The XK5025 machine tool is a domestic vertical lifting table milling machine. Its overall layout and rigidity are better. On the basis of the transformation, the X, Y and Z coordinate axes of the worktable are modified, and the three-coordinate linkage can be realized with the computer numerical control system. The machine tool can be used to machine parts such as straight lines, curves, planes and solid contours. The positioning accuracy and repeatability of the machine tool are high. This machine is an open-loop CNC system. Although it is less used than the servo-driven semi-closed-loop CNC system, it is cheap and reliable, and the structure is compact. It is called “economical†CNC machine tool suitable for China's national conditions. accept.
1 CNC system basic configuration CNC system is widely used for three-coordinate linkage computer control system. The chip contains 4G bytes of ROM, MB bytes of RAM, 16-bit timing, counter and a central processing unit with strong processing functions, 4 8-bit parallel interfaces, and a serial interface. Most of the functional components and buses are not easy to be dry and dissolved inside the chip. It is easy to use shielding and other measures, and it has high reliability and can work in a harsh environment. The system has addition, subtraction, multiplication, division instructions and various logic operations and branch instructions, as well as bit operation multi-byte multiplication and division only need 2! 6 with tool length offset and radius compensation function, self-diagnosis function, It can be automatically accelerated, decelerated, and equipped with a battery. It can be used as a stored power control for power-saving programs during power failures.
1.1 General Industrial PC 1.2 Industrial Control Machine Install 1.44MB floppy disk drive. 38-slot industrial control cabinet with switching power supply)%NEMA 4/12 aluminum waterproof front panel.
1.3PLC input / output 1 built-in PLC input card egg channel / card); 2 built-in PLC output card 8 channels / card) 3 input / output points can be expanded to 198 points.
1.4 Feed system HG.BA3-5B three-phase sine wave hybrid drive and stepper motor.
2 Main functions and scope of application After the CNC transformation of the XK5025 milling machine, the vertical feed of the lifting table still retains the manual function, and the CNC feed can also be manual. The spindle drive system inside the bed is a spindle gearbox composed of shafts, which can realize 30~15 (*e/min adjustment. The inside of the base part of the bed is a cavity and serves as a coolant tank. The lifting of the table is independent. The motor is responsible for the lifting of 8~394mm/min. The numerical control system display and buttons are located on the right side of the operator for easy observation, debugging and operation. The electrical box on the right side of the bed is equipped with the electrical box on the left side of the CNC system bed. The main controller and high-power system are installed inside.
The machine can realize automatic machining such as drilling, milling, boring, reaming, reaming, etc. It can be efficiently processed into parts such as cams, templates, stampers, complex curves, and other tapping functions. This machine is suitable for the customer's scope 1 engineering college mechanism, mechatronics students' comprehensive experiment 2 secondary school, technical school and enterprise CNC machine tool operation skills training 3 medium and small enterprise molds, special-shaped parts processing.
3 power transmission system machine power is 5.5kw, through the elastic coupling and I axis, through 5 axes and its transmission gear; power output to the vertical milling head spindle. On the I axis and (the shaft, there are two sliding double gears and one double gear, which are operated by the shifting mechanism with the shifting fork. A total of 18 kinds of speed can be obtained. The common speed van table horizontal X axis X longitudinal + axis X The vertical division is decelerated by the stepping motor through the first-stage toothed pulley, and is dragged by the ball screw nut pair to move the table along the X-axis, the Y-axis, and the spindle.
In addition, the horizontal, vertical and vertical lifting tables of the work table retain the original manual function for manual operation.
4 Conclusions In recent years, six XK5025 CNC machine tools have been successfully designed and manufactured for four units such as Jinan and Weifang. Two of them are engineering colleges. The machine tool is used as the mechanism of mechanical and mechatronics students. Teaching experiment equipment The other two are private enterprises used to process indexing cams, cylindrical cams and plane cams in a high-precision intermittent indexing mechanism. At present, XK5025 CNC machine tools are playing a huge role in school enterprises.
(Finish)
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