JP5771974B2 - Joining method - Google Patents

Description

The present invention relates to a bonding side method using resistance heating and vibrating friction.

  Conventionally, resistance welding has been used as a method for joining conductive metal materials to each other. Resistance welding is a method in which conductive metal materials are melt-bonded by resistance heating caused by contact resistance of the joint surface by sandwiching the conductive metal materials in contact with each other and applying current from the electrodes. . For example, Patent Document 1 describes a method in which a pair of conductive metal materials to be bonded are vibrated in contact with each other, the vibration is stopped after the surface insulating coating is peeled off, and fusion bonding is performed by resistance heating. Yes.

JP 11-138275 A

  However, the current that causes resistance heating is concentrated on the high surface pressure portion at the joint surface between the members to be joined and does not flow evenly over the entire contact surface, resulting in uneven heating and joining only a limited area and shape. . For example, when the joining surfaces of the members to be joined are not on the same plane, there is a problem that it is difficult to uniformly join all the joining surfaces and obtain a stable joining strength. In particular, in the case of a split surface for forming a hollow passage and extending along the axis of the hollow passage, the split surface is often not on the same plane, and such a split surface is set as a joint surface to be uniform. There is a demand for the establishment of technology that enables bonding.

The present invention has been made in order to solve the above-described problem, and as a joining surface that is not on the same plane, a split surface for forming a hollow passage and extending along the axis of the hollow passage is provided. and an object thereof is also to provide a stable bonding how capable of obtaining a joining strength at the time set.

The joining method according to the present invention that achieves the above object is a joining method for joining a pair of members to be joined that are made of a conductive material and have a joining surface that is not on the same plane. In the bonding method, the bonding surfaces of the members to be bonded are opposed to each other, and a pair of the members to be bonded are relatively slid, and current is passed from one of the members to be bonded to the other to perform resistance heating. By doing, it has the joining process which joins the said joint surfaces. And as a joint surface which is not on the same plane, a split surface for forming a hollow passage and extending along the axis of the hollow passage is set. Further, in the joining method, the sliding is generated by vibration in one direction, and intersects the joining region of the pair of members to be joined with respect to the direction in which the split surface extends along the axis of the hollow passage. The vibration in the one direction is applied to the direction of movement .

  According to the joining method configured as described above, since resistance welding is performed while sliding the members to be joined, sliding acts on the high surface pressure portion heated by resistance heating, and wear and plastic flow occur. As the surface pressure of the high surface pressure portion decreases, the current concentration location changes from moment to moment. As a result, the bonding surface can be heated uniformly, the entire bonding surface can be bonded uniformly, and stable bonding strength can be obtained even on a plurality of bonding surfaces that are not on the same plane. Therefore, it is possible to obtain stable joint strength even when a split surface for forming a hollow passage and a split surface extending along the axis of the hollow passage is set as a joint surface that is not on the same plane. .

It is the schematic for demonstrating the joining apparatus applied to the joining method which concerns on embodiment. It is a schematic block diagram which shows the cylinder head joined by applying the joining method which concerns on embodiment. It is sectional drawing which follows the 3-3 line of FIG. It is a flowchart for demonstrating the joining method which concerns on embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The dimensional ratios in the drawings are exaggerated for convenience of explanation, and are different from the actual ratios.

  FIG. 1 is a schematic diagram for explaining a joining apparatus applied to the joining method according to the embodiment.

  The joining device 40 according to the embodiment is a joining device for joining a pair of members to be joined 10 and 20 having conductivity. In summary, the joining device 40 is configured so that the joining surfaces 10a and 20a of the joined members 10 and 20 to be joined to each other face each other and the pair of joined members 10 and 20 slide relative to each other while the joined members 10 and 20 are relatively slid. , 20 from one to the other through the first and second electrodes 42, 44 to have resistance heating, thereby joining the joining surfaces 10a, 20a. The joining means using resistance heating and frictional heat (plastic flow) includes a pressure device 80 that relatively presses the members to be joined 10 and 20 and a sliding device that slides the members to be joined 10 and 20 relatively. 70, a current supply device 50 for flowing current from one of the members to be joined 10 and 20 to the other through the electrodes 42 and 44, and a control device 90. The control device 90 controls the operations of the pressurizing device 80, the sliding device 70, and the current supply device 50.

  The workpieces to be joined include a member to be joined 10 positioned above, a member to be joined 20 located below, and an intermediate member 30 that is a member to be joined disposed between the members to be joined 10 and 20. The joining region of the members to be joined 10 and 20 and the intermediate member 30, that is, the joining surface has a shape that allows vibration in one direction, which will be described later, and the extending direction of the joining surfaces 10a and 20a is the horizontal direction H. The members 10 and 20 can be easily joined by vibration.

  In the present embodiment, the members to be joined 10 and 20 are high-pressure die casting (HPDC) castings, and an aluminum casting material (ADC12) is applied.

  Note that the members to be joined 10 and 20 are not particularly limited to high-pressure die casting (HPDC) castings, and for example, rolled materials can be applied. However, since the joint according to Embodiment 1 is formed at a melting point or lower and the influence of the inclusion gas is suppressed, the degree of freedom in selecting a casting material is large (the material selection range is wide). Moreover, since the aluminum high pressure die casting is an inexpensive structural material, the manufacturing cost of the joined body can be reduced.

  The members to be joined 10 and 20 are not limited to the form made of the same material (the same kind of metal). For example, one of the members to be joined 10 and 20 can be made of aluminum, and the other of the members to be joined 10 and 20 can be made of an iron-based material or a magnesium-based material. In this case, since an Al—Fe or Al—Mg dissimilar material joined body is obtained, it can be easily applied to automotive parts.

  The intermediate member 30 is made of a eutectic reaction material that undergoes a eutectic reaction with the bonded members 10 and 20. When the bonded members 10 and 20 are aluminum, eutectic reaction materials that form a low temperature eutectic with aluminum are zinc (Zn), silicon (Si), copper (Cu), tin (Sn), silver (Ag), Nickel (Ni) or the like can be applied.

  The eutectic reaction material forms a liquid phase and promotes interdiffusion between the members to be bonded 10 and 20 and between the eutectic reaction material and the members to be bonded 10 and 20, thereby ensuring good bonding strength. In addition, since the gap is filled with the liquid phase to be formed, it is easy to achieve good water-tightness even when joining large areas or curved surfaces. Therefore, it is particularly effective for a portion requiring high water tightness, a two-dimensional curved surface, or a large area portion. The thickness of the eutectic reaction material is, for example, 10 to 100 μm, but is not particularly limited thereto, and the thickness can be appropriately changed according to the site.

  Due to the eutectic reaction of the intermediate member 30 to form a liquid layer with a low melting point and to block oxygen and suppress reoxidation. It is also preferable in that it can be joined with time and low heat input, and mass production is easy.

  The intermediate member 30 can also be composed of a conductive material that forms a liquid phase other than the eutectic reaction material. In this case, the degree of freedom of selection of the intermediate member is large (the material selection range is wide), and a liquid phase is formed by the intermediate member 30, so that the members to be bonded 10, 20 and the intermediate member 30 and the member to be bonded 10 are formed. , 20 is promoted, and good bonding strength is ensured. And since a gap | interval is filled up with the liquid phase formed, it is easy to achieve favorable watertightness also in joining of a large area and a curved surface. Examples of the conductive material that forms a liquid phase other than the eutectic reaction material include inexpensive and general brazing materials and low-temperature solder as compared with the eutectic reaction material.

  The intermediate member 30 is not limited to the form which consists of another body, but can also be comprised from the coating layer integrated with one of the to-be-joined members 10 and 20. FIG. In this case, it is possible to arrange the intermediate member 30 locally. The coating can be formed by plating, cladding material, coating, or the like. Moreover, the intermediate member 30 does not necessarily need to be provided.

  The first and second electrodes 42 and 44 raise the temperature of the members to be bonded 10 and 20 and the intermediate member 30 (bonding surfaces 10a and 20a of the members 10 and 20 to which the intermediate member 30 is interposed) by resistance heating. It is a heating means for softening, and the first electrode 42 is electrically connected to the member to be bonded 10 positioned above, and the second electrode 44 is electrically connected to the member to be bonded 20 positioned below. The The 1st and 2nd electrodes 42 and 44 are not limited to the form which contacts the to-be-joined members 10 and 20 directly, For example, it is also possible to contact indirectly through the other member which has electroconductivity. Each of the first and second electrodes 42 and 44 may be composed of a plurality of electrodes.

  The current supply device 50 is current supply means for causing a direct current or an alternating current to flow from the first electrode 42 to the second electrode 44 via the bonded member 10, the intermediate member 30, and the bonded member 20. For example, the current value and the voltage value are configured to be adjustable.

  The holding device 60 has a movable holding part 62 positioned above and a fixed holding part 64 positioned below. The movable holding part 62 is used to hold the member 10 to be reciprocated in the horizontal direction H. The fixed holding portion 64 is used to restrict the movement of the member to be bonded 20 in the horizontal direction H and maintain the member to be bonded 20 in a stationary state relative to the member to be bonded 10.

  The sliding device 70 slides the member to be bonded 10 relative to the member to be bonded 20, and generates frictional heat (plasticity) on the bonding surfaces 10a and 20a of the members to be bonded 10 and 20 on which the intermediate member 30 is interposed. (Vibrating) used to generate a flow). The vibration means vibrates (vibrates) the member to be bonded 10 held by the movable holding portion 62 in a horizontal direction H parallel to the extending direction of the bonding surfaces 10a and 20a. And a motor 74 which is a drive source. The vibration means can arbitrarily control the vibration frequency, the vibration amplitude, the vibration force, and the like. For example, the excitation amplitude is adjustable in the range of 100 to 1000 μm, and the excitation frequency is adjustable in the range of 10 to 100 Hz. The vibration mechanism is not particularly limited, and for example, ultrasonic vibration, electromagnetic vibration, hydraulic vibration, and cam vibration can be applied.

  Since the excitation direction is a reciprocating motion in one direction along the extending direction of the joint surfaces 10a and 20a, the degree of freedom of the shape of the joint surfaces 10a and 20a is improved. That is, since vibration can be applied as long as it can be displaced in only one direction, the shape of the joint surfaces 10a and 20a does not need to be a flat surface. For example, the convex portion may be fitted in a groove extending in one direction. Is possible.

  The pressurizing device 80 includes a pressurizing unit 82 positioned above and a support structure 84 positioned below. The pressurizing part 82 is connected to the first electrode 42 and can move forward and backward in the vertical direction (pressing direction orthogonal to the joint surfaces 10a and 20a) L. The pressurizing unit 82 is capable of applying a pressure P1 to the member to be bonded 10 via the first electrode 42, and is a surface pressure adjusting means for adjusting the pressing surface pressure of the member 10 to be bonded to the member 20 to be bonded. . The pressurizing unit 82 includes, for example, a hydraulic cylinder, and is configured to be able to adjust the applied pressure. The applied pressure is, for example, 2 to 10 MPa. The support structure 84 is used to support the second electrode 44 to which the pressing force of the pressurizing device 80 is transmitted through the member to be bonded 10, the intermediate member 30, and the member to be bonded 20.

  It is also possible to apply a form in which the pressure applied by the pressurizing unit 82 is directly applied to the bonded member 10 without using the first electrode 42. It is also possible to dispose the pressurizing unit 82 and the support structure 84 in reverse. In this case, the second electrode 44 is pressed by the pressurizing portion 82 disposed below, and the first electrode 42 is supported by the support structure 84 disposed above. In addition, the degree of freedom in adjusting the surface pressure can be improved by providing the second pressure unit instead of the support structure 84.

  The control device 90 is a control means including a computer having a calculation unit, a storage unit, an input unit, and an output unit, and is used for comprehensively controlling the pressurizing device 80, the sliding device 70, and the current supply device 50. Is done. Each function of the control device 90 is exhibited when the arithmetic unit executes a program stored in the storage device.

  For example, the program causes the member to be joined 10 in which the intermediate member 30 is interposed by vibrating the member to be joined 10 in the horizontal direction H by the sliding device 70 in a state where the pressure P1 of the pressurizing device 80 is adjusted. The current supplied from the current supply device 50 is slid from the first electrode 42 through the joined member 10, the intermediate member 30 and the joined member 20 while sliding the joining surfaces 10a, 20a of the This is for causing the control device 90 to execute a procedure for joining the members to be joined 10 and 20 with the intermediate member 30 interposed by flowing to the two electrodes 44 and resistance heating.

  FIG. 2 is a schematic configuration diagram showing the cylinder head 100 joined by applying the joining method according to the embodiment, and FIG. 3 is a sectional view taken along line 3-3 in FIG.

  Referring to FIG. 2, the cylinder head 100 is divided into a cam carrier 101, an upper deck 102, a water jacket upper 103, a water jacket lower 104, and a lower deck 105 in order from the upper side, and these are joined to each other. . The cam carrier 101 rotatably supports a camshaft that opens and closes an intake valve and an exhaust valve. The water jacket upper 103 and the water jacket lower 104 form a water jacket space. The upper deck 102 closes the water jacket space from above. The lower deck 105 is in contact with the upper surface of a cylinder block (not shown) to form a combustion chamber.

  A joint surface P1 indicated by a one-dot chain line indicates a joint surface between the cam carrier 101 and the upper deck 102, and a joint surface P2 indicates a joint surface between the upper deck 102 and the water jacket upper 103. A joint surface P3 indicates a joint surface between the water jacket upper 103 and the water jacket lower 104, and a joint surface P4 indicates a joint surface between the water jacket lower 104 and the lower deck 105.

  In particular, the joint surface P3 between the water jacket upper 103 and the water jacket lower 104 is a joint surface that is not on the same plane. A split surface for forming the hollow passage and extending along the axis of the hollow passage is set as the joint surface that is not on the same plane. The hollow passage includes an intake port 110 and an exhaust port 111. The water jacket upper 103 corresponds to the bonded member 10, and the water jacket lower 104 corresponds to the bonded member 20. The vibration direction is a direction orthogonal to the paper surface in FIG. 2, and a horizontal direction H on the left and right in FIG.

  Referring to FIG. 3, the split surface 120 is a portion 121 where the dimension in the direction in which the split surface 120 extends (left and right direction in the drawing) is maximized when viewed in a cross section orthogonal to the axis 112 of the hollow passages 110 and 111. (Shown with a black circle in the figure). In the illustrated example, the hollow passage 111 has a circular cross section, and the horizontal split surface 120 passes through a diameter portion of the hollow passage 111. By comprising in this way, a vibration can be transmitted to the to-be-joined members 10 and 20 equally. In addition, the code | symbol 130 of FIG. 3 has shown the water jacket space.

  Next, the joining method according to the embodiment will be described.

  FIG. 4 is a flowchart for explaining the joining method according to the embodiment. The algorithm shown by the flowchart shown in FIG. 4 is stored as a program in the storage unit of the control device 90, and is executed by the arithmetic unit of the control device 90. A method of joining the members to be joined 10 and 20 using the joining device 40 will be described with reference to the flowchart shown in FIG.

  First, as shown in FIG. 1, the intermediate member 30 is sandwiched between the members to be bonded 10 and 20 to be bonded to each other, and the members to be bonded 10 and 20 are held between the electrodes 42 and 44. The member to be bonded 20 is fixed to the fixed holding portion 64, and the member to be bonded 10 is held by the movable holding portion 62 so as to vibrate.

  Subsequently, the members to be joined 10 and 20 are pressurized with a pressurizing force set in advance by the pressurizing device 80. The pressure applied by the pressurizing device 80 is adjusted by the control device 90 and is preferably about 2 to 10 MPa, for example, but is not limited thereto.

  Next, the sliding device 70 is driven by the control device 90 to vibrate and slide the member 10 to be joined in a direction along the joining surfaces 10a and 20a (preliminary sliding step S11). Although the excitation frequency and the excitation amplitude are not particularly limited, as an example, the excitation amplitude is preferably about 100 to 1000 μm, and the excitation frequency is preferably about 10 to 100 Hz.

  When the pre-sliding step S11 for sliding while applying pressure as described above is performed, the joint surfaces 10a and 20a slide and frictional heat is generated, the material is softened, and the joint surfaces 10a and 20a are worn. It plastically flows and the surface pressure between the joint surfaces 10a and 20a is made uniform to some extent. Further, the preliminary sliding step S11 has the effect of reducing the variation in contact resistance due to the difference in the film thickness by removing the oxide film on the surface of the aluminum, and suppressing the variation in the amount of heat generated when resistance heating is performed in the subsequent step. Demonstrate. Therefore, before bonding, the surface of the members to be bonded 10 and 20 made of aluminum is degreased, and further, a treatment such as brushing with a wire brush to remove the oxide film on the surface becomes unnecessary, and workability is improved. Of course, a treatment such as brushing may be performed before the preliminary sliding step S11.

  After the preliminary sliding step S11, a first joining step S12 is performed. In the first joining step S <b> 12, the first electrode 42 and the second electrode 44 are brought into contact with the members to be joined 10, 20, and the sliding between the first electrode 42 and the second electrode 44 is maintained while maintaining sliding. A current is supplied by the current supply device 50. In this manner, the members to be joined 10 and 20 are heated by using both friction heating and resistance heating in combination. In the first bonding step S12, resistance heating acts on the high surface pressure portion where currents in the bonding surfaces 10a and 20a concentrate, and the oxide films on the bonding surfaces 10a and 20a are forcibly separated. Furthermore, pressure and sliding are applied to the high surface pressure portion heated by resistance heating to cause plastic flow and material diffusion, and the high surface pressure portion is worn and the current concentration portion changes every moment. As a result, the current flow is dispersed and the joint surfaces 10a and 20a are heated uniformly.

  After the first joining step S12, a second joining step S13 is performed. In the second joining step S <b> 13, the frictional heat is increased by decreasing the supply of current by the current supply device 50 while increasing the pressurizing force by the pressurizing device 80. As a result, the amount of heat generated by resistance heating is reduced, and the process proceeds to a process of promoting integration by stirring the softened material by sliding. Note that the supply of current by the current supply device 50 is finally stopped. The increase in frictional heat can also be achieved by controlling the sliding device 70.

  Immediately before ending the second joining step S13, the sliding device 70 is stopped. In order to join the members 10 and 20 to be joined at a desired relative position, the sliding member 70 is finally used by the sliding device 70. , 20 are positioned at desired positions. In addition, since positioning accuracy falls when the pressurizing force of the pressurizing device 80 is large, the pressurizing force by the pressurizing device 80 may be lowered before the sliding device 70 is stopped. When the pressure applied by the pressurizing device 80 is lowered, the positioning accuracy of the members to be joined 10 and 20 is improved, and the sliding device 70 can be stopped in a state where the members to be joined 10 and 20 are in a desirable relative position. it can. In addition, you may provide the other structure for positioning the to-be-joined member 10 and 20 separately.

  After the second bonding step S13, a cooling step S14 is performed. In the cooling step S <b> 14, the control device 90 stops the sliding device 70 and the current supply device 50 and increases the pressure applied by the pressurizing device 80. Then, when the preset time has elapsed, it is determined that the cooling has ended, and the pressurization by the pressurizing device 80 is ended. Alternatively, after a signal input to the control device 90 from a thermometer (not shown) that measures the temperatures of the members to be joined 10 and 20 is equal to or less than a predetermined value, it is determined that the cooling is finished, and the pressurizing device 80 Pressurization can also be terminated. Thereafter, the electrodes 42 and 44 are retracted, and the joined members 10 and 20 joined are removed from the apparatus. Thereby, joining of the to-be-joined members 10 and 20 is completed.

  A diffusion bonding surface bonded by diffusion of the material of the members to be bonded 10 and 20 to the bonding interface of the members to be bonded 10 and 20 bonded by the bonding method of the present embodiment, and the material of the members to be bonded 10 and 20 Are formed by mixing a plastic flow joint surface joined by plastic flow and an intermediate layer joint surface joined via the intermediate member 30.

  In the first joining step S <b> 12 and the second joining step 13, the intermediate member 30 becomes a liquid phase with a low melting point by a eutectic reaction, and the members to be joined 10, 20 or the intermediate member 30 to the members to be joined 10, 20 Promote interdiffusion. Further, since the intermediate member 30 plays a role of blocking oxygen and suppressing re-oxidation of the joint surfaces 10a and 20a, it can be joined in the atmosphere for a short time with low heat input, and mass production is facilitated. .

  In the present bonding method, since sliding and resistance heating are used in combination, the current concentration location is changed and uniform heating is possible without applying high pressure to the bonding surfaces 10a and 20a, and the bonding surface 10a. , 20a can be joined even when they have a large area or a complicated shape, and uniform surface joining is possible with low distortion. In addition, since only the surface layers of the joining surfaces 10a and 20a are melted and joined, the heating time can be shortened, and even in a cast product containing gas in the material, the gas in the material expands due to heating. Therefore, it is difficult to eject and good bonding can be realized.

  The member to be joined 10 is vibrated in one direction along the joining surfaces 10a and 20a, but is not limited to this as long as it slides relatively. For example, the joining surface 10a can be a revolving motion or the like. , 20a can be vibrated in two directions.

  Further, the preliminary sliding step S11 can be omitted without necessarily providing it. In addition, instead of sliding by the sliding device 70 instead of the preliminary sliding step S11 or before the preliminary sliding step S11, current is supplied to the electrodes 42 and 44 by the current supply device 50, so that the joining surface is obtained. 10a and 20a may be softened by resistance heating. In addition, the first joining step S12 and the second joining step S13 can be performed as one joining step without increasing the pressure while reducing the supply of current between the first joining step S12 and the second joining step S13. It can also be implemented. Further, the cooling step S14 can be omitted without always being provided.

  According to the joining procedure as described above, since the members to be joined 10 and 20 (water jacket upper 103, water jacket lower 104) are joined by resistance heating while sliding, the high surface pressure heated by resistance heating is increased. Sliding acts on the part to cause wear and plastic flow, and the surface pressure of the high surface pressure part decreases, so that the current concentration portion changes from moment to moment. Thereby, the joining surfaces 10a and 20a can be heated uniformly, and the whole joining surfaces 10a and 20a can be joined uniformly, and a stable joining strength can be obtained even on a plurality of joining surfaces 10a and 20a that are not on the same plane. . Therefore, when the split surfaces 120 for forming the hollow passages 110 and 111 and extending along the axis 112 of the hollow passages 110 and 111 are set as the joining surfaces 10a and 20a that are not on the same plane. In addition, it is possible to obtain the joined members 10 and 20 (water jacket upper 103 and water jacket lower 104) having stable joining strength.

  By applying the joining method of the present embodiment to the joining surface P3 between the water jacket upper 103 and the water jacket lower 104, the water jacket upper 103 and the water jacket lower 104 can be molded by a mold. The sand core, which was conventionally required to form the water jacket space, is no longer necessary. By eliminating the sand core, it is possible to optimize the shape of the water jacket space and facilitate processing. Furthermore, by applying the joining method of the present embodiment to the other joining surfaces P1, P2, and P4, the sand core that has been conventionally required in each part is not required, and the overall weight and workability of the cylinder head 100 are reduced. Improvements can be made.

  As described above, the bonding method according to the present embodiment is a bonding method for bonding a pair of members to be bonded 10 and 20 that are made of a conductive material and have a bonding surface that is not on the same plane. The bonding surfaces 10a and 20a of the members to be bonded 10 and 20 are opposed to each other and the pair of members to be bonded 10 and 20 are relatively slid while a current is passed from one of the members to be bonded 10 and 20 to the other. It has a joining process which joins joining surfaces 10a and 20a by heating. Further, as the joint surfaces 10a and 20a that are not on the same plane, a split surface 120 for forming the hollow passages 110 and 111 and extending along the axis 112 of the hollow passages 110 and 111 is set. . According to such a joining method, since the joined members 10 and 20 are slid and joined by resistance heating, the sliding acts on the high surface pressure portion heated by the resistance heating, thereby causing wear and plastic flow. As the surface pressure of the high surface pressure portion decreases, the current concentration location changes from moment to moment. Thereby, the joining surfaces 10a and 20a can be heated uniformly, the whole joining surfaces 10a and 20a can be joined uniformly, and stable joining strength can be obtained even on a plurality of joining surfaces that are not on the same plane. Therefore, even when the split surface 120 for forming the hollow passages 110 and 111 and extending along the axis 112 of the hollow passages 110 and 111 is set as a joint surface that is not on the same plane, the surface is stable. Bonding strength can be obtained.

  The split surface 120 is set at a portion 121 where the dimension in the direction in which the split surface 120 extends is the maximum when viewed in a cross section orthogonal to the axis 112 of the hollow passages 110 and 111. Vibrations can be transmitted evenly to achieve uniform bonding.

  When the sliding is generated by vibration in one direction and the joining region, that is, the joining surface of the members to be joined 10 and 20 has a shape that allows vibration in one direction, the members to be joined 10 and 20 are easily caused by vibration. Can be joined.

  The members to be bonded 10 and 20 are members to be bonded that are suitable for application to the above-described bonding method, and are split surfaces 120 for forming the hollow passages 110 and 111 as the bonding surfaces 10a and 20a that are not on the same plane. Thus, even when the split surface 120 extending along the axis 112 of the hollow passages 110 and 111 is set, a stable joint strength can be obtained.

  The members to be joined 10 and 20 are applied to the cylinder head 100, and if the hollow passages 110 and 111 are at least one of an intake port and an exhaust port, a sand core that has been conventionally required is unnecessary, and the entire cylinder head 100 is not required. It is possible to reduce weight and improve workability.

10, 20 member to be joined,
10a, 20a joint surface,
30 intermediate member,
40 joining device,
42 first electrode,
44 second electrode,
50 current supply device,
60 holding device,
70 sliding device,
80 pressure device,
82 pressurizing part,
84 support structure,
90 control device,
100 cylinder head,
101 cam carrier,
102 Upper deck,
103 Water jacket upper,
104 Water jacket lower,
105 Lower deck,
110 Intake port (hollow passage),
111 exhaust port (hollow passage),
112 axis,
120 facets,
130 Water jacket space,
P1 Joint surface between cam carrier and upper deck,
Joint surface between P2 upper deck and water jacket upper,
P3 Water jacket upper and water jacket lower joint surface,
P4 Joint surface between water jacket lower and lower deck.

Claims (3)

A joining method for joining a pair of members to be joined having a joining surface that is not on the same plane, made of a conductive material,
By facing the bonding surfaces of the members to be bonded to each other and sliding the pair of the members to be bonded relatively, current is passed from one of the members to be bonded to the other, thereby resistance heating. Having a joining step of joining the joining surfaces together,
As a bonding surface not coplanar, Ri Na is set to split surfaces extending along the axis of the hollow passage a split surface to form a hollow passage,
The sliding is generated by vibration in one direction, and the one-way direction is formed in a direction intersecting the direction in which the split surface extends along the axis of the hollow passage in the joining region of the pair of members to be joined. A joining method that uses vibration .   2. The joining method according to claim 1, wherein the split surface is set at a portion where a dimension in a direction in which the split surface extends is maximized when viewed in a cross section orthogonal to the axis of the hollow passage. The joining method according to claim 1 or 2, wherein the joining method is applied to a cylinder head, and the hollow passage is at least one of an intake port and an exhaust port .

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