Discussed, the numerical control transformation of 14 lathes, go ahead, analyze and calculate.
Lathe Reforming Design 21 Retrofitting of the longitudinal feed system The feed box and the tow box of the original machine tool were removed, and the mounting hole and pin hole of the original machine feed box were installed, and the stepping motor and the gear box were installed. The ball screw is still placed in the position of the original screw.
Workbench quality Estimated cutting force calculation Cutting power Where = 1 P main motor power, corpse = 7, 5; rI main drive system total efficiency. =0.65; Ki feed system power factor, especially = 0.96.
The friction coefficient on the y rail, =17; W gravity acting on the guide rail, = =1, 309; is the quality of the workbench. Calendar = 133.61; heart is gravity acceleration, heart 9.8ItsJ01 strength calculation ball screw speed t ball screw pitch, = 6 large load 2 =, foot 1 = select the nominal diameter of the ball screw to take the model number, 35061 parent 2 Left, that is, double nut gasket adjustment type, inner circulation circle, ball diameter is 3.969 pitch is 6, the rated dynamic load is 12847 continent 0=8.53, so the strength is sufficient, 2 efficiency meter is matched to the selected ball screw The spiral angle of the screw, =37, the friction angle of 9=10, the transmission efficiency of the ball screw 22 The modification of the transverse feed system The design of the transverse feed system is similar to the design of the longitudinal feed system, and the calculation is omitted.
3 stepping motor and gear selection 31 longitudinal stepping motor selection to determine the step angle of the system to take the pulse equivalent winter, pulse, select step angle 0, = start torque calculation set stepper motor equivalent load torque is negative The cultivation force is based on the principle of conservation of energy. The relative displacement of the moving parts of the motor. 1=Make the mm pulse negative, and if the longitudinal screw does not consider the influence of the inertia of the moving parts at the start, the starting torque is called =. Wide, 5. Take the safety factor. 3, then 4 and = 563, for the stepper motor with the working mode of 5 phase, according to the data, the selection of 150 said 003 type stepping machine is more reasonable. The motor step angle is 0.751.5, the maximum static torque is 20001, the highest no-load starting frequency is 2, and the lateral stepping motor is 13001. The calculation is omitted.
3.2 Gear design in the longitudinal direction step angle 9, = 751.5, ball screw pitch corpse = 6 pulse equivalent, 1! Step, the gear transmission ratio between the stepping motor and the ball screw is =U=9 corpses, 0.75 parent 6=0. The team is selected according to experience, the gear modulus is 1.5. Similarly, horizontal Gear 21 = 22 = 84 gear modulus is calculated from 1.5.
Zhou Zehua. The principle of metal cutting is flawed. Shanghai Shanghai Science and Technology Press, 1984.
Dai Wei. Metal cutting machine tool design. Beijing Mechanical Industry Press, 1985.
Longjiang Mining Institute, majoring in machinery manufacturing and technology, Nanxun Coal Preparation Plant has a comprehensive improvement in equipment. In recent years, Yanzhou Mining Group Corporation Nanxun Coal Mine has made full use of existing or idle equipment and facilities to synthesize the production system of the coal preparation plant. Reconstruction, to meet the expansion and expansion of the ore piece, after the production capacity of the future production of the mine's mixed coal raw coal lifting system put into operation, the three belt conveyors that transport raw coal to the raw coal bunker of the coal preparation plant increased the amount of coal transported, and many times slipped After blocking the chute and other accidents, the production capacity was changed to a large reel after the drive drum was changed to the tailing device of the rubberizing machine. The production capacity was greatly increased. After the new design and modification of the boiler silo and the steam transport precision 2 flushing coal device, the correction was made. Firstly, the conveyor belt runs off the coal, and the conveying capacity of the conveyor belt on the clean coal is improved. The price of the 6 railway product warehouses can be adjusted and the coal can be used for the dead coal. Screening equipment. Pay for the lump coal conveyor belt to speed up, transform, adapt to market changes;
(Finish)
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