JPH0251691B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the manufacture of metal eyeglass frame parts, that is, metal eyeglass frame parts whose rims, waders, bridges, temples, and eyebrows can be formed into angular cross-sections. It is about the method.

Conventional Technology Conventionally, the manufacturing methods for metal eyeglass frame parts such as rims, temples, bridges, waders, and eyebrows have been very general, with no distinctive features in their cross-sectional shapes, and without much difficulty in processing. In order to increase the strength of the eyeglass frame and give it a distinctive design, there are glasses frame parts that have an angled cross-sectional shape. In order to make this cross-sectional shape into an angular shape, there are two methods: press working, in which each eyeglass frame component is produced one by one by pressing a metal plate many times, and roll working, which is an alternative to the press working method. There is a roll processing method in which a wire rod having an angled cross section that is easy to form, such as an L-shape, a U-shape, or a T-shape, is subjected to bending, pressing, or cutting as necessary.

Problems to be Solved by the Invention The above-mentioned general manufacturing method is easy to process because each of the eyeglass frame parts has a simple cross-sectional shape such as a rod or a plate. Difficulties can be seen in terms of strength, flexibility, resilience, etc.

In addition, among the above-mentioned manufacturing methods for making the cross-sectional shape into an angular shape, those manufactured by press working require a very large number of press processes, which is time-consuming and makes the final product of eyeglass frames expensive. The problem is that it becomes a thing. Similarly, in relation to the method using the above-mentioned roll processing method, which produces an angular cross-sectional shape, general cold rolling technology uses cross-sectional shapes that are easy to form, such as an L-shape, a U-shape, and a T-shape. Apart from this, it is extremely difficult to obtain wire rods with complicated shapes, such as wire rods with cross-sectional shapes such as aluminum sashes, or wire rods with cross-sectional shapes as shown in Figures 3 to 7 of the attached drawings. Even if it were possible to manufacture an eyeglass frame with a cross-sectional shape as complex as this, there would be an extremely large number of processing steps, and the cost of the molds required for each process step would increase, so the number of eyeglass frames manufactured would be limited. If the amount is small, the product becomes very expensive. In addition, the wire rods with L-shaped, U-shaped, and T-shaped cross-sectional angular shapes obtained by the roll processing method do not have their cross-sectional shapes distorted during bending, pressing, or cutting during forming into eyeglass frame parts. There is a problem that cross-sectional deformation such as crushing is likely to occur. There is also a hot rolling method that is mainly used when the metal is iron, but this method does not provide a clean surface finish and is not suitable for manufacturing eyeglass frame parts. Therefore, as a practical matter, it has been impossible to manufacture eyeglass frame parts with complicated cross-sectional shapes using the conventional roll processing method.

The present invention was invented in view of the above-mentioned problems, and it is possible to obtain a wire rod with a complicated cross-sectional shape by rolling a small number of times, and to change the external shape of an eyeglass frame component from the wire after the roll processing. An object of the present invention is to provide a method for manufacturing a metal eyeglass frame component that can be subjected to bending, pressing, and cutting without causing cross-sectional deformation.

Means for Solving the Problems As a means for achieving the above object, the present invention provides a rod-shaped dissimilar metal wire, for example, a nickel silver wire 7, inside a wire made of stainless steel pipe SUS304, which is the metal material of the eyeglass frame 1. The combined wire material obtained by inserting the stainless steel pipe is stretched and rolled, and then a slit 8 extending in the longitudinal direction of the combined wire material is formed to make the stainless steel pipe have an angled cross section. In order to mold the rims 2, 2, watari 3, bridge 4, temple 5, and eyebrows (not shown) into shapes that fit respectively, bending, pressing, and cutting were performed as necessary, and finally this molding was performed. The combined wire rod is acid-treated with 20% nitric acid to dissolve and remove the nickel silver wire 7 to obtain an eyeglass frame component.

Function: During bending, pressing, and cutting to match the external shape of each eyeglass frame component, distortion, crushing, and other deformations do not occur in the cross-sectional shape of the wire, and
By removing the nickel silver wire 7, an eyeglass frame component made of a wire rod having an angled cross section can be easily obtained. In addition, eyeglass frames constructed from eyeglass frame parts obtained in this manner are characterized by excellent strength, flexibility, and restoring force.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the eyeglass frame 1 generally includes rims 2, 2, a rim 3, a bridge 4, and a temple 5. There is also an eyeglass frame 1 in which a cocoon is attached to the upper edge of the rim, but since the cocoon can be manufactured in substantially the same manner as the wading 3, a description thereof will be omitted.

FIGS. 1a to 1d are cross-sectional views of eyeglass frame parts sequentially showing the manufacturing process of the present invention, in which FIG. 1d shows the processing steps for the bridge 4, and FIG. 1d shows the processing steps for the temples 5, 5, respectively.

The processing steps of the present invention will be explained below. In this example, stainless steel pipe SUS304 is used as the wire for the metal eyeglass frame parts, and the outer diameter is 5.0 mm, and the wall thickness is 0.5 mm and 1.0 mm. Each eyeglass frame part is created using two types of pipes. Note that although the two types of pipes have different wall thicknesses, the processing steps are the same, so for the sake of convenience, the two types will be described without distinguishing between them.

(1) The manufacturing process of rim 2 will be explained. (See FIG. 1a) The following steps are sequentially performed on a combined wire formed by inserting a nickel silver wire 7 made of a different metal with an outer diameter matching the inner diameter of the pipe 6 into the inside of the pipe 6.

(First step) Dice processing is performed on the above-mentioned combined wire rod to form a pipe 6.
After drawing the wire until the outer diameter of the wire becomes 3.0 mm, annealing is performed in ammonia decomposition gas at 850 degrees Celsius, a temperature at which the nickel silver wire 7 does not dissolve.

(Second process) The combined wire is further processed with a die to reduce the outer diameter.
After drawing the wire to 2.0 mm, annealing is performed in the same manner as described above.

(Third step) Roll processing is performed to form a cross-sectional shape that matches the rim 2.

(Fourth step) Milling is performed to form slits 8 so as to extend in the longitudinal direction of the combined wire.

(Fifth step) The combined wire rod that has gone through the above steps is pressed, cut into appropriate lengths by cutting, and bent into a spherical shape, which is the external shape of the rim 2 (as shown in the figure). figure).

(Sixth step) Heat treatment is performed for 30 minutes in ammonia decomposition gas at 500° C. to stabilize the molded state of the lens shape (not shown).

(Seventh step) Acid treatment is performed with 20% nitric acid to dissolve and remove the nickel silver wire 7 to create the rim 2.

In this step, if the wire is immersed in acid for a long time, the surface may become rough, but since the 20% nitric acid enters the inside of the wire through the slit 8, the nickel silver wire 7 will be dissolved in a short time and its surface will be roughened. Removal also proceeds quickly through the slit 8.

(2) Explain the processing process of Watari 3. (Figure 1b
) (1st step) Dice processing is performed on the combined wire material constructed in the same manner as in the case of rim 2 above, and the outer diameter of the pipe 6 is 3.0 mm.
After drawing the wire until it becomes , annealing is performed in ammonia decomposition gas at 850 degrees Celsius, a temperature at which the nickel silver wire 7 does not dissolve.

(Second process) The combined wire is further processed with a die to reduce the outer diameter.
After drawing the wire to 2.0 mm, annealing is performed in the same manner as in the case of rim 2 described above.

(Third step) Perform roll processing to create a cross-sectional shape that matches Watari 3.

(Fourth step) Milling is performed to form slits 8 so as to extend in the longitudinal direction of the combined wire.

(Fifth step) The combined wire rod that has gone through the above steps is press-worked to give it an arbitrary external shape, and then cut to an appropriate length by cutting to form a shape that fits Watari 3 (not shown). ).

(Sixth step) Heat treatment is performed for 30 minutes in ammonia decomposition gas at 500 degrees Celsius to stabilize the formed state of the wading 3 (not shown).

(Seventh step) Perform acid treatment with 20% nitric acid to dissolve and remove the nickel silver wire 7 to create the wading 3.

In this step, the melting and removal of the nickel silver wire 7 proceeds through the slit 8 in a short period of time, as in the case of the rim 2 described above.

(3) The machining process of Bridge 4 will be explained. (See Figure 1c) (First step) The combined wire material constructed in the same manner as in the case of the rim 2 above is processed with a die to make the outer diameter of the pipe 6 3.0 mm.
After drawing the wire until it becomes , annealing is performed in ammonia decomposition gas at 850 degrees Celsius, a temperature at which the nickel silver wire 7 does not dissolve.

(Second step) Roll processing is performed to form a cross-sectional shape that matches the bridge 4.

(Third step) Milling is performed to form slits 8 so as to extend in the longitudinal direction of the combined wire.

(Fourth step) The combined wire rod that has gone through the above steps is press-worked to form an arbitrary external shape, and is cut to an appropriate length by cutting to form a shape that fits the bridge 4 (not shown). ).

(Fifth step) Heat treatment is performed for 30 minutes in ammonia decomposition gas at 500 degrees Celsius to stabilize the molded state (not shown).

(Sixth step) Acid treatment is performed using 20% nitric acid to dissolve and remove the nickel silver wire 7 to create the bridge 4.

In this step, the melting and removal of the nickel silver wire 7 proceeds through the slit 8 in a short time, as in the case of the rim 2 and wading 3 described above.

(4) Explain the processing process of temple 5. (See Figure 1 d) (First step) The combined wire material constructed in the same manner as in the case of the rim 2 above is processed with a die so that the outer diameter of the pipe 6 is 3.0 mm.
After drawing the wire until it becomes , annealing is performed in ammonia decomposition gas at 850 degrees Celsius, a temperature at which the nickel silver wire 7 does not dissolve.

(Second step) Roll processing is performed to form a cross-sectional shape that matches the temple 5.

(Third step) Milling is performed to form slits 8 so as to extend in the longitudinal direction of the combined wire.

(Fourth step) The combined wire rod that has gone through the above steps is press-worked to form a desired external shape, and is then cut to an appropriate length by cutting to form a shape that fits the temple 5 (not shown). ).

(Fifth step) Heat treatment is performed for 30 minutes in ammonia decomposition gas at 500 degrees Celsius to stabilize the molded state obtained in the above step (not shown).

(Sixth step) Acid treatment is performed with 20% nitric acid to dissolve and remove the nickel silver wire 7 to create the temple 5.

In this step, the melting and removal of the nickel silver wire 7 proceeds through the slit 8 in a short period of time, as in the case of the rim 2, wading 3, and bridge 4 described above.

The components of the pipe 6, which is a wire material, and the nickel silver wire 7, which is a dissimilar metal, used in the above embodiments are as follows: Pipe 6: Nickel 10.0% to 40.0% Chromium 10.0% to 30.0% Molybdenum 0.5% to 10.0% Iron Residual nickel silver wire 7: Nickel 5.0% to 30.0% Zinc 5.0% to 40.0% Copper The remaining wire material, the pipe 6, is resistant to acid, and the nickel silver wire 7 is easily soluble in acid.
Therefore, during the manufacturing process of the rim 2, watari 3, bridge 4, and temple 5, the nickel silver wire 7, which is a dissimilar metal, is treated with acid as in each final process.
Only that can be removed.

Note that the present invention is not limited to the above-mentioned embodiments. For example, the dissimilar metals are selected depending on the properties of the metal used for the wire, and the removal treatment is performed according to the properties of the dissimilar metals. In addition to acid treatment as in the examples, alkali treatment, heat treatment, mechanical treatment, etc. may be selected as appropriate. The acid treatment is suitable when using acid-resistant gold (or gold alloy), nickel (or nickel alloy), titanium (or titanium alloy) as the wire rod, and acid-resistant wire material such as nickel silver, copper, brass, etc. Used as a dissimilar metal. Alkali treatment is suitable when the metal used for the wire is acid-resistant monel, cupronickel, nickel silver, phosphor bronze, or brass, and alkali-resistant aluminum (or aluminum alloy) or the like is used as the dissimilar metal. Furthermore, in the case of heat treatment, the melting temperature of the dissimilar metal is required to be lower than the melting temperature of the wire. In addition, mechanical treatments include, for example, using a vibrating barrel or ultrasonic waves to loosen the wire and the dissimilar metal, and then extract and remove the dissimilar metal. Even in the case of this mechanical treatment, the presence of the slit 8 makes it easy to remove dissimilar metals.

Effects As explained above, the present invention provides bending processing,
During press working and cutting, the dissimilar metals act as a protector and prevent cross-sectional deformation of the wire rod, and by removing the dissimilar metals, it is easy to obtain eyeglass frame parts made of wire rods with an angled cross-section. Since only a small quantity is required, the product eyeglass frames can be provided at a low price. Further, in the step of removing dissimilar metals, the removal operation can be carried out in a short time through the slit. In addition, the eyeglass frame constructed from the eyeglass frame parts manufactured in this manner has the effect of having excellent strength, flexibility, and restoring force due to the action of the slit.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG.
1 to 1d are cross-sectional views of eyeglass frame parts sequentially showing the manufacturing process of the present invention, and FIG. 1a is a rim,
Figure 1b shows the processing steps for the watari, Figure 1c for the bridge, and Figure 1d for the temple.
The figure is a perspective view of a metal eyeglass frame, and FIGS. 3 to 7 are sectional views of examples of eyeglass frame parts that can be manufactured according to the present invention. 1... Glasses frame, 2... Rim, 3... Watari, 4
...Bridge, 5...Temple, 6...Pipe,
7...nickel silver wire, 8...slit.

Claims (1)

[Claims] 1. A wire of a different type formed into a rod shape using a metal material that can be removed by an appropriate means is inserted into the inside of a wire formed into a pipe shape using a metal material of an eyeglass frame, and expanded into a combined wire rod. After processing and rolling, a slit extending in the longitudinal direction of the combined wire is formed to give the pipe-shaped wire an angled cross section, and then the pipe-like wire is shaped as needed to fit each eyeglass frame component. A method for manufacturing a metal eyeglass frame component, comprising: performing bending, pressing, and cutting in a predetermined order, and then removing the dissimilar metal from the formed combined wire to obtain an eyeglass frame component.