CN214867254U - Diamond bit mould and diamond bit - Google Patents

Abstract

The utility model discloses a diamond bit mould and diamond bit belongs to the relevant technical field of diamond bit production. The diamond drill bit die comprises an outer die, a core die, a first insert block and a second insert block, wherein the core die is arranged on the inner side of the outer die, an annular gap is formed between the outer die and the core die, and the first insert block and the second insert block are placed in the annular gap in a staggered mode. The drill bit manufacturing process is simple, the manufactured drill bit is good in quality, and the production requirements can be met. The diamond bit has compact structure and is continuously used.

Description

Diamond bit mould and diamond bit

Technical Field

The utility model belongs to the technical field of diamond bit production is relevant, more specifically says, relates to a diamond bit mould and diamond bit.

Background

With the development of deep prospecting, the number of 'slippery' rock layers is increased, but the 'slippery' rock layers are not objective, and the phenomenon of skidding is a common phenomenon encountered when a drill bit is not adaptive to rocks. The slipping stratum is mainly characterized by hard rock, compact structure and weak abrasiveness. The conventional drill bit slips when drilling in a hard, compact and weak-abrasiveness stratum, and the main reason is that diamond and a matrix are not consumed and matched, and the prominent expression is that diamond at the bottom lip of the drill bit cannot be automatically edged or the edging height is not enough, and a traditional formula using WC-Co as a framework material cannot break through the stratum. In the manufacturing process of the drill bit, how to realize simple manufacturing of the drill bit, the manufactured drill bit is convenient to use and good in performance, and is urgent to solve.

The Chinese patent application numbers are: 202010190417.4, publication date is: the 'diamond bit production mold and diamond bit' of 2020-05-29 comprises a bottom mold, a core mold and a steel body; the bottom die is used for placing the diamond cutting body and the matrix alloy powder; the core mold comprises a cylindrical section and a circular table section, the cylindrical section is fixedly connected with the bottom mold, the circular table section is fixedly connected with the cylindrical section, and the lower bottom of the circular table section is superposed with the upper surface of the cylindrical section; the steel body can be sleeved on the circular table section, the lower end of the steel body is arranged between two ends of the circular table section in an initial state, and the lower end of the steel body is arranged at the connecting position of the circular table section and the cylindrical section when the steel body is cooled to a normal temperature state after sintering; the taper of the circular table section is K, and the K is 2X of the conventional high temperature, namely H is reduced. By designing the circular truncated cone section with proper taper, the actual size of the gap between the steel body and the core mold at the high-temperature stage can be reduced as much as possible, so that the leakage phenomenon of sintering pressure can be effectively relieved, and the loss of a large amount of bonding materials in the tire body is reduced.

The Chinese patent application numbers are: 201010582746.X, published as: 2011-04-06 "a drill bit processing mold", includes a sawtooth ring and more than one concentric ring made of easily worn material, the sawtooth ring is provided with more than two tooth sockets which are arranged in sequence along the circumferential direction and are used for forming drill teeth, the sawtooth ring is provided with more than one ring hole in sequence along the radial direction, and the concentric ring is inserted into the ring holes with the same diameter.

The Chinese patent application numbers are: 200810172488.0, publication date is: 2010-06-16 'sintering mould of matrix polycrystalline diamond compact bit', wherein graphite is adopted to replace teeth on a sintering basement membrane of the sintering mould of the matrix polycrystalline diamond compact bit, and the spatial structure parameters of the bit are controlled by adjusting the height and angle of the graphite replacing teeth; the tooth distribution density and the scraper shape of the PDC drill bit are controlled by adjusting the arrangement shape of the graphite substitute teeth on the sintering bottom die.

The Chinese patent application numbers are: 200810071446.8, publication date is: 2009-02-04, a sintering and forming die for a diamond thin-wall drill bit, which comprises a female die with a central hole which is vertically communicated and has the inner diameter equal to the outer diameter of the bit; a lower pressing head which can move up and down and is matched in the central hole of the female die; a die core is sleeved in a center hole of the female die above the lower pressure head, and the outer diameter of the die core is equal to the inner diameter of the tool bit; a central concave hole which is equivalent to the outer diameter of the mold core and is not communicated with the mold core is concavely arranged in the middle of the top surface of the lower pressure head; the lower end part of the mold core is inserted into a central concave hole of the lower pressure head and supported on the lower pressure head; a molding cavity is formed between the mold core and the female mold; and a plurality of arc-shaped sheet forming insertion blocks with the thickness equivalent to that of the forming cavity; the top surface of the lower pressure head is provided with a plurality of embedding ports which are arranged at equal intervals, each embedding port is embedded with a forming insert block, and the lower part of the forming insert block is embedded into the middle part and the upper part of the embedding port and extends into the forming cavity to form a cutter head water channel. The invention realizes the one-step sintering molding of the diamond thin-wall drill bit, the open water tank on the bit can be directly sintered, the service life of the die is long, and the die is convenient to disassemble and assemble.

Disclosure of Invention

1. Problems to be solved

To the problem that current drill bit mould is not convenient for use, the utility model provides a diamond bit mould, drill bit manufacturing process is comparatively simple, and the drill bit quality of preparation is good, can adapt to the production demand.

Another object of the present invention is to provide a diamond drill bit, which is compact and utilizes continuous use.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

The utility model discloses a diamond bit mould, including external mold, mandrel, first inserted block and second inserted block, the external mold inboard sets up the mandrel, form annular gap between external mold and the mandrel, first inserted block and the crisscross annular gap of placing of second inserted block.

As a further explanation of the utility model, be provided with the die cavity in the middle of the external mold, be provided with the through-hole in the middle of the die cavity.

As a further explanation of the present invention, the core mold is cylindrical, and the cylindrical core mold has a protrusion on one end, and the core mold is disposed in the outer mold cavity, and the protrusion of the core mold is engaged with the through hole.

As a further explanation of the utility model, the outer mold and the core mold are made of graphite.

As a further explanation of the utility model, first inserted block is the working layer piece, first inserted block formula inserted block as an organic whole.

As a further explanation of the utility model, the second inserted block is a water gap block, and the second inserted block formula inserted block as an organic whole.

As a further explanation of the present invention, the first insert block and the second insert block are in clearance fit with each other.

The utility model discloses a diamond bit, by in any one of the above-mentioned diamond bit mould make.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses a diamond bit mould, diamond bit can produce a large amount of heats in the use, so in the design process of carrying out diamond bit, the heat dissipation problem of drill bit need be considered, current diamond bit adopts the mode setting of diamond and mouth of a river staggered arrangement at the tip, this problem that makes diamond bit need solve the mouth of a river, utilize external mold and mandrel to form diamond bit filler cavity, utilize the staggered arrangement of first inserted block and second inserted block, form the staggered arrangement of diamond and the mouth of a river of diamond bit, easily subsequent sintering;

(2) the utility model discloses a diamond bit mould, form the annular gap between external mold and the mandrel, the annular gap is the main part shape of diamond bit, connect through the block between arch and the through-hole between external mold and the mandrel, can carry out very easy split to the mould, make the mould install and split more easily, easy to use;

(3) the utility model discloses a diamond bit mould, first inserted block and second inserted block are the integral type inserted block, because the staggered arrangement in mouth of a river, so diamond portion on the drill bit and mouth of a river part can pack respectively, accomplish diamond bit's preparation.

Drawings

Fig. 1 is a schematic view of the overall structure of a diamond drill mold according to the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic structural diagram of a first insert block;

FIG. 4 is a schematic cross-sectional view taken along line B-B in FIG. 3;

FIG. 5 is a schematic structural diagram of a second insert block;

FIG. 6 is a schematic cross-sectional view taken at C-C in FIG. 5;

FIG. 7 is a schematic structural view of an outer mold;

FIG. 8 is a schematic cross-sectional view taken along line D-D in FIG. 7;

fig. 9 is a schematic view of the structure of the core mold;

FIG. 10 is a schematic cross-sectional view taken along line E-E in FIG. 9;

fig. 11 is a schematic view of the overall structure of the diamond drill product of the present invention.

In the drawings: 1. an outer mold; 11. a cavity; 12. a through hole; 2. a core mold; 21. a protrusion; 3. a first insert block; 4. a second insert block; 5. a powder layer.

Detailed Description

The present invention will be further described with reference to the following specific embodiments.

The utility model discloses an its structure of diamond bit can refer to chinese patent application number for: 201910652394.1 "a synthetic diamond bit material and a bit and a production process thereof", wherein the structure of the parts which are not related to the innovative part of the present application is not shown, and has no influence on the present application.

Example 1

As shown in fig. 1 and 2, a diamond bit mold of this embodiment includes an outer mold 1, a core mold 2, a first insert 3, and a second insert 4, and a diamond bit generates a large amount of heat during use, so in the design process of the diamond bit, the heat dissipation problem of the bit needs to be considered, and the end of the existing diamond bit is disposed in a manner of staggering diamond and water gaps (as shown in fig. 11, the gap position is a water gap), which makes the diamond bit solve the problem of the water gap, a diamond bit filling cavity is formed by using the outer mold 1 and the core mold 2, and the staggering arrangement of the first insert 3 and the second insert 4 is used to form the staggering arrangement of the diamond and the water gap of the diamond bit, which is easy for subsequent sintering process.

As shown in fig. 7 and 8, the outer mold 1 is a graphite mold, and the graphite mold has dual functions of a heating element and a mold support, and ensures good sintering of the diamond material of the wear-resistant layer. A cavity 11 is arranged in the middle of the outer die 1, and a through hole 12 is arranged in the middle of the cavity 11.

As shown in fig. 9 and 10, the core mold 2 is a graphite mold, and the graphite mold has dual functions of a heating element and a mold support, and ensures good sintering of the diamond material of the wear-resistant layer. The core mold 2 is cylindrical, one end of the cylindrical core mold 2 is provided with a bulge 21, the core mold 2 is arranged in the cavity 11 of the outer mold 1, and the bulge 21 of the core mold 2 is clamped and connected with the through hole 12. An annular gap is formed between the outer die 1 and the core die 2, the annular gap is in the shape of the main body of the diamond drill bit, the outer die 1 and the core die 2 are connected through the clamping between the protrusions 21 and the through holes 12, the dies can be easily disassembled, and the dies can be more easily installed and disassembled and are easy to use;

as shown in fig. 3 and 4, the first insert block 3 is a working layer block, and the first insert block 3 is an integrated insert block. The first insert 3 is used as a working layer and needs to be filled with diamond powder, and then sintering is carried out to form the diamond drill bit. One end of the first insertion block 3 is a plane, a plurality of insertion blocks matched with the diamond drill in shape are connected below the plane, and the plurality of insertion blocks are connected with the plane into a whole.

As shown in fig. 5 and 6, the second insert block 4 is a water gap block, and the second insert block 4 is an integrated insert block. The first insert 3 and the second insert 4 are in clearance fit and are alternately arranged in the annular clearance. The center of the second insert block 4 is annular and is sleeved with the core mold 2, the outer side of the annular is connected with a plurality of insert blocks matched with the shape of the water gap, and the insert blocks are connected into a whole through the middle annular.

First inserted block 3 and second inserted block 4 are the integral type inserted block, because the staggered arrangement of mouth of a river, so diamond portion and mouth of a river part on the drill bit can carry out the branch packing, accomplish diamond bit's preparation. First inserted block 3 and second inserted block 4 can use the annular steel with annular clearance assorted cutting in the manufacturing process, as shown in fig. 3-6, first inserted block 3 leaves the terminal surface plane, and second inserted block 4 leaves middle annular, can form two inserted block wholly, the part of loss in the cutting process for form clearance fit's relation between first inserted block 3 and the second inserted block 4, be convenient for follow-up two inserted block place.

The basic using method is that the outer die 1 and the core die 2 are sleeved, then the first insert 3 and the second insert 4 are put into the annular gap in the die after being staggered, then the first insert 3 is taken out, diamond powder (the sintered diamond powder is hard, the non-diamond powder is soft, and the grinding is convenient to form a water gap) is filled into a cavity formed between the second insert 4 and the core mold 2 and the outer mold 1, then compacting the powder, putting the powder into the first insert 3, taking out the second insert 4, filling the non-diamond powder into a cavity formed between the first insert 3 and the core mold 2 and the outer mold 1, the powder is then compacted to form a powder layer 5 as shown in figure 2, the powder is in the annular gap between the outer mould 1 and the core mould 2, and taking the first insert 3 and the second insert 4 out, sintering, and grinding the water gap part by the sintered drill bit to form the water gap.

Example 2

The diamond drill of this example was manufactured from the diamond drill mold of example 1.

The above examples describe the present invention and its embodiments, and the description is not intended to be limiting. It should be noted that, for those skilled in the art, without departing from the inventive concept of the present invention, the structural modes and embodiments similar to the technical solutions should be designed without creativity, and all shall fall within the protection scope of the present invention.

Claims (8)

1. A diamond bit mould which is characterized in that: the mold comprises an outer mold (1), a core mold (2), a first insert block (3) and a second insert block (4), wherein the core mold (2) is arranged on the inner side of the outer mold (1), an annular gap is formed between the outer mold (1) and the core mold (2), and the first insert block (3) and the second insert block (4) are placed in the annular gap in a staggered mode.

2. A diamond bit mold according to claim 1, wherein: a cavity (11) is arranged in the middle of the outer die (1), and a through hole (12) is arranged in the middle of the cavity (11).

3. A diamond bit mold according to claim 2, wherein: the core mold (2) is cylindrical, one end of the cylindrical core mold (2) is provided with a protrusion (21), the core mold (2) is arranged in a cavity (11) of the outer mold (1), and the protrusion (21) of the core mold (2) is clamped and connected with the through hole (12).

4. A diamond bit mold according to any one of claims 1 to 3, wherein: the outer die (1) and the core die (2) are made of graphite.

5. A diamond bit mold according to claim 4, wherein: the first inserting block (3) is a working layer block, and the first inserting block (3) is an integrated inserting block.

6. A diamond bit mold according to claim 5, wherein: the second inserting block (4) is a water gap block, and the second inserting block (4) is an integrated inserting block.

7. A diamond bit mold according to claim 6, wherein: the first insert block (3) and the second insert block (4) are in clearance fit.

8. A diamond drill bit, characterized by: made from a diamond bit mold according to any one of claims 1 to 7.

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