Axial fan of the metal spinning wheel

Traditionally, relatively backward axial fan wheel plant processes are generally carried out by three-roll rolling and then welding rough shape, and then mechanical finishing, because of this backward processing technology result in wheel size tolerance and geometric tolerance can not be effectively guaranteed, and the impact of stress and deformation due to welding, but also led to reduced accuracy of fans, affecting the efficiency of fans, some of China's Zhejiang Blower Factory manufactured using deep-drawing mold wheel, but only a very individual product models, because the large size of the mold wheel and costly, and the need for matching the pressure of thousands of tonnage machines can be implemented, while the spinning tire manufacturing cost is only a drawing die 1 / 20 or so, or even less, and the spinning tire with the processing cycle is more than a short drawing die, and for the fans varieties, small batch of products is extremely desirable characteristics, Figure 1 is a contemporary spin machine tool companies use P700 & Poor's Q235 materials used in the 6mm thick steel plate processing axis (oblique) flow blower wheel 1 meter in diameter and the thickness of 1mm for the diversion of the wheel cover.

As the spinning process of the metal surface hardening now, will spin the rear wheel damage strength test specimens obtained and with the spinning before the comparison with the kinds of materials, strength increased by 28%, with a thickness of 6mm steel plate after spinning basically the equivalent of the original Hub traditionally carried out using three rollers roll thick

Degree in 8mm steel plate manufactured in the same wheel strength. After spinning machine parts, such as molding mold like the drawing will also appear at its end of the thinning metal per year, but part of a different mold deep drawing sheet metal forming wheel of thinning the amount of thinning in the metal plate bends at the amount of maximum, while the spinning wheel after the thinning of the amount of metal plate is spinning in his only client, so for the fans of the work characteristics, spinning wheel than in mold forming wheel drawing processing technology more reasonable. Contemporary companies used to use 6mm thick steel plate Q235 materials produced by the end of the wheel at least up to 5.4mm, are available through the speed test completely safe. Worthy of note are: drawing mold forming its front wheel center pit as deep-drawing forming wheel mold process reasons, can not be too deep, thus supporting the need to increase electrical axis, while the manufacturing process using spinning its front wheels Center pit depth measurements to determine the motor according to ordinary standards, there is no process difficult. In the manufacture of wheel spinning process should pay attention to several points: 1, spinning wheel, under the flat blank to use cold material, we can not simply use of gas cutting, because the gas is cut off when the oxygen feed temperature will cut metal grain growth, plastic lower occurred in the spinning process ends cracking, easy to shape. 2, wheel hub center of its front-pit cone angle should be bigger, because the metal plate shear thinning amount of spin to follow the basic rules are: thickness δ × sinα, according to our general results of the actual processing of the wheel hub center of its front-pit cone angle 900, when, 6mm steel wheels of its front-end production center pit cone angle of about thinning thickness δ × 0.86 or so. Spinning wheel of skilled workers, technical experience requirements are very high, each product must be the preparation of the corresponding part of the process file and need to have field-proven technology products to preliminary examination of documents is reasonable or not, the main process parameters set as follows: pass , spindle speed and optimize the speed of walking a knife, when parts of qualified technology mature in the first attempt, a very low rejection rate.