KR100910592B1 - Processing tip and tools using the same - Google Patents

Abstract

The present invention relates to a machining tip having a engaging protrusion protruding in a joining direction of a shank, a tool equipped with the same, and a manufacturing method thereof. The present invention relates to a wheel for cutting stones filled with a filler and a manufacturing process thereof. will be. One side of the present invention is a tip bonded to the shank of the machining tool, the tip body is mixed with a sintered material for strengthening the hardness to the metal material sintered tip body; And a metal material and an abrasive material, and comprising at least one engagement protrusion sintered integrally with the tip body and protruding in the direction in which the shank is joined.

Stone, cutting, cutting, wheel, tips, polishing

Description

Processing tip and tools using the same

1A and 1B are perspective views of a tool showing a conventional machining tip.

2 is a front view of a machining tip according to a first embodiment of the present invention.

3a and 3b is an operation view showing a state of polishing the workpiece by attaching the tip according to the first embodiment to the saw-type processing tool and the drill-type processing tool

4 is a front view of a machining tip according to a second embodiment of the present invention.

5 is a front view of a machining tip according to a third embodiment of the present invention.

6 is a front view of a machining tip according to a fourth embodiment of the present invention.

7 is a front view of a machining tip according to a fifth embodiment of the present invention.

8 is a front view of a machining tip according to a sixth embodiment of the present invention.

9 is a front view of a machining tip according to a seventh embodiment of the present invention.

10 is a front view of a machining tip according to an eighth embodiment of the present invention.

11 is a front view of a machining tip according to a ninth embodiment of the present invention.

12 is a front view of a machining tip according to a tenth embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

100: processing tip 110: tip body

120: engaging protrusion 130: cemented carbide member

200: shank

115-6, 115-7, 115-8, 115-9, 115-10: Incision groove

117-9, 117-10: Filler 118-10: Hole

The present invention relates to a machining tip, a machining tool, and a method for manufacturing the same, and more particularly, to a machining tip, a tool equipped with the same, and a method of manufacturing the same, wherein the engaging protrusion protrudes in a joining direction of the shank.

Diamond has the highest hardness and has been developed for various purposes since it was artificially synthesized in the 1950s, and has been applied to cutting tools for cutting various materials as important applications.

In particular, diamond exhibits excellent cutting power even in the case of relatively hard inorganic materials, and is widely used, for example, when cutting materials such as granite, marble, brick, refractory brick, concrete, asphalt and glass.

In general, a tool employing diamond is formed on the shank circumference including diamond particles. The method of forming the tip on the shank includes welding, fusion, electrodeposition, and simultaneous heating. have.

Welding method is a method of mixing, forming, and sintering diamond and super abrasive materials to produce shank (high frequency welding), laser welding, oxygen torch welding, etc., and electrodeposition method is applied to electroplating using nickel, and the shank ( Shank) is a method of electrodepositing abrasive grains by machining.

In addition, the fusion method is a method in which diamond particles are mixed with a metal powder and an organic binder to form a fluid paste, and then sprayed onto a shank and directly bonded to a shank processed into a shape required at a high temperature. Simultaneous heating is a super abrasive material such as diamond. Is mixed with a metal binder and molded together with a shank and then sintered simultaneously in a frequency furnace or an electro furnace.

However, other methods except the welding method have problems that cannot be applied to a large tool despite the advantages of complicated and various polishing and the like, and more than 80% of the current tip is formed by the welding method.

1A shows a perspective view of a polishing tip used in a saw cutting tool formed by conventional welding methods. According to this, a plurality of working tips 20 including diamond particles are joined along the circumference of the body (shank 10), and the working tips 20 joined to the circumference according to the rotation of the body 10 are used for cutting the workpiece. Configured to cut. The body is manufactured in various sizes from 4 inches to 120 inches, and the processing tip 20 may have a straight or curved shape according to the size of the body. (In FIG. 1, a straight line ("A") and a curved shape ( An enlarged view of the machining tip of "B") is shown). On the other hand, in order to reduce the cost, the bottom portion of the processing tip 20 in contact with the body may be formed with a joint 20a that does not include diamond (abrasive material).

1B is a perspective view of a polishing tip for use in a drill-type cutting tool formed by a conventional welding method, whereby a plurality of machining tips 40 are joined along a circumference of a cylindrical body 30, and a cylindrical tube As the 30 is rotated, the machining tip 40 is configured to drill the workpiece. Body 30 is produced in a variety of sizes, the processing tip 20 may have a straight or curved shape depending on the size of the body (Fig. 1b curved ("A") and straight ("B"). Is an enlarged view of the machining tip 40). Unexplained reference numeral 40a is a junction.

However, in the case of the machining tip by the welding method, first, in the case of machining the workpiece, the shear stress received by the tip is concentrated on one extension line, that is, the joining line of the shank and the tip, from the grinding direction and the reverse direction and the side of the shank. The instantaneous mechanical and physical shocks do not receive, there is a problem that the tip is dropped.

Secondly, if the grinding is progressed to some extent during the processing of the workpiece, the shank is inserted into the workpiece and the side is in contact with the workpiece. In this case, the hardness of the shank is weak and wear occurs.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a polishing tip, a polishing tool and a method of manufacturing the same to prevent dropping of the processing tip and side wear of the shank.

Another object of the present invention is to provide a polishing tip, a polishing tool, and a method of manufacturing the same, which reduce cutting noise.

One side of the present invention is a tip bonded to the shank of the machining tool, the tip body is mixed with a sintered material for strengthening the hardness to the metal material sintered tip body; And a metal material and an abrasive material, and comprising at least one engagement protrusion sintered integrally with the tip body and protruding in the direction in which the shank is joined.

 Another aspect of the present invention is a stone processing tool comprising a shank and a tip joined to the shank, the groove is formed on the surface is joined to the tip of the shank, the tip is reinforced with hardness to the metal material A tip body sintered by mixing the abrasive for making; And a metal material and an abrasive material, and comprising at least one engagement protrusion sintered integrally with the tip body and protruding in the direction in which the shank is joined.

Another aspect of the present invention is a manufacturing method of a machining tool comprising a shank and a tip joined to the shank, the method comprising: a tip body including an abrasive for strengthening hardness in a metal material; And a tip which is connected to the tip body and protrudes in the direction in which the shank is joined, and which comprises at least one engagement protrusion including an abrasive material in the metal material by welding to the shank.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 2A is a perspective view of a machining tip according to a first embodiment of the present invention, respectively. According to this, the stone processing tip comprises a tip body and the engaging projection.

Team body 110 is in contact with the workpiece, the portion to polish the workpiece is configured to include a metal material and the abrasive for strengthening the hardness. In this case, the metal material may be composed of cobalt (Co), copper (Cu), tin (Sn), iron (Fe), zinc (Zn), nickel (Ni), or a mixture of at least one thereof.

In addition, the abrasive may be composed of diamond, silicon carbide (SiC), alumina (Al 2 O 3), and cubic boron nitride (CBN) or at least one mixture thereof.

The engaging protrusion 120 is connected to the tip body 110, and is a part protruding in the direction in which the shank is joined, and by forming the engaging protrusion 120, the joining position in the shank can be easily set. The body 110 does not escape from the shank.

The material of the engaging protrusion 120 includes the same metal material and abrasive as in the above-described team body 110. In particular, the engagement protrusion 120 should contain an abrasive material, which is necessary, when the tip body 110 is inserted into the workpiece, when the tip body 110 is inclined due to a poor polishing, the shank side is in direct contact with the workpiece. Is to solve the problem of wear.

That is, the hardness of the engagement protrusion 120 including the abrasive is fitted into the fitting groove of the shank, the contact protrusion 120 formed on the shank side, even if the shank is rotated inside the workpiece to be in contact with the workpiece The workpiece can be polished smoothly without being damaged.

The engaging protrusion 120 may be made of the same material or different materials as those of the tip body 110, and the composition ratio of the material may be different from each other, and at least one or more may be provided. It may be manufactured in various shapes and will be described in the following embodiments.

3A and 3B are operation diagrams showing a state in which a tip according to the first embodiment is attached to a saw-type machining tool and a drill-type machining tool to polish a workpiece;

According to Figure 3a, the engaging groove is provided in the circumference of the disk-shaped shank 130, the tip 100 is provided with the engaging projection 120 in the engaging groove. When the polishing progresses to a certain degree, the tip 100 enters into the workpiece, and thus the side surface of the shank (disc; 200) comes into contact with the workpiece 300, and the shank 200 is worn or deteriorated. However, the engagement protrusion 120 including the abrasive is formed on the side surface of the shank 200 in contact with the workpiece 300 to prevent the abrasion of the shank 200 and to provide a cutting function to assist the tip body 200. can do.

According to FIG. 3B, a fitting groove is provided around the tubular shank 130 ′, and a tip 110 ′ having a fitting protrusion 120 ′ is mounted on the fitting groove. Similarly, when polishing progresses to a certain degree, the tip 100 'enters into the workpiece, and the side surface of the tube 200' comes into contact with the workpiece 300 '. Accordingly, the side surface of the tube 200 'is in contact with the workpiece 300' and the shank 200 'is worn or deteriorated. However, the engagement protrusion 120 'including the abrasive is formed on the side surface of the shank 200 in contact with the workpiece 300', thereby preventing wear of the shank 200 'and assisting the tip body 200'. It can be a cutting function.

Those skilled in the art will readily understand that the polishing tip according to the present invention can be applied to all of a disk, plate, and tubular shank, and thus, the description of the following embodiments will be made by using a disk-shaped shank on the ground.

4 is a front view showing a second embodiment according to the present invention bonded to a shank. According to this, the second embodiment has the same configuration as the first embodiment, but the cemented carbide member 130 is further provided at the portion where the front end portion and the shank of the tip are first contacted with the workpiece during polishing. Since the cemented carbide member 130 is further provided, a portion where the front end of the weak tip and the shank are coupled is reinforced.

5 is a front view showing a third embodiment according to the present invention bonded to a shank. Accordingly, in the third embodiment, unlike the second embodiment, the engagement protrusion 120-3 is not formed at the center portion of the tip body 110-3, but is formed at the front end portion in the rotational direction. As such, when the engaging protrusion 120-3 including the abrasive is formed at the front end in the rotational direction, it is possible to protect the weak part where the tip and the shank are coupled, so that a separate cemented carbide member may not be provided as in the second embodiment. It has the advantage of being.

6 is a front view showing a fourth embodiment according to the present invention bonded to a shank. According to this, the fourth embodiment is configured differently from the first embodiment in terms of the material and shape of the engaging projection 120-4. That is, the shape of the engaging projection (120-4) is made of a circular shape. However, the circular shape is only one example, and the protrusions may be formed in various forms such as triangles. In addition, the material was also configured differently from the tip body (120-3). At this time, to configure the material differently, but includes both the metal material and the abrasive, it means that the specific type or composition of the specific material is configured differently. For example, the engagement protrusion may have a smaller or larger amount of abrasive than the tip body. In addition, the thickness of the engaging protrusion may be the same as the tip body, or may not be the same as the thickness of the tip body.

By the present embodiment, those skilled in the art will recognize that in the present invention, the shape and material of the engaging projection are not limited.

 7 is a front view showing a fifth embodiment according to the present invention bonded to a shank. According to this, the fifth embodiment includes two engagement protrusions 120-5a and 120-5b. By the present embodiment, those skilled in the art will recognize that the number of the engaging projections in the present invention is one or more, and the number is not limited.

8 is a front view showing a sixth embodiment according to the present invention bonded to a shank. In the present embodiment, the tip body 110-6 is cut in a part of the tip body 110-6 in a direction different from the polishing direction of the tip, thereby cutting the tip body 110-6. ) Is further formed, the tip body (110-6) is divided into two parts. The cutouts 115-6 are formed to facilitate circulation of the coolant during polishing and to facilitate the removal of chips of the cut stone.

9 is a front view showing a seventh embodiment according to the present invention bonded to a shank. In the present embodiment, the tip body 110-7 is cut in a part of the tip body 110-7 in a direction different from the polishing direction of the tip, and thus a cutting groove 115-7a for partitioning the team body 110-7. , 115-7b) are formed, and the tip body 110-7 is divided into three parts. At this time, the cutting grooves 115-7a and 115-7b and the engagement protrusions 120-7 may not be in positions facing each other. Through this embodiment, those skilled in the art will understand that the present invention is not limited to the number of incision grooves, and that the engaging protrusion and the incision groove do not have to be in positions opposite to each other.

10 is a front view showing an eighth embodiment according to the present invention bonded to a shank. In the present embodiment, the cutouts 115-8a, 115-8b, and 115-8c are formed in both the surface attached to the shank and the surface in contact with the workpiece. Incision grooves (115-8a, 115-8b, 115-8c) is also formed on the surface that is attached to the shank, even if the tip is used for a certain period of time there is an effect that the incision groove in the tip does not disappear continuously. Through this embodiment, those skilled in the art will understand that the present invention is not limited to the location of the incision.

11 is a front view showing a ninth embodiment according to the present invention bonded to a shank. In the present embodiment, the filler 117-9 filling the cutting grooves 110-9 is further included in the above-described embodiments. The filler 117-9 is filled with a material having a lower hardness than the tip body 110-9 for smooth cutting of the workpiece. At this time, it is preferable to use a colored metal material having a color so that the filler is distinguished from the tip body. As the metal material for this, it is preferable to include copper (Cu) or tin (Sn).

By filling the filler 117-9, the cutting speed can be increased, and cutting noise can be reduced. In addition, the filler 117-9 buffers to prevent the tip from breaking during operation.

12 is a front view showing a tenth embodiment according to the present invention bonded to a shank. In the present embodiment, at least one hole 118-10 is further formed in the ninth embodiment with a predetermined depth in the processing surface where the tip is in contact with the workpiece. The hole is a sandwich effect naturally as the hole wears the segment, and the mesh is formed on the surface to participate in improving machinability.

On the other hand, the body of the cutting tool to which the above-described processing tips are attached may be in various forms, for example disks, tubes, etc., the body will be provided with a power transmission means such as a rotating shaft. In addition, the periphery of the body is provided with a slot, the tip is bonded to the body bordering each slot.

The machining tip according to the invention is not limited to the shape of the body, and examples of such cutting tools are saw blades, gang saws, chain saws, frame saws as described above. saw core drill, grinding cup wheel, polishing disc, and the like, and those skilled in the art can use these tools with high frequency welding, laser welding, oxygen It may be easily attached using torch welding.

Hereinafter, an embodiment of a manufacturing method for forming a cutting tip according to the present invention and bonding to a shank will be briefly described.

The processing tip and the manufacturing method for joining it to the shank are largely comprised of seven steps of mixing-forming-setting-sintering-cooling-separation-welding.

In the mixing step is a step of mixing the materials of the tip body, the engaging projection, the filler. That is, the metal powder (metal powder) and the abrasive material of the tip body are mixed, the metal powder and the abrasive material of the ridges are mixed, and the metal powder, which is a component of the filler, is mixed.

In the forming step, each mixed mixture is put into a mold to form a shape, thereby manufacturing segments of the respective tip bodies, the engaging protrusions, and the filler material.

The setting step is to insert and position the segments of the tip body, the engaging protrusion, and the filler material in the carbon mold, respectively.

The sintering step is a step of charging the carbon mold (Carbon mold) set in the furnace, and sintering by putting pressure, temperature, N2 gas. At this time, the sintering temperature is 700 ℃ ~ 800 ℃, the pressure is 200Kg / ㎠ ~ 300Kg / ㎠, N2 gas is put into 30Nm3 / Hr, the time can be 1 Hr.

In the cooling step, the carbon mold is charged into the cooling press. At this time, the pressure is 300Kg / cm 2 to 350Kg / cm 2, and the N 2 gas is 30Nm 3 / Hr, and the time can be 1 Hr.

Separation step 45 is a step of separating the segment from the carbon mold.

Finally, the welding step 46 is a step of welding the completed segment 32 to the shank. Welding may be performed by high frequency welding, laser welding or oxygen torch welding.

Although the present invention has been described primarily with reference to the above embodiments, many other possible modifications and variations can be made without departing from the spirit and scope of the invention. For example, a change in the specific shape of the processing tip, a change in the position of formation of the cutout, a change in the number of the cutouts, a change in the position and the number of the ridges, etc. will belong to the deformation that can be easily modified by those skilled in the art. In addition, although not described in detail, the combination of the embodiments presented herein will be an easy variation for those skilled in the art.

The processing tip and the processing tool according to the present invention have an engagement protrusion, thereby dispersing the shear stress concentrated on the conventional welding surface to prevent the segment from falling off and preventing the shank side from being deteriorated and worn.

In addition, by providing a cemented carbide member further has the effect of reducing the wear of the tip, it is possible to increase the cutting speed and reduce the cutting noise by forming the incision groove, and to reduce the cutting speed and cutting noise by filling the filler with the filler Of course, there is a buffering effect to prevent the tip from breaking during operation.

The scope of the above-described invention is defined in the following claims, and is not bound by the description in the text of the specification, all modifications and variations belonging to the equivalent scope of the claims will fall within the scope of the present invention.

Claims (22)

In the tip joined to the shank of the machining tool, the tip, A tip body sintered by mixing abrasives to enhance hardness with a metal material; And Comprising a metal material and an abrasive, and sintered integrally with the tip body, and comprises at least one engaging protrusion protruding in the direction in which the shank is bonded, The tip body is formed by cutting a portion of the tip body in a direction different from the polishing direction of the tip, at least one incision groove for partitioning a portion of the team body is formed, The cutting groove is formed by including a filler of a material having a lower hardness than the tip body. The method of claim 1, The material of the engaging projection and the material of the tip body is the same, characterized in that the processing tip. The method of claim 2, A tip for processing, characterized in that the composition ratio of the material of the engaging protrusion and the material of the tip body is configured differently. The method of claim 1, The abrasive included in the tip body and the engaging projection is characterized in that it is composed of one or more mixtures selected from the group consisting of diamond, silicon carbide (SiC), alumina (Al2O3), and CBN (Cubic boron nitride) Machining Tips. The method of claim 1, The metal material included in the tip body and the engaging protrusion is one selected from the group consisting of cobalt (Co), copper (Cu), tin (Sn), iron (Fe), zinc (Zn), and nickel (Ni) or A processing tip, characterized in that it consists of one or more mixtures. The method of claim 1, The engaging projection is characterized in that the tip is formed in the center of the tip body. The method of claim 1, The engaging protrusion is formed in the front end portion in contact with the workpiece first according to the polishing direction of the tip body. delete The method of claim 1, The cutting groove is a processing tip, characterized in that the tip body is formed on the surface in contact with the workpiece. The method of claim 1, The cutting groove is a processing tip, characterized in that the tip body is formed on the surface in contact with the workpiece and the surface in contact with the shank. delete The method of claim 1, The filler tip for processing, characterized in that it comprises a colored metal. The method of claim 12, The colored metal is a processing tip, characterized in that it comprises copper (Cu) or tin (Sn). The method of claim 1, At least one hole directed toward the inside of the tip body is in contact with the workpiece further comprises a processing tip. In the stone processing tool comprising a shank and a tip joined to the shank, A joining groove is formed on a surface where the shank is joined to the tip, The tip is A tip body sintered by mixing abrasives to enhance hardness with a metal material; And Comprising a metal material and an abrasive, and sintered integrally with the tip body, and comprises at least one engaging protrusion protruding in the direction in which the shank is bonded, The tip body is formed by cutting a portion of the tip body in a direction different from the polishing direction of the tip, at least one incision groove for partitioning a portion of the team body is formed, The cutting groove is a processing tool, characterized in that it comprises a filler of a material having a lower hardness than the tip body. The method of claim 15, The shank is in the form of a disk or a plate, and a machining tool, characterized in that provided with a slot around the disk or plate. The method of claim 16, Bonding surface that the tip and the shank contact is a machining tool, characterized in that further provided with a cemented carbide member for preventing wear. The method of claim 17, The cemented carbide member is a machining tool, characterized in that provided in the position that first touches the workpiece in accordance with the rotation of the shank. The method of claim 15, The shank is a tube to which the rotating shaft is coupled, and has a slot along the circumference of the tube. The method of claim 15, The machining tool is a saw blade, gang saw, chain saw, frame saw, core drill, grinding cup wheel, polishing disc (polishing disc) is a machining tool, characterized in that one selected from the group consisting of. In the manufacturing method of the machining tool comprising a shank and a tip joined to the shank, A tip body including an abrasive for strengthening the hardness of the metal material; And at least one engagement protrusion connected to the tip body and protruding in the direction in which the shank is joined, the abrasive including a metal material. The tip body is formed by cutting a portion of the tip body in a direction different from the polishing direction of the tip, at least one cut groove is formed to partition a portion of the tip body, The cutting groove is a manufacturing method for a tool for joining the tip comprising a filler of a material having a lower hardness than the tip body to the shank by welding. The method of claim 21, The welding method is a method for manufacturing a tool for processing, characterized in that one method selected from the group consisting of high frequency welding, laser welding, oxygen torch welding.

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