The Study Of Automatic Tool Changer & Tool Control

With the development of NC, the automatic tool changer system is more and more important in the modern advanced manufacture, because the ATC can shorten the cycle time of product manufacturing, improve the precision of product machining. The latest requirements of machine tool user comprise of diversification of control object, complexity of process, flexible of application and high reliability. The function of tool magazine is that stores the tool and moves the tool which will be used in the next manufacturing process to the right changeover position and robot will finish the change over tool.When the tool magazine's capacity is so big and the distance of tool position is more far away the principal axis, there need the tool exchanging unit to implement the changeover work between the principal axis and tool magazine. The framework of this function include the robot, tools rotation station and changeover robot.The essay concerned ATC of the TH65125 X 125 Bed Machining Center, which inclouding 20 tools, the most length of 300mm, the largest diameter of 80mm, the biggest weight of 7kg, tool change time of 2s, the small position area. This paper studys the following items:Improving the capacity to 40;Changing the system of PLC-300;Adding the manual control;Select tool by PLC software;tool exchange at random and high speed. Automatic tool changer system.In rotation tools set of CNC, to select tool by PLC software can realize is composed of tool storeroom and tool changer. Automatic tool changer need satisfy with tool changing quickly, positioning tool high precision, sufficient tool storing capacity, little own space and safety rules.