Bridge crane and method for reducing carry-over quantity of vertical gold wire and gold-plated wire workpiece

Abstract

The invention relates to a bridge crane and a method for reducing carry-over quantity of a vertical gold wire and a gold-plated wire workpiece. The bridge crane is connected with a sideway motor on one end of a body supporting arm, wherein the other end of the body supporting arm is connected with a lifting motor; the lifting motor is connected with an upward lifting soft arm; the lifting soft arm is in parallel fixed together with a lifting beam; a crane is arranged below the lifting beam; and vibration motors are further arranged on the lifting beam; the method comprises the following steps: lifting a plated workpiece fixed on the crane by the lifting beam; stopping the operation of the lifting motor when the plated workpiece leaves liquid medicine surface in a slot; starting the vibration motors installed on the lifting beam; vibrating and dropping much residual liquid medicine on the workpiece to the liquid medicine; and stopping the operation of the vibrator motors. According to the invention, a group of vibration motors are additionally arranged on the crane, and stepped standstill is matched with vibration, so that the liquid medicine, which cannot be dropped to the slot depending the gravity thereof, on the workpiece can be dropped to the slot, thereby reducing carry-over waste and loss. The vibration motor is directly controlled by a PLC (Programmable Logic Controller) program without being operated by staffs.

Description

technical field [0001] The invention relates to a bridge crane in the Printed circuit board (hereinafter referred to as PCB) industry and a method for reducing the amount of vertical gold wires and gold-plated wire workpieces carried out, and belongs to the technical field of vertical electroplated gold wires and vertical chemical gold wires. Background technique [0002] In the precision circuit board industry, it is necessary to plate a film with solderability or wear resistance on the pad specified by the customer by chemical or electroplating methods. The chemical nickel-gold process and the electroplating nickel-gold process are two of them. The chemical nickel gold and electroplated nickel gold use vertical lines, and the principle is basically the same, that is, put the workpiece to be plated into a special basket or electroplating fixture, and then fix the basket or electroplating fixture on the flybar , and finally rely on the PLC to control the automatic operation ...

AI Technical Summary

Problems solved by technology

[0003] The nickel tank and gold tank of chemical nickel gold and electroplated nickel gold belong to the aqueous solution containing precious metal ions. When the workpiece is lifted from one station and transferred to the next station, a large amount of liquid medicine will be brought out, and a lot of liquid medicine will be brought out. Not only will it pollute the environment, but it will also cause waste of cost. At the same time, the liquid medicine brought out needs a lot of water to rinse and dilute. The higher the brought out, the higher the washing amount

Taking a workpiece of 3 square feet as an example, the amount of the potion brought out is about 8mL. If the gold content in the chemical gold potion is 1g / L, if 6000 parts are produced every day as an example, it will bring out 8mL / 1000* 1g / L*6000 workpieces=48g pure gold, since the brought out has been recycled as waste, it cannot be reused, resulting in a lot of waste

[0004] In order to reduce the amount of carrying out, the current common practice is to stop for a period of time when the workpiece is lifted out of the tank when the bridge crane is in the upper position, so that the liquid drops back into the tank, but the quality will be abnormal due to the long stay , the general time should not exceed 30s

Due to relying on the gravity of the potion itself to overcome the surface tension of the potion to make the potion drip, after 30s, there will be a considerable part of the potion gravity that cannot overcome its surface tension, and the potion is still taken out in large quantities. At the same time, the potion on the horizontal surface of the workpiece and in the hole Due to the effect of surface tension, it cannot fall back into the plating tank

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