JPH11277631A - Vibratory welding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibratory welding apparatus of which an upper jig is fixed stably and which facilitates replacement. SOLUTION: An upper one 13 of jigs in a set for welding materials to be machined is provided in continuity on the lower side of a drive platen 12 which is fitted continuously to a vibrator head 10 with indentation engagement means such as cone bodies 14 and conical holes provided as intermediaries, and the drive platen 12 and the upper jig 13 are connected removably to the vibrator head 10 by screw means 16. Besides, the drive platen 12 and the upper jig 13 are so designed that they can be provided fixedly by a fire hose which is borne by a slide guide provided continuously to the drive platen 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the field of vibration welding technology in which a plastic member or the like having thermoplasticity is joined and a welding process is performed by generating frictional heat on the joining surface.

[0002]

2. Description of the Related Art Conventionally, this kind of vibration welding technique has been widely used. For example, as shown in FIG. 6, an upper jig U is brought into contact with a lower surface of a drive platen D continuously connected to a lower surface of a vibrator head V. Then, the upper jig U is attached by screwing a large number of taper bolts B inserted through the through holes H of the upper jig U with a screw hole of the vibrator head V or a specified torque (prior art). .

[0003]

In the above-mentioned prior art, the vibration generating portion and the upper jig are firmly connected by the taper bolt B, and the vibration displacement (phase displacement) between the contact surfaces thereof. ) Was not observed, and for example, welding failure due to metallic seizure or vibration energy loss at the contact surface, noise or harmful vibration, and resulting damage could be safely prevented.

[0004] However, in the prior art, it is time-consuming and time-consuming to perform a setup change operation in order to stably fix the upper jig U with a large number of bolts or the like at the time of the welding process, which is a practical solution. It should have been an issue to be addressed.

A first problem to be solved by the present invention is that an upper jig on the vibrating side is connected to a vibrator head by a concave / convex engaging means so that vibration welding can be performed effectively with little vibration loss. It is to be.

A second problem to be solved by the present invention is to provide an apparatus in which the upper jig can be easily attached and detached by a small number of screw means.

[0007] A third problem to be solved by the present invention is to provide an upper jig which can be firmly fixed by an inflatable fire hose.

[0008]

The contents of the corresponding means of the present invention for solving the above-mentioned problems are as follows.

(1) A vibration welding apparatus for applying a minute vibration to a contact surface of a plurality of workpieces to generate heat due to friction and to weld the workpieces. A vibration welding device connected to a lower surface of a drive platen connected to a vibrator head with an upper jig interposed with a concave / convex engaging means.

[0010] (2) The above-mentioned (1), wherein the concavo-convex engaging means is a downwardly tapered cone body projecting from the lower surface of the drive platen and an upwardly open conical hole formed in an upper jig. Vibration welding equipment.

(3) The vibration welding apparatus according to (1) or (2), wherein the drive platen and the upper jig are detachably connected to the vibrator head by screw means.

(4) The vibration welding apparatus according to (1) or (2), wherein the drive platen and the upper jig can be fixed by a fire hose carried on a slide guide connected to the drive platen.

[0013]

(Embodiment 1) A vibration welding apparatus 100 according to the present invention shown in FIGS. 1 to 4 has a lower surface of a vibration generating section 11 provided in a vibrator head 10 suspended from a fixed frame 200. The upper jig 13 is detachably connected to the drive jig 13 with a drive platen 12 interposed therebetween.
The fixing tool 23 is disposed opposite to the fixing frame 200. The upper and lower support plates 52 and 51 are interposed on the elevating frame 40 which is moved up and down by the elevating means 30 vertically attached to the fixed frame 200, and is detachably exchanged. It is arranged as possible.

Next, with regard to the means for attaching the upper jig 13, as shown in FIGS.
The cone 14 is brought into contact with the lower surface of the cone so as to taper downward, the stepped through-hole 141 of the cone 14 is aligned with the mounting screw hole 121, and the headed bolt 15 is connected to the stepped through-hole 141. The plurality of cones 14 are attached to the lower surface of the drive platen 12 so as to protrude downward by being screwed into the mounting screw holes 121.

Further, the upper jig 13 has a plurality of conical holes 131 which are opened upward and are capable of receiving the cone 14.

Therefore, when attaching the upper jig 13 to the lower surface of the vibrator head 10, the drive platen 12 is brought into contact with the lower surface of the vibrator head 10 as shown in FIG. The upper jig 13 is brought into contact with the lower surface of the drive platen 12 such that the cap screw 16 is inserted through the drive platen 12 and through holes 122 and 132 provided in the upper jig 13. By screwing the upper jig 13 onto the vibrator head 1 at once
It is attached to 0.

As shown in FIG. 3, a lower support plate 51 is fixed on the upper surface 41 of the lifting frame 40, and a conical shape is formed on the top surface of the lower support plate 51. A guide pin 53 is protruded, and the fixing jig 23 is provided.
The fixing jig 23 is set on the elevating frame 40 such that a conical hole-shaped socket 54 provided on the lower surface of the upper support plate 52 is fitted on the guide pin 53.

In order to move the upper jig 23 up and down, the cylinder 31 of the elevating means 30 is suspended from the fixed frame 200, and the lower end of the piston rod 32 is connected to the elevating frame 40.

Next, the state of use will be described. As shown in FIG. 4, an ABS resin, an acrylic resin, a polycarbonate, a polyacetal fluororesin, a nylon, a polyethylene, which is welded between the upper jig 13 and the fixing jig 23. , A processing material W1 made of a thermoplastic resin such as polypropylene,
With the W2 interposed in a laminated state, the elevating means 30 is started, the piston rod 32 and the cylinder 31 are reduced, and the fixing jig 23 is raised together with the elevating frame 40,
Work materials W1 and W2 are sandwiched between both jigs 13 and 23, and about 5
The vibration generator 11 is started in a state where a pressure of about 0 kg to 1500 kg is applied, and for example, 100 Hz to 240 H
A vibration of about z is generated to induce a relative movement of about 1.0 to 4.0 mm on the contact surface between the workpieces W1 and W2.

As a result, the work materials W1, W
Since the 2 is melted, the lateral vibration generating unit 11 is temporarily stopped.

During this time, in about 1.0 second, the above-mentioned molten region is integrally and firmly fixed by natural cooling.

After the vibration welding process, the jigs 13 and 23 are opened by the lifting / lowering means 30, and the workpieces W1 and W2 are taken out to complete the processing step.

During the welding process, the drive platen 12 and the upper jig 13 make the cone 14 into the conical hole 1.
The vibration of the vibration generating portion 11 is transmitted to the upper jig 13 without any loss because the vibration is generated so as to be fitted to the upper jig 31 so that the welding operation can be completed effectively. Since the lateral vibration applied to 13 is transmitted between the cone body 14 and the tapered surface of the conical hole 131, stress is applied to the headed bolt 15 in the pulling-out direction, and as a result, the headed bolt 15 is loosened. And can improve the transmissibility of the transverse vibrations efficiently.

During the welding process, the upper support plate 52
Is fixed to the lower support plate 51 in a state where the guide pins 53 of the lower support plate 51 are tightly fitted in the sockets 54 provided on the lower surface thereof. In addition, it is stably fixed and does not cause vibration loss, and can be effectively subjected to vibration welding.

Further, when the upper jig 13 is replaced, the cap screw 16 may be simply screwed in and out, and the replacement operation is extremely simple. For example, about four cap screws 16 are provided. A sufficient effect can be exerted by itself.

When replacing the fixing jig 23, the guide pin 53 is pulled out of the socket 54 only by raising the upper supporting plate 52, and the fixing jig 23 is moved together with the upper supporting plate 52 from the lifting frame 40. Since it is removed, the replacement operation is also simple.

(Embodiment 2) A vibration welding apparatus 100A shown in FIG. 5 is different from Embodiment 1 in that an upper jig 13A is used.
Is configured to be fixed to the drive platen 12A by the inflatable fire hose 60A.

That is, a slide guide 70A having a channel 71A for accommodating the fire hose 60A is fixedly provided on the lower surface of the drive platen 12A, and the upper jig 13A can be supported on a support portion 72A at the inner end thereof. At the same time, a fire hose 60A is arranged on the lower surface of the upper jig 13A.

Numeral 80A is a fluid means capable of supplying and exhausting the fire hose 60A.

In the vibration welding apparatus 100A, the fluid means 80A is activated at the time of the vibration welding operation to supply the fire hose 60A and change from the contracted state shown by the solid line to the expanded state shown by the virtual line. The upper jig 13A is raised to be connected to the drive platen 12A. At the time of replacement, it is only necessary to reduce the size of the fire hose 60A, so that the operation becomes extremely easy.

[0031]

The specific effects of the present invention described above are as follows.

The vibration loss is small and the welding process can be performed effectively.

Vibration is imparted to the upper jig by the cone body and the conical hole, so that the cone body is not loosened and the welding process can be performed stably.

The replacement of the upper jig can be easily performed in a short time.

[Brief description of the drawings]

FIG. 1 is an assembly view of a main part of a first embodiment.

FIG. 2 is an enlarged view of a circle (a) in FIG. 1;

FIG. 3 is a partially enlarged view showing a fixing jig attaching means.

FIG. 4 is a side view of a vibration welding device common to the first and second embodiments.

FIG. 5 is a partially enlarged view of a main part of the second embodiment.

FIG. 6 is an assembly view of a main part of the prior art.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Vibration welding device 10 (A) Vibrator head 12 (A) Drive platen 13 (A) Upper jig 131 (A) Conical hole (concavo-convex engaging means) 14 (A) Cone body (concavo-convex engaging means) 15 heads Bolt (screw means) 60A Fire hose 70A Slide guide

Claims (4)

[Claims] 1. A vibration welding apparatus for applying a minute vibration to a contact surface of a plurality of workpieces to generate heat due to friction and to weld the workpieces. A vibration welding device connected to a lower surface of a drive platen connected to a vibrator head with a jig interposed with a concave / convex engaging means. 2. The vibration according to claim 1, wherein said concave / convex engaging means comprises a downwardly tapered cone protruding from a lower surface of said drive platen, and an upwardly open conical hole formed in an upper jig. Welding equipment. 3. The vibration welding apparatus according to claim 1, wherein said drive platen and said upper jig are detachably connected to said vibrator head by screw means. 4. The vibration welding apparatus according to claim 1, wherein said drive platen and said upper jig can be fixedly mounted by a fire hose carried on a slide guide connected to said drive platen.