CN113369997A - Numerical control machine tool swing angle precision checking method - Google Patents
Numerical control machine tool swing angle precision checking method Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
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- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
Abstract
The invention discloses a method for checking the swing angle precision of a numerical control machine tool, which belongs to the technical field of numerical control machining and is characterized by comprising the following steps of: a. mounting; b. adjusting, namely adjusting the swing angle precision check block to enable the reference plane M3 to be parallel to the X axis of the machine tool coordinate system and enable the top plane M5 to be parallel to the XY plane of the machine tool coordinate system; c. fixing; d. aligning, finding out a Z coordinate value of the top plane M5 in a machine tool coordinate system, and establishing the coordinate system; e. vertical and horizontal conversion; f. secondary alignment; g. comparing the coordinate measured values of the reference hole K2 and the reference surface M2 with theoretical values; h. and (e) compensating the deviation values delta X, delta Y and delta Z into a corresponding machining coordinate system, and executing the step f for rechecking. The invention is suitable for detecting and compensating the positioning error of the five-coordinate numerical control milling machine main shaft after vertical-horizontal conversion or multi-main shaft replacement, can compensate in real time and meets the precision requirement of multi-surface processing of complex workpieces.
Description
Technical Field
The invention relates to the technical field of numerical control machining, in particular to a method for checking the swing angle precision of a numerical control machine tool.
Background
With the development of airplane design technology, the requirements on the structural complexity and the manufacturing precision of airplane parts are higher and higher; the parts are often provided with complex structures such as holes, grooves, ribs and lugs, and a numerical control milling machine is needed for multi-surface precise manufacturing. In order to ensure the size and position precision of the parts, the parts are manufactured by adopting a scheme of one-time clamping and multi-surface processing in a large quantity. The AC swing angle numerical control machine tool is provided with a rotation shaft C along the center of the main shaft and a swing angle shaft A for carrying out fan-shaped swing angles along the rotation center of the main shaft, so that the processing of any vector in each shaft stroke range can be realized, including vertical-horizontal conversion processing, and the requirements of part processing schemes are met.
Theoretically, the accuracy of the AC numerical control machine tool in the stroke range of the AC numerical control machine tool meets the manufacturing requirement. However, most machine tools are affected by the manufacturing accuracy of the machine tool, environmental factors and wear and tear in use, so that the actual position of the machine tool has a large error compared with the theoretical position when the machine tool is switched between a standing position and a lying position. If the machining is performed according to the theoretical value, the requirement of the manufacturing precision of the part is often not met. Therefore, it is necessary to verify and compensate the positional accuracy of the machine tool at the time of vertical-horizontal conversion.
At present, for error checking of AC swing angle vertical and horizontal conversion, a common method is that a machine maintenance worker detects and compensates the precision of a machine tool by adopting a high-precision ball head device. However, this method has many drawbacks, such as: the detection and compensation method is complex, the parameters of the machine tool system need to be changed, and the implementation difficulty is high; due to the problems of machine tool precision and abrasion, complete error compensation is difficult to realize, and in most cases, a compromise mode can only be adopted to achieve the balance of precision errors in all directions, so that the processing requirement of high-precision parts cannot be met; the timeliness is poor, and the method can be carried out only by adopting a fixed time interval; because the compensation interval time is long, and the machine tool precision change is dynamic, real-time compensation cannot be realized, and the actual processing requirement is difficult to meet.
Chinese patent publication No. CN 106950918A, published as 2017, 07, 14 discloses a method for AC swing angle error compensation on a numerical control machine tool, which is characterized in that: the method comprises the following steps:
the method comprises the following steps: installing a check block on a numerical control machine tool, wherein the coordinate system of the numerical control machine tool is X, Y, Z;
step two: processing 3 reference planes on a check block on a numerical control machine tool, wherein the 3 reference planes are an X-plane, a Y-plane and a Z-plane respectively;
step three: the method comprises the following steps of measuring errors of a machine tool swing angle on an X-plane, a Y-plane and a Z-plane of a check block on a numerical control machine tool by a probe respectively:
(1) measurement of X coordinate system error of machine tool swing angle
The swing angle of the machine tool is as follows: the reference value of the X coordinate of the A0 degrees, the C0 degrees and the X-plane is X0;
the swing angle of the machine tool is as follows: the reference value of the X coordinate of the a-90 °, C0 °, X-plane is X1, and the error value of the X coordinate is Δ X1= X1-X0;
the swing angle of the machine tool is as follows: the reference value of the X coordinate of the A90 DEG, the C-90 DEG and the X-plane is X2, and the error value of the X coordinate is delta X2= X2-X0;
the swing angle of the machine tool: the reference value of the X coordinate of the a90 °, C0 °, X-plane is X3, and the error value of the X coordinate is Δ X3= X3-X0;
(2) measurement of Y coordinate system error of machine tool swing angle
The swing angle of the machine tool is as follows: the reference value of the Y coordinates of A0 degrees, C0 degrees and a Y plane is Y0;
the swing angle of the machine tool is as follows: the reference value of the Y coordinate of the A90 DEG, the C-90 DEG and the Y-plane is Y1, and the error value of the Y coordinate is delta Y1= Y1-Y0;
the swing angle of the machine tool is as follows: the reference value of the Y coordinate of the a90 °, C0 °, Y-plane is Y2, and the error value of the Y coordinate is Δ Y2= Y2-Y0;
the swing angle of the machine tool is as follows: the reference value of the Y coordinate of the a90 °, C90 °, Y-plane is Y3, and the error value of the Y coordinate is Δ Y3= Y3-Y0;
(3) measurement of Z coordinate system error of machine tool swing angle
The swing angle of the machine tool is as follows: the reference value of Z coordinates of A0 degrees, C0 degrees and a Z plane is Z0;
the swing angle of the machine tool is as follows: the reference value of the Z coordinate of the A90 DEG and the C0 DEG is Z1, and the error value of the Z coordinate is delta Z1= Z1-Z0;
the swing angle of the machine tool is as follows: a-90 DEG and C0, wherein the reference value of a Z coordinate of a Z plane is Z2, and the error value of the Z coordinate is delta Z2= Z2-Z0;
step four: and (5) compensating the X, Y, Z coordinate error when the machine tool runs according to the error value obtained in the third step.
According to the method for compensating the AC swing angle error on the numerical control machine tool, the error of measuring and compensating the check block is the comprehensive error of the machine tool in the current machining state, the AC swing angle error of the machine tool can be compensated better, the product position accuracy is guaranteed, the operation is simple, the universality is strong, the calculation by other tool software is not needed, the efficiency is high, and the product position accuracy is high. However, the method is not suitable for detecting and compensating the positioning error after the vertical-horizontal conversion of the pivot angle of the main shaft of the five-coordinate numerical control milling machine or the replacement of multiple main shafts, and cannot meet the precision requirement of multi-surface processing of complex workpieces.
Disclosure of Invention
The invention provides a method for verifying the swing angle precision of a numerical control machine tool, which aims to overcome the defects of the prior art, is suitable for detecting and compensating the positioning error of a five-coordinate numerical control milling machine spindle after vertical-horizontal conversion or multi-spindle replacement, can compensate in real time, and meets the precision requirement of multi-surface machining of complex workpieces.
The invention is realized by the following technical scheme:
a method for verifying the swing angle precision of a numerical control machine tool is characterized by comprising the following steps:
a. mounting, namely mounting the swing angle precision check block on a machine tool workbench;
b. adjusting, namely adjusting the swing angle precision check block to enable the reference plane M3 to be parallel to the X axis of the machine tool coordinate system and enable the top plane M5 to be parallel to the XY plane of the machine tool coordinate system;
c. fixing, namely applying pressure to the pressure plate after the adjustment is finished, and fixing the swing angle precision check block on a machine tool workbench;
d. aligning, namely finding out an X coordinate value and a Y coordinate value of the hole center of the reference hole K1 in a machine tool coordinate system by using a dial indicator or a probe, finding out a Z coordinate value of the top plane M5 in the machine tool coordinate system, and establishing a coordinate system;
e. vertical-horizontal conversion, namely operating the machine tool spindle to A90 degrees, and enabling the machine tool spindle to point to the positive direction of the X axis, so that the axis of the machine tool spindle is parallel to the axis of the reference hole K2;
f. secondary alignment, namely aligning the Y coordinate value and the Z coordinate value of the hole center of the datum hole K2 in a coordinate system, and aligning the X coordinate value of the datum plane M2 in a machining coordinate system;
g. comparing the coordinate measured values of the reference hole K2 and the reference surface M2 with theoretical values to obtain deviation values delta X, delta Y and delta Z, which are machine tool precision error values of the machine tool in the horizontal state;
h. and f, after checking the precision errors of the swing angles in the corresponding directions of the machine tool, compensating the deviation values delta X, delta Y and delta Z into the corresponding processing coordinate system, and performing rechecking until the deviation values delta X, delta Y and delta Z of all the axes are zero or less than the requirements of the parts on the errors in the manufacturing process.
In the step a, the swing angle precision check block is of a cuboid structure and comprises a pressing ring groove C1 positioned at the lower part, a bottom plane M6, a reference plane M1 positioned at the upper part, a reference plane M3, a reference plane M2 and a reference plane M4, wherein the reference plane M1 is parallel to the reference plane M3, the reference plane M2 is parallel to the reference plane M4, the reference plane M1 is perpendicular to the reference plane M2, and the reference plane M1, the reference surface M3, the reference surface M2 and the reference surface M4 are perpendicular to the top plane M5 respectively, a round hole K1, a round hole K2 and a round hole K3 are formed in the swing angle precision check block, the round hole K1 is perpendicular to the top plane M5, a round hole K2 is perpendicular to the reference surface M2 and the reference surface M4 respectively, the round hole K3 is perpendicular to the reference surface M1 and the reference surface M3 respectively, the round hole K1, the round hole K2 and the round hole K3 are perpendicular to each other in different planes, the hole axes of the round holes K1, the round hole K2 and the round hole K3 intersect at one point, the bottom plane M6 is parallel to the top plane M5, and a chamfer D1 is arranged at the intersection side of the reference surface M2 and the reference surface M3.
In the step h, the step of checking the precision error of the corresponding direction swing angle of the machine tool specifically means that the main shaft of the machine tool points to the negative direction of the X axis, the positive direction of the Y axis and the negative direction of the Y axis respectively under the horizontal state of A90 degrees, and the step f and the step g are repeated, so that the error value of each direction under the corresponding swing angle state is obtained.
In the step a, a press plate and a plurality of pressing grooves are arranged on a machine tool workbench, the pressing grooves are parallel to each other, and the swing angle precision check block is installed on the pressing grooves through the press plate.
The beneficial effects of the invention are mainly shown in the following aspects:
1. the method comprises the following steps of (a) mounting, namely mounting a swing angle precision check block on a machine tool workbench; b. adjusting, namely adjusting the swing angle precision check block to enable the reference plane M3 to be parallel to the X axis of the machine tool coordinate system and enable the top plane M5 to be parallel to the XY plane of the machine tool coordinate system; c. fixing, namely applying pressure to the pressure plate after the adjustment is finished, and fixing the swing angle precision check block on a machine tool workbench; d. aligning, namely finding out an X coordinate value and a Y coordinate value of the hole center of the reference hole K1 in a machine tool coordinate system by using a dial indicator or a probe, finding out a Z coordinate value of the top plane M5 in the machine tool coordinate system, and establishing a coordinate system; e. vertical-horizontal conversion, namely operating the machine tool spindle to A90 degrees, and enabling the machine tool spindle to point to the positive direction of the X axis, so that the axis of the machine tool spindle is parallel to the axis of the reference hole K2; f. secondary alignment, namely aligning the Y coordinate value and the Z coordinate value of the hole center of the datum hole K2 in a coordinate system, and aligning the X coordinate value of the datum plane M2 in a machining coordinate system; g. comparing the coordinate measured values of the reference hole K2 and the reference surface M2 with theoretical values to obtain deviation values delta X, delta Y and delta Z, which are machine tool precision error values of the machine tool in the horizontal state; h. after the precision errors of the pivot angles in the corresponding directions of the machine tool are checked, the deviation values delta X, delta Y and delta Z are compensated into the corresponding processing coordinate system, and the step f is executed for rechecking until the deviation values delta X, delta Y and delta Z of all the axes are zero or less than the requirements of parts on the errors in manufacturing.
2. According to the invention, the swing angle precision check block is of a cuboid structure and comprises a pressing annular groove C1, a bottom plane M6, a reference plane M1, a reference plane M3, a reference plane M2 and a reference plane M4 which are positioned at the lower part, a reference plane M1 and a reference plane M3 which are positioned at the upper part are parallel, a reference plane M2 and a reference plane M4 which are positioned at the upper part are parallel, a reference plane M1 and a reference plane M2 which are positioned at the upper part are perpendicular, a reference plane M1, a reference plane M3, a reference plane M2 and a reference plane M4 which are positioned at the upper part are respectively perpendicular to a top plane M5, round holes K1, a round hole K2 and a round hole K3 are formed in the swing angle precision check block, the round holes K1 and the top plane M5 are perpendicular, the round holes K5 and the reference plane M5 are respectively perpendicular, the round holes K5 and the round holes K5 are respectively perpendicular to the reference plane M5, the round holes K5 and the round holes K5 are respectively, the round holes are respectively perpendicular to the bottom plane M5 and the reference plane M5, one point of the round holes 5 and the axis of the round holes 5 is intersected with the reference plane M5, the round holes 5 and the round holes 5, the round holes 5 are parallel to one point 5, the round holes 5 and the round holes 5, the round holes 5 are intersected with the axis of the reference plane M5, when precision calibration is needed, a coordinate system is established by installing and fixing the swing angle precision calibration block on a machine tool workbench and by aligning a group of holes and surface characteristics on the top surface of the swing angle precision calibration block in a swing angle-free vertical state; then the main shaft of the machine tool is operated to a horizontal state, the error value of the machine tool in the state can be determined by aligning the actual coordinate value of a group of corresponding holes and surface features on the side surface of the swing angle precision check block in the coordinate system and comparing the actual coordinate value with a theoretical value, the precision check of the machine tool is completed, the error value is compensated and enters the coordinate system, the hole and surface features on the swing angle precision check block are rechecked, the error value is zero or less than the requirement of part manufacture on the error value, the compensation of the vertical-horizontal conversion machine tool error can be realized, and the compensation of all directions can be realized, and the method is simple and easy to implement.
3. The invention can respectively compensate in each direction, and can guarantee the complex part processing and high-precision size processing of the machine tool.
Drawings
The invention will be further described in detail with reference to the drawings and the detailed description, wherein:
FIG. 1 is a schematic structural diagram of a swing angle precision check block according to the present invention;
FIG. 2 is a schematic view of the vertical calibration of the numerically controlled machine tool of the present invention;
FIG. 3 is a schematic view of the horizontal calibration of the numerically controlled machine tool according to the present invention;
the labels in the figure are: 1. the device comprises a machine tool spindle, 2, a probe, 3, a pressure plate, 4, a machine tool workbench, 5 and a swing angle precision calibration block.
Detailed Description
Example 1
Referring to fig. 1-3, a method for verifying the swing angle accuracy of a numerical control machine tool comprises the following steps:
a. mounting, namely mounting a swing angle precision check block 5 on a machine tool workbench 4;
b. adjusting, namely adjusting the swing angle precision check block 5 to enable the reference plane M3 to be parallel to the X axis of the machine tool coordinate system and enable the top plane M5 to be parallel to the XY plane of the machine tool coordinate system;
c. fixing, namely applying pressure to the pressure plate 3 after the adjustment is finished, and fixing the swing angle precision check block 5 on the machine tool workbench 4;
d. aligning, namely finding out an X coordinate value and a Y coordinate value of the hole center of the reference hole K1 in a machine tool coordinate system by using a dial indicator or a probe 2, finding out a Z coordinate value of the top plane M5 in the machine tool coordinate system, and establishing a coordinate system;
e. vertical-horizontal conversion, namely, operating the machine tool spindle 1 to A90 degrees, wherein the machine tool spindle 1 points to the positive direction of the X axis, and the axis of the machine tool spindle 1 is parallel to the axis of the reference hole K2;
f. secondary alignment, namely aligning the Y coordinate value and the Z coordinate value of the hole center of the datum hole K2 in a coordinate system, and aligning the X coordinate value of the datum plane M2 in a machining coordinate system;
g. comparing the coordinate measured values of the reference hole K2 and the reference surface M2 with theoretical values to obtain deviation values delta X, delta Y and delta Z, which are machine tool precision error values of the machine tool in the horizontal state;
h. and f, after checking the precision errors of the swing angles in the corresponding directions of the machine tool, compensating the deviation values delta X, delta Y and delta Z into the corresponding processing coordinate system, and performing rechecking until the deviation values delta X, delta Y and delta Z of all the axes are zero or less than the requirements of the parts on the errors in the manufacturing process.
A, mounting, namely mounting a swing angle precision check block 5 on a machine tool workbench 4; b. adjusting, namely adjusting the swing angle precision check block 5 to enable the reference plane M3 to be parallel to the X axis of the machine tool coordinate system and enable the top plane M5 to be parallel to the XY plane of the machine tool coordinate system; c. fixing, namely applying pressure to the pressure plate 3 after the adjustment is finished, and fixing the swing angle precision check block 5 on the machine tool workbench 4; d. aligning, namely finding out an X coordinate value and a Y coordinate value of the hole center of the reference hole K1 in a machine tool coordinate system by using a dial indicator or a probe 2, finding out a Z coordinate value of the top plane M5 in the machine tool coordinate system, and establishing a coordinate system; e. vertical-horizontal conversion, namely, operating the machine tool spindle 1 to A90 degrees, wherein the machine tool spindle 1 points to the positive direction of the X axis, and the axis of the machine tool spindle 1 is parallel to the axis of the reference hole K2; f. secondary alignment, namely aligning the Y coordinate value and the Z coordinate value of the hole center of the datum hole K2 in a coordinate system, and aligning the X coordinate value of the datum plane M2 in a machining coordinate system; g. comparing the coordinate measured values of the reference hole K2 and the reference surface M2 with theoretical values to obtain deviation values delta X, delta Y and delta Z, which are machine tool precision error values of the machine tool in the horizontal state; h. after the precision errors of the pivot angles in the corresponding directions of the machine tool are checked, the deviation values delta X, delta Y and delta Z are compensated into the corresponding processing coordinate system, and the step f is executed for rechecking until the deviation values delta X, delta Y and delta Z of all the axes are zero or less than the requirements of parts on the errors in manufacturing.
Example 2
Referring to fig. 1-3, a method for verifying the swing angle accuracy of a numerical control machine tool comprises the following steps:
a. mounting, namely mounting a swing angle precision check block 5 on a machine tool workbench 4;
b. adjusting, namely adjusting the swing angle precision check block 5 to enable the reference plane M3 to be parallel to the X axis of the machine tool coordinate system and enable the top plane M5 to be parallel to the XY plane of the machine tool coordinate system;
c. fixing, namely applying pressure to the pressure plate 3 after the adjustment is finished, and fixing the swing angle precision check block 5 on the machine tool workbench 4;
d. aligning, namely finding out an X coordinate value and a Y coordinate value of the hole center of the reference hole K1 in a machine tool coordinate system by using a dial indicator or a probe 2, finding out a Z coordinate value of the top plane M5 in the machine tool coordinate system, and establishing a coordinate system;
e. vertical-horizontal conversion, namely, operating the machine tool spindle 1 to A90 degrees, wherein the machine tool spindle 1 points to the positive direction of the X axis, and the axis of the machine tool spindle 1 is parallel to the axis of the reference hole K2;
f. secondary alignment, namely aligning the Y coordinate value and the Z coordinate value of the hole center of the datum hole K2 in a coordinate system, and aligning the X coordinate value of the datum plane M2 in a machining coordinate system;
g. comparing the coordinate measured values of the reference hole K2 and the reference surface M2 with theoretical values to obtain deviation values delta X, delta Y and delta Z, which are machine tool precision error values of the machine tool in the horizontal state;
h. and f, after checking the precision errors of the swing angles in the corresponding directions of the machine tool, compensating the deviation values delta X, delta Y and delta Z into the corresponding processing coordinate system, and performing rechecking until the deviation values delta X, delta Y and delta Z of all the axes are zero or less than the requirements of the parts on the errors in the manufacturing process.
In the step a, the swing angle accuracy check block 5 is a cuboid structure and comprises a pressing ring groove C1 located at the lower part, a bottom plane M6, a reference plane M1 located at the upper part, a reference plane M3, a reference plane M2 and a reference plane M4, wherein the reference plane M1 is parallel to the reference plane M3, the reference plane M2 is parallel to the reference plane M4, the reference plane M1 is perpendicular to the reference plane M2, and the reference plane M1, the reference plane M3, the reference plane M2 and the reference plane M4 are perpendicular to the top plane M5 respectively, the swing angle precision check block 5 is provided with a round hole K1, a round hole K2 and a round hole K3, the round hole K1 is perpendicular to the top plane M5, the round hole K2 is perpendicular to the reference plane M2 and the reference plane M4 respectively, the round hole K3 is perpendicular to the reference plane M1 and the reference plane M3 respectively, the round hole K1, the round hole K2 and the round hole K3 are perpendicular to different surfaces, the hole axes of the round hole K1, the round hole K2 and the round hole K3 intersect at one point, the bottom plane M6 is parallel to the top plane M5, and a chamfer D1 is arranged at the intersection edge of the reference plane M2 and the reference plane M3.
Example 3
Referring to fig. 1-3, a method for verifying the swing angle accuracy of a numerical control machine tool comprises the following steps:
a. mounting, namely mounting a swing angle precision check block 5 on a machine tool workbench 4;
b. adjusting, namely adjusting the swing angle precision check block 5 to enable the reference plane M3 to be parallel to the X axis of the machine tool coordinate system and enable the top plane M5 to be parallel to the XY plane of the machine tool coordinate system;
c. fixing, namely applying pressure to the pressure plate 3 after the adjustment is finished, and fixing the swing angle precision check block 5 on the machine tool workbench 4;
d. aligning, namely finding out an X coordinate value and a Y coordinate value of the hole center of the reference hole K1 in a machine tool coordinate system by using a dial indicator or a probe 2, finding out a Z coordinate value of the top plane M5 in the machine tool coordinate system, and establishing a coordinate system;
e. vertical-horizontal conversion, namely, operating the machine tool spindle 1 to A90 degrees, wherein the machine tool spindle 1 points to the positive direction of the X axis, and the axis of the machine tool spindle 1 is parallel to the axis of the reference hole K2;
f. secondary alignment, namely aligning the Y coordinate value and the Z coordinate value of the hole center of the datum hole K2 in a coordinate system, and aligning the X coordinate value of the datum plane M2 in a machining coordinate system;
g. comparing the coordinate measured values of the reference hole K2 and the reference surface M2 with theoretical values to obtain deviation values delta X, delta Y and delta Z, which are machine tool precision error values of the machine tool in the horizontal state;
h. and f, after checking the precision errors of the swing angles in the corresponding directions of the machine tool, compensating the deviation values delta X, delta Y and delta Z into the corresponding processing coordinate system, and performing rechecking until the deviation values delta X, delta Y and delta Z of all the axes are zero or less than the requirements of the parts on the errors in the manufacturing process.
In the step a, the swing angle accuracy check block 5 is a cuboid structure and comprises a pressing ring groove C1 located at the lower part, a bottom plane M6, a reference plane M1 located at the upper part, a reference plane M3, a reference plane M2 and a reference plane M4, wherein the reference plane M1 is parallel to the reference plane M3, the reference plane M2 is parallel to the reference plane M4, the reference plane M1 is perpendicular to the reference plane M2, and the reference plane M1, the reference plane M3, the reference plane M2 and the reference plane M4 are perpendicular to the top plane M5 respectively, the swing angle precision check block 5 is provided with a round hole K1, a round hole K2 and a round hole K3, the round hole K1 is perpendicular to the top plane M5, the round hole K2 is perpendicular to the reference plane M2 and the reference plane M4 respectively, the round hole K3 is perpendicular to the reference plane M1 and the reference plane M3 respectively, the round hole K1, the round hole K2 and the round hole K3 are perpendicular to different surfaces, the hole axes of the round hole K1, the round hole K2 and the round hole K3 intersect at one point, the bottom plane M6 is parallel to the top plane M5, and a chamfer D1 is arranged at the intersection edge of the reference plane M2 and the reference plane M3.
In the step h, the step of checking the precision error of the corresponding direction swing angle of the machine tool specifically means that the main shaft 1 of the machine tool points to the negative direction of the X axis, the positive direction of the Y axis and the negative direction of the Y axis respectively under the horizontal state of A90 degrees, and the step f and the step g are repeated, so that the error value of each direction under the corresponding swing angle state is obtained.
In step a, the swing angle precision check block 5 is a cuboid structure, and comprises a pressing ring groove C1, a bottom plane M6, a reference plane M1, a reference plane M3, a reference plane M2 and a reference plane M4 which are positioned at the lower part, a reference plane M1 and a reference plane M3 which are positioned at the upper part are parallel, a reference plane M2 and a reference plane M4 which are positioned at the upper part are parallel, a reference plane M1 and a reference plane M2 which are positioned at the upper part are perpendicular, a reference plane M1, a reference plane M3, a reference plane M2 and a reference plane M4 which are respectively perpendicular to a top plane M5, a circular hole K1, a circular hole K2 and a circular hole K3 are formed on the swing angle precision check block 5, the circular hole K1 is perpendicular to the top plane M5, the circular hole K5 is perpendicular to the reference plane M5 and the reference plane M5, the circular hole K5 is perpendicular to the reference plane M5, the circular hole K5 and the circular hole K5 are respectively parallel to the bottom plane M5, a point of the circular hole M5 and the reference plane 5 is perpendicular to the circular hole 5, the circular hole 5 and the circular hole 5 are respectively, a circular hole 5 is arranged at the reference plane 5, a point 5, the axis of the circular hole 5 and a circular hole 5, the circular hole 5 is perpendicular to the circular hole 5, and a circular hole 5, a circular hole 5 is arranged at the circular hole 5, a point 5, a circular hole 5 is arranged at a circular hole 5, a point 5, and a circular hole 5, a circular hole 5 is arranged at a point 5, and a circular hole 5, a circular hole 5 is arranged at a circular hole 5, a circular hole 5 is arranged at a circular hole 5, a circular hole 5 is arranged at a circular hole 5, a circular hole, when precision calibration is needed, a coordinate system is established by installing and fixing the swing angle precision calibration block 5 on the machine tool workbench 4 and by aligning a group of holes and surface characteristics on the top surface of the swing angle precision calibration block 5 in a swing angle-free vertical state; then the machine tool main shaft 1 is operated to a horizontal state, the error value of the machine tool in the state can be determined by aligning the actual coordinate value of a group of corresponding holes and surface characteristics on the side surface of the swing angle precision check block 5 in the coordinate system and comparing the actual coordinate value with a theoretical value, the machine tool precision check is completed, the error value is compensated and enters the coordinate system, the hole and surface characteristics on the swing angle precision check block 5 are rechecked, the error value is zero or less than the requirements of part manufacturing on the error value, the compensation of the vertical-horizontal conversion machine tool error can be realized, and the compensation of each direction can be realized, and the method is simple and easy.
Example 4
Referring to fig. 1-3, a method for verifying the swing angle accuracy of a numerical control machine tool comprises the following steps:
a. mounting, namely mounting a swing angle precision check block 5 on a machine tool workbench 4;
b. adjusting, namely adjusting the swing angle precision check block 5 to enable the reference plane M3 to be parallel to the X axis of the machine tool coordinate system and enable the top plane M5 to be parallel to the XY plane of the machine tool coordinate system;
c. fixing, namely applying pressure to the pressure plate 3 after the adjustment is finished, and fixing the swing angle precision check block 5 on the machine tool workbench 4;
d. aligning, namely finding out an X coordinate value and a Y coordinate value of the hole center of the reference hole K1 in a machine tool coordinate system by using a dial indicator or a probe 2, finding out a Z coordinate value of the top plane M5 in the machine tool coordinate system, and establishing a coordinate system;
e. vertical-horizontal conversion, namely, operating the machine tool spindle 1 to A90 degrees, wherein the machine tool spindle 1 points to the positive direction of the X axis, and the axis of the machine tool spindle 1 is parallel to the axis of the reference hole K2;
f. secondary alignment, namely aligning the Y coordinate value and the Z coordinate value of the hole center of the datum hole K2 in a coordinate system, and aligning the X coordinate value of the datum plane M2 in a machining coordinate system;
g. comparing the coordinate measured values of the reference hole K2 and the reference surface M2 with theoretical values to obtain deviation values delta X, delta Y and delta Z, which are machine tool precision error values of the machine tool in the horizontal state;
h. and f, after checking the precision errors of the swing angles in the corresponding directions of the machine tool, compensating the deviation values delta X, delta Y and delta Z into the corresponding processing coordinate system, and performing rechecking until the deviation values delta X, delta Y and delta Z of all the axes are zero or less than the requirements of the parts on the errors in the manufacturing process.
In the step a, the swing angle accuracy check block 5 is a cuboid structure and comprises a pressing ring groove C1 located at the lower part, a bottom plane M6, a reference plane M1 located at the upper part, a reference plane M3, a reference plane M2 and a reference plane M4, wherein the reference plane M1 is parallel to the reference plane M3, the reference plane M2 is parallel to the reference plane M4, the reference plane M1 is perpendicular to the reference plane M2, and the reference plane M1, the reference plane M3, the reference plane M2 and the reference plane M4 are perpendicular to the top plane M5 respectively, the swing angle precision check block 5 is provided with a round hole K1, a round hole K2 and a round hole K3, the round hole K1 is perpendicular to the top plane M5, the round hole K2 is perpendicular to the reference plane M2 and the reference plane M4 respectively, the round hole K3 is perpendicular to the reference plane M1 and the reference plane M3 respectively, the round hole K1, the round hole K2 and the round hole K3 are perpendicular to different surfaces, the hole axes of the round hole K1, the round hole K2 and the round hole K3 intersect at one point, the bottom plane M6 is parallel to the top plane M5, and a chamfer D1 is arranged at the intersection edge of the reference plane M2 and the reference plane M3.
In the step h, the step of checking the precision error of the corresponding direction swing angle of the machine tool specifically means that the main shaft 1 of the machine tool points to the negative direction of the X axis, the positive direction of the Y axis and the negative direction of the Y axis respectively under the horizontal state of A90 degrees, and the step f and the step g are repeated, so that the error value of each direction under the corresponding swing angle state is obtained.
In the step a, a press plate 3 and a plurality of pressing grooves are arranged on a machine tool workbench 4, the pressing grooves are parallel to each other, and a swing angle precision check block 5 is installed on the pressing grooves through the press plate 3.
Can compensate respectively to each direction, carry out complicated parts machining and high accuracy size processing to the lathe and can provide the guarantee.
Claims (4)
1. A method for verifying the swing angle precision of a numerical control machine tool is characterized by comprising the following steps:
a. mounting, namely mounting the swing angle precision check block (5) on a machine tool workbench (4);
b. adjusting, namely adjusting a swing angle precision check block (5) to enable a reference plane M3 to be parallel to an X axis of a machine tool coordinate system and enable a top plane M5 to be parallel to an XY plane of the machine tool coordinate system;
c. fixing, namely applying pressure to the pressure plate (3) after the adjustment is finished, and fixing the swing angle precision check block (5) on the machine tool workbench (4);
d. aligning, namely finding out an X coordinate value and a Y coordinate value of the hole center of the reference hole K1 in a machine tool coordinate system by using a dial indicator or a probe (2), finding out a Z coordinate value of the top plane M5 in the machine tool coordinate system, and establishing the coordinate system;
e. vertical-horizontal conversion, namely, operating the machine tool spindle (1) to A90 degrees, wherein the machine tool spindle (1) points to the positive direction of the X axis, and the axis of the machine tool spindle (1) is parallel to the axis of the reference hole K2;
f. secondary alignment, namely aligning the Y coordinate value and the Z coordinate value of the hole center of the datum hole K2 in a coordinate system, and aligning the X coordinate value of the datum plane M2 in a machining coordinate system;
g. comparing the coordinate measured values of the reference hole K2 and the reference surface M2 with theoretical values to obtain deviation values delta X, delta Y and delta Z, which are machine tool precision error values of the machine tool in the horizontal state;
h. and f, after checking the precision errors of the swing angles in the corresponding directions of the machine tool, compensating the deviation values delta X, delta Y and delta Z into the corresponding processing coordinate system, and performing rechecking until the deviation values delta X, delta Y and delta Z of all the axes are zero or less than the requirements of the parts on the errors in the manufacturing process.
2. The method for verifying the swing angle precision of the numerical control machine tool according to claim 1, characterized in that: in the step a, the swing angle precision check block (5) is of a cuboid structure and comprises a pressing ring groove C1 positioned at the lower part, a bottom plane M6, a reference plane M1 positioned at the upper part, a reference plane M3, a reference plane M2 and a reference plane M4, wherein the reference plane M1 is parallel to the reference plane M3, the reference plane M2 is parallel to the reference plane M4, the reference plane M1 is perpendicular to the reference plane M2, and the reference plane M1, the reference surface M3, the reference surface M2 and the reference surface M4 are perpendicular to the top plane M5 respectively, the swing angle precision check block (5) is provided with a round hole K1, a round hole K2 and a round hole K3, the round hole K1 is perpendicular to the top plane M5, the round hole K2 is perpendicular to the reference surface M2 and the reference surface M4 respectively, the round hole K3 is perpendicular to the reference surface M1 and the reference surface M3 respectively, the round hole K1, the round hole K2 and the round hole K3 are perpendicular to different surfaces, the hole axes of the round hole K1, the round hole K2 and the round hole K3 intersect at one point, the bottom plane M6 is parallel to the top plane M5, and a chamfer D1 is arranged at the intersection side of the reference surface M2 and the reference surface M3.
3. The method for verifying the swing angle precision of the numerical control machine tool according to claim 1, characterized in that: in the step h, the step of checking the precision error of the corresponding direction swing angle of the machine tool specifically means that the main shaft (1) of the machine tool points to the negative direction of the X axis, the positive direction of the Y axis and the negative direction of the Y axis respectively under the horizontal state of A90 degrees, and the step f and the step g are repeated, so that the error value of each direction under the corresponding swing angle state is obtained.
4. The method for verifying the swing angle precision of the numerical control machine tool according to claim 1, characterized in that: in the step a, a press plate (3) and a plurality of pressing grooves are arranged on a machine tool workbench (4), the pressing grooves are parallel to each other, and a swing angle precision check block (5) is installed on the pressing grooves through the press plate (3).
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