Development Of Automatic Control System For Oil Cooler

With the people’s pursuit of the quality of life, domestic auto industry is booming, and engine oil cooler plays a key role in protecting car engines. It is an important link to improve the assembling efficiency of car engines in automotive production. The pattern of using manual or semi-manual assembling is inefficiency, which can’t meet the rapid development of industrial economy needs and is not suitable for mass production. As the rising labor costs, the product quality can’t not be confirmed, that severely limits the development of enterprises. On the basis of studying a large number of instances of the use of industrial robots, combing with using industrial robots in the assembly industry applications and mechatronics technology, the subject conducts a study about of the automatic assembling control system of an oil cooler to achieve automatically assembling piece tasks and replace manual assembling to improve production efficiency. Then it conducts some related design work.First of all, the working principle of the oil cooler is introduced, the structures and characteristics of the six components in the oil cooler are analyzed in detail, arrangement and grab way of parts are determined. The shortage of the previous structural design of gripper is analyzed, the structure of gripper is redesigned on the base of the analysis. They are ordinary chuck gripper, reinforced gasket gripper and cooling fins gripper. In the design of grippers, vacuum pump is used to be driving source of the three grippers. And its related design calculations are analyzed.According to the requirement of assembling task, the robot’s path is planned, which is a basis for designing automatically assembling system. Then according to the overall program of automatically assembly system of the oil cooler, the course of action of automatic circulation assembling is analyzed in detail. The role of electrical components used in the system is introduced, and the sequence of operation of motors, vacuum pumps, Hall proximity switches, solenoids and relays is assured. The scheme of the control system of the topic is put forward on the basis of the previous scheme.The control system is composed of the hardware and software section, PCL-839stepper motor control card is chose as controller. The motion in the horizontal direction is driven by servo motor, and the motion in the vertical direction is driven by stepper motor. The model of motors, drives and relays are assured. The design of drive circuit for level motor, vertical stepper motors, vacuum pumps, the circuit of electromagnet and control circuit of relay are finished. According to the flow chart of automatic assembly and action analysis, the control program is written with VC++language and function of PCL-839control card. Then human-computer interface is designed, which can control gripper, vacuum pump and electromagnet to work separately or do automatic cycle operation. The interface includes fine-tuning, total stop, single-step stop and automatic reset function. The control system is concise and easy to operate.The aim of test is primarily to verify the reliability and feasibility of the engine oil cooler automatically assembly system which is designed in this paper. It’s able to achieve the desired automatical assembling goals, including the test of the feasibility of the three kinds of grippers. Whether a single gripper can work when pressing a button on man-machine interface. Whether the assembling system starts to assemble automatically in turn when pressing a button "Auto cycle". Experimental result shows that the purpose of these tests can be achieved, the oil cooler automatically assembly system can meet design requirement.