JPS6257813A - Method of cutting compound metal wire - Google Patents

Abstract

PURPOSE:To perform cutting of high position accuracy, by irradiating a small diameter X-ray to a boundary part of different kind metals in a compound metal wire before and after the cutting and controlling a distance between an end part of the compound metal wire and the boundary part of the different kind metals to a fixed value by a generated fluorescent X-ray amount. CONSTITUTION:A cutter, irradiating a 2-0.1mm diameter X-ray 5 to a boundary part 4 between a metal base material 1 and a different kind metal 2 and measuring a generated level of fluorescent X-ray (characteristic X-ray) intensity, measures a position of the boundary part 4, and the cutter controls its inlet side guide device. If the boundary part 4 is laterally shifted for a fixed part of the irradiated X-ray 5, the cutter, using the guide device, laterally moves the running position of a compound metal wire 3. By this method, an inlay wire in high position accuracy of a different kind metal compound part can be cut and manufactured over the total length in the lengthwise direction by very small labor.

Description

Detailed Description of the Invention (Technical Field) The present invention is a composite metal strip formed by partially joining dissimilar metals to the surface of a metal base material, that is, a so-called inlay strip. The present invention relates to a method for manufacturing the same.

(Conventional wave elf) As shown in Figures 1a and 1b, the base material 1 is an inexpensive metal material such as copper, copper alloy, stainless steel scrap, etc., and a noble metal such as gold, silver, or a low melting point metal such as solder, etc. A composite metal strip 8, so-called an inlay strip, in which dissimilar metals 2 are partially joined together is used as a material for electrical Y points, lead frames for semiconductors, and the like. In this case, in order to lower the required properties of the composite material and the manufacturing cost,
(aSO) and width (b) must be accurately manufactured and guaranteed.

The manufacturing of such composite metal strips usually involves a process of combining dissimilar metals onto a base material, and a process of cutting the composite metal strip to the width of the product, and the positional accuracy of the dissimilar metals in these two processes is This affects the positional accuracy of dissimilar metals.

For this reason, in the past, the line was occasionally stopped during the cutting process, and the cut composite strip was measured with calipers or visually enlarged using a reading microscope, etc., and the alignment of the guy F on the entrance side of the cutting device was adjusted aIi1. Ta.

However, such a method not only requires a great deal of labor, but also makes it extremely difficult to guarantee specifications over the entire length.

The present invention has been made taking such circumstances into consideration, and the position ff1 of the dissimilar metal composite portion is maintained over the entire length in the longitudinal direction.
This invention provides a method for cutting and manufacturing highly accurate inlay strips with extremely little effort. ◇The present invention continuously cuts composite metal strips formed by partially joining dissimilar metal strips to the surface of a metal base material. In the method of width cutting by running the composite metal strip intermittently or intermittently in the length direction, fluorescence FIG. 2 is a schematic diagram illustrating the cutting method according to the present invention, which is characterized in that the amount of fluorescence X#ji is used as an input signal to a control system that measures the amount of the dissimilar metal strip and keeps the position of the dissimilar metal strip constant. It was shown to.

That is, as shown in FIG. 8, the boundary part 4 between dissimilar metals is irradiated with X&I 5 having a diameter of 2 to 3.1 amφ, and the wavelength of the generated fluorescence X and il (characteristic X-rays) is unique to the metal. Taking advantage of this, the position of the boundary area is determined by measuring the amount of fluorescent X-ray, and the guy F device 10 on the entrance side of the cutting device 6 is controlled in accordance with the amount of fluorescent Xg. It is something.

For example, for a fixed X-ray exposure @5, the boundary 4
When the guide device 10 is controlled to be constant at the position shown in FIG. The running position of the composite metal strip 3 is adjusted using the fourth
In the figure, it is moved to the right, and in FIG. 5, it is moved to the left.

In this case, the wavelength range of fluorescent X-rays to be detected may use either the peak of the base metal or the different metal, but the range with the highest S/N ratio between the different metal composite part and the base metal is selected. It is desirable that
Photographed by the television camera 9 attached to the irradiation system 7
The center position of the line irradiation part 5 may be made to coincide with the boundary part 4, but depending on the surface gloss of the composite metal strip, the boundary part 4 may not be distinguishable on the cathode ray tube. Fluorescence X generated from each composite part
ls amount XA.

Measure xB and find the intermediate value XM = O・Xmu+(
10) ・XB (Tadari, Oha L1.:a ~LJ
, 7 + 7) constant) can be used.

・Example 1 Thickness U as base material, 2m! II. In the process of continuously cutting a phosphor bronze strip with a width of 80mm, a composite strip partially clad with gold of 2μ width and 2mm width approximately in the center, into 25 pieces of metal, at the exit side of the cutting device. 1g5 from one end of the composite strip after cutting
XIs with a diameter of 1 dragon is irradiated at the point U at m, and At! is generated from there! The position of the composite strip width guide on the entrance side of the cutting device was controlled so that the intensity of the fluorescent XM (Lβ) of % of the fluorescent X1s intensity generated from.

As a result, it was possible to cut the position of the boundary part 4 with an accuracy of ±0.2.

According to the present invention, it is possible to cut and manufacture an inlay strip with high positional accuracy of a dissimilar metal composite part over the entire length in the longitudinal direction with extremely little effort.

[Brief explanation of the drawing]

1a and 1b to 5 are explanatory diagrams according to an embodiment of the present invention, respectively.
4...Different metal boundary part 5-X-ray irradiation part 6
... Cutting and mounting 7 ... X-ray irradiation system 8 ... Fluorescence X-ray detection section 9 ... Telephoto camera 10
,... Guide device 11... Control unit 12... Unwinding machine 13... Winding machine 14,... Signal flow Patent applicant Furukawa Electric Co., Ltd. Figure 1a Figure 1b Figure 2

Claims (1)

[Claims] 1. A composite metal strip formed by partially joining dissimilar metal strips to the surface of a metal base material such that the distance between the end of the composite metal strip and the dissimilar metal boundary is constant. In a method of continuous cutting in the longitudinal direction, the amount of fluorescent A method for cutting a composite metal strip, characterized in that the amount of fluorescent X-rays is used as an input signal to a control system that maintains a constant distance between the end of the composite strip and the boundary between dissimilar metals. 2. In claim 1, measuring the amount of fluorescent X-rays X_A and X_B in the same detection wavelength range generated in advance from each of the base metal A and the dissimilar metal composite part B, and the exit side of the cutting device. The X-ray irradiation system is fixed such that the center of the X-ray irradiation part is located at a predetermined distance from the end of the composite strip, and the fluorescent X-ray amount X_M generated by the X-ray irradiation system is X_M=C・X_A+(1■C)・
A method for cutting a composite metal strip, characterized by controlling the position in the width direction of a guide device for the composite strip placed in front of a cutting device so that X_B (where C is a constant of 0.8 or more and 0.7 or less) .