The line of the products that place of machining industry cylindrical grinder machines is various, workpiece size measurement is different, the requirement machines precision each different. Rotate speed of relative requirement emery wheel differs at the linear velocity of main shaft, pure adjustment the treatment linear velocity that the rotate speed of main shaft will come to satisfy workpiece adjusts good position very hard. As a result of axial lever kind the stress that produces in machining a process bends, the moment that can produce emery wheel feed in grinding process is different, bring emery wheel to output rotate speed so / the change with distinct moment of force, corresponding meeting produces Zhen Daowen / the grain that burn paste, grinding precision assures very hard, cause production from this efficiency is low, high-quality goods rate is low. As the development of technology of electric power electron, of frequency control technology gain ground more and more, very good result is gotten in the application of machining industry transducer. The stepless speed regulation of transducer, soft start, huge of constant torsion output satisfied machining equipment to be spent to constant speed / the requirement of constant torsion. 1, the axial lever with the load performance different basis that cylindrical grinder machines kind diametical size, advocate the rotate speed that the rotate speed of emery wheel electromotor is equal to emery wheel to output. The size of grinding force depends on the output torsion of emery wheel electromotor. The high speed of the main shaft electromotor that rotates in drive workpiece paragraph, the photograph is changeless to outputting rotate speed at emery wheel, machines workpiece diameter is small, grinding feed is little; Machine big diameter, long axis kind when workpiece, the electromotor that workpiece rotates is in low speed paragraph, emery wheel feed is big, force of emery wheel grinding also is in greaten, electromotor is in very hard constant torsion / move below constant speed. The change of speed arose to be like Zhen Daowen / the grain that burn paste / the change that machines precision to wait. The stepless speed regulation of frequency control electromotor, constant torsion output just can remedy afore-mentioned flaw. 2, the characteristic that the choice of transducer runs according to the system, the use requirement that considers contented machining cylindrical grinder and isogon of installation cost charge spend a consideration, choose the vector that takes automatic torsion to promote a function transducer. With SANCH- S2000 the department is labelled exemple, differ according to the power of emery wheel electromotor choose 18. The transducer of 5KW/15KW, it is with 15KW exemple, 380V of rated voltage three-phase, output voltaic 32A, frequency is controlled 0.
5, 400HZ, speed is controlled 0.
1% , overload ability 150%/60S. Have automatic torsion to promote a function, flexible PWM control, can realize lower noise to move, 10 paragraphs over rotate speed is controlled. 3, of the system start with timing cylindrical grinder advocate starting circuit of emery wheel electromotor uses a heavenly body more, trigonometry changeover starts circuit. Replace original circuit with transducer, use original contactor often open what contact controls transducer to move, what consideration emery wheel starts is inertial, set of the flexible time that start is transducer 10S, stop brake time set to be 15S, start pitching moment to be able to be in according to the emery wheel of different type 50%- - 80% between adjust set. Systematic speed is passed outside receive adjustable potentiometer adjustment frequency, get used to speed to adjust according to what workpiece diameter differs, because bear the mechanical intensity when electromotor high speed / noise / the limitation of the element such as vibration, highest frequency set is electromotor 60HZ; Because the electromotor when low speed comes loose,hot effect is differred, consider the gearshift element that workpiece rotates and measure of work of effective the biggest treatment, lowermost frequency set is 35HZ, fiducial frequency set is 50HZ. Analyse by the load performance in front knowable, quality of power of high speed Duan Weiheng, property of torsion of low speed Duan Weiheng, and laden requirement torsion is big when low rotate speed, overload capability is strong. CNC Milling
CNC Machining