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Many people are not very familiar with the production process of faucets. Today, let's take a look. The production process of faucets is fundamentally: casting → mechanical processing → polishing → external inspection → electroplating → assembly → water pressure test → product inspection → packaging → leaving the factory.
1. Casting usually refers to the method of making products using molten alloy materials, injecting liquid alloys into pre prepared casting rows, cooling and solidifying them to obtain the required shape and component of the blank or part. Casting can be divided into three types: sand casting, gravity casting, and metal casting; In the process of casting faucets, it is necessary to check the original materials, 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 inexpensive and easy to obtain, and the mold production 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 a mold under the influence of the Earth's gravity, also known as metal casting. It is a modern process of making hollow casting molds for casting using heat-resistant alloy steel.
(3) Metal mold casting: Metal mold casting, also known as hard mold casting, is a casting method that pours liquid metal into the metal mold to obtain castings. Casting is made of metal and can be reused multiple times (hundreds to thousands of times). The castings currently produced by metal mold casting still have certain constraints in terms of quantity and shape, such as only simple shaped castings can be used for black metal; The weight of the casting should not be too large; The wall thickness is also constrained, and smaller castings cannot be produced.
2. Machining: usually refers to the use of metal cutting lathes, milling, drilling, planing, grinding, boring and other machine tools to perform various cutting operations on workpieces, so as to achieve the required dimensional accuracy, shape and orientation accuracy, and meet the requirements of satisfactory drawings. Machining is generally divided into three types: lathes, drilling machines, and milling machines.
(1) Lathe: refers to a machine tool that mainly rotates the workpiece and moves the turning tool as a feed motion to process the rotating surface. Disciplinary actions include: external lathe, horizontal lathe, CNC lathe, etc.
(2) Drilling machine: refers to a machine tool that primarily uses drill bits to process holes on workpieces. Usually, the rotation of the drill bit is the main motion, while the axial movement of the drill bit is the feed motion.
(3) Milling machine: refers to a machine tool that primarily uses milling cutters to process various external surfaces on workpieces. Usually, the rotation motion of the milling cutter is the main motion, while the movement of the workpiece (and) milling cutter is the feed motion.
3. Polishing: The first step is to remove the roughness and potholes on the surface, grind the surface finely, and make it smooth and bright, without sand holes or air holes, with clear and even lines; The work process is the process of processing the surface of a faucet using the high-speed rotation of various grinding heads or hemp wheels of polishing machinery.
4. Electroplating: During the electrolysis process, metal utilizes the effect of electron flow to reduce metal cations in the plating solution to metal elements and deposit them on the surface of cathode plated parts. Electroplated copper has a finer arrangement on the surface, reducing porosity and sealing. Electroplated nickel for increased corrosion resistance and high polishing. Electroplating chromium to prevent corrosion and maintain brightness, improve surface hardness and wear resistance.
5. Assembly: The process of connecting the processed faucet components in a certain order and skill to form a complete set of faucet products, and reliably realizing the functions of product design. A set of faucets is often composed of several parts, and assembly is in the final stage necessary for product production. The quality of the product (from product design, part production to product installation) is ultimately ensured and inspected through installation. Therefore, installation is a crucial link in determining production quality. Developing a reasonable assembly process and adopting effective assembly methods to ensure assembly accuracy are of great significance for ensuring and further improving quality.
6. Factory inspection: Sampling inspection, casting surface, thread surface, appearance quality, installation, marking, valve core sealing test, and faucet sealing performance.