CN101474764B - Stepless speed change adjusting and controlling method for grinding wheel of grinding machine - Google Patents

Abstract

The present invention relates to a continuously variable adjustment control method of abrasive wheel of grinding machine, wherein the method comprises the following steps: providing a grinding machine; measuring an initial distance; setting an initial position #101 of abrasive wheel; setting a coordinate system of initial workpiece; setting a segment difference separation value; actuating the grinding machine and executing a program. The abrasive wheel displaces to the workpiece for grinding after the actuation of grinding machine. An optical scale detects a dynamic distance L' from the abrasive wheel to the surface of workpiece, a dynamic diameter D' of workpiece, and sets a segment difference separating value S. Therefore a program (L'+D')-#101=E and E/S=E' are executed. A servomotor is automatically adjusted to a second period rotating speed if the calculated E' is larger than 1. The servomotor is automatically adjusted to a third period rotating speed if the calculated E' is larger than 2. Thereby the rotation speed of abrasive wheel is automatically adjusted according to the abrasion of abrasive wheel. A stable cutting degree of abrasive wheel is kept for avoiding the loss caused by error artificial setting.

Description

The emery wheel stepless speed change adjusting and controlling method of grinding machine

Technical field

The invention belongs to the technical field of grinding, refer to the emery wheel stepless speed change adjusting and controlling method of a grinding machine especially.

Background technology

The main function of grinding machine is grinding cylinder body, plane or inner hole surface, wherein, grinding machine in order to the grinding cylinder body is the cylinder grinding machine, as milling tool, and the work package thing stays between two thimbles with emery wheel, during grinding, the rotation of emery wheel mining height degree, suitable grinding speed is about 1675m/min to 2000m/min, and work package is slowly rotation of emery wheel do relatively then, to obtain best grinding effect.Yet, the abrasive material of sanded side can and be subjected to the influence of the amount of feeding, work package material and weares and teares along with milling time, therefore, if the speed of mainshaft is identical, when its circle footpath was diminished, linear velocity will be slack-off, therefore need adjust the speed of mainshaft of emery wheel again, make its linear velocity not poor too many, to keep due grinding effect.

Control mode is adjusted speed of grinding wheel by the Frequency Converter Control motor at present, is the degree of wear of being estimated emery wheel by the operator but adjust frequency converter, determines the speed of frequency converter will transfer soon or transfer slowly again.Can cause operator's inconvenience thus, also may make excessive velocities and cause the emery wheel breakage because the operator set mistake, what is more, the worker that the fragment that emery wheel takes place hits the operator pacifies incident.

So existing mode with manual operation adjustment grinding wheel speed has the necessity that is improved in fact.

Summary of the invention

In order to improve above-mentioned disappearance, main purpose of the present invention is to provide a kind of adjustment control method that can adjust grinding wheel speed automatically.

Based on above-mentioned purpose, the step of the emery wheel stepless speed change adjusting and controlling method of grinding machine provided by the present invention comprises:

One grinding machine is provided: described grinding machine has the servo motor that an emery wheel, two thimbles, the optics chis and that can detect displacement for the numerical controller, of input program drive emery wheel, described numerical controller and comprise a program is carried out the rotating speed that described program can be controlled servo motor;

The calculation step of described program comprises:

L＝(D/2)-A；

G55＝X＝(L+D/2)；

(L’+D’)-#101＝E；

E/S＝E’；

Wherein: L is the initial distance of emery wheel to the work package surface;

A is the distance of wheel face to the thimble center;

#101 is the emery wheel initial position;

G55 is the work package initial coordinate;

D is the work package initial diameter;

L ' is in the process of lapping, and emery wheel is to the dynamic distance on work package surface;

D ' is in the process of lapping, the dynamic diameter of work package;

The S section of being difference separation value;

E and E ' are respectively parameter, and the rotating speed of parameter E ' decision servo motor;

Set and import the rotating speed of servo motor: the operator is according to grinding a plurality of stage rotating speeds that the work package material is set servo motor, comprising a phase I rotating speed T1, a second stage rotating speed T2 and a phase III rotating speed T3, T3＞T2 wherein＞T1;

Measure initial distance: measure the distance A value of wheel face to the thimble center;

Set the emery wheel initial position:, be the initial position of emery wheel with the A value input code #101 that is measured;

Set initialization part coordinate system: work package is stayed between two thimbles, measure the outer diameter D value of work package,, promptly calculate the initial distance L value of emery wheel to the work package surface with D value input program, and G55=X=L+D/2;

Set section difference separation value: with section difference separation value S input procedure E/S=E ';

Start grinding machine: with the rotating speed=T1 of servo motor, start grinding machine, allow emery wheel grind, carry out the rotating speed of described programme-control servo motor simultaneously towards the work package displacement;

Automatically adjust the rotating speed of servo motor with described program; In the process of grinding, the optics chi can continue to detect the dynamic distance L ' of emery wheel to the work package surface, and the dynamic diameter D ' of work package, and obtains the value of E ' so as to carrying out described program;

When 1＜E '＜=2, the rotating speed=T2 of control servo motor;

Work as E '＞2, the rotating speed=T3 of control servo motor;

Continuing to carry out described program finishes up to attrition process.

Implement after the above-mentioned technological means, the obtainable concrete benefit of the present invention is:

Because the present invention is in the process of grinding, can be according to the degree of grinding of the wear intensity of emery wheel and work package and calculate E ' value automatically, reference value with E ' value decision servo motor speed change, and then adjust the rotating speed of emery wheel automatically, reach the purpose of automatic adjustment speed change, to improve the disappearance of artificial setting operation.

Description of drawings

Fig. 1 is a flow chart of the present invention.

Fig. 2 measures the floor map of initial distance for the present invention.

Fig. 3 sets the floor map of initialization part coordinate system for the present invention.

Floor map when Fig. 4 grinds for the present invention.

Drawing reference numeral

(10) thimble (20) emery wheel

(30) work package

The specific embodiment

See also flow chart of steps shown in Figure 1, and cooperate shown in Figure 2ly, the step of the emery wheel stepless speed change adjusting and controlling method of grinding machine provided by the present invention comprises:

One grinding machine is provided: described grinding machine has the servo motor that an emery wheel 20, two thimbles 10, the optics chis and that can detect displacement for the numerical controller (not shown), of input program drive emery wheel, described numerical controller and comprise a program, carry out described program and can control the rotating speed of servo motor, the calculation step of described program comprises:

L＝(D/2)-A

G55＝X＝(L+D/2)

(L’+D’)-#101＝E

E/S＝E’

Wherein: L is the initial distance of emery wheel to the work package surface;

A is the distance of wheel face to the thimble center;

#101 is the emery wheel initial position;

G55 is the work package initial coordinate;

D is the work package initial diameter;

L ' is in the process of lapping, and emery wheel is to the dynamic distance on work package surface;

D ' is in the process of lapping, the dynamic diameter of work package;

The S section of being difference separation value;

E and E ' are respectively parameter, and the rotating speed of parameter E ' decision servo motor;

Set and import the rotating speed of servo motor: the operator is according to grinding a plurality of stage rotating speeds that the work package material is set servo motor, comprising a phase I rotating speed T1, a second stage rotating speed T2 and a phase III rotating speed T3, T3＞T2 wherein＞T1;

Measure initial distance: measure the distance A value at emery wheel 20 surfaces to thimble 10 centers, because emery wheel is after grinding, what can wear away and diminish its external diameter, therefore, need in the past to measure initial distance A value earlier in in-cycle work, determine the initial position of emery wheel;

Set the emery wheel initial position:, be the initial position of emery wheel with the A value input code #101 that is measured;

Set initialization part coordinate system: see also shown in Figure 3, work package 30 is stayed between two thimbles 10, measure the outer diameter D value of work package 30, D value input program, promptly calculate the initial distance L value of emery wheel to work package 30 surfaces, and G55=X=L+D/2;

Set section difference separation value: with section difference separation value S input procedure E/S=E ', described separation value can be 10mm or 15mm or other numerical value, set according to the operator, if when making emery wheel 20 be able to apace the conversion rotating speed, S is set at little value with section difference separation value, otherwise,, described section poor separation value can be made as big value if do not need to make emery wheel 20 conversion rotating speed soon;

Start grinding machine and performing a programme: see also shown in Figure 4, rotating speed=T1 with servo motor starts grinding machine, emery wheel 20 can grind towards work package 30 displacements, the while performing a programme (L '+D ')-#101=E and E/S=E ', described L ' is the dynamic distance of emery wheel 20 to work package 30 surfaces, and the dynamic diameter of D ' when to be work package 30 grind, the process medium plain emery wheel 20 that grinds is by the dynamic distance L ' of initial position #101 to work package 30 surfaces, and the dynamic diameter D ' of work package 30 can change, automatically detect L ' by the optics chi, D ', performing a programme (L '+D ')-#101=E and E/S=E ', described E value and E ' value are also along with change, if gained E ' value is greater than 1 and smaller or equal to 2 o'clock, it is the 2nd stage rotating speed T2 that servo motor increases automatically, if gained E ' value is greater than 2 o'clock, and it is the 3rd stage rotating speed T3 that servo motor increases automatically.

By above-mentioned steps, in process of lapping, can adjust the rotating speed of servo motor automatically according to the wear intensity of emery wheel, make emery wheel keep stable cutting degree, do not need the operator to adjust setting voluntarily, can prevent to set mistake.

Claims (1)

1. the emery wheel stepless speed change adjusting and controlling method of a grinding machine is characterized in that, the step of the emery wheel stepless speed change adjusting and controlling method of described grinding machine comprises:

One grinding machine is provided: described grinding machine has the servo motor that an emery wheel, two thimbles, the optics chis and that can detect displacement for the numerical controller, of input program drive emery wheel, described numerical controller and comprise a program is carried out the rotating speed that described program can be controlled servo motor;

The calculation step of described program comprises:

L＝(D/2)-A；

G55＝X＝(L+D/2)；

(L’+D’)-#101＝E；

E/S＝E’；

Wherein: L is the initial distance of emery wheel to the work package surface;

A is the distance of wheel face to the thimble center;

#101 is the emery wheel initial position;

G55 is the work package initial coordinate;

D is the work package initial diameter;

L ' is in the process of lapping, and emery wheel is to the dynamic distance on work package surface;

D ' is in the process of lapping, the dynamic diameter of work package;

The S section of being difference separation value;

E and E ' are respectively parameter, and the rotating speed of parameter E ' decision servo motor;

Set and import the rotating speed of servo motor: the operator is according to grinding a plurality of stage rotating speeds that the work package material is set servo motor, comprising a phase I rotating speed T1, a second stage rotating speed T2 and a phase III rotating speed T3, T3＞T2 wherein＞T1;

Measure initial distance: measure the distance A value of wheel face to the thimble center;

Set the emery wheel initial position:, be the initial position of emery wheel with the A value input code #101 that is measured;

Set initialization part coordinate system: work package is stayed between two thimbles, measure the outer diameter D value of work package,, promptly calculate the initial distance L value of emery wheel to the work package surface with D value input program, and G55=X=L+D/2;

Set section difference separation value: with section difference separation value S input procedure E/S=E ';

Start grinding machine: with the rotating speed=T1 of servo motor, start grinding machine, allow emery wheel grind, carry out the rotating speed of described programme-control servo motor simultaneously towards the work package displacement;

Automatically adjust the rotating speed of servo motor with described program; In the process of grinding, the optics chi can continue to detect the dynamic distance L ' of emery wheel to the work package surface, and the dynamic diameter D ' of work package, and obtains the value of E ' so as to carrying out described program;

When 1＜E '＜=2, the rotating speed=T2 of control servo motor;

Work as E '＞2, the rotating speed=T3 of control servo motor;

Continuing to carry out described program finishes up to attrition process.

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