JP5509749B2 - Construction method of joint structure - Google Patents

Description

  The present invention relates to a method for constructing a joint structure in which sheet metal members constituting a vehicle body are joined together.

  Conventionally, a welding technique such as spot welding or laser welding or a bonding method using an adhesive has been adopted as a means for joining sheet metal members constituting a vehicle body.

  In particular, in recent years, as disclosed in Patent Document 1, it is an adhesive that hardens while self-generating internal energy by energy applied to a part from the outside, and is adjacent to the site where the internal energy is generated. An adhesion method using a chain-reaction type adhesive in which a portion that receives the internal energy receives the internal energy and further undergoes a curing reaction while self-generating the internal energy is attracting attention. In this method using an adhesive, the adhesive is applied to the adhesive member, and the adhesive is sequentially cured by applying energy from outside to a predetermined portion of the adhesive. Then, the adhesive members are joined together by curing the adhesive.

JP-A-11-193322

  In the method using the chain reaction type adhesive, a part of the energy applied to the adhesive and the internal energy of the adhesive escapes from the adhesive to the adhesive member side. When the escape amount is large, the adhesive may not be heated to a temperature at which it can be cured, and the curing reaction of the adhesive may stop halfway. As a method of avoiding the stop of the curing reaction, it is conceivable to increase the amount of energy applied from the outside, but in this case, energy efficiency is deteriorated.

In order to solve the above-described problem, the present invention provides a method for constructing a joint structure in which a joint surface of an adhesive member and a joint surface of a member to be bonded arranged at a position separated from the adhesive member are joined together. In this case, as the adhesive member, an adhesive member in which a first adhesive portion and a second adhesive portion, which are different in at least one of materials or shapes, are arranged adjacent to each other along a specific direction, and is partially provided from the outside. with curing while generating a curing reaction heat by applying energy, a portion adjacent to the site where the curing reaction heat has occurred by causing a curing reaction while generating a further curing reaction heat by receiving the curing reaction heat A chain reaction type first adhesive that cures in a chain manner is disposed between the joint surface of the first adhesive portion and the joint surface of the adherend member, and the energy applied to a part from the outside With curing while generating a curing reaction heat by chromatography, chain manner by a portion adjacent to the site where the curing reaction heat is generated causes a curing reaction while generating a further curing reaction heat by receiving the curing reaction heat An adhesive disposing step of disposing a chain reaction type second adhesive to be cured between the bonding surface of the second bonding portion and the bonding surface of the member to be bonded in succession to the first adhesive; Implemented after the energy application adhesive determination step of determining any one of the first adhesive and the second adhesive as an energy application adhesive that applies energy from the outside, and the adhesive placement step, Energy is given to the energy-given adhesive determined in the energy-giving adhesive determination step, and the energy-given adhesive and the other adhesive are cured in a chain along the specific direction. A curing step of joining the adhesive member and the adherend member, wherein the energy-giving adhesive determining step has a smaller heat capacity of the heat capacity of the first adhesive part and the heat capacity of the second adhesive part. When the adhesive disposed on the adhesive part side is determined as the energy-giving adhesive, and the heat capacity of the first adhesive part and the heat capacity of the second adhesive part are the same, the joint surface of the first adhesive part An adhesive disposed on the adhesive portion side having a larger thermal resistance value among a thermal resistance value in a direction perpendicular to the first surface and a thermal resistance value in a direction perpendicular to the bonding surface of the second adhesive portion. The present invention provides a method for constructing a joint structure characterized in that it is determined as follows .

  According to this method, the entire adhesive is cured by maintaining the chain of the curing reaction of the adhesive across the first adhesive portion and the second adhesive portion with different materials or shapes while suppressing the energy applied to the adhesive, The bonding member and the member to be bonded can be reliably bonded. In other words, since the temperature easily rises when receiving energy from the adhesive in an adhesive part with a small heat capacity, the temperature difference between the adhesive and the adhesive part, and the amount of energy that escapes from the adhesive to the adhesive part side due to this temperature difference Can be kept small. Therefore, the energy applied by using the adhesive placed in the adhesive part with a small heat capacity as the energy-giving adhesive, applying energy from the outside to the adhesive, and starting the curing reaction of the adhesive from the adhesive part side. It is possible to maintain the curing reaction of the adhesive while keeping the value small. And while the curing reaction of the adhesive is chained on the adhesive part side where the heat capacity is small, the other adhesive part is heated by heat conduction from the one adhesive part, so that the other adhesive part also adheres. When the curing reaction of the agent is performed, the temperature difference between the adhesive portion and the adhesive is reduced, and the curing reaction of the adhesive can be maintained.

Furthermore, in an adhesive portion having a large thermal resistance value and difficult to dissipate heat, the amount of energy released from the adhesive side to the outside through the adhesive portion can be kept small. Therefore, by applying energy from the outside to the adhesive part side having such a large thermal resistance value and starting the curing reaction of the adhesive from the adhesive part side, curing of the adhesive while keeping the external energy small The reaction can be maintained. And while the curing reaction of the adhesive is chained on the adhesive part side where the thermal resistance value is small, the other adhesive part is warmed by heat conduction from the one adhesive part, so that also in the other adhesive part The curing reaction of the adhesive can be maintained.

Moreover, in this invention, it is preferable to provide energy to the edge part of the said specific direction of the said energy provision adhesive, and the edge part on the opposite side to the side by which the other adhesive agent is arrange | positioned in the said hardening process. (Claim 2 ).

  In this case, the temperature of the other adhesive portion is sufficiently warmed while the adhesive curing reaction is being performed in the adhesive portion having a small heat capacity or the adhesive portion having a large thermal resistance value. It is possible to more reliably maintain the curing reaction of the adhesive.

Here, in the present invention, since the curing reaction of the adhesive can be more reliably maintained without differentiating the thickness and type of the first adhesive and the second adhesive, the joint surface of the first adhesive portion and the distance between the bonding surface of the bonded component, the second bonding surface of the bonding portion between the distance and the same of the bonding surface of the adhesive member, with the adhesive disposing step, the first adhesive and The same type of adhesive is disposed as the second adhesive, and the first adhesive and the second adhesive are disposed in the direction perpendicular to the bonding surface of the adhesive member of the first adhesive and the second adhesive. and bonding surface of the adhesive member of the adhesive and the thickness of the vertical direction is arranged such that the same can be easily arranged an adhesive between the adhesive member and the adhesive member (claim 3 ).

Moreover, this invention is implemented before the said adhesive arrangement | positioning process, and also includes what is provided with the tailored blank process which joins the said 1st adhesion part and the said 2nd adhesion part mutually by a tailored blank construction method (Claim 4 ). .

  As described above, according to the present invention, the chain of the curing reaction of the adhesive can be more reliably maintained while suppressing the amount of energy applied to the adhesive.

It is a schematic plan view of the side frame outer panel to which the construction method of the joint structure according to the present invention is applied. It is a schematic plan view of the center pillar inner panel shown in FIG. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is a schematic plan view of the side frame outer panel shown in FIG. It is the VV sectional view taken on the line of FIG. It is a figure which shows the outline | summary of the adhesive agent coating apparatus for apply | coating an adhesive agent. It is explanatory drawing which shows the aspect of an adhesive agent arrangement | positioning process. It is explanatory drawing which shows the aspect of an adhesive agent arrangement | positioning process. It is explanatory drawing which shows the aspect of a hardening process. It is a figure which shows the other example to which the construction method of the junction structure which concerns on this invention was applied. It is a figure which shows the other example to which the construction method of the junction structure which concerns on this invention was applied. It is a figure for demonstrating the experiment example regarding the construction method of the junction structure which concerns on this invention.

  Hereinafter, a preferred embodiment of a method for constructing a joint structure according to the present invention will be described with reference to the drawings. In the method for constructing a joint structure according to the present invention, the first adhesive portion and the second adhesive portion, which are different in at least one of materials or shapes, are disposed adjacent to each other along a specific direction and are bonded. This is a method for constructing a joint structure in which the joint surfaces of the members are joined together. Here, as shown in FIG. 1, a side frame outer panel 10 that is an adherend member and a center pillar inner panel 20 that is an adhesive member are joined together, and a joining structure 100 is formed on a center pillar (so-called B pillar) of an automobile. The case where it is constructed will be described. Here, a first inner flange 34 described later formed on the center pillar inner panel 20 corresponds to the first bonding portion, and a second inner flange 44 described later formed on the center pillar inner panel 20 is second bonded. It corresponds to the part.

  2 is a schematic plan view of the center pillar inner panel 20, FIG. 3 is a sectional view taken along line II-II in FIG. 1, and FIG. 4 is a sectional view taken along line III-III in FIG. The center pillar inner panel 20 includes a first panel 30 that extends in the vertical direction and is disposed at the lower part of the vehicle body, and a second panel 40 that extends in the vertical direction and is disposed at the upper part of the vehicle body. The first panel 30 and the second panel 30 are adjacent to each other in the vertical direction. As will be described later, the center pillar inner panel 20 is pressed after a plate material constituting the first panel 30 and a plate material constituting the second panel 40 are integrally joined by laser welding or the like by a tailored blank method. It is formed by. Here, the first panel 30 and the second panel 40 are formed of the same material, for example, a steel plate.

  The first panel 30 is formed with a flange 34 (first adhesive portion, hereinafter referred to as a first inner flange 34) by pressing, and the second panel 40 is formed with a flange 44 (second adhesive portion, hereinafter referred to as “first inner flange 34”) by pressing. 2nd inner flange 44) is formed. The 1st inner flange 34 and the 2nd inner flange 44 are adjacent to the up-down direction, and all are formed with the steel plate. The first inner flange 34 and the second inner flange 44 have horizontal widths W1 and W2 (see FIG. 2) and vertical lengths L1 and L2 (see FIG. 4) set to the same value. On the other hand, the thicknesses d1 and d2 (see FIG. 4) are set to different values. For example, the thickness d1 of the first panel 30 is 0.8 mm, and the thickness d2 of the second panel 40 is set to 1.6 mm.

  FIG. 5 is a schematic plan view of the side frame outer panel 10, and FIG. 6 is a cross-sectional view taken along the line V-V in FIG. The side frame outer panel 10 is formed with a front opening 11 to which a front door is attached and a rear opening 12 to which a rear door is attached. A flange 14 (hereinafter referred to as an outer flange 14) is formed around the front opening 11 and the rear opening 12.

  As shown in FIG. 1 and the like, the side frame outer panel 10 and the center pillar inner panel 20 are center pillar inner panels in a region between the front opening 11 and the rear opening 12 in the side frame outer panel 10. 20 is attached, and the outer flange 14 and the first inner flange 34 and the second inner flange 44 of the center pillar inner panel 20 are bonded to each other by being bonded with an adhesive 4. Specifically, as shown in FIG. 10 and the like, the vehicle body inner surface (joint surface) 14 a of the outer flange 14, the vehicle body outer surface (joint surface) 34 a of the first inner flange 34, and the vehicle outer side of the second inner flange 44. The surface (bonding surface) 44 a is bonded by the adhesive 4. Then, by this adhesion, the first inner flange 34 and the second inner flange 44 are joined via the side frame outer panel 10 and the adhesive 4.

In the method for constructing the bonded structure, a chain reaction type adhesive is used as the adhesive 4. Specifically, the adhesive 4 includes a photopolymerizable resin (mainly an epoxy resin, particularly preferably an alicyclic epoxy resin), a photo / thermal polymerization initiator (such as an aromatic sulfonium salt), and a photopolymerization initiator ( A resin composition mainly composed of a sulfonium salt, etc., which is ultraviolet ray, electron beam, X-ray, infrared ray, solar ray, visible ray, laser beam (excimer laser, CO ₂ , laser, etc.), heat ray (radiation or radiant heat) Etc.), or a predetermined amount of energy such as heat is applied, so that cations and heat of curing reaction are positively generated in the interior, and the cations and heat of curing reaction are linked in a chain. Use a curing reaction.

  Further, an apparatus as shown in FIG. 7 is used as the adhesive application device 110 for applying the adhesive 4. The adhesive application device 110 includes a nozzle 112 that discharges the adhesive 4 stored in a tank (not shown), a hose 114 that guides the adhesive 4 to the nozzle 112, and a drive robot 115 that drives the nozzle 112. And have.

  The construction method of the present joint structure using the adhesive 4 or the like includes the following steps.

1) Tailored Blank Step This step is a step of forming the center pillar inner panel 20 having the first panel 30 and the second panel 40 as described above.

  In this step, first, a first steel plate constituting the first panel 30 and a second steel plate constituting the second panel 40 having a thickness greater than that of the steel plate are welded by a laser or the like. Then, the steel plate that has become one material by welding is pressed to form the first panel 30 having the first inner flange 34 by the first steel plate, and the first inner flange 34 by the second steel plate. The second panel 40 having the second inner flange 44 having a larger thickness is formed. In this way, in this step, the center pillar inner panel 20 is formed in which the first panel 30 and the second panel 40, and thus the first inner flange 34 and the second inner flange 44, are integrally welded.

2) Adhesive placement step This step is a step of placing the adhesive 4 between the first inner flange 34 and the second inner flange 44 and the outer flange 14.

  In this step, first, as shown in FIG. 8, the adhesive 4 is applied to the vehicle body inner surface 14 a of the outer flange 14. Specifically, the thickness of the adhesive 4 supplied from the nozzle 112 through the hose 114 by driving the driving robot 115 of the adhesive application device 110 on the inner surface 14a of the outer flange 14 is increased. That is, the outer flange 14 is discharged so that the height in the direction perpendicular to the vehicle body inner surface 14a is constant over the vehicle body inner surface 14a.

  Next, as shown in FIG. 9, the center pillar inner panel 20 formed with the first inner flange 34 and the second inner flange 44 is connected to the vehicle body outer surface 34 a and the second inner flange of the first inner flange 34. The adhesive 4 is sandwiched between the outer surface 44a of the vehicle body 44 and the inner surface 14a of the outer flange 14 so as to be placed on the side frame outer panel 10. At this time, the vehicle body outer surface 34a of the first inner flange 34, the vehicle body outer surface 44a of the second inner flange 44, and the vehicle body inner surface 14a of the outer flange 14 are made parallel to each other.

3) Energy-giving adhesive determination step In this method, in the curing step described later, the adhesive (first adhesive) 4 disposed on the first inner flange 34 side and the second inner flange 44 side are disposed. Energy serving as a trigger is applied only to one side of the adhesive (second adhesive) 4 and the adhesive 4 is cured in a chain manner starting from the applied portion. In this step, it is determined which of the first inner flange 34 and the second inner flange 44 is to be provided with the trigger energy.

  The present inventors conducted an experiment in which an adhesive member composed of a first adhesive portion and a second adhesive portion having different shapes or materials using a chain reaction type adhesive is bonded to an adherend member. When the heat capacity of the first adhesive part and the second adhesive part is different, the adhesive disposed on the first adhesive part side and the adhesive disposed on the second adhesive part side are performed. Depending on whether the trigger energy is applied to any of the agents, even when the same energy is applied, the curing reaction of the adhesive may or may not be chained across the entire adhesive member. In other words, in order to maintain the curing reaction over the entire adhesive member depending on which of the adhesive disposed on the first adhesive portion side and the adhesive disposed on the second adhesive portion side is applied with a trigger energy. As a result, the energy applied to the slab was different.

  For example, as shown in FIG. 13, an aluminum plate having a length L530 = 37.5 mm, a thickness d530 = 2.0 mm, and a width (direction perpendicular to the paper surface) 37.5 mm as the first adhesive portion 530 and the second adhesive portion The adhesive member 520 is configured by arranging an aluminum plate having a length L540 = 37.5 mm as a 540, a thickness d540 = 1.2 mm, and a width (direction perpendicular to the paper surface) of 37.5 mm adjacent to the length direction. When energy is applied to the chain reaction type adhesive 504 disposed between the adhesive member 520 and the adherend member 510, the longitudinal direction end portion 530e of the first adhesive portion 530 having a small thickness is applied. When energy as a trigger is applied, the curing reaction is chained over the entire adhesive 504, but the same amount of energy is applied to the end 540e in the length direction of the second adhesive portion 540 having a large thickness. Upon grant was stopped before the curing reaction of the adhesive 504 is linked to the first adhesive portion 530 side. In this experiment, an aluminum plate having a length L = 100 mm, a thickness d3 = 1.2 mm, and a width 25 mm is used for the member 510 to be bonded, and 100 parts by weight of an alicyclic epoxy resin is used as a main agent for the adhesive 504. A chain reaction type adhesive 504 in which a curing agent composed of a total of 3 parts by weight of an aromatic sulfonium salt and a sulfonium salt was mixed was used, and the thickness of the adhesive 504 was set to d504 = 1.0 mm.

  As described above, the temperature difference between the adhesive 504 and the first adhesive portion 530 is caused by the temperature increase easily because the aluminum plate of the first adhesive portion 530 has a smaller thickness and a smaller heat capacity. This is considered to be because the amount of energy that moves from the adhesive 504 toward the adhesive member 520 is suppressed to be smaller than the temperature difference between the second adhesive portion 540 and the second adhesive portion 540. That is, it is considered that energy is more reliably transmitted in the adhesive 504 by suppressing the amount of energy escaping from the adhesive 504 to the outside. Then, while the curing reaction of the adhesive 504 is chained in the first adhesive part 530, the second adhesive part 540 is warmed by heat conduction from the first adhesive part 530, and the curing reaction of the adhesive 504 is second. When the temperature of the second adhesive portion 540 is sufficiently increased when the adhesive portion 540 is reached, the temperature difference between the second adhesive portion 540 and the adhesive 504 is suppressed to be small in the second adhesive portion 540 as well. It is considered that energy transfer within the agent 504 is maintained.

  Further, the inventors have different heat resistance values in the direction perpendicular to each bonding surface that comes into contact with the adhesive even if the heat capacities of the first adhesive portion and the second adhesive portion are the same. When the thickness in the direction perpendicular to the one joining surface having conductivity is different, or when the thickness is the same while the thermal conductivity is different, the adhesive disposed on the first bonding portion side and the second bonding are provided. Depending on whether to apply energy as a trigger to which of the adhesives arranged on the part side, even if the same energy is applied, the adhesive curing reaction may or may not be chained across the entire adhesive member, That is, the result was that the energy applied to maintain the curing reaction over the entire adhesive member was different. Specifically, it is possible to avoid the chain of the curing reaction from stopping by applying energy as a trigger to the adhesive disposed on the adhesive portion (for example, the first adhesive portion) side having a large thermal resistance value. The results show that the chain of curing reaction can be maintained with smaller energy.

  This is because the amount of energy released from the adhesive side to the outside through the adhesive part per unit time is kept small in the adhesive part where heat resistance is large and difficult to dissipate heat, so that the energy can be more reliably stored in the adhesive. It is thought to convey. Then, while the curing reaction of the adhesive is chained in one adhesive portion having a large thermal resistance value, the other adhesive portion is heated by heat conduction from the one adhesive portion, so that the other adhesive portion This is also because energy transmission in the adhesive is maintained.

  As mentioned above, in this energy provision adhesive determination process, the heat capacity | capacitance of a 1st adhesion part and the heat capacity of a 2nd adhesion part are compared, and the adhesive agent (energy provision adhesive) arrange | positioned at a smaller heat capacity Decide to give energy to trigger. Further, when the heat capacity of the first adhesive portion and the second adhesive portion is the same, the thermal resistance values of the respective adhesive portions are compared, and an adhesive (energy application) arranged in the adhesive portion having a larger thermal resistance value is compared. Decide to apply energy as a trigger to the adhesive.

  In the case of constructing the joint structure 100 in the center pillar in the present embodiment, as described above, the first inner flange 34 corresponding to the first adhesive portion and the second inner flange 44 corresponding to the second adhesive portion are the same. While the length and width are made of the same material, the first inner flange 34 is set to be thinner, and the first inner flange 34 has a smaller heat capacity. Therefore, in this energy application adhesive determination process, it determines so that the energy which becomes a trigger may be provided to the adhesive 4 arrange | positioned at the 1st inner flange 34. FIG.

4) Curing step This step is a step of curing the adhesive 4 by applying energy that triggers a curing reaction to the adhesive 4.

  In this step, energy is applied to the adhesive 4 by ultraviolet irradiation. That is, as shown in FIG. 10, the adhesive 4 disposed on the first inner flange 34 is irradiated with ultraviolet rays by a UV irradiation device 130 which is a well-known device capable of irradiating ultraviolet rays.

  Specifically, ultraviolet rays are applied to the adhesive 4 exposed at the upper end portion 34e of the first inner flange 34, that is, the end portion 34e opposite to the second inner flange 44 among the upper and lower ends of the first inner flange 34. Irradiate. The adhesive 4 irradiated with ultraviolet rays starts to cure while generating cations and heat of curing reaction therein.

  The temperature of the adhesive 4 rises due to the irradiation of ultraviolet rays and the generation of curing reaction heat, and a temperature difference is generated between the adhesive 4 and the first inner flange 34. Therefore, a part of the energy in the adhesive 4 moves to the first inner flange 34 side with this temperature difference. However, as described above, the heat capacity of the first inner flange 34 is small, and the temperature of the first inner flange 34 rises early upon receiving the energy. Therefore, the energy transferred from the adhesive 4 to the first inner flange 34 is kept small, and the curing reaction of the adhesive 4 is maintained throughout the first inner flange 34. This curing reaction is arranged on the second inner flange 44 side. The adhesive 4 is chained. While the curing reaction of the adhesive 4 is chained in the first inner flange 34, the temperature of the second inner flange 44 is increased by heat conduction from the first inner flange 34, and this second inner flange 44 side The temperature of the second inner flange 33 is raised to some extent when the curing reaction of the adhesive 4 has proceeded. Therefore, on the second inner flange 44 side, the energy that moves from the adhesive 4 to the second inner flange 44 is suppressed to be small, and the curing reaction of the adhesive 4 is performed over the entire second inner flange 44.

  In this way, in this step, the adhesive 4 is cured to join the outer flange 14 to the first inner flange 34 and the second inner flange 44.

  As described above, in the construction method of the present bonded structure, the adhesive 4 disposed on the first inner flange 34 having a small heat capacity is irradiated with ultraviolet rays, and a curing reaction is caused from the adhesive 4 on the first inner flange 34 side. By starting, the chain of the curing reaction of the adhesive 4 is more reliably maintained without increasing the energy applied to the adhesive 4, and the first inner flange 34, the second inner flange 44, and the outer The flange 14 can be more reliably joined.

  In this method, when the heat capacity of the first inner flange 34 is the same as the heat capacity of the second inner flange 44, the heat resistance value of the first inner flange 34 is larger than the heat resistance value of the second inner flange 44. Also, the same effects as those of the embodiment can be obtained.

  In this case, it determines so that the energy which becomes a trigger may be provided to the 1st inner flange 34 with a large thermal resistance value in the said energy provision adhesive determination process. And the ultraviolet-ray is irradiated to the adhesive agent 4 arrange | positioned at this 2nd inner flange 34 at the said hardening process.

  By being irradiated with ultraviolet rays, the adhesive 4 starts a curing reaction while generating a curing reaction heat. At this time, the temperature of the adhesive 4 rises by the irradiation of ultraviolet rays and the generation of reaction heat of the curing reaction started by the irradiation of ultraviolet rays. Thereby, in the 1st inner flange 34, a temperature difference arises between the surface which contact | connects the adhesive agent 4, and the surface which contact | connects the exterior which opposes this surface. The energy moves from the adhesive 4 to the outside through the first inner flange 34 in accordance with this temperature difference. However, the heat resistance value of the first inner flange 34 is large, and the amount of energy that moves to the outside through the first inner flange 34 is suppressed to be small. Therefore, the curing reaction of the adhesive 4 is maintained throughout the first inner flange 34. The temperature of the second inner flange 44 is increased by heat conduction from the first inner flange 34 while the curing reaction of the adhesive 4 is chained in the first inner flange 34. As a result, the second inner flange 44 The energy transferred from the adhesive 4 to the second inner flange 44 on the side is kept small, and the chain of curing reaction of the adhesive 4 is maintained also in the second inner flange 44, and the first inner flange 34 and the second inner flange 44 are maintained. And the outer flange 14 are securely joined.

  Here, the position where the ultraviolet ray is irradiated in the curing step is not limited to the upper end portion 34 e of the first inner flange 34. For example, as shown in FIG. 11, a through hole 34 penetrating front and back is formed in a substantially central portion of the first inner flange 34 in the vertical direction, and the adhesive 4 exposed in the through hole 34 is irradiated with ultraviolet rays. It may be. However, if the upper end portion 34e of the first inner flange 34 is irradiated with ultraviolet rays and the curing reaction of the adhesive 4 is started from the upper end portion 34e, the curing reaction of the adhesive 4 proceeds to the second inner flange 44 side. Thus, the temperature of the second inner flange 44 can be sufficiently increased by the heat conduction from the first inner flange 34 until this time is advanced. Therefore, when the curing reaction of the adhesive 4 proceeds in the second inner flange 44, the temperature difference between the adhesive 4 and the second inner flange 44 can be further reduced, and the chain of the curing reaction of the adhesive 4 can be reduced. It can be maintained more reliably.

  In the adhesive placement step, an adhesive 104 disposed between the first inner flange 34 and the outer flange 14 and an adhesive 204 disposed between the second inner flange 44 and the outer flange 14 are provided. Different types of adhesives may be used. Further, the thickness of the adhesive 104 between the first inner flange 34 and the outer flange 14 and the thickness of the adhesive 204 between the second inner flange 44 and the outer flange 14 may not be the same. However, in this method, since the curing reaction of the adhesive can be more reliably maintained without changing the thickness and type of these adhesives, the first inner flange 34, the second inner flange 44, the outer flange 14, If the same kind of adhesive is arranged with the same thickness between the two, the adhesive can be arranged more easily.

  Further, the tailored blank process can be omitted.

  The specific configuration of the adhesive 4 is not limited to the above. For example, a solid adhesive or a liquid adhesive may be used, and these may be applied or filled between the first inner flange 34 and the second inner flange 44 and the outer flange 14.

  In the curing step, the specific method for curing the adhesive 4 is not limited to the above.

  Further, the application of this method is not limited to the case where the joint structure 100 is constructed on the center pillar.

4 Adhesive 10 Side frame outer panel (bonded member)
14 Outer flange 20 Center pillar inner panel (adhesive member)
30 1st panel 34 1st inner flange (1st adhesion part)
40 Second panel (second adhesive member)
44 2nd inner flange (2nd adhesion part)

Claims (4)

A method for constructing a joint structure that constructs a joint structure in which a joint surface of an adhesive member and a joint surface of a member to be bonded arranged at a position spaced apart from the adhesive member are joined together,
As the adhesive member, an adhesive member in which a first adhesive part and a second adhesive part, which are different in at least one of material or shape, are disposed adjacent to each other along a specific direction,
With curing while generating a curing reaction heat by applying energy to a portion from the outside, while a portion adjacent to the site where the curing reaction heat has occurred to generate a further curing reaction heat by receiving the curing reaction heat cure A chain reaction type first adhesive that cures in a chain by causing a reaction is disposed between the bonding surface of the first bonding portion and the bonding surface of the adherend, and is applied to a part from the outside. Curing while generating the curing reaction heat by the energy generated, and the part adjacent to the site where the curing reaction heat is generated receives this curing reaction heat and causes the curing reaction while generating the curing reaction heat. An adhesive disposing step of disposing a chain reaction type second adhesive that cures in a continuous manner between the bonding surface of the second bonding portion and the bonding surface of the member to be bonded in succession to the first adhesive; ,
An energy imparting adhesive determining step for determining any one of the first adhesive and the second adhesive as an energy imparting adhesive that imparts energy from the outside;
Implemented after the adhesive placement step, energy is applied to the energy-given adhesive determined in the energy-giving adhesive determination step, and the energy-given adhesive and the other adhesive are along the specific direction. A curing step of joining the adhesive member and the adherend member by chain curing,
In the energy application adhesive determination step, an adhesive disposed on the adhesive part side having a smaller heat capacity out of the heat capacity of the first adhesive part and the heat capacity of the second adhesive part is determined as the energy application adhesive , When the heat capacity of the first adhesive part and the heat capacity of the second adhesive part are the same, the thermal resistance value in the direction perpendicular to the joint surface of the first adhesive part and the perpendicular to the joint surface of the second adhesive part A bonding structure construction method , wherein an adhesive disposed on an adhesive portion side having a larger thermal resistance value among thermal resistance values in any direction is determined as the energy-giving adhesive . A method for constructing a joint structure according to claim 1,
  In the curing step, energy is applied to an end portion in the specific direction of the energy application adhesive, which is opposite to the side on which the other adhesive is disposed. Construction method. A method for constructing a joint structure according to claim 1 or 2,
  The distance between the bonding surface of the first bonding portion and the bonding surface of the bonded member is the same as the distance between the bonding surface of the second bonding portion and the bonding surface of the bonded member;
  In the adhesive placement step, the same type of adhesive is placed as the first adhesive and the second adhesive, and the first adhesive and the second adhesive are bonded to the first adhesive. A method for constructing a joint structure, characterized in that the thickness in the direction perpendicular to the joint surface of the member and the thickness of the second adhesive in the direction perpendicular to the joint surface of the adhesive member are the same. A method for constructing a joint structure according to any one of claims 1 to 3,
  A method for constructing a joint structure, comprising a tailored blank step that is performed before the adhesive placement step and joins the first adhesive portion and the second adhesive portion to each other by a tailored blank method.

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