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Basic principles of ultra-precision machining technology

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  • May 25, 2022 2:03 AM EDT

    Basic principles of ultra-precision machining technology

    Basic principles of ultra-precision machining technology

    1. CNC single-point diamond machining technology

    CNC single-point diamond machining technology is a processing technology for aspherical optical parts. It uses a single crystal diamond tool on an ultra-precision CNC lathe to process aspherical optical parts by single-point turning with a diamond tool under the control of a specific 5 axis machining environment. This technology is mainly used for optical parts of small and medium size infrared crystals and metal materials.

    2. CNC grinding and polishing technology

    CNC grinding and polishing technology is an optical part manufacturing technology that uses CNC precision machine tools to grind the surface of the workpiece into the required surface shape, and then polish it with a flexible polishing die to make the workpiece meet the technical requirements. The principle of this technology is close to the classical optical processing technology, mainly through the digital precision control of the machine tool to realize the precision processing of optical parts.

    3. Optical lens molding technology

    The optical lens molding technology is to put the softened glass into a high-precision mold, and directly press and mold making the optical parts that meet the requirements of use under the conditions of heating, pressure and oxygen-free. It can be said that the popularization and application of optical lens molding technology is a major revolution in the processing technology of optical glass parts. This technology has epoch-making significance for the cost reduction and production increase of aspheric glass parts.

    Application Scope of Ultra-Precision Machining Technology of Optical Parts

    1. CNC single-point diamond machining technology

    At present, the materials that meet the optical surface quality requirements can be directly processed by diamond turning technology, mainly non-ferrous metals, germanium, plastics and infrared optical crystals, while the processing of glass cannot meet the optical surface quality requirements, and needs to continue grinding and polishing correction. Another main use of Basic principles of ultra-precision machining technology is to process various precision molds required for compression molding.

    2. CNC grinding and polishing technology

    The main processing material of CNC grinding and polishing technology is glass, which makes up for the deficiency that CNC single-point diamond processing technology cannot directly process finished optical glass parts. This technology is mainly used for cnc turning aluminum spherical and aspherical optical parts. It is the main technology to replace the traditional classical optical glass processing method. It has the advantages of high precision and high processing efficiency. At present, the development history of this technology in the market is relatively long, and the mature equipment is relatively comprehensive.

    The computer numerical control grinding and polishing technology has not only made great progress in the automation of aluminum machining service and machining accuracy, but also the research on various polishing methods and principles has greatly promoted the development of optical aspheric surface machining technology.

    3. Optical lens molding technology

    At present, optical lens molding technology has been used to mass-produce precise spherical and aspherical lenses. It can not only manufacture commonly used medium aperture lenses, but also extend to 100 micron micro lens arrays and 50 mm larger aperture lenses, which can not only manufacture spherical and aspheric optical parts in military and civilian optical instruments, but also manufacture optical communication Aspherical lenses for optical fiber couplers, etc.

  • May 25, 2022 2:03 AM EDT

    The Advantages And Design Of Swiss Machining Features

    You are here: Home / Guide / The Advantages And Design Of Swiss Machining Features
     
    2022-05-24
     

    The Advantages And Design Of Swiss Machining Features

    Features and advantages of Swiss machining

    • (1) Shorten the product manufacturing process chain and improve production efficiency. Turn-milling composite machining can realize all or most of the Swiss cnc machining processes in one loading, thus greatly shortening the product manufacturing process chain. In this way, on the one hand, the production auxiliary time caused by the change of the loading card is reduced, and at the same time, the manufacturing cycle and waiting time of the tooling and fixture are also reduced, which can significantly improve the production efficiency.
    • (2) Reduce the number of clamping and improve the machining accuracy. The reduction in the number of card loadings avoids the accumulation of errors due to positioning fiducial conversions. At the same time, most of the turning-milling composite processing equipment has the function of online detection, which can realize the in-situ detection and precision control of key data in the manufacturing process, thereby improving the processing precision of products.
    • (3) Reduce the floor space and reduce the production cost. Although the price of a single turn-milling compound processing equipment is relatively high, due to the shortening of the manufacturing process chain and the reduction of equipment required for the product, as well as the reduction of the number of fixtures, workshop area and equipment maintenance costs, it can effectively reduce the overall fixed assets. The cost of investment, production operation and management.

    Design features of Swiss machining

    Since the structure of Swiss machining china is different from that of traditional CNC lathes, the processing efficiency and machining accuracy of Swiss machining are higher than those of CNC lathes. Swiss machining adopts dual-axis arrangement of tools. This design greatly saves the processing cycle time. By shortening the tool exchange time between the arrangement of tools and the opposing tool holder, the overlapping functions of multiple tool holders and effective axis movement of thread chips are realized. , The direct spindle indexing function during the secondary processing shortens the actual and empty travel time.

    In the machining process of the spindle and the workpiece clamping part, the chip tool has always played a very important role, which provides a strong guarantee for constant machining accuracy. As far as the Swiss cnc machining market is concerned, 32mm is its large machining diameter, which gives Swiss machining a great advantage in the precision shaft machining market.

    This series of machine tools can also be equipped with an automatic feeding device to realize fully automatic production of a single machine tool, reducing labor costs and defective products in the production process, and can be used to produce large quantities of precision shaft parts

  • May 25, 2022 2:04 AM EDT

    The Role Of The Guide Sleeve In Swiss Machining

    You are here: Home / Guide / The Role Of The Guide Sleeve In Swiss Machining
     
    2022-05-24
     

    The Role Of The Guide Sleeve In Swiss Machining

    Compared with CNC lathes, Swiss has made a qualitative leap in machining efficiency and machining accuracy. Due to the use of dual-axis arrangement of tools, the machining cycle time is reduced. Thread chip effective axis movement overlap function, direct spindle indexing function during secondary machining, to shorten the idle time. The chip tool has always been processed at the clamping part of the spindle and the workpiece, which ensures the constant processing accuracy. At present, the china cnc turning diameter of the Swiss machine on the market is 32mm, which has a great advantage in the precision shaft processing market. This series of machine tools can be equipped with an automatic feeding device to realize fully automatic production of a single machine tool and reduce labor costs and product defect rates. It is very suitable for mass production of precision shaft parts.

    1. The role of the guide sleeve

    Due to the forces generated when the material is bent or machined, it is difficult to achieve a high-precision laser cutting process if the machined part is far from the material holding position.

    Therefore, in order to process slender products, the mechanism (guide bush) that supports the material is installed between the collet and the tool, so that the collet can move in the longitudinal direction of the material. Since the guide bush supports the material in the vicinity of the tool, the bending of the material caused by the forces generated during machining is reduced, enabling high-precision machining.

    2. Rotary guide bush

    The rotary guide bush is connected with the main shaft through the middle connecting mechanism, which can realize synchronous rotation with the main shaft. It is suitable for workpieces with an aspect ratio greater than 3.

    Advantages:

    • â‘  The requirements for the straightness of the material are relatively lower.
    • â‘¡The guide bush rotates together with the material, so friction is not easily generated in the rotation direction, and there is no jamming even in the case of high-speed cnc machining

    Disadvantages:

    • â‘  The cost is relatively high.
    • â‘¡The remaining tailings are long, causing waste of materials.
    • â‘¢The machining accuracy is lower than that of the fixed guide bush.

    3. Fixed guide sleeve

    Fixed bushings do not rotate with the spindle (material). It is suitable for workpieces with an aspect ratio greater than 3.

    Advantages:

    Disadvantages:

    • â‘  The remaining tailings are long, causing waste of materials
    • â‘¡The guide sleeve and the material do not rotate together, so friction is easy to occur in the direction of rotation. Generally, there should be an oil film between the metal sleeve and the material for lubrication. However, if machining is performed at a higher speed, the oil film may lose its lubricity and become stuck, causing the guide bush to burn out.

    4. No guide sleeve

    It is suitable for workpieces with an aspect ratio of less than 3. That is, the spindle clamps the material for cnc machining.

    • Advantages: The remaining tailings are shorter, saving materials
    • Disadvantages: If the workpiece is hard and slender, there may be tapered products that make knives and broken knives.