CN101163864A - Manufacturing a rocker lever using cold forming and welding - Google Patents

Manufacturing a rocker lever using cold forming and welding Download PDF

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Publication number
CN101163864A
CN101163864A CNA200680013665XA CN200680013665A CN101163864A CN 101163864 A CN101163864 A CN 101163864A CN A200680013665X A CNA200680013665X A CN A200680013665XA CN 200680013665 A CN200680013665 A CN 200680013665A CN 101163864 A CN101163864 A CN 101163864A
Authority
CN
China
Prior art keywords
metal blank
valve stem
assembly
arm
tubular part
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.)
Pending
Application number
CNA200680013665XA
Other languages
Chinese (zh)
Inventor
J·布龙
S·P·史密斯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GENTEK TECHNOLOGIES MARKETING
Original Assignee
GENTEK TECHNOLOGIES MARKETING
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GENTEK TECHNOLOGIES MARKETING filed Critical GENTEK TECHNOLOGIES MARKETING
Publication of CN101163864A publication Critical patent/CN101163864A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • 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
    • F01L1/08—Shape of cams
    • 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
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245—Hydraulic tappets
    • F01L1/25—Hydraulic tappets between cam and valve stem
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/146—Push-rods
    • 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
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L2001/2427—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of an hydraulic adjusting device located between cam and push rod
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • 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
    • F01L2305/00—Valve arrangements comprising rollers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49231—I.C. [internal combustion] engine making

Abstract

A method and system for forming a rocker assembly includes cold forming a metal blank to produce a portion of the rocker assembly. This portion has a tubular portion that rotatably engages a shaft and an arm that couples with a pushrod. This portion is welded to a valve lever to form the rocker assembly.

Description

Utilize the rocking bar of cold working and welding forming
Technical field
The present invention relates to be used for the rocking arm of valve type motor.More particularly, the present invention relates to the shaft portion of a kind of rocker arm assembly of cold forming.
Background technique
In automobile and other application, a plurality of rocking arms of motor general using alternately drive (or actuating) air inlet and outlet valve.When the camshaft of motor rotates, drive push rod selectively by the cam that is connected on the camshaft.Described push rod applies an active force that makes progress successively on an end of rocking arm, to impel this rocking arm around installation shaft rotation.When rocker arm pivots, its relative end produces a downward active force, with air inlet or the outlet valve of opening motor selectively.
Generally, rocking arm is integrated single component, and described single component has the cross section that is roughly U-shaped, and this rocking arm comprises a pair of relative sidewall and a pair of end wall that is arranged between the described sidewall that is separated by a diapire.Rocking arm is cast into holistic part usually.Then, this part is processed to its finished size.This process can comprise a plurality of forming step or process segment and therefore need additional expenses to produce the rocker arm assembly of a finished product.
Can make rocking arm by multiple mode, for example by metal casting, die-cut and shaping, ceramic-mould and other methods.The stamping metal blank is a kind of known manufacture method to form a rocking arm with cam-engaged.General stamping, the folding or punch steps used forms rocking arm.In the punch steps process, upper die and lower die stamp out the zone of metal blank so that this metal blank plastic deformation.When the obtained certain successfully application of the preceding method of making rocking arm, the manufacturing of rocking arm has become frequent innovation area.Particularly, reducing and to relate to the time that forms rocking arm and the method for complexity, is desirable thereby reduce the expense of being correlated with.
Summary of the invention
The present invention by prepare one basically the blank of uniform thickness overcome the defective of prior art, described blank is used to form the tubular part of rocker arm assembly.In one embodiment, provide a rocker arm assembly that is used for motor.This rocker arm assembly comprises a tubular part, and this tubular part has one first axial end, one second axial end and an integrally formed arm, and this arm is near described first axial end, and valve stem is connected near the tubular part second axial end.
In another embodiment, provide the method for a kind of manufacturing with the rocking arm of cam-engaged.This method comprises the acquisition metal blank, and described blank is convexed to form by a first surface, an opposing second surface, a peripheral surface and at least in part, and this peripheral surface and first surface and second surface intersect.This metal blank comprises the metal of prearranging quatity.This method comprises that also the flowing of a part at this place by described metal forms tubular portion by apply at least a portion that active force forms metal blank near the metal blank the first surface.
In another embodiment, a kind of method made from the rocking arm of cam-engaged comprises the metal blank that obtains annular, and this metal blank one is formed by outer cylinder surface, an inner periphery, a valve end and a cup-shaped end at least in part.This metal blank comprises the metal of prearranging quatity.This method comprises that also by apply at least a portion that active force forms metal blank near the endless metal blank the cup-shaped end, the flowing of a part at this place by described metal forms projection.
Description of drawings
Fig. 1 is the perspective view of valve train assembly, and this valve train assembly illustrates the embodiment of rocking arm of the present invention;
Fig. 2 is the perspective view of the rocking arm shown in Fig. 1;
Fig. 3 is the decomposition side view of the rocking arm shown in Fig. 1;
Fig. 4 is the perspective view of the metal blank embodiment before the shaft portion that forms the rocking arm shown in Fig. 1;
Fig. 5 is the perspective view of the intermediate embodiment during the present invention makes;
Fig. 6 is the perspective view of the tubular portion of the rocking arm shown in Fig. 3;
Fig. 7 is a ring blank embodiment's of the present invention perspective view; And
Fig. 8 is the flow chart that illustrates the embodiment of the method for making rocker arm assembly of the present invention.
Embodiment
Referring to Fig. 1, illustrate a kind of valve train assembly 20.Valve train assembly 20 comprises a plurality of valves 22, cam lobe 24, lifter or tappet 26, push rod 28, rocker arm assembly 30 and pitman arm shaft 32.As shown in the figure, when the camshaft (not shown) rotated, valve train assembly 20 was started working, and caused cam lobe 24 rotations and promoted lifter 26.Lifter 26 promotes push rod 28 and rotates rocker arm assembly 30 to impel push rod 28 around pitman arm shaft 32.
With reference to Fig. 2 and Fig. 3, illustrate rocker arm assembly 30 of the present invention in more detail.Rocker arm assembly 30 comprises tubular part 34 and valve (or valve) bar 36.Tubular part 34 comprises the tubular portion 38 and the arm 44 that is stretched out by first axial end 40 that limit first axial end 40 and second axial end 42.In one embodiment, the arm 44 and first axial end 40 form an integral body.Tubular part 34 also comprises an internal surface 46 and an outer surface 48.Arm 44 comprises the outer surface 50 of a profiling, is formed with a cup (or cup-shaped portion) 52 on this outer surface.
Valve stem 36 comprises a central body portion 60, and this central body portion has the annular inner surface 66 that formation valve contact segment 62 and thereon forms hole 68.Valve stem 36 is further formed by first side 70, second side 72 and the outer surface 74 that intersects between it.Valve contact segment 62 comprises an outside surface 80 of protruding, and is formed with a valve contact surface 82 on this protrusion surface.As shown in the figure, valve contact segment 62 has bigger than central body portion 60, is parallel to the thickness of the shaft centerline measurement in hole 68.Intersect the annular inner surface 66 and first side 70 and second side 72.
As shown in Figures 2 and 3, first side 70 of valve stem 36, second axial end 42 of tubular part 34 that reclines.The annular inner surface 66 in hole 68 and internal surface 46 alignment are so that can locate pitman arm shaft 32 (see figure 1)s by annular inner surface 66 and internal surface 46 during operation.When valve stem 36 and tubular part 34 during by coupling (or connection) state diagram, valve stem 36 tubular part 34 that reclines wherein, perhaps, valve stem 36 can be around outer surface 48 location of tubular part 34, so that annular inner surface 66 is around the part of outer surface 48.
Referring now to Fig. 4,, illustrates the metal blank 90 of the embodiment of the invention.As shown in the figure, metal blank 90 has first surface 92, second surface 94 and peripheral surface 96, and both intersect this peripheral surface and first surface 92 and second surface 94.Metal blank 90 comprises central body portion 100 and the arm portion 102 from wherein extending.
Fig. 5 illustrates the embodiment with the manufacturing intermediate of the method that rocker arm assembly 30 is formed a formed article 134.Illustrated forming product 134 comprises a tubular portion 138, and this tubular portion limits one first axial end 140, one second axial end 142 and a projection 144, and this projection stretches out from described first axial end 140.Formed article 134 also comprises an internal surface 146 and an outer surface 148.Illustrated protruding 144 comprise the outer surface 150 of a profiling.Formed article 134 is preferably cold-press moulding, and so the place is discussed.
Fig. 6 illustrates the tubular part 34 of rocker arm assembly 30 in more detail.Fig. 7 illustrates the embodiment of tubular blank 170 of the present invention.Tubular blank 170 comprises one first end 172, one second end 174, an internal surface 176 and an outer surface 178.First end 172 is formed by the annular surface 180 that stretches, and this annular surface and internal surface 176 and outer surface 178 intersect.
Fig. 8 illustrates a kind of method of making rocker arm assembly 30.The method comprising the steps of 300, and wherein the blank material that is obtained is used to make tubular part 34.In step 310, blank material is formed the blank of a desired shape.In an embodiment of step 310, as shown in Figure 4, desired shape is a metal blank 90.In the alternative of step 310, as shown in Figure 7, desired shape is a tubular blank 170.In step 320, blank is formed formed article.In an embodiment of step 320, as shown in Figure 5, the goods of formed thereby are formed article 134.Preferably, step 320 comprises the cold working blank, although can use other suitable processing method, for example hot extrusions.In step 330, form a cup 52.In an embodiment of step 330, as shown in Figure 6, formed article is a tubular part 34. Step 320 and 330 can be implemented with suitable forming process.
In step 340, the blank that is obtained is used to form a valve stem.In step 350, blank is formed a valve stem.Step 350 can comprise a plurality of operating procedures, wherein, forms one first reservation shape, for example realizes by punched metal sheet, processes this reservation shape then and further to form valve contact segment 62.In step 370, valve stem is located in abutting connection with tubular part by desired radially aligned mode.This desired radially aligned mode is determined by predetermined radial deflection amount or the relative angle between cup 52 and the valve contact surface 82.As will be appreciated, can make different rocker arm assembly 30 by changing predetermined radial deflection amount.In step 380, valve stem is fixedly secured on the tubular part to make a rocker arm assembly.In one embodiment, valve stem is soldered on the tubular part.Qualified welding method comprises laser bonding, pulsed-plasma arc welding and electron beam welding.
The shaping that discuss in this place (or formation) process can comprise; but be not limited to cold working; for example form a tubular portion by using drawing die or drawing (mandrel); or a part of coming shaped blanks by punching press or compacting, the part of blank is shaped as a cavity in mould (not shown) inside.In such forming process, blank is located in abutting connection with a mould (or punch die), and when blank material during by plastic deformation, at least a portion blank is formed desired or predetermined shape.
In addition, if desired, the axial length of tubular part 34 or cup 52 can be changed along the position of the axial length of tubular part 34, to change the crow flight distance between cup 52 and the valve stem 36.As a result, rocker arm assembly 30 goes for various valve configuration and desired relative angle.In addition, tubular part 34 and valve stem 36 can be used in suction valve and two kinds of application of outlet valve, thereby reduce the total quantity of using the parts in a cylinder valve assembly.The number of components that is reduced has further reduced a kind of like this cost of assembly.
When illustrating when of the present invention at the instantiation of implementing optimal way of the present invention, the many kinds that those skilled in the art will appreciate that said system and method change and displacement, and described variation and displacement all drop in the spirit and scope of the present invention of setting forth as claim.

Claims (19)

1. rocker arm assembly that is used for motor, it comprises:
Tubular part, it has first axial end, second axial end and integrally formed arm, and described arm is near described first axial end; With
Valve stem, it is connected on the described tubular part near described second axial end and at the opposite position of described arm.
2. assembly as claimed in claim 1 is characterized in that it also comprises:
Be formed on the cup in the described arm, described cup is suitable for being connected on the push rod selectively.
3. assembly as claimed in claim 1 is characterized in that it also comprises:
Be formed on the valve contact surface on the described valve stem.
4. assembly as claimed in claim 1 is characterized in that, the axial end of the described tubular part of contacts side surfaces of described valve stem.
5. assembly as claimed in claim 1 is characterized in that described valve stem is connected by welding on the described tubular part.
6. assembly as claimed in claim 1 is characterized in that described valve stem is connected on the described tubular part by laser bonding.
7. assembly as claimed in claim 1 is characterized in that described valve stem is connected on the described tubular part by electron beam welding.
8. assembly as claimed in claim 1 is characterized in that described valve stem is connected on the described tubular part by pulsed-plasma arc welding.
9. method of making the rocking arm of cam-engaged, it comprises:
Obtain metal blank, form described metal blank by first surface, opposing second surface, peripheral surface and convex portion at least in part, described peripheral surface and described first surface and described second surface intersect, and wherein, described metal blank comprises the metal of prearranging quatity; With
By apply be shaped at least a portion of described metal blank of active force near the described metal blank the described first surface, wherein, tubular portion is by the mobile formation of the part of described metal.
10. method as claimed in claim 9 is characterized in that, forms the middle body that described metal blank comprises the described metal blank of cold working.
11. method as claimed in claim 9 is characterized in that, it also is included in the described projection and forms cup.
12. method as claimed in claim 9 is characterized in that, it also comprises makes valve stem radially aim at described tubular portion.
13. method as claimed in claim 9 is characterized in that, it also comprises valve stem is welded on the described tubular portion.
14. method as claimed in claim 13 is characterized in that, described welding comprises laser bonding.
15. the method for the rocking arm of manufacturing and cam-engaged, it comprises:
Obtain the endless metal blank, described endless metal blank is formed by outer cylinder surface, inner periphery, valve end and cup end at least in part, and wherein said endless metal blank comprises the metal of prearranging quatity; With
By apply near at least a portion of the described endless metal blank the described cup end active force on described endless metal blank, form the projection, wherein, projection is that described projection is extended from tubular portion by the mobile formation of the part of described metal.
16. method as claimed in claim 15 is characterized in that, it also comprises:
Contiguous mould is located described endless metal blank, and wherein, described mould comprises cavity, wherein, forms described endless metal blank and is included in the predetermined direction in described endless metal blank upper edge and applies active force, thereby impel metal to flow in the described cavity.
17. method as claimed in claim 15 is characterized in that, it also is included in the described projection and forms cup.
18. method as claimed in claim 15 is characterized in that, it also comprises valve lever is welded on the described tubular portion.
19. method as claimed in claim 18 is characterized in that, described welding comprises laser bonding.
CNA200680013665XA 2005-02-23 2006-01-25 Manufacturing a rocker lever using cold forming and welding Pending CN101163864A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/063,915 US20060185636A1 (en) 2005-02-23 2005-02-23 Manufacturing a rocker lever using cold forming and welding
US11/063,915 2005-02-23

Publications (1)

Publication Number Publication Date
CN101163864A true CN101163864A (en) 2008-04-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNA200680013665XA Pending CN101163864A (en) 2005-02-23 2006-01-25 Manufacturing a rocker lever using cold forming and welding

Country Status (5)

Country Link
US (2) US20060185636A1 (en)
EP (1) EP1861591A4 (en)
KR (1) KR20070110108A (en)
CN (1) CN101163864A (en)
WO (1) WO2006091317A2 (en)

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Also Published As

Publication number Publication date
US20070039174A1 (en) 2007-02-22
WO2006091317A2 (en) 2006-08-31
US20060185636A1 (en) 2006-08-24
WO2006091317A3 (en) 2006-12-21
KR20070110108A (en) 2007-11-15
EP1861591A2 (en) 2007-12-05
EP1861591A4 (en) 2008-10-22

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Open date: 20080416