JP4092794B2 - Joining method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  In the present invention, a member made of aluminum or an aluminum alloy (hereinafter simply referred to as aluminum) is softened and agitated by frictional heat generated by a friction pin entering while rotating.1The present invention relates to a joining method in which one or two members are joined to another member via a friction pin.
[0002]
[Prior art]
  In general, arc welding or spot welding is used as a method of joining two members together at a point portion, and stud welding is used as a method of implanting a bolt on the surface of the member.
  For example, as shown in FIG. 7A, when the two members 20 and 22 are overlapped and partially joined using arc welding, arc discharge is performed on the portion to be joined by the electrode A. Next, by stopping the arc discharge in a state where both the members 20 and 22 are melted from the front surface side member 20 to the back surface side member 22, the melted portion M straddling both the members 20 and 22 is solidified. 22 is joined at a point portion.
  In the case of this arc welding, it is necessary to melt until it reaches the rear surface side member 22 from the front surface side member 20, and since the deformation of both members 20 and 22 and the rough surface shape due to melting occur due to the heat effect of welding, A specialist engineer was required.
[0003]
  In the spot welding, as shown in FIG. 7B, the front side member 24 and the back side member 26 are sandwiched between a pair of electrodes 28, and a current flows between the electrodes 28 and 28. As a result, resistance heat is generated in the vicinity of the joint surfaces of the members 24 and 26, and as shown in FIG. 7C, a nugget G is formed between the members 24 and 26, and the members 24 and 26 are overlapped. Can be partially joined. In addition, the code | symbol S in a figure shows the impression by the said electrode 28. FIG.
  By the way, with the reduction in weight of automobiles and vehicles, application of aluminum to various parts is being studied. However, in the spot welding, at least one member needs to be thin, and when the thickness of the members 24 and 26 to be joined becomes thick, it cannot be welded by a spot welder, and in the case of aluminum Since a large current is required, it is necessary to provide the welding machine with a large power supply device. Therefore, the two aluminum members (24, 26) are not suitable for simple point joining.
[0004]
  Further, in the stud welding, as shown in FIG. 7D, a bolt 32 made of the same material as that of the member 30 is brought into contact with the surface of the member 30 via a chuck 34 and a base 36. Next, when an arc is generated between the bolt 32 and the member 30, as shown in FIG. 7E, the stud bolt 32 is formed by forming a melting portion M in the lower end of the bolt 32 and the member 30. It is implanted perpendicularly to the surface of the member 30.
  However, the arc may cause a reduction in strength or deformation of the member 30. Moreover, when the member 30 is aluminized, a metal other than aluminum cannot be used for the stud bolt 32, resulting in insufficient bonding strength.
[0005]
  Incidentally, a friction coupling method (Japanese Patent Laid-Open No. 7-47480) has been proposed as a method of joining a member made of a different metal to an aluminum member. In this bonding method, the first component made of copper (Cu) is rotated and entered with respect to the second component made of aluminum (Al), and the frictional heat generated between the two components causes the two components to move. The vicinity of the interface is softened and bonded. However, there is no specific disclosure about how to use the first component.
[0006]
[Problems to be Solved by the Invention]
  The present invention solves the problems in the prior art described above.1It is an object of the present invention to provide a joining method in which another member can be easily screw-coupled to one or a pair of aluminum members using a simple jig or the like.
[0007]
[Means for Solving the Problems]
  In order to solve the above problems, the present invention provides a friction pin made of a different material from aluminum.AThe idea is to connect another member to the surface of the member made of ruminium by screw connection.
[0008]
  That is, the first joining method according to the present invention (Claim 1) includes at least a tip surface and a member made of aluminum or aluminum alloyIsFriction pin with a screw on the peripheral surface near the rear end on the opposite sideThe tip side ofWhile pressing from the surface of the member while rotating toward the inside, and softening and stirring the member by frictional heat generated between the member and the friction pin, the friction pin is implanted in the member, and Another member is fixed to the member using the screw of the friction pin protruding from the surface of the member.
[0009]
  According to this, the friction pin is fluidized and stirred in a solid state by friction heat from the friction pin, so that the friction pin can be easily and firmly implanted in the member and provided near the rear end of the friction pin. Another member can be easily fixed by using a screw. Moreover, even if the friction pin is made of a different material such as steel other than aluminum or stainless steel, it is not limited by the conventional stud welding, and the buried length of the friction pin can be deepened, so there are few jigs. Can be planted easily and firmly.
  The material of the other member includes materials other than aluminum.
[0010]
  The second joining method of the present invention (Claim 2) is a method of superposing a pair of aluminum or aluminum alloy members to form a polymerized surface, and from the surface of one member so as to penetrate the polymerized surface. To the other member, at least the tip surfaceIsFriction pin with a screw on the peripheral surface near the rear end on the opposite sideThe tip side ofWhile rotating and pressing, both members are softened and agitated by frictional heat generated between the pair of members and the friction pin, so that the friction pin is implanted in both members and the members are joined together. Another member is fixed to the two members by using the screw of the friction pin protruding from the surface of one member.
[0011]
  According to this, the friction pin penetrates the pair of aluminum members, and both the members are fluidized and stirred in a solid state and joined directly.TheAre firmly joined to each other. Moreover, the friction pin can be easily and firmly implanted in the member, and another member can be easily fixed using a screw provided near the rear end of the friction pin.
  still,SaidEven if both members are not directly joined or insufficiently joined, they can be firmly joined via the friction pin. Also,in frontThe material of the other member is not limited to aluminum.
[0012]
  In addition, the friction pin isThattipOn the faceJoining method in which scattered or linear irregularities are formed(Claim 3)Is also included.
  ThisIfFurther, it is possible to easily generate frictional heat between the friction pin and the member, and the aluminum of the member can be further fluidized in a solid state.
[0013]
  Furthermore, the said friction pin forms the unevenness | corrugation in the surrounding surface, The joining method(Claim 4)Is also included. According to this, it is easy to generate frictional heat between the friction pin and the member, and promotes fluidization of the aluminum of the member in a solid state,Second joining methodBoth members can be directly joined while ensuring the stirring of the aluminum straddling between the pair of members. Moreover, the friction pin itselfSecond joining methodA pair of members in orFirst joining methodIt is possible to firmly join with a single member.
[0014]
  Further, the joining method, wherein the friction pin is continuous with the peripheral surface or forms a partial screw(Claim 5)Is also included.
  According to this, the frictional heat is generated by a screw, the aluminum of the member is fluidized and stirred in a solid state, the direct joining of a pair of members and the pair of members of the friction pin itself, or a single member Can be further strengthened.
[0015]
  Furthermore, the joining method of pressing the friction pin against the pair of members or the single member while rotating in the direction opposite to the rotation direction of the screw formed on the peripheral surface thereof(Claim 6)Is also included.
  According to this, the aluminum of the member fluidized by the friction pin is prevented from being discharged outside the member along the screw, and the fluidized aluminum can be reliably stirred while applying an internal pressure. Accordingly, since the fluidized aluminum stays in the vicinity of the peripheral surface of the friction pin, the fluidized aluminum also enters the screw valley of the friction pin and solidifies to firmly fix the friction pin. Moreover, because the volume of fluidized aluminum increases,Second joining methodIt is possible to further strengthen the bonding of the pair of members.
[0016]
  Moreover, the said friction pin is a hollow material which has a hollow part opened in the front end surface, The joining method(Claim 7)Is also included.
  Further, in the vicinity of the overlapping surface between the pair of members through which the friction pin penetrates, at least one of the members is provided with a recess that forms a gap around the friction pin in advance.(Claim 8)Is also included.
  In addition, a joining method in which a through hole or a blocking hole having a small diameter and coaxial with the friction pin is formed in advance in the pair of members into which the friction pin enters or the single member.(Claim 9)Is also included.
[0017]
  According to these, a part of aluminum corresponding to the volume of the friction pin entering the member does not enter the hollow part, the concave part, the through hole or the blocking hole, and is not discharged to the outside. Later finishing can be facilitated. Moreover, while reducing the pressing force of the friction pin,Second joining methodIt is also possible to prevent the fluidized aluminum from flowing out from between the overlapping surfaces between the pair of members.
[0018]
  Further, when the friction pin is implanted in the pair of members or the single member, a large-diameter portion is formed on the friction pin located on the surface of these members, and the friction pin is paired with the pair of members or the single member. The rotation of the friction pin is stopped immediately before it is implanted in the member, and the friction pin is directed toward the tip surface and a load is applied along the axial direction so that part or all of the large diameter portion is Embedded in a single member or a single member(Claim 10)Is also included.
  According to this, since the friction pin is pressed in a state where the member is fluidized and solidified by the large-diameter portion and the aluminum is covered, the contact between the friction pin and the pair of members or the single member is also ensured.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
  In the following, preferred embodiments of the present invention will be described with reference to the drawings.
  FIG.In reference form which is the premise of the present inventionAs for Figure 1 (A),A pair of aluminum members 1a and 1b to be joined is superposed in the vicinity of their respective edges to provide a superposition surface G and restrained by a jig (not shown). The members 1a and 1b include pure Al (JIS: A1080, A1100), Al-Mn (JIS: A3003), Al-Mg (JIS: A5052, A5457), Al-Mg-Si (JIS: A plate material or extruded shape member made of aluminum, such as A6061), or a casting or die casting material made of casting aluminum or die casting aluminum is used. The thickness of each member 1a, 1b is about 3-18 mm, for example.
[0020]
  As shown in FIG. 1B, the friction pin 2 approaches the surface of one member 1b at a right angle so as to penetrate the overlapping surface G of both members 1a and 1b. The friction pin 2 is made of special steel that is harder than aluminum and has a higher softening point, and has a screw 4 that is uneven on its peripheral surface, and a thin portion 6 on its upper end. The thin portion 6 is gripped by a chuck fixed to one end of a rotating shaft such as a motor (not shown). The friction pin 2 has a diameter of about 3 to 10 mm and a length of about 4 to 34 mm. The friction pin 2 is applied with a pressing force (pressing force) of 1 to 20 kN along the axial direction while being rotated in the direction opposite to the rotation direction of the screw 4 at a rotational speed of 500 to 15000 rpm.
[0021]
  The friction pin 2 first enters one member 1b, generates frictional heat between the screw 4 and the aluminum of the member 1b, and agitates while softening and fluidizing the aluminum in the vicinity of the screw 4 in a solid state. To do. At this time, since the friction pin 2 is rotated in the opposite direction to the screw 4, the fluidized aluminum is pressed downward in the drawing.
  Further, when the friction pin 2 is pushed in, the tip side thereof penetrates the overlapping surface G and enters the other member 1a to generate frictional heat as described above, and the aluminum near the screw 4 is in a solid state. Stir while softening and fluidizing.
  As a result, as shown in FIG. 1 (C), the friction pin 2 passes through the overlapping surface G of both members 1a and 1b, and the aluminum of each member 1a and 1b is intervened between them in the horizontal and vertical directions. Fluidized and agitated to form a substantially bell-shaped joint W around the screw 4.
[0022]
  Then, in a state where the screw 4 portion of the friction pin 2 has entered the members 1a and 1b, the rotation of the friction pin 2 is stopped and the thin portion 6 is released from the chuck. Then, as shown in FIG. 1 (D), the joint W is solidified to join both members 1a and 1b. Further, the solidified joint W can fix the friction pin 2 across both the members 1a and 1b, and the thin-walled portion 6 can be implanted so as to protrude on the surface Wa of the joint W in one member 1b. . Therefore, both the members 1a and 1b are directly joined by the joint portion W and also joined via the friction pin 2, so that a strong joining strength can be obtained. In addition, on the surface Wa of the joint portion W, a part of the volume is discharged as the friction pin 2 enters and a burr Wc is formed, but this burr Wc is removed later if necessary. Further, a part of the fluidized aluminum along the overlapping surface G tends to flow out to the outside due to internal pressure due to the reverse rotation of the screw 4 of the friction pin 2. As a result, the burr Wb as shown in FIG. 1D may be formed.
[0023]
  FIG.Among the reference forms,The present invention relates to a form for preventing the generation of the burr Wb.
  FIG. 2A shows a state in which a pair of disk-shaped recesses 1c are formed coaxially in the vicinity of the center of the overlapping surface G of both members 1a and 1b to be joined. As shown in FIG. 2 (B), the friction pin 2 is pushed in from the one member 1b toward the concave portions 1c of the overlapping surface G in the same manner as described above. As a result, as shown in FIG. 2C, the aluminum of both members 1 a and 1 b fluidized and stirred by the screw 4 of the friction pin 2 forms a joint W around the friction pin 2. At that time, the aluminum having a volume corresponding to the pair of recesses 1c is not subjected to the internal pressure due to the reverse rotation of the screw 4 of the friction pin 2 and flows out to the outside, thereby forming the joint W with little or no burr Wb, Wc. can do.
  In FIG. 2C, the fluidized aluminum of the members 1a and 1b may not be stirred together. However, even in this case, each member 1a, 1b is joined with the intensity | strength more than required through the separate junction part W and the friction pin 2. FIG. The recess 1c may be formed only in one of the members 1a and 1b.
[0024]
  FIG. 2D shows a through hole 1d having a diameter smaller than that of the pin 2 along the approach path of the friction pin 2 in one member 1a, and along the approach path of the pin 2 in the other member 1b. Thus, a state in which a blocking hole 1e having a diameter smaller than that of the pin 2 is formed is shown. The diameter of the blocking hole 1e is the same as or slightly smaller than the through hole 1d. By forming the through hole 1d and the blocking hole 1e in advance in the vicinity of the overlapping surface G of both the members 1a and 1b, generation of the burrs Wb and Wc due to aluminum fluidized by the friction pin 2 can be prevented or reduced. . In addition, the pushing force along the axial direction of the friction pin 2 can be reduced. Only one of the through hole 1d and the blocking hole 1e may be formed.
[0025]
  Further, as shown in FIG. 2 (E), the burr Wb made of aluminum fluidized by the friction pin 2 can also be formed by forming the friction pin 2 itself from a hollow material having a hollow portion 3 opened at the tip end surface thereof. , Wc can be reduced, and the pushing force along the axial direction of the friction pin 2 can be reduced.
  It should be noted that the burrs Wb, Wc of the joint portion W can be obtained by using the concave portion 1c and the through hole 1d, the concave portion 1c, the through hole 1d and the closing hole 1e, or the friction pin 2 having the hollow portion 3 as appropriate in combination. It is possible to prevent the occurrence of this more reliably.
[0026]
  Figure 3The second joining method in the present inventionAbout.
  Figure 3 (a),The friction pin 2 is shown, and as shown in FIG. 3A, it is pushed into the pair of aluminum members 1a and 1b while rotating in the same manner as described above to form a joint W around the screw 4. . In addition, the pin 2 is implanted so that the screw 4 near the rear end of the friction pin 2 protrudes upward from the surface Wa of the joint W and the one member 1b. Then, a pair of members 1a, in which the angle 8 is joined in advance by passing through the through-hole 9 of the angle 8 as another member through the screw 4 of the protruding friction pin 2 and screwing the nut N into the screw 4 are provided. It is fixed to 1b.
[0027]
  Thereby, both the aluminum members 1 a and 1 b and the angle 8 can be firmly joined via the friction pin 2. The angle 8 is made of extruded shape steel or aluminum. Also in FIG. 3 and the subsequent drawings, the burrs Wb and Wc are formed on the surface of the member 1a and the overlapping surfaces of the members 1a and 1b by forming the recesses 1c and the through holes 1d in the members 1a and 1b. It has a structure that suppresses the occurrence of Although the generation of burrs Wc and the like cannot be completely prevented, the illustration thereof is omitted.
[0028]
  Figure 3 (b),A friction pin 2 'having a screw 4 on the peripheral surface and a hexagonal hole 7 formed on the rear end surface thereof is shown. Figure 3 (B),A state in which the pair of members 1a and 1b and the angle 8 are joined using the pin 2 'is shown. That is, the friction pin 2 'is previously inserted into the hexagonal hole 7 and a hexagonal pin integral with the chuck (not shown) is inserted and fixed to the chuck having an electromagnet around it. Next, the friction pin 2 ′ is pushed into the pair of aluminum members 1 a and 1 b while rotating in the same manner as described above, and a joint W is formed around the screw 4. At the same time, the pin 2 'is implanted so that the screw 4 near the rear end of the friction pin 2' protrudes upward from the surface Wa of the joint W and the one member 1b.
  Further, a pair of members 1a in which the angle 8 is joined in advance by passing through the through-hole 9 of the angle 8 which is a separate member through the screw 4 of the protruding friction pin 2 'and screwing the nut N into the screw 4. , 1b. Thereby, both the aluminum members 1a and 1b and the angle 8 can be firmly joined via the friction pin 2 '.
[0029]
  Figure 3 (c),A friction pin 2 ″ having a screw 4 on the peripheral surface near the front end and a reverse screw 4 ′ on the peripheral surface near the rear end and a hexagonal thick grip portion (large diameter portion) 5 formed therebetween is shown. 3 (C),A state in which the pair of members 1a and 1b and the angle 8 are joined using the pin 2 ″ is shown. That is, the friction pin 2 ″ is fixed to a chuck (not shown) by the grip portion 5 in advance. Next, the friction pin 2 ″ is pushed into the pair of members 1a and 1b while being rotated in the same manner as described above to form a joint W around the screw 4 and at the same time the gripping portion 5 of the friction pin 2 ″ and the rear portion The pin 2 ″ is implanted by causing the reverse screw 4 ′ near the end to protrude upward from the surface Wa of the joint W and the one member 1 b.
[0030]
  Furthermore, a pair of angle 8 is pre-joined by passing through a through-hole 9 of angle 8 as another member through reverse screw 4 ′ of protruding friction pin 2 ″ and screwing nut N into screw 4. This is fixed to the members 1a and 1b.Also, both the aluminum members 1a and 1b and the angle 8 can be firmly joined via the friction pin 2 ″.
  Moreover, you may embed in the junction part W in one member 1b so that all or one part of the said holding | grip part 5 may be described below.
  Further, in place of the above angle 8, another different member, for example, a structural strength member such as channel shape steel, H shape steel, or I shape steel, or a plate material of a different material from aluminum such as a steel plate or a stainless steel plate is rubbed. It is also possible to fix and join by utilizing the screw 4 protruding from the pins 2, 2 ', 2 "and the reverse screw 4'.
[0031]
  Figure 4The reference formIt relates to a modified form.
  4 (A) and 4 (B) show a peripheral surface having a screw 4, a large-diameter portion 5a having a cylindrical shape at the rear end thereof, and a friction pin 2a having a hexagonal hole 7 at the rear end surface of the large-diameter portion 5a. Show.
  Figure 4 (C),The state which joins a pair of member 1a, 1b using the said pin 2a is shown. The friction pin 2a is previously fixed to a chuck (not shown) having a hexagonal pin inserted into the hexagonal hole 7 and an electromagnet that attracts the large diameter portion 5a integrally with the hexagonal pin. Next, the friction pin 2 a is pushed into the pair of members 1 a and 1 b while rotating so as to penetrate the overlapping surface G as described above, and a joint W is formed around the screw 4.
[0032]
  Then, the rotation of the friction pin 2a is stopped immediately before the friction pin 2a is implanted in the pair of members 1a and 1b, and a further load is applied to the front end surface along the axial direction via the chuck. As a result, as shown in FIG. 4D, the entire large-diameter portion 5a of the friction pin 2a can be embedded in the joint W in the one member 1b. Accordingly, since the joint portion W is solidified while being pressed by the large-diameter portion 5a of the friction pin 2a, the joint portion W is firmly adhered to the members 1a and 1b and the screw 4 of the pin 2a, and the joint between these three members is further increased. Can be strong. The same effect can be obtained even if a part of the large-diameter portion 5a is embedded in the joint portion W in the member 1b.
[0033]
  FIG.,In addition, different types of friction pins were used.Second joining methodAbout.
  FIG. 5A shows a friction pin 2b having a screw 4 ″ partially on the peripheral surface near the tip along the longitudinal direction, a screw 4 on the peripheral surface near the rear end, and a hexagonal hole 7 on the rear end surface. The pin 2b is fixed to the chuck in the same manner as described above, and as shown in Fig. 5 (B), the pair of members 1a and 1b are pushed while rotating so as to penetrate the overlapping surface G as described above. A joint W is formed around a partially formed screw 4 ″ near the tip. At this time, the frictional heat with the members 1a and 1b is increased by the partial screw 4 ″, and the fluidized aluminum can be further stirred vigorously with the polymerization surface G interposed therebetween.
[0034]
  Accordingly, as shown in FIG. 5C, a relatively large joint W is formed around the screw 4 ″ even when the tip of the friction pin 2b passes through the overlapping surface G. The pin 2b. , And planting over both members 1a and 1b, and using the screw 4 near the rear end protruding from the surface of one member 1b, the angle 8 as another member is Can be fixed and firmly joined to both members 1a and 1b.
[0035]
  FIG. 5 (D) shows a form in which the concavo-convex portions 3a having a dotted shape are provided on the tip surfaces of the friction pins 2-2b described above. Further, as shown in FIG. 5 (F), a linear concavo-convex portion 3b composed of parallel lines orthogonal to each other can be provided on the tip surfaces of the friction pins 2-2b. By providing these uneven portions 3a and 3b on the front end surfaces of the friction pins 2 to 2b, it is possible to easily generate friction heat between the pins 2 to 2b and the members 1a and 1b and to further fluidize aluminum. Can be promoted.
[0036]
  FIG. 6 (A)Thru ( C )IsFirst joining method in the present inventionIndicates.
  In advance,The aluminum member 1b is horizontally restrained, and the friction pin 2 'having the screw 4 on the peripheral surface and the hexagonal hole 7 on the rear end surface is fixed to the chuck (not shown) via the hexagonal hole 7.
  Next, as shown in FIG. 6 (A), the friction pin 2 'is rotated toward the member 1b while rotating together with the chuck. At this time, the rotation direction is opposite to the rotation direction of the screw 4 of the friction pin 2 ′. Then, as shown in FIG. 6B, the screw 4 near the tip of the friction pin 2 'generates frictional heat with the member 1b, and the aluminum of the member 1b is softened and fluidized and stirred as described above. A junction W is formed.
[0037]
  Further, the rotation and pressing of the friction pin 2 'are stopped in a state where the friction pin 2' has entered the member 1b for a certain length. Then, the aluminum of the joint W is solidified and the screw 4 portion near the tip of the friction pin 2 'is embedded in the member 1b. Further, when the chuck is removed from the friction pin 2 ′, the screw 4 near the rear end protrudes from the surface of the member 1b as shown in FIG. 6B.
  Then, as shown in FIG. 6 (C), an angle that penetrates the angle 8 and is screwed into the screw N of the friction pin 2c protruding from the surface of the member 1b and is a member different from the member 1b. 8 can be firmly joined to each other through the friction pin 2 '.
  It is obvious that the friction pins 2, 2 ″ and 2b can be used in place of the friction pin 2 ′.
[0038]
  6 (D) and 6 (E) show a mounting bracket 10 for an anti-vibration rubber bush., FirstAn example in which the joining method is applied is shown. The bracket 10 integrally has a ring portion 12 into which the bush is fitted and flanges 14 and 16 extending from the lower side to the left and right. A notch 17 is formed on the bottom surface of the right flange 16 in the drawing. Yes. In addition, the bracket 10 cuts an extruded shape made of aluminum (not shown) having a cross-sectional shape integrally including the ring portion 12, the flanges 14, 16 and the notch 17 with a required width perpendicular to the extrusion direction. Is obtained.
[0039]
  As shown in FIG. 6E, the bottom surface of the left flange 14 of the bracket 10 is shown in FIGS. 6A to 6C.FirstBolts made of friction pins 2 'are vertically planted by the joining method. Using this bolt (friction pin) 2 ', the bracket 10 can be screwed to a component such as a vehicle body (not shown).
  As shown in FIG. 6D, an aluminum plate 18 orthogonal to the flange 16 is inserted into the notch 17 of the right flange 16 of the bracket 10. As shown in FIG. 6 (E), the overlap portion of the flange 16 and the plate 18 is shown in FIG.Reference formIn this joining method, a pair of the joining portions W are formed and the friction pins 2a are respectively entered. Thereby, the plate 18 is firmly joined to the bracket 10. Note that attachment holes 19 are formed at both ends of the plate 18, and are thereby screwed to components such as a vehicle body.
[0040]
  The present invention is not limited to the embodiments described above.
  For example, the concave portion 1c, the through hole 1d, and the blocking hole 1e are provided near the overlapping surface G between the pair of members 1a and 1b in FIGS. 3 to 5 or the friction in FIGS. The hollow portion 3 shown in FIG. 2 (E) may be formed in the pins 2, 2 ', 2 ", 2a, 2b.
  Further, when the pair of members 1a and 1b is formed of an aluminum extruded shape, the concave portion 1c can be integrally formed in the vicinity of the overlapping portion later.
[0041]
  Further, the unevenness formed on the peripheral surface of the friction pin is not limited to the screw 4 or the partial screw 4 ″, but is a continuous ring-shaped unevenness or a discontinuous ring shape parallel to each other along the radial direction of the peripheral surface. Or a ridge or protrusion that protrudes at a plurality of locations in the circumferential direction of the circumferential surface and is continuously formed along the axial direction.
  It should be noted that the aluminum of the pair of members 1a and 1b is not limited to the same or the same type, and it is obvious that different types of aluminum can be used.
[0042]
【The invention's effect】
  The first described aboveContactMethod(Claim 1)According to, MaBy fluidizing and stirring an aluminum member in a solid phase with frictional heat generated by the rubbing pin, the friction pin can be easily and firmly implanted in the member, and a screw provided near the rear end of the friction pin is used. And another member can be easily fixed. Moreover, even if the friction pin is made of a different material such as steel other than aluminum or stainless steel, it is not limited by conventional stud welding, and the buried length of the friction pin can be deepened, so there are few jigs. Can be planted easily and firmly.
[0043]
  In addition2Joining method of the invention(Claim 2)According to the above, the friction pin penetrates the pair of aluminum members, both members are fluidized in a solid state, and are agitated and joined together, and both members are also firmly joined via the friction pins. Moreover, the friction pin can be easily and firmly implanted in the member, and another member can be easily fixed using a screw provided near the rear end of the friction pin.
  Claims3Thru5According to the joining method described in (3), it is possible to easily generate frictional heat by the friction pin with respect to the pair of members or the single member, and it is possible to reliably stir the fluidized aluminum of the member.
  Further claims6According to the joining method described in the above, it is possible to prevent the fluidized aluminum in the member into which the friction pin enters from being inadvertently discharged out of the member.
  In addition, the claims7Thru9According to the joining method described in the above, it is possible to prevent the fluidized aluminum in the member into which the friction pin enters from flowing out as a burr between the pair of members or from being inadvertently discharged to the surface of a single member. Can be reduced.
[Brief description of the drawings]
FIG. 1 (A) to (D)Preliminary reference formSchematic which shows each process of this joining method.
FIG. 2 (A) to (C)Reference form aboveSchematic which shows the different form in the joining method of (D), (D) is the schematic which shows a further different form, (E) is sectional drawing which shows the friction pin of a different form.
FIGS. 3A to 3C are schematic views showing different types of friction pins, and FIGS. 3A to 3C use these friction pins.Second in the present inventionSchematic which shows a joining method.
FIGS. 4A and 4B are front views or cross-sectional views showing different types of friction pins, and FIGS. 4C and 4D use the friction pins.Different reference formsFIG.
5A is a front view showing another type of friction pin, and FIGS. 5B and 5C use the friction pin. FIG.Second in the present inventionSchematic which shows a joining method, (D) and (E) are the partial front views or bottom views which show the uneven | corrugated | grooved part in the front end surface of a friction pin.
[Fig. 6] (A)-(C)First in the present inventionSchematic showing each step of the joining method, (D) and (E)the aboveThe perspective view or front view of the mount bracket formed by the joining method.
7A is a schematic view showing a joining state by arc welding according to the prior art, FIGS. 7B and 7C are partial cross-sectional views showing respective steps of conventional spot welding, and FIGS. 7D and 7E. FIG. 3 is a schematic view showing each process of conventional stud welding.
[Explanation of symbols]
  1a, 1b ………………………… Members
  1c …………………………………… Recess
  1d ………………………………… Through hole
  1e …………………………………… Occlusion hole
  2, 2 ', 2 ", 2a, 2b ... Friction pin
  3 …………………………………… Hollow
  3a, 3b ………………………… Uneven portion
  4,4 ′, 4 ″ …………………… Screw (Uneven)
  5 …………………………………… The gripping part (large diameter part)
  8 …………………………………… Angle (another member)
  G …………………………………… Polymerized surface

Claims (10)

To aluminum or aluminum alloy member, the front-end surface side of the friction pin provided with a screw on the peripheral surface of the rear end of the opposite side presses while rotating toward the inside from the surface of the member and at least the tip surface ,
By softening and stirring the member by frictional heat generated between the member and the friction pin, the friction pin is implanted in the member,
Fixing another member to the member using the screw of the friction pin protruding from the surface of the member;
The joining method characterized by the above-mentioned. Overlapping a pair of aluminum or aluminum alloy members to form a polymerized surface,
Towards the surface of one member so as to penetrate the polymer surface on the other member, while rotating the front-end surface side of the friction pin provided with a screw on the peripheral surface of the rear end opposite to the at least the tip surface Press and
While softening and stirring both members by frictional heat generated between the pair of members and the friction pins, the friction pins are implanted in both members and the members are joined together.
Fixing another member to both members using the screw of the friction pin protruding from the surface of the one member;
The joining method characterized by the above-mentioned. The friction pin has a dotted or linear uneven portion on its tip surface ,
The joining method according to claim 1 or 2 , wherein The friction pin has irregularities on its peripheral surface,
The joining method according to any one of claims 1 to 3 . The friction pin is continuous or partly threaded on its peripheral surface;
The bonding method according to any one of claims 1 to 4, characterized in that. Pressing the pair of members or the single member while rotating the friction pin in the direction opposite to the rotation direction of the screw formed on the peripheral surface thereof;
The joining method according to claim 5 . The friction pin is a hollow material having a hollow portion that opens to the tip surface thereof.
The bonding method according to any one of claims 1 to 6, characterized in that. In the vicinity of the overlapping surface between the pair of members through which the friction pin penetrates, at least any member was previously provided with a recess that forms a gap around the friction pin.
The joining method according to any one of claims 2 to 7 , wherein: In the pair of members or the sole member to which the friction pin enters were preformed and diameter of the through-holes or closed hole closure friction pin coaxial,
The bonding method according to any one of claims 1 to 8, characterized in that. When the friction pin is implanted in the pair of members or the single member, a large-diameter portion is formed on the friction pin located on the surface of these members,
By stopping the rotation of the friction pin immediately before the friction pin is implanted in a pair of members or a single member, and applying the load along the axial direction with the friction pin directed toward the tip surface, A part or all of the diameter portion was embedded in one member or a single member,
The joining method according to any one of claims 1 to 9 , wherein:

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