CN103753400A

CN103753400A - Failure prediction and self-recovery method for numerically-controlled grinding machine control system

Info

Publication number: CN103753400A
Application number: CN201410029113.4A
Authority: CN
Inventors: 孟旭炯; 邬惠峰; 戴钧
Original assignee: Hangzhou Dianzi University
Current assignee: Hangzhou Dianzi University
Priority date: 2014-01-22
Filing date: 2014-01-22
Publication date: 2014-04-30
Anticipated expiration: 2034-01-22
Also published as: CN103753400B

Abstract

The invention relates to a failure prediction and self-recovery method for a numerically-controlled grinding machine control system. The failure prediction and self-recovery method for the numerically-controlled grinding machine control system specifically comprises the steps that on-line state marking and storing are conducted on the state of a grinding machine, early warning of a failure of the grinding machine is conducted according to the stored state mark, and self-recovery is conducted by a control system according to the stored state mark when the failure occurs on the grinding machine. According to the failure prediction and self-recovery method for the numerically-controlled grinding machine control system, on-line marking and storing of the state of the grinding machine can be achieved, early warning can be given when it is detected that the state of the grinding machine is abnormal, and self-recovery can be conducted by the control system according to the stored mark after the failure occurs on the grinding machine. The failure prediction and self-recovery method for the numerically-controlled grinding machine control system has the advantages that the reliability and the automation degree of the system are extremely high, the machining efficiency can be improved, and the service life of the grinding machine can be prolonged.

Description

A kind of failure predication for numerically control grinder control system and self-recovery method

Technical field

The present invention relates to a kind of failure predication for numerically control grinder and self-recovery method, is a kind of failure predication and self-recovery method of the two servo intelligent numerically control grinder control systems for machining bearing bear inner ring grooved railway specifically.

Background technology

Bearing is the common components for machine-building, and the quality of bearing performance often produces material impact to mechanical performance, and particularly for some precision instruments, parts of bearings can produce crucial impact to instrument performance.China's current axis holds manufacture level, and with international most advanced level, also there is a big difference, domestic bearing grinder is mainly manifested in several aspects with external advanced bearing grinder gap: first, the automatization level of domestic grinding machine is lower, need more manpower to participate in production and go, this can increase the labor cost of Production of bearing producer virtually; Secondly, the poor robustness of system, system is prone to fault; In addition, the domestic grinding machine research and development design cycle is longer, and domestic grinding machine compares with the advanced grinding machine of foreign same type the gap that had for one or two generation.

Current domestic numerical control grinding machine intelligent level is lower, domestic grinding machine only can be realized the simple automated production of initial stage, after workman sets the operational factor of machine, machine can move automatically, once but machine (for example in running, break down, workpiece comes off, system power failure), the automatic operation of machine will go wrong, and just needs this time product line worker manually to solve, reduced operating efficiency, and disturbed by artifact.

Goal of the invention

For the problems referred to above of current numerically control grinder existence, the present invention proposes a kind of failure predication and self-recovery method of the numerically control grinder control system for machining bearing bear inner ring grooved railway.

Technical scheme of the present invention is as follows:

The present invention carries out presence mark and preservation to grinding machine state; According to the status indication grinding machine fault that gives warning in advance of preserving; After grinding machine breaks down, control system is recovered automatically according to the status indication of preserving.

Described grinding machine state carries out presence mark and preservation, specifically: grinding machine state is detected, if find that this next state is consistent with last time, counts and adds up and upgrade the state of last time; If inconsistent, as a new state, making its Count of Status value is 1, adds in the power down protection district of controller.

Described according to the status indication of the preserving grinding machine fault that gives warning in advance, specifically: repeat to add man-hour, by the count value of current state relatively and the count value of preservation state carry out early warning.

Described automatic recovery, specifically: grinding machine state is segmented, to the fault under different conditions, in man-machine interface, configure different restoration schedules.

Beneficial effect of the present invention is: make native system have extreme high reliability and automatization level, can improve working (machining) efficiency, extend grinding machine service life.

Accompanying drawing explanation

Fig. 1 composition of the control system block diagram.

The specific embodiment

Below in conjunction with accompanying drawing, the invention will be further described.

As shown in Figure 1, the numerically control grinder control system based on figure programming adopts two 32 embedded chips as control core, is aided with peripheral components and forms control system hardware, forms whole control system hardware.This can have stronger disposal ability and lower cost than general PLC by Guarantee control system; Adopt the form of ladder diagram to design grinding machine control algolithm, and integrated failure predication and self-recovery method.Ladder diagram is easy to learn, and ladder diagram can realize modularization programming, can improve the reusability of code, and trapezoid figure program ratio is easier to read, and is beneficial to regular maintenance, can greatly shorten the construction cycle, reduces maintenance cost.

When grinding machine is during in automatic running status, mechanical action can be regarded as by following state and form: in the middle of material loading-> material loading pressure-> upper magnetic-> grinding-> demagnetization-> blanking->, extract-> of pressure-> blanking-> blanking pressure-> fills in.In said process, from centre, being pressed onto and extracting this holding function is discharging, if manipulator goes feeding port feeding in the situation that having material, can cause the damage of mechanical part, and in the time of must guaranteeing that manipulator is filled at blanking pressure place, manipulator is without material for this reason.There is following several situation may cause manipulator before filling in, to have material: 1, under automatic operational mode, in feeding process, manipulator is not also pressed emergent stopping when press centre; 2,, under manual mode, user causes machine in unknown state without continuous operation; 3, the unexpected power-off of machine in running.Above-mentioned these situations all can cause machine normally to move, and need to set back.Mainly containing at present two kinds of methods solves: 1, by the manual mode of workman, solve, workman is by judging the residing state of machine to the observation of machine, then according to judged result, move accordingly, make machine reposition, but this kind of method greatly reduces the automatization level of machine, can increase the labor cost of enterprise.2, no matter machine, in where, all sets back according to same order, this kind of method is simple, but easily there was a mechanical failure.

Innovative point of the present invention is to have proposed a kind of failure predication and automatic recovery method, can carry out in wire tag and preservation grinding machine state; When abnormal state being detected, can carry out early warning; After grinding machine breaks down, control system is recovered automatically according to the mark of preserving.Numerically control grinder is a limited system; there is limited machine part and mechanical action; mechanical action and IO correspondence; therefore can adopt the method mark grinding machine state of mark IO state; and mark value is saved in to power down protection district, the variation each time of machine IO all can be recorded corresponding status indication value and counting thereof.Repeating during processing parts, if at the counting of abnormal of some states, or there is not this state at all, can the processing of premature termination epicycle.Fault recovery is, according to status indication value, mechanical recovery is arrived to mechanical origin, for different malfunctions, has different recovery order and sequential, and this can set by man-machine interface.

Such as: note material loading state is S1, adds up its Count of Status C1, until material loading presses signal effective, is now denoted as state S2, is counted as accordingly C2; After S2 is in stable condition, start to carry out magnetic action, be denoted as S3, be counted as C3.If certain adds man-hour, C3 counting is excessive, and prompting in man-machine interface " upper magnetic fault ", stops pressurization, by the preset value time delay set time, gets back to state 1.If broken down suddenly under grinding state (S4), control system automatically performs the middle extract-> of pressure-> of follow-up demagnetization-> blanking-> blanking-> blanking pressure-> and fills in process, keep flexibility and the integrality of operating process, reduce the impact to system.

Claims

1. for failure predication and the self-recovery method of numerically control grinder control system, it is characterized in that the method is specifically:

Grinding machine state is carried out to presence mark and preservation; According to the status indication grinding machine fault that gives warning in advance of preserving; After grinding machine breaks down, control system is recovered automatically according to the status indication of preserving;

Described grinding machine state carries out presence mark and preservation, specifically: grinding machine state is detected, if find that this next state is consistent with last time, counts and adds up and upgrade the state of last time; If inconsistent, as a new state, making its Count of Status value is 1, adds in the power down protection district of controller;

Described according to the status indication of the preserving grinding machine fault that gives warning in advance, specifically: repeat to add man-hour, by the count value of current state relatively and the count value of preservation state carry out early warning;