CN87104854A - Camshaft and manufacture method thereof - Google Patents
Camshaft and manufacture method thereof Download PDFInfo
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- CN87104854A CN87104854A CN87104854.XA CN87104854A CN87104854A CN 87104854 A CN87104854 A CN 87104854A CN 87104854 A CN87104854 A CN 87104854A CN 87104854 A CN87104854 A CN 87104854A
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- cam ring
- axle
- cam
- camshaft
- cylindrical shaft
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/84—Making other particular articles other parts for engines, e.g. connecting-rods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/84—Making other particular articles other parts for engines, e.g. connecting-rods
- B21D53/845—Making camshafts
Abstract
A kind of camshaft that is used for internal-combustion engine is to make the tubular fabrication, by several initial circular cam rings are placed on the central cylindrical component, again the compacting distortion of the cam ring of the dies cavity that is placed on shaping jig to reach desired cam profile shape, apply hydraulic coupling by inner chamber then and cylindrical component radially expanded outward enter in the in type cam ring profile cylindrical component.Thus in type cam ring is fastened on the cylindrical component preventing and rotates each other and axial displacement.Outside adding, with cam ring when making desired cam profile shape, also might reach the degree that they are tightened together to cylindrical component with respect to the cam ring distortion, so that do not need to rely on again inner chamber to apply hydraulic coupling to cylindrical component.
Description
The present invention relates to a kind of tubular assembled cam shaft and be used for reciprocating piston machine, such as internal-combustion engine or compressor, wherein many camshaft elements are fastened on the central cylindrical component that passes them.These camshaft elements comprise several cams, can also comprise several bearings and gear etc.All these elements all are along axially spaced-apart and are fastened on this central authorities' cylindrical component.
Usually camshaft is to be made by foundry goods or forging, is generally Steel Work, and constitutes along the integral cam of its axially spaced-apart and a solid central member of bearing by having many.But, it has been recognized that when making cam, the method that the element of each separation is assembled has advantage, wherein each cam and bearing are shaped in advance according to its shape, install and be fastened on the central cylindrical shaft in predetermined position on the axial length according to it then.The barrel cam axle of Sheng Chaning is like this compared the advantage that is had with the integral cam shaft that casting or rough forging are made and is: weight reduction; Help and to be fed on each cam and the bearing surface in the cavity of oiling agent by axle; Can select the possibility of different materials to cam, bearing and axle for use.
For example, UK Patent Application GB-A-275842 file (Yassenoff's) instruction is crossed ready-made camshaft spare and bearing ring is welded to method on the central cylindrical shaft, just not saying central hole, cam can be an entity, also can be formed or is bent to desired cam profile shape with metal bar by stretching tube.UK Patent Application GB-A-1115093(GKN screw thread and fastening piece Co., Ltd) instruction crosses ready-made camshaft spare with the method for mechanical interlocking on central cylindrical shaft, this cam ring is actually a kind of cylindrical shell drawn of wall thickness that waits and is shaped to desired cam profile shape, and the tubular cutting next part that will stretch is then come promptly as other cam ring spare.In this specification, each cam ring is that mechanical interlocking is fixed on the axle axial position and angle direction location on request, and this location is to realize by a key that meshes in hollow nose of cam and the hole on the axial wall; Each cam ring can be optionally more further by bonding or soldering, brazing or be weldingly fixed on the axle.
UK Patent Application GB-A-1117816(GKB screw thread and fastening piece Co., Ltd) instruction crosses by axle radially is out of shape outward, the method that promptly meshes in the perforate of cam and bearing element is fixed on the central cylindrical shaft central authorities' prefabricated solid cam and bearing element with holes.According to instruction, the radially distortion outward of this axle is that the push rod by an interference size stretches to axle, perhaps axle is expanded realize by hydraulic pressure or explosive forming technology.The central hole of each cam or bearing is the radially outward fluting, so then forms an effective spline device, so that strengthen radially firm promptly the meshing between dilation and cam and the bearing outward of axle.
Japanese patent application JP-A-7644/1971 file (people such as Nakamura) was instructed ready-made cam ring is fastened on the central cylindrical shaft is axle radially to be expanded to outward in the cavity of each cam ring by hydraulic pressure to realize.Hydraulic pressure is (the other end of axle seals) that the end by cylindrical shaft applies, meanwhile, all to remain on respect to axle be in the mould of sealing of the axially spaced-apart be scheduled to and angle direction to the cam ring of Cheng Xinging in advance, this mould fluted corresponding to and hold the cam ring, the cam ring is on the desired position.
Being taught in the UK Patent Application GB-A-1530519 file (Klockner Hamboldt Deutz AG) in the Japanese patent application JP-A-7644/1971 file also has same content, wherein central cylindrical shaft can pass through hydraulic pressure, electricity hydraulic pressure can radially be expanded in the cavity of cam ring of ready-made first-class substantially wall thickness outward with mechanical device again.
The purpose of this invention is to provide a kind of method of making assembled cam shaft, with a kind of camshaft of making in this way, wherein, cam member is that hollow cam ring is fastened on the central cylindrical shaft, compares with known cam ring the mode on the central cylindrical shaft of being fastened on to have various advantages.
According to a first aspect of the present invention, a kind of method of making camshaft is provided, this camshaft has a central cylindrical shaft and several at interval cam ring vertically, it is characterized in that: this cam ring all is the ring of initial circular cross-section, and be installed in the forming tool compartment of terrain vertically around cylindrical shaft, then forming tool cuts out, so that make the cam ring of initial circular cross-section be pressed into desired cam profile shape, cylindrical shaft is out of shape with respect to the cam ring, thus cam ring is remained on the cylindrical shaft, to prevent to produce mutual axial and angular displacement.
Provide a kind of assembled cam shaft according to another aspect of the present invention, it comprises the cam ring that several are arranged along a central cylindrical shaft axially spaced-apart, wherein each cam ring remains on the axle, to prevent that it from carrying out axially and angular displacement on respect to the cooperation position of axle, this axle cam ring relatively is out of shape, the distortion with respect to the position of cam ring of above-mentioned axle, be when the cam ring is pressed shape according to the requirement of camshaft profile by initial circular cross-section shape and on being placed in without the suitable position of axle of distortion, adopt the method for machinery to finish.
Be to be understood that, this assembled cam shaft, and the method that is used to make it, described in two sections of fronts, different with any all methods of the prior art, its cam ring is by the wheel profile requirement of initial circular cross-section according to cam, around the axially spaced-apart of central cylindrical shaft to be scheduled to, only in a forming tool, suppress and form, in same pressing process, also finished the deformation process of axle, thus the cam ring has been remained on the axle, to prevent to take place each other axial and angular displacement with respect to the cam ring.The advantage of the uniqueness that provides according to the present invention is:
1. this initial circular cam ring is by cutting on the more cheap circular section tubing according to its predetermined axial dimension;
2. the circular cam ring can be placed on the central cylindrical shaft and carry out axially locating easily in the cam forming die of forming tool, and worked as this cam ring before being placed on the central cylindrical shaft, as in present technology, instructing, just require to be shaped in advance according to cam profile shape, like that will be to cam ring accurate location according to the relative position of cam profile shape in the cavity of mould before being fastened on the axle, bring more difficulty, no matter this fastening be by welding, carry out the radially dilatancy outward of axle by mechanical means, still carrying out the distortion of axle by hydraulic method, all is like this.
The distortion of the compacting of cam ring and axle can place cam ring under the ambient temperature with axle to be carried out.In addition, before settling initial circular cam ring around axle, can heat cam ring, in forming tool, carry out before the distortion of the compacting of cam ring and axle then, afterwards or in suppressing deformation process, cool off so that reach press fit to axle.
Can comprise that according to method of the present invention inner chamber to axle applies hydraulic coupling so that make cylindrical shaft produce a further additional step of distortion with respect to the cam ring.This to axle apply further distortion preferably in addition additional one have axially extended central cavity and have in the forming tool that holds many cam-shaped cavitys that axle and each cam ring cooperate respectively and carry out; The size of this cam-shaped cavity is greater than the outer profile size of cam ring, and when the inner chamber of axle applied hydraulic pressure, the cam ring was a resiliently deformable like this, and axle is plastic deformation.
Method of the present invention also comprises easily camshaft is heat-treated, so that the additional step that the cam ring is hardened.
This method can also comprise further the cam ring is fastened on additional step on the cylindrical shaft, this fastening be by soldering, brazing, thermal weld (gas, electric arc, laser or electron beam), cold welding, immersed solder, gummed, pinning, mechanical interlocking or any other suitable fixation method.This further locking method can realize easily in carrying out above-mentioned heat treatment process that these methods comprise that brass or the solder plate that will be placed in advance between axle and the cam ring melt.
Further feature of the present invention, the following explanation by carrying out in conjunction with the accompanying drawings by way of example will come into plain view, wherein:
Fig. 1 is the schematic perspective view that shows camshaft structure of the present invention;
Fig. 2 is the stereogram of camshaft one end shown in Figure 1, shows the distortion situation of central cylindrical shaft with respect to the cam ring in greater detail;
Fig. 3 is a longitudinal cross-section view that shows that part of camshaft shown in Figure 2;
Fig. 4 shows that a circular cam ring is looped around the position that is placed in a cam forming die in the forming tool on the central cylindrical shaft, is a transverse sectional view before forming tool cuts out;
Fig. 5 is the view similar to Fig. 4, but shows the forming tool closed position, thus initial circular cam ring is pressed into by the shape of cam profile shape requirement and has finished a deformation process with respect to the cam ring;
Fig. 6 is that a cam ring that has been shaped is installed in the axle that has been out of shape and goes up a similar transverse sectional view of (as shown in Figure 5), but it is to be placed in the cooperation mould of an additional forming tool to prepare applying hydraulic coupling to the inner chamber of axle;
Fig. 7 is placed in the similar transverse sectional view that is positioned at additional in addition forming tool on the strained axle with the cam ring that Fig. 8 shows to shown in 6 has been shaped, cooperation die cavity wherein is improved, improves the effect that hydraulic pressure puts on the inner chamber of axle by it.
At first referring to Fig. 1 to Fig. 3, show among the figure according to the produced camshaft of method of the present invention, in this is given an example, comprise a central cylindrical shaft 10, be installed with eight thereon according to the cam ring 12 of the predetermined profile formation of cam and the bearing neck 14 of five circular external frames; This cylindrical shaft is radially with respect to cam ring distortion, thus the cam ring remain on axle go up with prevent each other axially and angle be subjected to displacement.
Each cam ring 12 is remained on the device of axle on 10 as shown in Figure 4.Demonstrate a central cylindrical shaft 10 with uniform circular cross-section in Fig. 4, it can be made by low carbon steel easily, although it also can be made by the material of aluminum alloy or any other suitable plastically deformable.Also demonstrate the cam ring 12 of a circular cross-section among the figure and be the cam ring of wall thickness such as, its internal diameter is a bit larger tham the external diameter of cylindrical shaft; Scale off as one " section " on the tubing of cam ring by a uniform circular cross-section with certain-length.The steel that the Ductile Steel that can be hardened by the high strength that is easier to obtain in order to the material of the tubing that cuts cam ring or other are suitable for making cam provide.
Also demonstrate two parts 16 and 18 vis-a-vis of shaping instrument among Fig. 4, in two parts of this forming tool, contain cam forming die cavity 20 and 22 respectively; Cavity 20 is the shapes according to the requirement of cam profile shape, and cavity 22 is semicircular.
Make camshaft, need the circular cam ring 12 and the round bearing axle journal 14 of necessary amount are placed on the central cylindrical shaft 10, each cam ring and bearing journal are placed on respectively in the corresponding dies cavity 22.Then forming tool is closed to position shown in Figure 5, thus that each is initial circular cam ring 12 is pressed into the wheel profile that the shape that is limited by cam forming die tire inner chamber 22-22 forms cam.Meanwhile, central cylindrical shaft 10 carries out radial deformation with shape shown in Figure 5 basically in each hollow cam ring, thus, makes the cam ring all remain on axle and goes up to prevent to take place relatively axial and angular displacement.Be to be understood that each radial deformation part 24 of cylindrical shaft 10 can not be deformed to and accurately meet shape shown in Figure 6; For example, in the hollow lumen that each crushed element not exclusively is filled in its cam ring matches.The part 26 of axle is axially between each adjacent cam ring, perhaps between a cam ring and bearing journal, though one that all will remain in the forming tool is generally in the circular cooperation cavity, when cutting out, the shaping instrument stops distortion, but can see the most clearly at Fig. 3, cylindrical shaft still can be along at least a portion generation radially outward dilatancy of its circumference, so that occur the convex closure 28 that radially expands outward laterally in each of cam ring or bearing journal, so that provide an additional confining force, produce moving axially with respect to axle to prevent it to each corresponding cam ring or axle journal.
Mechanical compaction process recited above can all be under the room temperature at all elements of camshaft carries out, i.e. the manufacturing of this camshaft is finished by cold pressure procedure.In addition, circular cam ring that each is initial and bearing journal can be them before being placed on the central cylindrical shaft, heat,, or cool off before this, afterwards to obtain cam ring and bearing journal and be in press fit with respect to axle then through in the mechanical compaction process.In such layout, should be appreciated that at room temperature the initial circular cam ring and the internal diameter of bearing journal will be slightly smaller than the outside dimension of central cylindrical shaft.
The present invention also provides the addition method that strengthens cam ring and bearing journal confining force, takes place axially and angular displacement with respect to axle to prevent them.For example, though do not show among the figure, cam ring and bearing journal can be by solderings, brazing, hot weld (as gas, electric arc, laser or electron beam), cold welding, immersed solder, gummed, pinning, mechanical interlocking or further fastening by other suitable locking method.
In addition, the confining force of cam ring can be strengthened by using the inner chamber that hydraulic pressure puts on the central cylindrical shaft that places additional in addition forming tool.Referring to Fig. 6, two parts 30 and 32 vis-a-vis that demonstrate other additional forming tool among the figure have been closed, this forming tool has and holds the vallate mould cavity separately of each repressed cam ring respectively, but its inner cavity size will be a bit larger tham the overall sizes of cam ring.As shown in Figure 6, after mould two- part 30 and 32 are closed and when locking together, hydraulic coupling is put on the inner chamber of central cylindrical shaft, then the effect by hydraulic pressure is radially outwards expanded this axle thus.In the process that this radially outward expands, plastic deformation has taken place in cylindrical shaft 10, and resiliently deformable takes place cam ring 12, and this is because the inner cavity size of mould cavity 34-36 surpasses the overall sizes of cam ring, by this, make the cam ring produce limited radially outward resiliently deformable.After interior hydraulic pressure was discharged by the axle inner chamber, the cam ring that resiliently deformable then takes place will produce a contraction to the central cylindrical shaft through plastic deformation.
The size that should be appreciated that the cam ring mould cavity in this in addition additional forming tool must can not be too big, otherwise can make the expansion of cam ring 12 surpass its limit of elasticity in the process that central cylindrical shaft radially expands outward; Mould cavity is also necessary on the contrary can not be too little, otherwise the cam ring will not reach desired elastic deformation level.
If cam ring 12 is improved according to Fig. 7 or Fig. 8 with respect to each mould cavity 34-36 of the forming tool that the fastening force of axle 10 will add in addition, then can be further enhanced, wherein in Fig. 7 last, bed die two- part 30 and 32 in along on the width of whole cam ring, both sides at the opposing side of diameter all are provided with pad 38, and in Fig. 8, this pad is to cross the two-part separating surface of mould.When hydraulic pressure puts on the inner chamber of central cylindrical shaft 10, simultaneously when camshaft is placed in the forming tool shown in Fig. 7 or Fig. 8, initial the closing on the whole width of all cam rings 12 of mould compressed, cause the elongation of cam ring, apply hydraulic coupling followed by the inner chamber that is exactly axle 10, then this shaft distortion is to the cam type surface of strained elongation.When hydraulic coupling is loose, and after mould opened, each cam ring 12 just was fastened on three positions of the crushed element that matches with it 24 on the axle effectively, and it two is the both sides at nose of cam position, and another is in the bottom.An advantage of this improved manufacture method is: its not exclusively relies on the hydraulic coupling that puts on an inner chamber to produce the tighten up power of cam ring with respect to axle, but profile is full of in it by causing along the cam squeezing action of the width of whole cam when mould is closed.
In the above any method, each cam ring 12 all be by its initial circular section shape in mechanical molding's instrument, as shown in Figure 4, make the cam type surface of final requirement basically.No longer need afterwards the cam ring is carried out a large amount of machining, although sometimes can a spot of polishing processing.
In general, the heat treatment of carrying out certain form is more satisfactory, both can be local also can be whole, perhaps according to the position of selecting on each cam ring, or the batch heat treatment of whole camshaft.The heat treatment of this batch can be hardened the cam ring and central cylindrical shaft is not hardened, this is because due to its Chemical composition difference, their reaction is to quench and tempering like this, be to be understood that this batch heat treatment must radially the expanding outward of axle (as referring to Fig. 6 to shown in Figure 8) carry out before, otherwise the part in addition that this heat treatment will loosely assemble is so that reach the degree that cam ring 12 is got loose and from central cylindrical shaft 10.
In the batch heat treatment process, cam ring and central cylindrical shaft might be heated between 850 ℃ to 900 ℃, and described optional brazing and soldering step are very easily to finish further fastening process above under this temperature other part being carried out.For example, brazing process can be before beginning to carry out mechanical compaction, one deck brazing sheet metal is placed between cam ring and the central cylindrical shaft in advance realizes; Brazing metal just is melted in batch heat treatment, so just with cam ring (with the bearing journal that requires) brazing on central cylindrical shaft.
As mentioned above, initial mechanical compaction process makes those parts of central cylindrical shaft distortion be deformed into the position that is full of fully as shown in Figure 5, is not to be absolutely necessary.Similarly, hydraulic buckling process subsequently, as referring to Fig. 6 to situation shown in Figure 8, do not need again these parts of central cylindrical shaft to be deformed in the hollow lumen that enters each cam ring fully.If desired, can a packing material (not shown) be placed on as a steel bar each cam ring the nose of cam position below, then can further improve the rigidity at nose of cam position after becoming with convenient cam-shaped.
Should be appreciated that, making in the process of camshaft according to above-mentioned various embodiments of the present invention, several cam rings with initial circular section shape are spaced vertically, be placed on the central cylindrical shaft in the forming tool, the above-mentioned cam ring of each in forming tool place is provided with several cam forming die cavitys corresponding with it.Installation on the central cylindrical shaft of initial circular cross-section cam ring (with the round bearing axle journal) in forming tool can provide convenient largely exactly, wherein only is to be arranged on cam ring and bearing journal in separately the mould tire cavity; Need be before forming tool cut out, other part carries out accurate localization with respect to the angular orientation of central cylindrical shaft each.A major advantage of the present invention like this is: promptly cam ring itself is to have low manufacture cost, wherein it just cut next section by axially predetermined size from the more cheap circular section tubing simply or " a slice " just passable.
Claims (16)
1, a kind of manufacture method of camshaft, this camshaft has a central cylindrical shaft and several cam rings are arranged along its axially spaced-apart, it is characterized in that: cam ring is spaced apart vertically with initial circular cross section shape, and be looped around on the central cylindrical shaft in the forming tool and assemble, cam ring with each initial circular cross-section when the shaping instrument cuts out is pressed into desired cam profile shape, meanwhile cylindrical shaft deforms with respect to cam ring, thus cam ring is remained on axle and goes up to prevent to take place each other axial and angular displacement.
2, the method for claim 1 is characterized in that: the deformation process of the compacting of cam ring and axle all is that cam ring and axle are placed under the room temperature condition.
3, method as claimed in claim 1, it is characterized in that: the cam ring of initial circular cross-section will be heated before settling around axle, and in forming tool, carry out before the distortion of the compacting of cam ring and axle, afterwards or in the process of carrying out, cool off, so that reach the cam ring press fit between the axle relatively.
4, method as claimed in claim 1 is characterized in that: its cylindrical shaft is to apply with hydraulic pressure by the inner chamber with axle to realize with respect to the additional step of the further distortion of cam ring.
5, method as claimed in claim 4 is characterized in that: the further distortion of described axle is to realize in the other additional forming tool an of central chamber with an axial elongation and several cam ring cavitys (carrying out the cooperation of axle and cam ring therein respectively); The in-profile size of this cam ring inner chamber is greater than the overall sizes of cam ring, thus, when hydraulic coupling puts on the inner chamber of axle, cam ring generation resiliently deformable and plastic deformation takes place axle then.
6, as any one method of claim 2 to 5, it is characterized in that: apply that an additional step is to increase a heat treatment step so that cam ring is hardened on the cam.
7, as any one method of claim 1 to 6, it is characterized in that: the additional step that cam ring further is fastened on the cylindrical shaft is by brazing, hot weld (gas, electric arc, laser or electron beam), cold welding, immersed solder, gummed, pinning, mechanical interlocking or any other suitable locking method.
8, method as claimed in claim 7 (when right requires 7 dependent claims 6), it is characterized in that: described further fastening method realizes in above-mentioned heat treatment process, this method is that spelter solder or tin solder metal are placed between axle and the cam ring in advance, and melts realization in heat treatment process.
9, a kind of method of making camshaft is characterized in that it is according to top described and make with reference to any one accompanying drawing in the accompanying drawing basically.
10, a kind of assembled cam shaft, several cam rings have been comprised along central cylindrical shaft axially spaced-apart, it is characterized in that each cam ring wherein remains on the matching part on the axle, this above-mentioned position is through producing distortion with respect to the cam ring, to prevent that cam ring from taking place axially and angular displacement at the matching part of axle, this above-mentioned matching part is when being suppressed to finish in the process that reaches desired cam profile shape round the axle without distortion by initial circular cross-section cam ring with respect to the mechanically deformation that cam ring carried out.
11, as a kind of camshaft of claim 10, it is characterized in that wherein cam ring and axle at room temperature, carry out the distortion of the compacting of cam ring and axle.
12, as a kind of cam ring of claim 10, it is characterized in that wherein initial circular section shape cam ring heated before settling around axle, then before the distortion of the compacting of cam ring and axle, cool off afterwards or in the compacting deformation process, to reach the press fit of cam ring with respect to axle.
13, as a kind of camshaft of claim 10, it is characterized in that wherein said each relevant position through the axle of mechanically deformation, all to apply hydraulic pressure so that the distortion that its cam ring with matching relatively adds by inner chamber to axle.
14, as any one a kind of camshaft of claim 10 to 13, it is characterized in that wherein each cam ring is by brazing, hot weld (gas, electric arc, laser or the electricity bundle), cold welding, immersed solder, gummed, pinning, the position that is fastened to the axle that has been out of shape that mechanical interlocking or any other suitable locking method add again.
15, a kind of assembled cam shaft is characterized in that it is basically according to top described and make and settle with reference to any one accompanying drawing.
16, a kind of fabricated camshaft is characterized in that it is according to any one requires the manufacturing of described method in the claim 1 to 9.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8617052 | 1986-07-12 | ||
| GB868617052A GB8617052D0 (en) | 1986-07-12 | 1986-07-12 | Camshaft |
| GB8705385 | 1987-03-07 | ||
| GB878705385A GB8705385D0 (en) | 1987-03-07 | 1987-03-07 | Camshaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87104854A true CN87104854A (en) | 1988-01-27 |
| CN1009570B CN1009570B (en) | 1990-09-12 |
Family
ID=26291027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87104854A Expired CN1009570B (en) | 1986-07-12 | 1987-07-11 | Camshaft and method for its production |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0313565B1 (en) |
| JP (1) | JPH02501323A (en) |
| KR (1) | KR880701813A (en) |
| CN (1) | CN1009570B (en) |
| BR (1) | BR8707744A (en) |
| CA (1) | CA1289776C (en) |
| ES (1) | ES2007075A6 (en) |
| GB (1) | GB2211127B (en) |
| WO (1) | WO1988000643A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104918746A (en) * | 2012-08-29 | 2015-09-16 | 吉凯恩粉末冶金工程有限公司 | Method for producing a composite component, and composite component |
| CN105874227A (en) * | 2014-01-09 | 2016-08-17 | 恩普乐斯股份有限公司 | Injection molding shaft |
| CN106413980A (en) * | 2014-05-16 | 2017-02-15 | 蒂森克虏伯普利斯坦技术中心股份公司 | Method for producing a camshaft assembly |
| CN107530844A (en) * | 2015-04-17 | 2018-01-02 | 蒂森克虏伯普利斯坦技术中心股份公司 | Method for being positioned at cam shaft element in the shaft segment of camshaft |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0335945A4 (en) * | 1987-10-01 | 1990-02-05 | Husted Royce Hill | Camshafts and methods of making same. |
| DE3803685A1 (en) * | 1988-02-07 | 1989-08-17 | Emitec Emissionstechnologie | CAMSHAFT |
| DE3803683A1 (en) * | 1988-02-07 | 1989-08-17 | Emitec Emissionstechnologie | BUILT SHAFT, IN PARTICULAR CAMSHAFT, CRANKSHAFT OR GEAR SHAFT |
| DE4406754C2 (en) * | 1994-03-02 | 1998-11-19 | Emitec Emissionstechnologie | Multiple cams |
| WO1996027460A1 (en) * | 1995-03-06 | 1996-09-12 | Karl Mettler | Production of the cam with finished size by cold forming |
| DE19622372B4 (en) * | 1996-06-04 | 2006-06-01 | Htm Härtetechnik & Metallbearbeitung Gmbh | Method and device for producing camshafts |
| US6936119B2 (en) * | 2000-07-12 | 2005-08-30 | Mannesmannrohren-Werke Ag | Method for producing metallic, non-rotationally symmetrical rings with a constant wall thickness over their circumference |
| DE10234368C1 (en) * | 2002-07-27 | 2003-09-25 | Daimler Chrysler Ag | Manufacturing method for shaft provided with function elements uses plastic expansion of hollow shaft by internal fluidic pressure and elastic expansion of function elements fitted to shaft |
| JP4565540B2 (en) * | 2003-08-25 | 2010-10-20 | 武蔵精密工業株式会社 | Camshaft |
| GB0323232D0 (en) * | 2003-10-03 | 2003-11-05 | Rolls Royce Plc | Electrical machine |
| DE102004011815A1 (en) | 2004-03-11 | 2005-09-29 | Daimlerchrysler Ag | Camshaft and method for producing a camshaft |
| KR100799604B1 (en) * | 2006-08-24 | 2008-01-30 | 주식회사 미보 | Assembly method of cam and shaft |
| DE102007012756A1 (en) | 2007-03-16 | 2008-09-18 | Muhr Und Bender Kg | Method for producing built-up camshafts |
| DE102009057633B3 (en) * | 2009-12-09 | 2011-03-31 | Thyssenkrupp Presta Teccenter Ag | Method of making a built camshaft, camshaft body and camshaft |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1117816A (en) * | 1965-07-31 | 1968-06-26 | Gkn Screws Fasteners Ltd | Improvements relating to cam shafts |
| GB1115093A (en) * | 1965-12-30 | 1968-05-22 | G K N Screws And Fasteners Ltd | Improvements in or relating to cam shafts |
| DE2546802C3 (en) * | 1975-10-18 | 1979-08-09 | Kloeckner-Humboldt-Deutz Ag, 5000 Koeln | Cam wager for reciprocating engines |
-
1987
- 1987-07-03 CA CA000541263A patent/CA1289776C/en not_active Expired - Lifetime
- 1987-07-09 JP JP62504048A patent/JPH02501323A/en active Granted
- 1987-07-09 EP EP87904397A patent/EP0313565B1/en not_active Expired - Lifetime
- 1987-07-09 WO PCT/GB1987/000484 patent/WO1988000643A1/en active IP Right Grant
- 1987-07-09 BR BR8707744A patent/BR8707744A/en unknown
- 1987-07-10 ES ES8702045A patent/ES2007075A6/en not_active Expired
- 1987-07-11 CN CN87104854A patent/CN1009570B/en not_active Expired
-
1988
- 1988-03-11 KR KR1019880700269A patent/KR880701813A/en not_active Application Discontinuation
- 1988-07-09 GB GB8828529A patent/GB2211127B/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104918746A (en) * | 2012-08-29 | 2015-09-16 | 吉凯恩粉末冶金工程有限公司 | Method for producing a composite component, and composite component |
| CN105874227A (en) * | 2014-01-09 | 2016-08-17 | 恩普乐斯股份有限公司 | Injection molding shaft |
| CN106413980A (en) * | 2014-05-16 | 2017-02-15 | 蒂森克虏伯普利斯坦技术中心股份公司 | Method for producing a camshaft assembly |
| US10518377B2 (en) | 2014-05-16 | 2019-12-31 | Thyssenkrupp Presta Teccenter Ag | Method for producing a camshaft assembly |
| CN107530844A (en) * | 2015-04-17 | 2018-01-02 | 蒂森克虏伯普利斯坦技术中心股份公司 | Method for being positioned at cam shaft element in the shaft segment of camshaft |
| US10610986B2 (en) | 2015-04-17 | 2020-04-07 | Thyssenkrupp Presta Teccenter Ag | Method for positioning a camshaft element on a shaft segment of a camshaft |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2211127B (en) | 1990-01-31 |
| JPH0524322B2 (en) | 1993-04-07 |
| EP0313565A1 (en) | 1989-05-03 |
| EP0313565B1 (en) | 1990-09-12 |
| CN1009570B (en) | 1990-09-12 |
| CA1289776C (en) | 1991-10-01 |
| ES2007075A6 (en) | 1989-06-01 |
| GB8828529D0 (en) | 1989-02-01 |
| WO1988000643A1 (en) | 1988-01-28 |
| BR8707744A (en) | 1989-08-15 |
| JPH02501323A (en) | 1990-05-10 |
| GB2211127A (en) | 1989-06-28 |
| KR880701813A (en) | 1988-11-05 |
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