JP3739834B2 - Product material shape and processing method - Google Patents

Product material shape and processing method Download PDF

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Publication number
JP3739834B2
JP3739834B2 JP16309295A JP16309295A JP3739834B2 JP 3739834 B2 JP3739834 B2 JP 3739834B2 JP 16309295 A JP16309295 A JP 16309295A JP 16309295 A JP16309295 A JP 16309295A JP 3739834 B2 JP3739834 B2 JP 3739834B2
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cutting
groove
shape
hole
product
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JPH08336709A (en
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宏 杉田
幸茂 土本
弘吉 河内
彰吾 中村
勲 山本
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Description

【０００１】
【産業上の利用分野】
本発明は製品にベアリング等を挿入する内径をボーリング加工する製品の内周面および中空の底面に、溝または窪みを設けたアルミダイキャスト製品ＦＣ，ＦＣＤ等の鋳物製品、樹脂成形品等の素材形状および同素材形状の加工方法に関するものである。
【０００２】
【従来の技術】
従来例を図８〜９によって説明する。図８は従来例の加工方法を説明する断面図、図９は図８に対応する側面図である。
アルミダイキャスト等製品で機械加工を要する円筒状孔部に、切削代を設けて成形された製品の素材を切削加工する一般的な加工方法の従来技術として、被切削物を回転させカッタ工具で切削するか固定された被切削物を回転するカッタ工具で切削する方法が取入れられており、該切削加工過程において発生する切り屑は帯状若しくは螺旋状で連続的に刃先より送りだされる。
【０００３】
また、切り屑を切断し断続的に送りだす方法として既に公開提供されている一例の公開特許昭５５−０４２７４６について説明する。
従来技術の切欠き部を持たない切削加工前の金属被削材を図８，９に示すような被削材１１において、内径切削を行う場合、被削材１１の素材内径Ｄ0 、切削仕上げ内径Ｄ1 ，Ｄ2 、切削切屑切断のための溝加工用カッタ１５の外径ｄ0 とすると、被削材１１を適宜の手段で固定し、カッタ１５を回転してＤ1 ，Ｄ2 の仕上がり径に対する溝Ｇはカッタ１５の外径ｄ0 の中心位置を被削材１１の半径方向に移動せしめ、切削後の仕上げ内面のそれぞれに僅かに痕跡が残るか残らないかの程度に加工するだけで素材内面に半月状に形成され、切削加工時の切り屑をこの溝により短く切断して断続的に発生させることができる。
【０００４】
【発明が解決しようとする課題】
従来技術の円筒孔を切削加工する過程で、刃先から連続的に発生する帯状若しくは螺旋状の切り屑が、被切削物や工具に巻きつくことによって、工具の刃先を損傷し内径仕上げ面に傷を発生させたり工具欠損による寸度不良を発生させて品質を低下させる上に、被切削物や工具に巻きついた切り屑を除去するために加工ラインの停止・除去作業により、工具の寿命・製品品質・作業効率が低下する等の問題がある。
【０００５】
なお、これらの不具合を除去するための切削切屑切断のための溝を設けて、刃先から発生する切り屑を断続的にする手段は、被切削材の円筒孔の内面に、改めて機械加工による溝加工であり、そのために被切削材の固定・芯だし、工具の交換等に多くの労力と時間を要するために、コストアップとなる問題がある。
また、円筒孔の仕上げ内面に溝の痕跡が残ることによって、該円筒孔に嵌入するベアリング等の縮合力が低下し品質の低下する問題がある。
【０００６】
本発明の目的は、前記問題を解決し素材の円筒状孔をボーリングする過程で発生する切り屑が断片的に放出される素材の形状及び加工方法を提供するにある。
【０００７】
【課題を解決するための手段】
第１発明の製品素材形状は、円筒状に機械加工を要する孔部の形状を製品の素材成形段階において、円筒内周部に切削代（Ｔ３）の二分の一程度の深さ（Ｔ１）を有する凹溝（１ｂ）と凸部（１ａ）を円周方向に交互に複数個設けるとともに、中空孔を有する底部に切削代の二分の一程度の深さを有する凹溝（１ｈ）と凸部（１ｇ）を螺旋状に交互に複数個設け、さらに、前記底部を切削加工するために回転するバイトの刃先面が断続する前記凸部の上面に連続して当接するように凹溝（１ｈ）と凸部（１ｇ）を設け、前記底部に設けた凸部と凹溝間の側面を僅かな傾斜をもった側面で形成した素材をもって、断続的な切り屑のボーリング加工を可能としたことを特徴とする。
【０００８】
第２発明の製品素材形状は、円筒状に機械加工を要する孔部の形状を製品の素材成形段階において、円筒内周部に切削代（Ｔ ３ ）の二分の一程度の深さ（Ｔ １ ）を有する凹溝（１ｂ）と凸部（１ａ）を円周方向に交互に複数個設けるとともに、中空孔を有する底部に切削代の二分の一程度の深さを有する半円状の窪み（１ｌ）（１ｍ）を複数個設け、さらに、前記底部を切削加工するために回転するバイトの刃先面の当接する面幅が狭くなる部分で切り屑が断続するように前記半円状の窪み（１ｌ）（１ｍ）を前記底部の内外周に複数個交互に設け、底面（１ｋ）と半円状の窪み（１ｌ，１ｍ）間は傾斜をもった面でつながれた形状で形成した素材をもって、断続的な切り屑のボーリング加工を可能としたことを特徴としている。
【０００９】
第３発明の製品素材形状加工方法は、請求項１若しくは２記載の製品素材の加工方法であって、前記溝または窪みを成形型で製造して前記製品素材の形状とする成形鋳造工程と、同素材の円筒状孔部をボーリング加工する際、前記溝又は窪みにより切削屑を断続的に生成する切削加工工程とからなることを特徴としている。
【００１２】
【作用】
円筒状孔の内周軸方向および底面に溝部を設けて形成された製品の素材をボーリング加工機のベースに固定し、回転部に装着された工具の回転下降によって、素材の内径は切削されるがその際、発生する切り屑は、溝の有無箇所によって厚みが相違することにより工具の抵抗を受けて、亀裂を生じて連続排出される過程で溝部の凹凸連結箇所の厚みが相違する部分において切断されて、断続的な切り屑として工具の回転により外部に排出される。
また、中空孔を有する底面はカッタの下刃面の回転により断続した切り屑となり、円筒部と同様に外部に排出されることによって、底面を持った円筒孔の加工は問題なく完了する。
【００１３】
【実施例】
本発明に係る第１実施例を図１，図２，図５によって説明する。図１は本発明に係る第１実施例の孔部の溝形状と工具を示す斜視図、図２は孔部底面の溝形状を示す図１に対応する上面図、図５は第１実施例の切削工程を示す斜視図である。
【００１４】
図１，２において、アルミダイキャスト等によって成形された被切削材１には円筒状の孔３が設けられ、該孔３は素材内径Ａ１で深さＢ１に成形され、内周部に深さＴ１を有する凹溝１ｂが円周方向に等間隔に複数個配設されており、底部には内径Ａ２の中空孔が設けられ深さＴ２を有する凹溝１ｄが、図２に示すように放射状に配設されている。
【００１５】
尚、円筒状の孔３の内径Ａ1 は凸部１ａに切削代Ｔ3 が設けてあり、該切削代Ｔ3 の二分の一程度が前記凹溝１ｂの深さＴ1 である。また、円筒状の孔３の底部にも凸部１ｃに切削代Ｔ4 が設けてあり、該切削代Ｔ4 の二分の一程度が前記溝１ｄの深さＴ2 である。凸部１ａ，１ｃの上面と凹溝１ｂ，１ｄの上面はある程度の傾斜をもった面でつながれている。
【００１６】
工具５にはバイト６を固着する接面５ａ，５ｂが設けられ、該接面５ａ，５ｂに前記バイト６の固着面６ｄ，６ｃを当接し、図示されないボルトによって不動に固定されている。
【００１７】
また、バイト６の刃先角６ａおよび刃先面６ｂはアルミダイキャスト製品の被切削材１の内径Ａの内周側面および底面を切削可能に堅牢な刃先を備え、該工具５は図示されないボーリング機械の回転するスピンドルのチャックに取り付け孔５ｃを介して着脱自在に装着される構造となっている。
【００１８】
次に以上の如く構成された第１実施例の作用を図１および図５によって説明する。
図において、アルミダイキャスト等の製法によって円筒状の孔３に上記で説明したように凹溝１ｂ，１ｄは、図示されない成形型によって成形鋳造された被切削材１を図示されないボーリング機械等の固定ベースに、芯だし等の調整をし、切削加工可能に固定して、工具５を取り付け孔５ｃを介して図示しない回転スピンドルのチャックに固着して、切削加工の準備を完了する。
【００１９】
つぎに、定められた回転数、送り速度で回転するスピンドルのチャックに固着された工具５が下降し、被切削材１に当接し円筒状の孔３の切削加工が開始されて、バイト６の刃先角６ａおよび刃先面６ｂによって、前記被切削材１の円筒状の孔３の内径Ａ1 は内径Ａに切削され、切り屑が刃面６ｅで抵抗を受けながら、上方に押し上げられて切り屑に三分の二程度の亀裂が入り凸部１ａと厚みの薄い凹溝１ｂの連結部分で切断され、断続的な切り屑１ａ，１ｂとして回転する工具５によって被切削材１の上部に排出されて、前記被切削材１は円筒状の内径Ａ、深さＢ1 の寸度に仕上げられる。
【００２０】
被切削材１の円筒状底の凸部１ｃと放射状の凹溝１ｄは前記バイト６の刃先面６ｂによって、断続的な切り屑として回転する工具５によって上部に排出されて、前記被切削材１は円筒状の孔３は内径Ａ、深さＢ寸度に切削仕上げられて、該被切削材１は円筒状の孔３にはベアリング等の挿入可能な製品となる。
【００２１】
本発明に係る第２実施例を図１，３によって説明する。
図３は本発明の第２実施例の孔部底面の溝形状を示す上面図であり、前記第１実施例との相違点について図１，図３によって説明する。
図１において、アルミダイキャスト等によって成形する被切削材１には円筒状の孔３が設けられており、該孔３の円筒部分および工具５については第１実施例と同様であり説明を省略する。
【００２２】
前記孔３の円筒の底部には図３で示すように、内径Ａ1 の中空孔が設けられ深さＴ2 を有する凹溝１ｈが、図３に示すように螺旋状に配設されて凸部１ｇの上面と凹溝１ｈの上面はある程度の傾斜をもった面でつながれた形状である。
【００２３】
孔３の円筒底部の切削過程において、凸部１ｇは工具５に固定されたバイト６の刃先面６ｂによって、螺旋状の凹溝１ｈを残して断続的な切り屑として排出されるが、回転するバイト６の刃先面６ｂには図３のＫ−Ｋに示すように、断続する凸部１ｇ面に連続して当接することで該刃先面６ｂは間欠衝撃を受けない円筒底部の凹溝構造である。
【００２４】
本発明に係る第３実施例を図１，４によって説明する。
図４は本発明に係る第３実施例の孔部底面の溝形状を示す上面図であり、第１実施例との相違点について図１，図４によって説明する。
図１において、アルミダイキャスト等によって成形する被切削材１には円筒状の孔３が設けられており、該孔３の円筒部分および工具５については第１実施例と同様であり説明を省略する。
【００２５】
前記孔３の円筒の底部には図４で示すように、内径Ａ2 の中空孔が設けられ深さＴ2 を有する半円状の窪み１ｌ，１ｍ等が、図４に示すように円筒底部の内外周に配設され、底面１ｋと半円窪み１ｌ，１ｍの上面はある程度の傾斜をもった面でつながれた形状である。
【００２６】
孔３の円筒底部の切削過程において、底面１ｋは工具５に固定されたバイト６の刃先面６ｂによって、切削され、切り屑が刃面６ｅで抵抗を受けながら上方に押し上げられて切り屑の三分の二程度の亀裂が入り、半円窪み１ｌ，１ｍで面幅の狭くなる部分で切断され断続的な切り屑として、回転する工具５によって被切削材１の上部に排出され刃先面６ｂは間欠衝撃を受けない円筒底部の半円窪み構造である。
【００２７】
本発明に係る第４実施例を図１，６によって説明する。図１は前出、図６は本発明の孔部の溝形状を示す斜視図であり、実施例１との相違点について図６によって説明する。図６において、アルミダイキャスト等によって成形する被切削材１には円筒状の孔３が設けられており、該孔３の内周部に深さＴ１を有する半円溝１ｒが円周方向に等間隔に複数個配設されており、中空孔が設けられた底部には深さＴ３を有する半円溝１ｓが放射状に配設された形状の製品素材である。上記の溝形状以外は第１実施例と同様であり説明を省略する。
【００２８】
本発明に係る第５実施例を図３，図７によって説明する。図３は前出、図７は本発明の孔部の溝形状を示す斜視図であり、第２実施例との相違点について図７によって説明する。図７において、アルミダイキャスト等によって成形する被切削材１には円筒状の孔３が設けられており、該孔３の内周部に深さＴ１を有する半円溝１ｒが円周方向に等間隔に複数個配設されており、中空孔が設けられた底部には深さＴ２を有する半円溝１ｗが螺旋状に配設された形状の製品素材である。上記の溝形状以外は第２実施例と同様であり説明を省略する。前記の実施例において、孔３は円筒で盲状になっているが、突き通しの穴となっていても同様の作用効果が得られる。
【００２９】
【発明の効果】
この発明は、以上のように製品素材を成形する過程において、製品素材の円筒状孔部に複数の溝または窪みを設けることによって、円筒状孔部をボーリング切削加工する過程で発生する切り屑は断続的に生成されて、被切削部材や工具にからむ現象が除去されることで、工具（バイト刃先）の寿命が大幅（約５倍）に延長され、工具保守質の低減を図るとともに、切削面に工具欠損および切り屑による傷の痕跡減少で加工寸度と品質の向上を図る。また、切り屑除去作業が削減されて加工作業の安全確保と加工時間削減を可能とすることで、コストダウンおよび作業条件・効率の向上、品質向上と優れた効果をあげる。
【図面の簡単な説明】
【図１】本発明に係る第１実施例の孔部の溝形状と工具を示す斜視図。
【図２】本発明に係る第１実施例の孔部底面の溝形状を示す上面図。
【図３】本発明に係る第２実施例の孔部底面の溝形状を示す上面図。
【図４】本発明に係る第３実施例の孔部底面の溝形状を示す上面図。
【図５】本発明に係る切削工程を示す斜視図。
【図６】本発明に係る第４実施例の孔部の溝形状を示す斜視図。
【図７】本発明に係る第５実施例の孔部の溝形状を示す斜視図。
【図８】従来例に係る切削加工前の被削材に加工する方法を説明する縦断面図。
【図９】従来例の図８の側面図。
【符号の説明】
１…被切削材、１ｂ，１ｄ，１ｈ…凹溝、１ｒ，１ｓ，１ｗ…半円溝、５…工具、５ａ，５ｂ…接面、５ｃ…取り付け孔、６…バイト、６ａ…刃先角、６ｂ…刃先面、６ｃ，６ｄ…固着面、Ｔ3 ，Ｔ4 …切削代、Ｔ2 …深さ、Ｔ1 …深さ、１ｌ，１ｍ…窪み。[0001]
[Industrial application fields]
The present invention is a material for casting products such as aluminum die-cast products FC, FCD, resin molded products, etc., in which grooves or dents are provided in the inner peripheral surface and hollow bottom surface of a product whose bore is processed to insert an inner diameter into a product. The present invention relates to a shape and a processing method of the same material shape.
[0002]
[Prior art]
A conventional example will be described with reference to FIGS. FIG. 8 is a sectional view for explaining a conventional processing method, and FIG. 9 is a side view corresponding to FIG.
As a conventional technique of cutting a material of a product formed by providing a cutting allowance in a cylindrical hole that requires machining in products such as aluminum die-casting, the workpiece is rotated with a cutter tool. A method of cutting a workpiece to be cut or fixed with a rotating cutter tool is employed, and chips generated in the cutting process are continuously fed out from the blade edge in a strip shape or a spiral shape.
[0003]
Also, an example of Japanese Patent Application Publication No. 55-042746, which has already been publicly provided as a method for cutting and intermittently feeding chips, will be described.
In the case of performing inner diameter cutting on a work material 11 as shown in FIGS. 8 and 9 for a metal work material before cutting that does not have a notch according to the prior art, the material inner diameter D 0 of the work material 11 and the cutting finish. When the inner diameters D 1 and D 2 and the outer diameter d 0 of the grooving cutter 15 for cutting cutting chips are fixed, the work material 11 is fixed by an appropriate means, and the cutter 15 is rotated to obtain D 1 and D 2 . groove G for the finished diameter moved the center position of the outer diameter d 0 of the cutter 15 in the radial direction of the workpiece 11 is processed to the extent of or does not remain or slightly traces remain in the respective finishing inner surfaces after cutting It is formed in a half-moon shape on the inner surface of the material alone, and chips during cutting can be cut short by this groove and generated intermittently.
[0004]
[Problems to be solved by the invention]
In the process of cutting a cylindrical hole according to the prior art, strips or spiral chips generated continuously from the cutting edge wrap around the work piece or tool, damaging the cutting edge of the tool and scratching the inner surface. In addition to reducing the quality by generating dimensional defects due to tool breakage and tool loss, the life of the tool can be reduced by stopping and removing the work line to remove workpieces and chips wrapped around the tool. There are problems such as reduced product quality and work efficiency.
[0005]
A means for intermittently cutting chips generated from the cutting edge by providing a cutting chip cutting groove for removing these defects is provided on the inner surface of the cylindrical hole of the workpiece to be machined again. This is a process, and therefore, it takes a lot of labor and time for fixing / centering the workpiece, changing tools, etc., and there is a problem that the cost increases.
In addition, since traces of grooves remain on the finished inner surface of the cylindrical hole, there is a problem in that the condensing force of a bearing or the like inserted into the cylindrical hole is reduced and the quality is lowered.
[0006]
An object of the present invention is to solve the above problems and to provide a shape and a processing method of a material from which chips generated in the process of boring a cylindrical hole of the material are released in pieces.
[0007]
[Means for Solving the Problems]
The shape of the product material of the first invention is such that the shape of the hole that needs to be machined into a cylindrical shape is approximately half the depth (T 1 ) of the cutting allowance (T 3 ) at the inner periphery of the cylinder at the product material forming stage. ) Having a plurality of concave grooves (1b) and convex parts (1a) alternately in the circumferential direction, and a concave groove (1h) having a depth of about one-half of the cutting allowance at the bottom part having a hollow hole A plurality of convex portions (1g) are alternately provided in a spiral shape, and a groove is formed so that the cutting edge surface of a rotating tool for cutting the bottom portion is continuously in contact with the upper surface of the convex portion that is intermittent. 1h) and a convex portion (1g), and the material between the convex portion and the concave groove provided on the bottom portion is formed with a side surface having a slight inclination, and enables intermittent chip boring. It is characterized by that.
[0008]
The shape of the product material of the second invention is such that the shape of the hole that needs to be machined into a cylindrical shape is approximately half the depth (T 1 ) of the cutting allowance (T 3 ) at the inner periphery of the cylinder at the product material forming stage. ) Having a plurality of concave grooves (1b) and convex portions (1a) in the circumferential direction, and a semicircular depression having a depth of about one-half of the cutting allowance at the bottom having a hollow hole ( 1 l) (1 m) are provided, and the semi-circular depression (1) is further provided so that chips are interrupted at a portion where the surface width of the cutting edge of the cutting tool rotating to cut the bottom is reduced. 1l) (1m) are provided alternately on the inner and outer peripheries of the bottom part, and a material formed in a shape connected with an inclined surface between the bottom surface (1k) and the semicircular depression (1l, 1m), It is characterized by enabling intermittent chip boring .
[0009]
A product material shape processing method according to a third invention is a method for processing a product material according to claim 1 or 2, wherein the groove or the recess is manufactured with a molding die to form the product material, When boring the cylindrical hole portion of the same material, it is characterized by comprising a cutting step of intermittently generating cutting waste by the groove or recess.
[0012]
[Action]
The material of the product formed by providing grooves on the inner peripheral axis direction and bottom surface of the cylindrical hole is fixed to the base of the boring machine, and the inner diameter of the material is cut by the rotation and lowering of the tool mounted on the rotating part. At that time, the generated chips receive resistance of the tool due to the difference in thickness depending on the presence / absence of the groove, and in the part where the thickness of the uneven connection part of the groove part is different in the process of being cracked and continuously discharged It is cut and discharged to the outside by turning the tool as intermittent chips.
Further, the bottom surface having the hollow hole becomes intermittent chips by the rotation of the lower blade surface of the cutter, and is discharged to the outside in the same manner as the cylindrical portion, so that the processing of the cylindrical hole having the bottom surface is completed without any problem.
[0013]
【Example】
A first embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view showing a groove shape and a tool of a hole according to a first embodiment of the present invention, FIG. 2 is a top view corresponding to FIG. 1 showing a groove shape of a bottom of the hole, and FIG. 5 is a first embodiment. It is a perspective view which shows the cutting process.
[0014]
1 and 2, a cylindrical hole 3 is provided in the object cutting material 1 which has been formed by aluminum die casting or the like, the hole 3 is formed into a depth B 1 of a material the inner diameter A 1, the inner peripheral portion groove 1b having a depth T 1 is being plural equally spaced in the circumferential direction, bottom groove 1d having a depth T 2 is provided a hollow hole having an inner diameter of a 2 has, 2 As shown in FIG.
[0015]
The inner diameter A 1 of the cylindrical bore 3 is provided with a cutting allowance T 3 to the convex portion 1a, half about one of the cutting allowance T 3 is the depth T 1 of the concave groove 1b. Also, the bottom of the cylindrical bore. 3 are cutting allowance T 4 the convex portion 1c is provided, half about one of the cutting allowance T 4 is the depth T 2 of the said groove 1d. The upper surfaces of the convex portions 1a and 1c and the upper surfaces of the concave grooves 1b and 1d are connected by a surface having a certain degree of inclination.
[0016]
The tool 5 is provided with contact surfaces 5a and 5b for fixing the cutting tool 6, the fixing surfaces 6d and 6c of the cutting tool 6 are brought into contact with the contact surfaces 5a and 5b, and are fixedly fixed by bolts (not shown).
[0017]
Further, the cutting edge angle 6a and the cutting edge surface 6b of the cutting tool 6 are provided with a robust cutting edge capable of cutting the inner peripheral side surface and the bottom surface of the inner diameter A of the workpiece 1 of an aluminum die cast product, and the tool 5 is a boring machine not shown. The rotating spindle chuck is detachably mounted through the mounting hole 5c.
[0018]
Next, the operation of the first embodiment configured as described above will be described with reference to FIGS.
In the drawing, the concave grooves 1b and 1d are formed in the cylindrical hole 3 by a manufacturing method such as aluminum die casting, as described above, and the workpiece 1 molded and cast by a molding die not shown is fixed to a boring machine or the like not shown. The centering and the like are adjusted to the base and fixed so as to be capable of cutting, and the tool 5 is fixed to a chuck of a rotating spindle (not shown) through the mounting hole 5c to complete the preparation for cutting.
[0019]
Next, the tool 5 fixed to the chuck of the spindle that rotates at a predetermined rotational speed and feed rate is lowered, and comes into contact with the workpiece 1 to start cutting the cylindrical hole 3. By the cutting edge angle 6a and the cutting edge surface 6b, the inner diameter A1 of the cylindrical hole 3 of the workpiece 1 is cut to the inner diameter A, and the chips are pushed upward while receiving resistance at the cutting edge 6e. About two-thirds of the cracks are formed in the cut portion, cut at the connecting portion of the convex portion 1a and the thin groove 1b, and discharged to the upper portion of the workpiece 1 by the rotating tool 5 as intermittent chips 1a and 1b. Thus, the workpiece 1 is finished to have a cylindrical inner diameter A and a depth B 1 .
[0020]
The cylindrical bottom convex portion 1c and the radial concave groove 1d of the workpiece 1 are discharged to the upper portion by the tool 5 rotating as intermittent chips by the cutting edge surface 6b of the cutting tool 6, and the workpiece 1 is cut. The cylindrical hole 3 is cut and finished to an inner diameter A and a depth B, and the workpiece 1 becomes a product that can be inserted into the cylindrical hole 3 such as a bearing.
[0021]
A second embodiment of the present invention will be described with reference to FIGS.
FIG. 3 is a top view showing the groove shape of the bottom surface of the hole according to the second embodiment of the present invention. Differences from the first embodiment will be described with reference to FIGS.
In FIG. 1, a workpiece 1 formed by aluminum die casting or the like is provided with a cylindrical hole 3, and the cylindrical portion of the hole 3 and the tool 5 are the same as those in the first embodiment, and the description thereof is omitted. To do.
[0022]
As shown in FIG. 3, a hollow hole having an inner diameter A 1 is provided at the bottom of the cylinder of the hole 3, and a concave groove 1h having a depth T 2 is spirally arranged as shown in FIG. The upper surface of the portion 1g and the upper surface of the concave groove 1h are connected by a surface having a certain degree of inclination.
[0023]
In the cutting process of the cylindrical bottom portion of the hole 3, the convex portion 1g is discharged as intermittent chips by leaving the spiral concave groove 1h by the cutting edge surface 6b of the cutting tool 6 fixed to the tool 5, but rotates. As shown by KK in FIG. 3, the cutting edge surface 6b of the cutting tool 6 is continuously in contact with the surface of the intermittent convex portion 1g so that the cutting edge surface 6b has a concave groove structure at the bottom of the cylinder that is not subjected to intermittent impact. is there.
[0024]
A third embodiment of the present invention will be described with reference to FIGS.
FIG. 4 is a top view showing the groove shape of the bottom surface of the hole according to the third embodiment of the present invention. Differences from the first embodiment will be described with reference to FIGS.
In FIG. 1, a workpiece 1 formed by aluminum die casting or the like is provided with a cylindrical hole 3, and the cylindrical portion of the hole 3 and the tool 5 are the same as those in the first embodiment, and the description thereof is omitted. To do.
[0025]
The bottom of the cylinder of the hole 3 as shown in Figure 4, semicircular recesses 1l having a depth T 2 is provided a hollow hole having an inner diameter A 2, 1 m or the like, the cylindrical bottom portion as shown in FIG. 4 The bottom surface 1k and the upper surfaces of the semicircular depressions 11 and 1m are connected to each other by a surface having a certain degree of inclination.
[0026]
In the process of cutting the cylindrical bottom of the hole 3, the bottom surface 1 k is cut by the cutting edge surface 6 b of the cutting tool 6 fixed to the tool 5, and the chips are pushed upward while receiving resistance at the cutting edge surface 6 e, so The cutting edge 1b is cut into a semicircular recess 1l, 1m at a portion where the surface width is narrowed, and is intermittently cut as a chip and discharged to the upper part of the workpiece 1 by the rotating tool 5, and the cutting edge surface 6b is It is a semicircular hollow structure at the bottom of the cylinder that is not subjected to intermittent impact.
[0027]
A fourth embodiment according to the present invention will be described with reference to FIGS. FIG. 1 is the above, FIG. 6 is a perspective view showing the groove shape of the hole portion of the present invention, and differences from the first embodiment will be described with reference to FIG. 6, in the cutting member 1 is molded by aluminum die casting or the like is provided with a cylindrical bore 3, semicircular grooves 1r is circumferentially having a depth T 1 on the inner periphery of the bore 3 are plural equally spaced on, the bottom hollow hole is provided, a product material shaped semicircular grooves 1s is disposed radially having a depth T 3. Except for the groove shape, the second embodiment is the same as the first embodiment, and a description thereof will be omitted.
[0028]
A fifth embodiment according to the present invention will be described with reference to FIGS. FIG. 3 is a perspective view showing the groove shape of the hole portion of the present invention, and FIG. 7 is a perspective view showing differences from the second embodiment. 7, in the cutting member 1 is molded by aluminum die casting or the like is provided with a cylindrical bore 3, semicircular grooves 1r is circumferentially having a depth T 1 on the inner periphery of the bore 3 are plural equally spaced, the semi-circular groove 1w having a depth T 2 are the bottom hollow hole is provided is a product material shape arranged helically. Except for the groove shape, the second embodiment is the same as the second embodiment, and the description thereof is omitted. In the above embodiment, the hole 3 is cylindrical and blind, but the same effect can be obtained even if it is a through hole.
[0029]
【The invention's effect】
In the process of forming the product material as described above, the present invention provides a plurality of grooves or depressions in the cylindrical hole portion of the product material, so that chips generated in the process of boring and cutting the cylindrical hole portion are By removing the phenomenon that is generated intermittently and entangled with the workpiece or tool, the tool (tool bite) life is greatly extended (about 5 times), and the tool maintenance quality is reduced and cutting is performed. Improve machining size and quality by reducing traces of scratches caused by chipped chips and chips on the surface. In addition, chip removal work can be reduced to ensure the safety of machining work and reduce machining time, thereby reducing costs, improving working conditions / efficiency, and improving quality.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a groove shape of a hole and a tool according to a first embodiment of the present invention.
FIG. 2 is a top view showing the groove shape of the bottom surface of the hole according to the first embodiment of the present invention.
FIG. 3 is a top view showing a groove shape of a bottom surface of a hole according to a second embodiment of the present invention.
FIG. 4 is a top view showing a groove shape of a bottom surface of a hole according to a third embodiment of the present invention.
FIG. 5 is a perspective view showing a cutting process according to the present invention.
FIG. 6 is a perspective view showing a groove shape of a hole of a fourth embodiment according to the present invention.
FIG. 7 is a perspective view showing a groove shape of a hole of a fifth embodiment according to the present invention.
FIG. 8 is a longitudinal sectional view for explaining a method of machining a work material before cutting according to a conventional example.
FIG. 9 is a side view of FIG. 8 of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Material to be cut, 1b, 1d, 1h ... Groove, 1r, 1s, 1w ... Semicircular groove, 5 ... Tool, 5a, 5b ... Contact surface, 5c ... Mounting hole, 6 ... Tool bit, 6a ... Cutting edge angle, 6b: Cutting edge surface, 6c, 6d: Adhering surface, T 3 , T 4 ... Cutting allowance, T 2 ... Depth, T 1 ... Depth, 1l, 1m ... Depression.

Claims (3)

円筒状に機械加工を要する孔部の形状を製品の素材成形段階において、円筒内周部に切削代（Ｔ３）の二分の一程度の深さ（Ｔ１）を有する凹溝（１ｂ）と凸部（１ａ）を円周方向に交互に複数個設けるとともに、中空孔を有する底部に切削代の二分の一程度の深さを有する凹溝（１ｈ）と凸部（１ｇ）を螺旋状に交互に複数個設け、さらに、前記底部を切削加工するために回転するバイトの刃先面が断続する前記凸部の上面に連続して当接するように凹溝（１ｈ）と凸部（１ｇ）を設け、前記底部に設けた凸部と凹溝間の側面を僅かな傾斜をもった側面で形成した素材をもって、断続的な切り屑のボーリング加工を可能としたことを特徴とする製品素材の形状。The shape of the hole that needs to be machined into a cylindrical shape is formed into a groove (1b) having a depth (T 1 ) of about half of the cutting allowance (T 3 ) in the cylindrical inner periphery at the material forming stage of the product. A plurality of convex portions (1a) are alternately provided in the circumferential direction, and a concave groove (1h) and a convex portion (1g) having a depth of about a half of the cutting allowance are spirally formed in the bottom portion having a hollow hole. A plurality of grooves are alternately provided, and a groove (1h) and a protrusion (1g) are provided so that the cutting edge of the cutting tool rotating to cut the bottom is continuously in contact with the upper surface of the protrusion. provided, with the material forming the side surfaces between the convex portion and the concave groove provided in the bottom portion at a side having a slight inclination, the product material shape of which is characterized in that to enable the boring intermittent chips . 円筒状に機械加工を要する孔部の形状を製品の素材成形段階において、円筒内周部に切削代（Ｔ３）の二分の一程度の深さ（Ｔ１）を有する凹溝（１ｂ）と凸部（１ａ）を円周方向に交互に複数個設けるとともに、中空孔を有する底部に切削代の二分の一程度の深さを有する半円状の窪み（１ｌ）（１ｍ）を複数個設け、さらに、前記底部を切削加工するために回転するバイトの刃先面の当接する面幅が狭くなる部分で切り屑が断続するように前記半円状の窪み（１ｌ）（１ｍ）を前記底部の内外周に複数個交互に設け、底面（１ｋ）と半円状の窪み（１ｌ，１ｍ）間は傾斜をもった面でつながれた形状で形成した素材をもって、断続的な切り屑のボーリング加工を可能としたことを特徴とする製品素材の形状。The shape of the hole that needs to be machined into a cylindrical shape is formed into a groove (1b) having a depth (T 1 ) of about half of the cutting allowance (T 3 ) in the cylindrical inner periphery at the material forming stage of the product. A plurality of convex portions (1a) are alternately provided in the circumferential direction, and a plurality of semicircular recesses (1l) (1m) having a depth of about one half of the cutting allowance are provided at the bottom portion having a hollow hole. Further, the semicircular recess (1l) (1m) is formed in the bottom so that chips are intermittently formed at a portion where the surface width of the cutting edge of the cutting tool rotating to cut the bottom is reduced. A plurality of materials are alternately provided on the inner and outer circumferences, and intermittent cutting boring is performed using a material formed by connecting the bottom surface (1k) and the semicircular recess (1l, 1m) with an inclined surface. The shape of the product material, which is characterized by being possible. 請求項１若しくは２記載の製品素材の加工方法であって、前記溝または窪みを成形型で製造して前記製品素材の形状とする成形鋳造工程と、同素材の円筒状孔部をボーリング加工する際、前記溝又は窪みにより切削屑を断続的に生成する切削加工工程とからなることを特徴とする製品素材の加工方法。 3. A method of processing a product material according to claim 1 or 2, wherein a forming and casting step in which the groove or the depression is manufactured with a mold and the shape of the product material is formed, and a cylindrical hole portion of the material is bored. At the time, the manufacturing method of the product raw material which consists of a cutting process which produces | generates cutting waste intermittently by the said groove | channel or a hollow.
JP16309295A 1995-06-07 1995-06-07 Product material shape and processing method Expired - Lifetime JP3739834B2 (en)

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CN103447567B (en) * 2013-08-09 2016-01-20 贵州风雷航空军械有限责任公司 A kind of method of processing thin-walled cone axial hole
CN103769643A (en) * 2013-12-20 2014-05-07 柳州正菱集团有限公司 Method for machining casting of automobile brake adjusting arm through threaded inner hole drilling
CN110560706B (en) * 2019-07-27 2020-06-16 常熟市万顺轴承有限公司 Inner cambered surface grooving device for shaft sleeve workpiece
CN111390734B (en) * 2020-04-27 2021-08-31 鲁东大学 Grinding device for processing inner hole axial chute

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