Method for cladding watch bezel with gold

Abstract

The invention discloses a method for cladding a watch bezel with gold. The method comprises the following steps: (1) machining a gold plate to obtain a thin gold sheet for later use; (2) using an oilpressure die to make the thin gold sheet into a semi-finished gold ring matching a workpiece to be cladded with gold in shape; (3) using a laser machine to sweep the outer surface of the workpiece tobe cladded with gold to engrave reticular grooves and filling the grooves with silver solder paste; (4) using the semi-finished gold ring to sleeve the workpiece to be cladded with gold and performingpre-press forming; (5) placing the pre-pressed product in a pressure die and putting the pressure die into a nitriding furnace for welding; and (6) subjecting the product treated by the nitriding furnace to natural cooling, taking out the product and performing finish turning, polishing and cleaning to obtain a watch bezel cladded with gold. By designing the reticular grooves on the surface of the workpiece to be machined as well as using the silver solder paste for filling and then welding, the method can effectively avoid phenomena such as silver spillover, pseudo soldering and unsolderingand no new concave positions can appear during the post machining.

Description

technical field [0001] The invention relates to the field of metal pressure processing and mechanical processing, in particular to a method for coating gold on the bezel of a watch. Background technique [0002] With the continuous improvement of people's living standards and art appreciation levels, watches are no longer just a tool for displaying time, but have become a kind of noble and elegant, and can play a certain role in decoration and value display. In order to enable watches to meet the different needs and attributes of consumers, watches with precious metal appearance parts have appeared on the market. [0003] At present, the existing products on the market mainly include gold-clad products and gold-plated products. Gold-plated products use the principle of electrolysis to coat a layer of gold film on the surface of the metal substrate, generally 0.7-1.0 microns, and the metal substrate is mostly copper, silver, and zinc. , nickel or its alloys, which are charac...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing products on the market mainly include gold-clad products and gold-plated products. Gold-plated products use the principle of electrolysis to coat a layer of gold film on the surface of the metal substrate, generally 0.7-1.0 microns, and the metal substrate is mostly copper, silver, and zinc. , nickel or its alloys, which are characterized by extremely thin gold layer, convenient plating, low cost, and certain decorative effects, but because the extremely thin gold layer is easily worn off or the coating falls off, it cannot be maintained for a long time. Golden appearance, and easy to be corroded and discolored in air oxidation and sweat stains

The gold-coated product is to first press out the gold sheet according to the thickness of the workpiece, make a concave position on the workpiece, apply silver powder solder in the concave position, paste the gold sheet, beat and compact it, and then pass it through the nitriding furnace. High-temperature melting silver welding, this process method has the following disadvantages: ①Silver powder solder is prone to overflowing silver during the furnace welding process; ②The pasted gold sheet is prone to dents and cracks in the appearance during turning and polishing processes; ③After the finished product is completed When reassembling, if encountering external force, a new concave position will appear, and the product qualification rate is low