KR100668090B1 - Production method and that burnishing drill of the burnishing drill which has all the diamond bite. - Google Patents

Abstract

The burnishing method and the burnishing drill having the diamond bite of the present invention mutually cross the outer surface of the surface of the tip 110 around the center S of the pair of tip 110 of the burnishing drill 100. The discharging surface 124 at the distal end angle processing step (S10) and the drill blade (110a) formed on any one of the distal end portion (100) having a large angle among the pair of distal end portions (110) for processing differently The front seating groove (130a) is formed at the same angle as the front end portion 110 on the side, and the other end of the tip portion 100 of the other drill tip (100a) having a small angle of the tip end 110 on the discharge surface 124 side Seating surface processing step (S20) to form a rear seating groove (130b) at a different angle with the pair of pre-seating groove (130a) and the rear seating groove (asymmetrical mutual processing angle of the burnishing drill 100) ( Carbide 140b and diamond 140a to be coupled to 130b and the diamond bite 140 in which the diamond 140a is integrally seated. Diamond bite processing step (S30) for processing in the same shape as 0), and the position setting step for seating the silver lead 135 in the seating groove 130 and the diamond bite 140 is superimposed on the upper surface (S40) And a flux of flux on the surface of the silver lead 135 and the diamond bite 140 and then applying heat to integrally bond the diamond bite 140 to the seating groove 130 of the burnishing drill 100. Welding step (S50) and the diamond bite 140 partially exposed to the outside before and after the mounting groove (130a, 130b) at the same angle and size as the tip 110 of the burnishing drill 100 at the same time diamond Cutting edge polishing step (S60) for processing the cutting edge portion 141 to the tip of the bite 140, and the front seating groove 130a to minimize the stress concentrated on the vertex 143 of the diamond bite 140 Diamond bite (140) section Tip margin that gives the tip margin angle 142 by α angle so as to be symmetrical to the vertex 143 of the burnishing drill 100 on the side of the diamond bite 140 bonded to the vertex of the blade 141 and the rear seating groove 130b. Each machining step (S70) and the outer edge of each diamond bite 140 to prevent brittleness of the diamond bite 140 bonded to the front and rear seating grooves (130a, 130b) of the burnishing drill 100 It is assumed that the curved surface processing step (S80) to form a curved surface 144 to be symmetrically rounded.

Description

Manufacture method and that burnishing drill of the burnishing drill which has all the diamond bite.

1 is a front view showing a drill, boring, burnishing drill according to the prior art.

Figure 2 is a front view showing a burnishing drill according to the prior art.

3 is a plan view showing a burnishing drill according to the prior art

4 is a process chart showing a method of processing a burnishing drill having a diamond cutting edge according to the present invention;

a) A front view showing a tip angle machining step of processing the tip angle of the burnishing drill.

b) a front view showing the seat surface processing step in the burnishing drill.

c) a front view showing a machining step of a diamond bite to be bonded to a seating groove of the burnishing drill;

d) A front view showing the position setting step for seating the silver lead and the diamond bite in the seating groove;

e) Front view showing a welding step of joining silver lead and diamond bite to a seating groove by applying heat.

f) A front view showing a polishing step of working the surface of the diamond bite bonded to the burnishing drill.

g) a front view showing a grinding edge grinding step of processing the grinding edge at the diamond leading edge angle;

h) a front view showing a curved surface machining step of machining both edges of the diamond bite into curved surfaces;

5 is an exploded perspective view showing a burnishing drill having a diamond bite according to the present invention.

Explanation of symbols on the main parts of the drawings

10: workpiece 11: hole

20: Drill 30: Boring

100: burnishing drill 110: distal end

110a: drill blade 112: inclined surface

120: drill body 121: discharge pocket

122: guide surface 123: shank

124: discharge surface 125: chisel

130: seating groove 130a: front seating groove

130b: rear seating groove 135: silver lead

140: Diamond Bite 140a: Diamond

140b: carbide 141: cutting edge

142: tip margin 143: vertex

144: surface S: center

The present invention relates to a method of manufacturing a burnishing drill having a diamond bite of the present invention and a burnishing drill thereof, and more particularly, a vertex of a diamond bite having a diamond bit attached to a distal end of the burnishing drill and having a tip clearance angle burned. Manufacturing method of burnishing drill with diamond bite to improve precision and surface view of inner circumference of hole by single hole machining in repetitive hole processing in high strength workpiece by eccentric bonding to drill center And the burnishing drill.

Burnishing hole processing is a machining method which obtains a highly accurate surface by rotating and pressing a tool larger than the inner diameter at the time of inner surface machining of a cylinder.

As shown in FIG. 1 or FIG. 3, in order to drill a precise hole in a workpiece having high strength, a three-step machining method using a drill is generally performed.

First, in order to drill the primary hole, a boring operation is performed in which a primary hole is drilled through a drill 20 having a conventional high speed steel material, and the inner diameter of the hole 11 obtained in the pre-processed state is precisely machined in diameter and surface. After roughing, the drilling drill 100 has been commonly used to ensure the accuracy of the hole, surface and uprightness.

For example, in order to process the hole 11 in the unit of micron (± 0.01 μm) while machining into the hole 11 having a diameter of 20 mm, the hole 11 is formed in the workpiece 10 through the drill 20 having a diameter of 19 mm. After drilling), add the precision of the inner diameter of the hole 11 so that the diameter of the hole 11 can be increased by 0.7 mm through the boring drill 30 having a diameter of Φ19.7mm, and then Φ19.7mm Through the burnishing drill 100 having a diameter of Φ 20 mm so as to widen 0.3 mm in the diameter of the hole 11, the hole 11 having a diameter of 20 mm is drilled.

As described above, the precision hole drilling method according to the prior art is a diameter of the drill by the inaccurate diameter of the workpiece through the repetitive hole processing after the hole 11 through the drill 20 of the general high-speed steel first And a secondary drill having a size close to the hole 11 having a desired diameter through boring to secure the surface view, and then a cylindrical drill body which is generally made of cemented carbide (WC) material and connected to the shank 123 ( Two drill blades 110a having predetermined cutting edges 111 are formed at the tip end portion 110 of the 120, and an inclined surface is formed on the rear side in the rotational direction from these drill blades 110a. The guide surface 122 extends in the axial direction at the edges of these inclined surfaces, and the discharge surface extends in the axial direction on the front side in the rotational direction of these guide surfaces 122 to ensure the burnishing drill 100 of which the uprightness is guaranteed. Through this, the precision, uprightness and surface of the inner circumference of the hole are processed to the desired dimensions.

However, the hole processing process according to the prior art in the processing of the hole 11 through the drill 20, the boring ring 30 and the burnishing drill 100, which is a three-step process, when each process is finished to the next process In order to prepare, there is a problem that the drill replacement work is cumbersome and the work process is complicated and the efficiency of hole processing is reduced.

In addition, the drill 10, boring ring (30), burnishing drill 100 that is repeatedly replaced in the drilling machine to induce a chattering vibration when cutting the hole, it is difficult to expect accurate hole processing as well as after drilling Due to the difficulty in accurately matching the center of the boring ring 30 and the burnishing drill 100 to the inner circumference of the machined hole 11, there is a problem of lowering the precision of hole processing.

Further, the inclination angle of the drill 20 is generally 118 ° and in the case of the burnishing drill 100 of cemented carbide, the angle is about 140 °.

At this time, there is a problem that the precision of the inner diameter processing of the hole 11 is inferior due to the difference in the inclination angle of the drill 20 and the burnishing drill 100 having different inclination angles.

In addition, as the drill 20 is repeatedly used, the wear of the drill 20 and the chipped chips of the workpiece 10 are fused by high heat generated at the tip of the drill 20, causing wear of the drill 20. At the same time, as the roughness of the inner circumference of the hole 11 of the workpiece 10 is caused, the cutting safety is greatly reduced, thereby shortening the life of the drill.

Therefore, the main object of the present invention is to bond the diamond cutting blade to the burnishing drill to burn the drill having a diamond bite to increase the efficiency of the process by simplifying the hole processing process without the need to replace the drill for precise hole drilling Is to provide.

In addition, another object of the present invention is to bond the diamond bite with excellent hardness to the burnishing drill, but the vertex of the diamond cutting edge when drilling the hole by giving a curved edge α angle and both sides of the corner to the cutting edge side of the diamond cutting edge The present invention provides a burnishing drill having a diamond cutting edge that minimizes stress concentrated at edges and corners, thereby preventing diamond embrittlement and ensuring accurate hole internal diameter.

In addition, another object of the present invention is to provide a burnishing drill having a diamond cutting edge that can maximize the precision of the hole machining is not fused to the diamond cutting edge with a high hardness and the tip margin angle It is.

In addition, the final object of the present invention is to complete the hole processing with precision and excellent surface finish through a burnishing drill having one diamond bite, integrating the application number of the drill for precision machining into one, In order to reduce the processing cost.

In order to achieve the above object, the manufacturing method of the burnishing drill provided with the diamond bite of the present invention, and the burnishing drill are made of cemented carbide and are connected to the shank-shaped drill body connected to the shank with a pair of tip ends centered around the chisel. Two drill blades having a predetermined cutting edge angle are formed at the center of the center of the shaft core tip, an inclined surface is formed on the rear side in the rotational direction from these drill blades, and a guide surface extends in the axial direction from the edges of these inclined surfaces, In the burnishing drill formed so that the discharge surface for discharging the workpiece chip on the front side in the rotational direction of the guide surface extending in the axial direction,

A tip angle machining step of processing the outer surface of the tip portion differently around a pair of tip portion centers of the burnishing drill, and a drill formed at one of the tip angles of the pair of tip portions having different angles. The seating surface processing step of forming the front seating groove on the lower side of the discharge side at the same angle as the tip end, and forming the rear seating groove on the other side of the other end drill bit having a smaller angle on the discharge side at an angle different from the angle of the front end side. And a diamond bite processing step of processing diamond bites in which cemented carbide and diamond are integrally superimposed on a pair of front seating grooves and rear seating grooves of which the mutual processing angles of the burnishing drills are asymmetrically formed into the same shape as the seating grooves, respectively. And, the position setting step for seating the silver lead in the seating groove and the diamond bite on the upper surface And a welding step of applying the flux of the solvent function to the surface of the silver lead and the diamond bite and then applying heat to integrally bond the diamond bite to the seating groove of the burnishing drill, and the diamond bite partially exposed to the outside of the seating groove before and after. At the same angle and size as the tip of the burnishing drill, and at the same time the cutting edge is polished to the cutting edge of the diamond bite, and is joined to the front seat groove to minimize stress concentrated at the vertex of the diamond bite. End clearance angle machining step that gives the tip clearance angle α angle so as to be symmetrical with the vertex of the diamond bite cutting edge of the diamond bite and the vertex of the burnishing drill on the side of the diamond bite, and the front and rear seats of the burnishing drill Each die to prevent brittleness of the diamond bite bonded to the groove Characterized in that the curved surface forming step to form a curved surface symmetrically rounded to the outer edge of the almond bite.

In addition, two drill blades having a predetermined cutting edge are formed at the center of the axial center tip at a pair of distal ends of the cylindrical drill body which is made of cemented carbide and connected to the shank with the chisel as the center. An inclined surface is formed on the rear side in the rotational direction, and guide surfaces extend in the axial direction from the edges of these inclined surfaces, and a burnishing drill in which the discharge surface for discharging the workpiece chips on the front side in the rotational direction of these guide surfaces extends in the axial direction. To

A front seating groove formed at the same angle with the tip from the drill blade formed at the edge of the tip side of the large angle to the lower side of the discharge surface by grinding the tip angles located at one side of the chisel among the pair of burnishing drills differently; And a seating groove, a silver lead seated on the inner surface of the seating groove, after cutting from the drill edge to the outer periphery of the burnishing drill on the discharge surface of the other end portion on the opposite side where the front seating groove is formed; The diamond superimposed integrally with the cemented carbide is processed in the same shape as each seating groove so as to be seated on the front seating groove and the rear seating groove formed at different angles at the tip of the burnishing drill. It is characterized by comprising the diamond bite bonded to the drill.

Also, to minimize the stress concentrated at the vertex of the diamond bite, the cutting edge part of the diamond part of the diamond bite bonded to the front seat groove and the burnishing drill vertex of the diamond bite side bonded to the back seat groove are mutually symmetrical. It is configured to form a curved surface at the edge of the diamond bite located on the outer periphery of the burnishing drill while at the same time giving the tip margin angle by the α angle.

Further, the tip angle of the tip portion where the front seating grooves are formed among the pair of tip ends of the burnishing drill is polished to 120 °, and the tip angle of the tip portion where the rear seating grooves are formed to be polished to 118 °.

In order to achieve the above object, a burnishing drill manufacturing method and a drill having a diamond bite of the present invention will be described in more detail with reference to the accompanying drawings.

 Figure 4 is a process diagram showing a method of processing a burnishing drill having a diamond cutting edge according to the present invention, a) a front view showing a tip angle machining step of processing the tip angle of the burnishing drill, b) the burnishing drill C) a front view showing a machining step of a diamond bite to be bonded to a seating groove of the burnishing drill, and d) a front view showing a position setting step of seating lead and diamond bite on a seating groove. E) a front view showing the welding step of joining the silver lead and the diamond bite to the seating groove by applying heat, and f) a front view showing the polishing step of processing the surface of the diamond bite bonded to the burnishing drill, g ) Is a front view showing a step margin grinding step for processing a tip clearance angle to the diamond tip vertex angle, and h) the diamond bite FIG. 5 is an exploded perspective view showing a burnishing drill having a diamond bite according to the present invention. FIG.

As shown in FIG. 4 or FIG. 5, the method of manufacturing the burnishing drill having the diamond bite of the present invention and the burnishing drill are made of cemented carbide and connected to the cylindrical drill body 120 connected to the shank 123. Two drill blades 110a having a predetermined cutting edge angle are formed at the center of the shaft center tip at a pair of tip portions 110 partitioned into the center, and inclined surfaces are provided on the rear side in the rotational direction from these drill blades 110a. 112 is formed and the guide surface 122 extends in the axial direction from the edges of these inclined surfaces 112, and the discharge surface 124 for discharging the workpiece chip on the front side in the rotational direction of these guide surfaces 122 is the axial direction. In the burnishing drill 100 formed to extend upright,

Tip angle machining step (S10) for processing the outer surface of the front end portion 110 with respect to the center of the pair of tip portion 110 of the burnishing drill 100 different from each other (S10), as long as the angle is different The front seating groove 130a is formed at the same angle as the tip portion 110 at the lower side of the discharge surface 124 in the drill blade 110a formed on the tip portion 100 having a large angle among the pair of tip portions 110. The mounting surface processing step of forming a rear seat groove 130b at a different angle from the angle of the front end portion 110 on the discharge surface 124 on the other end portion 100 of the drill blade 100a having a smaller angle on the opposite side ( S20) and the cemented carbide 140b and the diamond 140a to be integrally overlapped with the pair of pre-seating groove 130a and the post-seating groove 130b which are mutually unsymmetrical processing angles of the burnishing drill 100 are integrally overlapped. Diamond bite processing step (S30) for processing the diamond bite 140 to the same shape as the seating groove 130, respectively, Positioning step (S40) for seating the silver lead 135 in the seating groove 130 and the diamond bite 140 is superimposed on the upper surface and the surface of the silver lead 135 and diamond bite 140 of the solvent function After the flux is applied, the welding step (S50) of integrally bonding the diamond bite 140 to the seating groove 130 of the burnishing drill 100 by applying heat, and outside the seating grooves 130a and 130b before and after The cutting edge polishing step of processing the diamond bite 140 partially exposed to the same angle and size as the tip end portion 110 of the burnishing drill 100 and simultaneously processing the cutting edge part 141 at the tip of the diamond bite 140. (S60) and the cutting edge portion 141 of the diamond bite 140 cutting edge 141 bonded to the front seating groove (130a) to minimize the stress concentrated on the vertex 143 of the diamond bite 140 (S60) On the side of the diamond bite 140 bonded to 130b). Tip clearance angle processing step (S70) to give a single clearance angle 142 by α angle so as to be symmetrical to the vertex 143 of the burnishing drill 100, and the front and rear seating grooves of the burnishing drill 100 ( Surface processing step (S80) to form a curved surface 144 to be symmetrically rounded to the outer peripheral edge of each diamond bite 140 to prevent brittleness of the diamond bite 140 bonded to 130a, 130b do.

In addition, a pair of distal ends 110 partitioned about the chisel 125 in a cylindrical drill body 120 made of cemented carbide and connected to the shank 123 has a predetermined cutting edge angle at the center of the axial center end. Two drill blades 110a are formed, and the inclined surface 112 is formed on the rear side of the rotation direction from these drill blades 110a, and the guide surface 122 is extended in the axial direction from the edge of these inclined surfaces 112. In the burnishing drill 100 is formed so that the discharge surface 124 for discharging the workpiece chip on the front side in the rotational direction of these guide surface 122 is extended in the axial direction,

The discharge surface 124 from the drill blade (110a) formed at the edge of the tip portion 110 of the large angle by grinding the tip angles located on one side of the chisel among the pair of tip portion 110 of the burnishing drill 100 differently ) Drilling blade 110a on the discharge surface 124 of the front seating groove 130a formed at the same angle as the front end 110 and the other front end 110 on which the front seating groove 130a is formed. ) After cutting at a different angle from the tip 110 to the outer periphery of the burnishing drill 100, the seating groove 130a, the silver lead 135 seated on the inner surface of the seating groove 130, and the burnishing The diamond 140a integrally overlapped with the cemented carbide 140b so as to be seated in the front seating groove 130a and the rear seating groove 130b formed at different angles in the tip portion 110 of the drill 100, each seating groove ( 130) and the diamond bonded to the burnishing drill 100 by heat by closely contacting the cemented carbide 140b to the silver lead 135. It is composed of bytes (140).

In addition, the cutting edge 141 of the cutting edge 141 of the diamond 140a portion of the diamond bite 140 bonded to the front seating groove 130a to minimize the stress concentrated at the vertex 143 of the diamond bite 140 ( 143) and the tip clearance angle 142 is given by the α angle so as to be symmetrical to the vertex 143 of the burnishing drill 140 on the side of the diamond bite 140 bonded to the rear seating groove 130b. A curved surface 144 is formed at the edge of the diamond bite 140 located at the outer circumference of the drill 100.

Further, the tip angle of the tip portion 100 in which the front seating grooves 130a are formed among the pair of tip portions 100 of the burnishing drill 100 is ground to 120 ° and the tip portion in which the rear seating grooves 130b are formed. The tip angle of 110 is polished to 118 °.

Furthermore, when the flux reacts with the dissolved metal and mixes salts that do not contain impurities from itself, and lowers the melting point by using a process to lower the melting point than the molten metal, the molten salt is lighter in weight than the liquid of the metal. Therefore, the dissolved salts float on the surface of the metal liquid and form a thin layer to cover it. The mixed salt used for this is called flux. In particular, chlorides, fluorides, resins, and the like are used as fluxes in order to prevent oxidation of the adhesive surface when the metal is joined by soldering, welding, or the like to complete the bonding.

Referring to the operation of the present invention as follows.

First, the tip angle of differently processing the outer surface of the front end portion 110 with respect to the center (S) of the pair of tip portion 110 formed to be partitioned with respect to the chisel 125 of the burnishing drill 100 different from each other. Machining step (S10), but the one end portion 110 of the pair of tip portion 110 is processed to 120 ° and the other end portion 110 in the opposite direction is processed to achieve a tip angle that is mutually asymmetric to 118 ° .

Subsequently, through the cylindrical grinding machine, the drill blade 110a is disposed on the tip end portion 110 of the burnishing drill 100 in a vertical downward direction from the discharge surface 124 for discharging the chip of the workpiece 10 to the outside of the hole 11. Forming the seating groove 130, but the front end portion 110 to form a 120 ° to form the front seating groove (130a) at the same angle as the angle of the drill blade (100a) and drill edge (110a) to the front end portion 110 to form a 118 ° Differently from the angle of the discharging surface 124 to the outer periphery of the drill blade (110a) to the outer periphery of the burnishing drill 100 after cutting at a different angle from the tip portion 110 to form a seating groove (130b) The angle of the 110 and the shape of the seating groove 130 is formed to be asymmetric with each other.

Next, the diamond bite machining is performed such that the diamond bite 140 of the same shape can be coupled to the pair of the front seating grooves 130a and the rear seating grooves 130b having mutually asymmetric processing angles of the burnishing drill 100. Go through the steps

Thereafter, the silver lead 135 is seated in each seating groove 130 through a position setting step, and then the processed diamond bite 140 overlaps with the silver lead 135.

The flux of the solvent function is applied to the surfaces of the silver lead 135 and the diamond bite 140, and then the heat is applied to the silver bite 135 to melt the diamond bite 140 to the seating groove 130 of the burnishing drill 100. Integrally bonded to the diamond bite 140 to the burnishing drill 100 and at the same time undergoes a welding step (S50) that can maximize the bonding and oxidation prevention by the flux.

Next, the angle and burnishing of the front end portion 110 of the burnishing drill 100 is fixed to the burnishing drill 100 integrally, and thus the edge surface of the diamond bite 140 that is processed and bonded to the mounting groove 130 is larger. Vertex stress of the diamond bite 140 and the burnishing drill 100 that first touches the surface of the workpiece 10 to be drilled through the grinding step to be matched with the outer diameter of the drill 100 and then drilled the hole 11. The burnishing drill 100 on the side of the diamond bite 140 bonded to the vertex 143 and the post seating groove 130b of the diamond bite 140 bonded to the front seating groove 130a to minimize the gap. ) The tip marginal angle 142 is given by the α angle so as to be symmetrical to the vertex 143, and the tip marginal angle 142 when the burnishing drill 100 descending while rotating for the hole processing first touches the surface of the workpiece 10. Burr for drilling holes 11 when cutting by Receiving a stress of the vertex 143 of washing the drill 100 without burden to regret prevented from the front end 110 of the high hardness of diamond tips 140 and the carbide material of the burnishing drill 100 is broken.

Then, the curved surface 144 so as to be symmetrically rounded to the outer peripheral edges of each diamond bite 140 to prevent brittleness of the diamond bite 140 bonded to the front and rear seating grooves 130a and 130b of the burnishing drill 100. Through the curved surface processing step (S80) to form a) to complete the production of the burnishing drill 100 having a diamond.

The vertex 143 of the diamond bite 140, which is stressed when the hole 11 is drilled by giving the tip clearance angle 142 and the curved surface 144 to the diamond bite 140 of the burnishing drill 100 as described above. Through the curved surface 144 of both corners is formed to receive the minimum stress to prevent brittleness of the diamond bite 140.

The burnishing drill 100 to which the diamond bite 140 is manufactured is attached to the workpiece 10 without abrasion even when the hole 10 is repeatedly worked on the workpiece 10 having high strength due to the high hardness of the diamond. Since the chip is not fused, it is possible to precisely and accurately process the precision and the surface of the inner diameter of the hole 11.

In addition, the diamond bite 140 of the burnishing drill 100 is drilled at the same time the drill bit without the diamond bite 140 is polished once more the inner diameter of the hole 11, the surface of the precision and the inner diameter Can be more precise.

In addition, the guide surface 122, which guarantees the uprightness of the burnishing drill 100, is rotated in close contact with the inner diameter of the hole 11 while being processed by preventing the shaking of the burnishing drill 100, that is, shattering vibration. The inner diameter of (11) is to be machined to be upright.

As described above, the method of manufacturing the burnishing drill with the diamond bite of the present invention and the burnishing drill simplifies the hole processing process without the need to replace the drill when precision drilling is performed by joining the diamond cutting blade to the burnishing drill. It is effective to increase the efficiency of the process.

In addition, the diamond bite with excellent hardness is bonded to the burnishing drill, but the stress concentrating on the vertex and edge of the diamond cutting edge when the hole is drilled by giving the tip clearance angle α angle and the curved edge to the corner of the cutting edge of the diamond cutting edge. This minimizes the embrittlement of the diamond, while ensuring the accuracy and surface diameter of the hole.

Furthermore, since the chips of the workpiece are not fused to the diamond cutting edge with high hardness and tip clearance angle, the precision of the hole machining can be further maximized.

In addition, through the burnishing drill equipped with a single diamond bite, the precision and surface finish of the hole is completed, and the number of drills applied for precision machining is integrated into one, which can reduce manufacturing cost and processing cost. It works.

Claims (4)

Two drill blades having a predetermined cutting edge at the center of the axial center end in a pair of distal ends 110 partitioned around the chisel in a cylindrical drill body 120 made of cemented carbide and connected to the shank 123 ( 110a is formed, the inclined surface 112 is formed on the rear side of the rotation direction from these drill blades 110a, and the guide surface 122 is extended in the axial direction from the edge of these inclined surface 112, These guide surfaces ( In the burnishing drill 100 is formed so that the discharge surface 124 for discharging the workpiece chip on the front side in the rotational direction of the 122 extending in the axial direction, Tip angle processing step (S10) for processing the outer shell of the surface of the tip portion 110 with respect to the center (S) of the pair of tip portion 110 of the burnishing drill 100 different from each other, The front seating groove at the same angle as the tip portion 110 at the lower side of the discharge surface 124 in the drill blade (110a) formed in any one tip portion 100 of the pair of tip portion 110 having different angles To form the rear seating groove (130b) at a different angle from the tip of the tip portion 110 on the discharge surface 124 on the other tip portion 100 drill blade (100a) to form a (130a) and the opposite side is small Seating surface processing step (S20), The diamond bite having the cemented carbide 140b and the diamond 140a integrally overlapped with the pair of the front seating grooves 130a and the rear seating grooves 130b which are mutually uneven angles of the burnishing drill 100 ( Diamond bite processing step (S30) for processing each of the 140 and the same shape as the seating groove 130, Positioning step (S40) for seating the silver lead 135 in the seating groove 130 and seated to overlap the diamond bite 140 on the upper surface; The welding step of applying the flux of the solvent function on the surface of the silver lead 135 and the diamond bite 140 and then applying heat to integrally bond the diamond bite 140 to the seating groove 130 of the burnishing drill 100 ( S50), The diamond bite 140 partially exposed to the outside of the front and rear seating grooves 130a and 130b is processed at the same angle and size as that of the tip 110 of the burnishing drill 100 and at the tip of the diamond bite 140. Cutting edge polishing step (S60) for processing the cutting edge portion 141, In order to minimize stress concentrated at the vertex 143 of the diamond bite 140, the diamond bite 140 is bonded to the vertex of the cutting edge part 141 and the rear seating groove 130b bonded to the front seating groove 130a. Tip margin angle processing step (S70) to give the tip margin angle 142 by α angle to be symmetrical to the vertex 143 of the burnishing drill 100 on the side of the diamond bite 140, and Curved surface 144 to be symmetrically rounded to the outer peripheral edge of each diamond bite 140 to prevent brittleness of the diamond bite 140 bonded to the front and rear seating grooves 130a and 130b of the burnishing drill 100 Method of producing a burnishing drill having a diamond bite, characterized in that consisting of a curved surface forming step (S80).  Two pairs of tip portions 110 partitioned about the chisel 125 in a cylindrical drill body 120 made of cemented carbide and connected to the shank 123 and having a predetermined cutting edge angle at the center of the center of the shaft center. The drill blades 110a are formed, and the inclined surfaces 112 are formed on the rear side in the rotational direction from these drill blades 110a, and the guide surfaces 122 extend in the axial direction from the edges of these inclined surfaces 112, In the burnishing drill 100 in which the discharge surface 124 for discharging the workpiece chip on the front side in the rotational direction of these guide surfaces 122 extends in the axial direction, The discharge surface 124 from the drill blade (110a) formed at the edge of the tip portion 110 of the large angle by grinding the tip angles located on one side of the chisel among the pair of tip portion 110 of the burnishing drill 100 differently Front seating groove (130a) and formed at the same angle as the front end portion 110 to the bottom, Incision at a different angle from the tip portion 110 to the outer periphery of the burnishing drill 100 on the discharge surface 124 on the other end portion 110 side opposite to the front seating groove 130a is formed. After seating grooves (130a), Silver lead 135 seated on the inner surface of the seating groove 130, The diamond 140a integrally overlapped with the cemented carbide 140b to be seated in the front seating groove 130a and the rear seating groove 130b formed at different angles on the tip portion 110 of the burnishing drill 100, respectively. After processing into the same shape as the seating groove 130 and then the cemented carbide (140b) in close contact with the silver lead 135 is provided with a diamond bite, characterized in that composed of a diamond bite 140 bonded to the burnishing drill 100 by heat One burnishing drill. The method of claim 2, Cutting edge portion 141 vertex 143 of the diamond 140a portion of the diamond bite 140 bonded to the front seating groove 130a to minimize the stress concentrated on the vertex 143 of the diamond bite 140 ) And the tip clearance angle 142 is given by the α angle so as to be symmetrical to the vertex 143 of the burnishing drill 140 on the side of the diamond bite 140 bonded to the back seating groove 130b. Burnishing drill having a diamond bite, characterized in that configured to form a curved surface 144 on the corner of the diamond bite 140 located on the outer periphery of (100).  The method of claim 2 or 3, The tip angle of the tip portion 100 in which the front seating grooves 130a are formed among the pair of tip portions 100 of the burnishing drill 100 is polished to 120 ° and the front seating portion 130b is formed. 110) The tip angle of the burnishing drill having a diamond bite, characterized in that configured to polish to 118 °.

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