CN206571541U - Engine assembly formula camshaft internal high pressure forming attachment structure - Google Patents
Engine assembly formula camshaft internal high pressure forming attachment structure Download PDFInfo
- Publication number
- CN206571541U CN206571541U CN201720260266.9U CN201720260266U CN206571541U CN 206571541 U CN206571541 U CN 206571541U CN 201720260266 U CN201720260266 U CN 201720260266U CN 206571541 U CN206571541 U CN 206571541U
- Authority
- CN
- China
- Prior art keywords
- cam
- mandrel
- high pressure
- pressure forming
- internal high
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a kind of engine assembly formula camshaft internal high pressure forming attachment structure, including mandrel and cam, cam endoporus is equidistant profile or log spiral, mandrel outer surface is set to occur bulging by injecting highly pressurised liquid to mandrel, mandrel outer surface is mutually extruded with cam bore area and is closely connected.Using the utility model proposes technical scheme in assembled cam shaft internal high pressure forming connection procedure, material is deformed and structure stress distribution is uniform, when assembled cam shaft is in running order, larger service load can be transmitted, the bonding strength of assembled cam shaft is effectively improved, so as to improve engine overall performance.
Description
Technical field
The utility model is related in engine cam technical field, more particularly to a kind of engine assembly formula camshaft high
Pressing formation attachment structure, including mandrel and cam.
Background technology
Camshaft is the critical component of regulation and control air inlet and exhaust in engine, mainly by mandrel, cam and axle journal part group
Into.Traditional camshaft takes monoblock cast or forging method to manufacture, and is integral type structure, there is power consumption height, stock utilization
The problems such as low and low production efficiency.Assembled cam shaft technology manufactures the parts separate machined of camshaft, takes full advantage of
Each component materials performance advantage, with structure distribution rationally, lightweight and the low advantage of processing cost.Internal high pressure forming connects skill
Art connects manufacturing technology as a kind of advanced, special, accurate assembled cam shaft, with cost is low, process is few, quality
Gently, the features such as rigidity is high, is widely used in engine assembly formula camshaft manufacturing technology, common engine assembly formula is convex
Wheel shaft structure has three kinds of circular configuration, tooth slot structure and peach-shaped structure, they the characteristics of it is as follows：
1st, circular configuration：Cam endoporus and mandrel outer wall are circle, simple in construction and easy to connect, but cam and mandrel
The ability that load is transmitted after connection is poor.
2nd, tooth slot structure：Mandrel outer wall edging shaping trench decorative pattern, cam endoporus whether be processed into channel form according to cam with
Depending on the hardness relation of mandrel material.The structure has certain assembly precision and bonding strength.But its be not suitable for inner high voltage into
Shape Joining Technology, and it is obvious in toothed area stress concentration phenomenon.
3rd, peach-shaped structure：Mandrel outer wall is circle, and cam endoporus is processed into arc section and projection with mandrel shape adaptation
Section, forms the protruding block similar to key after connection.The structure is connected suitable for internal high pressure forming, but in assembled cam shaft shaping
In connection procedure, mandrel material deforms uneven, the service load significantly greater than remainder born in high spot mandrel material
Material, cause cam endoporus discontinuity in the course of the work, be also easy to produce impact.
There is stress concentration, material deformation and discontinuity or inapplicable interior with mandrel attachment structure in above-mentioned three kinds of cams
The problems such as high-pressure forming technique.
Utility model content
For above-mentioned prior art, the technical problems to be solved in the utility model is to provide one kind, and can to solve assembled convex
In wheel shaft internal high pressure forming connection procedure, material deformation and structure stress distribution are uneven, and when assembled cam shaft is in
During working condition, larger service load can be transmitted, the bonding strength of assembled cam shaft is effectively improved, so as to improve engine
The attachment structure of overall performance.
In order to solve the above technical problems, the technical scheme that the utility model is provided is：A kind of engine assembly formula camshaft
Internal high pressure forming attachment structure, including mandrel and cam, the cam endoporus are equidistant profile or log spiral, by core
Axle injection highly pressurised liquid makes mandrel outer surface occur bulging, and mandrel outer surface is mutually extruded with cam bore area and closely connected
Connect.
The cam endoporus is equidistant profile, is made up of single function curve, and the cycle is 120 degree, the shape in coordinate system
Cheng Sanye ledges, its functional relation is：
In above formula,αFor the angulation in a coordinate system of certain point on function curve,D iFor interior envelope circular diameter,eTo be inclined
Away from,eMeet minimum profile curvature radiusρ min = (D e/2) – 8e>=0, D eFor cam endoporus circle diameter.
Preferably, in above-mentioned functional relation, offset distanceeValue is 0 between 0.8mm.
The cam endoporus is log spiral, by three curved sectionsAB、CDWithEF, and three straightwaysBC、DEWithFAIt is composited, curved sectionCDWithEFRespectively curved sectionABAround the 120 degree and 240 degree formation of central point O rotate counterclockwises, at this
Three straightways are connected and composed between three curved sections with straight lineBC、DEWithFA, the cycle is 120 degree, and three are formed in coordinate system
Leaf ledge, wherein curved section AB functional relation is：
In above formula,βFor helical angle, e is natural Exponents, and its value is 2.71828,α 1For curved sectionABIn a coordinate system institute into
Angle.
Preferably, in above-mentioned functional relation, helical angleβIt is worth between 86 degree to 90 degree,α 1Value 90 degree to 110 degree it
Between.
The assembled cam shaft inner high voltage attachment structure that the utility model is provided realizes connection by the following method：
The first step, machining cam and axle journal, cam profile are molded line, and endoporus is equidistant profile or log spiral, axle journal
Similar cylindrical sleeves；
Second step, cam, axle journal and centring ring are put into mold cavity, are inserted into outside mandrel central siphon, mandrel central siphon
There is primary clearance in wall, with other parts endoporus in order to bulging connection below；
3rd step, by matched moulds, fixes the position of each part；
4th step, is sealed to mandrel pipe end, and continuous high-pressure liquid is then passed through into pipe, under its effect, mandrel
Generation bulging, mandrel diminishes with other parts primary clearance until disappearing, and then realization is connected；
5th step, unloads hydraulic coupling, molds pickup.
It is using the beneficial effect of the technical solution of the utility model：
（1）In assembled cam shaft internal high pressure forming connection procedure, the contour curve of cam endoporus is more smooth so that
The deformation of mandrel material is uniform, improves the forming property of mandrel, and after internal high pressure forming connection, the stress distribution of attachment structure is uniform,
Stress concentration phenomenon is effectively improved；
（2）When assembled cam shaft is in running order, attachment structure has three leaf ledges, can transmit larger work
Make load, so as to effectively improve the bonding strength of assembled cam shaft.
Brief description of the drawings
Fig. 1 internal high pressure forming attachment structure part drawings of the present utility model；
Fig. 2 is internal high pressure forming catenation principle figure of the present utility model；
Fig. 3 is equidistant profile cam schematic diagram of the present utility model；
Fig. 4 is logarithmic spiral line cam schematic diagram of the present utility model；
Fig. 5 is core shaft structure schematic diagram of the present utility model；
Fig. 6 is mandrel and equidistant profile cam schematic diagram in shaping connection procedure of the present utility model；
Fig. 7 is mandrel and logarithmic spiral line cam schematic diagram in shaping connection procedure of the present utility model；
Fig. 8 is mandrel and equidistant profile cam schematic diagram after shaping connection of the present utility model；
Fig. 9 is mandrel and logarithmic spiral line cam schematic diagram after shaping connection of the present utility model.
In accompanying drawing：1. the mandrel of 2. centring ring of cam, 3. axle journal 4.PHydraulic coupling.
Embodiment
The utility model is further described with reference to the accompanying drawings and examples.Explanation for embodiment is used to help
Assistant solves the utility model, but does not constitute to restriction of the present utility model.
It is internal high pressure forming attachment structure part of the present utility model and operation principle as shown in Figure 1 and Figure 2.
As shown in Figure 6, Figure 7, the utility model is related to cam 1 and mandrel 4, and cam endoporus has equidistant profile and logarithmic spiral
Two kinds of structure choices of line, as shown in Figure 3 and Figure 4.
Embodiment：
The present embodiment realizes the connection of assembled cam shaft mandrel and cam by inside high-pressure forming method., will before bulging
Cam 1 fixes good position, and mandrel 4 is inserted.Before highly pressurised liquid is passed through into mandrel 4, first the pipe end of mandrel 4 is entered
Row sealing.Then under highly pressurised liquid effect bulging occurs for mandrel 4, realizes and initially contacts until mandrel 4 and cam 2, such as Fig. 6 and
Shown in Fig. 7.Now, the contact area very little of cam 1 and mandrel 4, most of region still has gap, and in three leaf protuberances
Subdivided gap is maximum.Continue to pressurize, the contact area of mandrel 4 and cam 1 increases.With hydraulic couplingPFurther increase until reaching
Elastic deformation occurs in the maximum pressure value of bulging equipment setting, the endoporus of cam 1 in this course.With hydraulic couplingPUnload
Carry, elastic recovery occurs for its endoporus, plastic resilience occurs for the outer wall of mandrel 4.Because the modulus of elasticity of the material of cam 1 is less than mandrel
4 materials, so in uninstall process, it is easier occur resilience.Finally, when the endoporus of cam 1 is relatively initial, it there occurs certain
The elastic deformation of amount, the outer wall of itself and mandrel 4, which is realized, to be brought into close contact, it is ensured that reliable quality of connection, as shown in Figure 8 and Figure 9.
The utility model is explained in detail above in association with drawings and examples, but the utility model is not limited to institute
The embodiment of description, to those of ordinary skill in the art, without departing from the concept of the premise utility, also
Some simple deduction or replace can be made, protection domain of the present utility model should be all considered as belonging to.
Claims (5)
1. a kind of engine assembly formula camshaft internal high pressure forming attachment structure, including mandrel and cam, it is characterised in that：It is described
Cam endoporus is equidistant profile or log spiral, mandrel outer surface is occurred bulging, core by injecting highly pressurised liquid to mandrel
Axle outer surface mutually extrudes with cam bore area and is closely connected.
2. engine assembly formula camshaft internal high pressure forming attachment structure according to claim 1, it is characterised in that：It is described
Cam endoporus is equidistant profile, is made up of single function curve, and the cycle is 120 degree, and three leaf protuberances are formed in coordinate system
Point, its functional relation is：
In above formula,αFor the angulation in a coordinate system of certain point on function curve,D iFor interior envelope circular diameter,eFor offset distance,eIt is full
Sufficient minimum profile curvature radiusρ min = (D e/2) – 8e>=0, D eFor cam endoporus circle diameter.
3. engine assembly formula camshaft internal high pressure forming attachment structure according to claim 2, it is characterised in that：It is described
Functional relation：
In above formula, offset distanceeValue is 0 between 0.8mm.
4. engine assembly formula camshaft internal high pressure forming attachment structure according to claim 1, it is characterised in that：It is described
Cam endoporus is log spiral, by three curved sectionsAB、CDWithEF, and three straightwaysBC、DEWithFAIt is composited, it is bent
Line segmentCDWithEFRespectively curved sectionABAround the formation of 120 degree and 240 degree of central point O rotate counterclockwises, this three curved sections it
Between three straightways are connected and composed with straight lineBC、DEWithFA, the cycle is 120 degree, and three leaf ledges are formed in coordinate system, its
Middle curved section AB functional relation is：
In above formula,βFor helical angle, e is natural Exponents, and its value is 2.71828,α 1For curved sectionABAngulation in a coordinate system.
5. engine assembly formula camshaft internal high pressure forming attachment structure according to claim 4, it is characterised in that：It is described
Functional relation：
In above formula, helical angleβIt is worth between 86 degree to 90 degree,α 1Value is between 90 degree to 110 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720260266.9U CN206571541U (en) | 2017-03-17 | 2017-03-17 | Engine assembly formula camshaft internal high pressure forming attachment structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720260266.9U CN206571541U (en) | 2017-03-17 | 2017-03-17 | Engine assembly formula camshaft internal high pressure forming attachment structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206571541U true CN206571541U (en) | 2017-10-20 |
Family
ID=60055396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720260266.9U Active CN206571541U (en) | 2017-03-17 | 2017-03-17 | Engine assembly formula camshaft internal high pressure forming attachment structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206571541U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106930794A (en) * | 2017-03-17 | 2017-07-07 | 桂林电子科技大学 | Engine assembly formula camshaft internal high pressure forming attachment structure |
| CN109798161A (en) * | 2019-01-28 | 2019-05-24 | 桂林电子科技大学 | A kind of prediction technique of the Hydraulic expansion-jointing assembled cam shaft bonding strength based on energy balance |
| CN109848315A (en) * | 2019-03-01 | 2019-06-07 | 西格迈股份有限公司 | The split type moulding stamper and forming method of special-shaped surge drum |
-
2017
- 2017-03-17 CN CN201720260266.9U patent/CN206571541U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106930794A (en) * | 2017-03-17 | 2017-07-07 | 桂林电子科技大学 | Engine assembly formula camshaft internal high pressure forming attachment structure |
| CN109798161A (en) * | 2019-01-28 | 2019-05-24 | 桂林电子科技大学 | A kind of prediction technique of the Hydraulic expansion-jointing assembled cam shaft bonding strength based on energy balance |
| CN109798161B (en) * | 2019-01-28 | 2020-10-02 | 桂林电子科技大学 | Hydraulic expansion joint assembly type camshaft connection strength prediction method based on energy balance |
| CN109848315A (en) * | 2019-03-01 | 2019-06-07 | 西格迈股份有限公司 | The split type moulding stamper and forming method of special-shaped surge drum |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206571541U (en) | Engine assembly formula camshaft internal high pressure forming attachment structure | |
| CN108757452B (en) | Tooth type of high-pressure ratio double-screw compressor rotor | |
| CN103939333B (en) | A kind of inside gearing pump with radial compensation | |
| CN103032312B (en) | Combined screw rod and formation technique | |
| CN207043299U (en) | Multiple-piece centrifugal casting flange mould | |
| CN106930794A (en) | Engine assembly formula camshaft internal high pressure forming attachment structure | |
| CN202165325U (en) | Pump cover assembling structure of automobile washing pump | |
| CN201739169U (en) | Novel type single screw pump | |
| CN208252440U (en) | A kind of diffuser blank with welded large-scale vertical pump | |
| CN102418701B (en) | Star wheel member and single screw compressor with same | |
| CN205534124U (en) | Tensioning wheel | |
| CN203650819U (en) | Machining mould for air intake manifold rubber nylon valve block of engine | |
| CN110685906B (en) | Roots pump rotor and roots pump | |
| CN210715102U (en) | Multiple shell fragment formula slider mechanism of preventing leaking | |
| CN102873119A (en) | Drawing die for rectangular flat steel tube | |
| CN210208495U (en) | Connecting structure between forging die structural members | |
| CN110005609B (en) | Smooth rotor profile of double-screw vacuum pump and design method thereof | |
| CN106593546A (en) | Turbine low-pressure steam admission mode and equipment | |
| CN100529423C (en) | Turbine fan and its manufacturing method | |
| CN201599065U (en) | Low-voltage end-stage moving blade with bone-shaped shroud ring and dummy club tiepiece for supercritical steam turbine | |
| CN1904365B (en) | Designing method of claw type rotor | |
| CN216665902U (en) | Novel inner rotor and outer rotor structure of rotor pump | |
| CN201412356Y (en) | Centrifugal water pump | |
| CN201432027Y (en) | Cooling water pipe bending mould for cooling wall of blast furnace | |
| CN216788803U (en) | Stamping and welding formed centrifugal pump shell convenient to process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |