JP2013237132A - Grinding method and grinding device - Google Patents

Grinding method and grinding device Download PDF

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JP2013237132A
JP2013237132A JP2012112953A JP2012112953A JP2013237132A JP 2013237132 A JP2013237132 A JP 2013237132A JP 2012112953 A JP2012112953 A JP 2012112953A JP 2012112953 A JP2012112953 A JP 2012112953A JP 2013237132 A JP2013237132 A JP 2013237132A
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grinding
workpiece
rotating grindstone
processing
grindstone
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Nobuhiro Asai
伸宏 浅井
Hiroaki Yamagishi
弘昭 山岸
Daisuke Koshino
大介 越野
Akihiro Nemoto
章宏 根本
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a grinding method that processes the surface of a workpiece which has been once smoothly finished to coarse roughness while the geometry of the workpiece is maintained at high accuracy, and exhibits preferable manufacturing efficiency, and to provide a grinding device.SOLUTION: A grinding step S2 of grinding a conic surface WFa of a flange WF of a workpiece W with a single grinding wheel 5 includes: a rough cut-in step S21 and a finish cut-in step S22; a spark-out step S23 after the finish cut-in step S22; and a roughening cut-in step S24 after the spark-out step S23.

Description

本発明は、研削加工方法および研削加工装置に関する。   The present invention relates to a grinding method and a grinding apparatus.

従来、軸状部材の研削加工方法として、軸状部材に対する切込み量が大きい粗研削工程と、軸状部材を空転させて被研削部に発生した熱を除去する空転工程と、軸状部材に対する切込み量が小さい仕上げ研削工程と、からなる研削加工方法が開示されている（特許文献１参照）。
この技術によると、粗研削工程で軸状部材を研削加工した後に軸状部材を空転させるので、空冷および研削冷却液により軸状部材の研削加工箇所に発生した熱を除去でき、さらに、粗研削工程で発生した残留応力による歪み層を仕上げ研削工程で除去できるので、残留応力値を略一定にできる。
このため、軸状部材に熱応力が発生することを抑制でき、軸状部材に残存する残留応力を低減できる。 Conventionally, as a grinding method for a shaft-shaped member, a rough grinding process with a large depth of cut with respect to the shaft-shaped member, an idle process for removing heat generated in the portion to be ground by idling the shaft-shaped member, and a notch for the shaft-shaped member A grinding method comprising a finish grinding step with a small amount is disclosed (see Patent Document 1).
According to this technology, since the shaft-shaped member is idled after the shaft-shaped member is ground in the rough grinding process, the heat generated in the grinding portion of the shaft-shaped member can be removed by the air cooling and the grinding coolant, and the rough grinding is performed. Since the strain layer due to the residual stress generated in the process can be removed in the finish grinding process, the residual stress value can be made substantially constant.
For this reason, it can suppress that a thermal stress generate | occur | produces in a shaft-shaped member, and can reduce the residual stress which remains in a shaft-shaped member.

特許第３９３９１０７号公報Japanese Patent No. 3939107

ところで、近年のＣＶＴ用シャフトプーリなどのワークでは表面にオイルを滞留させるオイル溜まりを設けるので、一度平滑に仕上げたワークの表面の粗さを荒くする。
しかしながら上記特許文献１に開示された技術では、ワークの表面を仕上げるための研削加工方法であるので、一度平滑に仕上げたワークの表面の粗さを荒くすることができない。
また、一度平滑に仕上げたワークの表面の粗さを荒くする場合には、ワークを再度研削するので、ワークの形状寸法の精度が低下することがある。
さらには、一度平滑に仕上げたワークの表面の粗さを荒くする場合として、第１の砥石で研削して一度平滑に仕上げたワークの表面を第２の砥石で研削すると、２つの砥石をそれぞれ使用した２つの工程が必要となり、工程数が多くなり製造効率が悪化する。 By the way, since a work such as a shaft pulley for CVT in recent years is provided with an oil reservoir for retaining oil on the surface, the surface roughness of the work once finished smooth is roughened.
However, since the technique disclosed in Patent Document 1 is a grinding method for finishing the surface of the workpiece, the roughness of the surface of the workpiece once smoothed cannot be roughened.
In addition, when the surface of the workpiece once smoothed is roughened, the workpiece is ground again, so that the accuracy of the shape dimension of the workpiece may be lowered.
Furthermore, when the surface of the workpiece once smoothed is roughened, the surface of the workpiece once smoothed by grinding with the first grindstone is ground with the second grindstone. The two processes used are required, the number of processes increases, and manufacturing efficiency deteriorates.

本発明は上記課題を解決するためのものであり、その目的は、ワークの形状寸法を高い精度に維持したまま、一度平滑に仕上げたワークの表面を荒い粗さに加工する、製造効率が良好な研削加工方法および研削加工装置を提供することにある。   The present invention is for solving the above-mentioned problems, and its purpose is to process the surface of a workpiece once smoothed into a rough roughness while maintaining the shape and dimension of the workpiece with high accuracy, and has high production efficiency. Is to provide a grinding method and a grinding apparatus.

（１） 切込み量を数値制御される単一の回転砥石（例えば、後述の回転砥石５）を使用してワーク（例えば、後述のワークＷ）の表面の一部または全面の加工面（例えば、後述の円錐面ＷＦａ）を所望の面性状に仕上げるために、前記回転砥石で前記加工面を研削する研削工程（例えば、後述の研削工程Ｓ２）を有する研削加工方法であって、前記研削工程は、１次加工（例えば、後述の粗切込み工程Ｓ２１および仕上げ切込み工程Ｓ２２）と、前記１次加工後の、前記回転砥石における残りの切込み量が零であり、かつ、前記加工面への押圧力が零である２次加工（例えば、後述のスパークアウト工程Ｓ２３）と、前記２次加工後の、前記加工面に切込み跡を付ける加工（例えば、後述の荒し切込み工程Ｓ２４）と、を含むことを特徴とする研削加工方法。   (1) Using a single rotating grindstone (for example, a rotating grindstone 5 to be described later) whose cutting depth is numerically controlled, a part of the surface of the workpiece (for example, a workpiece W to be described later) or the entire processed surface (for example, In order to finish a later-described conical surface WFa) to have a desired surface property, the grinding method includes a grinding process (for example, a grinding process S2 described later) for grinding the processed surface with the rotating grindstone, Primary processing (for example, rough cutting step S21 and finishing cutting step S22 described later), and the remaining cutting amount in the rotating grindstone after the primary processing is zero, and the pressing force to the processing surface Including secondary processing (for example, a spark-out step S23 described later) and processing for making a cut mark on the processed surface after the secondary processing (for example, a rough cutting step S24 described later). With features Grinding how.

（１）の発明によると、切込み量を数値制御される単一の回転砥石での研削工程において、１次加工、回転砥石における残りの切込み量が零であり、かつ、加工面への押圧力が零である２次加工および加工面に切込み跡を付ける加工を実施する。
これにより、最終的なワークの加工面に切込み跡を付ける加工によって、一度平滑に仕上げたワークの表面を荒い粗さに加工することができる。このとき、最終的なワークの加工面に切込み跡を付ける加工では、ワークの平滑に仕上げた面に切込み跡を付けるだけで、ワークの形状寸法を変更しないので、ワークの形状寸法を高い精度に維持することができる。また、一連の加工を単一の回転砥石での研削工程において行うので、他の砥石を用いた別工程が必要なく、工程数を増加させず、製造効率が良好となる。 According to the invention of (1), in the grinding process with a single rotating grindstone whose cutting amount is numerically controlled, the remaining cutting amount in the primary processing and the rotating grindstone is zero, and the pressing force to the machining surface Secondary processing in which is zero and processing for making a cut mark on the processing surface are performed.
Thereby, the surface of the workpiece once smoothed can be processed into rough roughness by processing to make a cut mark on the processed surface of the final workpiece. At this time, in the process of making a cut mark on the final work surface of the workpiece, only the cut mark is made on the smooth finished surface of the work, and the shape of the work is not changed. Can be maintained. Moreover, since a series of processes are performed in a grinding process using a single rotating grindstone, there is no need for a separate process using another grindstone, the number of processes is not increased, and the production efficiency is improved.

（２） 前記加工面に切込み跡を付ける加工は、前記加工面に１〜１０数μｍの切込み量で切込む加工であることを特徴とする（１）記載の研削加工方法。   (2) The grinding method according to (1), wherein the process of making a cut mark on the processed surface is a process of cutting the processed surface with a cutting amount of 1 to 10 μm.

（２）の発明によると、最終的なワークの加工面に切込み跡を付ける加工では、ワークの加工面に１〜１０数μｍの切込み量で切込むので、一度平滑に仕上げたワークの表面を荒い粗さに加工することができるとともに、ワークの平滑に仕上げた面に切込み跡を付けるだけで、ワークの形状寸法を変更しないので、ワークを高い精度の形状寸法に維持することができる。
ここで、ワークの加工面に１μｍ以上の切込み量で切込むことで、ワークの表面を荒らすことができる。また、ワークの加工面に１０数μｍ以下の切込み量で切込むことで、過度に研削してワークの形状寸法を変更してしまうことがない。 According to the invention of (2), in the process of making a cut mark on the final work surface of the work, the work surface of the work is cut with a cut amount of 1 to 10 μm. The workpiece can be processed to have a rough roughness, and the shape of the workpiece is not changed only by making a cut mark on the smooth surface of the workpiece, so that the workpiece can be maintained at a highly accurate shape.
Here, the surface of the workpiece can be roughened by cutting into the processed surface of the workpiece with a cutting amount of 1 μm or more. Moreover, by cutting into the processed surface of a workpiece | work with the cutting amount of 10 or more micrometer or less, it grinds excessively and will not change the shape dimension of a workpiece | work.

（３） 前記研削工程の前に、前記回転砥石の表面に沿ってドレスするドレッシング工程（例えば、後述のドレッシング工程Ｓ１）を有し、前記ドレッシング工程では、回転する前記回転砥石にドレッサ（例えば、後述のドレッサ７４）を当接させつつ、一部において、前記回転砥石の回転速度と前記ドレッサの移動速度の少なくともどちらかを、相対的に速くしたり遅くしたり制御することを特徴とする（１）または（２）記載の研削加工方法。   (3) Before the grinding step, the dressing step (for example, dressing step S1 described later) for dressing along the surface of the rotary grindstone is included, and in the dressing step, a dresser (for example, A part of the rotational speed of the rotating grindstone and the moving speed of the dresser are controlled to be relatively faster or slower while abutting a dresser 74, which will be described later. The grinding method according to 1) or (2).

（３）の発明によると、回転する回転砥石にドレッサを当接させつつ、一部において、回転砥石の回転速度とドレッサの移動速度の少なくともどちらかを、相対的に速くしたり遅くしたり制御するドレッシング工程を有するので、回転砥石の目を良好に立てることができ、次の研削工程においてドレッシングされた回転砥石の所望の面性状でワークの加工面に切込み跡を付けることができる。   According to the invention of (3), at least one of the rotational speed of the rotating grindstone and the moving speed of the dresser is controlled to be relatively faster or slower while the dresser is brought into contact with the rotating grindstone. Therefore, the eyes of the rotating grindstone can be satisfactorily raised, and the work surface of the workpiece can be marked with a desired surface property of the rotating grindstone dressed in the next grinding process.

（４） 前記加工面に切込み跡を付ける加工は、回転する前記回転砥石を回転軸の軸方向と直角の方向に移動させて研削するプランジ研削を実施することにより、前記回転砥石の面性状を前記加工面に転写する加工であることを特徴とする（１）〜（３）のいずれかに記載の研削加工方法。   (4) The process of making a cut mark on the processed surface is performed by performing plunge grinding in which the rotating grindstone that is rotating is moved in a direction perpendicular to the axial direction of the rotating shaft to perform grinding, so that the surface properties of the rotating grindstone are changed. The grinding method according to any one of (1) to (3), wherein the grinding method is a process of transferring to the processed surface.

（４）の発明によると、砥石表面の凹凸を平均化させて研削を行うトラバース研削ではなく、砥石表面の凹凸を平均化させないプランジ研削によって加工面に切込み跡を付ける。これにより、一度平滑に仕上げたワークの表面を荒い粗さに加工することができるとともに、ワークの平滑に仕上げた面に切込み跡を付けるだけで、ワークの形状寸法を変更しないので、ワークの形状寸法を高い精度に維持することができる。   According to the invention of (4), the cut surface is marked by plunge grinding that does not average the unevenness of the grindstone surface, rather than traverse grinding that averages the unevenness of the grindstone surface. As a result, the surface of the workpiece once smoothed can be processed to rough roughness, and the shape of the workpiece is not changed by simply making a cut mark on the smooth finished surface of the workpiece. The dimensions can be maintained with high accuracy.

（５） 切込み量を数値制御される単一の回転砥石（例えば、後述の回転砥石５）を使用してワーク（例えば、後述のワークＷ）の表面の一部または全面の加工面（例えば、後述の円錐面ＷＦａ）を所望の面性状に仕上げるために、前記回転砥石で前記加工面を研削する手段（例えば、後述の研削工程Ｓ２）を有する研削加工装置（例えば、後述の研削加工装置１）であって、前記研削する手段は、１次加工（例えば、後述の粗切込み工程Ｓ２１および仕上げ切込み工程Ｓ２２）と、前記１次加工後の、前記回転砥石における残りの切込み量が零であり、かつ、前記加工面への押圧力が零である２次加工（例えば、後述のスパークアウト工程Ｓ２３）と、前記２次加工後の、前記加工面に切込み跡を付ける加工（例えば、後述の荒し切込み工程Ｓ２４）と、を実施することを特徴とする研削加工装置。   (5) Using a single rotating grindstone (for example, a rotating grindstone 5 described later) whose cutting depth is numerically controlled, a part of the surface of the workpiece (for example, a workpiece W described later) or the entire processed surface (for example, In order to finish a later-described conical surface WFa) to a desired surface property, a grinding device (for example, a grinding device 1 to be described later) having means (for example, a grinding step S2 to be described later) for grinding the processing surface with the rotary grindstone. And the grinding means has a primary processing (for example, a rough cutting step S21 and a finishing cutting step S22 described later) and a remaining cutting amount in the rotary grindstone after the primary processing is zero. And secondary processing (for example, below-mentioned spark out process S23) where the pressing force to the above-mentioned processing surface is zero, and processing (for example, below-mentioned) which makes a cut mark on the processing surface after the secondary processing Rough cutting S24 and), grinding apparatus which comprises carrying out the.

（５）の発明によると、（１）の発明と同様な効果を奏する。   According to invention of (5), there exists an effect similar to invention of (1).

本発明によれば、ワークの形状寸法を高い精度に維持したまま、一度平滑に仕上げたワークの表面を荒い粗さに加工する、製造効率が良好な研削加工方法および研削加工装置を提供することができる。   According to the present invention, it is possible to provide a grinding method and a grinding apparatus with good manufacturing efficiency, which process a surface of a workpiece once smoothed into a rough roughness while maintaining the shape and dimension of the workpiece with high accuracy. Can do.

本発明の実施形態に係る研削加工装置を示す平面図である。It is a top view which shows the grinding processing apparatus which concerns on embodiment of this invention. 上記実施形態に係る研削加工方法を示す工程図である。It is process drawing which shows the grinding method which concerns on the said embodiment. 上記実施形態に係るドレッシング工程での様子を示す図である。It is a figure which shows the mode in the dressing process which concerns on the said embodiment. 上記実施形態に係る研削工程での加工時間と切込み量との関係を示す図である。It is a figure which shows the relationship between the processing time and the cutting depth in the grinding process which concerns on the said embodiment. 上記実施形態に係る研削工程での様子を示す図である。It is a figure which shows the mode in the grinding process which concerns on the said embodiment.

以下に図面を参照して本発明の実施形態を説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は、本実施形態に係る研削加工方法および研削加工装置を適用する研削加工装置１を示す平面図である。
研削加工装置１は、架台２と、架台２に配置した主軸台３と、主軸台３に対向配置した芯押台４と、主軸台３と芯押台４とで支持したワークＷを研削加工する回転砥石５と、回転砥石５を移動させる移動手段６と、架台２に配置したロータリドレッサ装置７とを備える。 FIG. 1 is a plan view showing a grinding apparatus 1 to which a grinding method and a grinding apparatus according to this embodiment are applied.
The grinding apparatus 1 grinds the gantry 2, the headstock 3 disposed on the gantry 2, the core stock 4 disposed opposite to the main stock 3, and the workpiece W supported by the main stock 3 and the core stock 4. A rotating grindstone 5, a moving means 6 for moving the rotating grindstone 5, and a rotary dresser device 7 disposed on the gantry 2.

架台２は、床面に固定されている。
主軸台３は、図示しないモータと、チャック３１とを有し、チャック３１で把持したワークＷをモータで回転させる。
芯押台４は、主軸台３のチャック３１で把持したワークＷを芯出しした状態で支持する。
ワークＷは、一例として自動車などに使用するＣＶＴ用シャフトプーリが例に挙げられる。このワークＷは、フランジＷＦに円錐面ＷＦａを備える。円錐面ＷＦａは、研削加工装置１によって研削される加工面である。 The gantry 2 is fixed to the floor surface.
The headstock 3 has a motor (not shown) and a chuck 31 and rotates the workpiece W gripped by the chuck 31 with the motor.
The tailstock 4 supports the workpiece W gripped by the chuck 31 of the head stock 3 in a centered state.
As an example of the workpiece W, a shaft pulley for CVT used in an automobile or the like is given as an example. The workpiece W includes a conical surface WFa on the flange WF. The conical surface WFa is a processing surface that is ground by the grinding device 1.

移動手段６は、水平方向に沿って回動自在に架台２に配置した第１送りねじ６１と、第１送りねじ６１を回動する第１駆動モータ６２と、第１送りねじ６１にねじ結合した第１移動プレート６３と、第１移動プレート６３に固定した第２プレート６４と、軸６５ａに沿って回動自在に第２プレート６４に配置した第２送りねじ６５と、第２送りねじ６５を回動する第２駆動モータ６６とを有する。   The moving means 6 is screw-coupled to the first feed screw 61 disposed on the gantry 2 so as to be rotatable along the horizontal direction, the first drive motor 62 that rotates the first feed screw 61, and the first feed screw 61. The first moving plate 63, the second plate 64 fixed to the first moving plate 63, the second feed screw 65 disposed on the second plate 64 so as to be rotatable along the shaft 65a, and the second feed screw 65 And a second drive motor 66 that rotates.

第２送りねじ６５は、砥石用駆動モータ６７の図示しない載置台にねじ結合する。砥石用駆動モータ６７に、回転砥石５を取り付けることにより、回転砥石５の回転軸５１を軸６５ａよりα°だけ余分に傾斜させる。本実施形態では、α°は、５°程度であってよい。   The second feed screw 65 is screwed to a mounting table (not shown) of the grindstone drive motor 67. By attaching the rotating grindstone 5 to the grindstone driving motor 67, the rotating shaft 51 of the rotating grindstone 5 is inclined by an extra α ° from the shaft 65a. In the present embodiment, α ° may be about 5 °.

ロータリドレッサ装置７は、架台２に固定した支持板７１と、支持板７１に配置した駆動モータ７２と、駆動モータ７２の回転を伝達可能に連結した回転シャフト７３と、回転シャフト７３に取付けた円板状のドレッサ７４とを有する。
回転シャフト７３の中心軸は軸６５ａと平行である。 The rotary dresser device 7 includes a support plate 71 fixed to the gantry 2, a drive motor 72 disposed on the support plate 71, a rotation shaft 73 connected to transmit the rotation of the drive motor 72, and a circle attached to the rotation shaft 73. A plate-like dresser 74.
The central axis of the rotating shaft 73 is parallel to the axis 65a.

回転砥石５は、先広がりの円錐台砥石であり、回転砥石５の外周面である研削面は、軸６５ａと平行の位置にある。すなわち、研削面は、回転砥石５の回転軸５１に対してα°傾斜し、ワークＷのフランジＷＦの円錐面ＷＦａに平行の位置にある。
また、回転砥石５の研削面の幅は円錐面ＷＦａの幅と略同一である。
回転砥石５としては、ＣＢＮ砥石と呼ばれるものを使用する。 The rotating grindstone 5 is a conical grindstone that spreads forward, and the grinding surface that is the outer peripheral surface of the rotating grindstone 5 is in a position parallel to the shaft 65a. That is, the grinding surface is inclined by α ° with respect to the rotation shaft 51 of the rotating grindstone 5 and is in a position parallel to the conical surface WFa of the flange WF of the workpiece W.
The width of the grinding surface of the rotating grindstone 5 is substantially the same as the width of the conical surface WFa.
As the rotating grindstone 5, a so-called CBN grindstone is used.

以上の構成の研削加工装置１では、次のように研削加工方法を実施する。
図２は、本実施形態に係る研削加工方法を示す工程図である。
図２に示すように、本実施形態に係る研削加工方法では、ドレッシング工程Ｓ１と、研削工程Ｓ２とを実施する。 In the grinding apparatus 1 having the above configuration, the grinding method is performed as follows.
FIG. 2 is a process diagram showing the grinding method according to the present embodiment.
As shown in FIG. 2, in the grinding method according to the present embodiment, a dressing step S1 and a grinding step S2 are performed.

研削加工が開始されると、まずドレッシング工程Ｓ１を実施する。
図３は、本実施形態に係るドレッシング工程Ｓ１での様子を示す図である。
図３に示すように、ドレッサ７４を回転した状態で、回転砥石５を軸６５ａ方向および水平方向に移動させて、ドレッサ７４の右端部の延長線状に回転砥石５の研削面５ｆの左端部を合せ、回転砥石５にドレッサ７４を当接させる。
次に、回転砥石５を軸６５ａに沿って矢印Ａの方向に移動させる。これにより、回転砥石５の研削面５ｆをロータリドレッサ装置７の回転シャフト７３の中心軸と平行に移動させて、ドレッサ７４で研削面５ｆをドレスする。 When grinding is started, dressing step S1 is first performed.
FIG. 3 is a diagram showing a state in the dressing step S1 according to the present embodiment.
As shown in FIG. 3, with the dresser 74 rotated, the rotating grindstone 5 is moved in the direction of the shaft 65a and in the horizontal direction, and the left end portion of the grinding surface 5f of the rotating grindstone 5 is extended to the right end portion of the dresser 74. And the dresser 74 is brought into contact with the rotating grindstone 5.
Next, the rotating grindstone 5 is moved in the direction of arrow A along the shaft 65a. As a result, the grinding surface 5 f of the rotating grindstone 5 is moved in parallel with the central axis of the rotary shaft 73 of the rotary dresser device 7 and the grinding surface 5 f is dressed by the dresser 74.

ここで、図３に示すドレッシング工程Ｓ１では、一部において、回転砥石５の回転速度とドレッサ７４の回転速度の少なくともどちらかを、相対的に速くしたり遅くしたり制御する。これにより、回転砥石５の目を良好に立てる。   Here, in the dressing step S1 shown in FIG. 3, at least one of the rotational speed of the rotating grindstone 5 and the rotational speed of the dresser 74 is controlled to be relatively faster or slower in part. Thereby, the eyes of the rotating grindstone 5 are raised well.

次に、ドレッシング工程Ｓ１が完了すると、研削工程Ｓ２を実施する。
図４は、本実施形態に係る研削工程Ｓ２での加工時間と切込み量との関係を示す図である。図５は、本実施形態に係る研削工程Ｓ２での様子を示す図である。
研削工程Ｓ２は、図２、図４に示すように、粗切込み工程Ｓ２１と、仕上げ切込み工程Ｓ２２と、スパークアウト工程Ｓ２３と、荒し切込み工程Ｓ２４とを、単一の回転砥石５を用いて実行する。 Next, when the dressing step S1 is completed, a grinding step S2 is performed.
FIG. 4 is a diagram showing a relationship between the machining time and the cutting depth in the grinding step S2 according to the present embodiment. FIG. 5 is a diagram showing a state in the grinding step S2 according to the present embodiment.
As shown in FIGS. 2 and 4, the grinding step S <b> 2 executes a rough cutting step S <b> 21, a finishing cutting step S <b> 22, a spark-out step S <b> 23, and a rough cutting step S <b> 24 using a single rotating grindstone 5. To do.

研削工程Ｓ２に入ると、まず粗切込み工程Ｓ２１を実施する。
図５に示すように、回転砥石５の研削面５ｆは回転軸５１に対してα°傾斜し、ワークＷのフランジＷＦの円錐面ＷＦａはβ°傾斜している。このため、回転砥石５の研削面５ｆでワークＷのフランジＷＦの円錐面ＷＦａを研削する場合、回転砥石５が（α＋β）°傾斜する。
粗切込み工程Ｓ２１では、第１駆動モータ６２を駆動して第１送りねじ６１を回動し、回転砥石５を水平方向に沿って矢印Ｂ方向に移動させて、回転砥石５の研削面５ｆをフランジＷＦの円錐面ＷＦａに当接させる。そして、フランジＷＦの円錐面ＷＦａを研削面５ｆでプランジ研削する。プランジ研削は、回転砥石５を回転軸５１の軸方向と直角の方向（図５の矢印Ｂ方向）に移動させることにより回転砥石５の表面の凹凸を平均化させないで研削を行う方法である。このプランジ研削により、取代を大きく除去する。 When the grinding step S2 is entered, a rough cutting step S21 is first performed.
As shown in FIG. 5, the grinding surface 5f of the rotating grindstone 5 is inclined by α ° with respect to the rotating shaft 51, and the conical surface WFa of the flange WF of the workpiece W is inclined by β °. For this reason, when grinding the conical surface WFa of the flange WF of the workpiece W with the grinding surface 5f of the rotating grindstone 5, the rotating grindstone 5 is inclined by (α + β) °.
In the rough cutting step S21, the first drive motor 62 is driven to rotate the first feed screw 61, and the rotating grindstone 5 is moved in the arrow B direction along the horizontal direction so that the grinding surface 5f of the rotating grindstone 5 is moved. The flange WF is brought into contact with the conical surface WFa. Then, the conical surface WFa of the flange WF is plunge ground with the grinding surface 5f. Plunge grinding is a method in which grinding is performed without averaging the irregularities on the surface of the rotating grindstone 5 by moving the rotating grindstone 5 in a direction perpendicular to the axial direction of the rotating shaft 51 (in the direction of arrow B in FIG. 5). The plunge grinding greatly removes the machining allowance.

次に、粗切込み工程Ｓ２１の後に連続して仕上げ切込み工程Ｓ２２を実施する。
図５に示すように、仕上げ切込み工程Ｓ２２では、回転砥石５を回転軸５１に沿って矢印Ｃ方向に移動させて、回転砥石５の研削面５ｆでフランジＷＦの円錐面ＷＦａを仕上げるトラバース研削を行う。トラバース研削は、回転砥石５を回転軸５１の軸方向（図５の矢印Ｃ方向）に移動させることにより回転砥石５の表面の凹凸を平均化させて研削を行う方法である。このトラバース研削により、形状寸法に近づけるように取代を小さく除去する。 Next, the finish cutting step S22 is performed continuously after the rough cutting step S21.
As shown in FIG. 5, in the finish cutting step S22, traverse grinding is performed in which the rotating grindstone 5 is moved in the direction of arrow C along the rotation shaft 51 to finish the conical surface WFa of the flange WF with the grinding surface 5f of the rotating grindstone 5. Do. Traverse grinding is a method of performing grinding by moving the rotating grindstone 5 in the axial direction of the rotating shaft 51 (in the direction of arrow C in FIG. 5) to average the unevenness on the surface of the rotating grindstone 5. By this traverse grinding, the machining allowance is removed to be close to the shape.

次に、仕上げ切込み工程Ｓ２２後に連続してスパークアウト工程Ｓ２３を実施する。
スパークアウト工程Ｓ２３は、研削加工装置１における残りの切込み量が零であり、かつ、ワークＷのフランジＷＦの円錐面ＷＦａへの押圧力が零である状態を、数秒間維持する加工である。このスパークアウト工程Ｓ２３により、所望の形状寸法および平滑面に仕上げるとともに、ワークＷのフランジＷＦの撓みを除去する。 Next, the spark-out step S23 is performed continuously after the finish cutting step S22.
The spark-out process S23 is a process for maintaining the state in which the remaining cutting amount in the grinding apparatus 1 is zero and the pressing force to the conical surface WFa of the flange WF of the workpiece W is zero for several seconds. By this spark-out step S23, a desired shape and a smooth surface are finished, and bending of the flange WF of the workpiece W is removed.

次に、スパークアウト工程Ｓ２３後に連続して荒し切込み工程Ｓ２４を実施する。荒し切込み工程Ｓ２４は、ワークＷのフランジＷＦの円錐面ＷＦａに切込み跡を付ける加工の工程である。
図５に示すように、荒し切込み工程Ｓ２４では、フランジＷＦの円錐面ＷＦａを研削面５ｆで１〜１０数μｍの切込み量だけプランジ研削する。この荒し切込み工程Ｓ２４により、回転砥石５の面性状を、一度平滑に仕上げたワークＷのフランジＷＦの円錐面ＷＦａに転写させる。
なお、荒し切込み工程Ｓ２４では、１〜１０数μｍの切込み量だけのプランジ研削であるので、ワークＷのフランジＷＦの円錐面ＷＦａと回転砥石５との接触は少ない方がよく、円錐面ＷＦａと回転砥石５との接触は、円錐面ＷＦａの全面に面性状を転写するために１回転以上としつつも、より少ない回転数に設定される。 Next, the rough cutting step S24 is performed continuously after the spark-out step S23. The rough cutting process S24 is a process of making a cut mark on the conical surface WFa of the flange WF of the workpiece W.
As shown in FIG. 5, in the rough cutting step S24, the conical surface WFa of the flange WF is plunge-ground by a cutting amount of 1 to 10 μm on the grinding surface 5f. By this rough cutting step S24, the surface property of the rotating grindstone 5 is transferred to the conical surface WFa of the flange WF of the workpiece W which has been smoothed once.
In the rough cutting step S24, since the plunge grinding is performed by a cutting amount of 1 to 10 μm, the contact between the conical surface WFa of the flange WF of the workpiece W and the rotating grindstone 5 is better, and the conical surface WFa and The contact with the rotating grindstone 5 is set to a smaller number of rotations while being set to one rotation or more in order to transfer the surface property to the entire surface of the conical surface WFa.

ここで、ワークＷのフランジＷＦの円錐面ＷＦａに１μｍ以上の切込み量で切込むことで、ワークＷのフランジＷＦの円錐面ＷＦａの表面を荒らすことができる。また、ワークＷのフランジＷＦの円錐面ＷＦａに１０数μｍ以下の切込み量で切込むことで、過度に研削してワークＷの形状寸法を変更してしまうことがない。   Here, the surface of the conical surface WFa of the flange WF of the workpiece W can be roughened by cutting into the conical surface WFa of the flange WF of the workpiece W with a cutting amount of 1 μm or more. Further, by cutting into the conical surface WFa of the flange WF of the workpiece W with a cutting amount of 10 tens μm or less, the shape dimension of the workpiece W is not changed by excessive grinding.

荒し切込み工程Ｓ２４の後、研削加工を終了する。   After the rough cutting step S24, the grinding process is finished.

以上の本実施形態に係る研削加工装置１によれば、以下の効果を奏する。   According to the grinding apparatus 1 according to the above-described embodiment, the following effects are obtained.

（１）の発明によると、切込み量を数値制御される単一の回転砥石５での研削工程Ｓ２において、粗切込み工程Ｓ２１、仕上げ切込み工程Ｓ２２、スパークアウト工程Ｓ２３および荒し切込み工程Ｓ２４を実施する。
これにより、最終的な荒し切込み工程Ｓ２４によって、一度平滑に仕上げたワークＷのフランジＷＦの円錐面ＷＦａの表面を荒い粗さに加工することができる。このとき、最終的な荒し切込み工程Ｓ２４では、ワークＷのフランジＷＦの円錐面ＷＦａの平滑に仕上げた面に切込み跡を付けるだけで、ワークＷの形状寸法を変更しないので、ワークＷの形状寸法を高い精度に維持することができる。また、一連の加工を単一の回転砥石５での研削工程Ｓ２において行うので、他の砥石を用いた別工程が必要なく、工程数を増加させず、製造効率が良好となる。 According to the invention of (1), the rough cutting step S21, the finishing cutting step S22, the spark-out step S23, and the rough cutting step S24 are performed in the grinding step S2 with the single rotating grindstone 5 whose cutting amount is numerically controlled. .
As a result, the surface of the conical surface WFa of the flange WF of the workpiece W that has been once smoothed can be processed into rough roughness by the final rough cutting step S24. At this time, in the final rough cutting step S24, the shape dimension of the workpiece W is not changed by merely making a cut mark on the smooth finished surface of the conical surface WFa of the flange WF of the workpiece W. Can be maintained with high accuracy. Moreover, since a series of processing is performed in the grinding step S2 with the single rotating grindstone 5, no separate process using another grindstone is required, the number of processes is not increased, and the production efficiency is improved.

（２）最終的な荒し切込み工程Ｓ２４では、ワークＷのフランジＷＦの円錐面ＷＦａに１〜１０数μｍの切込み量で切込むので、一度平滑に仕上げたワークＷのフランジＷＦの円錐面ＷＦａの表面を荒い粗さに加工することができるとともに、ワークＷのフランジＷＦの円錐面ＷＦａの平滑に仕上げた面に切込み跡を付けるだけで、ワークＷの形状寸法を変更しないので、ワークＷを高い精度の形状寸法に維持することができる。   (2) In the final rough cutting step S24, the conical surface WFa of the flange WF of the workpiece W is cut with a cutting amount of 1 to 10 μm, so the conical surface WFa of the flange WF of the workpiece W which has been smoothed once. The surface of the workpiece W can be processed to have a rough roughness, and the shape of the workpiece W is not changed by merely making a cut mark on the smooth finished surface of the conical surface WFa of the flange WF of the workpiece W. Accurate geometric dimensions can be maintained.

（３）回転砥石５にドレッサ７４を当接させつつ、一部において、回転砥石５の回転速度とドレッサ７４の回転速度の少なくともどちらかを、相対的に速くしたり遅くしたり制御するドレッシング工程Ｓ１を有するので、回転砥石５の目を良好に立てることができ、次の研削工程Ｓ２においてドレッシングされた回転砥石５の所望の面性状でワークＷのフランジＷＦの円錐面ＷＦａに切込み跡を付けることができる。   (3) A dressing process in which at least one of the rotational speed of the rotating grindstone 5 and the rotational speed of the dresser 74 is controlled to be relatively faster or slower while the dresser 74 is in contact with the rotating grindstone 5. Since S1 is provided, the eyes of the rotating grindstone 5 can be satisfactorily raised, and the conical surface WFa of the flange WF of the workpiece W is cut with a desired surface property of the rotating grindstone 5 dressed in the next grinding step S2. be able to.

（４）回転砥石５の表面の凹凸を平均化させて研削を行うトラバース研削ではなく、回転砥石５の表面の凹凸を平均化させないプランジ研削によってワークＷのフランジＷＦの円錐面ＷＦａの表面に切込み跡を付ける荒し切込み工程Ｓ２４を実施する。これにより、一度平滑に仕上げたワークＷのフランジＷＦの円錐面ＷＦａの表面を荒い粗さに加工することができるとともに、ワークＷのフランジＷＦの円錐面ＷＦａの平滑に仕上げた面に切込み跡を付けるだけで、ワークＷの形状寸法を変更しないので、ワークＷの形状寸法を高い精度に維持することができる。   (4) Cut into the surface of the conical surface WFa of the flange WF of the workpiece W by plunge grinding which does not average the unevenness of the surface of the rotating grindstone 5 instead of traverse grinding in which the unevenness of the surface of the rotating grindstone 5 is averaged. A rough cutting step S24 for marking is performed. As a result, the surface of the conical surface WFa of the flange WF of the workpiece W that has been once smoothed can be processed to a rough roughness, and a cut mark can be made on the surface of the conical surface WFa of the flange WF of the workpiece W that has been smoothly finished. Since the shape dimension of the workpiece W is not changed simply by attaching, the shape dimension of the workpiece W can be maintained with high accuracy.

なお、本発明は上記実施形態に限定されず、本発明の目的を達成できる範囲で変形、改良などを行っても、本発明の範囲に包含される。
例えば、図３において、円錐面を研削する回転砥石の修正は、回転するドレッサ７４で行う例を示したが、円錐面の回転砥石５の研削面５ｆに接触し得るように、図示しないフォーミングダイヤモンドを先端に取り付けた図示しないバーから構成されたドレッサでドレッシングをしてかまわない。そして、修正されるべき砥石面が図示しないフォーミングダイヤモンドの先端に接触した状態で、回転砥石５とドレッサとの相対送りが研削面５ｆの母線方向に沿って行われることにより、すなわちトラバース送りにより研削面５ｆの修正が行われる。 Note that the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the scope of the present invention.
For example, in FIG. 3, the example of correcting the rotating grindstone that grinds the conical surface is shown by the rotating dresser 74. However, a forming diamond (not shown) may be brought into contact with the grinding surface 5f of the rotating grindstone 5 having the conical surface. Dressing may be performed with a dresser composed of a bar (not shown) attached to the tip. Then, with the grindstone surface to be corrected in contact with the tip of a forming diamond (not shown), relative rotation between the rotating grindstone 5 and the dresser is performed along the generatrix direction of the grinding surface 5f, that is, grinding by traverse feed. The surface 5f is corrected.

１…研削加工装置
５…回転砥石
７４…ドレッサ
Ｗ…ワーク
ＷＦａ…円錐面（加工面） DESCRIPTION OF SYMBOLS 1 ... Grinding machine 5 ... Rotary grindstone 74 ... Dresser W ... Workpiece | work WFa ... Conical surface (processed surface)

Claims (5)

切込み量を数値制御される単一の回転砥石を使用してワークの表面の一部または全面の加工面を所望の面性状に仕上げるために、前記回転砥石で前記加工面を研削する研削工程を有する研削加工方法であって、
前記研削工程は、１次加工と、前記１次加工後の、前記回転砥石における残りの切込み量が零であり、かつ、前記加工面への押圧力が零である２次加工と、前記２次加工後の、前記加工面に切込み跡を付ける加工と、を含むことを特徴とする研削加工方法。 A grinding step of grinding the processed surface with the rotating grindstone in order to finish a part or the entire processed surface of the workpiece to a desired surface property using a single rotating grindstone whose numerical cutting amount is controlled. A grinding method comprising:
The grinding step includes primary processing, secondary processing in which the remaining cutting depth in the rotary grindstone after the primary processing is zero and the pressing force to the processing surface is zero, and the 2 A grinding method, comprising: a step of making a cut mark on the processing surface after the next processing. 前記加工面に切込み跡を付ける加工は、前記加工面に１〜１０数μｍの切込み量で切込む加工であることを特徴とする請求項１記載の研削加工方法。   The grinding method according to claim 1, wherein the process of making a cut mark on the processed surface is a process of cutting the processed surface with a cutting amount of 1 to 10 μm. 前記研削工程の前に、前記回転砥石の表面に沿ってドレスするドレッシング工程を有し、
前記ドレッシング工程では、回転する前記回転砥石にドレッサを当接させつつ、一部において、前記回転砥石の回転速度と前記ドレッサの移動速度の少なくともどちらかを、相対的に速くしたり遅くしたり制御することを特徴とする請求項１または２記載の研削加工方法。 Before the grinding step, having a dressing step of dressing along the surface of the rotating grindstone,
In the dressing step, while a dresser is brought into contact with the rotating grindstone that rotates, at least one of the rotational speed of the rotating grindstone and the moving speed of the dresser is controlled to be relatively faster or slower. The grinding method according to claim 1 or 2, characterized in that: 前記加工面に切込み跡を付ける加工は、回転する前記回転砥石を回転軸の軸方向と直角の方向に移動させて研削するプランジ研削を実施することにより、前記回転砥石の面性状を前記加工面に転写する加工であることを特徴とする請求項１〜３のいずれかに記載の研削加工方法。   In the process of making a cut mark on the machining surface, plunge grinding is performed by moving and rotating the rotating grindstone in a direction perpendicular to the axial direction of the rotation shaft, so that the surface property of the rotating grindstone is changed to the machining surface. The grinding method according to any one of claims 1 to 3, wherein the grinding method is a processing to be transferred to the surface. 切込み量を数値制御される単一の回転砥石を使用してワークの表面の一部または全面の加工面を所望の面性状に仕上げるために、前記回転砥石で前記加工面を研削する手段を有する研削加工装置であって、
前記研削する手段は、１次加工と、前記１次加工後の、前記回転砥石における残りの切込み量が零であり、かつ、前記加工面への押圧力が零である２次加工と、前記２次加工後の、前記加工面に切込み跡を付ける加工と、を実施することを特徴とする研削加工装置。
Means for grinding the processed surface with the rotating grindstone in order to finish a part or the entire processed surface of the workpiece to a desired surface property using a single rotating grindstone whose numerical cutting amount is controlled A grinding device,
The grinding means includes primary processing, secondary processing in which the remaining cutting amount in the rotary grindstone after the primary processing is zero, and the pressing force to the processing surface is zero, A grinding apparatus characterized by performing a process of making a cut mark on the processed surface after secondary processing.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115156921A (en) * 2022-08-19 2022-10-11 浙江宏明水暖科技有限公司 Valve element machining process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115156921A (en) * 2022-08-19 2022-10-11 浙江宏明水暖科技有限公司 Valve element machining process

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