JP2948251B2 - Cutting method for brittle materials - Google Patents

Cutting method for brittle materials

Info

Publication number
JP2948251B2
JP2948251B2 JP1618490A JP1618490A JP2948251B2 JP 2948251 B2 JP2948251 B2 JP 2948251B2 JP 1618490 A JP1618490 A JP 1618490A JP 1618490 A JP1618490 A JP 1618490A JP 2948251 B2 JP2948251 B2 JP 2948251B2
Authority
JP
Japan
Prior art keywords
grinding wheel
cutting
cut
axis
pressing force
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 - Fee Related
Application number
JP1618490A
Other languages
Japanese (ja)
Other versions
JPH03221408A (en
Inventor
正之 湯浅
泰造 下村
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.)
Shimomura Seisakusho KK
Original Assignee
Shimomura Seisakusho KK
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 Shimomura Seisakusho KK filed Critical Shimomura Seisakusho KK
Priority to JP1618490A priority Critical patent/JP2948251B2/en
Publication of JPH03221408A publication Critical patent/JPH03221408A/en
Application granted granted Critical
Publication of JP2948251B2 publication Critical patent/JP2948251B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)

Description

【発明の詳細な説明】 (産業上の利用分野) この発明は、硬脆特性を示す材料、例えば、セラミッ
クスなどからなる棒状の被切断物を効率良く切断する方
法に関するものである。
Description: TECHNICAL FIELD The present invention relates to a method for efficiently cutting a rod-shaped object made of a material exhibiting hard and brittle characteristics, for example, ceramics.

(従来の技術) 現在、塑性変形抵抗が大きく、高硬度なセラミックス
は、その優れた種々の特性を生かして多くの分野で使用
されつつある。
(Prior Art) At present, ceramics having high plastic deformation resistance and high hardness are being used in many fields by taking advantage of their excellent various characteristics.

その場合に、セラミックスを用途に合わせて所定の形
状寸法に機械加工することは不可避であり、セラミック
スを所定寸法に切断する場合には、それが高硬度である
ことから、切断工具としての砥石車を確実に被切断物に
喰い込ませるため、切断装置、具体的には、砥石車の保
持機構の剛性を高め、一定の切込み量で砥石車を切り込
む、いわゆる位置制御方法が、従来から用いられてき
た。
In such a case, it is inevitable to machine the ceramic into a predetermined shape and size according to the application, and when cutting the ceramic to a predetermined size, it is a high-hardness wheel. In order to ensure that the grinding wheel bites into the object to be cut, a so-called position control method, which increases the rigidity of a cutting device, specifically, the holding mechanism of the grinding wheel, and cuts the grinding wheel at a constant cutting amount, has conventionally been used. Have been.

(発明が解決しようとする課題) しかしながら、出発材料を極めて高い温度で焼成して
製造されるセラミックスは、その製造に際して温度の影
響を受け易いことから、組織の偏りが大きく、また、砥
石車の円弧部分と被切断物との相対的な接触領域が、砥
石車の切り込み量に応じて増大すると、砥石車に作用す
る反力が増加する。このため、切断効率を向上させるべ
く、砥石車の切り込み量を大きく設定した場合には、砥
石車に作用する反力がその許容値を越えることとなり、
当該反力が砥石車の許容値を越えた状態が一定時間継続
すると、砥石車及び/又は被切断物が破損されることと
なる。
(Problems to be Solved by the Invention) However, ceramics produced by firing a starting material at an extremely high temperature are susceptible to temperature during the production, so that the structure is largely biased, and the grinding wheel When the relative contact area between the arc portion and the workpiece increases in accordance with the cutting amount of the grinding wheel, the reaction force acting on the grinding wheel increases. For this reason, when the cutting amount of the grinding wheel is set to be large in order to improve the cutting efficiency, the reaction force acting on the grinding wheel exceeds the allowable value,
If the reaction force exceeds the allowable value of the grinding wheel for a certain period of time, the grinding wheel and / or the object to be cut will be damaged.

このため、従来の方法にあっては、切断に際して、砥
石車に作用する反力を小さなものとし、また、被切断物
の損傷を防止するため、切り込み量を小さくして切断す
るのが常であり、これがため、切断効率が低いと言う問
題があった。
For this reason, in the conventional method, when cutting, the reaction force acting on the grinding wheel is made small, and in order to prevent damage to the object to be cut, it is usual to cut with a small cutting amount. Therefore, there is a problem that the cutting efficiency is low.

本発明は、このような問題に鑑みてなされたものであ
り、セラミックス等の硬脆性材料を、損傷することなく
効率良く切断し得る切断方法を提供することを目的とす
る。
The present invention has been made in view of such a problem, and an object of the present invention is to provide a cutting method capable of cutting a hard brittle material such as ceramics efficiently without being damaged.

(課題を達成するための手段) この目的を達成するため、本発明にあっては、例え
ば、セラミックス等の硬脆特性を示す被切断物を、砥石
車を用いて切断するに際し、準備位置にある回転させた
砥石車を被切断物に当接する初期位置にもたらす工程
と、砥石車の被切断物に対する押圧力を、一定時間間隔
でその最小値と最大値との間で変動させると共に、砥石
車の軸線と被切断物の軸線との間の相対距離を検知する
工程と、砥石車に作用する反力を前記時間間隔より短い
時間間隔で検知し、反力が砥石車の許容値を越えたとき
に砥石車の押圧力を最小とし、被切断物をその軸線周り
に一定量回転させる工程と、砥石車の軸線と被切断物の
軸線との相対距離に基づいて砥石車を準備位置に復帰さ
せる工程とを具えてなる。
(Means for Achieving the Object) In order to achieve this object, in the present invention, for example, when cutting an object having hard and brittle characteristics such as ceramics using a grinding wheel, the cutting position is set to a preparation position. Bringing a rotated grinding wheel to an initial position in contact with the workpiece, and changing the pressing force of the grinding wheel on the workpiece between its minimum value and maximum value at regular time intervals, and Detecting the relative distance between the axis of the wheel and the axis of the object to be cut, and detecting the reaction force acting on the grinding wheel at a time interval shorter than the time interval, the reaction force exceeding the allowable value of the grinding wheel; When the pressing force of the grinding wheel is minimized, the workpiece is rotated by a fixed amount around its axis, and the grinding wheel is moved to the preparation position based on the relative distance between the axis of the grinding wheel and the axis of the workpiece. And a step of restoring.

(作 用) 回転する砥石車と被切断物とが接触した状態、つまり
砥石車の押圧力が最小である状態から、砥石車の押圧力
を一定時間間隔で、砥石車の許容し得る最大押圧力との
間で変動させると、被切断物を砥石車のの許容最大押圧
力で切断することとなり、実質的に各時間間隔における
砥石車の押圧力を大きな値に設定したことと等価となる
ので、効率よく切断することができる。
(Operation) From the state in which the rotating grinding wheel is in contact with the object to be cut, that is, the state in which the pressing force of the grinding wheel is minimum, the pressing force of the grinding wheel is increased at regular intervals to the maximum allowable pressing force of the grinding wheel. When the pressure fluctuates, the object to be cut is cut at the maximum allowable pressing force of the grinding wheel, which is substantially equivalent to setting the pressing force of the grinding wheel at each time interval to a large value. Therefore, cutting can be performed efficiently.

また、一定時間間隔で最小押圧力と許容最大押圧力と
の間で被切断物に押圧される砥石車に作用する反力を、
当該時間間隔より短い時間間隔で検知し、当該反力が許
容値を越えた場合には、砥石車の押圧力を最小、つま
り、砥石車と被切断物とが単に接触する状態として、被
切断物をその軸線周りに一定量回転させることにより、
砥石車と被切断物との間の相対的な接触領域を減少させ
た後、再び、砥石車を一定時間間隔でその最大押圧力と
最小押圧力との間で変動させることにより、砥石車に許
容値を越える反力が所定時間以上作用することがないの
で、砥石車が破損することもない。
Also, the reaction force acting on the grinding wheel pressed against the workpiece between the minimum pressing force and the allowable maximum pressing force at fixed time intervals,
When the reaction force exceeds the allowable value, the pressing force of the grinding wheel is minimized, that is, the grinding wheel and the workpiece are simply brought into contact with each other. By rotating an object around its axis by a certain amount,
After reducing the relative contact area between the grinding wheel and the workpiece, again by varying the grinding wheel between its maximum pressing force and minimum pressing force at regular time intervals, the grinding wheel Since a reaction force exceeding the allowable value does not act for a predetermined time or more, the grinding wheel is not damaged.

そして、砥石車の軸線と被切断物の軸線との相対距離
が所定値以下、つまり切断が完了したならば、砥石車を
準備位置に復帰させ、次の切断作業に備える。なお、砥
石車を一定時間間隔で最大及び最小押圧力との間で変動
させることとしたので、砥石車を充分冷却することがで
き、その寿命を向上させることができる。
Then, when the relative distance between the axis of the grinding wheel and the axis of the object to be cut is equal to or less than a predetermined value, that is, when the cutting is completed, the grinding wheel is returned to the preparation position to prepare for the next cutting operation. In addition, since the grinding wheel is changed between the maximum and the minimum pressing force at regular time intervals, the grinding wheel can be sufficiently cooled, and the life thereof can be improved.

(実施例) 以下、図面を参照しながら、本発明方法について詳述
する。
(Example) Hereinafter, the method of the present invention will be described in detail with reference to the drawings.

第1図は、酸化物系セラミックス、例えば、Al2O3、Z
rO2、非酸化物系セラミックス、例えば、SiC、B4C、W
C、Si3N4、TiB2等の硬脆性を示すセラミックスよりなる
被切断物10を、本発明方法を用いた切断装置を示す略線
図である。なお、第1図にあっては、砥石車12は、その
外周が被切断物としての、例えば、チタンダイボライト
(TiB2)からなるセラミックス棒10の外周面から離間し
た準備位置にある。
FIG. 1 shows an oxide ceramic, for example, Al 2 O 3 , Z
rO 2 , non-oxide ceramics such as SiC, B 4 C, W
FIG. 1 is a schematic diagram showing a cutting apparatus using a method of the present invention for cutting an object 10 made of hard and brittle ceramics such as C, Si 3 N 4 , and TiB 2 . In FIG. 1, the grinding wheel 12 is at a preparation position in which the outer periphery is separated from the outer peripheral surface of a ceramic rod 10 made of, for example, titanium diborite (TiB 2 ) as an object to be cut.

軸線周りに回転して、セラミックス棒10を切断する円
板形状をした砥石車12は、切断すべきセラミックス棒に
合わせてその周縁部にダイヤモンド砥粒を具備するもの
であり、一方、砥石車12を支持するヘッド部分14は、当
該砥石車12をセラミックス棒10に対して進退させ得るも
のであれば良く、本実施例では、加圧流体の適用に伴っ
て出力軸を進退させ得る流体圧シリンダ機構を具える。
A disk-shaped grinding wheel 12 that rotates around an axis and cuts the ceramic rod 10 is provided with diamond abrasive grains on the periphery thereof in accordance with the ceramic rod to be cut. The head portion 14 for supporting the grinding wheel 12 only needs to be able to advance and retreat the grinding wheel 12 with respect to the ceramic rod 10, and in this embodiment, a fluid pressure cylinder that can advance and retreat the output shaft with the application of the pressurized fluid. Provide a mechanism.

この流体圧シリンダ機構は、第2図に示したように、
シリンダチューブ16及びその内部に摺動自在に配設した
ピストン18により区画される隔室20a及び20bに、それぞ
れ所望圧力として加圧流体を適用することにより、その
出力軸22、ひいては砥石車12の進退量を変更することが
できるシリンダ24と、操作圧力源26としての、例えば、
エアーコンプレッサに接続された二組の対をなす弁を有
する圧力制御弁28とを具え、圧力制御弁のそれら対をな
す各弁の弁開度を、コントローラ30からの制御信号に応
じて調整することにより、それぞれの隔室に適用される
加圧流体の圧力差に応じて砥石車12の被切断物10に対す
る押圧力を適宜に変更することができる。なお、各隔室
に適用される各圧流体の圧力の大きさは、シリンダ24に
加圧流体を給排する管路32に設けた圧力検知手段34a及
び34bを介して求めることができる。
This fluid pressure cylinder mechanism, as shown in FIG.
By applying a pressurized fluid as a desired pressure to each of the compartments 20a and 20b defined by the cylinder tube 16 and the piston 18 slidably disposed therein, the output shaft 22 and thus the grinding wheel 12 A cylinder 24 that can change the amount of advance and retreat, and as an operating pressure source 26, for example,
A pressure control valve 28 having two pairs of valves connected to an air compressor, wherein the valve opening of each pair of the pressure control valves is adjusted according to a control signal from a controller 30. Thereby, the pressing force of the grinding wheel 12 on the workpiece 10 can be appropriately changed according to the pressure difference of the pressurized fluid applied to each compartment. The magnitude of the pressure of each pressurized fluid applied to each compartment can be determined via pressure detecting means 34a and 34b provided in a pipe 32 for supplying and discharging the pressurized fluid to and from the cylinder 24.

更に、ヘッド部分14にはラック36がシリンダ24の出力
軸に一体的に配設され、当該ラックに噛合するピニオン
を有する不動のロータリエンコーダ38からの出力信号に
基づいて、砥石車12のヘッド部分に対する相対運動量を
検知する。
Further, a rack 36 is provided on the head portion 14 integrally with the output shaft of the cylinder 24, and based on an output signal from an immovable rotary encoder 38 having a pinion that meshes with the rack, a head portion of the grinding wheel 12 is provided. The relative momentum with respect to is detected.

次に、このような切断装置を用いてセラミックス棒10
を切断する本発明方法について、第3図を参照しながら
説明する。
Next, using such a cutting device, the ceramic rod 10
The method according to the present invention for cutting off is described with reference to FIG.

第3図(a)に示したように、砥石ヘッドに取付けた
砥石車12をその軸線周りに(同図(a)にあっては矢印
Aで示す方向に)回転させ、コントローラ30からの制御
信号に伴う流体圧シリンダ機構の作動下で、砥石車12を
その準備位置から、その外周がセラミックス棒10の外周
面に当接する初期位置まで移動させる。
As shown in FIG. 3 (a), the grinding wheel 12 attached to the grinding wheel head is rotated around its axis (in the direction indicated by arrow A in FIG. 3 (a)), and the control from the controller 30 is performed. Under the operation of the fluid pressure cylinder mechanism according to the signal, the grinding wheel 12 is moved from the preparation position to an initial position where the outer periphery of the grinding wheel 12 contacts the outer peripheral surface of the ceramic rod 10.

それゆえ、砥石車12は、初期位置にあっては第3図
(b)に示したように、単にセラミックス棒10に接触す
る状態にあり、セラミックス棒からの反力が作用するこ
とがない。なお、砥石車12の準備位置から初期位置まで
の移動は、目視により確認しながら手動にて行い得るこ
とは勿論、砥石車12と被切断物10との当接に伴うロータ
リエンコーダ38からの出力信号変化、即ち、ロータリコ
ンコーダ38の出力信号が一定となることから検知するこ
ともできる。なお、その場合には、コントローラ30を用
いて判定することが有利である。
Therefore, when the grinding wheel 12 is in the initial position, as shown in FIG. 3 (b), it is simply in contact with the ceramic rod 10, and no reaction force from the ceramic rod acts. In addition, the movement of the grinding wheel 12 from the preparation position to the initial position can be performed manually while visually checking, and of course, the output from the rotary encoder 38 accompanying the contact between the grinding wheel 12 and the workpiece 10. It can also be detected from a signal change, that is, from the fact that the output signal of the rotary concoder 38 becomes constant. In this case, it is advantageous to make the determination using the controller 30.

そして、コントローラ30からの制御信号に基づいて圧
力制御弁28を駆動して、シリンダ24の各隔室に適用され
る加圧流体の圧力を、予め定められた時間間隔(t0)で
交互に変化されると、砥石車12は、被切断物としてのセ
ラミックス棒10に単に接触する最小押圧力と、砥石車12
を破壊することがなくセラミックス棒10に押圧し得る最
大押圧力との間でその押圧力を変化させながら、セラミ
ックス棒10の切断を開始する。その様子を同図(c)に
示す。なお、砥石車の押圧力の切換え時間間隔(t0)及
びその最小最大押圧力は、切断すべきセラミックス材料
に対する砥石車の破壊試験を行うことにより予め求める
ことができる。
Then, the pressure control valve 28 is driven based on a control signal from the controller 30, and the pressure of the pressurized fluid applied to each compartment of the cylinder 24 is alternately changed at a predetermined time interval (t 0 ). When changed, the grinding wheel 12 is moved to the minimum pressing force that simply comes into contact with the ceramic rod 10 as an object to be cut.
The cutting of the ceramic rod 10 is started while changing the pressing force between the maximum pressing force that can press the ceramic rod 10 without breaking the ceramic rod 10. The state is shown in FIG. The switching time interval (t 0 ) of the pressing force of the grinding wheel and its minimum and maximum pressing force can be obtained in advance by performing a breaking test of the grinding wheel on the ceramic material to be cut.

ところで、砥石車12のセラミックス棒10に対する実際
の押圧力(P)は、操作圧力源26からシリンダのそれぞ
れの隔室に適用される加圧流体の圧力差を、管路32に配
設した圧力検知手段34a及び34bを介して検知することに
より知ることができる。
By the way, the actual pressing force (P) of the grinding wheel 12 against the ceramic rod 10 is determined by the difference between the pressure of the pressurized fluid applied from the operating pressure source 26 to each compartment of the cylinder and the pressure applied to the pipe 32. It can be known by detecting through the detecting means 34a and 34b.

一方、セラミックス棒の切断に際して砥石車12に作用
する反力(R)は、砥石車12を含む砥石ヘッド部分の質
量(M)が既知であり、また、ロータリエンコーダ38の
出力信号から、砥石ヘッド部分の移動速度(v)、ひい
ては、当該ヘッド部分の加速度αが既知となるので、次
式に従って求めることができる。
On the other hand, as for the reaction force (R) acting on the grinding wheel 12 when the ceramic rod is cut, the mass (M) of the grinding wheel head including the grinding wheel 12 is known, and from the output signal of the rotary encoder 38, the grinding head Since the moving speed (v) of the portion, and thus the acceleration α of the head portion, is known, it can be obtained according to the following equation.

P−R=Mα …(1) ∫αdt=v …(2) そして、コントローラ30は、砥石車12に作用する反力
Rが、砥石車の許容値を越えるものであれば、圧力制御
弁28に制御信号を送り、砥石車12とセラミックス棒10と
が単に接触した相対位置関係、即ち初期状態となるよ
う、シリンダ24の各隔室に所定圧力として加圧流体を適
用する。それゆえ、砥石車12が破損する恐れのある大き
さの反力、つまり許容値を越えた張力が所定時間以上作
用することがないので、砥石車が破損することがない。
P−R = Mα (1) ∫αdt = v (2) Then, if the reaction force R acting on the grinding wheel 12 exceeds the allowable value of the grinding wheel, the controller 30 sets the pressure control valve 28 And pressurized fluid is applied to each compartment of the cylinder 24 as a predetermined pressure so that the grinding wheel 12 and the ceramic rod 10 simply come into contact with each other, that is, the initial state. Therefore, a reaction force of a magnitude that may damage the grinding wheel 12, that is, a tension exceeding an allowable value does not act for a predetermined time or more, so that the grinding wheel is not damaged.

また、砥石車12は、それがセラミックス棒10と単に当
接する初期位置にもたらされ、冷却水が砥石車及び切断
面に効率良く流入することから、切断時の発熱を小さく
抑制することができる。なお、砥石車の破損防止をより
有効なものとするため、砥石車12に作用する反力(R)
を検知する時間間隔(tp)を、砥石車12の押圧力(P)
の切換え時間(t0)より短くするものとし、本実施例に
あっては、t0が200msであるのに対し、tpを50msとし
た。
In addition, the grinding wheel 12 is brought to an initial position where the grinding wheel 12 is simply brought into contact with the ceramic rod 10, and the cooling water efficiently flows into the grinding wheel and the cut surface, so that heat generation during cutting can be suppressed to a small value. . In order to make the prevention of breakage of the grinding wheel more effective, the reaction force (R) acting on the grinding wheel 12
The time interval (t p ) for detecting the pressure is determined by the pressing force (P) of the grinding wheel 12.
Is shorter than the switching time (t 0 ), and in this embodiment, t p is set to 50 ms while t 0 is set to 200 ms.

砥石車12が、そこに作用する反力が許容値を越えたこ
とに対応して初期位置にもたらされたならば、第3図
(d)に示したように、既知の回転機構に支持されたセ
ラミックス棒10をその軸線周りに一定量回転させた後、
砥石車12を一定時間間隔を以てその最大及び最小押圧力
の間で変化させながら、セラミックス棒10の切断を続行
する。
If the grinding wheel 12 is brought to its initial position in response to the reaction force acting thereon exceeding the tolerance, it is supported by a known rotating mechanism, as shown in FIG. After rotating the ceramic bar 10 by a fixed amount around its axis,
The cutting of the ceramic rod 10 is continued while changing the grinding wheel 12 between its maximum and minimum pressing force at regular time intervals.

このように、砥石車12に作用する反力が許容値を越え
たならば、砥石車と被切断物との間の相対距離を離間さ
せて砥石車に作用する反力を低減させることにより、そ
の破損を大幅に低減することができる。
In this way, if the reaction force acting on the grinding wheel 12 exceeds an allowable value, by reducing the reaction force acting on the grinding wheel by increasing the relative distance between the grinding wheel and the workpiece, The damage can be greatly reduced.

そして、砥石車12の軸線とセラミックス棒10の軸線と
の相対距離が、所定の距離より小さくなったならば、砥
石車12が準備位置となるよう、コントローラ30は圧力制
御弁28に制御信号を送り、砥石車12に関連するシリンダ
24の隔室に適用される加圧流体の圧力を変更して、一つ
の切断作業を終了する。
Then, when the relative distance between the axis of the grinding wheel 12 and the axis of the ceramic rod 10 becomes smaller than a predetermined distance, the controller 30 sends a control signal to the pressure control valve 28 so that the grinding wheel 12 is in the ready position. Cylinder related to feed and grinding wheel 12
One cutting operation is completed by changing the pressure of the pressurized fluid applied to the 24 compartments.

なお、本実施例にあっては、棒状の被切断物を切断す
る場合について述べたが、被切断物が平板形状をしたも
のにあっても同様であり、砥石車を、その最小及び最大
押圧力の間で変化させながら平均に平行に移動させて切
断する場合であって、砥石車に作用する反力が一定時間
その許容値を越える場合にも適用することができること
は勿論、セラミックス以外の硬脆性材料にも適用し得
る。
In this embodiment, the case of cutting a bar-shaped object has been described. However, the same applies to a case where the object to be cut has a flat plate shape. It is also applicable to the case where cutting is performed by moving in parallel with the average while changing between pressures, and when the reaction force acting on the grinding wheel exceeds the allowable value for a certain period of time, of course, other than ceramics It can be applied to hard and brittle materials.

次に、本発明方法と従来方法とを比較するため、TiB2
よりなる試験片を複数本切断して、切断面粗さ、切断に
要する時間並びに砥石車及び被切断物の破損の割合を調
べた結果を次表に示す。なお、切断試験に供した試験片
の直径は25mmであり、ダイヤモンド砥粒を具える直径15
0mmの砥石車を3000r.p.mで回転させると共に、その最小
押圧力を5kgf、最大押圧力を10kgfとして200msの時間間
隔で切換え、砥石車に作用する反力の測定時間間隔を50
msとした。
Next, in order to compare the method of the present invention with the conventional method, TiB 2
The following table shows the results obtained by cutting a plurality of test pieces made of the same and examining the cut surface roughness, the time required for cutting, and the percentage of breakage of the grinding wheel and the object to be cut. The diameter of the test piece subjected to the cutting test was 25 mm, and the diameter of the test piece having diamond abrasive grains was 15 mm.
While rotating a 0 mm grinding wheel at 3000 rpm, the minimum pressing force is 5 kgf and the maximum pressing force is 10 kgf, switching is performed at a time interval of 200 ms, and the measurement time interval of the reaction force acting on the grinding wheel is 50
ms.

但し、切断面粗さは、精密粗さ計を用いて最大あらさ
を測定した。
However, the maximum roughness of the cut surface roughness was measured using a precision roughness meter.

上記表から明らかなように、本発明方法によれば、砥
石車及び被切断物が破損することがなく、切断時間を短
縮することができ、しかも、切断面粗さを小さなものと
なることが分かる。
As is clear from the above table, according to the method of the present invention, the grinding wheel and the object to be cut are not damaged, the cutting time can be reduced, and the cut surface roughness can be reduced. I understand.

(発明の効果) かくして、本発明方法によれば、砥石車及び被切断物
を損傷することなく、セラミックス等の硬脆性材料を効
率良く切断でき、しさも、切断面粗さを小さなものとす
ることができる。
(Effect of the Invention) Thus, according to the method of the present invention, hard and brittle materials such as ceramics can be efficiently cut without damaging the grinding wheel and the object to be cut, and the cut surface roughness is reduced. be able to.

【図面の簡単な説明】 第1図は、本発明方法を適用した切断装置を示す模式
図、 第2図は、第1図に示す装置に適用して好適な流体圧シ
リンダ機構を示す説明図、そして、 第3図(a)〜(d)は、本発明方法を用いて切断する
様子を示す図である。 10……被切断物、12……砥石車 14……ヘッド部分、24……シリンダ 26……操作圧力源、28……圧力制御弁 30……コントローラ、32……管路 36……ラック 38……ロータリエンコーダ
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a cutting apparatus to which the method of the present invention is applied, and FIG. 2 is an explanatory view showing a fluid pressure cylinder mechanism suitable for being applied to the apparatus shown in FIG. FIGS. 3 (a) to 3 (d) are views showing a state of cutting using the method of the present invention. 10: Workpiece, 12: Grinding wheel 14 ... Head part, 24 ... Cylinder 26 ... Operating pressure source, 28 ... Pressure control valve 30 ... Controller, 32 ... Pipe line 36 ... Rack 38 ……Rotary encoder

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】硬脆特性を示す被切断物を砥石車を用いて
切断するに際し、 準備位置にある回転させた砥石車を被切断物に当接する
初期位置にもたらす工程と、砥石車の被切断物に対する
押圧力を、一定時間間隔で、その最小値と最大値との間
で変動させると共に、砥石車の軸線と被切断物の軸線と
の間の相対距離を検知する工程と、砥石車に作用する反
力を前記時間間隔より短い時間間隔で検知し、反力が砥
石車の許容値を越えたときに砥石車の押圧力を最小と
し、被切断物をその軸線周りに一定量回転させる工程
と、砥石車の軸線と被切断物軸線との相当距離に基づい
て砥石車を準備位置に復帰させる工程とを具えてなるこ
とを特徴とする脆性材料の切断方法。
1. A step of bringing a rotated grinding wheel in a preparation position to an initial position in contact with the workpiece when cutting the workpiece having hard and brittle characteristics using a grinding wheel; A step of detecting the relative distance between the axis of the grinding wheel and the axis of the object to be cut, while changing the pressing force on the cut object at fixed time intervals between the minimum value and the maximum value thereof, Is detected at a time interval shorter than the above time interval, and when the reaction force exceeds the allowable value of the grinding wheel, the pressing force of the grinding wheel is minimized, and the object to be cut is rotated by a fixed amount around its axis. And a step of returning the grinding wheel to the preparation position based on a substantial distance between the axis of the grinding wheel and the axis of the workpiece.
JP1618490A 1990-01-29 1990-01-29 Cutting method for brittle materials Expired - Fee Related JP2948251B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1618490A JP2948251B2 (en) 1990-01-29 1990-01-29 Cutting method for brittle materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1618490A JP2948251B2 (en) 1990-01-29 1990-01-29 Cutting method for brittle materials

Publications (2)

Publication Number Publication Date
JPH03221408A JPH03221408A (en) 1991-09-30
JP2948251B2 true JP2948251B2 (en) 1999-09-13

Family

ID=11909429

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1618490A Expired - Fee Related JP2948251B2 (en) 1990-01-29 1990-01-29 Cutting method for brittle materials

Country Status (1)

Country Link
JP (1) JP2948251B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102267174A (en) * 2011-08-16 2011-12-07 高唐圣联鑫环保科技有限公司 Automatic honeycomb ceramic wet blank cutting and forming device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5909644B2 (en) * 2012-05-11 2016-04-27 パナソニックIpマネジメント株式会社 Pushing force adjusting device and power tool
CN108481532B (en) * 2018-03-13 2020-03-20 台州创兴环保科技有限公司 Environment-friendly processing robot

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102267174A (en) * 2011-08-16 2011-12-07 高唐圣联鑫环保科技有限公司 Automatic honeycomb ceramic wet blank cutting and forming device
CN102267174B (en) * 2011-08-16 2013-05-22 高唐圣联鑫环保科技有限公司 Automatic honeycomb ceramic wet blank cutting and forming device

Also Published As

Publication number Publication date
JPH03221408A (en) 1991-09-30

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