CN102615202A - Method and device for inner high-pressure forming coupling of camshaft - Google Patents
Method and device for inner high-pressure forming coupling of camshaft Download PDFInfo
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- CN102615202A CN102615202A CN2012100782635A CN201210078263A CN102615202A CN 102615202 A CN102615202 A CN 102615202A CN 2012100782635 A CN2012100782635 A CN 2012100782635A CN 201210078263 A CN201210078263 A CN 201210078263A CN 102615202 A CN102615202 A CN 102615202A
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- camshaft
- central siphon
- pressure forming
- high pressure
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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 and device thereof of camshaft.
Background technology
Camshaft is mainly used in engine, and its effect is the unlatching and the closed action of control valve.Because the valve motion rule is related to the power and the service performance of an engine, so camshaft is one of vitals of engine.
At present, camshaft mainly adopts fabricated structure, and the camshaft that whole difficulty of processing is big is decomposed into processing and is relatively easy to cam unit and central siphon, through diverse ways cam unit and central siphon is coupled together the formation camshaft again.According to the difference of method of attachment, the knockdown manufacturing approach of camshaft is mainly hot charge practice, bonding method or key connection method.
But; Hot charge practice and bonding method require strict to the fit-up gap of camshaft; For example the endoporus of central siphon, locating ring and cam unit endoporus need accurately processing; Make that the manufacturing procedure of central siphon, locating ring and cam unit is complicated, the manufacturing time of camshaft is longer, causes the production efficiency of camshaft lower; The manufacturing process of key connection method is also complicated, need on central siphon, mill out keyway, makes that the manufacturing procedure of camshaft is 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 make up 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 that the production process of camshaft is more loaded down with trivial details; Production process is more, finally causes the production efficiency of camshaft lower.
In addition, use the hot joining method in the process of combined camshaft, the phase angle of camshaft is wayward, causes the moment of torsion reliability of camshaft lower; Simultaneously, the equipment manufacturing cost of key connection method needs is higher.
In sum, how simplifying the production process of camshaft, and then improve the production efficiency of camshaft, is present 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 present invention provides following technical scheme:
A kind of internal high pressure forming socketing method of camshaft comprises:
1) cam unit and locating ring are set on the central siphon, form camshaft body just;
2) the first body of said camshaft is put into the camshaft mould, and with said camshaft mould matched moulds;
3) liquid in the cylinder body is injected in the said central siphon;
4) liquid in the said central siphon is pressurizeed from the two ends of said central siphon through high-voltage power supply; Control the fluid pressure in the said central siphon through the controller of high-voltage power supply; Said central siphon generation plastic expansion is contacted with the inwall of said locating ring and the inwall of said cam unit until the outer wall of said central siphon; Continuation is to the liquid in said central siphon pressurization, makes said locating ring and said cam unit generation strain;
5) stop the pressurization of the liquid in the said central siphon, and shed the pressure of liquid in the said central siphon, said central siphon, said locating ring and said cam unit generation elastic recovery promptly obtain required camshaft.
Preferably, in the internal high pressure forming socketing method of above-mentioned camshaft, said central siphon is stretched in said camshaft mould outward.
Preferably, in the internal high pressure forming socketing method of above-mentioned camshaft, it is inner to adopt plunger mechanism that the liquid in the said cylinder body is injected said central siphon.
Based on the internal high pressure forming socketing method of the above-mentioned camshaft that provides, the present invention also provides a kind of internal high pressure forming sleeve joint device of camshaft, and this internal high pressure forming sleeve joint device comprises:
Workbench;
Be arranged at the camshaft mould on the said workbench;
Be arranged at the slide block of said camshaft mold top;
It is outside to be arranged on said camshaft mould, and the cylinder body that is connected with the central siphon of said camshaft, stores liquid in the said cylinder body;
Can all be connected with the two ends of said central siphon, and be used for the high-voltage power supply to said central siphon internal pressurization, said high-voltage power supply is provided with the controller that is used to control moulding pressure.
Preferably, in the internal high pressure forming sleeve joint device of above-mentioned camshaft, said camshaft mould comprises: lower module and the upper module that links to each other with said lower module sealing form the die cavity that matches with said camshaft between said upper module and the said lower module;
Be arranged on the said workbench, be used to install the upper bolster and the die shoe of said upper module and said lower module.
Preferably, in the internal high pressure forming sleeve joint device of above-mentioned camshaft, said upper bolster and said upper module and said die shoe and said lower module are fixedly linked through positioning key respectively.
Preferably, in the internal high pressure forming sleeve joint device of above-mentioned camshaft, the number of said cylinder body is specially two, is relatively arranged on the both sides of said camshaft mould.
Preferably, in the internal high pressure forming sleeve joint device of above-mentioned camshaft, said high-voltage power supply is a booster pump, and controller is the valve that is arranged on the booster pump outlet.
Preferably, in the internal high pressure forming sleeve joint device of above-mentioned camshaft, said cylinder body links to each other with said central siphon through plunger mechanism; Said plunger mechanism comprises: the punch holder that is provided with through hole and the drift that is connected with said central siphon and is used to support said drift.
Preferably, in the internal high pressure forming sleeve joint device of above-mentioned camshaft, said drift links to each other through flange with said punch holder.
The internal high pressure forming socketing method of camshaft provided by the invention; Adopt the camshaft mould; Method through internal high pressure forming is fixed on cam unit and locating ring on the central siphon; Obtain required camshaft, compare with bonding method with existing hot charge practice, lower for the external diameter requirement on machining accuracy of the endoporus of cam unit and locating ring, central siphon; Compare with existing key connection method, need not keyway is set on central siphon, thereby reduced manufacturing procedure, promptly 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 and locating ring are fixed on the central siphon together, and same camshaft need not carrying out repeatedly socket, and promptly the camshaft one piece is accomplished socket; Simplify the production process of camshaft, and then improved the production efficiency of camshaft.
Simultaneously, the present invention provides the internal high pressure forming socketing method of camshaft, and the camshaft one piece is accomplished socket, controls the phase angle of camshaft through the camshaft mould, can control the phase angle of camshaft preferably, and then improve the moment of torsion reliability of camshaft; And the cost of camshaft mould is lower, and with the required apparatus in comparison of existing key connection method, equipment manufacturing cost is lower, has reduced the production cost of camshaft.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The schematic flow sheet of the internal high pressure forming socketing method of the camshaft that Fig. 1 provides for the embodiment of the 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 invention.
Among last Fig. 1-2:
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.
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
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 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 invention.
The internal high pressure forming socketing method of the camshaft that the embodiment of the invention provides comprises:
Step S01: cam unit and locating ring are set on the central siphon, form camshaft body just;
Camshaft 11 comprises: central siphon is set in the cam unit on the central siphon and is used for the locating ring to cam unit axial limiting.Respectively ready cam unit and locating ring are set on the central siphon, form camshaft body just, at this moment, cam unit and locating ring are not fixedly linked with central siphon, and cam unit and locating ring are respectively and reserve primary clearance between the central siphon.
Step S02: the first body of camshaft is put into the camshaft mould, and with camshaft mould matched moulds;
The first body of camshaft is put into the camshaft mould that matches with the first body of this camshaft; By the internal structure restriction cam unit of camshaft mould and the axial displacement of locating ring; With this camshaft mould matched moulds, the general clamping pressure machine that adopts carries out matched moulds in the matched moulds process then.
Step S03: the liquid in the cylinder body 2 is injected in the central siphon;
Outer setting at the camshaft mould has cylinder body 2, stores liquid in this cylinder body 2, and this liquid is injected in the central siphon.Liquid in the cylinder body 2 can be lubricating oil, and the present invention does not do concrete qualification to the liquid in the cylinder body 2.
Step S04: pressurizeing to the liquid in the central siphon in the two ends from central siphon, regulates the fluid pressure in the central siphon, makes central siphon, locating ring and cam unit that strain all take place;
Liquid in the central siphon is pressurizeed from the two ends of central siphon through high-voltage power supply; The size of the fluid pressure in the central siphon is controlled, is regulated through the controller of high-voltage power supply; Central siphon generation plastic expansion is contacted with the inwall of locating ring and the inwall of cam unit until the outer wall of central siphon; Continuation is to the liquid in central siphon pressurization, makes locating ring and cam unit generation strain.
Step S05: stop the pressurization of the liquid in the central siphon, and shed the hydraulic coupling in the central siphon, central siphon, locating ring and cam unit generation elastic recovery promptly obtain required camshaft 11.
Stop the liquid in the central siphon is pressurizeed; And the hydraulic coupling in the central siphon shed; Make central siphon, locating ring and cam unit generation elastic recovery; Because the ratio of the elastic modelling quantity of the elastic modelling quantity of central siphon and 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, and promptly the elastic recovery amount of locating ring and cam unit is all greater than the elastic recovery amount of central siphon; After making that central siphon, locating ring and cam unit generation elastic recovery finish; Cam unit and locating ring can not restore to the original state fully, have kept the part elastic module, make cam unit and central siphon interference be fixedly linked; Locating ring and central siphon interference are fixedly linked; Promptly obtain required camshaft 11, the residual contact pressure between residual contact pressure between cam unit and the central siphon and locating ring and the central siphon makes this camshaft 11 can bear certain moment of torsion and pulling-out force, makes camshaft 11 satisfy instructions for use.
The internal high pressure forming socketing method of the camshaft that the embodiment of the invention provides; Method through being pressed into shape in adopting is fixed on cam unit and locating ring on the central siphon; Obtain required camshaft 11; Compare with bonding method with existing hot charge practice, lower for the external diameter requirement on machining accuracy of the endoporus of cam unit and locating ring, central siphon; Compare with existing key connection method, need not keyway is set on central siphon, thereby reduced manufacturing procedure, promptly 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 invention provides; All cam unit and locating ring are fixed on the central siphon together, and same camshaft 11 need not carrying out repeatedly socket, and promptly camshaft 11 one pieces are accomplished 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 invention provides, camshaft 11 one pieces are accomplished socket, control the phase angle of camshaft 11 through the camshaft mould; Can control the phase angle of camshaft 11 preferably, and then improve the moment of torsion reliability of camshaft 11; And the cost of camshaft mould is lower, and with the required apparatus in comparison of existing key connection method, 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 the foregoing description provides; The central siphon just in time length with the camshaft mould is identical; For the ease of in central siphon, injecting highly pressurised liquid, preferentially select central siphon overhanging in the camshaft mould, in central siphon, inject highly pressurised liquid from the external part of central siphon.
In central siphon, injecting highly pressurised liquid has multiple mode, and in the internal high pressure forming socketing method of the camshaft that the foregoing description provides, it is inner preferentially to adopt plunger mechanism that the liquid in the cylinder body 2 is injected central siphon.The plunger mechanism range of application is wider, and cost is lower, and buys conveniently.Certainly, can adopt miscellaneous part to realize highly pressurised liquid is injected central siphon, the present invention does not do this particularly and limits yet.
The internal high pressure forming socketing method of the camshaft that provides based on the foregoing description, 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 the workbench 14; Be arranged at the slide block 7 of camshaft mold top; It is outside to be arranged on the camshaft mould, and the cylinder body 2 that is connected with the central siphon of camshaft 11, stores liquid in the cylinder body 2; Can all be connected with the two ends of central siphon, and be used for the high-voltage power supply to the central siphon internal pressurization, high-voltage power supply is provided with the controller that is used to control moulding pressure.
In the internal high pressure forming sleeve joint device of the camshaft that the foregoing description provides, for stablizing of cylinder body 2, generally adopt cylinder rack 1 to support cylinder body 2, the present invention does not do qualification particularly for the concrete shape and the structure of cylinder rack 1.
In the internal high pressure forming sleeve joint device of the camshaft that the foregoing description provides, the camshaft mould is decided according to the structure of required camshaft 11, and the present invention does not do particularly the concrete shape of camshaft mould and limits.The camshaft mould has various ways, and preferred, the camshaft mould comprises: lower module 12 and the upper module 9 that links to each other with lower module 12 sealings form the die cavity that matches with camshaft 11 between upper module 9 and the lower module 12; Be arranged on the workbench 14, be used to install the upper bolster 8 and die shoe 13 of module 9 and lower module 12.Upper bolster 8 is used to support upper module 9, and die shoe 13 is used to support lower module 12, is convenient to the installation of this camshaft mould.Upper bolster 8 is connected with multiple mode with upper module 9 and die shoe 13 with lower module 12, the preferential selection, and upper bolster 8 is fixedly linked through positioning key 10 respectively with lower module 12 with upper module 9, die shoe 13.Certainly can be fixedly linked through alignment pin, the present invention does not do this particularly and limits yet.
For the ease of in central siphon, injecting liquid, in the internal high pressure forming sleeve joint device of the camshaft that the foregoing description 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, inject liquid respectively from the two ends of central siphon, 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 the foregoing description provides, high-voltage power supply has various ways, and is preferred; High-voltage power supply is a booster pump; To the pressurization of the liquid in the central siphon, can valve be set through booster pump, be used to regulate the pressure of increase pump the liquid pressurization in the exit of booster pump.Certainly, high-voltage power supply also can be hydraulic cylinder, and the present invention does not do this particularly and limits.
In the internal high pressure forming sleeve joint device of the camshaft that the foregoing description provides, cylinder body 2 links to each other with central siphon and can directly link to each other through pipeline, also can link to each other through nozzle, and preferred, cylinder body 2 links to each other with central siphon through plunger mechanism; Plunger mechanism comprises: drift 6 that is connected with the central siphon of camshaft 11 and the punch holder 3 that is used for punch support 6.The present invention does not do particularly the mode that links to each other of cylinder body 2 and central siphon and limits.Drift 6 can directly be weldingly connected with punch holder 3, also can link to each other through 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.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (10)
1. the internal high pressure forming socketing method of a camshaft is characterized in that, comprising:
1) cam unit and locating ring are set on the central siphon, form camshaft body just;
2) the first body of said camshaft is put into the camshaft mould, and with said camshaft mould matched moulds;
3) liquid in the cylinder body (2) is injected in the said central siphon;
4) liquid in the said central siphon is pressurizeed from the two ends of said central siphon through said high-voltage power supply; Control the fluid pressure in the said central siphon through the controller of high-voltage power supply; Said central siphon generation plastic expansion is contacted with the inwall of said locating ring and the inwall of said cam unit until the outer wall of said central siphon; Continuation is to the liquid in said central siphon pressurization, makes said locating ring and said cam unit generation strain;
5) stop the pressurization of the liquid in the said central siphon, and shed the pressure of liquid in the said central siphon, said central siphon, said locating ring and said cam unit generation elastic recovery promptly obtain required camshaft (11).
2. the internal high pressure forming socketing method of camshaft according to claim 1 is characterized in that, said central siphon is stretched in said camshaft mould outward.
3. according to the internal high pressure forming socketing method of any described camshaft among the claim 1-2, it is characterized in that, adopt plunger mechanism that the liquid in the said cylinder body (2) is injected in the said central siphon.
4. the internal high pressure forming sleeve joint device of a camshaft is characterized in that, comprising:
Workbench (14);
Be arranged at the camshaft mould on the said workbench (14);
Be arranged at the slide block (7) of said camshaft mold top;
It is outside to be arranged on said camshaft mould, and the cylinder body (2) that is connected with the central siphon of said camshaft (11), and said cylinder body stores liquid in (2);
Can all be connected with the two ends of said central siphon, and be used for the high-voltage power supply to said central siphon internal pressurization, said high-voltage power supply is provided with the controller that is used to control moulding pressure.
5. the internal high pressure forming sleeve joint device of camshaft according to claim 4; It is characterized in that; Said camshaft mould comprises: lower module (12) and the upper module (9) that links to each other with said lower module (12) sealing form the die cavity that matches with said camshaft (11) between said upper module (9) and the said lower module (12);
Be arranged on the said workbench (14), be used to install the upper bolster (8) and the die shoe (13) of said upper module (9) and said lower module (12).
6. the internal high pressure forming sleeve joint device of camshaft according to claim 5 is characterized in that, said upper bolster (8) is fixedly linked through positioning key (10) respectively with said lower module (12) with said upper module (9) and said die shoe (13).
7. the internal high pressure forming sleeve joint device of camshaft according to claim 4 is characterized in that, the number of said cylinder body (2) is specially two, is relatively arranged on the both sides of said camshaft mould.
8. the internal high pressure forming sleeve joint device of camshaft according to claim 4 is characterized in that, said high-voltage power supply is a booster pump, and controller is the valve that is arranged on the booster pump outlet.
9. according to the internal high pressure forming sleeve joint device of any described camshaft among the claim 4-8, it is characterized in that said cylinder body (2) links to each other with said central siphon through plunger mechanism; Said plunger mechanism comprises: the drift that is provided with through hole and is connected with said central siphon (6) and be used to support the punch holder (3) of said drift (6).
10. the internal high pressure forming sleeve joint device of camshaft according to claim 9 is characterized in that, said drift (6) links to each other through flange (5) with said punch holder (3).
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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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| 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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| CN102615202A true CN102615202A (en) | 2012-08-01 |
| CN102615202B 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN102615202B (en) | 2014-08-27 |
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