CA3202412A1 - Cutting tool with through coolant - Google Patents
Cutting tool with through coolant Download PDFInfo
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- CA3202412A1 CA3202412A1 CA3202412A CA3202412A CA3202412A1 CA 3202412 A1 CA3202412 A1 CA 3202412A1 CA 3202412 A CA3202412 A CA 3202412A CA 3202412 A CA3202412 A CA 3202412A CA 3202412 A1 CA3202412 A1 CA 3202412A1
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- coolant
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- shank
- tool
- cutting portion
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- 238000005520 cutting process Methods 0.000 title claims abstract description 158
- 239000002826 coolant Substances 0.000 title claims abstract description 77
- 230000002093 peripheral effect Effects 0.000 claims abstract description 13
- 238000003801 milling Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
A cutting tool (10) with through coolant has an elongated shank (11) and a cutting portion (12). An outer peripheral surface of the shank (11) is surrounded and tightly held by a hole-wall defined by a tool-fixing hole (921) of a machine tool (92). At least one coolant-guiding recess (111) is formed in the outer peripheral surface of the shank (11) and extends lengthwise along the shank (11). A cross-sectional area of each coolant-guiding recess (111) gradually reduces from a shank-inner end (114) of the shank (11) toward the cutting portion (12). Each coolant-guiding recess (111) forms a coolant channel (112) together with the hole-wall of the tool-fixing hole (921). The coolant channel (112) enables coolant from a coolant-supply system to be jetted toward the cutting portion (12). The cutting tool (10) provides through coolant without drilled holes, thereby saving cost.
Description
CUTTING TOOL WITH THROUGH COOLANT
2 BACKGROUND OF THE INVENTION
3 1. Field of the Invention
4 The present invention relates to a cutting tool for machine tools.
2. Description of the Prior Arts 6 A great deal of heat and chips are generated in a machining process, 7 and therefore coolant is jetted directly toward a cutting area to remove heat and 8 evacuate chips.
9 In a general machine tool, the coolant is delivered to a position nearby the cutting tool via a coolant circuit, and then the coolant is jetted toward a 11 cutting edge of the cutting tool via an independent nozzle at the end of the 12 coolant circuit. However, both the coolant circuit and the nozzle occupy an 13 inner space of the machine tool, and easily interfere with a workpiece to be 14 machined or other components in the machine tool. As a result, a conventional coolant system in the general machine tool is inconvenient to use.
16 With reference to Fig. 10 and Fig. 11, to solve the interference issue 17 resulting from the coolant circuit and the nozzle, conventional cutting tools 91 18 with internal coolant passages 911 have been developed. The coolant from the 19 machine tool 92, such as coolant delivered by a coolant-through-spindle system of a milling machine, enters the cutting tool 91 via an inner end of the coolant 21 passage 911, and then the coolant is jetted toward the cutting area via coolant 22 outlets formed on an outer annular surface of the cutting tool 91, thereby saving 23 space and improving cooling performance.
24 However, the conventional cutting tools 91 with the coolant passages Date Recue/Date Received 2023-06-08 1 911 have the following shortcomings:
2 First, the coolant passages 911 are formed inside the cutting tools 91 by 3 making multiple elongated holes in each of the cutting tools 91 through 4 drilling. However, the cutting tools 91 are made of high hardness metal, and therefore it is very difficult to drill holes in the cutting tool. As a result, 6 manufacturing costs of the conventional cutting tools 91 with internal coolant 7 passages 911 are tremendous.
8 Second, an outer end of the cutting tool 91 has cutting inserts or has 9 integrally formed cutting edges. In order to ensure the cutting tool 91 has sufficient structural rigidity for machining, the coolant passage 911 cannot 11 extend linearly from the inner end to the outer end of the cutting tool 91, but 12 instead has to make a turn before reaching the outer end to avoid the cutting 13 inserts or the cutting edges. As a result, the coolant may fail to cool down the 14 cutting area because the coolant is blocked by the workpiece 93 or due to other reasons, and resulting in a poor cooling performance.
16 Third, because the coolant passage 911 cannot extend linearly but 17 instead has to make the turn, the coolant passage 911 has higher friction loss, 18 which reduces flow of the coolant and deteriorates cooling performance.
19 To overcome the shortcomings, the present invention provides a cutting tool with through coolant to mitigate or obviate the aforementioned problems.
22 The main objective of the present invention is to provide a cutting tool 23 with through coolant to reduce cost and to improve cooling performance.
24 The cutting tool with through coolant is configured to be connected to a Date Recue/Date Received 2023-06-08 1 machine tool. The machine tool has a tool-fixing hole, and one end of the tool-2 fixing hole is connected to a coolant-supply system. The cutting tool is 3 configured to be mounted in another end of the tool-fixing hole. The cutting 4 tool has a shank and a cutting portion. The shank is elongated, and two opposite ends of the shank are respectively a shank-outer end and a shank-inner 6 end. An outer peripheral surface of the shank is configured to be surrounded 7 and tightly held by a hole-wall defined by the tool-fixing hole. At least one 8 coolant-guiding recess is formed in the outer peripheral surface of the shank.
9 Each of the at least one coolant-guiding recess extends along a lengthwise direction of the shank, and is configured to form a coolant channel together 11 with the hole-wall of the tool-fixing hole. An end of the coolant channel is 12 connected to the coolant-supply system. The cutting portion is formed on the 13 shank-outer end of the shank and is configured to protrude out from the tool-14 fixing hole. The cutting portion has at least one cutting edge formed on the cutting portion, or at least one insert is removably mounted to the cutting 16 portion. A cross-sectional area of each of the at least one coolant-guiding recess 17 gradually reduces from the shank-inner end of the shank toward the cutting 18 portion. The coolant channel formed by the at least one coolant-guiding recess 19 enables coolant from the coolant-supply system to be jetted toward the cutting portion.
21 Installation and use of the present invention is same as that of 22 conventional cutting tools: install the cutting tool to the machine tool with a 23 specialized coolant-supply system, such as a milling machine with a through-24 spindle coolant system. After installation of the cutting tool, the coolant-Date Recue/Date Received 2023-06-08 1 guiding recess on the shank forms the coolant channel, thereby providing the 2 cutting tool with through coolant function.
3 Advantages of the present invention are as follows:
4 First, the coolant channel is formed by the coolant-guiding recess together with the hole-wall of the tool-fixing hole, and forming of the coolant-6 guiding recess requires only machining on the outer peripheral surface of the 7 shank. The coolant-guiding recess provides coolant through function when 8 installed on the machine tool, thereby saving tremendous machining cost.
9 In other words, in terms of forming the of coolant channel, the present invention replaces the conventional deep-hole-drilling process with grooving 11 on the outer peripheral surface of the shank. The present invention is capable of 12 saving tremendous machining cost because grooving on the outer peripheral 13 surface is far more easier than deep-hole-drilling.
14 Second, because the coolant-guiding recess is formed on the outer peripheral surface of the shank and extends along the lengthwise direction of 16 the shank, the coolant is naturally jetted toward the cutting edge or the insert 17 when the cutting portion is narrower than the shank, or the coolant naturally 18 travels along an outer surface of the cutting portion to the cutting edge or the 19 insert when the cutting portion is wider than the shank. As a result, the present invention enables the coolant to continuously cool down a cutting area by 21 preventing the coolant from being blocked by the workpiece or fail to cool 22 down the cutting area due to any other reason.
23 Third, due to position and shape of the coolant-guiding recess, the 24 coolant-guiding recess can extend linearly without turning, and therefore Date Recue/Date Received 2023-06-08 1 greatly reduces friction loss. In other words, the present invention improves 2 cooling performance by eliminating inevitable turning in the conventional 3 cutting tool.
4 Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in 6 conjunction with the accompanying drawings.
8 Fig. 1 is a perspective view of a cutting tool with through coolant in 9 accordance with the present invention;
Fig. 2 is a schematic side view of the cutting tool in Fig. 1, showing the 11 cutting tool mounted to a tool holder of a machine tool;
12 Fig. 3 is a sectional top view of the cutting tool taken along line 3-3 in 13 Fig. 2;
14 Fig. 4 is a schematic operational side view of the cutting tool in Fig. 1, showing the cutting tool cutting a side surface of a workpiece to form a groove;
16 Fig. 5 is a block diagram, showing the tool holder in Fig. 2 connected 17 to a coolant-supply system;
18 Fig. 6 is a schematic side view of a second embodiment of a cutting 19 tool in accordance with the present invention;
Fig. 7A is a perspective view of a third embodiment of a cutting tool in 21 accordance with the present invention;
22 Fig. 7B is a sectional side view of the cutting tool in Fig. 7A;
23 Fig. 8 is a schematic side view of a fourth embodiment of a cutting tool 24 in accordance with the present invention;
2. Description of the Prior Arts 6 A great deal of heat and chips are generated in a machining process, 7 and therefore coolant is jetted directly toward a cutting area to remove heat and 8 evacuate chips.
9 In a general machine tool, the coolant is delivered to a position nearby the cutting tool via a coolant circuit, and then the coolant is jetted toward a 11 cutting edge of the cutting tool via an independent nozzle at the end of the 12 coolant circuit. However, both the coolant circuit and the nozzle occupy an 13 inner space of the machine tool, and easily interfere with a workpiece to be 14 machined or other components in the machine tool. As a result, a conventional coolant system in the general machine tool is inconvenient to use.
16 With reference to Fig. 10 and Fig. 11, to solve the interference issue 17 resulting from the coolant circuit and the nozzle, conventional cutting tools 91 18 with internal coolant passages 911 have been developed. The coolant from the 19 machine tool 92, such as coolant delivered by a coolant-through-spindle system of a milling machine, enters the cutting tool 91 via an inner end of the coolant 21 passage 911, and then the coolant is jetted toward the cutting area via coolant 22 outlets formed on an outer annular surface of the cutting tool 91, thereby saving 23 space and improving cooling performance.
24 However, the conventional cutting tools 91 with the coolant passages Date Recue/Date Received 2023-06-08 1 911 have the following shortcomings:
2 First, the coolant passages 911 are formed inside the cutting tools 91 by 3 making multiple elongated holes in each of the cutting tools 91 through 4 drilling. However, the cutting tools 91 are made of high hardness metal, and therefore it is very difficult to drill holes in the cutting tool. As a result, 6 manufacturing costs of the conventional cutting tools 91 with internal coolant 7 passages 911 are tremendous.
8 Second, an outer end of the cutting tool 91 has cutting inserts or has 9 integrally formed cutting edges. In order to ensure the cutting tool 91 has sufficient structural rigidity for machining, the coolant passage 911 cannot 11 extend linearly from the inner end to the outer end of the cutting tool 91, but 12 instead has to make a turn before reaching the outer end to avoid the cutting 13 inserts or the cutting edges. As a result, the coolant may fail to cool down the 14 cutting area because the coolant is blocked by the workpiece 93 or due to other reasons, and resulting in a poor cooling performance.
16 Third, because the coolant passage 911 cannot extend linearly but 17 instead has to make the turn, the coolant passage 911 has higher friction loss, 18 which reduces flow of the coolant and deteriorates cooling performance.
19 To overcome the shortcomings, the present invention provides a cutting tool with through coolant to mitigate or obviate the aforementioned problems.
22 The main objective of the present invention is to provide a cutting tool 23 with through coolant to reduce cost and to improve cooling performance.
24 The cutting tool with through coolant is configured to be connected to a Date Recue/Date Received 2023-06-08 1 machine tool. The machine tool has a tool-fixing hole, and one end of the tool-2 fixing hole is connected to a coolant-supply system. The cutting tool is 3 configured to be mounted in another end of the tool-fixing hole. The cutting 4 tool has a shank and a cutting portion. The shank is elongated, and two opposite ends of the shank are respectively a shank-outer end and a shank-inner 6 end. An outer peripheral surface of the shank is configured to be surrounded 7 and tightly held by a hole-wall defined by the tool-fixing hole. At least one 8 coolant-guiding recess is formed in the outer peripheral surface of the shank.
9 Each of the at least one coolant-guiding recess extends along a lengthwise direction of the shank, and is configured to form a coolant channel together 11 with the hole-wall of the tool-fixing hole. An end of the coolant channel is 12 connected to the coolant-supply system. The cutting portion is formed on the 13 shank-outer end of the shank and is configured to protrude out from the tool-14 fixing hole. The cutting portion has at least one cutting edge formed on the cutting portion, or at least one insert is removably mounted to the cutting 16 portion. A cross-sectional area of each of the at least one coolant-guiding recess 17 gradually reduces from the shank-inner end of the shank toward the cutting 18 portion. The coolant channel formed by the at least one coolant-guiding recess 19 enables coolant from the coolant-supply system to be jetted toward the cutting portion.
21 Installation and use of the present invention is same as that of 22 conventional cutting tools: install the cutting tool to the machine tool with a 23 specialized coolant-supply system, such as a milling machine with a through-24 spindle coolant system. After installation of the cutting tool, the coolant-Date Recue/Date Received 2023-06-08 1 guiding recess on the shank forms the coolant channel, thereby providing the 2 cutting tool with through coolant function.
3 Advantages of the present invention are as follows:
4 First, the coolant channel is formed by the coolant-guiding recess together with the hole-wall of the tool-fixing hole, and forming of the coolant-6 guiding recess requires only machining on the outer peripheral surface of the 7 shank. The coolant-guiding recess provides coolant through function when 8 installed on the machine tool, thereby saving tremendous machining cost.
9 In other words, in terms of forming the of coolant channel, the present invention replaces the conventional deep-hole-drilling process with grooving 11 on the outer peripheral surface of the shank. The present invention is capable of 12 saving tremendous machining cost because grooving on the outer peripheral 13 surface is far more easier than deep-hole-drilling.
14 Second, because the coolant-guiding recess is formed on the outer peripheral surface of the shank and extends along the lengthwise direction of 16 the shank, the coolant is naturally jetted toward the cutting edge or the insert 17 when the cutting portion is narrower than the shank, or the coolant naturally 18 travels along an outer surface of the cutting portion to the cutting edge or the 19 insert when the cutting portion is wider than the shank. As a result, the present invention enables the coolant to continuously cool down a cutting area by 21 preventing the coolant from being blocked by the workpiece or fail to cool 22 down the cutting area due to any other reason.
23 Third, due to position and shape of the coolant-guiding recess, the 24 coolant-guiding recess can extend linearly without turning, and therefore Date Recue/Date Received 2023-06-08 1 greatly reduces friction loss. In other words, the present invention improves 2 cooling performance by eliminating inevitable turning in the conventional 3 cutting tool.
4 Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in 6 conjunction with the accompanying drawings.
8 Fig. 1 is a perspective view of a cutting tool with through coolant in 9 accordance with the present invention;
Fig. 2 is a schematic side view of the cutting tool in Fig. 1, showing the 11 cutting tool mounted to a tool holder of a machine tool;
12 Fig. 3 is a sectional top view of the cutting tool taken along line 3-3 in 13 Fig. 2;
14 Fig. 4 is a schematic operational side view of the cutting tool in Fig. 1, showing the cutting tool cutting a side surface of a workpiece to form a groove;
16 Fig. 5 is a block diagram, showing the tool holder in Fig. 2 connected 17 to a coolant-supply system;
18 Fig. 6 is a schematic side view of a second embodiment of a cutting 19 tool in accordance with the present invention;
Fig. 7A is a perspective view of a third embodiment of a cutting tool in 21 accordance with the present invention;
22 Fig. 7B is a sectional side view of the cutting tool in Fig. 7A;
23 Fig. 8 is a schematic side view of a fourth embodiment of a cutting tool 24 in accordance with the present invention;
5 Date Recue/Date Received 2023-06-08 1 Fig. 9 is a schematic side view of a fifth embodiment of a cutting tool 2 in accordance with the present invention;
3 Fig. 10 is an operational side view of a conventional cutting tool with 4 through coolant, showing the cutting tool cutting a side surface of a workpiece to form a groove; and
3 Fig. 10 is an operational side view of a conventional cutting tool with 4 through coolant, showing the cutting tool cutting a side surface of a workpiece to form a groove; and
6 Fig. 11 is an operational side view of another conventional cutting tool
7 with through coolant.
8 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
9 With reference to Figs. 1 to 3 and Fig. 5, a cutting tool 10 with through coolant in accordance with the present invention is configured to be connected 11 to a machine tool 92. The machine tool 92 has a tool-fixing hole 921, and an 12 end of the tool-fixing hole 921 is connected to a coolant-supply system 922 (as 13 shown in Fig. 5). The cutting tool 10 is configured to be mounted in another 14 end of the tool-fixing hole 921. The coolant-supply system 922 pumps coolant to the tool-fixing hole 921 such that the coolant is forced to spurt from the 16 cutting tool 10.
17 The machine tool 92 is preferably a milling machine, and the cutting 18 tool 10 is preferably a milling cutter. The cutting tool 10 is fixed to a spindle 19 924 (as shown in Fig. 2) of the machine tool 92 via a tool holder 923.
The tool-fixing hole 921 is formed through the tool holder 923. A coolant-supply system 21 922 is connected to an upper end of the tool holder 923 and pumps coolant to 22 the tool-fixing hole 921 via a top opening of the tool-fixing hole 921.
23 The cutting tool 10 is mounted in the tool-fixing hole 921 via a bottom 24 opening of the tool-fixing hole 921. In the preferred embodiment, the coolant-Date Recue/Date Received 2023-06-08 1 supply system 922 is a through-spindle coolant system of the milling machine.
2 The coolant-supply system 922 is a conventional standard system;
therefore, 3 detailed description of the coolant-supply system 922 is omitted.
4 The cutting tool 10 has a shank 11 and a cutting portion 12. The shank 11 is elongated, and is preferably a round rod. An outer peripheral surface of 6 the shank 11 is surrounded and tightly held by a hole-wall defined by the tool-7 fixing hole 921 such that the cutting tool 10 is fixed to the machine tool 92.
8 Multiple coolant-guiding recesses 111 are formed in the outer 9 peripheral surface of the shank 11. Each of the coolant-guiding recesses extends along a lengthwise direction of the shank 11, and is configured to form 11 a coolant channel 112 together with the hole-wall of the tool-fixing hole 921.
12 An end of the coolant channel 112 is connected to the coolant-supply system 13 922, allowing the coolant-supply system 922 to pump coolant to the coolant 14 channel 112 via said end. Each of the coolant-guiding recesses 111 preferably extends linearly. In the preferred embodiment, the coolant-guiding recess 111 is 16 only formed in the shank 11, but the coolant-guiding recess 111 is not limited 17 thereto. In another preferred embodiment, the coolant-guiding recess 111 18 extends to the cutting portion 12.
19 Two opposite ends of the shank 11 are respectively a shank-outer end 113 and a shank-inner end 114. The shank-inner end 114 is disposed in the 21 tool-fixing hole 921. An end of each of the coolant-guiding recesses 111 22 extends towards the shank-inner end 114 and preferably forms an opening on 23 an end-surface of the shank-inner end 114 such that the coolant can flow into 24 the coolant-guiding recess 111 without making a turn. Another end of the Date Recue/Date Received 2023-06-08 1 coolant-guiding recess 111 preferably extends to the shank-outer end 113, but 2 not limited thereto as long as said another end of the coolant-guiding recess 111 3 protrudes out from the tool-fixing hole 921.
4 The cutting portion 12 is formed on the shank-outer end 113 of the shank 11 and protrudes out from the tool-fixing hole 921. The cutting portion 6 12 has one or multiple cutting edges 121. To be precise, the cutting portion 12 7 is disk-shaped, and is preferably round disk-shaped.
8 The cutting edges 121 are formed on an outer annular surface of the 9 cutting portion 12, and the cutting portion 12 is larger in width than the shank 11 such that the cutting portion 12 is capable of cutting a side surface of a 11 workpiece 93 to form a groove.
12 With reference to Fig. 4, each of the coolant channels 112 formed by 13 the coolant-guiding recess 111 makes the coolant from the coolant-supply 14 system 922 jetted out toward the cutting portion 12. The jetted coolant travels along an outer surface of the cutting portion 12 to the cutting edges 121 such 16 that the cutting portion 12 is continuously cooled down by the coolant when the 17 cutting portion 12 cuts the side surface of the workpiece 93 to form the groove.
18 A cross-sectional area of each of the coolant-guiding recesses 111 19 reduces from the shank-inner end of the shank 11 toward the cutting portion 12 such that the coolant channel 112 gradually becomes narrower, thereby 21 increasing a flow speed of the coolant while exiting the coolant channel 112. To 22 be specific, a width and/or a depth of each of the coolant-guiding recess 111 23 gradually reduces from the shank 11 toward the cutting portion 12, but the 24 coolant-guiding recesses are not limited thereto.
Date Recue/Date Received 2023-06-08 I With reference to Fig. 6, a second embodiment of the present invention 2 is substantially same as the first embodiment mentioned above, but the 3 differences are that the cutting portion 12A is rod-shaped, and the cutting 4 portion 12A is smaller in width than the shank 11A. Moreover, multiple helical chip-flutes 123A are formed in the cutting portion 12A.
6 The cutting portion 12A has no integrally formed cutting edge, but 7 instead one or multiple inserts 122A is/are mounted to the cutting portion 12A.
8 An end of each coolant-guiding recess 111A forms an opening on an end-9 surface of the shank-inner end 114A, and another end of each coolant-guiding recess 111A forms an opening on an end-surface of the shank-outer end 113A.
11 The cutting tool 10A in the second embodiment is preferably an end mill of a 12 face mill.
13 With reference to Fig. 7A and Fig. 7B, a third embodiment of the 14 present invention is substantially same as the second embodiment, but the differences are that the cutting portion 12B is conical. The insert 122B is 16 removably mounted to an outer end of the cutting portion 12B and is disposed 17 on a centerline of the cutting tool 10B. Moreover, the coolant-guiding recesses 18 111B further extend to the cutting portion 12B from the shank-outer end 113B.
19 With reference to Fig. 8, a fourth embodiment of the present invention is substantially same as the second embodiment, but the difference is that 21 multiple cutting edges 121C are formed on an outer annular surface of the rod-22 shaped cutting portion 12C, and each of the cutting edges 121C is preferably 23 helical in shape. An end of each of the coolant-guiding recesses 111C
extends 24 to the cutting portion 12C from the shank-outer end 113C, and is disposed Date Recue/Date Received 2023-06-08 1 between two adjacent ones of the cutting edges 121C.
2 To be precise, multiple helical chip-flutes 123C are formed in the 3 cutting portion 12C, and each of the helical chip-flutes 123C is preferably 4 disposed between two adjacent ones of the cutting edges 121C. An end of each of the coolant-guiding recesses 111C is connected to one of the helical chip-6 flutes 123C to improve chip evacuation performance of the coolant.
7 With reference to Fig. 9, a fifth embodiment of the present invention is 8 substantially same as the second embodiment. An end of each coolant-guiding 9 recess 111D forms an opening on an end-surface of the shank-inner end 114D, and another end of each coolant-guiding recess 111D forms an opening on an 11 end-surface of the shank-outer end 113D. The difference of the fifth 12 embodiment is that the insert 122D is disk-shaped and is replaceable.
13 In summary, by forming the coolant-guiding recesses 111 in the outer 14 peripheral surface of the shank 11, the cutting tool 10 is capable of providing coolant through function when mounted to the machine tool 92, thereby saving 16 tremendous machining cost.
17 Moreover, because the coolant-guiding recess 11 extends along the 18 lengthwise direction of the shank, 11, the coolant is naturally jetted toward the 19 cutting edges 121 or the inserts 122A when the cutting portion 12 is narrower than the shank 11, or the coolant naturally travels along an outer surface of the 21 cutting portion 12 to the cutting edge 121 or the insert 122A when the cutting 22 portion is wider than the shank. As a result, the present invention enables the 23 coolant to continuously cool down a cutting area. Additionally, the coolant-24 guiding recesses 111 can extend linearly without turning, thereby reducing Date Recue/Date Received 2023-06-08 1 friction loss.
2 Even though numerous characteristics and advantages of the present 3 invention have been set forth in the foregoing description, together with details 4 of the structure and features of the invention, the disclosure is illustrative only.
Changes may be made in the details, especially in matters of shape, size, and 6 arrangement of parts within the principles of the invention to the full extent 7 indicated by the broad general meaning of the terms in which the appended 8 claims are expressed.
it Date Recue/Date Received 2023-06-08
17 The machine tool 92 is preferably a milling machine, and the cutting 18 tool 10 is preferably a milling cutter. The cutting tool 10 is fixed to a spindle 19 924 (as shown in Fig. 2) of the machine tool 92 via a tool holder 923.
The tool-fixing hole 921 is formed through the tool holder 923. A coolant-supply system 21 922 is connected to an upper end of the tool holder 923 and pumps coolant to 22 the tool-fixing hole 921 via a top opening of the tool-fixing hole 921.
23 The cutting tool 10 is mounted in the tool-fixing hole 921 via a bottom 24 opening of the tool-fixing hole 921. In the preferred embodiment, the coolant-Date Recue/Date Received 2023-06-08 1 supply system 922 is a through-spindle coolant system of the milling machine.
2 The coolant-supply system 922 is a conventional standard system;
therefore, 3 detailed description of the coolant-supply system 922 is omitted.
4 The cutting tool 10 has a shank 11 and a cutting portion 12. The shank 11 is elongated, and is preferably a round rod. An outer peripheral surface of 6 the shank 11 is surrounded and tightly held by a hole-wall defined by the tool-7 fixing hole 921 such that the cutting tool 10 is fixed to the machine tool 92.
8 Multiple coolant-guiding recesses 111 are formed in the outer 9 peripheral surface of the shank 11. Each of the coolant-guiding recesses extends along a lengthwise direction of the shank 11, and is configured to form 11 a coolant channel 112 together with the hole-wall of the tool-fixing hole 921.
12 An end of the coolant channel 112 is connected to the coolant-supply system 13 922, allowing the coolant-supply system 922 to pump coolant to the coolant 14 channel 112 via said end. Each of the coolant-guiding recesses 111 preferably extends linearly. In the preferred embodiment, the coolant-guiding recess 111 is 16 only formed in the shank 11, but the coolant-guiding recess 111 is not limited 17 thereto. In another preferred embodiment, the coolant-guiding recess 111 18 extends to the cutting portion 12.
19 Two opposite ends of the shank 11 are respectively a shank-outer end 113 and a shank-inner end 114. The shank-inner end 114 is disposed in the 21 tool-fixing hole 921. An end of each of the coolant-guiding recesses 111 22 extends towards the shank-inner end 114 and preferably forms an opening on 23 an end-surface of the shank-inner end 114 such that the coolant can flow into 24 the coolant-guiding recess 111 without making a turn. Another end of the Date Recue/Date Received 2023-06-08 1 coolant-guiding recess 111 preferably extends to the shank-outer end 113, but 2 not limited thereto as long as said another end of the coolant-guiding recess 111 3 protrudes out from the tool-fixing hole 921.
4 The cutting portion 12 is formed on the shank-outer end 113 of the shank 11 and protrudes out from the tool-fixing hole 921. The cutting portion 6 12 has one or multiple cutting edges 121. To be precise, the cutting portion 12 7 is disk-shaped, and is preferably round disk-shaped.
8 The cutting edges 121 are formed on an outer annular surface of the 9 cutting portion 12, and the cutting portion 12 is larger in width than the shank 11 such that the cutting portion 12 is capable of cutting a side surface of a 11 workpiece 93 to form a groove.
12 With reference to Fig. 4, each of the coolant channels 112 formed by 13 the coolant-guiding recess 111 makes the coolant from the coolant-supply 14 system 922 jetted out toward the cutting portion 12. The jetted coolant travels along an outer surface of the cutting portion 12 to the cutting edges 121 such 16 that the cutting portion 12 is continuously cooled down by the coolant when the 17 cutting portion 12 cuts the side surface of the workpiece 93 to form the groove.
18 A cross-sectional area of each of the coolant-guiding recesses 111 19 reduces from the shank-inner end of the shank 11 toward the cutting portion 12 such that the coolant channel 112 gradually becomes narrower, thereby 21 increasing a flow speed of the coolant while exiting the coolant channel 112. To 22 be specific, a width and/or a depth of each of the coolant-guiding recess 111 23 gradually reduces from the shank 11 toward the cutting portion 12, but the 24 coolant-guiding recesses are not limited thereto.
Date Recue/Date Received 2023-06-08 I With reference to Fig. 6, a second embodiment of the present invention 2 is substantially same as the first embodiment mentioned above, but the 3 differences are that the cutting portion 12A is rod-shaped, and the cutting 4 portion 12A is smaller in width than the shank 11A. Moreover, multiple helical chip-flutes 123A are formed in the cutting portion 12A.
6 The cutting portion 12A has no integrally formed cutting edge, but 7 instead one or multiple inserts 122A is/are mounted to the cutting portion 12A.
8 An end of each coolant-guiding recess 111A forms an opening on an end-9 surface of the shank-inner end 114A, and another end of each coolant-guiding recess 111A forms an opening on an end-surface of the shank-outer end 113A.
11 The cutting tool 10A in the second embodiment is preferably an end mill of a 12 face mill.
13 With reference to Fig. 7A and Fig. 7B, a third embodiment of the 14 present invention is substantially same as the second embodiment, but the differences are that the cutting portion 12B is conical. The insert 122B is 16 removably mounted to an outer end of the cutting portion 12B and is disposed 17 on a centerline of the cutting tool 10B. Moreover, the coolant-guiding recesses 18 111B further extend to the cutting portion 12B from the shank-outer end 113B.
19 With reference to Fig. 8, a fourth embodiment of the present invention is substantially same as the second embodiment, but the difference is that 21 multiple cutting edges 121C are formed on an outer annular surface of the rod-22 shaped cutting portion 12C, and each of the cutting edges 121C is preferably 23 helical in shape. An end of each of the coolant-guiding recesses 111C
extends 24 to the cutting portion 12C from the shank-outer end 113C, and is disposed Date Recue/Date Received 2023-06-08 1 between two adjacent ones of the cutting edges 121C.
2 To be precise, multiple helical chip-flutes 123C are formed in the 3 cutting portion 12C, and each of the helical chip-flutes 123C is preferably 4 disposed between two adjacent ones of the cutting edges 121C. An end of each of the coolant-guiding recesses 111C is connected to one of the helical chip-6 flutes 123C to improve chip evacuation performance of the coolant.
7 With reference to Fig. 9, a fifth embodiment of the present invention is 8 substantially same as the second embodiment. An end of each coolant-guiding 9 recess 111D forms an opening on an end-surface of the shank-inner end 114D, and another end of each coolant-guiding recess 111D forms an opening on an 11 end-surface of the shank-outer end 113D. The difference of the fifth 12 embodiment is that the insert 122D is disk-shaped and is replaceable.
13 In summary, by forming the coolant-guiding recesses 111 in the outer 14 peripheral surface of the shank 11, the cutting tool 10 is capable of providing coolant through function when mounted to the machine tool 92, thereby saving 16 tremendous machining cost.
17 Moreover, because the coolant-guiding recess 11 extends along the 18 lengthwise direction of the shank, 11, the coolant is naturally jetted toward the 19 cutting edges 121 or the inserts 122A when the cutting portion 12 is narrower than the shank 11, or the coolant naturally travels along an outer surface of the 21 cutting portion 12 to the cutting edge 121 or the insert 122A when the cutting 22 portion is wider than the shank. As a result, the present invention enables the 23 coolant to continuously cool down a cutting area. Additionally, the coolant-24 guiding recesses 111 can extend linearly without turning, thereby reducing Date Recue/Date Received 2023-06-08 1 friction loss.
2 Even though numerous characteristics and advantages of the present 3 invention have been set forth in the foregoing description, together with details 4 of the structure and features of the invention, the disclosure is illustrative only.
Changes may be made in the details, especially in matters of shape, size, and 6 arrangement of parts within the principles of the invention to the full extent 7 indicated by the broad general meaning of the terms in which the appended 8 claims are expressed.
it Date Recue/Date Received 2023-06-08
Claims (9)
1. A cutting tool with through coolant, configured to be connected to a machine tool; the machine tool having a tool-fixing hole; one end of the tool-fixing hole connected to a coolant-supply system; the cutting tool configured to be mounted in another end of the tool-fixing hole and comprising:
a shank being elongated; two opposite ends of the shank being respectively a shank-outer end and a shank-inner end; an outer peripheral surface of the shank configured to be surrounded and tightly held by a hole-wall defined by the tool-fixing hole; at least one coolant-guiding recess formed in the outer peripheral surface of the shank; each of the at least one coolant-guiding recess extending along a lengthwise direction of the shank, and configured to form a coolant channel together with the hole-wall of the tool-fixing hole; an end of the coolant channel connected to the coolant-supply system;
a cutting portion formed on the shank-outer end of the shank and configured to protrude out from the tool-fixing hole; at least one cutting edge formed on the cutting portion, or at least one insert removably mounted to the cutting portion; a cross-sectional area of each of the at least one coolant-guiding recess gradually reducing from the shank-inner end of the shank toward the cutting portion;
wherein, the coolant channel formed by the at least one coolant-guiding recess enables coolant from the coolant-supply system to be jetted toward the cutting portion.
a shank being elongated; two opposite ends of the shank being respectively a shank-outer end and a shank-inner end; an outer peripheral surface of the shank configured to be surrounded and tightly held by a hole-wall defined by the tool-fixing hole; at least one coolant-guiding recess formed in the outer peripheral surface of the shank; each of the at least one coolant-guiding recess extending along a lengthwise direction of the shank, and configured to form a coolant channel together with the hole-wall of the tool-fixing hole; an end of the coolant channel connected to the coolant-supply system;
a cutting portion formed on the shank-outer end of the shank and configured to protrude out from the tool-fixing hole; at least one cutting edge formed on the cutting portion, or at least one insert removably mounted to the cutting portion; a cross-sectional area of each of the at least one coolant-guiding recess gradually reducing from the shank-inner end of the shank toward the cutting portion;
wherein, the coolant channel formed by the at least one coolant-guiding recess enables coolant from the coolant-supply system to be jetted toward the cutting portion.
2. The cutting tool as claimed in claim 1, wherein each of the at least one coolant-guiding recess extends linearly.
3. The cutting tool as claimed in claim 1, wherein an end of the at least one coolant-guiding recess extends toward the shank-inner end and forms an opening on an end-surface of the shank-inner end.
4. The cutting tool as claimed in claim 1, wherein the cutting portion is disk-shaped, and the cutting portion is larger in width than the shank;
the at least one cutting edge includes a plurality of the cutting edges formed on an outer annular surface of the cutting portion and disposed around the cutting portion.
the at least one cutting edge includes a plurality of the cutting edges formed on an outer annular surface of the cutting portion and disposed around the cutting portion.
5. The cutting tool as claimed in claim 1, wherein the cutting portion is rod-shaped, and the cutting portion is smaller in width than the shank;
the at least one insert is removably mounted to the cutting portion.
the at least one insert is removably mounted to the cutting portion.
6. The cutting tool as claimed in claim 1, wherein an end of each of the at least one coolant-guiding recess extends to the cutting portion.
7. The cutting tool as claimed in claim 1, wherein the cutting portion is rod-shaped, and the at least one cutting edge includes a plurality of the cutting edges formed on an outer annular surface of the cutting portion;
an end of each of the at least one coolant-guiding recess extends toward the cutting portion and is disposed between two adjacent ones of the cutting edges.
an end of each of the at least one coolant-guiding recess extends toward the cutting portion and is disposed between two adjacent ones of the cutting edges.
8. The cutting tool as claimed in claim 1, wherein the cutting portion is rod-shaped, and a plurality of helical chip-flutes are formed on the cutting portion;
an end of each of the at least one coolant-guiding recess extends toward the cutting portion and is connected to one of the helical chip-flutes.
an end of each of the at least one coolant-guiding recess extends toward the cutting portion and is connected to one of the helical chip-flutes.
9. The cutting tool as claimed in any one of claims 4 to 8, wherein the cutting tool is a milling cutter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW111131144A TWI842065B (en) | 2022-08-18 | Cutting tools with cooling water | |
| TW111131144 | 2022-08-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3202412A1 true CA3202412A1 (en) | 2024-02-18 |
Family
ID=89896998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3202412A Pending CA3202412A1 (en) | 2022-08-18 | 2023-06-08 | Cutting tool with through coolant |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA3202412A1 (en) |
-
2023
- 2023-06-08 CA CA3202412A patent/CA3202412A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| TW202408717A (en) | 2024-03-01 |
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