CN111381562B - Error correction method and system for arc corner processing equipment - Google Patents
Error correction method and system for arc corner processing equipment Download PDFInfo
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Abstract
An error correction method and system for arc corner processing equipment, wherein the arc corner processing equipment comprises a milling cutter, and the error correction method for the arc corner processing equipment comprises the following steps: setting initial operation parameters according to a preset machining program, wherein the initial operation parameters comprise clamping parameters, dimension inspection standards, cutting directions of the cutting tool and correction directions; acquiring predetermined detection data in product processing, including an actual milling diameter of the milling cutter; analyzing the detection data and calculating correction parameters according to a preset correction model; distributing the correction parameters to corresponding processing equipment; correcting the processing parameters of the corresponding processing equipment according to the correction parameters; and judging the abnormality of the processing equipment according to the processing direction, the correction direction and the correction parameters of the processing equipment, thereby reducing the time and labor required by the machine adjustment of the processing equipment and accelerating the machine adjustment efficiency.
Description
Technical Field
The invention relates to the field of machining, in particular to an error correction method and system for arc corner machining equipment.
Background
Currently, most industrial workshops are manufactured by computer numerical control (computer numerical control, CNC), which is an automated machine controlled by a program, which logically processes a program defined by a control code or other symbol instruction, decodes the program by a computer, and causes the machine to perform a predetermined operation, and cuts a blank into a workpiece such as a semi-finished product or a finished part by a cutter. In the prior art, the tuning operation for CNC is generally: and when the reject ratio of the checked workpiece reaches a certain range, dispatching the CNC through technical experience of a technician, or dispatching the CNC according to a preset dispatching scheme by the technician. However, a technician is required to perform machine adjustment operation on the CNC according to the inspection condition of the workpiece, so that human resources are consumed, and the realization of an intelligent factory under the current Internet of things system cannot be realized.
Disclosure of Invention
In view of the foregoing, it is necessary to provide a method and a system for correcting errors of arc corner processing equipment, which reduce the time and labor required for machine adjustment of the processing equipment and accelerate the machine adjustment efficiency.
The error correction method of the arc corner processing equipment is applied to an error correction system of the arc corner processing equipment, wherein the arc corner processing equipment comprises a milling cutter, and the error correction method of the arc corner processing equipment comprises the following steps:
setting initial operation parameters according to a preset machining program, wherein the initial operation parameters comprise clamping parameters, dimension inspection standards, cutting directions of the cutting tool and correction directions;
acquiring predetermined detection data in product processing, including an actual milling diameter of the milling cutter;
analyzing the detection data and calculating correction parameters according to a preset correction model;
distributing the correction parameters to corresponding processing equipment;
correcting the processing parameters of the corresponding processing equipment according to the correction parameters; and
Judging abnormality of the processing equipment according to the processing direction, the correction direction and the correction parameters of the processing equipment, comprising the steps of:
assigning a value to the cutting direction and the correction direction according to a preset rule;
calculating a determination parameter=cutting direction correction parameter;
and judging whether the actual milling diameter of the cutting tool is inward shrinkage or outward expansion according to the judging parameters.
Preferably, the step of assigning a value to the cutting direction and the correction direction according to a predetermined rule includes:
for a cutter with a machining direction of down milling, the cutting direction is assigned to be 1, the correction direction is assigned to be-1 when the correction direction is preset to be forward correction, at the moment, the correction value corresponding to the outward expansion offset of the center machining track line of the cutter is assigned to be a positive value, and the correction value corresponding to the inward contraction offset of the center machining track line of the cutter is assigned to be a negative value; the correction direction is preset to be +1 when the reverse correction is performed, at the moment, the correction value corresponding to the outward expansion offset of the center processing track line of the cutter is assigned to be a negative value, and the correction value corresponding to the inward contraction offset of the center processing track line of the cutter is assigned to be a positive value;
for a cutter with a machining direction of reverse milling, assigning a value of minus 1 to the cutting direction, assigning a value of minus 1 to the correction direction when the correction direction is preset to be positive correction, assigning a value of minus corresponding to the outward expansion offset of the center machining track line of the cutter to a negative value, and assigning a value of plus corresponding to the inward contraction offset of the center machining track line of the cutter to a positive value; the correction direction is assigned to +1 when the correction is scheduled to be in reverse correction, at the moment, the correction value corresponding to the expansion offset of the center processing track line of the cutter is positive, and the correction value corresponding to the contraction offset of the center processing track line of the cutter is negative;
the step of judging whether the actual milling diameter of the cutting tool is inward shrinkage or outward expansion according to the judging parameter comprises the following steps:
the tool is retracted when the determination parameter >0, and the tool is extended when the determination parameter < 0.
Preferably, the method further comprises the steps of: when the shrinkage of the cutter exceeds a first preset value, the processing equipment error correction system sends out an alarm signal and prompts to check the deflection of the corresponding cutter;
when the expansion of the cutter is judged to exceed a second preset value, the processing equipment error correction system sends out an alarm signal to prompt the replacement of the cutter.
Preferably, the step of setting the initial operation parameters according to a predetermined machining program includes:
initializing an error correction system of the arc corner processing equipment;
setting the initial operation parameters of the arc corner processing equipment error correction system.
Preferably, the step of acquiring predetermined detection data in the product processing includes:
processing the product by processing equipment according to the preset processing program;
and detecting preset parameters of the processed product according to the initial operation parameters, and obtaining the preset detection data.
Preferably, the step of detecting the predetermined parameter of the processed product according to the initial operation parameter is implemented by off-board detection or manual detection.
Preferably, before the step of analyzing the detection data, the method further comprises the step of:
grabbing detection data; and
The detection data is transmitted over a communication network.
Preferably, the step of analyzing the detection data includes:
setting a safety interval, a correction interval and an alarm interval according to the tolerance range of the size inspection standard;
judging the interval of the detection data; when the detection data fall in a safe interval, stopping executing the subsequent steps; when the detection data fall in the correction interval, executing the subsequent steps; and when the detection data fall in the alarm interval, stopping executing the subsequent steps and alarming.
Preferably, the step of calculating the correction parameter according to a predetermined correction model includes:
establishing the relation of the key size according to the processing procedure and the positioning reference;
calculating the correction parameters of the corresponding critical dimensions according to the detection data, the detection parameters and the correlation of the critical dimensions; and
A correction parameter file readable by the processing tool is generated.
Preferably, the method further comprises the steps of:
storing the detection data and the correction parameters;
carrying out big data analysis on the stored detection data and the correction parameters; and
And correcting or improving the correction model based on the result of the big data analysis.
Preferably, the method further comprises the steps of:
providing a data connection port for connecting an external terminal;
generating a human-computer interaction interface at the connected external terminal; and
And the error correction method of the arc corner processing equipment is completed through monitoring or controlling of the external terminal.
An arc corner machining apparatus error correction system comprising:
a processor; and
A storage medium;
the storage medium stores a plurality of instructions;
the instructions are adapted to be loaded by the processor and to perform the arc corner processing apparatus error correction method described previously.
According to the error correction method and the error correction system for the arc corner processing equipment, the initial operation parameters such as the clamping parameters and the dimension inspection standards are set according to the preset processing program, after the preset detection data in the product processing are obtained, the detection data are analyzed, the correction parameters are calculated according to the preset correction model, the correction parameters are distributed to the corresponding processing equipment, the processing parameters of the corresponding processing equipment are corrected according to the correction parameters, the time and the labor required by the machine adjustment of the processing equipment can be reduced, and the machine adjustment efficiency is accelerated.
Drawings
FIG. 1 is a schematic diagram of the logic structure of a process tool error correction system in a preferred embodiment.
FIG. 2 is a flow chart of a method for error correction of a processing tool in a preferred embodiment.
Fig. 3 is a flow chart illustrating an initial operation parameter setting process according to a predetermined processing program in the error correction method of the processing apparatus of fig. 2.
Fig. 4 is a flow chart of acquiring predetermined detection data in product processing in the error correction method of the processing equipment of fig. 2.
Fig. 5 is a flowchart illustrating the step of detecting the predetermined parameters of the processed product according to the initial operation parameters and obtaining the predetermined detection data in fig. 4.
Fig. 6 is a flowchart illustrating a step of analyzing detection data in the error correction method of the processing apparatus of fig. 2.
FIG. 7 is an additional flow chart of a method for error correction of a processing tool in another preferred embodiment.
FIG. 8 is a schematic diagram of steps for setting a safety zone, a correction zone and an alarm zone according to the tolerance ranges of the dimension inspection standard in an embodiment.
FIG. 9 is a schematic diagram of a step of establishing a critical dimension association according to a process recipe and a positional reference in one embodiment.
FIG. 10 is a schematic diagram of a correction parameter following correction according to size correlation.
Fig. 11 is a schematic diagram for determining the type of tool abnormality.
Fig. 12 is a schematic diagram of an embodiment of generating a correction parameter file in the error correction method of the processing apparatus of fig. 2.
Description of the main reference signs
500. Error correction system for processing equipment
100. Storage medium
200. Processor and method for controlling the same
The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
As shown in fig. 1, the processing equipment error correction system 500 includes a processor 200 and a storage medium 100.
The storage medium 100 stores therein a plurality of instructions adapted to be loaded by the processor 200 and to perform a process tool error correction method.
Referring to fig. 2 to 7, the process equipment error correction method is applied to the process equipment error correction system 500, and includes the following steps.
S101, setting initial operation parameters according to a preset machining program. The initial operating parameters include clamping parameters and dimension inspection standards.
For example, when machining a predetermined part by a machining apparatus, such as a CNC, the dimensional parameters, form and position tolerance parameters, clamping positions and dimensional inspection standards of the part may be set according to a predetermined machining program, by which a subsequent reference analysis may be facilitated.
In a preferred embodiment, the step of setting the initial operation parameters according to the predetermined processing program may specifically include the following steps.
S1011, initializing the processing equipment error correction system 500.
S1012. setting the initial operation parameters of the process equipment error correction system 500. The initial operating parameters may be written to the storage medium 100.
S102, acquiring preset detection data in product processing.
In an implementation, the predetermined inspection data may be critical dimensions of the part to be machined. The critical dimension is detected and obtained in the middle of processing according to the process requirement, and can also be detected and obtained after the processing is completed according to the process requirement.
In a preferred embodiment, the step S102 of acquiring predetermined detection data in the product processing may specifically include the following steps.
S1021, processing the product by processing equipment according to the preset processing program.
S1022, detecting preset parameters of the processed product according to the initial operation parameters, and obtaining the preset detection data.
The step S1022 of detecting the predetermined parameter of the processed product according to the initial operation parameter may be implemented by off-board detection or manual detection.
According to the requirements of the working procedure, the corresponding parts can be manually sent to be inspected during the part processing or after the part processing is completed. For example, the parts to be inspected may be sent to a detector meeting the inspection accuracy requirement for size inspection, and the obtained inspection data may be transmitted and recorded.
In a specific implementation, the step S1022 of detecting the predetermined parameter of the processed product according to the initial operation parameter and obtaining the predetermined detection data may specifically include the following steps.
S1022a, capturing detection data. For example, in a specific implementation, the part to be detected may be sent to a detector meeting the detection precision requirement for size detection, where a part of the detected size is a critical size. Therefore, the critical dimension can be grasped from the dimensions obtained by the detection according to a predetermined rule, and the analysis efficiency in the later stage can be improved.
S1022b, transmitting the detection data through a communication network.
S103, analyzing the detection data, and calculating correction parameters according to a preset correction model.
The correction model can be a correction model established based on artificial intelligence. In practical applications, the correction model can be continuously optimized by manual intervention correction or by machine learning based on data acquisition and recording.
In a preferred embodiment, the step of analyzing the detection data may specifically include the following steps.
S1031, setting a safety interval, a correction interval and an alarm interval according to the tolerance range of the dimension test standard.
For example, referring to fig. 8, in one embodiment, taking the tolerance range of the size checking standard as the standard interval, then:
the safety interval may be set as: (50% -150) ×standard interval.
The correction interval can be set as: (150% -180%) standard interval, and (20% -50%) standard interval.
The alarm interval can be set as follows: (180% -Max%) standard interval and (-50% -Min%) standard interval.
S1032, judging the section where the detection data are located.
When the error or deviation corresponding to the detection data falls in the safety zone, the execution of the subsequent steps is stopped, namely, the machining precision of the equipment meets the requirement of the working procedure, and the correction is not needed, so that the execution of the subsequent correction steps can be stopped.
And when the error or deviation corresponding to the detection data falls in the correction interval, executing the subsequent steps. That is, the error correction method of the processing equipment is continuously executed to correct the processing precision of the processing equipment.
And when the detection data fall in the alarm interval, stopping executing the subsequent steps and alarming. In this case, it is determined that the machining accuracy deviation of the machining equipment is too large, and the machining accuracy deviation cannot be corrected to an accuracy that meets the machining requirements by correction, so that the subsequent correction step is stopped, and an alarm is presented.
Through the division of the intervals, the detection data can be preprocessed, subsequent invalid calculation is avoided, and therefore the data processing efficiency is improved. Meanwhile, the operation condition of the processing equipment is convenient to know in time, and the processing accidents are avoided.
In a preferred embodiment, before the step of setting the safety zone, the correction zone, and the alarm zone according to the tolerance range of the dimension inspection standard, the method may further include the steps of: screening the detection data according to a preset rule and the size inspection standard.
The step of screening the detection data according to predetermined rules and the size inspection criteria may specifically include the following steps.
Presetting an ideal value of the detection data according to the size inspection standard;
determining a screening range according to the ideal value floating preset proportion;
screening the obtained detection data according to the screening range;
calculating a first standard deviation by using the screened detection data;
removing the maximum value or the minimum value in the screened detection data, and then calculating a second standard deviation;
when the second standard deviation is greater than the first standard deviation, the group of data is unevenly distributed and abnormal data exists, so that the group of detection data is deleted. The set of data is retained when the second standard deviation is less than the first standard deviation.
In a specific implementation, the step of calculating the correction parameter according to the predetermined correction model may specifically include the following steps.
S1033, establishing the relation of the critical dimension according to the machining procedure and the positioning reference.
If there is a relationship between a first dimension and a second dimension during the processing of the component, for example, the second dimension is based on the first dimension processed in the previous step, then when the first dimension is compensated, the tolerance of the second dimension will correspondingly change. Similarly, when a plurality of dimensions are related to each other, it is necessary to establish a relationship between these critical dimensions according to the machining process and the positioning reference, and when one of the dimensions is corrected, the other related dimensions can be corrected in a related manner.
For example, referring to fig. 9, the dimension A1 is used as a reference dimension during the processing of a part. Dimensions B1, B2, B3, B4, B5 are referenced to dimension A1, dimension C1 is referenced to dimension B1, dimension C2, C3 are referenced to dimension B2, dimension D1 is referenced to dimension C1, dimensions D2, D3, D4 are referenced to dimension B5, dimension E1 is referenced to dimension D1, and dimension E6 is referenced to dimension D2.
Correspondingly, when the correction is performed for the dimension A1, the dimensions B1, B2, B3, B4, B5, C1, C2, C3, D1, D2, D3, D4, E1, E6 all need to follow the correction. After the correction of the dimension B1, the dimensions C1, D1, E1 need to follow the correction. After the correction of the dimension B2, the dimensions C2 and C3 need to follow the correction. After the correction of the dimension B5, the dimensions D2, D3, D4 need to follow the correction. The rest are the same. That is, after the correction is performed with respect to the reference size, the correction parameter is avoided by following the correction with respect to the reference size.
Referring to fig. 10, the dimension a has a dimension check standard of 10, the detection data of the dimension relative to the reference plane S of 10.05, and the corresponding correction parameter of-0.05.
The dimension B is based on the dimension a, the dimension checking standard of the dimension B is 15, the detection data of the dimension B is 14.97, the dimension B needs to be adjusted by +0.03, and the correction parameter corresponding to the dimension B after being correlated with the dimension a is +0.03+ (-0.05) = -0.02.
The dimension C takes the dimension B as a reference standard, the dimension inspection standard of the dimension C is 14, the detection data of the dimension C is 14.02, the dimension C needs to be adjusted by-0.02, and the correction parameter corresponding to the dimension C after being correlated with the dimension B is-0.02+ (-0.02) = -0.04.
The dimension D is used as a reference standard, the dimension inspection standard of the dimension D is 7, the detection data of the dimension D is 7.01, the dimension D needs to be adjusted by +0.01, and the correction parameter corresponding to the dimension D after being correlated with the dimension C is +0.01+ (-0.04) = -0.03.
In addition, when the variation of the dimension of the subsequent processing, that is, the corresponding correction parameter, has exceeded the tolerance range of the subsequent processing, the correction parameter of the dimension corresponding to the preceding process may be corrected reversely.
S1034, calculating the correction parameters of the corresponding critical dimensions according to the detection data, the detection parameters and the correlation of the critical dimensions.
During machining, correction of the tool of the machining apparatus includes correction of the height and correction of the rotation diameter. For example, in machining a plane, correction of the tool is usually correction in the height direction. In the course of machining, for example, a rounded corner, the tool typically requires modification of the deflection diameter.
The tool, for example a milling tool, is ideally rotated about its main axis without deflection, the milling diameter of the tool then being 10.00mm. In the actual use process, the cutter main shaft can generate outward-expansion deflection due to the influence of gravity of the cutter main shaft or the stability of clamping.
For example, in such an abnormal situation the deflection of the tool is 0.20mm, the actual milling diameter of the tool is phi 10.20mm. At this time, the too large deflection of the cutter can cause the excessive milling of the side wall or the side surface to be processed of the product, and adjustment and correction are needed, namely, the milling diameter of the cutter needs to be adjusted in a shrinking way. A specific adjustment may be to offset the center machining trajectory of the tool by 0.20mm.
In the actual use process, the tool spindle does not swing, but the milling end of the tool is worn to reduce the milling diameter. In this case, the center machining path line of the tool needs to be adjusted to ensure the machining dimension. The specific adjustment mode can be to expand the center processing track line of the cutter by a corresponding size of offset abrasion.
In a preferred embodiment, the machining apparatus expands or contracts a predetermined dimension along a predetermined center machining path line of the tool when correcting the machining path of the tool, and the predetermined dimension of the offset is the correction parameter. The tool error correction system 500 may signal an alarm when the correction parameter exceeds a predetermined limit. For example, when the correction parameter is greater than the radius of the arc corner to be processed, the start point or the end point of the arc to be processed cannot be intersected, and at this time, the processing device error correction system 500 may send an alarm signal to prompt an abnormality.
In addition, in order for the machining apparatus error correction system 500 to automatically determine whether the tool of the machining apparatus is expanding or contracting with respect to the center machining trajectory line thereof, a determination parameter may be introduced to assist in determining an abnormality of the machining apparatus in combination with the above-described alarm mechanism.
As shown in fig. 11, for example, the abnormality determination is performed for a milling tool of a machining apparatus, and the determination parameter=cutting direction×correction value.
And the cutting direction is assigned to 1, the correction direction is assigned to-1 when the correction direction is preset to be positive correction, at the moment, the correction value corresponding to the expansion offset of the center processing track line of the cutter is positive, and the correction value corresponding to the contraction offset of the center processing track line of the cutter is negative. The correction direction is assigned +1 when the correction is in the reverse direction, and at this time, the correction value corresponding to the expansion shift of the center processing track line of the tool is negative, and the correction value corresponding to the contraction shift of the center processing track line of the tool is positive.
And (3) for the cutter with the machining direction of reverse milling, assigning a value of minus 1 to the cutting direction, assigning a value of minus 1 to the correction direction when the correction direction is preset to be positive correction, wherein the correction value corresponding to the expansion offset of the center machining track line of the cutter is negative, and the correction value corresponding to the contraction offset of the center machining track line of the cutter is positive. The correction direction is set to +1 when the correction is performed in the reverse direction, and at this time, the correction value corresponding to the expansion shift of the center processing track line of the tool is set to a positive value, and the correction value corresponding to the contraction shift of the center processing track line of the tool is set to a negative value.
The method for judging the abnormality of the milling cutter according to the judging parameters comprises the following steps: the tool is retracted when the determination parameter >0, and the tool is extended when the determination parameter < 0. Accordingly, an alarm rule for tool abnormality may be set, for example, when it is determined that the tool is retracted more than 0.02mm, the machining apparatus error correction system 500 issues an alarm signal and rechecks the deflection of the corresponding tool; when the expansion of the cutter reaches more than 0.05mm, the cutter is seriously worn, and the processing equipment error correction system 500 sends out an alarm signal to prompt the replacement of the cutter.
S1035, generating a correction parameter file readable by processing equipment.
S104, distributing the correction parameters to corresponding processing equipment.
S105, correcting the machining parameters of the corresponding machining equipment according to the correction parameters, so that the sizes of the parts machined by the machining equipment meet the preset precision requirements.
Since the correction is made, in a preferred embodiment, the above steps S101 to S105 may be repeated to check whether the machining size corresponding to the digital machining apparatus meets the size checking standard requirement through the correction, and at the same time, further correct the size which does not meet the size checking standard requirement after the correction.
Specifically, after the first execution of the steps S101 to S105, the size detection data generated by the digital processing device after correction according to the correction parameter file is obtained, and according to the size detection data obtained again and the size inspection standard, a correction value of a corresponding size is calculated through a predetermined correction model, so as to generate a correction parameter file readable by the digital processing device; and distributing the correction parameter file to the corresponding digital processing equipment so that the corresponding digital processing equipment automatically corrects the size to be corrected again according to the correction parameter file, and repeating the steps until all the size detection data completely meet the size inspection standard.
Referring to FIG. 12, in an implementation, generating a correction parameter file readable by a processing tool may include the following steps.
And obtaining the address corresponding to the custom parameter of the processing equipment. For example, in implementations, taking a CNC device as an example, the CNC device typically includes various types of custom parameters that can be defined and set by the user to enable control of the CNC device.
Taking a CNC device as an example, it includes the following custom parameters, which are used as variables, marked with a code and pointed to a predetermined address:
local variables #1 to #33.
Global variables # 100- #500.
Macro program variables #501 to #999.
#1000 above.
G54 machining coordinate system is X: #5221, Y: #5222.
G55 machining coordinate system is X: #5241, Y: #5242.
G56 machining coordinate system is X: #5261, Y: #5262.
P1 additional coordinate system X: #7001, Y: #7002.
P2 additional coordinate system X: #7021, Y: #7022.
P3 additional coordinate system X: #7041, Y: #7042.
H represents Z-direction compensation, D represents XY-direction compensation, and is marked as follows:
length abrasion variables H1 to H999= #10001 to #10999.
The length compensation variables are H1-H999= # 11001- #11999.
Radius abrasion variables D1 to d999= #12001 to #12999.
Radius compensation variables are D1 to D999= #13001 to #13999.
The codes corresponding to these # appended numbers can be considered as addresses corresponding to custom parameters of the processing equipment.
And formulating calculation logic corresponding to the self-defined parameters according to the correction model, and pointing the correction parameters obtained according to the calculation logic to addresses corresponding to the self-defined parameters to obtain correction parameter files comprising the correction parameters and the corresponding addresses.
The correction parameter file is in a format readable by the processing equipment. For example, the correction parameter file includes a code corresponding to a predetermined custom parameter of the processing apparatus and remark information. The custom parameters comprise local variables for adjusting local processing parameters of processing equipment, global variables for adjusting global processing parameters of the processing equipment, macro program variables for adjusting the correction model and equipment system variables for adjusting the processing equipment. The code corresponding to each custom parameter is a preset code of processing equipment and is used as an address corresponding to the custom parameter. The correction parameters obtained by the calculation logic point to the corresponding codes, and the processing equipment can read the corresponding parameters through the codes and correct the corresponding processing parameters accordingly.
The remark information is used for remarking the correction parameter file. For example, referring to fig. 12, COL1 is a code for pointing to the local variable, global variable, macro program variable, or equipment system variable, and the correction parameter obtained by the calculation logic points to the corresponding code, so that the correction parameter is substituted into the processing equipment in a format readable by the processing equipment. In the figure, a COL2 column is a correction parameter obtained by calculation, and points to a corresponding code in the COL 1. In the figure, COL3 is remark information, and can be used to annotate correction parameters or standard inspection dimensions corresponding to the correction parameters. The remark information may include multiple sets, for illustrative purposes only. Correspondingly, taking a correction parameter file as an example, the format of the correction parameter file may be O0066 (×tiao×ji-P2) (× B L), where O0066 is a code (×tiao×ji-P2) is first remark information, and (× B L) is second remark information.
And distributing the correction parameter file to the corresponding processing equipment.
And the equipment reads the correction parameter file to obtain correction parameters and correct the machining parameters of the corresponding machining equipment.
In a preferred embodiment, the processing equipment error correction method may further include the following steps.
S106, storing the detection data and the correction parameters. In a specific implementation, the detection data and the correction parameters may be detection data and correction parameters corresponding to a plurality of collected processing devices and corresponding products.
S107, analyzing the stored detection data and the correction parameters.
S108, correcting or improving the correction model based on the result of the big data analysis, so that the correction model is continuously optimized.
In a preferred embodiment, the processing equipment error correction method may further include the following steps.
S110, providing a data connection port for connecting an external terminal.
S120, generating a human-computer interaction interface at the connected external terminal.
S130, the error correction method of the processing equipment is completed through monitoring or controlling of the external terminal.
In implementations, the process tool error correction system 500 may be applied in a variety of contexts. For example, the process tool error correction system 500 may operate in a server mode of application and a stand-alone mode of application. The following describes the error correction method of the processing equipment.
When the tool error correction system 500 is operating in a server application mode, the tool error correction system 500 may include a client computer, a correction server, and a data server. At this time, the processing equipment error correction system 500 corrects the processing parameters for a plurality of processing equipment. The plurality of devices are interconnected by an internal network.
The client computer, correction server, and data server include the processor 200 and the storage device 100.
In a specific implementation, the client computer, the correction server, the data server, the external terminal and the controller of the processing equipment can be in communication connection based on a TCP/IP protocol so as to realize communication of control instructions and interaction of data.
The client computer is configured to initialize the process tool error correction system 500 and set the initial operating parameters of the process tool error correction system 500. For example, in implementations, the client computer may be a personal computer running a Windows system, and the client may be a browser-based application program, such as a Chrome browser, firefox browser, or an application program developed based on the NET platform.
The client computer can realize the functions of importing standard inspection specification data, importing dimension inspection standard, setting machine table data of processing equipment, setting clamping parameters of products to be processed, issuing correction calculation commands to the correction calculation server, inspecting the progress of correction calculation, inspecting the distribution condition of the correction parameters and the like.
The correction operation server can run a Windows system. And the correction operation server stores a plurality of groups of instruction sets in advance. For example, the correction operation server stores a data analysis module, a circular arc corner module, a correlation dimension module, a data filtering module, a correction interval module and a correction control module in advance, and each module corresponds to a group of instruction sets for realizing the preset functions. The correction operation server can call the corresponding instruction set through JDK+Tomcat+FocasAPI and the like to realize the corresponding function.
The data server may be a MySQL database server running Windows or Linux systems.
Meanwhile, the client computer can be used for providing a data connection port to be connected with an external terminal, such as a computer or a mobile terminal such as a mobile phone and a tablet personal computer, so as to perform man-machine interaction through the external terminal, such as checking the change of correction parameters, checking the correction effect or manually controlling correction.
The parts to be detected can be sent to a detector meeting the detection precision requirement for size detection, and the part of the detected size is the critical size. The process tool error correction system 500 captures critical dimensions from the detected dimensions according to predetermined rules and transmits the critical dimensions to the correction server via a network interface or wireless network.
The correction server analyzes the detection data. For example, when the error or deviation corresponding to the detected data falls within the safety zone, the control may stop executing the subsequent step, that is, the machining accuracy of the equipment meets the process requirement, and the correction is not required, so that the execution of the subsequent correction step may be stopped. And when the detection data fall in the alarm interval, stopping executing the subsequent steps and alarming. In this case, it is determined that the machining accuracy deviation of the machining equipment is too large, and the machining accuracy deviation cannot be corrected to an accuracy that meets the machining requirements by correction, so that the subsequent correction step is stopped, and an alarm is presented. When the error or deviation corresponding to the detection data falls in the correction section, performing correction calculation according to a preset correction model, generating a correction parameter file and performing data backup.
The correction parameter file is transmitted to the processing device via a communication connection. In an implementation, the correction parameter file may be distributed to multiple processing devices simultaneously. And the processing equipment processes the next product after correcting the processing parameters according to the correction parameter file. The data server acquires and stores the detection data, the correction parameter file, the processing parameters corrected by a plurality of devices and the like through communication connection and stores the data, meanwhile, the stored data is subjected to big data analysis, and a correction model is corrected or improved based on the big data analysis result, so that the correction model is continuously optimized.
In addition, the data server can also analyze the correction of the same size of a plurality of devices so as to analyze the difference of processing devices caused by the environmental influence of different machines. Meanwhile, engineering stability analysis can be performed on multiple sizes of a single machine.
The process tool error correction system 500 may be used in a variety of situations when operating in a stand-alone mode of application.
In one scenario, the process tool error correction system 500 operates on a desktop or notebook computer, and the data store also operates on the desktop or notebook computer. Specifically, the processor 200 of the processing apparatus error correction system 500 may be a processor of a desktop computer or a notebook computer, and the storage medium 100 corresponds to a storage unit of the desktop computer or the notebook computer, such as a hard disk.
The storage unit of the desktop computer or the notebook computer stores the plurality of instructions, and the instructions are suitable for being loaded by a processor of the desktop computer or the notebook computer and executing the processing equipment error correction method.
In this case, the error correction method of the processing device is the same as that in the server application mode, and the difference is that the desktop computer or the notebook computer integrates the functions of the system server, the correction server and the data server.
In addition, when a plurality of processing devices are networked, the computer is connected to the local area network, and the correction parameters are distributed to the corresponding processing devices. When a plurality of processing devices are not networked, the computer is connected with each processing device one by one through a network cable, and transmits correction parameters to the processing devices.
The desktop computer or the notebook computer starts Web service, a WiFi environment is built by utilizing convenient hardware such as portable WiFi, the mobile terminal is connected with the WiFi and accesses the Web service, and correction software is controlled or instant data is checked.
The situation has low requirement on hardware, does not need to install an additional server, and is suitable for small factories.
In another scenario, the process tool error correction system 500 operates in a black box, as does the data store. For example, a black box is a small microcomputer running the Windows system.
Specifically, the processor 200 of the processing apparatus error correction system 500 may be a black box processor, and the storage medium 100 may be a storage unit of a black box, such as a hard disk.
The software in the black box must be bound to hardware (e.g., CPUID, network card ID) or other schemes are used to prevent the software therein from being stolen.
When using a black box, a client computer is matched, for example, the client computer is connected through a network cable, or a display is connected to the black box. After the initial operation parameters and the detection data are imported, correction parameters are calculated by the black box and are sent to processing equipment connected with the correction parameters. The result of the correction calculation and the process of sending to the processing equipment can be visually seen from the client computer or the display, so that the user can use the processing equipment with ease.
The black box can have WiFi function and Web service, and is convenient for the mobile terminal to access. The black box is provided with a power supply and an electric quantity indicator lamp.
In yet another scenario, the black box has only one portal and cannot connect both the client computer and the processing equipment. When in use, the client computer or the display and the black box can be connected first, and then the detection data is written into the black box and the correction calculation is executed. And then disconnecting, connecting the black box with processing equipment, pressing a preset button on the black box, triggering a command to write the correction parameters into the processing equipment, and simultaneously, indicating whether the writing is successful or not by an indicator lamp on the black box.
In addition, execution time consuming algorithms can be put into PC client execution to reduce hardware configuration requirements for the black box.
In the above processing equipment error correction method and the processing equipment error correction system 500, after the initial operation parameters such as the clamping parameters and the dimension inspection standard are set according to the predetermined processing program, the predetermined detection data in the product processing is obtained, the detection data is analyzed, the correction parameters are calculated according to the predetermined correction model, the correction parameters are distributed to the corresponding processing equipment, and the processing parameters of the corresponding processing equipment are corrected according to the correction parameters, so that the time and the labor required by the machine adjustment of the processing equipment can be reduced, and the machine adjustment efficiency can be accelerated.
Specifically, the above-described processing equipment error correction method and processing equipment error correction system 500 have the following improvements.
1. And the cost expenditure is reduced.
1. Can make the processing performance of the old equipment and can process high-precision products under proper maintenance.
2. The equipment can debug the product processing precision in place within a few materials, and the cost waste is reduced.
3. The system assists the machine-adjusting personnel, greatly reduces the machine-adjusting difficulty, reduces the time required by machine-adjusting and the machine-adjusting manpower, and accelerates the machine-adjusting efficiency.
2. And (5) optimizing the quality.
1. For the product to be processed, the first piece and the last piece are detected once daily, and the detection is needed once after the tool is changed, so that the detection frequency can be reduced.
2. Based on the critical dimensions, a logical relationship can be established, reducing the number of measurement points.
3. And (5) intelligently assisting in decision making.
1. The state of the processing tool or the processing equipment can be analyzed from the processing result of the product and the correction history data, and the real-time maintenance and the preventive maintenance can be performed.
2. And (5) through a result of system analysis, assisting engineering personnel in rapidly checking the problem.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (9)
1. The error correction method for the arc corner processing equipment is applied to an error correction system of the arc corner processing equipment, and the arc corner processing equipment comprises a milling cutter and is characterized by comprising the following steps:
setting initial operation parameters according to a preset machining program, wherein the initial operation parameters comprise clamping parameters, dimension inspection standards, cutting direction of a cutting tool and correction direction;
acquiring predetermined detection data in product processing, including an actual milling diameter of the milling cutter;
analyzing the test data, including predetermining an ideal value for the test data based on the dimension inspection criteria; determining a screening range according to the ideal value floating preset proportion; screening the obtained detection data according to the screening range; calculating a first standard deviation by using the screened detection data; removing the maximum value or the minimum value in the screened detection data, and then calculating a second standard deviation; deleting the set of detection data when the second standard deviation is greater than the first standard deviation; when the second standard deviation is less than the first standard deviation, the set of detection data is retained; calculating correction parameters according to a preset correction model, wherein the correction parameters comprise the relation of key dimensions according to the machining procedure and positioning references; calculating the correction parameters of the corresponding critical dimensions according to the detection data, the detection parameters and the correlation of the critical dimensions; generating a correction parameter file readable by processing equipment, and reversely correcting the correction parameter of the critical dimension corresponding to the processing procedure in front of the critical dimension according to the relation of the critical dimension when the correction parameter of the critical dimension is larger than the tolerance range of the critical dimension;
distributing the correction parameters to corresponding processing equipment;
correcting the processing parameters of the corresponding processing equipment according to the correction parameters; and
Judging abnormality of the processing equipment according to the processing direction, the correction direction and the correction parameters of the processing equipment, comprising the steps of:
assigning a value to the cutting direction and the correction direction according to a preset rule;
calculating a determination parameter=cutting direction correction parameter;
and judging whether the actual milling diameter of the cutting tool is inward shrinkage or outward expansion according to the judging parameters.
2. The method of correcting an error in a corner processing apparatus according to claim 1, wherein the step of assigning values to the cutting direction and the correction direction according to a predetermined rule comprises:
for a cutter with a machining direction of down milling, the cutting direction is assigned to be 1, the correction direction is assigned to be-1 when the correction direction is preset to be forward correction, at the moment, the correction value corresponding to the outward expansion offset of the center machining track line of the cutter is assigned to be a positive value, and the correction value corresponding to the inward contraction offset of the center machining track line of the cutter is assigned to be a negative value; the correction direction is preset to be +1 when the reverse correction is performed, at the moment, the correction value corresponding to the outward expansion offset of the center processing track line of the cutter is assigned to be a negative value, and the correction value corresponding to the inward contraction offset of the center processing track line of the cutter is assigned to be a positive value;
for a cutter with a machining direction of reverse milling, assigning a value of minus 1 to the cutting direction, assigning a value of minus 1 to the correction direction when the correction direction is preset to be positive correction, assigning a value of minus corresponding to the outward expansion offset of the center machining track line of the cutter to a negative value, and assigning a value of plus corresponding to the inward contraction offset of the center machining track line of the cutter to a positive value; the correction direction is assigned to +1 when the correction is scheduled to be in reverse correction, at the moment, the correction value corresponding to the expansion offset of the center processing track line of the cutter is positive, and the correction value corresponding to the contraction offset of the center processing track line of the cutter is negative;
the step of judging whether the actual milling diameter of the cutting tool is inward shrinkage or outward expansion according to the judging parameter comprises the following steps:
the tool is retracted when the determination parameter >0, and the tool is extended when the determination parameter < 0.
3. The arc corner processing apparatus error correction method according to claim 2, further comprising the step of: when the shrinkage of the cutter exceeds a first preset value, the processing equipment error correction system sends out an alarm signal and prompts to check the deflection of the corresponding cutter;
when the expansion of the cutter is judged to exceed a second preset value, the processing equipment error correction system sends out an alarm signal to prompt the replacement of the cutter.
4. The arc corner processing apparatus error correction method according to claim 1, wherein the step of acquiring predetermined detection data in the product processing comprises:
processing the product by processing equipment according to the preset processing program;
detecting preset parameters of the processed product according to the initial operation parameters to obtain preset detection data;
the step of detecting the preset parameters of the processed product according to the initial operation parameters is realized by an off-board detection or manual detection mode.
5. The arc corner processing apparatus error correction method according to claim 1, further comprising, before the step of analyzing the detection data, the step of:
grabbing detection data; and
The detection data is transmitted over a communication network.
6. The arc corner processing apparatus error correction method according to claim 1, wherein the step of analyzing the detection data includes:
setting a safety interval, a correction interval and an alarm interval according to the tolerance range of the size inspection standard;
judging the interval of the detection data; when the detection data fall in a safe interval, stopping executing the subsequent steps; when the detection data fall in the correction interval, executing the subsequent steps; and when the detection data fall in the alarm interval, stopping executing the subsequent steps and alarming.
7. The arc corner processing apparatus error correction method according to claim 1, further comprising the step of:
storing the detection data and the correction parameters;
carrying out big data analysis on the stored detection data and the correction parameters; and
And correcting or improving the correction model based on the result of the big data analysis.
8. The arc corner processing apparatus error correction method according to claim 1, further comprising the step of:
providing a data connection port for connecting an external terminal;
generating a human-computer interaction interface at the connected external terminal; and
And the error correction method of the arc corner processing equipment is completed through monitoring or controlling of the external terminal.
9. An arc corner machining apparatus error correction system comprising:
a processor; and
A storage medium; the storage medium stores a plurality of instructions;
the method is characterized in that: the instructions are adapted to be loaded by the processor and to perform the arc corner processing apparatus error correction method of any one of claims 1-8.
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