JPH0651355B2 - Welding method and apparatus using compound vibration - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for directly welding joints of objects to be welded by using a composite vibration.

[0002]

2. Description of the Related Art Heretofore, as this type of vibration welding method and apparatus, there have been known those using ultrasonic waves, those using rotary vibrators, those using electromagnetic vibrators, etc. The thing which uses a vibrator.

[0003]

Since the conventional electromagnetic vibrator uses only the vibration from a single direction, the directionality is generated in the joining, and high precision, high strength, and high stability are obtained. Is not sufficient for welding things such as Fierre tanks, and it is possible to weld plastics but not materials such as non-ferrous metals, ceramics, and Teflon. It was

The object of the present invention is to improve the welding accuracy, strength, and
Another object of the present invention is to provide a welding method and apparatus which are improved in stability and can be welded even with a material that has been conventionally considered to be incapable of vibration welding.

[0005]

In order to achieve the above-mentioned object, the present invention relates to the above-mentioned one object to be adhered while superposing a pair of parts to be adhered to each other and applying a static pressure in the joining direction. Vibrations having the same and / or different vibration frequencies and vibration widths are applied to the other object to be adhered from different directions from the direction intersecting the direction in which the static pressure is applied.

The present invention further comprises a pair of platens which are provided so as to face each other and are movable in opposite directions, and a vibration having the same and / or different vibration frequency and width from different directions is applied to the platen. It is composed of an electromagnetic vibrator that can be used and a cylinder device that moves the respective platens in opposite directions.

[0007]

As a result, vibrations having the same and / or different amplitudes and frequencies are applied to the material to be welded from different directions, and as a result, the vibration locus is inverter-controlled in a square shape, an elliptical shape, or a circular shape. As a result, there is no directivity like welding in the case of vibration in only one direction, high density energy is generated,
The temperature at which frictional heat is generated rises and diffusion bonding becomes possible.

As for the apparatus, the welded pieces attached to the jigs, which are attached to the platen provided independently in the vertical direction, are subjected to static pressure in the joining direction by the cylinder, and they are connected to each other in the horizontal direction via the electromagnetic vibrator. Vibrations with the same and / or different amplitudes and frequencies are applied from different directions.

[0009]

Embodiment 1 The drawings show an embodiment of the present invention. In FIGS. 1 to 4, spindles 2 are provided upright on both sides of a machine casing 1. A lift table 3 is attached in a horizontal state so as to be vertically movable by axially inserting both sides of the support shafts 2 and 2. The lift table 3 can be moved in the vertical direction by a hydraulic cylinder 4, for example. A recess 5 is provided in the center of the lift table 3, and a lower platen 6 having a space 6a in the center is housed in the recess 5 so as to be slidable in the horizontal direction. As shown in FIG. 3, a pair of resonance springs 7, 7 are attached to the lower platen 6 with the lower ends thereof fixedly attached to the both sides of the lower platen 6. Then, the pair of electromagnetic coils 8 and 8 are fixed. Reference numeral 10 is a non-contact type amplitude detector. And on this lower platen 6,
As shown in FIG. 6, a jig 9a is attached, and one of the objects to be welded 11a such as a Fierre tank is fixed to the jig 9a.

A head 12 which is located above the lift table 3 and has both sides supported by the support shafts 2 and 2 and which has a recess 12a in the center thereof is also horizontal in the direction orthogonal to the lift table 3. The head 12 is attached in a state, and the head 12 can also be moved in the vertical direction by, for example, a hydraulic cylinder 13. As shown in FIG. 4, an upper platen 14 having a space 14a is horizontally slidably housed in the recess 12a of the head 12, and both sides of the upper platen 14 are housed in the head 12. A pair of electromagnetic coils 15 and 15 are fixedly located at. Before and after the upper platen 14 in the head 12, a pair of resonance springs 16 and 16 are suspended with their upper ends fixed.
The upper platen 14 is fixed to the lower ends of the resonance springs 16 and 16. And this upper platen 1
4, a jig 9b is attached to it as shown in FIG.
The other object 11b to be welded is fixed to the jig 9b. In addition, what is installed on both rear sides of the machine casing 1 are hydraulic units 17 and 18 for sending oil to the hydraulic cylinders 4 and 13, respectively, and a control box provided on the right side of the machine casing 1. 19 and
20 and 20 are fixed position stoppers, and 21 is a non-contact type amplitude detector.

FIG. 5 shows the structure of the lift table and the bearing portion of the head. For example, the head 12 is provided with a bearing hole 22 having a plurality of step portions 22a inside, and the bearing hole 22 is made of, for example, epoxy urethane. Damping member 2
A sleeve 24 provided with a step portion 24a on the outer circumference is attached via the sleeve 3. The support shaft 2 is inserted into the sleeve 24 via a ball bearing 25.

Accordingly, as shown in FIG. 6, the objects to be welded 11a and 11b are fixed to the lower and upper platens 6 and 14 through jigs 9a and 9b, respectively. Next, the hydraulic cylinders 4 and 13 are actuated to move the lift table 3 and the head 12 in the vertical direction, and the objects to be welded 11a and 11b are welded.
When the electromagnetic coils 8, 8, 15 and 15 are energized while applying static pressure from above and below in the joining direction, the resonance springs resonate and the upper platens 6 and 14 are orthogonal to each other. Horizontally oscillates to 11
Composite vibration is applied to the joint between a and 11b. At that time, the upper platen 6 and the lower platen 14 are given the same or different vibration amplitude and vibration frequency. From the base, this vibration width and frequency can be freely changed for both upper and lower platens, and thereby the vibration locus can be controlled by an inverter from linear to square, elliptical, or circular. This makes it possible to create a vibration pattern suitable for the material to be welded.

[0013]

Example 2 Teflon was selected as the constituent material of the object to be welded using the above-mentioned apparatus, and the well-known processing such as welding boss was applied to the joint part of one of them, and each was treated on the upper and lower platens. It was fixed through the tool. Then, a static pressure of 30 kg per cm 2 is applied to the material to be welded from above and below,
A vibration having a frequency of 120 H2 and an amplitude of 4 mm was applied for 10 seconds in a direction orthogonal to the horizontal direction.
After that, the equipment was stopped, the welded material was removed from the jig, and the tensile strength was measured.
The strength was the same as that of the other parts, and no change with time was observed even after several weeks. Further, there was no welding unevenness at the joint portion, and no water leakage occurred at the time of water pressure resistance test. Then, the welded portion was cut and the welded state was closely observed and observed, but no directionality was observed in the joining direction, and it was found that the diffusion bonding was completed.

[0014]

[Example 3] Aluminum was selected as the constituent material of the material to be welded, fixed to the upper and lower platens through a jig in the same manner as described above, and then static pressure of 45 kg per cm2 was applied to vibrate. Vibration width of 4m at 120H2
After applying vibrations perpendicular to each other in the horizontal direction for 10 seconds, the tensile strength was measured by removing from the jig, and both were completely bonded, and the strength was the same as the other portions. In addition, a water pressure resistance test was conducted on the joint, but no water leakage occurred. The joined state was also completely diffusion joined.

[0015]

[Example 4] Ceramics were selected as the objects to be welded, fixed to the upper and lower platens through jigs in the same manner as described above, and then a static pressure of 100 kg per cm2 was applied, and a frequency of 300H2 was applied. Then, vibrations each having a vibration width of 4 mm were applied for 10 seconds from the directions perpendicular to each other. After that, this was removed from the device and the tensile strength was measured. As a result, it had sufficient strength and no change with time was observed. As a result of the water pressure resistance test, there was no water leakage, and the joining state was the same as in the above-mentioned examples.

As described above, in the case of aluminum and ceramic, if the preheating is performed at 400 ° C. and 600 ° C., respectively, the welding can be performed even if the time for giving the vibration is shortened, and the strength is generally improved. It was observed.

[0017]

Since the present invention is constructed as described above,
As a result of complex complex vibrations being applied to the material to be welded, the high-density energy required for diffusion bonding is generated at the joint, not to mention plastics that were previously impossible, but also non-ferrous metals, ceramics, Teflon, etc. The object to be welded made of the above material can be stably welded with high accuracy and high strength.

[Brief description of drawings]

FIG. 1 is a perspective view of a composite vibration welding machine according to the present invention as seen obliquely from the front.

FIG. 2 is a perspective view of the composite vibration welding machine according to the present invention as seen obliquely from the rear.

FIG. 3 is an exploded perspective view of a portion of a lift table.

FIG. 4 is an exploded perspective view of a head portion.

FIG. 5 is a sectional view showing a bearing structure of a lift table and a head.

FIG. 6 is an explanatory diagram showing an implementation state of composite welding.

[Explanation of symbols]

 1 Machine Frame 2 Spindle 3 Lift Table 4 Hydraulic Cylinder 6 Lower Platen 7 Resonant Spring 8 Electromagnetic Coil 9a, 9b Jig 11a, 11b Welded Object 12 Head 13 Hydraulic Cylinder 14 Upper Platen 15 Electromagnetic Coil 16 Resonant Spring 22 Bearing Hole 23 Damping member 24 Sleeve 25 Ball bearing

Claims (2)

[Claims] 1. A pair of welded objects are overlapped with each other,
While applying a static pressure in the joining direction, a direction in which the static pressure is applied to the one adherend and the other adherend from different directions of vibrations having the same and / or different vibration frequencies and vibration widths. A welding method using compound vibration, which is characterized in that it is applied from the crossing direction. 2. A pair of platens provided to face each other and movable in opposite directions, and an electromagnetic type capable of giving vibrations having the same and / or different vibration frequencies and vibration widths to the platens from different directions. A welding device using compound vibration, comprising a vibrator and a cylinder device for moving the respective platens in opposite directions.