【正文】 ATC instructions received, the machine control system put ATC spindle control to the designated location at the same time, the tool movement to the appropriate location, ATC, with the rotary axis and at the same time, the knives matching tool。 (2) knife from the hydraulic motor drives, fast / slow the points, with proximity switches count and positioning. In parison ladder diagram of the current storage system knife (knife spindle) and goals knife (preknife) and puting, then output rotation instructions, judging by the shortest path rotation in place. This approach requires sufficient hydraulic power and electromagnetic valve knife the rotational speed can be adjusted through the throttle. But over time may be oily hydraulic, oil temperature and environmental factors impact the change in velocity and accuracy. Not generally used in large and mediumsized machine tool change frequently. Including singleand multiring chain ring chain, chain link can take many forms change, see Figure a) to c), the basic structure shown in Figure 2. 8 do Features: knife apply to the larger capacity of the occasion, the space of the small number of generally applicable to the tool in the 30120. Only increase the length of the chain tool will increase the number should not be increased circumferential speed of its moment of inertia of the knife does not increase the disc as large.(4) linear bination knife and the knife library The linear knife simple structure in Figure , tool single order, the capacity of small knife, used for CNC lathe and drill press on. Because the location of fixed knife, ATC pleted action by the spindle without manipulator. The cutter knife is generally the turret bination turret with a bination of the disc cutter knife and the chain bination. Every single knife the knife certificates of smaller, faster tool change. There are also some intensive drum wheel, and the latticetype magazine for the knife, the knifeintensive though. Small footprint, but because of structural constraints, basically not used for single processing center, the concentration used for FMS for the knife system. Tool storage capacityTool storage capacity of the first to consider the needs of processing, from the use of point of view, generally 10 to 40 knives, knife will be the utilization of the high, and the structure is pact. Tool options(1) choose to order processing tool according to the order, followed Add to the knife every knife in the Block. Each tool change, the order of rotation of a cutter knife on location, and remove the need knives, has been used by the cutter knife can be returned to the original Block, can also order Add Block, a knife. However, as the knife in the tool in different processes can not be repeated use of the knife must increase the capacity and lower utilization rate. (2) most of the arbitrary choice of the current system of using arbitrary NC election knives, divided into Daotao coding, coding and memorycutter, three. Daotao coding tool code or knives or Daotao need to install the code used to identify, in accordance with the general principle of binary coding coding. Tool knife election coding method uses a special knife handle structure, and each of the coding tool. Each of the tool has its own code, thereby cutting tool can be in different processes repeatedly used, not to replace the tool back at the original knife, the knife capacity can be reduced accordingly. Memoryelection this paper knife, in this way can knives and knife in the position corresponding to the Daotao memory of the PLC in the NC system, no matter which tool on the Inner knife, tool information is always there in mind, PLC . On the knife with position detection devices, will be the location of each Daotao. This tool can be removed and sent back to arbitrary. On the knife is also a mechanical origin, every election, the nearest knife selection. . Control of the knife 英語原文：Design Of Tool Machine Prop Research significanceThe original knife machine control procedures are designed individually, not used tool management system, features a single parison, the knife only has to find the tool knife, knife positioning the shortest path, axis tool change, but does not support largescale tool. Automatic knife in the knife election, in the puter memory knifeelection on the basis of using the Siemens 840 D features, and the election procedures knife more concise, and plete the space Daotao View. ATC use the knife rapid pletion of STEP7 programming, and have been tested in practice. In the positioning of the knife, PLC controlled modular design method, which future production of similar machines will be very beneficial, it is easy to use its other machine. Automatic tool change systems will be faster growth, reduced tool change time, increase the positioning accuracy tool is an important means to help NC technology development. Tool and inventory ponents of modern production is an important link in the management, especially for large workshop management. The traditional way of account management, and low efficiency, high error rate, and not sharing information and data, tools and the use of state can not track the life cycle, are unable to meet