CN114789363A - Compensation method and system for improving machining center precision and storage medium - Google Patents
Compensation method and system for improving machining center precision and storage medium Download PDFInfo
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Abstract
The invention discloses a method, a system and a storage medium for improving the precision compensation of a machining center, wherein the method is applied to a system for improving the precision compensation of the machining center, the system for improving the precision compensation of the machining center comprises a clamp, a radio head and a receiver, the clamp is arranged on an A/B shaft of the machining center, a first calibration hole and a second calibration hole are sequentially arranged in the clamp from outside to inside, and the method comprises the following steps: when the radio measuring head receives a cyclic measurement instruction sent by the controller, the first calibration hole and the second calibration hole are measured in sequence, and the central position information of the first calibration hole and the second calibration hole is obtained; calculating the deformation condition of the clamp according to the central position information of the first calibration hole and the second calibration hole; and compensating the workpiece coordinate system in the A/B axis direction according to the deformation condition of the clamp. Compared with the prior art, the invention reduces the number of sensors and the cost; the deviation of temperature deformation compensation caused by no induction of the sensor is reduced; the stability and the start-up rate of the equipment are improved.
Description
Technical Field
The invention relates to the technical field of engine manufacturing, in particular to a compensation method and a compensation system for improving the precision of a machining center and a storage medium.
Background
At present, the device for conveying and positioning the skip car in the industry mainly adopts the following scheme:
1. acquiring thermal deformation data of a main shaft through a temperature sensor, a laser measuring head and a cooling controller, wherein the thermal deformation associated data mainly comprises various mechanical structure temperatures, rotating speeds and the like;
2. compensating the main shaft by adopting a matlab high-dimensional curve fitting thermal error formula;
such a solution has the following drawbacks:
1. the sensor signal collection is more, and the failure rate is higher;
2. no detection is made of the deformation of the clamp device itself;
3. the formula algorithm is complex, and the operation efficiency is low;
4. the universality is low, and the customization and development of a single device are required.
Disclosure of Invention
The invention mainly aims to provide a compensation method, a compensation system and a storage medium for improving the precision of a machining center, and aims to reduce the number of sensors, reduce the maintenance cost and the spare part cost, reduce the deviation of temperature deformation compensation caused by no induction of the sensors and improve the stability and the starting rate of equipment.
In order to achieve the above object, the present invention provides a method for improving machining center accuracy compensation, which is applied to a system for improving machining center accuracy compensation, and comprises a clamp, a radio head and a receiver, wherein the clamp is mounted on an a/B axis of a machining center, the clamp is provided with a first calibration hole and a second calibration hole in sequence from outside to inside, and the method comprises the following steps:
when the radio measuring head receives a cyclic measurement instruction sent by the controller, the first calibration hole and the second calibration hole are measured in sequence, and the central position information of the first calibration hole and the second calibration hole is obtained;
calculating the deformation condition of the clamp according to the central position information of the first calibration hole and the second calibration hole;
and compensating the workpiece coordinate system in the A/B axis direction according to the deformation condition of the clamp.
A further technical solution of the present invention is that the step of sequentially measuring the first calibration hole and the second calibration hole and obtaining the center position information of the first calibration hole and the second calibration hole comprises:
reading the last equipment closing time of the machining center;
judging whether the last equipment closing time of the machining center is more than 60 minutes from the current time interval;
if yes, cold circulation starting is carried out, and the radio probe is called to measure a calibration ring when each workpiece is machined.
The further technical scheme of the invention is that the step of starting the cold cycle and calling the radio measuring head to measure and calibrate the ring after each workpiece is processed further comprises the following steps:
judging whether the measurement cycle is more than five pieces;
if yes, returning to the step of judging whether the last equipment closing time of the machining center is more than 60 minutes from the current time interval;
if not, returning to execute the step of entering the cold cycle starting, and calling the radio probe to measure the calibration ring once every time one workpiece is processed.
The invention further adopts the technical scheme that the step of judging whether the last equipment closing time of the machining center is more than 60 minutes with the current time interval further comprises the following steps:
if not, judging whether the last time of closing the equipment in the machining center is more than 20 minutes from the current time interval;
if not, entering a conventional cycle, and calling the radio head to measure the calibration ring once every ten workpieces are processed.
If yes, entering a semi-cold starting cycle, and calling the radio probe to measure a calibration ring once every four workpieces are processed;
the further technical scheme of the invention is that the step of entering a semi-cold start cycle and calling the radio probe to measure and calibrate the ring once every four workpieces are processed further comprises the following steps:
judging whether the measurement cycle is more than five;
if yes, returning to the step of judging whether the last equipment closing time of the machining center is more than 20 minutes from the current time interval;
if not, returning to execute the step of entering the semi-cold starting cycle, and calling the radio probe to measure the calibration ring once every four workpieces are processed.
The invention further adopts the technical scheme that four points, namely an upper point, a lower point, a left point and a right point, are respectively arranged in the first calibration hole and the second calibration hole, the first calibration hole and the second calibration hole are sequentially measured, and the step of acquiring the central position information of the first calibration hole and the second calibration hole comprises the following steps:
measuring a first point in the first calibration hole at an angle of 45 degrees with the horizontal direction X axis, recording the distance from the center point to the first point of the movement stroke as L1, and calculating position information (X1, Y1) of the first point, wherein X1 is cos45 degrees L1, Y1 is sin45 degrees L1;
measuring a second point in the first calibration hole at 135 degrees from the X axis in the horizontal direction, recording the distance from the central point to the second point of the movement stroke as L2, and calculating the position information (X2, Y2) of the second point, wherein X2 is cos45 degrees L2, and Y2 is sin45 degrees L2;
measuring a third point in the first calibration hole at 225 degrees relative to the X axis in the horizontal direction, recording the distance from the center point to the third point of the movement stroke as L3, and calculating the position information (X3, Y3) of the first point, wherein X3 is cos45 degrees L3, Y1 is sin45 degrees L3;
measuring a fourth point in the first calibration hole at 315 degrees relative to the X axis in the horizontal direction, recording the distance from the central point to the fourth point of the movement stroke as L4, and calculating the position information (X4, Y4) of the first point, wherein X4 is cos45 degrees L4, Y4 is sin45 degrees L4;
calculating circle center position information (delta X1, delta Y1) of the first cross section where the first calibration hole is located, wherein delta X1 is (X1+ X3)/2+ (X2+ X4)/2, and delta Y1 is (Y1+ Y3)/2+ (Y2+ Y4)/2;
and similarly, calculating the center position information (Δ X2, Δ Y2) of the second cross section where the second calibration hole is located, wherein Δ X2 is (X5+ X7)/2+ (X6+ X8)/2, and Δ Y1 is (Y5+ Y7)/2+ (Y6+ Y8)/2.
According to a further technical scheme of the present invention, the step of calculating the deformation condition of the fixture according to the center position information of the first calibration hole and the second calibration hole includes:
and calculating the offset of the axis A and the axis B according to the delta X1, the delta Y1, the delta X2 and the delta Y2, wherein tan B is (delta X1-delta X2)/3, B is arctan (delta X1-delta X2)/3), tan A is (delta Y1-delta Y2)/3, and A is arctan (delta Y1-delta Y2)/3).
According to a further technical scheme of the present invention, the step of compensating the workpiece coordinate system in the a/B axis direction according to the deformation condition of the jig comprises:
and compensating the offset of the A axis and the offset of the B axis into the workpiece coordinate system.
In order to achieve the above object, the present invention further provides a machining center accuracy improving compensation system, which includes a fixture, a radio head and a receiver, the fixture being mounted on an a/B axis of a machining center, the fixture being sequentially provided with a first calibration hole and a second calibration hole from outside to inside, the system further including a memory, a processor, and a machining center accuracy improving compensation program stored on the processor, the machining center accuracy improving compensation program being executed by the processor to perform the steps of the method according to the above embodiment.
To achieve the above object, the present invention further provides a computer-readable storage medium storing a machining center accuracy improving compensation program, which when executed by a processor performs the steps of the method according to the above embodiment.
The invention has the beneficial effects that the compensation method, the compensation system and the storage medium for improving the precision of the machining center have the following advantages:
1. the number of sensors is reduced, and the maintenance cost and the spare part cost are reduced;
2. the deviation of temperature deformation compensation caused by no induction of the sensor is reduced;
3. the stability and the start-up rate of the equipment are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of a clamp;
FIG. 2 is a schematic diagram of a system for improving accuracy compensation of a machining center;
FIG. 3 is a flowchart illustrating a preferred embodiment of a method for improving machining center accuracy compensation according to the present invention;
FIG. 4 is a schematic diagram of compensation logic.
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a compensation method for improving the precision of a machining center, which is applied to a compensation system for improving the precision of the machining center shown in figures 1 and 2, wherein the compensation system for improving the precision of the machining center comprises a clamp 1, a radio measuring head 2 and a receiver 3, which are arranged on an A/B shaft of the machining center, and the clamp 1 is sequentially provided with a first calibration hole 4 and a second calibration hole (not shown in the figures) from outside to inside.
Compared with the prior art, the invention does not use a temperature sensor, a laser measuring head and a cooling controller, but uses a radio transmission signal measuring head instead, can reduce the number of sensors, reduce the failure rate, reduce the maintenance cost and the spare part cost, only detects the change of the mechanical position of the clamp 1 for compensation, has simple operation formula and high operation speed, has strong universality and can be realized only by equipping a calibration hole on the existing device.
As shown in fig. 3, the preferred embodiment of the method for improving the accuracy compensation of the machining center of the present invention comprises the following steps:
and step S10, when the radio measuring head receives the circular measurement instruction sent by the controller, sequentially measuring the first calibration hole and the second calibration hole to obtain the central position information of the first calibration hole and the second calibration hole.
And step S20, calculating the deformation condition of the clamp according to the center position information of the first calibration hole and the second calibration hole.
And step S30, compensating the workpiece coordinate system in the A/B axis direction according to the deformation condition of the clamp.
Specifically, as shown in fig. 4, in this embodiment, the step of sequentially measuring the first calibration hole and the second calibration hole and acquiring the center position information of the first calibration hole and the second calibration hole includes:
and reading the last equipment closing time of the machining center.
Judging whether the last equipment closing time of the machining center is more than 60 minutes away from the current time interval;
if yes, the cold cycle is started, and a wireless measuring head is called to measure a calibration ring every time one workpiece is machined.
Entering cold circulation starting, and after the step of calling the radio measuring head to measure the calibration ring for each workpiece, the method also comprises the following steps:
judging whether the measurement cycle is more than five pieces;
if yes, returning to the step of judging whether the last equipment closing time of the machining center and the current time interval are greater than 60 minutes;
if not, returning to execute the step of entering cold cycle starting, and calling the radio probe to measure the calibration ring once each workpiece is processed.
In this embodiment, the step of determining whether the time interval between the last time of turning off the equipment and the current time of the machining center is greater than 60 minutes further includes:
if not, judging whether the last equipment closing time of the machining center is more than 20 minutes from the current time interval;
if not, entering a conventional cycle, and calling the radio head to measure the calibration ring once every ten workpieces are processed.
If yes, entering a semi-cold starting cycle, and calling the radio head to measure and calibrate a ring once every four workpieces are processed;
in this embodiment, entering a semi-cold start cycle, the step of calling the radio probe to measure the calibration ring once every four workpieces is further followed by:
judging whether the measurement cycle is more than five pieces;
if yes, returning to the step of judging whether the last equipment closing time of the machining center is more than 20 minutes from the current time interval;
if not, returning to execute the step of entering a semi-cold starting cycle and calling the radio probe to measure the calibration ring once every four workpieces are processed.
In this embodiment, four points, upper, lower, left, and right, are respectively disposed in the first calibration hole and the second calibration hole, and the step of sequentially measuring the first calibration hole and the second calibration hole and acquiring the center position information of the first calibration hole and the second calibration hole includes:
measuring a first point in the first calibration hole at an angle of 45 degrees with the horizontal direction X axis, recording the distance from the center point to the first point of the movement stroke as L1, and calculating position information (X1, Y1) of the first point, wherein X1 is cos45 degrees L1, and Y1 is sin45 degrees L1;
measuring a second point in the first calibration hole at 135 degrees from the X axis in the horizontal direction, recording the distance from the central point to the second point of the movement stroke as L2, and calculating the position information (X2, Y2) of the second point, wherein X2 is cos45 degrees L2, and Y2 is sin45 degrees L2;
measuring a third point in the first calibration hole at 225 degrees with the X axis in the horizontal direction, recording the distance from the central point to the third point of the movement stroke as L3, and calculating the position information of the first point (X3, Y3), wherein X3 is cos45 degrees L3, and Y1 is sin45 degrees L3;
measuring a fourth point in the first calibration hole at 315 degrees relative to the X axis in the horizontal direction, recording the distance from the central point to the fourth point of the movement stroke as L4, and calculating the position information of the first point (X4, Y4), wherein X4 is cos45 degrees L4, and Y4 is sin45 degrees L4;
calculating center position information (delta X1 and delta Y1) of the first cross section where the first calibration hole is located, wherein delta X1 is (X1+ X3)/2+ (X2+ X4)/2, and delta Y1 is (Y1+ Y3)/2+ (Y2+ Y4)/2;
similarly, the center position information (Δ X2, Δ Y2) of the second cross section where the second calibration hole is located is calculated, where Δ X2 is (X5+ X7)/2+ (X6+ X8)/2, and Δ Y1 is (Y5+ Y7)/2+ (Y6+ Y8)/2.
The step of calculating the deformation condition of the clamp according to the central position information of the first calibration hole and the second calibration hole comprises the following steps:
the offset between the a axis and the B axis is calculated from Δ X1, Δ Y1, Δ X2, and Δ Y2, where tan B ═ Δ X1- Δ X2)/3, B ═ arctan (((Δ X1- Δ X2)/3), tan a ═ Δ (Δ Y1- Δ Y2)/3, and a ═ arctan ((Δy1- Δ Y2)/3).
The step of compensating the workpiece coordinate system in the A/B axis direction according to the deformation condition of the clamp comprises the following steps:
the offset of the A axis and the offset of the B axis are compensated to the workpiece coordinate system.
The method for improving the precision compensation of the machining center is further elaborated in the following.
In the invention, the clamp is arranged above an A/B shaft of a machining center, is provided with a first calibration hole and a second calibration hole, and is divided into three conditions of cold start, semi-cold start and normal circulation according to the time of a heat engine. And if the cold start stop time exceeds 60 minutes, performing measuring head detection on the first five processing cycles, performing measuring head detection on the semi-start processing cycle with the stop time of 20-60 minutes every 4 cycles, performing detection for 10 times, and then performing normal detection cycle, wherein detection is performed every 10 cycles.
The radio measuring head enters a first calibration hole for measurement after receiving a circular measurement instruction, mainly comprises four points of an upper point, a lower point, a left point and a right point for contact, records the coordinate position of the current measuring head after the contact, then moves 3mm to a second calibration hole in the vertical direction, and then performs measurement and coordinate position recording, so that the central positions of 2 calibration holes can be calculated by 8 coordinate positions, the deformation condition of the current clamp system can be calculated by the two central positions, the compensation of a workpiece coordinate system can be performed in the X/Y/A or B direction, the stability of the position degree of a processed hole or surface is ensured, and the invention is worthy of providing that the invention sets that the once adjustment quantity is less than 0.02mm, and if the single adjustment quantity is more than the value, the radio measuring head can automatically enter a re-detection and calculation program.
The compensation method for improving the precision of the machining center has the beneficial effects that:
1. the number of sensors is reduced, and the maintenance cost and the spare part cost are reduced;
2. the deviation of temperature deformation compensation caused by no induction of the sensor is reduced;
3. the stability and the start-up rate of the equipment are improved.
In order to achieve the above object, the present invention further provides a system for improving the machining center precision, which includes a clamp, a radio head and a receiver, the clamp is installed on the a/B axis of the machining center, the clamp is sequentially provided with a first calibration hole and a second calibration hole from outside to inside, the system further includes a memory, a processor and a program for improving the machining center precision stored on the processor, and when the program for improving the machining center precision is executed by the processor, the steps of the method as described in the above embodiments are executed, and are not described herein again.
In order to achieve the above object, the present invention further provides a computer-readable storage medium, where the computer-readable storage medium stores a program for improving precision compensation of a machining center, and when the program for improving precision compensation of the machining center is executed by a processor, the steps of the method according to the above embodiment are executed, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the specification and drawings, or any other related technical fields, which are directly or indirectly applied to the present invention, are included in the scope of the present invention.
Claims (10)
1. A method for improving machining center precision compensation is characterized by being applied to a system for improving machining center precision compensation and comprising a clamp, a radio head and a receiver, wherein the clamp is installed on an A/B shaft of a machining center and is sequentially provided with a first calibration hole and a second calibration hole from outside to inside, and the method comprises the following steps:
when the radio measuring head receives a cyclic measurement instruction sent by the controller, the first calibration hole and the second calibration hole are measured in sequence, and the central position information of the first calibration hole and the second calibration hole is obtained;
calculating the deformation condition of the clamp according to the central position information of the first calibration hole and the second calibration hole;
and compensating the workpiece coordinate system in the A/B axis direction according to the deformation condition of the clamp.
2. The method for improving the compensation of the machining center accuracy according to claim 1, wherein the step of sequentially measuring the first calibration hole and the second calibration hole and obtaining the information of the center positions of the first calibration hole and the second calibration hole comprises:
reading the last equipment closing time of the machining center;
judging whether the last equipment closing time of the machining center is more than 60 minutes from the current time interval;
and if so, starting a cold cycle, and calling the radio probe to measure a calibration ring every time one workpiece is machined.
3. The method for improving machining center accuracy compensation of claim 2, wherein the step of entering a cold cycle start, calling the radio head to measure a calibration ring for each workpiece machined further comprises:
judging whether the measurement cycle is more than five;
if yes, returning to the step of judging whether the last equipment closing time of the machining center is more than 60 minutes from the current time interval;
if not, returning to execute the step of entering the cold circulation starting, and calling the radio head to measure and calibrate the ring once each workpiece is processed.
4. The method for improving the accuracy compensation of the machining center according to claim 2, wherein the step of judging whether the last time the machining center is closed and the current time interval is greater than 60 minutes further comprises:
if not, judging whether the last equipment closing time of the machining center is more than 20 minutes from the current time interval;
if not, entering a conventional cycle, and calling the radio head to measure the calibration ring once every ten workpieces are processed.
If yes, entering a semi-cold starting cycle, and calling the radio probe to measure and calibrate the ring once every four workpieces are processed.
5. The method for improving machining center accuracy compensation of claim 4, wherein entering a semi-cold start cycle further comprises after the step of calling the radio head to measure a calibration ring every four workpieces being machined:
judging whether the measurement cycle is more than five;
if yes, returning to the step of judging whether the last equipment closing time of the machining center and the current time interval are greater than 20 minutes;
if not, returning to execute the step of entering the semi-cold starting cycle, and calling the radio probe to measure the calibration ring once every four workpieces are processed.
6. The method for improving the precision compensation of the machining center according to claim 1, wherein four points, i.e., an upper point, a lower point, a left point, a right point, and a left point, are respectively disposed in the first calibration hole and the second calibration hole, the step of sequentially measuring the first calibration hole and the second calibration hole, and the step of obtaining the center position information of the first calibration hole and the second calibration hole comprises:
measuring a first point in the first calibration hole at an angle of 45 degrees with the horizontal direction X axis, recording the distance from the center point to the first point of the movement stroke as L1, and calculating position information (X1, Y1) of the first point, wherein X1 is cos45 degrees L1, Y1 is sin45 degrees L1;
measuring a second point in the first calibration hole at 135 degrees from the X axis in the horizontal direction, recording the distance from the central point to the second point of the movement stroke as L2, and calculating the position information (X2, Y2) of the second point, wherein X2 is cos45 degrees L2, and Y2 is sin45 degrees L2;
measuring a third point in the first calibration hole at 225 degrees to the X axis in the horizontal direction, recording the distance from the central point to the third point of the movement stroke as L3, and calculating the position information of the first point (X3, Y3), wherein X3 is cos45 degrees L3, and Y1 is sin45 degrees L3;
measuring a fourth point in the first calibration hole at 315 degrees relative to the X axis in the horizontal direction, recording the distance from the central point to the fourth point of the movement stroke as L4, and calculating the position information of the first point (X4, Y4), wherein X4 is cos45 degrees L4, and Y4 is sin45 degrees L4;
calculating circle center position information (delta X1, delta Y1) of the first cross section where the first calibration hole is located, wherein delta X1 is (X1+ X3)/2+ (X2+ X4)/2, and delta Y1 is (Y1+ Y3)/2+ (Y2+ Y4)/2;
and similarly, calculating the center position information (Δ X2, Δ Y2) of the second cross section where the second calibration hole is located, wherein Δ X2 is (X5+ X7)/2+ (X6+ X8)/2, and Δ Y1 is (Y5+ Y7)/2+ (Y6+ Y8)/2.
7. The compensation method for improving the accuracy of the machining center according to claim 6, wherein the step of calculating the deformation of the fixture according to the center position information of the first calibration hole and the second calibration hole comprises:
and calculating the offset of the axis A and the axis B according to the delta X1, the delta Y1, the delta X2 and the delta Y2, wherein tan B is (delta X1-delta X2)/3, B is arctan (delta X1-delta X2)/3), tan A is (delta Y1-delta Y2)/3, and A is arctan (delta Y1-delta Y2)/3).
8. The method for improving the accuracy of a machining center according to claim 7, wherein the step of compensating the workpiece coordinate system for the a/B axis direction according to the deformation of the jig comprises:
and compensating the offset of the A axis and the offset of the B axis into the workpiece coordinate system.
9. A machining center accuracy enhancement compensation system comprising a fixture, a radio head and a receiver mounted on a machining center a/B axis, the fixture having a first calibration hole and a second calibration hole in sequence from outside to inside, the system further comprising a memory, a processor and a machining center accuracy enhancement compensation program stored on the processor, the machining center accuracy enhancement compensation program when executed by the processor performing the steps of the method of any one of claims 1 to 8.
10. A computer-readable storage medium, characterized in that it stores a machining center accuracy-enhancing compensation program which, when executed by a processor, performs the steps of the method according to any one of claims 1 to 8.
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