KR0145392B1 - Watch case making method - Google Patents

Abstract

The present invention relates to the provision of a watch case with a gold plate adhered to the upper surface of the main body of the watch case or the upper surface of both side band connecting portions for connecting the watch band and a method of manufacturing the same, extending the decorative effect of the surface of the watch case to golden color for a long time. In order to be able to make it possible, as a non-oxidizing heat treatment, a gold plate having a predetermined thickness is melted at a temperature of 600 ° C. to 850 ° C. on the upper surface of the watch case or the upper surface of the band connection part without gold plating the case. After strong bonding, it can be completed by forging and turning process. As the golden color formed on the upper surface of the watch case and the upper side of the band connection part is bonded to the gold plate, the golden color may be peeled off or discolored even if worn for a long time. To make the decorative effect of the watch case more permanent. Is a creation aims.

Description

Manufacturing method of watch case with gold plate

1 and 2 is a flow chart of the watch case manufacturing process bonded gold plate according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: Gold plate 2,2 ': Blanked gold plate

3: Pierced gold plate 4, 4 ': watch case body

5,5 ': Band connection 6: Ring groove

6 ': single layer 7,7': gold welding agent

8 ': spot welding 9': saddle

The present invention relates to a method of manufacturing a watch case in which a gold plate is attached to an upper surface of a main body of a watch case or an upper surface of both side band connecting portions for connecting a watch band.

In more detail, in order to extend the decorative effect of the watch case to a golden color, a gold plate having a predetermined thickness without the gold plating of the watch case as in the conventional case may be 600 ° C. It is strongly bonded by anodizing heat treatment using a welding agent that is melted at a temperature of 850 ℃, and then completed by forging and turning. As such, the golden color formed on the upper surface of the watch case and the upper surface of both band connection parts is bonded to the gold plate. Therefore, even if worn for a long time, there is no fear of peeling or discoloring the golden color, so that the decorative effect of the watch case can be more permanently created.

In general, high-end watch cases were made of gold or the combination of gold and stainless steel.

However, in the former case, the watch case itself is not made of gold, and the entire case of the watch is golden by using a gold plating method. The gold plating is so thin that the plating thickness is generally 3 to 10 microns. When worn for about 1 year 6 months to 3 years, the gold-plated layer is partially removed or peeled off, which not only reduces the dignity of the luxury watch but also impedes the decorative effect. There was a drawback defect, the latter being a part combined with a stainless steel material, for example; Since the watch case body or the band connection itself must be made of gold, there is a problem that the manufacturing cost is extremely expensive, which imposes an increased economic burden on the consumer and is not practical.

Therefore, in view of the above-mentioned matters, the present invention provides a watch case having a golden color in order to contribute to practical use by providing a watch case having a combination shape of stainless steel and gold material to a consumer at a lower price. In one embodiment, the watch case body and the band connection part are made of stainless steel material integrally, and then welded with a gold plate on the upper surface of the watch case body, followed by mechanical means such as forging and turning or grinding and polishing. The purpose of the present invention is to provide a high quality watch case with golden color by attaching the gold plate to the upper surface of the stainless steel watch case without gaps and by attaching the gold plate to the upper surface of the band connection unit formed integrally on both sides of the watch case. The gold plate attached to the watch case like this It is possible to provide a watch case with a prolonged service life without a case of golden peeling or discoloration as compared with the gold plating method of the metal plating method, and a watch case having a combination shape of stainless steel and gold plate as a cheaper manufacturing cost. It can be provided to consumers.

Hereinafter, the present invention will be described according to each embodiment applied to the watch case body and the band connection unit.

Example 1

(A) to (g) of FIG. 1 is an embodiment in which a gold plate is adhered to an upper surface of a watch case having a circular or quadrangular shape. In this embodiment, a circular shape manufactured as a stainless steel material is shown. It is an example to bond the gold plate on the upper surface of the watch case body.

1) Gold plate blanking process

The above process is a step of blanking a round plate according to the design so as to be bonded to the upper surface of the watch case by using a very thin gold plate 1 (see FIG. One side of the outer diameter of the blanked gold plate 2 was made to protrude slightly (see also (b) of FIG. 1).

2) gold plate piercing process

The process is a process of piercing the inner diameter of the blanked gold plate (2) made in a regular gold plate blanking process in a ring shape according to the design to make a gold plate (3), wherein the inner diameter of the pierced gold plate is an electric blanking process Irrespective of the projecting portion of the outer diameter formed in the piercing process to achieve the same shape as the inner diameter of the upper surface of the watch case.

On the other hand, in the piercing step of the gold plate, it is preferable that the bending process is also performed so that the gold plate 3 having the internal diameter pierced has a desired shape. For example, since the upper surface of the watch case is generally inclined downward from the inner diameter portion to the outer diameter portion, accordingly, the bending processing method that is performed along with the piercing process causes the inner diameter portion of the pierced gold plate 3 to be high and the outer diameter portion to be lowered. Banding is performed (see also (c) of FIG. 1).

3) Blanking process of watch case body

The process is a process of blanking the shape of the watch case body 4 to make a stainless steel sheet according to the design, this process is a process of forming the band connecting portion 5 together, the band connecting portion 5 Can be made into various shapes depending on the combination of watch bands (not shown) (see also (d) in FIG. 1).

4) Seating process on top of watch case body

The process is a process of making a ring groove 6 for adhering the pierced gold plate 3 made in a ring shape in the electrical gold plate piercing process on the upper surface of the watch case body 4, the ring groove 6 is a forging process means or It is made by means of lathe processing. At this time, the bottom surface of the ring groove 6 is processed so that the pierced gold plate 3 together with the bending process can be inserted and seated tightly without any gap (see also (e) in FIG. 1).

5) Primary bonding process of watch case body and gold plate

The process is a step of adhering the gold plate 3 pierced to the ring groove 6 formed on the upper surface of the watch case 4, this step is a melting point of 600 ℃ to 800 ℃ to the ring groove 6 of the watch case (4) Evenly spray the nickel or gold welding agent (7) having the same and then insert the gluing plate (3) pierced into the ring groove (6), the insertion method using a mechanical pressing means or a hand press using an oil, pneumatic press Insert and compress by artificial crimping means (see also (f) of FIG. 1).

6) Secondary bonding process between watch case body and gold plate

The process is the next step of eliminating gaps between the pierced gold plate and the ring groove rim by forging the upper surface of the watch case body 4 and the pierced gold plate 3 which have undergone the aforementioned first bonding process. This is a pre-adhesive process that allows the gold welding agent 7 to be strongly adhered without any exposure to the outside during the heat treatment process. Forging the inner, outer edges or pierced gold plate of the ring groove forming the upper surface of the watch case and the ring groove and Forging is done several times to fill the gap between the gaps. After one forging, the gap is annealed to the set temperature (below 600 ℃) and repeated forging is completed. It is a process of elimination.

7) Oxidation-free welding process of watch case body and gold plate

In the above process, the material subjected to the above-mentioned second bonding process is put into an anoxic heat treatment furnace at a temperature of 600 ° C. to 800 ° C., and the gold plate 3 pierced by melting the gold welding agent 7 sprayed on the ring groove is watch case body ( 4) It is an oxidation-free welding process that welds to the case. In case of melting and bonding the gold welding agent by the oxidation-free heat treatment welding method, the watch case and the gold plate are not oxidized and only the gold welding agent is melted and inserted into the ring groove of the watch case body. The gold plate is welded and bonded. Also, since the gap is completely removed in the secondary bonding process of electricity, there is no leakage of gold weld. Therefore, the welding and bonding state is more perfect. Are glued together.

8) Final forging process

It is a process to make the bonding state more precise so that there is no gap between the ring groove and the gold plate by strengthening the surface strength by forging the upper surface of the watch case body, the material which has undergone the electric oxidation welding process, and the surface of the ring groove and the gold plate.

9) Turning process

The process is to remove the burrs generated by the forging process on the upper surface of the material after the final forging process by turning using a workpiece such as a lathe, the watch case body after such a turning process Then, the gold plate bonded in a mixed state is completed in a combi-shaped watch case by a resonance process which is the next step, the surface is processed smoothly and smoothly.

The next resonant process is a process of drilling a pin hole for connecting the watch band to the head part and the band connecting part where the time adjustment knob is installed on the watch case body which has undergone surface turning, and this process is the same as the existing resonance process. Therefore, detailed description will be omitted.

Example 2

(A) to (h) of Figure 2 is an embodiment in which the gold plate is bonded to the upper surface of the watch band connecting portion formed on both sides of the stainless steel watch case body, in this embodiment the watch case is a rectangular shape Although shown, it can be applied to the band connection of the watch case of various shapes such as circular and polygonal shapes.

1) Gold plate blanking process

The process is a process for producing a blanked gold plate (2 ') from the thin plate of gold plate material (not shown) in accordance with the shape and dimensions of the band connecting portion formed on both sides of the watch case body.

2) Blanking process of watch case body

The process is a process of blanking the shape of the watch case body 4 'to be made of stainless steel sheet according to the design, this process is also a process of forming a band connection portion 5' with a bar connection portion ( 5 ') can be made into various shapes according to the coupling configuration of the shige band (not shown) (see also FIG. 1 (a)).

3) Seating process of band connection part

In the above process, each of the band connection portions 5 'integrally formed on both sides of the watch case body made in the above-described process is forged or milled, and the single-sided surface 6' whose thickness is lowered by the thickness of the gold plate 2 'with the upper surface blanked. (See also (b) and (c) of FIG. 2).

4) Gold plate pre-welding process

The process is to deposit a blank plated gold plate (2 ') on a single layer (6') placed on the upper surface of the band connecting portion (5 ') and then spot welded (8'), this process is each band connecting portion (5) In order to fix the blanked gold plate 2 'seated on the fault surface 6' of '), spot welding (8') of several spots on the outer circumferential surface of their joints is performed (see also (d) in FIG. 2). )

5) Oxidation-free welding process of band connection part and gold plate

The process is to complete the welding by using a gold welding agent 7 made of nickel powder having a melting point of 600 ° C. to 800 ° C., etc., by fixing the gold plate 2 'fixed by the preliminary welding process. (5 ') and evenly glued the gold welding agent (7') to the outer periphery of the junction between the gold plate (2 ') and put it in an oxidation-free heat treatment furnace having a temperature of 600 ℃ ~ 800 ℃. As the 7 ') is melted, the band connection part and the adhesive gold plate are welded as if they are integrated by welding the joint portions of the band connection part 5' and the gold plate 2 '. On the other hand, in the process of melting and welding the gold welding agent without oxidation, the band connection part and the blanked gold plate are not oxidized, so that the watch case itself and the gold plate are not damaged (see also (e) in FIG. 2). )

6) Final Blanking Process

The process is a process of blanking the material after the oxidation-free welding process according to the design dimensions, the material is put into this process to form a single layer (6 ') in the band connection, pre-welding process and acid-free During the fire welding process, burrs are formed on the outer circumferential surface of the watch case body and the band connection part and are removed using a blanking mold or a grinding machine (see also FIG. 2 (f)).

7) Shape Forging Process

The process is forging the watch case body 4 'and the band connecting portion 5' through the final blanking process in the forging die, and the desired shape, for example, the thickness of the middle part of the watch case is high. It is thick and forging is made so that the thickness becomes thinner and lowered toward the end of both band connecting portions. At this time, the thinning portion is formed with a beetle 9 '(see also (g) in FIG. 2).

8) Exfoliation Process

The process is a process for removing the debris (9 ') generated in the shape forging process of the electric, this process is a method of polishing the debris removal after removing the debris by using the debris removal mold as in the final blanking process A process of smoothing the surface and outer circumferential surface of the watch case, which is a process of finishing the manufacture of the watch case itself (see also FIG. 2 (h)). Afterwards, as a resonance process, one of the central parts of the watch case body has a crown head for installing the time adjustment knob, and a band-shaped connection case has a combi-shaped watch case in which a gold plate is bonded to the stainless steel watch case. It is made.

[Example 1] and [Example 2] of the present invention as described above is made of a watch case made of stainless steel, the production method with the gold plate embedded in the upper surface of the watch case body or welded to the upper surface of the band connection portion Compared to conventional gold plate bonding, the gold plate can be more strongly bonded and the gold plate has a certain thickness. Therefore, the gold plate can be preserved golden color. Significantly extends the decorative effect and at the same time the manufacturing cost is inexpensive and can be useful for practical use.

In addition, in each embodiment of the present invention, the method of adhering the gold plate to the upper surface of the watch case body and the upper surface of the band connection part is explained separately, but the gold plate is adhered to the watch case body and the gold plate is bonded to the band connection part. In addition, the present invention is not limited to the watch case of the circular shape and the rectangular shape as in the above-described embodiment is applicable equally to all watch cases made of stainless steel.

Claims (3)

Forming a ring groove on an upper surface of the main body of the watch case; Make a gold plate blanked and pierced to fit the ring groove, and evenly spray the gold welding agent having a melting point of 600 ℃ to 800 ℃ temperature in the ring groove, and then insert the gold plate into the ring groove and then press the ring groove and the gold plate Forging process so that there is no gap between; Injecting the material subjected to the above process into an oxidation-free heat treatment furnace at a temperature of 600 ° C. to 800 ° C. to melt the gold welding agent so that the gold plate is welded in the ring groove of the watch case body; Method of manufacturing a watch case is bonded gold plate, characterized in that consisting of. The method of claim 1, further comprising: a gold plate blanking step of obtaining a thin plate material having a thin thickness according to the shape of the watch case body; A gold plate piercing step of obtaining an inner diameter of the blanked gold plate material subjected to the above process; A watch case body blanking process of making a watch case body in a conventional manner with a stainless steel material; A positioning step of an upper surface of the watch case body which forms a ring groove on the watch case body upper surface made by the above process; A primary bonding process of the watch case body and the gold plate, which are evenly sprayed with a gold welding agent having a melting point of 600 ° C. to 800 ° C. in the ring groove formed in the process, and then inserted by inserting the pierced gold plate into the ring groove; A secondary bonding process between the watch case body and the gold plate forging the upper surface of the material subjected to the above process and then filling the gap between the edge of the ring groove of the watch case body and the gold plate inserted into the ring groove by annealing heat treatment; Oxidation-free welding process of the watch case body and the gold plate to insert the material filled in the gap into the oxidation-free heat treatment furnace of 600 ℃ to 800 ℃ temperature to weld the gold plate while melting the gold welding sprayed on the ring groove; A final forging step of forging the material which has been subjected to the above step to fill the gap between the edge of the ring groove and the gold plate constituting the upper surface of the watch case and strengthening the surface thereof; A turning step of removing burrs and the like by turning the upper surface of the material which has been subjected to the above steps; Method for producing a watch case is bonded gold plate, characterized in that consisting of. A gold plate blanking step of extracting a gold plate to be bonded from the gold plate material according to the shape and dimensions of the band connection part formed at both sides of the watch case body; A watch case body blanking process of producing a watch case as a stainless steel material; A band connecting part positioning step of processing a single layer surface to be monolayered by the thickness of the gold plate by forging or milling the upper surfaces of the band connecting parts formed on both sides of the watch case body made in the above process; A gold plate preliminary welding step of seating the blanked gold plate on the tomographic layer formed by the above process and fixing it by spot welding; The gold welding agent having melting point of 600 ℃ ~ 800 ℃ is evenly applied to the junction between the single layer surface of the material and the gold plate which has been processed above, and it is put into the oxidation-free heat treatment furnace at 600 ℃ ~ 800 ℃ to melt the gold welding agent. Oxidation-free welding process of a band connection part and a gold plate which weld a gold plate in the integrated state to the single-layered surface of a band connection part; Final blanking process for removing burrs generated during anodized welding with a blanking mold of the raw material; and forging a shape of a watch case to be manufactured by forging the raw material with the forging die. Process; A gout removing step of removing gout formed on the outer periphery of the material which has undergone the above process; Method of manufacturing a gold plate is bonded watch case, characterized in that the gold plate made of a watch case bonded to the band connection portion.