CN102962637B - Manufacturing method for anti-cracking automobile oil pump drive shaft - Google Patents
Manufacturing method for anti-cracking automobile oil pump drive shaft Download PDFInfo
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- CN102962637B CN102962637B CN201210431000.8A CN201210431000A CN102962637B CN 102962637 B CN102962637 B CN 102962637B CN 201210431000 A CN201210431000 A CN 201210431000A CN 102962637 B CN102962637 B CN 102962637B
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Abstract
The invention discloses a manufacturing method for an anti-cracking automobile oil pump drive shaft. The manufacturing method comprises the following steps of: firstly, performing heat treatment on a shaft body of an automobile oil pump drive shaft to enable the surface hardness of the automobile oil pump drive shaft to reach HRC55-60, wherein the automobile oil pump drive shaft is made of 42CrMo steel, and HRC refers to Rockwell hardness; blanking to a rod reducing device after the heat treatment; performing rod reducing on the raw material of the automobile oil pump drive shaft by utilizing a rod reducing mold on the rod reducing device; specifically, applying an extrusion force to the raw material of the automobile oil pump drive shaft through the rod reducing mold to enable the raw material to generate slow plastic deformation to form the shaft body and a connecting rod; and arranging molecules of the raw material in order after the raw material deforms; secondly, cropping the shaft body molded after rod reducing and the connecting rod; specifically, polishing and cutting off the part of the automobile oil pump drive shaft, which does not meet the standard size; and finally, performing gear rolling on the cropped automobile oil pump drive shaft. According to the manufacturing method for the anti-cracking automobile oil pump drive shaft, the phenomenon that the component is cracked after the heat treatment is avoided. Moreover, the manufacturing process is simple; the material consumption is remarkably reduced; and the cost is saved.
Description
Technical field
The present invention relates to a kind of preparation method of the automobile fuel pump driving shaft for automobile steering system, a kind of manufacture method of crack resistence automobile fuel pump driving shaft is specifically provided.
Background technology
Automobile steering oil pump is core component in steering, and it is the power source of servo steering system, provides the work fluid of certain pressure and flow through steering control valve to steering actuation cylinder, and its work is operated.Automobile steering oil pump is equivalent to the heart of hydraulic power-assist steering system.Oil pump driving shaft is the core component of steering pump, but oil pump driving shaft exists the defect of following several respects in the prior art, one is the phenomenon that axis body exists often cracking, and part is difficult to check out at internal cleavage, be unfavorable for the security of automobile like this, time have the generation of accident; Two is that the precision of axis body has much room for improvement, and parts running is difficult to reach optimum efficiency.Through retrieval, application people is Shanghai Huapu Car Co., Ltd, and name is called a kind of Dual Drive oil pump, and its technical problem to be solved reduces power consumption, strengthens heat radiation; Application people is Zhejiang Geely Automobile Research Institute Co., Ltd, and name is called a kind of camshaft driving high-pressure oil pump, and its technical problem to be solved reduces to take up room, and simplifies structure, reduce gearing friction.In prior art, all do not solve the problem of Cracking of automobile fuel pump driving shaft appearance in use.Therefore, in order to overcome above-mentioned defect, be necessary to improve the manufacturing process of existing automobile fuel pump driving shaft.
Summary of the invention
The invention provides the manufacture method of crack resistence automobile fuel pump driving shaft, compared with original technology, the phenomenon ftractureed after solving parts heat treatment, and its processing and manufacturing process is easy, significantly reduces inventory charge, has saved cost.
The present invention solves the problems of the technologies described above the manufacture method that the technical scheme adopted is to provide a kind of crack resistence automobile fuel pump driving shaft, first, automobile fuel pump driving shaft selects 42CrMo steel, its axis body reaches HRC55 ~ 60 through its case hardness of Overheating Treatment, to the blanking of contracting lever apparatus after heat treatment, the contracting bar mould on contracting lever apparatus is utilized to carry out contracting bar to the former material of automobile fuel pump driving shaft, implementing extruding force specifically by contracting bar mould to the former material of automobile fuel pump driving shaft makes it produce slow plastic deformation, crimp becomes axis body, connecting rod, the arrangement of raw material molecule implementation rule after distortion,
Secondly, tack is carried out to axis body, the connecting rod passing through contracting bar aftershaping, is specially and non-compliant for automobile fuel pump driving shaft size is carried out polishing and excising;
Finally, gear rolling is carried out to the automobile fuel pump driving shaft through tack, be specially and adopt spline cold rolling technique, the head tooth of rolling automobile fuel pump driving shaft, threaded portion on axis body, the step section of rolling automobile fuel pump driving shaft on connecting rod.
The manufacture method of above-mentioned a kind of crack resistence automobile fuel pump driving shaft, wherein, the head tooth on axis body, threaded portion reach HRC28 ~ 32 through its case hardness of Overheating Treatment, and the step section on connecting rod reaches HRC28 ~ 32 through its case hardness of Overheating Treatment.
The manufacture method of above-mentioned a kind of crack resistence automobile fuel pump driving shaft, wherein, the step section on the head tooth on axis body, threaded portion and connecting rod, its concentricity is within 0.05mm.
The manufacture method of above-mentioned a kind of crack resistence automobile fuel pump driving shaft, wherein, contracting lever apparatus is provided with and steps up guide device, in the vertical direction will treat that contracting bar material is fixed, corresponding with treating contracting bar material in the horizontal direction and be squeezed in contracting bar mould, after extruding puts in place, vertical direction will treat that contracting bar material is unclamped, after contracting bar is shaping, it pulls out by corresponding finished product applying pulling force from contracting bar mould in the horizontal direction.
The present invention contrasts prior art and has following beneficial effect: by manufacture method provided by the invention, produced automobile fuel pump driving shaft, the outer surface hardness of its axis body is HRC55 ~ 60, the hardness of head tooth, threaded portion, step section is HRC28 ~ 32, solve the problem of original part cracking, improve the security of equipment running, reduce the risk that accident occurs.Head tooth is relative to threaded portion and step section, and its concentricity controls within 0.05mm, ensure that the superperformance of machinery.In addition, this product is compared with original, and its processing and manufacturing process is easy, significantly reduces inventory charge, has saved cost.
Accompanying drawing explanation
Fig. 1 is the planar structure schematic diagram according to the invention provides the automobile fuel pump driving shaft that manufacture method manufactures.
Fig. 2 is the planar structure schematic diagram according to the invention provides the automobile fuel pump driving shaft that manufacture method manufactures.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the planar structure schematic diagram according to the invention provides the automobile fuel pump driving shaft that manufacture method manufactures.In figure, axis body 1, connecting rod 2, threaded portion 3, head tooth 4, step section 5.
Refer to Fig. 1 and Fig. 2, contracting bar technique, be that the bar of D or materials in the tube make it be the fenestra of d by diameter under external force by diameter, make its diameter be d.The manufacture method of a kind of crack resistence automobile fuel pump driving shaft provided by the invention, first, automobile fuel pump driving shaft selects 42CrMo steel, its axis body reaches HRC55 ~ 60 through its case hardness of Overheating Treatment, to the blanking of contracting lever apparatus after heat treatment, the contracting bar mould on contracting lever apparatus is utilized to carry out contracting bar to the former material of automobile fuel pump driving shaft, implementing extruding force specifically by contracting bar mould to the former material of automobile fuel pump driving shaft makes it produce slow plastic deformation, crimp becomes axis body, connecting rod, the arrangement of raw material molecule implementation rule after distortion;
Secondly, tack is carried out to axis body 1, the connecting rod 2 passing through contracting bar aftershaping, is specially and non-compliant for automobile fuel pump driving shaft size is carried out polishing and excising;
Finally, gear rolling is carried out to the automobile fuel pump driving shaft through tack, be specially and adopt spline cold rolling technique, the head tooth 4 of rolling automobile fuel pump driving shaft, threaded portion 3 on axis body, on connecting rod 2, the step section 5 of rolling automobile fuel pump driving shaft, adopts Numeric Control Technology to control in this step implementation process.
Present invention process instead of traditional cold heading technique, the risk ftractureed after can stopping part heat treatment completely, and cold-heading, because material molecule produces distortion instantaneously, usually can make material molecule arrange mixed and disorderly, cause material cracks probability very large.Compare with cold heading technique, this programme saves 80% material consumption, saves the process time of 30%, while raising automobile kernel component quality, also significantly reduce cost.
In addition, the head tooth 4 on axis body 1, threaded portion 3 reach HRC28 ~ 32 through its case hardness of Overheating Treatment, and the step section 5 on connecting rod 2 reaches HRC28 ~ 32 through its case hardness of Overheating Treatment, fully ensure that mechanical performance.Step section 5 on head tooth 4 on axis body 1, threaded portion 3 and connecting rod 2, its concentricity is within 0.05mm.Traditional cold heading technique or contracting bar technique, be heat-treating axis body 1 after contracting bar, so uncontrollable concentricity is within 0.05mm, can not ensure the accurate dimension of parts.Contracting lever apparatus is provided with and steps up guide device, in the vertical direction will treat that contracting bar material is fixed, corresponding with treating contracting bar material in the horizontal direction and be squeezed in contracting bar mould, after extruding puts in place, vertical direction will treat that contracting bar material is unclamped, after contracting bar is shaping, it pulls out by corresponding finished product applying pulling force from contracting bar mould in the horizontal direction.
Although the present invention discloses as above with preferred embodiment; so itself and be not used to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little amendment and perfect, therefore protection scope of the present invention is when being as the criterion of defining with claims.
Claims (4)
1. a manufacture method for crack resistence automobile fuel pump driving shaft, is characterized in that:
First, automobile fuel pump driving shaft selects 42CrMo steel, its axis body reaches HRC55 ~ 60 through its case hardness of Overheating Treatment, to the blanking of contracting lever apparatus after heat treatment, the contracting bar mould on contracting lever apparatus is utilized to carry out contracting bar to the former material of automobile fuel pump driving shaft, implementing extruding force specifically by contracting bar mould to the former material of automobile fuel pump driving shaft makes it produce slow plastic deformation, and crimp becomes axis body, connecting rod, the arrangement of raw material molecule implementation rule after distortion;
Secondly, tack is carried out to axis body, the connecting rod passing through contracting bar aftershaping, is specially and non-compliant for automobile fuel pump driving shaft size is carried out polishing and excising;
Finally, gear rolling is carried out to the automobile fuel pump driving shaft through tack, be specially and adopt spline cold rolling technique, the head tooth of rolling automobile fuel pump driving shaft, threaded portion on axis body, the step section of rolling automobile fuel pump driving shaft on connecting rod.
2. the manufacture method of a kind of crack resistence automobile fuel pump driving shaft according to claim 1, it is characterized in that: the head tooth on axis body, threaded portion reach HRC28 ~ 32 through its case hardness of Overheating Treatment, and the step section on connecting rod reaches HRC28 ~ 32 through its case hardness of Overheating Treatment.
3. the manufacture method of a kind of crack resistence automobile fuel pump driving shaft according to claim 1, is characterized in that: the step section on the head tooth on axis body, threaded portion and connecting rod, its concentricity is within 0.05mm.
4. the manufacture method of a kind of crack resistence automobile fuel pump driving shaft according to claim 1, it is characterized in that: contracting lever apparatus is provided with and steps up guide device, in the vertical direction will treat that contracting bar material is fixed, corresponding with treating contracting bar material in the horizontal direction and be squeezed in contracting bar mould, after extruding puts in place, vertical direction will treat that contracting bar material is unclamped, after contracting bar is shaping, it pulls out by corresponding finished product applying pulling force from contracting bar mould in the horizontal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210431000.8A CN102962637B (en) | 2012-11-01 | 2012-11-01 | Manufacturing method for anti-cracking automobile oil pump drive shaft |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210431000.8A CN102962637B (en) | 2012-11-01 | 2012-11-01 | Manufacturing method for anti-cracking automobile oil pump drive shaft |
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| CN102962637A CN102962637A (en) | 2013-03-13 |
| CN102962637B true CN102962637B (en) | 2015-06-03 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493437A (en) * | 2014-11-25 | 2015-04-08 | 浙江铂达科技有限公司 | Oil pump shaft machining process |
| CN110605308B (en) * | 2018-06-15 | 2020-09-29 | 洛阳道熹机械有限公司 | Hot extrusion forming method and die for driving shaft blank |
| CN114135565A (en) * | 2021-10-12 | 2022-03-04 | 宁波镇明转轴有限公司 | Novel automobile oil pump driving shaft and machining process thereof |
| CN115870710B (en) * | 2022-11-04 | 2023-07-14 | 宁波三峰机械电子股份有限公司 | Machining process for precise threads of pinion shaft |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040060385A1 (en) * | 2002-09-16 | 2004-04-01 | Prucher Bryan P. | One-piece axle tube housing assembly |
| JP4741687B2 (en) * | 2009-03-03 | 2011-08-03 | 日本特殊陶業株式会社 | Manufacturing method of metal shell for spark plug |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1359766A (en) * | 2000-12-19 | 2002-07-24 | 北京机电研究所 | One-step cold squeeze technology for machining multi-stepped shaft |
| CN1911548A (en) * | 2006-09-01 | 2007-02-14 | 河南北方红阳工业有限公司 | Shaping technology of solid axle and horizontal hydraulic machine used for implementating said technology |
| CN101513702A (en) * | 2008-02-20 | 2009-08-26 | 周蔚 | Process and device for cold extrusion forming of gear pump main shaft |
| CN101328930A (en) * | 2008-07-29 | 2008-12-24 | 沈国元 | Cold-extruded machining process of diesel starting shaft |
| CN101602074A (en) * | 2009-07-23 | 2009-12-16 | 宁波安拓实业有限公司 | Powerful car is repaiied the gecko multistation cold extrusion forming method |
| CN101954574A (en) * | 2010-09-26 | 2011-01-26 | 中国兵器工业第五九研究所 | Method for machining output shaft assembly |
| CN102513792A (en) * | 2011-12-28 | 2012-06-27 | 上海久丰汽车零件有限公司 | Cold extrusion forming process for oil pump shaft for automobile |
| CN102615124A (en) * | 2012-01-09 | 2012-08-01 | 泉州凤顺汽车零部件有限公司 | Production process and production equipment for half shaft contracting rod |
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| CN102962637A (en) | 2013-03-13 |
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