Processing center automatic tool change process PLC programming skills

Processing center automatic tool change process of PLC programming skills first machine tool plant in qinghai QiPing welcome to e exhibition hall 1 machining center/FMS exhibition hall and milling machining center, milling machining center, drilling and milling machining center, boring and milling machining center, five axis machining center,. 。 。 Processing program and PLC program diagram of PLC is the core software for normal operation of the CNC machine, is the bridge connecting and NC machine tools, also is the key of the machine tools electrical design personnel debugging. A complete PLC controller program can not only make the machine run normally, also let a person look at a glance, which not only provide convenience for their debugging, can also help the maintenance personnel find fault reason and analysis. Here are XH756B series horizontal machining center with SIEMENS802D numerical control system, in the process of automatic tool changer is introduced that the programming skills of the manipulator. First make a brief introduction of the basic condition of the cutting tool switching device, the library can be positive and negative to the rotation of the chain knife library, manipulator mounted on the tool switching device with 15 steps will be in the library the knives exchange to the main shaft, and the spindle tool also back to the library corresponding knife sets in. In order to try to shorten the tool change time, we adopt the way of tool primary and parts processing simultaneously to compression tool change time. Manipulator action sequence is as follows: step 1: translation back, grasp the knife library primary tool: step 2: draw out a sword, pulled out a knife sets of knives: step 3: translation, leave the library side catch knife position: step 4: draw out a sword back, manipulator retract: step 5: rocker arm outstretched, radial steering shaft side: step 6: translation, grasp the spindle tool: step 7: draw out a sword out, pull out the tool in the spindle: step 8: forward or reverse in the knife, the cutting tool exchange: step 9: draw out a sword back, insert the primary tool spindle: step 10: translation retract, manipulator left spindle: step 11: rocker arm retracted, rocker arm to knife library side: step 12: draw out a sword, prepared will be sent back spindle cutter knife library: step 13: translation retract, manipulator moving knife library: step 14: draw out a sword back, insert the spindle cutter knife library: step 15: translation, left side of knife library knife position. More than 15 steps can be divided into the following four stages: stage 1: grasp the new knife. Txx code control knife library according to the directions to the nearest to the programming tool location, in place and a knife library positioning signal when I start the manipulator, a step 1 to step 2, step 3 and step 4, will grasp the in hand waiting for tool change programming tools. Stage 2: tool change. M06 cutter replacement fixed cycle start 'TOOL'. 'TOOL' to control the position coordinates to move to change the knife, and notify PLC M90 start the TOOL change, PLC with M90 signal request NC 'read banned' and start the manipulator TOOL change steps 5-6-7 - steps 8-9-10 - step 11, at the same time with step 5 in signal control libraries to the spindle knife position. Stage 3: also knife. Step 5 library rotation stop and start the knife library positioning signal, I start the manipulator step 12 - step 13-14-15, the spindle tool also went to the repository and memory spindle knife update of storage. Read in step 11, after the completion of the 'ban', activate the tool parameters, processing procedure and manipulator is also at the same time. Stage 4: grasp the primary new sword. Under M06 under a follow the procedure to be used Txx knives, knife library in complete knife may be started at the same time of parts processing manipulator moves after step 1 to step 2, step 3 and step 4, the cutting tool used in the primary of next working procedure caught mechanical hand, waiting for M06 start the tool change behind the action, which greatly shortens the time of cutting tool exchange and improve the working efficiency. Note: Txx and M06 can't program in the same segment: in fixed cycle TOOL, all displacement program Duan Yingjia G153 ( Duan Youxiao) Cancel the basic migration: three tool change process: (1) with knife: spindle wudao, Txx/M06 installed directly programming tools: (2) change the knife: main shaft with a knife, exchange programming tools and spindle: (3) also knife: main shaft with a knife, programming T0, the spindle tool back knife library. Spindle must stop Angle floating point parameters based on PLC MD14514 [ 0] :$ MN_USER_DATA_FLOAT [ 0] This programming method is the core of the manipulator movement time sequence is divided into a total of 15 steps. Stored in a 'step' in the middle of the variable, the intermediate variable point of a byte, after completion of each 'steps' to change the value of the intermediate variables for the next 'steps', and the whole steps after the completion of the intermediate variable set to zero, the next tool change execution is coming and then start from step 1. Not only make the PLC program is simple, intuitive, and because the 'step' is the only, so it can avoid the mutual interference between signals, programmers don't have to rack one's brains for each output signal and all kinds of restrictions, ingenious use of 'variables' achieve twice the result with half the effort. See below process and PLC program relations. In addition, the knife library operation, exchange of tray, etc. Also can use this approach to programming.
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