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Diamond drill bit production mold and diamond drill bit

A technology of diamond drill bits and molds, which is applied in the direction of drill bits, drilling equipment, earthwork drilling, etc., can solve the problems of sintering pressure leakage, loss of bonding materials, etc., achieve strong inner diameter strength and wear resistance, reduce a large amount of loss, and alleviate leakage The effect of the phenomenon

Pending Publication Date: 2020-05-29
河北省地矿局第七地质大队
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The first object of the present invention is to provide a kind of diamond bit production mold, to alleviate existing in the sintering process in the prior art, the gap between the steel body and the mandrel increases as the temperature increases, resulting in severe sintering pressure Technical problems with leakage and significant loss of bonding material in the carcass

Method used

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  • Diamond drill bit production mold and diamond drill bit
  • Diamond drill bit production mold and diamond drill bit
  • Diamond drill bit production mold and diamond drill bit

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Experimental program
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Effect test

Embodiment 1

[0040] see Figure 1 to Figure 5 As shown, the present embodiment provides a diamond bit production mold, including a bottom mold 101, a mandrel 102 and a steel body 103; the bottom mold 101 is used to place the diamond cutting body and matrix alloy powder; the mandrel 102 includes a cylindrical section 104 And the circular platform section 105, the cylindrical section 104 is fixedly connected with the bottom mold 101, the circular platform section 105 is fixedly connected with the cylindrical section 104, the lower bottom of the circular platform section 105 coincides with the upper surface of the cylindrical section 104; the steel body 103 can be sleeved on the circular platform section 105 above, and the steel body 103 is configured such that in the initial state, its lower end is located between the two ends of the truncated circular section 105, and when it is lowered to normal temperature after sintering, its lower end is located at the junction of the circular truncated ...

Embodiment 2

[0069] see Figure 6 As shown, this embodiment provides a diamond drill, and the diamond drill provided in this embodiment is prepared by using the diamond drill production mold provided in Embodiment 1 of the present invention.

[0070] The diamond drill bit provided in this embodiment is prepared by adopting the diamond drill bit production mold provided in Embodiment 1 of the present invention, and the gap between the steel body 103 and the mandrel 102 at the high temperature stage can be reduced as much as possible during the preparation process. Therefore, the leakage phenomenon of sintering pressure can be effectively alleviated, and the loss of a large amount of bonding materials in the matrix can be reduced. The prepared diamond drill bit has strong inner diameter strength and wear resistance.

[0071] It should be noted that in actual production, after sintering and cooling down and demoulding, the steel body 103 needs to be further processed according to the standard...

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Abstract

The invention relates to the technical field of hot pressing diamond drill bit manufacturing equipment, in particular to a diamond drill bit production mold and a diamond drill bit. The diamond drillbit production mold comprises a bottom mold, a core mold and a steel body. The bottom mold is used for placing of a diamond cutting body and matrix alloy powder, the core mold comprises a cylinder segment and a circular truncated cone segment, the cylindrical segment is fixedly connected with the bottom mold, the circular truncated cone segment is fixedly connected with the cylindrical segment, alower bottom of the circular truncated cone segment coincides with an upper surface of the cylindrical segment, the circular truncated cone segment can be sleeved with the steel body, the steel body is configured as follows: under the initial state, a lower end of the steel body is located between two ends of the circular truncated cone segment, after sintering, under the condition that the steelbody is cooled to be in a normal temperature state, the lower end of the steel body is located at a connecting position of the circular truncated cone segment and the cylindrical segment; and the taper of the circular truncated cone segment is K, K=2X<conventional high temperature>:H<descent>. Through design of the circular truncated cone segment with the proper taper, the actual size of a gap between the steel body at the high-temperature stage and the core mold can be reduced as much as possible, leakage of sintering pressure can be effectively relieved, and great losses of binding materialsin a matrix body can be reduced.

Description

technical field [0001] The invention relates to the technical field of hot-pressed diamond bit manufacturing equipment, in particular to a diamond bit production mold and a diamond bit. Background technique [0002] Hot-pressed diamond drill bits are the most widely used tools in drilling at present, and the gauge capacity is an important aspect of diamond drill bit performance. [0003] At present, in the production of conventional hot-pressed diamond drill bits, graphite is used to make a cylindrical mandrel, and No. 45 steel is used to make a hollow cylindrical steel body, and diamond cutting body and matrix powder are placed between the bottom die and the mandrel. Finally, press into the steel body. At this time, the steel body is completely set on the mandrel, and there is an assembly gap between the steel body and the mandrel, and then hot-pressed and sintered. The hot pressing sintering process is to gradually increase the sintering pressure as the temperature rises ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/03B22F7/08B22F5/00E21B10/00
CPCB22F3/03B22F7/08B22F5/00E21B10/00B22F2005/001
Inventor 孙秀梅马卫东任晓顺饶剑辉李培林曹雪原王常顺曹艳丽侯林高婷婷
Owner 河北省地矿局第七地质大队