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Ndfeb production technology introduced _ ndfeb strong magnet manufacturers

by:Newland     2020-04-02
The outer contour of magnets finishing with the centerless grinding machine (commonly Cylindrical magnet) Or surface grinding machine ( The square magnet) Finish, make blank magnets have neat outside profile and geometry size of reach regulations; We use diamond cutting jobs in circular slice machine or wire cutting machine, cutting after finishing the blank of magnet as the shape and size of close to finished product;   Fine grinding process is to cut magnets with surface grinding machine, double-sided grinding machine or other grinding machine will be the size of the magnet, the requirements of the position tolerances of processing to the finished product;             Chamfering is plating pretreatment process, to slow in the electroplating process caused by current density relatively concentrated magnet edge coating thickness is not uniform. Due to the usual sintering Nd - Fe- B the finished magnets have different size, shape, so the free rolling finish the whole process is most suitable for the product mass chamfering processing. Free roll grinding the whole technology are: vibrating roller grinding of consolidation, eddy current type roll grinding spindle roller, centrifugal roll grinding the whole, polishing methods such as whole. Among them, the vibrating roller grinding the high production efficiency, pour the angular velocity is fast, has been widely for sintering Nd - Fe- B magnet processing factory adopted; Plating is to form a protective layer of magnets, the magnet usually adopt barrel plating process to achieve freedom, for larger size magnets, the plating process. Sintering Nd - Fe- B magnets plating depending on the use environment of magnets and cosmetic requirements Ni plating, zinc plating, phosphating, electrophoresis composite plating, alloy plating, etc.   Sintering Nd - Fe- B magnet surface protective layer in addition to the electroplating, and physical vapor deposition ( 周围性血管疾病) Method, physical vapor deposition and evaporation plating, sputtering, ion plating, can form such as Al, zinc, Cr plating; Chemical vapor deposition ( CVD) Can be formed nitride, carbide coating Ti, Cr, etc. In addition, the sintering Nd - Fe- B magnets can also use the surface chemical passivation, electroless plating, hot dip, thermal spraying method so as to obtain a variety of different surface protective layer.   Inspection and test process is the magnet product appearance, size, form and position tolerances of state, coating corrosion resistance, magnetic testing, such as the indicators of the product.   Sintering Nd - Fe- B magnets plating basic process can be roughly divided into the following three stages: & ensp; 一个。   Surface treatment before plating & ensp; Magnet before plating must carry on the oil removal, cleaning, etching, Activation) , cleaning and surface treatment, electroplating before the surface of the magnets to achieve no oil, no scale and rust, etc. , prior to plating the surface condition of magnets directly influence the coating quality of the products.   b。   Electroplating & ensp; After surface treatment of the magnet during electroplating, plating quality mainly depends on factors such as solution formulation and operating conditions. Therefore, in the process of electroplating operations must strictly abide by the process specification, control the ratio of plating solution composition, additives, working parameters such as temperature, current density, and in accordance with the requirements of coating thickness and deposition rate, control the plating time.   c。   Plating post-processing & ensp; Post-processing is also an important part in electroplating plating. Magnet after plating, for example, generally for neutralization treatment and cleaning, sometimes gloss processing ( The light) , passivation and organic coating process to meet the special requirements of the product
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