CN103695758A - Production method of fully-chilled camshaft - Google Patents
Production method of fully-chilled camshaft Download PDFInfo
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- CN103695758A CN103695758A CN201310710409.8A CN201310710409A CN103695758A CN 103695758 A CN103695758 A CN 103695758A CN 201310710409 A CN201310710409 A CN 201310710409A CN 103695758 A CN103695758 A CN 103695758A
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Abstract
The invention relates to a production method of a fully-chilled camshaft. The production method comprises the steps of proportioning components of the camshaft, core shooting, sand core cooling and pouring, wherein the camshaft comprises the following components in percentage by mass: 3.2-3.3% of carbon (C), 1.6-1.7% of silicon (Si), 0.35-0.45% of chromium (Cr), 0.6-0.7% of manganese (Mn), 0.6-0.7% of molybdenum (Mo) and 0.4-0.5% of nickel (Ni). The temperature of a section mould is 180-210 DEG C during core shooting; time for cooling the sand core lasts for 12-15 hours; and the temperature during the pouring of materials of the camshaft is 1400-1430 DEG C. According to the production method of the fully-chilled camshaft, ratios of chemical components of camshaft production materials are changed and process parameters are optimized, so that the defects of low hardness of a camshaft tip part and insufficient depth of a chilled layer are effectively solved; volume production is facilitated by using a hot core box process; the production method of the fully-chilled camshaft is high in yield and high in qualified rate; and the production cost is lowered.
Description
Technical field
The present invention relates to a kind of production method of engine cam, be specifically related to a kind of production method of using the full-chilled camshaft of heated core box.
Background technology
At present, engine cam is a kind of baroque thin and long shafts part being comprised of a plurality of axle journals and cam, for driving valve motion, strength and stiffness is had to higher requirement.The method of producing at present camshaft has a lot, but mainly lay particular emphasis on mechanical processing technique, material mixture ratio to camshaft in the course of processing and course of processing parameter study are not deeply, because radial dimension and the camshaft benchmark diameter of axle size difference of camshaft journal and cam are very greatly different, and the distribution on camshaft of axle journal and cam is comparatively concentrated, general main employing casting technique production method is manufactured.In the proportioning of more existing camshaft processing and manufacturing parameter materials, the massfraction of carbon (C) is 2.9%-3.0%, the massfraction of silicon (Si) is 1.9%-2.0%, the massfraction of chromium (Cr) is 0.6%-0.9%, the massfraction of manganese (Mn) is 0.6%-0.7%, the massfraction of molybdenum (Mo) is less than 0.25%, the massfraction of nickel (Ni) is 0.3%-0.7%, the cooling time of core is generally lower than 4 hours, adopt this parameter can improve preferably the intensity of camshaft, rigidity, but the hardness at nose position is not high, the degree of depth of chill is inadequate, scrap rate is higher in process of production, thereby cost is high, working (machining) efficiency is low.
Summary of the invention
The object of the invention is to overcome in prior art Camshaft Production process because nose hardness is inadequate and the not high deficiency that produces a large amount of waste products of the chill degree of depth, a kind of new material chemical composition proportioning is provided, can significantly improves the full-chilled Camshaft Production method of production qualification rate.In order to achieve the above object, the technical solution adopted in the utility model is: comprise camshaft composition proportion, core shooting, core cooling and cast step, in described camshaft composition proportion, the massfraction of carbon (C) is 3.2%-3.3%, the massfraction of silicon (Si) is 1.6%-1.7%, the massfraction of chromium (Cr) is 0.35%-0.45%, the massfraction of manganese (Mn) is 0.6%-0.7%, the massfraction of molybdenum (Mo) is 0.6%-0.7%, the massfraction of nickel (Ni) is 0.4%-0.5%, during described core shooting, pattern temperature is 180 ℃-210 ℃, described core cooling time is 12-15 hour, the temperature of described camshaft material cast is 1400 ℃-1430 ℃.Advantage of the present invention is: the production method that the invention provides a kind of full-chilled camshaft, by changing the chemical composition proportioning of Camshaft Production material and process parameter being optimized, efficiently solve nose position lower hardness and the inadequate defect of the chill degree of depth, be convenient to adopt hot box process to produce in batches, output is high, qualification rate is high, has reduced production cost.Embodiment [0004] is described in further detail embodiments of the invention below.Embodiment 1, comprise camshaft composition proportion, core shooting, core is cooling and cast step, in described camshaft composition proportion, the massfraction of carbon (C) is 3.2%%, the massfraction of silicon (Si) is 1.6%, the massfraction of chromium (Cr) is 0.35%, the massfraction of manganese (Mn) is 0.6%, the massfraction of molybdenum (Mo) is 0.6%, the massfraction of nickel (Ni) is 0.4%, during described core shooting, pattern temperature is 180 ℃, described core cooling time is 12 hours, and the temperature of described camshaft material cast is 1400 ℃.Embodiment 2, the present invention includes camshaft composition proportion, core shooting, core is cooling and cast step, in described camshaft composition proportion, the massfraction of carbon (C) is 3.3%, the massfraction of silicon (Si) is 1.7%, the massfraction of chromium (Cr) is 0.45%, the massfraction of manganese (Mn) is 0.7%, the massfraction of molybdenum (Mo) is 0.7%, the massfraction of nickel (Ni) is 0.5%, during described core shooting, pattern temperature is 210 ℃, described core cooling time is 15 hours, and the temperature of described camshaft material cast is 1430 ℃.The present invention adopts cold box process casting production line removable-flask moulding, and die size 412.5mm*57.4mm adopts one case mode of two to produce full-chilled camshaft, mainly comprise change camshaft chemical composition proportioning, core shooting, core is cooling and the step such as cast.First be to change camshaft chemical composition proportioning, this is the effective content that fundamentally changes alloying constituent, design parameter is as follows: the massfraction of carbon (C) is that the massfraction of 3.2%-3.3%, silicon (Si) is that the massfraction of 1.6%-1.7%, chromium (Cr) is that the massfraction of 0.35%-0.45%, manganese (Mn) is that the massfraction of 0.6%-0.7%, molybdenum (Mo) is that the massfraction of 0.6%-0.7%, nickel (Ni) is 0.4%-0.5%, and all the other compositions are iron (Fe).Core shooting adopts core shooting machine to utilize pressurized air that molding sand is injected to pre-consolidation in sandbox equably, and then exerts pressure and carry out compacting, and the present invention adopts upper and lower two-part mo(u)lding, and nowel is placed chill, and the pattern temperature adopting when core shooting is 180 ℃-210 ℃.Core of the present invention cooling time is 12-15 hour.Camshaft material of the present invention temperature when cast is controlled between 1400 ℃-1430 ℃.
Claims (1)
1. a full-chilled Camshaft Production method, it is characterized in that: comprise camshaft composition proportion, core shooting, core cooling and cast step, in described camshaft composition proportion, the massfraction of carbon (C) is 3.2%-3.3%, the massfraction of silicon (Si) is 1.6%-1.7%, the massfraction of chromium (Cr) is 0.35%-0.45%, the massfraction of manganese (Mn) is 0.6%-0.7%, the massfraction of molybdenum (Mo) is 0.6%-0.7%, the massfraction of nickel (Ni) is 0.4%-0.5%, during described core shooting, pattern temperature is 180 ℃-210 ℃, described core cooling time is 12-15 hour, the temperature of described camshaft material cast is 1400 ℃-1430 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310710409.8A CN103695758A (en) | 2013-12-23 | 2013-12-23 | Production method of fully-chilled camshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310710409.8A CN103695758A (en) | 2013-12-23 | 2013-12-23 | Production method of fully-chilled camshaft |
Publications (1)
| Publication Number | Publication Date |
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| CN103695758A true CN103695758A (en) | 2014-04-02 |
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| CN201310710409.8A Pending CN103695758A (en) | 2013-12-23 | 2013-12-23 | Production method of fully-chilled camshaft |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105499511A (en) * | 2015-12-09 | 2016-04-20 | 芜湖瑞鹄铸造有限公司 | Rotating cam manufacturing method |
| CN108031794A (en) * | 2018-01-18 | 2018-05-15 | 宜兴市环宇轴瓦制造有限公司 | Cement rotary kiln supporting-roller shaft lining tile casting device and casting method |
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| CN1123337A (en) * | 1994-11-24 | 1996-05-29 | 谢洪来 | Cold excited alloy nodular cast iron and casting method for camshaft |
| JP2001129640A (en) * | 1999-11-04 | 2001-05-15 | Hitachi Metals Ltd | Method of casting thin, flat article and cast article |
| EP1213071A2 (en) * | 2000-12-07 | 2002-06-12 | Fritz Winter Eisengiesserei GmbH & Co. KG | Method, apparatus and cast iron alloy for producing a camshaft with moulded cams |
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| CN202943212U (en) * | 2012-10-30 | 2013-05-22 | 长沙酉诚凸轮轴制造有限公司 | Novel chilling block mould for producing chilling camshaft |
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2013
- 2013-12-23 CN CN201310710409.8A patent/CN103695758A/en active Pending
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| EP1213071A2 (en) * | 2000-12-07 | 2002-06-12 | Fritz Winter Eisengiesserei GmbH & Co. KG | Method, apparatus and cast iron alloy for producing a camshaft with moulded cams |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105499511A (en) * | 2015-12-09 | 2016-04-20 | 芜湖瑞鹄铸造有限公司 | Rotating cam manufacturing method |
| CN108031794A (en) * | 2018-01-18 | 2018-05-15 | 宜兴市环宇轴瓦制造有限公司 | Cement rotary kiln supporting-roller shaft lining tile casting device and casting method |
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Application publication date: 20140402 |