The open-loop servo system is controlled by a 14-inch microcomputer.
A 4-position rotary tool holder is used.
The modified machine structure 1 is on the next page. The main technical indicators of the machine tool are as follows: the maximum workpiece rotation diameter of the bed is 400, the maximum workpiece rotation diameter on the skateboard is 2, the maximum machining workpiece length is the minimum. The unit knife milk is lost, the speed is 4.5, the mountain, the axis is 3.6; the pulse, the axis It is 0.005 and the 2 axis is 0.0! The tool holder rotary repeat positioning accuracy 0.07 axis positioning accuracy 005, 2-axis repeat positioning accuracy 0.015mm; X-axis positioning accuracy Q045m called X-axis repeat positioning accuracy 0.010mm.
2 Main steps of lathe modification 21 Feeding system 21.1 Longitudinal feed system 2 Remove the slide bar and the mounting seat of the original machine tool, with the ball screw and the corresponding mounting device. Longitudinal pulse when the lead screw pitch 56.
1. Main motor; 2 electrical cabinet; 3., shaft motor; 4. Cooling pump; 5 B to the carriage; 6. Tailstock; 7. Bed body; 8. Dad electric 19. Code different 10. Ten copy 1 Control 褚 128 step, car; 13. Spindle box.
Selecting the 8 type stepping motor of the factory, the reduction ratio is 54 and the torque is kept 12. 25. The system gear reduction stepping motor is specially equipped for the motor of the machine system, which is added on the basis of the 0-reaction stepping 1 The upper gear is reduced and the device is composed, which is suitable for the numerical control system. The stepping motor is connected to the ball screw pair via the gapless coupling, and transmits the drag torque to the ball screw pair, which drives the carriage to move in the longitudinal direction to 5. Ball screw 461.
The ball screw is pre-tightened to reduce or eliminate the wire hit. The resulting distortion of the curve causes the screw to be pulled and pressed with a large rigidity, and the lead screw does not elongate due to heat generation.
21.2 The infeed system 3 is connected to the ball screw 325 via a gapless coupling.
2.2 CNC system uses Jiada microcomputer numerical control system. The system is compact, economical and easy to operate. It has programmed shape simulation pitch compensation, user panel and other modules. The entire unit is installed in the operating box, which can be moved with the pallet, and the remaining appliances are installed in a separate electrical box.
23 rotary tool holder, 41 type system 4-station automatic tool holder. The rotary tool holder has high repeating positioning precision, good working rigidity, long service life and good craftability.
3 encountered problems and solutions during the test cutting operation, sometimes the spindle stops or runs at very slow speed, 01 actual spindle speed is the reason is according to the original design, after the shift is completed, the relevant solenoid valve is broken The electric reset hydraulic system no longer supplies oil to the shifting cylinder; in the case of cutting, the main shaft shifting gear is axially displaced by the force, and the detection signal of the gear disappears. Solution The program is changed so that the electromagnetic related to the small shaft continues to be energized after the end of the shift, and the hydraulic system continues to apply pressure to the cylinder piston.
The slide rail of the carriage is missing. The reason is that the sliding force between the sliding guides of the Kunming carriage is large. Solve the 77 method of bonding polyvinyl fluoride on the rail surface, equipped with a lubrication system with a reasonable distribution of sufficient oil.
Responsible editing school Zhao Heming
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