-- system of contemporary CNC control raises manufacturing efficiency to pursue curved surface of 1 milling freedom: Special high speed installs a loop " Cycle 832 " in 3 axes and treatment of 5 axes high speed the domain uses support to machine outline of free curved surface. CNC controls a system to be able to have the effect that produces quickly, this is made to tool and mould for it is beneficial. Because come from the competition with the intense country of small labor cost, the mould makes manufacturer need to raise its to manufacture efficiency greatly. To achieve this goal, tool and mould production manufacturer can make its produce implementation automation further, and can accelerate cutting process through CNC control system. Accordingly, the industrial automation of Xi Menzi company and drive Technical Division are made for the mould developed new treatment loop and new function, and its compositive in the CNC control system to Sinumerik 840D. These new treatment loops and new function have high speed to install a loop (HSC) Cycle 832 and beforehand the position is controlled (APC) . Especially Cycle 832 uses curved surface of auxiliary treatment freedom. This kind of loop was united in wedlock important, the order injunction that treatment of executive high speed wants and machine tool data, and auxiliary create the simple program with structural sex. Current, did not add new function circularly, more it is optimal and a few more integrated control a function. These functions, control a system through actual CNC, reduced machine tool handlers and the job of CAD/CAM production manufacturer. Inside the limits that machines in high speed, when the CAM order that executes very short block, control system must want to achieve those who exceed 10m/min higher feed rate. In addition, the exterior quality that the user still expects the move is better and inside micron limits relatively high accuracy. Machine the strategy in view of what have all sorts of differring, cycle 832 adjusts necessary process well and truly. The characteristic of this loop is the different strategy that can implement rough machining working procedure and finish machining working procedure. To rough machining process, the continuous method that adopts outline circularly machines means to machine speed in order to emphasize particularly on at rising; Contrary when finish machining, put the emphasis on the exterior quality of the precision of treatment and treatment. In these two kinds of circumstances, will maintain treatment outline through tolerancepublic errand data, so that acquire the treatment quality of a requirement. Cycle 832 support is had most 3 linear axes and two machine tools that rotor processes work at the same time. Graph 2 surfaces quality: Use CNC function APC(beforehand the position controls) , can raise gain coefficient significantly (Kv_-Faktor) , production of no less than carries out what what make clear, below same exterior quality situation, can use higher treatment rate, shorten handling time. Cycle 832 bag is contained finish machining, semifinishing machining, rough machining and cancel (here is textual it is Abwahl, means " cancel " , be looked to regard a kind of treatment as the type, because pass,be call " Abwahl cancels " the value of the machine tool data that can make already was changed and set is returned by machine tool manufacturer undertake machining on the numerical value of mix up beforehand -- interpret is noted) means of 4 kinds of treatment, in CAM program, these 4 kinds of treatment circulate, involve the treatment precision of outline and the treatment rate that can achieve directly. Make in the mould in, besides such as a few batten (free curve) outside geometrical function, to can producing the drop of workpiece outline the cloud should realize control above all. Nod the cloud to produce these, CAM system used the public errand that produces deviation possibly on X, Y and Z direction to be worth. Inside limits of this public errand, computation gives the point that defines finally, store its in new NC program. At this moment, depending on control system, high speed setting can carry out different tolerancepublic errand value circularly, machine what means Zhong Mou machines one kind to emphasize particularly on to 4 kinds with its will undertake adjustment. Personnel of machine tool operation can store the public errand that comes from CAM system in Sinumerik (here is the system of Sinumerik 840D numerical control that points to Xi Menzi -- interpret is noted) in loop of high speed setting. Nextpage pursues 3 improved manufacturing efficiency: When processing work, new now control can improve manufacturing efficiency circularly. The efficiency when this is executing finish machining order can rise 25% , can improve the exterior quality of place milling mould. Taller machine tool is rigid, the treatment surface quality that improves work on one hand Sinumerik compressor uses the public errand that is computational batten as to take this kind of public errand, on the other hand, in orbit control moves in, this kind of public errand uses as decelerate control, such, conformity of linear Duan Ke goes to the outline that provides by G1 block inside tolerancepublic errand belt in the batten that controls systematic interior, this batten makes CNC controls a system to be used directly undertake orbit is controlled. In a certain treatment, people should transfer which function and the property that what is aimed at a machine tool, each machine tool makes manufacturer can be aimed at its machine tool and him product that need treatment to decide. After, the knowledge of the NC order that the user needs to have it only processes a type with it. To rough machining, the user just undertakes process designing to tolerancepublic errand value, get regarding the workpiece geometry of G1 block as data then. When undertaking numerical control process designing, insist to use the function with these rich content, can improve manufacturing efficiency significantly. Should take two kinds of challenges seriously now: ◆ above all, raise treatment rate, cannot harm treatment surface quality as a result of generation vibration. ◆ next, the natural frequency of the machine tool cannot restrict the top speed of machine tool axis. Graph 4 Sinumerik 840D: If plan institute is shown,change for the system model Sinumerik 840D Solution Line and Sinumics drive standard component, and 1FT7 of high-powered servo electric machinery. The new function of the system of Sinumerik numerical control of a new development underwent the test of two kinds of afore-mentioned requirements. This kind of new function raised the gain coefficient of the machine tool significantly, and the main transfer machinery that did not change a machine tool. Gain coefficient (production manufacturer of every machine tool knows) be described a machine tool " hard " characteristic, coefficient of this kind of gain stipulated an axis can be used minutely how many meters speed will move, till the positional lag distance of one millimeter. (lag distance S is to express to give the error between the position and real position, this lag position error is to depend on the journey speed V of gain coefficient Kv and machine tool axis, namely journey speed of the axis is divided with gain coefficient, s=V/Kv -- interpret is noted) the new function of system of Sinumerik numerical control beforehand the position is controlled (APC) can produce very favorable effect to this. Produce course of study actually to already made clear: People uses APC successfully test and verify its restrain vibration effectively. Taking positive result is, most circumstance makes gain coefficient Kv raised one times, some achieved 3 times even. This can go up in the machine tool can rise significantly so called add acceleration. State distance adds acceleration to restrict the biggest acceleration to the three cubed of time (the unit that adds acceleration is M/s3 -- interpret is noted) . That is to say, one taller add acceleration to be helpful for raising acceleration, this can bring about very short handling time. Without doubt, a vibration that prevents machine tool axis effectively, be helpful for gaining the workpiece face of a high quality. Graph 5 modern treatment circulate: When machining a mould, this kind of modern treatment conduces to an exterior quality, precision and speed circularly 3 kinds of main demands are combined optimally. Restrain vibration, can mix through feedback on the technology receive an axis (press those who give rotate speed to be worth the job) the appropriate signal that surveys a system directly will come true. Applied APC must want to satisfy following requirement: ◆ is indispensible two survey a system, one is electric machinery surveys a system, another is to be in same (coordinate) survey a system on the axis directly. The current package photograph of the efficient and current package that ◆ APC can be the same as Xi Menzi only and high level is united in wedlock, ability moves. ◆ needs the actuating device that controls vibration must be appropriate. Because, check a watch for many times bright, APC can not satisfy all machine tools. But, to high speed milling, APC function is most appropriate. The application of this function, can improve manufacturing efficiency significantly, because, can make the traversal speed of finish machining program rose 25% , improved the exterior quality of treatment. Can move gain coefficient through APC be as high as 60% , corresponding ground reduces the natural frequency of the machine tool. The new loop that these NC that are it by Xi Menzi company control systematic place to develop and function, improved the performance of the machine tool significantly. The user that is mould and tool manufacturing industry offerred more possibility, help user finishs their manufacturing job with rapidder rate and inferior charge. CNC Milling