JPH0451283B2 - - Google Patents
Info
- Publication number
- JPH0451283B2 JPH0451283B2 JP22549487A JP22549487A JPH0451283B2 JP H0451283 B2 JPH0451283 B2 JP H0451283B2 JP 22549487 A JP22549487 A JP 22549487A JP 22549487 A JP22549487 A JP 22549487A JP H0451283 B2 JPH0451283 B2 JP H0451283B2
- Authority
- JP
- Japan
- Prior art keywords
- cam
- tool
- center
- axis
- cutter
- 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
- 238000000034 method Methods 0.000 claims description 16
- 238000003754 machining Methods 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000007514 turning Methods 0.000 description 9
- 238000007517 polishing process Methods 0.000 description 7
- 238000003672 processing method Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
Landscapes
- Milling Processes (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はカム加工方法に関し、特に施削工作機
械における卵形カムの加工方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for machining a cam, and more particularly to a method for machining an egg-shaped cam in a cutting machine tool.
カム外周の輪郭曲線の削成法としては、手仕上
げ法，創成法，ならい法および数値制御による方
法等種々挙げられる。そして、諸条件を考慮して
最も適合した削成法を選択する訳であるが、軸部
を有する卵形カムのようなワークの場合、工程集
約的メリツトより施削工作機械を使用し数値制御
により、しかもサイドカツターによる方法では加
工時の干渉が多いので、エンドミルによる方法に
よつて削成していた。
There are various methods for cutting the contour curve of the cam's outer circumference, such as a manual finishing method, a generation method, a tracing method, and a method using numerical control. The most suitable machining method is selected by considering various conditions, but in the case of a workpiece such as an egg-shaped cam with a shaft, a machining machine tool is used due to the process-intensive advantage, and numerical control is used. Moreover, since the method using a side cutter caused a lot of interference during machining, the method using an end mill was used for cutting.
この場合、第２図イ，ロに示すようにチヤツク
Ｃに把持された卵形カムの回転中心Ｐは、工具で
あるカツターの軸心の延長線上にあるように、つ
まりカツターが常にカム中心に対して垂直である
ように、カツターを挿着した回転工具を割出して
固定していた。そしてその後で、チヤツクＣを介
してカムを回転させ同時にカツターをＸ軸方法に
制御しながらカム外周の輪郭曲線を削成してい
た。 In this case, as shown in Figure 2 A and B, the rotation center P of the oval cam held by the chuck C is on the extension of the axis of the cutter, that is, the cutter is always centered on the cam. A rotary tool with a cutter inserted was indexed and fixed so that it was perpendicular to the cutter. After that, the cam was rotated via the chuck C, and at the same time the cutter was controlled in the X-axis direction to cut the contour curve of the cam's outer circumference.
しかし、カムの回転中心とカツター中心とを結
んだ状態でカムを回転させ加工を進める従来の方
法によれば、削り残り部が多くて、加工後に行な
う研磨加工において１回の研磨では無理な加工し
かできなかつた。即ち、第２図イ，ロに示すよう
にカツターをＸ軸方向に制御しながらカムを矢印
S1方向に回転させると、あたかもカツターがカム
外周上を順に移動するかのような軌跡を描くので
あるが、カム外周上を刻々と位置を変えるカツタ
ーはその中心が常に回転中心Ｐを向いているの
で、カツターの刃がカム外周に当接する位置がポ
イント毎に変化してしまう。
However, with the conventional method of machining by rotating the cam while connecting the center of rotation of the cam and the center of the cutter, there is a large amount of uncut material, making it impossible to perform polishing in one polishing process after machining. There was nothing I could do. That is, as shown in Figure 2 A and B, while controlling the cutter in the X-axis direction, move the cam in the direction of the arrow.
S When rotated in one direction, the cutter draws a trajectory as if it were moving sequentially on the outer circumference of the cam, but as the cutter changes its position on the outer circumference of the cam every moment, its center always faces the center of rotation P. Because of this, the position where the cutter blade contacts the cam's outer circumference changes from point to point.
今、カム回転中心Ｐの垂直方向（Ｘ軸方向）に
カツター中心T1を位置させその接点をK1とし、
カム外周上の任意の位置でカツター中心とカム回
転中心Ｐとを結ぶ接点をそれぞれK2，K3……K7
とする。そして接点K1を加工開始点とする。K1，
K2，K3の接点においては、カツター中心T1がカ
ム外周面と垂直に接していてカツター中心で切削
を行なつているが、カム外周が円形から楕円形状
に移つて行くK4，K5，K6の接点においては、カ
ツター中心はカム外周面に対して垂直に接するこ
とができず、カツターの外周部Taで切削するこ
とになる。つまりカム外周面に対して斜め方向か
ら切削して行くためにカム外周面は第２図ロのよ
うな円弧状に削られた状態になり、カム外周面の
両側が盛り上つたように残つてしまう。即ちａで
示される如く設定値に対し大きな量の未加工部が
残つてしまう。従つて、この残つた部分は後加工
として行なう研磨加工において１回の研磨では無
理である。そのため研磨加工に多くの時間をとら
れてしまい、生産性向上を阻害していた。 Now, position the cutter center T 1 in the vertical direction (X-axis direction) of the cam rotation center P, and make its contact point K 1 .
The contact points connecting the cutter center and the cam rotation center P at any position on the cam outer circumference are K 2 , K 3 ...K 7 respectively.
shall be. Then, the contact point K1 is set as the processing start point. K1 ,
At the contact point of K 2 and K 3 , the cutter center T 1 is in perpendicular contact with the cam outer circumferential surface and cutting is performed at the cutter center, but at K 4 and K where the cam outer circumference changes from a circular shape to an elliptical shape. At the contact points of 5 and K6 , the center of the cutter cannot touch the outer peripheral surface of the cam perpendicularly, and cutting is performed at the outer peripheral part Ta of the cutter. In other words, since cutting is performed diagonally to the cam's outer circumferential surface, the cam's outer circumferential surface is cut into an arc shape as shown in Figure 2 (b), and both sides of the cam's outer circumferential surface remain as if raised. Put it away. That is, as shown by a, a large amount of unprocessed portion remains compared to the set value. Therefore, it is impossible to polish this remaining portion once in the polishing process performed as a post-process. As a result, a lot of time was taken up in the polishing process, which hindered productivity improvement.
本発明は、上記事情に鑑み提案されたものでそ
の目的は、上記問題点を解決し削り残りを少なく
し、１回の研磨加工でカム外周を仕上げることの
できる程度に近似楕円形を削成可能な、生産効率
の高い旋削加工機械におけるカムの加工方法を提
供することにある。 The present invention was proposed in view of the above-mentioned circumstances, and its purpose is to solve the above-mentioned problems, reduce the amount of uncut material, and grind an approximate ellipse to the extent that the outer periphery of the cam can be finished with one polishing process. It is an object of the present invention to provide a method for machining a cam in a turning machine that is possible and has high production efficiency.
本発明は上記問題点を解決するために、回転自
在で且つＣ軸方向（主軸の回転方向）を制御され
る主軸に連結したチヤツクがあつて、該チヤツク
に対向してセンタを装着した心押し台が設けら
れ、該心押し台近傍に設けられたＸ軸（主軸軸線
を横切る垂直）方向およびＺ軸（主軸軸線）方向
移動可能な刃物台等から成る旋削工作機械におい
て、前記チヤツクでカムの一方の端部を把持し、
対向するカムの他端を前記心押し台のセンタで支
持し、前記刃物台に装着された回転工具装置の工
具をその工具中心線の延長線が、カム外周上に垂
線を立てカム外周上の任意の位置からの垂線を集
束して得られる仮想基準サークル上に接するよう
にオフセツトして固定し、前記カムの回転制御に
沿つて工具を順次Ｘ軸方向に制御しながらカム外
周面を加工することを特徴とする旋削工作機械に
おけるカム加工方法とした。
In order to solve the above problems, the present invention provides a tailstock having a chuck connected to a main shaft which is rotatable and whose C-axis direction (rotation direction of the main shaft) is controlled, and a center mounted opposite to the chuck. In a turning machine tool, the chuck is provided with a turret, etc. that is movable in the X-axis (perpendicular to the spindle axis) direction and the Z-axis (spindle axis) direction, which is provided near the tailstock. Grasp one end and
The other end of the opposing cam is supported at the center of the tailstock, and the tool of the rotary tool device mounted on the tool post is set such that the extension line of the tool center line is perpendicular to the cam outer periphery. The cam is offset and fixed so as to be in contact with a virtual reference circle obtained by converging perpendicular lines from arbitrary positions, and the outer circumferential surface of the cam is machined while sequentially controlling the tool in the X-axis direction in accordance with the rotation control of the cam. This is a cam machining method for turning machine tools that is characterized by the following.
以下、本発明の一実施例を図面に基づいて更に
詳細に説明する。
Hereinafter, one embodiment of the present invention will be described in more detail based on the drawings.
まず、第３図において卵形カムを加工する旋削
工作機械について説明する。 First, referring to FIG. 3, a turning machine tool for machining an egg-shaped cam will be explained.
１は回転自在の主軸であり、この主軸１にはチ
ヤツク２が固着されている。そして、チヤツク２
先端の爪３によつて卵形カム４（以後カムと呼称
する。）の一方の軸部４ａを把持している。一方、
チヤツク２に対向した位置にはＺ軸方向に移動可
能な心押し台５が設けられ、この心押し台５に装
着されたセンタ６によつてカムの他方の軸端を支
持している。 1 is a rotatable main shaft, and a chuck 2 is fixed to this main shaft 1. And check 2
One shaft portion 4a of an egg-shaped cam 4 (hereinafter referred to as cam) is gripped by the claw 3 at the tip. on the other hand,
A tailstock 5 movable in the Z-axis direction is provided at a position facing the chuck 2, and a center 6 mounted on the tailstock 5 supports the other shaft end of the cam.
前記心押し台５の上部には、複数の回転工具や
旋削工具を前面円周上に等配し、割出し可能な刃
物台７が設けられる。この刃物台７は割出しの
外、更にＺ軸方向，Ｘ軸方向にNC制御によつて
移動可能であり、カムはＣ軸方向（主軸の回転方
向）にNC制御される。 An indexable tool rest 7 is provided above the tailstock 5, in which a plurality of rotary tools and turning tools are equally distributed on the front circumference. This tool rest 7 can be moved in the Z-axis direction and the X-axis direction under NC control in addition to indexing, and the cam is NC-controlled in the C-axis direction (rotation direction of the main shaft).
本発明においては、前記刃物台７に挿着される
回転工具装置８の工具であるカツター９を水平方
向にオフセツト可能としたものを用いてカム加工
を行なつている。この回転工具装置については同
一出願人が既に出願した「位置調整可能な回転工
具装置・実願昭62−92548号」に開示されている
ので詳細な説明は省略する。 In the present invention, cam processing is performed using a cutter 9, which is a tool of a rotary tool device 8 inserted into the tool rest 7, which can be offset in the horizontal direction. This rotary tool device has been disclosed in ``Position Adjustable Rotary Tool Device - Utility Application No. 1982-92548'' filed by the same applicant, so a detailed explanation will be omitted.
上記のような構成の旋削工作機械を用いてカム
外周を加工する方法を示したものが第１図であ
る。その加工方法を説明すると、チヤツク２の爪
３でカム４の一方の軸端４ａを把持し、他端４ｂ
を心押し台５のセンタ６で支持する。次いで、刃
物台７に挿着した回転工具装置８のカツター９の
中心T1を、そのカム外周上に垂線を立て、カム
外周上の任意の位置からの垂線を集束して得られ
た半径ｒから成る仮想基準サークルＤ上に合致さ
せるようにオフセツトして固定する。このオフセ
ツト量は近似的に求められる。即ち第１図の側で
いえばr2とr4の接点をａ，r4とr3の接点をｂとし
た場合、ａ，ｂの２等分点をＣとし、r4の中心点
Ｏとの線COから中心線Ｐへの垂直距離をオフ
セツト量とする。そして、カム回転中心Ｐの垂直
方向（Ｘ軸方向）上にカツター９を平行に、しか
もカム外周面に垂直に当接した接点をL1としこ
のL1を加工開始点とする。 FIG. 1 shows a method for machining the outer periphery of a cam using a turning machine tool configured as described above. To explain the processing method, grip one shaft end 4a of the cam 4 with the claw 3 of the chuck 2, and hold the other end 4b of the cam 4.
is supported by the center 6 of the tailstock 5. Next, the center T1 of the cutter 9 of the rotary tool device 8 inserted in the tool rest 7 is set at a radius r obtained by drawing a perpendicular line on the cam outer circumference and converging the perpendicular lines from arbitrary positions on the cam outer circumference. It is offset and fixed so that it coincides with the virtual reference circle D consisting of. This offset amount can be determined approximately. In other words, on the side of Figure 1, if the point of contact between r 2 and r 4 is a, and the point of contact between r 4 and r 3 is b, then the bisecting point of a and b is C, and the center point O of r 4 is Let the vertical distance from the line CO to the center line P be the offset amount. Then, the contact point where the cutter 9 is parallel to the cam rotation center P in the direction perpendicular to it (X-axis direction) and in contact perpendicularly to the outer peripheral surface of the cam is defined as L1 , and this L1 is defined as the processing start point.
後はカムを矢印S2方向にNC制御で回転させ、
回転工具装置８のカツター９をNC制御によつて
Ｘ軸方向に制御して接点L6までのカム外周旋削
加工を行なう。接点L0までの加工が終了したら、
カツター９をl1からl2のラインまで2rだけオフセ
ツトしてから、同様にカム４を回転させ加工終了
点L7まで加工する。 After that, rotate the cam in the two directions of arrow S using NC control.
The cutter 9 of the rotary tool device 8 is controlled in the X-axis direction by NC control to perform cam outer circumferential turning up to the contact point L6 . After completing the machining up to contact L 0 ,
After offset the cutter 9 by 2r from the line l1 to l2 , rotate the cam 4 in the same way and process until the machining end point L7 .
このように本実施例によれば、カム外周面上の
任意の位置でカツター９がカム外周面に対してほ
ぼ垂直に当接しているため、カツター９がほとん
ど水平状態で切削することができる。その結果、
実際に加工して計測した削り残り部Ａ，Ｂ，Ｅが
図１で示すように少なくなつた。これは、仮想基
準サークルＤとカツター９中心とを常に結んだ状
態で加工すれば、卵形カム外周に極めて近い近似
楕円が得られると言うこうである。そして図１で
示される量は、その後の研磨加工による１回の研
磨で加工できる量である。 As described above, according to this embodiment, the cutter 9 is in contact with the cam outer circumferential surface substantially perpendicularly at any position on the cam outer circumferential surface, so that cutting can be performed with the cutter 9 in an almost horizontal state. the result,
The uncut portions A, B, and E, which were actually measured during machining, decreased as shown in FIG. 1. This means that if the virtual reference circle D and the center of the cutter 9 are always connected during processing, an approximate ellipse that is extremely close to the outer circumference of the egg-shaped cam can be obtained. The amount shown in FIG. 1 is the amount that can be processed in one polishing process in the subsequent polishing process.
以上説明したように本発明によれば、カム回転
に際して工具がカム外周上の任意の点で常にカム
外周面に対して垂直に当接して切削するため、カ
ム外周の輪郭曲線に合致する程の近似楕円を得る
ことができる。このため後加工である研磨加工に
おいて、一回の研磨で仕上加工することができ、
生産効率の高い旋削工作機械におけるカム加工方
法を提供することが可能となつた。
As explained above, according to the present invention, when the cam rotates, the tool always cuts perpendicularly to the cam outer circumferential surface at any point on the cam outer circumference. An approximate ellipse can be obtained. Therefore, in the polishing process that is the post-processing, finishing can be done with one polishing.
It has become possible to provide a cam processing method for turning machine tools with high production efficiency.
第１図は本発明のカム加工方法を示し、第２図
イは従来のカム加工法例を示し、第２図ロは同イ
における−線断面図を示し、第３図はカムと
カムを加工する旋削工作機械との相関図を示す。
図面において、１……主軸、２……チヤツク、
３……爪、４……卵形カム、５……心押し台、６
……センタ、７……刃物台、８……回転工具装
置、９……カツター（工具）、T1……カツター中
心、Ｄ……仮想基準サークル。
Fig. 1 shows the cam processing method of the present invention, Fig. 2 A shows an example of the conventional cam processing method, Fig. 2 B shows a cross-sectional view taken along the - line in Fig. 3, and Fig. 3 shows the cam and the cam processing method. A correlation diagram with turning machine tools is shown. In the drawing, 1... main shaft, 2... chuck,
3...Claw, 4...Oval cam, 5...Tailstock, 6
...Center, 7...Turret, 8...Rotary tool device, 9...Cutter (tool), T1 ...Cutter center, D...Virtual reference circle.
Claims (1)
を制御される主軸に連結したチヤツクがあつて、
該チヤツクに対向してセンタを装着した心押し台
が設けられ、該心押し台近傍に設けられたＸ軸
（主軸軸線を横切る垂直）方向およびＺ軸（主軸
軸線）方向移動可能な刃物台等から成る施削工作
機械において、前記チヤツクでカムの一方の端部
を把持し、対向するカムの他端を前記心押し台の
センタで支持し、前記刃物台に挿着された回転工
具装置の工具をその工具中心線の延長線が、カム
外周上に垂線を立てカム外周上の任意の位置から
の垂線を集束して得られる仮想基準サークル上に
接するようにオフセツトして固定し、前記カムの
回転制御に沿つて工具を順次Ｘ軸方向に制御しな
がらカム外周面を加工することを特徴とする施削
工作機械におけるカム加工方法。1. Freely rotatable and in the C-axis direction (direction of rotation of the main shaft)
There is a chuck connected to the main shaft that is controlled.
A tailstock equipped with a center is provided opposite to the chuck, and a turret etc. is provided near the tailstock and is movable in the X-axis (perpendicular to the spindle axis) direction and the Z-axis (spindle axis) direction. A cutting machine tool comprising: one end of the cam is gripped by the chuck, the other end of the opposing cam is supported by the center of the tailstock, and a rotary tool device inserted into the tool rest is mounted. The tool is offset and fixed so that an extension of the tool center line touches a virtual reference circle obtained by placing a perpendicular line on the cam outer circumference and converging perpendicular lines from arbitrary positions on the cam outer circumference, and A cam machining method for a cutting machine tool, characterized in that the outer circumferential surface of the cam is machined while sequentially controlling a tool in the X-axis direction in accordance with the rotation control of the cam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22549487A JPS6471607A (en) | 1987-09-09 | 1987-09-09 | Cam machining method in turning machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22549487A JPS6471607A (en) | 1987-09-09 | 1987-09-09 | Cam machining method in turning machine tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6471607A JPS6471607A (en) | 1989-03-16 |
| JPH0451283B2 true JPH0451283B2 (en) | 1992-08-18 |
Family
ID=16830198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22549487A Granted JPS6471607A (en) | 1987-09-09 | 1987-09-09 | Cam machining method in turning machine tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6471607A (en) |
-
1987
- 1987-09-09 JP JP22549487A patent/JPS6471607A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6471607A (en) | 1989-03-16 |
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