JPS59177832A - Stretching method of small-gage wire - Google Patents

Abstract

PURPOSE:To enable the originally stretched tension to be maintained after heat cycle, by choosing a small-gage wire whose coefficient of thermal expansion is larger than that of a standard frame body, absorbing the elongated amount caused by the thermal expansion in case of temperature rise, and giving said wire the function maintaining the condition wherein the tension is being applied to said wire. CONSTITUTION:A standard frame body 1 made of ceramics or the like and a supporting frame 7 are fixed on a base plate 6, and in this case fixing metal fittings 2 for the small-gage wire are previously set on the small-gage wire-fixing parts of the standard frame body 1. Next, the ends of small-gage wires 3 whose coefficient of thermal expansion is larger than that of said frame body 1, for instance, such as SUS304 or the like are spot-welded and fixed to the small-gage wire-fixing metal fittings 2. In addition, the other ends of the small-gage wires 3 are fixed to the end parts of springs 4, and the tension of each smallgage wire is adjusted so as to be, for instance, about 250gr by means of an adjustable nut 8. After that, sealing crystalline glass frit or the like which is cementing material is applied on the small-gage wire 3 in order to fix the small-gage wire 3 to the frame body 1. Further, the glass frit is solidified in the burning furnace, and the small-gage wire 3 is fixed to the standard frame body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applied, for example, to a display device in the field of video information equipment.
In a unit with a reference frame and multiple thin wires,
The present invention relates to a thin wire stretching method that prevents the tension of the stretched thin wire from decreasing due to heat history during the manufacturing process and the like.

Structure of the conventional example and its problems In the conventional thin wire stretching method, as shown in FIG. , The thin m (tungsten wire: φ60μm) between this thin wire fixing fitting is 270qr1
Multiple pieces are strung together using the tension of the books, and the metal fittings and thin wires are each fixed by spot welding.

However, with the above configuration, during the manufacturing process, for example, when this unit is placed in a glass container and sealed with a glass frit for sealing, the unit is heated to about 450°C (the lever unit is heated. As a result, the reference frame body 1 (thermal expansion coefficient 94×
10-7/℃) and tungsten thin wire (thermal expansion coefficient 44
This had the disadvantage that the initial tension could not be maintained due to the difference in thermal expansion coefficient (X10 - °C) and thermal deformation during temperature rise.

Purpose of the Invention The present invention solves the above-mentioned drawbacks by providing a method for maintaining the initially stretched tension after thermal cycling (for example, heating at 450° C. for 1 hour and then cooling to room temperature) a thin wire stretched over a reference frame. The purpose of this invention is to provide a method for stretching thin wires.

Structure of the Invention The present invention consists of selecting a thin wire with a higher thermal expansion coefficient than that of the reference frame when stretching a thin wire on a reference frame, and absorbing the amount of elongation due to thermal expansion when the thin wire is heated. Moreover, it consists of providing a function to hold the reference frame and the thin wire in a tensioned state, and providing a bonding material that bonds and fixes the reference frame and the thin wire in a heated state. It has the unique effect of stretching a thin wire with a predetermined amount of tension on the reference frame after heating and cooling by utilizing the difference in expansion coefficients.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows an example of the structure of the thin wire stretching method in the first embodiment of the present invention. In Fig. 2, 1 is a reference frame body, 2 is a thin metal wire fixing fitting, 3 is a thin wire, and 4 is a device that absorbs the amount of expansion due to thermal expansion when the temperature starts to rise and also adds tension. , 6 is a bonding material (crystalline glass frit for sealing) for fixing the thin wire to the reference frame, and 6 is the reference frame 1. This is a base plate to which the support frame 7 is fixed. The method for stretching the thin wire configured as described above will be described in detail below.

First, a reference frame body 1 and a support frame 7 made of ceramic or glass are fixed to a base plate 6. At this time, an Al silver wire-like fixing bracket 2 made of a material having approximately the same thermal expansion coefficient as the reference frame, in this example a nickel alloy, is set and fixed in the part where the thin wire is to be fixed to the reference frame 1 in advance. . Next, use a material with a larger coefficient of thermal expansion than the reference frame 1, for example, 5US304.
Alternatively, the end of a thin wire 3 made of completely non-magnetic stainless steel and having a wire diameter of 100 μm is fixed by spot welding or laser welding to the thin wire fixing fitting 2. Furthermore, the other end of the thin wire 3 is fixed to the end of the spring 4, and the tension of each thin wire is about 260 gr.
Adjust with adjustment nut 8 so that Thereafter, in order to fix the thin wire 3 to the reference frame 1, a bonding material, in this case crystalline glass frit for sealing, is applied over the thin wire 3. Furthermore, the glass frit is inserted into a firing furnace in the above-described condition, which is attached to the base plate, and kept at about 450° C. for 1 hour to solidify the glass frit, and the thin wire 3 is fixed to the reference frame 1.

As described above, according to this embodiment, a thin wire with a thermal expansion coefficient similar to that of the reference frame body is selected, and when the thin wire is heated, the amount of elongation due to thermal expansion is absorbed, and the tension is applied. By providing a function to maintain the same condition and by providing a bonding material that bonds and fixes the reference frame and the thin wire in a heated state, the thin wire 3 and the reference frame 1 will be fixed when the temperature is raised to approximately 460°C in the firing furnace. The slack of the thin wire 3 due to the difference in expansion is absorbed by the spring 4, and the linearity of the thin wire 3 is maintained. Moreover, at the maximum temperature of about 450℃, the crystalline glass frit 6
is crystallized and solidified to fix the thin wire 3 and the reference frame 1. When cooled to room temperature in this state, the thin wire 3 and the reference frame 1
Tension is applied to the thin wire 3 due to the difference in thermal expansion coefficient between the thin wire 3 and the thin wire 3, so that the thin wire 3 can be stretched over the reference frame 1 with a predetermined amount of tension.

In this embodiment, it is assumed that the slack due to thermal expansion of the thin wire 3 when the temperature rises is absorbed by the spring 4. A shape memory alloy (for example, a Cu-Zn alloy) may be used which is memorized so that linearity can be ensured in a stretched state. Further, although the crystalline glass frit 5 was used to fix the thin wire 1 and the reference frame when the temperature started to rise, the bonding material changes depending on the setting of the tension amount. This bonding material may be any material as long as it bonds and fixes the reference frame 1 and the thin wire 3 at a set temperature.

Effects of the Invention As described above, the present invention provides the following advantages when stretching a thin wire on a reference frame body.
Selecting a thin wire with a higher coefficient of thermal expansion than the reference frame body, and providing a function to absorb the amount of elongation due to thermal expansion when the thin wire is heated and to maintain it in a tensioned state. By providing a bonding material that joins and fixes the reference frame and the thin wire in a heated state, the thin wire can be created with a predetermined amount of tension after heating and cooling by utilizing the difference in thermal expansion coefficient between the reference frame and the thin wire. It can be stretched over a reference frame and has great practical effects.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a reference frame showing a conventional thin wire stretching method, and FIG. 2 is a perspective view of a reference frame showing a thin wire stretching method in an embodiment of the present invention. 1...Reference frame body, 2...Thin wire fixing bracket, 3
・−・・Thin wire, 4・・Spring, 5・・・
...Glass frit, 6...Base plate, 7
...-support frame, 8...adjustment nut.

Claims (4)

[Claims] (1) Select a thin line with a large coefficient of thermal expansion from the reference frame,
When this thin wire is heated, it absorbs the amount of elongation due to thermal expansion,
Moreover, it has a means for holding the thin wire in a tensioned state, and the thin wire is held in the tensioned state by the means in a heated state, and then the reference frame body and the thin wire are bonded with a bonding material. Zhang method. (2) The reference frame body is ceramic or glass + E'J
2. The method for stretching a thin wire according to claim 1, wherein the J wire is made of a non-magnetic metal material. (3) When heating a thin wire, the means for absorbing the amount of elongation due to thermal expansion and maintaining it in a tensioned state is to increase the temperature of a spring or thin wire provided at both ends or one side of the thin wire. A method for stretching a thin wire according to claim 1, which uses a shape memory alloy that is memorized to have a straight line. (4) The thin wire stretching method according to claim 1, wherein the bonding material is a crystalline glass frit for sealing.