JPH0911108A - Grinder - Google Patents

Grinder

Info

Publication number
JPH0911108A
JPH0911108A JP16622995A JP16622995A JPH0911108A JP H0911108 A JPH0911108 A JP H0911108A JP 16622995 A JP16622995 A JP 16622995A JP 16622995 A JP16622995 A JP 16622995A JP H0911108 A JPH0911108 A JP H0911108A
Authority
JP
Japan
Prior art keywords
grindstone
slide table
spindle head
work
ball screw
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.)
Granted
Application number
JP16622995A
Other languages
Japanese (ja)
Other versions
JP3306485B2 (en
Inventor
Hiroshi Honda
▲ひろ▼司 本田
Tetsuji Komatsu
哲治 小松
Tatsuji Fukada
達司 深田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP16622995A priority Critical patent/JP3306485B2/en
Publication of JPH0911108A publication Critical patent/JPH0911108A/en
Application granted granted Critical
Publication of JP3306485B2 publication Critical patent/JP3306485B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE: To improve a follow-up property of a grinding wheel spindle head mounting slide table to NC control for working a workpiece with high accuracy in an NC-control system grinder. CONSTITUTION: A grinding wheel spindle head 15 is mounted to the front end of slide table 12 moved forward and backward through a ball screw mechanism 11 by a drive source such that a grinding wheel spindle head 15 in the axial center position coincides with the axis of the ball screw mechanism 11 as viewed in a plan. A grinding reaction will be received by the ball screw mechanism 11 without exerting inclining moment laterally to the slide table 12 to improve the follow-up property of the slide table 12 to NC control. Also, the grinding wheel spindle head 15 is mounted to the slide table 12 with the posture inclined forward downward. Thus, the height of the grinding wheel 18 is reduced, the vertical distance between the action line of the grinding reaction and the axis of the ball screw mechanism 11 is shortened and the vertically inclining moment acting on the slide table 12 is reduced.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、エンジン用動弁カム等
のワークを研削する研削盤に関し、特に、NC制御式の
研削盤に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding machine for grinding a work such as an engine valve cam, and more particularly to an NC control type grinding machine.

【0002】[0002]

【従来の技術】従来、この種の研削盤は、特開昭63−
109970号公報に見られるように、ワークを支持す
るワーク支持ユニットと、ワーク支持ユニットに向けて
進退されるスライドテーブル上に、円板状の砥石を取付
けた砥石スピンドルヘッドを砥石の軸方向がスライドテ
ーブルの進退方向に直交する方向を向くように搭載して
成る砥石支持ユニットとを備え、スライドテーブルを駆
動源によりボールねじ機構を介してNC制御で進退させ
てワークを研削するようにしている。このもので、砥石
スピンドルヘッドは、スライドテーブルの一側方に砥石
を張り出させた状態で、スライドテーブル上に取付けら
れている。
2. Description of the Related Art Conventionally, a grinding machine of this type has been disclosed in JP-A-63-
As can be seen in Japanese Patent Laid-Open No. 109970, a grindstone spindle head having a disk-shaped grindstone mounted on a work support unit that supports a work and a slide table that moves back and forth toward the work support unit slides in the axial direction of the grindstone. A grindstone support unit mounted so as to be oriented in a direction orthogonal to the advancing / retreating direction of the table is provided, and the slide table is moved forward / backward by NC control via a ball screw mechanism by a drive source to grind a workpiece. With this, the grindstone spindle head is mounted on the slide table with the grindstone protruding to one side of the slide table.

【0003】[0003]

【発明が解決しようとする課題】上記従来の研削盤で
は、砥石からの研削反力により、スライドテーブルに、
これをその進退方向と直交方向に傾動させようとする傾
動モーメントが作用し、NC制御に対するスライドテー
ブルの追従性が悪くなり、加工精度の高度化が困難にな
る。本発明は、以上の点に鑑み、NC制御に対するスラ
イドテーブルの追従性を向上させた研削盤を提供するこ
とをその目的としている。
In the above conventional grinding machine, the reaction force from the grindstone causes the slide table to move.
A tilting moment for tilting this in a direction orthogonal to the advancing / retreating direction acts, the followability of the slide table for NC control deteriorates, and it becomes difficult to improve machining accuracy. The present invention has been made in view of the above points, and an object thereof is to provide a grinding machine with improved followability of a slide table to NC control.

【0004】[0004]

【課題を解決するための手段】上記目的を達成すべく、
本発明は、ワークを支持するワーク支持ユニットと、ワ
ーク支持ユニットに向けて進退されるスライドテーブル
上に、円板状の砥石を取付けた砥石スピンドルヘッドを
砥石の軸方向がスライドテーブルの進退方向に直交する
方向を向くように搭載して成る砥石支持ユニットとを備
え、スライドテーブルを駆動源によりボールねじ機構を
介してNC制御で進退させてワークを研削する研削盤に
おいて、スライドテーブルのワーク支持ユニット側の端
部に、砥石の軸方向中心位置が平面視でボールねじ機構
の軸線に略合致するような位置関係で砥石スピンドルヘ
ッドを取付けることを特徴とする。この場合、砥石スピ
ンドルヘッドのハウジングにワーク支持ユニットとは反
対方向に張り出す取付ベースを設け、スライドテーブル
の前記端部の上面にワーク支持ユニットに向けて前下り
に傾斜する取付面を形成し、該取付面に取付ベースを着
座させて固定することが望ましい。
In order to achieve the above object,
The present invention provides a work support unit for supporting a work, and a grindstone spindle head having a disk-shaped grindstone mounted on a slide table that is advanced and retracted toward the work support unit. In a grinder for grinding a work by including a grindstone support unit mounted so as to face in a direction orthogonal to each other, the slide table is advanced and retracted by a drive source through a ball screw mechanism under NC control, and a work support unit for the slide table. It is characterized in that the grindstone spindle head is attached to the end portion on the side in such a positional relationship that the axial center position of the grindstone substantially coincides with the axis of the ball screw mechanism in a plan view. In this case, the housing of the grindstone spindle head is provided with a mounting base that projects in the opposite direction to the work supporting unit, and a mounting surface that slopes forward and downward toward the work supporting unit is formed on the upper surface of the end of the slide table, It is desirable to seat and fix the mounting base on the mounting surface.

【0005】[0005]

【作用】砥石からの研削反力の作用線がボールねじ機構
の軸線に対しスライドテーブルの進退方向と直交方向に
オフセットせず、そのため、研削反力をスライドテーブ
ルに前記直交方向の傾動モーメントを作用させずにボー
ルねじ機構で受けられるようになり、NC制御に対する
スライドテーブルの追従性が向上する。また、上記の如
く前下りに傾斜した取付面にハウジングの取付ベースを
固定すれば、砥石スピンドルヘッドが前下りの傾斜姿勢
でスライドテーブルに取付けられることになり、砥石の
配置高さを下げることができる。その結果、研削反力の
作用線とボールねじ機構の軸線との間の上下方向の距離
が短縮され、研削反力によってスライドテーブル12に
作用する上下方向の傾動モーメントが軽減されて、NC
制御に対するスライドテーブルの追従性が一層向上す
る。
[Operation] The line of action of the grinding reaction force from the grindstone does not offset in the direction orthogonal to the slide table advancing / retracting direction with respect to the axis of the ball screw mechanism. Therefore, the grinding reaction force acts on the slide table with the tilting moment in the orthogonal direction. It can be received by the ball screw mechanism without doing so, and the followability of the slide table for NC control is improved. Further, if the mounting base of the housing is fixed to the mounting surface which is inclined forward and downward as described above, the grindstone spindle head can be attached to the slide table in the inclined posture which is inclined forward and downward, and the height of the grindstone can be lowered. it can. As a result, the vertical distance between the line of action of the grinding reaction force and the axis of the ball screw mechanism is shortened, and the vertical tilting moment that acts on the slide table 12 due to the grinding reaction force is reduced.
The followability of the slide table to control is further improved.

【0006】[0006]

【実施例】図示の実施例は、ワークたるエンジン用動弁
カムWを研削するNC研削盤に本発明を適用したもので
ある。NC研削盤は、図1に示す如く、機台1上に設け
た、前側のワーク支持ユニット2と後側の砥石支持ユニ
ット3とを備えている。ワーク支持ユニット2は、モー
タ等の駆動源4aによりボールねじ機構4bを介して左
右動されるスライドテーブル4上に左右方向に間隔を存
してワークスピンドルヘッド5とテールストック6とを
搭載して成るもので、動弁カムWをワークスピンドルヘ
ッド5とテールストック6との間にセットして、その一
端をワークスピンドルヘッド5に備えるスピンドルの先
端のチャック5aでチャッキングし、スピンドルモータ
5bにより動弁カムWを回転させつつそのカム駒Waを
研削する。図中7は、スライドテーブル4上に設けた、
動弁カムWのジャーナル部を支持するワークレストであ
る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, the present invention is applied to an NC grinder that grinds a valve operating cam W for an engine, which is a work. As shown in FIG. 1, the NC grinder includes a work support unit 2 on the front side and a grindstone support unit 3 on the rear side, which are provided on the machine base 1. The work supporting unit 2 has a work spindle head 5 and a tail stock 6 mounted on a slide table 4 which is horizontally moved by a drive source 4a such as a motor via a ball screw mechanism 4b with a space left and right. The valve cam W is set between the work spindle head 5 and the tail stock 6, one end of which is chucked by the chuck 5a at the tip of the spindle provided in the work spindle head 5, and is driven by the spindle motor 5b. While rotating the valve cam W, the cam piece Wa is ground. In the figure, 7 is provided on the slide table 4,
It is a work rest that supports the journal portion of the valve operating cam W.

【0007】砥石支持ユニット3は、図2、図3に明示
する如く、機台1に固定されるベース8と、ベース8上
の左右1対のガイドレール9,9に沿ってモータ等の駆
動源10によりボールねじ機構11を介して前後動され
るスライドテーブル12と、スライドテーブル12上に
搭載したスピンドルモータ13と、該テーブル12の前
端に取付けた、スピンドルモータ13によりベルト14
を介して駆動されるスピンドルを有する砥石スピンドル
ヘッド15とで構成されている。
As shown in FIGS. 2 and 3, the grindstone support unit 3 drives a motor or the like along a base 8 fixed to the machine base 1 and a pair of left and right guide rails 9 on the base 8. A slide table 12 that is moved back and forth by a source 10 via a ball screw mechanism 11, a spindle motor 13 mounted on the slide table 12, and a belt 14 by a spindle motor 13 attached to the front end of the table 12.
And a grindstone spindle head 15 having a spindle driven via.

【0008】スライドテーブル12は、両ガイドレール
9,9にその上面から横方向内側面に亘って摺動自在に
係合する上部スライダ12aと、両ガイドレール9,9
の下面に摺動自在に係合する下部スライダ12bとによ
って、両ガイドレール9,9に左右上下のガタを防止し
た状態で前後動自在に支持されている。そして、上部ス
ライダ12a内にボールを内蔵するナット11aを固定
すると共に、該ナット11aに駆動源10に連結される
螺杆11bを螺挿してボールねじ機構11を構成し、動
弁カムWの回転に同期して駆動源10をNC制御するこ
とによりスライドテーブル12を進退させ、カム駒Wa
を所要のプロフィールに研削する。
The slide table 12 includes an upper slider 12a slidably engaged with the guide rails 9 and 9 from the upper surface to the inner side surface in the lateral direction, and the guide rails 9 and 9.
By the lower slider 12b slidably engaged with the lower surface of the above, the guide rails 9 and 9 are supported by the guide rails 9 and 9 so as to be able to move back and forth while preventing back and forth play. Then, a nut 11a containing a ball is fixed in the upper slider 12a, and a screw rod 11b connected to the drive source 10 is screwed into the nut 11a to form a ball screw mechanism 11 for rotating the valve operating cam W. The slide table 12 is moved back and forth by NC control of the drive source 10 in synchronism with the cam piece Wa.
To the required profile.

【0009】砥石スピンドルヘッド15は、図4に示す
如く、ハウジング16と、ハウジング16に軸支したス
ピンドル17とを備えている。そして、砥石スピンドル
ヘッド15を、スピンドル17に連結する砥石18の軸
方向中心位置が平面視でボールねじ機構11の軸線11
cに合致するように、ハウジング16においてスライド
テーブル12の前端部にボルト19止めした。これによ
れば、研削反力の作用線がボールねじ機構11の軸線1
1cに対し横方向にオフセットせず、研削反力をボール
ねじ機構11によりスライドテーブル12に横方向の傾
動モーメントを作用させずに受けられるようになり、N
C制御に対するスライドテーブル12の追従性を向上さ
せることができる。
As shown in FIG. 4, the grindstone spindle head 15 comprises a housing 16 and a spindle 17 pivotally supported by the housing 16. The axial center position of the grindstone 18 connecting the grindstone spindle head 15 to the spindle 17 is the axis 11 of the ball screw mechanism 11 in plan view.
A bolt 19 was fastened to the front end of the slide table 12 in the housing 16 so as to match c. According to this, the line of action of the grinding reaction force is the axis line 1 of the ball screw mechanism 11.
1c is not laterally offset, and the grinding reaction force can be received by the ball screw mechanism 11 without applying a lateral tilting moment to the slide table 12.
The followability of the slide table 12 with respect to the C control can be improved.

【0010】ハウジング16には、後方に張り出す取付
ベース16aが一体成形されており、スライドテーブル
12の前端部の横方向一側部に形成した取付面12cに
取付ベース16aを着座させてボルト19止めするが、
本実施例では取付面12cを前下りに傾斜させて、砥石
スピンドルヘッド15を、砥石18の高さを可及的に引
下げた状態でスライドテーブル12に取付けられるよう
にした。これによれば、研削反力の作用線とボールねじ
機構11の軸線11cとの間の上下方向の距離が短縮さ
れ、研削反力によってスライドテーブル12に作用する
上下方向の傾動モーメントが軽減されて、NC制御に対
するスライドテーブル12の追従性が一層向上する。
尚、ハウジング16には、取付面12cの前端のアンダ
ーカット部12dに係合してボルト19止めされる顎部
16bが形成されており、砥石スピンドルヘッド15の
浮上りを確実に防止できるようにした。図中20は、砥
石スピンドルヘッド15のハウジング16に取付けた砥
石カバーである。
The housing 16 is integrally formed with a mounting base 16a projecting rearward, and the mounting base 16a is seated on a mounting surface 12c formed at one lateral side of the front end of the slide table 12 to attach the bolt 19 to the mounting surface 16c. Stop,
In this embodiment, the mounting surface 12c is inclined forward and downward so that the grindstone spindle head 15 can be mounted on the slide table 12 in a state where the height of the grindstone 18 is lowered as much as possible. According to this, the vertical distance between the line of action of the grinding reaction force and the axis 11c of the ball screw mechanism 11 is shortened, and the vertical tilting moment acting on the slide table 12 by the grinding reaction force is reduced. , NC control of the slide table 12 is further improved.
The housing 16 is provided with a jaw portion 16b which is engaged with the undercut portion 12d at the front end of the mounting surface 12c and fixed with the bolt 19 so that the whetstone spindle head 15 can be reliably prevented from rising. did. Reference numeral 20 in the drawing denotes a grindstone cover attached to the housing 16 of the grindstone spindle head 15.

【0011】ところで、本実施例のように砥石18をス
ライドテーブル12の横幅内に配置する場合、砥石径が
大きくなると、スライドテーブル12の前端部の砥石1
8に合致する部分を干渉防止のために大きく切欠くこと
が必要となり、その結果、スライドテーブル12の前端
部に取付ける砥石スピンドルヘッド15の支持剛性が低
下して、加工精度を向上させることが困難になる。
By the way, when the grindstone 18 is arranged within the lateral width of the slide table 12 as in the present embodiment, when the grindstone diameter becomes large, the grindstone 1 at the front end portion of the slide table 12 becomes large.
It is necessary to make a large notch in the portion corresponding to 8 to prevent interference, and as a result, the supporting rigidity of the grindstone spindle head 15 attached to the front end portion of the slide table 12 is reduced, making it difficult to improve machining accuracy. become.

【0012】また、カム駒Waのベース円部の研削から
カムトップ部の研削への移行に際し砥石18を後退させ
る必要があるが、図5(a)に示す大径の砥石18を用
いた場合の後退量Laに比し、図5(b)に示す小径の
砥石18を用いた場合の後退量Lbの方が小さくなる。
そして、動弁カムWの回転加速度を一定とした場合にお
けるベース円部からカムトップ部への移行時における砥
石18の後退加速度は、大径砥石では図5(c)のa
線、小径砥石では同図b線のようになり、小径砥石を用
いる場合は大径砥石のような急加速での後退が不要にな
る。そのため、砥石径を小さくする程動弁カムWの回転
速度を上げることができ、加工時間を短縮できる。
Further, when the grinding of the base circular portion of the cam piece Wa is changed to the grinding of the cam top portion, it is necessary to retract the grindstone 18, but when the large-diameter grindstone 18 shown in FIG. 5A is used. 5B, the retreat amount Lb is smaller when the small-diameter grindstone 18 shown in FIG. 5B is used.
Then, when the rotational acceleration of the valve operating cam W is constant, the backward acceleration of the grindstone 18 at the time of shifting from the base circle portion to the cam top portion is a in FIG.
Lines and small-diameter grindstones are as shown by line b in the figure, and when a small-diameter grindstone is used, it is not necessary to retreat due to sudden acceleration unlike large-diameter grindstones. Therefore, the smaller the diameter of the grindstone, the higher the rotational speed of the valve operating cam W, and the shorter the processing time.

【0013】更に、小径砥石を用いると、図6に示すよ
うな内方に窪んだ凹形のプロフィールを持つカム駒Wa
も研削できるようになり、動弁カムWのカムプロフィー
ルの設計の自由度が増す。
Further, when a small-diameter grindstone is used, a cam piece Wa having an inwardly concave concave profile as shown in FIG.
Also, the degree of freedom in designing the cam profile of the valve operating cam W is increased.

【0014】以上のように、砥石径を小さくすると種々
の利点があるが、動弁カムWを研削するには、砥石スピ
ンドルヘッド15のハウジング16が動弁カムWに干渉
しないように、ハウジング径を砥石径以下にする必要が
ある。そして、ハウジング16を小径化するとこれに軸
支するスピンドル17も小径化せざるを得ず、ハウジン
グ16から突出するスピンドル17の部分に片持ち状態
で砥石18を取付けたのでは、砥石18の支持剛性を確
保できなくなる。
As described above, reducing the diameter of the grindstone has various advantages. However, in order to grind the valve cam W, the diameter of the housing 16 of the grindstone spindle head 15 should be adjusted so as not to interfere with the valve cam W. Must be less than the diameter of the grindstone. When the diameter of the housing 16 is reduced, the diameter of the spindle 17 that supports it must be reduced. If the grindstone 18 is attached to the portion of the spindle 17 protruding from the housing 16 in a cantilever state, the grindstone 18 cannot be supported. The rigidity cannot be secured.

【0015】そこで、本実施例では、ハウジング16の
砥石18側の端部にスピンドル17を遊挿する筒状のサ
ポート部21を設け、該サポート部21の外周に軸方向
に間隔を存して1対の軸受22,22を並設し、該両軸
受22,22を介してサポート部21に筒状の砥石ホル
ダ23を軸支し、該ホルダ23に砥石18を外嵌固定し
た。砥石ホルダ23は、サポート部21から突出するス
ピンドル17の先端に該ホルダ23の先端にボルト止め
したフランジ25を介して連結され、スピンドル17と
一体に回転する。尚、フランジ25はねじ式クランプ部
材25aを介してスピンドル17に締付固定される。
Therefore, in this embodiment, a cylindrical support portion 21 into which the spindle 17 is loosely inserted is provided at the end of the housing 16 on the side of the grindstone 18, and there is an axial interval on the outer periphery of the support portion 21. A pair of bearings 22, 22 were arranged side by side, a cylindrical grindstone holder 23 was pivotally supported by the support portion 21 via the bearings 22, 22, and the grindstone 18 was externally fitted and fixed to the holder 23. The grindstone holder 23 is connected to the tip of the spindle 17 protruding from the support portion 21 via a flange 25 bolted to the tip of the holder 23 and rotates integrally with the spindle 17. The flange 25 is fastened and fixed to the spindle 17 via a screw type clamp member 25a.

【0016】スピンドル17は、ベルト14の巻掛け部
の両端部において、ハウジング16に軸方向に離間して
設けた第1と第2の1対の筒部16c,16dに夫々軸
受26を介して軸支されている。尚、本実施例では第1
筒部16cにインナースリーブ16eを内嵌固定し、該
スリーブ16eに前記サポート部21を一体成形してい
る。
The spindle 17 is provided with a pair of first and second cylindrical portions 16c and 16d, which are axially separated from each other, on the housing 16 at both ends of the winding portion of the belt 14 via bearings 26, respectively. It is pivotally supported. In this embodiment, the first
An inner sleeve 16e is fitted and fixed to the cylindrical portion 16c, and the support portion 21 is integrally formed with the sleeve 16e.

【0017】前記両軸受22,22間にはスペーサ27
が介設されており、インナースリーブ16eの内周に螺
挿したアジャスタ28により皿ばね29とプッシュロッ
ド30とを介して両軸受22,22を軸方向に予圧し、
砥石ホルダ23をラジアル方向及びスラスト方向にガタ
無く軸支し得るようにした。
A spacer 27 is provided between the bearings 22 and 22.
Is interposed, and both bearings 22, 22 are pre-loaded in the axial direction via a disc spring 29 and a push rod 30 by an adjuster 28 screwed into the inner circumference of the inner sleeve 16e,
The grindstone holder 23 can be pivotally supported in the radial direction and the thrust direction without play.

【0018】以上の構成によれば、ハウジング16を小
径化することでスピンドル17が小径化されても、砥石
18は砥石ホルダ23と両軸受22,22とを介してサ
ポート部21に軸支されるため、砥石18の支持剛性を
確保できる。その結果、小径の砥石18を用いることが
でき、また、ハウジング16及びスピンドル17の小径
化により砥石スピンドルヘッド15を軽量化でき、スラ
イドテーブル12の負荷が軽減されて、NC制御に対す
るスライドテーブル12の追従性が向上し、加工精度が
向上する。
According to the above construction, even if the spindle 17 is reduced in diameter by reducing the diameter of the housing 16, the grindstone 18 is axially supported by the support portion 21 via the grindstone holder 23 and the bearings 22 and 22. Therefore, the supporting rigidity of the grindstone 18 can be secured. As a result, a grindstone 18 having a small diameter can be used, and the grindstone spindle head 15 can be made lighter by reducing the diameters of the housing 16 and the spindle 17, and the load on the slide table 12 can be reduced, so that the slide table 12 for NC control can be reduced. Followability is improved and processing accuracy is improved.

【0019】ところで、両軸受22,22の支持部位の
ばね定数が互に等しい場合、研削反力による砥石18の
ラジアル方向の変位量は、両軸受22,22間のスパン
の中心に砥石18の軸方向中心位置を合致させたときが
最も小さくなるが、一方の軸受22の支持部位のばね定
数が他方の軸受22の支持部位のばね定数より大きな場
合には、砥石18の軸方向中心位置を両軸受22,22
間のスパン中心よりも一方の軸受22側にオフセットさ
せた方が変位量が小さくなる。本実施例ではサポート部
21が片持ち梁となるため、ハウジング16寄りの軸受
22の支持部位のばね定数の方が先端側の軸受22の支
持部位のばね定数より大きくなり、そこで、砥石18の
軸方向中心位置を両軸受22,22間のスパン中心より
もハウジング16側にオフセットさせた状態で砥石ホル
ダ23に砥石18を外嵌固定し、研削反力による砥石1
8の変位を最小限に抑制して、加工精度を一層向上し得
るようにした。
By the way, when the spring constants of the support parts of both bearings 22 and 22 are equal to each other, the radial displacement of the grindstone 18 due to the grinding reaction force is such that the grindstone 18 is located at the center of the span between both bearings 22 and 22. It becomes the smallest when the axial center positions are matched, but when the spring constant of the support portion of one bearing 22 is larger than the spring constant of the support portion of the other bearing 22, the axial center position of the grindstone 18 is Both bearings 22, 22
The amount of displacement is smaller when the bearing 22 is offset toward the one bearing 22 side than the center of the span. In the present embodiment, since the support portion 21 is a cantilever, the spring constant of the supporting portion of the bearing 22 near the housing 16 is larger than the spring constant of the supporting portion of the bearing 22 on the tip side, so that the whetstone 18 The grindstone 18 is externally fitted and fixed to the grindstone holder 23 in a state where the axial center position is offset to the housing 16 side with respect to the span center between both bearings 22 and 22, and the grindstone 1 by the grinding reaction force 1
The displacement of No. 8 was suppressed to the minimum, and the processing accuracy could be further improved.

【0020】尚、各軸受22,26には、夫々給気通路
31を介して潤滑用のオイルエアが供給される。図中3
2はエアの排気通路、33は各軸受22,26を外気に
対しシールする、ラビリンス構造のシールリングであ
る。
The bearings 22 and 26 are supplied with lubricating oil air through the air supply passages 31, respectively. 3 in the figure
Reference numeral 2 is an air exhaust passage, and 33 is a seal ring having a labyrinth structure for sealing the bearings 22 and 26 against the outside air.

【0021】[0021]

【発明の効果】以上の説明から明らかなように、本発明
によれば、研削反力によってスライドテーブルに作用す
る傾動モーメントを軽減することができ、NC制御に対
するスライドテーブルの追従性を向上させて、ワークを
高精度で研削加工できる。
As is apparent from the above description, according to the present invention, the tilting moment acting on the slide table due to the grinding reaction force can be reduced, and the followability of the slide table to the NC control can be improved. The work can be ground with high precision.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明に係わる砥石スピンドルヘッドを具備
する研削盤の一例の平面図
FIG. 1 is a plan view of an example of a grinder including a grindstone spindle head according to the present invention.

【図2】 研削盤の砥石支持ユニットの部分截断側面図[Fig. 2] Side view of a partial cutting of a grindstone support unit of a grinder

【図3】 図2のIII−III線截断正面図FIG. 3 is a front view taken along the line III-III of FIG.

【図4】 砥石スピンドルヘッドの截断正面図FIG. 4 is a cutaway front view of the grindstone spindle head.

【図5】 (a)(b)(c)砥石の移動量と加速度と
を示す図
5 (a), (b) and (c) are diagrams showing the movement amount and acceleration of the grindstone.

【図6】 カムプロフィールを示す図FIG. 6 is a diagram showing a cam profile.

【符号の説明】[Explanation of symbols]

2 ワーク支持ユニット 3 砥石支持ユニ
ット 10 駆動源 11 ボールねじ
機構 12 スライドテーブル 12c 取付面 15 砥石スピンドルヘッド 16 ハウジング 16a 取付ベース 18 砥石
2 Work Support Unit 3 Grindstone Support Unit 10 Drive Source 11 Ball Screw Mechanism 12 Slide Table 12c Mounting Surface 15 Grindstone Spindle Head 16 Housing 16a Mounting Base 18 Grindstone

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 ワークを支持するワーク支持ユニット
と、ワーク支持ユニットに向けて進退されるスライドテ
ーブル上に、円板状の砥石を取付けた砥石スピンドルヘ
ッドを砥石の軸方向がスライドテーブルの進退方向に直
交する方向を向くように搭載して成る砥石支持ユニット
とを備え、スライドテーブルを駆動源によりボールねじ
機構を介してNC制御で進退させてワークを研削する研
削盤において、スライドテーブルのワーク支持ユニット
側の端部に、砥石の軸方向中心位置が平面視でボールね
じ機構の軸線に略合致するような位置関係で砥石スピン
ドルヘッドを取付けることを特徴とする研削盤。
1. A grindstone spindle head having a disk-shaped grindstone mounted on a work support unit that supports a work and a slide table that moves back and forth toward the work support unit. And a grindstone support unit mounted so as to be oriented in a direction orthogonal to, and a work machine for supporting a slide table in a grinder that grinds a work by advancing and retracting the slide table by NC control via a ball screw mechanism by a drive source. A grinding machine characterized in that a grindstone spindle head is attached to an end portion on the unit side in such a positional relationship that the axial center position of the grindstone substantially matches the axis of the ball screw mechanism in a plan view.
【請求項2】 砥石スピンドルヘッドのハウジングにワ
ーク支持ユニットとは反対方向に張り出す取付ベースを
設け、スライドテーブルの前記端部の上面にワーク支持
ユニットに向けて前下りに傾斜する取付面を形成し、該
取付面に取付ベースを着座させて固定することを特徴と
する請求項1に記載の研削盤。
2. A grindstone spindle head housing is provided with a mounting base projecting in a direction opposite to the work supporting unit, and a mounting surface is formed on the upper surface of the end of the slide table so as to be inclined forward and downward toward the work supporting unit. The grinding machine according to claim 1, wherein a mounting base is seated on and fixed to the mounting surface.
JP16622995A 1995-06-30 1995-06-30 Grinder Expired - Fee Related JP3306485B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16622995A JP3306485B2 (en) 1995-06-30 1995-06-30 Grinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16622995A JP3306485B2 (en) 1995-06-30 1995-06-30 Grinder

Publications (2)

Publication Number Publication Date
JPH0911108A true JPH0911108A (en) 1997-01-14
JP3306485B2 JP3306485B2 (en) 2002-07-24

Family

ID=15827512

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16622995A Expired - Fee Related JP3306485B2 (en) 1995-06-30 1995-06-30 Grinder

Country Status (1)

Country Link
JP (1) JP3306485B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2070646A2 (en) 2007-12-10 2009-06-17 Jtekt Corporation Tool spindle device
WO2012077583A1 (en) 2010-12-07 2012-06-14 Daikin Industries, Ltd. Curable composition, molded product and method for producing molded product
CN104741997A (en) * 2015-04-07 2015-07-01 台州瑞进机械有限公司 Grinding machine and machining method for machining shifting baffle block bottom working surface
CN111515691A (en) * 2020-04-22 2020-08-11 安徽省繁昌县皖南阀门铸造有限公司 Sprue gate cleaning device for valve body casting

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2070646A2 (en) 2007-12-10 2009-06-17 Jtekt Corporation Tool spindle device
US8133098B2 (en) 2007-12-10 2012-03-13 Jtekt Corporation Tool spindle device
WO2012077583A1 (en) 2010-12-07 2012-06-14 Daikin Industries, Ltd. Curable composition, molded product and method for producing molded product
CN104741997A (en) * 2015-04-07 2015-07-01 台州瑞进机械有限公司 Grinding machine and machining method for machining shifting baffle block bottom working surface
CN111515691A (en) * 2020-04-22 2020-08-11 安徽省繁昌县皖南阀门铸造有限公司 Sprue gate cleaning device for valve body casting

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