WO2016129337A1 - 溶接物品の製造方法及び溶接物品 - Google Patents
溶接物品の製造方法及び溶接物品 Download PDFInfo
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- WO2016129337A1 WO2016129337A1 PCT/JP2016/051478 JP2016051478W WO2016129337A1 WO 2016129337 A1 WO2016129337 A1 WO 2016129337A1 JP 2016051478 W JP2016051478 W JP 2016051478W WO 2016129337 A1 WO2016129337 A1 WO 2016129337A1
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- welded
- welding
- projection
- subdivided
- portions
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 158
- 239000002184 metal Substances 0.000 claims description 29
- 230000002500 effect on skin Effects 0.000 abstract description 23
- 230000007246 mechanism Effects 0.000 description 16
- 239000003990 capacitor Substances 0.000 description 7
- 238000005304 joining Methods 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Classifications
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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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/14—Projection welding
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
- B23K11/25—Monitoring devices
- B23K11/252—Monitoring devices using digital means
- B23K11/257—Monitoring devices using digital means the measured parameter being an electrical current
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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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/08—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of welds or the like
Definitions
- the present invention relates to a manufacturing method for manufacturing a welded article by resistance-welding one welded member having a projection formed on a welded portion having a short side and a long side longer than this to the other welded member, and It relates to a welded article.
- the carrier cover leg and the disk-like member in the gear part are mechanically coupled by electrical press-fitting called arc welding or ring mash welding.
- arc welding the leg portion of the carrier cover is fitted into a welding hole provided in the disk-like member, and the entire circumference or a part of the fitted portion is welded by arc welding.
- the time for injecting thermal energy into the welded part compared to the capacitor storage type welding method in which energy is stored in the capacitor and the energy is discharged in a short time to perform welding.
- the legs divided into some of the carrier covers are aligned with the bonding holes provided in the disk-shaped member, and the bonding current is applied with the applied pressure applied. Therefore, an electric press-fitting method is proposed in which the tip portion of the leg portion of the carrier cover is plastically flowed and pressed into the bonding hole to perform solid-phase bonding (see, for example, Patent Document 1).
- the joining hole is provided in the center of the disk-shaped member, and the divided leg portions of the carrier cover are press-fitted into the welding hole at a plurality of locations.
- the present invention improves how the weld strength of a welded part obtained by resistance welding one welded member having a projection formed on a welded part having a short side and a longer side longer than this and the other welded member. That is the issue.
- a welded article is manufactured by resistance welding a first welded member and a second welded member each having a long projection portion on a welded portion having a short side and a long side longer than the short side.
- a subdivided groove is provided in the projection side of the first member to be welded in the direction of the short side to subdivide the projection unit, thereby flowing through the subdivided projection unit. The equalization of the current value in the long side direction of the welding current is improved.
- a first member to be welded having an elongated projection portion provided with a subdivided groove is provided (step S1).
- the 2nd member to be welded joined with the 1st member to be welded is provided (Step S2).
- the projection part of the first member to be welded is brought into contact with the second member to be welded (step 3).
- a welding current is applied, and both the welded members are resistance-welded (step 4).
- a stopper portion is provided in the subdivided groove or at both ends of the first welded member, and the stopper portion is attached to the second welded member at the end of welding. The welding may be stopped to stop the progress of welding, and a part of the welding current may be laterally flowed. A welded article having uniform weld strength can be obtained.
- the subdivided grooves divided into a plurality of divisions may be provided by changing the inclination of the subdivided grooves.
- the depth, groove width and number of grooves can be easily adjusted.
- the first welded member is a carrier cover including a plurality of leg portions in the gear portion
- the second welded member is a base plate in the gear portion
- the plurality of legs are provided with the projections subdivided by the subdividing grooves on the front end surfaces thereof, and the subdivided projections of the plurality of legs are resistance welded to the welded parts of the base plate.
- the first member to be welded is a metal plate having a flat surface or a curved surface, the thickness of the metal plate is the short side, and the flat surface of the metal plate or A length of the curved surface is the long side, and a plurality of the projection portions subdivided by the subdividing grooves are provided on the surface of the thickness to be a welded portion of the metal plate, and the metal plate is subdivided.
- the projection part may be manufactured by a manufacturing method in which resistance welding is performed on the welded part of the second welded member. In such a method for manufacturing a welded article, good stud resistance welding is possible even with a relatively thin metal plate.
- One aspect of the welded article according to the present invention is a welded article formed by resistance welding a carrier cover including a plurality of legs in a gear part and a base plate, and each leg of the carrier cover includes:
- a welded article is manufactured which includes a plurality of subdivided projection portions in a welded portion welded to the base plate, and makes the plurality of projection portions contact the welded portion of the base plate to perform resistance welding.
- Resistance welding can be performed at a desired welding strength on the welded portion of the plate.
- the first welded member provided with the projection portion on the welded portion having the short side and the long side longer than the short side and the welded portion of the second welded member are welded to each other. Resistance welding with strength is possible.
- FIG. 1 (A) shows the 1st, 2nd to-be-welded member
- FIG.1 (B) The 2nd member to be welded is shown.
- the figure for demonstrating the welding article which concerns on Embodiment 1 of this invention is shown.
- achieves the manufacturing method which concerns on Embodiment 1 of this invention is shown.
- the figure for demonstrating the welding article which concerns on Embodiment 2 of this invention is shown.
- the figure for demonstrating the welding article which concerns on Embodiment 3 of this invention is shown. It is a flowchart explaining the manufacturing method of the welding article which concerns on embodiment of this invention.
- the figure for demonstrating the conventional welding article is shown.
- the first welded member and the second welded member provided with projections in the welded portion having a short side and a long side longer than the short side in the prior art. And how the resistance welding is difficult will be described, and the background to the present invention will be described.
- the thickness of a metal plate which is one welded member is short, and a welded portion having the short side and a long side forming a long welded surface is stud resistance welded to the plane of the other welded member.
- a projection is formed on the elongated welded portion of one of the welded members. This projection naturally has an elongated shape, and in particular, the tip of the projection has an elongated surface with a small width.
- one welded member A having a general projection portion P is attached to a welded portion having a long welded surface having a short side W equal to the thickness and a long side L of the main surface.
- a welding current When stud resistance welding is performed by pressing against the plane of the welding member B and flowing a welding current, the vicinity of both end portions of the projection portion P of one of the welded members A is melted, but the central portion is difficult to melt, and the projection portion P is It turned out that the tendency becomes strong, so that it becomes long and thin.
- the projection part P becomes longer. It was found that the vicinity of both end portions of the projection portion P of one welded member A is more easily melted, but the center portion is more likely to be more difficult to melt, and satisfactory stud resistance welding cannot be performed. . *
- the welded portion corresponding to the central portion of the projection portion P of one of the welded members A has insufficient heat generation and is insufficiently melted and acts as a stopper, so that the welding strength is insufficient. Further, when a large welding current is applied so that the welded portion corresponding to the central portion of the projection portion P of one welded member A is satisfactorily welded, the vicinity of both ends of the projection portion P of one welded member A The portion to be welded corresponding to may melt and scatter excessively, resulting in poor welding. *
- the value of the welding current flowing through the center of one welded member A is the smallest, and welding proceeds toward both ends. It was found that the current value increased. That is, by utilizing the elongated projection portion P formed on the welded portion which is the thickness of one welded member A such as a metal plate, one of the welded members A is stud resistance welded to the other welded member B. In this case, due to the skin effect, the current value of the welding current flowing through the center of one welded member becomes the smallest as shown by the thickness of the arrow i in FIG. It was confirmed that the current value increased.
- a subdivided groove is provided at least in the short side direction of the elongated projection portion to subdivide it into a plurality of projection portions, and the length of each projection portion is shortened.
- the projection part of one member to be welded means that one of the objects to be welded consists of a portion that contributes to welding by forming a nugget between the projection and the other member to be welded. It refers to the tip of the welding member.
- subdivision of the projection part means that only the projection part is divided into short projection parts by a subdivision groove formed in the short width direction of the projection part, or a part that does not contribute to welding together with the projection part. This means that the subdivided grooves are deeply formed.
- the first member 1 to be welded is a carrier cover in the above-described automobile gear portion, and is divided into four main portions 10 and four legs 11, 12 bent substantially perpendicularly from the main body 10. 13 and 14 are metal members. These four legs 11 to 14 are provided at almost equal intervals, and the size and shape are substantially the same. In FIG. 1A, the leg portion 13 is behind the leg portion 11 and cannot be seen.
- the second welded member 2 to which the four leg portions 11 to 14 are projection welded is a disk-shaped metal plate.
- the main body 10 has a central hole 15 indicated by a chain line.
- the central hole 15 is also used as a positioning hole as shown in FIG. In FIG. 1 (A), the first welding electrode 3 and the second welding electrode 4 apply pressure to the first welded member 1 and the second welded member 2 and energize the welding current.
- An electrode for general welding is shown.
- FIG. 1 (B) four long frames 21, 22 indicated by chain lines on the welded surface 20 of the second welded member 2 which is a base metal plate to which the carrier cover leg portions 11 to 14 are welded.
- Reference numerals 23 and 24 exemplify locations where the four leg portions 11 to 14 are projection welded respectively.
- the symbols W and L of the long frame 21 indicate the short side and the long side of the leg part 11, respectively.
- the central hole 25 formed in the center of the second member 2 to be welded is not directly related to the welding of the present invention and is provided for another purpose. It is also used as a positioning hole as shown in FIG. *
- leg portion 11 is shown as a representative of the four leg portions 11 to 14 of the carrier cover, but other leg portions 12, 13 are used for subdividing grooves, projection portions, stopper portions and the like to be described later.
- 14 is the same as the leg 11.
- the leg part 11 has a short side W which is the thickness direction and a long side L in the length direction.
- the long side L is preferably arcuate, but may be linear.
- the leg 11 of the first welded member 1 has a projection part P at the welded part. Although this projection part P is a general one, it will not be described.
- the projection part P and two subdivided grooves V1 and V2 extending to the leg part adjacent to the projection part P are formed.
- at least the projection part P is subdivided into three projection parts P1, P2, and P3.
- the subdivided grooves V1 and V2 are formed deeper than the projection portion P in the leg portion 11, and extend deeply to a portion adjacent to the projection portion P that does not contribute to welding.
- Stopper portions S1 and S2 are formed in the subdivided grooves V1 and V2, respectively.
- the stopper parts S1, S2 extend from the bottom surface to the subdivided grooves V1, V2 in the direction of the projection parts P1, P2, P3.
- the stopper parts S1, S2 have the same level height, and the projection parts P1, P2, P3 are melted until the stopper parts S1, S2 come into contact with the welded surface 20 of the second welded member 2 during welding.
- the stopper portions S1, S2 substantially determine the heights of the projection portions P1, P2, P3.
- the stopper portions S1 and S2 function to make the welding depth uniform and make the welding strength uniform. Further, since the subdivided grooves V1 and V2 also serve to store the molten metal material, the appearance of the welded portion is beautiful
- FIG. 2 in order to explain the influence of the skin effect on the welding current, the flow of the welding current is schematically shown by an arrow i.
- the thickness of the arrow i indicates whether the value of the welding current is large or small.
- the welding current flowing through each of the projection parts P1 to P3 is less affected by the skin effect, but as shown by the thickness of the arrow i, the skin effect in the direction of the long side L of each of the projection parts P1 to P3.
- the welding current flowing through the center of each of the projection portions P1, P2, and P3 decreases, and the welding current flowing through both ends tends to increase.
- the length of each of the projection parts P1, P2, and P3 is much smaller than 1/3 as compared with the length of the projection part P before subdivision as described above, the influence of the skin effect is considerable.
- the difference between the welding current flowing through the central portion and the welding current flowing at both ends of each projection portion P1, P2, and P3 is considerably reduced.
- the uniformity of the welding current flowing through each of the projection portions P1, P2, and P3 is improved.
- the welding current flowing through the central portion of the projection portion P2 located in the center is compared with the difference between the welding current flowing through the central portion of the projection portion P before subdivision and the welding current flowing through both end portions.
- the difference from the welding current flowing through the outer ends of the projection parts P1 and P3 is considerably reduced, and the equalization of the welding current flowing through each of the projection parts P1 to P3 is remarkably improved.
- the outer periphery of the main body 10 is endless. Therefore, the welding currents flowing through the four leg portions 11, 12, 13, and 14 are not affected by the skin effect, and the welding currents flowing through the four leg portions 11, 12, 13, and 14 are affected by the skin effect. The size does not vary with the skin effect.
- This welding apparatus includes, in addition to the first welding electrode 3 and the second welding electrode 4 described above, an AC power source 50 such as a commercial AC power source or an AC generator, and a DC power source circuit 60 that converts AC to DC. , An energy storage capacitor 70 composed of a plurality of capacitors connected in parallel, and a switch such as a discharge switch or an inverter circuit that discharges electrical energy stored in the energy storage capacitor 70 as one or more large current pulses
- a welding power source 200 including a circuit 80 and a welding transformer 90 having a secondary winding having one or two turns and a primary winding having a larger number of turns is provided.
- the first welding electrode 3 and the second welding electrode 4 are connected to the secondary winding of the welding transformer 90.
- this welding apparatus includes a positioning mechanism 100 that positions the first welded member 1 and the second welded member 2, and four leg portions 11, 12, 13, 14 of the first welded member 1.
- a deformation preventing mechanism 110 for preventing the outer deformation is provided.
- the positioning mechanism 100 and the deformation preventing mechanism 110 are made of an electrically insulating material or electrically insulated from other places so that a part of the welding current does not flow during welding. Note that illustration of a drive mechanism, a pressurizing mechanism, and the like that shorten or widen the distance between the first welding electrode 3 and the second welding electrode 4 is omitted. *
- a first welded member 1 and a second welded member 2 have the structures shown in FIGS.
- the positioning mechanism 100 includes a large diameter portion 101 having a diameter slightly smaller than the diameter of the central hole 25 of the second workpiece 2 and a diameter slightly smaller than the diameter of the central hole 15 of the first welded member 1.
- the small-diameter portion 102 is provided.
- the positioning mechanism 100 has a structure in which the small diameter portion 102 extends from the center of the upper surface of the large diameter portion 101, and the center of the small diameter portion 102 and the center of the large diameter portion 101 are on the central axis XY.
- FIG. 3 shows only the leg portion 11 among the leg portions 11 to 14 which are directly welded members, and a part of the main body portion 10 is cut out so that the small diameter portion 102 can be seen. *
- the large-diameter portion 101 of the positioning mechanism 100 is placed in the central hole 25 of the second welded member 2, and the second welded member 2 is placed at a predetermined position of the second welding electrode 4.
- the small diameter portion 102 of the positioning mechanism 100 is inserted into the central hole 15 of the first welded member 1, and the first welded member 1 is placed at a predetermined position of the second welded member 2.
- the four legs 11, 12, 13, 14 of the first welded member 1 are long frames 21, indicated by chain lines on the welded surface 20 of the second welded member 2 in FIG. It abuts at positions corresponding to 22, 23, and 24. In practice, as shown in FIG.
- the tip end surfaces of the three subdivided projection portions P ⁇ b> 1, P ⁇ b> 2, P ⁇ b> 3 of the leg portion 11 abut against the welded surface 20 of the second welded member 2.
- the leg parts 12, 13 and 14 are the same as the leg part 11.
- the deformation prevention mechanism 110 is not shown in detail, for example, four deformation-reducing / expanding members that move simultaneously in the radial inner direction or the radial outer direction are provided. These members are structured to prevent the corresponding leg portions 11, 12, 13, and 14 from being deformed outwardly by a predetermined deformation amount. However, the leg portions 11, 12, 13, and 14 are not substantially pressed radially inward so as not to hinder resistance welding. *
- the first welding electrode 3 is lowered, and pressure in the direction along the central axis XY is applied to the main body 10 of the first member 1 to be welded.
- pressure is applied between the three subdivided projection parts P1, P2, P3 of the leg parts 11, 12, 13, 14 and the welded surface 20 of the second welded member 2.
- the switch circuit 80 when the switch circuit 80 is turned on, the charge stored in the energy storage capacitor 70 in advance is discharged, and a single waveform welding current is subdivided into the legs 11, 12, 13, and 14, respectively. It flows between the three projection parts P1, P2, P3 and the welded surface 20 of the second welded member 2.
- the three subdivided projection parts P1, P2, P3 of the leg parts 11, 12, 13, 14 and the welded surface 20 of the second welded member 2 are in contact with each other.
- the nugget is formed by rapidly generating heat and melting and mixing both metal materials, and good projection welding is performed.
- the three subdivided projection parts P1, P2, and P3 of the leg parts 11 to 14 are melted.
- the stopper parts shown in FIG. S ⁇ b> 1 and S ⁇ b> 2 abut on the welded surface 20 of the second welded member 2.
- the stopper portions S1 and S2 not only perform the function of uniforming the welding depth and the welding strength, but also when the stopper portions S1 and S2 are in contact with the welded surface 20 of the second welded member 2.
- the welding current is still flowing through the weld, a part of the welding current is sidestreamed. This is useful for improving welding quality, welding strength, etc., even if the first member to be welded 1 and the second member to be welded 2 vary, the welded portion does not become overmelted.
- the welding current due to the influence of the skin effect is reduced. Size non-uniformity is significantly improved.
- the difference between the magnitude of the welding current flowing through the central portion of the projection portion P2 located at the center of each leg portion 11-14 and the magnitude of the welding current flowing through the outer end portion subdivides the projection portion P of the leg portions 11-14.
- the difference between the magnitude of the welding current flowing through the center of each of the legs 11 to 14 and the magnitude of the welding current flowing through both ends in the case where it is not changed is considerably small.
- the magnitude of the welding current refers to the peak value of the welding current or the amount of current that contributes to welding.
- each leg portion 11 It is possible to select the magnitude of the welding current flowing through the outer end portions of the projection portions P1 and P3 so that the outer end portions of the projection portions P1 and P3 of ⁇ 14 are not overmelted and a good nugget is formed. did it.
- the influence of the skin effect on the welding current is reduced by subdividing the projections of the legs 11 to 14 in this way, both the center and both ends of each leg 11 to 14 are satisfied.
- the resistance welding which can show the welding strength which can be done was enabled.
- the leg portion of the carrier cover is divided into four parts has been described. However, the carrier cover may be divided into almost equal parts, two parts, three parts, or five parts or more. *
- the first welded member 1 is a metal plate having a flat surface or a metal plate having a curved surface such as an arc shape or a wave shape.
- the thickness of the metal plate is sufficiently shorter than the length of the curved line. Therefore, the thickness surface of the metal plate is a straight or curved elongated surface.
- the thickness of the first member 1 to be welded is represented by the short side W, and the length of the plane or curved surface is represented by the long side L.
- the long side L is a straight line or a curve depending on the shape of the metal plate.
- the second welded member 2 is a metal member having a flat surface.
- the first welded member 1 is stud resistance welded to the flat surface of the second welded member 2.
- the projection parts P1, P2, P3, P4, P5, P6, and P7 subdivided into the welded parts indicated by the short side W and the long side L of the first welded member 1 are provided. These projection portions P1 to P7 are formed by subdividing the projections formed in the same manner as in the past with subdivided grooves V1, V2, V3, V4, V5, and V6.
- the subdivided grooves V1 to V6 are triangular.
- the second embodiment shows an example in which the subdivided grooves V1, V2, V3, V4, V5, and V6 are formed, basically any number of subdivided grooves depending on the length of the long side L is shown. Indicates that it may be provided. In FIG.
- the height H of the projection parts P1 to P7 is substantially equal to the depth of the subdivided grooves V1 to V6 as indicated by chain lines, but the groove width or the width can be adjusted by adjusting the inclination angle of the subdivided grooves V1 to V6.
- the depth of the groove can be easily adjusted.
- a large number of subdivided grooves can be easily formed at an arbitrary position, the influence of the skin effect can be further reduced, and the junction current can be made uniform.
- the projection part P is subdivided into seven projection parts P1 to P7 by the subdivided grooves V1 to V6, and considering the width of the subdivided grooves V1 to V6, L / 7 Therefore, the influence of the skin effect on the welding current can be greatly reduced, and the uniformity of the welding current flowing through each of the projection portions P1 to P7 can be improved. Therefore, according to this embodiment, the long side L of a straight line or a curve is set by setting the number of subdivided grooves and the groove width within a range in which the area to be welded capable of obtaining the required welding strength can be secured. However, it is possible to perform stud resistance welding of a considerably long metal plate to the second welded member 2. *
- the first member to be welded 1 is the same as the metal plate used in the second embodiment, but the projections at both ends are deleted, both ends are set as stoppers S1 and S2, and the heat capacity at both ends.
- the work which increases is performed.
- Space portions from which the projection portions at both ends are deleted are indicated by a1 and a2.
- the size of the space portions a1 and a2 is determined from the size of the welded portion area that can obtain a desired contact strength.
- the subdivided grooves V1, V2, V3, V4, and V5 subdivide the projection portion into projection portions P1, P2, P3, P4, P5, and P6.
- the subdivided grooves V1 to V5 are formed deeper than the projection portions P1 to P6. Note that v1 and v2 are escape grooves for storing a part of the projection parts P1 and P6 when they are melted.
- the third embodiment by dividing the projection part into the projection parts P1 to P6 by the subdividing grooves V1 to V5, as described above, the influence of the skin effect on the welding current is reduced and the projection parts P1 to The equalization of the welding current flowing through P6 is improved.
- the point of reducing the influence of the skin effect is the same as in the first and second embodiments.
- the main difference between the third embodiment and the first and second embodiments is that both end portions of the first workpiece 1 are set as stopper portions S1 and S2. *
- the shape of the subdivided groove is not particularly limited, and may be a structure that can be easily formed.
- the groove width and number of the subdivided grooves are not limited as long as a welded area capable of obtaining a required welding strength can be secured.
- the groove width of the subdivided grooves and the width in the long side L direction of each subdivided projection part may not be uniform.
- the groove width of the subdivided groove on the center portion side of the first member to be welded 1 may be made smaller than the both end sides to increase the amount of heat generated by the welding current on the center portion side.
- the second welded member has been described as a metal plate having a flat surface, but may be a metal pipe or the like.
- the long side L of the first member to be welded 1 is long, that is, the projection part is long, and it is not possible to cope with it simply by subdividing the projection part to reduce the influence of the skin effect, the pulse width of the welding current is increased.
- measures such as increasing the leakage inductance and circuit inductance of the welding transformer are effective.
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Abstract
Description
先ず、図1~図3により本発明の第1の実施の形態について説明する。第1の被溶接部材1は、前述した自動車のギア部におけるキャリアカバーであり、円形状の本体部10と本体部10からほぼ直角に曲がっている4つに分割された脚部11、12、13、14を有する金属部材である。これら4つの脚部11~14はほぼ等間隔で設けられており、大きさや形状もほぼ同等である。図1(A)では、脚部13が脚部11の陰になっており、見えない。4つの脚部11~14がプロジェクション溶接される第2の被溶接部材2は円板状の金属板である。本体部10には鎖線で示された中央穴15を有する。本発明では、中央穴15を図3で示すように位置決め穴としても利用する。なお、図1(A)において、第1の溶接電極3と第2の溶接電極4は第1の被溶接部材1と第2の被溶接部材2に加圧力を与えると共に、溶接電流を通電する一般的な溶接用の電極を示す。
次に、図4によって本発明に係る実施の形態2を説明する。第1の被溶接部材1は、平坦面を有する金属板、又は弧状や波状などの曲面を有する金属板である。その金属板の厚みは曲面の直線状又は曲線状の長さに比べて十分に短い。したがって、その金属板の厚みの面は直線状又は曲線状の細長い面である。第1の被溶接部材1の厚みを短辺Wで表し、平面又は曲面の長さを長辺Lで表す。長辺Lは前記金属板の形状による直線又は曲線になる。第2の被溶接部材2は平坦面を有する金属部材である。第1の被溶接部材1は第2の被溶接部材2の平坦面にスタッド抵抗溶接される。
次に、図5によって本発明に係る実施の形態3を説明する。第1の被溶接部材1は実施の形態2で用いた金属板と同様のものであるが、両端部のプロジェクション部を削除し、両端部をストッパ部S1、S2とすると共に、両端部の熱容量を増大させる働きを行わせる。両端部のプロジェクション部が削除された空間部分をa1、a2で示す。空間部分a1、a2の大きさは所望の当接強度を得ることができる被溶接部面積の大きさなどから決められる。細分化溝V1、V2、V3、V4、V5はプロジェクション部をプロジェクション部P1、P2、P3、P4、P5、P6に細分化する。細分化溝V1~V5はプロジェクション部P1~P6よりも深くまで形成されている。なお、v1、v2はプロジェクション部P1、P6が溶融したときにその一部分を収納する逃げ溝である。
10・・・第1の被溶接部材1であるキャリアカバーの本体部
11~14・・・第1の被溶接部材1であるキャリアカバーの脚部
15・・・前記キャリアカバーの本体部10の中央穴
W・・・第1の被溶接部材1の短辺
L・・・第1の被溶接部材1の長辺
P・・・第1の被溶接部材1のプロジェクション部
P1~P7・・・細分化されたプロジェクション部
V1~V6・・・プロジェクション部Pを細分化する細分化溝
S1、S2・・・第1の被溶接部材1のストッパ部
a1、a2・・・プロジェクション部Pの両端を削除した空間部分
2・・・第2の被溶接部材
20・・・第2の被溶接部材2の被溶接面
21~24・・・脚部11~14が溶接される箇所を示す長枠
25・・・第2の被溶接部材2となる円板状の金属板の中央穴
3・・・第1の溶接電極
4・・・第2の溶接電極
50・・・交流電源
60・・・直流電源回路
70・・・エネルギー蓄積用コンデンサ
80・・・スイッチ回路
90・・・溶接トランス
100・・・位置決め機構
101・・・位置決め機構100の大径部
102・・・位置決め機構100の小径部
110・・・変形防止機構
200・・・溶接用電源
i・・・溶接電流
v1、v2・・・溶融金属の逃げ溝
Claims (6)
- 短辺と該短辺よりも長い長辺とを有する被溶接部に細長いプロジェクション部を備える第1の被溶接部材を提供する工程と;
前記第1の被溶接部材と溶接により接合する第2の被溶接部材を提供する工程と;
前記プロジェクション部を前記第2の被溶接部材に接触させ、前記第1の被溶接部材と前記第2の被溶接部材とを抵抗溶接する工程とを備え;
前記プロジェクション部には前記短辺の方向に細分化溝が設けられ、前記プロジェクション部が細分化されており、前記細分化されたプロジェクション部を流れる溶接電流の前記長辺方向における電流値の均等化を向上させるように構成された;
溶接物品の製造方法。 - 前記細分化溝の内に、又は前記第1の被溶接部材の両端にストッパ部を備え、該ストッパ部が溶接終了時には前記第2の被溶接部材に当接して、溶接の進行を停止させると共に前記溶接電流の一部分を側流するように構成された;
請求項1に記載の溶接物品の製造方法。 - 前記細分化溝は、前記細分化溝の傾斜角度を変えることにより多分割される;
請求項1に記載の溶接物品の製造方法。 - 前記第1の被溶接部材はギア部における複数の脚部を備えるキャリアカバーであり、
前記第2の被溶接部材は前記ギア部におけるベース板であり、
前記複数の脚部はその先端面に前記細分化溝によって細分化された前記プロジェクション部を備え、
前記複数の脚部の前記細分化されたプロジェクション部を前記ベース板の被溶接部に抵抗溶接する請求項1又は請求項2に記載の製造方法。 - 前記第1の被溶接部材は平面又は曲面を有する金属板であり、該金属板の厚みが前記短辺であり、前記金属板の前記平面又は前記曲面の長さが前記長辺であり、前記金属板の被溶接部となる前記厚みの面に前記細分化溝によって細分化された前記プロジェクション部を複数備え、
前記金属板の前記細分化されたプロジェクション部を前記第2の被溶接部材の被溶接部に抵抗溶接する請求項1又は請求項2に記載の製造方法。 - ギア部における複数の脚部を備えるキャリアカバーとベース板とを抵抗溶接してなる溶接物品であって、
前記キャリアカバーのそれぞれの前記脚部は、前記ベース板に溶接される面に細分化された複数のプロジェクション部を備え、これら複数のプロジェクション部を前記ベース板の被溶接部に当接させて抵抗溶接してなることを特徴とする溶接物品。
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EP16748982.2A EP3257614B1 (en) | 2015-02-09 | 2016-01-19 | Method of manufacturing welded article and welded article |
US15/549,625 US10369654B2 (en) | 2015-02-09 | 2016-01-19 | Welded article and method for manufacturing welded article |
JP2016530260A JP5993110B1 (ja) | 2015-02-09 | 2016-01-19 | 溶接物品の製造方法及び溶接物品 |
CN201680009203.4A CN107405716B (zh) | 2015-02-09 | 2016-01-19 | 焊接物品的制造方法以及焊接物品 |
KR1020177024472A KR101920588B1 (ko) | 2015-02-09 | 2016-01-19 | 용접 물품의 제조 방법 및 용접 물품 |
US16/447,863 US20190299323A1 (en) | 2015-02-09 | 2019-06-20 | Welded article and method for manufacturing welded article |
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US10410754B2 (en) * | 2016-10-11 | 2019-09-10 | Bwxt Mpower, Inc. | Resistance pressure weld for nuclear reactor fuel rod tube end plug |
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Also Published As
Publication number | Publication date |
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KR101920588B1 (ko) | 2018-11-20 |
EP3257614B1 (en) | 2020-11-04 |
US10369654B2 (en) | 2019-08-06 |
JP5993110B1 (ja) | 2016-09-14 |
US20180043460A1 (en) | 2018-02-15 |
CN107405716A (zh) | 2017-11-28 |
JPWO2016129337A1 (ja) | 2017-04-27 |
US20190299323A1 (en) | 2019-10-03 |
EP3257614A1 (en) | 2017-12-20 |
EP3257614A4 (en) | 2019-01-23 |
CN107405716B (zh) | 2018-09-18 |
KR20170110662A (ko) | 2017-10-11 |
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