The automatic control of crane on electroplating production line is the key to the automatic control of electroplating production line. The electroplating production line is completed by 4 cranes according to its process requirements, and each crane runs according to its own program. This production line is composed of 32 stations. Station slots 7, 15 and 22 are the exchange station slots of the crane. The station slots included in each crane and the crane process flow each crane is composed of two hooks, namely hook A and hook B. Hook A is the workpiece to be plated, and hook B is used to exchange the workpiece. The crane switches stations. Hook B first lifts the hollow hook in the slot, and then puts the pendant in hook A into the slot, so that it is easy to send the workpiece to the next crane and complete the following process flow. In the process flow of Crane 1, there is a link of chemical degreasing. Due to the long time of chemical degreasing, there is a switching function between tanks A and B.
For example, the non-uniformity of the thickness of the galvanized layer is a problem that cannot be ignored in the manufacturing of threaded fasteners. It is related to the screw joint of the thread and the quality of the coating. Electroplating equipment manufacturer The thickness of the galvanized layer has a great influence on the quality of the galvanized layer, which is mainly reflected in:
(1) The corrosion resistance of zinc coating depends on the coating thickness and exposure environment, Electroplating wastewater treatment equipment The worse the service conditions are, the thicker the coating is required. The corrosion resistance of the entire coating depends on the corrosion resistance of the weakest part of the coating, including the area with the smallest local thickness.
(2) The places where the zinc layer is too thick are prone to defects such as roughness, nodulation and falling off.
(3) Where the zinc layer is too thin, the gloss is poor, dark and foggy, and the bottom is easily exposed in the process of lighting and passivation.
Anodes are divided into soluble anodes and insoluble anodes. Most anodes are soluble anodes corresponding to the coating, such as zinc anode for zinc plating, silver anode for silver plating, and tin lead alloy anode for tin lead alloy plating. However, a few electroplating uses insoluble anodes due to the difficulty of anode dissolution, For example, platinum or titanium anodes are mostly used for acid gold plating. The main salt ions of the plating solution are supplemented by adding the prepared standard gold containing solution. Pure lead, lead tin alloy, lead antimony alloy and other insoluble anodes are used for chromium plating.
No matter from corrosion resistance, appearance, machining performance and other aspects, we hope to improve the uniformity of coating thickness. Hard chromium plating is difficult for parts with precise size requirements. Sometimes users require no grinding treatment after plating; Sometimes, in order to ensure that the thinnest part meets the final size requirements, when the thickness uniformity is poor, the average thickness has to be greatly thickened, which is not uncommon in production. In order to make the thickness of each part of the coating on the workpiece as close as possible, it is necessary to understand the factors that affect the uniformity of thickness distribution. stay Electroplating equipment During the processing, current density and time, temperature, main salt concentration, anode area, bath stirring and other factors will affect the uniformity of coating thickness. Therefore, electroplating plants need to pay more attention to the electroplating process, and strictly control all links in the electroplating process to ensure the stability of workpiece quality and uniformity of coating thickness.
