JPH0491878A - Mole frame welding equipment - Google Patents

Abstract

PURPOSE:To improve reliability and dimensional accuracy of joining without complicating equipment in forming a hooplike frame by irradiating joining parts of strip mold frames with a laser beam to perform welding thereon. CONSTITUTION:The strip mold frames 8 are first supplied from a supply part 6 to a cleaning part 2 to clean the joining part 4. The cleaned strip mold frames 8 are conveyed to an alignment part 5 and joining parts 10a are aligned. At this time, the dimensional accuracy between the frames is measured optically by a measurement part 3 and the measured data are impressed on the alignment part 5. The dimensional accuracy of the strip mold frames 8 at the alignment part 5 is secured based on the measured data of the measurement part 3 and the strip mold frames are conveyed to the joining part 4 in the state as they are. Fitting places of the joining parts 10a are irradiated with the laser beam given via an optical cable 1c from a laser beam oscillation unit 1 and the joining part 4 is joined by laser beam welding.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a technology for manufacturing a hoop-shaped frame, and in particular to a method for manufacturing a hoop-shaped frame by welding strip-shaped molded frames into strips. It's about techniques that work.

[Conventional technology]

For example, in the manufacture of diodes, one or more molds (semiconductor chips molded with resin material) are mounted on one strip-shaped mold frame, and these are used in each subsequent process (wire bonder, mold, deburring, etc.). soldering, marking, etc.).

However, if the strip-shaped mold frames are conveyed one by one, there is a limit to mass production. Therefore, a method of using a frame formed by connecting a plurality of rectangular molded frames to form a hoop shape (hereinafter referred to as a hoop frame) has been considered.

That is, molds are mounted on a hoop-shaped frame at regular intervals, and the molds are continuously transported to each process to perform predetermined processing.

By the way, the present inventor studied a technique for manufacturing a hoop-shaped frame by sequentially connecting strip-shaped molded frames.

The following are the techniques studied by the present inventor, and the outline thereof is as follows.

That is, when manufacturing a hoop-shaped frame, both ends of a large number of rectangular molded frames are longitudinally welded together in tandem to form a single belt-shaped frame.

For welding in this case, electric resistance welding (spot welding, butt welding, etc.) is used.

[Problem to be solved by the invention]

However, in a hoop-shaped frame manufactured by welding rectangular molded frames as mentioned above, it is necessary to frequently dress the welding electrode.

In addition, the inventors have found that there are problems in that the life of the electrode is shortened due to severe electrode wear caused by the welding arc, and the welding strength becomes unstable due to dirt on the welding surface, reducing the reliability of the connection. Found out.

In addition, optical sensors, proximity sensors, etc. are required to ensure the straightness of the opening of the strip-shaped mold frame and the accuracy of the package pitch, which leads to the problem that the equipment configuration becomes complicated and costs increase. .

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a technique that can improve welding reliability and dimensional accuracy using simple equipment.

The above objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[Means to solve the problem]

A brief overview of typical inventions disclosed in this application is as follows.

That is, the mold frame welding device creates a hoop-shaped frame by sequentially connecting strip-shaped mold frames in the longitudinal direction, and is provided with a welding means for welding by irradiating the connection portions of the strip-shaped mold frames with a laser beam. That's what I do.

[Effect]

According to the above-mentioned means, the Radhe light irradiated onto the connection portion performs welding without causing the member on the welding side to come into contact with the connection portion. Therefore, the wear of the electrodes due to the welding arc, which has been a problem in the past, does not occur, and connections can be made without considering electrode wear.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of a mold frame welding apparatus according to the present invention.

Optical cables 1a, lb, and lc are connected to a laser oscillation unit 1 (welding means) that generates laser light. The optical cable 1a is connected to a cleaning section 2 that cleans the joint, and the optical cable 1b is connected to a measuring section 3 (that measures the dimensional accuracy between the strip frames to be joined).
A measuring section &) is connected to the optical cable Ic, and a joining section 4 for connecting the strip frames to each other is connected to the optical cable Ic.

A positioning section 5 that performs positioning during bonding is connected to the measuring section 3, and this positioning section 5 is connected to the cleaning section 2 and the bonding section 4. Furthermore, in the cleaning section 2, a strip-shaped mold frame is attached to the cleaning section 2.
A supply section 6 is connected to the joint section 2, and a collection section 7 is connected to the joint section 4 for collecting the hoop-shaped frame formed by joining.

2 and 3 are a front view and a plan view showing one of the rectangular molded frames used for the hoop-shaped frame, and FIGS. 4 and 5 are the rectangular molded frames shown in FIGS. 2 and 3. FIG. 3 is a front view and a plan view showing a hoop-shaped frame manufactured by connecting molded frames in the longitudinal direction.

A mold 9 is mounted on the strip-shaped keeled frame 8 at a predetermined mounting position. A hoop-shaped frame 10 is made by connecting the rectangular molded frames 8 to form one strip. Joint portions 10a are formed between the rectangular molded frames 8 so that they overlap by a predetermined width.

In the above configuration, first, the strip-shaped mold glue 8 is supplied from the supply section 6 to the cleaning section 2, and the joint portion is cleaned. This cleaning is not performed mechanically, but by irradiating the joint with a laser beam applied from the laser oscillation unit 1 via the optical cable 1a to burn off dirt and the like on the surface.

The cleaned strip-shaped mold film I/-me 8 is conveyed to the positioning section 5, where the positioning of the joint portion 10a is performed. This positioning is performed using laser light supplied from the laser oscillation unit 1 via the optical cable 1b. At this time, the measurement unit 3 optically measures the dimensional accuracy between the frames, and the measurement data is applied to the alignment unit 5.

The rectangular mold frame 8 in the alignment part 5 is
The accuracy (straightness, baggage pitch accuracy, etc.) is ensured based on the measurement data of the measurement section 3, and the joint section 4/transportation 4 is carried out in that state. The joining portion 4 is joined by laser welding by irradiating the joining portion of the joining portion 10a with a laser beam provided from the laser oscillation coat 1 via the optical cable 1c.

By repeating the above operation every time one strip-shaped mold frame 8 is conveyed, one hoop-shaped frame 10 can be obtained. This hoop-shaped frame has high precision and excellent welding reliability. The hoop-shaped frames that have been joined by the joining section 4 are sequentially collected by the collecting section 7.

According to this embodiment, the existing introduction process (with mold,
Production is possible without changing equipment for wire attachment) and molding processes. The hoop-shaped frame simplifies the frame transport mechanism for each process of stripping, Y-field coating, and marking, and also enables continuous processing, which improves productivity. .

6 and 7 are a front view and a plan view showing a second welded structure according to the present invention.

In FIGS. 3 and 4, the rectangular molded frames 8 are connected so as to have mutually overlapping portions, but in this example, the connections are made using butt welding.

In this case, the production of the hoop-shaped sheet 10 is achieved by using the apparatus shown in FIG. 1 and sequentially carrying out the steps described above.

Moreover, FIGS. 8 and 9 are a front view and a plan view showing a third welded structure according to the present invention.

In this example, a gap is provided between the rectangular molded frames 8 11, and a separate part 11 is welded to cover this gap. The manufacturing process and the mold frame welding device used are as described above, so a description thereof will be omitted.

Above, the invention made by the present inventor has been specifically explained based on Examples, but it goes without saying that the present invention is not limited to the Examples and can be modified in various ways without departing from the gist thereof. stomach.

In the above description, the invention made by the present invention is mainly applied to the manufacturing of semiconductor devices, which is its field of application, but the invention is not limited to this. type'il, j
It is also possible to apply it to capacitors, etc.).

〔Effect of the invention〕

Among the inventions disclosed in this application, the effects obtained by typical ones are briefly explained below.

That is, the mold frame welding device creates a hoop-shaped frame by sequentially connecting strip-shaped mold frames in the longitudinal direction, and the welding means welds by irradiating the connection portion between the strip-shaped mold frames with a laser beam. Since this is provided, connection reliability and dimensional accuracy can be improved without complicating the equipment.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a molded frame welding device according to the present invention, FIG. 2 is a front view showing one of the strip-shaped molded frames used for the hoop-shaped frame, and FIG. 3 is the same as that shown in FIG. A plan view of a rectangular molded frame, FIG. 4 is a front view showing a hoop-shaped frame manufactured by longitudinally connecting the rectangular molded frames shown in FIGS. 2 and 3, and FIG. top view of the shaped frame, v! ,6
7 is a plan view of the hoop-shaped frame of FIG. 6, FIG. 8 is a front view of the third welded structure of the present invention, and FIG. 9 is a front view of the second welded structure according to the present invention. is a plan view of the hoop-shaped frame of FIG. 8; 1... Laser oscillation unit, la, lb, iC...
Optical cable, 2...Cleaning section, 3...-Measurement section, 4...Joint section, 5...Lid matching section, 6...Supply section, 7...Recovery section, 8...Strip of paper shaped mold frame, 9... mold, 10... hoop shaped frame, 1
0a...joint part, 11...separate part. Agent Patent Attorney Dai Tsutsui Kazu 9: Mold Diagram Diagram Diagram Diagram Diagram 11: Separate Parts

Claims (1)

[Scope of Claims] 1. A mold frame welding device for creating a hoop-shaped frame by sequentially connecting strip-shaped mold frames in the longitudinal direction, the apparatus comprising: irradiating a laser beam onto the connecting portions of the strip-shaped mold frames; A mold frame welding device characterized by being provided with a welding means for welding. 2. The mold frame welding apparatus according to claim 1, further comprising a cleaning means for cleaning the connection portion with a laser beam irradiated on the connection portion prior to the connection by the welding means. 3. The mold frame welding apparatus according to claim 1, further comprising a measuring means for measuring the dimensional accuracy between the strip-shaped mold frames using a laser beam. 4. The mold frame welding apparatus according to claim 1, wherein the welding is performed by making the rectangular mold frames overlap each other, or by butting them together, or by using separate members.