CN2313237Y

CN2313237Y - Economic control device of numerical-control machine tool

Info

Publication number: CN2313237Y
Application number: CN 97231740
Authority: CN
Inventors: 李永旭
Original assignee: SHENYANG INST OF COMPUTING TEC
Current assignee: SHENYANG INST OF COMPUTING TEC
Priority date: 1997-12-26
Filing date: 1997-12-26
Publication date: 1999-04-07
Anticipated expiration: 2007-12-26

Abstract

The utility model belongs to a control device of a numerically controlled machine tool. The structure of the utility model is composed of four microcontrollers in an 8052 series: one D80C320 series and three 89C2051 series. Clocks are all in 24MHz. The real-time control of a numerically controlled lathe and interpolation calculation in processing process are cooperatively completed. The utility model is provided with six operating conditions: MDI, editing, starting, dry running, manual operation and return to zero. A circuit is provided with a shaft CPU, a coordinate display CPU, and an auxiliary function CPU which are mutually connected for teamwork. The utility model has the advantages that the division of the work of the modular design of the device is definite and reasonable, and simple circuit structure and high reliability and high stability of the device are realized; therefore, the utility model can be suitable for using in different industrial environment.

Description

The low-cost type CNC lathe control device

The utility model belongs to a kind of control device of numerically-controlled machine.

At present, in the middle of some precision optical machinery processing, numerically controlled lathe is widely used, its advantage is the machining precision height, the automaticity height, need not with artificial all manual operations, as long as be input to computing machine finishing job sequence in advance, then machine carries out process operation by machine program, and the current numerically controlled lathe that uses in some enterprises mostly is middle and later periods eighties product, realizes open loop control, step motor drive, generally can satisfy the needs of most of enterprise practical processing, still middle-size and small-size at some promptly is that economical CNC system really has not enough problem, and system reliability is poor, stability is not good, the function imperfection, shortcomings such as inconvenient operation are given full-automatic, high-precision requirement processing is made troubles.

For solving the mach deficiency of low-cost type CNC lathe, the purpose of this utility model provides a kind of low-cost type CNC lathe control device, utilize microcontroller embedded function and abundant external interface device to realize the complex operations of lathe, to reach the purpose of processing global reliability and consummating function.

The structural design of the utility model is achieved in that the core of this control device is made up of the microcontroller of four 8051 series, one is DS80C320, three is 89C2051, clock is 24MHZ, their collaborative real-time control and interpolations in the process of finishing numerically controlled lathe are calculated, its block diagram (as shown in Figure 1), host CPU by bus respectively with axle CPU, the user program area, the device program area, the device display circuit, the input and output latch cicuit, keyboard scanning circuit, axial coordinate shows, subsidiary function CPU connects, the input and output latch cicuit connects with imput output circuit, keyboard scanning circuit connects with keyboard, axle CPU is by the device driving circuit, and stepper motor driver connects with stepper motor.

Wherein host CPU circuit part structure (as shown in Figure 2) is at the address date multiplex bus U of host CPU ₁₂(be connected with memory under program U on the PO mouth of 80C31 ₉(27C256), user program memory U ₇(62C256) programmable interface device U ₁₃(82C55) with two data isolation device U ₁₄, U ₂₂(74HC245); Axle cpu circuit structure (as shown in Figure 3), the drive signal of stepper motor are that the C mouth by 82C55 transmits in the center mode, and its connection is that the C mouth of 82C55 is connected to U ₈(AT89C2051) interrupting input end, axle CPU, U ₈Output is through U ₆And U ₄A, D, B, E (74LS07) input end joins, be output as low effective drive signal X ±, Z ±, coordinate shows the principle of work and axle CPU the same substantially (as shown in Figure 4) of CPU, demonstration CPU D ₁₃(AT89T2051) P _IMouth and data latches D ₁₄(74LS373) data terminal joins, and data are the charactron tube font, simultaneously CPU again with code translator D ₁₅(74LS154) input end joins, the calculated address, and output connects switch triode 9015, lights corresponding charactron, subsidiary function CPU D ₁₃(AT89C2051) inserted and the 82C55A mouth by changeing by bus, B mouth corresponding positions connects, and is switched by host CPU recognition machine work completion status, and last input and output I/O interface circuit is an output signal, by I/O bus and latch U ₁₉, U ₂₀, U ₂₁, U ₈₁Input end joins, and power three plate pipe A1241 drove output (as shown in Figure 6) during its output directly drove through isolator TLP521, and it is input as the TLP521 isolation and is input to bus driver U ₁₅～U ₁₈Its output is exported by the I/O bus driver, finish the full-automatic processing of part at auto state, in this course, machine is finished reading of each section parts program and interpretation work by host CPU, carries out necessary interpolation and calculates, and the result is delivered to a CPU and shows CPU, host CPU also will carry out necessary I/O state-detection and control, to adapt to the needs of processing.

The advantage of the utility model: the apparatus module division of design is clearly reasonable, realizes that circuit structure is simple, device reliability, and stability is high, can be fit to various industrial environments and use.

The structure of the utility model, principle of work reach accompanying drawing in conjunction with the embodiments and are illustrated.

Fig. 1 is a low-cost type CNC lathe control device overall block-diagram;

Fig. 2 is a low-cost type CNC lathe control device host CPU electrical schematic diagram;

Fig. 3 is a low-cost type CNC lathe control device axle CPU electrical schematic diagram;

Fig. 4 is that low-cost type CNC lathe control device coordinate shows the CPU electrical schematic diagram;

Fig. 5 is a low-cost type CNC lathe control device aiding CPU electrical schematic diagram;

Fig. 6 is low-cost type CNC lathe control device output electrical schematic diagram;

Fig. 7 is low-cost type CNC lathe control device input electrical schematic diagram.

Its principle of work is as shown in drawings:

Whole device have six kinds of device duties (MDI, editor, automatically, dry running, manually, return zero), feeding multiplying power that all works when any motion is repaiied and is transferred device and three kinds of back work states (single hop is carried out, leapfrog is carried out, point advance to drive) control device.The switching of machine works state and feeding times thing is selected respectively by two waver controls, the back work state is three separate dustproof buttons, can freely overturn, its input signal is gathered by a 89C2051, become the monostable level signal by software processes, deliver to host CPU, use man-hour for adding, this 89C2051 also will drive the corresponding state pilot lamp simultaneously, the secondary status that prompting operation person is current, the feeding multiplying power is repaiied to transfer and is had five grades (1%, 5%, 50%, 75%, 100%), the output signal of waver through encoding compression, was saved the signal wire expense before delivering to host CPU.All these signals are isolated through 82C55, are received by host CPU from the PO mouth with the form of 8 bit data;

In editing mode; the operator is except setting up necessary device configuration file (No. 0% program); can also be input in the NC device by the nc program of keyboard part; be stored in the user program area; also can parts program be input in the NC device by serial ports (RS-232) with computing machine; be stored in the user program area; when machine is electric down; user program can be preserved three months under the protection of reserve battery; configuration file has been described the in use necessary parameter of machine, as: the job sequence name; maximum rapid traverse speed; same during tool changing; the gap compensation; cutter compensation etc.

Finish the full-automatic processing of part at auto state, make qualified product, in this course, control device is finished reading of each section parts program and interpretation work by host CPU, carrying out necessary interpolation calculates, the result is delivered to a CPU (drive leading screw and knife rest by its drive stepping motor, realize cut) and show CPU (show in real time in the process X-axis and Z axle definitely or relative coordinate position), in process, host CPU also will carry out necessary I/O state-detection and control, to adapt to the needs of processing;

The tool structure of low-cost type CNC lathe control device has been passed through reliability design; high anti-jamming capacity design and the design of maintainable operability; the layout of front panel has handled easily; the characteristics of maximum information indicating; and four CPU architectures of device and fraction have utilized limited software and hardware resources maximumly; in drive signal output, adopt the two poles of the earth programming device to design the application of the antisurge TVS protection of output signal type and signal in advance; axial coordinate shows the belt data timesharing scanner uni external data serial received circuit of the single CPU of utilization, and the direct current 24V photoelectricity of 200mA is isolated fan-out capability.

Claims

1. low-cost type CNC lathe control device, the core that it is characterized in that control device is made up of the microcontroller of four 8051 series, one is DS80C320, three is 89C2051, clock is 24MHZ, their collaborative real-time control and interpolations in the process of finishing numerically controlled lathe are calculated, host CPU by bus respectively with axle CPU, the user program area, the device program area, the device display circuit, the input and output latch cicuit, keyboard scanning circuit, axial coordinate shows, subsidiary function CPU connects, the input and output latch cicuit connects with imput output circuit, keyboard scanning circuit connects with keyboard, axle CPU is by the device driving circuit, and stepper motor driver connects with stepper motor; Host CPU circuit part structure wherein is at the address date multiplex bus U of host CPU ₁₂Be connected with memory under program U on the PO mouth (80C31) ₉(27C256), user program memory U ₇(62C256) programmable interface device U ₁₈(82C5 and two data isolation device U ₁₄, U ₂₂(74HC245).

2. by the described control device of claim 1, it is characterized in that a cpu circuit structure is that the drive signal of stepper motor is that C mouth by 82C55 transmits in the center mode, its connection is that the C mouth of 82C55 is connected to U ₈(AT89C2051) interrupting input end, axle CPU, U ₈Output is through U ₆And U ₄A, D, B, E (74LS07) input end joins, be output as low effective drive signal X ±, Z ±.

3. by the described control device of claim 1, it is characterized in that coordinate shows that the structure of CPU is for showing CPU D ₁₃(AT89T2051) P _IMouth and data latches D ₁₄(74LS373) data terminal joins, and data are the charactron tube font, simultaneously CPU again with code translator D ₁₅(74LS154) input end joins, the calculated address, and output connects switch triode 9015, lights corresponding charactron.

4. by the described control device of claim 1, it is characterized in that subsidiary function cpu circuit structure is D ₁₃(AT89C2051) inserted and the 82C55A mouth by changeing by bus, B mouth corresponding positions connects, and is switched by host CPU recognition machine work completion status, and last input and output I/O interface circuit is an output signal, by I/O bus and latch U ₁₉, U ₂₀, U ₂₁, U ₃₁Input end joins, and pliotron A1241 drove output during its output directly drove through isolator TLP521, and it is input as the TLP521 isolation and is input to bus driver U ₁₅～U ₁₈, its output is exported by the I/O bus driver.