KR101470847B1 - Excavating tool insert, method of manufacturing the same and excavating tool - Google Patents

Abstract

In order to improve the durability and enhance the bonding force with the excavation tool, the present invention comprises a support layer having a first surface and a second surface, and an ultra hard layer formed on the first surface of the support layer, Wherein the first and second directions are perpendicular to each other and the thickness of the support layer and the super hard layer is different from the thickness of the first and second hard layers, And a maximum length in the first direction is less than a maximum length in the second direction, a method of manufacturing the same, and an excavation tool.

Description

TECHNICAL FIELD The present invention relates to an insert for an excavation tool, a method of manufacturing the same, and an excavating tool.

The present invention relates to an insert for an excavation tool, a method of manufacturing the same and an excavation tool, and more particularly to an insert for an excavation tool, a method of manufacturing the same, and an excavation tool capable of improving excavation capability and improving durability of the excavation tool.

An insert for an excavation tool is used to perform an excavation operation that is coupled to a tool assembly used for oil well drilling or the like and carves out rocks and the like existing in the ground. The insert for an excavation tool includes a columnar support member and an ultra hard layer formed at one end of the support member.

A supporting member is formed by a method such as a sintering process using a tungsten-based material, and a diamond or the like, which is a material of the super hard layer, is put into a predetermined mold in a powder form in order to form an ultra hard layer on the support member, And sintering is performed in a sintering furnace at a high temperature and a high pressure to form the support member and the super hard layer integrally with each other.

The inserts for excavation tools are typically used with a plurality of blades mounted on the blades of the excavation tool. A plurality of inserts are connected to a socket of a blade or the like. The excavation tool is subjected to a large pressure during the excavation work, and the socket or the like for receiving the insert may be damaged. Particularly, since the inserts are each disposed in the socket, breakage of the portion corresponding to the boundary portion between the inserts in the portion of the blade is prone to occur. In addition, since the columnar inserts are disposed, the size of the insert is limited and the drilling efficiency is reduced.

The present invention can provide an insert for an excavation tool, a method of manufacturing the same, and a drilling tool capable of improving excavation ability and improving durability of the excavation tool.

The present invention relates to a laminate comprising a support layer having a first side and a second side and an ultra hard layer formed on the first side of the support layer, Wherein the thickness of the support layer and the super hard layer is smaller than the maximum length of the first direction and the second direction, Wherein the maximum length in one direction is less than the maximum length in the second direction.

In the present invention, a plurality of projections may be formed at one end of the first direction.

In the present invention, the projections may be triangular or semicircular.

In the present invention, the other end in the first direction may include a curved surface.

In the present invention, the second surface of the support layer may comprise a bond to engage with an excavation tool.

According to another aspect of the present invention there is provided a blade comprising a body, a plurality of blades formed in the body, and an insert attached to the blade, the insert comprising a support having a first side and a second side, Wherein the super hard layer has a first direction and a second direction that are in the form of a flat plate and are perpendicular to the thickness direction of the super hard layer and are coplanar, Wherein the thickness of the support layer and the super hard layer is smaller than the maximum length in the first direction and the second direction and the maximum length in the first direction is smaller than the maximum length in the second direction. .

In the present invention, the insert may include a plurality of protrusions at one end in a direction away from the body portion.

In the present invention, the insert may include a curved surface corresponding to the blade.

According to another aspect of the present invention, there is provided a method of manufacturing a semiconductor device, comprising: forming a first member for a support layer; joining a second member for the super hard layer on the first member to form a planar sintered body; Wherein the insert comprises a support layer having a first side and a second side and an ultra hard layer formed on the first side of the support layer, And a first direction and a second direction which are perpendicular to the thickness direction of the super hard layer and coplanar with each other, wherein the first direction and the second direction are perpendicular to each other, And the maximum length of the first direction is smaller than the maximum length of the second direction. The method of manufacturing an insert for an excavation tool according to claim 1, The.

An insert for an excavation tool, a method of manufacturing the same, and an excavation tool according to the present invention provide an insert for an excavation tool having improved excavation capability and improved durability, a method of manufacturing the same, and an excavation tool.

It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a perspective view showing an insert for an excavation tool according to an embodiment of the present invention, and Fig. 2 is a cross-sectional view taken along line II-II in Fig. 3 is a plan view seen from direction A of Fig.

1 to 3, an insert 10 for an excavation tool according to an embodiment of the present invention includes a support layer 11 and an ultra hard layer 21.

The insert 10 for an excavation tool is generally formed in the form of a flat plate. The insert 10 for an excavation tool has a first direction X and a second direction Y on the same plane perpendicular to the thickness direction Z, the thickness direction Z, and the like. Typically, the second direction Y corresponds to the longitudinal direction of the insert 10 for the excavation tool. The first direction X and the second direction Y are orthogonal to each other. The thickness t of the insert 10 for the excavation tool is formed to be smaller than the maximum length Lx of the first direction X and the maximum length Ly of the second direction Y.

The support layer 11 has a first surface 11a and a second surface 11b. The flat insert 10 may be formed to 2 to 20 millimeters. If it is too thin, its durability will be weakened during excavation and the lifetime will be reduced. However, if it is too thick, it is not easy to manufacture the insert 10 by cutting the flat plate in a manufacturing process to be described later, and the bonding force is weakened when engaged with the excavation tool, so that it is formed to be 20 mm or less.

The super hard layer 21 is formed on the first surface 11a of the support layer 11a. The support layer 11 may comprise a cobalt-based tungsten carbide (WC-Co) alloy.

The super hard layer 12 may comprise diamond or cubic boron nitride. In particular, the strength can be improved by including polycrystalline diamond. The super hard layer 12 is formed of a material having a hardness higher than that of the support layer 11 to perform the excavation process.

The super hard layer 12 may be between 0.5 and 3 millimeters. Since the super hard layer 12 is a part for performing the excavation process, if it is too thin, its durability is weakened. Therefore, it is formed at 0.5 mm or more. However, if the sintered body is excessively thick, it is not easy to cut the sintered body in the plate form in the subsequent process, and the bonding strength with the support layer 11 is weakened.

A plurality of projections (15) are formed at one end of the insert (10) in the first direction (X). The plurality of projections 15 form a cutting edge at the time of excavation. When the plate-like insert 10 is formed, the cutting edges are continuously formed so that the cutting efficiency is improved. In the case of forming a plurality of the protrusions, the length of the cutting edge is further extended. Referring to FIG. 1, a semicircular protrusion 15 is formed at one end of the first direction X. As shown in FIG. Referring to FIG. 1, four protrusions 15 are formed. However, the number of the projections 15 is not limited thereto. Also, the shape of the insert 10 for a flat-type excavation tool is not limited to this. During the excavation process, the super hard layer (12) is brought into contact with the rock, etc., and the work is performed. At this time, the shape and the number of the protrusions 15 can be adjusted in consideration of the frictional force received by the material contacting the ultra hard layer 12, the discharge of the excavated material, and the like.

The other end of the insert 10 for the drill bit in the first direction X may comprise a curved surface. The other end in the first direction X may include a curved surface so as to be curved inward. In a subsequent process, the insert 10 is attached to the excavation tool. The blade of the excavation tool may be formed as a curved surface and may include a curved surface in a second direction Y to facilitate attachment to such a blade and the other end in the first direction X to curve inward. Is attached to the excavation tool. The blade of the excavation tool is formed as a curved surface, and one end of the second direction Y is formed to be curved and particularly curved inwardly so as to be easily joined to the blade.

4 is a bottom view seen in direction B of Fig. Referring to FIG. 4, the second surface 11b of the support layer 11 includes a joint 13 for engaging with a drilling tool. The bonding portion 13 may have an area equal to or smaller than the second surface 11b. Since the insert 10 for the drill tool is formed in the form of a flat plate, the joint 13 can also include a wide plane. If the joint 13 includes a wide plane, the coupling strength between the insert 10 for the excavation tool and the excavation tool can be enhanced to prevent the excavation tool insert 10 from being detached and broken from the excavation tool .

5 and 6 are views showing a method of manufacturing the insert for the excavation tool of FIG. Referring to Fig. 5, a sintered plate 20 is prepared for manufacturing an insert for an excavation tool. The sintered plate 20 includes a first member 21 and a second member 22.

First, the first member 21 in the form of a flat plate is prepared. The first member (21) is a member for the support layer (11). One side of the first member 21 is engaged with the excavation tool in a subsequent process. The first member 21 may comprise a cobalt-based tungsten carbide (WC-Co) alloy.

Powder capable of forming the second member 22 is laminated on the first member 21. The second member (22) is a member for the super hard layer (12). The second member 22 may comprise diamond or cubic boron nitride. In particular, the strength can be improved by including polycrystalline diamond. Thereafter, the sintered body is sintered in a sintering furnace at a high temperature and a high pressure to integrally join the first member 21 and the second member 22 to form a sintered plate 20. FIG. 5 shows a circular sintered plate 20, but the present invention is not limited thereto. That is, the sintered plate 20 may be elliptical or polygonal.

Referring to FIG. 6, the sintered plate 20 is cut to form the insert 10 for the drilling tool shown in FIG. The cutting operation shown in Fig. 6 can be performed using a wire EDM (electrical discharge machine). It is also possible to grind the sintered plate 20 to form the insert 10 for the excavation tool and cut the sintered plate 20 into the desired shape using various other methods to separate the insert 10 for the excavation tool have.

The sintered plate 10 may have a thickness of 50 to 300 millimeters. The size of the sintered plate 10 must be large so that the size of the insert 10 can be increased. 50 mm or more. However, it is formed to match the size of the blade for attachment to the blade of the excavation tool. That is to say at least less than the length of the blade, so that the insert can be attached to the blade, so that it is formed to be less than 300 millimeters in accordance with the size of the blade normally used. Although one insert 10 is formed on the sintered plate 20 in the drawing, it is possible to form a plurality of inserts 10 according to the size of one sintered plate 20.

7 is a schematic cross-sectional view showing an insert for an excavation tool according to another embodiment of the present invention. Hereinafter, differences from the above-described embodiment will be mainly described.

The insert 30 for the excavation tool is formed in the form of a plate as a whole. The insert 30 for the drill tool comprises a support layer 31 and an ultra hard layer 32. The super hard layer 32 is formed on the support layer 31.

The insert tool insert 30 has a first direction X and a second direction Y coplanar to the thickness direction Z. The first direction X and the second direction Y are perpendicular to each other. And includes a plurality of projections (35) at one end of the first direction (X). Referring to FIG. 7, four triangular protrusions 35 are formed at one end of the first direction X. As shown in FIG. The number of the projections 35 is not limited thereto.

The other end of the insert 30 for the drill bit in the first direction X may comprise a curved surface. The other end in the first direction X may include a curved surface so as to be curved inward. In a subsequent process, the insert 30 is attached to the excavation tool. The blade of the excavation tool is formed into a curved surface, and one end of the second direction Y is formed to be curved and particularly curved inwardly so as to be easily joined to the blade.

Although not shown, the insert for the excavation tool of the present embodiment also includes a joint capable of engaging with the excavation tool on the bottom surface of the support layer 31 as in Fig.

5 and 6, the insert 30 for the excavation tool of the present embodiment can be manufactured using the above-described method.

Fig. 8 is a schematic perspective view showing an excavation tool according to an embodiment of the present invention, and Fig. 9 is a plan view seen from CL in Fig.

The excavation tool 100 includes a body portion 110, a blade 120, and an insert 130. The excavation tool may be a drill bit as shown in Fig. The body portion 110 of the excavation tool 100 has a body surface 112 on the outside. The shank 160 is disposed at one end of the body 110 to facilitate coupling with other members.

The body portion 110 includes a plurality of blades 120 formed radially from CL, which is the center axis of the excavation tool 100. The blade 120 is formed to protrude from the body 110. The blade 120 may be formed to extend without separating from the upper end to the lower end of the body 110 as shown in FIG. Although the six blades 120 are shown in Figs. 8 and 9, the number of the blades 120 is not limited thereto, and may vary depending on process conditions and other conditions of use

The blade (120) is attached with an insert (130). The insert 130 includes a support layer 131 and an ultra hard layer 132. The insert 130 is generally formed in a flat plate shape. The super hard layer 132 is formed on the support layer 131. The support layer 131 may include a cobalt-based tungsten carbide (WC-Co) alloy. The super hard layer 132 may comprise diamond or cubic boron nitride. In particular, the strength can be improved by including polycrystalline diamond. The super hard layer 132 is formed of a material having hardness higher than that of the support layer 131 to perform the excavation process.

The insert 130 has a first direction X and a second direction Y on the same plane perpendicular to the thickness direction of the insert. The second direction (Y) is generally the longitudinal direction of the insert (130). The first direction X and the second direction Y are perpendicular to each other. The insert 130 includes a plurality of protrusions 135 in a first direction X. As shown in FIG. Referring to FIG. 8, a semicircular protrusion 135 is formed at one end of the first direction X. As shown in FIG. The protrusion 135 is formed at one end in the direction away from the body portion 110. [ Referring to FIG. 8, four protrusions 15 are formed, but the number is not limited thereto. Also, the shape of the insert 135 is not limited thereto. The super hard layer 132 comes into contact with the rock mass during the excavation process. At this time, the shape and the number of the protrusions 135 can be adjusted in consideration of the frictional force received by the material contacting with the super hard layer 132 d, the discharge of the excavated material, and the like.

The other end in the first direction X may include a curved surface. The other end in the first direction X may include a curved surface so as to be curved inward. The insert 130 is attached to the blade 120. The blade 130 protrudes from the body 110 in a curved shape. One end of the insert 130 is formed to include a curved surface so as to correspond to the blade 130 so that the blade 120 and the insert 130 are easily joined.

As shown in FIG. 4, the insert 130 includes a joint portion that can engage with the blade 120 on the bottom surface of the support layer 131, though not shown. The blade 120 and the insert 130 may be joined using welding. The insert 130 can be formed using the method shown in Figs. 5 and 6. Needless to say, the triangular projection of FIG. 7 can also be formed.

A nozzle 140 is formed on the body surface 140 of the body 110. A liquid such as a lubricating solution is ejected from the nozzle 140. The excavation material generated during excavation is easily discharged through the discharge portion 150 formed in the body portion 110.

Since the insert 130 is engaged with the excavation tool 100 to perform the excavation work in contact with the underground rock, etc., the support layer 131 and the ultra hard layer 132 are worn and replaced over time due to contact with the rock, . Also, as time passes, the coupling force between the blade 120 and the insert 130 is weakened due to the frictional force between the insert 130 and the excavation material. However, the insert 130 of the present invention is formed in the shape of a flat plate, so that the area of bonding with the blade 120 is increased and the bonding force is also enhanced. As a result, damage due to separation of the insert 130 and the blade 120 can be prevented.

Also, if the insert 130 is formed in a flat plate shape, it can be formed in a large size, so that one insert 130 can be disposed on the blade 120. If a plurality of small inserts are formed, a portion of the blade corresponding to the space between the inserts is formed, and the wear of the portion is severe. However, the present invention may form the insert 130 in the form of a plate extending in correspondence with the blade 120 to prevent wear of the blade 120, thereby extending the overall life of the excavation tool 100.

The blade 120 of the present invention may have a socket, but the insert 130 may be disposed without a separate socket. Conventional inserts are formed in a columnar shape, so that the blade has a socket for receiving a plurality of inserts. However, the insert 130 of the present invention can be formed in a flat plate shape and directly attached to the blade 120, simplifying the process.

The excavation tool 100 of the present invention is capable of attaching various types of inserts. Figs. 10-12 illustrate other variations of inserts attached to drilling tools in accordance with an embodiment of the present invention. Fig. For convenience of description, only the structure of one blade 120 and the insert 130 shown in Fig. 8 is shown.

Referring to FIG. 10, the first insert 230 and the second insert 231 are disposed to correspond to the blade 220. Although not shown in the drawings, the inserts may be formed by a plurality of at least two inserts. The number of inserts can be adjusted according to the size of the blade 120. [

8, the inserts 230 and 231 are formed so as not to protrude to the outer periphery of the blade 220. As shown in FIG. That is, the blade 220 has a curvature corresponding to the protrusions formed on the inserts 230 and 231. As a result, the blade 220 is formed to correspond to the outline of the protrusions of the inserts 230, 231.

It is also possible to join the inserts 230 and 231 with the blade 220 so that the protrusions of the inserts 230 and 231 protrude to the outer periphery of the blade 220 by a predetermined length.

The first insert 230 and the second insert 231 are disposed in close contact with each other. The first insert 230 and the second insert 231 are brought into close contact with each other to improve the durability of the blade 220 during excavation.

Conventional inserts are formed in a columnar shape and columnar inserts are coupled to the blades. There is a spaced space between the inserts because the columnar inserts are coupled to the blades. The surfaces of the blades corresponding to the gaps between such inserts were susceptible to damage during excavation.

However, when the flat first inserts 230 and the second inserts 231 are formed as in the present embodiment, it is easy to closely contact the first inserts 230 and the second inserts 231 so as to eliminate the gap therebetween. As a result, the ability to prevent damage to the blade 220 is improved.

Referring to FIG. 11, one insert 330 is bonded to the blade 320. 8, it is shown that the projection 335 of the insert 330 does not protrude outward so as to correspond to the outer edge of the blade 320. As shown in Fig. Needless to say, one end of the protrusion 335 of the insert 330 may be slightly extended to the outer periphery of the blade 320 although not shown.

Referring to FIG. 12, the insert 430 is formed in a plate shape, but no protrusions are formed. The insert 430 is formed to have one end extended to correspond to the shape of the blade 420. The insert 430 and the outer edge of the blade 420 are formed so as to correspond to each other so that the insert 430 is not projected to the outer surface of the blade 420.

Although not shown, the inserts 430 may also be formed as multiple as shown in FIG. 10 or may be formed to have a smaller width than the blades 420 as shown in FIG.

1 is a perspective view showing an insert for an excavation tool according to an embodiment of the present invention.

2 is a cross-sectional view taken along line II-II in FIG.

3 is a plan view seen from direction A of Fig.

4 is a bottom view seen in direction B of Fig.

5 and 6 are views showing a method of manufacturing the insert for the excavation tool of FIG.

7 is a schematic cross-sectional view showing an insert for an excavation tool according to another embodiment of the present invention.

8 is a schematic perspective view showing an excavation tool according to an embodiment of the present invention.

9 is a plan view seen from CL in Fig.

Figs. 10-12 illustrate other variations of inserts attached to drilling tools in accordance with an embodiment of the present invention. Fig.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

10, 30, 130, 230, 330, 430: inserts for drilling tools

11, 31, 131: Support layer

12, 32, 132: super hard layer 13:

15, 35: projections 20: sintered plate

21: first member 22: second member

100: excavation tool 110: body part

112: body surface 120, 220, 320, 420: blade

140: nozzle 150:

160: Shank

Claims (13)

A support layer having a first side and a second side; And And an ultra hard layer formed on the first side of the support layer, And a first direction and a second direction which are perpendicular to the thickness direction of the super hard layer and are coplanar, wherein the first direction and the second direction are perpendicular to each other, and the support layer and the ultra hard layer Is less than the maximum length in the first direction and the second direction, the maximum length in the first direction is smaller than the maximum length in the second direction, A plurality of protrusions are formed at one end of the support layer and the super hard layer in the first direction, protrusions adjacent to each other of the plurality of protrusions are formed apart from each other, And a curved surface curved in the same direction as the protruding direction of the plurality of protrusions at the other end of the support layer and the super hard layer in the first direction. delete The method according to claim 1, Wherein said projection is triangular or semicircular. delete The method according to claim 1, And said second side of said support layer comprises a bond to engage with an excavation tool. A body portion; A plurality of blades formed on the body portion; And And an insert attached to the blade, Wherein the insert has a support layer having a first side and a second side and an ultra hard layer formed on the first side of the support layer, the insert being formed in a flat plate shape and being perpendicular to the thickness direction of the ultra hard layer and on the same plane Wherein the thickness of the support layer and the super hard layer is smaller than the maximum length of the first direction and the second direction, The maximum length in one direction is smaller than the maximum length in the second direction, A plurality of protrusions are formed at one end of the support layer and the super hard layer in the first direction, protrusions adjacent to each other of the plurality of protrusions are formed apart from each other, And the other end of the support layer and the super hard layer in the first direction is formed as a curved surface curved in the same direction as the protruding direction of the plurality of protrusions. delete The method according to claim 6, Wherein the blade is formed to have a curvature corresponding to the projection. The method according to claim 6, Wherein said projection is triangular or semicircular. The method according to claim 6, Wherein the curved surface of the insert is formed to correspond to the blade. The method according to claim 6, And the second side of the support layer comprises a bond to bond with the blade. The method according to claim 6, Wherein a plurality of inserts are arranged to correspond to each of the blades. 13. The method of claim 12, Wherein the adjacent inserts of the plurality of inserts are disposed in intimate contact.

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