WO2014167614A1 - 接合構造体及びその接合方法 - Google Patents
接合構造体及びその接合方法 Download PDFInfo
- Publication number
- WO2014167614A1 WO2014167614A1 PCT/JP2013/007482 JP2013007482W WO2014167614A1 WO 2014167614 A1 WO2014167614 A1 WO 2014167614A1 JP 2013007482 W JP2013007482 W JP 2013007482W WO 2014167614 A1 WO2014167614 A1 WO 2014167614A1
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- WO
- WIPO (PCT)
- Prior art keywords
- cylindrical member
- thin cylindrical
- shaped groove
- caulking portion
- shaft member
- Prior art date
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- 238000005304 joining Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 53
- 230000002093 peripheral effect Effects 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims 1
- 238000002788 crimping Methods 0.000 abstract description 10
- 230000015572 biosynthetic process Effects 0.000 description 14
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
-
- 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
- B23P11/005—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by expanding or crimping
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/064—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable
- F16D1/072—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable involving plastic deformation
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
- F16D1/0852—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft
- F16D1/0858—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft due to the elasticity of the hub (including shrink fits)
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
- F16L13/146—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by an axially moveable sleeve
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/20—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members
- F16L33/207—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose
- F16L33/2071—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member
- F16L33/2073—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member directly connected to the rigid member
- F16L33/2076—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member directly connected to the rigid member by plastic deformation
-
- 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
- F16B17/00—Connecting constructional elements or machine parts by a part of or on one member entering a hole in the other and involving plastic deformation
- F16B17/004—Connecting constructional elements or machine parts by a part of or on one member entering a hole in the other and involving plastic deformation of rods or tubes mutually
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2300/00—Special features for couplings or clutches
- F16D2300/18—Sensors; Details or arrangements thereof
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
- F16L13/141—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by crimping or rolling from the outside
Definitions
- the present invention relates to a joining structure and a joining method thereof, and more particularly, to a joining structure by caulking joining between a shaft member and a thin cylindrical member and a joining method thereof.
- Patent Document 1 discloses as a joint structure for fitting a thin cylindrical member to a shaft member such as a solid shaft or a hollow shaft and caulking the thin cylindrical member and fixing the thin cylindrical member to the shaft member.
- a pipe joint is mentioned.
- a connecting pipe 103 (thin cylindrical member) is fitted on the outer circumference of a second pipe 102 (shaft member) fitted on the outer circumference of the first pipe 101.
- a plurality of locations in the axial direction of the connecting pipe 103 are caulked by caulking portions 104a and 104b.
- the connecting pipe 103 is gradually thinned from one end to the other end so that the caulking rate of the caulking portion 104a on the thin side is smaller than that of the caulking portion 104b on the thick side.
- the second tube 102 is prevented from coming out by the caulking portion 104b having the larger caulking rate.
- the caulking portion 104a having a smaller caulking rate prevents the second tube 102 from being cut due to tensile stress.
- the joint between the shaft member and the thin cylindrical member may be loosened due to the difference in linear expansion coefficient between the two members depending on the ambient temperature. It is possible that this will occur.
- an object of the present invention is to provide a bonded structure and a bonding method thereof that can suitably obtain the bonding strength between members constituting the bonded structure. There is to do.
- An embodiment of a joint structure for achieving the above object includes a shaft member, and a thin cylindrical member having an inner peripheral surface fitted to the outer peripheral surface of the shaft member,
- the thin-walled cylindrical member includes a first caulking portion that is radially reduced in an axial middle portion and caulked along a first V-shaped groove provided on a peripheral surface of the shaft member, and an end surface on an inner diameter side.
- a second caulking portion that is folded and caulked along a second V-shaped groove provided on the peripheral surface of the shaft member.
- the joint structure has a cross-sectional shape in which the second V-shaped groove is asymmetric in the axial direction, and the rounded-up angle on the end side that receives the thin-walled cylindrical member is larger than the rounded-up angle on the side opposite to the end part. It can be large.
- the second caulking portion may be formed only in a part of the end surface of the thin cylindrical member in the circumferential direction, or may be formed at equal intervals.
- the joining structure may be a metal in which the material of the shaft member and the material of the thin cylindrical member are different. Moreover, it is preferable that the lap
- the shaft member and the thin cylindrical member are fitted so that the outer peripheral surface of the shaft member and the inner peripheral surface of the thin cylindrical member are in contact with each other.
- the end surface of the thin cylindrical member is folded inward along the second V-shaped groove provided on the peripheral surface of the shaft member with the thin cylindrical member covering the second V-shaped groove.
- a second caulking portion forming step for forming the caulking portion may be formed only in a part of the end surface of the thin cylindrical member in the circumferential direction, or may be formed at equal intervals.
- FIG. 1 It is a fragmentary sectional view which shows the joining method by the 2nd crimping part of the joining method of a joining structure
- (a) is the state before a 2nd crimping part formation process in the aspect in which the 2nd V-shaped groove is not covered with the thin cylindrical member.
- the figure shown (b) is the figure which showed the state after a 2nd crimp part formation process.
- the angle is 60 ° and 30 °.
- (A) is a fragmentary sectional view which shows the positional relationship of the 2nd V-shaped groove
- (b) is a graph which shows the joint strength in the rotation direction of a shaft member and a thin-walled cylindrical member. It is a fragmentary sectional view which shows the structure of the conventional junction structure.
- FIG. 1 is a perspective view showing a configuration in an embodiment of a joint structure according to the present invention.
- FIG. 2 is a partial cross-sectional view showing a configuration in an embodiment of the joint structure according to the present invention.
- FIG. 3 is a partial cross-sectional view of the main part showing the configuration in an embodiment of the joint structure according to the present invention.
- the joining structure 1 of the present embodiment includes a shaft member 10 and a thin cylindrical member 20 in which an inner peripheral surface is fitted to the outer peripheral surface of the shaft member 10.
- the shaft member 10 is provided with a plurality of V-shaped grooves 11 in the axial direction over the entire circumference. These V-shaped grooves 11 are provided in the order of the first V-shaped groove 11A and the second V-shaped groove 11B from the end portion that receives the thin cylindrical member 20, for example.
- the thin-walled cylindrical member 20 includes a first caulking portion 21 that is radially crimped along the first V-shaped groove 11A of the shaft member 10 and an end surface 20a that is bent into the inner diameter side. And a second caulking portion 22 that is caulked along the second V-shaped groove 11B of the member 10.
- each of the first caulking portion 21 and the second caulking portion 22 is provided over the entire circumference of the thin cylindrical member 20.
- the first caulking portion is not limited to machining by mechanical caulking, but may be a constricted portion approximately along the first V-shaped groove, such as a diameter reducing method using electromagnetic force.
- the second V-shaped groove 11B has an axially asymmetric cross-sectional shape, and the rounded-up angle on the end side that receives the thin cylindrical member 20 is set to be larger than the rounded-up angle on the side opposite to the above-mentioned end. Is preferable (see FIGS. 7A and 7B).
- FIG. 4 is a partial cross-sectional view showing a state before the second caulking portion forming step in an embodiment of the bonding structure bonding method.
- FIG. 5 is a partial cross-sectional view of the main part showing a state before the second caulking part forming step in an embodiment of the joining method of the joined structure.
- FIG. 6 is a diagram showing a process in an embodiment of a joining method of a joined structure, (a) is a diagram showing a state before a second caulking part forming process, and (b) is a second caulking part.
- FIG. 7 is a partial cross-sectional view showing a joining method using a second caulking portion in an embodiment of the joining method of the joined structure, (a) is a diagram showing a state before the second caulking portion forming step, (B) is the figure which showed the state after a 2nd crimp part formation process.
- the joining method of the joint structure of the present embodiment is performed after the shaft member 10 and the thin cylindrical member 20 are fitted so that the outer peripheral surface of the shaft member 10 and the inner peripheral surface of the thin cylindrical member 20 are in contact with each other. It includes a first caulking part forming step and a second caulking part forming step.
- First caulking portion forming step> In the first caulking portion forming step, as shown in FIG. 4, a first V-shaped groove 11 ⁇ / b> A of the shaft member 10 is formed by radially reducing the axial intermediate portion of the thin cylindrical member 20 fitted to the shaft member 10. It is the process of forming the 1st crimping part 21 by crimping along.
- ⁇ Second caulking part forming step> Further, in the second caulking portion forming step, as shown in FIG. 5, the end surface 20a of the thin cylindrical member 20 is placed on the inner diameter side of the thin cylindrical member 20 with the thin cylindrical member 20 covering the second V-shaped groove 11B. This is a step of forming the second caulking portion 22 by folding and caulking along the second V-shaped groove 11B of the shaft member 10.
- the thin cylindrical member 20 before folding the end surface 20 a to the inner diameter side completely covers the first V-shaped groove 11 ⁇ / b> A provided in the shaft member 10. It is fitted to the outer periphery of the shaft member 10 to the extent, and is folded while being compressed from this state. By doing so, stress in the compression direction remains between the first caulking portion 21 and the second caulking portion 22.
- the second caulking portion forming step is performed using a mold 30 as shown in FIG.
- the mold 30 is an annular member, and the inner peripheral surface 31 includes a large diameter portion 31A having an inner diameter substantially equal to the outer diameter of the thin cylindrical member 20, and a small diameter portion having an inner diameter substantially equal to the inner diameter of the thin cylindrical member 20a. 31B and 31 C of taper surfaces which connect them.
- the large-diameter portion 31A, the small-diameter portion 31B, the tapered surface 31C, and the connecting portion are configured with smooth curved surfaces.
- first as shown in FIG.
- the mold 30 is placed so that the large-diameter portion 31A contacts the outer peripheral surface of the thin cylindrical member 20 and the small-diameter portion 31B contacts the outer peripheral surface of the shaft member 10.
- the shaft member 10 and the thin cylindrical member 20 are fitted and inserted until the end portion 20a is caught by the tapered surface 31C.
- the mold 30 is moved from the second V-shaped groove 11 ⁇ / b> B of the shaft member 10 to the first V from the state in which the end 20 a is hooked on the tapered surface 31 ⁇ / b> C. Pushing in the direction of the groove 11A, the end surface 20a of the thin cylindrical member 20 is folded into the inner diameter side (inside the second V-shaped groove 11B).
- FIG. 7A shows a state before the thin cylindrical member 20 is folded into the inner diameter side of the thin cylindrical member 20 with the thin cylindrical member 20 covering the second V-shaped groove 22.
- FIG. 7B shows a state after the end surface 20 a is folded to the inner diameter side of the thin cylindrical member 20.
- the first caulking portion 21 that has been crimped by reducing its diameter is spring-backed to form the first V-shaped groove 11A. From the surface. In this state, the contact surface pressure between the first V-shaped groove 11A and the first caulking portion 21 of the thin-walled cylindrical member 20 is low, and the joining force due to this is small.
- the end surface 20a of the thin cylindrical member 20 is compressed while being folded into the inner diameter side (in the second V-shaped groove 11B), and is lifted by the spring back.
- One side surface of the first caulking portion 21 is in surface contact with the side surface of the first V-shaped groove 11 ⁇ / b> A, and the contact surface is secured together with the second caulking portion 22.
- the thin cylindrical member 20 is folded while being compressed, a corresponding surface pressure is generated on each contact surface, thereby making it possible to obtain bonding strength.
- FIG. 8 is a fragmentary sectional view which shows the joining method by the 2nd crimping part of the joining method of a joining structure, (a) is the 2nd crimping part formation process in the aspect in which the 2nd V-shaped groove is not covered with the thin cylindrical member. The figure which showed the previous state, (b) is the figure which showed the state after a 2nd crimp part formation process. As shown in FIGS.
- the thin cylindrical member 20 does not completely cover the second V-shaped groove 11B, and the end portion 20a is folded from a state where a part of the second V-shaped groove 11B is exposed. Then, no stress in the compression direction remains between the first caulking portion 21 and the second caulking portion 22, and the first caulking portion 21 remains in a state of being lifted by the spring back. That is, in such a state, the contact surface between the shaft member 10 and the thin cylindrical member 20 is not suitably secured, and there is a possibility that the bonding strength is reduced and variations occur.
- FIG. 9 and FIG. 10 are perspective views showing a configuration in another embodiment of the bonded structure.
- FIG. 11 is a partial cross-sectional view showing the configuration of the first caulking portion in another embodiment of the bonded structure.
- FIG. 11A shows a case where the round-up angle of the first V-shaped groove is 45 °, and FIG. This is the case where the first V-shaped groove has a round-up angle of 60 ° and 30 °.
- the description of the same configuration as the above-described embodiment is omitted. As shown in FIGS.
- the second caulking portion 23 is formed not on the entire circumference of the end surface 20 a of the thin cylindrical member 20 but only on a part in the circumferential direction of the end surface 20 a.
- the second caulking portions 23 having such an aspect are preferably formed at equal intervals in the circumferential direction of the thin cylindrical member 20.
- the width dimension in the circumferential direction of one second caulking portion 22 is set to about 5% of the entire circumferential dimension of the thin-walled cylindrical member 20, and the second caulking portion 23 formed in this way is thin-walled. You may form in three places and equal distribution in the circumferential direction of the cylindrical member 20.
- the width dimension in the circumferential direction of one second caulking portion 23 is about 8% of the entire circumferential dimension of the thin-walled cylindrical member 20, and the second caulking portion 23 formed in this way is thin-walled. You may form in four places and equal distribution in the circumferential direction of the cylindrical member 20.
- the 1st crimping part 22 when the 2nd crimping part 22 is formed in the perimeter of the end surface 20a of the thin cylindrical member 20 like embodiment (refer FIG. 1) mentioned above, depending on the structure of the joining structure 1, the 1st crimping part The stress remaining between 21 and the second caulking portion 22 may be excessive. Such excessive stress in the thin cylindrical member 20 causes creep in a high temperature environment.
- a plurality of second caulking portions 23 are partially formed on the end surface 20a, and even in such a bonded structure 1, the stress due to the second caulking portions 23 is adjusted to obtain an appropriate bonding strength. Obtainable.
- the second caulking portion 23 is partially formed, the compressive force generated between the first V-shaped groove 11A and the second V-shaped groove 11B is prevented from becoming excessive even when the engagement allowance is increased. be able to.
- the first V-shaped groove 11A is joined by making the cross-sectional shape along the axial direction an asymmetric shape similar to that of the second V-shaped groove 11B.
- the bonding strength of the structure 1 may be controlled.
- the cross-sectional shape along the axial direction of the first V-shaped groove 11A is usually a rounded-up angle (45 °) symmetrical to the axial direction.
- the cross-sectional shape along the axial direction of the first V-shaped groove 11A is an asymmetrical cross-sectional shape in the axial direction, and the end 20a that receives the thin cylindrical member 20 is received.
- the rounding angle ⁇ on the side may be larger than the rounding angle ⁇ on the side opposite to the end 20a.
- the depth dimension of the first V-shaped groove 11A is substantially equal to the thickness of the thin cylindrical member 20 regardless of whether the axial cross-sectional shape is symmetric or asymmetric.
- the depth dimension of the second V-shaped groove 11 ⁇ / b> B is set smaller than the thickness of the thin cylindrical member 20. This is because the thin cylindrical member 20 is sufficiently press-fitted into the second V-shaped groove 11B when the second caulking portion 22 is formed using the mold 30 (see FIG. 6) as described above. If the depth dimension of the groove 11B is larger than the thickness of the thin cylindrical member 20, a gap may be generated between the second V-shaped groove 11B and the thin cylindrical member 20, and it may be difficult to obtain the bonding strength of the bonded structure 1. . As shown in FIGS.
- the cross-sectional shape along the axial direction of the first V-shaped groove 11A is symmetric in the axial direction (the groove side surface is a tapered shape).
- a large contact area between the side surface and the shaft member 10 can be secured.
- FIG. 11B when the rounding angle ⁇ on the side opposite to the end portion 20a is reduced, a corresponding joint strength can be obtained by the wedge effect.
- the above-described embodiment may be used for a torque sensor that detects a torque generated on a rotating shaft.
- a torque sensor is a torque sensor having the following configuration (see, for example, Japanese Patent Laid-Open No. 11-248562). That is, the torque sensor is formed of a non-magnetic material that is electrically conductive and non-magnetic with the first and second rotating shafts arranged coaxially and connected via a torsion bar. The cylindrical member integrated with the said 2nd rotating shaft and the rotation direction so that the outer peripheral surface of a shaft may be surrounded.
- At least the cylindrical member of the first rotating shaft surrounded by the cylindrical member is made of a magnetic material, and a groove extending in the axial direction is formed on the surrounded portion. Further, the cylindrical member is formed with a window so that the degree of overlap with the groove changes according to the relative rotational position with respect to the first rotating shaft. And torque is detected based on the inductance of the coil arrange
- the holding force of the cylindrical member on the rotating shaft varies depending on the temperature, and as a result of the decrease in the holding force, the rotational position and the axial position of the cylindrical member with respect to the rotating shaft are There is room for studying that the detection accuracy is lowered due to the deviation.
- FIG. 12 is a graph showing the bonding strength of the shaft member 10 and the thin cylindrical member 20 in the rotational direction.
- the vertical axis shows the relative torque between the shaft member 10 and the thin cylindrical member 20, and the horizontal axis shows the shaft member.
- the relative angle between 10 and the thin cylindrical member 20 is shown.
- the broken lines indicate the evaluation results when the thin cylindrical member 20 is crimped by reducing the diameter of the thin cylindrical member 20 in the V-shaped groove 11 provided in the shaft member 10.
- the solid line indicates the evaluation result of the joint structure 11 of the embodiment shown in FIG.
- the bonded structure to be evaluated is obtained by bonding a thin cylindrical member 20 made of aluminum having a plate thickness of less than 1 mm to a steel shaft member 10 having an outer diameter of ⁇ 27 mm. Further, this evaluation is a result of applying torque to the joint portion (first caulking portion 21 and second caulking portion 22) until the relative twist angle after unloading the torque reaches a specified amount.
- FIG. 13A is a partial cross-sectional view showing the positional relationship between the V-shaped groove 11 (the first V-shaped groove 11A and the second V-shaped groove 11B) and the thin cylindrical member 20, as in FIGS.
- FIG.13 (b) is a graph which shows the joining strength in the rotation direction of a shaft member and a thin cylindrical member.
- the evaluation result of the joining structure 1 folded from the state of "" is shown.
- the solid line indicates the evaluation result of the joined structure 1 in which the lapping allowance ⁇ is folded from a state equivalent to the thickness t of the thin cylindrical member 20.
- a bonding structure having a larger lapping margin tends to have a higher bonding strength.
- the lapping margin is set to be equal to or less than the thickness t of the thin cylindrical member 20.
- the first caulking portion 21 is provided in the middle portion of the thin cylindrical member 20 and the thin cylindrical member is provided.
- a second caulking portion 22 in which the end surface 20a of the member 20 is folded to the inner diameter side is provided.
- the second caulking portion 22 is formed while compressing the thin cylindrical member 20, so that the second caulking portion 22 is compressed in the compression direction inside the thin cylindrical member 20 (between the first caulking portion 21 and the second caulking portion 22). Stress remains, and as a reaction force, surface pressure is generated on the contact surface between the shaft member 10 and the thin cylindrical member 20. Due to this contact surface pressure, a corresponding frictional force is generated between the shaft member 10 and the thin cylindrical member 20, and a joint strength in the rotational direction can be obtained.
- the first caulking portion 21 and the first caulking portion 21 Since the stress in the compression direction remains between the two caulking portions 22, the thin cylindrical member 20 is caulked and joined to the shaft member 10 as long as it is within a certain range even if an expansion difference occurs due to a change in ambient temperature. Is very rarely loosened.
- the bonded structure and the bonding method thereof have been described.
- the bonded structure and the bonding method according to the present invention are not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention. Is possible. For example, detailed conditions such as the shape of the V-shaped groove, the shape of the second caulking portion, and the number of the second caulking portions can be changed within a range in which the function of the present invention is exhibited.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Insertion Pins And Rivets (AREA)
- Standing Axle, Rod, Or Tube Structures Coupled By Welding, Adhesion, Or Deposition (AREA)
- Forging (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
Description
特許文献1の管継手は、図14に示すように、第1管101の外周に嵌め込まれる第2管102(軸部材)の外周に、連結管103(薄肉円筒部材)が嵌め込まれている。そして、連結管103の軸長方向の複数箇所が、かしめ部104a,104bでかしめられている。
連結管103は、一端部側から他端部にかけて漸次薄肉として、薄肉側のかしめ部104aのかしめ率を厚肉側のかしめ部104bのかしめ率よりも小さくしている。その結果、かしめ率が大きい方のかしめ部104bにより、第2管102の抜け出しを防止している。一方、かしめ率が小さい方のかしめ部104aにより、第2管102の引張応力による切断を防ぐようにしている。
例えば、薄肉円筒部材を縮径して軸部材にかしめ接合する場合、両者の接触面の摩擦力で接合されることになる。しかし、このような接合状態においては、薄肉円筒部材のスプリングバックがあるため、薄肉円筒部材と軸部材との接触面圧を適当に管理するのが難しく、接合強度の保証が困難となっていた。
特に、軸部材と、薄肉円筒部材とが、鋼材とアルミといった異なった素材であった場合、これら軸部材と薄肉円筒部材との接合では、雰囲気温度によっては2部材の線膨張係数差により緩みが生じることが考えられる。
そこで、本発明は上記の問題点に着目してなされたものであり、その目的は、接合構造体を構成する部材間の接合強度を好適に得ることができる接合構造体及びその接合方法を提供することにある。
上記薄肉円筒部材は、軸方向の中間部を径方向に縮径されて上記軸部材の周面に設けられた第1V字溝に沿ってかしめられた第1かしめ部と、端面を内径側に折り込んで上記軸部材の周面に設けられた第2V字溝に沿ってかしめられた第2かしめ部とを有する。
ここで、上記接合構造体は、第2V字溝が軸方向に非対称な断面形状をなし、上記薄肉円筒部材を受容する端部側の切上げ角が、上記端部と反対側の切上げ角よりも大きくてもよい。
また、上記接合構造体は、上記軸部材の材料と、上記薄肉円筒部材の材料とが異なる金属であってもよい。
また、上記接合構造体は、第2V字溝と上記薄肉円筒部材とのラップ代が、上記薄肉円筒部材の肉厚以下であることが好ましい。
上記薄肉円筒部材の軸方向の中間部を径方向に縮径して上記軸部材の周面に設けられた第1V字溝に沿ってかしめられた第1かしめ部を形成する第1かしめ部形成工程と、
上記薄肉円筒部材の端面を、上記薄肉円筒部材が第2V字溝を覆った状態で、内径側に折り込んで上記軸部材の周面に設けられた第2V字溝に沿ってかしめられた第2かしめ部を形成する第2かしめ部形成工程とを含む。
ここで、上記接合構造体の接合方法は、上記薄肉円筒部材の端面の周方向の一部のみに第2かしめ部を形成してもよく、等間隔で形成してもよい。
(接合構造体)
図1は、本発明に係る接合構造体のある実施形態における構成を示す斜視図である。また、図2は、本発明に係る接合構造体のある実施形態における構成を示す部分断面図である。また、図3は、本発明に係る接合構造体のある実施形態における構成を示す要部の部分断面図である。
図1~3に示すように、本実施形態の接合構造体1は、軸部材10と、該軸部材10の外周面に内周面を嵌合させた薄肉円筒部材20とを有する。
軸部材10は、その周面全周にわたって軸方向に複数のV字溝11が設けられている。これらV字溝11は、例えば、薄肉円筒部材20を受容する端部から第1V字溝11A,第2V字溝11Bの順で設けられている。
また、第2V字溝11Bは、軸方向に非対称な断面形状をなし、薄肉円筒部材20を受容する端部側の切上げ角が、上記端部と反対側の切上げ角よりも大きく設定されることが好ましい(図7(a),(b)参照)。
次に、図1~3に示す接合構造体の接合方法について説明する。
図4は、接合構造体の接合方法のある実施形態における第2かしめ部形成工程前の状態を示す部分断面図である。また、図5は、接合構造体の接合方法のある実施形態における第2かしめ部形成工程前の状態を示す要部の部分断面図である。
また、図6は、接合構造体の接合方法のある実施形態における工程を示す図であり、(a)は第2かしめ部形成工程前の状態を示した図、(b)は第2かしめ部形成工程の状態を示した図、(c)は第2かしめ部形成工程後の状態を示した図である。また、図7は、接合構造体の接合方法のある実施形態における第2かしめ部による接合方法を示す部分断面図であり、(a)は第2かしめ部形成工程前の状態を示した図、(b)は第2かしめ部形成工程後の状態を示した図である。
<第1かしめ部形成工程>
第1かしめ部形成工程は、図4に示すように、軸部材10に嵌合させた薄肉円筒部材20の軸方向の中間部を径方向に縮径して軸部材10の第1V字溝11Aに沿ってかしめて第1かしめ部21を形成する工程である。
また、第2かしめ部形成工程は、図5に示すように、薄肉円筒部材20の端面20aを、薄肉円筒部材20が第2V字溝11Bを覆った状態で、薄肉円筒部材20の内径側に折り込んで軸部材10の第2V字溝11Bに沿ってかしめて第2かしめ部22を形成する工程である。
ここで、第2かしめ部形成工程においては、図5に示すように、端面20aを内径側に折込む前の薄肉円筒部材20が、軸部材10に設けた第1V字溝11Aを完全に覆う範囲まで軸部材10の外周に嵌合されており、この状態から、圧縮を伴いながら折込まれる。このようにすることで、第1かしめ部21と第2かしめ部22との間で圧縮方向の応力が残ることになる。
第2かしめ部形成工程では、まず、図6(a)に示すように、第1かしめ部形成工程後の軸部材10及び薄肉円筒部材20に対して、金型30の軸方向と軸部材10及び薄肉円筒部材20の軸方向とを合わせて金型30をセットする。
次に、図6(c)に示すように、テーパ面31Cに端部20aが引っ掛かった状態から、薄肉円筒部材20に対して金型30を、軸部材10の第2V字溝11Bから第1V字溝11Aの向きに押し込み、薄肉円筒部材20の端面20aを内径側(第2V字溝11B内)に折込む。
このとき、前述したように、薄肉円筒部材20を圧縮しながら折込んだことで、各接触面には相応の面圧が発生し、これにより接合強度を得ることが可能となる。
図8は、接合構造体の接合方法の第2かしめ部による接合方法を示す部分断面図であり、(a)は第2V字溝を薄肉円筒部材が覆ってない態様で第2かしめ部形成工程前の状態を示した図、(b)は第2かしめ部形成工程後の状態を示した図である。
図8(a),(b)に示すように、薄肉円筒部材20が第2V字溝11Bを完全に覆わず、第2V字溝11Bの一部が露出した状態から端部20aの折込みを行うと、第1かしめ部21と第2かしめ部22との間で圧縮方向の応力が残ることがなく、第1かしめ部21もスプリングバックにて浮き上がった状態のままとなる。すなわち、このような状態では、軸部材10と薄肉円筒部材20との接触面が好適に確保されず、接合強度の低下や、ばらつきが発生するおそれがある。
図9,図10は、接合構造体の他の実施形態における構成を示す斜視図である。また、図11は、接合構造体の他の実施形態における第1かしめ部の構成を示す部分断面図であり、(a)は第1V字溝の切り上げ角が45°の場合、(b)は第1V字溝の切り上げ角が60°及び30°の場合である。なお、本実施形態の説明においては、前述した実施形態と重複する構成についての説明を省略する。
図9,図10に示すように、本実施形態では、第2かしめ部23が、薄肉円筒部材20の端面20aの全周ではなく、端面20aの周方向の一部のみに形成されている。このような態様の第2かしめ部23は、薄肉円筒部材20の周方向に等間隔で形成されることが好ましい。
ここで、上述した実施形態(図1参照)のように、薄肉円筒部材20の端面20aの全周に第2かしめ部22を形成した場合、接合構造体1の構造によっては、第1かしめ部21と第2かしめ部22との間に残る応力が過大になることがある。このような薄肉円筒部材20の内部の過大な応力は、高温環境下でのクリープの原因となる。
ここで、第1V字溝11Aの深さ寸法は、軸方向の断面形状が対称形状、非対称形状のいずれであっても、薄肉円筒部材20の厚みと略同等である。
図11(a),(b)に示すように、第1V字溝11Aの軸方向に沿った断面形状を軸方向に対称(溝側面はテーパ形状)にすることで、第1V字溝11Aの側面と軸部材10の接触面積を大きく確保できる。また、図11(b)のように、端部20aと反対側の切上げ角δを小さくすると、くさび効果によって相応の接合強度を得ることができる。
このような構成のトルクセンサにおいては、円筒部材の回転軸への保持力が温度によって変動してしまい、その保持力が低下する結果として、回転軸に対する円筒部材の回転方向位置や軸方向位置がずれてしまい、検出精度が低下することについて検討の余地があった。
図12は、軸部材10と薄肉円筒部材20との回転方向における接合強度を示すグラフであり、縦軸に軸部材10と薄肉円筒部材20との間の相対トルクを示し、横軸に軸部材10と薄肉円筒部材20との相対角度を示している。
なお、図12中、破線は、軸部材10に設けたV字溝11に薄肉円筒部材20を縮径してかしめたときの評価結果を示すものである。また、図12中、実線は、図8に示した実施形態の接合構造体11の評価結果を示したものである。
ここで、評価対象とした接合構造体は、外径がφ27mmの鋼製の軸部材10に板厚1mm未満のアルミニウム製の薄肉円筒部材20を接合したものである。また、この評価は、トルクを除荷した後の相対ねじれ角が規定量になるまで、接合部(第1かしめ部21及び第2かしめ部22)にトルクを負荷した結果である。
図13(a)は、図7,8と同様に、V字溝11(第1V字溝11A及び第2V字溝11B)と薄肉円筒部材20との位置関係を示す部分断面図である。また、図13(b)は、軸部材と薄肉円筒部材との回転方向における接合強度を示すグラフである。具体的には、軸部材10と薄肉円筒部材20との回転方向における接合強度を示したグラフであり、軸部材10と薄肉円筒部材20との間の相対トルクを縦軸に示し、軸部材10と薄肉円筒部材20との相対角度を縦軸に示している。
図13に示すように、ラップ代が大きい接合構造体の方が、接合強度が高くなる傾向が認められる。これは、第2かしめ部22と第2V字溝11Bとの間に発生する応力の差によるものであり、ラップ代の調整により接合強度を所定の範囲内で調整できることを示している。
なお、上記ラップ代を一定量以上にした状態から折り込みを行うと、薄肉円筒部材20が第2V字溝11Bの内部に向かって折り込まれる前に座屈したり、第1かしめ部21にかかる荷重が過大となり、所望の保持力が得られないといった不具合を生じることがある。このことから、上記ラップ代は、薄肉円筒部材20の肉厚t以下に設定されることが好ましい。
そして、第2かしめ部22の形成は、薄肉円筒部材20を圧縮しながら行うことで、薄肉円筒部材20の内部(第1かしめ部21と第2かしめ部22との間)に、圧縮方向の応力が残り、その反力として軸部材10と薄肉円筒部材20との接触面には面圧が生じる。
この接触面圧によって、軸部材10と薄肉円筒部材20との間には相応の摩擦力が発生し、回転方向の接合強度を得ることができる。
以上、接合構造体及びその接合方法について説明したが、本発明に係る接合構造体及びその接合方法は上記実施形態に限定されるものではなく、本発明の趣旨を逸脱しなければ種々の変形が可能である。例えば、V字溝の形状、第2かしめ部の形状、第2かしめ部の数といった詳細な条件については、本発明の機能を発揮する範囲で変更可能である。
10 軸部材
11A 第1V字溝
11B 第2V字溝
20 薄肉円筒部材
20a 端部
21 第1かしめ部
22 第2かしめ部
23 第2かしめ部
Claims (9)
- 軸部材と、該軸部材の外周面に内周面を嵌合させた薄肉円筒部材とを有し、
前記薄肉円筒部材は、軸方向の中間部を径方向に縮径されて前記軸部材の周面に設けられた第1V字溝に沿ってかしめられた第1かしめ部と、端面を内径側に折り込んで前記軸部材の周面に設けられた第2V字溝に沿ってかしめられた第2かしめ部とを有することを特徴とする接合構造体。 - 第2V字溝は、軸方向に非対称な断面形状をなし、前記薄肉円筒部材を受容する端部側の切上げ角が、前記端部と反対側の切上げ角よりも大きいことを特徴とする請求項1に記載の接合構造体。
- 第2かしめ部は、前記薄肉円筒部材の端面の周方向の一部のみに形成されたことを特徴とする請求項1又は2に記載の接合構造体。
- 第2かしめ部は、前記薄肉円筒部材の端面の周方向に、等間隔で形成されたことを特徴とする請求項3に記載の接合構造体。
- 前記軸部材の材料と、前記薄肉円筒部材の材料とが異なる金属よりなることを特徴とする請求項1~4の何れか一項に記載の接合構造体。
- 第2V字溝と前記薄肉円筒部材とのラップ代が、前記薄肉円筒部材の肉厚以下であることを特徴とする請求項1~5の何れか一項に記載の接合構造体。
- 軸部材の外周面と薄肉円筒部材の内周面とが当接するように前記軸部材と前記薄肉円筒部材とを嵌合させ、
前記薄肉円筒部材の軸方向の中間部を径方向に縮径して前記軸部材の周面に設けられた第1V字溝に沿ってかしめられた第1かしめ部を形成する第1かしめ部形成工程と、
前記薄肉円筒部材の端面を、前記薄肉円筒部材が第2V字溝を覆った状態で、内径側に折り込んで前記軸部材の周面に設けられた第2V字溝に沿ってかしめられた第2かしめ部を形成する第2かしめ部形成工程とを含むことを特徴とする接合構造体の接合方法。 - 第2かしめ部形成工程は、前記薄肉円筒部材の端面の周方向の一部のみに第2かしめ部を形成することを特徴とする請求項7に記載の接合構造体の接合方法。
- 第2かしめ部形成工程は、第2かしめ部を、前記薄肉円筒部材の端面の周方向に、等間隔で形成することを特徴とする請求項8に記載の接合構造体の接合方法。
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- 2013-12-19 EP EP13881542.8A patent/EP2985503B1/en active Active
- 2013-12-19 CN CN201380003100.3A patent/CN104395662B/zh active Active
- 2013-12-19 US US14/782,697 patent/US10550978B2/en active Active
- 2013-12-19 JP JP2015510961A patent/JP6299752B2/ja active Active
- 2013-12-19 WO PCT/JP2013/007482 patent/WO2014167614A1/ja active Application Filing
- 2013-12-19 BR BR112015025604-0A patent/BR112015025604B1/pt active IP Right Grant
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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EP3120952A1 (en) * | 2015-07-22 | 2017-01-25 | Tirsan Kardan Sanayi Ve Ticaret Anonim Sirketi | An alternative joining method in torque transmission |
US20220290788A1 (en) * | 2020-03-10 | 2022-09-15 | Hanon Systems | Mechanical orientation control heater hose assembly for quick connect |
Also Published As
Publication number | Publication date |
---|---|
EP2985503A4 (en) | 2016-11-23 |
BR112015025604A2 (pt) | 2020-10-27 |
JPWO2014167614A1 (ja) | 2017-02-16 |
EP2985503A1 (en) | 2016-02-17 |
US20160047501A1 (en) | 2016-02-18 |
CN104395662A (zh) | 2015-03-04 |
US10550978B2 (en) | 2020-02-04 |
EP2985503B1 (en) | 2019-02-13 |
JP6299752B2 (ja) | 2018-03-28 |
CN104395662B (zh) | 2016-05-11 |
BR112015025604B1 (pt) | 2021-02-23 |
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