CN118342333A - Non-contact type numerical control machine tool precision detection device and method - Google Patents
Non-contact type numerical control machine tool precision detection device and method Download PDFInfo
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Abstract
The invention discloses a non-contact type numerical control machine tool precision detection device and a method, which belong to the technical field of machine tool detection, and comprise a detector and are characterized in that: still include electrical control cabinet, wireless signal transmitter and wireless signal receiver, the detector includes mounting plate, fixed bolster, goes up C type support, lower C type support and a plurality of sensor, fixed bolster vertical fixed connection is on mounting plate, goes up C type support and fixes the upper end at the fixed bolster, and lower C type support is fixed the lower extreme at the fixed bolster, go up C type support and the inboard of lower C type support all are provided with the sensor, the sensor is connected with wireless signal transmitter electricity. The invention can finish dynamic precision detection of the radial and axial deflection of the main shaft and the thermal elongation under the required rotating speed, the measured body is not contacted with the measured body, the measurement contact error is reduced, and the detection precision can be effectively improved.
Description
Technical Field
The invention relates to the technical field of machine tool detection, in particular to a non-contact type numerical control machine tool precision detection device and method.
Background
At present, aiming at a numerical control machine tool, the position and the posture of a magnetic meter seat are required to be frequently adjusted when the machine tool is detected, the coordinate axis of the machine tool is manually moved for checking, time and labor are wasted, the machining utilization rate of the machine tool is affected, errors are easily introduced in manual operation, and the reliability of a detection result is low.
The Chinese patent document with publication number CN112008491A and publication date 2020, 12 month and 01 discloses a measuring head-based RTCP precision calibration method of a CA type five-axis numerical control machine tool, which comprises the following steps:
s1, installing a calibration block on a workbench, installing a measuring head on a main shaft and activating;
s2, under the condition that the C axis is kept to be 0 degree, the A axis sequentially contacts with the calibration block from top to bottom at 0 degree and other angles symmetrical by 0 degree, and the same A axis angle is required to measure corresponding point position coordinates at the angles of 0 degree and 180 degrees of the main axis;
s3, calculating errors of the axis A and the spindle in the Y direction and errors of the rotation center of the axis A and the rotation plane of the spindle;
s4, under the condition that the A axis is kept to be 0 degree, the C axis is sequentially at 0 degree, +180 degrees, +/-90 degrees, and the main axis is respectively at 0 degree and 180 degrees, and coordinates of the same point under different C axis angles are measured;
S5, calculating error values of the C axis and the A axis in the X direction and the Y direction.
The measuring head-based RTCP precision calibration method for the CA type five-axis numerical control machine tool disclosed by the patent document can automatically detect and quickly adjust the RTCP precision of the CA type five-axis numerical control machine tool, and improves the detection efficiency. However, because the detection is completed based on the probe and the auxiliary tool, the dynamic accuracy detection of the main shaft cannot be realized through the rotation of the probe, and the eccentric error of the probe and the deformation error of the probe are introduced into the measurement result, so that the detection accuracy is affected.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the non-contact type numerical control machine tool precision detection device and method, which can finish dynamic precision detection of radial and axial deflection of a main shaft and thermal elongation under the required rotating speed, and a measured body is not contacted with a measured body, so that the measurement contact error is reduced, and the detection precision can be effectively improved.
The invention is realized by the following technical scheme:
The utility model provides a non-contact digit control machine tool precision detection device, includes the detector that cooperatees with the main shaft, its characterized in that: still include electrical control cabinet, wireless signal transmitter and wireless signal receiver, wireless signal transmitter sets up on the detector, wireless signal receiver sets up on electrical control cabinet, the detector includes mounting plate, fixed bolster, goes up C type support, lower C type support and a plurality of sensor, fixed bolster vertical fixation connects on mounting plate, goes up C type support and fixes the upper end at the fixed bolster, and lower C type support is fixed the lower extreme at the fixed bolster, go up C type support and the inboard of lower C type support all are provided with the sensor, the sensor is connected with wireless signal transmitter electricity.
The sensor is an eddy current displacement sensor.
The non-contact type numerical control machine tool precision detection method is characterized by comprising the following steps of:
Step S1: a detection device is arranged on the workbench, and a detection rod is arranged on the main shaft;
step S2: under the condition that the C axis and the A axis are 0 degree, the inspection rod enters the detection device, the inspection rod approaches the sensor, the sensor collects a distance value to perform zero calculation of the angle of the A axis, the zero of the A axis is determined, then the Z axis of the main shaft is moved, and the parallelism of the main shaft and the Z axis in the X direction and the Y direction is detected;
Step S3: under the condition that the C axis and the A axis are 0 degree, the inspection rod enters the detection device, the inspection rod approaches the sensor, the C axis is rotated, the sensor values at 0 degree, 180 degrees, -90 degrees and 90 degrees are recorded in sequence, the offset in the X direction and the Y direction are calculated, the parameters of the numerical control machine tool are adjusted, and the coaxiality error detection and compensation of the main shaft and the C axis are completed;
Step S4: and rotating the main shaft, and measuring radial movement, axial movement and thermal elongation of the main shaft at a preset rotating speed.
The number of sensors is 7, four sensors are distributed on the upper C-shaped support and comprise a sensor P1, a sensor P2, a sensor P3 and a sensor P7, three sensors are distributed on the lower C-shaped support and comprise a sensor P4, a sensor P5 and a sensor P6, six sensors respectively collect a near-end distance value and a far-end distance value of a test rod on a main shaft, and the remaining sensor collects an end face distance value of the test rod.
In the step S2, the coordinates of the X axis are adjusted to make the data of the sensor P1 and the data of the sensor P2 coincide, the Y axis is moved, the inspection bar collects the sensor value P3 'on the sensor P3 and the sensor value P6' on the sensor P6, and the difference δ= |p6'-P3' | in the Y direction is calculated.
In the step S2, the zero position calculation of the angle of the A axis is performed through the method 1;
1 (1)
Wherein L is the interval between the upper C-shaped bracket and the lower C-shaped bracket.
In the step S3, the coaxiality error detection means that coaxiality adjustment is performed when the relative difference of the sensors is greater than 0.04.
In the step S3, when |p6'-P3' | is greater than 0.02, the angle A0 is adjusted, the deviation of the a axis is calculated by performing inverse trigonometric function, and compensation data is output, and the parameter A0 is compensated.
The beneficial effects of the invention are mainly shown in the following aspects:
1. According to the invention, dynamic precision detection of the radial and axial deflection of the main shaft and the thermal elongation under the required rotating speed can be completed, the measured body is not contacted with the measured body, the measurement contact error is reduced, and the detection precision can be effectively improved.
2. The invention can detect and compensate zero position precision of the A, C axis of the numerical control machine tool, detect parallelism of the main axis and the Z axis in the X/Y direction, detect and compensate coaxiality of the main axis, realize detection and adjustment of various precision, and has good applicability.
3. According to the invention, after one-time adjustment and installation are completed, automatic detection is realized subsequently, and the detection efficiency is improved.
4. The invention can reduce errors possibly generated when the parameters of the machine tool are manually adjusted, and ensure the detection precision.
5. The invention solves the problems of automatic detection and compensation of the precision of the existing CA structure five-axis linkage numerical control machine tool, and has the advantages of accuracy, rapidness, adaptation to complex processing environment and automatic compensation.
Drawings
The invention will be further specifically described with reference to the drawings and detailed description below:
FIG. 1 is a schematic diagram of a detector according to the present invention;
FIG. 2 is a schematic diagram of the structure of the electrical control cabinet of the present invention;
The marks in the figure: 1. the detector, 2, the electrical apparatus switch board, 3, wireless signal transmitter, 4, wireless signal receiver, 5, mounting plate, 6, fixed bolster, 7, go up C type support, 8, lower C type support, 9, sensor.
Detailed Description
Example 1
Referring to fig. 1 and 2, a non-contact type numerical control machine tool precision detection device comprises a detector 1 matched with a main shaft, and further comprises an electric control cabinet 2, a wireless signal transmitter 3 and a wireless signal receiver 4, wherein the wireless signal transmitter 3 is arranged on the detector 1, the wireless signal receiver 4 is arranged on the electric control cabinet 2, the detector 1 comprises a mounting base plate 5, a fixing support 6, an upper C-shaped support 7, a lower C-shaped support 8 and a plurality of sensors 9, the fixing support 6 is vertically and fixedly connected on the mounting base plate 5, the upper C-shaped support 7 is fixed at the upper end of the fixing support 6, the lower C-shaped support 8 is fixed at the lower end of the fixing support 6, the inner sides of the upper C-shaped support 7 and the lower C-shaped support 8 are both provided with the sensors 9, and the sensors 9 are electrically connected with the wireless signal transmitter 3.
The sensor 9 is an eddy current displacement sensor 9.
The embodiment is the most basic implementation mode, can accomplish the dynamic accuracy detection of the radial and axial deflection of the main shaft and the thermal elongation under the required rotating speed, and the measuring body is not contacted with the measured body, so that the measuring contact error is reduced, and the detection accuracy can be effectively improved.
Example 2
Referring to fig. 1 and 2, a method for detecting precision of a non-contact type numerical control machine tool includes the following steps:
Step S1: a detection device is arranged on the workbench, and a detection rod is arranged on the main shaft;
Step S2: under the condition that the C axis and the A axis are 0 degree, the inspection rod enters a detection device, the inspection rod approaches to the sensor 9, the sensor 9 collects a distance value to perform zero calculation of the angle of the A axis, the zero of the A axis is determined, then the Z axis of the main shaft is moved, and the parallelism of the main shaft and the Z axis in the X direction and the Y direction is detected;
Step S3: under the condition that the C axis and the A axis are 0 degree, the inspection rod enters the detection device, the inspection rod approaches to the sensor 9, the C axis is rotated, the values of the sensor 9 at 0 degree, 180 degree, 90 degree and 90 degree are recorded in sequence, the offset in the X direction and the Y direction are calculated, the parameters of the numerical control machine tool are adjusted, and the coaxiality error detection and compensation of the main shaft and the C axis are completed;
Step S4: and rotating the main shaft, and measuring radial movement, axial movement and thermal elongation of the main shaft at a preset rotating speed.
The embodiment is a preferred implementation manner, can perform zero position precision detection and compensation of a A, C axis of the numerical control machine tool, and perform precision detection of parallelism between a main shaft and a Z axis in an X/Y direction, and perform spindle coaxiality detection and compensation, so that multiple precision detection and adjustment are realized, and the method has good applicability.
Example 3
Referring to fig. 1 and 2, a method for detecting precision of a non-contact type numerical control machine tool includes the following steps:
Step S1: a detection device is arranged on the workbench, and a detection rod is arranged on the main shaft;
Step S2: under the condition that the C axis and the A axis are 0 degree, the inspection rod enters a detection device, the inspection rod approaches to the sensor 9, the sensor 9 collects a distance value to perform zero calculation of the angle of the A axis, the zero of the A axis is determined, then the Z axis of the main shaft is moved, and the parallelism of the main shaft and the Z axis in the X direction and the Y direction is detected;
Step S3: under the condition that the C axis and the A axis are 0 degree, the inspection rod enters the detection device, the inspection rod approaches to the sensor 9, the C axis is rotated, the values of the sensor 9 at 0 degree, 180 degree, 90 degree and 90 degree are recorded in sequence, the offset in the X direction and the Y direction are calculated, the parameters of the numerical control machine tool are adjusted, and the coaxiality error detection and compensation of the main shaft and the C axis are completed;
Step S4: and rotating the main shaft, and measuring radial movement, axial movement and thermal elongation of the main shaft at a preset rotating speed.
The number of the sensors 9 is 7, four sensors are distributed on the upper C-shaped support 7 and comprise a sensor P1, a sensor P2, a sensor P3 and a sensor P7, three sensors are distributed on the lower C-shaped support 8 and comprise a sensor P4, a sensor P5 and a sensor P6, six sensors 9 respectively collect a near-end distance value and a far-end distance value of a test rod on a main shaft, and the remaining sensor 9 collects an end face distance value of the test rod.
In the step S2, the coordinates of the X axis are adjusted to make the data of the sensor P1 and the data of the sensor P2 coincide, the Y axis is moved, the inspection bar collects the sensor value P3 'on the sensor P3 and the sensor value P6' on the sensor P6, and the difference δ= |p6'-P3' | in the Y direction is calculated.
In this embodiment, after the adjustment and installation are completed once, the automatic detection is realized subsequently, so that the detection efficiency is improved.
Example 4
Referring to fig. 1 and 2, a method for detecting precision of a non-contact type numerical control machine tool includes the following steps:
Step S1: a detection device is arranged on the workbench, and a detection rod is arranged on the main shaft;
Step S2: under the condition that the C axis and the A axis are 0 degree, the inspection rod enters a detection device, the inspection rod approaches to the sensor 9, the sensor 9 collects a distance value to perform zero calculation of the angle of the A axis, the zero of the A axis is determined, then the Z axis of the main shaft is moved, and the parallelism of the main shaft and the Z axis in the X direction and the Y direction is detected;
Step S3: under the condition that the C axis and the A axis are 0 degree, the inspection rod enters the detection device, the inspection rod approaches to the sensor 9, the C axis is rotated, the values of the sensor 9 at 0 degree, 180 degree, 90 degree and 90 degree are recorded in sequence, the offset in the X direction and the Y direction are calculated, the parameters of the numerical control machine tool are adjusted, and the coaxiality error detection and compensation of the main shaft and the C axis are completed;
Step S4: and rotating the main shaft, and measuring radial movement, axial movement and thermal elongation of the main shaft at a preset rotating speed.
The number of the sensors 9 is 7, four sensors are distributed on the upper C-shaped support 7 and comprise a sensor P1, a sensor P2, a sensor P3 and a sensor P7, three sensors are distributed on the lower C-shaped support 8 and comprise a sensor P4, a sensor P5 and a sensor P6, six sensors 9 respectively collect a near-end distance value and a far-end distance value of a test rod on a main shaft, and the remaining sensor 9 collects an end face distance value of the test rod.
In the step S2, the coordinates of the X axis are adjusted to make the data of the sensor P1 and the data of the sensor P2 coincide, the Y axis is moved, the inspection bar collects the sensor value P3 'on the sensor P3 and the sensor value P6' on the sensor P6, and the difference δ= |p6'-P3' | in the Y direction is calculated.
In the step S2, the zero position calculation of the angle of the A axis is performed through the method 1;
1 (1)
Wherein L is the distance between the upper C-shaped bracket 7 and the lower C-shaped bracket 8.
The embodiment is another preferred implementation manner, so that errors possibly generated when parameters of the machine tool are manually adjusted can be reduced, and detection accuracy is guaranteed.
Example 5
Referring to fig. 1 and 2, a method for detecting precision of a non-contact type numerical control machine tool includes the following steps:
Step S1: a detection device is arranged on the workbench, and a detection rod is arranged on the main shaft;
Step S2: under the condition that the C axis and the A axis are 0 degree, the inspection rod enters a detection device, the inspection rod approaches to the sensor 9, the sensor 9 collects a distance value to perform zero calculation of the angle of the A axis, the zero of the A axis is determined, then the Z axis of the main shaft is moved, and the parallelism of the main shaft and the Z axis in the X direction and the Y direction is detected;
Step S3: under the condition that the C axis and the A axis are 0 degree, the inspection rod enters the detection device, the inspection rod approaches to the sensor 9, the C axis is rotated, the values of the sensor 9 at 0 degree, 180 degree, 90 degree and 90 degree are recorded in sequence, the offset in the X direction and the Y direction are calculated, the parameters of the numerical control machine tool are adjusted, and the coaxiality error detection and compensation of the main shaft and the C axis are completed;
Step S4: and rotating the main shaft, and measuring radial movement, axial movement and thermal elongation of the main shaft at a preset rotating speed.
The number of the sensors 9 is 7, four sensors are distributed on the upper C-shaped support 7 and comprise a sensor P1, a sensor P2, a sensor P3 and a sensor P7, three sensors are distributed on the lower C-shaped support 8 and comprise a sensor P4, a sensor P5 and a sensor P6, six sensors 9 respectively collect a near-end distance value and a far-end distance value of a test rod on a main shaft, and the remaining sensor 9 collects an end face distance value of the test rod.
In the step S2, the coordinates of the X axis are adjusted to make the data of the sensor P1 and the data of the sensor P2 coincide, the Y axis is moved, the inspection bar collects the sensor value P3 'on the sensor P3 and the sensor value P6' on the sensor P6, and the difference δ= |p6'-P3' | in the Y direction is calculated.
In the step S2, the zero position calculation of the angle of the A axis is performed through the method 1;
1 (1)
Wherein L is the distance between the upper C-shaped bracket 7 and the lower C-shaped bracket 8.
In the step S3, the coaxiality error detection means that coaxiality adjustment is performed when the relative difference of the sensor 9 is greater than 0.04.
In the step S3, when |p6'-P3' | is greater than 0.02, the angle A0 is adjusted, the deviation of the a axis is calculated by performing inverse trigonometric function, and compensation data is output, and the parameter A0 is compensated.
The embodiment is an optimal implementation mode, solves the difficult problems of automatic detection and compensation of the precision of the existing CA structure five-axis linkage numerical control machine tool, and has the advantages of accuracy, rapidness, adaptation to complex processing environments and automatic compensation.
The judging and compensating process of the invention is as follows:
Compensation A0:
When the main shafts A0 and C0 are positioned in the gaps of the detectors, the collected data of P1=P2 are consistent, the Y axis is moved to 0 under the safety distance, namely, the detection rod approaches to the sensor P3 and the sensor P6, the sensor P3 and the sensor P6 collect the data, after the collected values are stable, the difference value of P3 'and P6' is judged, namely, the difference value of P3 'and P6' is not more than 0.02, the difference value is not adjusted, and the output A0 is intact; when the difference is too large, i.e., |P6'-P3' | > 0.02, the angle A0 is adjusted, the deviation of the axis A is calculated through an inverse trigonometric function, compensation data are output, and the parameter A0 is compensated. The values of P3 'and P6' are collected, and the positive and negative directions of A compensation can be judged. The adjustment process comprises the following steps: the detection bars on the main shafts of the device A0 ℃ and the device C0 ℃ enter the detector from a C-shaped notch of the upper C-shaped bracket, the X-axis coordinate is adjusted to enable data of the sensor P1 and the sensor P2 to be consistent and stable, in the Y-axis moving process, the detection bars respectively collect numerical values P3 'and P6' on the positions of the sensor P3 and the sensor P6, the distance L between the upper C-shaped bracket and the lower C-shaped bracket is more than 300mm, and the difference delta= |P6'-P3' | in the Y direction is calculated.
Axis zero degree angle adjustment:。
Further, the measured values p1_z1 and p3_z1 of the sensor P1 and the sensor P3 at this time are recorded, the spindle moves far to a position close to the P1 along the Z direction, the moving distance is the distance between the upper C-shaped bracket and the lower C-shaped bracket, the measured values p1_z2 and p3_z2 of the sensor P1 and the sensor P3 are obtained, and the calculation result is that: difference between main axis and Z axis parallelism X direction: p1_z1-p1_z2|, difference in the Y direction of parallelism of the main axis and the Z axis: i P3_Z1-P3_Z2.
Similarly, the installation position of the fixed support is changed, the fixed support is parallel to the Y axis, the zero angle of the C axis can be measured when the angle of the A axis is 90 degrees or-90 degrees, and the C0 is compensated in the same way.
Compensating coaxiality:
The main shafts A0 and C0 are positioned at the upper part of the detector, the Y axis is moved to 0 under the safety distance, the near-end sensor P1 and the sensor P2, and the far-end sensor P4 and the sensor P5 can acquire a group of data P1', P2', P4 'and P5'; rotating the C-axis 180, the proximal sensor P1 and the sensor P2, the distal sensor P4 and the sensor P5, and again acquiring a set of data P1'', P2'', P4'', P5''; judging the relative difference value of the corresponding sensors, namely that the absolute value of the absolute value P1'-P1' is less than or equal to 0.04, the absolute value of the absolute value P2'-P2' is less than or equal to 0.04, the absolute value of the absolute value P4'-P4' is less than or equal to 0.04, the absolute value of the absolute value P5'-P5' is less than or equal to 0.04, the difference value meets the set error, and the values of the sensor P3 and the sensor P6 are detected subsequently without adjustment; when the difference is too large, i.e., the difference is more than 0.04, |P1'-P1' '| is more than 0.04, |P2' -P2'' | is more than 0.04, |P4'-P4' '| is more than 0.04, |P5' -P5'' | is more than 0.04, and the coaxiality is adjusted. The adjustment process comprises the following steps: when the equipment A0 DEG and C0 DEG and the inspection rod on the main shaft enter the detector from the C-shaped notch, the initial sensor P1 and the sensor P2 are stable and consistent in data, omega is adopted, and the C shaft is rotated under the condition that the real-time transmission control protocol RTCP is opened: the near-end sensor P1 measures the sensor value P1 'of the C-axis at an angle of 180 DEG, and the sensor P2 measures the sensor value P2' at an angle of-180 DEG; and (3) the same principle: the remote end also obtains a sensor value P4 'and a sensor value P5'. Adjusting an X coordinate axis: the near end εX1= [ (|P1 '- ω|) per 2+ (|P2' - ω|/2) ]/2, and the far end can obtain εX1. The X-axis coordinate adjustment Δx= (εx1+εx2)/2, where the sensors P1, P2, P4, P5 are substantially identical, i.e. where the test rod is in the middle of the detector. And then moving the Y-axis coordinate axis, namely adjusting the numerical values of the sensor P3 and the sensor P6, wherein the sensor P1 and the sensor P2 change along with the change of the sensor P3, and finally adjusting to ensure that the data of the near-end sensors P1, P2 and P3 are consistent, namely completing coaxiality adjustment.
Claims (8)
1. The utility model provides a non-contact digit control machine tool precision detection device, includes detector (1) that cooperatees with the main shaft, its characterized in that: still include electrical control cabinet (2), wireless signal transmitter (3) and wireless signal receiver (4), wireless signal transmitter (3) set up on detector (1), wireless signal receiver (4) set up on electrical control cabinet (2), detector (1) include mounting plate (5), fixed bolster (6), go up C type support (7), lower C type support (8) and a plurality of sensor (9), fixed bolster (6) vertical fixation connects on mounting plate (5), goes up C type support (7) and fixes the upper end at fixed bolster (6), and lower C type support (8) are fixed in the lower extreme of fixed bolster (6), go up C type support (7) and the inboard of C type support (8) down all are provided with sensor (9), sensor (9) are connected with wireless signal transmitter (3) electricity.
2. The non-contact type numerical control machine tool precision detection device according to claim 1, wherein: the sensor (9) is an eddy current displacement sensor (9).
3. The non-contact type numerical control machine tool precision detection method is characterized by comprising the following steps of:
Step S1: a detection device is arranged on the workbench, and a detection rod is arranged on the main shaft;
Step S2: under the condition that the C axis and the A axis are 0 degree, the inspection rod enters a detection device, the inspection rod approaches to a sensor (9), the sensor (9) collects a distance value to perform zero calculation of the angle of the A axis, the zero of the A axis is determined, then the Z direction of the main shaft is moved, and the parallelism of the main shaft and the Z axis in the X direction and the Y direction is detected;
Step S3: under the condition that the C axis and the A axis are 0 degree, the inspection rod enters the detection device, the inspection rod approaches the sensor (9), the C axis is rotated, the sensor values at 0 degree, 180 degree, 90 degree and 90 degree are sequentially recorded, the offset in the X direction and the Y direction are calculated, the parameters of the numerical control machine tool are adjusted, and the coaxiality error detection and compensation of the main shaft and the C axis are completed;
Step S4: and rotating the main shaft, and measuring radial movement, axial movement and thermal elongation of the main shaft at a preset rotating speed.
4. The non-contact numerical control machine tool precision detection method according to claim 3, characterized in that: the number of the sensors (9) is 7, the sensors are distributed on the upper C-shaped support (7) and comprise a sensor P1, a sensor P2, a sensor P3 and a sensor P7, the sensors are distributed on the lower C-shaped support (8) and comprise a sensor P4, a sensor P5 and a sensor P6, the six sensors (9) respectively collect a near-end distance value and a far-end distance value of a test rod on a main shaft, and the rest sensor (9) collects an end face distance value of the test rod.
5. The method for detecting precision of the non-contact numerical control machine tool according to claim 4, wherein the method comprises the following steps: in the step S2, the coordinates of the X axis are adjusted to make the data of the sensor P1 and the data of the sensor P2 coincide, the Y axis is moved, the inspection bar collects the sensor value P3 'on the sensor P3 and the sensor value P6' on the sensor P6, and the difference δ= |p6'-P3' | in the Y direction is calculated.
6. The method for detecting precision of the non-contact numerical control machine tool according to claim 5, wherein the method comprises the following steps: in the step S2, the zero position calculation of the angle of the A axis is performed through the method 1;
1 (1)
Wherein L is the interval between the upper C-shaped bracket (7) and the lower C-shaped bracket (8).
7. The method for detecting precision of the non-contact numerical control machine tool according to claim 5, wherein the method comprises the following steps: in the step S3, the coaxiality error detection means that coaxiality adjustment is performed when the relative difference of the sensors (9) is greater than 0.04.
8. The method for detecting precision of the non-contact numerical control machine tool according to claim 5, wherein the method comprises the following steps: in the step S3, when |p6'-P3' | is greater than 0.02, the angle A0 is adjusted, the deviation of the a axis is calculated by performing inverse trigonometric function, and compensation data is output, and the parameter A0 is compensated.
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