CN1202923C - Correcting unit for engine crank shaft deformation and correcting method - Google Patents
Correcting unit for engine crank shaft deformation and correcting method Download PDFInfo
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- CN1202923C CN1202923C CN 02144588 CN02144588A CN1202923C CN 1202923 C CN1202923 C CN 1202923C CN 02144588 CN02144588 CN 02144588 CN 02144588 A CN02144588 A CN 02144588A CN 1202923 C CN1202923 C CN 1202923C
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- correcting
- deformation
- stove
- bolt
- crooked
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- 238000000034 method Methods 0.000 title abstract description 9
- 230000032683 aging Effects 0.000 claims abstract description 7
- 230000036461 convulsion Effects 0.000 claims description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 5
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 6
- 230000035882 stress Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 230000009191 jumping Effects 0.000 abstract 1
- 238000010009 beating Methods 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Heat Treatment Of Articles (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The present invention relates to a device and a method for correcting the deformation of crank shafts of an engine. The device for correcting the deformation of crank shafts of an engine is composed of an oblique iron block, a wedge, a stopping block and a screw bolt, wherein the oblique iron block is movably connected with the wedge, the wedge is connected with the screw bolt in a screw connection mode, and the stopping block is arranged on the screw bolt. The method for correcting the deformation of the crank shafts of an engine comprises the following steps: checking the runout of a middle main journal of an engine crankshaft and the position of bending low point; supporting two sets of correcting devices respectively on the position of the symmetrical bending low point; adjusting the screw bolt of the correcting device; adjusting the supporting reverse deformation quantity of the correcting device to correspond to the bending runout; adjusting the same reverse deformation quantity of the other correcting device on the basis of the before step; treating the corrected crankshaft within 24 hours in a furnace in an aging treatment mode; correcting the deviation crankshaft whose bending running is smaller than 0.5mm. The bending running of the corrected crankshaft is qualified, the corrected crankshaft does not have microscopic cracks by checking, and residual stress is eliminated well. In addition, the metallographic structure is well and reliable, and the key technology for correcting the deviation bending jumping of the crankshaft is solved.
Description
(1) technical field:
The present invention relates to the means for correcting and the straightening by heat treatment method of engine crankshaft distortion.
(2) background technology:
Behind engine crankshaft via nitride or the impewdance matching, some (about 15～20%) bending is beated overproof, and this is a very crucial technical barrier during bent axle is made.The bending overproof aligning method commonly used of beating is: support two ends with the V-type channel,, be pressed in position intermediate with pressure with axial height point up, increase pressure gradually, up to the generation plastic deformation, jerk value is reduced, reach qualified purpose.With 42CrMo steel (HRc28～33) is example, at normal temperatures yield limit σ
s≈ 700MPa, stress measurement shows to have only when bent axle is bent to the 7mm left and right sides down, could produce the amount of recovery of beating, and at this moment surface stress reaches σ=0.21MPa * 7616=1599MPa, this stress can make the cementation zone cracking and form tired source.If beat and be 0.21mm when bent axle, exerting pressure during alignment and making anti-deformation is 10mm, and jerk value is reverse 0.06mm after the alignment.It is qualified to proofread and correct though beat, and turns the neck Zone R on inspection and finds, the surface is existing with undiscovered place of fluorescent magnetic particle flaw detection or many places crackle, about deeply 0.2mm.The crackle characteristics are: bold and discontinuous, and transgranular fracture.Therefore, this aligning method should adopt on bent axle anything but.
(3) summary of the invention:
The present invention solves the after heat treatment crooked overproof problem of beating of engine crankshaft effectively.
Technical scheme of the present invention is: the means for correcting of engine crankshaft distortion, be made of wedge, chock, link stopper and bolt, two wedge inclined-planes are relative, and wedge inclined-plane and chock flexibly connect, the chock center has screw to be connected with bolt thread, near nut overcoat the rectangle link stopper is housed on bolt.
The bearing calibration of engine crankshaft distortion:
The first step: jerk value and the crooked low dot location of checking the middle trunnion of engine crankshaft;
Second step: two cover means for correctings are supported on symmetrical crooked low spot place respectively, measuring instrument is housed on the trunnion between the means for correcting;
The 3rd step: adjust the bolt of one of them means for correcting, observe the jerk value of axle journal in the measuring instrument, make the support anti-deformation suitable with crooked jerk value; Adjust the bolt of another means for correcting again, on the basis of adjusting anti-deformation last time, increase identical anti-deformation again;
The 4th step: Ageing Treatment is carried out in the shove charge in 24 hours of the bent axle after the correction; Crooked jerk value after the bent axle heat treatment and means for correcting support anti-deformation following corresponding relation:
Crooked jerk value/mm 0.10 0.15 0.20 0.30 0.40 0.50
Support anti-deformation/mm 0.12 0.15 0.18 0.25 0.31 0.38.
Nitrated steel axle timeliness heating-up temperature is 500～520 ℃, is incubated 4 hours, and stove is chilled to temperature and is lower than 200 ℃ and comes out of the stove.Pull down means for correcting after coming out of the stove.
Nitrogenize magnesium iron axle timeliness heating-up temperature is 540～560 ℃, is incubated 4 hours, and stove is chilled to temperature and is lower than 200 ℃ and comes out of the stove.Pull down means for correcting after coming out of the stove.
Impewdance matching steel axle timeliness heating-up temperature is 280～300 ℃, is incubated 6 hours, and stove is chilled to temperature and is lower than 180 ℃ and comes out of the stove.Pull down means for correcting after coming out of the stove.
The invention has the beneficial effects as follows: the I of its regulated quantity reaches 0.005 millimeter in application process, can guarantee the accurate control of anti-deformation in the support process fully.Be used for deflection of crankshaft and beat, proofread and correct less than the overproof bent axle of 0.5mm.Ageing Treatment is carried out in the shove charge in 24 hours of bent axle after the correction, pulls down means for correcting after coming out of the stove, and checks and does not find microfissure, and the residual stress in the trimming process is eliminated good.Through the bent axle that this device is handled, bending is beated qualified, can not produce microfissure, metallographic structure is also good reliable, thereby has solved the beat key technology of overproof correction of deflection of crankshaft.
(4) description of drawings:
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 uses schematic diagram for the present invention.
(5) specific embodiment:
Embodiment 1
The means for correcting of engine crankshaft distortion and bearing calibration are as illustrated in fig. 1 and 2, the means for correcting of engine crankshaft distortion, constitute by wedge, chock, link stopper and bolt, two wedge inclined-planes are relative, wedge 1 inclined-plane and chock 2 flexibly connect, the chock center has screw and bolt 4 to be threaded, and near nut overcoat rectangle link stopper 3 is housed on bolt.
The bearing calibration of engine crankshaft distortion: with six cylinder engine nitrated steel bent axle is example, as shown in Figure 3.
The first step: the position of checking out the jerk value and the crooked low spot of four main neck.
Second goes on foot: 3, the 4 crooked low spot places of turning shown in two cover means for correctings are supported on respectively.
The 3rd step: adjust the bolt of one of them means for correcting, observe the jerk value of four main neck, make support anti-deformation (h) and crooked jerk value (△) suitable.Adjust another means for correcting bolt again, on the basis of adjusting anti-deformation last time, increase identical anti-deformation again.As to measure the crooked jerk value of four main neck be 0.20mm, at first adjusts 3 and turn low spot place means for correcting bolt, makes to support anti-deformation (h) and be 0.18mm.Adjust 4 again and turn low spot place means for correcting bolt, turn on the basis of anti-deformation, increase the anti-deformation of 0.18mm again in adjustment 3.
The 4th step: Ageing Treatment is carried out in the shove charge in 24 hours of the bent axle after the correction.
Nitrated steel axle timeliness heating-up temperature is 500～520 ℃, is incubated 4 hours, and stove is chilled to temperature and is lower than 200 ℃ and comes out of the stove.Pull down means for correcting after coming out of the stove.
The bearing calibration of engine crankshaft distortion: with six cylinder engine nitrogenize spherulitic iron crankshaft is example.
The first step: the position of checking out the jerk value and the crooked low spot of four main neck.
Second step: two cover means for correctings are supported on 2, the 5 crooked low spot places of turning respectively.
The 3rd step: adjust the bolt of one of them means for correcting, observe the jerk value of four main neck, make support anti-deformation (h) and crooked jerk value (△) suitable.Adjust another means for correcting bolt again, on the basis of adjusting anti-deformation last time, increase identical anti-deformation again.As to measure the crooked jerk value of four main neck be 0.15mm, at first adjusts 2 and turn low spot place means for correcting bolt, makes to support anti-deformation (h) and be 0.15mm.Adjust 5 again and turn low spot place means for correcting bolt, turn on the basis of anti-deformation, increase the anti-deformation of 0.15mm again in adjustment 2.
The 4th step: Ageing Treatment is carried out in the shove charge in 24 hours of the bent axle after the correction.
Nitrogenize magnesium iron axle timeliness heating-up temperature is 540～560 ℃, is incubated 4 hours, and stove is chilled to temperature and is lower than 200 ℃ and comes out of the stove.Pull down means for correcting after coming out of the stove.
The bearing calibration of engine crankshaft distortion: with four cylinder engine impewdance matching steel crank shaft is example.
The first step: the position of checking out the jerk value and the crooked low spot of the 3rd trunnion.
Second step: two cover means for correctings are supported on 2, the 3 crooked low spot places of turning respectively.
The 3rd step: adjust the bolt of one of them means for correcting, observe the jerk value of the 3rd trunnion, make support anti-deformation (h) and crooked jerk value (△) suitable.Adjust another means for correcting bolt again, on the basis of adjusting anti-deformation last time, increase identical anti-deformation again.As to measure the crooked jerk value of the 3rd trunnion be 0.40mm, at first adjusts 3 and turn low spot place means for correcting bolt, makes to support anti-deformation (h) and be 0.31mm.Adjust 2 again and turn low spot place means for correcting bolt, turn on the basis of anti-deformation, increase the anti-deformation of 0.31mm again in adjustment 3.
The 4th step: Ageing Treatment is carried out in the shove charge in 24 hours of the bent axle after the correction.
Impewdance matching steel axle timeliness heating-up temperature is 280～300 ℃, is incubated 6 hours, and stove is chilled to temperature and is lower than 180 ℃ and comes out of the stove.Pull down means for correcting after coming out of the stove.
Crooked jerk value (△) after the bent axle heat treatment supports anti-deformation (h) with means for correcting following corresponding relation:
Crooked jerk value/mm 0.10 0.15 0.20 0.30 0.40 0.50
Support anti-deformation/mm 0.12 0.15 0.18 0.25 0.31 0.38.
Claims (5)
1, the means for correcting of engine crankshaft distortion, constitute by wedge, chock, link stopper and bolt, it is characterized in that: two wedge inclined-planes are relative, wedge [1] inclined-plane and chock [2] flexibly connect, the chock center has screw and bolt [4] to be threaded, and near nut overcoat rectangle link stopper [3] is housed on bolt.
2, the bearing calibration of engine crankshaft distortion is characterized in that:
The first step: jerk value and the crooked low dot location of checking the middle trunnion of engine crankshaft;
Second step: two cover means for correctings are supported on symmetrical crooked low spot place respectively, measuring instrument is housed on the trunnion between the means for correcting;
The 3rd step: adjust the bolt of one of them means for correcting, observe the jerk value of axle journal in the measuring instrument, make the support anti-deformation suitable with crooked jerk value; Adjust the bolt of another means for correcting again, on the basis of adjusting anti-deformation last time, increase identical anti-deformation again;
The 4th step: Ageing Treatment is carried out in the shove charge in 24 hours of the bent axle after the correction; Crooked jerk value after the bent axle heat treatment and means for correcting support anti-deformation following corresponding relation:
Crooked jerk value/mm 0.10 0.15 0.20 0.30 0.40 0.50
Support anti-deformation/mm 0.12 0.15 0.18 0.25 0.31 0.38.
3, the bearing calibration of engine crankshaft according to claim 2 distortion, it is characterized in that: nitrated steel axle timeliness heating-up temperature is 500～520 ℃, is incubated 4 hours, stove is chilled to temperature and is lower than 200 ℃ and comes out of the stove, and pulls down means for correcting after coming out of the stove.
4, the bearing calibration of engine crankshaft according to claim 2 distortion, it is characterized in that: nitrogenize magnesium iron axle timeliness heating-up temperature is 540～560 ℃, is incubated 4 hours, stove is chilled to temperature and is lower than 200 ℃ and comes out of the stove, and pulls down means for correcting after coming out of the stove.
5, the bearing calibration of engine crankshaft according to claim 2 distortion, it is characterized in that: impewdance matching steel axle timeliness heating-up temperature is 280～300 ℃, is incubated 6 hours, stove is chilled to temperature and is lower than 180 ℃ and comes out of the stove, and pulls down means for correcting after coming out of the stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02144588 CN1202923C (en) | 2002-11-08 | 2002-11-08 | Correcting unit for engine crank shaft deformation and correcting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02144588 CN1202923C (en) | 2002-11-08 | 2002-11-08 | Correcting unit for engine crank shaft deformation and correcting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1410181A CN1410181A (en) | 2003-04-16 |
| CN1202923C true CN1202923C (en) | 2005-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02144588 Expired - Lifetime CN1202923C (en) | 2002-11-08 | 2002-11-08 | Correcting unit for engine crank shaft deformation and correcting method |
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| Country | Link |
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| CN (1) | CN1202923C (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100588476C (en) * | 2006-12-25 | 2010-02-10 | 西安重型机械研究所 | Tension mechanism for profiled bar pressure straightening device |
| CN102198457B (en) * | 2010-03-26 | 2013-06-05 | 广西玉柴机器股份有限公司 | Method and tool for straightening bending deformation of crankshaft |
| CN101934308B (en) * | 2010-08-20 | 2012-06-13 | 浙江大学 | Method and device for straightening multi-scale bending guide rail |
| DE102010056616A1 (en) * | 2010-12-23 | 2012-06-28 | Hegenscheidt-Mfd Gmbh & Co. Kg | Method for straightening crankshafts |
| CN102384819A (en) * | 2011-11-10 | 2012-03-21 | 上海辛克试验机有限公司 | Device and method for correcting dynamic balance of crankshaft |
| CN103128136A (en) * | 2011-11-29 | 2013-06-05 | 哈尔滨东安汽车动力股份有限公司 | Method of eliminating bending deflection of tufftriding forged steel crank shaft |
| CN104046766B (en) * | 2013-03-14 | 2016-04-13 | 广西玉柴机器股份有限公司 | Six cylinder machine crankshaft normalizing shove charge methods |
| CN103191961B (en) * | 2013-05-02 | 2015-08-26 | 南车戚墅堰机车有限公司 | Aligning method is knocked after a kind of Steel Crankshafts nitrogenize distortion |
| CN104438479A (en) * | 2014-10-28 | 2015-03-25 | 南车戚墅堰机车有限公司 | Method for correcting and adjusting deformation of locomotive crankshaft |
| CN106525309A (en) * | 2016-10-11 | 2017-03-22 | 桂林电子科技大学 | Detection method of detecting corresponding relation between residual stress and crankshaft deformation |
| CN107088595B (en) * | 2017-06-01 | 2018-08-31 | 上海理工大学 | A kind of bent axle pressure straightening device and method of integrated axle journal roundness measurement |
| CN110052512B (en) * | 2018-01-18 | 2020-09-22 | 辽宁五一八内燃机配件有限公司 | Upsetting crankshaft straightening device and method |
| CN110293153B (en) * | 2019-05-30 | 2020-06-09 | 荆州环球汽车零部件制造有限公司 | Accurate straightening method for keeping appearance color consistency after crankshaft ion nitriding |
| CN113477750B (en) * | 2021-05-31 | 2023-04-14 | 广州文冲船舶修造有限公司 | Method for repairing bending deformation of marine stern shaft |
-
2002
- 2002-11-08 CN CN 02144588 patent/CN1202923C/en not_active Expired - Lifetime
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| CN1410181A (en) | 2003-04-16 |
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Owner name: FAW DEUTZ (DALIAN) ENGINE CO., LTD. Free format text: FORMER OWNER: FAW AUTO GROUP CO.LTD. DALIAN DIESEL ENGINE BRANCH CO.LTD. Effective date: 20080307 |
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Owner name: FAW AUTO GROUP CO.LTD. DALIAN DIESEL ENGINE BRANCH Free format text: FORMER NAME OR ADDRESS: CHINA FIRST AUTOMOBILE GROUP DALIAN DIESEL ENGINE FACTORY |
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Address after: No. 49, Northeast Road, Shahekou District, Liaoning, Dalian Patentee after: FAW Jiefang Automobile Co., Ltd. Dalian diesel engine branch Co. Address before: No. 49, Dongbei Road, Dalian, Liaoning, Shahekou Patentee before: DALIAN DIESEL ENGINE PLANT CHI |
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Effective date of registration: 20080307 Address after: No. 117 middle the Yellow Sea Road, Dalian economic and Technological Development Zone Patentee after: DEUTZ (DALIAN) ENGINE CO.,LTD. Address before: No. 49, Northeast Road, Shahekou District, Liaoning, Dalian Patentee before: FAW Jiefang Automobile Co., Ltd. Dalian diesel engine branch Co. |
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Address after: 116600 No. 117 Huanghai Middle Road, Dalian Economic and Technological Development Zone, Liaoning Province Patentee after: FAW Jiefang Dalian Diesel Engine Co.,Ltd. Address before: No. 117 Huanghai Middle Road, Dalian Economic and Technological Development Zone Patentee before: DEUTZ (DALIAN) ENGINE CO.,LTD. |
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Granted publication date: 20050525 |