JP6365245B2 - Thermoplastic resin cutting equipment - Google Patents

Thermoplastic resin cutting equipment Download PDF

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JP6365245B2
JP6365245B2 JP2014224664A JP2014224664A JP6365245B2 JP 6365245 B2 JP6365245 B2 JP 6365245B2 JP 2014224664 A JP2014224664 A JP 2014224664A JP 2014224664 A JP2014224664 A JP 2014224664A JP 6365245 B2 JP6365245 B2 JP 6365245B2
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work material
cutting
air
suction port
hood
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JP2016087738A (en
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拓紀 村尾
拓紀 村尾
豊和 廣田
豊和 廣田
清野　誉晃
誉晃 清野
大輔 平岡
大輔 平岡
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Toyota Motor Corp
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Description

本発明は、熱可塑性樹脂の切削加工装置に関する。   The present invention relates to a thermoplastic resin cutting apparatus.

従来から、補強繊維とマトリックス樹脂を含む繊維強化複合材の穴あけに用いる回転切削式の穴あけ工具が知られている（例えば、下記特許文献１を参照）。特許文献１に記載された穴あけ工具は、本体部の先端に回転中心から外周に至る回転中心対称の切れ刃を有している。また、特許文献１には、発生する切屑を切屑吸引手段で強制的に除去しながら加工を進める穴あけ方法が例示されている。   Conventionally, a rotary cutting type drilling tool used for drilling a fiber reinforced composite material including reinforcing fibers and a matrix resin is known (for example, see Patent Document 1 below). The drilling tool described in Patent Document 1 has a cutting edge symmetrical to the rotation center from the rotation center to the outer periphery at the tip of the main body. Further, Patent Document 1 exemplifies a drilling method in which processing is performed while forcibly removing generated chips with a chip suction means.

例えば、特許文献１の図３を参照すると、マシニングセンタの主軸に、工具ホルダを介して穴あけ工具が装着され、加工部を覆うカバーが取り付けられている。切屑吸引手段は、吸引装置とカバーとその両者間を接続するホースとからなる。   For example, referring to FIG. 3 of Patent Document 1, a drilling tool is attached to a spindle of a machining center via a tool holder, and a cover that covers a machining portion is attached. The chip suction means includes a suction device, a cover, and a hose connecting the two.

カバーは、マシニングセンタに取り付ける固定カバーの下部に軸方向相対スライドが可能な筒状の可動カバーを有している。可動カバーは、工具に先行して被削材の上面に押し当てられ、この状態で主軸がさらに降下して穴あけ工具による穴あけがなされる。したがって、加工中は、常時、加工部がカバーに囲われ、発生した切屑が強制的に吸引除去されることになる。   The cover has a cylindrical movable cover capable of axial relative sliding at a lower portion of a fixed cover attached to the machining center. The movable cover is pressed against the upper surface of the work material prior to the tool, and in this state, the spindle is further lowered and drilling is performed by the drilling tool. Therefore, during machining, the machining part is always surrounded by the cover, and the generated chips are forcibly removed by suction.

特開２０１２−２２３８８２号公報JP 2012-223882 A

特許文献１では、穴あけ工具の周囲の全体が可動カバーに覆われている。そのため、可動カバーと被削材との間の隙間から吸い込まれた空気は、可動カバーの内周面に沿って穴あけ工具の軸方向に吸引される。この場合、可動カバーの内周面近傍に飛散した切粉を穴あけ工具の軸方向に沿って効率よく吸引することができる。しかし、穴あけ工具の近傍では、十分な空気流を発生させることができず、穴あけ工具と熱可塑性樹との間の摩擦熱によって高温になった切粉が溶融し、バリが発生する虞がある。   In Patent Document 1, the entire periphery of the drilling tool is covered with a movable cover. Therefore, the air sucked from the gap between the movable cover and the work material is sucked in the axial direction of the drilling tool along the inner peripheral surface of the movable cover. In this case, the chips scattered near the inner peripheral surface of the movable cover can be efficiently sucked along the axial direction of the drilling tool. However, in the vicinity of the drilling tool, it is not possible to generate a sufficient air flow, and there is a risk that burrs will be generated due to melting of high-temperature chips due to frictional heat between the drilling tool and the thermoplastic tree. .

本発明は、前記課題に鑑みてなされたものであり、熱可塑性樹脂の切削加工で発生する切粉の冷却効率を高め、バリの発生を抑制することができる熱可塑性樹脂の切削加工装置を提供することを目的とする。   The present invention has been made in view of the above problems, and provides a thermoplastic resin cutting device capable of increasing the cooling efficiency of chips generated by cutting a thermoplastic resin and suppressing the generation of burrs. The purpose is to do.

前記目的を達成すべく、本発明の切削加工装置は、熱可塑性樹脂からなる被削材を切削する切削工具と、前記被削材から発生する切粉を空気とともに吸引する集塵機とを備えた熱可塑性樹脂の切削加工装置であって、前記集塵機の吸引口に、前記被削材の被削面を覆うとともに該被削面に沿う一方向が開放されたフードを備え、前記切削工具は、前記吸引口に対して前記一方向に偏って配置され、前記空気は、前記一方向において前記切削工具の上流側から下流側へ流れて前記吸引口に吸引されることを特徴とする。   In order to achieve the above object, a cutting apparatus according to the present invention includes a cutting tool that cuts a work material made of thermoplastic resin, and a heat collector that includes a dust collector that sucks together with air the chips generated from the work material. A plastic resin cutting apparatus comprising: a hood that covers a work surface of the work material and is open in one direction along the work surface at a suction port of the dust collector; The air is arranged to be biased in the one direction, and the air flows from the upstream side to the downstream side of the cutting tool in the one direction and is sucked into the suction port.

本発明の切削加工装置によって熱可塑性樹脂からなる被削材を切削する際には、被削材の被削部から発生する切粉を、例えば、以下の手順で回収することができる。まず、切削工具を被削材の被削部の位置に移動させ、集塵機の吸引口に設けられたフードを被削材の被削面の一部を覆うように配置し、集塵機を作動させる。これにより、集塵機によって吸引口から空気が吸引され、被削材の被削面に沿う一方向が開放されたフードに空気が取り込まれ、被削材の被削面に沿う一方向に大流量の空気流が発生する。   When cutting a workpiece made of thermoplastic resin by the cutting apparatus of the present invention, chips generated from the cut portion of the workpiece can be collected, for example, by the following procedure. First, the cutting tool is moved to the position of the cut portion of the work material, a hood provided at the suction port of the dust collector is disposed so as to cover a part of the work surface of the work material, and the dust collector is operated. As a result, air is sucked from the suction port by the dust collector, air is taken into the hood opened in one direction along the work surface of the work material, and a large flow rate of air flow in one direction along the work surface of the work material Will occur.

次に、被削材の被削部を、切削工具によって切削する。被削材の切削加工では、切削工具と被削材との間の摩擦によって摩擦熱が発生する。前記特許文献１に記載されたマシニングセンタでは、穴あけ工具の周囲３６０°を覆う可動カバーと被削材との間の隙間から空気を取り入れ、被削材から発生した切粉を可動カバーの内周面に沿って穴あけ工具の軸方向に吸引している。この場合、穴あけ工具の近傍では、被削材の被削面に沿う空気流を発生させることは困難である。そのため、切削加工で発生する熱によって、穴あけ工具の近傍で高温になった切粉が溶融し、加工穴の周囲に堆積してバリが発生する虞がある。   Next, the cut portion of the work material is cut with a cutting tool. In cutting a work material, frictional heat is generated by friction between the cutting tool and the work material. In the machining center described in Patent Document 1, air is introduced from a gap between the movable cover covering 360 ° around the drilling tool and the work material, and chips generated from the work material are removed from the inner peripheral surface of the movable cover. Is sucked in the axial direction of the drilling tool. In this case, it is difficult to generate an air flow along the work surface of the work material in the vicinity of the drilling tool. For this reason, the chips generated at the high temperature in the vicinity of the drilling tool are melted by the heat generated in the cutting process, and may accumulate on the periphery of the processed hole to generate burrs.

これに対し、本発明の切削加工装置では、集塵機の吸引口に、被削材の被削面を覆うとともに該被削面に沿う一方向が開放されたフードを備え、切削工具は、吸引口に対して前記一方向に偏って配置されている。そのため、集塵機を作動させることで、空気は、前記一方向において切削工具の上流側から下流側へ流れて吸引口に吸引される。すなわち、切削工具の上流側から下流側へ向けて流れる空気に指向性を与え、被削材の被削面に沿う一方向に大流量の空気流を発生させることができる。したがって、切削工具及び被削材の被削部は、切削工具の上流側から下流側へ流れる一方向の強い空気流によって急激に冷却され、切削加工によって被削材の被削部から発生した切粉が、溶融することなく空気とともに集塵機によって吸引される。   On the other hand, in the cutting device of the present invention, the suction port of the dust collector is provided with a hood that covers the work surface of the work material and is open in one direction along the work surface. And arranged in the one direction. Therefore, by operating the dust collector, air flows from the upstream side to the downstream side of the cutting tool in the one direction and is sucked into the suction port. That is, directivity can be given to the air flowing from the upstream side to the downstream side of the cutting tool, and a large flow of airflow can be generated in one direction along the cut surface of the work material. Therefore, the cut portion of the cutting tool and the work material is rapidly cooled by a strong air flow in one direction flowing from the upstream side to the downstream side of the cutting tool, and the cutting generated from the cut portion of the work material by the cutting process. The powder is sucked by the dust collector together with the air without melting.

以上の説明から理解できるように、本発明によれば、熱可塑性樹脂の切削加工で発生する切粉の冷却効率を高め、バリの発生を抑制することができる熱可塑性樹脂の切削加工装置を提供することができる。   As can be understood from the above description, according to the present invention, there is provided a thermoplastic resin cutting device capable of increasing the cooling efficiency of chips generated by cutting a thermoplastic resin and suppressing the generation of burrs. can do.

本発明の切削加工装置の一実施形態を示す模式断面図。The schematic cross section which shows one Embodiment of the cutting device of this invention. 図１に示す切削加工装置のII−II線に沿う矢視断面図。FIG. 2 is a cross-sectional view taken along the line II-II of the cutting apparatus shown in FIG. 1.

以下、図面を参照して本発明の切削加工装置の一実施形態について詳細に説明する。   Hereinafter, an embodiment of a cutting apparatus of the present invention will be described in detail with reference to the drawings.

図１は、本発明の切削加工装置の一実施形態を示す模式断面図である。図２は、図１に示す切削加工装置のII−II線に沿う矢視断面図である。   FIG. 1 is a schematic cross-sectional view showing an embodiment of a cutting apparatus of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II of the cutting apparatus shown in FIG.

本実施形態の切削加工装置１は、熱可塑性樹脂からなる被削材Ｗを切削する切削工具１１と、被削材Ｗから発生する切粉Ｃを空気Ａとともに吸引する集塵機１５と、を備えた熱可塑性樹脂の切削加工装置である。本実施形態の切削加工装置１は、集塵機１５の吸引口１４ａに、被削材Ｗの被削面Ｗｆを覆うとともに被削面Ｗｆに沿う一方向Ｄが開放されたフード１３を備えること、及び、切削工具１１は、吸引口１４ａに対して一方向Ｄに偏って配置されることを特徴としている。被削材Ｗとしては、例えば、熱可塑ＣＦＲＰ複合材等の繊維強化された熱可塑性樹脂、又は、繊維強化されていない通常の熱可塑性樹脂を用いることができる。   The cutting device 1 according to the present embodiment includes a cutting tool 11 that cuts a work material W made of a thermoplastic resin, and a dust collector 15 that sucks together with air A the chips C generated from the work material W. This is a thermoplastic resin cutting device. The cutting apparatus 1 according to the present embodiment includes a hood 13 that covers the work surface Wf of the work material W and is open in one direction D along the work surface Wf at the suction port 14a of the dust collector 15; The tool 11 is characterized in that the tool 11 is arranged in a direction D with respect to the suction port 14a. As the work material W, for example, a thermoplastic resin reinforced with fibers such as a thermoplastic CFRP composite, or a normal thermoplastic resin not reinforced with fibers can be used.

本実施形態の切削工具１１は、例えば、熱可塑性樹脂からなる被削材Ｗに切削穿孔加工を施すドリルである。切削工具１１はドリルに限定されず、例えば、バイト、フライス、エンドミル等、他の切削工具を用いることもできる。切削工具１１は、例えば、加工機１２のチャックに保持されて、加工機１２に固定されている。加工機１２は、例えば、モータや変速機等を備え、切削工具１１を回転させて被削材Ｗの切削を行う。加工機１２は、例えば、フード１３の一部に取り付けることができる。   The cutting tool 11 of the present embodiment is a drill that performs cutting and drilling on a work material W made of a thermoplastic resin, for example. The cutting tool 11 is not limited to a drill, and other cutting tools such as a cutting tool, a milling cutter, and an end mill can be used. For example, the cutting tool 11 is held by a chuck of the processing machine 12 and is fixed to the processing machine 12. The processing machine 12 includes, for example, a motor, a transmission, and the like, and rotates the cutting tool 11 to cut the work material W. The processing machine 12 can be attached to a part of the hood 13, for example.

フード１３は、側壁１３ｃと天板１３ｄとを有し、被削材Ｗに接する底部が開放されるとともに、被削材Ｗに沿う一方向Ｄの片側で側壁１３ｃが開放されて空気入口１３ａが形成された矩形箱型の部材である。天板１３ｄは、側壁１３ｃの上端に連結され、フード１３を被削材Ｗに沿って配置したときに、被削材Ｗに対向する。天板１３ｄには、被削材Ｗに対向する空気出口１３ｂが形成されている。   The hood 13 includes a side wall 13c and a top plate 13d, and a bottom portion in contact with the work material W is opened, and the side wall 13c is opened on one side in one direction D along the work material W, so that an air inlet 13a is formed. It is a formed rectangular box-shaped member. The top plate 13d is connected to the upper end of the side wall 13c, and faces the work material W when the hood 13 is disposed along the work material W. An air outlet 13b facing the work material W is formed in the top plate 13d.

すなわち、フード１３は、被削材Ｗに沿う一方向Ｄにおいて切削工具１１と対向する空気入口１３ａと、該空気入口１３ａから一方向Ｄに沿って離れた位置で集塵機１５の吸引口１４ａに接続されて被削材Ｗに対向する空気出口１３ｂと、該空気出口１３ｂから空気入口１３ａに向かう一方向Ｄを除いて空気出口１３ｂを囲む側壁１３ｃと、を有している。なお、フード１３の側壁１３ｃは、被削材Ｗに沿う一方向Ｄを除いて、切削工具１１の周囲を囲んでもよい。   That is, the hood 13 is connected to the air inlet 13a facing the cutting tool 11 in one direction D along the work material W and to the suction port 14a of the dust collector 15 at a position away from the air inlet 13a along the one direction D. And an air outlet 13b facing the work material W, and a side wall 13c surrounding the air outlet 13b except for the one direction D from the air outlet 13b toward the air inlet 13a. The side wall 13c of the hood 13 may surround the cutting tool 11 except for the one direction D along the work material W.

また、図２に示すように、フード１３は、側壁１３ｃに貫通孔１３ｅを有していてもよい。本実施形態のフード１３では、被削材Ｗに沿う一方向Ｄにおいて、空気出口１３ｂを挟んで切削工具１１と対向する側壁１３ｃに貫通孔１３ｅが形成されている。本実施形態の貫通孔１３ｅは、空気入口１３ａの開口面に垂直な中心線ＣＬから側方にずれた位置に形成されている。   Moreover, as shown in FIG. 2, the hood 13 may have a through hole 13e in the side wall 13c. In the hood 13 of this embodiment, in one direction D along the work material W, a through hole 13e is formed in a side wall 13c facing the cutting tool 11 with the air outlet 13b interposed therebetween. The through hole 13e of this embodiment is formed at a position shifted laterally from the center line CL perpendicular to the opening surface of the air inlet 13a.

集塵機１５は、例えば、集塵ダクト１４を備え、集塵ダクト１４の先端に吸引口１４ａが設けられている。集塵機１５の吸引口１４ａは、フード１３の空気出口１３ｂに接続さている。集塵機１５の内部には、例えば、空気ファン１６が配置されている。集塵機１５は、空気ファン１６を回転させることで負圧を生じさせ、フード１３の空気出口１３ｂに接続された吸引口１４ａから、集塵ダクト１４を介して空気Ａとともに被削材Ｗの切削時に発生する切粉Ｃを吸引する。集塵機１５の空気ファン１６の下流側には、排気ダクト１７が連結されている。集塵機１５は、集塵ダクト１４の先端の吸引口１４ａを介して吸引した切粉Ｃを、空気Ａとともに排気ダクト１７を介して外部の集塵容器等に送出する。   The dust collector 15 includes, for example, a dust collection duct 14, and a suction port 14 a is provided at the tip of the dust collection duct 14. The suction port 14 a of the dust collector 15 is connected to the air outlet 13 b of the hood 13. For example, an air fan 16 is disposed inside the dust collector 15. The dust collector 15 generates a negative pressure by rotating the air fan 16, and cuts the work material W together with the air A from the suction port 14 a connected to the air outlet 13 b of the hood 13 through the dust collection duct 14. The generated chips C are sucked. An exhaust duct 17 is connected to the downstream side of the air fan 16 of the dust collector 15. The dust collector 15 sends the chips C sucked through the suction port 14 a at the tip of the dust collecting duct 14 to an external dust collecting container or the like through the exhaust duct 17 together with the air A.

以下、本実施形態の切削加工装置１の作用について説明する。   Hereinafter, the operation of the cutting apparatus 1 of the present embodiment will be described.

本実施形態の切削加工装置１によって被削材Ｗを切削する際には、被削材Ｗの被削部から発生する切粉Ｃを、例えば、以下の手順で回収することができる。まず、切削工具１１を被削材Ｗの被削部の位置に移動させ、集塵機１５の吸引口１４ａに設けられたフード１３を、被削材Ｗの被削面Ｗｆの少なくとも一部を覆うように被削材Ｗに沿って配置し、集塵機１５を作動させる。これにより、集塵機１５の吸引口１４ａから空気Ａが吸引され、吸引口１４ａに設けられたフード１３の空気入口１３ａから空気Ａが取り込まれる。   When cutting the work material W by the cutting apparatus 1 of the present embodiment, the chips C generated from the work portion of the work material W can be collected, for example, by the following procedure. First, the cutting tool 11 is moved to the position of the cut portion of the work material W, and the hood 13 provided in the suction port 14a of the dust collector 15 is covered with at least a part of the work surface Wf of the work material W. It arrange | positions along the workpiece W and the dust collector 15 is operated. Thereby, the air A is sucked from the suction port 14a of the dust collector 15, and the air A is taken in from the air inlet 13a of the hood 13 provided in the suction port 14a.

ここで、フード１３は、空気入口１３ａによって被削材Ｗの被削面Ｗｆに沿う一方向Ｄの片側が開放され、その一方向Ｄを除いて側壁１３ｃ及び天板１３ｄによって吸引口１４ａを覆っている。また、切削工具１１は、吸引口１４ａに対して、フード１３の側壁１３ｃが開放された一方向Ｄに離れた位置に偏って配置されている。そのため、空気Ａは、フード１３の側壁１３ｃが開放された一方向Ｄ、すなわち被削材Ｗの被削面Ｗｆに沿う一方向Ｄに、切削工具１１の上流側から下流側へ流れて吸引口１４ａに吸引される。すなわち、切削工具１１の上流側から下流側へ、被削材Ｗの被削面Ｗｆに沿う一方向Ｄに、指向性を有する大流量の空気Ａの流れが生成される。   Here, the hood 13 is opened at one side in one direction D along the work surface Wf of the work material W by the air inlet 13a, and covers the suction port 14a by the side wall 13c and the top plate 13d except for the one direction D. Yes. Moreover, the cutting tool 11 is biased and arranged at a position away from the suction port 14a in one direction D in which the side wall 13c of the hood 13 is opened. Therefore, the air A flows from the upstream side to the downstream side of the cutting tool 11 in one direction D in which the side wall 13c of the hood 13 is opened, that is, one direction D along the work surface Wf of the work material W, and the suction port 14a. Sucked into. That is, a large flow of air A having directivity is generated in one direction D along the work surface Wf of the work material W from the upstream side to the downstream side of the cutting tool 11.

次に、被削材Ｗの被削部を、切削工具１１によって切削する。被削材Ｗの切削加工では、切削工具１１と被削材Ｗとの間の摩擦によって摩擦熱が発生する。そのため、前記特許文献１に記載されているように、穴あけ工具の周囲の可動カバーと被削材との間の隙間から空気を取り入れ、被削材の切削加工で発生した切粉を穴あけ工具の軸方向に吸引するだけでは、穴あけ工具の近傍に強い空気流を発生させることは困難である。したがって、前記特許文献１に記載の穴あけ方法では、切削加工で発生する熱を空気流によって十分に奪うことはできず、穴あけ工具の近傍で高温になった切粉が溶融し、被削材の表裏の加工穴の周囲に堆積してバリが発生する虞がある。被削材の加工穴の周囲にバリが発生すると、機械加工後に手仕上げによるバリ除去が必要になり、工数が増加するなど、後工程に悪影響を及ぼす。   Next, the cut portion of the work material W is cut with the cutting tool 11. In the cutting of the work material W, frictional heat is generated by friction between the cutting tool 11 and the work material W. Therefore, as described in Patent Document 1, air is taken in from the gap between the movable cover around the drilling tool and the work material, and chips generated by the cutting of the work material are removed from the drilling tool. It is difficult to generate a strong air flow in the vicinity of the drilling tool only by sucking in the axial direction. Therefore, in the drilling method described in Patent Document 1, the heat generated in the cutting process cannot be taken away sufficiently by the air flow, and the chips that have become high in the vicinity of the drilling tool melt, There is a possibility that burrs may be generated around the processing holes on the front and back sides. If burrs are generated around the work hole of the work material, it is necessary to remove burrs by hand finishing after machining, which adversely affects subsequent processes such as increasing the number of man-hours.

これに対し、本実施形態の切削加工装置１では、前述のように、集塵機１５の吸引口１４ａに、被削材Ｗの被削面Ｗｆを覆うとともに被削面Ｗｆに沿う一方向Ｄが開放されたフード１３を備え、切削工具１１は、吸引口１４ａに対して一方向Ｄに偏って配置されている。そのため、集塵機１５を作動させることで、空気Ａは、被削面Ｗｆに沿う一方向Ｄにおいて、切削工具１１の上流側から下流側へ流れて吸引口１４ａに吸引される。これにより、被削材Ｗの表面に沿う一方向Ｄに指向性が付与され、切削工具１１の上流側から下流側へ流れる大流量の空気Ａの流れを発生させることができる。   On the other hand, in the cutting device 1 of the present embodiment, as described above, the suction port 14a of the dust collector 15 covers the work surface Wf of the work material W and the one direction D along the work surface Wf is opened. The hood 13 is provided, and the cutting tool 11 is arranged so as to be biased in one direction D with respect to the suction port 14a. Therefore, by operating the dust collector 15, the air A flows from the upstream side to the downstream side of the cutting tool 11 in the one direction D along the work surface Wf and is sucked into the suction port 14a. Thereby, directivity is given to one direction D along the surface of the work material W, and a flow of a large flow rate of air A flowing from the upstream side to the downstream side of the cutting tool 11 can be generated.

そのため、切削工具１１及び被削材Ｗの被削部は、切削工具１１の上流側から下流側へ一方向Ｄに流れる大流量の空気Ａによって急激に冷却され、切削加工によって被削材Ｗの被削部から発生した切粉Ｃが、溶融することなく空気Ａとともに集塵機１５によって吸引される。したがって、本実施形態の切削加工装置１によれば、熱可塑性樹脂からなる被削材Ｗの切削加工で発生する切粉Ｃの冷却効率を高め、バリの発生を抑制することができる。   Therefore, the cutting tool 11 and the work portion of the work material W are rapidly cooled by a large flow of air A flowing in one direction D from the upstream side to the downstream side of the cutting tool 11, and the work material W is cut by cutting. The chips C generated from the cut portion are sucked by the dust collector 15 together with the air A without melting. Therefore, according to the cutting apparatus 1 of the present embodiment, it is possible to increase the cooling efficiency of the chips C generated by the cutting of the work material W made of thermoplastic resin, and to suppress the generation of burrs.

すなわち、空冷によって切削工具１１を冷却し、切削工具１１及び被削材Ｗの温度を熱可塑性樹脂の融点以下にすることで、バリの発生を低減することができる。これにより、後工程の負担を軽減し、後工程作業の工数を削減することができる。また、切削加工装置１において、集塵と冷却を同時に行うことができ、設備費を低減することができる。また、周辺環境への粉塵の飛散を防止することができる。また、切削工具１１等の加工治具が冷却されることで、加工治具の寿命を延長することができる。   That is, the generation of burrs can be reduced by cooling the cutting tool 11 by air cooling and setting the temperature of the cutting tool 11 and the work material W to be equal to or lower than the melting point of the thermoplastic resin. Thereby, the burden of a post process can be reduced and the man-hour of a post process work can be reduced. Moreover, in the cutting apparatus 1, dust collection and cooling can be performed simultaneously, and equipment costs can be reduced. In addition, scattering of dust to the surrounding environment can be prevented. In addition, the life of the processing jig can be extended by cooling the processing jig such as the cutting tool 11.

また、本実施形態のフード１３は、側壁１３ｃに貫通孔１３ｅが形成されている。これにより、フード１３内で渦流を生じさせ、被削材Ｗに沿う一方向Ｄにおいて空気出口１３ｂへ向かって流れる指向性を有する空気流の流量を増大させ、被削材Ｗの切削加工で発生する切粉Ｃの冷却効率を高めることができる。   In the hood 13 of the present embodiment, a through hole 13e is formed in the side wall 13c. As a result, a vortex flow is generated in the hood 13, and the flow rate of the directional airflow that flows toward the air outlet 13 b in the one direction D along the work material W is increased, and is generated by the cutting of the work material W. It is possible to increase the cooling efficiency of the chips C to be performed.

以上、図面を用いて本発明の実施の形態を詳述してきたが、具体的な構成はこの実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲における設計変更等があっても、それらは本発明に含まれるものである。   The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

１ 切削加工装置、１１ 切削工具、１３ フード、１４ａ 吸引口、１５ 集塵機、Ａ 空気、Ｃ 切粉、Ｄ 一方向、Ｗ 被削材、Ｗｆ 被削面 DESCRIPTION OF SYMBOLS 1 Cutting device, 11 Cutting tool, 13 Hood, 14a Suction port, 15 Dust collector, A Air, C Chip, D Unidirectional, W Work material, Wf Work surface

Claims (1)

熱可塑性樹脂からなる被削材を切削する切削工具と、前記被削材から発生する切粉を空気とともに吸引する集塵機とを備えた熱可塑性樹脂の切削加工装置であって、
前記集塵機の吸引口に、前記被削材の被削面を覆う天板と側壁を有するとともに該被削面に沿う一方向の片側で前記側壁が開放されて空気入口が形成されたフードを備え、
前記切削工具は、前記吸引口に対して前記一方向に偏って配置され、
前記吸引口は、前記フードの前記天板に形成された空気出口に接続され、
前記フードは、前記一方向における前記空気入口と反対側の前記側壁に貫通孔を有し、該貫通孔は前記空気入口の開口面に垂直な中心線から側方にずれた位置に形成され、
前記空気は、前記一方向において前記切削工具の上流側から下流側へ流れて前記吸引口に吸引されることを特徴とする熱可塑性樹脂の切削加工装置。 A thermoplastic resin cutting device comprising a cutting tool for cutting a work material made of a thermoplastic resin, and a dust collector for sucking together with air the chips generated from the work material,
The suction port of the dust collector comprises a hood having a top plate and a side wall covering the work surface of the work material and having an air inlet formed by opening the side wall in one direction along the work surface,
The cutting tool is arranged to be biased in the one direction with respect to the suction port,
The suction port is connected to an air outlet formed in the top plate of the hood,
The hood has a through hole in the side wall opposite to the air inlet in the one direction, and the through hole is formed at a position shifted laterally from a center line perpendicular to the opening surface of the air inlet,
The thermoplastic resin cutting apparatus according to claim 1, wherein the air flows from the upstream side to the downstream side of the cutting tool in the one direction and is sucked into the suction port.
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