Design and development of variable radius of gyration towline device

1 Introduction
        Towline device (or cable chain device ) is used to drive the hydraulic pipes and cables accompanying tube is a device of a modern hydraulic electrical automation equipment indispensable.
        With the continuous development of industrial automation , this device has been more design and use of departmental applications and attention , and particularly in the design and manufacture of modern machine tools and heavy metallurgical automation devices. Therefore, the design and development aspects of the towline device of the deep research is necessary .
        2 towline issues raised
        Towline devices currently used in domestic or imported equipment , basically have only a fixed radius of gyration , are single-turn radius. The radius of gyration towline , mainly based drag the pipe is the minimum bend radius ( or rather , the minimum bend radius of the maximum diameter of the tube ) to determine . Thus , the cup size changes when dragging the diameter or the presence of other installation requirements , you must replace the new towline to produce the desired radius of gyration . Thus , a single radius of gyration towline to use only inconvenience, but also in the production must be prepared with the radius of gyration of the corresponding series of tooling, resulting in a large number of expensive material and financial resources . It is necessary to develop a strain of large towline using a variable radius of gyration to solve these problems.
        3 variable radius of gyration towline board design festival
        Radius of gyration towline depends entirely on the structure plate section , towline is only one reason why the radius of gyration , is due to the structure of a single rotary plate section of the decision. Therefore, the variable radius of gyration towline research , but also as a single radius of gyration towline , the key is how to determine the structure of its board section , and must proceed from a single radius of gyration towline works for analysis.
        Towline turning radius 150 mm from the corner section 28 when the plate "57 / , three key pin is in the up position of the rotation limit . (B), (e), (d) denote the radius of gyration towline R = 20, corresponding section 250,30 mm plate when back corner and keys off limits working position. If more than four scenarios comprehensive and synthetic , that is the state of the work of these four different radius of gyration plate in a plate section of the synthesis section on so after synthesized board section should be towline plate section with radius of gyration of the four same time , we should carefully analyze the distribution plate section with a comprehensive post- hole slots as possible should be uniform and reasonable to ensure that board stiffness and strength of the section . above analysis to verify the design is correct by practice .
        It should be noted in this section of the assembly plate of a towline , the equivalent of four single-turn radius of the drag chain, which in use, according to the actual needs of R = 150,20,250,30 mm from the radius of gyration of the four Choose one of their own combination . Other specifications on the variable radius of gyration plate section design, similar analysis methods available , this does not make more praise later.
        4 towline related manufacturing process
        For the towline reliable performance and high life , not only have the right design , but also need to have a reasonable manufacturing process.
        Thus , combining the development of practice , the following recommendations related to the towline manufacturing process:
        (l) section forming plate punching process should be used to dual flush ( try not to use a single punch ) to ensure that all elements of the relative position of geometric precision and accuracy of this process is critical to product quality.
        (2) After punching plate section should be used to squeeze the ball ( or squeeze mode ) for cold extrusion , in order to improve the hole , groove surface roughness , hardness and resistance to fatigue life, this process a great impact on life .
        ( 3 ) In order to improve the wear life vice towline hinge , preferably a hinge shaft end additional pressure injection cup dry oil to periodically lubricate .
        Conclusion 5 towline problem
        (l) because of a variable radius of gyration towline , the towline has four sets of single-turn radius effect, it is extremely easy to use to create the conditions .
        ( 2 ) In the production for the manufacture of four single-turn radius towline must use fq punching tooling sets or more , while the multi-turn radius of only one set of tooling towline . Thus , more than triple the savings tooling , thus greatly reducing manufacturing costs , especially for mass production.
        ( 3 ) in the production of a variable radius of gyration plate section , the equivalent of four single-turn radius plate section , it can save a lot of raw material consumption , thus greatly improving economic efficiency , especially in mass production .
        Anyway Variable radius of gyration towline Design and Development is an innovative , new design ideas , there are significant economic and social benefits , should be widely applied .