CN1811924A - Magnetic head assembly balance detecting device - Google Patents
Magnetic head assembly balance detecting device Download PDFInfo
- Publication number
- CN1811924A CN1811924A CN 200510021936 CN200510021936A CN1811924A CN 1811924 A CN1811924 A CN 1811924A CN 200510021936 CN200510021936 CN 200510021936 CN 200510021936 A CN200510021936 A CN 200510021936A CN 1811924 A CN1811924 A CN 1811924A
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- CN
- China
- Prior art keywords
- roller bearing
- detecting device
- magnetic head
- head assembly
- hole
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- 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.)
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- Rolling Contact Bearings (AREA)
- Testing Of Balance (AREA)
Abstract
This invention discloses a balance test device for HD head components including a test platform and a roller, in which, said test platform includes a knife wall set vertically with a level blade on the top, the section of the roller is round rolling horizontally on the blade freely, the diameter of the roller is smaller than the inner hole of the bearing hole of a being tested head component and a fastening unit is set on the roller to fix the head component passing through on the roller by the bearing hole so as to test the balance of the head by a level blade and a roller rolling freely on the blade horizontally.
Description
[technical field]
The present invention relates to the head stack employed auxiliary detection equipment when design or manufacturing in the hard disk, specifically relate to a kind of magnetic head assembly balance detecting device.
[background technology]
Head stack claims " head heap " again, is important precise part in the hard disk, and its structure can be divided into three parts basically: head arm, bearing holder (housing, cover) and coil.Head arm and coil branch are listed in the both sides of bearing holder (housing, cover), and whole head stack serves as that axle is rotated with the rotating shaft of bearing holder (housing, cover).Because head stack is very accurate, the head portion that particularly is positioned at the head arm top very easily damages, therefore when the hard disk stall magnetic head need rest on disc open/stop distinguish or the slideway of skewback in.In order to guarantee the stability of head position, when transportation and use, wish that all it can be subjected to the little interference of trying one's best, this just requires the center of gravity of whole head stack can drop in its rotating shaft.If skew appears in center of gravity, then be in non-horizontal level or rock when middle when head stack, head arm all may rotate under gravity or action of inertia, thereby makes magnetic head depart from the magnetic track at its place or deviate from its residing safety zone.Therefore in the design of hard disk, it is crucial keeping the balance of head stack.
[summary of the invention]
The purpose of this invention is to provide a kind of device that can detect the balance quality of head stack by shirtsleeve operation.
Further aim of the present invention provides a kind of magnetic head assembly balance detecting device that can quantitatively measure the head stack balance deviation.
The technical scheme that realizes above-mentioned purpose is: a kind of magnetic head assembly balance detecting device, comprise monitor station and roller bearing, and described monitor station comprises vertically disposed cutter wall, the edge of a knife that described cutter wall top has level; Described roller bearing cross section is circular, can be on the edge of a knife free horizontal rolling, the roller bearing diameter has securing member less than the internal diameter of head stack dead eye to be detected on the roller bearing, the head stack that is located on the roller bearing by dead eye can be fixed.
For realizing further aim of the present invention, above-mentioned detection device also comprises the quantification dish, and described quantification dish is circular, is fixed on one heart on the roller bearing, and the equally spaced through hole that is provided with can be placed balancing weight in the described through hole at least one concentric circumferences of quantification dish card.
Further, on the card of described quantification dish also mark to have with a radius be the deflection angle of initial other position.
Preferably, the equally spaced through hole that is provided with on two of described quantification panel surface concentric circumferences; One of ring through hole is initial in addition, and every deflection 10 degree of all the other outer ring through hole are provided with one; Interior ring through hole is with this initial 5 degree beginnings of outer ring through hole deflection certainly, and every deflection 20 degree are provided with one.
The monitor station of above-mentioned detection device also comprises base, and described cutter wall is vertically fixed on the base.
Preferably, also have not three screw holes of conllinear on the described base, three pieces of screws are distinguished vertical screw-in wherein, make it possible to adjust by the degree of depth that changes the screw screw-in horizontality of base.
Preferably, described securing member is coaxial boss and the nut with matching that protrudes from roller bearing, head stack can be clipped in the middle and lock.
The present invention adopts technique scheme, beneficial technical effects is: 1) the horizontal edge of a knife of employing and can measuring the balance of head stack in simple mode by the free rolling roller assembly on the edge of a knife, because roller bearing almost is a contact with contacting of the edge of a knife, therefore friction force is very little, can guarantee the higher detection degree of accuracy.2) adopt and can determine that the position increases the quantification dish of balancing weight, the center of gravity deviation that can quantitatively predict head stack by the position and the weight of balancing weight interpolation is to revise accurately and to handle.
Below by embodiment also in conjunction with the accompanying drawings, the present invention is described in further detail.
[description of drawings]
Fig. 1 is a kind of magnetic head assembly balance detecting device structural representation.
Fig. 2 is a quantification dish synoptic diagram among Fig. 1.
Fig. 3 is a kind of head stack synoptic diagram to be detected.
Fig. 4 is that head stack to be detected is fixed on the synoptic diagram on the roller bearing.
[embodiment]
A kind of magnetic head assembly balance detecting device as depicted in figs. 1 and 2, comprises monitor station, roller bearing 1 and quantification dish 2, and described monitor station comprises cutter wall 3 and base 4.Cutter wall 3 is vertically fixed on the base 4, and its top has the edge of a knife 31 of level; Have not three screw holes 41 of conllinear (can only see wherein two among Fig. 1, also have and sheltered from by left side cutter wall) on the base, the vertical respectively screw-in of three pieces of screws wherein makes it possible to adjust the horizontality of base by changing the degree of depth that screw screws in.
Roller bearing 1 cross section is circular, can be on the edge of a knife free horizontal rolling, the roller bearing diameter is less than the internal diameter of head stack dead eye to be detected, the coaxial boss 11 and the nut with matching 12 that have protrusion on the roller bearing, the one or both sides of coaxial boss 11 have diameter less than boss 11 but greater than the coaxial shoulder 13 of roller bearing diameter, the diameter of shoulder 13 is slightly less than the dead eye internal diameter of head stack to be measured.After head stack is located on the coaxial shoulder 13 by dead eye, is sandwiched in the middle of boss 11 and the nut 12 and and locks by nut 12.
Quantification dish 2 is circular, is fixed on one heart on the roller bearing 1, and its structure as shown in Figure 2.The card subscript is marked with the deflection angle of a radius (shown in dot-and-dash line among Fig. 2) for other initial position.The also equally spaced through hole that is provided with on two concentric circumferences of quantification panel surface; Outer ring through hole is initial from 0 degree, is spaced apart 10 degree; Interior ring through hole is initial from 5 degree, is spaced apart 20 degree.Can place balancing weight in the through hole, for example decide things such as quality screw.
Specific operation process:
1, base leveling: guarantee the accurate of measurement result, the level of the edge of a knife is very important, therefore needs the base 4 of monitor station is carried out the levelness adjustment before test.Monitor station should be placed on stable and on the even curface, level meter is placed on base 4 upper surfaces (level meter that also can install and fix on the base 4), makes it to be up to the standard by three pieces of screws adjusting on the base 4.
2, roller bearing and quantification dish balance calibration: roller bearing that coaxial cooperation is good and quantification dish are placed on the edge of a knife after the leveling gently, rotatable roller bearing is placed several times so that different positions, if the quantification dish does not rotate and promptly represents whole machine balancing, if imbalance then needs to use balancing weight to calibrate, the detailed process of calibration can be with reference to the balance calibration process of head stack in the following step 4.
3, fixed head assembly: in conjunction with Fig. 3 and Fig. 4, head stack to be detected is located on the roller bearing 1 by dead eye A, and move to the position of boss 11, then nut 12 also is through on the roller bearing 1 and screws togather near the part of roller bearings 1 head stack is locked on the roller bearing 1 with boss 11.Note preferably allowing head stack extend in the time of fixing along the initial reticle of quantification dish 2 (just scale 0 ° position) direction.
4, balance test and adjusting: the roller bearing frame that will load onto head stack to be detected gently unclamps hand on two parallel row's edges of a knife, if the center of gravity of head stack drops on the center line of roller bearing, then head stack can remain on this state; Otherwise head stack can deflection until its center of gravity fall within roller bearing under.
The degree that just needs quantitative measurement center of gravity deviation after the appearance deviation, can adopt following process: decide quality balancing weight (for example deciding quality screw, bolt etc.) be placed on the rightabout outer ring through hole of head stack center of gravity in, carrying out to adopt estimation to add the method that intermediate value is approached when quality is selected, rotation quantification dish 2 make head stack the deviation of gravity center roller bearing under, coil the direction and the speed of 2 deflections according to unclamping quantification behind the hand then, determine the increase or the minimizing of quality, make quantification dish 2 decide the quality balancing weight to what gentlier hold deflection and deflection speed minimum up to finding out.Move to vertical direction gradually from horizontal direction the position that will decide the quality balancing weight then, be placed in the different outer ring through hole, carrying out to adopt estimation to add the method that intermediate value is approached equally when through hole is selected, in the process of trickle adjustment, can utilize the interior ring through hole that closes on to carry out more accurate adjustment.Can with arbitrarily angled quilt frame gently on parallel two row's edges of a knife and do not rotate, note the quality and the residing position of deciding the quality balancing weight of using up to the roller bearing of loading onto head stack to be detected.
5, calculation deviation and correction: the center of gravity deviation that can calculate head stack according to above-mentioned measurement data easily, revise design size to reach balance according to computational data, the correcting mode of most convenient be heavier end really allocation wear the hole of suitable size, the moment of torsion that excision material phase countershaft is produced balancing weight proper and in the measurement is identical, can make head stack restore balance.
Said process can repeat repeatedly in the design process of head stack, to reach the standard that needs.If be not used in the quantitative test in the design, adopt the device of no quantification dish also can carry out the quality of balance detection to the head stack product efficiently, for the quality control on the production line is offered help.
Claims (8)
1, a kind of magnetic head assembly balance detecting device is characterized in that: comprise monitor station and roller bearing, described monitor station comprises vertically disposed cutter wall, the edge of a knife that described cutter wall top has level; Described roller bearing cross section is circular, can be on the edge of a knife free horizontal rolling, the roller bearing diameter has securing member less than the internal diameter of head stack dead eye to be detected on the roller bearing, the head stack that is located on the roller bearing by dead eye can be fixed.
2, magnetic head assembly balance detecting device according to claim 1, it is characterized in that: also comprise the quantification dish, described quantification dish is circular, is fixed on the roller bearing with one heart, the equally spaced through hole that is provided with can be placed balancing weight in the described through hole at least one concentric circumferences of quantification dish card.
3, magnetic head assembly balance detecting device according to claim 2 is characterized in that: on the card of described quantification dish also mark to have with a radius be the deflection angle of initial other position.
4, magnetic head assembly balance detecting device according to claim 3 is characterized in that: the equally spaced through hole that is provided with on two concentric circumferences of described quantification panel surface; One of ring through hole is initial in addition, and every deflection 10 degree of all the other outer ring through hole are provided with one; Interior ring through hole is with this initial 5 degree beginnings of outer ring through hole deflection certainly, and every deflection 20 degree are provided with one.
5, according to any described magnetic head assembly balance detecting device of claim 1～4, it is characterized in that: described monitor station also comprises base, and described cutter wall is vertically fixed on the base.
6, magnetic head assembly balance detecting device according to claim 5, it is characterized in that: also have not three screw holes of conllinear on the described base, three pieces of screws are distinguished vertical screw-in wherein, make it possible to adjust by the degree of depth that changes the screw screw-in horizontality of base.
7, according to any described magnetic head assembly balance detecting device of claim 1～4, it is characterized in that: described securing member is coaxial boss and the nut with matching that protrudes from roller bearing, head stack can be clipped in the middle and lock.
8, magnetic head assembly balance detecting device according to claim 6 is characterized in that: described securing member is coaxial boss and the nut with matching that protrudes from roller bearing, head stack can be clipped in the middle and lock.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100219363A CN100367354C (en) | 2005-10-19 | 2005-10-19 | Magnetic head assembly balance detecting device |
| HK06110638A HK1088707A1 (en) | 2005-10-19 | 2006-09-22 | A balancing detection device for head stack of hard disks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100219363A CN100367354C (en) | 2005-10-19 | 2005-10-19 | Magnetic head assembly balance detecting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1811924A true CN1811924A (en) | 2006-08-02 |
| CN100367354C CN100367354C (en) | 2008-02-06 |
Family
ID=36844806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100219363A Expired - Fee Related CN100367354C (en) | 2005-10-19 | 2005-10-19 | Magnetic head assembly balance detecting device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100367354C (en) |
| HK (1) | HK1088707A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115725A (en) * | 2013-01-16 | 2013-05-22 | 长沙赛尔透平机械有限公司 | Balancing device and balancing method for dynamic balancing test before impeller over speed |
| CN111999776A (en) * | 2020-08-11 | 2020-11-27 | 北京惠风联合防务科技有限公司 | Gravity center detection device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03282227A (en) * | 1990-03-30 | 1991-12-12 | Takaoka Electric Mfg Co Ltd | Balancing method for rotor |
| US5355729A (en) * | 1992-01-24 | 1994-10-18 | Hunter Engineering Company | Split weight wheel balancing |
| CN2182400Y (en) * | 1992-10-31 | 1994-11-09 | 北京燕山石油化工公司炼油厂 | Magnetic equalizing measuring implement |
| CN1295488C (en) * | 2003-06-14 | 2007-01-17 | 重庆大学 | Balance plate and its digital correction method |
-
2005
- 2005-10-19 CN CNB2005100219363A patent/CN100367354C/en not_active Expired - Fee Related
-
2006
- 2006-09-22 HK HK06110638A patent/HK1088707A1/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115725A (en) * | 2013-01-16 | 2013-05-22 | 长沙赛尔透平机械有限公司 | Balancing device and balancing method for dynamic balancing test before impeller over speed |
| CN103115725B (en) * | 2013-01-16 | 2015-06-24 | 长沙赛尔透平机械有限公司 | Balancing device and balancing method for dynamic balancing test before impeller over speed |
| CN111999776A (en) * | 2020-08-11 | 2020-11-27 | 北京惠风联合防务科技有限公司 | Gravity center detection device |
| CN111999776B (en) * | 2020-08-11 | 2023-10-31 | 北京惠风联合防务科技有限公司 | Gravity center detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| HK1088707A1 (en) | 2006-11-10 |
| CN100367354C (en) | 2008-02-06 |
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