling, and safety. good performance

Inactive Publication Date: 2019-05-10
江苏友美工具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In China's rapidly developing economic environment, road construction and installation, high-efficiency coring operations are often very demanding, especially when the drill bit is in the drilling process, coring is difficult and the drilling speed is slow

Method used

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  • Diamond coring bit and a laser welding preparation process thereof
  • Diamond coring bit and a laser welding preparation process thereof
  • Diamond coring bit and a laser welding preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]In this embodiment, the composition (parts by weight) of the raw materials for diamond cutter head preparation: 20 parts of copper, 33 parts of iron, 12 parts of nickel, 29 parts of tungsten, 5.5 parts of tin, 0.5 part of rare earth alloy, 2.2 parts of diamond, and 0.0025 part of liquid paraffin .

[0046] The rare earth alloy is a La-Ni alloy, wherein La is 25wt.%, and the balance is Ni.

[0047] The raw material powder composition of the transition layer in this embodiment is: Co 21.2wt.%, Cu 8wt.%, Ni 3.05wt.%, and the balance is Fe.

[0048] The diamond cutter head and the transition layer are sintered together by hot pressing sintering technology, and the specific process is as follows:

[0049] After mixing the raw materials of the cutter head evenly in proportion, cold press molding is carried out first to obtain a prefabricated cutter head; after the raw material powder of the transition layer is mixed uniformly, cold press molding is also carried out to obtain ...

Embodiment 2

[0069] In this embodiment, the composition (parts by weight) of the raw materials for diamond cutter head preparation: 25 parts of copper, 35 parts of iron, 15 parts of nickel, 31 parts of tungsten, 4.5 parts of tin, 0.25 parts of rare earth alloy, 2.2 parts of diamond, and 0.0042 parts of liquid paraffin .

[0070] Others are all the same as in Example 1.

[0071] The coring diamond drill bit prepared in this embodiment has no macroscopic defects such as air holes and cracks in the weld seam after testing. The bending strength of the cutter head is greater than 1872N / mm 2 , welding strength 45N.m.

Embodiment 3

[0073] In this embodiment, the composition (parts by weight) of the raw materials for diamond cutter head preparation: 21 parts of copper, 30 parts of iron, 11 parts of nickel, 31 parts of tungsten, 4.5 parts of tin, 0.40 parts of rare earth alloy, 2.4 parts of diamond, and 0.0040 parts of liquid paraffin .

[0074] Others are all the same as in Example 1.

[0075] The coring diamond drill bit prepared in this embodiment has no macroscopic defects such as air holes and cracks in the weld seam after testing. The bending strength of the cutter head is greater than 1875N / mm 2 , welding strength 42N.m.

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Abstract

The invention discloses a diamond coring bit and a laser welding preparation process thereof, and belongs to the technical field of diamond coring bits. The diamond coring bit is formed by connectinga metal base body and diamond tool bits, and the tool bits are evenly distributed on the end face of the metal base body. A transition layer is arranged between the metal base body and the diamond tool bit, a plurality of strip-shaped grooves are evenly formed in the side surface of the diamond tool bit, and the side surface of the wavy tooth structure is formed. And the metal base body and the tool bit are connected into a whole through a laser welding process. Through the special design of the shape of the tool bit, the high-speed coring drill bit can play a very good water cooling role during large-depth drilling, and meanwhile, the continuous wave tooth structure on the inner wall of the tool bit is more beneficial to timely discharging of smashed silt, so that very good cutting performance is kept. By optimizing the components of the tool bits and the transition layer and optimizing technological parameters such as laser power and welding speed, a welding seam with excellent performance is obtained.

Description

technical field [0001] The invention relates to the technical field of diamond core drill bits, in particular to a diamond core drill bit and a laser welding preparation process thereof. Background technique [0002] Diamond core drill bits have unique advantages such as fast drilling speed, low stone loss, and no damage to the surrounding environment, so they are widely used in drilling concrete, asphalt, rock, and reinforced concrete walls. Diamond core drill bits are formed by connecting cutter heads on a steel substrate. At present, the domestic steel matrix and the cutter head are often connected by brazing. When the diamond core drill bit is working, due to the extremely fast speed and strong impact and vibration, high shear strength and high temperature strength are required. Therefore, the brazed cutter head is often due to High-speed drilling heating causes the solder to melt and fall off. [0003] In China's rapidly developing economic environment, road construct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/43E21B10/02B28D1/14B23P15/28C22C26/00C22C30/02C22C38/16C22C38/10C22C38/08B22F3/02B22F3/14B22F7/02
Inventor 万益俊
Owner 江苏友美工具有限公司
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