JP2012153008A - Resin component jointing structure body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin component in which all components are deposited by oscillating an oscillation applying component in a necessary minimum size and the joint strength is maintained when two or more large resin components are integrally jointed.SOLUTION: In the resin component jointing structure body, deposition parts of two or more of resin components to be subjected to friction 1, 2, 3, 4 are abutted and deposited by oscillation to the oscillation applying resin component 5 to which oscillation is applied, thus, three or more of the resin components are integrally jointed through a deposition surface formed by the deposition part of the oscillation applying resin component and the deposition part of two or more of the resin components to be subjected to friction.

Description

  The present invention relates to a resin component bonding structure suitable for various machine components, particularly automobile floor panels, obtained by bonding a plurality of resin components by vibration welding.

  In recent years, in addition to rigidity and strength, light weight has been strongly demanded in all structures such as buildings, transportation equipment, and information equipment. In particular, in the automobile field of transportation equipment, a significant reduction in energy consumption is expected due to weight reduction, so achieving lightweight as well as rigidity and strength is a major technical development issue.

  As a method for achieving weight reduction, a combination of two or more large members having a width and length exceeding 1000 mm, such as an automobile floor made of carbon fiber reinforced resin (hereinafter may be abbreviated as CFRP). When obtaining rigidity, mechanical joining methods such as screws, rivets and bolts and joining methods using adhesives are used as an integral method, but there are limits to mass production due to increased processing steps, reducing production costs There is a problem that it is difficult to measure and its application is limited due to its appearance. On the other hand, when using CFRP with thermoplastic resin as a matrix, vibration welding is one of the effective means. However, vibration welding requires both vibration-side and fixed-side components, which increases costs. A large jig is required. Moreover, it is necessary to align all the welding surfaces in a plane with respect to the pressing direction.

  As a method for reducing the size of the jig and changing the pressing direction on each welding surface, for example, in addition to the member to be bonded, the vibration member is brought into contact with the site to be vibration welded, and three or more members are vibration welded. It is possible. As a technique for joining three resin parts by vibration welding, a technique as described in Patent Document 1 is known, but this structure is a joining method limited to three parts, and in order to improve work efficiency. A large jig is required on the excitation side. In addition, the technique described in Patent Document 2 is known as a technique for efficiently vibrating and welding members of three or more parts, but this joining method cannot weld three or more parts at a time. .

Japanese Patent No. 3813109 JP 2008-087384 A

  When joining two or more large-sized resin parts integrally, a vibration part of the minimum necessary size is vibrated, all parts are welded, and a resin part that maintains the joining strength is provided.

  As a result of intensive studies, the present inventors have found that a specific resin component joined body obtained by vibration welding is effective in solving the above problems, and have completed the present invention. The configuration of the present invention is shown below.

1. When the welded parts of two or more rubbed resin parts are brought into contact with the vibration-exposed resin parts to which vibration is applied and vibration welded, these three or more resin parts are connected to the welded parts of the vibratory resin parts. In the resin part joint structure integrally joined via the welding surface A formed by the welded parts of the two or more rubbed resin parts, the area of the welded part of the vibration resin part has two or more It is equal to the total area of the welded parts of the friction resin parts,
One of the rubbed resin parts (first rubbed resin part) has a projecting portion B, and a part of the welding surface A is formed with the tip surface of the projecting portion B as a welding portion. The rubbed resin component (second rubbed resin component) has a hole portion into which the protruding portion B of the first rubbed resin component is inserted, and the outer edge portion of the hole portion is used as a welding portion. Whether a part of the welding surface A is formed,
Alternatively, there is one or more other rubbed resin parts (third rubbed resin parts) having holes, and the outer edges of these holes are welded parts, and the first and second A resin part joining structure, wherein the resin part joining structure is arranged so as to have an annual ring shape with respect to a welded part of a friction-resin part, and a part of the welding surface A is formed.
2. At least one of the second rubbed resin component and the third rubbed resin component has a projecting portion, and the hole portion is on the front end surface of the projecting portion. 2. The resin part bonded structure according to the above item 1, wherein the resin part is cylindrical.
3. Positioning means for holding the first rubbed resin component and positioning the second rubbed resin component and the third rubbed resin component with respect to the first rubbed resin component is provided. 3. The resin part bonded structure according to item 1 or 2.
4). A burr relief groove is provided on the inner side of the second rubbed resin component, and at least one burr between the welded portions of the first rubbed resin component, the second rubbed resin component, and the third rubbed resin component. 4. The resin part bonded structure according to any one of the above items 1 to 3, wherein a clearance gap is provided.
5. 5. The resin component joint structure according to any one of the above items 1 to 4, wherein at least one of the first rubbed resin component, the second rubbed resin component, and the third rubbed resin component is a hat-shaped one. .
6). Any one of 1 to 5 above, wherein at least one of the first rubbed resin component, the second rubbed resin component, and the third rubbed resin component is a molded body of a fiber reinforced resin material including random mat fibers. The resin component joining structure according to claim 1.
7). The floor for motor vehicles containing at least 1 the resin component joining structure in any one of said 1-6.

  According to the resin component joining structure of the present invention, when joining an automotive floor panel composed of resin parts having a width and length exceeding 1000 mm, the jig size on the excitation side is minimized, and each vibration location is The inclination of the weld surface can be set. In addition, a plurality of members can be joined at one time for each vibration location.

It is the block diagram and sectional drawing of an example of the resin component joining structure of this invention. It is a state figure which shows an example of the floor for motor vehicles using the resin component joining structure of this invention, (a) is a state figure before joining a floor panel, (b) is a state figure after joining. It is sectional drawing of the AA part of FIG.2 (b). FIG. 4 is an enlarged view of a resin component joint structure portion in FIG. 3. It is a state figure which shows the example of the resin component joining structure of this invention used for the floor for motor vehicles different from the thing of FIGS. It is sectional drawing of the BB part of FIG. It is a schematic diagram of the floor panel positioning method of FIG.

Embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto.
FIG. 1 is a configuration diagram and a cross-sectional view showing a case where the friction-resin parts 1 to 4 are joined by vibration welding. First, the friction-resin part 1 has a protruding portion 1y (protruding portion B). A part of the welding surface A (100) is formed with the front end surface of the protruding portion as a welded portion, and the rubbed resin component 2 has a hole 2h into which the protruding portion 1y of the rubbed resin 1 is inserted. In addition, a part of the welding surface A (100) is formed with the outer edge portion of the hole 2h as a welding portion. Similarly, the rubbed resin component 3 has a hole 3h into which the protruding portion 2y of the rubbed resin 2 is inserted, and the outer edge of the hole 3h is a welded portion of the welding surface A (100). Part is formed. Further, the rubbed resin component 4 has a hole 4h into which the protruding portion 3y of the rubbed resin component 3 is inserted, and the outer edge 4f of the hole 4h is a welded portion, and a welding surface A (100). Part of is formed.
Then, the vibrating resin component 5 is vibrated by the vibrating body 6 to melt and bond the welded portion 5f and the welded portions of the friction-resin parts 1 to 4 described above.

As another example, the method for joining resin parts according to the present invention is applied to, for example, production of a resin floor of an automobile when joining three or more resin parts together.
2A and 2B are explanatory views of a resin floor of an automobile, in which FIG. 2A is a state diagram before joining components, FIG. 2B is an explanatory view after joining, and FIG. 3 is an AA portion of FIG. FIG. 4 is an explanatory diagram showing an enlarged view of the joining portion.

  That is, as shown in FIG. 4, the resin resin floor 21 of the automobile includes a vibration resin component 24, a resin floor upper 23 that is one of two rubbed resin components to be superimposed, and the other resin floor underlayer. 22, which are assembled as a resin floor 21 as shown in FIG. 2B by being joined by the joining method according to the present invention.

  Then, at the joint portion where the three members are joined, as shown in FIG. 4, the projecting portion 23 y (projecting portion B) passes through the hole 22 h of the resin floor under 22 on the back surface of the resin floor upper 23. In addition, a vibration component 24 is brought into contact with the back surface of the resin floor under 22 sandwiching the hole 22h and is vibrated by the vibrating body 25 so that the tip end surface of the projecting portion 23y is caused by frictional heat. Is melted and vibration welded.

As another example, the resin component joining method according to the present invention is applied to, for example, production of a resin floor of an automobile. FIG. 5 is an explanatory view of a part of a resin floor of an automobile, and FIG.
That is, as shown in FIG. 6, a part of the resin floor of the automobile includes a vibration resin part 24, a resin floor upper part 23 that is one side of two rubbed resin parts to be superimposed, and the other part. The resin floor under-part 22 is composed of three parts. By providing a burr relief groove 26 and a burr relief gap 27, vibration welding is performed with high dimensional accuracy without being affected by burr during vibration welding.

As another example, the resin component joining method according to the present invention is applied to, for example, production of a floor of an automobile. FIG. 7 is an explanatory view of a part of a resin floor of an automobile.
That is, it is composed of three parts: a vibration resin part 24, a resin floor upper 23 which is a resin part on one side of two resin parts to be superimposed, and a resin floor under 22 on the other side. By adding positioning ribs 28 that match the holes 23h of the resin floor upper 23 to the floor under component 22 in the vibration direction, only the resin floor under 22 is fixed without fixing the resin upper floor 23 during vibration welding. Vibration welding and joining.

Next, each element constituting the present invention will be described.
The vibration welding used for obtaining the resin component bonded structure of the present invention is generated between two members by periodically vibrating two members (resin components, etc.) in contact with each other under pressure. This is a method in which a resin is melted and joined by frictional heat, and can be performed using a known vibration welding machine.
In the present invention, a resin part that is vibrated by a vibrating body is called a “vibrated resin part”, and a member that is fixed and receives friction by the vibration resin part is called a “rubbed resin part”.

  In the resin part bonded structure according to the present invention, the vibration resin part and the welded part of the two or more rubbed resin parts are brought into contact with each other and vibration welded, so that these three or more resin parts become the vibration resin. The welded part of the part and the welded surface A formed by the welded parts of the two or more rubbed resin parts are integrally joined.

  And in the resin component joining structure of this invention, the area of the welding part of this vibration resin part is equal to the sum total of the area of the welding part of two or more this friction resin parts. “Equal areas” here does not mean that they are geometrically completely the same area, but there are slight dimensional differences that take into account errors and differences in the thermal expansion of the materials in each resin part. In some cases, the area is almost the same. The “substantially the same area” is preferably such that the area of the welded part of the vibration resin part is 80 to 120% with respect to the total area of the welded parts of the two or more rubbed resin parts. 90 to 110% is more preferable.

  In the resin part bonded structure according to the present invention, one of the rubbed resin parts (first rubbed resin part; for example, 1 in FIG. 1, 23 in FIG. 4, 22 in FIG. 6) A part of the welding surface A is formed with the tip end surface of the projecting portion B as a welding portion, and other friction-resistant resin parts (second friction-resistant resin parts; for example, 2 in FIG. 1 and FIG. 4 22, 23) in FIG. 6 has a hole portion into which the protruding portion B of the first rubbed resin part is inserted, and the outer edge portion of the hole portion is used as a welding portion. A part is formed.

  Alternatively, in the resin component joint structure of the present invention, in addition to the first and second friction resin components, one or more other friction resin components having holes (third friction resin components). For example, 3 and 4 in FIG. 1, and the outer edge portions of the holes are arranged as welded portions so as to form an annual ring shape with respect to the welded portions of the first and second rubbed resin parts. A part of the welding surface A is formed. In this case, the welded part has an annual ring shape. Each resin part is in order from the inner side, the first rubbed resin part, the second rubbed resin part, and the third rubbed resin part, and the respective holes and protrusions. In this state, the welding surface is formed and welded in a state of being nested, and each welding portion is concentric. Even if it is called an annual ring shape, the welded part and the hole part of each resin part are not necessarily circular, and are not necessarily similar to each other.

  In the resin component joint structure of the present invention, at least one of the second rubbed resin component and the third rubbed resin component has a protruding portion, and the hole portion is the protruding portion. It is preferable that the projecting portion has a cylindrical shape, all have a projecting portion, and the hole portion is on the distal end surface of the projecting portion, and the projecting portion is More preferably, it is cylindrical. Note that the cylindrical shape in this case is not limited to the cylindrical shape, and may be various such as a rectangular tube shape.

  In the resin part bonded structure according to the present invention, the first friction resin part is held, and the second friction resin part and the third friction resin part are positioned with respect to the first friction resin part. Preferably, positioning means (for example, 28 positioning ribs in FIG. 7) are provided.

  In the resin part joint structure of the present invention, a burr relief groove (for example, 26 in FIG. 6) is provided inside the second friction resin part, and the first friction resin part, the second friction resin part, It is also preferable to provide at least one burr relief gap (for example, 27 in FIG. 6) between the respective welded portions of the three rubbed resin parts.

  In the resin part bonded structure of the present invention, it is preferable that at least one of the first rubbed resin part, the second rubbed resin part, and the third rubbed resin part has a hat shape (for example, FIG. 5-7).

  Resin parts such as vibration resin parts, first rubbed resin parts, second rubbed resin parts, and third rubbed resin parts used in the resin part joint structure of the present invention are a matrix (component) such as resin. What formed the fiber reinforced composite material in which the reinforced fiber was added to is preferable.

  As the fiber reinforced composite material used in the present invention, a fiber reinforced composite material in which a fiber reinforced composite material portion and a resin-only portion are laminated or a fiber reinforced composite material having a sandwich structure is also preferable. In the case of the sandwich structure, the core member may be a fiber reinforced composite material and the skin member may be a resin, and conversely, the core member may be a resin-only portion and the skin member may be a fiber reinforced composite material. good.

  The fiber reinforced composite material used in the present invention preferably includes a random mat fiber, that is, a material in which a reinforcing fiber is laminated on a random mat, and the random mat fiber is impregnated with a thermoplastic resin. Those are preferred.

  As the matrix of the fiber-reinforced composite material used in the present invention, a thermoplastic resin is preferable from the viewpoint of excellent moldability, productivity, and processability. Moreover, by using a thermoplastic resin as the matrix of the vehicle body, it is possible to increase the breaking strain when pulled in the axial direction located between the two axes to about 20%. Examples of the thermoplastic resin include vinyl chloride resin, vinylidene chloride resin, vinyl acetate resin, polyvinyl alcohol resin, polystyrene resin, acrylonitrile-styrene resin (AS resin), acrylonitrile-butadiene-styrene resin (ABS resin), acrylic resin, and methacrylic resin. Resin, polyethylene resin, polypropylene resin, polyamide 6 resin, polyamide 11 resin, polyamide 12 resin, polyamide 46 resin, polyamide 66 resin, polyamide 610 resin, polyacetal resin, polycarbonate resin, polyethylene terephthalate resin, polyethylene naphthalate resin, boribylene terephthalate Resin, polyarylate resin, polyphenylene ether resin, polyphenylene sulfide resin, polysulfone resin, polyethersulfone Fat, polyether ether ketone resin, and as one or more are preferably selected from the group consisting of a these resins two or more compositions and the like. Among these, vinyl chloride resin, polystyrene resin, ABS resin, polyethylene resin, polypropylene resin, polyamide 6 resin, polyamide 66 resin, polyacetal resin, polycarbonate resin, polyethylene terephthalate resin, polyethylene naphthalate resin, boribylene terephthalate resin, polyarylate resin And more preferably one or more selected from the group consisting of two or more of these resins and the like, and particularly preferred are polypropylene resin, polyamide 6 resin, polyamide 66 resin and compositions of two or more of these resins. One or more types selected from the group consisting of and the like are particularly preferable.

  Further, the reinforcing fibers contained in the fiber reinforced composite material used in the present invention include glass fibers, carbon fibers, aramid fibers, boron fibers, alumina fibers, silicon carbide fibers, high density polyethylene fibers, and PBO (polybenzoxazole). One or more selected from the group consisting of fibers and a mixture of two or more of these can be mentioned, and among these, carbon fibers are preferred because they are lightweight and have excellent strength. Known carbon fibers can be used, but carbon fiber bundles arranged in one direction, so-called unidirectional carbon fibers, or carbon fibers laminated on a random mat are preferable. Of course, a plurality of types of carbon fibers may be used.

  The fiber reinforced composite material used in the present invention includes components other than the matrix (resin) and the reinforcing fibers (fillers that are not fibrous, various additives such as an antioxidant), and the like. It may be included as long as it does not interfere with the purpose.

  The resin component bonded structure of the present invention can be used in a wide range of applications such as aerospace, transportation machinery, electrical / electronic equipment, machine / industry / general / precision machinery, and is particularly suitable for automotive parts, particularly automotive floors.

1, 2, 3, 4... Friction resin part 1h, 2h, 3h, 4h, 22h, 23h... Hole 1y, 2y, 3y. 5 f of welding resin parts 5, 24 ... vibration resin parts 6, 25... Vibrators 11 s, 12 s, 13 s, 27... Floor 22 Resin floor under
23 Resin floor upper
26 Burr relief groove 28 Positioning rib 100 Welding surface A

Claims (7)

When the welded parts of two or more rubbed resin parts are brought into contact with the vibration-exposed resin parts to which vibration is applied and vibration welded, these three or more resin parts are connected to the welded parts of the vibratory resin parts. In the resin part joint structure integrally joined via the welding surface A formed by the welded parts of the two or more rubbed resin parts, the area of the welded part of the vibration resin part has two or more It is equal to the total area of the welded parts of the friction resin parts,
One of the rubbed resin parts (first rubbed resin part) has a projecting portion B, and a part of the welding surface A is formed with the tip surface of the projecting portion B as a welding portion. The rubbed resin component (second rubbed resin component) has a hole portion into which the protruding portion B of the first rubbed resin component is inserted, and the outer edge portion of the hole portion is used as a welding portion. Whether a part of the welding surface A is formed,
Alternatively, there is one or more other rubbed resin parts (third rubbed resin parts) having holes, and the outer edges of these holes are welded parts, and the first and second A resin part joining structure, wherein the resin part joining structure is arranged so as to have an annual ring shape with respect to a welded part of a friction-resin part, and a part of the welding surface A is formed.   At least one of the second rubbed resin component and the third rubbed resin component has a projecting portion, and the hole portion is on the front end surface of the projecting portion. The resin component joint structure according to claim 1, wherein the resin component has a cylindrical shape.   Positioning means for holding the first rubbed resin component and positioning the second rubbed resin component and the third rubbed resin component with respect to the first rubbed resin component is provided. The resin component joint structure according to claim 1 or 2.   A burr relief groove is provided on the inner side of the second rubbed resin component, and at least one burr between the welded portions of the first rubbed resin component, the second rubbed resin component, and the third rubbed resin component. The resin part joint structure according to any one of claims 1 to 3, wherein a clearance gap is provided.   5. The resin part bonded structure according to claim 1, wherein at least one of the first rubbed resin part, the second rubbed resin part, and the third rubbed resin part has a hat shape. .   6. The fiber reinforced resin material molded body including random mat fibers is at least one of the first rubbed resin part, the second rubbed resin part, and the third rubbed resin part. The resin component joining structure according to claim 1.   The floor for motor vehicles containing at least 1 resin component joining structure in any one of Claims 1-6.

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