CN202690720U - Fillet rolling ductile iron crankshaft - Google Patents
Fillet rolling ductile iron crankshaft Download PDFInfo
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- CN202690720U CN202690720U CN 201220347325 CN201220347325U CN202690720U CN 202690720 U CN202690720 U CN 202690720U CN 201220347325 CN201220347325 CN 201220347325 CN 201220347325 U CN201220347325 U CN 201220347325U CN 202690720 U CN202690720 U CN 202690720U
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- journal
- crankshaft
- fillet
- rolling
- fillet rolling
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Abstract
The utility model discloses a fillet rolling ductile iron crankshaft. The crankshaft is made of a QT800-6 ductile cast iron material, is high in elongation percentage and impact value, and can effectively improve rolling force; knuckles of a main journal, a rod journal and crank arms have an undercutting structure, so that the key sizes such as straightness, cylindricity and the like of the main journal and the rod journal can be guaranteed, and the phenomenon that the surface of the journal is bulged because part of materials flow in the rolling process can be avoided; and journal quenching and fillet rolling strengthened processes are adopted by the fillet rolling ductile iron crankshaft, so that the high fatigue and bending moment performance can be achieved, the level of the crankshaft is higher than that of a forged steel nitrided crankshaft or close to that of a forged steel quenched crankshaft, the reliable performance can be guaranteed, and cost can be reduced obviously.
Description
Technical field
The present invention relates to the engine apparatus field, relate in particular to a kind of motor bent axle.
Background technique
At present, what domestic medium and heavy motor adopted is forged steel nitrogenize or forged steel quenching bent axle, and the characteristics of forged steel quenching bent axle are that intensity is high, but reliability is relative with wear resistance relatively poor, and expensive.
Summary of the invention
The problems referred to above that exist in order to overcome traditional forged steel nitrogenize or forged steel quenching bent axle the invention provides the fillet rolling spherulitic iron crankshaft that a kind of reliability is high, cost is low.
The technological scheme that the present invention adopts for achieving the above object is: the fillet rolling spherulitic iron crankshaft, comprise main journal and rod journal, main journal and rod journal lay respectively at the crankweb both sides, and the knuckle place of main journal, rod journal and crankweb is the undercut groove structure.
Described bent axle adopts the QT800-6 ductile iron crankshaft material with higher specific elongation and impact value.
The degree of depth h that the knuckle of described main journal, rod journal and crankweb is lower than in main journal, the rod journal surface is 0.5 ± 0.1mm.
Described main journal, rod journal undercut groove fillet are R2.5 ± 0.1mm, and width l is 3.76mm.
Fillet rolling spherulitic iron crankshaft of the present invention, adopt the high-strength novel crankshaft material of the QT800-6 trade mark, device for sand coated iron mould technique is adopted in casting, makes the more refinement of surperficial nodular graphitic structure, the finished product roughness is greatly improved, and this material has the impact value of higher specific elongation and Geng Gao; Main journal and rod journal fillet be the undercut groove structure, prevented that part material in the rolling process from exceeding the phenomenon of journal surface; The fillet rolling spherulitic iron crankshaft adopts " the angle roll extrusion of axle journal quenching+garden " reinforcement process, can obtain higher tired moment of flexure performance, surpasses the forged steel nitrided crankshaft, near the level of forged steel quenching bent axle, can guarantee reliability, can reduce cost again.
Description of drawings
Fig. 1 is the structural drawing of forged steel nitrogenize or forged steel quenching bent axle in the prior art.
Fig. 2 is main journal, the rod journal fillet part separation structure figure of fillet rolling spherulitic iron crankshaft of the present invention.
Fig. 3 is the cut-away section structural drawing of forged steel nitrogenize or forged steel quenching bent axle in the prior art.
Fig. 4 is the cut-away section structural drawing of fillet rolling spherulitic iron crankshaft of the present invention.
Embodiment
Forged steel Rouno Cormer Pregrinding Wheel quenching crankshaft structure of the prior art as shown in figures 1 and 3, comprise main journal 2 and rod journal 3, main journal 2 and rod journal 3 are installed between the crankweb 1, main journal, rod journal fillet 4 are R5, adopt axle journal and fillet integral quenching technique, hardened layer 8 thickness are 2.0 ~ 5.0mm, and fillet place to push and block are not less than 5.5mm, all the other shelves are not less than 5mm, guarantee that boss hardens.Because this Rouno Cormer Pregrinding Wheel structure, cause that the part material exceeds journal surface in the rolling process, and reliability is relative with wear resistance relatively poor, adopts the forged steel material price expensive.
Fillet rolling spherulitic iron crankshaft structure of the present invention such as Fig. 2 and shown in Figure 4, main journal, the rod journal fillet 4 of main journal 2, rod journal 3 ends and crankweb 1 joint are the undercut groove structure, the degree of depth h that main journal, rod journal fillet 4 sink in main journal or the rod journal surface 6 is 0.5 ± 0.1mm, main journal, rod journal fillet 4 are R2.5 ± 0.1mm, two ends are 3.76mm apart from l
Bent axle adopts QT800-6 ductile iron crankshaft material.The technique that adopts fillet rolling+axle journal to quench, main journal, rod journal fillet 4 adopt rolling technology, and main journal 2 and rod journal 3 adopt quenching technical.Main journal, rod journal fillet 4 adopt the roll extrusion of R2.3 high-strength abrasion-proof roller.Main journal 2 and rod journal 3 induction hardenings and destressing, surface hardness 45 ~ 52HRC, dark 1.5 ~ 3.0mm quenches.
The material characteristics of fillet rolling spherulitic iron crankshaft of the present invention: the high-strength novel crankshaft material that adopts the QT800-6 trade mark, device for sand coated iron mould technique is adopted in casting, make the more refinement of surperficial nodular graphitic structure, the finished product roughness is greatly improved, this material has the impact value of higher specific elongation and Geng Gao.Conventional QT800-4 ductile iron material can't reach these performances.
| Classification | Tensile strength (MPa) | Specific elongation (%) | Impact toughness (J/Cm2) | Hardness (HB) |
| QT800-6 | 900 | 6-8 | 48-56 | 270-300 |
| QT800-4 | 780 | 4 | 19.6 | 260-310 |
The fillet rolling spherulitic iron crankshaft adopts " the angle roll extrusion of axle journal quenching+garden " reinforcement process, can obtain higher tired moment of flexure performance, surpasses the forged steel nitrided crankshaft, near the level of forged steel quenching bent axle, can guarantee reliability, can reduce cost again.
| Common magnesium iron | The fillet rolling magnesium iron | The nitriding steel axle | The Chilled Hardened Steel axle | |
| Tired moment of flexure (N.m) | 1800 | 3750 | 2800 | 4000 |
Main journal and rod journal fillet be the undercut groove structure, prevented that part material in the rolling process from exceeding the phenomenon of journal surface, can guarantee reliability, can reduce cost again.
Claims (4)
1. fillet rolling spherulitic iron crankshaft, it is characterized in that: comprise main journal (2) and rod journal (3), main journal (2) and rod journal (3) lay respectively at crankweb (1) both sides, and main journal (2), rod journal (3) are the undercut groove structure with the knuckle place (4) of crankweb (1).
2. fillet rolling spherulitic iron crankshaft according to claim 1 is characterized in that: the QT800-6 ductile iron crankshaft material that described bent axle employing has higher specific elongation and impact value.
3. fillet rolling spherulitic iron crankshaft according to claim 1 is characterized in that: the degree of depth h that the knuckle of described main journal, rod journal and crankweb (4) is lower than in main journal, the rod journal surface (6) is 0.5 ± 0.1mm.
4. fillet rolling spherulitic iron crankshaft according to claim 1, it is characterized in that: described main journal, rod journal undercut groove fillet (4) are R2.5 ± 0.1mm, and width l is 3.76mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220347325 CN202690720U (en) | 2012-07-18 | 2012-07-18 | Fillet rolling ductile iron crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220347325 CN202690720U (en) | 2012-07-18 | 2012-07-18 | Fillet rolling ductile iron crankshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202690720U true CN202690720U (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220347325 Expired - Lifetime CN202690720U (en) | 2012-07-18 | 2012-07-18 | Fillet rolling ductile iron crankshaft |
Country Status (1)
| Country | Link |
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| CN (1) | CN202690720U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777480A (en) * | 2012-07-18 | 2012-11-14 | 道依茨一汽（大连）柴油机有限公司 | Fillet rolling nodular cast iron crankshaft and machining technology thereof |
| CN105964848A (en) * | 2015-03-12 | 2016-09-28 | 本田技研工业株式会社 | Strengthening method for fillet part of crankshaft and stengthening device therefor |
-
2012
- 2012-07-18 CN CN 201220347325 patent/CN202690720U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777480A (en) * | 2012-07-18 | 2012-11-14 | 道依茨一汽（大连）柴油机有限公司 | Fillet rolling nodular cast iron crankshaft and machining technology thereof |
| CN105964848A (en) * | 2015-03-12 | 2016-09-28 | 本田技研工业株式会社 | Strengthening method for fillet part of crankshaft and stengthening device therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
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: 116600 No. 117 Huanghai Middle Road, Dalian Economic and Technological Development Zone, Liaoning Province Patentee before: DEUTZ (DALIAN) ENGINE CO.,LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130123 |