CN102672602A - Error correction method for center height of main shaft of grinding machine - Google Patents
Error correction method for center height of main shaft of grinding machine Download PDFInfo
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- CN102672602A CN102672602A CN2012101674816A CN201210167481A CN102672602A CN 102672602 A CN102672602 A CN 102672602A CN 2012101674816 A CN2012101674816 A CN 2012101674816A CN 201210167481 A CN201210167481 A CN 201210167481A CN 102672602 A CN102672602 A CN 102672602A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012937 correction Methods 0.000 title abstract description 7
- 238000004364 calculation method Methods 0.000 claims abstract description 4
- 238000003754 machining Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910001651 emery Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
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Abstract
The invention belongs to the technical field of machining, in particular to an error correction method for the center height of a main shaft of a grinding machine. The error correction method is characterized in that a series of center height errors are set according to parameters of a grinding workpiece, so that a corresponding circular degree series numerical value reference system can be obtained; the good linear correlation between the center height error value and the circular degree error can be obtained according to an infinitesimal method principle and the theoretical calculation when the error series is detailed enough; when no center height error of the main shaft and no other geometrical error are assumed in a numerical control system, a sample is ground and the circular degree of the sample is measured, and the outline circular degree value of the sample and the phase value corresponding to the outline circular degree value can be obtained; the circular degree error value that is obtained through measurement is compared with the circular degree series reference system of the workpiece, the center height error value of the main shaft of the grinding machine corresponding to the circular degree error can be obtained according to the linear correlation, then the center height error is compensated in a numerical control manner in the numerical control system, and finally the circular degree error caused by the center height of the main shaft can be compensated. The error correction method has the advantages of reasonable scheme, high error recognition accuracy of the measuring method and favorable correction effect.
Description
Technical field
The invention belongs to the Machining Technology field, specifically is the high level error bearing calibration of a kind of grinding machine spindle center.
Background technology
At Precision Machining and ultraprecise manufacture field, grinding usually makes machine components reach designing requirement as the final manufacturing procedure in the technological process.The surface size of part and geometric accuracy can directly influence the service property (quality) and the life-span of product.Point of contact tracking filing has the processing flexibility height, many outstanding advantages such as efficient height when eccentric parts such as machining crankshafts connecting rod neck.But its machining accuracy depends on accurate geometrical model, and the geometric error of lathe can influence bent axle circularity greatly.If the geometric parameter of lathe has deviation in follow grinding, with the circularity that directly influences the connecting rod neck.And in process, the change of some geometric parameters and deviation are inevitably, and are difficult to even can't carry out accurate on-line measurement man-hour adding.Particularly grinding machine spindle center (being emery wheel centre frame center) is difficult to eliminate fully with the vertical deviation that machine tool rotary center (being grinding machine turntable center) exists when mounted, produces deviation along with environment or grinding process variations in temperature also can cause centre-height.Alignment of shafts high level error not only can cause the scale error of grinding part, also can cause bigger deviation from circular from, must in process, carry out the numerical control compensation.The method that in actual lathe debugging, often relies on rich experience that error is tried the value of making up the number or amount compensates it, exists bigger blindness.And complicacy not only is installed as adopting special-purpose laser detection equipment that on-the-spot grinding height error is detected, and must increase equipment cost greatly, lowering efficiency, its data is inconvenient simultaneously.Aspect the error correction of follow grinding machine tool chief axis centre-height, also there is not scientific and reasonable, the simple method of a kind of scheme at present.
Summary of the invention
The objective of the invention is deficiency to prior art; The grinding machine spindle center high level error bearing calibration that a kind of scientific and reasonable, error identification precision is high, calibration result is good is provided; This method has been simplified equipment and data, can improve grinding accuracy and production efficiency.
The technical solution adopted for the present invention to solve the technical problems is:
The high level error bearing calibration of a kind of grinding machine spindle center; It is characterized in that: according to the grinding work piece parameter; A series of center high level error is set, can gets corresponding circularity series of values reference system, when error series is enough fine and closely woven; According to imfinitesimal method principle and Theoretical Calculation, can obtain between center high level error value and the deviation from circular from good linear relationship being arranged; Supposition does not have alignment of shafts height and other geometric error in digital control system; (be about to parameter all be made as perfect condition and do not carry out the numerical control compensation); Sample is carried out grinding, and measure sample (like crank-shaft link neck) circularity, can obtain sample profile circularities and corresponding phase value thereof; When the alignment of shafts is more on the low side than the turntable centre of gyration; Deviation from circular from peak-to-peak value (being the major axis of connecting rod neck elliptic contour) place phase place is that the negative error sensitive direction is the line of phase place 0 degree and 180 degree, and the higher positive error sensitive direction that causes of the alignment of shafts then is phase place 90 degree and 270 degree lines.To measure gained roundness error contrast workpiece circularity series reference system; Obtain the corresponding grinding machine spindle center high level error value of this deviation from circular from according to its linear relationship; In digital control system, this center high level error is carried out the numerical control compensation again, the deviation from circular from that alignment of shafts height causes is fallen in final compensation.
The present invention owing to earlier according to the grinding work piece parameter, a series of center high level error is set through calculating corresponding circularity series of values standard is; Through the grinding sample; The circularity of test samples is converted to the center high level error according to the sample circularities that obtains in the follow-up grinding again, thereby realizes accurate identification of grinding machine spindle height error and method of correcting with round-about way; Simplify equipment and data, improved grinding accuracy and production efficiency.
The present invention program rationally, measuring method error identification precision is high, and calibration result is good, is applicable to the multiple field that need proofread and correct grinding machine spindle center height.
Description of drawings
The roundness error of workpiece sketch map that Fig. 1 causes for alignment of shafts high level error of the present invention.
Fig. 2 is the size and the PHASE DISTRIBUTION sketch map of not concentricity high level error lower link roundness error.
The specific embodiment
As shown in Figure 1,1 is the grinding machine turntable, O
1Be the grinding machine centre of gyration, 2 are the crank-shaft link neck in the grinding, and 3 is emery wheel, O
2Be the emery wheel center.Work as O
1With O
2When having difference in height Δ h (being alignment of shafts high level error), will cause the connecting rod roundness error of grinding, its profile is similar to ellipse, and the peak value of its deviation from circular from is directly related with Δ h.In conjunction with Fig. 2, Δ h be correct time the deviation from circular from peak value at phase place 90 degree and 270 degree lines, and when being negative, the circularity peak-to-peak value is spent lines at phase place 0 degree and 180.
The high bearing calibration in a kind of grinding machine spindle of the present invention center, concrete steps are following:
A, confirm one center high level error corresponding circularity series of values reference system
According to the workpiece parameter of wanting grinding; Comprise the crank-shaft link neck eccentric throw; The grinding desired value of grinding wheel radius and connecting rod neck; A series of center high level error is set; Can obtain corresponding circularity series of values reference system by calculating; As shown in Figure 1; Within the specific limits promptly when reference point is enough close; According to imfinitesimal method principle and Theoretical Calculation; The roundness deviation value with cause that the main shaft height error of its deviation is linear; And its circularity peak-to-peak value phase place and main shaft height error relation are clear and definite; Main shaft is that error is timing than centre of gyration height, and connecting rod roundness error peak peak phase is 90 degree and 270 degree, and phase place was 0 degree and 180 degree when error was negative;
B, sample grinding and roundness measurement
One sample is set; Supposition does not have the lathe height error in digital control system; Be about to parameter and be made as perfect condition and do not carry out the numerical control compensation, sample is carried out grinding, re-use circularity measuring apparatus; Sample circularity is measured, can be obtained sample profile circularity and corresponding phase value (as shown in Figure 2) thereof;
C, sample circularity are analyzed
Circularity and phase data to measuring gained are analyzed, and the deviation from circular from of measuring gained is consulted the circularity series of values reference system by the steps A gained, obtain the corresponding grinding machine spindle center high level error value of this deviation from circular from easily according to its linear relationship.
D, correction
According to the grinding machine spindle center high level error value of obtaining, in digital control system, this center high level error is carried out the numerical control compensation, the deviation from circular from that alignment of shafts height causes is fallen in final compensation.
The present invention program rationally, measuring method error identification precision is high, and calibration result is good, is applicable to the multiple field that need proofread and correct grinding machine spindle center height.
Claims (2)
1. grinding machine spindle center high level error bearing calibration; It is characterized in that: according to the grinding work piece parameter; A series of center high level error is set, can gets corresponding circularity series of values reference system, when error series is enough fine and closely woven; According to imfinitesimal method principle and Theoretical Calculation, can obtain between center high level error value and the deviation from circular from good linear relationship being arranged; Supposition does not have alignment of shafts height and other geometric error in digital control system, and sample is carried out grinding, and measures sample circularity, can obtain sample profile circularities and corresponding phase value thereof; To measure gained roundness error contrast workpiece circularity series reference system; Obtain the corresponding grinding machine spindle center high level error value of this deviation from circular from according to its linear relationship; In digital control system, this center high level error is carried out the numerical control compensation again, the deviation from circular from that alignment of shafts height causes is fallen in final compensation.
2. the high level error bearing calibration of grinding machine spindle according to claim 1 center is characterized in that: said grinding work piece parameter comprises the crank-shaft link neck eccentric throw, the grinding desired value of grinding wheel radius and connecting rod neck.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101674816A CN102672602A (en) | 2012-05-23 | 2012-05-23 | Error correction method for center height of main shaft of grinding machine |
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| CN2012101674816A CN102672602A (en) | 2012-05-23 | 2012-05-23 | Error correction method for center height of main shaft of grinding machine |
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| CN102672602A true CN102672602A (en) | 2012-09-19 |
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| CN2012101674816A Pending CN102672602A (en) | 2012-05-23 | 2012-05-23 | Error correction method for center height of main shaft of grinding machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483928A (en) * | 2017-01-03 | 2017-03-08 | 重庆大学 | A kind of dry chain digital control gear hobbing machine bed radial heat distortion error of cutting is in machine real-time compensation method |
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2012
- 2012-05-23 CN CN2012101674816A patent/CN102672602A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483928A (en) * | 2017-01-03 | 2017-03-08 | 重庆大学 | A kind of dry chain digital control gear hobbing machine bed radial heat distortion error of cutting is in machine real-time compensation method |
| CN106483928B (en) * | 2017-01-03 | 2019-01-29 | 重庆大学 | The dry chain digital control gear hobbing machine bed radial heat distortion error of cutting of one kind is in machine real-time compensation method |
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Application publication date: 20120919 |