JPS6121773B2 - - Google Patents
Info
- Publication number
- JPS6121773B2 JPS6121773B2 JP1748582A JP1748582A JPS6121773B2 JP S6121773 B2 JPS6121773 B2 JP S6121773B2 JP 1748582 A JP1748582 A JP 1748582A JP 1748582 A JP1748582 A JP 1748582A JP S6121773 B2 JPS6121773 B2 JP S6121773B2
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- reamer
- chamfer
- blade
- shank
- 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
Links
- 238000005520 cutting process Methods 0.000 claims description 42
- 238000010586 diagram Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000010730 cutting oil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D77/00—Reaming tools
Description
【発明の詳細な説明】
この発明は、被加工物の裏面からリーマ加工す
るに用いるリーマに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reamer used for reaming a workpiece from the back side.
従来、被加工物の裏面から座ぐりあるいは中ぐ
り加工する場合には、第１図に示すようにバイト
３等の切削工具をスピンドル４に取付け、ブロツ
クゲージ等を使用して、この取付寸法が所定の公
差内にあることを確認してから前記スピンドル４
を機械側の主軸５に装着し、更にこの装着寸法が
所定の公差内にあることを常法により確認してか
ら試めし削りをし、試めし削りの結果が良好であ
ることを確認してから切削加工を開始するように
しなければならなかつた。 Conventionally, when counterboring or boring from the back side of a workpiece, a cutting tool such as a cutting tool 3 is attached to the spindle 4 as shown in Fig. 1, and a block gauge or the like is used to check the installation dimensions. After confirming that it is within the predetermined tolerance, the spindle 4
is attached to the main shaft 5 on the machine side, and after confirming by the usual method that the attached dimensions are within the specified tolerance, trial cutting is performed, and the result of trial cutting is confirmed to be good. I had to start cutting from this point.
ところで、この従来の被加工物の裏面からの切
削加工においては、切削加工すべき穴径が小さい
場合にはスピンドル４の直径を小さくしなければ
ならなず、従つて切削加工時にスピンドル４に振
れが発生して正確な加工が出来ないという欠点が
あつた。 By the way, in this conventional cutting process from the back side of the workpiece, if the diameter of the hole to be cut is small, the diameter of the spindle 4 must be made small, and therefore the spindle 4 has to be deflected during the cutting process. The disadvantage was that accurate machining was not possible due to the occurrence of
そこで、本発明の技術的課題は、前記欠点をな
くすために前記のスピンドルの振れを防止する点
にあり、この技術的課題を解決するための本発明
の技術的手段は、縦切刃を形成したリーマランド
にシヤンク側へ拡径するようにテーパを附し、リ
ーマランドのシヤンク側端面にチヤムフアと該チ
ヤムフアにつづいて逃げを形成するとともに前記
チヤムフアに前記縦切刃に連なる食付刃を形成し
てなるリーマにある。 Therefore, the technical problem of the present invention is to prevent the spindle from wobbling in order to eliminate the drawbacks, and the technical means of the present invention to solve this technical problem is to form a vertical cutting edge. The reamed land is tapered so as to expand in diameter toward the shank side, and a chamfer is formed on the shank side end surface of the reamed land, and a relief is formed following the chamfer, and a chamfered edge is formed in the chamfer that is continuous with the vertical cutting edge. It is in the reamer.
該リーマを使用した被加工物の裏面からのリー
マ加工にあつては、まず前記の食付刃が被加工物
の裏面の被加工部位に良好に食付き、また、該リ
ーマはその呼び径に相当する円筒、正確にはシヤ
ンク側へ拡径する円錐台の外周面に多数の切刃が
配設されている処から例えリーマシヤンクが細く
ても切削が加工すべき穴の軸心に対し軸対称に作
用するので前記した振れを解消できるのである。 When reaming from the back side of a workpiece using this reamer, first, the biting blade bites into the part to be machined on the back side of the workpiece well, and the reamer is reamed to its nominal diameter. Even if the reaming shank is thin, the cutting is axially symmetrical with respect to the axis of the hole to be machined because many cutting edges are arranged on the outer circumferential surface of the corresponding cylinder, more precisely a truncated cone whose diameter expands toward the shank. Therefore, the above-mentioned runout can be eliminated.
以下、本発明の技術的手段の一実施例を第２
図、第３図を用いて説明する。 Hereinafter, a second embodiment of the technical means of the present invention will be described.
This will be explained using FIG.
先ず構成を説明すると、６はリーマで、７はそ
のシヤンク部、８は縦切刃である。 First, to explain the structure, 6 is a reamer, 7 is its shank portion, and 8 is a vertical cutting edge.
７ａはシヤンク部７に設けられたキー溝であつ
て、リーマ６は固定ねじ９によつて機械側の主軸
５に固定されている。 7a is a keyway provided in the shank portion 7, and the reamer 6 is fixed to the main shaft 5 on the machine side by a fixing screw 9.
１０は、リーマランドのシヤンク側端面にチヤ
ムフアを形成し、該チヤムフアに前記縦切刃８に
連なるように形成した食付刃である。即ち食付刃
８はリーマ１を構成する前記縦切刃８にそれぞれ
連続して設けられており、また縦切刃８には、第
２図においてその下端から上端に至る全長にわた
つて、シヤンク７側に延びるに従つて該縦切刃８
を含む円筒が拡径するようなテーパを付してあ
る。 Reference numeral 10 denotes a chamfer blade in which a chamfer is formed on the shank side end surface of the reamer land, and the chamfer is formed so as to be continuous with the vertical cutting blade 8. That is, the biting blades 8 are provided continuously with the vertical cutting blades 8 constituting the reamer 1, and the vertical cutting blades 8 have a shank over the entire length from the lower end to the upper end in FIG. The vertical cutting edge 8 extends toward the 7 side.
The cylinder containing the cylinder is tapered to expand in diameter.
ｂは切刃１０の切刃逃げ角で、ａはリーマラン
ドによる被加工物１１の下穴１４の座面１４ａに
対するカジリを防ぐための座面逃げ角で、食付刃
１０から内方へ向つて凹所即ち逃げ１２を形成す
る如く設けられている。 b is the cutting edge relief angle of the cutting edge 10, and a is the bearing surface relief angle to prevent galling of the prepared hole 14 of the workpiece 11 against the bearing surface 14a by the reamer land, and It is provided so as to form a recess or relief 12.
次に作用を説明する。 Next, the action will be explained.
リーマ６を用いて被加工物１１の裏面１１ａか
らリーマ加工する前に、下穴加工をバイト削りに
より行なう。すなわち、リーマ６の削り代分だけ
小さい内径に下穴１４を切削できるような寸法に
バイト１３をバイトホルダ４に取付け、第３図(1)
に示すように所定の深さＨまで切削する。 Before reaming the back surface 11a of the workpiece 11 using the reamer 6, a pilot hole is drilled by cutting with a cutting tool. That is, the cutting tool 13 is attached to the cutting tool holder 4 in such a size that the pilot hole 14 can be cut to a smaller inner diameter by the cutting allowance of the reamer 6, and as shown in FIG. 3 (1).
Cut to a predetermined depth H as shown in .
次に皿もみ加工を行なう。すなわち、上記のよ
うに切削された被加工物１１の下穴１４の入口を
第３図(2)に示すように皿もみ用バイト１５によつ
て所定深さｈの皿もみを行なう。このようにして
下穴加工と皿もみ加工をした後にリーマ６を主軸
５に装着して下穴１４に対してリーマ加工を前記
裏面から行う。この際、リーマ６の食付刃１０を
上記皿もみ部に食付かせて主軸５を回転しつつ機
械送りによつて上昇させるにつれて切削が進行
し、座面１４ａに食付刃１０が当接するに至つ
て、下穴１４に対するリーマ加工が所定の精度で
完了する。 Next, perform the countersunking process. That is, the entrance of the prepared hole 14 of the workpiece 11 cut as described above is countersunk to a predetermined depth h using a countersunk tool 15 as shown in FIG. 3(2). After the pilot hole machining and countersunk machining are performed in this manner, the reamer 6 is attached to the main shaft 5, and the pilot hole 14 is reamed from the back side. At this time, cutting progresses as the chamfer blade 10 of the reamer 6 bites into the countersunk portion and is raised by mechanical feed while rotating the main shaft 5, and the chamfer blade 10 comes into contact with the seat surface 14a. At this point, reaming of the prepared hole 14 is completed with a predetermined accuracy.
ちなみに、この実施例におけるリーマの寸法諸
元は呼び径25mm、刃数は８枚、縦切刃８の全長は
40mmであり、また前記の食付刃１０の切刃逃げ角
ｂは３゜に、座面逃げ角ａは１゜に、また図示し
ない軸線に直角な断面におけるランド部の逃げ角
は８゜に形成する。縦切刃８のテーパは第２図に
おいて上端にて直径D1＝25０ − 0.005mmφ、
下端にて直径D2＝25−０．０１５ −０．０２０mm〓にな
るように設
け、チヤムフアはC0.4mmに形成し、リーマ６に
よる削り代は被加工物の材質FC25に対して0.05
mmであつて、第３図(3)の矢印Ａに示すように所定
の切削油例えば活性硫化塩化油を供給しつつ切削
速度５ｍ／分、送り0.5mm／revの切削条件でリー
マ通しを行なつた処、食付性も良く、仕上面アラ
サと寸法精度も良好であつた。 By the way, the dimensions of the reamer in this example are nominal diameter 25 mm, number of blades 8, and total length of vertical cutting blade 8.
40 mm, and the cutting edge relief angle b of the chamfering blade 10 is 3 degrees, the seat relief angle a is 1 degree, and the relief angle of the land portion in a cross section perpendicular to the axis (not shown) is 8 degrees. Form. The taper of the vertical cutting blade 8 has a diameter D 1 = 25-0.005 mmφ at the upper end and a diameter D 2 = 25-0.005 mmφ at the lower end in FIG. 015-0 . 020 mm〓, the chamfer is formed to C0.4 mm, and the cutting allowance by reamer 6 is 0.05 for the material of the workpiece, FC25.
mm, and as shown by arrow A in Figure 3 (3), reaming is carried out under the cutting conditions of a cutting speed of 5 m/min and a feed rate of 0.5 mm/rev while supplying a predetermined cutting oil such as activated sulfurized chloride oil. When ripe, the bite was good, and the finished surface roughness and dimensional accuracy were also good.
また、上記寸法諸元と同様な諸元でチヤムフア
のみC1mmの寸法として被削材料をSS４１に変更
して同様なリーマ加工をした処、結果は良好であ
り、切粉の排出も矢印Ｂで示すように良好になさ
れた。 In addition, when similar reaming was performed with the same dimensions as above, only the chamfer was changed to C1 mm, and the work material was changed to SS41, the results were good, and the discharge of chips is also shown by arrow B. So well made.
尚、縦切刃８のテーパは前記寸法諸元にのみ拘
束されるものではなく、縦切刃８の長さ100mmmm
につき通常は0.01〜0.02mmを採用でき、被削材が
延性に富む時はこの値を２倍程度迄大きくするの
がよい。 Note that the taper of the vertical cutting blade 8 is not limited only to the above dimensions; the length of the vertical cutting blade 8 is 100mmmm.
Normally, a value of 0.01 to 0.02 mm can be adopted, and when the work material is highly ductile, this value should be increased to about twice that.
更にまた説明は省略したが、手持工具用のもの
としても前記諸元を設定できること明らかであ
る。 Furthermore, although the explanation is omitted, it is clear that the above specifications can be set for a hand-held tool as well.
以上説明したように、本発明によればその構成
を、縦切刃を形成したリーマランドにシヤンク側
へ拡径するようにテーパを付し、リーマランドの
シヤンク側端面にチヤムフアと該チヤムフアにつ
づいて逃げをそれぞれ形成するとともに、前記チ
ヤムフアに前記縦切刃に連なる食付刃を形成して
なるリーマとしたため、前記の食付刃が被加工物
の裏面の被加工部位に良好に食付き、また、該リ
ーマはその呼び径に相当する円筒、精確にはシヤ
ンク側へ拡径する円錐台の外周面に多数の切刃が
配設されている処から例えリーマシヤンクが細く
ても切削力が加工すべき穴の軸心に対し軸対称に
作用するので切削時における振れを解消できたと
いう効果を奏する。 As explained above, according to the present invention, the configuration is such that a reamer land having a vertical cutting edge is tapered so as to expand in diameter toward the shank side, and a chamfer is formed on the end surface of the reamer land on the shank side, and a chamfer is formed on the end face of the reamer land on the shank side. Since the reamer is formed by forming a recess at each side and a chamfering blade connected to the vertical cutting blade on the chamfer, the chamfering blade bites into the machined part on the back side of the workpiece well, In addition, the reamer has a cylinder corresponding to its nominal diameter, more precisely, a truncated cone whose diameter expands toward the shank, and many cutting edges are arranged on the outer circumferential surface of the reamer, so even if the reamer shank is thin, the cutting force can be reduced Since it acts axially symmetrically with respect to the axis of the hole to be cut, it has the effect of eliminating vibration during cutting.
更にまた、このように被加工物の裏面からリー
マ加工を行うことと他種の一連の加工とをトラン
スフアマシン列によつて組み合せて行なう場合に
あつては、前記のリーマ加工のために被加工物を
天地逆転させる必要がなくなつたので、工順設定
の自由度を大きくすることができ、総じて裏面加
工における段取り性や加工能率、および加工精度
を向上し得たものである。 Furthermore, when performing reaming from the back side of the workpiece in combination with a series of other types of processing using a transfer machine row, it is possible to Since it is no longer necessary to turn the workpiece upside down, it is possible to increase the degree of freedom in setting the process order, and as a whole, the setup efficiency, processing efficiency, and processing accuracy in back surface processing can be improved.
第１図は従来の手段の概略説明図、第２図は本
発明に係る実施例の要部断面説明図、第３図は本
発明の実施例の作用説明図である。
７……シヤンク、８……縦切刃、１０……食付
刃、１１ａ……被加工物の裏面、１２……逃げ、
１４……下穴、ａ……座面逃げ角、ｂ……切刃１
０の切刃逃げ角。
FIG. 1 is a schematic explanatory diagram of a conventional means, FIG. 2 is a sectional explanatory diagram of a main part of an embodiment according to the present invention, and FIG. 3 is an explanatory diagram of the operation of an embodiment of the present invention. 7... Shank, 8... Vertical cutting blade, 10... Biting blade, 11a... Back side of workpiece, 12... Relief,
14... Pilot hole, a... Seat relief angle, b... Cutting edge 1
Cutting edge clearance angle of 0.
Claims (1)
へ拡径するようにテーパを附し、リーマランドの
シヤンク側端面に、チヤムフアと、前記縦切刃に
連なるように該チヤムフアに形成した食付刃と、
この食付刃の逃げ角及び下穴座面に対する逃げ角
とを備えたことを特徴とするリーマ。1. A reamed land with a vertical cutting edge is tapered so as to expand in diameter toward the shank side, and a chamfer is formed on the shank side end surface of the reamed land, and a chamfered edge is formed on the chamfer so as to be continuous with the vertical cutting blade. and,
A reamer characterized by having a relief angle of the biting blade and a relief angle with respect to the prepared hole seating surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1748582A JPS58137521A (en) | 1982-02-08 | 1982-02-08 | Reamer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1748582A JPS58137521A (en) | 1982-02-08 | 1982-02-08 | Reamer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58137521A JPS58137521A (en) | 1983-08-16 |
| JPS6121773B2 true JPS6121773B2 (en) | 1986-05-28 |
Family
ID=11945298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1748582A Granted JPS58137521A (en) | 1982-02-08 | 1982-02-08 | Reamer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58137521A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008023814B4 (en) | 2008-05-15 | 2010-04-01 | Kennametal Inc. | Zugreibahle |
| DE102008025962A1 (en) | 2008-05-30 | 2009-12-03 | Kennametal Inc. | reamer |
| JP6170322B2 (en) * | 2013-04-01 | 2017-07-26 | 川崎重工業株式会社 | Reamer tool |
| JP6071707B2 (en) * | 2013-04-01 | 2017-02-01 | 川崎重工業株式会社 | Drilling tool and its drilling method |
-
1982
- 1982-02-08 JP JP1748582A patent/JPS58137521A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58137521A (en) | 1983-08-16 |
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