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Many people do not know much about the production process of the faucet. Today, we can learn that the production process of the faucet is basically: casting → machining → polishing → appearance inspection → electroplating → assembly → water pressure test → product inspection → packaging → delivery.
1. Casting, casting usually refers to the method of making products with molten alloy data, injecting liquid alloy into the pre prepared casting line to cool and solidify the blank or part to obtain the required shape and component. Casting can be divided into sand casting, gravity casting and metal casting; In the process of faucet casting, it is necessary to check the original data, pay special attention to the qualification rate of the casting body, and reduce sand holes and water leakage.
(1). Sand casting: Sand casting is a traditional casting process that uses sand as the primary molding material to make molds. Because the molding materials used in sand casting are cheap and easy to obtain, and the mold making is simple, it can adapt to the single piece production, batch production and mass production of castings. For a long time, it has been the fundamental process in casting production.
(2). Gravity casting: refers to the process of injecting molten metal (copper alloy) into the casting mold under the effect of earth gravity, also known as metal casting. It is a modern technology to make hollow casting mould with heat-resistant alloy steel.
(3). Metal mold casting: metal mold casting is also known as hard mold casting, which is a casting method of pouring liquid metal into metal mold to obtain castings. The mold is made of metal and can be reused many times (hundreds to thousands of times). At present, the castings that can be produced by metal mold casting have certain restrictions in terms of weight and shape, for example, the ferrous metal can only be castings with simple shape; The casting weight shall not be too large; The wall thickness is also restricted, and smaller castings cannot be cast.
2. Machining: usually refers to the use of metal cutting lathe, milling, drilling, planing, grinding, boring and other machine tools to perform various cutting operations on the workpiece, so that the workpiece can meet the required dimensional accuracy, shape and orientation accuracy and the requirements of satisfactory drawings. Machining is generally divided into lathe, drilling machine and milling machine.
(1). Lathe: refers to the machine tool that mainly revolves the workpiece, and the lathe tool movement is the feed movement to process the revolving surface. According to the usage, it is classified as: surface lathe, horizontal lathe, CNC lathe, etc.
(2). Drilling machine: refers to the machine tool that mainly uses a drill to process holes on the workpiece. Generally, the drill rotation is the main motion, and the drill axial movement is the feed motion.
(3). Milling machine: refers to the machine tool that mainly uses milling cutter to process various surfaces on the workpiece. Generally, the rotary motion of the milling cutter is the main motion, and the movement of the workpiece (and) milling cutter is the feed motion.
3. Polishing: First of all, remove the rough and pitted surface, and grind the surface to make it smooth and bright, without sand holes and pores, and clear and symmetrical lines; The working process is to use the high-speed rotation of various grinding heads or hemp wheels of the polishing machine to process the surface of the faucet.
4. Electroplating: under the effect of using electron current in the electrolysis process of metal, it is a process in which metal cations in the plating solution are reduced to metal elements and deposited on the surface of cathodic plating pieces. The surface of the plated copper is arranged more carefully, and the pores are cut and sealed. Electroplated nickel, more corrosion resistant, and highly polished. Electroplating chromium to prevent corrosion and keep bright, improve surface hardness and wear resistance.
5. Assembly: The processed faucet parts are connected together according to a certain order and skills to become a complete set of faucet products and reliably realize the process of product design functions. A set of faucets is often composed of several parts. Assembly is at the final stage necessary for the production of products, and the quality of products (from product design, parts production to product installation) is ultimately ensured and checked through installation. Therefore, installation is the key link to determine the production and quality. It is of great significance to develop a reasonable assembly process and adopt an effective assembly method to ensure the assembly accuracy to ensure and further improve the quality.
6. Delivery inspection: sampling inspection, casting appearance, thread appearance, appearance quality, installation, mark, valve core sealing test, and faucet sealing performance.