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¡¡¡¡´ÅÁ÷±äÒº£¨Magnetorheological Fluid,¼ò³Æ MRF£©Æ½Ê±ÎªÀàҺ̬£¬ÔÚÍâ´Å³¡µÄ×÷ÓÃÏ£¬±íÏÖΪ¹ÌÌåµÄÐÔÖÊ£¬µ±³·³ýÍâ¼Ó´Å³¡Ê±£¬ÓÖ»Ö¸´Ô­À´µÄÁ÷¶¯ÐÔÖÊ£¬¼´ÔÚҺ̬ºÍ¹Ì̬֮¼ä½øÐпìËÙ¿ÉÄæµÄת»»£¬²¢ÇÒÕâÖÖת»»ÏìÓ¦¿ì£¨ms Á¿¼¶£©¡¢¿ÉÄæÐԺᣱ¾ÎÄ»ùÓÚ MRF µÄÉÏÊöÐÔÖÊÉè¼ÆÁËÒ»Öֽṹ¼òµ¥¡¢Í¨ÓÃÐԺá¢ÄÜʵÏÖÈáÐÔץȡµÄͨÓÃÐÔ»úе¼Ð¾ß£¬²¢¶ÔÆä×¥ È¡ÐÔÄܽøÐÐÁ˲âÊÔ·ÖÎö£¬Ö÷Òª¹¤×÷ÈçÏ£º

¡¡¡¡£¨1£©ÔËÓûùÒºÖû»·¨ÅäÖÆ³ö MRF,´î½¨ÊµÑéÆ½Ì¨£¬¿ªÕ¹ MRF Ôڴų¡×÷ÓÃϵļ·Ñ¹ºÍÀ­ÉìÁ¦Ñ§ÐÔÄܲâÊÔ£»·¢ÏÖÔÚ¼·Ñ¹ÓëÀ­Éì¹ý³ÌÖÐÓ¦Á¦ËæÓ¦±äµÄ±ä»¯·ÖΪÈý¸ö½×¶Î£¬²¢·ÖÎö¸÷½×¶Î΢¹Û½á¹¹ÑÝ»¯¹ý³Ì£»½øÒ»²½Ñо¿ MRF ³Á½µÎȶ¨ÐÔºÍÔ¤½á¹¹»¯¹ý³Ì£¬Îª´ÅÁ÷±ä¼Ð¾ßµÄÉè¼ÆÌṩ²Î¿¼¡£

¡¡¡¡£¨2£©¸ù¾Ý MRF ¼·Ñ¹ÓëÀ­É칤×÷ģʽ¼°Á¦Ñ§ÐÔÄÜÌØµã£¬Ìá³ö MRF Ö¸Ì×ʽ¹¤×÷ģʽ£¬Éè¼Æ³ö³õʼ´ÅÁ÷±ä¼Ð¾ß£»½øÐв»Í¬ÐÎ×´ÎïÌåµÄץȡÊÔÑ飬·¢ÏÖÆä¾ßÓÐÁ¼ºÃµÄͨÓÃÐÔ£¬»ùÓÚץȡ²»Îȶ¨µÄȱµã£¬Ìá³ö´Å³¡ÄÚ¾ÛʽµÄÓÅ»¯Éè¼Æ·½°¸¡£

¡¡¡¡£¨3£©»ùÓÚÓÅ»¯·½°¸¶ÔÕûÌå´Å·½øÐÐÖØÐ¹滮£¬ÔËÓà ANSYS ÓÐÏÞÔªÈí¼þÄ£Äâ MRF ¹¤×÷ÇøÓòµÄ´Å³¡·Ö²¼²¢È·¶¨´ÅÁ÷±äÖ¸Ì׵ĺÏÊʳߴ磻ÓÅ»¯ºóµÄ´ÅÁ÷±ä¼Ð¾ß¾ßÓÐÓÅÒìµÄͨÓÃÐÔ£»ÀûÓà INSTRON ²ÄÁÏÊÔÑé»ú²âÊÔ´ÅÁ÷±ä¼Ð¾ßµÄץȡÁ¦£¬·ÖÎöµÃµ½ÆäץȡÐÔÄÜÓëËù¼ÓµçÁ÷¡¢×¥È¡ÎïµÄÐÎ×´³ß´çµÈÒòËØÓйØ¡£

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ABSTRACT

¡¡¡¡In recent years, robots have been widely used in various industries. Mechanical grippers  have been widely studied and studied as the executing parts of the robot's specific grasping  actions. At present, all types of mechanical grippers have many problems such as complicated  structure and poor versatility, which limits the application of robot technology in some  aspects. Therefore, research and development of universal and efficient mechanical grippers  have important engineering significance and practical values.

¡¡¡¡Magnetorheological Fluid £¨MRF£© is usually a liquid. Under the action of an external  magnetic field, it is in the nature of a solid. When the magnetic field is removed, the original flow property is restored, that is, the liquid and the solid state are fast. Reversible conversion,  and this conversion response is fast £¨ms level£©£¬ good reversibility. Based on the above  properties of MRF, this paper designs a general-purpose mechanical grippers with simple

¡¡¡¡structure, good universality, fast response, and flexible gripping. The gripper performance is  tested and analyzed. The main work is as follows:

¡¡¡¡£¨1£© The MRF was prepared using a liquid-substitution method, an experimental platform  was set up, and the mechanical properties of the MRF under the action of a magnetic field  were tested. It was found that the stress changes with strain during the extrusion and drawing  process and is pided into three stages. Analyze the evolution of microstructure in each stage;  further study the settlement stability and pre-structured process of MRF, and provide  reference for the design of magnetorheological gripper.

¡¡¡¡£¨2£© According to the working and mechanical properties of MRF extrusion and drawing,  the MRF finger-tip working mode was put forward, and the initial magnetorheological fixture  was designed. The gripping tests of different shaped objects were performed, and it was found  that it had good versatility and was based on grabbing. The disadvantages of instability,  proposed magnetic field cohesion optimization design.

¡¡¡¡£¨3£© The overall magnetic circuit was re-planned based on an optimized scheme. ANSYS  finite element software was used to optimize the magnetic field distribution in the MRF work  area and determine the appropriate size of the magneto-rheological finger sets. The optimized  magnetorheological fixture had excellent versatility; the use of INSTRON materials The  testing machine tests the gripping force of the magneto-rheological fixture and analyzes that  the gripping performance is related to the applied current, the shape and size of the gripper,  and other factors.

¡¡¡¡On the whole, this paper can provides technical reserves and references for the design of  magneto-rheological grippers and related devices, and can also provide guidance for research and application in related fields.

¡¡¡¡Key words: magnetorheological fluid, gripper device, magnetic circuit, simulated  analysis

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