JP2774760B2 - Centerless grinding device for stepped workpiece and grinding method - Google Patents
Centerless grinding device for stepped workpiece and grinding methodInfo
- Publication number
- JP2774760B2 JP2774760B2 JP5161542A JP16154293A JP2774760B2 JP 2774760 B2 JP2774760 B2 JP 2774760B2 JP 5161542 A JP5161542 A JP 5161542A JP 16154293 A JP16154293 A JP 16154293A JP 2774760 B2 JP2774760 B2 JP 2774760B2
- Authority
- JP
- Japan
- Prior art keywords
- diameter portion
- grinding wheel
- grinding
- small
- peripheral speed
- 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 - Lifetime
Links
Landscapes
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、同心状の大径部と小径
部とを有する段付き形状の加工物をセンターレス研削す
る装置、および、同じくセンターレス研削する方法に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for centerless grinding a stepped workpiece having a large diameter portion and a small diameter portion which are concentric.
【０００２】[0002]
【従来の技術】図６は段付円柱状の加工物１をセンター
レス研削する装置の従来例を示し、（Ａ）は模式的に描
いた平面図、（Ｂ）は同じく正面図である。加工物１に
大径部と小径部とが有るので、これに合わせて研削砥石
２にも調整砥石３にもそれぞれ大径部と小径部とが設け
られている。加工物１はブレード４によって支持され、
調整砥石３の大径部と研削砥石２の大径部が加工物１の
小径部に摺触して該小径部のセンターレス研削が行わ
れ、これと同時に調整砥石３の小径部と研削砥石２の小
径部が加工物１の大径部に摺触して該大径部のセンター
レス研削が行われる。2. Description of the Related Art FIG. 6 shows a conventional example of a centerless grinding apparatus for a stepped cylindrical workpiece 1, in which (A) is a schematic plan view and (B) is a front view. Since the workpiece 1 has a large diameter portion and a small diameter portion, both the grinding wheel 2 and the adjustment grinding wheel 3 are provided with a large diameter portion and a small diameter portion, respectively. The workpiece 1 is supported by a blade 4,
The large-diameter portion of the adjusting wheel 3 and the large-diameter portion of the grinding wheel 2 slide on the small-diameter portion of the workpiece 1 to perform centerless grinding of the small-diameter portion, and at the same time, the small-diameter portion of the adjusting wheel 3 and the grinding wheel. The small-diameter portion 2 slides on the large-diameter portion of the workpiece 1 to perform centerless grinding of the large-diameter portion.
【０００３】[0003]
【発明が解決しようとする課題】図６について説明した
従来例のセンターレス研削装置においては、段付き加工
物の形状に合わせて段付きの一体形研削砥石と段付きの
一体形調整砥石が設けられているが、加工物の大径部研
削のための砥石周速調節と小径部研削のための砥石周速
調節とをそれぞれ独立に行うことができない。このた
め、段付き加工物の大径部と小径部との直径差に対応す
る砥石径の差が周速差を生じ、研削時に不安定要因を与
えることになる。特に、調整砥石は加工物の回転速度を
制御する部材であるため、加工物と調整砥石との間に滑
りを生じることは加工精度に悪影響を及ぼすので好まし
くない。本考案は上述の事情に鑑みて為されたもので、
段付き加工物の大径部と小径部とを同時に、かつ、高精
度でセンターレス研削できる技術を提供することを目的
とする。In the conventional centerless grinding apparatus described with reference to FIG. 6, a stepped integral grinding wheel and a stepped integral adjusting grinding wheel are provided according to the shape of a stepped workpiece. However, it is not possible to independently adjust the peripheral speed of the grinding wheel for grinding the large diameter portion of the workpiece and the peripheral speed of the grinding wheel for grinding the small diameter portion. For this reason, a difference in the diameter of the grindstone corresponding to the diameter difference between the large-diameter portion and the small-diameter portion of the stepped workpiece causes a peripheral speed difference, which gives an unstable factor during grinding. In particular, since the adjusting grindstone is a member that controls the rotational speed of the workpiece, slipping between the workpiece and the adjusting grindstone is not preferable because it adversely affects machining accuracy. The present invention has been made in view of the above circumstances,
It is an object of the present invention to provide a technique capable of simultaneously performing high-accuracy centerless grinding of a large-diameter portion and a small-diameter portion of a stepped workpiece.
【０００４】[0004]
【課題を解決するための手段】上記の目的を達成するた
めの本発明の構成を、その１実施例に対応する図１を参
照して説明すると、大径部用の研削砥石７と小径部用の
研削砥石８とを別体に構成するとともに、それぞれ駆動
手段１１，１２によって回転駆動し、それぞれの研削砥
石７，８の周速を互いに独立に制御し得るようにする。
かつ、大径部用の調整砥石９と小径部用の調整砥石１０
とを別体に構成するとともに、それぞれ駆動手段１３，
１４によって回転駆動し、それぞれの調整砥石９，１０
の周速を独立に制御し得るようにし、かつ、前記研削砥
石７，８および調整砥石９，１０の少なくとも何れか一
つを、その径方向および／または軸心方向に移動せしめ
る。この移動を連動せしめて制御することによって２個
所の円柱面を同時に研削したり、円柱面と円錐面とを同
時に研削したり、円柱面と回転面とを同時に研削したり
することができる。The construction of the present invention for achieving the above object will be described with reference to FIG. 1 corresponding to one embodiment. The grinding wheel 7 for a large diameter portion and the small diameter portion The grinding wheels 8 are separately formed, and are rotationally driven by driving means 11 and 12, respectively, so that the peripheral speeds of the respective grinding wheels 7 and 8 can be controlled independently of each other.
And adjust the grinding wheel 10 for the regulating wheel 9 and a small diameter portion for large diameter portion
And the driving means 13 and
14 to rotate the respective adjusting whetstones 9, 10
Is controlled independently, and at least one of the grinding wheels 7, 8 and the adjusting wheels 9, 10 is moved in the radial direction and / or the axial direction. Or simultaneously grinding a cylindrical surface of the two positions by controlling allowed conjunction with this movement, or grinding a cylindrical surface and a conical surface at the same time, Ru can or simultaneously grinding a cylindrical surface and the rotating surface.
【０００５】さらに、前記大径部用研削砥石および／又
は小径部用研削砥石を軸心方向および径方向に移動させ
ることにより、被加工物の大径部・小径部以外の第３の
円柱面（図示省略）を研削することもできる。Further, by moving the grinding wheel for the large diameter portion and / or the grinding wheel for the small diameter portion in the axial direction and the radial direction, the third cylindrical surface other than the large diameter portion and the small diameter portion of the workpiece is processed. (Not shown) can also be ground.
【０００６】[0006]
【作用】上記の構成によれば、大径部用の研削砥石およ
び調整砥石、並びに小径部用の研削砥石および調整砥石
のそれぞれについて、その周速を独立に制御することが
できるので、それぞれの砥石の周速を適宜所望のごとく
調節してセンターレス研削を行い得る。このため、図６
について説明した従来例のセンターレス研削装置におい
て不安定要因となっていた周速差を解消することがで
き、段付き加工物の大径部と小径部とを同時に高精度で
センターレス研削することができる。さらに、前記大径
部用の研削砥石および調整砥石、並びに小径部用の研削
砥石および調整砥石の少なくとも何れか一つを軸心方向
および／または径方向に移動させることによって、円柱
面に限らず円錐面その他の回転面を研削することもでき
る。 According to the above arrangement, the peripheral speed of each of the grinding wheel and the adjusting wheel for the large diameter portion and the grinding wheel and the adjusting wheel for the small diameter portion can be independently controlled. The centerless grinding can be performed by appropriately adjusting the peripheral speed of the grindstone as desired. Therefore, FIG.
It is possible to eliminate the peripheral speed difference which has become an instability factor in the conventional centerless grinding device described above, and to perform centerless grinding of the large diameter part and the small diameter part of the stepped workpiece at the same time with high accuracy. Can be. Furthermore, the large diameter
Grinding wheel and adjusting wheel for small section, and grinding for small diameter section
At least one of the whetstone and the adjustment whetstone is in the axial direction
And / or by moving radially,
It is also possible to grind conical surfaces and other rotating surfaces as well as surfaces
You.
【０００７】[0007]
【実施例】図１は本発明に係るセンターレス研削装置の
１実施例を示し、（Ａ）は概要的な平面図，（Ｂ）は概
要的な正面図である。段付き加工物１は（Ｂ）図に示す
ごとく、ブレード４によって下方から支持されている。
上記加工物１の大径部をセンターレス研削する研削砥石
７と、同じく調整砥石９とは（Ａ）図に示すごとく、そ
れぞれ駆動機構１１，１３によって相互に独立して回転
駆動される構造で、それぞれ任意所望の周速となるよう
に調節することができる。また前記段付き加工物１の小
径部をセンターレス研削する研削砥石８と、同じく調整
砥石１０とは、それぞれ駆動機構１２，１４によって独
立して回転駆動される構造で、それぞれ任意所望の周速
となるように調節することができる。本発明における砥
石の周速の調節は、単に研削砥石の使用に伴う減寸（摩
耗）を補正して一定の周速を維持するだけのものではな
く、研削砥石についても調整砥石についても、それぞれ
任意所望の周速となるよう、互いに独立に調節する。前
記の大径部用調整砥石９および小径部用調整砥石１０
は、それぞれ往復矢印ａ，ｂのように切り込み送りでき
るようになっている。上記のように調整砥石９，１０を
切り込み送り可能な構造とする代りに、大径部用の研削
砥石７および小径部用の研削砥石８をそれぞれ往復矢印
ａ′，ｂ′のごとく切り込み送り可能な構造としても良
い。上記のように構成された本実施例のセンターレス研
削装置によれば、１対の研削砥石７と調整砥石９との周
速が、それぞれ加工物１の大径部のセンターレス研削に
適正な周速となるように調節して該大径部を適正条件で
センターレス研削しつつ、これと併行して、１対の研削
砥石８と調整砥石１０との周速が、それぞれ加工物１の
小径部のセンターレス研削に適正な周速となるように調
節して該小径部を適正条件でセンターレス研削すること
ができる。上述のようにして大径部と小径部とをそれぞ
れ最適の周速でセンターレス研削することにより、大径
部，小径部ともに高精度でセンターレス研削することが
できる。すなわち、図６に示した従来例の装置について
説明したような、大径部と小径部との砥石の周速差に因
る不安定要因が解消され、段付き加工物の大径部と小径
部とを同時に、高精度でセンターレス研削することがで
きる。1 shows an embodiment of a centerless grinding apparatus according to the present invention, wherein (A) is a schematic plan view and (B) is a schematic front view. The stepped workpiece 1 is supported from below by a blade 4 as shown in FIG.
The grinding wheel 7 for centerless grinding the large-diameter portion of the workpiece 1 and the adjusting wheel 9 have a structure which is driven to rotate independently of each other by driving mechanisms 11 and 13 as shown in FIG. , Can be adjusted so as to have any desired peripheral speed. The grinding wheel 8 for centerless grinding the small diameter portion of the stepped workpiece 1 and the adjusting wheel 10 are also driven independently by driving mechanisms 12 and 14, respectively, and each has a desired peripheral speed. Can be adjusted to be The adjustment of the peripheral speed of the grindstone in the present invention is not merely to maintain a constant peripheral speed by correcting the reduction in size (wear) due to the use of the grinding wheel, but also for the grinding wheel and the adjusting wheel. Adjustments are made independently of each other so that any desired peripheral speed is achieved. The adjusting wheel 9 for the large diameter portion and the adjusting wheel 10 for the small diameter portion
Can be cut and fed as indicated by reciprocating arrows a and b, respectively. Instead of making the adjusting whetstones 9 and 10 cut and fed as described above, the grinding wheel 7 for the large diameter portion and the grinding wheel 8 for the small diameter portion can be cut and fed as shown by the reciprocating arrows a 'and b', respectively. It may be a simple structure. According to the centerless grinding apparatus of the present embodiment configured as described above, the peripheral speeds of the pair of grinding wheels 7 and the adjusting wheels 9 are suitable for centerless grinding of the large-diameter portion of the workpiece 1 respectively. In parallel with this, the peripheral speed of the pair of grinding wheels 8 and the adjusting wheel 10 is adjusted to the peripheral speed while centerless grinding the large diameter portion under appropriate conditions. By adjusting the peripheral speed to be appropriate for centerless grinding of the small diameter portion, the small diameter portion can be subjected to centerless grinding under appropriate conditions. By performing centerless grinding of the large diameter portion and the small diameter portion at the optimum peripheral speed as described above, both the large diameter portion and the small diameter portion can be subjected to centerless grinding with high accuracy. That is, the instability factor due to the difference in the peripheral speed of the grindstone between the large-diameter portion and the small-diameter portion as described with reference to the conventional apparatus shown in FIG. 6 is eliminated, and the large-diameter portion and the small-diameter The centerless grinding can be performed at the same time with high precision.
【０００８】図１に示した本実施例においては、小径部
用の調整砥石１０および研削砥石８を往復矢印ｃ，ｄの
ごとく軸心方向に往復移動せしめ得るように構成してあ
る。このように構成すると、このセンターレス研削装置
を整備する際、大径部用の砥石７，９から小径部用の砥
石８，１０を離間させることができるので、砥石交換作
業を容易に行うことができる。この作用，効果から容易
に理解できるように、大径部用の砥石９，７を往復矢印
ｃ′，ｄ′のように移動せしめ得るように構成しても同
様の効果（砥石交換容易）が得られる。本図１における
各砥石の軸心方向（往復矢印ｃ，ｃ′，ｄ，ｄ′）の移
動は砥石交換を容易ならしめるのみでなく、この構成に
より砥石を軸心方向に移動（トラバース）させて円錐面
を研削するなどの高度な研削作業も可能になる。これに
ついては図２，図３を参照して後述する。また、上記の
ごとく、砥石を軸心方向に移動せしめ得るように構成し
ておくと、センターレス研削すべき大径部と小径部とが
軸心方向に離間している形状の加工物をセンターレス研
削する場合に好適である。In this embodiment shown in FIG. 1, the adjusting grindstone 10 and the grinding grindstone 8 for the small diameter portion can be reciprocated in the axial direction as shown by the reciprocating arrows c and d. With this configuration, when the centerless grinding device is maintained, the grindstones 8 and 10 for the small-diameter portion can be separated from the grindstones 7 and 9 for the large-diameter portion. Can be. As can be easily understood from this operation and effect, the same effect (easy replacement of the grinding wheel) can be obtained even if the large-diameter portion grinding wheels 9 and 7 can be moved as shown by the reciprocating arrows c 'and d'. can get. The movement of each grinding wheel in the axial direction (reciprocating arrows c, c ', d, d') in FIG.
Also allows advanced grinding operations, such as grinding the more mobile the grinding wheel in the axial direction (traverse) and not by a conical surface. This will be described later with reference to FIGS. Further, as described above, if the grindstone is configured to be able to move in the axial direction, the workpiece having a shape in which the large-diameter portion and the small-diameter portion to be subjected to centerless grinding are separated in the axial direction is centered. It is suitable for less grinding.
【０００９】図２は前記実施例の改良例を示し、内燃機
関用バルブ３１のバルブステム３１ａの小径円柱面とバ
ルブフェース３１ｂの大径円錐面とを同時加工する例で
ある。本実施例では、加工物の大径部であるバルブフェ
ース３１ｂに対応する大径部用研削砥石７′を設けてあ
るが、大径部用の調整砥石は省略してある。小径部用研
削砥石８′を定位置で回転させつつ調整砥石１０′を矢
印ｂ方向に切り込み送りしてバルブステム３１ａの小径
円柱面をセンターレス研削する。そして、大径部用研削
砥石７′に軸心方向のトラバース（矢印Ｙ）と径方向の
切り込み（矢印Ｘ）とを同時に与える。該大径部用研削
砥石７′は、上記Ｙ方向成分とＸ方向成分とのベクトル
和Ｅ方向に移動しつつバルブフェース３１ｂを円錐面に
仕上げる。この場合、矢印Ｙ方向（軸心方向）の移動速
度および矢印Ｘ方向（径方向）の移動速度を一定に保つ
ことによって、その合成移動方向（矢印Ｅ）を直線状な
らしめることができ、さらに、Ｘ，Ｙそれぞれの方向の
移動速度の比を適宜に設定することにより、バルブフェ
ースの円錐面の頂角２θを所望のごとく調節することが
できる。FIG. 2 shows an improvement of the above embodiment, in which a small-diameter cylindrical surface of a valve stem 31a of a valve 31 for an internal combustion engine and a large-diameter conical surface of a valve face 31b are simultaneously processed. In the present embodiment, the valve shaft, which is the large diameter portion of the workpiece, is used.
A large diameter grinding wheel 7 'corresponding to the base 31b is provided.
However, the adjusting grindstone for the large diameter portion is omitted. While rotating the grinding wheel 8 'for small diameter portion at a fixed position, the adjusting grinding wheel 10' is cut in the direction of arrow b and fed to perform centerless grinding of the small diameter cylindrical surface of the valve stem 31a. Then, a traverse in the axial direction (arrow Y) and a cut in the radial direction (arrow X) are simultaneously applied to the large-diameter portion grinding wheel 7 '. The grinding wheel 7 'for the large diameter portion finishes the valve face 31b to a conical surface while moving in the direction E of the vector sum of the Y-direction component and the X-direction component. In this case, by keeping the moving speed in the arrow Y direction (axial direction) and the moving speed in the arrow X direction (radial direction) constant, the combined moving direction (arrow E) can be linearized. , X, and Y, the vertex angle 2θ of the conical surface of the valve face can be adjusted as desired by appropriately setting the ratio of the moving speeds in the respective directions.
【００１０】図示を省略するが、図２の改良例の更なる
応用例として、前記Ｘ方向の移動速度とＹ方向の移動速
度とを関連させながら可変制御することにより、例えば
回転放物面，回転楕円面，球面などの回転面（平面曲線
を、その平面上の軸の回りに回転せしめた軌跡として得
られる曲面）を研削することができる。図３は、本発明
装置を適用して構成したバルブ研削機である。斑点を付
して示した７′は大径部用研削砥石、８′は小径部用研
削砥石、１０′は調整砥石であって、それぞれ図２につ
いて説明した構成部分である。上記の調整砥石１０′
は、図１の実施例における小径部用の調整砥石１０に対
応する構成部材であって、本例（図３）においては大径
部用の調整砥石（図１における符号９）を省略してあ
る。本発明を実施する際、研削機の汎用性を高めるため
に、図３の構成に大径部用調整砥石を付加することもで
きる。Although not shown, as a further application example of the improved example of FIG. 2, by performing variable control while relating the moving speed in the X direction and the moving speed in the Y direction, for example, a paraboloid of revolution, A rotating surface such as a spheroid or a spherical surface (a curved surface obtained as a trajectory obtained by rotating a plane curve around an axis on the plane) can be ground. FIG. 3 shows a valve grinding machine configured by applying the apparatus of the present invention. 7 'is a grinding wheel for a large diameter portion, 8' is a grinding wheel for a small diameter portion, and 10 'is an adjustment grinding wheel, which are indicated by spots, and are the components described with reference to FIG. Adjustment whetstone 10 '
Is a constituent member corresponding to the adjustment grindstone 10 for the small diameter portion in the embodiment of FIG. 1, and in this example (FIG. 3), the adjustment grindstone for the large diameter portion (reference numeral 9 in FIG. 1) is omitted. is there. In practicing the present invention, a large-diameter portion adjusting grindstone may be added to the configuration of FIG. 3 in order to increase the versatility of the grinder.
【００１１】図３のバルブ研削機において、小径部用研
削砥石８′は小径部用研削砥石回転駆動モータ２０によ
り定位置で回転せしめられる。調整砥石１０′は調整砥
石回転駆動モータ２１によって回転せしめられるととも
に調整砥石切込モータ２２により径方向（Ｘ軸方向）に
移動せしめ得るようになっている。なお、本例において
は上記調整砥石１０′を調整砥石トラバースモータ２７
によって軸心方向（Ｙ軸方向）に移動せしめ得るように
構成してある。また、大径部用研削砥石７′も同様に、
大径部用研削砥石回転駆動モータ１７によって回転せし
められ、大径部用研削砥石トラバースモータ１８によっ
て軸心方向（Ｙ軸方向）に、大径部用研削砥石切込モー
タ１９により径方向（Ｘ軸方向）に移動せしめられる。
図示の１６は調整砥石用の単石ドレッサ，２３は調整砥
石手動ハンドルである。また、図示の１５は研削砥石用
のロータリドレッサ，２４はロータリドレスモータ，２
５はツーリング切込モータ，２６はツーリング・トラバ
ースモータである。 図４は本発明に係る段付き加工物
のセンターレス研削装置の、前記と異なる実施例であ
り、（Ａ）は図５に示した被加工物の大径部，小径部お
よび端面を研削している状態の平面図、（Ｂ）は上記大
径部，小径部以外の円柱面を研削している状態の平面図
である。図５は上記実施例における被加工物であって、
大径部φ2と、小径部φ1とフランジ状部と、上記大径
部，小径部以外の円柱面φ3とを有する多段軸状部材の
加工目標形状を示す側面図である。上記の目的物である
多段軸４１は、次の５種類の面を高精度で仕上げなけれ
ばならない部材である。 （イ） 直径寸法φ1の小径部円柱面（３個所） （ロ） 直径寸法φ2の大径部円柱面（２個所） （ハ） フランジ状部（径ψ4）の端面ｉおよび端面ｊ
（計２個所） （ニ） 上記大径部，小径部以外の、直径寸法φ3の円
柱面 上記以外の寸法、ψ1，ψ2，ψ3，ψ4については通常の
一般公差が許容される。このような多段軸４１（図５）
を研削仕上げするために構成した図５の実施例の装置
は、本質的には図１の構成と同様であって、研削砥石は
大径部用研削砥石７″と小径部用研削砥石８″とに分割
され、それぞれ独立して回転制御されるとともに、それ
ぞれ独立してＸ，Ｙ方向に送り制御されるようになって
おり、調整砥石は大径部用調整砥石９″と小径部用調整
砥石１０″とに分割され、それぞれ独立に回転制御，送
り制御できるが、本例においては上記両方の調整砥石
９″と１０″とを常に同一回転速度で回転駆動するとと
もに、同一速度でＸ軸方向に切込み送り駆動する。In the valve grinding machine shown in FIG. 3, the grinding wheel 8 'for the small diameter portion is rotated at a fixed position by a motor 20 for rotating the grinding wheel for the small diameter portion. The adjusting grindstone 10 ′ is rotated by an adjusting grindstone rotating drive motor 21 and can be moved in a radial direction (X-axis direction) by an adjusting grindstone cutting motor 22. In this embodiment, the adjusting wheel 10 'is connected to the adjusting wheel traverse motor 27.
It can be moved in the axial direction (Y-axis direction). Similarly, the grinding wheel 7 'for the large diameter portion is also
It is rotated by a large-diameter grinding wheel rotating drive motor 17, and is rotated in the axial direction (Y-axis direction) by a large-diameter grinding wheel traverse motor 18 and in a radial direction (X direction) by a large-diameter grinding wheel cutting motor 19. (Axial direction).
A reference numeral 16 denotes a single-stone dresser for an adjusting whetstone, and 23 denotes an adjusting whetstone manual handle. Further, 15 is a rotary dresser for a grinding wheel, 24 is a rotary dress motor, 2
5 is a tooling cut-in motor, and 26 is a tooling / traverse motor. 4A and 4B show another embodiment of the centerless grinding apparatus for a stepped workpiece according to the present invention which is different from the above. FIG. 4A shows the grinding of the large diameter portion, the small diameter portion and the end face of the workpiece shown in FIG. (B) is a plan view of a state in which a cylindrical surface other than the large diameter portion and the small diameter portion is ground. FIG. 5 shows the workpiece in the above embodiment,
It is a side view which shows the processing target shape of the multistage shaft-shaped member which has the large diameter part (phi) 2 , the small diameter part (phi) 1 , a flange-shaped part, and the cylindrical surface (phi) 3 other than the said large diameter part and a small diameter part. The multi-stage shaft 41 as the above object is a member for which the following five types of surfaces must be finished with high precision. (B) the end surface i and the end j of the small-diameter portion cylindrical surface of diameter phi 1 (3 points) (b) large-diameter portion cylindrical surface of diameter phi 2 (2 points) (c) the flange-shaped portion (diameter [psi 4)
(A total of two locations) (d) the large-diameter portion, other than the small diameter portion, ordinary general tolerance is allowed for dimensions other than the cylindrical surface above the diameter φ 3, ψ 1, ψ 2 , ψ 3, ψ 4 You. Such a multi-stage shaft 41 (FIG. 5)
The apparatus of the embodiment of FIG. 5 configured to finish the grinding is essentially the same as the configuration of FIG. 1, and the grinding wheels are a large diameter grinding wheel 7 ″ and a small diameter grinding wheel 8 ″. And the rotation is controlled independently, and the feed is controlled independently in the X and Y directions. The adjustment grindstone is a large-diameter adjustment wheel 9 ″ and a small-diameter portion adjustment wheel. The grinding wheel 10 "is divided into a plurality of grinding wheels 10", and the rotation control and the feed control can be independently performed. In this example, the two adjusting grinding wheels 9 "and 10" are always driven to rotate at the same rotation speed, and the X-axis is rotated at the same speed. Driven by cutting feed in the direction.
【００１２】まず本図４（Ａ）に示すように、調整砥石
９″，１０″を回転させながら矢印Ａ，Ｂのごとく切込
み送りし、３個所の小径部φ1の円柱面を小径部用研削
砥石８″により、２個所の大径部φ2の円柱面を大径部
用研削砥石７″により、それぞれセンターレス研削す
る。このとき、ストッパＳｔとフランジ状部の端面ｊと
の間隙寸法ｔが、図５の目標形状に記入した寸法ｔと等
しくなるように、該ストッパＳｔの位置を設定してお
く。図においてストッパＳｔの左端面に施したハッチン
グは耐摩耗用に貼着した超硬合金のチップを表わしてい
る。[0012] First, as shown in the FIG. 4 (A), the regulating wheel 9 ", 10" arrow A while rotating, and then feeding the cut as a B, small diameter portion diameter portion phi 1 of the cylindrical surface of the three positions Centerless grinding is performed on the two cylindrical surfaces of the large-diameter portion φ 2 by the grinding wheel 8 ″ by the large-diameter grinding wheel 7 ″. At this time, the position of the stopper St is set so that the gap dimension t between the stopper St and the end face j of the flange-shaped portion is equal to the dimension t described in the target shape in FIG. In the figure, the hatching on the left end surface of the stopper St represents a cemented carbide chip stuck for wear resistance.
【００１３】上述のようにして大径部φ2，小径部φ1を
センターレス研削しつつ、小径部用研削砥石８″をＮＣ
制御で矢印Ｄのごとく、Ｙ軸方向に所定位置まで送りつ
つ、フランジ状部の端面ｉを研削する。これにより、本
図４（Ｂ）に示すフランジ状部の厚さ寸法Ｔと位置寸法
ｔとを高精度で制御することができる。As described above, while grinding the large-diameter portion φ 2 and the small-diameter portion φ 1 centerlessly, the grinding wheel 8 ″ for the small-diameter portion is NC-ground.
The end face i of the flange-shaped portion is ground while being fed to a predetermined position in the Y-axis direction by the control as indicated by an arrow D. Thus, the thickness T and the position t of the flange-shaped portion shown in FIG. 4B can be controlled with high accuracy.
【００１４】前記大径部φ2，小径部φ1の研削を終える
と、（Ｂ）図のごとく大径部用研削砥石７″を退避（被
加工物から離間）させるとともに、小径部用研削砥石
８″を矢印Ｄ′のごとく移動させて小径部φ1と対向し
ない位置に、かつ、径寸法φ3の円柱面と対向する位置
に移し、矢印Ａ′のごとく径方向に切り込み送りして、
前記大径部，小径部以外の円柱面をセンターレス研削す
る。このようにして、図５に示した目的形状，目的精度
の製品を仕上げることができる。When the grinding of the large-diameter portion φ 2 and the small-diameter portion φ 1 is completed, the large-diameter portion grinding wheel 7 ″ is retracted (separated from the workpiece) as shown in FIG. the grinding wheel 8 "arrow D 'in the position moved not opposed to the small diameter portion phi 1 as described and transferred to a position where the cylindrical surface facing the diameter phi 3, the arrow a' by feeding cut in the radial direction as the ,
A cylindrical surface other than the large diameter portion and the small diameter portion is subjected to centerless grinding. In this way, a product having the target shape and target accuracy shown in FIG. 5 can be finished.
【００１５】[0015]
【発明の効果】以上説明したように、本発明の装置を用
いて本発明の方法を実施すると、段付き形状の加工物の
大径部および小径部のそれぞれを、最適の周速でセンタ
ーレス研削することができるので、大径部と小径部との
周速差による滑りの問題を生じることなく、センターレ
ス研削特有の造円作用により高精度の真円仕上げをする
ことができる。そして、前記段付き形状の加工物の大径
部を円柱面に仕上げることもでき、円錐面ないし回転面
に仕上げることもできる。As described above, when the method of the present invention is carried out using the apparatus of the present invention, each of the large-diameter portion and the small-diameter portion of the stepped workpiece can be centerlessly adjusted at the optimum peripheral speed. Since the grinding can be performed, a highly accurate perfect circular finish can be achieved by the circular forming operation peculiar to the centerless grinding without causing a slip problem due to a peripheral speed difference between the large diameter portion and the small diameter portion. The large-diameter portion of the stepped workpiece can be finished into a cylindrical surface, or can be finished into a conical surface or a rotating surface.
【００１６】さらに、その応用として、前記大径部，小
径部以外の円柱面や、端面を高精度に仕上げることもで
きる。Further, as an application thereof, a cylindrical surface and an end surface other than the large diameter portion and the small diameter portion can be finished with high precision.
【図１】本発明に係るセンターレス研削装置の１実施例
を示す平面図、および正面図である。FIG. 1 is a plan view and a front view showing an embodiment of a centerless grinding apparatus according to the present invention.
【図２】上記と異なる実施例を示し、内燃機関用バルブ
のステムとフェースとを研削する場合の説明図である。FIG. 2 shows an embodiment different from the above, and is an explanatory view in the case of grinding a stem and a face of an internal combustion engine valve.
【図３】本発明に係るセンターレス研削装置を適用して
構成したバルブ研削機の平面図である。FIG. 3 is a plan view of a valve grinding machine configured by applying the centerless grinding device according to the present invention.
【図４】本発明に係る段付き加工物のセンターレス研削
装置の、前記と異なる実施例であり、（Ａ）は図５に示
した被加工物の大径部，小径部および端面を研削してい
る状態の平面図、（Ｂ）は上記大径部，小径部以外の円
柱面を研削している状態の平面図である。4A and 4B show another embodiment of a centerless grinding apparatus for a stepped workpiece according to the present invention, in which a large diameter portion, a small diameter portion and an end face of a workpiece shown in FIG. 5 are ground; FIG. 4B is a plan view showing a state in which a cylindrical surface other than the large diameter portion and the small diameter portion is ground.
【図５】上記実施例における被加工物であって、大径部
φ2，小径部φ1とフランジ状部と、上記大径部，小径部
以外の円柱面φ3とを有する多段軸状部材の加工目標形
状を示す側面図である。FIG. 5 is a multi-stage shaft having a large-diameter portion φ 2 , a small-diameter portion φ 1 , a flange-shaped portion, and a cylindrical surface φ 3 other than the large-diameter portion and the small-diameter portion. It is a side view which shows the processing target shape of a member.
【図６】段付き加工物用センターレス研削装置の従来例
を示す平面図、および正面図である。FIG. 6 is a plan view and a front view showing a conventional example of a centerless grinding apparatus for a stepped workpiece.
１…加工物、２…従来例の段付き形の研削砥石、３…従
来例の段付き形の調整砥石、４…ブレード、５，６…駆
動機構、７，７′，７″…大径部用の研削砥石、８，
８′，８″…小径部用の研削砥石、９，９″…大径部用
の調整砥石、１０，１０″…小径部用の調整砥石、１
０′…調整砥石、１１…大径部用研削砥石の駆動機構、
１２…小径部用研削砥石の駆動機構、１３…大径部用の
調整砥石の駆動機構、１４…小径部用の調整砥石の駆動
機構、３１…内燃機関用バルブ、３１ａ…バルブステ
ム、３１ｂ…バルブフェース。DESCRIPTION OF SYMBOLS 1 ... Workpiece, 2 ... Conventional stepped grinding wheel, 3 ... Conventional stepped adjusting grindstone, 4 ... Blade, 5, 6 ... Drive mechanism, 7, 7 ', 7 "... Large diameter Grinding wheels for parts, 8,
8 ', 8 ": grinding wheel for small diameter portion, 9, 9": adjusting wheel for large diameter portion, 10, 10 ": adjusting wheel for small diameter portion, 1
0 ': Adjusting whetstone, 11: Drive mechanism of grinding wheel for large diameter part,
12: drive mechanism of the grinding wheel for the small diameter portion, 13: drive mechanism of the adjustment wheel for the large diameter portion, 14: drive mechanism of the adjustment wheel for the small diameter portion, 31: valve for the internal combustion engine, 31a: valve stem, 31b ... Valve face.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B24B 5/18 - 5/307──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) B24B 5/18-5/307
Claims (6)
駆動手段を有する大径部用研削砥石と、周速を任意に制
御することの出来る回転駆動手段を有する小径部用研削
砥石と、周速を任意に制御することの出来る回転駆動手
段を有する大径部用調整砥石と、周速を任意に制御する
ことの出来る回転駆動手段を有する小径部用調整砥石と
を具備しており、かつ、前記４つの回転駆動手段は相互
に独立して周速を制御し得る構造であって、 前記大径部用研削砥石および小径部用研削砥石の内の少
なくとも何れか一方は該砥石の軸心方向に移動せしめ得
る構造であり、かつ、前記大径部用研削砥石および小径
部用研削砥石の少なくとも何れか一方はその径方向に移
動せしめ得る構造であり、 かつ、前記軸心方向の移動と径方向の移動とを連動せし
め得るようになっているとともに、該軸心方向の移動速
度と径方向の移動速度との比を一定に保持して大径部用
研削砥石および小径部用研削砥石の内の何れか一方を直
線に沿って移動せしめ得るようになっていることを特徴
とする、段付き加工物のセンターレス研削装置。A grinding wheel for a large diameter portion having a rotation driving means capable of arbitrarily controlling a peripheral speed; a grinding wheel for a small diameter portion having a rotation driving means capable of arbitrarily controlling a peripheral speed; It has a large-diameter portion adjusting grindstone having a rotation driving means capable of arbitrarily controlling the peripheral speed, and a small-diameter portion adjusting grinding wheel having a rotational driving means capable of arbitrarily controlling the peripheral speed, In addition, the four rotation driving means have a structure capable of controlling a peripheral speed independently of each other, and at least one of the large-diameter portion grinding wheel and the small-diameter portion grinding wheel is a shaft of the grinding wheel. The grinding wheel for the large diameter portion and the grinding wheel for the small diameter portion have a structure capable of being moved in the radial direction, and the movement in the axial direction. And movement in the radial direction While maintaining a constant ratio between the moving speed in the axial direction and the moving speed in the radial direction, one of the large-diameter portion grinding wheel and the small-diameter portion grinding wheel is linearly moved. A centerless grinding apparatus for a stepped workpiece, characterized in that the apparatus can be moved along.
駆動手段を有する大径部用研削砥石と、周速を任意に制
御することの出来る回転駆動手段を有する小径部用研削
砥石と、周速を任意に制御することの出来る回転駆動手
段を有する大径部用調整砥石と、周速を任意に制御する
ことの出来る回転駆動手段を有する小径部用調整砥石と
を具備しており、かつ、前記４つの回転駆動手段は相互
に独立して周速を制御し得る構造であって、 前記大径部用研削砥石および小径部用研削砥石の内の少
なくとも何れか一方は該砥石の軸心方向に移動せしめ得
る構造であり、かつ、前記大径部用研削砥石および小径
部用研削砥石の少なくとも何れか一方はその径方向に移
動せしめ得る構造であり、 前記軸心方向の移動速度と径方向の移動速度とをそれぞ
れ任意に調整し得る構造であり、これによって大径部用
研削砥石および小径部用研削砥石の少なくとも何れか一
方を所望の水平な曲線に沿って移動せしめ得るようにな
っていることを特徴とする段付き加工物のセンターレス
研削装置。2. A grinding wheel for a large diameter portion having a rotation driving means capable of arbitrarily controlling a peripheral speed, a grinding wheel for a small diameter portion having a rotation driving means capable of arbitrarily controlling a peripheral speed, It has a large-diameter portion adjusting grindstone having a rotation driving means capable of arbitrarily controlling the peripheral speed, and a small-diameter portion adjusting grinding wheel having a rotational driving means capable of arbitrarily controlling the peripheral speed, In addition, the four rotation driving means have a structure capable of controlling a peripheral speed independently of each other, and at least one of the large-diameter portion grinding wheel and the small-diameter portion grinding wheel is a shaft of the grinding wheel. A structure that can be moved in the axial direction, and at least one of the large-diameter portion grinding wheel and the small-diameter portion grinding wheel is a structure that can be moved in the radial direction. The radial movement speed and It is a structure that can be adjusted arbitrarily, whereby at least one of the large-diameter portion grinding wheel and the small-diameter portion grinding wheel can be moved along a desired horizontal curve. Centerless grinding machine for stepped workpieces.
動され、軸心方向にも径方向にも移動しない軸位置固定
構造であることを特徴とする、請求項２に記載した段付
き加工物のセンターレス研削装置。3. A grinding wheel for the small diameter portion is rotated at a fixed position, characterized in that it is a shaft position fixing structure that does not move in the radial direction in the axial direction, stepped according to claim 2 Centerless grinding machine for workpieces.
大径部とが設けられている加工物をセンターレス研削す
る方法において、 小径部用研削砥石と調整砥石とによって上記小径部の円
柱面を研削するとともに、大径部用研削砥石を軸心方向
と径方向との両方向へ同時に移動させつつ上記大径部の
円錐面をセンターレス研削することを特徴とする、段付
き加工物のセンターレス研削方法。4. A method of centerless grinding a workpiece provided with a small-diameter portion having a cylindrical surface and a large-diameter portion having a conical surface, the method comprising the steps of: The stepped workpiece is characterized in that the surface is ground and the conical surface of the large diameter portion is centerlessly ground while simultaneously moving the grinding wheel for the large diameter portion in both the axial direction and the radial direction. Centerless grinding method.
円錐面を研削している間、小径部用研削砥石を径方向に
も軸心方向にも移動させることなく、該小径部用研削砥
石の回転軸の位置を固定することを特徴とする、請求項
４に記載した段付き加工物のセンターレス研削方法。5. While grinding the conical surface of the large-diameter portion with the grinding wheel for the large-diameter portion, the grinding wheel for the small-diameter portion is not moved in either the radial direction or the axial center direction. The centerless grinding method for a stepped workpiece according to claim 4, wherein the position of the rotation axis of the grinding wheel is fixed.
大径部とが設けられている加工物をセンターレス研削す
る方法において、 小径部用研削砥石と調整砥石によって上記小径部の円柱
面を研削するとともに、大径部用研削砥石を軸心方向と
径方向との両方向へ同時に移動させつつ、 大径部用研削砥石の軸心方向移動速度および径方向の移
動速度を制御して、該大径部用研削砥石を所望の曲線に
沿わせて移動させることを特徴とする、段付き加工物の
センターレス研削方法。6. A method for centerless-grinding a workpiece provided with a small-diameter portion having a cylindrical surface and a large-diameter portion having a rotating surface, the method comprising the steps of: While simultaneously grinding the large-diameter portion grinding wheel in both the axial direction and the radial direction, controlling the axial-direction moving speed and the radial moving speed of the large-diameter portion grinding wheel, A centerless grinding method for a stepped workpiece, wherein the grinding wheel for a large diameter portion is moved along a desired curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5161542A JP2774760B2 (en) | 1992-11-26 | 1993-06-30 | Centerless grinding device for stepped workpiece and grinding method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4-317242 | 1992-11-26 | ||
| JP31724292 | 1992-11-26 | ||
| JP5161542A JP2774760B2 (en) | 1992-11-26 | 1993-06-30 | Centerless grinding device for stepped workpiece and grinding method |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16256497A Division JPH1071546A (en) | 1997-06-19 | 1997-06-19 | Centerless grinding method and centerless grinding device for grinding plural positions simultaneously |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06210559A JPH06210559A (en) | 1994-08-02 |
| JP2774760B2 true JP2774760B2 (en) | 1998-07-09 |
Family
ID=26487637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5161542A Expired - Lifetime JP2774760B2 (en) | 1992-11-26 | 1993-06-30 | Centerless grinding device for stepped workpiece and grinding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2774760B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3984804B2 (en) * | 2001-07-17 | 2007-10-03 | 光洋機械工業株式会社 | Centerless grinding method and centerless grinding apparatus for bar workpiece |
| JP4539557B2 (en) * | 2005-12-28 | 2010-09-08 | 株式会社ジェイテクト | Method and apparatus for controlling sizing of machine tool |
| KR101247942B1 (en) * | 2011-04-20 | 2013-04-01 | 주식회사 지엔비 | Carbon Shaft Grinding Machines |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE860768C (en) | 1942-08-18 | 1952-12-22 | Hartex G M B H Maschinen Und W | Centerless grinding machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5748460A (en) * | 1980-08-29 | 1982-03-19 | Kobe Steel Ltd | Centerless grinder |
| JPS5871052A (en) * | 1981-10-19 | 1983-04-27 | Hitachi Ltd | Centerless grinding machine |
| JPH0349865A (en) * | 1989-07-12 | 1991-03-04 | Nippei Toyama Corp | Grinding machine |
-
1993
- 1993-06-30 JP JP5161542A patent/JP2774760B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE860768C (en) | 1942-08-18 | 1952-12-22 | Hartex G M B H Maschinen Und W | Centerless grinding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06210559A (en) | 1994-08-02 |
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