Design Control System of Washing Oil Pan Machine Based on PLC in the Automotive Manufacturing Industry

This paper presents research that conducted in the automotive manufacturing industry, in Indonesia. Production process part oil pan of car is consisting of several machining processes, namely CNC OP1 (feeding of the upper surface), CNC OP2 (feeding side surface), CNC OP3 (feeding of the under surface), CNC OP4 (Tapping), washing part, Leak test part, Rivet, All check. The process of washing is the process of cleaning part of dust or chips on the part by spraying water and wind. But the results of washing process still get the claim of the customer because the part is still dirty. Therefore, the wind spraying has done manually by operator. The manual process of spraying has extended cycle time. It is not in accordance with the policy of the Industry to lower production costs by reducing cycle time and zero claims. Then it needed a machine that can produce the parts clean and dry so there is no spraying process manually by the operator. Therefore, we designed the final assignment of washing oil pan machine using the PLC (Programmable Logic Controller) are in communicate with mist collect, so by using the mist collect can prevent the steam back into water and dripping to the part that is already dry and littering the part. By using this new washing machine works efficiency increase, because the process of spraying the wind manually can be removed and the cycle time down by 65.4 from originally 100.4 seconds to 35 seconds.