PLC is in boring mill the application on modular machine tool

Foreword: As a result of but have rendered great service of program control appliance can be strong, reliability is high, the environment gets used to ability and interference rejection ability strong, and wiring is simple, process designing is agile, convenient wait for a characteristic to apply extensively at industrial control. At present the automation system of a lot of domestic manufacturer and treatment machine tool use PLC to replace afterwards report to control. Be like the one steam of automobile industry, 2 steam, it is early in 80 time later period begins to control relay the system be transformed energetically can make up programmed control to make a system, each manufacturer is in ingoing equipment is medium in last few years major it is by what can make up programmed control to make. Because the market is right the demand of gear-box of water chestnut wood is big, and the ability that the factory machines to housing of gear-box of water chestnut wood is limited, need to abstain mill of boring of housing of gear-box of wood of a water chestnut modular machine tool, I assumed this machine tool the design task of electric control system. 2.

Boring mill the mill of boring of electric control requirement of modular machine tool modular machine tool is the special machine tool that uses end panel of housing of gear-box of wood of treatment water chestnut and axial opening. Machine tool by head of intermediate slip, milling, small head, boring head a few parts are comprised. The clamp of workpiece, loose control by atmospheric pressure, on slip of workpiece clamp inter, part by milling head and small head big to housing, small end panel undertakes milling is machined, undertake by aperture of boring head countershaft boring is machined. Of intermediate slip and boring head, small head into, retreat by drive of hydraulic pressure system, the knows control implementation work that carries pair of milling electric machinery, boring electric machinery, hydraulic pressure electric machinery and a powerful person of hydraulic pressure electromagnetism is as follows circularly: (1) workpiece is installed and after clamp, press the pushbutton that start, milling electric machinery is started, intermediate slip labour is entered, face of milling main aspects. (2) after milling ends, intermediate slip is entered by labour turn speed. (3) speed reachs the designated position turn 2 times to be versed in into, at the same time small head electric machinery is started and feed, milling small end panel. (4) after milling ends, small head electric machinery stops and retreat, intermediate slip stops to locate. (5) boring electric machinery is started, boring head is versed in into countershaft aperture undertakes boring is machined. (6) boring head speed. (7) 2 times labour enters boring head to be machined all right to another axis Kong Jin. (8) boring head locates and delay time. (9) apply the brake of boring electric machinery. (10) boring head fast fall back on former. (11) intermediate slip fast fall back on former, clamping apparatus is loose take out work, await next loop. I/O address distributes a list 3.

Systematic hardware is designed according to afore-mentioned machine tools electric control asks, input output all is switch quantity, the input signal that need PLC detects has: 6 pushbutton, 8 journeys switch, pressure relay and 3 transfer switch add up to 22. PLC output controls signal to have: 7 electromagnetism a powerful person, 3 relay, 3 signal indicator light in all 13. The dot of the control of hydraulic pressure electric machinery and electric machinery moves control not to pass PLC. Accordingly, the F1-40MR that chooses 3 water chestnut companies of Japanese (relay is outputted, integral type) PLC is main unit (24 inputs dot, 16 output are nodded) requirement of can contented control. Specific I/O ground allocates continuously see on watch. If the exterior hookup of PLC control system pursues 1. 4.

Systematic software designs 　 4.

1.

Integral programming is in systematic programming, used adjust, automatic, pace controls fashion into 3 kinds, use module to set a structure. different control the program of means is written respectively, use a condition to jump turn instruction, according to working way select switch the decision executes order of which kinds of control. Such making that program structure is clear, process designing is convenient. If the graph is shown 2 times,the system controls the total construction of the program. Public program is to fasten altogether to use a program, the dot that adjusts a program to realize a machine tool uses control. Voluntary program included to take two kinds of functions automatically with the pace. When SA3 park adjusts position X412 gets report, carry out adjust a program, the changeover in public program prohibits M574 is effective, voluntary program cannot be changed. When SA3 park the X411 when automatic status gets report, the changeover in public program starts M575 to be in press report is gotten after the pushbutton that start, make voluntary program can be carried out smoothly. When SA3 park pace takes position X410 gets report, in press the changeover when the pushbutton that start is started M575 gets report and instantaneous disconnects changeover prohibits M574, make voluntary program can realize one pace to change, carry out metre of a job, start pushbutton to carry out next job metre by again, implementation pace takes control. 4.

2.

Design this boring mill from traverse foreword the sequence control that modular machine tool is switch quantity, using software process designing to realize sequence control is the characteristic with the most outstanding PLC. The method basically has the programming that PLC of 3 series of water chestnut F1 realize sequence control 4 kinds: Use a pace to dictate into echelon (STL) process designing; uses shift to dictate process designing; uses set / restoration (S/R) ; of instruction process designing is used open, stop, protect circuit process designing. From intuitionistic understand easily, the point of view that devises forthright sets out I chose a pace to dictate into echelon the work out is automatic program. If ordinal function graph and graph of voluntary program echelon pursue 3 with the graph 4 are shown. 5.

The pace that the article introduced to use PLC of series of F1 of 3 water chestnut takes the last word echelon instruction realizes pair of boring mill the automata of modular machine tool. The application of the spot makes clear as a result, PLC function is strong, interference rejection performance is good, working life is long, reliability is high, process designing is agile, raised the automation level of equipment greatly. CNC Milling