JPS60152364A - Production of spectacle frame - Google Patents

Abstract

PURPOSE:To obtain a spectacle frame having good quality without exfoliation in the brazed part thereof by forming a Cu-coated composed Ti wire by hot hydrostatic extrusion at a specific temp. and annealing the wire then working plastically the wire to a frame shape and temple shape and brazing the same. CONSTITUTION:A composite wire of which the core material is composed essentially of Ti and the sheath material is composed essentially of Cu is formed by hot hydrostatic extrusion at 550-750 deg.C and is annealed under conditions of <=20min at 520-580 deg.C. Such composite wire is plastically worked to the frame shape and temple shape respectively of spectacles and the respective parts are brazed at <=700 deg.C to form a spectacle frame. The formation of the cause for exfoliation in the stage of brazing is eliminated by the annealing treatment of the composite wire in the above-mentioned method, by which the spectacle frame having high joint strength is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing eyeglass frames, and more particularly, the present invention relates to a method for manufacturing eyeglass frames, and in particular, a method for manufacturing eyeglass frames using a composite wire material in which the core material is a metal mainly composed of TI and the outer rim material is a metal mainly composed of Cu. Concerning a new method of manufacturing frames.

T1 is a material with excellent workability, plating properties, etc., and is also lightweight, so it has recently attracted attention as a material for metal eyeglass frames.

However, glasses frames are manufactured by brazing the frames, temples, and other parts, and in this respect Ti is disadvantageous because it has poor brazing properties.

Therefore, a composite wire A2 has been proposed in which Ti is used as a core material and a Cu alloy with excellent low resistance is deposited on the surface of the core material as a cladding material.

However, in this composite wire, a very brittle intermetallic compound (Cu-T) is formed between the core material and the outer sheath material during heating for brazing.
Brazing has a disadvantage in that the strength is low because an i-based diffusion layer is formed.

From this point of view, as disclosed in Japanese Utility Model Publication No. 58-36445, the core material is made of a metal mainly composed of Ti, the surface layer is made of a metal mainly composed of Cu, and the core material The intermediate layer interposed between the surface layer and the T
A TI base wire material for eyeglass frames has been proposed that is made of a metal that does not form a brittle intermetallic compound with i, for example, a Ni layer.

Although this proposed conventional T1 unit BQ for eyeglass frames has certain advantages, it is difficult to manufacture because it is a so-called three-layer (refined), and it is not suitable for foot production. In order to make a laminated eyeglass frame, it is necessary to form a groove for the lens on the eyeglass frame, and to create a flat cross-sectional shape for the temple through Nuaging and Punonu processing, and during this plastic processing, the surface layer becomes thinner. Since no resolution has been made regarding this point,
It was a modern product for eyeglass frames.

In view of the current situation, the present invention provides a so-called two-layer eyeglass frame in which the core material is made of a metal mainly composed of Ti, and the outer layer is made of a metal mainly composed of Cu. Furthermore, there is no intermetallic compound formed or produced between the material and the outer layer, and the outer layer does not become thinner even when plastically processed into the shape of the eyeglass frame. It is an object of the present invention to provide a new method for manufacturing eyeglass frames that is easy to maintain and maintains the required low-chair mounting strength without forming intermetallic compounds. , the core material is a metal mainly composed of T1, and the outer material is a metal mainly composed of Cu, using composite wire obtained by hot isostatic extrusion at 550°C to 750°C. The subject matter is a method of manufacturing an eyeglass frame by forming each part by rolling each component, and the composite wire is heated at 520°C to 580°C prior to plastic processing into the shape of the eyeglass frame and the shape of the horn V. It is characterized in that it is annealed for 20 minutes or less, and then subjected to the above-mentioned plastic working and then rolled at 700°C or less.

FIG. 1 shows an example of glasses (1) having a glasses frame obtained according to the present invention. /l/ pivoted to the glasses frame (3) via
'(51, etc.), and the part of the glasses frame indicated by the symbol (6) is at least row+1 digit.

Referring to FIG. 2, a flowchart of the present invention is shown as an example, in which a composite wire material that becomes the shape of the eyeglass frame is made by hot isostatic extrusion, and this composite wire material is used to form the eyeglass frame and the shape. An eyeglass frame that is at least the same as the above is manufactured by replacing each component with a soldering material.

The process of making the composite wire 1'A by hot isostatic extrusion and the process of plastically working the composite wire 1'A into the shape of an eyeglass frame and rolling it out are a series of steps. Although it is possible to implement it as a process, in the current industrial field 114 construction, the process of making the composite wire side is carried out by a so-called monthly manufacturer, and the process of processing it into the shape of a glasses frame is carried out by a so-called glasses frame processing company. Since these two culms are carried out separately, it is clear that the two culms may be carried out separately.

II, the composite fA rate is 550"0~750°C
Hot static water Inhibition 1; +I is made, and the bonding strength is high.

Therefore, in the second explanation, the method of making the compound wire will be first explained in detail, and then the method of manufacturing the eyeglass frame using the compound wire will be explained in detail.

In Figure 2, there are 2 (~ is an ingot that becomes a thought,
For example, titanium such as I(S5Q, IC870, etc.)
(A) is subjected to a hot forging process (3) and then a machining process (C) such as removal of nucleation and dimension adjustment, and then β treatment p) is not performed to clean the bonding interface. Degreasing process (applied evenly)

10,000, the ingot (A) that becomes the outer material is mainly composed of C11g, for example, 9% Ni - 2,3% So
- The remaining part is Cu and a copper alloy (hereinafter defined as CAC-92), and the ingot (Δ)I has a truncated outer peripheral surface at the tip and is machined into a bottomed sheath shape) After that, a degreasing process (C1' is performed) to clean the bonding interface and prevent interface contamination.

That is, T1 and Cu generally form intermetallic compounds at high temperatures, such as T1Cu, T1Cu3, Ti2Cu, T1
2Cu3, but since this intermetallic compound is brittle and easily destroyed, the composite billet (7) for hot isostatic extrusion is From the time of manufacturing by zero electron beam welding, intermetallic compounds are suppressed and processing is carried out to obtain a composite wire rod with high diffusion bonding strength.

Here, the composite billet (7) has ai shown in FIG.
l < Mil, (8) and the outer wave material (9) are fitted together, and then the outer wave material (9) is fitted with a gear tube (10 is made of the same metal structure as the outer wave material (9)). As shown in FIG.

The composite billet (7), an example of which is shown in Fig. 6, is the 22nd
TerL No. ('') Tere 2107jQ (550℃
-750'c [Engine aK1-1 and M (+82 as a lubricant) was used as a lubricant while coating and drying, while MoS
Figure 2 (I) using a die coated with paste.
By extrusion processing using the thermal aη hydrostatic extrusion method shown in FIG. 9, a composite wire rod in which the interface between the C+i-Ni alloy and the Ti alloy is in a diffusion-bonded state is obtained.

Here, the composite billet (7) is 550'c~75
The head circumference of 0'C was chosen for the following reasons.

The higher the LN degree, the lower the deformation resistance of the billet tool and the shorter the manufacturing process due to high reduction surface processing. However, if the billet is heated to over 800'C and extruded, there will be a brittle intermetallic interface at the contact interface. The upper limit is 750 because compounds are generated.
It is said to be °C. That is, as shown in the 8th step (11+2+), the extrusion temperature was 750.
No formation of intermetallic compounds is observed at °C [Fig. 8 (1)
), whereas at an extrusion temperature of 8[10°C, this is the 8th
This is also clear from the fact that it was observed as shown in Figure (2).

On the other hand, lowering the billet heating humidity is not preferable as a thin wire manufacturing condition because it reduces the extrusion ratio and increases the number of drawing steps after extrusion.
92-Cas is compared to paulownia and 400 has inferior toughness due to mechanical properties.
The lower limit is 550°C to avoid the temperature range of 500°C.
It's 9 degrees Celsius (Figure 9 (1) +21 twilight.

Although the extrusion ratio in hot isostatic extrusion varies depending on the extrusion temperature, it is important to note that the extrusion ratio in hot isostatic extrusion differs depending on the extrusion temperature, but when the billet temperature is set to 600 °C or higher (7
50'C or less), the lower limit can be set to 4 or less, but it can be set to 4 or more as a rough guide.

The composite wire material extruded as 4 g of eyeglass frame material was subjected to a descaling process (J) by pickling as shown in Fig. 2 and a drawing process σ0 by cold drawing, as shown in Fig. 1. Shape of vine (5), vine, frame (3)
Each will be plastically worked into the shape of the drawing.
2), the drawing force per elongation 1] process rate is 10
~20%, and the drawing die affix.

The roach angle is taken into consideration so that the core thickness and the elongation rate of the external wave material are constant, and the wire is drawn without annealing, and the intermediate rIr and blunt wires are omitted.

That is, although the selection of the die angle is usually different for a drawing die for pipes and a drawing die for wire rods, the die angle for wire rods is smaller than that for tubes; a range of 5 to 16 degrees is often used, and also in this invention. Since the object is on the line side, it can be applied in the same way as a regular wire rod.

111, the object of this invention is a metal whose main element is +1 + 1, and a metal whose outer t1 branch and +4 are mainly Cu. 7 and Mega I Roots F3 table (61 light 2 shaku f3 is 9 years old JL, so if you ask the drawer, the signature sword will be attractive 1.1 / IM + 1tlt of
, i3A', s: '+I]j0(iR((S = f') below 20% from the floor.

Using the composite material manufactured as described above, the eyeglass frames are processed through plastic processing, then subjected to plating and other coatings (I), and then final inspection (QK').
However, in order to form the cross-sectional shape of the eyeglass frame, the plastic tool shown in Fig. 6 is processed using a crane (for 51, the swaging process shown in Fig. 2)' is used. /l/ (5A) is broken, and the plastically worked part /l/ shown in Fig. 7 is formed by pressing (to) 1.
(51), and on the other hand, for the eyeglass frame (3), the 1z machining force due to drawing or roll 1TiE stretching is calculated from the 9-bar (3A) shown in Figure 4 by the compound -1!1ii 'I
The lens groove (2N
1-1-1 processing by drawing or rolling or rolling (Fig. 5 shows the processing 1) after IJ. ].

By the way, glasses frame glasses 4'l' +31
, also in Izuhachi of Tsuru (5), +iiJ-mentioned glue 11, Moriguchi no 1 Yuka 11-work is Hisutona 9, and since this is a strong processing, auxiliary processing is required for Machining I 1ii-1.

On the other hand, the collar line side has a two-layer structure as described in 1) II, and considering the process of welding the lower layer by welding, resistance welding, etc. as shown in Figure 2 as a subsequent process, Ti and Cu-Ni are used. It is important to suppress the formation of intermetallic compounds at the bonding interface of the alloy, and it is also important to prevent the thinning of the waveforms associated with plastic working. In order to make the deformation resistance of the outer drum as close as possible and to eliminate interface failure due to slipping of the bonded interface, prior to the plastic processing, a Like 52
It is then subjected to a blunting process at 0°C to 580°C for 20 minutes.

Although the annealing steps are shown separately in FIG. 2 for convenience of explanation and clarity, it is obvious that it is sufficient to anneal the extrusion line joints without performing each step separately.

The reason for specifying the annealing temperature and time in the annealing process (L) (L)' is shown in Figures 10 and 11 F21.
[2+ and FIG. 13 (11+21 will be explained as 1i:j).

That is, if the heat treatment temperature is high, intermetallic compounds will be generated, and the outer F&I in this example is CAC-92.
The core material is KS50, and the temperature range at which both of these soften is 610'C to 620'C. The limit is 5
It is assumed to be 80°C. Immediately, actually (d moreover, 1 grudge is 65
0°C would be fine, but as shown in Figure 13 (11(
7) II < If shown as 2+ When annealing was carried out at 600°C for 20 minutes, as shown in (1) in the same figure.
While no intermetallic compounds were observed at the boundary, when annealing was performed at 630°C for 20 minutes, no intermetallic compounds were observed as shown in Figure (2). The period of time is 20 minutes or less, and 2 to 10 minutes is optimal when taking into account actual operation performance. In consideration of safety, the upper limit of 6m degrees is set at 580 degrees Celsius.

On the other hand, j (S-5
The softening characteristic of 0 is also shown in Figure 11 F21 as Tsukikusugu 11 <
Since the hardness is stabilized above 520'C,
Even when the composite ratio is 60% or more, it is stabilized as shown in Figure 11 (1), so the lower limit of the annealing temperature is 520'.
It is considered to be C.

In addition, the glasses frame element 4 is press-formed into a flat plate from a round wire of 1.5 to 40 mm1, or plastic processing is performed such as f + ~ ¥ processing. A composite wire in which the outer layer is a metal mainly composed of Cu and the outer layer is a metal mainly composed of Cu (in the case of 2, the outer layer is more preferable than thought (because the outer layer tends to become locally thin). There is a significance in heat treatment (intermediate annealing), but the temperature range must be specified and the ratio of external hardening and hardening must be 1.
The annealing temperature was set at 520° C. to make the deformation resistance of T1 and N1-Cu alloy as close to 0 as possible, and to eliminate interface fracture due to all H at the bonding interface [see Figure 10].
The temperature is set at ~580°C, and the time is set at 20 minutes or less.

In addition, such heat death↓11! For the 18th period, the continuous processing rate is 90! An intermediate process of drawing a circle of Z or higher is desirable. Therefore, the compound line A] in this case used as a glasses frame accumulator can be detoured. 2
00 to 220, and 260 to 280 for KS-50.

In this way, prior to plastic working, the material is annealed and processed to form a part of the eyeglass frame.
(5) 1) to form the temples (5) rJ) as an rtlt product of the eyeglass frame, and the parts including these are processed by surface frequency welding, resistance welding, etc. at various locations shown in Fig. 1.
I will be kicked out.

This brazing is done using BAg-4 at a temperature of 6.
00'C, 650'C, 700'C, 750℃, 800
Figure 12 (1)
) to (5) were obtained.

That is, Figure 12 (1) is 600'C, +21 is 650
°C1 (3) is 700°C, (4) is 750'C1 (5)
As is clear from the E P M-A line analysis results of 80D'C (dimension 11 in the same figure, which is shown as a reproduction of an enlarged micrograph), the external material C
AC-92, and Shirai 1 (70 at the interface (5) with S50)
It is clear that no intermetallic compounds are observed at temperatures below 0'C, and at 750°C and 1800'C, the aforementioned compounds at the interface h+c are not observed.

It should be noted that 1 hour of brazing does not pose a problem since the manufacturing of eyeglass frames is a so-called assembly line work and is completed instantly. It will vary depending on selection and workability.

In summary, the present invention provides the following advantages as a method of manufacturing eyeglass frames.

After brazing the frame, the brazing part may peel off during the bending process, which adds strain.
Since this is a problem that occurs after many IT swordsmithing processes have been carried out, the problem of peeling at the lower part is an important issue.

There are two types of this problem: brazing, which has a potential cause of peeling, and brazing, which sometimes causes peeling.

011, due to the extrusion temperature and intermediate annealing conditions, intermetallic compounds are formed in the boundary 1 m, and when cold working is applied, cracks occur because the Ti-Cu intermetallic compounds are hard and brittle, resulting in low f The cracks will develop and become exposed in the post-strain test.

The latter is because intermetallic compounds are generated when the temperature is high during brazing, and cracks occur in the brittle intermetallic compound phase during strain application tests, leading to peeling. Furthermore, since the rowing is a bonding on the surface of the outer sheathing, it does not affect internal interface diffusion, etc., and it is the humidity at the time of rowing that affects the internal interface.

In view of this point of view, the present invention is based on the idea obtained by hot isostatic extrusion at 550°C to 750°C of composite wire as a material for eyeglass frames. Since the peeling is on the side of the composite wire made of a metal mainly composed of Cu, the lowering layer is advantageous in that the cause of the 1m peeling, that is, the potential cause, is excluded from the layer 4J itself.

In addition, we use plastic 1'lEP for eyeglass frames using the above-mentioned materials.
If an intermetallic compound, which is a potential cause, is generated during processing, its significance will be lost, and furthermore,
The local thinning of the lA-treated steel due to plastic working is caused by Lowi 1.
In addition to ensuring the strength of the frame, the problem of deterioration of the decorative function as an eyeglass frame can be solved by annealing at 520'C to 580'C for 20 minutes or less prior to plastic working. Therefore, the generation of prickles during soldering can be eliminated by performing the brazing at a temperature below 700° (lj).
Compared to the five-layer structure achieved by the 14-layer structure (No. 45 Publication), the present invention achieves the objective through temperature control, so to speak, and is able to produce high-quality eyeglass framers while keeping production costs down.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of glasses obtained according to the present invention, FIG. 2 is a flow chart showing an example of the present invention, FIG. 6 is a sectional view showing an example of a composite billet, and FIG. The figure is a sectional view showing an example of downward pressing of the eyeglass frame, and Fig. 5 is the same.
;) A cross-sectional view showing an example of 7-kneeling, Fig. 6 is a perspective view of an example of the Nuwaging Knee of the same crane, Fig. 7 is a perspective view of an example of the same Brenu-kneeling, and Fig. 8 is a section of the composite 4A world. A diagram showing the results,
Figure 9 (11 (2+ is CAC-92 tension test data diagram, Figures 10 and 11 fil +21 is a graph showing the relationship between hardness and annealing conditions, Figures 12 (1) to (5) is an explanatory enlarged cross-sectional view showing the heating temperature and the shape of the interface at the time of injection, Fig. 13 (1).
=1 high 1kIIft, f7kui I: ly also has Z soup (
It is an explanatory diagram showing the autopsy of Akira Takemi. (1)...Glasses, (3)...Glasses frame, (5)
... Vine, (6) ... Brazing is part, CI) ... Hydrostatic extrusion process, 0]σ・)゛ ... Annealing process, Kobane W (he) work" ... Plastic working process , 0 and brazing are processes. Patent applicant: Kobe Steel, Ltd. (and one other person) Fig. 10 , Roasted (
'C) Kesakijran fl ('C) Trial Thorn Seven False C Note wa°
i Sode Masaru Male: [Method] Showa 59 +l: May 1111 1 ・11 I゛l's) = Indication l'1 ((II59 (1 special WliWi21 + 9184 Bow: 1 shot ■1's i'1T'i, Glasses Frame manufacturing 'l+'
4th generation hitter cloud 577 □11J +1111i11V)7. p(4'su++1159!
T”, April 24th 1, ,・,1□ Sakisel

Claims (1)

[Claims] ■ A composite wire material obtained by hot isostatic extrusion at 550°C to 750°C, in which the core material is a metal mainly composed of ′■blind material and the outer sheath material is a metal mainly composed of Cu. The subject is a method of manufacturing an eyeglass frame that includes an eyeglass frame and a temple, and each part is assembled by applying a plastic force of 1 to the eyeglass frame shape and the temple shape, respectively, using a composite wire.
Prior to the first machining, the parts are annealed at 520°C to 580°C for 20 minutes or less, and after that, each part is subjected to plastic pouring of mJ and then roasted at 700'C or less. A method for manufacturing eyeglass frames.