CN101658997B - Method for repairing and processing bearing hole of main bearing cap of diesel engine body of diesel locomotive - Google Patents

Method for repairing and processing bearing hole of main bearing cap of diesel engine body of diesel locomotive Download PDF

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Publication number
CN101658997B
CN101658997B CN 200810150764 CN200810150764A CN101658997B CN 101658997 B CN101658997 B CN 101658997B CN 200810150764 CN200810150764 CN 200810150764 CN 200810150764 A CN200810150764 A CN 200810150764A CN 101658997 B CN101658997 B CN 101658997B
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main
main bearing
beating cap
processing
main beating
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CN 200810150764
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Chinese (zh)
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CN101658997A (en
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徐世武
马玉临
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兰州金牛轨道交通装备有限责任公司
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Abstract

The invention discloses a method for repairing and processing a main bearing cap of a diesel engine body of a diesel locomotive, which comprises a method for realizing the repairing and processing of a bearing hole of an original main bearing cap of a diesel engine body by a common boring mill and a repairing and processing method which uses a semi-manufactured main bearing cap to replace the bearing hole of the original main bearing cap. When the method is applied to the repairing and processing operation of the diesel locomotive, the diesel engine body and the main bearing cap are separated, the bearing hole of the main bearing cap is separately processed by means of accurate measurement and reasonable processing technology, the processing of the bearing hole is completed by the common boring mill instead of large-scale equipment, so the current situation that the main bearing cap can be processed by large-scale equipment only after being assembled with the engine body in the past is changed, the quality of repairing and processing is improved fundamentally, the work efficiency is high, the cost is low and the scope of application is wide, thereby realizing the purpose of repairing the main bearing hole of the large-scale engine body by the common machine tool. The invention has the repairing cost which is only 3 percent of the processing cost of the large-scale machine tool, thereby having considerable economic benefit.

Description

The method of bearing hole of main bearing cap of diesel engine body of diesel locomotive maintenance processing
Technical field
The invention belongs to a kind of method of Railway Diesel Locomotive Engine body bearing hole of main bearing cap maintenance processing.
Background technology
Diesel engine body of diesel locomotive is in overhaul, because the body main beating cap deforms in diesel engine uses, scaling loss, or because of inappropriate repair method, causes housing main bearing dead eye axiality and aperture to transfinite, the main bearing hole surface accuracy is destroyed, and forms defective.Usually, diesel engine body of diesel locomotive main bearing hole axiality requires that very high (according to diesel locomotive overhaul rules and customer requirements, each grade main bearing hole is with respect to the deviation of 1,9 main bearing hole common axis, total length φ 0.10mm is adjacent φ 0.06mm), existing repair method is to use the semi-finished product main beating cap instead, adopts the large-scale precision boring machine that housing main bearing dead eye is carried out secondary operations, recover its axiality, aperture and surface roughness, this repair method cost is high, and the production cycle is long, and repair cost is up to more than tens thousand of units; Another kind of mode is that repair shop saves cost, take the method for Brush Plating, filing, grinding that housing main bearing dead eye is placed under repair, this repair method labour intensity is large, production cycle is long, yield rate is low, and maintenance person's operating technology is had relatively high expectations, and labour intensity is large, repair quality is difficult to guarantee that the quality accident that causes therefrom is more.
Summary of the invention
In view of the deficiency of existing bearing hole of main bearing cap of diesel engine body of diesel locomotive maintenance processing, purpose of the present invention aims to provide a kind of method of diesel engine body of diesel locomotive main beating cap dead eye maintenance processing.Described maintenance processing comprises following two kinds of methods.
Method 1, employing common boring machine are realized the maintenance processing method to diesel-engine body first wife main beating cap dead eye: the steps include:
A. two groups of defective main beating cap of main bearing hole (2,3) are stood up on 1 grade of platform, relative in twos, consist of a complete cylindrical hole, with two fastening bolts (1) that it is fastening, under the A face, adjust short-axis direction diameter b "-b ", c "-c " with the clearance gauge cushioning, diameter b "-b ", c "-c " are more or less the same in 0.02mm, measure long axis direction diameter a "-a ", be designated as A1, take off fastening bolt (1);
B. main beating cap (2) is placed on the vertical knee-type milling machine, the below supports with the parallels of two double altitudes, measure and adjust B horizonally split face with respect to the perpendicularity of machine tool chief axis in the 0.02mm scope, be installed fastening after, with this flush cut 0.20mm;
C. by above-mentioned b same procedure another being organized main beating cap (3) B face processes;
D. two groups of main beating cap of aforementioned b, c (2,3) are re-assemblied by step a, spot welding connects the minor surface of two groups of main beating cap;
Two groups of main beating cap (2,3) that e. will connect place on the boring machine, and symmetrical centering makes machine tool chief axis concentric with the geometric center in hole; Move up and down machine tool chief axis, measure with dial gauge along a-a, b-b direction respectively and adjust main bearing hole axial runout amount in the 0.015mm scope, the fastening rear repetition measurement that is installed, the machine tool chief axis centre of gyration and main bearing hole geometric center should concentric, coaxial lines, and error is not more than 0.015mm;
F. use hard alloy cutter (YT15) machining spindle to hold bore dia to given size, be designated as A2, the hole surface roughness after the processing is Ra1.6~3.2 μ m, after the processing, keeps the cutter radial invariant position;
Compare A1 and A2 value, such as A1〉A2, and A1-A2 0.03mm, then along a "-a " direction mobile machine tool workbench, side-play amount is (A1-A2) ÷ 2, in the constant situation of the cutter radial amount of feeding, carry out secondary operations, complete after, mobile machine tool workbench in the other direction, side-play amount is (A1-A2), cutter radial is processed for the third time without feeding, measures after the processing, and the A2 value should equate (franchise 0.03mm) with the A1 value;
G. dismantle main beating cap;
H. grind body main bearing seat dead eye with special-purpose technical dummy spindle, make its axiality and surface state return to the requirement of regulation;
J. the main beating cap that processes is packed in the body main bearing seat by original position successively, fastening Main bearing bolt is measured housing main bearing dead eye axiality and aperture, according to measurement data, trace is adjusted the relative position of main beating cap and bearing block, recovers housing main bearing dead eye axiality and aperture;
K. the housing main bearing dead eye maintenance is complete.
The method of method 2, a kind of maintenance processing with replacing first wife's main beating cap dead eye after the processing of semi-finished product main beating cap, the beanstalk step is:
A. at first original main beating cap is assembled by method 1 step a method, measure the also rear dismounting of record A1 value;
B. match width dimensions and support and open the semi-finished product that grade size conforms to and mount cover in the support, both are not more than 0.02mm at fit clearance, measure b '-b ', c '-c ' orient diameter size value, and are recorded as B3, C3;
C. two semi-finished product lid is assembled by above-mentioned steps a;
D. press method 1 steps d at the enterprising luggage card of boring machine, centering and fixation workpiece again, compare B3, C3 value, such as B3<C3, then lathe moves to A face one lateral deviation, otherwise then to the opposite side skew, side-play amount is calculated as follows:
O-O′=(B3-C3)÷2;
E. process, assemble, adjust by method 1 step e~j.
Advantage of the present invention is:
The present invention is in the repairing I. C. locomotive operation, and diesel-engine body separates with main beating cap, relies on to measure accurately and rational processing technology, and machining spindle holds and covers dead eye separately, and dead eye processing is finished with common boring machine, does not rely on main equipment.Process body after the processing by the present invention, the force part that it is main---main beating cap partly need not pincers worker and does any finishing, the inspection operation personnel only suitably grind main bearing seat and get final product, operating procedure is simple, changed in the past main beating cap must with the body assembling after, the present situation that relies on main equipment to process, compare with manual the repairing, repair quality has had the improvement of essence, high efficiency, cost is low, and is applied widely, thereby realized that machine tool keeps in repair the target of large-scale housing main bearing dead eye.Its cost of overhaul only is 3% of heavy duty machine tools processing, and economic benefit is inestimable.
Maintenance processing method of the present invention has been repaired the 16V280ZJA diesel engine C7-210# body of Lanzhou Taurus track Co., Ltd of Chinese northern car group (former Lanzhou locomotive works), this body is because of the 6th, 7 grade of main beating cap scaling loss, employing is changed the method for lid processing semi-finished product main beating cap and is repaired, simultaneously many 16V240ZJB diesel engine bodies are changed lid repairing and the repairing of main beating cap Boring, now entrucking is used so far, and effect is fine.
Description of drawings
Fig. 1 is body main beating cap machining sketch chart of the present invention.
Fig. 2 is main beating cap horizonally split face machining sketch chart of the present invention.
Fig. 3 is that semi-finished product main beating cap of the present invention is pre-installed schematic diagram at body.
Fig. 4 is semi-finished product main beating cap machining sketch chart of the present invention.
The specific embodiment
In the bearing hole of main bearing cap of diesel engine body of diesel locomotive maintenance processing operation, be that diesel-engine body is separated with main beating cap, rely on and measure accurately and rational processing technology that machining spindle holds and covers dead eye separately, dead eye processing is finished with common boring machine, does not rely on main equipment.Following two kinds of methods maintenance processing bearing hole of main bearing cap of diesel engine body of diesel locomotive embodiment that comprise:
Embodiment 1
Method 1: to the processing of diesel engine frame first wife main beating cap dead eye:
As shown in Figure 1, on 1 grade of platform, take main beating cap 2 one homonymies (such as the left side) as benchmark, two groups of defective main beating cap of main bearing hole (2,3) are stood up, relative in twos, consist of a complete cylindrical hole, with two fastening bolts (1) that it is fastening, under the A face, adjust short-axis direction diameter b "-b ", c "-c " with the clearance gauge cushioning, diameter b "-b ", c "-c " are more or less the same in 0.02mm, measure long axis direction diameter a "-a ", be designated as A1, take off fastening bolt (1); Measure the major and minor axis diameter in the hole that forms after two main beating cap (2,3) are assembled in twos relatively; Main beating cap 2 (such as Fig. 2) is placed on the vertical knee-type milling machine, and the below supports with the parallels of two double altitudes, and two main beating cap are relative in twos, reformulates a cylindrical hole; Measure and also to adjust B horizonally split face with respect to the perpendicularity of machine tool chief axis, guarantee in the 0.02mm scope, be installed fastening after, with main beating cap horizonally split face cutting 0.20mm.By same procedure another group main beating cap 3B face is processed; Aforementioned two groups of main beating cap (2,3) are re-assemblied by step a, and for preventing misplacing in the handling process, spot welding connects the minor surface of two groups of main beating cap; The two groups of main beating cap (2,3) that connect are placed on the boring machine, and symmetrical alignment holes makes machine tool chief axis concentric with the geometric center of bore hole; Move up and down machine tool chief axis, measure with dial gauge along a-a, b-b direction respectively and adjust main bearing hole axial runout amount in the 0.015mm scope, the fastening rear repetition measurement that is installed, the machine tool chief axis centre of gyration and main bearing hole geometric center should concentric, coaxial lines, and error is not more than 0.015mm.(240 serial bodies are φ 235 to given size to hold bore dia with hard alloy cutter (YT15) machining spindle + 0.06Mm, 280 serial bodies are φ 245 + 0.06Mm), be designated as A2, the hole surface roughness after the processing is Ra1.6~3.2 μ m, after the processing, keeps the cutter radial invariant position.
Compare A1 and A2 value, such as A1〉A2, and A1-A2 0.03mm, then along a "-a " direction mobile machine tool workbench, side-play amount is (A1-A2) ÷ 2, in the constant situation of the cutter radial amount of feeding, carry out secondary operations, complete after, mobile machine tool workbench in the other direction, side-play amount is (A1-A2), cutter radial is processed for the third time without feeding, measures after the processing, and the A2 value should equate (franchise 0.03mm) with the A1 value.
Conform to before making its major axis dimension and processing, minor axis dimension is identical with the arc radius of main bearing hole regulation.Conform to before making its major axis dimension and processing, minor axis dimension is identical with the arc radius of main bearing hole regulation.
The center of symmetrical alignment holes on common boring machine, the diameter dimension that bore hole requires to housing main bearing dead eye.Change workpiece and machine tool chief axis relative position, this hole is revised by the front state processing of processing, processing rear min bearing lid and main bearing seat assemble by original position, by the trace adjustment to both relative positions, recover housing main bearing dead eye axiality and aperture.The dismounting main beating cap.Grind body main bearing seat dead eye with the technical dummy spindle of special use, make its axiality and surface state return to the requirement of regulation; The main beating cap that processes is packed in the body main bearing seat by original position successively, fastening Main bearing bolt is measured housing main bearing dead eye axiality and aperture, according to measurement data, trace is adjusted the relative position of main beating cap and seat, recovers housing main bearing dead eye axiality and aperture; The housing main bearing dead eye maintenance is complete.
Embodiment 2
Method 2: replace first wife's main beating cap after using the processing of semi-finished product main beating cap instead.
Original main beating cap by the assembling of method 1 step a method, is measured and the rear dismounting of record A1 value; Be that the semi-finished product main beating cap is pre-installed at body, measure the eccentric throw of semi-finished product main beating cap dead eye and support dead eye, two main beating cap are assembled; At the enterprising luggage card of boring machine, centering and fixation workpiece, compare B3, C3 value by method 1 steps d, such as B3<C3, then lathe moves to A face one lateral deviation, otherwise then to opposite side skew (such as Fig. 4), side-play amount is calculated as follows;
O-O′=(B3-C3)÷2
Machine tool chief axis center and semi-finished product main beating cap dead eye center are by the eccentric throw skew that records in advance, and described method is processed and assembled according to claim 2, recovers housing main bearing dead eye axiality and aperture.1 step e~j processes, assembles, adjusts by method.

Claims (2)

1. one kind is adopted common boring machine to realize the method for the maintenance processing of diesel-engine body first wife main beating cap dead eye be the steps include:
A. two groups of defective main beating cap of main bearing hole (2,3) are stood up on 1 grade of platform, relative in twos, consist of a complete cylindrical hole, with two fastening bolts (1) that it is fastening, under datum level (A), adjust two short-axis direction diameters (b " b ", c " c ") with the clearance gauge cushioning, two diameters (b " b ", c " c ") are more or less the same in 0.02mm, measure long axis direction diameter (a " a "), be designated as A1, take off fastening bolt (1);
B. main beating cap (2) is placed on the vertical knee-type milling machine, the below supports with the parallels of two double altitudes, measure and adjust horizonally split face (B) with respect to the perpendicularity of machine tool chief axis in the 0.02mm scope, be installed fastening after, with this flush cut 0.20mm;
C. by above-mentioned steps b another being organized main beating cap (3) horizonally split face (B) processes;
D. aforementioned two groups of main beating cap (2,3) are re-assemblied by step a, spot welding connects the minor surface of two groups of main beating cap;
Two groups of main beating cap (2,3) that e. will connect place on the boring machine, and symmetrical centering makes machine tool chief axis concentric with the geometric center in hole; Move up and down machine tool chief axis, measure with dial gauge along direction (a-a, b-b) respectively and adjust main bearing hole axial runout amount in the 0.015mm scope, the fastening rear repetition measurement that is installed, the machine tool chief axis centre of gyration and main bearing hole geometric center should concentric, coaxial lines, and error is not more than 0.015mm;
F. hold bore dia to given size with the hard alloy cutter machining spindle, be designated as A2, the hole surface roughness after the processing is Ra1.6~3.2 μ m, after the processing, keeps the cutter radial invariant position;
Compare A1 and A2 value, A1>A2, and A1-A2>0.03mm, then along long axis direction (a " a ") mobile machine tool workbench, side-play amount is (A1-A2) ÷ 2, carries out secondary operations in the constant situation of the cutter radial amount of feeding, complete after, opposite direction mobile machine tool workbench, side-play amount is A1-A2, and cutter radial is processed for the third time without feeding, measures after the processing, the A2 value should equate franchise 0.03mm with the A1 value;
G. dismantle main beating cap;
H. grind body main bearing seat dead eye with special-purpose technical dummy spindle, make its axiality and surface state return to the requirement of regulation;
J. the main beating cap that processes is packed in the body main bearing seat by original position successively, fastening Main bearing bolt is measured housing main bearing dead eye axiality and aperture, according to measurement data, trace is adjusted the relative position of main beating cap and bearing block, recovers housing main bearing dead eye axiality and aperture;
K. the housing main bearing dead eye maintenance is complete.
2. a maintenance processing method according to claim 1 realizes the method for the maintenance processing of semi-finished product main beating cap dead eye is wherein processed rear first wife's main beating cap of replacing in the claim 1 with the semi-finished product main beating cap, the steps include:
A. at first original main beating cap is assembled by claim 1 step a method, measure the also rear dismounting of record A1 value;
B. match width dimensions and support and open the semi-finished product that grade size conforms to and mount cover in the support, both are not more than 0.02mm at fit clearance, measure two orient diameters (b '-b ', c '-c ') size value, and are recorded as B3, C3;
C. two semi-finished product lid is assembled by the claims 1 step a;
D. press again claim 1 steps d at the enterprising luggage card of boring machine, centering and fixation workpiece, compare B3, C3 value, B3<C3, then lathe moves to A face one lateral deviation, on the contrary then to the opposite side skew, side-play amount is calculated as follows:
O-O′=(B3-C3)÷2;
E. process, assemble, adjust by claim 1 steps d~j.
CN 200810150764 2008-08-26 2008-08-26 Method for repairing and processing bearing hole of main bearing cap of diesel engine body of diesel locomotive CN101658997B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102248361B (en) * 2011-05-09 2013-04-17 南车戚墅堰机车有限公司 Process method for controlling concentricity error of engine body
CN102284874A (en) * 2011-08-16 2011-12-21 沪东重机有限公司 Auxiliary processing tool for bearing cover of marine diesel
CN103433685B (en) * 2013-09-16 2015-09-30 南车戚墅堰机车有限公司 The insetting sleeve repair method of diesel-engine body cam hole
CN105345389A (en) * 2015-12-24 2016-02-24 沃德传动(天津)股份有限公司 Method for repairing damaged bearing block
CN106089469B (en) * 2016-08-04 2018-11-27 广西玉柴机器股份有限公司 Tunnel type cylinder block
CN107350713B (en) * 2017-05-25 2018-12-07 陕西陕煤韩城矿业有限公司 Box body of speed reducer bearing hole technology for repairing wear
CN109175893A (en) * 2018-08-30 2019-01-11 陕西柴油机重工有限公司 Diesel engine main beating cap duplicating process method
CN109604676B (en) * 2018-12-04 2020-07-24 中车戚墅堰机车有限公司 Independent processing method for repairing machine body pairing main bearing cap
CN110614389B (en) * 2019-10-21 2021-01-22 大连船用柴油机有限公司 Boring processing method for crosshead bearing cover of large-scale low-speed marine diesel engine
CN111571113B (en) * 2020-05-28 2021-05-18 三一重机有限公司 Bearing bush seat repairing method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2307650Y (en) * 1997-09-29 1999-02-17 贺祥生 Special boring mill for processing engine cylinder head camshaft dead eye
CN2484145Y (en) * 2001-06-25 2002-04-03 吴金萍 Housing main bearing dead eye processing device
CN201104201Y (en) * 2007-10-10 2008-08-20 中国北车集团北京二七机车厂有限责任公司 Checking tool for center position degree of machine fret

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2307650Y (en) * 1997-09-29 1999-02-17 贺祥生 Special boring mill for processing engine cylinder head camshaft dead eye
CN2484145Y (en) * 2001-06-25 2002-04-03 吴金萍 Housing main bearing dead eye processing device
CN201104201Y (en) * 2007-10-10 2008-08-20 中国北车集团北京二七机车厂有限责任公司 Checking tool for center position degree of machine fret

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