The Application of Sequential Analysis Method in Preventing and Controlling Electroplating Problems

The collection, classification, and coding of original fault data. In order to conduct statistical analysis of faults, it is necessary to collect a large amount of reliable first-hand fault record data. Faults should be recorded in a timely manner, and there should be detailed records of the analysis of fault causes, fault handling, and results. The production diary of the electroplating workshop and the electroplating technical service report truthfully filled out in work are ideal data for fault information.

In practical work, electroplating faults are diverse. In order to scientifically analyze faults, it is necessary to classify and code them as needed. Generally, faults can be divided into electroplating equipment faults, raw material faults, pre plating treatment faults, electroplating process faults, and post plating treatment faults according to the process. They are represented by the letters B, C, D, E, and F respectively, and are numbered according to the fault point, with corner marks. Divide the causes of faults into two categories: equipment failure and human error, denoted by adding 1 and 2 to the corner of the letter O. Then code the faults according to their classification and the order of their causes. For example, a scratch on a household appliance plating part in a certain factory is caused by a lack of relevant knowledge (O2.3) and untrained work experience (O2.1) by a new worker during transportation (F3). The code for this fault is F3O2.1O2.3. For example, the plating part blisters because the substrate of the plating part is rough and substandard (C1), the director did not inspect it during pre plating treatment (O2.1), the polishing is substandard (D2), and the plating time is too short (E12). The fault code is C1D2E12O2.1

The statistics and analysis of fault data can be carried out as needed. A comprehensive analysis of the fault can be conducted according to. The following is an example of 10 electroplating failures that occurred in a certain electroplating factory in the fourth quarter of 2005.

The application of classification analysis method in preventing and controlling electroplating faults. Fault classification and coding. Fault classification symbols. Fault points are numbered according to production process electroplating equipment faults. B Workshop 1, plating tank 2, distribution 3, lighting 4, ventilation 5, filtration 6, stirring 6, power 7 and other raw material faults. C Electroplating substrate material 1 Electroplating raw material anode 2, acid 3, alkali 4, salt 5, water 6, additive 7 and other pre plating treatment faults. D Polishing 1, polishing 2, oil removal 3 Activation 4 electroplating process failure E: quantity of raw materials 1, proportion of electroplating solution 2, concentration 3, temperature 4, pH5, concentration of impurities 6, brightener 7, stirring 8, filtration 9, current 10, voltage 11, electroplating time 12, auxiliary cathode 13, hanging device 14, etc. Post-plating treatment failure F cleaning 1, drying 2, transportation 3, packaging 4, etc. Equipment failure O1 is caused by equipment failure O1 under mature electroplating process conditions and normal maintenance of electroplating equipment, Due to equipment itself, such as wear, corrosion, and fatigue of vulnerable parts or certain transmission components, O1 human error, O2 inadequate process standards and regulations, lack of inspection and supervision, poor management of electroplating equipment and electroplating process parameters, hidden causes that are not considered belong to congenital faults 2.2 Lack of relevant knowledge, violation of operating norms and equipment maintenance regulations

Special analysis can also be conducted as needed. If special analysis is conducted on item E in, electroplating workers can be obtained