JP2009039988A - Vibration welding apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration welding apparatus which can be downsized and can rapidly and easily attach/detach an upper mold to/from a drive platen. <P>SOLUTION: The vibration welding apparatus 1 holds a plurality of work-pieces made of a synthetic resin by a lower mold 6 and an upper mold 8, and welds the mating surfaces of the workpiece by the heat generation due to friction by imparting the minute mechanical vibrations to the mating surfaces of the workpiece, and has the drive platen 4 which is fixed to the under surface of a vibrator head 3 and to which the upper mold is fixed. The vibration welding apparatus is equipped with: a suction mechanism 30 which sucks the upper mold 8 to the drive platen 4 by negative pressure; a first hydraulic clamp mechanism 30A which generates the clamp force directed toward the minute mechanical vibration direction in order to fix the upper mold to the drive platen 4; and a second hydraulic clamp mechanism 30B which generates the clamp force directed toward the direction orthogonal to the minute mechanical vibration direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vibration welding apparatus, and more particularly to a vibration welding apparatus in which an upper mold is strongly fixed to a drive platen fixed to a lower surface of a vibrator head via an adsorption mechanism.

  This vibration welding apparatus includes a bolster, a vibrator head, a drive platen fixed to the lower surface of the vibrator head, a vibration generating mechanism that vibrates the vibrator head in the horizontal direction, and a lift drive mechanism that drives the vibrator head up and down. The lower mold is detachably fixed to the bolster, and the upper mold is detachably fixed to the lower surface of the drive platen.

  Conventionally, when manufacturing a container-like or pipe-like synthetic resin part such as an intake manifold of an automobile engine in an automobile factory or the like, the upper half and the lower half of the synthetic resin part are molded in advance, and the upper half Set the body and lower half on the vibration welding device, hold the lower half on the lower mold, place the upper half on the lower half and bring their joint surfaces into contact with each other. While the upper die is engaged with the upper half from above and pressed downward, the vibrator head gives micro vibrations to the upper die and the upper half and generates heat due to friction to join the upper half and the lower half. To weld.

  Here, at the time of the above welding, for example, a minute vibration of 240 Hz is applied from the vibrator head to the upper mold, and at this time, an acceleration of about 300 G is applied to the upper mold, so the upper mold is firmly fixed to the drive platen. It is necessary to keep it. Even if a slight deviation occurs in the fixing between the upper mold and the drive platen, there is a possibility that a joining error may occur or that the vibration welding apparatus breaks down, resulting in a serious accident. In general, a fixing mechanism for fixing the upper mold to the drive platen with a large number of bolts is employed. Under a mixed-flow production system for various products, it is necessary to frequently exchange the lower and upper molds according to changes in workpieces to be joined. It is important to be able to change the die quickly in as little as 1 second.

In the vibration welding apparatus of Patent Document 1, in order to fix the upper mold to the drive platen, a plurality of cone bodies are fixed to the lower surface of the drive platen with bolts, and a plurality of conical holes corresponding to the plurality of cone bodies are formed on the upper mold. The upper die is fixed to the drive platen with a large number of bolts in a state where the upper die is precisely positioned by fitting the plurality of cones of the drive platen into the plurality of conical holes of the upper die. It is configured.
JP-A-11-277631

  However, in the vibration welding apparatus of Patent Document 1, as a member for fixing the upper mold to the drive platen, a plurality of cone bodies, a plurality of bolts for fixing these cone bodies to the drive platen, and the upper mold are fixed to the drive platen. Since a large number of bolts are used, the total weight of the members for fixing the upper molds of these bolts increases, so the load on the minute vibration generating means that generates minute vibrations increases and the vibration welding apparatus increases in size. .

  Since the upper mold is fixed to the drive platen with a large number of bolts, when replacing the upper mold, it is necessary to perform operations such as unfastening a large number of bolts, replacing the upper mold, and tightening a large number of bolts. The exchange takes a lot of labor and time, and the mold cannot be exchanged quickly.

  An object of the present invention is to provide a vibration welding apparatus that can be miniaturized and that allows an upper die to be quickly and easily attached to and detached from a drive platen.

  The vibration welding apparatus according to claim 1 is a vibration in which a plurality of workpieces made of a synthetic resin are held by a lower mold and an upper mold, a minute vibration is applied to a bonded surface of the workpiece, and the bonded surface of the workpiece is welded by heat generated by friction. A vibration welding apparatus, comprising: a drive platen that is fixed to a lower surface of a vibrator head and an upper mold is fixed; and a plurality of bolts that fix the drive platen to the vibrator head. And a first hydraulic clamping mechanism for generating a clamping force directed in a direction parallel to the minute vibration direction in order to fix the upper die to the drive platen. It is said.

  The drive platen is fixed to the lower surface of the vibrator head by a plurality of bolts, and the upper die is fixed to the drive platen by negative pressure by the suction mechanism, and is directed in a direction parallel to the direction of minute vibration generated by the first hydraulic clamping mechanism. The upper mold is fixed to the drive platen with the clamping force. When exchanging the upper mold, the upper mold can be quickly and easily attached and detached by releasing the suction mechanism and the first hydraulic clamping mechanism.

  According to a second aspect of the present invention, there is provided the vibration welding apparatus according to the first aspect, wherein the drive platen includes a main plate fixed in contact with a lower surface of a vibrator head, and the suction mechanism is provided near an outer periphery of the main plate. A closed loop seal member that seals the gap between the main plate and the outer periphery of the upper mold, a negative pressure chamber formed between the main plate and the upper mold inside the seal member, and the negative pressure chamber And a negative pressure introducing means for introducing a negative pressure into the main body.

  The vibration welding apparatus according to claim 3 is the invention according to claim 1 or 2, wherein the drive platen is formed integrally with the main plate at one end portion of the main plate in the minute vibration direction and protrudes downward, A receiving frame portion integrally formed with the main plate at the other end and projecting downward is provided. The first hydraulic clamping mechanism is mounted on the clamp frame portion in the direction of the minute vibration and is formed on the side portion of the upper mold. A plurality of piston members that can press the upper portion of the piston toward the receiving frame, a plurality of hydraulic chambers that respectively apply hydraulic pressure to the piston members, and a first hydraulic supply / discharge unit that can supply and discharge hydraulic pressure to the hydraulic chambers Means.

  According to a fourth aspect of the present invention, there is provided the vibration welding apparatus according to the first aspect, wherein a second hydraulic clamping mechanism for generating a clamping force directed in a direction orthogonal to the minute vibration direction in order to fix the upper die to the drive platen. It is characterized by providing.

  The vibration welding apparatus according to claim 5 is the invention according to claim 4, wherein the drive platen is formed integrally with the main plate at one end of the main plate in a direction orthogonal to the minute vibration direction and protrudes downward. A mounting portion; and a receiving portion that is integrally formed with the main plate at the other end of the main plate and protrudes downward and faces the one or more clamp mounting portions. A plurality of piston members that are mounted on the clamp mounting portion in a direction orthogonal to the micro-vibration direction and that can press the upper portion of the upper mold side toward the receiving portion, and a plurality of piston members that act on each of the piston members. And a second hydraulic pressure supply / discharge means capable of supplying and discharging hydraulic pressure to and from these hydraulic chambers.

  According to a sixth aspect of the present invention, there is provided the vibration welding apparatus according to any one of the first to fifth aspects, wherein the negative pressure chamber has a plurality of recesses formed on the main plate so as to face the negative pressure chamber. Yes.

  According to the first aspect of the present invention, in the vibration welding apparatus, an adsorption mechanism for adsorbing the upper die to the drive platen by negative pressure, and a clamp oriented in a direction parallel to the minute vibration direction to fix the upper die to the drive platen Since the first hydraulic clamping mechanism that generates force is provided, the upper die can be strongly adsorbed and fixed to the drive platen by the adsorption mechanism, and the first hydraulic clamping mechanism can be arranged in a direction parallel to the minute vibration direction. The upper mold can be fixed to the drive platen by generating the clamping force.

  An adsorption mechanism that adsorbs the upper mold to the drive platen with negative pressure is provided, and a first hydraulic clamping mechanism that fixes the upper mold to the drive platen with a clamping force that is parallel to the direction of minute vibration is provided. Since the mechanism for fixing the upper mold can be reduced in weight, the load on the minute vibration generating means for generating minute vibration can be reduced, and the vibration welding apparatus can be downsized.

  When replacing the upper mold, the upper mold can be fixed quickly and easily through a simple operation that simply releases the suction mechanism and the first hydraulic clamping mechanism. The upper mold can be quickly and easily fixed through a simple operation of operating the suction mechanism and the first clamp mechanism after setting.

  According to the second aspect of the present invention, the suction mechanism includes a negative pressure chamber formed between the main plate of the drive platen and the upper mold, a seal member for sealing the outer peripheral side of the negative pressure chamber, and a negative pressure chamber. Since the negative pressure introducing means for introducing the pressure is provided, the upper die can be strongly adsorbed because it can be adsorbed by applying a negative pressure to almost the entire upper surface of the upper die.

  According to the invention of claim 3, the main plate of the drive platen is provided with the clamp frame portion and the receiving frame portion, and the plurality of piston members and the plurality of hydraulic chambers of the first hydraulic clamp mechanism are provided in the clamp frame portion. In addition, since a strong clamping force can be generated by the first hydraulic clamping mechanism, the first hydraulic clamping mechanism, the clamp frame portion, and the receiving frame portion can be reduced in size and weight.

  According to the fourth aspect of the present invention, the second hydraulic clamping mechanism for generating the clamping force directed in the direction orthogonal to the minute vibration direction is provided to fix the upper die to the drive platen. It can also be strongly fixed in a direction orthogonal to the vibration direction.

  According to the invention of claim 5, one or a plurality of clamp mounting portions and receiving portions are provided on the main plate of the drive platen, and the plurality of piston members and the plurality of hydraulic chambers of the second hydraulic clamp mechanism are clamp mounted. Therefore, the second hydraulic clamp mechanism, the clamp mounting portion, and the receiving portion can be reduced in size and reduced in weight as much as possible.

  According to the invention of claim 6, since the negative pressure chamber has a plurality of recesses formed in the main plate so as to face the negative pressure chamber, the main plate, that is, the light weight of the drive platen is secured while ensuring the volume of the negative pressure chamber. Can be achieved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The vibration welding apparatus according to this embodiment is used in an automobile factory, for example, by holding a lower half body and an upper half body of an intake manifold made of thermoplastic synthetic resin by a lower mold and an upper mold, respectively. The joint surface of the half body is held in contact with the vibrator head, and a minute vibration is applied to the joint surface from the vibrator head via the drive platen and the upper mold, and the joint surface of the lower half body and the upper half body is generated by heat generated by friction. Are to be welded. Hereinafter, the lower half of the intake manifold will be described as a workpiece W1, and the upper half of the intake manifold will be described as a workpiece W2. The intake manifold is an example of a workpiece, and this vibration welding apparatus can be applied to joining various workpieces.

  As shown in FIG. 1, the vibration welding apparatus 1 includes a bolster 2, a vibrator head 3 that faces the bolster 2 from above, a drive platen 4 that is fixed to the lower surface of the vibrator head 3, and a bolster 2 that is fixed on the bolster 2. Lower die 6, upper die 8 fixed to the lower surface of the drive platen 4, a vibration generating mechanism (not shown) for applying minute horizontal vibrations to the vibrator head 3, and raising / lowering driving the vibrator head 3 up and down A drive mechanism (not shown), an adsorption mechanism 20 that adsorbs the upper mold 8 to the drive platen 4 by negative pressure, and first and second hydraulic clamping mechanisms 30A and 30B are provided. In the following description, the front, rear, left and right in FIGS.

  The vibration generating mechanism generates minute vibrations in the left-right direction and the horizontal direction in FIGS. 1 and 2 via a rotating shaft that is rotationally driven and an eccentric mechanism that is connected to the rotating shaft. The elevating drive mechanism includes a mechanism that moves up and down with a hydraulic cylinder or a mechanism that moves up and down via a crank mechanism with an electric motor.

  The workpiece W1 (lower half) is held by the lower die 6 made of aluminum alloy, and the workpiece W2 (upper half) is held by the upper die 8 made of aluminum alloy. When joining these workpieces W1, W2, The vibrator head 3 and the drive platen 4 are lowered, and the joining surfaces of the workpieces W1 and W2 are held in contact with each other, and minute vibrations are added in this state, and are joined in a fused state by frictional heat generated by the minute vibrations. Is done. The lower die 6 is detachably fixed to the bolster 2 by a plurality of hydraulic clamping devices (not shown), and the drive platen 4 is fixed to the vibrator head 3 by a plurality of bolts 11.

Next, the drive platen 4 will be described.
As shown in FIGS. 1 to 5, the drive platen 4 is a steel member that is substantially rectangular in plan view and is elongated in the minute vibration direction. The drive platen 4 includes a main plate 10 that is in contact with the lower surface of the vibrator head 3, and is fixed to the lower surface of the vibrator head 3 with 16 bolts 11.

  A clamp frame portion 12 to which the first hydraulic clamp mechanism 30A is mounted is integrally formed at the right end portion of the main plate 10 and protrudes downward. At the left end portion of the main plate 10, a receiving frame portion 13 for receiving the upper portion of the side portion of the upper mold 8 is integrally formed and protrudes downward. Two clamp mounting portions 14 to which the second hydraulic clamp mechanism 30B is mounted are integrally formed at the rear end portion of the main plate 10 and protrude downward. At the front end portion of the main plate 10, two receiving portions 15 for receiving the upper portions of the side portions of the upper mold 8 are integrally formed and protrude downward.

  On the lower surface portion of the main plate 10, eight rectangular recesses 16 are formed which are part of the negative pressure chamber 21 of the suction mechanism 20 and are arranged in two rows and four columns. Eight bolt holes 10a are formed in the front end portion and the rear end portion of the main plate 10 so as to penetrate vertically, and the main plate 10 is in contact with the lower surface of the vibrator head 3 in the above-described 16 pieces. The bolt 11 inserted through the bolt hole 10a is screwed into the bolt hole 3a of the vibrator head 3 to be firmly fixed (see FIG. 7).

Next, the suction mechanism 20 will be described.
As shown in FIGS. 3 to 6, the suction mechanism 20 includes a negative pressure chamber 21, a seal member 22, and a negative pressure introduction unit 23. The negative pressure chamber 21 is formed between the main plate 10 and the upper mold 8 on the inner side of the seal member 22, and the volume of the negative pressure chamber 21 is secured by the eight concave portions 16. The seal member 22 is provided in a portion near the outer periphery of the main plate 10 and has a closed loop shape that seals between the main plate 10 and the outer periphery of the upper die 8.

  As shown in FIGS. 3 to 6, the seal member 22 is similar to a large O-ring, and is disposed in a seal mounting groove 24 formed in the vicinity of the outer periphery of the main plate 10. It is fixedly held by a steel frame member 25 attached to 24. The frame member 25 for fixing the seal member 22 is screwed and fixed to the screw mounting hole 10b of the main plate 10 from below with a plurality of screws 26 (see FIG. 8).

  As shown in FIGS. 2 and 3, the negative pressure introducing means 23 has a vacuum pump installed outside the drive platen 4, and this vacuum pump is formed in the vacuum hose 27, the connection fitting 28 and the main plate 10. The negative pressure chamber 21 is connected to the negative pressure chamber 21 through the connection passage 29 so that negative pressure can be introduced into the negative pressure chamber 21.

Next, the first and second hydraulic clamping mechanisms 30A and 30B will be described.
As shown in FIGS. 2 to 6, the first hydraulic clamping mechanism 30 </ b> A generates a clamping force directed in a direction parallel to the minute vibration direction in order to fix the upper mold 8 to the drive platen 4. . The hydraulic clamp mechanism 30A is configured such that, for example, ten sets of hydraulic cylinders 31 mounted on the clamp frame portion 12 press the upper part of the side portion of the upper die 8 toward the receiving frame portion 13 so that the upper die 8 is driven to the drive platen. 4 is fixed.

  Each hydraulic cylinder 31 is formed between a piston member 33 movably mounted in the mounting hole 12 a of the clamp frame portion 12 in the left-right direction, and between the piston member 33 and the plug member 34, and applies hydraulic pressure to the piston member 33. The hydraulic chamber 35 is provided. The distal end portion of the rod portion 33a of the piston member 33 can protrude inward from the inner surface of the clamp frame portion 12, and the piston portion 33b of the piston member 33 is slidable on a ring 37 fitted in the mounting hole 12a. It is fitted inside. Three seal members 39a, 39b, and 39c are also provided. The ten sets of hydraulic chambers 35 are communicated with an annular oil passage 41 and a communication oil passage 42 formed through the clamp frame portion 12, and hydraulic supply / discharge means capable of supplying and discharging hydraulic pressure to and from the annular oil passage 41 and the communication oil passage 42. 44 is provided, and the hydraulic supply / discharge means 44 is connected to the communication oil passage 42 via a hydraulic hose 45 and a connection fitting 46 so that the hydraulic pressure can be supplied to and discharged from ten sets of hydraulic chambers 35. The ring 37 can be omitted.

  As shown in FIGS. 2 to 6, the second hydraulic clamping mechanism 30 </ b> B generates a clamping force directed in a direction orthogonal to the minute vibration direction in order to fix the upper mold 8 to the drive platen 4. is there. The second hydraulic clamp mechanism 30 </ b> B presses the upper part of the side of the upper die 8 toward the two receiving parts 15 by a total of four sets of hydraulic cylinders 31 mounted on the two clamp mounting parts 14. The mold 8 is fixed to the drive platen 4. Each clamp mounting portion 14 is provided with two sets of hydraulic cylinders 31, and each hydraulic cylinder 31 is configured similarly to the hydraulic cylinder 31. The hydraulic cylinder 31 includes a piston member that is mounted in the mounting hole of the clamp mounting portion 14 so as to be movable in the front-rear direction, and a hydraulic chamber that is formed between the piston member and the plug member and applies hydraulic pressure to the piston member. ing. The tip of the rod portion of the piston member can protrude inward from the inner surface of the clamp mounting portion 14.

  The two hydraulic chambers 35 of the two sets of hydraulic cylinders 31 of each clamp mounting portion 14 are communicated with each other through the annular oil passage 41 and the communication oil passage similar to the annular oil passage 41 and the communication oil passage 42. The communication oil passage 42 of the hydraulic clamp mechanism 30A is communicated with the hydraulic chambers of the four hydraulic cylinders 31 via the hydraulic pipes 47 and 48, and the hydraulic pressure can be supplied and discharged by the hydraulic supply / discharge means 44. An air vent valve 49 is connected to the communication oil passage of the clamp mounting portion 14. The hydraulic supply / discharge means 44 corresponds to first and second hydraulic supply / discharge means.

The operation and effect of the vibration welding apparatus 1 described above will be described.
The lower die 6 and the upper die 8 are carried in a closed state, the lower die 6 is fixed to the bolster 2 with a plurality of hydraulic clamping devices, and then the vibrator head 3 is moved up and down to fix the upper die 8 The upper surface of the upper die 8 is brought into contact with the main plate 10 of the drive platen 4 fixed to the vibrator head 3. Next, the negative pressure introducing means 23 is operated to introduce a negative pressure into the negative pressure chamber 21, and the upper die 8 is strongly adsorbed to the drive platen 4 by the negative pressure.

  Further, the hydraulic supply / discharge means 44 is operated to supply hydraulic pressure to the 14 hydraulic chambers 35 of the first and second hydraulic clamp mechanisms 30A, 30B via the hydraulic hose 45 and the hydraulic pipes 47, 48. Then, the upper part of the right end side surface of the upper die 8 is pressed toward the receiving frame portion 13 by the 10 sets of piston members 33 of the first hydraulic clamp mechanism 30A, and the 4 sets of pistons of the second hydraulic clamp mechanism 30B. Since the upper portion of the rear end side surface of the upper die 8 is pressed toward the receiving portion 15 by the member 33, the upper die 8 is strongly and quickly moved to the drive platen 4 by the first and second hydraulic clamp mechanisms 30A and 30B. Can be fixed to.

  Next, the vibrator head 3 is raised and a pair of workpieces W1 and W2 are carried between the lower mold 6 and the upper mold 8 with the joint surfaces in contact with each other. The vibrator head 3 is lowered, the workpieces W1 and W2 are fitted and held on the lower die 6 and the upper die 8, respectively, and the bonded surfaces of the workpieces W1 and W2 are brought into contact with each other in a pressurized state.

  When the vibration generating mechanism is driven and a minute vibration is applied to the vibrator head 3 for a predetermined time, the joint surface of the workpiece W2 held by the upper mold 8 is connected to the lower mold 6 via the drive platen 4 and the upper mold 8. The micro-vibration is relatively made relative to the joint surface of the workpiece W1 held on the surface. The joint surfaces of the workpieces W1 and W2 are welded by the frictional heat generated by the minute vibration. Thereafter, by lifting the vibrator head 3, it is possible to take out the joined workpiece.

  On the other hand, when the upper mold 8 is replaced, the negative pressure introducing means 23 is stopped in a state where the upper mold 8 is brought into contact with the lower mold 6 by the lifting drive mechanism, and the negative pressure chamber 21 is moved from the negative pressure introducing means 23 to the large size. Introduce atmospheric pressure. Thereafter, the clamped state is released by switching the hydraulic pressure of the 14 hydraulic chambers 35 to the drain pressure via the hydraulic supply / discharge means 44, and the upper die 8 is removed from the drive platen 4 by raising the vibrator head 3. be able to.

In this way, the negative pressure introduced into the negative pressure chamber 21 of the suction mechanism 20 by the negative pressure introduction means 23 is switched, or the hydraulic pressure supplied to the first and second hydraulic clamp mechanisms 30A, 30B from the hydraulic supply / discharge means 44. The upper die 8 can be fixed and released easily and quickly through a simple operation such as switching. Since the volume of the negative pressure chamber 21 is increased by forming the plurality of recesses 16 in the main plate 10, the capacity of the negative pressure adsorption force can be increased and the weight of the main plate 10 can be reduced.
Moreover, the upper die 8 is fixed to the drive platen 4 because the suction mechanism 20 for sucking the upper die 8 with negative pressure and the first and second hydraulic clamping mechanisms 30A and 30B that can be strongly clamped with hydraulic pressure are provided. Therefore, the mechanism can be reduced in size and weight, whereby the micro-vibration generating mechanism can be reduced in size and the manufacturing cost of the vibration welding apparatus 1 can be reduced.

Next, a modified example in which the above embodiment is partially modified will be described.
(1) As shown in FIG. 9, a disc spring 50 for returning the piston member 33 of the hydraulic cylinder mechanisms 30A, 30B may be incorporated.
(2) In order to easily arrange the upper die 8 on the drive platen 4, the outer peripheral portion of the upper end surface of the upper die 8 may be tapered or the outer peripheral portion of the pressing surface of the piston member 33 may be circularly tapered.
(3) The number of the hydraulic cylinder mechanisms 31 of the first and second hydraulic clamp mechanisms 30A and 30B may be increased or decreased as appropriate according to the size of the drive platen 4 and the upper mold 8.
(4) The present invention can be implemented in a form in which various modifications are added to the above-described embodiments without departing from the spirit of the present invention, and the present invention includes those modifications.

It is a principal part front view of the vibration welding apparatus which concerns on this invention. It is a top view of a drive platen. It is a back view of a drive platen. It is a front view of a drive platen. It is sectional drawing of a drive platen. It is a principal part enlarged view of FIG. It is a principal part expanded sectional view of the part which fixes a drive platen with a volt | bolt. It is a principal part expanded sectional view of the part which fixes a frame member with a screw member. FIG. 7 is a diagram corresponding to FIG. 6 according to a modified example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibration welding apparatus 3 Vibrator head 4 Drive platen 8 Upper mold | type 10 Main plate 20 Adsorption mechanism 21 Negative pressure chamber 30A, 30B 1st, 2nd hydraulic clamp mechanism 31 Hydraulic cylinder 33 Piston member 35 Hydraulic chamber

Claims (6)

A vibration welding apparatus that holds a plurality of synthetic resin workpieces between a lower die and an upper die, applies minute vibrations to the workpiece joining surface, and welds the workpiece joining surface by heat generated by friction. In a vibration welding apparatus having a drive platen fixed to the lower surface and the upper mold being fixed, and a plurality of bolts for fixing the drive platen to the vibrator head,
An adsorption mechanism for adsorbing the upper mold to the drive platen by negative pressure;
A first hydraulic clamping mechanism for generating a clamping force directed in a direction parallel to the minute vibration direction in order to fix the upper die to the drive platen;
A vibration welding apparatus comprising:   The drive platen includes a main plate fixed in contact with a lower surface of a vibrator head, and the suction mechanism is provided on a portion near the outer periphery of the main plate to seal a gap between the main plate and the outer periphery of the upper mold. A closed loop-shaped seal member, a negative pressure chamber formed between the main plate and the upper mold inside the seal member, and negative pressure introducing means for introducing a negative pressure into the negative pressure chamber. The vibration welding apparatus according to claim 1. The drive platen includes a clamp frame portion integrally formed with the main plate at one end portion of the main plate in the minute vibration direction and protruding downward, and a receiving frame portion integrally formed with the main plate at the other end portion of the main plate and protruding downward. And
The first hydraulic clamping mechanism includes a plurality of piston members that are attached to the clamp frame portion in the direction of the minute vibration and are capable of pressing the upper portion of the upper mold side toward the receiving frame portion, and the piston members 3. The vibration welding apparatus according to claim 1, further comprising a plurality of hydraulic chambers, each of which applies hydraulic pressure, and first hydraulic supply / discharge means capable of supplying and discharging hydraulic pressure to and from these hydraulic chambers.   2. The vibration welding according to claim 1, further comprising: a second hydraulic clamping mechanism that generates a clamping force directed in a direction orthogonal to the minute vibration direction in order to fix the upper die to the drive platen. apparatus. The drive platen is formed integrally with the main plate at one end of the main plate in a direction orthogonal to the micro-vibration direction, and is integrally formed with the main plate at the other end of the main plate. A receiving portion that protrudes downward and faces one or more clamp mounting portions,
The second hydraulic clamp mechanism includes a plurality of piston members that are mounted on one or a plurality of clamp mounting portions in a direction orthogonal to the micro-vibration direction and can press the upper portion of the upper mold side toward the receiving portion. 5. The vibration welding according to claim 4, further comprising: a plurality of hydraulic chambers that respectively apply hydraulic pressure to the piston members; and second hydraulic supply / discharge means that can supply and discharge hydraulic pressure to and from these hydraulic chambers. apparatus.   The vibration welding apparatus according to claim 1, wherein the negative pressure chamber has a plurality of recesses formed in the main plate so as to face the negative pressure chamber.