JPS6327909Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of an ultrasonic welding device for joining metals together by ultrasonic welding.

A conventional device of this kind will be explained with reference to FIGS. 1 and 2.

In the figure, 1 is an ultrasonic welding machine, 2 is a chip that receives ultrasonic vibration from an ultrasonic vibration source (not shown), and a square pyramid-shaped projection 2a is formed on the end face of the tip. The vibration direction of the ultrasonic waves is in the direction of arrow f, and the pressing force is applied in the direction of arrow P. Reference numeral 3 denotes a fixed support member made of die steel and provided opposite to the tip 2. An integrally formed anvil 4 is provided at the upper end of the fixed support member 3, and a square pyramid-shaped projection 4a is provided on the tip surface of the anvil 4. It is formed. 3a is a mounting hole for fixing the fixed support member 3 to the fixed body; 5 is a coating made of a material having no affinity for metals such as copper or aluminum; and 5 is a coating coated on the surface of the anvil 4; are members to be welded to be joined to each other, which are overlapped between the chip 2 and the anvil 4 and ultrasonically welded.

That is, in welding using this conventional device, first, the members to be welded 6 and 7 are placed on the end face of the anvil 4 in a superimposed manner, and then the chip 2 is attached to the members to be welded 6 and 7.
Further, the tip 2 is moved in the direction of arrow P to press the welded members 6, 7 against the anvil 4 with a predetermined pressure (150 kg) using the tip 2, so that the tip 2 and the protrusions 2a, 4a of the anvil 4 are covered. It bites into the opposite surfaces of the welding members 6 and 7. With the tip 2 and anvil 4 pressurizing the joint of the welded members 6, 7, ultrasonic vibration is applied to the tip 2 to vibrate the tip 2 in the direction of arrow f, thereby welding the welded members 6, 7. If the joint surfaces of 7 are rubbed, the workpiece 6,
7 can be joined at the joining part.

Incidentally, in the conventional device described above, the anvil 4 is made of die steel that has an affinity with metals such as copper and aluminum, and therefore, the anvil 4 and the welded member 6, which are generated during ultrasonic welding, In order to prevent welding between the anvil 4 and the anvil 4, it is necessary to coat the upper end surface of the anvil 4 with a material that has no affinity with metals such as copper or aluminum, which requires a lot of work. In addition, if the anvil 4 is used for a long time, it will deteriorate and wear out due to ultrasonic vibration.
However, since the anvil 4 is formed integrally with the fixed support member 3, the fixed support member 3 must be replaced, and furthermore, the fixed support member 3 is made to be welded as much as possible even when subjected to ultrasonic vibration. Since the members 6 and 7 need to be held stationary, they are large and extremely uneconomical. Further, the anvil 4 is formed from the fixed support member 3 by cutting or the like, but the size of the anvil 4 itself occupies only a small part of the fixed support member 3, and the yield of the material for the fixed support member 3 is low, resulting in high cost. It was getting high.

This invention aims to eliminate the above-mentioned drawbacks and provides an excellent ultrasonic welding device as described below.

An embodiment of this invention shown in FIGS. 3 and 4 will be described below.

In the figure, reference numeral 3b denotes a groove formed in the fixed support member 3, which is formed at a position substantially perpendicular to the ultrasonic vibration direction f. 8 is the groove 3b
The anvil is removably press-fitted into the anvil and is made of cemented carbide, which has no affinity for metals and has a long life. A square pyramid-shaped projection 8a is formed at the upper end of the anvil. There is.

That is, in this embodiment, the anvil 8 is made of cemented carbide and is provided at a position approximately perpendicular to the ultrasonic vibration direction f of the fixed support member 3. The anvil 8 can be easily installed by press-fitting it into the groove 3b. If the anvil 8 is to be replaced after a long period of use, it can be easily removed by pressing one end of the anvil 8 in the direction of arrow A in FIG. 4 with a punch or the like to release the anvil 6 from the groove 3b.

Then, by press-fitting a new anvil 8 into the groove 3b, the replacement work of the anvil 8 is completed.

As described above, in the embodiment, the anvil 8 is made of cemented carbide, which has no affinity with copper, aluminum, etc. and has a long life. This eliminates the need for additional work. In addition, since the anvil 8 reaches the fixed support member 3 and is press-fitted so that it can be replaced, only the anvil 8 needs to be replaced as long as the anvil 8 has a durable life. Costs can be greatly reduced, and the anvil 8 can be easily replaced using a tool such as a punch, and the complicated work of forming the anvil by cutting from the fixed support member 3, as in the past, is eliminated. Not needed at all.

Furthermore, since the anvil 8 is press-fitted at a position approximately perpendicular to the vibration direction f of the chip 2, the ultrasonic vibrations transmitted to the anvil 8 are transmitted to the fixed support member 3.
Since the applied force is applied to the inner surface of the groove 3b, problems such as the anvil 8 rattling or coming off from the fixed support member 3 do not occur, and the anvil 8 can have sufficient mechanical strength. Another advantage is that a special fixing member for fixing the anvil 8 is not required.

In the above description, the anvil 8 is made of cemented carbide, but it may also be made of other materials that have no affinity with metals such as copper and aluminum, such as ceramic.

As described above, in this invention, the anvil is removably press-fitted into the fixed support member, so if only the anvil is replaced, the fixed support member can be used semi-permanently, reducing material costs. can be saved.

Moreover, it does not require complicated manufacturing work to form the anvil as in the past, and does not require any special members to fix the anvil.
A low-cost device can be provided. Furthermore, since the anvil is press-fitted into a groove substantially perpendicular to the vibration direction of the chip, the ultrasonic vibrations transmitted to the anvil are applied to the inner surface of the groove of the fixed support member. Problems such as the anvil rattling or coming off from the fixed support member do not occur, and it is possible to obtain an anvil with high mechanical strength.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional device, Fig. 2 is a plan view showing main parts of the conventional device, Fig. 3 is a sectional view showing an embodiment of this invention, and Fig. 4 is an implementation shown in Fig. 3. FIG. 3 is a plan view showing main parts of an example. In the figure, 1 is an ultrasonic welding machine, 2 is a chip, 2a is a protrusion, 3 is a fixed support member, 3a is a mounting hole, 3b is a groove, 4 and 8 are anvils, 4a and 8a are protrusions, 5 is a coating, and 6 , 7 are members to be welded. In addition,
The same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A chip that applies ultrasonic vibration by directly pressing the workpiece to be welded, and a chip that is provided opposite to this chip, and has a part facing the chip in the direction of the ultrasonic vibration. An ultrasonic welding device comprising: a fixed support member having a groove formed in a substantially perpendicular direction; and an anvil that is removably press-fitted into the groove and receives the member to be welded. (2) The ultrasonic welding device according to claim (1), wherein the anvil is made of cemented carbide. (3) The ultrasonic welding device according to claim (1), wherein the anvil is made of ceramic.