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In modern industrial production, along with high-precision, high-speed, high quality requirements rising, bearing role is increasingly prominent, increasingly intensified its dependence of the various types of mechanical and electrical equipment, steel balls as bearing the main parts, its quality precision bearings, operating performance, life has a crucial impact. Statistics show that by the Group of the experiment axis Kazakhstan: in the form of bearing failure due to the ball surface defects caused the crack, cracks caused by bearing failure up to 65%. Therefore, in the production must be ball surface quality, especially on the crack, the crack rigorous testing. At present, the domestic steel ball manufacturers using the artificial visual inspection method which not only takes up a lot of manpower, limited vision, often undetected can not ensure that the steel ball quality. With the continuous improvement of the quality requirements of the steel ball of the bearing industry, there is an urgent need for an automatic detection device to correctly and effectively check the ball surface defects. The main task of this paper steel ball surface defect image detector structure design, in order to ensure that the feed of the ball in the automatic detection process, transmit, expand, and sorting. First constructed in the design of the mechanical structure of the overall framework of the detector, the overall design, the basic requirements of the design and based on UG structural design technology roadmap; then key technologies in the structural design of the detector: Ball surface expansion theory study Considering the various practical factors obtained Ball the space image acquisition model under different conditions; designed the initial structure of the steel ball defect detector, given the overall assembly drawing, and expand in radial wheel test bed design, for example design based on the size of the link between technology modeling method of assembly features and components; Finally, the use of parametric design method to design the parts, a rule curve hybrid modeling method combined with the free-form surface characteristics relative to generate radial expansion round solid model, part family detector 3D standard parts library. This article parametric design method, the virtual assembly technology applied to the Ball defect detector structure design, not only to complete the detection prototype various parts of the design, but also shorten the design time, improve design accuracy for the whole of the ball detector machine trial provide technical assurance.
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