JPH1133807A - Method and tool for machining of intersecting hole - Google Patents
Method and tool for machining of intersecting holeInfo
- Publication number
- JPH1133807A JPH1133807A JP20384097A JP20384097A JPH1133807A JP H1133807 A JPH1133807 A JP H1133807A JP 20384097 A JP20384097 A JP 20384097A JP 20384097 A JP20384097 A JP 20384097A JP H1133807 A JPH1133807 A JP H1133807A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- tool
- burrs
- finishing
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
- B23B41/12—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for forming working surfaces of cylinders, of bearings, e.g. in heads of driving rods, or of other engine parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2215/00—Details of workpieces
- B23B2215/20—Crankshafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2250/00—Compensating adverse effects during turning, boring or drilling
- B23B2250/12—Cooling and lubrication
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
- Drilling Tools (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、交差する二つの穴
を工具により切削加工する交差穴加工方法およびその方
法の実施に用いる穴加工用工具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for machining a crossed hole by cutting two intersecting holes with a tool, and a tool for drilling a hole used for carrying out the method.
【０００２】[0002]
【従来の技術】例えば、車両用エンジンのクランク軸に
は、図６および図７に示すように、二つの穴１と２とを
交差させた油穴３が形成される。この油穴３を構成する
二つの穴のうち、一方の穴（第１の穴）１は、クランク
軸５のジャーナル部６を径方向へ貫通して設けられ、他
方の穴（第２の穴）２は、クランク軸５のピン部７から
前記ジャーナル部６まで貫通して設けられており、油穴
３は第１の穴１に対して第２の穴２を所定の傾斜角度で
交差させた形状となっている。2. Description of the Related Art For example, an oil hole 3 in which two holes 1 and 2 cross each other is formed in a crankshaft of a vehicle engine as shown in FIGS. One of the two holes constituting the oil hole 3 (first hole) 1 is provided to penetrate the journal portion 6 of the crankshaft 5 in the radial direction, and the other hole (second hole) is provided. 2) is provided so as to penetrate from the pin portion 7 of the crankshaft 5 to the journal portion 6, and the oil hole 3 intersects the first hole 1 with the second hole 2 at a predetermined inclination angle. Shape.
【０００３】ところで、上記した油穴３の加工は、従来
一般には、図８に示すように、先ず、工具（ドリル）８
をジャーナル部６に対して切り込ませて第１の穴１を加
工し（）、続いて、他の工具（ドリル）９をピン部７
からジャーナル部６へ斜め方向に切り込ませて第２の穴
２を加工する（）ようにしていた。しかし、このよう
な加工様式によれば、第１の穴１と第２の穴２との交差
部にバリ４が発生するのを避けることはできず、そのま
ま放置したのでは、エンジン使用中にバリ４が脱落し
て、軸受メタルの焼付きを起すなどの弊害をもたらすこ
とになる。[0003] By the way, the above-described machining of the oil hole 3 is generally carried out by first, as shown in FIG.
Is cut into the journal portion 6 to machine the first hole 1 (), and then another tool (drill) 9 is inserted into the pin portion 7.
And the second hole 2 is machined in a diagonal direction into the journal portion 6 from (). However, according to such a processing method, it is impossible to avoid the generation of burrs 4 at the intersection of the first hole 1 and the second hole 2, and if it is left as it is, it will not be possible to use the engine during use. The burrs 4 fall off, causing adverse effects such as seizure of the bearing metal.
【０００４】[0004]
【発明が解決しようとする課題】そこで従来は、上記し
た工具８，９を加工済の穴１，２に再度回転挿入し、あ
るいは別に用意したワイヤブラシを同穴に回転挿入して
バリ４を除去するようにしていた。しかし、このような
バリ取り方法では、バリ４に対する工具やブラシの接触
が不十分なため、バリ４の大部分がそのまま、あるいは
相手側の穴内に倒れ込んで（図８に符号４ａで示す）残
ることが多い上、芯ずれによる２次切削（せん断作用を
伴わない）で新たに２次バリが発生することが多く、そ
の後さらに、高圧洗浄や電解による特別のバリ取りを実
施しなければならない状況にあった。Therefore, conventionally, the burrs 4 are inserted by rotating the tools 8 and 9 into the holes 1 and 2 again, or by inserting a separately prepared wire brush into the holes. Had to be removed. However, in such a deburring method, since the tool or the brush does not sufficiently contact the burr 4, most of the burr 4 remains as it is or falls down into a hole on the other side (indicated by reference numeral 4a in FIG. 8). In many cases, secondary burrs are often generated by secondary cutting (without shearing action) due to misalignment, and special deburring by high-pressure cleaning and electrolysis must be performed thereafter. Was in
【０００５】なお、例えば特開昭６２−６３００４号公
報には、最初に開けた一方の穴に対して他方の穴を交差
形成するに際し、１８０度異なる二方向より交互に穴開
けを行い、この他方の穴の最初の穴開けで生じたバリ
を、次の反対側からの穴開けにより除去する方法が提案
されているが、この方法でも、同径工具による穴開けの
繰返しとなるため、上記した接触不十分によるバリ残り
や芯ずれによる２次バリの発生が避けられず、根本的な
解決には至らない。[0005] For example, in Japanese Patent Application Laid-Open No. 62-63004, when one of the first holes is crossed with the other hole, holes are alternately formed from two directions different by 180 degrees. A method has been proposed in which the burr generated in the first drilling of the other hole is removed by drilling from the next opposite side, but this method also involves repeated drilling with the same diameter tool. The occurrence of secondary burrs due to remaining burrs due to insufficient contact or misalignment is inevitable, and does not lead to a fundamental solution.
【０００６】本発明は、上記従来の問題点を解決するこ
とを課題としてなされたもので、その目的とするところ
は、二つの穴の交差部に生じるバリを穴開け工程内で確
実に除去できるようにし、もって特別のバリ取り工程を
不要とする交差穴加工方法を提供することにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to reliably remove burrs generated at the intersection of two holes in a hole forming step. Accordingly, an object of the present invention is to provide a method of machining a cross hole, which eliminates the need for a special deburring step.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するた
め、本発明の方法は、先に加工する第１の穴の、少なく
とも第２の穴との交差部分を、所定の仕上寸法より小径
に形成し、第２の穴を加工した後、前記第１の穴を所定
の仕上寸法に仕上加工することを特徴とする。この方法
によれば、第２の穴を加工する際生じるバリは、先に加
工した第１の穴の小径部分に発生し、したがって、この
小径部分の除去代（取り代）を適当な大きさに設定して
おくことで、その後、この小径部分の穴内面を削除すれ
ば、その削除される肉と一緒にバリが除去される。In order to achieve the above object, a method of the present invention is to reduce the intersection of at least the first hole to be processed with at least the second hole to a diameter smaller than a predetermined finishing dimension. After forming and processing the second hole, the first hole is finished to a predetermined finish size. According to this method, burrs generated when processing the second hole are generated in the small diameter portion of the previously processed first hole. Therefore, the removal allowance (removal allowance) of the small diameter portion is set to an appropriate size. Then, by removing the inner surface of the hole of the small diameter portion, the burr is removed together with the meat to be removed.
【０００８】交差穴としては、第１の穴に対して第２の
穴が傾斜して交差形成される場合があり、この場合は、
上記第１の穴を仕上加工する際、第２の穴の加工方向に
見て、該第２の穴が第１の穴に対して鈍角に交差する側
から工具を進入させるようにするのが望ましい。このよ
うにすることで、第１の穴を仕上加工する際、第２の穴
に対して工具が抜ける側の角部が鈍角となって、その角
部の切削予定面剛性が大きくなっているので、２次バリ
の発生も確実に防止される。In some cases, the second hole is formed so as to intersect with the first hole at an angle with respect to the first hole.
When finishing the first hole, it is preferable to make the tool enter from the side where the second hole intersects the first hole at an obtuse angle when viewed in the processing direction of the second hole. desirable. In this way, when finishing the first hole, the corner on the side from which the tool comes out with respect to the second hole becomes obtuse, and the rigidity of the corner to be cut increases. Therefore, the occurrence of secondary burrs is reliably prevented.
【０００９】本発明の穴加工用工具は、上記第１の穴を
仕上加工するためのもので、先端部に、穴の小径部分に
嵌入可能なガイド部を設けたことを特徴としている。こ
のように、先端部にガイド部を設けることで、第１の穴
の小径部分を仕上加工する際、先に開けた穴に対する工
具の芯ずれを防止することができ、穴内面を均等に削除
することができて、バリ除去が確実となる。[0009] The hole drilling tool of the present invention is for finishing the first hole, and is characterized in that a guide portion is provided at a tip end thereof so as to be able to be fitted into a small diameter portion of the hole. As described above, by providing the guide portion at the distal end, when finishing the small diameter portion of the first hole, it is possible to prevent the tool from being misaligned with the previously drilled hole and to uniformly delete the inner surface of the hole. And burrs can be reliably removed.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態を添付
図面に基いて説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００１１】図１は、本発明にかゝる交差穴加工方法を
示したものである。なお、本発明で加工しようとする交
差穴は、前出図６、７に示したクランク軸５の油穴３で
あり、こゝでは、図６、７に示した部分と同一部分には
同一符号を付すこととする。この油穴３の加工に際して
は、先ず、図１に示すように、クランク軸５（図６参
照）のジャーナル部６に対し、径の異なる二つの工具
（ドリル）８，８′を180 度反対側から切り込ませて、
第１の穴１を加工する。この第１の穴１は、工具８によ
り所定の仕上寸法に加工した大径部１ａと、工具８′に
より仕上寸法より小径に加工した小径部１ｂとからなっ
ている。こゝで、大径部１ａの穴径（仕上径）Ｄと小径
穴１ｂの穴径ｄとの差Δ（Δ＝Ｄ−ｄ）は、後に小径穴
１ｂを切削する際、確実にせん断作用を生じさせるに足
る大きさ（一例として、Δ＝0.8mm）に設定されてい
る。FIG. 1 shows a method of forming a cross hole according to the present invention. The cross hole to be machined in the present invention is the oil hole 3 of the crankshaft 5 shown in FIGS. 6 and 7, and the same portion as the portion shown in FIGS. A reference numeral will be attached. In processing the oil hole 3, first, as shown in FIG. 1, two tools (drills) 8, 8 'having different diameters are opposed by 180 degrees to a journal portion 6 of a crankshaft 5 (see FIG. 6). Cut from the side,
The first hole 1 is machined. The first hole 1 is composed of a large-diameter portion 1a machined to a predetermined finishing size by a tool 8 and a small-diameter portion 1b machined to a smaller diameter than the finishing size by a tool 8 '. Here, the difference Δ (Δ = D−d) between the hole diameter (finished diameter) D of the large-diameter portion 1a and the hole diameter d of the small-diameter hole 1b is determined by a reliable shearing action when the small-diameter hole 1b is cut later. (For example, Δ = 0.8 mm).
【００１２】次に、図１に示すように、クランク軸５
のピン部７（図６参照）からジャーナル部６へ斜め方向
に工具（ドリル）９を切り込ませて第２の穴２を加工す
る。この第２の穴２は、ジャーナル部６側において前記
第１の穴１の小径部１ｂに対し、所定の角度で交差して
開通し、その開通部（交差部）にはバリ４が発生するよ
うになる。なお、このバリ４は、第２の穴２の加工方向
に見て、該第２の穴２が第１の穴１（１ｂ）に対して鋭
角に交差する角部Ｃ1 側に生じる。Next, as shown in FIG.
The tool (drill) 9 is cut obliquely from the pin portion 7 (see FIG. 6) into the journal portion 6 to machine the second hole 2. The second hole 2 crosses the small diameter portion 1b of the first hole 1 at a predetermined angle on the journal portion 6 side and is opened, and burrs 4 are generated at the opening portion (intersection). Become like Incidentally, the burr 4, when viewed in a second machining direction of the hole 2, resulting in the hole 2 of the second corner portion C 1 side intersecting at an acute angle to the first bore 1 (1b).
【００１３】その後、図１およびに示すように、別
途用意した後述の穴加工用工具（ドリル）１０を先に加
工した第１の穴１の小径部１ｂに、大径部１ａと反対側
から挿入し、該小径部１ｂを所定の仕上寸法（Ｄ）に仕
上加工する。この時、工具１０による除去代δは十分に
ある（δ＝Δ／２＝0.4mm ）ので、交差部に存在してい
たバリ４は、工具１０によって削除される小径部１ｂの
穴内面の肉と一緒に除去される。また、工具１０が、第
２の穴２に対して抜ける側の角部Ｃ2 は鈍角となってい
るので、その角部Ｃ2 の切削予定面剛性は十分に大き
く、ここに２次バリが発生することはない。しかも、前
記角部Ｃ2 と対向する側の角部Ｃ1 は鋭角になっている
が、この部分は工具１０が入り込む側のため切削抵抗の
ベクトルが切削予定面に影響せず、したがってこの鋭角
な角部Ｃ1 にも２次バリは発生しない。すなわち、工具
１０によってバリ４が削除されるばかりか、２次バリの
発生も抑制され、バリのない油穴３が完成するようにな
る。Then, as shown in FIG. 1 and FIG. 1, a separately prepared hole drilling tool (drill) 10 described below is inserted into the small-diameter portion 1b of the first hole 1 previously machined from the side opposite to the large-diameter portion 1a. Then, the small diameter portion 1b is finished to a predetermined finishing dimension (D). At this time, since the removal allowance δ by the tool 10 is sufficient (δ = Δ / 2 = 0.4 mm), the burr 4 existing at the intersection is removed from the inner surface of the hole of the small-diameter portion 1b deleted by the tool 10. Is removed along with. Further, since the corner C 2 on the side where the tool 10 comes out of the second hole 2 is obtuse, the rigidity of the corner C 2 to be cut is sufficiently large, and the secondary burr is formed here. It does not occur. Moreover, although the corner portion C 2 and the opposite corner C 1 on the side of is an acute angle, this part vector of cutting forces for the side where the tool 10 enters does not affect the preset cutting plane, therefore the acute angle the secondary burr does not occur in a corner portion C 1. That is, not only the burrs 4 are deleted by the tool 10, but also the generation of secondary burrs is suppressed, and the oil holes 3 without burrs are completed.
【００１４】こゝで、上記穴加工用工具１０は、図２お
よび図３に示すように、シャンク部１１と、リーディン
グエッジ１２を有する刃部１３と、刃部１３の先端に連
接された、刃部１３より小径のガイド部１４とからなっ
ている。刃部１３の先端であってガイド部１４との接続
段差は切れ刃１５として構成され、また刃部１３とガイ
ド部１４とには複数のねじれ溝１６が共通に形成されて
いる。ガイド部１４の周面１４ａは平坦に形成されてお
り、その周面１４ａを含む円筒面の直径は、上記第１の
穴１の小径部１ｂの穴径ｄよりわずか小さく設定されて
いる。As shown in FIGS. 2 and 3, the drilling tool 10 is connected to a shank portion 11, a blade portion 13 having a leading edge 12, and a tip of the blade portion 13. The guide portion 14 has a smaller diameter than the blade portion 13. The connection step between the tip of the blade portion 13 and the guide portion 14 is configured as a cutting edge 15, and the blade portion 13 and the guide portion 14 are formed with a plurality of twist grooves 16 in common. The peripheral surface 14 a of the guide portion 14 is formed flat, and the diameter of the cylindrical surface including the peripheral surface 14 a is set slightly smaller than the hole diameter d of the small diameter portion 1 b of the first hole 1.
【００１５】このような工具１０を用いることにより、
第１の穴１の小径部１ｂを仕上げ加工する際、先ず工具
１０の先端のガイド部１４が小径部１ｂに挿入され、工
具１０の刃部１３は加工済みの第１の穴１に同心に誘導
される。この結果、小径部１ｂの穴内面は切れ刃１５に
より均等に削除され、バリ４は確実に除去される。By using such a tool 10,
When finishing the small diameter portion 1b of the first hole 1, the guide portion 14 at the tip of the tool 10 is first inserted into the small diameter portion 1b, and the blade portion 13 of the tool 10 is concentric with the processed first hole 1. Be guided. As a result, the inner surface of the hole of the small diameter portion 1b is evenly deleted by the cutting edge 15, and the burr 4 is reliably removed.
【００１６】なお、上記実施の形態において、第１の穴
１の加工に際して、第２の穴２と交差する部分のみを小
径部１ｂとしたが、本発明は、第１の穴１の全長を小径
部として形成しても良いものである。この場合は、工具
１０を、先に開けた穴（第１の穴）の全長に通して、穴
全体を仕上加工する。In the above embodiment, only the portion that intersects with the second hole 2 is formed as the small-diameter portion 1b when the first hole 1 is machined. It may be formed as a small diameter portion. In this case, the tool 10 is passed through the entire length of the previously drilled hole (first hole) to finish the entire hole.
【００１７】[0017]
実施例１ 第１および第２の穴１、２の仕上寸法（穴径）を６mmと
し、先に開ける第１の穴１の小径部１ｂの穴径ｄ、すな
わち工具１０による除去代δを０から0.55mmまで種々に
変化させて、上記実施の形態で示した手順（図１）で交
差穴の加工を行い、交差部に残存するバリの大きさを測
定した。Example 1 The finishing dimension (hole diameter) of the first and second holes 1 and 2 is 6 mm, and the hole diameter d of the small diameter portion 1b of the first hole 1 to be drilled first, that is, the removal allowance δ by the tool 10 is 0. Was varied in various ways from 0.5 to 0.55 mm, the intersection hole was machined by the procedure shown in the above embodiment (FIG. 1), and the size of the burr remaining at the intersection was measured.
【００１８】図４は、その結果を示したもので、除去代
δが０、すなわち第１の穴１の全長を工具８により最初
から仕上寸法Ｄに加工した場合は、第２の穴２の加工で
生じたバリ４がそのまま残ってしまうことが分かった。
一方、除去代δを設定した場合でも、その除去代δが0.
1mm と著しく小さい場合は、むしろバリが拡大する現象
が見られた。これは、除去代が小さいため、工具１０に
よる加工に際してせん断現象が起こらず、新たなバリが
発生したためと推定される。また、除去代δを0.25mmか
ら0.55mm範囲に設定した場合は、何れもバリの除去効果
が認められるが、除去代δが0.4mm の場合にバリの残存
はほとんど認められず、バリ除去に著しく効果的にある
ことが分かった。これより、第１の穴１の小径部１ｂの
穴径ｄは、除去代δ＝0.4mm を中心に、小さくてもδ＝
0.25mm、大きくてもδ＝0.55mmとなる範囲（0.25〜0.55
mm）に設定するのが望ましいといえる。FIG. 4 shows the result. When the removal allowance δ is 0, that is, when the entire length of the first hole 1 is machined to the finishing dimension D from the beginning with the tool 8, the second hole 2 is removed. It was found that the burrs 4 generated by the processing remained as they were.
On the other hand, even when the removal allowance δ is set, the removal allowance δ is 0.
In the case of extremely small size of 1 mm, the phenomenon that the burr was expanded rather was observed. This is presumed to be due to the fact that the removal margin is small, so that the shearing phenomenon does not occur during processing by the tool 10 and new burrs are generated. In addition, when the removal allowance δ was set in the range of 0.25 mm to 0.55 mm, the effect of removing burrs was observed in all cases. It was found to be remarkably effective. From this, the hole diameter d of the small diameter portion 1b of the first hole 1 is set to be at least δ = 0.4 mm around the removal allowance δ = 0.4 mm.
0.25mm, at most δ = 0.55mm range (0.25-0.55
mm) is desirable.
【００１９】実施例２ 第１および第２の穴１、２の仕上寸法（穴径）を６mmと
し、先に開ける第１の穴１の小径部１ｂの穴径ｄを仕上
径の−0.8mm （除去代δ＝0.4mm ）に設定し、上記した
ガイド部１４を有する工具１０と、このようなガイド部
を有しない汎用の工具とを用いて前記小径部１ｂを仕上
加工し、その加工に際して第１の穴１に対する工具の芯
ズレ量を測定して、それぞれ統計値（平均値、バラツ
キ）を求めた。なお、測定数ｎは１０である。Embodiment 2 The finishing dimension (hole diameter) of the first and second holes 1 and 2 is 6 mm, and the hole diameter d of the small diameter portion 1b of the first hole 1 to be drilled first is -0.8 mm of the finishing diameter. (Removal allowance δ = 0.4 mm), the small-diameter portion 1b is finish-processed using the tool 10 having the above-described guide portion 14 and a general-purpose tool not having such a guide portion. The amount of misalignment of the tool with respect to the first hole 1 was measured, and statistical values (average value, variation) were obtained. The number of measurements n is 10.
【００２０】図５は、その結果を示したもので、ガイド
部１４を有する工具１０を用いた場合は、該ガイド部を
有しない工具を用いた場合に比べて、芯ズレ量の平均
値、バラツキ（標準偏差）共に著しく小さくなってい
る。芯ズレ量が小さいということは、少ない除去代でも
小径部１ｂの穴内面を均等に削除できることを意味して
おり、これにより、例えば除去代δとして上記した理想
の値δ＝0.4mm を設定して、安全かつ確実にバリ除去を
行うことができるようになる。FIG. 5 shows the results. In the case where the tool 10 having the guide portion 14 is used, the average value of the amount of misalignment is larger than the case where the tool 10 having no guide portion is used. The variation (standard deviation) is significantly reduced. The small amount of misalignment means that the hole inner surface of the small-diameter portion 1b can be evenly removed with a small removal allowance. Thus, for example, the above-described ideal value δ = 0.4 mm is set as the removal allowance δ. As a result, it is possible to safely and reliably remove burrs.
【００２１】[0021]
【発明の効果】以上、説明したように、本発明にかゝる
交差穴加工方法によれば、二つの穴の交差部に生じるバ
リを穴開け工程内で確実に除去できるので、別途、特別
のバリ取り工程を設ける必要がなくなり、生産性の向上
および製造コストの低減に大きく寄与するものとなる。
また、本発明にかゝる穴加工用工具によれば、先端にガ
イド部を設けるだけの簡単な構成で芯ズレを大幅に低減
することができ、穴内面を均等に削除することが可能に
なって、上記交差穴加工方法の実施に向けて好適とな
る。As described above, according to the method for machining a crossed hole according to the present invention, burrs generated at the intersection of two holes can be reliably removed in the drilling process. This eliminates the need to provide a deburring step, which greatly contributes to an improvement in productivity and a reduction in manufacturing cost.
Further, according to the drilling tool according to the present invention, it is possible to greatly reduce the misalignment with a simple configuration in which only the guide portion is provided at the tip, and it is possible to evenly delete the inner surface of the hole. Thus, the method is suitable for implementing the above-described cross hole processing method.
【図１】本発明にかゝる交差穴加工方法を順を追って示
す断面図である。FIG. 1 is a cross-sectional view showing a cross hole drilling method according to the present invention in order.
【図２】本発明にかゝる穴加工用工具の形状を示す正面
図である。FIG. 2 is a front view showing a shape of a hole drilling tool according to the present invention.
【図３】図２のＢ−ＢおよびＣ−Ｃ矢視線に沿う断面図
である。FIG. 3 is a sectional view taken along arrows BB and CC in FIG. 2;
【図４】第１の穴を仕上加工する際の除去代と残存バリ
の大きさとの関係を示すグラフである。FIG. 4 is a graph showing the relationship between the removal allowance and the size of remaining burrs when finishing the first hole.
【図５】第１の穴を仕上加工する際の芯ずれ量に及ぼす
工具種類の影響を示すグラフである。FIG. 5 is a graph showing the effect of the type of tool on the amount of misalignment when finishing the first hole.
【図６】本発明の加工対象の一つであるクランク軸とこ
れに加工される交差穴を示す正面図である。FIG. 6 is a front view showing a crankshaft, which is one of the processing objects of the present invention, and a cross hole to be processed therein;
【図７】図６のＡ−Ａ矢視線に沿う断面図である。FIG. 7 is a sectional view taken along the line AA of FIG. 6;
【図８】従来の交差穴加工方法を順を追って示す断面図
である。FIG. 8 is a cross-sectional view showing a conventional method of forming a cross hole in order.
１ 第１の穴、 １ａ 大径部、 １ｂ 小径部 ２ 第２の穴 ３ 油穴（交差穴） ４ バリ ８，８′ 第１の穴加工用工具 ９ 第２の穴加工用工具 １０ 第１の穴の小径部加工用工具、 １４ 工具の
ガイド部DESCRIPTION OF SYMBOLS 1 1st hole, 1a large diameter part, 1b small diameter part 2 2nd hole 3 Oil hole (crossing hole) 4 Burr 8,8 '1st hole drilling tool 9 2nd hole drilling tool 10 1st Tool for machining small diameter part of hole, 14 Guide part of tool
Claims (3)
加工方法において、先に加工する第１の穴の、少なくと
も第２の穴との交差部分を、所定の仕上寸法より小径に
形成し、第２の穴を加工した後、前記第１の穴を所定の
仕上寸法に仕上加工することを特徴とする交差穴加工方
法。1. A cross hole machining method for cutting two intersecting holes, wherein at least an intersection of the first hole to be machined with the second hole is formed to have a diameter smaller than a predetermined finishing dimension. Forming a second hole, and then finishing the first hole to a predetermined finish size.
加工方向に見て、該第２の穴が第１の穴に対して鈍角に
交差する側から工具を進入させることを特徴とする請求
項１に記載の交差穴加工方法。2. When finishing a first hole, a tool is inserted from a side where the second hole intersects the first hole at an obtuse angle when viewed in a processing direction of the second hole. The method of claim 1, wherein:
法の実施に用いる工具であって、先端部に、穴の小径部
分に嵌入可能なガイド部を設けたことを特徴とする穴加
工用工具。3. A tool used for carrying out the method for drilling a cross hole according to claim 1, wherein a guide portion which can be fitted into a small-diameter portion of the hole is provided at a tip end portion. Tools.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20384097A JP3546915B2 (en) | 1997-07-14 | 1997-07-14 | Cross drilling method and drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20384097A JP3546915B2 (en) | 1997-07-14 | 1997-07-14 | Cross drilling method and drilling tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1133807A true JPH1133807A (en) | 1999-02-09 |
| JP3546915B2 JP3546915B2 (en) | 2004-07-28 |
Family
ID=16480579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20384097A Expired - Fee Related JP3546915B2 (en) | 1997-07-14 | 1997-07-14 | Cross drilling method and drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3546915B2 (en) |
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| JP2007146955A (en) * | 2005-11-28 | 2007-06-14 | Nissin Kogyo Co Ltd | Caliper body for vehicular disc brake |
| JP2008018485A (en) * | 2006-07-12 | 2008-01-31 | Komatsu Machinery Corp | Deburring method and device |
| US7328495B2 (en) * | 1999-02-19 | 2008-02-12 | Joda Enterprises, Inc. | Method and apparatus for registering a torque-transmitting tool in a fixture and for forming a diagonal bore in the tool |
| CN102179541A (en) * | 2011-05-10 | 2011-09-14 | 大足县生产力促进中心 | Intersection cross hole processing method |
| KR101090662B1 (en) * | 2008-06-13 | 2011-12-07 | 한라공조주식회사 | Forming method of center hole of shaft for compressor |
| CN102335769A (en) * | 2010-07-16 | 2012-02-01 | 上海汇大机械制造有限公司 | Method and tool for processing precast hole with circumferential incomplete hole wall |
| CN102642114A (en) * | 2012-04-10 | 2012-08-22 | 中信重工机械股份有限公司 | Machining method of perpendicularly intersected hole system of speed reducer body |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7328495B2 (en) * | 1999-02-19 | 2008-02-12 | Joda Enterprises, Inc. | Method and apparatus for registering a torque-transmitting tool in a fixture and for forming a diagonal bore in the tool |
| JP4713318B2 (en) * | 2005-11-28 | 2011-06-29 | 日信工業株式会社 | Caliper body for disc brakes for vehicles |
| JP2007146955A (en) * | 2005-11-28 | 2007-06-14 | Nissin Kogyo Co Ltd | Caliper body for vehicular disc brake |
| JP2008018485A (en) * | 2006-07-12 | 2008-01-31 | Komatsu Machinery Corp | Deburring method and device |
| KR101090662B1 (en) * | 2008-06-13 | 2011-12-07 | 한라공조주식회사 | Forming method of center hole of shaft for compressor |
| CN102335769A (en) * | 2010-07-16 | 2012-02-01 | 上海汇大机械制造有限公司 | Method and tool for processing precast hole with circumferential incomplete hole wall |
| CN102179541A (en) * | 2011-05-10 | 2011-09-14 | 大足县生产力促进中心 | Intersection cross hole processing method |
| CN102642114A (en) * | 2012-04-10 | 2012-08-22 | 中信重工机械股份有限公司 | Machining method of perpendicularly intersected hole system of speed reducer body |
| CN102642114B (en) * | 2012-04-10 | 2014-08-06 | 中信重工机械股份有限公司 | Machining method of perpendicularly intersected hole system of speed reducer body |
| CN102921987A (en) * | 2012-11-05 | 2013-02-13 | 河北华北柴油机有限责任公司 | Fine deep hole machining burr preventing method |
| CN103231211A (en) * | 2013-04-12 | 2013-08-07 | 长春航空液压控制有限公司 | Finish machining method of thin-wall rocker sleeve |
| FR3015323A1 (en) * | 2013-12-20 | 2015-06-26 | Snecma | METHOD OF FORMING AN ANGULAR PIPE IN A PART FORMING A BEARING SUPPORT |
| CN105081676A (en) * | 2014-05-05 | 2015-11-25 | 太仓海嘉车辆配件有限公司 | Double-clutch eccentric oil through processing method and corresponding double-clutch blank |
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