KR102266388B1 - Integrated module capable of inspection and calibration for qc data utilized in cnc machine - Google Patents

Abstract

The present invention relates to an integrated module for quality inspection and calibration using QC data for CNC machining, which comprises: a quality inspection unit as a linear variable differential transformer (LVDT) probe for extracting QC data including an machining error, a dimension, an outer diameter, an inner diameter, and a gradient of a machined component from a machining device; an inspection digital board unit for determining whether the quality is good or bad from the QC data extracted and generating metadata including index information when there is a defect in machining, which exceeds allowance; and a calibration digital board unit for determining an abrasion degree of a tool, based on the tool specs and determining whether there is heat distortion or not, based on information on temperature/humidity in the machining device to generate modified metadata, and outputting a real calibration value to the machining device. The integrated module for quality inspection and calibration using QC data for CNC machining according to the present invention uses QC data generated in a quality inspection device without generating data for calibration to process the same into calibration data, thereby making calibration of a machining device possible to reduce facility costs, enhance space utilization, reduce a tact time, decrease costs for data processing and reduce a load for data processing. Therefore, production costs for a component can be remarkably reduced.

Description

Integrated module for quality inspection and calibration utilizing qc data for CNC machining {INTEGRATED MODULE CAPABLE OF INSPECTION AND CALIBRATION FOR QC DATA UTILIZED IN CNC MACHINE}

The present invention relates to a quality inspection and calibration integrated module in which qc data for CNC machining is utilized, and more particularly, a quality inspection and calibration integration module in which qc data for CNC machining that can be calibrated using qc data is utilized. is about

Machining devices and machine tools represented by CNC or PLC are used to cut workpieces using cutting tools such as end mills and taps.

In general, parts machined through machining equipment inevitably have tolerances and errors. These errors can be caused by various factors, but typical examples are errors due to wear of cutting tools and changes in elongation caused by thermal deformation. There may be tolerances or errors due to vibration.

1 is a schematic configuration diagram of a quality inspection and calibration apparatus accompanying a conventional CNC machining apparatus.

As shown in Fig. 1, the inspection equipment 20 and the inspection process so-called QC process are essential to determine whether the parts processed by the machining device 100 such as CNC are within the allowable tolerance and check the good or bad products. . After the inspection data 21 is extracted and compared with the standard data to determine good/defective, a shipping step is performed.

In addition, if it is outside the allowable tolerance, it is necessary to correct the error of the processing device 100. When the tool is worn, the tool is replaced, and in the case of thermal deformation, a configuration to prevent thermal deformation must be provided. In case of static play, periodic calibration of the spindle or chuck is required.

Accordingly, in addition to the processing apparatus 100, alignment equipment 10 for origin/zero operation such as a spindle is also essential, and alignment data 11 is usually performed through a measurement method using a probe probe in addition to a designated jig configuration. ) and judging whether it is within the error range, the operator sorts manually in most cases.

However, since the alignment equipment 10 and the inspection equipment 20, which are additionally required for the processing device, are required in parallel, the equipment cost increases, space restrictions due to overlapping equipment follow, and the tact time increases. There is a problem.

In addition, there is a problem in that the cost of processing the inspection data and the alignment data is double generated and transmitted/received, and the load for processing them is also significant, thereby increasing the manufacturing cost of parts.

The present invention has been proposed to solve the above problems, and it is possible to calibrate the processing device after processing it into correction data using the qc data generated by the quality inspection device without generating the data for calibration, thereby reducing equipment costs and reducing space. Provides an integrated module for quality inspection and calibration that utilizes qc data for CNC machining that can significantly reduce the manufacturing cost of parts by increasing usability and reducing tact time, reducing data processing costs, and reducing the processing load do.

The quality inspection and calibration integrated module in which qc data for CNC machining is utilized according to the present invention for achieving the above object is qc data including machining error, dimension, outer diameter, inner diameter, and inclination for the parts processed from the machining device LVDT probe probe-type quality inspection unit for extracting; an inspection digital board unit that determines whether good/defective from the extracted qc data and generates metadata including index information in case of a processing defect exceeding an allowable tolerance; and a correction digital board unit for determining wear of the tool based on the tool specification, determining whether thermal deformation is present based on temperature/humidity information in the processing device, generating deformation metadata, and outputting an actual calibration value to the processing device may include

A data bus provided between the test digital board unit and the corrected digital board unit to transmit the metadata to the corrected digital board unit may be further included.

The inspection digital board unit, the raw material mill sheet or finished product specification sheet, based on one or more data of the tool information, a first PLC control unit for determining whether the quantity / defect of the part; and a metadata generator that generates the metadata when the part is defective.

The index information of the metadata may include each part sampling number, standard data, and tool specification corresponding to the corresponding qc data.

The correction digital board unit may include: a second PLC control unit configured to determine whether the tool is worn or whether the component is thermally deformed based on one or more data of wear information of the tool specification and temperature/humidity information in the device; a deformation metadata generating unit generating deformation metadata by calculating the metadata when the tool wear is less than a set value and not the thermal deformation; and a correction data output unit for generating and outputting a calibration value for finely rotating the displacement movement of the spindle or the angle of the spindle of the equipment.

The deformation metadata may include a sampling number of a corresponding part, a calculated value between the qc data in the standard data, and direction information of the calculated value.

The quality inspection and calibration integrated module in which the qc data for CNC machining according to the present invention is utilized, without generating the data for the calibration, using the qc data generated by the quality inspection device to process the correction data into correction data, and then calibrate the processing device. Costs can be reduced, space utilization can be increased, and tact time can be reduced.

In addition, the quality inspection and calibration integrated module in which qc data for CNC machining according to the present invention is utilized reduces data processing cost, and the load for processing it is also reduced, so that the manufacturing cost of parts can be significantly lowered.

In addition, since data can be transmitted through the data bus, the load for processing data is also reduced, so that the tool can be calibrated by quickly outputting it to the control unit of the processing apparatus.

1 is a schematic configuration diagram of a quality inspection and calibration apparatus accompanying a conventional CNC machining apparatus.
2 is a block diagram of a quality inspection and calibration integrated module in which qc data for CNC machining is utilized according to an embodiment of the present invention.
3 and 4 are flowcharts of a quality inspection and calibration integration module in which qc data for CNC machining is utilized according to an embodiment of the present invention.
5 and 6 are diagrams of the configuration of the inspection digital board unit and the correction digital board unit in the quality inspection and calibration integrated module in which qc data for CNC machining is utilized according to an embodiment of the present invention.
7 is a schematic block diagram of a data bus structure in an integrated quality inspection and calibration module in which qc data for CNC machining is utilized according to an embodiment of the present invention.

Hereinafter, an embodiment of an integrated quality inspection and calibration module utilizing qc data for CNC machining according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a quality inspection and calibration integrated module in which qc data for CNC machining is utilized according to an embodiment of the present invention, and FIGS. 3 and 4 are quality inspection in which qc data for CNC machining is utilized according to an embodiment of the present invention. And it is a flowchart of the integrated calibration module, Figures 5 and 6 is a configuration diagram of the configuration of the inspection digital board unit and the correction digital board unit in the quality inspection and calibration integrated module in which qc data for CNC machining is utilized according to an embodiment of the present invention , FIG. 7 is a schematic block diagram of a data bus structure in an integrated quality inspection and calibration module in which qc data for CNC machining is utilized according to an embodiment of the present invention.

The quality inspection and calibration integration module in which qc data for CNC machining according to an embodiment of the present invention is utilized is, as shown in FIGS. 2 to 7, machining errors, dimensions, outer diameters, LVDT probe probe-type quality inspection unit 200 for extracting qc data including inner diameter and slope; Inspection digital board unit 300 for determining whether good/defective from the extracted qc data and generating metadata including index information in case of processing failure exceeding the allowable tolerance; Determining the wear of the tool based on the tool specification, determining whether or not thermal deformation is based on temperature/humidity information in the processing apparatus 100, generates deformation metadata, and outputs an actual calibration value to the processing apparatus 100 a correction digital board 400; and a data bus 600 provided between the test digital board unit 300 and the corrected digital board unit 400 to transmit the metadata to the corrected digital board unit 400 .

The processing apparatus 100 mainly includes CNC equipment and PLC equipment, as shown in FIG. 2 . CNC (computer numerical control) equipment is a generic term for computer-based machine tools, and may include CNC lathes and CNC milling machines, and PLC means a central controller that controls automated production facilities, and processing devices (100 ) can be understood as indicating a facility for automated production of parts by a central controller.

The quality inspection unit 200 represents equipment for performing a quality inspection on parts processed through the processing apparatus 100 . Accordingly, the quality inspection unit 200 may be supplied with parts from the processing apparatus 100 and qc data such as processing errors, dimensions, outer diameters, inner diameters, and inclinations of the supplied parts or processed parts may be extracted.

The qc data of the quality inspection unit 200 is basic specification information of the processed part, and this specification information may be output on a separate screen (not shown).

In this embodiment, the quality inspection unit 200 may be a quality inspection unit 200 of a probe probe type of a linear variable differential transformer (LVDT) method in order to measure and inspect parts. Here, the LVDT can be used as a transducer with excellent characteristics while being less affected by environmental changes as it is appropriately applied to electromagnetic shielding and the structural shape of the measurement target. In the present invention, the quality inspection unit 200 uses the quality inspection unit 200 of the LVDT probe probe type, but is not limited thereto, and the quality inspection unit 200 is a quality inspection unit 200 of optical sensors such as transmission type photosensors. It will be free even if

The inspection digital board unit 300 may determine whether good/defective from the extracted qc data, and generate metadata including index information in case of processing failure exceeding an allowable tolerance.

The inspection digital board unit 300 is a first for determining whether or not the part is good/defective based on one or more data of a raw material mill sheet or a finished product specification sheet, mainly as shown in FIGS. 2, 3, and 5 . PLC control unit 320; and a metadata generator 330 that generates the metadata when the part is defective.

In addition, the test digital board unit 300 includes a constant voltage circuit 310 for supplying internal power, a communication unit 340 physically connected to an industrial PC (not shown) to communicate with a program for test equipment, and a plurality of analog It may include a filter 350 , a plurality of AD converters 360 for converting digital signals, and a plurality of input channels 370 from which qc data is extracted.

After the qc data sensed from the input channel 370 is amplified through the amplifier, the test digital board unit 300 converts the digital signal in the AD converter 360 and passes through the filter 350 . is transmitted to the first PLC control unit 330, the first PLC control unit 330 compares the extracted qc data with one or more data of the raw material mill sheet or the finished product specification sheet to determine whether the parts are good or bad. can

Here, the first PLC control unit 320 may receive one or more data of a raw material mill sheet, a finished product specification sheet, and tool information from the database. The database can be input from an external server or an internal separate storage.

In addition, the metadata generator 330 is a part that generates metadata for an aggregate of the corresponding parts sampled when the part is defective. Here, the index information of the metadata may include each part sampling number (time information, operator, etc.) corresponding to the corresponding qc data, standard data, and tool specifications.

In this way, after the defective part is determined, the metadata generating unit 330 is activated, thereby reducing the data processing cost, and the load processing it is also reduced, thereby lowering the manufacturing cost of the device and consequently the unit price of the produced parts is significantly reduced. can be lowered

The inspection digital board unit 300 performs interfacing between the quality inspection unit 200 and the PC in which the inspection equipment program is installed. That is, the inspection digital board unit 300 may serve as a protocol for interworking the quality inspection unit 200 and a program for inspection equipment having a user interface with each other. Accordingly, metadata including the sampling number, standard data, and index information of the tool specification may be output to the PC.

On the other hand, in the past, there were problems in that an alignment equipment and a quality inspection equipment, which are additionally required for the processing equipment, are required in parallel, which increases the equipment cost, follows a space constraint due to overlapping equipment, and increases the tact time.

Accordingly, in this embodiment, a method of calibrating the processing apparatus 100 using qc data while the calibration equipment is deleted is disclosed.

To this end, the correction digital board unit 400 mainly refers to FIGS. 2, 4 and 6 , based on at least one data of wear information of the tool specification and temperature/humidity information in the device whether or not the tool is worn or not. a second PLC control unit 410 for determining whether the component is thermally deformed; a deformation metadata generating unit 420 for generating deformation metadata by calculating the metadata when the tool wear is less than a set value and not the thermal deformation; and a correction data output unit 430 for generating and outputting a calibration value for finely rotating the displacement of the spindle or the angle of the spindle of the processing apparatus 100 .

The second PLC control unit 410 is a part that determines whether the tool is worn or whether the component is thermally deformed based on one or more data among the temperature/humidity information in the device.

The wear information of the tool may be estimated based on the time information of the sampling number of the metadata. When it is determined that the tool is worn, a notification may be output to an external notification means.

The thermal deformation may be determined by determining whether the temperature is within the design value or the humidity based on the temperature/humidity input from the temperature/humidity sensor installed in the processing apparatus 100 .

The deformation metadata generation unit 420 may generate deformation metadata by calculating the metadata when the wear of the tool is less than a set value and not the thermal deformation.

The deformation metadata may include a sampling number of a corresponding part, a calculated value between the qc data in the standard data, and direction information of the calculated value.

Here, the calculated value between the qc data in the standard data refers to the difference between the qc data in the standard data, and for example, on-axis tolerances such as the x-axis and y-axis, inclination tolerance such as inclination, curvature tolerance, etc. may be included, and the calculated value The direction information of indicates the directionality of each calculated value. For example, 1 indicates a positive direction (low cutting state), 0 indicates a negative direction, and the like can be digitized and tabulated.

The correction data output unit 430 is a part that outputs a calibration value to a control unit (not shown) of the actual CNC machining apparatus 100 . The calibration value is based on the calculated value between the qc data in the standard data, for example, the displacement amount of the spindle (X-axis, Y-axis, Z-axis feed amount), or the angle adjustment of the spindle (X-axis CCW direction rotation amount). can

Through this configuration, the calibration of the processing device 100 can be automatically utilized as correction data using the qc data generated by the quality inspection device without generating data for calibration, so that the equipment cost is lowered, the space utilization is increased, and the The tact time may be reduced, the data processing cost may be reduced, and the load for processing it may be reduced, thereby significantly reducing the manufacturing cost of the part.

Meanwhile, a data bus 600 may be connected between the metadata generator 330 and the modified metadata generator 420 . An input/output controller 610 and a memory 620 may be added to the data bus 600 .

Through the data bus 600 , the load for processing data is also reduced, so that correction data can be quickly output to the control unit of the CNC machining apparatus 100 .

Hereinafter, the quality inspection and calibration process through the integrated quality inspection and calibration module using qc data for CNC machining according to this embodiment will be described in detail with reference to FIGS. 2 to 7 .

First, as shown in FIG. 3 , the quality inspection unit 200 is loaded with parts from the processing apparatus 100 ( S110 ).

Thereafter, the quality inspection unit 200 through the probe probe operation (S120), processing errors, dimensions, outer diameter, inner diameter, inclination, etc. for the supplied parts or processed parts can be extracted (S130). The qc data of the quality inspection unit 200 is basic specification information of the processed part, and this specification information may be output on a separate screen (not shown).

Next, the inspection digital board unit 300 may determine whether the component is good/defective (S210). That is, when the qc data sensed from the input channel shown in FIG. 5 is converted to a digital signal in the AD converter 360 and the signal that has passed through the filter 350 is transmitted to the first PLC controller 330 , the first The PLC control unit 330 may compare the extracted qc data with one or more data of a raw material mill sheet or a finished product specification sheet to determine whether the parts are good or bad. Here, the first PLC control unit 320 may receive one or more data of a raw material mill sheet, a finished product specification sheet, and tool information from the database.

Next, the metadata generating unit 330 generates metadata for an aggregate of the corresponding parts sampled when the part is defective (S220). Here, the index information of the metadata may include each part sampling number (time information, operator, etc.) corresponding to the corresponding qc data, standard data, and tool specifications.

Next, through the data bus 600 of FIG. 7 , the metadata is transferred between the metadata generating unit 330 and the modified metadata generating unit 420 , and at this time, the second PLC controller 410 is shown in FIG. 4 . As shown, based on one or more data among temperature/humidity information in the device, it is determined whether the tool is worn or whether the parts are thermally deformed.

That is, as shown in FIG. 4 , the wear information of the tool may be estimated based on the time information of the sampling number of the metadata. When it is determined that the tool is worn, a notification may be output to an external notification means (S300). In addition, the thermal deformation may be determined based on the temperature/humidity input from the processing apparatus 100 by determining whether the temperature is within the design value or the humidity level (S310). For example, if the temperature/humidity is within the set value, the process may be performed on the premise that no deformation occurs.

Next, the deformation metadata generating unit 420 may generate deformation metadata by calculating the metadata when the tool wear is less than a set value and not the thermal deformation ( S320 ). The deformation metadata may include a sampling number of a corresponding part, a calculated value between the qc data in the standard data, and direction information of the calculated value.

Finally, a calibration value is output through the correction data output unit 430 (S330). The calibration value is based on the calculated value between the qc data in the standard data, for example, the displacement amount (X-axis, Y-axis, Z) of the spindle. axis feed amount), or the angle adjustment of the spindle (X-axis CCW direction rotation amount), etc. may be provided.

Thereafter, the control unit (not shown) of the actual CNC machining apparatus 100 performs a calibration operation based on the calibration value.

Through this step configuration, the calibration of the processing device 100 can be automatically utilized as correction data using the qc data generated by the quality inspection device without generating data for calibration, so that the equipment cost is lowered and the space utilization is increased And the tact time can be reduced, the data processing cost can be reduced, and the load for processing it can also be reduced, so that the manufacturing cost of the part can be significantly lowered.

As mentioned above, although the present invention has been described in detail using preferred embodiments, the scope of the present invention is not limited to specific embodiments and should be construed according to the appended claims. In addition, those skilled in the art will understand that many modifications and variations are possible without departing from the scope of the present invention.

100: processing device 200: quality inspection device
300: inspection digital board unit 310: constant voltage circuit
320: first PLC control unit 330: metadata generation unit
340: communication unit 350: analog filter
360: ADC 370: Input Channel
400: correction digital board unit 410: second PLC control unit
420: correction data output unit 600: data bus
610: input/output controller 620: memory

Claims (6)

LVDT probe probe-type quality inspection unit for extracting qc data including machining error, dimension, outer diameter, inner diameter, and inclination of the machined parts from the machining device;
an inspection digital board unit for determining whether good/defective or not from the extracted qc data and generating metadata including index information in case of processing failure exceeding an allowable tolerance; and
It includes a correction digital board unit that determines the wear of the tool based on the tool specification, determines whether thermal deformation is based on temperature/humidity information in the processing device, generates deformation metadata, and outputs an actual calibration value to the processing device, ,
a data bus provided between the test digital board unit and the corrected digital board unit to transmit the metadata to the corrected digital board unit;
The inspection digital board unit,
a first PLC control unit for determining whether the parts are good/defective based on one or more data of a raw material mill sheet, a finished product specification sheet, and tool information; and
and a metadata generator for generating the metadata when the part is defective;
The index information of the metadata includes each part sampling number, standard data, and tool specification corresponding to the corresponding qc data,
The correction digital board unit,
a second PLC control unit for determining whether a tool is worn or whether a component is thermally deformed based on one or more data among the wear information of the tool specification and the temperature/humidity information in the processing device;
a deformation metadata generating unit generating deformation metadata by calculating the metadata when the tool wear is less than a set value and not the thermal deformation; and
and a correction data output unit for generating and outputting a calibration value for finely rotating the displacement movement of the spindle of the processing device or the angle of the spindle,
The transformation metadata includes a sampling number of the corresponding part, a calculated value between the qc data in the standard data, and direction information of the calculated value. A quality inspection and calibration integration module utilizing qc data for CNC machining.
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