CN102773800B - 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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- CN102773800B CN102773800B CN201210291015.9A CN201210291015A CN102773800B CN 102773800 B CN102773800 B CN 102773800B CN 201210291015 A CN201210291015 A CN 201210291015A CN 102773800 B CN102773800 B CN 102773800B
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- connecting rod
- center
- neck
- trunnion
- rod neck
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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 machining class, specifically 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 circularity precision, generally first on lathe, to process an exemplar, exemplar is taken to the deviation from circular from of measuring each connecting rod neck on special-purpose roundness measuring instrument, again the roundness error of measuring is worth by way of compensation and is input on machining tool, to revise the movement locus of emery wheel, thus the circularity precision of raising workpiece crank-shaft link neck.But generally, follow grinding connecting rod neck is with location, two ends, with the center rest support on trunnion, processes, because the trunnion between each workpiece and exemplar (center rest support shelves) circularity is big or small and deformation direction is all different, and the trunnion of different circularity has different swinging tracks under the clamping of centre frame, when the trunnion circularity size direction difference of exemplar and workpiece is larger, the deviation from circular from of workpiece is also larger like this.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, a kind of method of circularity precision of the follow grinding that improves crank-shaft link neck is provided, the method can avoid the trunnion deviation from circular from of exemplar and workpiece to affect the circularity precision of workpiece follow grinding.
Technical scheme of the present invention is as follows:
A kind of method that improves the follow grinding circularity precision of crank-shaft link neck, it is characterized in that: by measuring the deviation from circular from of the center rest support trunnion after exemplar processing, the trunnion forming due to trunnion deviation from circular from while obtaining crankshaft rotating is with respect to the movement locus of centre frame, according to relative centre frame center, trunnion center trochotron, 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 while being zero of the oscillating quantity that each connecting rod roundness error amount on exemplar is deducted to each connecting rod neck center calculating, in processing postorder workpiece process, adopt this processing offset compensation grinding.
The present invention also can be supported after the processing offset of trunnion deviation from circular from each connecting rod neck while being zero according to said method, measure again the supports main shaft roundness error amount of workpiece, the oscillating quantity at trunnion center when the bent axle while calculating this error amount rotates, and further calculating the oscillating quantity at machining crankshafts each connecting rod neck center of when rotation, the negative value of the processing offset of each connecting rod neck when trunnion deviation from circular from calculating is zero oscillating quantity at each connecting rod neck center during with workpiece crankshaft rotating is added and can obtains each connecting rod neck of workpiece and process offset.
The present invention is simple and convenient, scientific and reasonable, effective compensation the deviation from circular from that in Crankshaft Machining process, centre frame distortion causes.
The specific embodiment
Mono-one kinds of methods that improve the follow grinding circularity precision of crank-shaft link neck of embodiment, concrete steps are
After A, 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 center rest support trunnion;
B, calculate the trunnion that forms due to trunnion deviation from circular from respect to the movement locus of centre frame when crankshaft rotating;
C, because trunnion center swings each connecting rod neck with respect to centre frame center, also swing thereupon, according to relative centre frame center, trunnion center, swing the oscillating quantity that can calculate each connecting rod neck center;
Can the be supported processing offset of trunnion deviation from circular from each connecting rod neck while being zero of D, the oscillating quantity that each connecting rod roundness error amount on exemplar is deducted to each connecting rod neck center calculating.
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, 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 center rest support trunnion;
B, calculate the trunnion that forms due to trunnion deviation from circular from respect to the movement locus of centre frame when crankshaft rotating;
C, because trunnion center swings each connecting rod neck with respect to centre frame center, also swing thereupon, according to relative centre frame center, trunnion center, swing the oscillating quantity that can calculate each connecting rod neck center;
Can the be supported processing offset of trunnion deviation from circular from each connecting rod neck while being zero of D, the oscillating quantity that each connecting rod roundness error amount on exemplar is deducted to each connecting rod neck center calculating;
E, load onto workpiece, first measure the supports main shaft roundness error amount of workpiece, the oscillating quantity at trunnion center when the bent axle while calculating error amount rotates, and the oscillating quantity at each connecting rod neck center while further calculating machining crankshafts rotation;
When the processing offset of each connecting rod neck when F, the trunnion deviation from circular from that D step is calculated are zero and workpiece crankshaft rotating, the negative value of the oscillating quantity at each connecting rod neck center is added and can obtains each connecting rod neck processing offset of workpiece;
G, according to connecting rod neck processing offset machining crankshafts connecting rod neck.
The oscillating quantity at each connecting rod neck center of the present invention and trunnion center oscillating quantity can draw by FEM calculation, also can measure with measurement method.
Claims (2)
1. a method that improves the follow grinding circularity precision of crank-shaft link neck, it is characterized in that: by measuring the deviation from circular from of the center rest support trunnion after exemplar processing, the trunnion forming due to trunnion deviation from circular from while obtaining crankshaft rotating is with respect to the movement locus of centre frame, according to relative centre frame center, trunnion center trochotron, 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 while being zero of the oscillating quantity that each connecting rod roundness error amount on exemplar is deducted to each connecting rod neck center calculating, in processing postorder workpiece process, adopt this processing offset compensation grinding.
2. a kind of method that improves the follow grinding circularity precision of crank-shaft link neck according to claim 1, it is characterized in that: load onto workpiece, first measure the supports main shaft roundness error amount of workpiece, the oscillating quantity at trunnion center when bent axle while calculating error amount rotates, and the oscillating quantity at each connecting rod neck center while further calculating machining crankshafts rotation; When the processing offset of each connecting rod neck when trunnion deviation from circular from calculating is zero and workpiece crankshaft rotating, the negative value of the oscillating quantity at each connecting rod neck center is added and can obtains each connecting rod neck processing offset of workpiece.
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 CN102773800A (en) | 2012-11-14 |
| CN102773800B true CN102773800B (en) | 2014-11-12 |
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| 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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Families Citing this family (4)
| 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 |
| CN108763803B (en) * | 2018-06-04 | 2021-09-10 | 东华大学 | Grinding machine analysis method based on crankshaft connecting rod neck follow-up grinding profile error decomposition |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN102773800A (en) | 2012-11-14 |
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