JPH0471775A - Automatic brazing method and automatic brazing machine used therefor - Google Patents

Abstract

PURPOSE:To automate brazing work by setting a nick on the position of specified length from an end of wire rod for brazing filler metal, fixing this on the specified position of a part, mounting the other part to press-contact this and bringing back the wire rod to a cutter part while energizing and heating this. CONSTITUTION:The nick is set on the wire rod for brazing filler metal by an automatic cutter 3. The wire rod for brazing filler metal is sent to the position of temple material set on a temple positioning jig 8. A hinge is mounted on this by a hinge clamping jig 9 and while press-contacting this, an argon atmosphere is formed and energizing is executed between the clamping jig 9 and the positioning jig 8 and the wire rod for brazing filler metal is brought back. The end of wire rod for brazing wire filler metal of the tip from the nick remains between the hinge and a temple and brazing can be performed. The brazing work can be automated and the accurate automatic brazing work of the spectacle parts can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic brazing method that saves labor in brazing eyeglass parts, and an automatic brazing machine used therein.

[Prior Art and Technical Problems to be Solved] Metal eyeglass frames are extremely popular in Japan, but brazing is essential to manufacturing metal eyeglass frames at low cost.

For example, for the folding mechanism of the temples of glasses, it is cheaper to braze the hinges, and it is done by boat. However, conventional hinge brazing work involves many manual processes, and improvements have been desired.

To briefly explain the conventional clove brazing process, a flat brazed wire is cut into rectangular chips, two brazing chips are temporarily fixed to the joint surfaces of the two joints of the hinge, and this hinge is Using a hinge clamp jig, press onto the temple material that is integrally equipped with the armor piece on the temple positioning jig, so that the joint surfaces of the two hinge pieces are on the armor piece and the temple part, respectively. Then, brazing is performed by applying pressure and heating in an argon gas atmosphere. After this clover brazing work, if the temple part and the armour-edge part of the temple material are separated without cutting the hinge, the temple becomes foldably connected to the armour-edge. By the way, during the above brazing work, the manual parts are listed as follows:
Cutting out wax chips, temporarily fixing wax chips to hinges,
There are four steps: setting the hinge to the hinge crank jig, and setting the temple material to the temple positioning jig. In this way, much of the hinge brazing work relies on manual labor, which, in these days of sharply rising labor costs due to labor shortages, not only increases processing costs, but also causes worker overwork and stress. This led to deterioration of the working environment and made it difficult to secure workers.

Furthermore, the above-mentioned problem similarly exists when brazing eyeglass parts other than hinges, such as bridges, pads, and place bars.

The present invention was made in view of the above-mentioned drawbacks in the conventional brazing work for eyeglass parts.The present invention reduces the manual work in the brazing work for eyeglass parts, reduces the eyeglass processing cost, and , to reduce the burden on workers.
The technical problem is to provide a mechanized brazing method and a machine for use therein.

[Means adopted to solve the problem]

The means adopted by the present inventor to solve the problem are as follows.

That is, the brazed wire is pulled out from the bobbin, and an automatic cutter is used to make a notch at a certain length from the end of the brazed wire.
This brazing wire is sent out and conveyed to the eyeglass parts to be brazed, and the ends of the brazing wire are placed in a predetermined position on one of the eyeglass parts to be brazed to each other, and one eyeglass part remains on the end of the brazing wire. The brazing wire is pulled back to the automatic cutter part while applying electricity and heating between both eyeglass parts, and the brazing wire is cut off at the notch, leaving the end of the brazing wire between the brazing eyeglass parts and the eyeglass part to be brazed. By adopting a method of brazing binocular parts using the end of the brazing wire as a brazing material, a partially mechanized brazing work method for eyeglass parts is provided, and a brazing wire feeding roller assembly that performs the above work is provided. (1.11) By mechanically combining a motor 2, an automatic cutter 3, and a control device 7 that controls these operations, an automatic brazing machine capable of mechanized brazing work of eyeglass parts was provided.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the accompanying drawings. Note that this embodiment describes an automatic brazing method for hinges and an automatic brazing machine used therein.

The automatic brazing machine shown in FIGS. 1 and 2 includes a temple positioning jig 8, a brazing wire feeding roller 1, a driven brazing wire feeding roller 11, a motor 2, an automatic cutter 3, and a front and rear brazing wire guide vibe 4.・4
- Consists of 5.5, brazing wire guide troughs 6.6, and a control device 7 to be described later. The brazing wire feeding roller 1 is belted around a pulley 21 whose drive is transmitted from the motor 2, the driven brazing wire feeding roller 11 is in pressure contact with the brazing wire feeding roller 1, and the front brazing wire guide vibes 4 and 4 are mounted outside the machine. The rear brazing wire guide vibes 5, 5 reach the roller group (1, 11) from the roller group (1, 11).
11), The automatic cutter 3 is connected, and the brazing wire guide troughs 6 and 6 are connected to the automatic cutter 3 and the temple positioning jig 8.
Also, the automatic cutter 3 is connected to the air cylinder 3.
1 and is equipped with a cut stopper that can be finely adjusted with a micrometer to prevent the brazing wire from being cut off during printing, which will be described later.

Next, automatic hinge brazing work is performed as follows.

First, set two sets of flat brazing wire bobbins in the bobbin holder of the brazing wire supply device outside the automatic brazing machine, pull out the brazing wire end from each bobbin, pass it through the front brazing wire guide pipe 4, The brazing wire that is guided between the delivery roller 1 and the driven brazing wire delivery roller 11 has a thickness of 0.
．． It is a flat wire rod with a width of 1-1 and a width of 1-1. The two flat brazing wires are guided by the rear brazing wire guide pipes 5 and 5, sent to the automatic cutter section by roller sets (1 and 11) (see Figure 3), and the ends are cut off by the cutter 3. It has been formatted (
(see Figure 4), and is ready for brazing (see Figure 5).
. The two flat brazing wires waiting to be brazed are sent out by roller sets (1 and 11) and notched by automatic cutter 3 (see Figure 6). After stamping, roller set (1.
At step 11), the brazing wire is further sent out, and guided by the brazing wire guide troughs 6, 6, it reaches the temple material which is set in the temple positioning jig 8 and has an integrally molded armor tip (see Fig. 7). .

When the notched ends of the two brazing wires reach the brazing position on the temple material, feeding is stopped and the brazing wire ends are placed in place. At this time, the brazing positions are the end of the part of the temple material that is to become the armor tip and the end of the part that is to become the temple. A hinge is pressed onto the ends of the two brazing wires using a hinge clamp jig 9, and they are pressed together (see FIG. 8).

At this time, make sure that the two joint surfaces of the hinge are on the respective brazing wires. While continuing pressure welding, fill the brazing work area with argon gas and apply 2V, 140OA electricity between the hinge clamp jig 9 and the temple positioning jig 8.
．． Pass for 5 seconds to heat the brazing wire. At this time, 0.2 seconds after the start of energization, the delivery roller set (1, 11) is reversely driven to pull back the two brazing wires. Then, the end of the brazed wire beyond the notch remains between the hinge and the temple to braze the hinge to the temple, but it is separated at the notch,
The brazing wire behind the notch is pulled back (see Figure 9). In this way, automatic hinge brazing was performed. The two pulled-back brazing wire rods have the separated notches serving as shaped ends, and become brazing wire rods ready for brazing, in preparation for the next brazing process.

In the above, since the operation of the automatic cutter and the feeding and retracting of the brazing wire are controlled by the control device 7, when leaving the brazing material between the hinge and the temple, the position and amount can be accurately controlled by the brazing material device. can do.

To explain this control relationship, first, the motor 2 uses a pulse motor that can be driven intermittently, and the amount of drive per time is accurately determined. The computer 71 controls this drive amount, determines the feed length of the brazing wire, and controls the pulse oscillator 72 connected to the motor 2 so that this feed length is optimized. Since the drive of the motor 2 is controlled as described above, the feed length of the brazing wire rod of the roller 1 is extremely accurate. The computer 71 is also connected to the air cylinder 31 that operates the automatic cutter 3 to control its operation (10th
(see figure).

Although the present embodiment is configured as described above, the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the claims. Especially bridges and pads,
An automatic brazing method for place bars, a brazing machine used therefor, and the like are also included within the scope of the present invention.

[Effects of the present invention]

As described above with reference to the embodiments, the method for automatically brazing eyeglass parts of the present invention involves stamping a brazing wire at a certain position on a brazing wire fed by a roller, feeding it between two eyeglass parts to be brazed, and heating it under pressure. By adopting a method of pulling back the brazing wire while leaving the necessary amount of brazing material between the eyeglass parts, the manual labor that was unavoidable when brazing eyeglass parts was eliminated. With a big exception,
Automate the work. This reduces processing costs associated with brazing eyeglass parts, reduces the burden on workers, and makes it easier to hire new workers. Furthermore, the automatic brazing machine of the present invention is equipped with a control device and can accurately perform automatic brazing work on eyeglass parts.

As described above, the automatic brazing method of the present invention and the automatic brazing machine used therein have great industrial utility value.

1... Brazing wire feeding roller 11... Driven brazing wire feeding roller 2... Motor 21... Pulley 3... Automatic cutter, 31... Air cylinder, 4... Front brazing wire rod guide pipe , 5... Rear brazing wire guide pipe, 6... Brazing wire guide trough, 71... Computer 72... Pulse oscillator, 8... Temple positioning jig, 9... Hinge clamp jig .

Patent applicant: Hamamoto Technical Co., Ltd. Agent Patent Attorney Koji Kawa

[Brief explanation of the drawing]

1 and 2 are a side view and a plan view of the automatic brazing machine of this embodiment. 3 to 9 are explanatory diagrams of the process of automatic hinge brazing in this embodiment. FIG. 10 is a block diagram illustrating the control relationship of the control device of the automatic brazing machine of this embodiment. Fig. 6 Fig. 3IW 711 Fig. 4 Fig. 8 Fig. 5 Fig. 9 Fig. 1... Brazing wire feeding roller 3... Automatic cutter 4... Front brazing wire guide vibe 5 - Rear brazing wire guide pipe 8 - Temple Positioning jig 11... Driven brazing wire feeding roller 31 - 7 cylinders

Claims (2)

[Claims] (1) A cutter automatically makes a notch at a certain length from the end of the brazing wire wound around the bobbin, and this brazing wire is sent out and conveyed in parallel to a predetermined position on one of the eyeglass parts to be brazed to each other. The notched end of the brazing wire is placed in place, and the remaining brazing eyeglass component is placed on the end of the brazing wire on the brazing eyeglass component and pressed together, and electricity is applied between both eyeglass components. By pulling the brazing wire back to the cutter part while heating, it was separated from the notch and the end of the wire beyond the notch was left between the eyeglass parts, and the eyeglass parts were brazed together using the left end of the brazing wire. An automatic brazing method characterized by: (2) It has a brazing wire feeding roller set (1, 11) that pulls out and conveys the brazing wire wound around the bobbin from the bobbin, or pulls back the fed brazing wire, and the brazing wire feeding roller group (1, 11) It has an automatic cutter 3 that makes notches in the brazing wire fed out by the brazing wire feed rollers 1 and 11, and controls the operation timing of the automatic cutter 3, and controls the normal rotation of the motor 2. An automatic brazing machine characterized by having a control device 7 that controls the feed length of the brazing wire feed roller set (1, 11) by controlling reversal.