JP7180553B2 - Vibration welding equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vibration welding apparatus, and more particularly, an upper die and a lower die hold two parts while pressing them against each other, and the upper die is vibrated in the vibration direction to bring the two parts into contact with each other. The present invention relates to a vibration welding apparatus that generates frictional heat on surfaces to weld two parts.

As a conventional vibration welding apparatus, for example, as shown in FIG. A generally known vibration welding apparatus 101 welds the two parts 104a and 104b by generating frictional heat on the contact surfaces of the two parts 104a and 104b. The upper mold 102 includes an upper mold base member 107 and an upper mold main body 109 detachably attached to the lower surface side of the upper mold base member 107 with a plurality of bolts 108 . When the upper mold main body 109 is attached to and detached from the upper mold base member 107 (that is, when changing the setup of the upper mold 102), the bolts 108 at 12 locations in total, 6 on the front surface and 6 on the back surface, are removed. A person uses a torque wrench to tighten and loosen the work for about 220 seconds.

JP 2012-183571 A JP 2009-039988 A Japanese Patent Application Laid-Open No. 2018-130930 JP 2003-097519 A

However, in the above conventional vibration welding apparatus 101, in order to remove the upper die body 109 from the upper die base member 107, it is necessary to remove all twelve bolts 108, and the upper die body 109 is attached to the upper die base member 107. For installation, all removed bolts 108 must be reinstalled. As a result, the work time for changing the setup of the upper mold 102 is lengthened, leading to a decrease in productivity. In addition, a torque wrench is used to attach and detach the bolt 108, but the work of turning the bolt 108 many times is troublesome because the space is narrow due to the receiving block and the like. Furthermore, in order to prevent the upper die main body 109 from falling, it is necessary to guarantee the bolt tightening load by the torque wrench.

It is conceivable to remove the bolts 108 and attach the upper mold body 109 detachably to the upper mold base member 107 using a plurality of hydraulic clamping devices. Regulations limit the number and size of hydraulic clamping devices that can be used.

Here, Patent Documents 1 to 3 above disclose techniques for shortening the mold replacement time in the vibration welding apparatus. However, the techniques disclosed in Patent Documents 1 to 3 increase the size of the entire device. Further, the above Patent Document 4 discloses that positioning is provided in a pallet clamp by a general work pallet or a clamping device for easily exchanging dies. However, Patent Document 4 does not disclose its position or structure, nor does it disclose an effective technique that can be applied to the upper mold of the vibration welding apparatus.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vibration welding apparatus capable of greatly shortening the work time for changeover of upper molds subject to weight restrictions.

In order to solve the above-mentioned problem, the invention according to claim 1 presses two parts held by an upper die and a lower die to bring them into contact with each other while vibrating the upper die in a vibrating direction. A vibration welding apparatus for welding the two parts by generating frictional heat on the contact surfaces of the two parts, wherein the upper mold is attached to and detached from the lower surface side of the upper mold base member and the upper mold base member. an upper die body to be removably mounted, wherein a plurality of hydraulic clamping devices are provided on the outer peripheral portion of the upper die base member, and the upper die body is provided with the plurality of hydraulic clamping devices. A receiving portion that can be clamped by the fluid pressure clamping device is provided at a position facing each of them. A first positioning pin that can be inserted into the lowered first insertion hole is provided. The gist is that a second positioning pin that can be inserted into the second insertion hole is provided.
The invention according to claim 2 is based on the invention according to claim 1, wherein the first positioning pin has a tapered portion that decreases in diameter toward the tip, and the tapered portion is inserted into the first insertion hole. The gist of the invention is to provide a tapered hole that is possible.
According to a third aspect of the invention, in the second aspect of the invention, the second positioning pin has an expanding/contracting portion that can be expanded and contracted in the second insertion hole.
The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the first positioning pin and the second positioning pin are arranged to face each other in the vibration direction of the upper die. The gist of it is that

According to the vibration welding apparatus of the present invention, the upper mold includes the upper mold base member and the upper mold main body detachably attached to the lower surface of the upper mold base member. is provided with a plurality of fluid pressure clamping devices, and the upper die body is provided with receiving portions that can be clamped by the fluid pressure clamping devices at positions facing each of the plurality of fluid pressure clamping devices. A first positioning pin that can be inserted into a first insertion hole formed in the upper die main body is provided at one end of the upper die base member in the vibration direction of the upper die. A second positioning pin that can be inserted into a second insertion hole drilled in the upper die body is provided on the other end side of the outer peripheral portion of the member in the vibration direction of the upper die. Accordingly, when the upper mold is changed, the fluid pressure clamping devices clamp the receiving portions, and the first and second positioning pins are inserted into the insertion holes, thereby allowing the upper mold base member to be clamped. The upper mold body is firmly attached. Therefore, conventional bolt tightening and loosening work can be eliminated, and the setup change work time for the upper die can be greatly shortened. In addition, human error in bolt tightening load security can be eliminated. Furthermore, by adopting the first and second positioning pins, the number of fluid pressure clamp devices to be used can be reduced and/or the size thereof can be reduced, so that the upper die having weight restrictions can be suitably used.
Further, when the first positioning pin has a tapered portion whose diameter decreases toward the tip, and the first insertion hole has a tapered hole into which the tapered portion can be inserted, the tapered portion is wedged into the tapered hole. Since the upper mold body is effectively inserted, the upper mold main body is attached more firmly to the upper mold base member.
Furthermore, when the second positioning pin has an expanding/contracting portion that can be expanded and contracted in the second insertion hole, the second positioning pin smoothly fits into each insertion hole together with the tapered first positioning pin. inserted.
Furthermore, when the first positioning pin and the second positioning pin are arranged to face each other in the vibrating direction of the upper mold, the upper mold main body is more firmly attached to the upper mold base member.

The present invention will be further described in the following detailed description by way of non-limiting examples of exemplary embodiments according to the invention and with reference to the mentioned drawings, wherein like reference numerals indicate Similar parts are shown throughout the several figures.
1 is a front view of a vibration welding device according to an example; FIG. FIG. 4 is a vertical cross-sectional view of an upper mold that constitutes the vibration welding device; FIG. 4 is a bottom view of an upper mold base member that constitutes the upper mold; FIG. 4 is a top view of an upper mold main body that constitutes the upper mold; FIG. 4 is an explanatory diagram for explaining the hydraulic clamping device according to the embodiment, (a) showing a state in which the upper mold body is separated from the upper mold base member, and (b) showing the hydraulic clamping device on the left side of the center line. , and the right side of the center line shows the clamped state of the hydraulic clamping device. FIG. 4A is an explanatory diagram for explaining the first positioning pin according to the embodiment, where (a) shows a state in which the upper mold main body is separated from the upper mold base member, and (b) shows the first positioning pin positioned at the first position; The state inserted in the insertion hole is shown. FIG. 4 is an explanatory diagram for explaining the second positioning pin according to the embodiment, (a) showing a state in which the upper mold body is separated from the upper mold base member, and (b) showing the second positioning pin on the left side of the center line. The expanded/contracted portion of the positioning pin is shown with its diameter reduced within the second insertion hole, and the right side of the center line shows the expanded/contracted portion of the second positioning pin with its diameter expanded within the second insertion hole. 1 is a front view of a conventional vibration welding device; FIG.

The material presented herein is intended to be illustrative and illustrative of the embodiments of the invention and is believed to be the most effective and readily understood description of the principles and conceptual features of the invention. It is stated for the purpose of providing what it seems. In this regard, no attempt is made to show structural details of the invention beyond those necessary for a fundamental understanding of the invention, and the description in conjunction with the drawings will illustrate some aspects of the invention. It will be clear to those skilled in the art how it is actually implemented.

<Vibration welding device>
For example, as shown in FIGS. 1 and 2, the vibration welding apparatus according to the present embodiment presses two parts (4a, 4b) held respectively by an upper mold (2) and a lower mold (3). A vibration welding apparatus (1) for welding two parts by causing frictional heat to be generated on the contact surfaces of the two parts by vibrating the upper die (2) in the vibration direction (P). The mold (2) includes an upper mold base member (7) and an upper mold main body (9) detachably attached to the lower surface side of the upper mold base member (7). For example, as shown in FIGS. 3 and 4, a plurality of fluid pressure clamping devices (11) are provided on the outer periphery of the upper die base member (7), and the upper die body (9) has At a position facing each of the plurality of fluid pressure clamping devices (11), a receiving portion (12) capable of clamping the fluid pressure clamping device is provided. A first positioning pin (21) that can be inserted into a first insertion hole (23) drilled in the upper mold body (9) is provided on one end side of the vibration direction (P) of the upper mold base. A second positioning pin ( 32) are provided.

As a vibration welding device according to this embodiment, for example, as shown in FIG. ) has a tapered hole (24) into which the tapered portion (22) can be inserted.

As a vibration welding device according to this embodiment, for example, as shown in FIG. A form comprising This expansion/contraction part (34) can be expanded/contracted manually, for example.

As a vibration welding device according to this embodiment, for example, as shown in FIG. The form that is done is mentioned.

It should be noted that the reference numerals in parentheses for each configuration described in the above embodiment indicate the corresponding relationship with the specific configuration described in the examples described later.

Hereinafter, the present invention will be specifically described by way of examples with reference to the drawings.

(1) Configuration of Vibration Welding Apparatus As shown in FIG. 1, the vibration welding apparatus 1 according to the present embodiment has two parts 4a and 4b held by an upper die 2 and a lower die 3, respectively, which are brought into contact while being pressed. By vibrating the upper die 2 in the vibration direction P, frictional heat is generated by the vibration on the contact surfaces of the two parts 4a and 4b, thereby welding the two parts 4a and 4b. This vibration welding apparatus 1 includes a vibration plate 5 for vibrating the upper die 2 in the vibration direction P. As shown in FIG.

The upper mold 2 includes an upper mold base member 7 and an upper mold main body 9 detachably attached to the lower surface side of the upper mold base member 7 . The upper mold base member 7 is fixedly held by the vibrating plate 5 . A holding portion 9a for holding the component 4a is provided on the lower surface side of the upper mold body 9. As shown in FIG.

As shown in FIGS. 2 and 3, a plurality of (six in FIG. 3) hydraulic clamping devices 11 are provided on the lower surface side of the outer peripheral portion of the upper die base member 7 . As shown in FIGS. 2 and 4, the upper mold body 9 is provided with a ring-shaped receiving portion 12 at a position opposed to each hydraulic clamp device 11 to which the hydraulic clamp device 11 can be clamped.

As shown in FIG. 5, the hydraulic clamping device 11 includes an insertion portion 14 that can be inserted into the receiving portion 12. As shown in FIG. A ball body 15 is provided on the outer peripheral side of the insertion portion 14 so as to engage with the receiving portion 12 when pressed toward the centrifugal side by hydraulic pressure. Specifically, the hydraulic clamping device 11 includes a cover body 17 attached so as to cover a recess 16 formed on the lower surface side of the upper mold base member 7 , and a cover body 17 attached to cover the recess 16 formed in the lower surface of the upper mold base member 7 . It has a piston rod 18 provided movably in the thickness direction) and a spring body 19 that biases the piston rod 18 upward. The cover body 17 is provided with an insertion portion 14 that can be inserted into the receiving portion 12 . A horizontal hole 14 a in which the ball body 15 is arranged is formed on the outer peripheral side of the insertion portion 14 . The lateral hole 14a is formed in a shape that prevents the ball 15 from slipping out toward the centrifugal side. A pressing surface 18a is formed on the outer peripheral side of the lower portion of the piston rod 18 so as to be able to press the ball body 15 toward the centrifugal side.

The number of recesses 16 (10 in FIG. 3) is greater than the number of hydraulic clamping devices 11 used (6 in FIG. 3). The arrangement form of the hydraulic clamping device 11 can be changed by pressing.

According to the hydraulic clamp device 11, as shown in FIG. 5(b), the oil in the hydraulic chamber 16a on the bottom side of the concave portion 16 is released while the insertion portion 14 is inserted into the receiving portion 12. , the piston rod 18 is lifted by the biasing force of the spring body 19 . At this time, the ball body 15 is pressed toward the centrifugal side by the pressing surface 18 a and engages with the receiving portion 16 . On the other hand, by supplying oil into the hydraulic chamber 16a on the bottom side of the recess 16 while the ball body 15 is engaged with the receiving portion 12, the piston rod 18 is lowered against the biasing force of the spring body 19. be. At this time, the ball body 15 is released from the pressing surface 18a, and the engagement between the ball body 15 and the receiving portion 12 is released.

As shown in FIGS. 2 and 3, a first positioning pin 21 is provided on the lower surface side of the outer peripheral portion of the upper die base member 7 on one end side in the vibration direction P of the upper die 2 . The first positioning pin 21 has a tapered portion 22 whose diameter decreases toward the tip (see FIG. 6). 2 and 4, a first insertion hole 23 into which the first positioning pin 21 can be inserted is formed in the upper surface side of the upper die main body 9 at a position facing the first positioning pin 21. As shown in FIGS. ing. The first insertion hole 23 has a tapered hole 24 into which the tapered portion 22 can be inserted (see FIG. 6).

As shown in FIGS. 2 and 3 , a second positioning pin 32 is provided on the lower surface side of the outer peripheral portion of the upper die base member 7 on the other end side of the vibration direction P of the upper die 2 . The second positioning pin 32 is arranged to face the first positioning pin 21 in the vibration direction P of the upper die 2 . As shown in FIGS. 2 and 4, a second insertion hole 33 into which the second positioning pin 32 can be inserted is formed on the upper surface side of the upper die main body 9 at a position facing the second positioning pin 32 . ing.

As shown in FIG. 7, the second positioning pin 32 has an expanding/contracting portion 34 that can be expanded and contracted within the second insertion hole 33 . Specifically, the second positioning pin 32 includes a cylinder 37 screwed into a recess 35 formed in the lower surface of the upper die base member 7 and a movable shaft 38 screwed into the inner circumference of the cylinder 37 . and have. A tapered surface 37a whose diameter decreases downward is formed on the lower outer peripheral side of the cylindrical body 37. As shown in FIG. A ring-shaped expanding/contracting portion 34 is arranged on the outer peripheral side of the tapered surface 37a. A tool recess 40 is formed on the lower end surface of the movable shaft 38 to which a tool (not shown) can be attached.

According to the second positioning pin 32, as shown in FIG. 7(b), the movable shaft body 38 is rotated with a tool in a state in which the diameter-reduced expansion/contraction portion 34 is inserted into the second insertion hole 33, thereby expanding/contracting it. By lifting together with the portion 34 , the expanded/contracted portion 34 is pushed toward the centrifugal side by the tapered surface 37 a and engaged with the second insertion hole 33 . On the other hand, in a state in which the expanding/contracting portion 34 whose diameter has been expanded is engaged with the second insertion hole 33, the movable shaft 38 is rotated by a tool to be lowered together with the expanding/contracting portion 34, so that the expanding/contracting portion 34 is pressed by the tapered surface 37a. It is released, and the engagement between the expanding/contracting portion 34 and the second insertion hole 33 is released.

The lower mold 3 includes a lower mold base member 43 and a lower mold main body 44 detachably attached to the upper surface side of the lower mold base member 43, as shown in FIG. A holding portion 44a for holding the component 4b is provided on the upper surface side of the lower die main body 44. As shown in FIG. The lower die 3 is provided so as to be vertically movable by a moving mechanism (not shown).

(2) Operation of the vibration welding apparatus Next, the operation of the vibration welding apparatus 1 having the above configuration at the time of changeover of the upper die 2 will be described. As shown in FIG. 2, with the upper die main body 9 supported from below by the support member 49 provided in the lower die 3, the enlarged/reduced portion 34 of the second positioning pin 32 is reduced in diameter to form the second insertion hole 33. As shown in FIG. are released, and the clamping of the receiving portions 12 by the hydraulic clamping devices 11 is released. By lowering the lower die 3 from this state, the insertion portion 14 of each hydraulic clamp device 11 is extracted from each receiving portion 12, and the first and second positioning pins 21 and 32 are inserted into the respective insertion holes 23 and 33. , and the upper mold main body 9 is removed from the upper mold base member 7 . After that, the upper mold main body 9 supported by the support member 49 of the lower mold 3 is replaced with a new upper mold main body 9 .

Next, by raising the lower mold 3 , the upper mold body 9 supported by the support member 30 is brought closer to the upper mold base member 7 . When the upper mold main body 9 is arranged at the mounting position S with respect to the upper mold base member 7, the insertion portions 14 of the hydraulic clamp devices 11 are inserted into the receiving portions 12, and the first and second positioning pins 21 are inserted into the receiving portions 12. , 32 are inserted into the respective insertion holes 23 , 33 . At this time, the tapered portion 22 of the first positioning pin 21 is fitted into the tapered hole 24 of the first insertion hole 23 by wedge effect. Next, the enlarging/reducing portion 34 of the second positioning pin 32 is enlarged in diameter and engaged with the second insertion hole 33 , and the receiving portion 12 is clamped by each hydraulic clamping device 11 , thereby clamping the upper die base member 7 . An upper mold body 9 is attached.

(3) Effects of the Embodiment According to the vibration welding apparatus 1 of the present embodiment, the upper mold 3 includes the upper mold base member 7 and the upper mold main body 9 detachably attached to the lower surface side of the upper mold base member 7. A plurality of hydraulic clamping devices 11 are provided on the outer peripheral portion of the upper die base member 7, and the upper die main body 9 is provided with the fluid at a position facing each of the plurality of hydraulic clamping devices 11. A receiving portion 12 is provided on which a pressure clamping device 11 can be clamped. A first positioning pin 21 that can be inserted into a first insertion hole 23 drilled in the upper mold main body 9 is provided on one end side of the upper mold vibration direction P of the outer peripheral portion of the upper mold base member 7 . A second positioning pin 32 that can be inserted into a second insertion hole 33 drilled in the upper die main body 9 is provided on the other end side of the outer periphery of the upper die base member 7 in the vibration direction P of the upper die. ing. As a result, each hydraulic clamp device 11 clamps the receiving portion 12 and the first and second positioning pins 21 and 32 are inserted into the respective insertion holes 23 and 33 when the upper die 2 is changed. , the upper mold main body 9 is firmly attached to the upper mold base member 7 . As a result, conventional bolt tightening and loosening operations can be eliminated, and the work time for changing the setup of the upper die 2 can be greatly shortened. In addition, human error in bolt tightening load security can be eliminated. Furthermore, by adopting the first and second positioning pins 21 and 32, the number of hydraulic clamping devices 11 to be used can be reduced and/or the size can be reduced. Used.

Further, in this embodiment, the first positioning pin 21 has a tapered portion 22 whose diameter decreases toward the tip, and the first insertion hole 23 has a tapered hole 24 into which the tapered portion 22 can be inserted. As a result, the tapered portion 22 is fitted into the tapered hole 24 by a wedge effect, so that the upper mold body 9 is attached to the upper mold base member 7 more firmly.

Furthermore, in this embodiment, the second positioning pin 32 has an expanding/reducing portion 34 that can be expanded and contracted inside the second insertion hole 33 . Thereby, the tapered first positioning pin 21 and the second positioning pin 32 are smoothly inserted into the respective insertion holes 23 , 33 .

Furthermore, in this embodiment, the first positioning pin 21 and the second positioning pin 32 are arranged to face each other in the vibration direction P of the upper die. As a result, the upper mold main body 9 is attached to the upper mold base member 7 more firmly.

It should be noted that the present invention is not limited to the above-described examples, and may be variously modified examples within the scope of the present invention according to the purpose and application. That is, in the above embodiment, the hydraulically operated clamping device 11 was exemplified, but the present invention is not limited to this, and for example, the pneumatically operated clamping device 11 may be used.

Further, in the above-described embodiment, the combination of the first positioning pin 21 having the tapered portion 22 and the second positioning pin 32 having the expanding/contracting portion 34 was exemplified. A combination of the first positioning pin 21 and the second positioning pin 32 having the expansion/contraction portion 34 may be used.

Furthermore, in the above embodiment, the expandable/contractible portion 34 that is manually expanded/contracted was illustrated, but the present invention is not limited to this, and the expandable/contractible portion 34 may be expanded/contracted by fluid pressure, for example.

The foregoing examples are for illustrative purposes only and are not to be construed as limiting the invention. While the present invention has been described by way of examples of exemplary embodiments, it is understood that the words used in describing and illustrating the invention are words of description and illustration, rather than words of limitation. Changes may be made within the scope of the appended claims without departing from the scope or spirit of the invention in its form, as detailed herein. Although reference has been made herein to specific structures, materials and embodiments in describing the invention, it is not intended that the invention be limited to the disclosure herein, but rather the invention as set forth in the appended claims. It covers all functionally equivalent structures, methods and uses within its scope.

The present invention is not limited to the embodiments detailed above, and various modifications and changes are possible within the scope of the claims of the present invention.

INDUSTRIAL APPLICABILITY The present invention is widely used as a technique for attaching and detaching an upper mold body to and from an upper mold base member that constitutes a vibration welding apparatus.

1; vibration welding device 2; upper mold 3; lower mold 4a, 4b; parts 7; upper mold base member 9; upper mold main body 11; Tapered portion 23; First insertion hole 24; Tapered hole 32; Second positioning pin 33; Second insertion hole 34;

Claims (4)

The two parts held by the upper die and the lower die are brought into contact with each other while being pressurized, and the upper die is vibrated in the vibration direction to generate frictional heat on the contact surfaces of the two parts. A vibration welding device for welding the
The upper mold includes an upper mold base member and an upper mold main body detachably attached to the lower surface side of the upper mold base member,
A plurality of fluid pressure clamp devices are provided on the outer peripheral portion of the upper mold base member,
The upper die main body is provided with a receiving portion that can be clamped by the fluid pressure clamp device at a position facing each of the plurality of fluid pressure clamp devices,
A first positioning pin that can be inserted into a first insertion hole formed in the upper mold main body is provided on one end side of the outer peripheral portion of the upper mold base member in the vibration direction of the upper mold,
A second positioning pin that can be inserted into a second insertion hole formed in the upper mold main body is provided on the other end side of the outer peripheral portion of the upper mold base member in the vibration direction of the upper mold. Characterized by vibration welding equipment. The first positioning pin has a tapered portion that decreases in diameter toward the tip,
2. The vibration welding device according to claim 1, wherein the first insertion hole has a tapered hole into which the tapered portion can be inserted. 3. The vibration welding device according to claim 2, wherein the second positioning pin has an expandable/contractible portion that can be expanded and contracted within the second insertion hole. The vibration welding device according to any one of claims 1 to 3, wherein the first positioning pin and the second positioning pin are arranged to face each other in the vibration direction of the upper die.

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