JPH0137837Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reflector device for an ultrasonic welding machine used, for example, in manufacturing heat exchangers for combustion equipment. In general ultrasonic welding, a polymerized workpiece is placed between one end of a reflector fixed at the other end and a tip at the tip of a horn, and the tip applies static pressure to the workpiece. In this method, ultrasonic sliding vibration is applied to the joining surfaces of the welded parts, and the resulting frictional heat melts and joins the welded parts. When used for manufacturing the exchanger 5, it has the following drawbacks.

That is, during the manufacturing process of the heat exchanger 5, ultrasonic welding is used to fix the heat absorption pipe 6 to the heat absorption body 7. First, the heat absorption pipe 6 is wound around the outer peripheral surface of the horizontally installed reflector a. Fit the rotated heat absorbing cylinder 7,
Next, a plurality of retaining plates 8 each having a semicircular curved portion 8a that fits the outer peripheral surface of the heat absorption pipe 6 at the center thereof is attached to the heat absorption pipe 6 at each curved portion 8a.
The end portions 8b, 8b are brought into contact with the tip c of the horn b, respectively, and the end portions 8b, 8b are joined to the heat absorbing body 7 by ultrasonic welding. According to this,
Since the reflector a is used merely as a pedestal during welding and is not equipped with a mechanism to securely fix the heat absorbing cylinder 7, local static pressure and sliding vibration caused by the chip c during welding are , the heat absorbing cylinder 7
The portion of the heat absorbing cylinder 7 which is not touched by the tip c repeatedly lifts up from the reflector a and comes into contact with the reflector a, resulting in deformation of the heat absorbing cylinder 7. The purpose of the present invention is to provide a device that eliminates the above-mentioned disadvantages, and as shown in FIGS. At the upper part of each, a spring member 3 is pivotally suspended to the upper mounting member 2, and is stretched between both the reflecting plates 1, 1 to bias the lower end sides of both the reflecting plates 1, 1 inward. , a slope 1a that slopes upward and outward is formed on the inner surface of each of the reflection plates 1, 1, and a slope 1a that is in contact with the slope 1a is formed between the inner surfaces of each of the reflection plates 1, 1. A cam 4 that pushes the lower end of the cam 1 outward is arranged so as to be slidable in the vertical direction.

The reflector 1 is provided with a notch 9 at the center of its upper end, and is engaged with the end of the mounting member 2 at the notch 9, and is pivotally suspended to the mounting member 2 by a pivot pin 10. At the same time, a slope 1a that slopes upward and outward is formed at the center of the inner surface, and a large number of small irregularities 11 are provided on the entire outer surface to increase the frictional force with the inner surface of the heat absorption cylinder 7. It will be done.

The cam 4 is composed of two parallel plate-shaped bodies 4a, 4a arranged on the outside of the mounting member 2 so as to cover the gap between the reflection plates 1, 1 from the sides, and both plate-shaped bodies 4a , 4a are attached to each end of the support member 12 interposed therebetween, for example, by screws, so that the whole has an H-shaped cross section.

The support member 12 has a guide rod 13 extending upward.
The lower end of the guide rod 13 was fixed, and the upper end of the guide rod 13 was fixed to a movable member 15 that was attached to the lower end of a piston rod 14 and moved up and down.

Thus, both plate-like bodies 4a, 4 constituting the cam 4
a moves following the vertical movement of the piston rod 14, and when the upper surface of the support member 12 comes into contact with the lower surface of the mounting member 2 during their upward movement, it is pivoted to the mounting member 2. Both reflectors 1 supported
With 1 suspended, move further upwards, and both reflectors 1, 1
is stopped at the upper limit movement position of the piston rod 14, which is separated from the heat absorbing cylinder 7, and the downward movement is performed at the lower limit of the piston rod 14, where the lower end surface thereof becomes substantially flush with the lower end surface of the reflector plate 1. It is stopped at the moving position.

Next, its operation will be explained with reference to FIGS. 4 and 5.

Before and after welding, the piston rod 14 is set at the highest movable position as shown in the fourth figure, and the mounting member 2 that pivotally suspends both the reflectors 1, 1 is connected to the piston rod 14 by the movable member 15 and the guide rod. Two plate-like bodies 4a, 4a are suspended by a support member 12 connected to each other via 13 in order, and connected to the support member 12.
The upper portions of the reflective plates 1 and 2 each protrude above the mounting member 2 from the sides of the mounting member 2, and the lower portions thereof are accommodated in the upper gap existing between the inner surfaces of both the reflecting plates 1, 1.

In this case, a gap is created between the lower part of the plate-shaped body 4a and the upper inner surface of the reflecting plate 1, and the lower end side of both reflecting plates 1, 1 is moved inwardly by the spring member 3 according to the size of the gap. , the distance between the outer surfaces of both reflecting plates 1, 1 is narrower on the lower end side than on the upper end side.

Next, the piston rod 14 is moved downward, and both the reflectors 1, 1 are inserted from above into the heat absorbing cylinder 7 placed so that the heat absorbing fins 16 are located on the lower side.

At this time, since the lower ends of both reflectors 1, 1 are in a narrowed state, both reflectors 1, 1 are in contact with the inner surface of the heat absorbing body 7 until their lower ends abut against the upper ends of the heat absorbing fins 16. There is no contact, and no damage is caused to the heat absorbing cylinder 7 during that time.

The piston rod 14 continues to move downward even after the lower ends of both reflecting plates 1, 1 come into contact with the heat absorption fins 16 and both reflecting plates 1, 1 stop moving downward, and accordingly, the two constituting the cams 4 The lower ends of the plate-like bodies 4a, 4a are connected to slopes 1a, 1a formed on the inner surfaces of both reflecting plates 1, 1.
While pushing outward the reflecting plates 1, 1 whose lower end sides are narrowed inward, proceed further down the slopes 1a, 1a, and move the heat absorbing fin determined by the stroke of the piston rod 14. It stops at a position near the upper end of 16.

In this case, as shown in FIG.
The outer surfaces of both are brought into contact with the inner surface of the heat absorbing cylinder 7, and the heat absorbing cylinder 7 is securely fixed by both reflecting plates 1,1.
Next, the holding plates 8 of a plurality of heat absorption pipes 6 prepared in advance in the same manner as in FIG.
are sequentially moved and brought into contact with both ends of each presser plate 8,
The heat absorbing cylinder 7 is attached to each presser plate 8 by the tip 17.
Appropriate static pressure is applied to the reflective plate 1 in the heat absorbing pipe 6, and sliding vibration with a frequency of about 16 KHz is applied in the longitudinal direction of the heat absorbing pipe 6, so that both ends of each holding plate 8 are connected to the heat absorbing cylinder 7.
The endothermic pipe 6 is fixed to the endothermic body 7.

In this case, since the entire heat absorbing cylinder 7 is securely fixed by both reflecting plates 1, 1 which are in contact with the inner surface of the heat absorbing cylinder 7, deformation of the heat absorbing cylinder 7 will not occur even when the plurality of holding plates 8, 8... are sequentially welded. Does not occur.

After fixing the heat absorbing pipe 6 to the heat absorbing cylinder 7, move the piston rod 14 upward to first bring the lower portions of the plate-like bodies 4a, 4a that make up the cam 4 into sliding contact with the slope 1a, and then move the both reflectors The piston rod 1 is moved into the upper gap between the piston rods 1 and 1, and as a result of this movement, the lower end side of each reflecting plate 1, 1 is moved inward, and the piston rod 1 continues to move upward.
4, the support member 12 is pulled up, the mounting member 2 that pivotally suspends both the reflectors 1, 1 is suspended, and the reflector device is separated from the heat absorbing body 7 and finally returns to the position shown in FIG. .

According to the configuration of the above embodiment, when manufacturing the heat exchanger, a plurality of heat absorbing cylinders 7 with the heat absorbing fins 16 facing downward are arranged side by side in advance, and a reflection plate device is inserted into each heat absorbing cylinder 7 in turn. , presser plates 8, 8 disposed to engage with appropriate locations of the heat absorbing pipe 6 by external tips of each heat absorbing cylinder 7;
Multiple heat exchangers can be manufactured in a short time simply by welding...A heat exchanger with heat absorption pipes fixed to the heat absorption cylinder after welding is completed as in the case of general ultrasonic welding. It is effective for automatic assembly of heat exchangers because it is more efficient in mass production than the method in which the heat absorbing cylinder is removed from the reflector, the next heat absorbing cylinder is fitted onto the reflector, and then welded.

It should be noted that the reflector device of the present invention is not inserted into the heat absorbing body 7 and used only for fixing the heat absorbing body 7 as in the above-described embodiment, but is also used as a cylinder having the same shape as the heat absorbing body 7. Of course, the present invention can be applied to all cases of fixing shaped frames. As described above, according to the present invention, a spring member 3 that biases the lower end side of each reflector inward is stretched between the pair of reflectors 1, 1 which are pivotally suspended from the mounting member 2, and each reflector A slope 1a that slopes upward and outward is formed on the inner surface of each reflector 1, 1, and the lower end side of each reflector 1, 1 is in contact with the slope 1a between the inner surfaces of each reflector 1, 1. Since the cam 4 that pushes outward is arranged so that it can slide freely in the vertical direction,
If this reflector plate device is inserted into the heat absorption cylinder or other cylindrical frame of a heat exchanger, and the cam 4 is moved downward to push the lower end side of each reflector plate 1, 1 outward, each reflector plate 1 and 1 are in contact with the inner surface of the cylindrical frame, and unlike when using a general reflector, there is no gap between the cylindrical frame and the reflector, so there is no gap during ultrasonic welding. The cylindrical frame is reliably fixed by the reflecting plate device, and the cylindrical frame will not be deformed even by local static pressure and sliding vibration caused by the chip.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a heat exchanger, Fig. 2 is an external perspective view showing an example of the reflector device of the present invention, Fig. 3 is a cut-away side view thereof, and Figs. 4 and 5 are the present invention. It is an explanatory view when the reflector device of 2 is used for manufacturing a heat exchanger. DESCRIPTION OF SYMBOLS 1...Reflector, 1a...Slope, 2...Mounting member, 3...
Spring member, 4...cam.

Claims (1)

[Scope of utility model registration request] a pair of reflective plates 1 arranged opposite to each other with a gap between them;
1 at the upper part of the upper mounting member 2, respectively.
At the same time, a spring member 3 is provided between both reflecting plates 1, 1 to bias the lower end sides of both reflecting plates 1, 1 inwardly, and the inner surface of each reflecting plate 1, 1 is A slope 1a that slopes upward and outward is formed between the inner surfaces of each reflecting plate 1, 1, and abuts against the slope 1a to push the lower end side of each reflecting plate 1, 1 outward. A reflector device for an ultrasonic welding machine, which has a cam 4 arranged so as to be slidable in the vertical direction.