CN102615202B - Method for inner high-pressure forming coupling of camshaft - Google Patents
Method for inner high-pressure forming coupling of camshaft Download PDFInfo
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- CN102615202B CN102615202B CN201210078263.5A CN201210078263A CN102615202B CN 102615202 B CN102615202 B CN 102615202B CN 201210078263 A CN201210078263 A CN 201210078263A CN 102615202 B CN102615202 B CN 102615202B
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- camshaft
- central siphon
- cam unit
- liquid
- locating ring
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Abstract
The invention provides a method for inner high-pressure forming coupling of a camshaft. The method comprises the following steps: coupling a cam unit and a positioning ring on a shaft tube, thereby forming a camshaft primary body; placing the camshaft primary body into a camshaft mould and closing the camshaft mould; injecting liquid in a cylinder into the shaft tube; pressurizing the liquid in the shaft tube from two ends of the shaft tube by a high-pressure source; controlling the pressure of the liquid in the shaft tube by a controller of the high pressure source; causing the shaft tube, the positioning ring and the cam unit to elastically deform; and stopping pressurizing, relieving the liquid pressure in the shaft tube, elastically recovering the shaft tube, the positioning ring and the cam unit, and obtaining the required camshaft. According to the method for the inner high-pressure forming coupling of the camshaft, the demand on precision of parts is reduced and the processing process is reduced; the camshaft is integrally once fixed and coupled; the production process of the camshaft is simplified; and the production efficiency of the camshaft is increased. The invention also provides a device for the inner high-pressure forming coupling of the camshaft.
Description
Technical field
The present invention relates to camshaft manufacturing equipment technical field, more particularly, relate to a kind of internal high pressure forming socketing method of camshaft.
Background technology
Camshaft is mainly used in engine, and its effect is to control the action of the opening and closing of valve.Because valve motion rule is related to power and the service performance of an engine, so camshaft is one of vitals of engine.
At present, camshaft mainly adopts fabricated structure, the large camshaft of whole difficulty of processing is decomposed into processing and is relatively easy to cam unit and central siphon, then by diverse ways, cam unit and central siphon are coupled together to formation camshaft.According to the difference of method of attachment, the knockdown manufacture method of camshaft is mainly hot charge practice, bonding method or key connection method.
But, hot charge practice and bonding method require stricter to the fit-up gap of camshaft, for example the endoporus of central siphon, locating ring and cam unit endoporus need accurately processing, make the manufacturing procedure of central siphon, locating ring and cam unit more complicated, the manufacturing time of camshaft is longer, causes the production efficiency of camshaft lower; The manufacturing process of key connection method is also more complicated, need on central siphon, mill out keyway, makes the manufacturing procedure of camshaft more complicated, causes the production efficiency of camshaft lower.
Simultaneously, hot charge practice, bonding method and key connection method are when being combined into camshaft, once can only combine a central siphon, a locating ring and a cam unit or some central siphons, some locating rings and some cams unit, need combination repeatedly just can be combined into complete camshaft, make the production process of camshaft more loaded down with trivial details, production process is more, finally causes the production efficiency of camshaft lower.
In addition, application hot joining method is in the process of combined camshaft, and the phase angle of camshaft is wayward, causes the moment of torsion reliability of camshaft lower; Meanwhile, the equipment manufacturing cost that key connection method needs is higher.
In sum, how simplifying the production process of camshaft, and then improve the production efficiency of camshaft, is current those skilled in the art's problem demanding prompt solution.
Summary of the invention
In view of this, the invention provides a kind of internal high pressure forming socketing method of camshaft, simplified the production process of camshaft, and then improve the production efficiency of camshaft.
In order to achieve the above object, the invention provides following technical scheme:
An internal high pressure forming socketing method for camshaft, comprising:
1) cam unit and locating ring are set on central siphon, form just body of camshaft;
2) the first body of described camshaft is put into camshaft mould, and by described camshaft mould matched moulds;
3) liquid in cylinder body is injected in described central siphon;
4) by high-voltage power supply from the two ends of described central siphon to the liquid pressing in described central siphon, by the controller of high-voltage power supply, control the fluid pressure in described central siphon, make described central siphon generation plastic expansion until the outer wall of described central siphon and the inwall of described locating ring contact with the inwall of described cam unit, continuation is to the liquid pressing in described central siphon, make described locating ring and described cam unit generation strain, and the elastic recovery amount of described locating ring and described cam unit is all greater than the elastic recovery amount of described central siphon;
5) stop the liquid pressing in described central siphon, and shed the pressure of described axle liquid in pipe, described central siphon, described locating ring and described cam unit generation elastic recovery, obtain required camshaft.
Preferably, in the internal high pressure forming socketing method of above-mentioned camshaft, described central siphon stretches in described camshaft mould outward.
Preferably, in the internal high pressure forming socketing method of above-mentioned camshaft, adopt plunger mechanism that the liquid in described cylinder body is injected to described central siphon inner.
The internal high pressure forming socketing method of camshaft provided by the invention, adopt camshaft mould, method by internal high pressure forming is fixed on cam unit and locating ring on central siphon, obtain required camshaft, compare with bonding method with existing hot charge practice, for the endoporus of cam unit and locating ring, the external diameter requirement on machining accuracy of central siphon is lower; Compare with existing key connection method, without keyway is set on central siphon, thereby reduced manufacturing procedure, reduced production process, and then improved the production efficiency of camshaft.
Simultaneously, the internal high pressure forming socketing method of camshaft provided by the invention, all cam unit are fixed on central siphon together with locating ring, same camshaft is without being repeatedly socketed, be that camshaft one piece completes socket, simplify the production process of camshaft, and then improved the production efficiency of camshaft.
Meanwhile, the invention provides the internal high pressure forming socketing method of camshaft, camshaft one piece completes socket, controls the phase angle of camshaft by camshaft mould, can control preferably the phase angle of camshaft, and then has improved the moment of torsion reliability of camshaft; And the cost of camshaft mould is lower, to compare with the equipment that existing key connection method is required, equipment manufacturing cost is lower, has reduced the production cost of camshaft.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The schematic flow sheet of the internal high pressure forming socketing method of the camshaft that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the internal high pressure forming sleeve joint device of the camshaft that Fig. 2 provides for the embodiment of the present invention.
In upper Fig. 1-2:
Cylinder rack 1, cylinder body 2, punch holder 3, drift pressing plate 4, flange 5, drift 6, slide block 7, upper bolster 8, upper module 9, positioning key 10, camshaft 11, lower module 12, die shoe 13, workbench 14.
The specific embodiment
The invention provides a kind of internal high pressure forming socketing method of camshaft, simplified the production process of camshaft, and then improve the production efficiency of camshaft.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to accompanying drawing 1-2, the schematic flow sheet of the internal high pressure forming socketing method of the camshaft that Fig. 1 provides for the embodiment of the present invention; The structural representation of the internal high pressure forming sleeve joint device of the camshaft that Fig. 2 provides for the embodiment of the present invention.
The internal high pressure forming socketing method of the camshaft that the embodiment of the present invention provides, comprising:
Step S01: cam unit and locating ring are set on central siphon, form just body of camshaft;
Camshaft 11 comprises: central siphon, be set in the cam unit on central siphon, and for the locating ring to cam unit axial limiting.Respectively ready cam unit and locating ring are set on central siphon, form just body of camshaft, now, cam unit and locating ring are not fixedly linked with central siphon, cam unit and locating ring reserved primary clearance respectively and between central siphon.
Step S02: the first body of camshaft is put into camshaft mould, and by camshaft mould matched moulds;
By the camshaft camshaft mould that just body is put into and the first body of this camshaft matches, by the internal structure restriction cam unit of camshaft mould and the axial displacement of locating ring, then by this camshaft mould matched moulds, in matched moulds process, the general clamping pressure machine that adopts carries out matched moulds.
Step S03: the liquid in cylinder body 2 is injected in central siphon;
Outer setting at camshaft mould has cylinder body 2, in this cylinder body 2, stores liquid, and this liquid is injected in central siphon.Liquid in cylinder body 2 can be lubricating oil, and the present invention does not do concrete restriction to the liquid in cylinder body 2.
Step S04: to the liquid pressing in central siphon, regulate the fluid pressure in central siphon from the two ends of central siphon, make central siphon, locating ring and cam unit that strain all occur;
By high-voltage power supply from the two ends of central siphon to the liquid pressing in central siphon, the size of the fluid pressure in central siphon is controlled, is regulated by the controller of high-voltage power supply, make central siphon generation plastic expansion until the outer wall of central siphon and the inwall of locating ring contact with the inwall of cam unit, continuation, to the liquid pressing in central siphon, makes locating ring and cam unit generation strain.
Step S05: stop the liquid pressing in central siphon, and shed the hydraulic coupling in central siphon, central siphon, locating ring and cam unit generation elastic recovery, obtain required camshaft 11.
Stop the liquid pressing in central siphon, and the hydraulic coupling in central siphon is shed, make central siphon, locating ring and cam unit generation elastic recovery, because the ratio of the elastic modelling quantity of central siphon and the elastic modelling quantity of locating ring is greater than the flow stress of central siphon and the flow stress ratio of locating ring, the ratio of the elastic modelling quantity of the elastic modelling quantity of central siphon and cam unit is greater than the flow stress of central siphon and the flow stress ratio of cam unit, it is the elastic recovery amount that the elastic recovery amount of locating ring and cam unit is all greater than central siphon, make central siphon, after locating ring and cam unit generation elastic recovery finish, cam unit and locating ring can not restore to the original state completely, retained part elastic module, cam unit and central siphon interference are fixedly linked, locating ring and central siphon interference are fixedly linked, obtain required camshaft 11, residual contact pressure between residual contact pressure between cam unit and central siphon and locating ring and central siphon makes this camshaft 11 can bear certain moment of torsion and pulling-out force, make camshaft 11 meet instructions for use.
The internal high pressure forming socketing method of the camshaft that the embodiment of the present invention provides, by adopting the method for interior pressing formation that cam unit and locating ring are fixed on central siphon, obtain required camshaft 11, compare with bonding method with existing hot charge practice, for the endoporus of cam unit and locating ring, the external diameter requirement on machining accuracy of central siphon is lower; Compare with existing key connection method, without keyway is set on central siphon, thereby reduced manufacturing procedure, reduced production process, and then improved the production efficiency of camshaft 11.
Simultaneously, the internal high pressure forming socketing method of the camshaft that the embodiment of the present invention provides, all cam unit are fixed on central siphon together with locating ring, same camshaft 11 is without being repeatedly socketed, be that camshaft 11 one pieces complete socket, simplify the production process of camshaft 11, and then improved the production efficiency of camshaft 11.
Simultaneously, the internal high pressure forming socketing method of the camshaft that the embodiment of the present invention provides, camshaft 11 one pieces complete socket, control the phase angle of camshaft 11 by camshaft mould, can control preferably the phase angle of camshaft 11, and then improve the moment of torsion reliability of camshaft 11; And the cost of camshaft mould is lower, to compare with the equipment that existing key connection method is required, equipment manufacturing cost is lower, has reduced the production cost of camshaft 11.
In the internal high pressure forming socketing method of the camshaft that above-described embodiment provides, central siphon is just in time identical with the length of camshaft mould, for the ease of inject highly pressurised liquid in central siphon, preferentially select central siphon overhanging in camshaft mould, from the external part of central siphon, in central siphon, inject highly pressurised liquid.
To injecting highly pressurised liquid in central siphon, there is various ways, in the internal high pressure forming socketing method of the camshaft that above-described embodiment provides, preferentially adopt plunger mechanism that the liquid in cylinder body 2 is injected to central siphon inner.Plunger mechanism range of application is wider, and cost is lower, and buys conveniently.Certainly, can adopt miscellaneous part to realize yet highly pressurised liquid is injected to central siphon, the present invention does not do this particularly and limits.
The internal high pressure forming socketing method of the camshaft providing based on above-described embodiment, the present invention also provides a kind of internal high pressure forming sleeve joint device of camshaft, and this sleeve joint device comprises: workbench 14; Be arranged at the camshaft mould on workbench 14; Be arranged at the slide block 7 at camshaft mould top; Be arranged on camshaft mould outside, and the cylinder body 2 being connected with the central siphon of camshaft 11, in cylinder body 2, store liquid; Can all be connected with the two ends of central siphon, and for the high-voltage power supply to central siphon internal pressurization, high-voltage power supply is provided with for controlling the controller of moulding pressure.
In the internal high pressure forming sleeve joint device of the camshaft that above-described embodiment provides, for stablizing of cylinder body 2, generally adopt cylinder rack 1 to support cylinder body 2, the present invention does not do restriction particularly for concrete shape and the structure of cylinder rack 1.
In the internal high pressure forming sleeve joint device of the camshaft that above-described embodiment provides, camshaft mould is determined according to the structure of required camshaft 11, and the present invention does not do particularly and limits camshaft mould concrete shape.Camshaft mould has various ways, and preferred, camshaft mould comprises: lower module 12 and the upper module 9 being connected with lower module 12 sealings, form the die cavity matching with camshaft 11 between upper module 9 and lower module 12; Be arranged on workbench 14, for installing upper bolster 8 and the die shoe 13 of module 9 and lower module 12.Upper bolster 8 is for supporting upper module 9, and die shoe 13, for supporting lower module 12, is convenient to the installation of this camshaft mould.Upper bolster 8 is connected with various ways with upper module 9 and die shoe 13 with lower module 12, preferentially selects, and upper bolster 8 is fixedly linked by positioning key 10 respectively with lower module 12 with upper module 9, die shoe 13.Certainly can be fixedly linked by alignment pin, the present invention does not do this particularly and limits yet.
For the ease of filling liquid in central siphon, in the internal high pressure forming sleeve joint device of the camshaft that above-described embodiment provides, the number of cylinder body 2 is specially two, is relatively arranged on the both sides of camshaft mould.Other relevant devices also change according to the number of cylinder body 2, like this, from the two ends of central siphon difference filling liquid, are convenient to liquid and fill with central siphon, have also accelerated production.
In the internal high pressure forming sleeve joint device of the camshaft that above-described embodiment provides, high-voltage power supply has various ways, preferred, high-voltage power supply is booster pump, by booster pump, to the liquid pressing in central siphon, can valve be set in the exit of booster pump, for regulating, increase the pressure of pump to liquid pressing.Certainly, high-voltage power supply also can be hydraulic cylinder, and the utility model is not done this particularly and limited.
In the internal high pressure forming sleeve joint device of the camshaft that above-described embodiment provides, cylinder body 2 is connected with central siphon and can be directly connected by pipeline, also can be connected by nozzle, and preferred, cylinder body 2 is connected with central siphon by plunger mechanism; Plunger mechanism comprises: the drift 6 being connected with the central siphon of camshaft 11, and for the punch holder 3 of punch support 6.The present invention does not do particularly and limits the mode that is connected of cylinder body 2 and central siphon.Drift 6 can directly be weldingly connected with punch holder 3, also can be connected by flange 5.For the ease of the installation of flange 5, be convenient to the fixing of drift 6, between flange 5 and punch holder 3, be provided with drift pressing plate 4.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (3)
1. an internal high pressure forming socketing method for camshaft, is characterized in that, comprising:
1) cam unit and locating ring are set on central siphon, form just body of camshaft;
2) the first body of described camshaft is put into camshaft mould, and by described camshaft mould matched moulds;
3) liquid in cylinder body (2) is injected in described central siphon;
4) by high-voltage power supply from the two ends of described central siphon to the liquid pressing in described central siphon, by the controller of high-voltage power supply, control the fluid pressure in described central siphon, make described central siphon generation plastic expansion until the outer wall of described central siphon and the inwall of described locating ring contact with the inwall of described cam unit, continuation is to the liquid pressing in described central siphon, make described locating ring and described cam unit generation strain, and the elastic recovery amount of described locating ring and described cam unit is all greater than the elastic recovery amount of described central siphon;
5) stop the liquid pressing in described central siphon, and shed the pressure of described axle liquid in pipe, described central siphon, described locating ring and described cam unit generation elastic recovery, obtain required camshaft (11).
2. the internal high pressure forming socketing method of camshaft according to claim 1, is characterized in that, described central siphon stretches in described camshaft mould outward.
3. according to the internal high pressure forming socketing method of the camshaft described in any one in claim 1-2, it is characterized in that, adopt plunger mechanism that the liquid in described cylinder body (2) is injected in described central siphon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210078263.5A CN102615202B (en) | 2012-03-22 | 2012-03-22 | Method for inner high-pressure forming coupling of camshaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210078263.5A CN102615202B (en) | 2012-03-22 | 2012-03-22 | Method for inner high-pressure forming coupling of camshaft |
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| Publication Number | Publication Date |
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| CN102615202A CN102615202A (en) | 2012-08-01 |
| CN102615202B true CN102615202B (en) | 2014-08-27 |
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| CN201210078263.5A Active CN102615202B (en) | 2012-03-22 | 2012-03-22 | Method for inner high-pressure forming coupling of camshaft |
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| CN105396961A (en) * | 2015-12-15 | 2016-03-16 | 重庆创力工贸有限公司 | Automobile seat angle adjuster and cam disc component riveting method |
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| US4660269A (en) * | 1985-05-21 | 1987-04-28 | Musashi Seimitsu Kogyo Kabushiki Kaisha | Process for producing built-up camshafts |
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| US5259268A (en) * | 1987-02-10 | 1993-11-09 | Gesenkschmiede Schneider Gmbh | Hollowshaft and method for the production thereof |
| CN1136339A (en) * | 1993-11-26 | 1996-11-20 | 内高压成型法有限及两合公司 | One-piece hollow camshaft and process for producing it |
| CN201848470U (en) * | 2010-10-20 | 2011-06-01 | 吉林省元隆达工装设备有限公司 | Internal high-pressure forming machine |
| CN202591440U (en) * | 2012-03-22 | 2012-12-12 | 吉林省元隆达工装设备有限公司 | Internal high-pressure forming sleeved-connection device for camshafts |
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2012
- 2012-03-22 CN CN201210078263.5A patent/CN102615202B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4660269A (en) * | 1985-05-21 | 1987-04-28 | Musashi Seimitsu Kogyo Kabushiki Kaisha | Process for producing built-up camshafts |
| US5259268A (en) * | 1987-02-10 | 1993-11-09 | Gesenkschmiede Schneider Gmbh | Hollowshaft and method for the production thereof |
| US5220727A (en) * | 1992-06-25 | 1993-06-22 | Hochstein Peter A | Method making cam shafts |
| CN1136339A (en) * | 1993-11-26 | 1996-11-20 | 内高压成型法有限及两合公司 | One-piece hollow camshaft and process for producing it |
| CN201848470U (en) * | 2010-10-20 | 2011-06-01 | 吉林省元隆达工装设备有限公司 | Internal high-pressure forming machine |
| CN202591440U (en) * | 2012-03-22 | 2012-12-12 | 吉林省元隆达工装设备有限公司 | Internal high-pressure forming sleeved-connection device for camshafts |
Non-Patent Citations (1)
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| 吴石林，等.Spherical—cymbal 换能器端帽自由胀形回弹预测与控制.《精密成形工程》.2010,第2卷(第4期), * |
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Effective date of registration: 20171211 Address after: 136600 Jilin Industrial Zone Baiquan Town Dongliao County in Liaoyuan Province Patentee after: JILIN ZHENGXUAN FRAME CO.,LTD. Address before: Liaoyuan City, Jilin province 136600 Baiquan Town Dongliao County Lian Chang village five groups Patentee before: JILIN YUANLONGDA TOOLING EQUIPMENT Co.,Ltd. |
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Denomination of invention: A Method of Inner High Pressure Forming and Socketing for Camshafts Effective date of registration: 20230925 Granted publication date: 20140827 Pledgee: Bank of China Limited Liaoyuan Branch Pledgor: JILIN ZHENGXUAN FRAME CO.,LTD. Registration number: Y2023220000097 |
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