Punch automatic feeder of the PLC control and design

Abstract: the paper introduces the automatic punch tape feeder design and PLC controller control, analyzes the working principle of institutions and the PLC controller programming method. Key words: punching machine; Automatic feeding; PLC control, automatic punching machine, technical condition in this paper, the automatic punch tape feeder is a kind of used for cold extrusion of ring parts feeding machine, punch technical renovation is the ideal machine. The feeder to overcome the disadvantages of both at home and abroad about punch tape feeder. Such as Japan's RF20SD - 0 r11 manipulator feeding device and punch into an organic whole, from the horizontal ( Side) Feeding, complex structure, assembly, manufacturing, maintenance is difficult, expensive, and not suitable for our country punch longitudinal feed requirements. RF20SD— 0 r11 structure by punch the crankshaft on the output shaft, through the expansion of spline shaft, ball head quarter parts linkage manipulator gear, bevel gear, spur gear, rack, CAM, fork, wire rod and a series of transmission parts made of manipulator grip expansion, lift, clamping, loosen and punch beats the same action to finish feeding, setting up a set of independent drive mobile conveyor, through every other institution to complete reservation, such a mechanism configuration equipment limited to Japan, cannot be applied to domestic press. Domestic some conveying mechanism driven by punch table by connecting rod spring slider on the slideway horizontal slip, will down ramps, through every other institution to mold center, and linkage sheet will be good material peeled away, reciprocating motion of a set of institutions is simpler, without transport agencies, linkage and reliable, made easy. But robots will not ascend, clamping and feeding tilted by gravity slide down, such as specifications, weight changes, the material falling on the workpiece speed, easy to produce fold, pushing institutions will no clamping, positioning is not straight, the rejection rate is higher, use nor safe. Combined with the domestic press working characteristics, the manipulator with transportation agencies as the main device, combined with the automatic unloading safety protection, design the automatic feeder has bigger application value and popularization meaning. Second, the structure design of the feeder is equipped with 3150 kn punch, also can be equipped with 1600 kn and 1250 kn punch. It is mainly composed of frame, Including the brace, electrical box, Angle iron frame) , conveyor ( Including motor, gearbox, roller, conveyor belt, machine, material, every institution and keep-off institutions, etc. ) , manipulator ( Including lifting cylinder, clamping cylinder, skateboard, bracket, connecting rod, hinge, etc. ) , oil supply device ( Including the fuel tank, hydraulic pump, etc. ) , discharge mechanism and safety device components (such as As shown in figure 1) 。 Figure 1 punch automatic feeder structure diagram 1. Frame 2. Conveyor belt 3. 4 manipulator. Separation materials plate of 5. Punch table 6. 7 units. Baffle plate 8. Workpiece 9. Motor 10. Mould press frame main connection, manipulator device and make it to a certain slide track, device conveying mechanism and electrical components. Conveyor is driven by a motor through the belt, gear reducer drive to drive shaft, the conveyor belt at a certain speed delivery work. After loading into the feeding ( Artificial) , through every other institution to desired location. Three, PLC control manipulator to complete the workpiece by the action of A move to B, manipulator diagram is shown in figure 2. Its action is shown in figure 3. Figure 2 manipulator diagram in figure 3 manipulator movement process on each work arm manipulator has, the lower limit switch and left and right limit switch, and the clamping device with no limit switch. Once clamping, within the control of PLC timer starts, timing constraints, clamping action immediately. After manipulator to point B, the workpiece release time is controlled by the timer, at the end of the timing, said workpiece has loosened. About the distribution of the input and output points within the PLC controller, as shown in figure 4. Figure 4 in the PLC I/O point distribution diagram of this manipulator movement process is as follows: when press the start button, the manipulator from the origin began to decline, down exactly when touching the lower limit switch ( X401 through) , down to stop. Connected to the timer at the same time, the manipulator began clamping workpiece, a timer, clamping. Manipulator rise, rise to the top, touching the upper limit switch ( X402 through) And rise to stop. Manipulator moves to the right, the right met the right limit switch ( X403 through) , moves to the right stop. Manipulator falling, down to the end, touching the lower limit switch ( X401 through) When falling to stop. Connected to the timer at the same time, the manipulator to relax artifacts, timer, workpiece has loosened. Manipulator rise, rise to touching the upper limit switch ( X402 through) When to stop. Manipulator moves left, left to encounter left limit switch (origin X404 through) When the left stop. So the end of the manipulator motion of a cycle. Manipulator automatic operation flow chart shown in figure 5. State transition diagram is shown in figure 6. Ladder diagram as shown in figure 7.
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