CN102773800A - Method for improving roundness precision in follow-up grinding process of connecting rod necks of crank shaft - Google Patents
Method for improving roundness precision in follow-up grinding process of connecting rod necks of crank shaft Download PDFInfo
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- CN102773800A CN102773800A CN2012102910159A CN201210291015A CN102773800A CN 102773800 A CN102773800 A CN 102773800A CN 2012102910159 A CN2012102910159 A CN 2012102910159A CN 201210291015 A CN201210291015 A CN 201210291015A CN 102773800 A CN102773800 A CN 102773800A
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- connecting rod
- neck
- center
- trunnion
- rod neck
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 210000003739 neck Anatomy 0.000 title abstract 14
- 238000003754 machining Methods 0.000 claims abstract description 11
- 230000007812 deficiency Effects 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
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- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The invention belongs to a mechanical machining method and particularly relates to a method for improving roundness precision in a follow-up grinding process of connecting rod necks of a crank shaft. The method comprises the following steps of: calculating a swinging value of a center of each connecting rod neck by measuring the roundness error of a supporting spindle neck by a center rack of a machined sample piece, and subtracting the calculated swinging value of the center of each connecting rod from a roundness error value of each connecting rod neck on the sample piece, so as to obtain a machining compensation value of each connecting rod neck when the roundness error of the supporting spindle neck is zero; then measuring a roundness error value of the supporting spindle neck of the machined piece, and calculating a swinging value of the center of the spindle neck corresponding to the roundness error value when the crank shaft rotates, so as to further calculate the swinging value of the center of each connecting rod neck when the machined crank shaft rotates; and adding a machining compensation value of each connecting neck when the calculated roundness error of the spindle neck is zero to a negative value of the swinging value at the center of each connecting rod neck when the crank shaft of the machined work piece rotates, so as to obtain a machining compensation value of each connecting rod neck of the machined work piece. With the adoption of the method provided by the invention, the roundness error caused by deformation of the center rack in a crank shaft machining process can be effectively compensated.
Description
Technical field
The invention belongs to the machining class, specifically is a kind of method that improves the circularity precision of crank-shaft link neck follow grinding.
Background technology
In crank-shaft link neck follow grinding process; The raising of circularity precision is a very important ring, in order to improve the circularity precision, generally is on lathe, to process an exemplar earlier; Exemplar is taken the deviation from circular from of measuring each connecting rod neck on the special-purpose roundness measuring instrument; Again the roundness error of measuring is worth by way of compensation and is input on the machining tool, revising the movement locus of emery wheel, thereby improve the circularity precision of workpiece crank-shaft link neck.But generally speaking; Follow grinding connecting rod neck is to support with the location, two ends, with the centre frame on the trunnion to process; Because the trunnion between each workpiece and the exemplar (centre frame supports shelves) circularity size and deformation direction are all different; And the trunnion of different circularity has different swinging tracks under the clamping of centre frame, and when the big or small direction difference of the trunnion circularity of exemplar and workpiece was big more, the deviation from circular from of workpiece was also big more like this.
Summary of the invention
The objective of the invention is the deficiency to prior art, a kind of method of circularity precision of the follow grinding that improves crank-shaft link neck is provided, this method can avoid the trunnion deviation from circular from of exemplar and workpiece to influence the circularity precision of workpiece follow grinding.
Technical scheme of the present invention is following:
A kind of method that improves the follow grinding circularity precision of crank-shaft link neck; It is characterized in that: through measuring the deviation from circular from of the centre frame supports main shaft neck after exemplar is processed; The trunnion that forms owing to the trunnion deviation from circular from when obtaining crankshaft rotating is with respect to the movement locus of centre frame; Calculate the oscillating quantity at each connecting rod neck center; Can the be supported processing offset of trunnion deviation from circular from each connecting rod neck when being zero of the oscillating quantity that each connecting rod roundness error amount on the exemplar is deducted each the connecting rod neck center that calculates, in processing postorder workpiece process, adopting should processing offset compensation grinding.
The present invention also can be supported behind the processing offset of trunnion deviation from circular from each connecting rod neck when being zero according to said method; Measure the supports main shaft roundness error amount of workpiece again; The oscillating quantity at trunnion center when the bent axle when calculating this error amount rotates; And further calculate the oscillating quantity at machining crankshafts each connecting rod neck center of when rotation, the processing offset of each the connecting rod neck when the trunnion deviation from circular from that calculates is zero during with the workpiece crankshaft rotating negative value addition of the oscillating quantity at each connecting rod neck center can obtain each connecting rod neck of workpiece and process offset.
The present invention is simple and convenient, and is scientific and reasonable, effectively compensated the deviation from circular from that the centre frame distortion causes in the bent axle process.
The specific embodiment
One one kinds of methods that improve the follow grinding circularity precision of crank-shaft link neck of embodiment, concrete steps are
After A, the exemplar completion of processing, not only measure the deviation from circular from of each connecting rod neck, and measure the deviation from circular from of centre frame supports main shaft neck;
B, calculate the trunnion that when crankshaft rotating, forms movement locus with respect to centre frame owing to the trunnion deviation from circular from;
C, because the trunnion center with respect to then also swing thereupon of each connecting rod neck of centre frame center swing, can calculate the oscillating quantity at each connecting rod neck center according to the swing of relative centre frame center, trunnion center;
The to be supported processing offset of trunnion deviation from circular from each connecting rod neck when being zero of D, the oscillating quantity that each connecting rod roundness error amount on the exemplar is deducted each the connecting rod neck center that calculates.
E, in processing postorder workpiece process, adopt the processing offset compensation grinding of this D step.
21 kinds of methods that improve the follow grinding circularity precision of crank-shaft link neck of embodiment, concrete steps are
After A, the exemplar completion of processing, not only measure the deviation from circular from of each connecting rod neck, and measure the deviation from circular from of centre frame supports main shaft neck;
B, calculate the trunnion that when crankshaft rotating, forms movement locus with respect to centre frame owing to the trunnion deviation from circular from;
C, because the trunnion center with respect to then also swing thereupon of each connecting rod neck of centre frame center swing, can calculate the oscillating quantity at each connecting rod neck center according to the swing of relative centre frame center, trunnion center;
The to be supported processing offset of trunnion deviation from circular from each connecting rod neck when being zero of D, the oscillating quantity that each connecting rod roundness error amount on the exemplar is deducted each the connecting rod neck center that calculates;
E, load onto workpiece, measure the supports main shaft roundness error amount of workpiece earlier, the oscillating quantity at trunnion center when the bent axle when calculating error amount rotates, and the oscillating quantity at each connecting rod neck center when further calculating the machining crankshafts rotation;
The processing offset of F, each the connecting rod neck when the trunnion deviation from circular from that the D step is calculated is zero during with the workpiece crankshaft rotating negative value addition of the oscillating quantity at each connecting rod neck center can obtain each connecting rod neck of workpiece and process offset;
G, according to connecting rod neck processing offset machining crankshafts connecting rod neck.
The oscillating quantity and the trunnion center oscillating quantity at each connecting rod neck center of the present invention can draw through FEM calculation, also can measure with measurement method.
Claims (2)
1. method that improves the follow grinding circularity precision of crank-shaft link neck; It is characterized in that: through measuring the deviation from circular from of the centre frame supports main shaft neck after exemplar is processed; The trunnion that forms owing to the trunnion deviation from circular from when obtaining crankshaft rotating is with respect to the movement locus of centre frame; Calculate the oscillating quantity at each connecting rod neck center; Can the be supported processing offset of trunnion deviation from circular from each connecting rod neck when being zero of the oscillating quantity that each connecting rod roundness error amount on the exemplar is deducted each the connecting rod neck center that calculates, in processing postorder workpiece process, adopting should processing offset compensation grinding.
2. method that improves the follow grinding circularity precision of crank-shaft link neck; It is characterized in that: through measuring the deviation from circular from of the centre frame supports main shaft neck after exemplar is processed; The trunnion that forms owing to the trunnion deviation from circular from when obtaining crankshaft rotating is with respect to the movement locus of centre frame; Calculate the oscillating quantity at each connecting rod neck center, the to be supported processing offset of trunnion deviation from circular from each connecting rod neck when being zero of the oscillating quantity that each connecting rod roundness error amount on the exemplar is deducted each the connecting rod neck center that calculates; Measure the supports main shaft roundness error amount of workpiece again, the oscillating quantity at trunnion center when bent axle when calculating error amount rotates, and the oscillating quantity at each connecting rod neck center when further calculating the machining crankshafts rotation; The negative value addition of the oscillating quantity at each connecting rod neck center can obtain each connecting rod neck processing offset of workpiece when the processing offset of each the connecting rod neck when the trunnion deviation from circular from that calculates is zero and workpiece crankshaft rotating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210291015.9A CN102773800B (en) | 2012-08-15 | 2012-08-15 | Method for improving roundness precision in follow-up grinding process of connecting rod necks of crank shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210291015.9A CN102773800B (en) | 2012-08-15 | 2012-08-15 | Method for improving roundness precision in follow-up grinding process of connecting rod necks of crank shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102773800A true CN102773800A (en) | 2012-11-14 |
| CN102773800B CN102773800B (en) | 2014-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210291015.9A Expired - Fee Related CN102773800B (en) | 2012-08-15 | 2012-08-15 | Method for improving roundness precision in follow-up grinding process of connecting rod necks of crank shaft |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103624642A (en) * | 2012-12-03 | 2014-03-12 | 溧阳市瑞威中速柴油机配件有限公司 | Machining method for grinding main journal of crankshaft in floating mode |
| CN107214576A (en) * | 2016-03-21 | 2017-09-29 | 淄博柴油机总公司 | The method that stress is offset in a kind of grinding of crankshaft of diesel engine |
| CN106312711B (en) * | 2016-09-29 | 2018-08-14 | 中车戚墅堰机车有限公司 | The correcting and regulating method of centre frame when bent axle follow-up grinding connecting rod neck |
| CN108763803A (en) * | 2018-06-04 | 2018-11-06 | 东华大学 | The grinding machine analysis method decomposed based on crank-shaft link neck follow grinding profile errors |
| CN116967938A (en) * | 2023-06-15 | 2023-10-31 | 上汽通用五菱汽车股份有限公司 | A method and system for grinding roundness compensation of shaft parts |
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| JPS5457285A (en) * | 1977-10-14 | 1979-05-08 | Komatsu Ltd | Crankshaft mirror control device |
| CN1360534A (en) * | 1999-04-30 | 2002-07-24 | 埃尔温·容克尔机械制造有限公司 | Rough-griding and finish-grinding crankshaft in clamping |
| JP3821345B2 (en) * | 1999-01-29 | 2006-09-13 | 株式会社ジェイテクト | Crank pin grinding method and grinding apparatus |
| CN1851688A (en) * | 2006-05-26 | 2006-10-25 | 上海大学 | Crankshaft non-circular grinding four-point rigidity forced deformation computing method |
| CN1927535A (en) * | 2006-07-21 | 2007-03-14 | 上海大学 | Tracking method of on-line measuring roundness error and machine tool main axle error |
| CN101279438A (en) * | 2008-05-23 | 2008-10-08 | 潘旭华 | Follow measuring method of crankshaft connecting rod roundness |
| WO2009095299A1 (en) * | 2008-02-01 | 2009-08-06 | Erwin Junker Maschinenfabrik Gmbh | Method for grinding the main and rod bearings of a crankshaft through out-of-round grinding and device for carrying out the method |
| DE102009051737B3 (en) * | 2009-11-03 | 2010-10-07 | Erwin Junker Maschinenfabrik Gmbh | Method for grinding main and pin bearings of crankshaft by external cylindrical grinding in grinding machine, involves bringing defined geometric longitudinal axis of crankshaft in accordance with rotation axis of assigned workpiece |
-
2012
- 2012-08-15 CN CN201210291015.9A patent/CN102773800B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5457285A (en) * | 1977-10-14 | 1979-05-08 | Komatsu Ltd | Crankshaft mirror control device |
| JP3821345B2 (en) * | 1999-01-29 | 2006-09-13 | 株式会社ジェイテクト | Crank pin grinding method and grinding apparatus |
| CN1360534A (en) * | 1999-04-30 | 2002-07-24 | 埃尔温·容克尔机械制造有限公司 | Rough-griding and finish-grinding crankshaft in clamping |
| CN1851688A (en) * | 2006-05-26 | 2006-10-25 | 上海大学 | Crankshaft non-circular grinding four-point rigidity forced deformation computing method |
| CN1927535A (en) * | 2006-07-21 | 2007-03-14 | 上海大学 | Tracking method of on-line measuring roundness error and machine tool main axle error |
| WO2009095299A1 (en) * | 2008-02-01 | 2009-08-06 | Erwin Junker Maschinenfabrik Gmbh | Method for grinding the main and rod bearings of a crankshaft through out-of-round grinding and device for carrying out the method |
| CN101279438A (en) * | 2008-05-23 | 2008-10-08 | 潘旭华 | Follow measuring method of crankshaft connecting rod roundness |
| DE102009051737B3 (en) * | 2009-11-03 | 2010-10-07 | Erwin Junker Maschinenfabrik Gmbh | Method for grinding main and pin bearings of crankshaft by external cylindrical grinding in grinding machine, involves bringing defined geometric longitudinal axis of crankshaft in accordance with rotation axis of assigned workpiece |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103624642A (en) * | 2012-12-03 | 2014-03-12 | 溧阳市瑞威中速柴油机配件有限公司 | Machining method for grinding main journal of crankshaft in floating mode |
| CN107214576A (en) * | 2016-03-21 | 2017-09-29 | 淄博柴油机总公司 | The method that stress is offset in a kind of grinding of crankshaft of diesel engine |
| CN106312711B (en) * | 2016-09-29 | 2018-08-14 | 中车戚墅堰机车有限公司 | The correcting and regulating method of centre frame when bent axle follow-up grinding connecting rod neck |
| CN108763803A (en) * | 2018-06-04 | 2018-11-06 | 东华大学 | The grinding machine analysis method decomposed based on crank-shaft link neck follow grinding profile errors |
| CN116967938A (en) * | 2023-06-15 | 2023-10-31 | 上汽通用五菱汽车股份有限公司 | A method and system for grinding roundness compensation of shaft parts |
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| Publication number | Publication date |
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| CN102773800B (en) | 2014-11-12 |
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