JPH05288670A - Friction testing apparatus for magnetic disk - Google Patents

Friction testing apparatus for magnetic disk

Info

Publication number
JPH05288670A
JPH05288670A JP12002892A JP12002892A JPH05288670A JP H05288670 A JPH05288670 A JP H05288670A JP 12002892 A JP12002892 A JP 12002892A JP 12002892 A JP12002892 A JP 12002892A JP H05288670 A JPH05288670 A JP H05288670A
Authority
JP
Japan
Prior art keywords
magnetic disk
magnetic
magnetic head
sensor block
spring member
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
Application number
JP12002892A
Other languages
Japanese (ja)
Inventor
Takashi Sugiyama
隆 杉山
Atsushi Aoyanagi
淳 青柳
Motomichi Itou
元通 伊藤
Hajime Shinohara
肇 篠原
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.)
Proterial Ltd
Original Assignee
Hitachi Metals 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 Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP12002892A priority Critical patent/JPH05288670A/en
Publication of JPH05288670A publication Critical patent/JPH05288670A/en
Pending legal-status Critical Current

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  • Supporting Of Heads In Record-Carrier Devices (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

PURPOSE:To measure frictional force accurately constituting a sensor block, to which a strain sensor is attached at a high resonant frequency and to measure the frictional forces of a plurality of magnetic disks and magnetic disks in a friction testing apparatus for the magnetic disks. CONSTITUTION:In a friction testing apparatus for magnetic disks, the upper surface of a sensor block 5 is attached to a supporting arm 4, the base part of a supporting spring member 6 is attached to the lower surface of the sensor block 5 and a magnetic head 7 is attached to a gimbal 6a at the tip of the supporting spring member 6. This apparatus is constituted so that the resonant frequency of the sensor block 5 is higher than that of the supporting spring member 6 by 100 Hz or more. The apparatus, which measures the friction forces of a plurality of magnetic disks, is formed of a plurality of rotation driving devices 11, a plurality of strain sensors 13, which detects the friction force acting on the magnetic head of each rotation driving device, a driving control device 16, which automatically controls the rotating state of each rotation driving device, and a recording device 14, which records the detected value of each sensor.

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、磁気ヘッドと磁気ディ
スクとの間の摩擦係数を測定する磁気ディスクの摩擦テ
スト装置に関し、特に摩擦力を正確に検出できるように
し、あるいは複数の磁気ディスクの摩擦力を自動的に測
定できるようにしたものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk friction test apparatus for measuring a coefficient of friction between a magnetic head and a magnetic disk, and more particularly, to enable accurate detection of frictional force or to detect a plurality of magnetic disks. The frictional force can be automatically measured.

【0002】[0002]

【従来の技術】従来より磁気ディスク上に情報を記録
し、若しくはこの磁気ディスク上に記録した情報を再生
出力するために磁気ディスク装置が使用されている。磁
気ディスク装置において情報の記録再生を行なうには、
磁気ヘッドと磁気ディスクとを例えば0.1〜0.2μ
mの微小間隔に保持するのが通常である。この場合、磁
気ヘッドと磁気ディスクとが接触や衝突をして摩擦や摩
耗が生じ、磁気ヘッドと磁気ディスクの両者にとって望
ましくないので、磁気ヘッドに浮上用スライダを使用し
ている。すなわち磁気ヘッドを装着したスライダが、高
速回転する磁気ディスクの表面との相対速度により両者
の間に発生する流体力学的浮上力を利用して、磁気ヘッ
ドを微小に浮上させている。
2. Description of the Related Art Conventionally, a magnetic disk device has been used for recording information on a magnetic disk or reproducing and outputting the information recorded on the magnetic disk. To record and reproduce information on a magnetic disk device,
The magnetic head and the magnetic disk are, for example, 0.1 to 0.2 μ.
It is usual to hold at a minute interval of m. In this case, since the magnetic head and the magnetic disk come into contact with each other or collide with each other to cause friction and wear, which is not desirable for both the magnetic head and the magnetic disk, a flying slider is used for the magnetic head. That is, a slider equipped with a magnetic head uses the hydrodynamic levitation force generated between the slider and the surface of a magnetic disk that rotates at a high speed to make the magnetic head float slightly.

【0003】しかしながら磁気ディスクが静止している
場合には、上記流体力学的浮上力が生じないため、スラ
イダは磁気ディスクの表面に接触した状態になってい
る。このため磁気ディスクの回転の初期および終期にお
いては、スライダは磁気ディスク表面と接触した状態で
相対移動をすることになり、CSS(Contact Start St
op) テストを繰返しても両者間の摩擦係数が小であるこ
とが磁気ディスクに要求される。従って磁気ディスクの
耐久性を評価するために、CSSサイクルテストや摩擦
係数の測定が行なわれている。
However, when the magnetic disk is stationary, the hydrodynamic levitation force does not occur, so that the slider is in contact with the surface of the magnetic disk. Therefore, at the beginning and the end of the rotation of the magnetic disk, the slider moves relative to the surface of the magnetic disk, and the CSS (Contact Start St
op) The magnetic disk is required to have a small friction coefficient between the two even after repeating the test. Therefore, in order to evaluate durability of the magnetic disk, CSS cycle test and measurement of friction coefficient are performed.

【0004】従来のCSSテスト装置では、磁気ディス
クの回転駆動装置を設けておき、回転駆動される磁気デ
ィスクから少し離れた位置の支持材に長いアームを取付
け、アームの先端に磁気ヘッドを取付けるとともに、ア
ームの先端部に歪センサを取付けている。そして磁気ヘ
ッドを磁気ディスク表面に接触させ、磁気ヘッドが回転
駆動される磁気ディスクとの接触で摩擦力を受けると、
歪センサが摩擦力に応じた検出信号を出すようになって
いる。また従来市販のCSSテスト装置では、ディスク
起動時の立ち上がり速度等の動作条件が異なるものが多
く、実際の動作状態とはかけ離れた条件でテストされて
いる。一方、実機のドライブにセンサーを設けて、磁気
ヘッドとディスク間の摩擦係数を測定することも行なわ
れている。
In a conventional CSS test device, a rotary drive device for a magnetic disk is provided, a long arm is attached to a support member at a position slightly away from the magnetic disk to be rotationally driven, and a magnetic head is attached to the tip of the arm. , A strain sensor is attached to the tip of the arm. Then, when the magnetic head is brought into contact with the surface of the magnetic disk and the magnetic head receives frictional force due to contact with the magnetic disk that is rotationally driven,
The strain sensor outputs a detection signal according to the frictional force. Further, in many commercially available CSS test devices, the operating conditions such as the rising speed at the time of starting the disk are often different, and the test is performed under the condition far from the actual operating state. On the other hand, it is also practiced to provide a sensor in a drive of an actual machine to measure the friction coefficient between the magnetic head and the disk.

【0005】[0005]

【発明が解決しようとする課題】上記従来のCSSテス
トでは、磁気ヘッドを取付けた長いアームの基端に歪セ
ンサーを取付けているので、その構造上、共振周波数が
低く、測定時にセンサーが共振してしまい、歪量の変動
が急激な場合には、十分な応答性が得られず、しかも測
定波形にセンサーの共振波形が重なっているために正確
な測定ができにくいという問題があった。
In the above-mentioned conventional CSS test, since the strain sensor is attached to the base end of the long arm to which the magnetic head is attached, the resonance frequency is low due to its structure, and the sensor resonates during measurement. If the strain amount fluctuates rapidly, sufficient responsiveness cannot be obtained, and moreover, there is a problem that it is difficult to perform accurate measurement because the resonance waveform of the sensor overlaps the measurement waveform.

【0006】また実機のドライブに歪センサーを取付け
てCSSテストをするものがあるが、その場合、1台の
実機ごとにテストをしなければならないので、測定効率
が悪く多くのテストを実施するには不適当であり、また
ディスク起動時の立ち上がり速度等の動作条件が異なる
ために測定誤差が生じやすかった。さらに磁気ディスク
のCSSテストに要する時間が長引くと、磁気ディスク
表面の摩擦係数の経時変化、再現性および信頼性が低い
という問題もある。そこで本発明は、歪センサーの支持
部を高い共振周波数に構成して摩擦力を正確に測定でき
るようにし、さらに複数の磁気ディスクと磁気ヘッドと
の摩擦力を同時に効率よく測定できるようにすることを
目的とする。
In addition, there is a system in which a strain sensor is attached to a drive of an actual machine to perform a CSS test. In that case, since the test must be performed for each one of the actual machines, the measurement efficiency is poor and many tests are performed. Is unsuitable, and measurement errors are likely to occur because operating conditions such as the rising speed at the time of starting the disk are different. Further, if the time required for the CSS test of the magnetic disk is prolonged, there is a problem that the friction coefficient of the surface of the magnetic disk changes with time, reproducibility and reliability are low. In view of this, the present invention provides a strain sensor having a high resonance frequency so that the frictional force can be accurately measured, and the frictional force between a plurality of magnetic disks and a magnetic head can be efficiently measured at the same time. With the goal.

【0007】[0007]

【課題を解決するための手段】本発明は、磁気ディスク
に磁気ヘッドを接触させ、磁気ヘッドに作用する摩擦力
を検出するようにした磁気ディスクの摩擦テスト装置に
おいて、上記目的を達成したものである。そのため、互
いに平行な上下方向の前板部と後板部の上下をそれぞれ
水平厚板部で連結した形状のセンサーブロックの上部
を、磁気ディスク近くに突出する支持アームに取付け、
センサーブロックの前板部と後板部とに歪ゲージをそれ
ぞれ2枚接着するとともに、合計4枚の歪ゲージでブリ
ッジ回路を構成した。またセンサーブロックの下部から
支持バネ部材を突出させ、支持バネ部材の先端のジンバ
ルに磁気ヘッドを取付け、センサーブロックの共振周波
数が支持バネ部材の共振周波数より100Hz以上高く
構成した。もう1つの本発明は、被測定用の複数の磁気
ディスクをそれぞれ回転させる複数の回転駆動装置と、
各回転駆動装置ごとに設けられて磁気ヘッドに作用する
摩擦力に応じた歪量の変位を検出する複数のセンサー
と、各回転駆動装置の回転状態を自動制御する駆動制御
装置と、各センサーの検出値を自動的に記録する記録装
置とを備え、複数の磁気ディスクと磁気ヘッドとの間の
摩擦力を自動的に測定できるようにした。
SUMMARY OF THE INVENTION The present invention achieves the above object in a magnetic disk friction test apparatus in which a magnetic head is brought into contact with a magnetic disk and the frictional force acting on the magnetic head is detected. is there. Therefore, the upper part of the sensor block in a shape in which the upper and lower front plate parts and the rear plate part in the vertical direction parallel to each other are respectively connected by the horizontal thick plate part is attached to the support arm protruding near the magnetic disk,
Two strain gauges were bonded to each of the front plate portion and the rear plate portion of the sensor block, and a total of four strain gauges constituted a bridge circuit. Further, the support spring member is projected from the lower part of the sensor block, the magnetic head is attached to the gimbal at the tip of the support spring member, and the resonance frequency of the sensor block is configured to be 100 Hz or more higher than the resonance frequency of the support spring member. According to another aspect of the present invention, a plurality of rotary drive devices for respectively rotating a plurality of magnetic disks to be measured,
A plurality of sensors that are provided for each rotary drive device to detect the displacement of the strain amount according to the frictional force acting on the magnetic head, a drive control device that automatically controls the rotation state of each rotary drive device, and A recording device for automatically recording the detected value is provided so that the frictional force between the plurality of magnetic disks and the magnetic head can be automatically measured.

【0008】[0008]

【作用】上記の磁気ディスクの摩擦テスト装置は、セン
サーブロックが、互いに平行な上下方向の前板部と後板
部の上下をそれぞれ水平厚板部で連結した形状に形成さ
れているので、前板部は4隅だけが支持された状態にな
り、前板部に取付けられた歪ゲージは磁気ヘッドから支
持バネ部材を介して伝達される作動力を確実に受ける。
また、センサーブロックは前記の形状に構成されている
ため共振周波数は大きくなり、センサーブロックに取付
けてある歪ゲージが共振するようなことはないので測定
値が正確であり、さらに作動力が急激に変動する場合で
も応答性よく測定できる。また、複数の回転駆動装置と
センサーと駆動制御装置と記録装置とを設けた磁気ディ
スクの摩擦テスト装置では、複数台の回転駆動装置を駆
動制御することにより測定効率が向上し、しかも任意の
回転駆動装置を自由にテスト開始、終了することもでき
る。
In the above-described magnetic disk friction test device, the sensor block is formed in a shape in which the upper and lower front plate portions and the rear plate portion, which are parallel to each other in the vertical direction, are connected by horizontal thick plate portions. Only the four corners of the plate portion are supported, and the strain gauge attached to the front plate portion reliably receives the actuating force transmitted from the magnetic head through the support spring member.
Also, since the sensor block is configured as described above, the resonance frequency becomes large, and the strain gauge attached to the sensor block does not resonate, so the measured value is accurate and the operating force is sharp. Even if it fluctuates, it can be measured with good responsiveness. Further, in a magnetic disk friction test device provided with a plurality of rotation drive devices, sensors, a drive control device, and a recording device, measurement efficiency is improved by controlling the drive of a plurality of rotation drive devices, and moreover, arbitrary rotation is achieved. It is also possible to freely start and end the test of the drive unit.

【0009】[0009]

【実施例】本発明の第1実施例を図1により説明する。
磁気ディスク1はその中心孔が回転軸2に挿入されて置
かれることにより、回転可能な状態に保持されるように
なっている。磁気ディスク1の外周位置に回転駆動装置
3が設けられ、回転駆動装置の伝達ローラ3aが磁気デ
ィスクの外周面に接触されると磁気ディスク1が回転さ
れ、離れた位置に戻されると回転を中止できるようにな
っている。磁気ディスク1の外周部上に支持アーム4が
突設され、その支持アーム4の先端にセンサーブロック
5の上面が取付けられ、センサーブロック5の下面に支
持バネ部材6の基端が取付けられる。また、支持バネ部
材6の先端のジンバル6aに磁気ヘッド7が取付けら
れ、磁気ヘッド7が磁気ディスク1に適度の接触圧で接
触されるようになっている。そして磁気ヘッド7が磁気
ディスク1に接触された状態で磁気ディスク1が回転さ
れると、磁気ヘッド7のスライダ7aと磁気ディスク1
との間に空気流が生じてスライダに浮上力が作用し、磁
気ヘッド7が磁気ディスク1に対して微小間隔離れた状
態に浮上されるようになっている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG.
The magnetic disk 1 is held in a rotatable state by inserting its center hole into the rotary shaft 2 and placing it. A rotation driving device 3 is provided at an outer peripheral position of the magnetic disk 1. When the transmission roller 3a of the rotation driving device contacts the outer peripheral surface of the magnetic disk, the magnetic disk 1 is rotated, and when it is returned to a distant position, the rotation is stopped. You can do it. A support arm 4 is projectingly provided on the outer peripheral portion of the magnetic disk 1, the upper surface of the sensor block 5 is attached to the tip of the support arm 4, and the base end of the support spring member 6 is attached to the lower surface of the sensor block 5. Further, the magnetic head 7 is attached to the gimbal 6a at the tip of the support spring member 6, and the magnetic head 7 is brought into contact with the magnetic disk 1 with an appropriate contact pressure. When the magnetic disk 1 is rotated while the magnetic head 7 is in contact with the magnetic disk 1, the slider 7 a of the magnetic head 7 and the magnetic disk 1 are rotated.
An air flow is generated between the magnetic head and the slider, and a levitation force acts on the slider, so that the magnetic head 7 is levitated in a state of being separated from the magnetic disk 1 by a minute distance.

【0010】センサーブロック5は、互いに平行な上下
方向の前板部5aと後板部5bの上下をそれぞれ水平厚
板部5cで連結した形状に構成され、前板部5a及び後
板部5bは4隅のみが水平厚板部5cに保持された状態
になっている。すなわちセンサーブロック5は、支持バ
ネ部材6の部分より共振周波数が約100Hzだけ高く
され、支持バネ部材6とセンサーブロック5が共振しな
い様になっている。前板部5aと後板部5bとに歪ゲー
ジ8がそれぞれ2枚接着され、合計4枚の歪ゲージ8で
ブリッジ回路が構成されている。また4枚の歪ゲージ8
は、磁気ヘッド7から支持バネ部材6を介して伝達され
る作動力に基づき変位されるようになっており、歪ゲー
ジ8で構成されるブリッジ回路の検出信号は図示を省略
したが歪量を摩擦力に変換する装置に入力されるように
なっている。
The sensor block 5 is formed in a shape in which a front plate portion 5a and a rear plate portion 5b which are parallel to each other in the vertical direction are connected by horizontal thick plate portions 5c, and the front plate portion 5a and the rear plate portion 5b are connected to each other. Only the four corners are held by the horizontal thick plate portion 5c. That is, the sensor block 5 has a resonance frequency higher than that of the support spring member 6 by about 100 Hz, so that the support spring member 6 and the sensor block 5 do not resonate. Two strain gauges 8 are bonded to each of the front plate portion 5a and the rear plate portion 5b, and a total of four strain gauges 8 form a bridge circuit. Also 4 strain gauges 8
Is displaced based on the actuating force transmitted from the magnetic head 7 via the support spring member 6, and the detection signal of the bridge circuit constituted by the strain gauge 8 is not shown in the figure, but the strain amount is It is designed to be input to a device that converts frictional force.

【0011】なお本実施例では、センサーブロック5を
アルミニウム製とし、その大きさは、高さが12mm、
上下厚板部5cの厚さは3mm、下面の縦横長さがそれ
ぞれ8mmに形成され、前板部5aと後板部5bとの中
央の薄い部分は厚さ0.15mmに形成されて、共振周
波数が約6KHzに作成されるとともに、磁気ヘッドの
変位に十分追従して変位できるようになっている。また
支持バネ部材6の長さを短くし、磁気ヘッド7とセンサ
ーブロック5との距離を2cm程度にして、精度よく測
定できるようにした。
In this embodiment, the sensor block 5 is made of aluminum, and its size is 12 mm in height,
The upper and lower thick plate portions 5c have a thickness of 3 mm, the lower surface has a vertical and horizontal length of 8 mm, and the central thin portion between the front plate portion 5a and the rear plate portion 5b has a thickness of 0.15 mm. The frequency is set to about 6 KHz and the magnetic head can be displaced sufficiently following the displacement. Further, the length of the support spring member 6 is shortened and the distance between the magnetic head 7 and the sensor block 5 is set to about 2 cm so that accurate measurement can be performed.

【0012】上記構成の摩擦テスト装置により、ディス
ク回転起動時の磁気ディスクに対する磁気ヘッドが受け
る摩擦力を時間経過とともに測定して図2に示した。ま
た比較のため従来例の測定法、すなわち磁気ヘッドを支
持する長いアームの基部に歪ゲージを取付けた摩擦テス
ト装置により、前記同様に摩擦力を測定して図3に示し
た。図2、3からわかるように、従来例の場合はアーム
が共振するために測定値の振幅が大きくて正確な値が測
定できないが、本発明による測定値は振幅が小さく、正
確な測定ができる。
FIG. 2 shows the frictional force received by the magnetic head with respect to the magnetic disk at the time of starting the rotation of the disk, which was measured with the passage of time by the friction tester having the above structure. For comparison, the frictional force was measured in the same manner as described above by a conventional measuring method, that is, a friction tester in which a strain gauge was attached to the base of a long arm supporting the magnetic head, and the results are shown in FIG. As can be seen from FIGS. 2 and 3, the amplitude of the measured value is large and an accurate value cannot be measured in the case of the conventional example because the arm resonates, but the measured value according to the present invention has a small amplitude and an accurate measurement can be performed. ..

【0013】次ぎに本発明の第2実施例を図4により説
明する。この実施例は、複数の磁気ディスクを同時に回
転駆動するとともに、それぞれの磁気ディスクに接触さ
れた磁気ヘッドとの摩擦力がセンサーで測定できるよう
にしたものである。そのため被測定用の複数の磁気ディ
スクをそれぞれ回転させる複数の回転駆動装置11が設
けられ、それらは実機のドライブを使用してもよいし前
記実施例と同様の回転駆動装置でもよく、各回転駆動装
置11に保持した磁気ディスクに磁気ヘッド12がそれ
ぞれ接触可能に配置されている。なお磁気ヘッド12の
支持状態は、前記実施例のようにジンバル6aを先端に
取付けた支持バネ部材6とセンサーブロック5を介して
支持アーム等に保持させるのが望ましい。
Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, a plurality of magnetic disks are driven to rotate at the same time, and a frictional force with a magnetic head in contact with each magnetic disk can be measured by a sensor. Therefore, a plurality of rotary drive devices 11 for respectively rotating a plurality of magnetic disks to be measured are provided, which may be drives of an actual machine or may be the same rotary drive devices as in the above-mentioned embodiment. The magnetic heads 12 are arranged so as to be in contact with the magnetic disks held by the device 11. The magnetic head 12 is preferably supported by a support arm or the like via the support spring member 6 having the gimbal 6a attached to the tip and the sensor block 5 as in the above embodiment.

【0014】各回転駆動装置11ごとに、磁気ヘッド1
2に作用する摩擦力に応じた変位を検出する歪センサー
13が設けられ、各歪センサー13で構成されるブリッ
ジ回路の検出信号はセンサーアンプ13aを介して記録
装置14に入力されるようになっている。また各回転駆
動装置11は、コンピュータ15に制御される駆動制御
装置16により回転の開始、停止が制御されるようにな
っており、記録装置14もコンピュータ15に制御され
るようになっている。そして各回転駆動装置11が駆動
制御装置16により制御されることにより、複数の磁気
ディスク1が回転駆動されて、磁気ヘッド7との摩擦力
が各歪センサー13で構成されるブリッジ回路で検出さ
れて自動的に記録装置14に記録される。例えば磁気デ
ィスクの回転および停止のON、OFF状態と時間との
関係、および摩擦力と時間との関係は、図5に示すよう
になる。
The magnetic head 1 is provided for each rotary drive unit 11.
A strain sensor 13 that detects a displacement according to a frictional force acting on the second strain sensor 2 is provided, and a detection signal of a bridge circuit configured by each strain sensor 13 is input to the recording device 14 via a sensor amplifier 13a. ing. The rotation control device 16 controlled by the computer 15 controls the start and stop of rotation of each rotation drive device 11, and the recording device 14 is also controlled by the computer 15. Then, by controlling each rotary drive device 11 by the drive control device 16, the plurality of magnetic disks 1 are rotationally driven, and the frictional force with the magnetic head 7 is detected by the bridge circuit configured by each strain sensor 13. And automatically recorded in the recording device 14. For example, the relationship between the ON and OFF states of rotation and stop of the magnetic disk and time, and the relationship between the frictional force and time are as shown in FIG.

【0015】[0015]

【発明の効果】本発明の磁気ディスクの摩擦テスト装置
では、歪ゲージを接着するセンサーブロックを、互いに
平行な上下方向の前板部と後板部の上下をそれぞれ水平
厚板部で連結した形状に構成し、センサーブロック部分
の共振周波数が支持バネ部材より高く構成したので、歪
ゲージがセンサーブロックを介して共振するようなこと
はなく、測定値が正確になリ、さらに歪量の変動が急激
な場合でも十分な応答性が得られる。また、複数の回転
駆動装置とセンサーと駆動制御装置と記録装置とを設け
た磁気ディスクの摩擦テスト装置では、複数台の回転駆
動装置を駆動制御することにより測定効率を向上でき、
任意の回転駆動装置を自由にテスト開始、終了させるこ
とができる。
In the magnetic disk friction test apparatus of the present invention, the sensor blocks to which the strain gauges are adhered have a shape in which the upper and lower front plate portions and the rear plate portion in the vertical direction parallel to each other are connected by horizontal thick plate portions. Since the resonance frequency of the sensor block part is higher than that of the support spring member, the strain gauge does not resonate through the sensor block, the measured value is accurate, and the strain amount changes Sufficient responsiveness can be obtained even in a sudden case. Further, in a magnetic disk friction test device provided with a plurality of rotary drive devices, sensors, a drive control device, and a recording device, it is possible to improve measurement efficiency by controlling the drive of a plurality of rotary drive devices.
It is possible to freely start and end the test of any rotary drive device.

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

【図1】本発明の磁気ディスクの摩擦テスト装置の概略
説明図である。
FIG. 1 is a schematic explanatory diagram of a magnetic disk friction test apparatus of the present invention.

【図2】本発明の摩擦テスト装置での摩擦力と時間との
関係図である。
FIG. 2 is a diagram showing the relationship between friction force and time in the friction test device of the present invention.

【図3】従来の摩擦テスト装置での摩擦力と時間との関
係図である。
FIG. 3 is a relationship diagram between friction force and time in a conventional friction test device.

【図4】第2実施例の磁気ディスクの摩擦テスト装置の
概略図である。
FIG. 4 is a schematic diagram of a magnetic disk friction test apparatus according to a second embodiment.

【図5】第2実施例での回転駆動装置の駆動と測定値の
関係図である。
FIG. 5 is a diagram showing the relationship between the drive of the rotary drive device and the measured value in the second embodiment.

【符号の説明】[Explanation of symbols]

3 回転駆動装置 5 センサーブロック 6 支持バネ部材 7 磁気ヘッド 8 歪ゲージ 3 Rotation drive device 5 Sensor block 6 Support spring member 7 Magnetic head 8 Strain gauge

───────────────────────────────────────────────────── フロントページの続き (72)発明者 篠原 肇 埼玉県熊谷市三ケ尻5200番地日立金属株式 会社磁性材料研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hajime Shinohara 5200 Mikashiri, Kumagaya, Saitama Hitachi Metals Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 磁気ディスクに磁気ヘッドを接触させ、
磁気ヘッドに作用する摩擦力を検出するようにした磁気
ディスクの摩擦テスト装置において、互いに平行な上下
方向の前板部と後板部の上下をそれぞれ水平厚板部で連
結した形状のセンサーブロックの上部を、磁気ディスク
近くに突出する支持アームに取付け、センサーブロック
の前板部及び後板部に歪ゲージを接着するとともに、セ
ンサーブロックの下部から支持バネ部材を突出させて、
支持バネ部材先端のジンバルに磁気ヘッドを取付け、セ
ンサーブロックの共振周波数が支持バネ部材の共振周波
数より100Hz以上高いことを特徴とする磁気ディス
クの摩擦テスト装置。
1. A magnetic head is brought into contact with a magnetic disk,
In a friction test device for a magnetic disk that detects a frictional force acting on a magnetic head, a sensor block having a shape in which a front plate portion and a rear plate portion in the vertical direction parallel to each other are connected by horizontal thick plate portions respectively Attach the upper part to the support arm protruding near the magnetic disk, adhere the strain gauge to the front plate part and the rear plate part of the sensor block, and project the support spring member from the lower part of the sensor block.
A magnetic disk friction test device, wherein a magnetic head is attached to the gimbal at the tip of the support spring member, and the resonance frequency of the sensor block is higher than the resonance frequency of the support spring member by 100 Hz or more.
【請求項2】 磁気ディスクに磁気ヘッドを接触させ、
磁気ヘッドに作用する摩擦力を検出するようにした磁気
ディスクの摩擦テスト装置において、被測定用の複数の
磁気ディスクをそれぞれ回転させる複数の回転駆動装置
と、各回転駆動装置ごとに設けられて磁気ヘッドに作用
する摩擦力に応じた変位を検出する複数のセンサーと、
各回転駆動装置の回転状態を自動制御する駆動制御装置
と、各センサーの検出値を自動的に記録する記録装置と
を備え、複数の磁気ディスクの摩擦力を自動的に測定で
きるようにしたことを特徴とする磁気ディスクの摩擦テ
スト装置。
2. A magnetic head is brought into contact with a magnetic disk,
In a friction test device for a magnetic disk that detects a frictional force acting on a magnetic head, a plurality of rotary drive devices for respectively rotating a plurality of magnetic disks to be measured, and a magnetic drive device provided for each rotary drive device are provided. Multiple sensors that detect displacement according to the frictional force acting on the head,
A drive control device that automatically controls the rotation state of each rotation drive device and a recording device that automatically records the detection value of each sensor so that the frictional force of multiple magnetic disks can be automatically measured. A magnetic disk friction tester characterized by.
JP12002892A 1992-04-14 1992-04-14 Friction testing apparatus for magnetic disk Pending JPH05288670A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12002892A JPH05288670A (en) 1992-04-14 1992-04-14 Friction testing apparatus for magnetic disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12002892A JPH05288670A (en) 1992-04-14 1992-04-14 Friction testing apparatus for magnetic disk

Publications (1)

Publication Number Publication Date
JPH05288670A true JPH05288670A (en) 1993-11-02

Family

ID=14776125

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12002892A Pending JPH05288670A (en) 1992-04-14 1992-04-14 Friction testing apparatus for magnetic disk

Country Status (1)

Country Link
JP (1) JPH05288670A (en)

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