JPH0355160A - Grinding wheel dressing method with rotary dresser - Google Patents
Grinding wheel dressing method with rotary dresserInfo
- Publication number
- JPH0355160A JPH0355160A JP19050889A JP19050889A JPH0355160A JP H0355160 A JPH0355160 A JP H0355160A JP 19050889 A JP19050889 A JP 19050889A JP 19050889 A JP19050889 A JP 19050889A JP H0355160 A JPH0355160 A JP H0355160A
- Authority
- JP
- Japan
- Prior art keywords
- grinding wheel
- grindstone
- diameter
- dia
- speed ratio
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 6
- 239000006061 abrasive grain Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
Landscapes
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野１
本発明はロータリードレッサを有する研削盤の砥石のド
レス方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a method of dressing a grinding wheel of a grinding machine having a rotary dresser.
［従米技術］
一般にロータリードレッサによる砥石の戊形は、第１図
にも示すように、ロータリードレッサの周速Ｖｒと砥石
の周速Ｖｓの周速度比Ｖｒ／Ｖｓにより砥石粗さが依Ｙ
Ｆ Ｌ、周速度比１の時、砥石粗さが最も悪く、砥石の
切味は砥石粗さと逆の関係にあり、周速度比１の時、切
味が最もよい。従米、ロータリードレッサを用いた砥石
のドレスは、初めの砥石径を基にして砥石切味が最適と
なるように砥石およびドレスの周速度比を設定してドレ
スを行うか、あるいはワークの仕上面１］さを基にして
ドレス時の周速度比を決定していた３．
［発明が解決しようとする課題］
しかし砥石の切味は砥石径自体にも依存し、砥石径が小
さい程切味が良くなる。この関係は砥石切味の指標であ
る砥粒切込角１８により説明される。[Conventional technology] Generally, as shown in Fig. 1, when grinding a grinding wheel using a rotary dresser, the roughness of the grinding wheel depends on the circumferential speed ratio Vr/Vs of the circumferential speed Vr of the rotary dresser and the circumferential speed Vs of the grinding wheel.
F L, when the circumferential speed ratio is 1, the grindstone roughness is the worst, and the sharpness of the grindstone has an inverse relationship with the grindstone roughness, and when the circumferential speed ratio is 1, the sharpness is the best. To dress a grinding wheel using a rotary dresser, dress the grinding wheel by setting the circumferential speed ratio of the grinding wheel and dressing to optimize the sharpness of the grinding wheel based on the initial diameter of the grinding wheel, or dress the grinding wheel by setting the circumferential speed ratio of the grinding wheel and dressing to optimize the sharpness of the grinding wheel based on the initial diameter of the grinding wheel. 1] The circumferential speed ratio during dressing was determined based on the 3. [Problems to be Solved by the Invention] However, the cutting quality of a grindstone depends on the diameter of the grindstone itself, and the smaller the diameter of the grindstone, the better the cutting quality. This relationship is explained by the abrasive grain cutting angle 18, which is an index of the cutting quality of the grindstone.
即ち内面研削の場合、砥粒切込角ｉｇはここで Ｄ田；
ワーク径、 ■鴫ワーク周速、Ｖ ｓ＝ Ｉ） ｓ Ｗ
ｓ（ただしＷｓ；砥石回転速度）いま、砥石回転速度Ｗ
ｓを一定として考える。In other words, in the case of internal grinding, the abrasive grain cutting angle ig is:
Work diameter, ■ Work circumferential speed, V s= I) s W
s (however, Ws; grindstone rotation speed) Now, the grindstone rotation speed W
Consider s constant.
砥石径Ｄｓが小さくなると砥粒切込角ｉｇが大きくなり
、切味が良くなることが分る。砥石径による切味の変化
は、内面研削の時特に顕者であり、大きな問題となる。It can be seen that as the grindstone diameter Ds becomes smaller, the abrasive grain cutting angle ig becomes larger and the cutting quality becomes better. Changes in cutting quality due to the diameter of the grinding wheel are particularly noticeable during internal grinding, and become a major problem.
またドレス周ｉ１！度比の点からも砥石径１）ｓが小さ
くなると砥石周速度Ｖ３が小さくなり、したがってドレ
スの周速度比Ｖｒ／Ｖｓが大きくなる。このことは第１
図から砥石面の粗さの劣化、即ち砥石切味が良くなるこ
とを示している。Another dress lap i1! Also from the viewpoint of speed ratio, when the grindstone diameter 1)s becomes smaller, the grindstone circumferential speed V3 becomes smaller, and therefore the dressing circumferential speed ratio Vr/Vs becomes larger. This is the first
The figure shows that the roughness of the grindstone surface deteriorates, that is, the sharpness of the grindstone improves.
以上、砥粒切込角ｉｇ、ドレスの周速度比Ｖｒ／Ｖｓの
２点から砥石径が小さくなるにつれ砥石切味が良くなる
ことが分る。従米の様にドレスあるいは研削作業による
砥石径の変化に拘らず初めの砥石径を基にしてドレス時
の周速度比を決めた場合で、例えば砥石径大の時砥石切
味が最適となるようにドレス時の周速度比を設定すると
、上述のように砥石径小となった時、砥石切味過剰の問
題、即ちワーク仕上面粗さを悪くしたり、砥石摩耗を早
めたりする。逆に砥石径小の時砥石切味が最適となるよ
うにドレス時の周速度比を選ぶと、砥石径大の砥石に対
して砥石切味が悪くなり、切込速度一定の研削では研削
抵抗が高くなり、研削しにくくなるという間迦があった
。From the above two points, the abrasive grain cutting angle ig and the dress circumferential speed ratio Vr/Vs, it can be seen that as the grindstone diameter becomes smaller, the sharpness of the grindstone improves. In cases where the circumferential speed ratio during dressing is determined based on the initial diameter of the grinding wheel, regardless of changes in the diameter of the grinding wheel due to dressing or grinding work, as in the case of jumai, for example, when the diameter of the grinding wheel is large, the sharpness of the grinding wheel is optimized. If the circumferential speed ratio during dressing is set to , as mentioned above, when the diameter of the grinding wheel becomes small, there will be a problem of excessive sharpness of the grinding wheel, that is, it will worsen the roughness of the finished surface of the workpiece and accelerate the wear of the grinding wheel. On the other hand, if the circumferential speed ratio during dressing is selected so that the cutting quality of the grinding wheel is optimal when the diameter of the grinding wheel is small, the cutting quality of the grinding wheel will be poor compared to a grinding wheel with a large diameter, and the grinding resistance will increase when grinding at a constant cutting speed. There was a time when the grinding speed became high and it became difficult to grind.
［課題を解決するための手段１
本発明は、上述した従米の問題点をなくするべく、常に
安定した砥石切味が得られるロータリードレッサによる
砥石ドレス方法を提供するものである。[Means for Solving the Problems 1] The present invention provides a grindstone dressing method using a rotary dresser that can always obtain a stable grindstone sharpness in order to eliminate the above-mentioned problems with the grinding process.
即ち本発明による砥石ドレス方法は、ロータリードレッ
サを備えた研削盤において、砥石径の変化に応じてロー
タリードレッサと砥石の周速度比を変えてドレスを行い
、これに上って砥万径の大小に拘らず砥石切味を安定化
させるものである。That is, the grindstone dressing method according to the present invention performs dressing in a grinding machine equipped with a rotary dresser by changing the circumferential speed ratio of the rotary dresser and the grindstone according to changes in the grindstone diameter, and then adjusts the diameter of the grindstone by changing the circumferential speed ratio of the rotary dresser and the grindstone. This stabilizes the cutting quality of the whetstone regardless of the
［作用］
本発明においては、砥石径の変化に応じてドレス時の砥
石の回転速度を変えるか、ロータリードレッサの回転速
度を変えて砥石とドレツサの周速度比を変える。具体的
には砥石径大の時周速度比を大きくし、砥石径小の時周
速度を小とするので、砥万切味が砥万径の変化に上らず
ほぼ安定する。[Operation] In the present invention, the rotational speed of the grindstone during dressing is changed in accordance with a change in the diameter of the grindstone, or the rotational speed of the rotary dresser is changed to change the circumferential speed ratio between the grindstone and the dresser. Specifically, the time-peripheral speed ratio of the large-diameter grindstone is made large, and the time-peripheral speed of the small-diameter grindstone is made small, so that the cutting quality of the abrasive does not increase with changes in the abrasive diameter and is almost stable.
［実施例１
次に、本発明を実施例について図面を参照して説明する
。[Example 1] Next, an example of the present invention will be described with reference to the drawings.
第２図は本発明に適用される研削盤の概略的な平面図で
ある。研削盤のベッド９−ＬにＸ方向に移動可能な砥石
送りテーブル７およびＹ方向に移動可能な切込送りテー
ブル８が搭載されている。４は砥石送りテーブル７の駆
動モータ、５は切込送りテーブル８の駆動モータであり
、それぞれベッド９に取り付けられている。切込送りテ
ーブル８上にはワー２１０を保持する主軸台１１および
主軸モータ１２が載置され、また該テーブル８上にロー
タリードレッサ２およびその駆動モータ１３が載せられ
ている。２ａはドレッサ軸を支持しでいるドレッサハウ
ジングである。砥石送りテーブル７上には砥石１を回転
駆動するための砥石スピンドル装置６が搭載されている
。図示のようにロータリードレッサ２は砥石１の後方に
位置してオ；り、ドレスのための切込は駆動モータ５に
よりロータリードレッサ２が前方へ移動し、ドレッサ２
と砥石１が回転状態で接触することにより砥石外周面の
戒形がなされる。FIG. 2 is a schematic plan view of a grinding machine applied to the present invention. A grindstone feed table 7 movable in the X direction and a cut feed table 8 movable in the Y direction are mounted on the bed 9-L of the grinding machine. Reference numeral 4 indicates a drive motor for the grindstone feed table 7, and 5 indicates a drive motor for the incision feed table 8, which are each attached to the bed 9. A headstock 11 for holding a workpiece 210 and a spindle motor 12 are placed on the cutting feed table 8, and a rotary dresser 2 and its drive motor 13 are placed on the table 8. 2a is a dresser housing that supports the dresser shaft. A grindstone spindle device 6 for rotationally driving the grindstone 1 is mounted on the grindstone feeding table 7 . As shown in the figure, the rotary dresser 2 is located behind the grinding wheel 1, and the cut for dressing is made by moving the rotary dresser 2 forward by the drive motor 5.
When the whetstone 1 comes into contact with the whetstone 1 in a rotating state, the outer peripheral surface of the whetstone is shaped.
第１の実施例として砥石回転速度が一定でロータリード
レッサ２の回転速度を変える場合を説明する。第１図で
砥石使用最大径Ｄｍａｘにおける周速度比をａに選んだ
とする。砥石使用最小径Ｄｍｉｎに一５
Ｄｍａｘ
おける周速度比はａ×一τ→ａとなり、第１図１）ｎ＋
＋ｎ
からも分るように砥石Ｉｌｌさを悪くし、砥石切味を過
剰にする。また前述の砥粒切込角度ｉｇの点からも砥石
切味は過剰になる。そこでロータリードレツサ２の回転
速度Ｗｒを下げてドレ・冫サ２と砥石１の周速度比Ｖｒ
／Ｖｓをａよりも低り１値ｂに設定する。ｂの値は試行
錯誤的に実験により決定する。As a first embodiment, a case will be described in which the rotation speed of the rotary dresser 2 is changed while the rotation speed of the grindstone is constant. In FIG. 1, it is assumed that the circumferential speed ratio at the maximum diameter Dmax of the grindstone used is selected to be a. The circumferential speed ratio when the minimum diameter of the grinding wheel used Dmin is -5 Dmax is a×1τ → a, and Fig. 1 1) n+
As can be seen from +n, it makes the sharpness of the whetstone worse and makes the sharpness of the whetstone excessive. Also, the sharpness of the grindstone becomes excessive in view of the abrasive grain cutting angle ig mentioned above. Therefore, the rotational speed Wr of the rotary dresser 2 is lowered to increase the peripheral speed ratio Vr of the dresser 2 and the grinding wheel 1.
/Vs is set to 1 value b, which is lower than a. The value of b is determined through trial and error experiments.
このようにして砥石径Ｄｍａｘ．，Ｄｍｉｎ．における
砥石切味をほぼ同一にする。ｌ）ｍａｘとＤ＋＋＋ｉｎ
の途中の砥石径に対しては第３図のように砥石径を段階
的に分割し、それに応じて周速度比を段階的に決める。In this way, the grinding wheel diameter Dmax. , Dmin. The cutting quality of the whetstone is almost the same. l) max and D+++in
For a grindstone diameter in the middle of , the grindstone diameter is divided in stages as shown in Fig. 3, and the circumferential speed ratio is determined in stages accordingly.
なお、ロータリードレツサ２の回転速度の変更は例えば
インバータにより駆動モータ１３を制御して行う。Note that the rotational speed of the rotary dresser 2 is changed by controlling the drive motor 13 using, for example, an inverter.
第２の実施例は、ロータリードレツサ２の回転速度Ｗｒ
を一定とし、ドレス時のみ砥′Ｆｉ１の回転速度Ｗｓを
砥石径に応じて変化させる。即ち砥石使用最小径Ｄｍｉ
ｎでのドレ大では、砥石回転速度ＷＳは研削時の回転速
度とし、ロータリードレツサ回転速度Ｗｒを適切な値に
選定し、周速度比Ｖｒ／一〇一
Ｖｓを決定する。砥石使用最大径Ｄｍａκでは、砥石回
転速度Ｖｓは低くして周速度比Ｖｒ／Ｖｓを高くする。In the second embodiment, the rotational speed Wr of the rotary dresser 2
is kept constant, and the rotational speed Ws of the grinding wheel 'Fi1 is changed according to the diameter of the grinding wheel only during dressing. In other words, the minimum diameter of the grinding wheel Dmi
In the case of large draping at n, the grinding wheel rotational speed WS is set to the rotational speed during grinding, the rotary dresser rotational speed Wr is selected to an appropriate value, and the circumferential speed ratio Vr/101Vs is determined. When the maximum diameter of the grindstone used is Dmaκ, the grindstone rotational speed Vs is lowered and the circumferential speed ratio Vr/Vs is increased.
砥石径の最大と最小の途中では砥石径を第１の実施例と
同様に段階的に分割し、それに応じて周速皮比を段階的
に変更する。砒石回転速度の変更も同様にインバータ等
による砥石スピンドル装置６の制御で行うことができる
。In the middle between the maximum and minimum diameter of the grindstone, the diameter of the grindstone is divided in stages as in the first embodiment, and the circumferential speed skin ratio is changed in stages accordingly. Similarly, the abrasive wheel rotation speed can be changed by controlling the abrasive wheel spindle device 6 using an inverter or the like.
１発明の効果］
以上説明したように本発明によれば、砥石径の変化に応
じてロータリードレッサと砥石の周速度比を変え、砥石
径大の時周速度比を大きくし、砥石径小の時周速度比を
小とするようにしたので、砥石切味が使用砥石径の変化
に関係なく安定化させることができる効果がある。1. Effects of the invention] As explained above, according to the present invention, the peripheral speed ratio of the rotary dresser and the grinding wheel is changed according to the change in the grinding wheel diameter, the time-peripheral speed ratio of the large grinding wheel is increased, and the circumferential speed ratio of the grinding wheel with a small diameter is increased. Since the time-to-periphery speed ratio is made small, there is an effect that the sharpness of the grindstone can be stabilized regardless of changes in the diameter of the grindstone used.
１２１図は砥石面有効粗さに対するドレス周速度比の関
係を示した図、第２図は本発明に適用されるロータリー
ドレッサを備えた研削盤の一例を示す平面図、弟３図は
砥石径に対するドレス周速度比の選定例を示す図である
。
・・砥石、 ２・・・ロータリ
４、５、１３・・・駆動モータ、
・砥石スピンドル装置、
・砥万送リテーブル、
・切込送りテーブル、 １０・・
ドレッFig. 121 is a diagram showing the relationship between the dressing peripheral speed ratio and the effective roughness of the grinding wheel surface, Fig. 2 is a plan view showing an example of a grinding machine equipped with a rotary dresser applied to the present invention, and Fig. 3 is a diagram showing the relationship between the grinding wheel diameter It is a figure which shows the selection example of the dressing circumferential speed ratio with respect to FIG. ... Grinding wheel, 2... Rotary 4, 5, 13... Drive motor, - Grinding wheel spindle device, - Grinding feed retable, - Cutting feed table, 10... Dredge
Claims (1)
おいて、砥石径の変化に応じてロータリードレッサと砥
石の周速度比を変えてドレスを行うことを特徴とする砥
石ドレス方法。A grinding wheel dressing method for a grinding machine equipped with a rotary dresser, characterized in that dressing is performed by changing the circumferential speed ratio of the rotary dresser and the grinding wheel according to a change in the grinding wheel diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19050889A JPH0355160A (en) | 1989-07-25 | 1989-07-25 | Grinding wheel dressing method with rotary dresser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19050889A JPH0355160A (en) | 1989-07-25 | 1989-07-25 | Grinding wheel dressing method with rotary dresser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0355160A true JPH0355160A (en) | 1991-03-08 |
Family
ID=16259258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19050889A Pending JPH0355160A (en) | 1989-07-25 | 1989-07-25 | Grinding wheel dressing method with rotary dresser |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0355160A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0679595A (en) * | 1992-06-18 | 1994-03-22 | Bando Chem Ind Ltd | Belt grinding device |
| JP2010520072A (en) * | 2007-03-01 | 2010-06-10 | モリ・セイキ・ユーエスエー・インコーポレーテッド | Machine tool having grinding wheel and grinding wheel dresser |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61188077A (en) * | 1985-02-14 | 1986-08-21 | Alps Electric Co Ltd | Truing device |
-
1989
- 1989-07-25 JP JP19050889A patent/JPH0355160A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61188077A (en) * | 1985-02-14 | 1986-08-21 | Alps Electric Co Ltd | Truing device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0679595A (en) * | 1992-06-18 | 1994-03-22 | Bando Chem Ind Ltd | Belt grinding device |
| JP2010520072A (en) * | 2007-03-01 | 2010-06-10 | モリ・セイキ・ユーエスエー・インコーポレーテッド | Machine tool having grinding wheel and grinding wheel dresser |
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