WO2011089704A1 - 溶接構造および溶接方法 - Google Patents
溶接構造および溶接方法 Download PDFInfo
- Publication number
- WO2011089704A1 WO2011089704A1 PCT/JP2010/050770 JP2010050770W WO2011089704A1 WO 2011089704 A1 WO2011089704 A1 WO 2011089704A1 JP 2010050770 W JP2010050770 W JP 2010050770W WO 2011089704 A1 WO2011089704 A1 WO 2011089704A1
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- WIPO (PCT)
- Prior art keywords
- welding
- joint
- ring gear
- dimension
- welded
- Prior art date
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- 238000003466 welding Methods 0.000 title claims abstract description 184
- 238000000034 method Methods 0.000 title claims abstract description 14
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Images
Classifications
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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
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/50—Working by transmitting the laser beam through or within the workpiece
- B23K26/57—Working by transmitting the laser beam through or within the workpiece the laser beam entering a face of the workpiece from which it is transmitted through the workpiece material to work on a different workpiece face, e.g. for effecting removal, fusion splicing, modifying or reforming
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/18—Working by laser beam, e.g. welding, cutting or boring using absorbing layers on the workpiece, e.g. for marking or protecting purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/30—Seam welding of three-dimensional seams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
- B23K33/006—Filling of continuous seams for cylindrical workpieces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
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- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/06—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions for securing layers together; for attaching the product to another member, e.g. to a support, or to another product, e.g. groove/tongue, interlocking
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/02—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing by fusing glass directly to metal
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
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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
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
- F16H2048/382—Methods for manufacturing differential gearings
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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
- F16H48/00—Differential gearings
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- F16H2048/385—Constructional details of the ring or crown gear
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- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12333—Helical or with helical component
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- 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
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- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12347—Plural layers discontinuously bonded [e.g., spot-weld, mechanical fastener, etc.]
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- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12361—All metal or with adjacent metals having aperture or cut
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- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12375—All metal or with adjacent metals having member which crosses the plane of another member [e.g., T or X cross section, etc.]
Definitions
- the present invention relates to, for example, a welding structure and a welding method in which a plurality of members such as a differential case and a ring gear in an automobile differential (differential gear) are joined by welding.
- FIG. 11 shows a conventional example of a welding structure between a conventional differential case 100 and a ring gear 102.
- a hypoid gear is formed on the tooth portion 102 a of the ring gear 102.
- the groove 104 is provided on the joint surface of the differential case 100 with the ring gear 102.
- the load repeatedly acts in the directions indicated by the solid line arrow and the broken line arrow during the actual operation of the differential gear. Then, compressive stress and tensile stress are repeatedly generated at both ends in the central axis direction (vertical direction in the drawing) of the ring gear 106 on the joint surface between the differential case 108 and the ring gear 106.
- the weld bead 109 is formed only from one side of the ring gear 106 in the central axis direction on the joint surface between the differential case 108 and the ring gear 106.
- a flange member is arrange
- an object of the present invention is to provide a welding structure and a welding method capable of improving welding strength and welding quality.
- One aspect of the present invention made to solve the above problems is a welding structure in which a first member and a second member are joined by welding, wherein the first member is a second member joined to the second member.
- the second member includes a first member joint that is joined to the first member, and a direction in which the first member and the second member are arranged is a first direction, and the first member When the direction intersecting the direction is the second direction, at least both ends of the second direction in the joint surface where the first member joint portion and the second member joint portion are joined are provided,
- the first member has a third direction perpendicular to the first direction in which the second member joint and a connecting portion connected to the second member joint are arranged in order from the joint surface in the first direction.
- the dimension of the second member joint is larger than the dimension of the connecting part. That is, characterized by.
- the bonding surface includes a surface formed by connecting a plurality of surfaces facing different directions.
- an external force acts on the first member or the second member in a direction parallel to the third direction.
- the dimension of the second member joint portion is formed larger than the dimension of the connecting portion in the direction parallel to the direction in which the external force acts. . Therefore, the bending rigidity of the second member joint with respect to the bending moment is improved, so that the welding strength is reliably improved.
- the section modulus of the second member joint is increased, the welding strength can be ensured without increasing the penetration depth of the weld. Therefore, since heat input during welding can be reduced, it is possible to reduce welding distortion and welding equipment cost.
- the dimension of the second member joint in the third direction is smaller than the dimension of the first member joint.
- At least one end face of both end faces of the second member joint portion in the third direction is formed flat along the first direction.
- the first member can be positioned by applying the positioning jig to the end surface formed in a flat shape, the positioning accuracy is improved.
- a hollow portion provided between the first member joint portion and the second member joint portion is provided, and the weld portion includes both end portions of the joint surface in the second direction and the It is preferable that it is provided between the cavity portions.
- the gas that can be generated during welding can be discharged to the cavity, the occurrence of blowholes can be suppressed. Further, during cooling after welding, stress that lowers the welding strength does not easily remain at the boundary between the joint portions of the first member and the second member, so that the welding strength and the welding quality are improved.
- the first member or the second member includes a through hole penetrating between the outside and the cavity.
- the gas discharged into the cavity during welding escapes from the through hole, so that perforation of the weld is prevented. Moreover, since it can confirm that it welded so that it might penetrate to a cavity part by observing the inside of a cavity from a through hole, welding quality improves. Further, since water droplets due to condensation in the cavity that can occur during cooling after welding are removed from the through hole, corrosion of the weld can be prevented.
- the second member is a member that generates more gas than the first member during melting, and the welded portion is inclined toward the first member with respect to the joint surface. It is preferable that it is provided along the direction.
- the first member is preferably an annular member having the first direction as a radial direction and the third direction as a central axis direction.
- the welding strength and the welding quality are improved.
- the first member includes a non-joining portion connected to an outer periphery of the coupling portion in the radial direction, and the dimension of the second member joint portion is the non-joining in the central axis direction. It is preferable that it is formed smaller than the dimension of the part.
- the stirring resistance generated between the fluid existing around the first member and the first member can be reduced. Further, the weight of the first member can be reduced.
- either the inner peripheral surface of the first member or the contact surface with the inner peripheral surface of the first member joint portion of the second member on the inner peripheral surface It is preferable to have a press-fitting portion that fits with the contact surface with a press-fitting allowance.
- the second member is press-fitted into the first member or the first member is press-fitted into the second member, the positions of the first member and the second member can be maintained during welding. Therefore, welding distortion can be reduced.
- the irradiated laser light is blocked by the press-fit portion. Therefore, it is possible to prevent re-heating of the welded portion already provided by irradiating the laser beam from one side with the laser beam irradiated from the other side. Further, even when welding from the two directions is performed simultaneously, the laser beams irradiated from the two directions do not interfere with each other.
- the first member is a differential gear ring gear and the second member is a differential case which is a housing member of the differential gear.
- the stress of the welded portion can be reduced, and cracks in the vicinity of the welded portion and occurrence of blowholes in the welded portion can be suppressed.
- the weld strength and weld quality at the welded portion between the differential case and the ring gear are improved.
- One aspect of the present invention made in order to solve the above-described problem is a welding method in which a first member and a second member are joined by welding, and a second member joined to the second member included in the first member.
- the first direction is a direction in which the first member and the second member are disposed in order to join the joint portion and the first member joint portion joined to the first member of the second member, and the first direction
- the second member is arranged in order from the joint surface between the first member joint and the second member joint in the first direction.
- a joint part and a connecting part connected to the second member joint part are arranged, and the dimension of the second member joint part is larger than the dimension of the joint part in a third direction perpendicular to the first direction. And at least both in the second direction on the joint surface.
- the weld is provided in part, to perform the welding from both sides of the second direction in the bonding surface, characterized.
- the dimension of the second member joint is smaller than the dimension of the first member joint, and the first member joint and the second member joint are It is preferable to perform welding while providing a step and supplying a welding wire following the step.
- At least one of the end faces of the second member joint portion in the third direction is formed flat along the first direction, and is formed flat. It is preferable to position the first member by applying a jig to the end face.
- the welding structure and welding method according to the present invention can improve the welding strength and the welding quality.
- FIG. 2 is a cross-sectional view taken along the line AA in FIG. It is an enlarged view of the welding part of the differential case and ring gear in FIG. It is a figure which shows the mode of the protrusion part at the time of welding. It is a figure which shows a mode that a ring gear is positioned with a positioning jig. It is a figure which shows a mode that the compressive stress concentrated and generate
- FIG. 6 is a diagram showing Example 2.
- FIG. 6 is a diagram showing Example 3.
- FIG. 6 is a diagram showing Example 4.
- FIG. 10 is a diagram showing Example 5. It is a figure which shows the prior art example using the ring gear of a hypoid gear. It is a figure which shows the prior art example using the ring gear of a helical gear.
- FIG. 1 is a plan view of a welded structure between the differential case 10 and the ring gear 12, and only the vicinity of the joint portion between the differential case 10 and the ring gear 12 is illustrated.
- the differential case 10 and the ring gear 12 are joined by welding by inserting the differential case 10 into the inner peripheral side of the annular ring gear 12.
- the differential case 10 is an example of the “second member” in the claims.
- the ring gear 12 is an example of the “first member” in the claims.
- welding is performed from two directions on both sides of the ring gear 12 in the direction of the center axis S of the ring gear 12 (the direction perpendicular to the paper surface in FIG.
- a second weld bead 38 (see FIG. 3), which is a welded portion, on the surface opposite to the surface shown in FIG. It is provided in a ring shape along.
- the differential case 10 is a housing member in which a power transmission member (pinion shaft, pinion gear, side gear, etc.) to a drive shaft (not shown) is provided.
- the ring gear 12 is a gear member that meshes with a drive pinion (not shown) that transmits power from an engine (not shown).
- the material of the differential case 10 is cast iron, and the material of the ring gear 12 is steel.
- FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is an enlarged view of a joint portion between the differential case 10 and the ring gear 12 in FIG.
- the differential case 10 and the ring gear 12 are arranged in the radial direction (first direction) of the ring gear 12.
- the center axis S direction of the ring gear 12 is a direction (third direction) perpendicular to the radial direction of the ring gear 12.
- the direction (second direction) in which the first weld bead 14 and the second weld bead 38 are provided on the joint surface 25 is a direction (third direction, central axis S) perpendicular to the radial direction of the ring gear 12.
- Direction ).
- the differential case 10 is provided with a gear joint 22 to be joined to the ring gear 12.
- the gear joint portion 22 is an example of a “first member joint portion” in the claims, and is a part of the differential case 10. That is, in the claims, the “first member joint portion” is a part of the “second member”.
- the ring gear 12 is provided with a case joint 20 that is joined to the differential case 10.
- the case joint portion 20 is an example of a “second member joint portion” in the claims, and is a part of the ring gear 12.
- the “second member joint” is a part of the “first member”.
- the first weld bead 14 is provided from one end part 27a of both end parts in the central axis S direction of the ring gear 12, and the other A second weld bead 38 is provided from the end 27b.
- the ring gear 12 is formed such that the case joint portion 20, the connecting portion 18, and the tooth portion forming portion 16 are arranged in order from the joint surface 25 toward the outer periphery of the ring gear 12 in the radial direction.
- the connecting portion 18 is connected to the case joint portion 20 and the tooth portion forming portion 16, and connects the case joint portion 20 and the tooth portion forming portion 16.
- the tooth part forming part 16 is provided with a tooth part 16a on the outer periphery thereof. In this embodiment, a helical gear is formed on the tooth portion 16a.
- the gear joint portion 22 of the differential case 10 is provided with a contact surface 21 that contacts the inner peripheral surface 12a of the ring gear 12 before the differential case 10 and the ring gear 12 are welded.
- the contact surface 21 is provided with a press-fit portion 24, and a first groove 26 and a second groove 28 on both sides of the press-fit portion 24.
- the press-fit portion 24 is provided at a substantially central position in the central axis S direction of the ring gear 12 on the contact surface 21.
- the press-fit portion 24 is configured to fit the differential case 10 and the ring gear 12 with a press-fitting allowance between the inner peripheral surface 12a and the contact surface 21 when the differential case 10 is inserted into the inner peripheral surface 12a of the ring gear 12. is there.
- portions of the surface located on both sides in the central axis S direction of the ring gear 12 with the first groove 26, the press-fit portion 24, and the second groove 28 interposed therebetween may be used as the press-fit portion.
- channel 28 form the 1st cavity part 30 and the 2nd cavity part 32 between the internal peripheral surfaces 12a of the ring gear 12, respectively.
- a press-fit portion may be provided on the inner peripheral surface 12a of the ring gear 12.
- the gear joint 22 of the differential case 10 is provided with a through hole 34 that penetrates between the outside of the differential case 10 and the first cavity 30.
- a through hole penetrating between the outside of the differential case 10 and the second cavity portion 32 may be separately provided.
- a through hole may be provided in the case joint portion 20 of the ring gear 12.
- first welding bead 14 and the second welding bead 38 are provided by welding from two directions on both sides of the ring gear 12 in the central axis S direction.
- the first weld bead 14 and the second weld bead 38 are weld metal layers formed at the joint portion when the gear joint portion 22 of the differential case 10 and the case joint portion 20 of the ring gear 12 are joined by welding. .
- the first weld bead 14 is provided between the end portion 27a of the joint surface 25 in the central axis S direction and the first cavity portion 30, and the second weld bead 38 is connected to the end portion 27b of the joint surface 25 in the central axis S direction. It is provided between the second cavity 32. Further, the first weld bead 14 and the second weld bead 38 are provided along a direction inclined at an angle ⁇ with respect to the contact surface 21 in the gear joint portion 22 of the differential case 10. The above is the outline of the welding structure of the present embodiment.
- the dimension of the connecting portion 18 is ta
- the dimension between the end surface 20 a and the end surface 20 b in the case joint portion 20 is tb
- the tooth portion forming portion 16 is the dimension of.
- a thrust load external force acts in the direction indicated by the thick arrow in FIG.
- compressive stress or tensile stress acts on the first weld bead 14 and the second weld bead 38.
- ta ⁇ tb.
- the section modulus of the case joint portion 20 is expanded and the bending rigidity is improved. Therefore, even if a thrust load acts in the direction of the central axis S, compressive stress and tensile stress generated in the first weld bead 14 and the second weld bead 38 are reduced.
- ta ⁇ tb the welding strength between the differential case 10 and the ring gear 12 is improved.
- the case joint portion 20 of the ring gear 12 is provided with a protruding portion 42 protruding from the connecting portion 18 in the central axis S direction of the ring gear 12. Since the projecting portion 42 has a small size in the radial direction of the ring gear 12 and the surface opposite to the joint surface 25 in the radial direction of the ring gear 12 is released, its heat capacity is small and its rigidity is low. Therefore, when performing welding on the joint surface 25, the temperature of the projecting portion 42 increases and the Young's modulus decreases, so that it becomes easy to deform along with the expansion in the direction indicated by the broken line and the arrow in FIG.
- the protruding portion 42 is likely to be deformed due to shrinkage due to a drop in temperature during cooling after welding. Therefore, cracking of the first weld bead 14, the second weld bead 38, and their heat-affected zone can be suppressed during welding and during cooling after welding. Therefore, the welding quality is improved by setting ta ⁇ tb. Note that, by reducing the radial dimension of the ring gear 12 as much as possible in the protruding portion 42, the heat capacity can be further reduced and the rigidity can be reduced.
- the section modulus of the case joint portion 20 is expanded, the welding strength can be ensured without increasing the penetration depth of the first weld bead 14 and the second weld bead 38. Therefore, heat input during welding can be reduced. Therefore, by setting ta ⁇ tb, it is possible to reduce welding distortion and welding equipment cost.
- the ring gear 12 is reduced in weight by reducing the dimension tb of the case joint portion 20. Further, since the cross-sectional area of the case joint portion 20 is reduced, the lubricating oil (not shown) filled around the ring gear 12 when the ring gear 12 rotates around the central axis S during actual operation of the differential gear. And the stirring resistance generated between the ring gear 12 and the ring gear 12 can be reduced.
- the dimension between the end surface 22a and the end surface 22b in the gear joint portion 22 of the differential case 10 in the direction of the central axis S of the ring gear 12 is td.
- tb ⁇ td.
- a step 44 is provided between each end face 22b. Therefore, when welding is performed by bringing the inner peripheral surface 12a of the ring gear 12 and the contact surface 21 of the differential case 10 into contact with each other, the welding wire 40 is made to follow the step 44 as shown in FIG. Therefore, the position of the welding wire 40 does not further shift to the differential case 10 side. Therefore, by setting tb ⁇ td, it is possible to prevent the displacement of the welding wire 40 during welding.
- the end surface 20 a and the end surface 20 b in the central axis S direction of the case welded portion 20 of the ring gear 12 are formed flat along the radial direction of the ring gear 12. Therefore, the differential case 10 and the ring gear 12 can be positioned with high accuracy while the positioning jig 46 of the ring gear 12 is applied to either the end surface 20a or the end surface 20b, or both the end surface 20a and the end surface 20b.
- FIG. 5 shows an example in which the differential case 10 and the ring gear 12 are positioned while the positioning jig 46 is applied to the end surface 20a. Only the end surface 20a or only the end surface 20b may be formed flat along the radial direction of the ring gear 12.
- the positioning case 46 can be used to accurately position the differential case 10 and the ring gear 12. It can be carried out.
- the 1st cavity part 30 and the 2nd cavity part 32 are provided.
- the first weld bead 14 and the second weld bead 38 are respectively connected between the end portion 27a of the joint surface 25 and the first cavity portion 30, and between the end portion 27b of the joint surface 25 and the second cavity portion 32. Welding provided between them (hereinafter referred to as “penetrating welding”) is performed.
- penetrating welding the gas generated by melting the differential case 10 during welding can be discharged to the first cavity 30 and the second cavity 32. Therefore, by providing the first cavity portion 30 and the second cavity portion 32 and performing through welding, the generation of blow holes can be suppressed.
- emission amount of the gas to the 1st cavity part 30 and the 2nd cavity part 32 can be adjusted easily.
- a press-fit portion 24 is provided on the contact surface 21 of the gear joint portion 22 in the differential case 10. Then, the press-fit portion 24 is press-fitted into the inner peripheral surface 12 a of the ring gear 12, and the gear joint portion 22 is inserted on the inner peripheral side of the ring gear 12. Therefore, the positional relationship between the differential case 10 and the ring gear 12 can be maintained before and during welding. Therefore, by providing the press-fit portion 24, welding distortion can be reduced.
- the press-fitting portion 24 is provided at a position ahead of the direction in which the laser beam 23 is irradiated. Therefore, the laser beam 23 irradiated when forming the first weld bead 14 and the second weld bead 38 hits the press-fit portion 24 and is blocked. Therefore, when forming the other weld bead after forming one weld bead (for example, when forming the second weld bead 38 after forming the first weld bead 14), the other weld bead is formed. Therefore, there is no risk of reheating the one weld bead on which the laser beam has already been formed.
- the press-fit portion 24 at a position ahead of the irradiation direction of the laser beam 23, it is possible to improve the welding strength and the welding quality. Even when the laser beam 23 is simultaneously irradiated from two directions on both sides of the center axis S direction of the ring gear 12 to form the first weld bead 14 and the second weld bead 38, the laser beam 23 strikes the press-fit portion 24 and is blocked. Therefore, the laser beam 23 from two directions does not interfere. Therefore, the safety of the welding equipment can be improved by providing the press-fit portion 24 at a position ahead of the irradiation direction of the laser beam 23.
- the first weld bead 14 and the second weld bead 38 are provided by welding from two directions on both sides of the ring gear 12 in the direction of the central axis S. For this reason, the ratio of the molten component (Ni or the like) of the welding wire 40 in the first welding bead 14 and the second welding bead 38 is greater in the portion where the penetration depth is shallower than in the portion where the penetration depth is deeper. The distribution of the melting component of the welding wire 40 in the depth direction is substantially equal. Therefore, the material strength of the first weld bead 14 and the second weld bead 38 with respect to the bending stress acting during actual operation of the differential gear is uniform.
- welding strength and weld quality can be improved by performing welding from two directions on both sides of the ring gear 12 in the central axis S direction to provide the first weld bead 14 and the second weld bead 38.
- the distribution of heat input in the direction of the central axis S of the ring gear 12 can be made uniform in the portion where the first weld bead 14 and the second weld bead 38 are formed. Therefore, welding distortion can be suppressed by performing welding from two directions on both sides of the ring gear 12 in the central axis S direction.
- the first weld bead 14 and the second weld are along the direction inclined at the angle ⁇ to the ring gear 12 side with respect to the contact surface 21 of the gear joint portion 22 in the differential case 10.
- Welding for providing the bead 38 (hereinafter referred to as inclined welding) is performed. Therefore, at the time of welding, it is possible to reduce the amount of melting of the differential case 10 (material is cast iron) that generates more gas than the ring gear 12 (material is steel), so that the amount of gas generated can be reduced. Can do. Therefore, the occurrence of blow holes can be suppressed by performing inclined welding. Even if the first weld bead 14 and the second weld bead 38 are broken, the ring gear 12 is caught by the differential case 10 and cannot be removed, so that the ring gear 12 can be prevented from coming off.
- the differential case 10 is provided with a through hole 34 penetrating between the outside and the first cavity 30. Therefore, by observing the reflected light of the laser beam 23 in the first groove 26 from the through hole 34 at the time of welding, it is confirmed whether or not the through welding for forming the first weld bead 14 up to the first cavity 30 has been performed. Can be determined. Therefore, by providing the through hole 34, the welding quality can be improved reliably.
- the gas accumulated in the first cavity portion 30 escapes from the through hole 34, the gas does not easily expand in the first cavity portion 30, and the first weld bead 14 can be prevented from being perforated.
- the through holes 34 since water droplets due to condensation that can occur in the first cavity 30 during cooling after welding pass through the through holes 34, corrosion of the first weld beads 14 can be prevented. Therefore, providing the through hole 34 improves the welding quality.
- the differential case 10 is provided with a through hole penetrating between the outside and the second cavity portion 32, the same effect can be obtained with respect to the second weld bead 38.
- Example 2 as shown in FIG. 7 is also conceivable.
- the press-fit portion 24 is not provided in the differential case 10.
- a groove 51 is provided on the contact surface 21 of the differential case 10
- a cavity 52 is provided between the groove 51 and the inner peripheral surface 12 a of the ring gear 12. ing.
- the cross-sectional area of the cavity portion 52 is larger than the cross-sectional area obtained by combining the first cavity portion 30 and the second cavity portion 32 of the first embodiment. Therefore, more gas that can be generated by melting the differential case 10 during welding can be discharged to the inside of the cavity 52.
- the allowable discharge amount of the gas to the cavity 52 is increased, so that the generation of blow holes can be suppressed more reliably. Further, since the press-fitting portion 24 is not provided, the number of machining steps is reduced, and the manufacturing cost can be reduced.
- the contact surface 53 and the contact surface 55 that contact the case joint portion 20 are provided on both sides of the groove 51 in the gear joint portion 22 before welding.
- the differential case 10 is inserted into the inner periphery of the ring gear 12 before welding, the differential case 10 is attached to the inner peripheral surface 12a of the ring gear 12 on at least one of the contact surface 53 and the contact surface 55. It is desirable to press fit.
- the allowable discharge amount of the gas into the cavity 52 is increased, there is no risk of the perforation failure of the first weld bead 14 or the second weld bead 38 due to the expansion of the gas in the cavity 52.
- a modification in which the through hole 34 is not provided is also conceivable.
- Example 3 as shown in FIG. 8 is also conceivable.
- a groove 54 is provided on the inner peripheral surface 12 a of the ring gear 12.
- the cavity 56 is provided between the groove 51 and the groove 54.
- the cavity portion 56 has a larger cross-sectional area than the cavity portion 52 of the second embodiment. Therefore, more gas that can be generated when the differential case 10 melts during welding can be discharged to the cavity 56. Therefore, by providing the groove 54 in the ring gear 12, the allowable discharge amount of gas into the hollow portion 56 is increased, so that the generation of blow holes can be suppressed more reliably.
- the first welding bead 14 and the second welding bead 38 are unlikely to be perforated due to gas expansion in the cavity 56. Therefore, it is less necessary to provide a through hole that penetrates between the cavity 56 and the outside of the differential case 10.
- the differential case 10 when the differential case 10 is inserted into the inner periphery of the ring gear 12 before welding, the differential case 10 is attached to the ring gear on at least one of the contact surface 53 and the contact surface 55. It is desirable to press fit into the 12 inner peripheral surfaces 12a. Moreover, you may provide the said level
- Example 4 as shown in FIG. 9 is also conceivable.
- the inner peripheral surface 12a of the ring gear 12 is divided, and the positions of the divided inner peripheral surfaces 12a are varied in the radial direction.
- the inner peripheral surface 12a is a joint surface 25 to which the case joint portion 20 and the gear joint portion 22 are joined.
- the direction in which the first weld bead 14 and the second weld bead 38 and the second weld bead 38 are provided on the joint surface 25 intersects with the radial direction of the ring gear 12 ( In the following Examples 4 and 5, the direction in which the first weld bead 14 and the second weld bead 38 are provided on the joint surface 25 (second direction). ) Does not coincide with the direction perpendicular to the radial direction of the ring gear 12 (the third direction, the central axis S direction).
- each divided inner peripheral surface 12a is varied in the radial direction, and the positions of the contact surface 53 and the contact surface 55 of the differential case 10 are made to correspond to the position of the inner peripheral surface 12a.
- the first weld bead 14 and the second weld bead 38 are provided at different positions in the radial direction of the ring gear 12. Accordingly, even when the laser beam 23 is irradiated in the direction of the central axis S of the ring gear 12 during welding, the laser beam 23 strikes the differential case 10 or the ring gear 12 and is blocked. For this reason, the laser beam 23 irradiated to form one weld bead does not reheat by irradiating the weld bead formed on the other. Therefore, it is possible to improve the welding strength and the welding quality.
- the laser beams 23 irradiated from the two directions do not interfere with each other. Therefore, the safety of the welding equipment can be improved. Moreover, since it is not necessary to perform inclined welding, welding equipment can be simplified and manufacturing cost can be reduced. Further, even if the first weld bead 14 and the second weld bead 38 are broken, the ring gear 12 is caught by the differential case 10 and cannot be removed, so that the ring gear 12 can be prevented from coming off.
- the differential case 10 and the ring gear 12 are abutted in the direction of the central axis S of the ring gear 12. Thereby, the intensity
- the welding strength and welding quality between the differential case 10 and the ring gear 12 can be improved, and welding distortion and welding equipment costs can be reduced.
- the weight of the ring gear 12 can be reduced and the stirring resistance can be reduced as in the first to third embodiments.
- the differential case 10 when the differential case 10 is inserted into the inner periphery of the ring gear 12 before welding, at least one of the contact surface 53 and the contact surface 55 is It is desirable to press-fit the differential case 10 into the inner peripheral surface 12 a of the ring gear 12. Moreover, you may provide the through-hole which penetrates between the 1st cavity part 30 and the exterior in the differential case 10, and the through-hole which penetrates between the 2nd cavity part 32 and the exterior as needed. Moreover, you may provide the said level
- Example 5 as shown in FIG. 10 is also conceivable.
- the joint surface 25 where the case joint portion 20 and the gear joint portion 22 are joined is a surface formed by the inner peripheral surface 12a of the ring gear 12 and the end surface 20b of the case joint portion 20 (which faces different directions). A surface formed by connecting a plurality of surfaces). Then, by forming the second weld bead 38 along the end surface 20 b of the case joint portion 20, the second weld bead 38 is formed substantially in the radial direction of the ring gear 12. As a result, for example, when the differential gear is in actual operation, a thrust load is applied to the tooth portion forming portion 16 with a bias toward the upper side of the drawing as shown in FIG.
- the welding strength is improved.
- the welding strength is improved by replacing the direction of forming the first welding bead 14 and the second welding bead 38 with the example of FIG.
- the weld bead already formed on the other side is not reheated by the laser beam 23 irradiated to form one weld bead.
- the welding quality can be improved.
- the laser beams 23 irradiated from the two directions do not interfere with each other. Therefore, the safety of the welding equipment can be improved.
- the ring gear 12 when the dimension of the case joint portion 20 in the direction of the central axis S of the ring gear 12 is tb2, in this embodiment, ta ⁇ tb2.
- the welding strength and welding quality between the differential case 10 and the ring gear 12 can be improved, and welding distortion and welding equipment costs can be reduced.
- the ring gear 12 can be reduced in weight and the agitation resistance can be reduced as in the first to fourth embodiments.
- the differential case 10 When the differential case 10 is inserted into the inner periphery of the ring gear 12 before welding, it is desirable to press-fit the differential case 10 into the inner peripheral surface 12a of the ring gear 12 at the contact surface 53. Further, a cavity 60 is provided between the groove 59 provided on the contact surface 21 and the inner peripheral surface 12a. And if necessary, the differential case 10 may be provided with a through hole penetrating between the cavity 60 and the outside.
- the above-described embodiment is merely an example, and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention.
- the welded structure between the differential case and the ring gear in the differential gear is taken as an example, but the present invention is not limited to this example.
- the present invention is also applied to a welding structure of other annular members and members inserted into the inner peripheral surface of the annular member, or a welding structure of rod-shaped members or plate-shaped members.
- the case joint 20 in the direction of the central axis S of the ring gear 12 may be larger than the dimension tc of the tooth portion forming portion 16 (tb> tc).
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Abstract
Description
また、第2部材接合部における連結部から張り出した部分において、熱容量が低減し、剛性が低下するので、当該張り出した部分は温度変化に対して膨張収縮し易くなる。そのため、溶接を行う際に溶接部の割れを抑制できるので、溶接品質が向上する。
なお、接合面には、異なる方向を向く複数の面が接続されて形成された面も含まれる。
また、第2部材接合部の断面係数が拡大するので、溶接部の溶け込み深さをあまり大きくしなくても溶接強度を確保することができる。そのため、溶接時の入熱を低減することができるので、溶接歪みの低減と溶接設備コストの低減を図ることができる。
〔実施例1〕
まず、本実施例の溶接構造の概要について説明する。
図1は、デフケース10とリングギヤ12との溶接構造の平面図であり、デフケース10についてはリングギヤ12との接合部の近傍のみを図示している。
図2と図3に示すように、デフケース10とリングギヤ12とがリングギヤ12の径方向(第1方向)に配列されている。なお、リングギヤ12の中心軸S方向は、リングギヤ12の径方向と垂直に交わる方向(第3方向)である。本実施例では、接合面25における第1溶接ビード14と第2溶接ビード38とが設けられる方向(第2方向)は、リングギヤ12の径方向と垂直に交わる方向(第3方向、中心軸S方向)と一致している。
以上が、本実施例の溶接構造の概要である。
図2と図3に示すように、リングギヤ12の中心軸S方向において、連結部18の寸法をta、ケース接合部20における端面20aと端面20bとの間の寸法をtb、歯部形成部16の寸法をtcとする。
本実施例のデフケース10とリングギヤ12の溶接構造を有するデファレンシャルギヤでは、その実動時に、ドライブピニオン(不図示)からの動力伝達により、歯部形成部16に対しリングギヤ12の中心軸S方向(図2にて太い矢印で示す方向)に、スラスト荷重(外力)が作用する。そして、このようなスラスト荷重により、図2の細い矢印で示す方向に曲げモーメントが作用すると、第1溶接ビード14と第2溶接ビード38において圧縮応力または引張応力が作用する。
また、リングギヤ12の中心軸S方向の両側の2方向からレーザ光23を同時に照射して第1溶接ビード14と第2溶接ビード38とを形成する場合でも、レーザ光23は圧入部24に当たって遮られるので、2方向からのレーザ光23は干渉しない。そのため、圧入部24をレーザ光23の照射方向の先の位置に設けることにより、溶接設備の安全性を向上させることができる。
また、溶接時において、第1溶接ビード14と第2溶接ビード38を形成する部分におけるリングギヤ12の中心軸S方向の入熱の分布を均一化することができる。そのため、リングギヤ12の中心軸S方向の両側の2方向から溶接を行うことにより、溶接歪みを抑制することができる。
また、万が一、第1溶接ビード14と第2溶接ビード38が破断した場合であっても、リングギヤ12はデフケース10に引っかかって外れないので、リングギヤ12の抜けを防止できる。
図7に示すような実施例2も考えられる。
実施例2では、実施例1と異なる点として、デフケース10において圧入部24を設けていない。また、実施例1と異なる点として、デフケース10の当接面21に溝51が設けられており、この溝51とリングギヤ12の内周面12aとの間に設けられた空洞部52を有している。空洞部52の断面積は、実施例1の第1空洞部30と第2空洞部32とを組み合わせた断面積よりも大きい。そのため、溶接時にデフケース10が溶融することによって発生し得るガスを、空洞部52の内部により多く排出することができる。したがって、実施例2によれば、空洞部52へのガスの許容排出量が多くなるので、より確実にブローホールの発生を抑制することができる。また、圧入部24を設けないので、機械加工の工程が減り、製造コストを低減することができる。
また、空洞部52へのガスの許容排出量が多くなることにより、空洞部52内でのガスの膨張による第1溶接ビード14や第2溶接ビード38の穴あき不良のおそれがない場合には、貫通穴34を設けない変形例も考えられる。
図8に示すような実施例3も考えられる。
実施例3では、実施例2における溝51に加えて、リングギヤ12の内周面12aに溝54を設けている。これにより、溝51と溝54の間に設けられた空洞部56を有している。この空洞部56は、実施例2の空洞部52よりも大きな断面積となる。そのため、溶接時にデフケース10が溶融することによって発生し得るガスを、さらに多く空洞部56に排出することができる。したがって、リングギヤ12に溝54を設けることにより、空洞部56内へのガスの排出許容量は大きくなるので、さらに確実にブローホールの発生を抑制することができる。
なお、実施例2と同様に、溶接前にリングギヤ12の内周にデフケース10を挿入する際には、当接面53、当接面55うちの少なくともいずれか一方の面で、デフケース10をリングギヤ12の内周面12aに圧入させることが望ましい。
また、必要に応じて、ギヤ接合部22とケース接合部20との間に前記の段差44を設けてもよい。また、傾斜溶接を行ってもよい。
図9に示すような実施例4も考えられる。
実施例4では、リングギヤ12の内周面12aを分割して、分割した各々の内周面12aの位置を径方向に異ならせている。本実施例では内周面12aを、ケース接合部20とギヤ接合部22とが接合される接合面25としている。
なお、前記の実施例1~3においては、接合面25における第1溶接ビード14と第2溶接ビード38とが設けられる方向(第2方向)は、リングギヤ12の径方向と垂直に交わる方向(第3方向、中心軸S方向)と一致していたが、以下の実施例4,5においては、接合面25における第1溶接ビード14と第2溶接ビード38とが設けられる方向(第2方向)は、リングギヤ12の径方向と垂直に交わる方向(第3方向、中心軸S方向)とは、一致していない。
また、仮に第1溶接ビード14と第2溶接ビード38が破断した場合であっても、リングギヤ12はデフケース10に引っかかって外れないので、リングギヤ12の抜けが防止できる。
また、tb1<tcとすることにより、実施例1~3と同様に、リングギヤ12の軽量化を図ることができ、かつ、攪拌抵抗を低下させることができる。
また、必要に応じて、デフケース10に第1空洞部30と外部との間を貫通する貫通穴や、第2空洞部32と外部との間を貫通する貫通穴を設けてもよい。また、必要に応じて、ギヤ接合部22とケース接合部20との間に前記の段差44を設けてもよい。
図10に示すような実施例5も考えられる。
実施例5では、ケース接合部20とギヤ接合部22とが接合される接合面25を、リングギヤ12の内周面12aとケース接合部20の端面20bとで形成される面(異なる方向を向く複数の面が接続されて形成された面)としている。そして、第2溶接ビード38をケース接合部20の端面20bに沿わせて形成することにより、第2溶接ビード38をほぼリングギヤ12の径方向に形成している。これにより、例えば、デファレンシャルギヤの実動時におけるドライブピニオン(不図示)からの動力伝達により歯部形成部16に対し図10に示すようにスラスト荷重が図面上側に偏って作用した場合であっても、溶接強度が向上する。
なお、前記の曲げ応力が図面下側に偏って作用する場合には、第1溶接ビード14と第2溶接ビード38を形成する方向を図10の例と入れ替えることにより、溶接強度が向上する。
また、tb2<tcとすることにより、実施例1~4と同様に、リングギヤ12の軽量化を図ることができ、かつ、攪拌抵抗を低下させることができる。
また、当接面21に設けられた溝59と内周面12aとの間に空洞部60を設けている。そして、必要に応じて、この空洞部60と外部との間を貫通する貫通穴をデフケース10に設けてもよい。
上記の実施例ではデファレンシャルギヤにおけるデフケースとリングギヤとの溶接構造を例に挙げたが、本発明はこの例に限定されない。例えば、その他の環状部材と当該環状部材の内周面に挿入される部材との溶接構造や、棒状部材同士または板状部材同士の溶接構造にも適用される。
また、リングギヤ12の重量や、リングギヤ12が回転する際の潤滑油(不図示)との間で生じる攪拌抵抗が許容される範囲内であれば、リングギヤ12の中心軸S方向におけるケース接合部20の寸法tbを歯部形成部16の寸法tcよりも大きく(tb>tc)してもよい。
12 リングギヤ
12a 内周面
14 第1溶接ビード
16 歯部形成部
16a 歯部
18 連結部
20 ケース接合部
20a 端面
20b 端面
21 当接面
22 ギヤ接合部
22a 端面
22b 端面
23 レーザ光
24 圧入部
25 接合面
27a 端部
27b 端部
30 第1空洞部
32 第2空洞部
34 貫通穴
38 第2溶接ビード
40 溶接ワイヤ
42 突出部分
44 段差
46 位置決め治具
52 空洞部
53 当接面
55 当接面
56 空洞部
60 空洞部
61 第1溶接ビード境界
α 角度
S 中心軸
Claims (14)
- 第1部材と第2部材とを溶接により接合する溶接構造において、
前記第1部材は、前記第2部材と接合される第2部材接合部を備え、
前記第2部材は、前記第1部材と接合される第1部材接合部を備え、
前記第1部材と前記第2部材とが配列された方向を第1方向とし、前記第1方向に交わる方向を第2方向とするときに、
前記第1部材接合部と前記第2部材接合部とが接合される接合面における少なくとも前記第2方向の両端部に溶接部が設けられ、
前記第1部材は、前記第1方向にて前記接合面から順に、前記第2部材接合部と前記第2部材接合部に接続する連結部とが配列され、前記第1方向に垂直な第3方向にて、前記第2部材接合部の寸法が前記連結部の寸法よりも大きく形成されていること、
を特徴とする溶接構造。 - 請求項1に記載する溶接構造において、
前記第1部材または前記第2部材に対して前記第3方向に平行な方向に外力が作用すること、
を特徴とする溶接構造。 - 請求項1または2に記載する溶接構造において、
前記第3方向にて前記第2部材接合部の寸法は前記第1部材接合部の寸法よりも小さいこと、
を特徴とする溶接構造。 - 請求項1乃至3のいずれか一項に記載する溶接構造において、
前記第3方向における前記第2部材接合部の両端面の少なくともいずれか一方の端面が前記第1方向に沿って平坦状に形成されていること、
を特徴とする溶接構造。 - 請求項1乃至4のいずれか一項に記載する溶接構造において、
前記第1部材接合部と前記第2部材接合部の間に設けられた空洞部を有し、
前記溶接部は、前記接合面における前記第2方向の両端部と前記空洞部との間に設けられていること、
を特徴とする溶接構造。 - 請求項5に記載する溶接構造において、
前記第1部材または前記第2部材は、外部と前記空洞部との間を貫通する貫通穴を備えていること、
を特徴とする溶接構造。 - 請求項1乃至6のいずれか一項に記載する溶接構造において、
前記第2部材は、前記第1部材よりも溶融時に発生するガスの量が多い部材であり、
前記溶接部は、前記接合面に対して前記第1部材側に傾斜した方向に沿って設けられていること、
を特徴とする溶接構造。 - 請求項1乃至7のいずれか一項に記載する溶接構造において、
前記第1部材は、前記第1方向を径方向とし前記第3方向を中心軸方向とする環状部材であること、
を特徴とする溶接構造。 - 請求項8に記載する溶接構造において、
前記第1部材は、前記径方向にて前記連結部の外周に接続する非接合部を備え、前記中心軸方向にて前記第2部材接合部の寸法が前記非接合部の寸法よりも小さく形成されていること、
を特徴とする溶接構造。 - 請求項8または9に記載する溶接構造において、
前記第1部材の内周面または前記第2部材の前記第1部材接合部における前記内周面との当接面のいずれか一方の面に、前記内周面と前記当接面との間に圧入代をもって嵌合させる圧入部を有すること、
を特徴とする溶接構造。 - 請求項8乃至10のいずれか一項に記載する溶接構造において、
前記第1部材はデファレンシャルギヤのリングギヤであり、
前記第2部材は前記デファレンシャルギヤのハウジング部材であるデフケースであること、
を特徴とする溶接構造。 - 第1部材と第2部材とを溶接により接合する溶接方法において、
前記第1部材に備わる前記第2部材に接合される第2部材接合部と前記第2部材に備わる前記第1部材に接合される第1部材接合部とを接合するために前記第1部材と前記第2部材とを配置する方向を第1方向とし、前記第1方向に交わる方向を第2方向とするときに、
前記第1部材を、前記第1方向にて前記第1部材接合部と前記第2部材接合部との接合面から順に、前記第2部材接合部と前記第2部材接合部に接続する連結部とが配列され、前記第1方向に垂直な第3方向にて、前記第2部材接合部の寸法が前記連結部の寸法よりも大きくなるように形成しておき、
前記接合面における少なくとも前記第2方向の両端部に溶接部が設けられるように、前記接合面における前記第2方向の両端側から溶接を行うこと、
を特徴とする溶接方法。 - 請求項12に記載する溶接方法において、
前記第3方向にて前記第2部材接合部の寸法を前記第1部材接合部の寸法よりも小さくして前記第1部材接合部と前記第2部材接合部とに段差を設けておき、溶接ワイヤを前記段差に倣わせて供給しながら溶接を行うこと、
を特徴とする溶接方法。 - 請求項12または13に記載する溶接方法において、
前記第3方向における前記第2部材接合部の両端面の少なくともいずれか一方の端面を前記第1方向に沿って平坦状に形成しておき、平坦状に形成された前記端面に治具を当てて前記第1部材の位置決めを行うこと、
を特徴とする溶接方法。
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CN201080054376.0A CN102652047B (zh) | 2010-01-22 | 2010-01-22 | 焊接构造以及焊接方法 |
JP2011523115A JP5234185B2 (ja) | 2010-01-22 | 2010-01-22 | 溶接構造および溶接方法 |
US13/574,474 US9239104B2 (en) | 2010-01-22 | 2010-01-22 | Welded structure and welding method |
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EP2468447A1 (en) | 2012-06-27 |
CN102652047A (zh) | 2012-08-29 |
CN102652047B (zh) | 2014-09-03 |
US9239104B2 (en) | 2016-01-19 |
EP2468447B1 (en) | 2014-12-24 |
KR20120080254A (ko) | 2012-07-16 |
JP5234185B2 (ja) | 2013-07-10 |
US20120295125A1 (en) | 2012-11-22 |
JPWO2011089704A1 (ja) | 2013-05-20 |
KR101344562B1 (ko) | 2013-12-26 |
EP2468447A4 (en) | 2013-06-26 |
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