CN104384874A - Processing process of automobile engine crank shaft - Google Patents
Processing process of automobile engine crank shaft Download PDFInfo
- Publication number
- CN104384874A CN104384874A CN201410501768.7A CN201410501768A CN104384874A CN 104384874 A CN104384874 A CN 104384874A CN 201410501768 A CN201410501768 A CN 201410501768A CN 104384874 A CN104384874 A CN 104384874A
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- Prior art keywords
- connecting rod
- neck
- rolling
- processing
- automobile engine
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/07—Crankshafts
Abstract
The invention provides a processing process of an automobile engine crank shaft. The process comprises the following processing steps of (1) blank forging; (2) coarse tuning: coarse turning of a main shaft neck and a connecting rod neck is carried out; (3) coarse drilling: coarse drilling of a main oil hole is carried out; (4) annealing heat treatment; (5) semi-finish turning: semi-finish turning is carried out on the main shaft neck and the connecting rod neck; (6) tempering; (7) fine turning: fine turning is carried out on the main shaft neck and the connecting neck; (8) coarse and fine grinding: coarse and fine grinding is carried out on the main shaft neck and the connecting rod neck; (9) hole drilling: coarse drilling, expanding and reaming of balance block installing holes and inclined oil holes are carried out; (10) compounding reinforcing; (11) rolling processing: each processed hole is subjected to rolling pressing processing; (12): the main shaft neck and the connecting rod neck are subjected to polishing processing; (13) anti-rust processing; (14) inspection and packaging. The process solves three problems of low rigidity intensity, poor wear resistance and good lubrication performance in the existing automobile engine crank shaft production process, so that the finally produced crank shaft has the sufficient rigidity and intensity, good impact load bearing capability and good abrasion resistance and lubrication performance.
Description
Technical field
The present invention relates to Machining Technology field, particularly a kind of processing technology of automobile engine crankshaft.
Background technology
Bent axle is the strength member in automobile engine, and it coordinates the power gas pressure acted on piston being become rotation with connecting rod, passes to the transmission mechanism on chassis, meanwhile, drives valve actuating mechanism and other servicing unit.Bent axle operationally, by gas pressure, the effect of inertia force and moment of inertia, stressed large and stressed complexity, meanwhile, bent axle is again high-speed rotary turntable, therefore, require that bent axle has enough Rigidity and strengths, there is the ability of the good load that withstands shocks, wear-resistant and lubrication is good.
The machining process more complicated of current automobile engine crankshaft, cost is higher.This invention simplifies some processes, mainly adopt roll extrusion process to replace the repeatedly grinding in each hole of original bent axle.The originally general use each hole of horizontal machine tool machining crankshafts, be easy to cause chip removal not smooth, machined surface is caused to be squeezed wound by iron filings, in order to ensure size, the form accuracy requirement in hole, dimensional uniformity requirement have to be abandoned, causing the size range change in the hole of almost every root bent axle all very greatly, can only singly join during assembling, production efficiency is low, and cost is high, the development of serious restriction enterprise.And adopt roll extrusion process can simplify operation, the processing request in each hole of bent axle can be ensured again, make bent axle have good lubricity.Crankshaft strength and the rigidity of next general plant produced are inadequate, so the present invention is from crankshaft material and heat treatment angle, by control temperature and time, strengthen the Rigidity and strength of bent axle, make bent axle have the ability of the good load that withstands shocks.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of processing technology of automobile engine crankshaft.The stiffness and strength of the existing automobile engine crankshaft of concrete solution, wearability and good lubricity three problems.
For achieving the above object, the invention provides following technical scheme: a kind of processing technology of automobile engine crankshaft, is characterized in that, its procedure of processing is as follows:
(1) rough forging: superior alloy steel 35CrMo blank is forged, forging temperature controls at 1150 DEG C ~ 1200 DEG C;
(2) rough turn: rough turn trunnion, connecting rod neck;
(3) slightly bore: slightly bore main oil-hole;
(4) annealing heat treatment: carry out annealing heat treatment to workpiece, temperature controls at 850 DEG C ~ 900 DEG C, and the time is 5 ~ 8 minutes;
(5) half finish turnings: half finish turning trunnion and connecting rod neck;
(6) modified: to carry out modifier treatment to workpiece, modifier treatment comprises high-frequency quenching and lonneal process.Hardening heat is 800 DEG C ~ 850 DEG C, and temperature retention time is 8 ~ 12 minutes; Temperature is 540 DEG C ~ 580 DEG C temperature retention times is 1 ~ 2 hour;
(7) finish turning: finish turning trunnion and connecting rod neck;
(8) slightly refine: thick fine grinding trunnion and connecting rod neck;
(9) hole: thick brill, expansion, hinge balance weight installing hole and inclined oil hole of air;
(10) complex intensifying: except workpiece both ends of the surface, carries out intensive treatment to workpiece remaining surface;
(11) roll extrusion process: roll extrusion process is carried out to each hole of processing; Rolling amount is 0.015 ~ 0.035mm; The amount of feeding is 0.5 ~ 1.5mm/r; Rolling rotating speed is 250 ~ 500r/min; Rolling 2 times;
(12) polishing: polishing is carried out to trunnion and connecting rod neck;
(13) antirust treatment;
(14) check and pack: each parameter of examining workpieces, qualified rear packaging warehouse-in.
Preferably, in the rough forging in described step (1): superior alloy steel 35CrMo selected by blank; Control at 1150 DEG C ~ 1200 DEG C to the forging temperature of blank, concrete control is 1180 DEG C.
Preferably, the annealing heat treatment process in described step (4): carry out annealing heat treatment to workpiece, temperature controls at 850 DEG C ~ 900 DEG C, and concrete control is 880 DEG C, time remaining 7 minutes.
Preferably, the modified process in described step (6) is: carry out modifier treatment to workpiece, and modifier treatment comprises high-frequency quenching and lonneal process; Hardening heat is 800 DEG C ~ 850 DEG C, and concrete control is 830 DEG C, and temperature retention time is 10 minutes; Temperature is 540 DEG C ~ 580 DEG C, and concrete control is 560 DEG C, and temperature retention time is 1.5 hours.
Preferably, the rolling process in described step (11) is: carry out roll extrusion process to each hole of processing; Rolling amount is 0.015 ~ 0.035mm, is specially 0.020mm; The amount of feeding is 0.5 ~ 1.5mm/r, is specially 1.0mm/r; Rolling rotating speed is 250 ~ 500r/min, is specially 450r/min; Rolling 2 times.
The beneficial effect of above technical scheme is adopted to be: the processing technology of a kind of automobile engine crankshaft that the present invention produces, comprise rough forging → rough turn → thick to bore → annealing heat treatment → half finish turning → modified → finish turning → thick fine grinding → boring → complex intensifying → roll extrusion process → polishing → antirust treatment → check and pack.In rough forging in the step (1) that the present invention mentions, superior alloy steel 35CrMo selected by blank.Because 35CrMo cost is low and high-quality grade of steel is not high, the harmful elements such as S, P are few, have the features such as good metal strength, plasticity and toughness, meet very much Production of Crankshaft requirement.Control at 1150 DEG C ~ 1200 DEG C to the forging temperature of blank, concrete control is 1180 DEG C; By forging, can material be saved, and make material have certain plasticity and toughness.Annealing heat treatment process in the step (4) that the present invention mentions is: carry out annealing heat treatment to workpiece, and temperature controls at 850 DEG C ~ 900 DEG C, and concrete control is 880 DEG C, time remaining 7 minutes; Annealed process, through inspection, the hardness of workpiece is 28HRC, is convenient to follow-up machining.Modified process in the step (6) that the present invention mentions is: carry out modifier treatment to workpiece, and modifier treatment comprises high-frequency quenching and lonneal process.Hardening heat is 800 DEG C ~ 850 DEG C, and concrete control is 830 DEG C, and temperature retention time is 10 minutes; By Quenching Treatment, improve workpiece hardness, workpiece hardness is 62HRC, enhances the wearability of bent axle.Temperature is 540 DEG C ~ 580 DEG C, and concrete control is 560 DEG C, and temperature retention time is 1.5 hours; By temper, workpiece hardness is 32HRC, improves the toughness of workpiece.Rolling process in the step (11) that the present invention mentions is: carry out roll extrusion process to each hole of processing.Rolling amount is 0.015 ~ 0.035mm, is specially 0.020mm; The amount of feeding is 0.5 ~ 1.5mm/r, is specially 1.0mm/r; Rolling rotating speed is 250 ~ 500r/min, is specially 450r/min; Rolling 2 times; Roll extrusion process can simplify operation, can ensure again the processing request in each hole of bent axle, makes bent axle have good lubricity, eliminate to occur in reaming procedure because of built-up edge or iron filings get rid of smooth and cause endoporus plucking, pull phenomenon.By this technique, the bent axle of final production has enough Rigidity and strengths, has the ability of the good load that withstands shocks, wear-resistant and lubrication is good.
Detailed description of the invention
The invention provides a kind of detailed description of the invention of processing technology of automobile engine crankshaft:
A processing technology for automobile engine crankshaft, its procedure of processing is as follows:
(1) rough forging: forge superior alloy steel 35CrMo blank, forging temperature controls at 1150 DEG C ~ 1200 DEG C, and concrete control is 1180 DEG C.
(2) rough turn: rough turn trunnion, connecting rod neck.
(3) slightly bore: slightly bore main oil-hole.
(4) annealing heat treatment: carry out annealing heat treatment to workpiece, temperature controls at 850 DEG C ~ 900 DEG C, concrete control is 880 DEG C, and the time is 5 ~ 8 minutes, concrete time remaining 7 minutes.
(5) half finish turnings: half finish turning trunnion and connecting rod neck.
(6) modified: to carry out modifier treatment to workpiece, modifier treatment comprises high-frequency quenching and lonneal process.Hardening heat is 800 DEG C ~ 850 DEG C, and concrete control is 830 DEG C, and temperature retention time is 8 ~ 12 minutes, and temperature retention time is 10 minutes; Temperature is 540 DEG C ~ 580 DEG C, and concrete control is 560 DEG C, and temperature retention time is 1 ~ 2 hour, and temperature retention time is 1.5 hours.
(7) finish turning: finish turning trunnion and connecting rod neck.
(8) slightly refine: thick fine grinding trunnion and connecting rod neck.
(9) hole: thick brill, expansion, hinge balance weight installing hole and inclined oil hole of air.
(10) complex intensifying: except workpiece both ends of the surface, carries out intensive treatment to workpiece remaining surface.
(11) roll extrusion process: roll extrusion process is carried out to each hole of processing.Rolling amount is 0.015 ~ 0.035mm, is specially 0.020mm; The amount of feeding is 0.5 ~ 1.5mm/r, is specially 1.0mm/r; Rolling rotating speed is 250 ~ 500r/min, is specially 450r/min; Rolling 2 times.
(12) polishing: polishing is carried out to trunnion and connecting rod neck.
(13) antirust treatment
(14) check and pack: each parameter of examining workpieces, qualified rear packaging warehouse-in.
The beneficial effect of above technical scheme is adopted to be: the processing technology of a kind of automobile engine crankshaft that the present invention produces, comprise rough forging → rough turn → thick to bore → annealing heat treatment → half finish turning → modified → finish turning → thick fine grinding → boring → complex intensifying → roll extrusion process → polishing → antirust treatment → check and pack.In rough forging in the step (1) that the present invention mentions, superior alloy steel 35CrMo selected by blank.Because 35CrMo cost is low and high-quality grade of steel is not high, the harmful elements such as S, P are few, have the features such as good metal strength, plasticity and toughness, meet very much Production of Crankshaft requirement.Control at 1150 DEG C ~ 1200 DEG C to the forging temperature of blank, concrete control is 1180 DEG C; By forging, can material be saved, and make material have certain plasticity and toughness.Annealing heat treatment process in the step (4) that the present invention mentions is: carry out annealing heat treatment to workpiece, and temperature controls at 850 DEG C ~ 900 DEG C, and concrete control is 880 DEG C, time remaining 7 minutes; Annealed process, through inspection, the hardness of workpiece is 28HRC, is convenient to follow-up machining.Modified process in the step (6) that the present invention mentions is: carry out modifier treatment to workpiece, and modifier treatment comprises high-frequency quenching and lonneal process.Hardening heat is 800 DEG C ~ 850 DEG C, and concrete control is 830 DEG C, and temperature retention time is 10 minutes; By Quenching Treatment, improve workpiece hardness, workpiece hardness is 62HRC, enhances the wearability of bent axle.Temperature is 540 DEG C ~ 580 DEG C, and concrete control is 560 DEG C, and temperature retention time is 1.5 hours; By temper, workpiece hardness is 32HRC, improves the toughness of workpiece.Rolling process in the step (11) that the present invention mentions is: carry out roll extrusion process to each hole of processing.Rolling amount is 0.015 ~ 0.035mm, is specially 0.020mm; The amount of feeding is 0.5 ~ 1.5mm/r, is specially 1.0mm/r; Rolling rotating speed is 250 ~ 500r/min, is specially 450r/min; Rolling 2 times; Roll extrusion process can simplify operation, can ensure again the processing request in each hole of bent axle, makes bent axle have good lubricity, eliminate to occur in reaming procedure because of built-up edge or iron filings get rid of smooth and cause endoporus plucking, pull phenomenon.
By the processing technology of a kind of automobile engine crankshaft of the present invention, the bent axle of final production has enough Rigidity and strengths, has the ability of the good load that withstands shocks, wear-resistant and lubrication is good.Solve the stiffness and strength of existing automobile engine crankshaft, wearability and good lubricity three problems.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. a processing technology for automobile engine crankshaft, is characterized in that, its procedure of processing is as follows:
(1) rough forging: superior alloy steel 35CrMo blank is forged, forging temperature controls at 1150 DEG C ~ 1200 DEG C;
(2) rough turn: rough turn trunnion, connecting rod neck;
(3) slightly bore: slightly bore main oil-hole;
(4) annealing heat treatment: carry out annealing heat treatment to workpiece, temperature controls at 850 DEG C ~ 900 DEG C, and the time is 5 ~ 8 minutes;
(5) half finish turnings: half finish turning trunnion and connecting rod neck;
(6) modified: to carry out modifier treatment to workpiece, modifier treatment comprises high-frequency quenching and lonneal process.Hardening heat is 800 DEG C ~ 850 DEG C, and temperature retention time is 8 ~ 12 minutes; Temperature is 540 DEG C ~ 580 DEG C temperature retention times is 1 ~ 2 hour;
(7) finish turning: finish turning trunnion and connecting rod neck;
(8) slightly refine: thick fine grinding trunnion and connecting rod neck;
(9) hole: thick brill, expansion, hinge balance weight installing hole and inclined oil hole of air;
(10) complex intensifying: except workpiece both ends of the surface, carries out intensive treatment to workpiece remaining surface;
(11) roll extrusion process: roll extrusion process is carried out to each hole of processing; Rolling amount is 0.015 ~ 0.035mm; The amount of feeding is 0.5 ~ 1.5mm/r; Rolling rotating speed is 250 ~ 500r/min; Rolling 2 times;
(12) polishing: polishing is carried out to trunnion and connecting rod neck;
(13) antirust treatment;
(14) check and pack: each parameter of examining workpieces, qualified rear packaging warehouse-in.
2. the processing technology of a kind of automobile engine crankshaft according to claim 1, is characterized in that, in the rough forging in described step (1): superior alloy steel 35CrMo selected by blank; Control at 1150 DEG C ~ 1200 DEG C to the forging temperature of blank, concrete control is 1180 DEG C.
3. the processing technology of a kind of automobile engine crankshaft according to claim 1, it is characterized in that, the annealing heat treatment process in described step (4): carry out annealing heat treatment to workpiece, temperature controls at 850 DEG C ~ 900 DEG C, concrete control is 880 DEG C, time remaining 7 minutes.
4. the processing technology of a kind of automobile engine crankshaft according to claim 1, is characterized in that, the modified process in described step (6) is: carry out modifier treatment to workpiece, and modifier treatment comprises high-frequency quenching and lonneal process; Hardening heat is 800 DEG C ~ 850 DEG C, and concrete control is 830 DEG C, and temperature retention time is 10 minutes; Temperature is 540 DEG C ~ 580 DEG C, and concrete control is 560 DEG C, and temperature retention time is 1.5 hours.
5. the processing technology of a kind of automobile engine crankshaft according to claim 1, is characterized in that, the rolling process in described step (11) is: carry out roll extrusion process to each hole of processing; Rolling amount is 0.015 ~ 0.035mm, is specially 0.020mm; The amount of feeding is 0.5 ~ 1.5mm/r, is specially 1.0mm/r; Rolling rotating speed is 250 ~ 500r/min, is specially 450r/min; Rolling 2 times.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105196012A (en) * | 2015-09-23 | 2015-12-30 | 四川飞亚汽车零部件有限公司 | Novel process for processing crankshaft |
| CN106002122A (en) * | 2016-06-30 | 2016-10-12 | 娄土岭 | Manufacturing process of automobile transmission shaft |
| CN106002113A (en) * | 2015-03-31 | 2016-10-12 | 三菱自动车工业株式会社 | A method of manufacturing a crankshaft |
| CN106514161A (en) * | 2016-11-04 | 2017-03-22 | 安徽江淮汽车集团股份有限公司 | Method for machining engine crankshaft and engine crankshaft |
| CN106826142A (en) * | 2017-02-21 | 2017-06-13 | 广东科学技术职业学院 | The manufacture method of automobile gearbox jackshaft |
| CN107175478A (en) * | 2017-05-30 | 2017-09-19 | 胡建锋 | A kind of motorcycle left part crankshaft part mechanical processing technique |
| CN107433430A (en) * | 2017-09-27 | 2017-12-05 | 安徽海立精密铸造有限公司 | A kind of bent axle exempts from processing technology of polishing |
| CN108941402A (en) * | 2018-09-19 | 2018-12-07 | 韶关市德丰机械有限公司 | A kind of crankshaft forging technique and its method |
| CN109048242A (en) * | 2018-11-10 | 2018-12-21 | 耿思宇 | A kind of processing technology of engine crankshaft |
| CN109128697A (en) * | 2018-08-10 | 2019-01-04 | 贵州新航力装备制造有限公司 | A kind of production technology of crankshaft |
| CN109746649A (en) * | 2019-03-13 | 2019-05-14 | 芜湖肯昌机电有限公司 | A kind of processing technology of engine crankshaft |
| CN110434570A (en) * | 2019-08-27 | 2019-11-12 | 四川科思精密模具有限公司 | A kind of processing method of hard mold centre hole |
| CN111037220A (en) * | 2019-12-12 | 2020-04-21 | 台州市烁达机械有限公司 | Machining and forming process for backing pump rotor |
| CN111185724A (en) * | 2020-04-10 | 2020-05-22 | 人本集团有限公司 | Eccentric inner ring, eccentric bearing machining method, eccentric bearing and eccentric clamp |
| CN111893256A (en) * | 2020-08-10 | 2020-11-06 | 湖南人文科技学院 | Manufacturing and strengthening method of high-performance core-setting connecting rod |
| CN115055921A (en) * | 2022-06-29 | 2022-09-16 | 山西柴油机工业有限责任公司 | Process method for strengthening bimetal machining surface of bottom hole of engine crankshaft |
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| CN106002113A (en) * | 2015-03-31 | 2016-10-12 | 三菱自动车工业株式会社 | A method of manufacturing a crankshaft |
| CN106002113B (en) * | 2015-03-31 | 2018-06-22 | 三菱自动车工业株式会社 | The manufacturing method of bent axle |
| CN105196012A (en) * | 2015-09-23 | 2015-12-30 | 四川飞亚汽车零部件有限公司 | Novel process for processing crankshaft |
| CN106002122A (en) * | 2016-06-30 | 2016-10-12 | 娄土岭 | Manufacturing process of automobile transmission shaft |
| CN106514161A (en) * | 2016-11-04 | 2017-03-22 | 安徽江淮汽车集团股份有限公司 | Method for machining engine crankshaft and engine crankshaft |
| CN106514161B (en) * | 2016-11-04 | 2018-09-11 | 安徽江淮汽车集团股份有限公司 | The processing method and engine crankshaft of engine crankshaft |
| CN106826142A (en) * | 2017-02-21 | 2017-06-13 | 广东科学技术职业学院 | The manufacture method of automobile gearbox jackshaft |
| CN106826142B (en) * | 2017-02-21 | 2018-09-28 | 广东科学技术职业学院 | The manufacturing method of automobile gearbox jackshaft |
| CN107175478A (en) * | 2017-05-30 | 2017-09-19 | 胡建锋 | A kind of motorcycle left part crankshaft part mechanical processing technique |
| CN107433430A (en) * | 2017-09-27 | 2017-12-05 | 安徽海立精密铸造有限公司 | A kind of bent axle exempts from processing technology of polishing |
| CN109128697A (en) * | 2018-08-10 | 2019-01-04 | 贵州新航力装备制造有限公司 | A kind of production technology of crankshaft |
| CN108941402A (en) * | 2018-09-19 | 2018-12-07 | 韶关市德丰机械有限公司 | A kind of crankshaft forging technique and its method |
| CN109048242A (en) * | 2018-11-10 | 2018-12-21 | 耿思宇 | A kind of processing technology of engine crankshaft |
| CN109048242B (en) * | 2018-11-10 | 2020-06-02 | 温岭市鑫都机械有限公司 | Machining process of engine crankshaft |
| CN109746649A (en) * | 2019-03-13 | 2019-05-14 | 芜湖肯昌机电有限公司 | A kind of processing technology of engine crankshaft |
| CN110434570A (en) * | 2019-08-27 | 2019-11-12 | 四川科思精密模具有限公司 | A kind of processing method of hard mold centre hole |
| CN111037220A (en) * | 2019-12-12 | 2020-04-21 | 台州市烁达机械有限公司 | Machining and forming process for backing pump rotor |
| CN111037220B (en) * | 2019-12-12 | 2021-01-12 | 台州市烁达机械有限公司 | Machining and forming process for backing pump rotor |
| CN111185724A (en) * | 2020-04-10 | 2020-05-22 | 人本集团有限公司 | Eccentric inner ring, eccentric bearing machining method, eccentric bearing and eccentric clamp |
| CN111893256A (en) * | 2020-08-10 | 2020-11-06 | 湖南人文科技学院 | Manufacturing and strengthening method of high-performance core-setting connecting rod |
| CN111893256B (en) * | 2020-08-10 | 2021-02-23 | 湖南人文科技学院 | Manufacturing and strengthening method of high-performance core-setting connecting rod |
| CN115055921A (en) * | 2022-06-29 | 2022-09-16 | 山西柴油机工业有限责任公司 | Process method for strengthening bimetal machining surface of bottom hole of engine crankshaft |
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Denomination of invention: Processing process of automobile engine crank shaft Effective date of registration: 20200114 Granted publication date: 20171020 Pledgee: Wendu Branch of Anhui Tongcheng Rural Commercial Bank Co.,Ltd. Pledgor: ANHUI JINQINGLONG MACHINERY CO.,LTD. Registration number: Y2020980000105 |
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Denomination of invention: A processing technology of automobile engine crankshaft Effective date of registration: 20230113 Granted publication date: 20171020 Pledgee: Wendu Branch of Anhui Tongcheng Rural Commercial Bank Co.,Ltd. Pledgor: ANHUI JINQINGLONG MACHINERY CO.,LTD. Registration number: Y2023980030759 |