KR101799358B1 - Cutting Tool For Manufacturing the Cutting Tool - Google Patents

Cutting Tool For Manufacturing the Cutting Tool Download PDF

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Publication number
KR101799358B1
KR101799358B1 KR1020150142222A KR20150142222A KR101799358B1 KR 101799358 B1 KR101799358 B1 KR 101799358B1 KR 1020150142222 A KR1020150142222 A KR 1020150142222A KR 20150142222 A KR20150142222 A KR 20150142222A KR 101799358 B1 KR101799358 B1 KR 101799358B1
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South Korea
Prior art keywords
abrasive grains
cutting tool
grooves
shank
cutting
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KR1020150142222A
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Korean (ko)
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KR20160043915A (en
Inventor
김수광
최종석
성경용
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이화다이아몬드공업 주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/22—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
    • B24D3/06—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements
    • B24D3/10—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements for porous or cellular structure, e.g. for use with diamonds as abrasives

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool used for cutting a stone or a concrete structure, and it is an object of the present invention to provide a cutting tool capable of maintaining the best cutting performance with an optimal amount of abrasive particles, .
According to one aspect of the present invention, there is provided a cutting tool produced by a fusing method, comprising a shank, abrasive grains, and a fusion agent for fixing abrasive grains on a shank by fusing, wherein the abrasive grains continuously protrude The shank is formed with grooves having a relatively shallow depth and grooves having a relatively deep depth or alternately irregularly formed on the upper surface of the shank, and the grooves are formed in a part of one abrasive grain Of the abrasive grains, and takes a shape that coalesces with a portion accommodated in one of the abrasive grains.
According to the present invention, it is possible to provide a cutting tool having an optimum amount of abrasive grains for maintaining the best cutting performance and at the same time having an improved life span.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool used for cutting a stone or a concrete structure, and more particularly to a cutting tool manufactured by a welding method.

A fused cutting tool manufactured by the fusion welding method is usually manufactured by applying abrasive particles and a fusion agent to a shank, or applying a fusion agent to a shank first, and then attaching the abrasive particles on the fusion agent .

A fused cutting tool is generally characterized in that when a single layer of abrasive grains, that is, abrasive grains exposed to the surface at the beginning, is dropped after completing the cutting operation, there is no abrasive grain to perform the work, . On the other hand, fusion cutting tools are used in various fields such as stone, construction, etc., because the manufacturing process is relatively simple and various shapes of tools are possible.

As shown in FIG. 1, in the method of manufacturing the cutting tool 10 by mixing the abrasive grains 12 and the fusion agent 13 and applying the resultant to the shank 11, It is difficult to control the position and phase of the abrasive grains.

The cutting tool thus manufactured exhibits a characteristic in which the abrasive particles and the adhesive agent are distributed unevenly. As a result, the cutting performance of the tool is deteriorated, and the life span is caused.

In addition, a method of manufacturing a cutting tool by applying a welding agent to a shank and attaching abrasive grains on a welding agent in the manufacturing method of the welding tool can adjust the arrangement position of the abrasive grains in the shank by a special method called a pattern have.

In the step of adhering the abrasive particles to the adhesive agent, the abrasive particles are placed on the fusion agent, and a part of the abrasive particles are inserted into the adhesive agent as necessary to fix the abrasive particles. However, there is a flow of the molten weld agent in the fusion heat treatment thereafter, and the abrasive grains are displaced toward the shank side due to the surface tension, so that they may deviate from their original positions. In addition, since the surface of most abrasive grains is brought into contact with the shank surface in accordance with the movement of the angled abrasive grains, the direction of the protruded abrasive grains is also made of the surface. A cutting tool having protruded surfaces of abrasive grains has a problem that cutting performance is poor due to the wide contact surface with the workpiece and polishing phenomenon occurs. In addition, if the load is kept high over a wide contact surface, abrasive particles and welding abrasive are abraded to shorten the service life.

A method of adjusting the thickness of the welding agent, a method of providing an inclination angle to the shank, and a method of placing a plurality of steps have been applied to increase the cutting ability.

However, in the method of controlling the thickness of the welding adhesive, cutting ability of the cutting tool can be improved due to a high protrusion height of the abrasive particles when the thickness of the welding adhesive is small, but the welding adhesive, which serves to fix the abrasive grains to the shank, There is a problem in that the particles can not work properly and fall off, shortening the service life due to abrasion of the cutting tool. On the other hand, when the thickness of the welding adhesive is too thick, the cutting height is lowered due to a low projection height

As described above, there is a problem that it is difficult to secure excellent cutting performance and long life at the same time by controlling the thickness of the adhesive.

In addition, the method of inclining the shank at the inclination angle and the method of putting the plural stages are helpful for the initial cutting performance, but it is not helpful to solve the problem that the abrasive grains protrude to the surface.

On the other hand, a method of adjusting the thickness of the welding agent, a method of applying an inclination angle to the shank, or a method of applying a plurality of steps to the abrasive grains and the welding agent are mixed and applied to the shanks, Or the like.

However, since the height of the abrasive grains is higher than that of the conventional method, the initial cutting performance is improved. However, since the abrasive grains can be easily removed from the abrasive grains, .

On the other hand, the fused cutting tool has a feature of being a single layer, and there is a tendency to manufacture by increasing the concentration of abrasive grains on the tool surface, since there is no need to wear the bonding agent holding the abrasive grains, that is, the bond. However, an excessively high concentration causes a deterioration in machinability, and since the gap between the abrasive grains is very narrow, the effect due to the projecting height becomes difficult to be exhibited.

One aspect of the present invention is to provide a cutting tool having an optimum amount of abrasive grains to maintain the best cutting performance through the positional arrangement and phase control of a proper abrasive grain, and at the same time, to provide a tool having an improved life.

Another aspect of the present invention is to provide a method of manufacturing a cutting tool having an optimum amount of abrasive grains to maintain the best cutting performance through the positioning and phase control of a proper abrasive grain and at the same time having an improved life.

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According to one aspect of the present invention, there is provided a cutting tool produced by a fusing method, comprising a shank, abrasive grains, and a fusion agent for fixing abrasive grains on a shank by fusing, wherein the abrasive grains continuously protrude The shank is formed with grooves having a relatively shallow depth and grooves having a relatively deep depth or alternately irregularly formed on the upper surface of the shank, and the grooves are formed in a part of one abrasive grain Of the abrasive grains, and takes a shape that coalesces with a portion accommodated in one of the abrasive grains.

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According to the present invention, it is possible to provide a cutting tool having an optimum amount of abrasive grains for maintaining the best cutting performance and at the same time having an improved life span.

1 is a schematic view showing an example of a cutting tool manufactured by a conventional welding method;
2 is a schematic view showing another example of a cutting tool manufactured by a conventional welding method;
Fig. 3 is a schematic view showing still another example of a cutting tool manufactured by a conventional fusing method
4 is a schematic view showing an example of a cutting tool manufactured by the welding method of the present invention
5 is a schematic view showing another example of a cutting tool manufactured by the welding method of the present invention
6 is a schematic view showing still another example of a cutting tool manufactured by the welding method of the present invention
7 is a schematic view showing a case where the cutting tool of the present invention is an example of a wire saw.
8 is a schematic view showing a case where the cutting tool of the present invention is another example of the wire saw.

The inventors of the present invention conducted research and experiment with interest in forming abrasive grains of a fused cutting tool into a plurality of layers as one of the measures to ensure excellent cutting performance and long life of the fused cutting tool.

2, the abrasive grains 22 and the adhesive agent 23 are mixed and applied to a shank 21 having a plurality of grooves 211 formed on the upper surface thereof to manufacture the cutting tool 20, 3, the abrasive grains 32 and the adhesive agent 33 are mixed with the shank 31 having a plurality of grooves 311 formed on the upper surface thereof and applied twice to form the cutting tool 30 As a result of investigation of the life and cutting performance after the preparation, it was confirmed that the lifetime is temporarily improved, but the cutting ability is reduced due to too much abrasive grains.

Moreover, it has been confirmed that the position and phase of the abrasive particles are difficult to control, and it is difficult to efficiently use all of the abrasive grains in each layer.

Particularly, the abrasive grains of a plurality of layers are more difficult to control the phase than when a single layer is provided, due to the characteristics of the abrasive particles moving toward the shank due to the surface tension during the fusing heat treatment.

Therefore, the present inventors have recognized through further research and experimentation that optimal positioning and phase control of abrasive particles are necessary in order to secure a good lifetime while preventing the cutting ability of the cutting tool from being reduced. To this end, It has been concluded that it is important to apply fusing heat treatment technique.

The present invention has been made based on the above-mentioned research and experimental results, and relates to a cutting tool including an optimal shank surface condition and an optimal fusion agent condition for optimal positioning and phase control of abrasive grains.

Further, the present invention relates to a method of manufacturing a cutting tool including an optimal position arrangement of abrasive grains and optimum shank surface conditions for phase control and optimal fusing heat treatment conditions.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

An example of the cutting tool of the present invention is shown in Fig.

As shown in Fig. 4, an example of the cutting tool of the present invention is a cutting tool 40 manufactured by a fusing method, wherein a shank 41, abrasive grains 42, and abrasive grains 42 are welded to a shank And a fixing agent 43 for fixation.

Grooves 411 are formed on the upper surface of the shank 41 and the abrasive grains 42 are arranged in two layers.

Figs. 7 and 8 show the case where the cutting tools 70 and 80 of the present invention are wire-stitched, and the abrasive grains 72 and 82 are arranged in two layers. 7 and 8, reference numerals 71 and 81 denote a shank, and reference numerals 73 and 83 denote an adhesive agent.

Another example of the cutting tool of the present invention is shown in Fig.

 As shown in Fig. 5, another example of the cutting tool of the present invention is a cutting tool 50 manufactured by a fusing method, wherein the shank 51, the abrasive grains 52, and the abrasive grains 52, A groove 511 is formed on the upper surface of the shank and at least 70% of the grooves 511 accommodate at least a portion of one abrasive grain 52 .

The abrasive grains 52 are arranged in three layers and are arranged so that the abrasive grains 52 continuously protrude when cutting the workpiece.

Another example of the cutting tool of the present invention is shown in Fig.

As shown in Fig. 6, another example of the cutting tool of the present invention is a cutting tool 60 manufactured by a fusing method, in which a shank 61, abrasive grains 62, and abrasive grains 62 A groove 611 having a relatively shallow depth and a groove 612 having a relatively deep depth are alternately formed on the upper surface of the shank 61. The grooves 611 having a depth of 70% The abrasive grains 62 are arranged in two layers and are arranged so that the abrasive grains 62 continuously protrude at the time of cutting the work material.

Although grooves having a relatively shallow depth and grooves having a relatively deep depth are alternately formed in Fig. 6, these grooves may be irregularly formed.

In the cutting tools of the present invention, the abrasive grains include diamond grains, CBN, SiC, and WC, and preferable abrasive grains are diamond grains.

The size of the abrasive grains may be selected according to the use of the cutting tool or the like, and is not particularly limited.

When the abrasive grains are diamond grains, the size thereof is preferably 50 to 1 mm.

Any material can be used as long as it can fix the abrasive grains to the shanks by fusing.

The fusing agent is preferably a Cu-Sn-Ti alloy, a Cu-Ag-Ti alloy or a Ni-Cr-B alloy, and TiC, Si, P, Fe and the like may be added depending on the application.

The shape, size and arrangement of the grooves formed on the upper surface of the shank and the intervals between the grooves are specified in consideration of the optimum positional arrangement of the abrasive grains and phase control.

The grooves may have, for example, a tapered shape, wherein the taper angle of the taper may be, for example, 1 to 3 degrees.

The grooves may be, for example, two to three stages.

The depth of the grooves is not particularly limited and is preferably 10 to 70% of the particle size of the abrasive grains, more preferably 20 to 50% of the abrasive grain size, , And the most preferable groove depth is 30 to 40% of the abrasive grain size.

The width of the grooves is not particularly limited as long as the width of the grooves can accommodate a part of the abrasive grains. The width of the grooves is preferably 20 to 120% of the abrasive grain size, more preferably 30 to 90% , And the most preferable groove width is 40 to 70% of the particle diameter of the abrasive grains.

The arrangement of the grooves is not particularly limited, but is preferably formed in a constant pattern.

The interval between the grooves is not particularly limited, but the interval between the centers of the grooves is preferably 150% or more of the abrasive grain size, and more preferably 200% or more of the abrasive grain size.

Hereinafter, a method of manufacturing a cutting tool of the present invention will be described.

An example of a method of manufacturing a cutting tool according to the present invention is a method of manufacturing a cutting tool having abrasive grains having two or more layers with respect to a top surface of a shank, comprising the steps of: preparing a shank having a plurality of grooves formed on its upper surface; Applying a sealant slurry to the upper surface of the shank; Arranging a part of the prepared abrasive particles in the grooves and arranging the remaining abrasive particles between the grooves and the grooves; And arranging the abrasive grains as described above, followed by fusing heat treatment at 800 to 1100 ° C for 5 to 60 minutes to fix the abrasive grains on the shanks by fusion of the fusion bonding agent, 4 is shown in Fig.

Another example of a manufacturing method of a cutting tool of the present invention is a method of manufacturing a cutting tool having three or less layers of abrasive grains based on a top surface of a shank, comprising the steps of preparing a shank having a plurality of grooves formed on its top surface ; Applying a sealant slurry to the upper surface of the shank; Arranging a part of the prepared abrasive particles in the grooves and arranging the remaining abrasive particles between the grooves and the grooves; Arranging abrasive grains as described above, secondarily applying the slurry to the top surface of the shank, and then arranging the abrasive grains in a second position corresponding to the grooves; And secondarily arranging the abrasive grains as described above, and fusing heat treatment at 800 to 1100 ° C for 5 to 60 minutes to fix the abrasive grains on the shanks by fusion of the fusion bonding agent, An example of a cutting tool is shown in Fig.

Another method of manufacturing a cutting tool of the present invention is a method of manufacturing a cutting tool having two or more layers of abrasive grains based on a top surface of a shank, wherein a groove having a relatively shallow depth and a groove having a deep depth are formed on the upper surface Preparing an alternate formed shank; Applying a sealant slurry to the upper surface of the shank; Arranging a part of the prepared abrasive grains in a shallow depth groove and arranging the remaining abrasive grains in a groove with a deep depth; And arranging the abrasive grains as described above, followed by fusing heat treatment at 800 to 1100 ° C for 5 to 60 minutes to fix the abrasive grains on the shanks by fusion of the fusion bonding agent, 6 is shown in Fig.

In the cutting tools of the present invention, the abrasive grains include diamond grains, CBN, SiC and WC, and preferable abrasive grains are diamond grains.

The size of the abrasive grains may be selected according to the use of the cutting tool or the like, and is not particularly limited.

When the abrasive grains are diamond grains, the size thereof is preferably 50 to 1 mm.

Any material can be used as long as it can fix the abrasive grains to the shanks by fusing.

The fusing agent is preferably a Cu-Sn-Ti alloy, a Cu-Ag-Ti alloy or a Ni-Cr-B alloy, and TiC, Si, P, Fe and the like may be added depending on the application.

The thickness of the slurry coating layer of the adhesive agent in the cutting tool is preferably limited to 0.5 to 1.5 times the particle diameter of the abrasive grains.

When the thickness of the slurry coating layer of the fusing agent is thin, the cutting ability of the cutting tool can be improved due to the high projecting height of the abrasive grains. However, since the fusing agent serving to fix the abrasive grains to the shanks is too small, There is a problem in that the life of the cutting tool is shortened due to abrasion of the cutting tool. On the other hand, when the thickness of the slurry coating layer of the welding agent is too thick, the cutting property is lowered due to the low projecting height, .

The shape, size and arrangement of the grooves formed on the upper surface of the shank and the intervals between the grooves are specified in consideration of the optimum positional arrangement of the abrasive grains and phase control.

The grooves may have, for example, a tapered shape, wherein the taper angle of the taper may be, for example, 1 to 3 degrees.

The grooves may be, for example, two to three stages.

The depth of the grooves is not particularly limited and is preferably 10 to 70% of the particle size of the abrasive grains, more preferably 20 to 50% of the abrasive grain size, , And the most preferable groove depth is 30 to 40% of the abrasive grain size.

The width of the grooves is not particularly limited as long as the width of the grooves can accommodate a part of the abrasive grains. The width of the grooves is preferably 20 to 120% of the abrasive grain size, more preferably 30 to 90% , And the most preferable groove width is 40 to 70% of the particle diameter of the abrasive grains.

The arrangement of the grooves is not particularly limited, but is preferably formed in a constant pattern.

The interval between the grooves is not particularly limited, but the interval between the centers of the grooves is preferably 150% or more of the abrasive grain size, and more preferably 200% or more of the abrasive grain size.

The heat treatment conditions are selected to ensure optimal positioning and phase control of the abrasive particles.

When the fused material is melted at the heat treatment temperature, the abrasive grains are moved in the shank direction by the surface tension, and at the same time, the grains move due to the flow of the melted fusing agent acting on the fusing agent. Therefore, in order to control the position of the abrasive grains, it is necessary to set the condition that most of the abrasive grains are moved in the direction in which the surface tension acts by appropriately adjusting the fusing heat treatment temperature and time.

When the fusing heat treatment is performed under the above conditions, the abrasive grains are firmly fixed at a desired position when the fused slurry is fused.

If the heat treatment is not performed at an appropriate heat treatment temperature and time, the molten weld material moves due to gravity, which causes movement of the abrasive grains, and the abrasive grains can not be fixed at a desired position.

When the fusion heat treatment temperature is too low, there is a problem that the fusion agent is not melted properly and the abrasive particles can not be fixed. When the fusion heat treatment temperature is too high, the fluidity becomes too large and the fusion agent flows down. Therefore, the fusing heat treatment temperature is preferably 800 to 1100 ° C, more preferably 800 to 950 ° C, and most preferably 850 to 900 ° C.

If the fusing heat treatment time is too long, there is a problem that the fusing agent flows down. When the fusing heat treatment time is too short, the fusing agent can not fix the abrasive particles.

Therefore, the fusing heat treatment time is preferably 5 to 60 minutes, more preferably 7 to 40 minutes, and most preferably 10 to 30 minutes.

Hereinafter, the present invention will be described in more detail by way of examples.

(Example 1)

After a slurry of a Cu-Sn-Ti-based adhesive material was applied to the top surface of a shank having a plurality of grooves formed on its upper surface, diamond particles having a size of 0.5 mm were arranged between grooves and grooves and grooves, And the abrasive grains were fixed on the shanks by fusion bonding of the fusion bonding agent to produce a cutting tool (wire saw) having two diamond grains (abrasive grain) layers as shown in Fig.

In Table 1, the conventional tool was manufactured under the same conditions as the above-mentioned cutting tool, except that a shank without grooves was used on the top surface.

The depth of the groove formed on the upper surface of the shank was 50% of the diamond particle size (particle diameter), and the width of the groove was 80% of the diamond particle size (particle diameter).

The coating thickness of the Cu-Sn-Ti-based adhesive slurry was 1.1 times as large as the diamond particle size.

The fraction (%) in which the diamond particles are located in the grooves in the cutting tool manufactured as described above was as shown in Table 1 below.

For the cutting tool manufactured as described above, a concrete containing 2% reinforcing steel was prepared for cutting performance test, and the results are shown in Table 2 below.

At this time, cutting test was conducted using 20HP construction wire saw equipment, and the wire was rotated at a peripheral speed of 22 m / s to cut the 2% reinforced concrete as a work piece.

In the performance evaluation, the cutting time and the final cut number were used to confirm the machinability and lifetime.

Pseudo-No. Fusing heat treatment temperature (캜) Fusing heat treatment time (min) Percentage of diamond particles in the groove (%) Conventional tool 850 30 0 Invention Tool 1 900 20 90 Invention Tool 2 850 25 75 Invention Tool 3 950 15 85 Comparison Tool 1 1150 10 65

division Machinability (%) life span (%) Conventional tool 100 100 Invention Tool 1 152 134 Invention Tool 2 132 121 Invention Tool 3 115 112 Comparison Tool 1 108 110

As shown in Table 2, the inventive tool 1-3 according to the present invention shows a significantly increased machinability and lifetime than the conventional tool.

The comparative tool 1 manufactured under the conditions outside the manufacturing conditions of the present invention has increased machinability and service life as compared with the conventional tool, but does not reach the inventive tool 1-3.

(Example 2)

After a slurry of a Cu-Sn-Ti-based fusion-bonding agent was applied to the upper surface of a shank having a plurality of grooves formed on its upper surface, diamond particles having a size of 0.6 mm were arranged between grooves and grooves and grooves, And the abrasive grains were fixed on the shank by fusion bonding of the fusion bonding agent to produce a cutting tool (wire saw) having three diamond grains (abrasive grain) layers as shown in Fig.

In Table 3, the conventional tool was manufactured under the same conditions as the above-mentioned cutting tool, except that a shank without grooves was used on the top surface.

The depth of the groove formed on the upper surface of the shank was 40% of the diamond particle size (particle diameter), and the width of the groove was 70% of the diamond particle size (particle diameter).

The coating thickness of the Cu-Sn-Ti-based adhesive slurry was 1.1 times as large as the diamond particle size.

The percentage (%) in which the diamond particles are located in the grooves in the cutting tool manufactured as described above was as shown in Table 3 below.

For the cutting tool manufactured as described above, a concrete containing 2% reinforcing steel was prepared for cutting performance comparison, and the results are shown in Table 4 below.

At this time, the cutting test was conducted using 20HP construction wire saw equipment, and the wire was rotated at a peripheral speed of 22m / s to cut the 2% reinforced concrete as a work piece.

In the performance evaluation, the cutting time and the final cut number were used to confirm the machinability and lifetime.

Pseudo-No. Fusing heat treatment temperature (캜) Fusing heat treatment time (min) Percentage of diamond particles in the groove (%) Conventional tool 850 30 0 Invention Tool 4 900 15 85 Invention Tool 5 880 20 70 Invention tool 6 920 10 80 Comparison Tool 2 1150 10 65

division Machinability (%) life span (%) Conventional tool 100 100 Invention Tool 4 162 151 Invention Tool 5 128 136 Invention tool 6 116 127 Comparison Tool 2 108 110

As shown in Table 4, it can be seen that the cutting tool (4-6) manufactured according to the present invention has a significantly improved machinability and service life than the conventional tool.

In particular, in the case of Inventive Tool 4, the cutting performance was improved by about 62% due to the protrusion of high abrasive grains, and other tools also increased by 16 to 28%. Further, the lifetime of the inventive tool 4 was improved by about 51% as compared with the conventional tool due to the additional lamination of abrasive grains, and a better result was obtained compared with the inventive tools 1 to 3.

The comparative tool 2 manufactured under the conditions outside the manufacturing conditions of the present invention has increased machinability and service life as compared with the conventional tool, but it does not extend to the inventive tool 4-6.

(Example 3)

After a slurry of a Cu-Sn-Ti-based adhesive was applied to the upper surface of the shank having a plurality of grooves formed on the upper surface thereof, diamond particles having a size of 0.5 mm were arranged between the grooves and the grooves and the grooves, And the abrasive grains were fixed on the shanks by fusion bonding of the fusion bonding agent to produce a cutting tool (wire saw) having three diamond grains (abrasive grain) layers as shown in Fig.

In Table 5 below, the conventional tool was manufactured under the same conditions as the above-mentioned cutting tool except that a shank without grooves was used on the top surface.

The grooves formed on the upper surface of the shank are alternately formed of shallow grooves and deep grooves.

The depth of the deep groove among the grooves is 70% of the diamond particle size (particle diameter), the width of the groove is 100% of the diamond particle size (particle diameter), the depth of the shallow groove is 40% The groove width was 70% of the diamond particle size (particle size).

The coating thickness of the Cu-Sn-Ti-based adhesive slurry was 1.1 times as large as the diamond particle size.

The fraction (%) in which the diamond particles are located in the grooves in the cutting tool manufactured as described above was as shown in Table 5 below.

For the cutting tool manufactured as described above, a concrete containing 2% reinforcing steel was prepared for cutting performance test, and the results are shown in Table 6 below.

At this time, the cutting test was conducted using 20HP construction wire saw equipment, and the wire was rotated at a peripheral speed of 22m / s to cut the 2% reinforced concrete as a work piece.

In the performance evaluation, the cutting time and the final cut number were used to confirm the machinability and lifetime.

Pseudo-No. Fusing heat treatment temperature (캜) Fusing heat treatment time (min) Percentage of diamond particles in the groove (%) Conventional tool 850 30 0 Invention Tool 7 875 20 90 Invention Tool 8 850 15 75 Invention Tool 9 925 10 85 Comparison Tool 3 1150 10 65

division Machinability (%) life span (%) Conventional tool 100 100 Invention Tool 7 142 126 Invention Tool 8 118 120 Invention Tool 9 113 115 Comparison Tool 3 108 110

As shown in Table 6, it can be seen that the cutting tool and the tool life of the inventive tool (7-9) according to the present invention are significantly increased as compared with the conventional tool.

The comparative tool 3 manufactured under the conditions outside the manufacturing conditions of the present invention has increased machinability and service life as compared with the conventional tool, but it does not reach the inventive tool 7-9.

10, 20, 30, 40, 50, 60, 70, 80. . . Cutting tool
11, 21, 31, 41, 51, 61, 71, 81. . . Shank
12, 22, 32, 42, 52, 62, 72, 82. . . Abrasive particle
13, 23, 33, 43, 53, 63, 73, 83. . . Fusion agent
611. . , A shallow depth groove
612. . . A deep groove

Claims (24)

delete delete A cutting tool produced by a welding method,
A shank, abrasive particles, and a fusion agent for fixing the abrasive grains on the shank by fusing,
The abrasive grains are arranged in two or more layers above the upper surface of the shank so as to continuously protrude when cutting the work material,
Wherein the shank has grooves with a relatively shallow depth and grooves with a deep depth alternately or irregularly formed on an upper surface thereof, the grooves receiving a portion of one of the abrasive grains, Of the cutting tool. 4. The cutting tool according to claim 3, wherein the abrasive grains are one selected from the group of abrasive grains consisting of diamond grains, CBN, SiC and WC. 4. The cutting tool according to claim 3, wherein the abrasive grains are diamond grains having a size of 50 to 1 mm. 4. The cutting tool according to claim 3, wherein the fusing agent is one selected from the group consisting of a Cu-Sn-Ti alloy, a Cu-Ag-Ti alloy and a Ni-Cr-B alloy. 4. The cutting tool according to claim 3, wherein the groove has a tapered shape, and the taper angle of the taper is 1 to 3 degrees. 4. The cutting tool according to claim 3, wherein the groove is formed in two to three stages. 4. The cutting tool according to claim 3, wherein the depth of the groove is 10 to 70% of the grain size of the abrasive grains. The cutting tool according to claim 3, wherein the width of the groove is 20 to 120% of the grain size of the abrasive grains. 4. The cutting tool according to claim 3, wherein the interval between the centers of the grooves is 150% or more of the grain size of the abrasive grains.
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