CN113985813A - Machine tool origin error compensation method based on-machine detection - Google Patents

Machine tool origin error compensation method based on-machine detection Download PDF

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Publication number
CN113985813A
CN113985813A CN202111253919.8A CN202111253919A CN113985813A CN 113985813 A CN113985813 A CN 113985813A CN 202111253919 A CN202111253919 A CN 202111253919A CN 113985813 A CN113985813 A CN 113985813A
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machine tool
axis
standard
measurement
standard ball
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CN113985813B (en
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周鑫
张森堂
赵天杨
唐祥武
李玉敏
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AECC Shenyang Liming Aero Engine Co Ltd
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AECC Shenyang Liming Aero Engine Co Ltd
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/404—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/35—Nc in input of data, input till input file format
    • G05B2219/35408—Calculate new position data from actual data to compensate for contour error
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The invention discloses a machine tool origin error compensation method based on-machine detection, which comprises the steps of preparing for measurement, completing standard ball detection, completing standard ball calibration and analysis, judging the measurement precision of a standard ball, completing the measurement of each direction of a standard gauge block, completing the calculation of machine tool origin error, judging the deviation of the machine tool origin, restarting the machine tool after power failure, ensuring that the reset machine tool coordinate takes effect, calibrating and analyzing the standard ball, detecting a five axis of the standard ball and outputting the machine tool origin; the method of the invention is used for carrying out machine tool origin alignment and compensation on old equipment and equipment damaged by the grating ruler in the aviation manufacturing industry, so that the machining precision of the numerical control machine tool is improved, and further, the problems that the machine tool cannot be reset, the origin of the old equipment drifts, the quality of parts is reduced due to the origin drifts and the like caused by the damage of the equipment grating ruler are solved, meanwhile, the equipment with improved precision can be put into production again, and the production capacity is improved.

Description

Machine tool origin error compensation method based on-machine detection
Technical Field
The invention relates to the technical field of aerospace numerical control machining, in particular to a machine tool origin error compensation method based on-machine detection.
Background
With the rapid development of the aviation manufacturing industry, the aviation parts such as the casing, the blisk and the blade have more complex structures and higher requirements on the machining precision. In the face of increasingly intense market competition pressure, how to improve the machining precision of the machine tool, ensure the machining quality of parts, reduce related production cost and increase economic benefits is a development target of enterprises. Most of aviation parts are difficult-to-cut materials such as high-temperature alloy, powdered high-temperature alloy and titanium alloy, once a cutting accident occurs to numerical control equipment, or after continuous production for many years, the phenomenon that precision slides down inevitably occurs, and the processing quality of parts is affected. When the machining precision of the parts can not be ensured, the production task can be ensured only by newly adding imported equipment, the production cost is high, and the benefit is low.
The prior machine tool has poor intelligent function, can only improve the quality of a machined part by depending on the over-hard technical level of an operator, and cannot effectively control the error influence factors such as product error, thermal deformation, cutter abrasion, clamp deformation and the like. The problem is solved by effectively combining the numerical control technology and the numerical control measurement technology, for example, equipment such as a precision compensation positive element measuring head, a position sensor, a grating ruler and the like is installed on a numerical control machine tool, so that the machining error of the machine tool can be fed back to a numerical control system in real time, the numerical control machine tool automatically performs machining precision compensation, the machining precision of parts is improved, and the cost of raw materials is saved. At present, precision of a batch of equipment slips down due to the problems that an equipment grating device is damaged and cannot automatically return to zero and the like in a manufacturing enterprise, and only the positioning precision and repeated positioning precision of a machine tool can be restored by applying machine tool fault diagnosis equipment such as a laser displacement sensor and the like, and origin alignment and compensation cannot be realized. Up to now, there is no technical method for compensating the origin of the machine tool based on-machine measurement technology.
Disclosure of Invention
In order to solve the technical problems, a machine tool origin error compensation method based on-machine detection is provided, and the specific technical scheme is as follows:
a machine tool origin error compensation method based on-machine detection comprises the following steps:
step 1, preparing measurement, namely preparing 1 spindle core rod, 1 cubic block, 1 standard gauge block, 1 measuring head for on-machine measurement, 1 probe and 1 standard ball;
the cubic block and the standard ball are arranged on a rotary table of the machine tool, and the probe and the measuring head are arranged in a tool magazine of the machine tool in a matching manner;
step 2, completing standard ball detection, namely compiling a 3-axis measuring program of covering a hemispherical surface by 25 points aiming at a D25 standard ball, calling a measuring head and a probe from a tool magazine of a machine tool, and completing on-machine measurement of the standard ball under the reference of the machine tool;
step 3, completing calibration and analysis of the standard ball, namely comparing the measured data of the standard ball with theoretical data of the standard ball, and calculating the eccentricity value of the measured data of the standard ball;
step 4, judging the measurement accuracy of the standard ball; measurement error e of standard ball1>0.01, compensating the calculated eccentricity value into a standard ball measuring reference of the machine tool, and executing the step 2, otherwise, executing the step 5;
step 5, completing the all-directional measurement of the standard gauge block, and calculating the machine tool coordinates of the cubic block in each direction;
step 6, completing the calculation of the error of the origin of the machine tool;
first, the side X of the machine table is measured0Measuring the same position X after the machine tool workbench rotates 180 degrees180Calculating the X-direction error e of the machine tool according to the basic data prepared by the machine tool measurement and the coordinates of each direction of the cubic blockxError in Y direction eyZ-direction error ezDistance l from axis A to axis BA_BDistance Dis from the table to the A-axisA_Stage；
Calculating the distance from the worktable to the A axis according to the coordinate values
DisA_Stage＝(CubicY0-CubicY90-2*Hcubic-CubicZ0+CubicZ90)/2
Distance from A-axis to B-axis
lA_B＝ey-(CubicY90+CubicY90_180)/2
X-direction error of machine tool
ex＝-(X0+X180)/2
Y-direction error of machine tool
ey＝CubicY0-DisA_Stage-Hcubic
Z-direction error of machine tool
ez＝CubicZ0-DisCubic_B(ii) a Therein, DisCubic_BDistance from the front of the cube to the center of the B-axis, DisCubic_B＝ey-CubicY90；
Step 7, judging the deviation of the origin of the machine tool;
when calculated ex，ey，ezWhen the speed exceeds 0.03, the machine tool is moved to x0`、y0`、z0Resetting and executing the step 5;
when calculated ex，ey，ezWhen the value is less than or equal to 0.03, executing the step 8; wherein x0、y0、z0Is the distance, x, from the original coordinate point of the machine tool to the grating0`＝x0+ex、y0`＝y0+ey、z0`＝z0+ez；
Step 8, the machine tool is powered off and restarted, and the reset machine tool coordinate is ensured to be effective;
step 9, calibrating and analyzing the standard ball, and converging the triaxial measurement precision of the standard ball to 0.01 mm;
step 10, five-axis detection of the standard ball, analysis of the measurement precision, and when e3>When the diameter is 0.03mm, executing the step 5, otherwise, executing the step 11;
and step 11, outputting the origin of the machine tool.
The preferable scheme of the machine tool origin error compensation method based on-machine detection is that in step 1, the length of a main shaft core rod in measurement preparation is LplugDiameter ofDplugThe core rod of (1);
the cube in preparation for measurement, referred to as height HcubicThe cubic block of (1);
the standard gauge block in the measurement preparation has a height hgaugeStandard gauge block of (2).
In the preferable scheme of the method for compensating the error of the origin of the machine tool based on-machine detection, in step 5, the standard gauge blocks are detected in all directions, namely, standard core rods are called out from a tool magazine of the machine tool, and the measurement in 5 directions is completed: namely, measuring the Z-direction coordinate of the standard gauge block at 0 degree of the A axis and 0 degree of the B axis, and recording the Z-axis coordinate Z of the machine tool0(ii) a Measuring Y-direction coordinates of the standard gauge block at 0 degree of the A axis and 0 degree of the B axis, and recording Y-axis coordinates Y of the machine tool0(ii) a Measuring Z-direction coordinates of the standard gauge block at an A-axis angle of 90 degrees and a B-axis angle of 0 degrees, and recording Z-axis coordinates Z of the machine tool90(ii) a Measuring Y-direction coordinates of the standard gauge block at an A-axis angle of-90 degrees and a B-axis angle of 0 degrees, and recording Y-axis coordinates Y of the machine tool90(ii) a Measuring Y-direction coordinates of the standard gauge block when the A axis is at-90 degrees and the B axis is at 180 degrees, and recording Y-axis coordinates Y of the machine tool90_180。
The preferable scheme of the machine tool origin error compensation method based on-machine detection is that in step 5, the coordinates of the cube in each direction are calculated, namely the cube coordinate CubicZ in the directions of 0 degree of an A axis, 0 degree of a B axis and Z axis0＝Z0-Lplug-hgauge(ii) a Cube coordinates CubicY with 0 degree of A axis, 0 degree of B axis and Y direction0＝Y0-Dplug/2-hgauge(ii) a Cube coordinate CubicZ of-90 degree on A axis, 0 degree on B axis and Z direction90＝Z90-Lplug-hgauge(ii) a Cube coordinates CubicY with-90 degrees on the A axis, 0 degrees on the B axis and Y direction90＝Y90+Dplug/2+hgauge(ii) a Cube coordinate CubicY of-90 degree on A axis, 180 degree on B axis and Y direction90_180＝Y90_180-Dplug/2-hgauge。
The invention has the beneficial effects that:
the invention provides a machine tool origin error compensation method based on machine tool on-machine detection data for the first time, successfully applies the related technology to origin error compensation of a plurality of five-axis numerical control machining centers of a company, and applies numerical control equipment after error compensation to complete numerical control machining of various aviation parts such as a casing, a blade, a blisk and the like, thereby filling the technical blank of compensating the machine tool origin based on-machine measurement.
The processing test shows that: the equipment measurement and machining precision is improved to 0.02mm from original 0.05mm, the machine tool only occupies 10min, and the machining precision is obviously improved. The method is realized, so that the problems that a machine tool cannot return to zero due to damage of the equipment grating ruler, the original point of old equipment drifts, the quality of parts is reduced due to the original point drifts and the like are solved, meanwhile, the equipment with improved precision can be put into production again, and the production capacity is improved.
The realization of the method not only solves the problems that the machine tool cannot return to zero due to the damage of the equipment grating ruler, the original point of old equipment drifts, the quality of parts is reduced due to the original point drifts and the like, but also the equipment with improved precision can be put into production again, the production capacity is improved, and the method has stronger universality and practicability; the technology can be applied to original point measurement and error compensation of various numerical control devices, machining precision and machining capacity of numerical control devices in the aircraft engine manufacturing industry are obviously improved, the technology has strong universality and practicability, and huge economic benefits are created while core innovation capacity and research and development efficiency of enterprises are improved.
Drawings
FIG. 1 is a flow chart of a machine tool origin error compensation method based on-machine detection according to the present invention;
FIG. 2 is a schematic view of a preparation tool according to the present invention;
wherein: (a) as gauge block, hgaugeIs the standard gauge block height; (b) is a cubic block, HcubicIs the cube height; (c) the standard ball is used for accurately measuring the precision on the machine; (d) is a standard core rod, LplugIs the length of the mandrel, DplugIs the diameter of the core rod; (e) a measuring head and a probe;
FIG. 3 is a schematic view of a standard sphere measurement;
(a) planning point location and path for standard ball measurement, (b) standard ball measurement numerical control program, and (c) on-machine measurement result of the standard ball;
FIG. 4 is a standard sphere measurement accuracy analysis;
(a) the first measurement precision analysis result of the standard ball, (b) the first compensated measurement precision analysis result of the standard ball, and (c) the final compensated precision analysis result of the standard ball;
FIG. 5 is a schematic diagram of measuring the coordinates of the gauge block in each direction;
(a) is a Z-direction coordinate Z of a standard gauge block with 0 degrees of an A axis and 0 degrees of a B axis0；
(b) Is a standard gauge block Y-direction coordinate Y with 0 degree of A axis and 0 degree of B axis0；
(c) Is a Z-direction coordinate Z of a standard gauge block with the A axis of-90 degrees and the B axis of 0 degrees90；
(d) Is a standard gauge block Y-direction coordinate Y with the A axis of-90 degrees and the B axis of 0 degrees90；
(e) Is a standard gauge block Y-direction coordinate Y with an A axis of 90 degrees and a B axis of 180 degrees90_180。
Detailed Description
The invention adopts a technical means of calculating the error of the origin of the machine tool based on the on-machine measurement result, and further compensates the machining error of the machine tool caused by the deviation of the origin by iteratively converging the precision of the origin of the machine tool, and the related technology is successfully applied to the calculation and compensation of the error of the origin of a plurality of five-axis numerical control machining centers of a company; the patent takes a plurality of models of machine tools of a company as an example, and the invention is further explained by combining the attached drawings 1-5 and the implementation process.
1) Preparation for measurement
As shown in fig. 2, 1 spindle core rod, 1 cube, 1 standard gauge block, 1 RMP60 on-machine measuring probe, 1 200mm long probe, and 1 standard ball with 25mm diameter are prepared; wherein, the cubic block and the standard ball are arranged on a rotary table of the machine tool, and the probe and the measuring head are arranged in a tool magazine of the machine tool in a matching way;
wherein, the length L of the main shaft core rodplug299.875mm, diameter Dplug50.006 mm; cube height Hcubic180.0018 mm; height h of standard gauge blockgauge＝50mm；
2) Complete the detection of the standard ball
Aiming at a D25 standard ball, a 3-axis measuring program with 25 points covering a hemispherical surface is compiled, a measuring head and a probe are called out from a machine tool library, and on-machine measurement of the standard ball is completed under the machine tool reference; FIG. 3(a) is a standard sphere measurement point location plan, FIG. 2(b) is an original measurement procedure, and FIG. 2(c) is a measurement result;
3) complete calibration and analysis of standard ball
As shown in fig. 4, the measured standard ball data is compared with the theoretical standard ball data, and the eccentricity value of the standard ball measured data is calculated, as shown in fig. 4 (a); wherein, the X-direction eccentricity is minus 0.0003mm, the Y-direction eccentricity is minus 0.0034mm, and the Z-direction eccentricity is 0.2685 mm;
4) standard ball measurement accuracy judgment
The measuring error of the standard ball exceeds 0.01, the calculated eccentricity value is compensated into the measuring standard of the standard ball of the machine tool, and the measurement is carried out again as shown in figure 4; in FIG. 4(b), the X-direction eccentricity is 0.1345mm, the Y-direction eccentricity is-0.0023 mm, and the Z-direction eccentricity is 0.0188 mm; in FIG. 4(c), the X-direction eccentricity is-0.0014 mm, the Y-direction eccentricity is-0.0036 mm, and the Z-direction eccentricity is 0.0015mm, so that the measurement precision reaches 0.01mm, and the current measurement precision meets the on-machine measurement requirement;
5) finish the all-directional measurement of the standard gauge block
And (3) calling out a standard core rod from a tool magazine of the machine tool to finish the measurement of the standard gauge block in five directions:
measuring the Z-direction coordinate Z of the standard gauge block at 0 degree of the A axis and 0 degree of the B axis0380.4969 mm; measuring Y-direction coordinate Y of the standard gauge block at 0 degree of A axis and 0 degree of B axis0204.7397 mm; measuring Z-direction coordinate Z of the standard gauge block at an A axis of-90 degrees and a B axis of 0 degree90479.773 mm; measuring Y-direction coordinate Y of the standard gauge block at an A-90 degree axis and a B-0 degree axis90-105.7643 mm; when the A axis is at-90 degrees and the B axis is at 180 degrees, the Y-direction coordinate Y of the standard gauge block is measured90_180＝105.438mm；
And (5) calculating the coordinates of the cube in all directions according to the process of the step 5:
CubicZ0＝Z0-Lplug-hgauge＝30.6219mm
CubicY0＝Y0-Dplug/2-hgauge＝129.7367mm
CubicZ90＝Z90-Lplug-hgauge＝129.898mm
CubicY90＝Y90+Dplug/2+hgauge＝-30.7613mm
CubicY90_180＝Y90_180-Dplug/2-hgauge＝30.435mm
6) calculating the error of the origin of the machine tool
Measuring side X of machine tool table0-105.5795mm, measuring the same position X after the machine tool table rotates 180 degrees180＝105.6492mm；
Calculation procedure for calculating the X-direction error e of a machine tool according to step 6 of the claimsxError in Y direction eyZ-direction error ezDistance l from axis A to axis BA_BDistance Dis from the table to the A-axisA_Stage；
And calculating the distance from the workbench to the A axis according to the coordinate values:
DisA_Stage＝(CubicY0-CubicY90-2*Hcubic-CubicZ0+CubicZ90)/2＝-50.1148mm
distance from axis a to axis B:
lA_B＝ey-(CubicY90+CubicY90_180)/2＝0.0128mm
machine tool X-direction error:
ex＝-(X0+X180)/2＝0.03485mm
machine tool Y-direction error:
ey＝CubicY0-DisA_Stage-Hcubic＝-0.15035mm
machine tool Z-direction error:
ez＝CubicZ0-DisCubic_B＝0.01095mm
wherein the distance from the cube front face to the B-axis center:
DisCubic_B＝ey-CubicY90＝30.61095mm
7) machine tool origin offset determination
Calculated ex，ey，ezOver 0.03, x is calculated according to step 70`、y0`、z0And (5) allowing the strain to stand. Firstly, recording the distance x from the original point of the machine tool to the grating ruler0、y0、z0Is (434.875, 257.675, 438.487):
x0`＝x0+ex＝434.875+0.03485＝434.90985mm
y0`＝y0+ey＝257.675+(-0.15035)＝257.52465mm
z0`＝z0+ez＝438.487+0.01095＝438.49795mm
moving the machine tool to (x)0`、y0`、z0') to be rewritten to (x)0、y0、z0) Set to (434.875, 257.675, 438.487), recalculate the origin and compensate the error according to steps 5, 6, 7 described in the claims; the offset phenomenon of the origin of the machine tool after compensation is obviously improved, and the error can be controlled within 0.03 mm; subsequently, the origin calculation and compensation are performed again on other machine tools of the same model, and the statistics are shown in table 1 below.
TABLE 1
Figure BDA0003323381010000101
8) Machine tool power-off restart
Powering off the machine tool and restarting the machine tool to ensure that compensation is effective;
9) calibration and analysis of standard ball
After calibration, the triaxial measurement precision of the standard ball is converged to 0.01 mm;
10) five-axis detection of standard ball
Five-axis detection is carried out on the standard ball, the maximum error is 0.026mm, and the requirement of machining precision is met;
11) output machine tool origin
And outputting the original point of the machine tool to finish the offset compensation of the original point of the machine tool.

Claims (4)

1. A machine tool origin error compensation method based on-machine detection is characterized in that: the method comprises the following steps:
step 1, preparing measurement, namely preparing 1 spindle core rod, 1 cubic block, 1 standard gauge block, 1 measuring head for on-machine measurement, 1 probe and 1 standard ball;
the cubic block and the standard ball are arranged on a rotary table of the machine tool, and the probe and the measuring head are arranged in a tool magazine of the machine tool in a matching manner;
step 2, completing standard ball detection, namely compiling a 3-axis measuring program of covering a hemispherical surface by 25 points aiming at a D25 standard ball, calling a measuring head and a probe from a tool magazine of a machine tool, and completing on-machine measurement of the standard ball under the reference of the machine tool;
step 3, completing calibration and analysis of the standard ball, namely comparing the measured data of the standard ball with theoretical data of the standard ball, and calculating the eccentricity value of the measured data of the standard ball;
step 4, judging the measurement accuracy of the standard ball; measurement error e of standard ball1>0.01, compensating the calculated eccentricity value into a standard ball measuring reference of the machine tool, and executing the step 2, otherwise, executing the step 5;
step 5, completing the all-directional measurement of the standard gauge block, and calculating the machine tool coordinates of the cubic block in each direction;
step 6, completing the calculation of the error of the origin of the machine tool;
first, the side X of the machine table is measured0Measuring the same position X after the machine tool workbench rotates 180 degrees180Calculating the X-direction error e of the machine tool according to the basic data prepared by the machine tool measurement and the coordinates of each direction of the cubic blockxError in Y direction eyZ-direction error ezDistance l from axis A to axis BA_BDistance Dis from the table to the A-axisA_Stage；
Calculating the distance from the worktable to the A axis according to the coordinate values
DisA_Stage＝(CubicY0-CubicY90-2*Hcubic-CubicZ0+CubicZ90)/2
Distance from A-axis to B-axis
lA_B＝ey-(CubicY90+CubicY90_180)/2
X-direction error of machine tool
ex＝-(X0+X180)/2
Y-direction error of machine tool
ey＝CubicY0-DisA_Stage-Hcubic
Z-direction error of machine tool
ez＝CubicZ0-DisCubic_B(ii) a Therein, DisCubic_BDistance from the front of the cube to the center of the B-axis, DisCubic_B＝ey-CubicY90；
Step 7, judging the deviation of the origin of the machine tool;
when calculated ex，ey，ezWhen the speed exceeds 0.03, the machine tool is moved to x0`、y0`、z0Resetting and executing the step 5;
when calculated ex，ey，ezWhen the value is less than or equal to 0.03, executing the step 8; wherein x0、y0、z0Is the distance, x, from the original coordinate point of the machine tool to the grating0`＝x0+ex、y0`＝y0+ey、z0`＝z0+ez；
Step 8, the machine tool is powered off and restarted, and the reset machine tool coordinate is ensured to be effective;
step 9, calibrating and analyzing the standard ball, and converging the triaxial measurement precision of the standard ball to 0.01 mm;
step 10, five-axis detection of the standard ball, analysis of the measurement precision, and when e3>When the diameter is 0.03mm, executing the step 5, otherwise, executing the step 11;
and step 11, outputting the origin of the machine tool.
2. The machine tool origin error compensation method based on-machine detection is characterized in that: in step 1, the length of the spindle core rod in the measurement preparation is LplugDiameter DplugThe core rod of (1);
the cube in preparation for measurement, referred to as height HcubicThe cubic block of (1);
the standard gauge block in the measurement preparation has a height hgaugeStandard gauge block of (2).
3. The machine tool origin error compensation method based on-machine detection is characterized in that: in step 5, the standard gauge block is detected in all directions, namely, a standard core rod is called out from a machine tool magazine to finish the measurement in 5 directions: namely, measuring the Z-direction coordinate of the standard gauge block at 0 degree of the A axis and 0 degree of the B axis, and recording the Z-axis coordinate Z of the machine tool0(ii) a Measuring Y-direction coordinates of the standard gauge block at 0 degree of the A axis and 0 degree of the B axis, and recording Y-axis coordinates Y of the machine tool0(ii) a Measuring Z-direction coordinates of the standard gauge block at an A-axis angle of 90 degrees and a B-axis angle of 0 degrees, and recording Z-axis coordinates Z of the machine tool90(ii) a Measuring Y-direction coordinates of the standard gauge block at an A-axis angle of-90 degrees and a B-axis angle of 0 degrees, and recording Y-axis coordinates Y of the machine tool90(ii) a Measuring Y-direction coordinates of the standard gauge block when the A axis is at-90 degrees and the B axis is at 180 degrees, and recording Y-axis coordinates Y of the machine tool90_180。
4. The machine tool origin error compensation method based on-machine detection is characterized in that: in step 5, the coordinates of the cube in all directions are calculated, namely the cube coordinate CubicZ in the A axis 0 degree, the B axis 0 degree and the Z direction0＝Z0-Lplug-hgauge(ii) a Cube coordinates CubicY with 0 degree of A axis, 0 degree of B axis and Y direction0＝Y0-Dplug/2-hgauge(ii) a Cube coordinate CubicZ of-90 degree on A axis, 0 degree on B axis and Z direction90＝Z90-Lplug-hgauge(ii) a Cube coordinates CubicY with-90 degrees on the A axis, 0 degrees on the B axis and Y direction90＝Y90+Dplug/2+hgauge(ii) a Cube coordinate CubicY of-90 degree on A axis, 180 degree on B axis and Y direction90_180＝Y90_180-Dplug/2-hgauge。
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