JP2845888B2 - Rounding method of bending part in bending hole - Google Patents
Rounding method of bending part in bending holeInfo
- Publication number
- JP2845888B2 JP2845888B2 JP63114889A JP11488988A JP2845888B2 JP 2845888 B2 JP2845888 B2 JP 2845888B2 JP 63114889 A JP63114889 A JP 63114889A JP 11488988 A JP11488988 A JP 11488988A JP 2845888 B2 JP2845888 B2 JP 2845888B2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- bent
- bending
- rounding
- cutting edge
- 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.)
- Expired - Fee Related
Links
Landscapes
- Milling Processes (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は屈曲穴の屈曲部を丸め加工する方法に関し、
マシニングセンタやNCボール盤などによる加工に好適で
ある。The present invention relates to a method of rounding a bent portion of a bent hole,
Suitable for machining with a machining center or NC drilling machine.
＜従来の技術＞ 油圧機器などにおいて要素部材中に流体通路を形成さ
せる場合にはキリなどを用いた切削加工が一般に用いら
れるが、この流体通路は設計上の必要から屈曲させるこ
とが多いため、屈曲部の加工が問題となっていた。<Conventional technology> When a fluid passage is formed in an element member in a hydraulic device or the like, cutting using a drill or the like is generally used. However, since this fluid passage is often bent due to design necessity, Processing of the bent portion has been a problem.
第７図，第８図には90゜の屈曲角を有する屈曲穴01が
形成されたアルミニウムブロック02の平面と第７図中Ａ
−Ａ断面のそれぞれ設計要求形状を示してある。これら
の図に示されたように、屈曲穴01の屈曲部03は流体が流
れる際の圧力損失を生じさせない様に滑らかに形成する
ことが設計上望まれている。FIGS. 7 and 8 show the plane of the aluminum block 02 in which the bending hole 01 having the bending angle of 90 ° is formed, and A in FIG.
The design required shape of each of the -A cross sections is shown. As shown in these figures, it is desired in design that the bent portion 03 of the bent hole 01 be formed smoothly so as not to cause a pressure loss when a fluid flows.
しかし、キリのみを用いた加工では充分な通路面積を
確保しようとすると第９図に示すような形状にすること
しかできなかった。そして、第８図のような形状にする
場合には、キリ加工の後屈曲部03に放電加工や手作業を
施したり、分割して加工したものを溶接によって接合す
る方法などがとられていた。However, in processing using only a drill, it was only possible to make the shape as shown in FIG. 9 in order to secure a sufficient passage area. In the case of forming the shape as shown in FIG. 8, a method of applying electric discharge machining or manual work to the bent portion 03 after the drilling, or joining the divided portions by welding is adopted. .
＜発明が解決しようとする課題＞ ところが、放電加工により第８図の形状にするために
は加工工具（放電電極）の形状が複雑になると共に必要
電極数も多くなり、加工コストや工具製作工数などが多
大となる。また、アルミニウム系の素材の場合、放電加
工では面粗度，形状が共に不良となる欠点もあった。<Problems to be Solved by the Invention> However, in order to obtain the shape shown in FIG. 8 by electric discharge machining, the shape of the machining tool (discharge electrode) becomes complicated and the number of necessary electrodes increases, and the machining cost and the number of man-hours for manufacturing the tool are increased. And so on. Further, in the case of an aluminum-based material, there is also a defect that both the surface roughness and the shape become defective in electric discharge machining.
一方、手作業はハンドグラインダなどによって行うの
であるが、正確な形状に仕上げることが難しく、また作
業者の技能に個人差があるため、均一な製品を造ること
ができなかった。On the other hand, manual work is performed with a hand grinder or the like, but it is difficult to finish the shape accurately, and since there is an individual difference in the skill of the worker, a uniform product cannot be manufactured.
そして、溶接による方法では流体通路を流れる流体が
高圧である場合などには接合部の全周を開先溶接する必
要があり、加工工数とコストが多大となると共に溶接設
備も必要となっていた。And, in the method by welding, when the fluid flowing through the fluid passage is at a high pressure, it is necessary to perform groove welding on the entire periphery of the joint, which requires a large number of processing steps and costs, and also requires welding equipment. .
本発明は以上述べた従来の加工方法が有する問題点を
解消することを目的とする。An object of the present invention is to solve the problems of the conventional processing method described above.
＜課題を解決するための手段＞ そこで、本発明では素材中に形成された屈曲穴におけ
る屈曲部の丸め加工方法であって、前記屈曲穴とほぼ同
径の球型刃先を有するカッタを前記屈曲穴内に挿入し、
シャンクを前記屈曲穴の直線部と平行に維持したまま
で、当該球型刃先を回転させつつ前記屈曲部において円
弧状に移動させて切削加工を行うと共に、前記球型刃先
の円弧状の移動軌跡を屈曲角の二等分線に沿って移動さ
せることにより切削範囲を順次変更してゆくことを特徴
とする屈曲穴における屈曲部の丸め加工方法を提案する
ものである。<Means for Solving the Problems> Accordingly, the present invention relates to a method of rounding a bent portion in a bent hole formed in a material, wherein the cutter having a spherical cutting edge having substantially the same diameter as the bent hole is bent. Insert into the hole,
While the shank is kept parallel to the straight portion of the bent hole, the spherical cutting edge is rotated and moved in an arc shape in the bent portion while cutting is performed, and the arc-shaped movement locus of the spherical cutting edge is performed. The present invention proposes a method for rounding a bent portion in a bent hole, characterized in that the cutting range is sequentially changed by moving the cutting line along the bisector of the bending angle.
＜作用＞ シャンクを屈曲穴の直線部と平行に維持したままで、
球型刃先を回転させつつ屈曲部において円弧状に移動し
ながら切削加工を行う一方、円弧状の移動軌跡が屈曲角
の二等分線に沿って移動し、平滑かつ精度の高い丸め加
工を行う。<Operation> While maintaining the shank parallel to the straight part of the bending hole,
While the cutting process is performed while rotating the spherical cutting edge in an arc shape at the bending portion, the arc-shaped movement trajectory moves along the bisector of the bending angle to perform smooth and accurate rounding. .
＜実 施 例＞ 図面を用いて本発明の一実施例を具体的に説明する。<Embodiment> An embodiment of the present invention will be specifically described with reference to the drawings.
第１図には本実施例に係る丸め加工方法を表す屈曲部
の拡大断面を、第２図には第１図Ｂ−Ｂ断面をそれぞれ
示してある。また、第３図〜第６図には本実施例におけ
る屈曲穴の加工手順を断面により示してある。FIG. 1 shows an enlarged cross section of a bent portion showing a rounding method according to the present embodiment, and FIG. 2 shows a cross section taken along the line BB of FIG. FIG. 3 to FIG. 6 are cross-sectional views showing a procedure of forming a bent hole in this embodiment.
第３図に示したものは屈曲穴形成の第一工程たる下穴
加工であり、アルミニウムブロック１にキリ２によって
上方と側方から二つの下穴3,4が明けられる。この際、
キリ２の刃部先端2aが直交する下穴4,3の中心線4a,3aと
一致した位置で加工が停止される。尚、この下穴加工を
含め本実施例における加工はすべて単一のマシニングセ
ンタ（図示せず）によって行われる。FIG. 3 shows a pilot hole processing as a first step of forming a bent hole, and two pilot holes 3 and 4 are drilled from the upper side and the lateral side of the aluminum block 1 by the drill 2. On this occasion,
Machining is stopped at a position where the blade tip 2a of the drill 2 coincides with the center lines 4a, 3a of the prepared holes 4, 3 orthogonal to each other. In addition, all the processing in this embodiment including the preparation of the prepared hole is performed by a single machining center (not shown).
次に、第４図に示すように一方の下穴（本実施例の場
合は上方の下穴３）から下穴とほぼ同径のボールエンド
ミル５を挿入し、屈曲穴形成の第二工程を行う。これ
は、下穴3,4の接続部すなわち屈曲部６の外周側の余肉
７を除去するためである。Next, as shown in FIG. 4, a ball end mill 5 having substantially the same diameter as the pilot hole is inserted through one pilot hole (the upper pilot hole 3 in the present embodiment), and the second step of forming a bent hole is performed. Do. This is for removing the excess portion 7 on the outer peripheral side of the connecting portion of the pilot holes 3 and 4, that is, the bent portion 6.
第二工程が終了すると、第５図に示すように下穴３と
ほぼ同径の球型刃先８をシャンク９の先端に形成したカ
ッタ10が下穴３に挿入されて第三工程たる本発明に係る
屈曲部６の丸め加工が開始される。以下、第１図，第２
図を用いてその加工手順を説明する。When the second step is completed, as shown in FIG. 5, a cutter 10 having a spherical cutting edge 8 having substantially the same diameter as the prepared hole 3 formed at the tip of the shank 9 is inserted into the prepared hole 3, and the third step of the present invention is performed. Is started. Hereinafter, FIG. 1 and FIG.
The processing procedure will be described with reference to the drawings.
まず、第１図に示す屈曲部６の内周側に形成する円弧
11の半径Ｒを求める。円弧11の半径Ｒは流体の流動抵抗
を考えるとなるべく大きいほうがよいのだが、工具形状
などによってその大きさは自ずと定ってしまう。DCとDS
をそれぞれ球型刃先８とシャンク９の直径とし、CL,θ
をそれぞれシャンク９と下穴の最小許容隙間，屈曲角と
おくと、下式が得られる。First, an arc formed on the inner peripheral side of the bent portion 6 shown in FIG.
The radius R of 11 is obtained. The radius R of the arc 11 is preferably as large as possible in consideration of the flow resistance of the fluid, but the size is naturally determined by the shape of the tool and the like. DC and DS
Are the diameters of the spherical cutting edge 8 and the shank 9, respectively, and CL, θ
Are defined as the minimum allowable gap and the bending angle between the shank 9 and the pilot hole, respectively, the following equation is obtained.
したがって、例えばDC＝16,DS＝8.2,CL＝0.3,θ＝90
゜とすればＲ≦4.29となる。そして、この円弧11を形成
する際の球型刃先８の移動軌跡R1の半径はＲ＋DC/2とな
る。 Therefore, for example, DC = 16, DS = 8.2, CL = 0.3, θ = 90
If ゜, R ≦ 4.29. Then, the radius of the movement locus R 1 of spherical cutting edges 8 when forming the arc 11 becomes R + DC / 2.
次に、屈曲角θの二等分線12に沿って外周方向の送り
を与え、再び円弧状に切削を行う。その際の移動軌跡R2
の半径は送りの量をｘとすると、 となる。すなわち、球型刃先８の移動軌跡が常に下穴３
の中心線3aと接するように設定するのである。いうまで
もなく、これらの演算制御はマシニングセンタの制御部
たる図示しない制御装置によって行われる。Next, feed in the outer peripheral direction is given along the bisector 12 of the bending angle θ, and cutting is performed again in an arc shape. The movement trajectory R 2 at that time
The radius of the feed is x, Becomes That is, the movement locus of the spherical cutting edge 8 is always
Is set so as to be in contact with the center line 3a. Needless to say, these arithmetic controls are performed by a control device (not shown) which is a control unit of the machining center.
以下、R3,R4,…Rnまで順次ｎ回の送りを与えて、丸め
加工を行う。送りの回数ｎは任意に設定可能であり、仕
上がり精度と加工工数を勘案して定められる。例えば、
第２図において破線で示した部分が第三工程で除去すべ
き余肉13であるが、R1で殆んどの部分が除去されるた
め、R2以降の送りを与えなくとも性能上満足できるので
あればそれでもよい。Thereafter, rounding is performed by sequentially feeding n times to R 3 , R 4 ,..., R n . The number n of times of feeding can be set arbitrarily, and is determined in consideration of finishing accuracy and man-hours. For example,
While the portion indicated by broken lines in FIG. 2 is a excess thickness 13 to be removed in the third step, which part is removed N殆in R 1, satisfactory performance without giving R 2 and subsequent feeding If so, that is fine.
上方の下穴３からの丸め加工が終了したら、第６図に
示すようにアルミニウムブロック１を回転させ、側方の
下穴４からカッタ10を挿入して同様に丸め加工を行う。When the rounding from the upper pilot hole 3 is completed, the aluminum block 1 is rotated as shown in FIG. 6, and the cutter 10 is inserted from the lateral pilot hole 4 to perform the same rounding.
以上述べたように本実施例では下穴加工から屈曲部の
丸め加工まで単一のマシニングセンタにより行われるた
め、高精度の屈曲穴が短時間かつ低コストで形成できる
ようになった。As described above, in this embodiment, since a single machining center performs the processing from the preparation of the prepared hole to the rounding of the bent portion, a highly accurate bent hole can be formed in a short time and at low cost.
尚、本発明はこの実施例に限るものではなく、例えば
マシニングセンタに換えてNCボール盤などを用いてもよ
いし、第二工程におけるボールエンドミル５に換えて前
記カッタ10を用いることにより、工具交換回数を少なく
するようにしてもよい。また、本実施例では屈曲角が90
゜の場合を例としたが、本発明における屈曲角はこれに
限るものではなく、鈍角の場合には一方の下穴からのみ
の丸め加工も可能となることもある。The present invention is not limited to this embodiment. For example, an NC drilling machine or the like may be used instead of the machining center, or the number of tool changes by using the cutter 10 instead of the ball end mill 5 in the second step. May be reduced. In this embodiment, the bending angle is 90.
Although the case of と し た is taken as an example, the bending angle in the present invention is not limited to this, and in the case of an obtuse angle, rounding from only one prepared hole may be possible.
＜発明の効果＞ 本発明によれば、シャンクを屈曲穴の直線部と平行に
維持したままで、球型刃先を回転させつつ屈曲部におい
て円弧状に移動しながら切削加工を行うと共に、その円
弧状の移動軌跡が屈曲角の二等線分に沿って移動するた
め、マシニングセンタやNCボール盤などに適用した場
合、高精度の屈曲穴が短時間かつ低コストで加工できる
ようになる。<Effects of the Invention> According to the present invention, while the shank is maintained parallel to the straight portion of the bent hole, the cutting process is performed while rotating the spherical cutting edge while moving in an arc shape at the bent portion, and the circle is formed. Since the arc-shaped movement trajectory moves along the bisector of the bending angle, when applied to a machining center, an NC drilling machine, etc., a highly accurate bent hole can be machined in a short time and at low cost.
第１図は本発明に係る丸め加工方法の一実施例を示す屈
曲部の拡大断面図であり、第２図は第１図中Ｂ−Ｂ断面
図である。そして、第３図〜第６図は当該実施例におけ
る屈曲穴の加工手順を示す断面図である。 また、第７図と第８図はそれぞれ屈曲穴を有するアルミ
ニウムブロックの設計要求形状を示す平面図と第７図中
Ａ−Ａ断面図であり、第９図は従来の加工形状の一例を
示す断面図である。 図中、 １はアルミニウムブロック、 ２はキリ、 3,4は下穴、 ５はボールエンドミル、 ６は屈曲部、 ８は球型刃先、 10はカッタ、 12は屈曲角の二等分線である。FIG. 1 is an enlarged sectional view of a bent portion showing one embodiment of a rounding method according to the present invention, and FIG. 2 is a sectional view taken along line BB in FIG. FIGS. 3 to 6 are cross-sectional views showing a procedure for processing a bent hole in this embodiment. 7 and 8 are a plan view showing a design required shape of an aluminum block having a bent hole and a sectional view taken along line AA in FIG. 7, respectively. FIG. 9 shows an example of a conventional processed shape. It is sectional drawing. In the figure, 1 is an aluminum block, 2 is a drill, 3 and 4 are prepared holes, 5 is a ball end mill, 6 is a bent portion, 8 is a spherical cutting edge, 10 is a cutter, and 12 is a bisector of a bending angle. .
Claims (1)
の丸め加工方法であって、前記屈曲穴とほぼ同径の球型
刃先を有するカッタを前記屈曲穴内に挿入し、シャンク
を前記屈曲穴の直線部と平行に維持したままで、当該球
型刃先を回転させつつ前記屈曲部において円弧状に移動
させて切削加工を行うと共に、前記球型刃先の円弧状の
移動軌跡を屈曲角の二等分線に沿って移動させることに
より切削範囲を順次変更してゆくことを特徴とする屈曲
穴における屈曲部の丸め加工方法。1. A method for rounding a bent portion in a bent hole formed in a material, wherein a cutter having a spherical cutting edge having substantially the same diameter as the bent hole is inserted into the bent hole, and the shank is bent. While maintaining parallel to the straight portion of the hole, while performing the cutting process by rotating the spherical cutting edge in an arc shape at the bending portion while rotating, the arc-shaped movement trajectory of the spherical cutting edge is determined by the bending angle. A method for rounding a bent portion in a bent hole, wherein a cutting range is sequentially changed by moving the cutting range along a bisector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63114889A JP2845888B2 (en) | 1988-05-13 | 1988-05-13 | Rounding method of bending part in bending hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63114889A JP2845888B2 (en) | 1988-05-13 | 1988-05-13 | Rounding method of bending part in bending hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01289611A JPH01289611A (en) | 1989-11-21 |
| JP2845888B2 true JP2845888B2 (en) | 1999-01-13 |
Family
ID=14649190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63114889A Expired - Fee Related JP2845888B2 (en) | 1988-05-13 | 1988-05-13 | Rounding method of bending part in bending hole |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2845888B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114932256A (en) * | 2022-06-29 | 2022-08-23 | 中国航发动力股份有限公司 | Multi-curvature hole edge rounding method and equipment under limitation of part structure |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101848402B1 (en) * | 2010-06-28 | 2018-04-12 | 노다 가나가타 유겐가이샤 | Fabricating method of material |
| JP5717020B1 (en) * | 2013-07-31 | 2015-05-13 | 野田金型有限会社 | Elbow manufacturing method |
| DE102014012279B3 (en) * | 2014-08-22 | 2015-08-20 | Gea Tds Gmbh | Manifold for a shell-and-tube heat exchanger for large product pressures, fabrication methods for a shell and tube heat exchanger having such a manifold, and use of a shell-and-tube heat exchanger for high product pressures with such a manifold in an atomization dryer |
| CN110508850A (en) * | 2019-09-16 | 2019-11-29 | 哈尔滨汽轮机厂有限责任公司 | Porous processing method on a kind of ring body thin-wall part |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5410148B2 (en) * | 1974-05-11 | 1979-05-01 | ||
| JPS62271616A (en) * | 1986-05-20 | 1987-11-25 | Yamanashi Seiki Kk | Manufacture of pipe joint |
-
1988
- 1988-05-13 JP JP63114889A patent/JP2845888B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114932256A (en) * | 2022-06-29 | 2022-08-23 | 中国航发动力股份有限公司 | Multi-curvature hole edge rounding method and equipment under limitation of part structure |
| CN114932256B (en) * | 2022-06-29 | 2023-09-19 | 中国航发动力股份有限公司 | Multi-curvature hole edge rounding processing method and equipment under part structure limitation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01289611A (en) | 1989-11-21 |
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| LAPS | Cancellation because of no payment of annual fees |