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 Wysłany: Czw 19:10, 20 Sty 2011 Temat postu: tory burch CNC machine tools and their correct sel |
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CNC machine tools and their correct selection
Machine will generally do not need a special process the output file. Currently, many CAD / CAM packages provide automatic programming, the software typically prompts in the programming interface issues related to process planning, such as tool selection, processing,[link widoczny dla zalogowanych], path planning, such as cutting the amount set, as long as the programmer to set the relevant parameters to automatically generate NC programs, and transfer to the CNC machine to complete processing. Therefore, the NC machining tool selection and cutting parameters determined in the complete state of human-computer interaction, which is common in stark contrast to machining, but also requires the programmer must master the tool selection and cutting the basic principles, fully considered in the programming of CNC machining, and can choose the right tool and cutting parameters. First, the types of tools commonly used in CNC machining and CNC machining characteristics of CNC machine tools must be adapted to high-speed, high efficiency and high degree of automation features, the general should include generic tools,[link widoczny dla zalogowanych], knife handle and a small amount of special universal connector holder. To connect the tool shank and the head mounted on the machine power, it has gradually standardized and serialized. 1. CNC tool and cutter structure of the classification can be divided according to: the overall style, mosaic, using welding or machine clip-on connector, clip-on machine can be divided into non-translocation and turning two; special composite type, such as knives, cut Chen-style knives and so on. According to the materials used in manufacturing tools can be divided into: high speed steel cutting tools; carbide cutting tools; diamond tools; other tools, such as cubic boron nitride cutting tool materials, ceramics and cutting tools. From the cutting process can be divided into: turning tool. Exceptionally round,[link widoczny dla zalogowanych], bore, thread, cutting knives etc.; drilling tools including drill bits, reamers, taps, etc.; boring tool; milling and cutting tools. CNC machine tools in order to adapt the tool durable, stable, easy to tune,[link widoczny dla zalogowanych], and other requirements may be changing in recent years, turning machine tool clamp is widely used, in the number of CNC tool a whole runs 30% to 40%, metal removal accounted for 80% of the total number of 90%. 2. Characteristics of CNC tool machine tool CNC tool and common tool used in comparison, there are many different requirements, has the following characteristics: rigidity (especially roughing tool), high precision anti-vibration and thermal deformation; interchangeability Well, for quick tool change; life and high, stable cutting performance and reliability; easy to adjust the size of the tool to reduce tool change to adjust the time; tool chip breaker should be able to reliably or on Chip, chip in order to facilitate the exclusion; serialization and standardization to facilitate programming and tool management. Second, the choice of NC tool cutting tool in CNC programming option is under the state of human-computer interaction. Processing capacity should be based on the machine, workpiece material properties, manufacturing processes, cutting, and other relevant factors the correct selection of tools and tool holders. The general principle is the tool selection: easy to install, good rigidity, durability and accuracy. Meet the processing requirements of the premise, as we choose a shorter handle, in order to improve the rigidity of tooling. When selecting tools, to make the tool size and the surface of workpiece size is adapted. Production, plane parts around the outline of the processing, often used mills; milling plane, to be elected carbide cutter; processing boss, groove, the choice of high speed steel cutter; processing of rough surfaces or rough TLn,-J,[link widoczny dla zalogowanych], can be selected corn milling carbide inserts; for some three-dimensional surface contour and variable angle processing, often using spherical milling cutter, annular cutter, taper milling cutter and the disc knife. During the free surface (mold) processing, because the ball end cutter cutting speed is zero, so to ensure accuracy, cutting the top secret from the general use of spacing, so the ball tool commonly used in surface finishing. The flat surface processing tool in the quality and efficiency are better than cutting the ball end cutters, so that the cut in the guaranteed under the premise, however, whether roughing or finishing the surface should be preferred flat knife. In addition, the durability and precision cutting tools and tool great price relationships, we must draw attention is this: In most cases, choose a good tool despite an increase in tool cost, but the resulting machining quality and efficiency , you can greatly reduce the cost of the entire process. CNC machine tools in the economic process, due to the grinding tool, measurement and replacement, mostly carried out manually, taking supporting a longer time, therefore, must be reasonable arrangements for the order of the tool. Should normally follow the following principles: �� to minimize the Number of tools; �� a clamping tool, it should be possible to complete all its processing steps; �� rough finish of the tool should be used separately, even the same tool sizes; �� After the first milling drill; �� first to surface finishing, finishing after the two-dimensional profile; �� possible cases, possible use of automatic tool changing capabilities of CNC machine tools to improve production efficiency. (02)
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