WO2018083743A1 - 先端交換式切削工具の本体部及び先端交換式切削工具 - Google Patents
先端交換式切削工具の本体部及び先端交換式切削工具 Download PDFInfo
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- WO2018083743A1 WO2018083743A1 PCT/JP2016/082494 JP2016082494W WO2018083743A1 WO 2018083743 A1 WO2018083743 A1 WO 2018083743A1 JP 2016082494 W JP2016082494 W JP 2016082494W WO 2018083743 A1 WO2018083743 A1 WO 2018083743A1
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- WIPO (PCT)
- Prior art keywords
- female
- cutting tool
- main body
- tip
- metal material
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/005—Cylindrical shanks of tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/11—Retention by threaded connection
- B23B31/1107—Retention by threaded connection for conical parts
- B23B31/1122—Retention by threaded connection for conical parts using cylindrical threads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G5/00—Thread-cutting tools; Die-heads
- B23G5/02—Thread-cutting tools; Die-heads without means for adjustment
- B23G5/06—Taps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2231/00—Details of chucks, toolholder shanks or tool shanks
- B23B2231/02—Features of shanks of tools not relating to the operation performed by the tool
- B23B2231/0204—Connection of shanks to working elements of tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/02—Connections between shanks and removable cutting heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/02—Connections between the shanks and detachable cutting heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/03—Cutting heads comprised of different material than the shank irrespective of whether the head is detachable from the shank
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2240/00—Details of connections of tools or workpieces
- B23C2240/32—Connections using screw threads
Definitions
- the present invention relates to a main body portion of a tip exchange type cutting tool and a tip exchange type cutting tool.
- a tip exchange type cutting tool in which a cutting head can be attached to and detached from a main body is known.
- the tip exchange type cutting tool can replace only the cutting head and reuse the main body.
- both the main body and the cutting head are made of cemented carbide, the tip-replaceable cutting tool is damaged by vibration due to vibration of the male thread or female thread that connects the main body and the cutting head. It's easy to do.
- Patent Document 1 a helical screw having a lower rigidity than cemented carbide is attached to a female screw portion formed at an end portion of a main body portion, and a male screw formed at the end portion of a cutting head is attached to the helicate.
- the cutting tool which fixes a main-body part and a cutting head by screwing a part is disclosed.
- the diameter of the external thread formed at the end of the cutting head and the size of the main body are constant, the diameter of the internal thread is increased by the amount of helicate. There is a need. As a result, the radial thickness of the main body portion formed of the cemented carbide is reduced, and the rigidity is reduced.
- An object of the present invention is to provide a body part and a tip exchange type of a tip exchange type cutting tool capable of suppressing vibration during cutting while maintaining the rigidity of the body part when the body part and the cutting head are configured to be detachable. It is to provide a cutting tool.
- the main body portion of the tip exchange type cutting tool according to the first aspect of the present invention is a main body portion of the tip exchange type cutting tool, and is formed of a first metal material and extends in the axial direction.
- a female screw portion provided on the inner periphery of the cylindrical portion and capable of being screwed with a male screw portion of the cutting head, the female screw top side of the female screw root of the female screw portion, and the female screw portion.
- the first metal material is a second metal material different from the first metal material, which is a portion from the portion corresponding to the effective diameter to the top of the female screw valley from the portion corresponding to the bottom of the female screw to the top of the female screw.
- a second female thread portion made of the first metal material, which is a portion continuous with the female thread portion and the inner periphery of the cylindrical portion, and is a portion other than the first female thread portion of the female thread portion. And a female screw portion.
- the male screw portion of the cutting head is screwed into a female screw portion having a first female screw portion and a second female screw portion.
- the first female thread part is made of a metal material with relatively low rigidity
- the second female thread part and the cylinder part are made of metal materials with relatively high rigidity, so that the rigidity of the main body part is maintained and the main body part and the cutting are cut. It is possible to simultaneously reduce the possibility that the thread of the external thread part or the internal thread part connecting the head is lost due to an impact caused by vibration.
- the first metal material may be an alloy having a density of 10 g / cm 3 or more
- the second metal material is a steel metal.
- the rigidity of the cylindrical portion can be ensured by forming the cylindrical portion of the main body portion of the first metal material having a density of 10 g / cm 3 or more.
- the main part of the tip-exchangeable cutting tool is made of steel metal as the first female thread part, so that the thread of the male thread part or female thread part that connects the main body part and the cutting head is lost due to the impact of vibration. The possibility of doing so can be reduced.
- the radial thickness of the cylindrical portion may be larger than the radial thickness of the female screw portion.
- the thickness of the cylindrical portion in the radial direction of the main body portion of the tip exchange type cutting tool is larger than the radial thickness of the female screw portion, the rigidity of the cylindrical portion can be ensured.
- the tip of the cylindrical part and the female thread part is made of the second metal material and is continuous with the male thread part of the cutting head
- tip part which accommodates the taper part whose diameter is small as the thread part side.
- the main body portion of the tip exchange type cutting tool can accommodate a taper portion continuous with the male screw portion of the cutting head by the tip portion made of the second metal material.
- the body part of the tip-replaceable cutting tool has a possibility that the thread of the male thread part or the female thread part that connects the body part and the cutting head may be lost due to the impact of vibration compared to the case where there is no tip part. It can be reduced more.
- the main body of the tip replaceable cutting tool according to the second aspect of the present invention is screwed into the main thread of the tip replaceable cutting tool of the first aspect and the female thread of the main body, the first female screw And a cutting head having a male thread portion that comes into contact with both the second female thread portion and the second female thread portion.
- the male thread portion of the cutting head is screwed into a female thread portion having a first female thread portion and a second female thread portion.
- the first female thread part is made of a metal material with relatively low rigidity
- the second female thread part and the cylinder part are made of metal materials with relatively high rigidity, so that the rigidity of the main body part is maintained and the main body part and the cutting are cut. It is possible to simultaneously reduce the possibility that the thread of the external thread part or the internal thread part connecting the head is lost due to an impact caused by vibration.
- the tip exchange-type cutting tool uses the first female thread portion to reduce the impact caused by vibration while the external thread portion or female thread portion connecting the main body portion and the cutting head reduces the impact caused by vibration.
- the cutting head and the main body can be firmly fastened.
- FIG. 1 is a partial cross-sectional view of a cutting tool 1 including a cutting head 2 and a main body 3. It is the figure which expanded the part of the external thread part 24 and internal thread part 33 of sectional drawing of FIG. 5 is an explanatory diagram of a manufacturing process of the main body 3.
- FIG. It is a graph which shows the evaluation test result of an Example. It is a graph which shows the evaluation test result of a comparative example.
- FIG. 1 the configuration of each part of a tip-replaceable cutting tool (hereinafter referred to as a cutting tool) 1 of the present invention will be described.
- the axis of the cutting tool 1 is indicated by AX, and in the axial direction along the axis AX, the side on which the blade 21 of the cutting head 2 is provided with respect to the main body 3 is defined as the tip side and the tip side. The opposite side is called the rear end side.
- a direction away from the axis AX on a plane perpendicular to the axial direction is referred to as a radial direction.
- the cutting tool 1 is a cutting tool that is rotationally driven by a machining center or the like to cut a workpiece. More specifically, the cutting tool 1 is a tip exchange type cutting tool that includes a cutting head 2 and a main body 3, and the cutting head 2 can be attached to and detached from the main body 3.
- the cutting head 2 is made of a cemented carbide obtained by pressure-sintering tungsten carbide or the like.
- the cutting head 2 includes a blade part 21, a body part 22, a taper part 23, and a male thread part 24 in this order from the front end side to the rear end side in the axial direction.
- the blade part 21 is a part for cutting a work material, and has a known outer peripheral blade, a bottom blade, a tip pocket, a gash, and the like.
- the body portion 22 and the taper portion 23 are disposed between the blade portion 21 and the external thread portion 24.
- the diameter of the trunk portion 22 is larger than the diameter of the tapered portion 23.
- the surface 25 connected to the tapered portion 23 is a plane substantially perpendicular to the axial direction.
- the tapered portion 23 has a tapered shape with a smaller diameter toward the male screw portion 24 side.
- the male thread portion 24 is connected to the rear end of the tapered portion 23, and a screw is threaded on the outer periphery.
- the main body 3 is a main body of a tip-exchangeable cutting tool extending in the axial direction to which the cutting head 2 can be attached and detached.
- the main body 3 includes a distal end portion 31, a cylindrical portion 32, a female screw portion 33, and a bottom portion 39.
- the tip portion 31 is provided on the tip side in the axial direction, and comes into contact with the surface 25 of the cutting head 2 when the cutting head 2 is mounted on the main body portion 3.
- the rear end of the front end portion 31 is connected to the front ends of the cylindrical portion 32 and the female screw portion 33.
- the distal end portion 31 is a cylindrical portion that is made of the second metal material and accommodates the tapered portion 23 that is continuous with the external thread portion 24 of the cutting head 2 at the distal ends of the cylindrical portion 32 and the internal thread portion 33.
- the cylindrical portion 32 is a cylindrical portion having a diameter D that is made of the first metal material and extends in the axial direction.
- the female thread portion 33 is a portion in which a female screw that can be screwed with the male thread portion 24 of the cutting head 2 provided on the virtual inner periphery 40 of the cylindrical portion 32 is formed.
- the internal thread inner diameter of the internal thread portion 33 is D3, and the internal thread valley diameter is D1.
- the female thread part 33 includes a first female thread part 34 and a second female thread part 35.
- the first female thread portion 34 is formed from the female thread crest 37 side of the female thread valley bottom 36 of the female thread portion 33 and from the portion of the female screw section 33 corresponding to the effective diameter D2 of the female thread portion 33 to the female thread valley bottom 36 side. This is the portion of the portion 33 up to the female screw crest 37.
- the first female thread portion 34 is made of a second metal material different from the first metal material. As shown in FIG. 1, the first female thread portion 34 of the present example has a female thread more than the female thread crest 26 in a state where the male thread portion 24 of the cutting head 2 is fastened to the female thread portion 33 of the main body 3. The portion from the top of the female thread 33 to the top of the female thread 33 from the portion closer to the female thread root 36 than the portion 38 corresponding to the effective diameter D2 of the female thread 33.
- the second female screw portion 35 is a portion that is continuous with the virtual inner periphery 40 of the cylindrical portion 32 and is a portion other than the first female screw portion 34 of the female screw portion 33.
- the virtual inner periphery 40 of the cylindrical portion 32 is defined as a portion where the second female thread portion 35 connects the female thread valley bottom 36 in the axial direction.
- the second female thread portion 35 is made of the same first metal material as the cylindrical portion 32.
- the radial thickness T1 of the cylindrical portion 32 is thicker than the radial thickness T2 of the female screw portion 33.
- the bottom portion 39 is a portion provided on the rear end side of the female screw portion 33.
- the bottom 39 is a part that forms the bottom of the hole formed by the tip 31 and the female thread 33 of the main body 3.
- the bottom portion 39 is made of the same second metal material as the first female screw portion 34.
- the first metal material and the second metal material are selected in consideration of the material of the cutting head 2. Specifically, the rigidity of the first metal material may be larger than the rigidity of the second metal material. preferable. Since the cutting head 2 of this example is made of cemented carbide, in the main body 3, for example, the first metal material is, for example, an alloy having a density of 10 g / cm 3 or more. An alloy having a density of 10 g / cm 3 or more is, for example, a cemented carbide alloy or a tungsten alloy.
- the second metal material is a steel metal. Examples of the steel metal include structural steel, spring steel, bearing steel, tool steel, stainless steel, chrome molybdenum steel, and the like.
- the female screw portion 33 of the main body 3 includes a first female screw portion 34 made of a second metal material and a second female screw portion 35 made of a first metal material.
- the male thread part 24 of the cutting head 2 is screwed into the main body part 3 female thread part 33
- the male thread part 24 is connected to the first female thread part 34 of the female thread part 33 and the second female thread part 34. It comes into contact with both the threaded portion 35.
- a second metal material made of steel having a lower rigidity than the first metal material is interposed.
- the external thread portion 24 can be firmly tightened and fixed to the internal thread portion 33. Therefore, the vibration of the cutting head 2 during cutting can be further suppressed. Thereby, since the defect
- FIG. 3 the manufacturing method of the cutting tool 1 is demonstrated.
- a member 41 made of the first metal material and a member 42 made of the second metal material are prepared, and the member 42 is fitted to the member 41 (fitting process).
- the member 41 is a columnar member having a diameter D, and has a concave portion of about D2 centering on an axis AX extending from the front end side toward the rear end side.
- the member 42 has a cylindrical shape with a diameter D on the front end side (upper side in FIG. 3), and has a cylindrical convex portion with a diameter D2 on the rear end side.
- the convex part of the member 42 is fitted into the concave part of the member 41, and the member 41 and the member 42 are joined (joining process).
- the female thread portion 33 is cut into the joined body of the member 41 and the member 42 by using a thread cutting mill or the like (fastening portion forming step). With the above, the main body 3 including the female screw portion 33 is manufactured.
- Test conditions for the examples and comparative examples are as follows.
- the work material is a stainless steel material (SUS304 defined by JIS).
- the processing machine is a vertical machining center.
- the tool diameter is 16 mm.
- the tool protrusion length is 50 mm.
- the cutting speed is 600 m / min.
- the rotation speed is 11,950 min ⁇ 1 .
- the feed rate is 3,580 mm / min.
- the feed is 0.1 mm / t.
- the cut (grooving) is 8 mm.
- the coolant is air blow.
- FIG. 4 shows the test results of the examples
- FIG. 5 shows the test results of the comparative examples. 4 and 5, the vertical axis represents cutting resistance (N) and the horizontal axis represents machining time (s). 4 and 5 show the test results of Fx, Fy, and Fz in order from the top.
- Fx is a vertical component force (main component force) that works in a direction perpendicular to the feed component force
- Fy is a horizontal component force (feed component force) that works in the feed direction of the cutting tool
- Fz works in the axial direction of the cutting tool.
- Axial component force (back component force) is shown respectively.
- the main component force, feed component force, and back component force are component forces obtained by resolving the cutting resistance in the x-axis, y-axis, and z-axis directions orthogonal to each other.
- the average value of the main component force Fx was ⁇ 437N in the example, and ⁇ 279N in the comparative example.
- the average value of the feed component force Fy was ⁇ 718N in the example, whereas it was ⁇ 661N in the comparative example.
- the average value of the back component force Fz was ⁇ 355N in the example, whereas it was ⁇ 291N in the comparative example.
- the average values of the cutting force (N) were compared between the example and the comparative example, the average values of the back component force Fz and the back component force Fz were equivalent values.
- the average value of the main component force Fx of the example was 158 N smaller than the average value of the main component force Fx of the comparative example.
- the average value of the amplitude of the cutting force (N) is compared between the example and the comparative example, the average value of the amplitude of the main component force Fx of the example is larger than the average value of the amplitude of the main component force Fx of the comparative example. It was 224N smaller, and was about 55% of the average amplitude of the main component force Fx of the comparative example.
- the average value of the amplitude of the feed component force Fy of the example was 168N smaller than the average value of the amplitude of the feed component force Fy of the comparative example, and was about 62% of the average value of the amplitude of the feed component force Fy of the comparative example.
- the average value of the amplitude of the back component force Fz of the example was 93 N smaller than the average value of the amplitude of the back component force Fz of the comparative example, and was about 67% of the average value of the amplitude of the back component force Fz of the comparative example.
- the cutting tool 1 of the example has less vibration during cutting (the amplitude of the cutting resistance is smaller) than the cutting tool of the comparative example.
- the cutting head 2 and the main body portion 3 can be fastened with high precision compared to the comparative example, and resonance is suppressed by the first female screw portion 34 made of the second metal material.
- the female thread portion 33 includes the first female thread portion 34 made of the second metal material and the second female screw portion 35 made of the first metal material. It was confirmed that the vibration generated at the time of cutting was suppressed as compared with the comparative example in which the female thread portion was made of a single material.
- the cutting tool 1, the cutting head 2, and the main body 3 are each an example of the main body of the tip replacement cutting tool, the cutting head, and the tip replacement cutting tool of the present invention.
- the first female thread part 34, the second female thread part 35, and the female thread part 33 are examples of the first female thread part, the second female thread part, and the female thread part of the present invention.
- the female thread root 36 and the female thread peak 37 are examples of the female thread root and the female thread peak 37 of the present invention, respectively.
- the tip part 31 and the cylinder part 32 are examples of the tip part and the cylinder part of the present invention.
- the tapered portion and the male screw portion 24 are examples of the tapered portion and the male screw portion of the present invention.
- the male thread part 24 of the cutting head 2 is screwed into a female thread part 33 having a first female thread part 34 and a second female thread part 35. Maintaining the rigidity of the main body part 3 by using the first female thread part 34 as a metal material having a relatively low rigidity and the second female thread part 35 and the cylinder part 32 as a metal material having a relatively high rigidity; It is possible to reduce the possibility that the thread of the external thread part 24 or the internal thread part 33 that connects the main body part 3 and the cutting head 2 is lost due to an impact caused by vibration.
- the first metal material is an alloy having a density of 10 g / cm 3 or more
- the second metal material is a steel metal.
- the main body 3 of the cutting tool 1 can ensure the rigidity of the cylindrical portion 32 by configuring the cylindrical portion 32 with a first metal material having a density of 10 g / cm 3 or more.
- the first female thread portion 34 is made of a steel metal, so that the thread of the external thread portion 24 or the internal thread portion 33 that connects the main body portion 3 and the cutting head 2 is caused by vibration. The possibility of loss due to impact can be reduced.
- the thickness T ⁇ b> 1 in the radial direction of the cylinder part 32 is thicker than the thickness T ⁇ b> 2 in the direction of the female thread part 33. Therefore, the main body 3 of the cutting tool 1 can ensure the rigidity of the cylindrical portion 32 because the radial thickness T1 of the cylindrical portion 32 is thicker than the radial thickness T2 of the female screw portion 33.
- the tip of the cylindrical portion 32 and the internal thread portion 33 is made of a second metal material, is continuous with the external thread portion 24 of the cutting head 2, and has a smaller diameter toward the external thread portion 24 side.
- a cylindrical tip portion 31 that accommodates the tapered portion 23 is provided. Therefore, the main-body part 3 of the cutting tool 1 can accommodate the taper part 23 which continues with the external thread part 24 of the cutting head 2 by the front-end
- the male thread is in contact with both the first female thread 34 and the second female thread 35.
- a cutting head 2 having 24.
- the male thread portion 24 of the cutting head 2 abuts both the first female thread portion 34 and the second female thread portion 35. Therefore, the cutting tool 1 has the second female thread portion while the first female thread portion 34 reduces the impact caused by the vibration of the thread of the male thread portion or the female thread portion that connects the main body portion 3 and the cutting head 2. 35 can firmly fasten the cutting head 2 and the main body 3.
- the tip exchange type cutting tool and the main body of the present invention are not limited to the above-described embodiment, and various changes may be made without departing from the gist of the present invention. For example, the following modifications may be added as appropriate.
- the numerical values given in the above embodiment are examples, and other numerical values may be adopted.
- the cutting tool may be applied to a cutting tool such as an end mill, a drill, or a tap.
- a cutting tool such as an end mill, a drill, or a tap.
- the male screw may be threaded according to the cutting direction of the cutting head (in the direction in which the screw is tightened against the cutting resistance of the cutting head).
- At least one of the front end portion 31 and the bottom portion 39 of the main body 3 may be made of a first metal material.
- the second metal material may be different from the first metal material.
- the first metal material may not be an alloy having a density of 10 g / cm 3 or more.
- the second metal material may not be a steel metal.
- the thickness in the radial direction of the tube portion may not be thicker than the thickness in the radial direction of the female screw portion.
- the male thread portion of the cutting head may abut only with the first female thread portion when screwed into the female thread portion of the main body portion.
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Abstract
Description
図1に示すように、切削工具1は、マシニングセンタ等により回転駆動され、被削材の切削加工を行う切削工具である。より詳細には、切削工具1は、切削ヘッド2及び本体部3を備え、切削ヘッド2が本体部3に対して着脱可能な、先端交換式の切削工具である。切削ヘッド2は、タングステンカ―バイト等を加圧焼結した超硬合金から構成されている。切削ヘッド2は、軸方向先端側から後端側にかけて、刃部21、胴部22、テーパ部23及びおねじ部24をこの順で備える。刃部21は、被削材の切削加工を行うための部位であり、周知の外周刃、底刃、チップポケット、及びギャッシュ等を有する。胴部22及びテーパ部23は、刃部21とおねじ部24との間に配置される。胴部22の径は、テーパ部23の径よりも大きい。胴部22が備える面の内の、テーパ部23と連結する面25は、軸方向と略垂直な平面である。テーパ部23は、おねじ部24側ほど径が小さいテーパ状である。おねじ部24はテーパ部23の後端と連結し、外周におねじが螺刻されている。
図3を参照して、切削工具1の製造方法を説明する。図3に示すように、第一金属材料で構成された部材41と、第二金属材料で構成された部材42とを準備し、部材41に部材42を嵌合させる(嵌合工程)。部材41は、直径Dの円柱状の部材であり、先端側から後端側に向けて延びる軸線AXを中心とする約D2の凹部を有する。部材42は、先端側(図3の上側)が直径Dの円柱状であり、後端側に直径D2の円柱状の凸部を有する。部材42の凸部を部材41の凹部に嵌め、部材41と部材42とを接合する(接合工程)。部材41及び部材42の接合体に、ねじ切りフライス等を用いてめねじ部33を切削加工する(締結部形成工程)。以上で、めねじ部33を備える本体部3が製造される。
上記実施形態の切削工具1を実施例、おねじ部が第一金属材料のみで構成された切削工具を比較例とし、切削加工時における振動を評価する試験を行った。実施例では本体部3の第一金属材料を超硬合金とし、第二金属材料をクロムモリブデン鋼(JISで規定されるSCM440)とした。比較例は、本体部を超硬合金のみで構成した。実施例と比較例とでは、本体部のめねじ部の材料のみが異なり、他の構成は互いに同じである。
Claims (5)
- 先端交換式切削工具の本体部であって、
第一金属材料によって構成され、軸方向に延設された筒状の筒部と、
前記筒部の内周に設けられた、切削ヘッドのおねじ部と螺合可能なめねじ部であって、
前記めねじ部のめねじ谷底よりもめねじ山頂側、且つ前記めねじ部の有効径に対応する部分よりも前記めねじ谷底側の部分から、前記めねじ部の前記めねじ山頂までの部分である、前記第一金属材料とは異なる第二金属材料により構成される第一めねじ部と、
前記筒部の内周と連続する部分であって、前記めねじ部の前記第一めねじ部以外の部分である、前記第一金属材料により構成される第二めねじ部と
を有するめねじ部と
を備えることを特徴とする先端交換式切削工具の本体部。 - 前記第一金属材料は、密度が10g/cm3以上の合金であり、
前記第二金属材料は、鋼系金属であることを特徴とする請求項1に記載の先端交換式切削工具の本体部。 - 前記筒部の径方向の厚みは、前記めねじ部の前記径方向の厚みよりも厚いことを特徴とする請求項1又は2に記載の先端交換式切削工具の本体部。
- 前記筒部及び前記めねじ部の先端に、前記第二金属材料で構成され、前記切削ヘッドの前記おねじ部と連続し、前記おねじ部側ほど径が小さいテーパ部を収容する筒状の先端部を更に備えたことを特徴とする請求項1から3の何れかに記載の先端交換式切削工具の本体部。
- 請求項1から4の何れかに記載の先端交換式切削工具の本体部と、
前記本体部のめねじ部に螺合した場合、前記第一めねじ部と前記第二めねじ部との双方と当接するおねじ部を有する切削ヘッドと
を備えることを特徴とする先端交換式切削工具。
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DE112016007405.0T DE112016007405T5 (de) | 2016-11-01 | 2016-11-01 | Hauptkörper eines schneidwerkzeugs mit austauschbarer spitze und schneidwerkzeug mit austauschbarer spitze |
US16/096,383 US10814408B2 (en) | 2016-11-01 | 2016-11-01 | Replaceable-tip cutting tool main body and replaceable-tip cutting tool |
CN201680090124.0A CN109862982B (zh) | 2016-11-01 | 2016-11-01 | 顶端可更换式切削工具的主体部和顶端可更换式切削工具 |
PCT/JP2016/082494 WO2018083743A1 (ja) | 2016-11-01 | 2016-11-01 | 先端交換式切削工具の本体部及び先端交換式切削工具 |
KR1020197000740A KR102189450B1 (ko) | 2016-11-01 | 2016-11-01 | 선단 교환식 절삭 공구의 본체부 및 선단 교환식 절삭 공구 |
JP2017522990A JP6371005B1 (ja) | 2016-11-01 | 2016-11-01 | 先端交換式切削工具の本体部及び先端交換式切削工具 |
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US11426803B2 (en) | 2020-09-08 | 2022-08-30 | Iscar, Ltd. | Replaceable cutting head having external thread with concavely curved root and rotary cutting tool |
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JP6371005B1 (ja) | 2018-08-08 |
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KR102189450B1 (ko) | 2020-12-11 |
DE112016007405T5 (de) | 2019-07-18 |
JPWO2018083743A1 (ja) | 2018-11-08 |
US10814408B2 (en) | 2020-10-27 |
CN109862982A (zh) | 2019-06-07 |
CN109862982B (zh) | 2020-09-04 |
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