Electroplating equipment What types of power supplies are commonly used?
There are five types of common power supply for equipment:
1、 DC generator belongs to the early electroplating power supply, which has the advantages of stable power supply and large overload capacity, but it has large energy consumption, low efficiency, large noise and poor economy. Large electroplating workshops are seldom used, and only temporary small electroplating workshops are used.
2、 Rectifier is generally composed of shell, rectifier element, transformer, voltage regulator and cooling equipment. Rectifiers for electroplating include copper oxide rectifier, flattening rectifier, silicon rectifier and thyristor rectifier. At present, silicon rectifier and silicon controlled rectifier are mainly used. Rectifiers are more flexible and lighter than DC generators. It is directly installed beside the electroplating tank to save conductive metal materials. With different circuit structures, different waveforms of DC power supply can be obtained to meet different electroplating requirements. The rectifier has the advantages of high conversion efficiency, convenient adjustment, low noise, no mechanical wear, etc., but poor heat resistance, low impact load, and low power.
Precautions for electroplating and polishing
(1) Take out the wheels to be polished and check whether the surface marks are consistent with the defects (pits, pinholes, missing plating, insufficient brightness, endless wax removal, blistering, peeling, polishing, scorching, poor alignment, bruises, abrasive grains, roughness, deformation, etc.).
(2) According to the flow chart, the production line is operated (referring to the copper blank) (see the production line operation table).
(3) When polishing with grinding wheel, drill wheel or angle grinder, the grinding wheel shall be stable. It is strictly prohibited to use grinding wheel piezoelectric power line to prevent electric shock accidents.
(4) When grinding, first select the sand paper of the required specification, stick it firmly, grasp the wheel with one hand, rotate the wheel with the other hand, and polish it back and forth freely, not too hard, until there is no coating appearance defect.
(5) The cloth drilling wheel needs both hands to polish the air and wax evenly, so that it can gently contact the working face without exerting great pressure and polish at high speed; The price of electroplating equipment should also be based on the shape and size of polished parts, and choose cloth wheels with different sizes and tapers; The main part of the cloth drilling wheel is the included angle between the spoke and the rim (other tools cannot be polished or ground at the proper position, nor can they reach the nickel front). Plating standard) and PCD holes (bolt holes).
(6) When polishing the angle grinder, hold the angle grinder with both hands and wax evenly. The polishing materials leave the wheel surface, rotate the wheel to the polishing part with one hand, and then hold the angle grinder with both hands. The polishing part needs polishing. The polishing machine cannot be overloaded. Do not press the polishing abrasive hard. On the contrary, the polishing abrasive should be evenly waxed, and the polishing abrasive should be slightly dependent on the polishing part, so that the polishing abrasive is easy to enter and exit.
3、 Thyristor power supply is a kind of light electronic circuit for regulating voltage. It is small in size, high in efficiency, easy to control, reliable in quality and not easy to burn. The difference between the thyristor and the ordinary silicon rectifier is that the thyristor has a control pole, which controls the conduction time of the thyristor by adjusting the voltage of the control pole, and then controls the output voltage. There are two main thyristor electroplating power sources in the circuit structure:
1. Thyristors are used to regulate the primary side voltage of power frequency transformers, and polyphase rectification is used at the secondary side.
2. Thyristor voltage regulation rectification is directly adopted at the secondary side of power frequency transformer.
What is the purpose of electroplating equipment? The use of any device has a corresponding purpose to achieve, which is the root cause of device application. For example, electronic electroplating equipment will be applied to the production and processing of electronic products in order to achieve the following purposes.
The first is to improve the protection performance of electronic products: by using electronic electroplating equipment in the production and processing of electronic products, we can think of plating a layer on the surface of electronic products. The use of the coating can improve the wear resistance and corrosion resistance of the workpiece, so that the electroplated electronic products are not easy to contact each other in application. Adverse effects of external factors. From this perspective, the reason for using this equipment in the production and processing of electronic products is to improve the protection performance of electronic products.
The second is to improve the decorative performance of electronic products: the application of electronic electroplating equipment in the production and processing of electronic products can improve the aesthetics of electronic products through the coating required on the surface of electronic products, thus playing a very good role in improving the decorative performance of electronic products. Performance of electronic products. This is also one of the purposes of this kind of equipment in application.
