WO2007077880A1 - Method for manufacturing shaft member connected to a sintered part and internal combustion engine cam shaft - Google Patents
Method for manufacturing shaft member connected to a sintered part and internal combustion engine cam shaft Download PDFInfo
- Publication number
- WO2007077880A1 WO2007077880A1 PCT/JP2006/326084 JP2006326084W WO2007077880A1 WO 2007077880 A1 WO2007077880 A1 WO 2007077880A1 JP 2006326084 W JP2006326084 W JP 2006326084W WO 2007077880 A1 WO2007077880 A1 WO 2007077880A1
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- WO
- WIPO (PCT)
- Prior art keywords
- shaft member
- green compact
- shaft
- manufacturing
- convex portion
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/02—Camshafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
- F16H53/02—Single-track cams for single-revolution cycles; Camshafts with such cams
- F16H53/025—Single-track cams for single-revolution cycles; Camshafts with such cams characterised by their construction, e.g. assembling or manufacturing features
Definitions
- the present invention relates to a method of manufacturing a shaft member to which sintered parts are joined. Specifically, for example, the present invention relates to a manufacturing method applicable when manufacturing a so-called assembly camshaft.
- a camshaft used in an internal combustion engine such as an automobile engine is formed by compressing a metal or alloy powder into a cam lobe shape, assembling the powder into a shaft as a shaft member, and then sintering the cam lobe. And the shaft are integrated by sintered diffusion bonding.
- Patent Document 1 and Patent Document 2 a recess (groove) is formed on the outer peripheral surface of a shaft as a shaft member.
- a convex portion corresponding to the concave portion is provided on the cam lobe side.
- Patent Document 3 discloses that a concave portion is provided on both the outer peripheral surface of the shaft and the cam lobe, and both are fixed by inserting a pin into a gap formed by the two concave portions. Has been.
- Patent Document 4 discloses that a protrusion is formed by pressing a punch on the outer peripheral surface of the shaft, and the cam lobe and the shaft are temporarily fixed using the protrusion.
- Patent Document 1 Japanese Patent Laid-Open No. 54-041266
- Patent Document 2 Japanese Patent Application Laid-Open No. 60-0333302
- Patent Document 3 Japanese Patent Laid-Open No. 08-210110
- Patent Document 4 Japanese Patent Laid-Open No. 03-168305 Disclosure of the invention
- the joining method of the cam lobe and the shaft is welding joining, and there is no consideration for joining by sintered diffusion joining as in the present invention. It is an invention.
- the protrusion formed by the punch is crushed and deformed by the cam lobe when the cam lobe is inserted.
- the cam lobe is not a green compact obtained by compression molding a metal or alloy powder as in the present invention. Considering the hardness of the cam lobe and the shaft, the cam lobe is harder. It is clear.
- the present invention has been made to solve such problems, and is a method for manufacturing a shaft member joined with sintered parts, which is simple, has a good yield, and has good positional accuracy and angular accuracy. And a camshaft for an internal combustion engine manufactured by the manufacturing method.
- the present invention for solving the above problems includes a green compact forming step of forming a green compact by compression molding a metal or alloy powder, and a desired position on the outer peripheral surface of the shaft member. By pressing with a jig, the outer peripheral surface of the shaft member is deformed to form a convex portion having a height of 0.03 to 0.25 mm at the position, and formed on the outer peripheral surface of the shaft member.
- a temporary fixing process of temporarily fixing the green compact and the shaft member with an adhesive may be performed after the assembly process, before the sintering process.
- the sintered part can be a cam lobe or a cam lobe and a journal
- the shaft member can be a shaft
- the present invention for solving the above-mentioned problems is a camshaft for an internal combustion engine characterized by being formed by a method for manufacturing a shaft member.
- a green compact formed using a metal or alloy powder is placed on a shaft member, and is sintered to be integrated by sintering diffusion bonding.
- a fine convex portion is formed on the surface of the shaft member before the green compact is placed on the shaft member, and this is used to form the green compact and the compact. Since the shaft member is assembled and fixed, as in Patent Documents 1 and 2, the green compact (the force mulob in Patent Documents 1 and 2) and the shaft member (the shaft in Patent Documents 1 and 2) Since it is sufficient to process only the shaft member that does not need to be processed on both sides, the yield can be improved and the degree of freedom in design can also be improved.
- the processing for the shaft member performed in the manufacturing method of the present invention is only to form a fine convex portion by pressing a jig on the surface, and finally the convex portion is a green compact. Therefore, as in Patent Documents 1 and 2, there is no possibility that the strength is reduced by the processing.
- the shaft member and the green compact are assembled and fixed by biting the fine convex portions formed on the outer peripheral surface of the shaft member into the green compact. Therefore, as described in Patent Document 4, there is no possibility that the green compact is displaced in the axial direction or rotated in the circumferential direction after assembly, as a result, the positional accuracy, The angle accuracy can be improved.
- FIG. 1 is a flowchart showing the steps of a production method of the present invention.
- FIG. 2 is an explanatory diagram for explaining a convex portion forming step in the manufacturing method of the present invention
- (a) is a schematic cross-sectional view showing the procedure of the step
- FIG. It is an expanded sectional view of the outer peripheral surface of the formed shaft.
- FIG. 3 is an explanatory diagram for explaining an assembly process in the manufacturing method of the present invention. Explanation of symbols
- FIG. 1 is a flowchart showing the steps of the production method of the present invention.
- the present invention is not limited to the method of manufacturing the camshaft, and can be applied to the manufacture of general articles that are formed by integrating sintered parts and shaft members by sintering diffusion bonding.
- an example of manufacturing a loosely assembled camshaft in which sintered parts such as cam lobes and journals separately manufactured on the shaft are assembled.
- the sintered part is a cam lobe and the shaft member is a shaft.
- the manufacturing method of the present invention includes a green compact forming step S 1 for forming a green compact by compressing metal or alloy powder, and a desired outer peripheral surface of the shaft member.
- Attaching step S3, temporary fixing step S4 for temporarily fixing the green compact and the shaft member with an adhesive, and sintering the green compact so that the green compact and the shaft member are bonded by sintering diffusion bonding.
- the integrated sintering process S5 and force are also configured.
- the objective of the green compact forming step S1 in the production method of the present invention is to form a green compact by compressing and molding a metal or alloy powder.
- the shape of the green compact is not particularly limited, and may be appropriately designed in consideration of the shape of the final molded product. For example, when manufacturing a camshaft, the green compact is a force mlob. The shape will be exhibited.
- the metal or alloy powder used in the step S1 is not particularly limited, and any conventionally known metal or alloy powder can be used. It is preferable to use, for example, a stainless alloy powder such that the shrinkage ratio of the body ((green compact size, sintered compact size) Z green compact size X 100) is 4 to 7%.
- the green compact formed in the step S1 has a convex portion formed on a shaft member (for example, a shaft) bite in an assembly step S3 to be described later. Since a moderate load is applied, it is necessary to have a hardness that can withstand the load received in the assembly step S3. Specifically, it is preferable to set the relative density of the green compact to be 70% or more, preferably forming a green compact by applying a pressure of about 440 to 690 MPa.
- the convex forming step S2 in the manufacturing method of the present invention deforms the outer peripheral surface of the shaft member by pressing a desired position on the outer peripheral surface of the shaft member using a jig, It aims at forming a fine convex part.
- FIG. 2 is an explanatory diagram for explaining the convex portion forming step S2
- (a) is a schematic cross-sectional view showing the procedure of the step
- FIG. 2 (b) is a diagram in which the convex portion is formed.
- FIG. 3 is an enlarged sectional view of the outer peripheral surface of the shaft.
- a desired position on the outer peripheral surface of the shaft 20 as a shaft member is pressed using a jig 21.
- the outer peripheral surface of the shaft 20 is deformed, and a fine convex portion 22 is formed at the position.
- the fine protrusions 22 are used in assembling the cam lobe-shaped green compact and the shaft 20 in an assembling step S3 described later.
- the height h of the fine convex portion 22 is not limited as long as the convex portion 22 can fix the green compact by biting into the above-described green compact in the assembly step S3 described later. If the height is high enough to achieve this, it can be set appropriately. However, if the pressure is set higher than necessary, there is a risk that it may become an obstacle when assembling the green compact. At the same time, the green compact may be crushed by applying an excessive load to the green compact during assembly.
- the height of the convex portion is preferably about 0.03 to 0.25 mm. Particularly preferred is about 0.03 to 0.2 mm when forming three convex portions, and about 0.05 to 0.2 mm when forming two convex portions. When forming 5 locations, it is about 0.03 to 0.1 mm
- the concave portion 23 inevitably formed to form the fine convex portion 22 is not used in the manufacturing method of the present invention, and therefore its shape (depth and size) is There is no particular limitation.
- the concave portion 23 is preferably as small as possible, and for that purpose, it is preferable to devise the shape of the tip of the jig 21.
- the jig 21 used in the method of the present invention is not particularly limited as long as it can efficiently form the fine protrusions 22 described above, and can be appropriately selected. Is possible. Specifically, for example, it is preferable that the tip has a conical shape, and the angle is preferably about 40 to 80 °. In addition, it is preferable that R (curvature radius) of the tip of the cone is 1 mm or less, and it is particularly preferable that it is about 0.05 to 0.5 mm. If the cone angle is less than 40 °, the life of the jig 21 may be shortened. On the other hand, if the cone angle is more than 80 °, it may be difficult to obtain an appropriate convex portion 22. Further, if the R force Slmm is larger than the tip, it is difficult to form an appropriate convex portion 22, and the pressure for pressing the jig 21 increases.
- the hardness of the jig 21 is preferably equal to or higher than the hardness of the shaft as the shaft member in order to carry out the method of the present invention. If you use high speed tool steel, etc.
- the hardness of a shaft member typified by a shaft can be appropriately set according to the application of the final product manufactured by the manufacturing method of the present invention and the required performance.
- the surface hardness is preferably about HRB 75 to 105. If the surface hardness is less than HRB75, it may be difficult to form the convex portion 22 having the desired height h even if the jig 21 is pressed.
- the jig 21 This is because the lifespan of the product is reduced.
- the material having such a hardness include S45C, STKM13, and Sarako, SUJ2 material.
- the pressure when pressing the jig 21 against the surface of the shaft 20 takes into account the balance such as the hardness of the jig 21 and the hardness of the shaft 20, as described above.
- a convex portion 22 having a height h can be formed.
- it is preferably about 490-2450N. If the pressure is smaller than 490N, the height h of the convex portion may not be set to a desired value.On the other hand, if it exceeds 2450N, the depth of the unnecessary concave portion 23 becomes deeper, and the thickness of the shaft 20 depends on the thickness. This is because the entire shaft may be deformed.
- At least one convex portion 22 is provided for one green compact.
- the number to be formed is not particularly limited, and about five may be formed.
- the convex portion 22 is a nose in the cam lobe. It is preferable to provide at a position corresponding to the portion (the thickest portion) (an angle with respect to the circumferential direction of the shaft).
- the convex portion 22 has a position of 0 to + 35 ° from the position corresponding to the nose portion of the cam lobe, and 0 It is preferable to provide at a position of ⁇ 35 °, and a position of 25 ⁇ 7 °, a position of 25 ⁇ 7 ° is more preferable, and a position of 25 ⁇ 7 ° is particularly preferable.
- the position angle for forming the convex portion does not require high accuracy.
- the number and position of the projections formed on the shaft member are preferably the combination of the number and position described above.
- integrally manufacturing by sintered diffusion bonding it is not particularly limited as long as it is provided in consideration of the shape and strength of the green compact.
- the assembling step S3 in the manufacturing method of the present invention uses the convex portion formed on the outer peripheral surface of the shaft member, and the convex portion bites into the green compact while scraping a part of the green compact with the convex portion. Accordingly, an object is to assemble the green compact and the shaft member.
- FIG. 3 is an explanatory diagram for explaining the assembly step S3.
- a cam lobe-shaped pressure is applied from one end of the shaft 20 on which the fine convex portions are formed by the convex portion forming step S2.
- Assembling is carried out by inserting the powder and biting the convex portion 22 while scraping the inner surface of the shaft insertion hole formed in the green compact with the fine convex portion. At this time, since the green compact is elastically deformed, there is no deviation in the insertion direction or in the opposite direction after the green compact is inserted.
- the green compact can be obtained with higher accuracy than in the past by causing the convex portions formed on the shaft member (shaft) to bite into the green compact while scraping part of the green compact (cam lobe). Can be fixed to the shaft member.
- the convex portion 22 is bitten to about 1Z2 of the thickness W in the width direction (insertion direction) of the green compact.
- the thickness W in the width direction of the green compact exceeds 20 mm, it is preferable to set the insertion amount to about 10 mm! /.
- the height h of the convex portion 22 formed on the outer peripheral surface of the shaft member in the convex portion forming step S2 is as follows.
- FIGS. 3 (c) and 3 (d) show the procedure of the assembling step S3 when a plurality of cam lobes are fixed to the shaft, for example.
- a plurality of cam lobes are fixed, it is preferable to repeatedly perform the above-described protrusion forming step S2 and the assembling step S3.
- the convex forming step S2 is performed continuously, the cam lobe passes through the convex portion formed on the front side when inserting the cam lobe at one end of the shaft. At this time, a part of the cam lobe is scraped unnecessarily. This is because there may be a problem in strength.
- the temporary fixing S4 in the manufacturing method of the present invention is a shaft member (shaft) in the assembly step S3.
- the purpose of this is to temporarily fix the green compact (cam lobe) assembled to the base prior to the sintering process.
- the step S4 is not an essential step in the production method of the present invention, but is preferably performed to improve accuracy! /.
- the attaching step is performed while scraping a part of the green compact with the convex portion formed on the shaft member. While the displacement of the green compact in the insertion direction is unlikely to occur, fixing in the direction opposite to the green compact insertion direction (that is, the direction in which the green compact is returned) may be weaker than that in the insertion direction. Conceivable. However, this is a case where both are compared, and since the convex part bites into the green compact due to the elastic deformation of the green compact, it is fixed even in the direction opposite to the insertion direction. . In consideration of such a case, it is preferable to perform the temporary fixing step when higher accuracy is desired.
- the method of the present invention is not particularly limited. Various methods have been used in the past, such as manufacturing methods of assembly camshafts. Any means can be selected and used.
- an adhesive may be applied to the joint portion between the shaft member and the green compact. Examples of the adhesive used in this case include an alpha acrylate system.
- the sintering step S5 in the manufacturing method of the present invention is performed by sintering the green compact (cam lobe) assembled to the shaft member (shaft) and temporarily fixed as necessary.
- the object is to integrate the material with sintered diffusion bonding.
- the step S5 is the same as a conventionally known sintering step, and is not particularly limited to the production process of the present invention! /.
- sinter at 1100 to 1200 ° C, and the time varies depending on the size of the product to be manufactured and the type of metal or alloy powder used. Approximately 0.5 to 2 hours is preferred. Sintering at 1200 ° C or higher is not preferred because it may cause excessive deformation or cause fine “blowing”.
- the shrinkage rate power of the green compact in the sintering process is preferably about 7%. If the amount is less than this, diffusion bonding may be insufficient.
- the position of the cam lobe in the circumferential direction of the cam lobe after the temporary fixing process is 0 °
- the cam lobe position after the sintering process is the position of the cam lobe after the temporary fixing process ( 0 °) force
- the number of deviations was measured for each sample. Note that the clockwise direction is positive (+), and the counterclockwise direction is negative (-), considering the force in the insertion direction of the force mlob.
- camshafts Three camshafts (one cam lobe for each shaft) were manufactured by a conventionally known assembly camshaft manufacturing method. These are designated as sample Nos. 13-15.
- a conventionally known method for manufacturing an assembled camshaft is, specifically, on the outer periphery of the shaft. A groove extending in the axial direction is formed. On the other hand, a protrusion is formed on the inner peripheral surface of the cam lobe to be joined to this shaft, and the cam lobe is fitted to the shaft by matching the protrusion and the groove, and then sintered. This is a method of joining the cam lobe to the shaft (see FIGS. 1 to 3 of the aforementioned Patent Document 2).
- the method of the present invention has a very small deviation from the cam lobe position (0 °) after completion of the temporary fixing process, compared with the comparative example and the conventional example.
- the high was a part of it.
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Abstract
Provided is a simple method for manufacturing a shaft member connected to a sintered part with a high positional accuracy and angle accuracy and with a high yield. By compressing and molding a metal power or an alloy power into a pressed powder body. When assembling the pressed powder body to the shaft member, a protrusion formed on the outer circumference of the shaft member is used so that a part of the pressed powder body is shaved away by the protrusion and the protrusion comes into the pressed powder body. Thus, the pressed powder body and the shaft member are assembled and then sintering is performed.
Description
焼結部品が接合された軸部材の製造方法、および内燃機関用カムシャフ 卜 Method for manufacturing shaft member joined with sintered parts, and camshaft for internal combustion engine
技術分野 Technical field
[0001] 本発明は、焼結部品が接合された軸部材の製造方法に関する。具体的には、例え ば、いわゆる組立カムシャフトを製造する際に応用可能な製造方法に関する。 [0001] The present invention relates to a method of manufacturing a shaft member to which sintered parts are joined. Specifically, for example, the present invention relates to a manufacturing method applicable when manufacturing a so-called assembly camshaft.
背景技術 Background art
[0002] 例えば、自動車のエンジン等の内燃機関において用いられるカムシャフトは、金属 あるいは合金の粉末をカムロブ形状に圧縮成形し、これを軸部材としてのシャフトに 組み付け、その後焼結することにより、カムロブとシャフトを焼結拡散接合により一体 化することにより製造されて 、る。 [0002] For example, a camshaft used in an internal combustion engine such as an automobile engine is formed by compressing a metal or alloy powder into a cam lobe shape, assembling the powder into a shaft as a shaft member, and then sintering the cam lobe. And the shaft are integrated by sintered diffusion bonding.
[0003] このような、いわゆる組立カムシャフトを製造するにあっては、焼結部品としてのカム ロブを軸部材としてのシャフトの所定の位置に所定の角度で固定しつつ焼結を行う 必要があり、従来から、この固定方法が種々開発されている。 [0003] In manufacturing such a so-called assembled camshaft, it is necessary to perform sintering while fixing a cam lobe as a sintered part to a predetermined position of a shaft as a shaft member at a predetermined angle. In the past, various fixing methods have been developed.
[0004] 例えば、特許文献 1や特許文献 2には、軸部材としてのシャフトの外周面に凹部 (溝[0004] For example, in Patent Document 1 and Patent Document 2, a recess (groove) is formed on the outer peripheral surface of a shaft as a shaft member.
)を設け、他方、カムロブ側には、前記凹部に対応する凸部を設けることが開示され ている。 On the other hand, it is disclosed that a convex portion corresponding to the concave portion is provided on the cam lobe side.
[0005] また、特許文献 3には、シャフトの外周面、およびカムロブの双方に凹部を設け、当 該 2つ凹部により形成される空隙部にピンを挿入することにより双方を固定することが 開示されている。 [0005] Further, Patent Document 3 discloses that a concave portion is provided on both the outer peripheral surface of the shaft and the cam lobe, and both are fixed by inserting a pin into a gap formed by the two concave portions. Has been.
[0006] さらに、特許文献 4には、シャフトの外周面にポンチを押圧することにより突起部を 形成し、この突起部を利用してカムロブとシャフトとを仮固定することが開示されてい る。 [0006] Further, Patent Document 4 discloses that a protrusion is formed by pressing a punch on the outer peripheral surface of the shaft, and the cam lobe and the shaft are temporarily fixed using the protrusion.
特許文献 1:特開昭 54— 041266号公報 Patent Document 1: Japanese Patent Laid-Open No. 54-041266
特許文献 2 :特開昭 60— 033302号公報 Patent Document 2: Japanese Patent Application Laid-Open No. 60-0333302
特許文献 3:特開平 08— 210110号公報 Patent Document 3: Japanese Patent Laid-Open No. 08-210110
特許文献 4:特開平 03— 168305号公報
発明の開示 Patent Document 4: Japanese Patent Laid-Open No. 03-168305 Disclosure of the invention
発明が解決しょうとする課題 Problems to be solved by the invention
[0007] し力しながら、前記特許文献 1および特許文献 2に開示されている方法にあっては 、本来のカムシャフトの機能には不要な凹部や凸部を形成する必要があり、設計自 由度が低下することがあった。また、特にシャフトの外周面に軸方向に連続する凹部 (つまり溝)を形成すると当該凹部が形成された部分とカムロブとの間には空隙が生じ ることが多ぐ強度的に問題が生じる場合もあった。 [0007] However, in the methods disclosed in Patent Document 1 and Patent Document 2, it is necessary to form concave portions and convex portions that are not necessary for the function of the original camshaft. There was a case where the degree of freedom decreased. In particular, when a concave portion (that is, a groove) that is continuous in the axial direction is formed on the outer peripheral surface of the shaft, there is often a gap between the portion where the concave portion is formed and the cam lobe. There was also.
[0008] また、前記特許文献 3に開示されている方法にあっても、前記特許文献 1と同様、 凹部を形成する必要があるため、設計自由度が低下したり、強度が低下したりする問 題が生じ得る他、カムロブ、シャフトの他にピン部材が必要となるため、製造工程が煩 雑となり、歩留まりが低下し、生産コストが嵩むことが考えられる。 [0008] Also, even in the method disclosed in Patent Document 3, it is necessary to form a recess as in Patent Document 1, so that the degree of freedom in design decreases and the strength decreases. In addition to problems, pin members are required in addition to cam lobes and shafts, which complicates the manufacturing process, reduces yields, and increases production costs.
[0009] さらに、前記特許文献 4に開示されている方法においては、カムロブとシャフトとの 接合方法は溶接接合であり、本願発明の如く焼結拡散接合により接合することにつ いては念頭にない発明である。ここで、特許文献 4の内容を検討すると、当該文献に は、ポンチにより形成される突起部はカムロブを挿入する際に、当該カムロブによって 押し潰されて組成変形する旨が記載されている。この記載力も判断すると、カムロブ は、本発明の如く金属あるいは合金の粉末を圧縮成形した圧粉体ではないことが明 らかであり、カムロブとシャフトとの硬度を考えると、カムロブの方が硬いことが明らか である。さらにまた、特許文献 4の記載によれば、カムロブをカムシャフトに挿入した段 階では、既に突起部は押し潰されて無くなっているため、この段階においてはもはや カムロブはシャフトに固定されていない、もしくは固定されていても微弱な固定である こととなる。この状況で、本発明の如く焼結工程を行った場合、カムロブが回転してし まい、所望の角度に精度良くカムロブを固定することは不可能であると考えられる。 [0009] Furthermore, in the method disclosed in Patent Document 4, the joining method of the cam lobe and the shaft is welding joining, and there is no consideration for joining by sintered diffusion joining as in the present invention. It is an invention. Here, when the contents of Patent Document 4 are examined, it is described that the protrusion formed by the punch is crushed and deformed by the cam lobe when the cam lobe is inserted. Judging from this descriptive power, it is clear that the cam lobe is not a green compact obtained by compression molding a metal or alloy powder as in the present invention. Considering the hardness of the cam lobe and the shaft, the cam lobe is harder. It is clear. Furthermore, according to the description in Patent Document 4, since the protrusion is already crushed and lost at the stage where the cam lobe is inserted into the camshaft, the cam lobe is no longer fixed to the shaft at this stage. Or even if it is fixed, it is weak. In this situation, when the sintering process is performed as in the present invention, the cam lobe may rotate, and it is considered impossible to accurately fix the cam lobe at a desired angle.
[0010] 本発明はこの様な問題点を解決するためになされたものであり、簡便で歩留まりが よぐかつ位置精度、角度精度が良好な、焼結部品が接合された軸部材の製造方法 、および当該製造方法により製造された内燃機関用カムシャフトを提供することを主 たる課題とする。 The present invention has been made to solve such problems, and is a method for manufacturing a shaft member joined with sintered parts, which is simple, has a good yield, and has good positional accuracy and angular accuracy. And a camshaft for an internal combustion engine manufactured by the manufacturing method.
課題を解決するための手段
[0011] 上記課題を解決するための本発明は、金属あるいは合金の粉末を圧縮成形するこ とにより圧粉体を形成する圧粉体形成工程と、軸部材の外周面の所望の位置を、治 具を用いて押圧することにより当該軸部材の外周面を変形せしめ、当該位置に高さ 0 . 03-0. 25mmの凸部を形成する凸部形成工程と、軸部材の外周面に形成された 凸部を利用し、当該凸部によって圧粉体の一部を削り取りながら、当該凸部を圧粉 体に食 、込ませることにより、前記圧粉体と軸部材とを組み付ける組み付け工程と、 前記圧粉体を焼結することにより、圧粉体と軸部材とを焼結拡散接合により一体化す る焼結工程と、力もなることを特徴とする、焼結部品が接合された軸部材の製造方法 である。 Means for solving the problem [0011] The present invention for solving the above problems includes a green compact forming step of forming a green compact by compression molding a metal or alloy powder, and a desired position on the outer peripheral surface of the shaft member. By pressing with a jig, the outer peripheral surface of the shaft member is deformed to form a convex portion having a height of 0.03 to 0.25 mm at the position, and formed on the outer peripheral surface of the shaft member. An assembling step of assembling the green compact and the shaft member by using the raised convex portion and cutting the green compact with the convex portion while allowing the convex portion to bite into the green compact. A sintering process in which the green compact is sintered to integrate the green compact and the shaft member by sintering diffusion bonding, and also has a force. This is a manufacturing method.
[0012] また、前記発明にあっては、前記組み付け工程終了後、前記焼結工程を行う前に、 前記圧粉体と軸部材とを接着剤により仮止めする仮止め工程を行ってもよい。 [0012] In the invention, after the assembly process, before the sintering process, a temporary fixing process of temporarily fixing the green compact and the shaft member with an adhesive may be performed. .
[0013] さらに、前記発明にあっては、前記焼結部品をカムロブまたはカムロブとジャーナル とし、軸部材をシャフトとすることもできる。 Furthermore, in the invention, the sintered part can be a cam lobe or a cam lobe and a journal, and the shaft member can be a shaft.
[0014] さらにまた、上記課題を解決するための本発明は、軸部材の製造方法により形成さ れたことを特徴とする内燃機関用カムシャフトである。 [0014] Furthermore, the present invention for solving the above-mentioned problems is a camshaft for an internal combustion engine characterized by being formed by a method for manufacturing a shaft member.
発明の効果 The invention's effect
[0015] 本発明によれば、金属ある 、は合金の粉末を用いて形成した圧粉体を軸部材に設 置し、これを焼結することにより焼結拡散接合により一体化する、焼結部品が接合さ れた軸部材の製造方法において、軸部材に圧粉体を設置する前の段階で、当該軸 部材の表面に微細な凸部を形成し、これを利用して圧粉体と軸部材とを組み付け固 定しているので、前記特許文献 1や 2のように、圧粉体 (特許文献 1や 2においては力 ムロブ)と軸部材 (特許文献 1や 2においてはシャフト)の双方に加工を施す必要がな ぐ軸部材のみに加工を施せば足りるので、歩留まりを向上せしめることが可能となり 、また設計上の自由度も向上せしめることができる。また、本発明の製造方法におい て行う軸部材に対する加工は、その表面に治具を押圧することにより微細な凸部を形 成することのみであり、最終的には当該凸部は圧粉体との接合部分に隠れてしまうの で、前記特許文献 1や 2のように、当該加工によって強度が低下する虡もない。 [0015] According to the present invention, a green compact formed using a metal or alloy powder is placed on a shaft member, and is sintered to be integrated by sintering diffusion bonding. In the method of manufacturing a shaft member to which components are joined, a fine convex portion is formed on the surface of the shaft member before the green compact is placed on the shaft member, and this is used to form the green compact and the compact. Since the shaft member is assembled and fixed, as in Patent Documents 1 and 2, the green compact (the force mulob in Patent Documents 1 and 2) and the shaft member (the shaft in Patent Documents 1 and 2) Since it is sufficient to process only the shaft member that does not need to be processed on both sides, the yield can be improved and the degree of freedom in design can also be improved. Further, the processing for the shaft member performed in the manufacturing method of the present invention is only to form a fine convex portion by pressing a jig on the surface, and finally the convex portion is a green compact. Therefore, as in Patent Documents 1 and 2, there is no possibility that the strength is reduced by the processing.
[0016] また、このような本願発明の製造方法にあっては、特許文献 3に記載するようなピン
に代表される別部材が不要であるため、コストダウンを図ることもできる。 [0016] In such a manufacturing method of the present invention, a pin as described in Patent Document 3 is used. Since a separate member typified by is unnecessary, the cost can be reduced.
[0017] さらに、本発明の製造方法にあっては、軸部材の外周面に形成される微細な凸部 を圧粉体に食!、込ませることにより軸部材と圧粉体とを組み付け固定して 、るので、 特許文献 4に記載されて 、るように、組み付け後にお 、て圧粉体が軸方向にずれた り、周方向に回転したりする虞がなぐその結果、位置精度、角度精度を向上せしめ ることがでさる。 [0017] Further, in the manufacturing method of the present invention, the shaft member and the green compact are assembled and fixed by biting the fine convex portions formed on the outer peripheral surface of the shaft member into the green compact. Therefore, as described in Patent Document 4, there is no possibility that the green compact is displaced in the axial direction or rotated in the circumferential direction after assembly, as a result, the positional accuracy, The angle accuracy can be improved.
[0018] また、従来の方法において、シャフトに溝を形成し、カムロブに突起を形成して、嵌 合、焼結する場合は、焼結時にカムロブのみが収縮するため、クリアランスが大きくな り角度づれが大きいのに対し、本発明では、シャフト側に凸部を形成しているため、 焼結時のカムロブ (圧粉体)の収縮によりカムロブが凸部を抱き込む形となるため、角 度精度が向上する。 [0018] Also, in the conventional method, when a groove is formed on the shaft and a protrusion is formed on the cam lobe, and fitting and sintering are performed, only the cam lobe contracts during sintering, so the clearance increases and the angle increases. On the other hand, in the present invention, since the convex portion is formed on the shaft side, the cam lobe embraces the convex portion due to the shrinkage of the cam lobe (green compact) during sintering. Accuracy is improved.
図面の簡単な説明 Brief Description of Drawings
[0019] [図 1]本発明の製造方法の工程を示すフロー図である。 FIG. 1 is a flowchart showing the steps of a production method of the present invention.
[図 2]本発明の製造方法における凸部形成工程を説明するための説明図であり、 (a) は当該工程の手順を示す概略断面図であり、図 2 (b)は、凸部が形成されたシャフト の外周面の拡大断面図である。 FIG. 2 is an explanatory diagram for explaining a convex portion forming step in the manufacturing method of the present invention, (a) is a schematic cross-sectional view showing the procedure of the step, and FIG. It is an expanded sectional view of the outer peripheral surface of the formed shaft.
[図 3]本発明の製造方法における組み付け工程を説明するための説明図である。 符号の説明 FIG. 3 is an explanatory diagram for explaining an assembly process in the manufacturing method of the present invention. Explanation of symbols
[0020] 20· "シャフト [0020] 20 · "Shaft
21…治具 21 ... Jig
22…凸部 22 ... convex
発明を実施するための最良の形態 BEST MODE FOR CARRYING OUT THE INVENTION
[0021] 以下に、本発明の製造方法について、図面を用いて具体的に説明する。 Hereinafter, the production method of the present invention will be specifically described with reference to the drawings.
[0022] 図 1は、本発明の製造方法の工程を示すフロー図である。 FIG. 1 is a flowchart showing the steps of the production method of the present invention.
[0023] なお、本発明はカムシャフトの製造方法に限定されることはなぐ焼結部品と軸部材 とを焼結拡散接合により一体化して形成する物品一般を製造する際に適用可能であ る力 より具体的に説明するために、シャフトに別途製作したカムロブおよびジャーナ ル等の焼結部品を組み付けてなる、 、わゆる組立カムシャフトを製造する場合を例に
挙げ、以下では、焼結部品をカムロブとし、軸部材をシャフトとして説明する。 [0023] It should be noted that the present invention is not limited to the method of manufacturing the camshaft, and can be applied to the manufacture of general articles that are formed by integrating sintered parts and shaft members by sintering diffusion bonding. In order to explain more concretely, an example of manufacturing a loosely assembled camshaft, in which sintered parts such as cam lobes and journals separately manufactured on the shaft are assembled. In the following description, the sintered part is a cam lobe and the shaft member is a shaft.
[0024] 図 1に示すように、本発明の製造方法は、金属あるいは合金の粉末を圧縮成形す ることにより圧粉体を形成する圧粉体形成工程 S1と、軸部材の外周面の所望の位置 を、治具を用いて押圧することにより当該軸部材の外周面を変形せしめ、当該位置 に微細な凸部を形成する凸部形成工程 S2と、圧粉体と軸部材とを組み付ける組み 付け工程 S3と、前記圧粉体と軸部材とを接着剤により仮止めする仮止め工程 S4と、 前記圧粉体を焼結することにより、圧粉体と軸部材とを焼結拡散接合により一体化す る焼結工程 S5と、力も構成されている。 As shown in FIG. 1, the manufacturing method of the present invention includes a green compact forming step S 1 for forming a green compact by compressing metal or alloy powder, and a desired outer peripheral surface of the shaft member. The assembly of assembling the convex portion and the shaft member together with the convex portion forming step S2 that deforms the outer peripheral surface of the shaft member by pressing the position of the portion with a jig to form a fine convex portion at the position. Attaching step S3, temporary fixing step S4 for temporarily fixing the green compact and the shaft member with an adhesive, and sintering the green compact so that the green compact and the shaft member are bonded by sintering diffusion bonding. The integrated sintering process S5 and force are also configured.
[0025] 以下に各工程について具体的に説明する。 [0025] Each step will be specifically described below.
[0026] (1)圧粉体形成工程 [0026] (1) Green compact forming process
本発明の製造方法における圧粉体形成工程 S1は、金属あるいは合金の粉末を材 料とし、これを圧縮成形することにより圧粉体を形成することを目的としている。この圧 粉体の形状については、特に限定されることはなぐ最終成形品の形状等を考慮し て、適宜設計すればよぐ例えばカムシャフトを製造する場合には、当該圧粉体は力 ムロブの形状を呈することとなる。 The objective of the green compact forming step S1 in the production method of the present invention is to form a green compact by compressing and molding a metal or alloy powder. The shape of the green compact is not particularly limited, and may be appropriately designed in consideration of the shape of the final molded product. For example, when manufacturing a camshaft, the green compact is a force mlob. The shape will be exhibited.
[0027] 当該工程 S1において用いる金属あるいは合金の粉末については、本発明は特に 限定することはなく、従来公知の 、かなる金属あるいは合金の粉末を用いることがで きるが、焼結による圧粉体の収縮率((圧粉体寸法 焼結体寸法) Z圧粉体寸法 X 1 00)が 4〜7%となるような、例えばステンレス系合金粉末を用いることが好ましい。 [0027] The metal or alloy powder used in the step S1 is not particularly limited, and any conventionally known metal or alloy powder can be used. It is preferable to use, for example, a stainless alloy powder such that the shrinkage ratio of the body ((green compact size, sintered compact size) Z green compact size X 100) is 4 to 7%.
[0028] 当該工程 S1にお ヽて形成される圧粉体は、後で説明する組み付け工程 S3にお ヽ て、軸部材 (例えばシャフト)に形成された凸部が食い込むことになる、つまりある程 度の負荷がかけられることになるため、当該組み付け工程 S3において受ける負荷に 耐え得る程度の硬度を有している必要がある。具体的には、 440〜690MPa程度の 圧力をかけて圧粉体を形成することが好ましぐ圧粉体の相対密度は、 70%以上と することが好ましい。 [0028] The green compact formed in the step S1 has a convex portion formed on a shaft member (for example, a shaft) bite in an assembly step S3 to be described later. Since a moderate load is applied, it is necessary to have a hardness that can withstand the load received in the assembly step S3. Specifically, it is preferable to set the relative density of the green compact to be 70% or more, preferably forming a green compact by applying a pressure of about 440 to 690 MPa.
[0029] (2)凸部形成工程 [0029] (2) Convex formation process
本発明の製造方法における凸部形成工程 S2は、軸部材の外周面の所望の位置を 、治具を用いて押圧することにより当該軸部材の外周面を変形せしめ、当該位置に
微細な凸部を形成することを目的とする。 The convex forming step S2 in the manufacturing method of the present invention deforms the outer peripheral surface of the shaft member by pressing a desired position on the outer peripheral surface of the shaft member using a jig, It aims at forming a fine convex part.
[0030] 図 2は、凸部形成工程 S2を説明するための説明図であり、 (a)は当該工程の手順 を示す概略断面図であり、図 2 (b)は、凸部が形成されたシャフトの外周面の拡大断 面図である。 FIG. 2 is an explanatory diagram for explaining the convex portion forming step S2, (a) is a schematic cross-sectional view showing the procedure of the step, and FIG. 2 (b) is a diagram in which the convex portion is formed. FIG. 3 is an enlarged sectional view of the outer peripheral surface of the shaft.
[0031] 図 2 (a)に示すように、当該工程においては、軸部材としてのシャフト 20の外周面の 所望の位置を、治具 21を用いて押圧することが行われる。そして、当該工程の終了 後においては、図 2 (b)に示すように、シャフト 20の外周面は変形し、当該位置には 微細な凸部 22が形成される。 As shown in FIG. 2 (a), in this step, a desired position on the outer peripheral surface of the shaft 20 as a shaft member is pressed using a jig 21. After the end of the process, as shown in FIG. 2 (b), the outer peripheral surface of the shaft 20 is deformed, and a fine convex portion 22 is formed at the position.
[0032] 当該微細な凸部 22は、後に説明する組み付け工程 S3において、カムロブ形状の 圧粉体とシャフト 20との組み付けにおいて利用される。 [0032] The fine protrusions 22 are used in assembling the cam lobe-shaped green compact and the shaft 20 in an assembling step S3 described later.
[0033] 当該微細な凸部 22の高さ hは、凸部 22が後述する組み付け工程 S3において、前 述の圧粉体に食い込むことで圧粉体を固定できる程度であればよぐこの目的を達 成できる程度の高さであれば適宜設定することができる。し力しながら、必要以上に 高くすることは、圧粉体の組み付けの際に障害となる虞があると同時に、組み付けの 際に圧粉体に過度の負荷をかけて圧粉体を粉砕してしまう原因となる可能性がある ため好ましくない。さらに凸部を必要以上に高くすることは、高荷重となるため、治具 の寿命の低下、凸部形成荷重の増大、さらには組み付け時の圧入荷重増大による 設備荷重の増大によって生産性の悪ィ匕を招き好ましくない。当該凸部の高さは、具 体的には、 0. 03〜0. 25mm程度が好ましい。特に好ましいのは、凸部を 3箇所形 成する場合には 0. 03〜0. 2mm程度であり、凸部を 2箇所形成する場合には 0. 05 〜0. 2mm程度であり、凸部を 5箇所形成する場合には 0. 03〜0. 1mm程度である [0033] The height h of the fine convex portion 22 is not limited as long as the convex portion 22 can fix the green compact by biting into the above-described green compact in the assembly step S3 described later. If the height is high enough to achieve this, it can be set appropriately. However, if the pressure is set higher than necessary, there is a risk that it may become an obstacle when assembling the green compact. At the same time, the green compact may be crushed by applying an excessive load to the green compact during assembly. This is not preferable because it may cause Further, if the convex part is made higher than necessary, the load becomes high, so that the life of the jig is reduced, the convex part forming load is increased, and the equipment load is increased due to the increased press-fitting load during assembly. This is not preferable. Specifically, the height of the convex portion is preferably about 0.03 to 0.25 mm. Particularly preferred is about 0.03 to 0.2 mm when forming three convex portions, and about 0.05 to 0.2 mm when forming two convex portions. When forming 5 locations, it is about 0.03 to 0.1 mm
[0034] 一方で、微細な凸部 22を形成するために必然的に形成される凹部 23については 、本発明の製造方法において利用されることはなぐ従って、その形状 (深さや大きさ )は特に限定されない。し力しながら、当該凹部 23はできるだけ小さいことが好ましく 、そのために治具 21の先端形状等を工夫することが好ましい。 [0034] On the other hand, the concave portion 23 inevitably formed to form the fine convex portion 22 is not used in the manufacturing method of the present invention, and therefore its shape (depth and size) is There is no particular limitation. However, the concave portion 23 is preferably as small as possible, and for that purpose, it is preferable to devise the shape of the tip of the jig 21.
[0035] 本発明の方法において用いられる治具 21については、前述した微細な凸部 22を 効率よく形成することが可能であれば特に限定されることはなぐ適宜選択することが
可能である。具体的には、例えば、その先端が円錐状となっていることが好ましぐそ の角度は 40〜80° 程度であることが好ましい。また、その円錐先端の R (曲率半径) は lmm以下であることが好ましぐ特に好ましいのは 0. 05-0. 5mm程度である。 円錐角度が 40° 未満だと治具 21の寿命が短くなる虞があり、一方で 80° より大きい と適当な凸部 22を得ることが困難となる可能性があるからである。また、その先端の R 力 Slmmより大きいと適当な凸部 22を成形することが困難となり、また治具 21を押圧 するための圧力が大きくなつてしまうからである。 [0035] The jig 21 used in the method of the present invention is not particularly limited as long as it can efficiently form the fine protrusions 22 described above, and can be appropriately selected. Is possible. Specifically, for example, it is preferable that the tip has a conical shape, and the angle is preferably about 40 to 80 °. In addition, it is preferable that R (curvature radius) of the tip of the cone is 1 mm or less, and it is particularly preferable that it is about 0.05 to 0.5 mm. If the cone angle is less than 40 °, the life of the jig 21 may be shortened. On the other hand, if the cone angle is more than 80 °, it may be difficult to obtain an appropriate convex portion 22. Further, if the R force Slmm is larger than the tip, it is difficult to form an appropriate convex portion 22, and the pressure for pressing the jig 21 increases.
[0036] また、当該治具 21の硬度については、本発明の方法を実施するためには、軸部材 としてのシャフトの硬度と同等かそれ以上であることが好ましぐ例えば、超硬やハイ ス(高速度工具鋼)などを用いればょ 、。 [0036] Also, the hardness of the jig 21 is preferably equal to or higher than the hardness of the shaft as the shaft member in order to carry out the method of the present invention. If you use high speed tool steel, etc.
[0037] 一方で、例えばシャフトに代表される軸部材の硬度については、本発明の製造方 法により製造される最終製品の用途や要求される性能に応じて適宜設定することが 可能であるが、前述の通り、微細凸部 22を形成し、形成された凸部 22を利用して、こ れを圧粉体に食い込ませることが必要であるため、ある程度の硬度を有することが必 要である。具体的には、例えばカムシャフト用のシャフトの場合には、その表面硬度 は、 HRB75〜 105程度が好ましい。表面硬度が HRB75未満だと治具 21を押圧し ても所望の高さ hを有する凸部 22を形成することが困難となる場合があり、一方、表 面硬度が HRB105より大きいと治具 21の寿命が低下してしまうからである。このよう な硬度を有する材料としては、例えば、 S45C、 STKM13、さら〖こは、 SUJ2材料など を挙げることができる。 [0037] On the other hand, for example, the hardness of a shaft member typified by a shaft can be appropriately set according to the application of the final product manufactured by the manufacturing method of the present invention and the required performance. As described above, since it is necessary to form the fine convex portion 22 and use the formed convex portion 22 to bite into the green compact, it is necessary to have a certain degree of hardness. is there. Specifically, for example, in the case of a shaft for a camshaft, the surface hardness is preferably about HRB 75 to 105. If the surface hardness is less than HRB75, it may be difficult to form the convex portion 22 having the desired height h even if the jig 21 is pressed. On the other hand, if the surface hardness is greater than HRB105, the jig 21 This is because the lifespan of the product is reduced. Examples of the material having such a hardness include S45C, STKM13, and Sarako, SUJ2 material.
[0038] また、当該工程 S2において、治具 21をシャフト 20の表面へ押圧する際の圧力につ いては、前記治具 21の硬度やシャフト 20の硬度などのバランスを考慮し、前述した 所望の高さ hを有する凸部 22が形成できる程度に設定すればよぐ特に限定されるこ とはない。例えば、 490〜2450N程度であることが好ましい。圧力が 490Nより小さい と、凸部の高さ hを所望の値にすることができないことがあり、一方で 2450Nを超える と、不要な凹部 23の深さが深くなり、シャフト 20の肉厚如何によつては、シャフト全体 が変形する虞があるからである。 [0038] In the step S2, the pressure when pressing the jig 21 against the surface of the shaft 20 takes into account the balance such as the hardness of the jig 21 and the hardness of the shaft 20, as described above. There is no particular limitation as long as it is set to such an extent that a convex portion 22 having a height h can be formed. For example, it is preferably about 490-2450N. If the pressure is smaller than 490N, the height h of the convex portion may not be set to a desired value.On the other hand, if it exceeds 2450N, the depth of the unnecessary concave portion 23 becomes deeper, and the thickness of the shaft 20 depends on the thickness. This is because the entire shaft may be deformed.
[0039] なお、当該工程 S2においては、圧粉体 1つに対して少なくとも 1つ以上の凸部 22を
形成すればよぐ形成する数は特に限定されなぐ場合によっては 5つ程度形成して もよい。例えば、組立カムシャフトの製造に本発明の方法を適用する場合にあって、 カムロブ 1つに対し、 1つの凸部 22を形成する場合にあっては、当該凸部 22は、カム ロブにおけるノーズ部分 (最も肉厚な部分)に対応する位置 (シャフトの周方向に対す る角度)に設けることが好ましい。一方、カムロブ 1つに対し、 2つの凸部 22を形成す る場合にあっては、当該凸部 22は、カムロブにおけるノーズ部分に対応する位置か ら、 0〜+ 35° の位置と、 0〜一 35° の位置に設けることが好ましぐ 25 ± 10° 、 一 25 ± 10° の位置がさらに好ましぐ 25 ± 7° 、 25± 7° の位置が特に好ましい。 3 つの凸部を形成する場合にあっては、カムロブにおけるノーズ部分に対応する位置 から、 0〜+ 35° の位置と、 0° の位置と、 0〜一 35° の位置に設ける力 若しくは、 ノーズ部分に対応する位置から、 0〜+ 35° の位置と、 + 180° の位置と、 0〜一 35 ° の位置に設けることが好ましい。さらに、 4つの凸部を形成する場合にあっては、力 ムロブにおけるノーズ部分に対応する位置から、 0〜+ 35° の位置と、 0° の位置と 、 0〜一 35° の位置と、 + 180° の位置に設けることが好ましい。さらに、 5つの凸部 を形成する場合にあっては、カムロブにおけるノーズ部分に対応する位置から、 0〜 + 35° の位置と、 0° の位置と、 0〜一 35° の位置と、 + 150° の位置と、 150° の位置に設け力 0〜+ 35° の位置と、 180° の位置と、 0〜一 35° の位置と、 + 1 50° の位置と、— 150° の位置に設けることが好ましい。 [0039] In the step S2, at least one convex portion 22 is provided for one green compact. The number to be formed is not particularly limited, and about five may be formed. For example, when the method of the present invention is applied to the manufacture of an assembled camshaft, and when one convex portion 22 is formed for one cam lobe, the convex portion 22 is a nose in the cam lobe. It is preferable to provide at a position corresponding to the portion (the thickest portion) (an angle with respect to the circumferential direction of the shaft). On the other hand, when two convex portions 22 are formed for one cam lobe, the convex portion 22 has a position of 0 to + 35 ° from the position corresponding to the nose portion of the cam lobe, and 0 It is preferable to provide at a position of ˜35 °, and a position of 25 ± 7 °, a position of 25 ± 7 ° is more preferable, and a position of 25 ± 7 ° is particularly preferable. In the case of forming three convex portions, the force provided at the position of 0 to + 35 °, the position of 0 °, and the position of 0 to 35 ° from the position corresponding to the nose portion in the cam lobe, or From the position corresponding to the nose portion, it is preferable to provide at a position of 0 to + 35 °, a position of + 180 °, and a position of 0 to 135 °. Furthermore, in the case of forming four convex portions, from the position corresponding to the nose portion in the force mulob, the position of 0 to + 35 °, the position of 0 °, the position of 0 to 1 35 °, It is preferable to provide at a position of + 180 °. Furthermore, in the case of forming five convex portions, from the position corresponding to the nose portion in the cam lobe, a position of 0 to + 35 °, a position of 0 °, a position of 0 to 1 35 °, and + Position at 150 °, force at 150 ° position 0 to + 35 ° position, 180 ° position, 0 to 35 ° position, + 1 50 ° position, and −150 ° position It is preferable to provide in.
[0040] なお、上記の凸部を形成する位置角度については、高い精度を必要としない。軸 部材に形成する凸部の数と位置は、本発明の方法を組立カムシャフトの製造に適用 する場合は、上述したような数と位置の組み合わせが好ましいが、焼結部品と軸部材 とを焼結拡散接合により一体製造する際には、圧粉体の形状と強度を考慮して設け ればよぐ特に限定されることはない。 [0040] It should be noted that the position angle for forming the convex portion does not require high accuracy. When the method of the present invention is applied to the manufacture of the assembly camshaft, the number and position of the projections formed on the shaft member are preferably the combination of the number and position described above. When integrally manufacturing by sintered diffusion bonding, it is not particularly limited as long as it is provided in consideration of the shape and strength of the green compact.
[0041] (3)組み付け工程 [0041] (3) Assembly process
本発明の製造方法における組み付け工程 S3は、軸部材の外周面に形成された凸 部を利用し、当該凸部によって圧粉体の一部を削り取りながら、当該凸部を圧粉体に 食い込ませることにより、前記圧粉体と軸部材とを組み付けることを目的とする。 The assembling step S3 in the manufacturing method of the present invention uses the convex portion formed on the outer peripheral surface of the shaft member, and the convex portion bites into the green compact while scraping a part of the green compact with the convex portion. Accordingly, an object is to assemble the green compact and the shaft member.
[0042] 図 3は、組み付け工程 S3を説明するための説明図である。
[0043] 当該工程 S3においては、図 3 (a)および (b)に示すように、前述の凸部形成工程 S 2により微細な凸部が形成されたシャフト 20の一端から、カムロブ形状の圧粉体を挿 入し、当該微細な凸部により、圧粉体に形成されているシャフト挿入用孔の内面を削 り取りながら、当該凸部 22を食い込ませることにより組み付けを行う。この時、圧粉体 の弾性変形をともっているため圧粉体挿入後は挿入方向にも、これと逆方向にもず れることはない。 FIG. 3 is an explanatory diagram for explaining the assembly step S3. In the step S3, as shown in FIGS. 3 (a) and 3 (b), a cam lobe-shaped pressure is applied from one end of the shaft 20 on which the fine convex portions are formed by the convex portion forming step S2. Assembling is carried out by inserting the powder and biting the convex portion 22 while scraping the inner surface of the shaft insertion hole formed in the green compact with the fine convex portion. At this time, since the green compact is elastically deformed, there is no deviation in the insertion direction or in the opposite direction after the green compact is inserted.
[0044] このように、圧粉体 (カムロブ)の一部を削り取りながら軸部材 (シャフト)に形成され た凸部を圧粉体に食い込ませることにより、従来に比べて精度よく圧粉体を軸部材に 固定することができる。 [0044] In this way, the green compact can be obtained with higher accuracy than in the past by causing the convex portions formed on the shaft member (shaft) to bite into the green compact while scraping part of the green compact (cam lobe). Can be fixed to the shaft member.
[0045] この場合において、圧粉体の幅方向(挿入方向)の厚さ Wの 1Z2程度まで凸部 22 を食い込ませることが好ましい。但し、圧粉体の幅方向の厚さ Wが 20mmを超えるも のにつ 、ては、挿入量を 10mm程度とすることが好まし!/、。 [0045] In this case, it is preferable that the convex portion 22 is bitten to about 1Z2 of the thickness W in the width direction (insertion direction) of the green compact. However, if the thickness W in the width direction of the green compact exceeds 20 mm, it is preferable to set the insertion amount to about 10 mm! /.
[0046] また、圧粉体 (カムロブ)と軸部材 (シャフト)とのクリアランス(間隙)については、前 記凸部形成工程 S2において軸部材外周面に形成される凸部 22の高さ hの大きさに より適宜設定可能である力 例えば直径 0. 05-0. 2mm程度であることが好ましい 。当該クリアランスが直径 0. 05mm未満であると圧粉体の挿入自体が困難となり歩 留まりが低下する等の問題が生じる場合があり、一方、クリアランスが直径 0. 2mmよ り大きいと圧粉体に対する凸部 22の食い込みが浅くなり、その分だけ固定が困難と なる力 である。同様の観点から、圧粉体に対し軸部材の凸部 22が 0. Olmm以上 食 、込むように、クリアランスを設定することが好ま U、。 [0046] Further, regarding the clearance (gap) between the green compact (cam lobe) and the shaft member (shaft), the height h of the convex portion 22 formed on the outer peripheral surface of the shaft member in the convex portion forming step S2 is as follows. A force that can be appropriately set depending on the size, for example, a diameter of about 0.05 to 0.2 mm is preferable. If the clearance is less than 0.05 mm in diameter, it may be difficult to insert the green compact itself, resulting in a decrease in yield. On the other hand, if the clearance is larger than 0.2 mm in diameter, This is the force that makes the protrusion 22 shallow and makes it difficult to fix. From the same point of view, it is preferable to set the clearance so that the convex part 22 of the shaft member digs into the green compact by more than 0. Olmm.
[0047] 図 3 (c)および (d)は、例えば、複数のカムロブをシャフトに固定する場合の組み付 け工程 S3の手順を示している。図示するように、複数のカムロブを固定する場合には 、前述の凸部形成工程 S2と、当該組み付け工程 S3とを繰り返し行うことが好ましい。 凸部形成工程 S2を連続して行うと、シャフトの一端力 カムロブを挿入するに際し、 手前側に形成された凸部をカムロブが通過することとなり、この際にカムロブの一部を 無用に削り取ってしまうこととなり、強度的に問題が生じる場合があるからである。 [0047] FIGS. 3 (c) and 3 (d) show the procedure of the assembling step S3 when a plurality of cam lobes are fixed to the shaft, for example. As shown in the drawing, when a plurality of cam lobes are fixed, it is preferable to repeatedly perform the above-described protrusion forming step S2 and the assembling step S3. When the convex forming step S2 is performed continuously, the cam lobe passes through the convex portion formed on the front side when inserting the cam lobe at one end of the shaft. At this time, a part of the cam lobe is scraped unnecessarily. This is because there may be a problem in strength.
[0048] (4)仮止め工程 [0048] (4) Temporary fixing process
本発明の製造方法における仮止め S4は、前記組み付け工程 S3により軸部材 (シャ
フト)に組み付けられた圧粉体 (カムロブ)を焼結工程前に仮止めすることを目的とす る。 The temporary fixing S4 in the manufacturing method of the present invention is a shaft member (shaft) in the assembly step S3. The purpose of this is to temporarily fix the green compact (cam lobe) assembled to the base prior to the sintering process.
[0049] 当該工程 S4は、本発明の製造方法にあっては必須の工程ではないが、精度向上 のためには行うことが好まし!/、。 [0049] The step S4 is not an essential step in the production method of the present invention, but is preferably performed to improve accuracy! /.
[0050] 前記組み付け工程 S3についての説明からも分力るように、本発明の方法において は、圧粉体の一部を軸部材に形成された凸部により削り取りながら取り付け工程が行 われるため、圧粉体の挿入方向へのズレは生じにくい反面、圧粉体の挿入方向とは 逆の方向(つまり圧粉体を戻す方向)への固定は、前記挿入方向のそれと比べて弱 い場合が考えられる。但し、これは両者を比較した場合の話であり、圧粉体の弾性変 形にともなって凸部が圧粉体に食い込んでいるので、挿入方向と逆方向であっても 固定はされている。このような場合を考えた場合、より高い精度を望む場合には、当 該仮止め工程を行うことが好ましい。 [0050] As can be seen from the description of the assembling step S3, in the method of the present invention, the attaching step is performed while scraping a part of the green compact with the convex portion formed on the shaft member. While the displacement of the green compact in the insertion direction is unlikely to occur, fixing in the direction opposite to the green compact insertion direction (that is, the direction in which the green compact is returned) may be weaker than that in the insertion direction. Conceivable. However, this is a case where both are compared, and since the convex part bites into the green compact due to the elastic deformation of the green compact, it is fixed even in the direction opposite to the insertion direction. . In consideration of such a case, it is preferable to perform the temporary fixing step when higher accuracy is desired.
[0051] 当該工程 S4の具体的手段については、本発明の方法は特に限定することはなぐ 従来から行われて 、る組立カムシャフトの製造方法などにぉ 、て用いられて 、る種 々の手段を任意に選択して用いることが可能である。例えば、接着剤を軸部材と圧 粉体との接合部分に塗布してもよい。この場合に用いられる接着剤としては、アルフ ァシァノアクリレート系が挙げられる。 [0051] With respect to the specific means of the step S4, the method of the present invention is not particularly limited. Various methods have been used in the past, such as manufacturing methods of assembly camshafts. Any means can be selected and used. For example, an adhesive may be applied to the joint portion between the shaft member and the green compact. Examples of the adhesive used in this case include an alpha acrylate system.
(5)焼結工程 (5) Sintering process
本発明の製造方法における焼結工程 S5は、軸部材 (シャフト)に組み付けられ、必 要に応じて仮止めされた圧粉体 (カムロブ)を焼結することにより、当該圧粉体と軸部 材とを焼結拡散接合により一体化することを目的とする。 The sintering step S5 in the manufacturing method of the present invention is performed by sintering the green compact (cam lobe) assembled to the shaft member (shaft) and temporarily fixed as necessary. The object is to integrate the material with sintered diffusion bonding.
[0052] 当該工程 S5にあっては、従来公知の焼結工程と同様であり、特に本発明の製造ェ 程にぉ 、て限定されることはな!/、。 [0052] The step S5 is the same as a conventionally known sintering step, and is not particularly limited to the production process of the present invention! /.
[0053] 具体的には、例えば、 1100〜1200°Cで焼結することが好ましぐその時間は、製 造しょうとする製品の大きさや用いる金属あるいは合金の粉末の種類などにより異な る力 おおよそ 0. 5〜2時間が好ましい。 1200°C以上で焼結すると、変形が大きす ぎたり、微小な「ふくれ」が発生してしまう場合があり好ましくない。 [0053] Specifically, for example, it is preferable to sinter at 1100 to 1200 ° C, and the time varies depending on the size of the product to be manufactured and the type of metal or alloy powder used. Approximately 0.5 to 2 hours is preferred. Sintering at 1200 ° C or higher is not preferred because it may cause excessive deformation or cause fine “blowing”.
[0054] また、焼結工程における圧粉体の収縮率力 〜7%程度とすることが好ましぐ収縮
量がこれより少ない場合には拡散接合が不十分となる場合がある。 [0054] In addition, the shrinkage rate power of the green compact in the sintering process is preferably about 7%. If the amount is less than this, diffusion bonding may be insufficient.
実施例 Example
[0055] 本発明の製造方法を実施例を用いてさらに具体的に説明する。 [0055] The production method of the present invention will be described more specifically with reference to examples.
[0056] (実施例 1) [Example 1]
前記図 1に示した本発明の製造方法により 10本のカムシャフト (シャフト 1本につき カムロブ 1つ)を製造した。そのそれぞれをサンプル No. 1〜10とする。 Ten camshafts (one cam lobe per shaft) were manufactured by the manufacturing method of the present invention shown in FIG. These are designated as sample Nos. 1-10.
[0057] 各サンプルのシャフトに形成されたそれぞれの凸部の位置と高さは、以下の表 1に 示す通りである。サンプル No. 1〜4は凸部の数が 2つ、サンプル No. 5〜7は凸部 の数が 3つ、サンプル No. 8〜10は凸部の数が 5つである。 [0057] The position and height of each protrusion formed on the shaft of each sample are as shown in Table 1 below. Samples Nos. 1 to 4 have two convex parts, Samples Nos. 5 to 7 have three convex parts, and Samples Nos. 8 to 10 have five convex parts.
[0058] なお、合金の粉末としては Fe— 8Cr— 1. 9Ni— 2Mo— 2. 7Cを用い、シャフトは S[0058] Fe-8Cr- 1. 9Ni-2Mo- 2.7C was used as the alloy powder, and the shaft was S
TKM 13材の冷間弓 Iき抜きパイプを用 、た。 TKM 13 material cold bow I I used a punched pipe.
[0059] また、治具の先端部分の材質はダイヤモンドとし、その先端部分の形状は、円錐角 度 = 60° 、円錐先端の R=0. 2mmの円錐形状とした。 [0059] The material of the tip of the jig was diamond, and the shape of the tip was a conical shape with a cone angle of 60 ° and a cone tip of R = 0.2 mm.
[0060] 製造したカムシャフトにおいて、仮止め工程終了後のカムロブのシャフト周方向に おける位置を 0° とし、焼結工程終了後のカムロブの位置が、前記仮止め工程終了 後のカムロブの位置(0° )力 何度ずれているかをサンプル毎に測定した。なお、力 ムロブの挿入方向力も見て時計回りをプラス(+ )とし、反時計回りをマイナス(-)と する。 [0060] In the manufactured camshaft, the position of the cam lobe in the circumferential direction of the cam lobe after the temporary fixing process is 0 °, and the cam lobe position after the sintering process is the position of the cam lobe after the temporary fixing process ( 0 °) force The number of deviations was measured for each sample. Note that the clockwise direction is positive (+), and the counterclockwise direction is negative (-), considering the force in the insertion direction of the force mlob.
[0061] その結果を以下の表 1に示す。 [0061] The results are shown in Table 1 below.
[0062] (比較例 1) [0062] (Comparative Example 1)
凸部の大きさが本発明の製造方法の範囲外である点以外は、前記実施例と同様の 方法により 2本のカムシャフトを製造した。それぞれをサンプル No. 11〜12とする。 Two camshafts were manufactured by the same method as in the above example, except that the size of the convex portion was outside the range of the manufacturing method of the present invention. These are designated as sample Nos. 11-12.
[0063] 当該サンプルの測定結果を上記実施例と同様に以下の表 1に示す。 [0063] The measurement results of the sample are shown in Table 1 below as in the above examples.
[0064] (従来例 1) [0064] (Conventional example 1)
従来公知の組立カムシャフトの製造方法により 3本のカムシャフト(シャフト 1本につ きカムロブ 1つ)を製造した。そのそれぞれをサンプル No. 13〜15とする。 Three camshafts (one cam lobe for each shaft) were manufactured by a conventionally known assembly camshaft manufacturing method. These are designated as sample Nos. 13-15.
[0065] なお、合金の粉末、シャフト等の条件については前記実施例と同様にした。 [0065] The conditions of the alloy powder, the shaft, and the like were the same as in the previous example.
[0066] また、従来公知の組立カムシャフトの製造方法とは、具体的には、シャフトの外周に
軸方向に延びる溝を形成し、一方このシャフトに接合すべきカムロブの内周面には突 起を形成し、突起と溝とを合致させてカムロブをシャフトに嵌合した後、焼結すること によりシャフトにカムロブを接合させる方法である(前述の特許文献 2の第 1〜3図を 参照)。 [0066] Further, a conventionally known method for manufacturing an assembled camshaft is, specifically, on the outer periphery of the shaft. A groove extending in the axial direction is formed. On the other hand, a protrusion is formed on the inner peripheral surface of the cam lobe to be joined to this shaft, and the cam lobe is fitted to the shaft by matching the protrusion and the groove, and then sintered. This is a method of joining the cam lobe to the shaft (see FIGS. 1 to 3 of the aforementioned Patent Document 2).
[0067] 前記実施例 1と同様の評価を行った結果を以下の表 1に示す。 [0067] The results of the same evaluation as in Example 1 are shown in Table 1 below.
[0068] [表 1]
[0068] [Table 1]
[0069] (実施例 1、比較例 1および従来例 1の対比) [0069] (Contrast of Example 1, Comparative Example 1 and Conventional Example 1)
上記表 1からも明らかなように、本発明の方法は、比較例、および従来例と比べ、前 記仮止め工程終了後のカムロブの位置 (0° )からのずれが小さぐ非常に精度が高 いことが分力つた。 As is clear from Table 1 above, the method of the present invention has a very small deviation from the cam lobe position (0 °) after completion of the temporary fixing process, compared with the comparative example and the conventional example. The high was a part of it.
[0070] 特に、凸部の高さを 0. 03とした実施例のサンプル No. 8と、凸部の高さを 0. 02と した比較例のサンプル No. 12を対比すると、ずれ角度が大きく変化しており、本発 明の範囲に凸部の高さを決定することが有効であることが分かる。
[0070] In particular, when Sample No. 8 in the example in which the height of the convex part is 0.03 and Sample No. 12 in the comparative example in which the height of the convex part is 0.02 are compared, the deviation angle is It can be seen that it is effective to determine the height of the convex portion within the range of the present invention.
Claims
[1] 金属あるいは合金の粉末を圧縮成形することにより圧粉体を形成する圧粉体形成 工程と、 [1] a green compact forming step of forming a green compact by compressing metal or alloy powder;
軸部材の外周面の所望の位置を、治具を用いて押圧することにより当該軸部材の 外周面を変形せしめ、当該位置に高さ 0. 03-0. 25mmの凸部を形成する凸部形 成工程と、 A convex part that deforms the outer peripheral surface of the shaft member by pressing a desired position on the outer peripheral surface of the shaft member with a jig to form a convex part having a height of 0.03-0.25 mm at the position. Forming process,
軸部材の外周面に形成された凸部を利用し、当該凸部によって圧粉体の一部を削 り取りながら、当該凸部を圧粉体に食い込ませることにより、前記圧粉体と軸部材とを 組み付ける組み付け工程と、 By utilizing the convex portion formed on the outer peripheral surface of the shaft member, the convex portion and the shaft are bitten into the green compact while the convex portion is scraped off by the convex portion. An assembly process for assembling the components,
前記圧粉体を焼結することにより、圧粉体と軸部材とを焼結拡散接合により一体ィ匕 する焼結工程と、 Sintering the green compact to sinter the green compact and the shaft member together by sintering diffusion bonding;
からなることを特徴とする、焼結部品が接合された軸部材の製造方法。 The manufacturing method of the shaft member to which the sintered component was joined characterized by comprising.
[2] 前記組み付け工程終了後、前記焼結工程を行う前に、前記圧粉体と軸部材とを接 着剤により仮止めする仮止め工程を行うことを特徴とする請求項 1に記載の焼結部品 が接合された軸部材の製造方法。 [2] The temporary fixing step of temporarily fixing the green compact and the shaft member with an adhesive after the assembly step and before the sintering step is performed. A method for manufacturing a shaft member to which sintered parts are joined.
[3] 前記焼結部品がカムロブであり、軸部材がシャフトであることを特徴とする請求項 1 ないし請求項 1または 2に記載の焼結部品が接合された軸部材の製造方法。 [3] The method for manufacturing a shaft member to which the sintered component is bonded according to any one of [1] to [1] or [2], wherein the sintered component is a cam lobe and the shaft member is a shaft.
[4] 前記請求項 1〜3の何れか一の請求項に記載の軸部材の製造方法により形成され たことを特徴とする内燃機関用カムシャフト。
[4] An internal combustion engine camshaft formed by the shaft member manufacturing method according to any one of claims 1 to 3.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/159,448 US20100224146A1 (en) | 2005-12-28 | 2006-12-27 | Method for manufacturing a shaft member having a sintered part bonded thereto and a camshaft for an internal combustion engine |
JP2007552963A JPWO2007077880A1 (en) | 2005-12-28 | 2006-12-27 | Manufacturing method of shaft member to which sintered parts are joined, and camshaft for internal combustion engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2005378546 | 2005-12-28 | ||
JP2005-378546 | 2005-12-28 |
Publications (1)
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WO2007077880A1 true WO2007077880A1 (en) | 2007-07-12 |
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ID=38228235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/326084 WO2007077880A1 (en) | 2005-12-28 | 2006-12-27 | Method for manufacturing shaft member connected to a sintered part and internal combustion engine cam shaft |
Country Status (4)
Country | Link |
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US (1) | US20100224146A1 (en) |
JP (1) | JPWO2007077880A1 (en) |
KR (1) | KR20080066079A (en) |
WO (1) | WO2007077880A1 (en) |
Cited By (4)
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---|---|---|---|---|
JP2013111741A (en) * | 2011-11-24 | 2013-06-10 | Mahle Internatl Gmbh | Method of connecting structural element onto shaft |
JP2015525848A (en) * | 2012-07-18 | 2015-09-07 | マーレ インターナショナル ゲゼルシャフト ミット ベシュレンクテルハフツングMAHLE International GmbH | Camshaft |
JP2016008347A (en) * | 2014-06-26 | 2016-01-18 | 株式会社デンソー | Method and apparatus for producing sintering diffusion joining member |
CN105626176A (en) * | 2014-11-05 | 2016-06-01 | 株式会社瑞进凸轮轴 | Assembly method for assembling cam shaft |
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DE102010048225B4 (en) * | 2010-10-12 | 2021-03-18 | Neumayer Tekfor Engineering Gmbh | Production of a functional shaft |
DE102011050930A1 (en) * | 2011-06-08 | 2012-12-13 | Thyssenkrupp Presta Teccenter Ag | Camshaft and method of making the camshaft |
DE102012017040A1 (en) * | 2012-08-29 | 2014-03-27 | Gkn Sinter Metals Holding Gmbh | Method for producing a composite component and a composite component |
CN104708006A (en) * | 2013-12-11 | 2015-06-17 | 北京有色金属研究总院 | Powder metallurgy compound cam and manufacturing method thereof |
DE102014106924A1 (en) | 2014-05-16 | 2015-11-19 | Thyssenkrupp Presta Teccenter Ag | Method of making a built camshaft |
CN104668594A (en) * | 2015-01-20 | 2015-06-03 | 无锡威孚奥特凯姆精密机械有限公司 | Cam, longitudinal cutting lathe with same and chip breaking method |
KR102371064B1 (en) | 2016-12-14 | 2022-03-07 | 현대자동차주식회사 | Method for manufacturing endpiece for cam shaft and the endpiece |
DE102018121303A1 (en) * | 2018-08-31 | 2020-03-05 | Thyssenkrupp Ag | Method of manufacturing a toothed camshaft, method of manufacturing a camshaft or a shaft and using a needle device |
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- 2006-12-27 US US12/159,448 patent/US20100224146A1/en not_active Abandoned
- 2006-12-27 WO PCT/JP2006/326084 patent/WO2007077880A1/en active Application Filing
- 2006-12-27 JP JP2007552963A patent/JPWO2007077880A1/en active Pending
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JP2013111741A (en) * | 2011-11-24 | 2013-06-10 | Mahle Internatl Gmbh | Method of connecting structural element onto shaft |
JP2015525848A (en) * | 2012-07-18 | 2015-09-07 | マーレ インターナショナル ゲゼルシャフト ミット ベシュレンクテルハフツングMAHLE International GmbH | Camshaft |
JP2016008347A (en) * | 2014-06-26 | 2016-01-18 | 株式会社デンソー | Method and apparatus for producing sintering diffusion joining member |
CN105626176A (en) * | 2014-11-05 | 2016-06-01 | 株式会社瑞进凸轮轴 | Assembly method for assembling cam shaft |
Also Published As
Publication number | Publication date |
---|---|
JPWO2007077880A1 (en) | 2009-06-11 |
KR20080066079A (en) | 2008-07-15 |
US20100224146A1 (en) | 2010-09-09 |
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