JPH0146252B2 - - Google Patents
Info
- Publication number
- JPH0146252B2 JPH0146252B2 JP59231081A JP23108184A JPH0146252B2 JP H0146252 B2 JPH0146252 B2 JP H0146252B2 JP 59231081 A JP59231081 A JP 59231081A JP 23108184 A JP23108184 A JP 23108184A JP H0146252 B2 JPH0146252 B2 JP H0146252B2
- Authority
- JP
- Japan
- Prior art keywords
- grindstone
- workpiece
- thread groove
- dresser
- thread
- 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 12
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000006061 abrasive grain Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/36—Thread cutting; Automatic machines specially designed therefor by grinding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は雌ねじのねじ溝研削方法とその装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for grinding a thread groove of a female thread.
雌ねじのねじ溝研削方法として従来から行なわ
れている方法は、予め砥石をドレツサによつて所
定の溝形状にドレツシングし、砥石軸をねじ溝リ
ード角だけ傾斜せしめ、ワークと砥石を回転させ
ると共に軸方向に送りをかけながら研削を行なう
ものである。
The conventional method for grinding thread grooves on female threads is to dress a grindstone in advance into a predetermined groove shape using a dresser, tilt the grindstone shaft by the thread groove lead angle, rotate the workpiece and the grindstone, and rotate the shaft. Grinding is performed while applying feed in the direction.
しかし、上記の方法によると、リード角が大き
に場合、ねじ穴が長い場合、或いはねじ穴径が小
さい場合は、砥石軸とねじ穴内周面との干渉を避
けるために、砥石軸の径を小さく形成する必要が
あり、また場合によつてはこのような方法による
研削ができないことがある。 However, according to the above method, when the lead angle is large, the threaded hole is long, or the diameter of the threaded hole is small, the diameter of the grinding wheel shaft must be adjusted to avoid interference between the grinding wheel shaft and the inner peripheral surface of the threaded hole. It is necessary to form it small, and in some cases it may not be possible to grind it by such a method.
このような欠点を解消するために、第７図に示
すごとき雌ねじのねじ溝研削方法が提案されてい
る（特開昭57−83320号公報参照）。 In order to eliminate these drawbacks, a method of grinding the thread groove of a female thread as shown in FIG. 7 has been proposed (see Japanese Patent Application Laid-open No. 83320/1983).
この方法は、砥石軸２０をワーク２１のねじ穴
２２の軸芯と平行に設定し、その軸芯に対してね
じ溝２３のリード角θだけ傾けた回転中心を有す
るリング状ドレツサ２４を設置し、そのドレツサ
２４の内周面に上記ねじ溝２３と同一径でかつ断
面形状の等しい環状ドレツシング面２５を形成し
た装置を用い、砥石２６をドレツサ２４において
ドレツシングしたのち、砥石軸２０をワーク２１
のねじ穴２２の軸芯と平行に保ちながら切込み方
向へ移動してねじ溝２３を研削するようにしたも
のである。 In this method, a grindstone shaft 20 is set parallel to the axis of a threaded hole 22 of a workpiece 21, and a ring-shaped dresser 24 is installed whose rotation center is inclined by a lead angle θ of a thread groove 23 with respect to the axis. After dressing the grindstone 26 in the dresser 24 using a device in which an annular dressing surface 25 having the same diameter and the same cross-sectional shape as the thread groove 23 is formed on the inner peripheral surface of the dresser 24, the grindstone shaft 20 is attached to the workpiece 21.
The thread groove 23 is ground by moving in the cutting direction while keeping the thread parallel to the axis of the threaded hole 22.
上記の方法によると、砥石軸２０の軸芯に対し
ドレツサ２４の回転中心がリード角θだけ傾斜し
ているため、砥石軸２０の軸方向から見たドレツ
シング面２５は、第８図に示すように楕円形をな
し、その楕円度（長軸と短軸の長さの比）はリー
ド角θが大きくなるほど大になる。
According to the above method, since the rotation center of the dresser 24 is inclined by the lead angle θ with respect to the axis of the grinding wheel shaft 20, the dressing surface 25 seen from the axial direction of the grinding wheel shaft 20 is as shown in FIG. It has an elliptic shape, and its ellipticity (ratio of the length of the major axis to the minor axis) increases as the lead angle θ increases.
そのため、リード角θが一定以上に大きくなる
と、楕円の長軸頂部付近において砥石２６がドレ
ツシング面２５に接触できない範囲（第８図の符
号ａ参照）が存在するようにもなり、理想的なド
レス形状からのずれが全般に大になるという欠点
がある。 Therefore, if the lead angle θ increases beyond a certain level, there will be a range (see reference numeral a in FIG. 8) in which the grinding wheel 26 cannot contact the dressing surface 25 near the top of the long axis of the ellipse, resulting in ideal dressing. The disadvantage is that deviations from the shape are generally large.
上記の問題点を解決するために、この発明は、
ワークのねじ溝と同一構成のねじ溝でなるドレツ
シング面を設けたドレツサに砥石軸を平行に挿入
し、その砥石をドレツシングしたのち、砥石軸を
上記と同じ角度関係を保持してワークのねじ穴内
に挿入してねじ溝を研削するようにした研削方法
を提供するものである。
In order to solve the above problems, this invention
Insert the grindstone shaft parallel to a dresser that has a dressing surface with thread grooves of the same configuration as the thread grooves on the workpiece, dress the grindstone, and then insert the grindstone shaft into the threaded hole of the workpiece while maintaining the same angular relationship as above. The present invention provides a grinding method in which a thread groove is ground by inserting the thread into the thread groove.
また、同じく上記の問題点を解決するために、
この発明はドレツサを備えた研削装置において、
ドレツサのドレツシング面を、研削すべき雌ねじ
のねじ溝と同一構成のねじ溝によつて形成した研
削装置を提供するものである。 Also, in order to solve the above problem,
This invention provides a grinding device equipped with a dresser.
The present invention provides a grinding device in which a dressing surface of a dresser is formed by a thread groove having the same configuration as a thread groove of a female thread to be ground.
第１図は上記の方法およびその方法を実施する
ための装置を示している。
FIG. 1 shows the method described above and an apparatus for carrying out the method.
この装置は、研削盤主軸に対して芯出しされた
ホルダ１をチヤツク２により把持し、そのホルダ
１の先端部においてワーク３（ボールねじナツ
ト）を押えねじ４によつて固定するとともに、そ
のワーク３から一定距離だけ後方に離れた位置に
おいてリング状のドレツサ５を押えねじ６によつ
てホルダ１に固定したものであり、ワーク３のね
じ穴７とドレツサ５の穴８の径は同一であり、か
つ同一の回転軸芯上にある。 This device grips a holder 1 centered with respect to the grinding machine spindle with a chuck 2, fixes a workpiece 3 (ball screw nut) at the tip of the holder 1 with a holding screw 4, and A ring-shaped dresser 5 is fixed to the holder 1 by a holding screw 6 at a position a certain distance backward from the workpiece 3, and the diameters of the screw hole 7 of the workpiece 3 and the hole 8 of the dresser 5 are the same. , and are on the same rotation axis.
上記ワーク３のねじ穴７にはボールねじ溝９が
形成され、またドレツサ５の穴８には上記のワー
ク３のねじ研削完了時のボールねじ溝９と同一構
成のねじ溝でなるドレツシング面１０、すなわち
半径、断面形状およびピツチが同一のねじ溝でな
るドレツシング面１０が形成されている。このド
レツシング面１０は穴８の一周ないし一周半程度
の長さをもつように形成され、ダイヤモンド砥粒
が固着される。 A ball screw groove 9 is formed in the screw hole 7 of the workpiece 3, and a dressing surface 10 is formed in the hole 8 of the dresser 5, which has the same configuration as the ball screw groove 9 of the workpiece 3 when thread grinding is completed. That is, the dressing surface 10 is formed of thread grooves having the same radius, cross-sectional shape, and pitch. This dressing surface 10 is formed to have a length of about one or one-and-a-half circumferences of the hole 8, and diamond abrasive grains are fixed thereto.
また、上記のドレツサ５とワーク３間の距離
は、位相合せ機を用いてドレツシング面１０とね
じ溝９のねじ位相が一致する距離に設定される。
その結果、両者の間に図の一点鎖線で示すごとき
ねじ溝を仮想した場合、ドレツシング面１０とね
じ溝９は一本の連続したねじ溝を形成する。 Further, the distance between the dresser 5 and the workpiece 3 is set to a distance where the thread phases of the dressing surface 10 and the thread groove 9 match using a phase matching machine.
As a result, if a thread groove as shown by the dashed line in the figure is imagined between the two, the dressing surface 10 and the thread groove 9 form one continuous thread groove.
上記ホルダ１は、研削盤主軸によつて回転され
るとともに、軸方向に送りがかけられる。 The holder 1 is rotated by the main shaft of the grinding machine and is fed in the axial direction.
一方、砥石１１は砥石軸１２に固定され、砥石
軸１２はスピンドル１３に保持される。スピンド
ル１３は研削盤主軸に対して平行移動する台（図
示省略）上に支持され、砥石軸１２を回転させる
とともに、これを研削切込み方向に移動させる。 On the other hand, the grindstone 11 is fixed to a grindstone shaft 12, and the grindstone shaft 12 is held by a spindle 13. The spindle 13 is supported on a table (not shown) that moves parallel to the main axis of the grinding machine, and rotates the grindstone shaft 12 and moves it in the direction of the cutting depth of the grinding machine.
また、回転と送りのかかつたドレツサ５のドレ
ツシング面１０に、砥石１１をスムーズに嵌まり
込ませるために、予め同期原点が設定される。す
なわち、主軸の回転と送りの連結を切つて主軸を
回転させることにより、砥石１１がドレツシング
面１０の端に入る位置を原点として設定し、以後
砥石１１の交換時までこの同期関係を維持する。 Further, in order to smoothly fit the grindstone 11 into the dressing surface 10 of the dresser 5 which is being rotated and fed, a synchronization origin is set in advance. That is, by disconnecting the rotation and feed of the main shaft and rotating the main shaft, the position where the grindstone 11 enters the end of the dressing surface 10 is set as the origin, and this synchronous relationship is maintained from then on until the grindstone 11 is replaced.
このような準備を終了したのち、主軸の回転と
送りによつてドレツサ５に回転と送りを与えると
ともに、砥石軸１２を回転しかつ平行移動して砥
石１１をドレツシング面１０に接触させ、（第１
図の一点鎖線参照）所要の切込みを付与してドレ
ツシングを行なう。 After completing these preparations, the main shaft rotates and feeds the dresser 5, and the grindstone shaft 12 is rotated and translated in parallel to bring the grindstone 11 into contact with the dressing surface 10. 1
(Refer to the dashed line in the figure) Make the required cuts and perform dressing.
ドレツシングを終えるとワーク３のねじ溝９の
研削に移行する。この場、研削による取代ろ分だ
け半径方向に逃げておく。またドレツシングの場
合と回転および送りの同期を保持することによ
り、砥石１１はワーク３のねじ溝９にスムーズに
移行する。 After finishing the dressing, the process moves on to grinding the thread groove 9 of the workpiece 3. At this point, the amount of machining allowance due to grinding is allowed to escape in the radial direction. Further, by maintaining the synchronization of rotation and feeding as in the case of dressing, the grindstone 11 is smoothly transferred to the thread groove 9 of the workpiece 3.
なお、砥石軸１２にも送りを付与してもよい。
また、砥石軸１２は支障のない範囲で、ワーク３
のねじ穴７またはドレツサ５の穴８の軸芯に対し
一定角度傾斜させることができる。 Note that the grindstone shaft 12 may also be fed.
In addition, the grinding wheel spindle 12 should be adjusted to the workpiece 3 within a range that does not cause any hindrance.
or the hole 8 of the dresser 5 at a certain angle.
上記の実施例において、ドレツシング状態にお
けるドレツシング面１０と砥石１１の接触部位は
第２図から第６図に示すように、ドレツシング面
１０の溝Ｒ形状、リードおよびBCD（Ball
Circular−Diameter）によつて決まる曲線ｂと
なり、砥石１１の外周面はドレツシング面１０に
すき間無く接触する。 In the above embodiment, the contact areas between the dressing surface 10 and the grinding wheel 11 in the dressing state are as shown in FIGS. 2 to 6.
The outer peripheral surface of the grinding wheel 11 comes into contact with the dressing surface 10 without any gaps.
ところで、以上述べた実施例は、ワーク３のね
じ穴７とドレツサ５の穴８とが同一軸芯上にある
よう設置されているが、この発明は両者がこのよ
うな位置関係にあることにこだわるものではな
い。すなわち、両者の軸芯が平行になるような位
置関係に設定してもよく、或いは両者の軸芯が交
差するような位置関係に設定してもよい。要はド
レツサ５をワーク３の近傍に設置し、砥石軸１２
のスピンドル１３を適当な移送装置に支持せし
め、その移送装置によつて砥石１１をドレツサ５
とワーク３間で移送するようにすればよい。ま
た、その場合、ドレツサ５とワーク３は同期回転
され、砥石１１とドレツサ５、砥石１１とワーク
３とは、それぞれ同期原点が設定される。 By the way, in the embodiment described above, the screw hole 7 of the workpiece 3 and the hole 8 of the dresser 5 are installed so as to be on the same axis, but the present invention does not require that the two be in such a positional relationship. It's not something I'm particular about. That is, the positional relationship may be set such that both axes are parallel, or the positional relationship may be set such that both axes intersect. In short, the dresser 5 is installed near the workpiece 3, and the grinding wheel shaft 12 is
The spindle 13 of
It is only necessary to transfer the workpiece between the workpiece and the workpiece 3. Further, in that case, the dresser 5 and the workpiece 3 are rotated synchronously, and the synchronous origins are set for the grindstone 11 and the dresser 5, and for the grindstone 11 and the workpiece 3, respectively.
また、以上の説明は専らねじ溝の研削加工につ
いて述べているが、この発明はねじ溝のラツピン
グにも適用することができる。したがつて、この
発明において砥石というのは、ラツプ（例えば木
材）を含む広い概念であり、またドレツサの材質
もラツプの材質に合わせて選定される。 Further, although the above description has been exclusively about grinding thread grooves, the present invention can also be applied to wrapping thread grooves. Therefore, in this invention, the term "grindstone" is a broad concept that includes laps (for example, wood), and the material of the dresser is also selected in accordance with the material of the laps.
以上述べたように、この発明によると、研削に
先立つて行なう砥石のドレツシングを、研削すべ
きねじ溝と同一のねじ溝からなるドレツシング面
によつて行なうので、ねじ溝のリード角の大きさ
如何にかかわらず、砥石外周面がドレツシング面
に理想形状とのずれが無く接するので、精度の良
いドレツシングを行なうことができる。
As described above, according to the present invention, since the dressing of the grindstone prior to grinding is performed using the dressing surface consisting of the same thread groove as the thread groove to be ground, the size of the lead angle of the thread groove can be adjusted. Regardless of the shape, the outer circumferential surface of the grinding wheel contacts the dressing surface without deviation from the ideal shape, so dressing can be performed with high precision.
また、ドレツシング面の周回数を砥粒の大きさ
等に応じて適宜変えることができる。 Further, the number of turns of the dressing surface can be changed as appropriate depending on the size of the abrasive grains.
第１図はこの発明の実施例の断面図、第２図は
同上のドレツシング状態の一部拡大断面図、第３
図から第６図はそれぞれ第２図のX3，X4，X5お
よびX6矢印における断面図、第７図は従来例の
断面図、第８図は第７図のX8矢印における断面
図である。
１…ホルダ、２…チヤツク、３…ワーク、５…
ドレツサ、７…ねじ穴、８…穴、９…ねじ溝、１
０…ドレツシング面、１１…砥石、１２…砥石
軸、１３…スピンドル。
FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a partially enlarged sectional view of the same dressing state, and FIG.
Figures 6 to 6 are cross-sectional views taken along arrows X 3 , X 4 , X 5 and It is a diagram. 1...Holder, 2...Chuck, 3...Workpiece, 5...
Dresser, 7...Threaded hole, 8...Hole, 9...Thread groove, 1
0... Dressing surface, 11... Grinding wheel, 12... Grinding wheel shaft, 13... Spindle.
Claims (1)
をワークのねじ穴内に挿入し、砥石軸をワークね
じ穴の軸芯に対し平行に保持してねじ溝を研削す
る雌ねじのねじ溝研削方法において、ドレツシン
グ面を上記ワークのねじ溝と同一構成のねじ溝に
より形成したドレツサに、上記ワークのねじ穴に
対する関係と同じ角度関係を保持しながら砥石軸
を挿入して砥石をドレツシングすることを特徴と
する雌ねじのねじ溝研削方法。 ２ 雌ねじを有するワークのホルダと、内周面に
ドレツシング面を形成したドレツサと、砥石を固
定した砥石軸からなり、砥石軸をドレツサおよび
ワークに対して平行に保持して砥石のドレツシン
グおよびワークねじ溝の研削を行なうようにした
雌ねじのねじ溝研削装置において、上記ドレツサ
のドレツシング面を上記ワークのねじ溝と同一構
成のねじ溝によつて形成したことを特徴とする雌
ねじのねじ溝研削装置。[Claims of Claims] 1. Thread groove grinding of a female thread in which a grindstone that has been dressed in advance by a dresser is inserted into a threaded hole of a workpiece, and the grindstone shaft is held parallel to the axis of the workpiece threaded hole to grind the thread groove. In this method, a grindstone is dressed by inserting a grindstone spindle into a dresser whose dressing surface is formed by a thread groove having the same configuration as the thread groove of the work, while maintaining the same angular relationship with the thread hole of the work. Characteristic female thread thread groove grinding method. 2 Consists of a workpiece holder with a female thread, a dresser with a dressing surface formed on the inner peripheral surface, and a grindstone shaft to which a grindstone is fixed, and the grindstone shaft is held parallel to the dresser and the workpiece to dress the grindstone and screw the workpiece. A female thread thread groove grinding device for grinding grooves, characterized in that the dressing surface of the dresser is formed by a thread groove having the same configuration as the thread groove of the workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59231081A JPS61109612A (en) | 1984-10-31 | 1984-10-31 | Polishing method and device for thread groove of female screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59231081A JPS61109612A (en) | 1984-10-31 | 1984-10-31 | Polishing method and device for thread groove of female screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61109612A JPS61109612A (en) | 1986-05-28 |
| JPH0146252B2 true JPH0146252B2 (en) | 1989-10-06 |
Family
ID=16917987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59231081A Granted JPS61109612A (en) | 1984-10-31 | 1984-10-31 | Polishing method and device for thread groove of female screw |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61109612A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6310917Y2 (en) * | 1985-07-08 | 1988-03-31 | ||
| DE3624472A1 (en) * | 1986-07-19 | 1988-01-28 | Schaudt Maschinenbau Gmbh | METHOD AND MACHINE FOR GRINDING INTERNAL THREAD |
| JP3307809B2 (en) * | 1995-10-05 | 2002-07-24 | 兼房株式会社 | Rotary tool with shank |
| SE517192C2 (en) * | 1999-02-26 | 2002-05-07 | Sandvik Ab | Utilities Connection |
| JP4523304B2 (en) * | 2004-03-10 | 2010-08-11 | ケーエスエス株式会社 | Ball screw surface lapping device |
| CN116532728B (en) * | 2023-06-08 | 2024-01-26 | 浙江裕泰汽车配件有限公司 | Burr removing equipment for machining automobile screws |
-
1984
- 1984-10-31 JP JP59231081A patent/JPS61109612A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61109612A (en) | 1986-05-28 |
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