KR20220022488A - Fixing device using sensor array and processing method using same - Google Patents

Abstract

The present invention relates to a device for fixing a workpiece using a sensor array and a processing control method using the same, and more specifically to the device for fixing a workpiece using a sensor array and the processing control method using the same for maintaining excellent processing quality. The configuration of the present invention for achieving the above object provides the device for fixing a workpiece using a sensor array, comprising: a jig part provided in plurality at a lower part of a workpiece and provided to support the workpiece; a sensor part provided in the jig part and provided to measure a signal of a part supporting the workpiece of the jig part; and a control part receiving a signal from the sensor part, and provided to determine whether the abnormality of a processing part and the jig part when detecting an abnormal signal.

Description

A device for fixing a workpiece using a sensor array and a processing control method using the same {FIXING DEVICE USING SENSOR ARRAY AND PROCESSING METHOD USING SAME}

The present invention relates to an apparatus for fixing a workpiece using a sensor array and a processing control method using the same, and more particularly, to an apparatus for fixing a workpiece using a sensor array for maintaining excellent processing quality and a processing control method using the same.

Carbon Fiber Reinforced Plastics (CFRP) is attracting attention as a lightweight structural material with high strength and elasticity in the fields of aviation, automobiles, and ships, and its usage is also gradually increasing.

Carbon fiber composite material (CFRP) has excellent properties as a lightweight structural material. For example, the specific strength (比强度) is 6 times that of steel, 2 times that of Glass Fiber Reinforced Plastics (GFRP), the specific modulus (比彈性率) is 3 times that of steel, and the static It has excellent fatigue characteristics as well as strength, and has excellent friction and abrasion resistance. In addition, functionally, since the coefficient of thermal expansion is small, it is excellent in dimensional stability, and has excellent performance in electrical conductivity, corrosion resistance, vibration damping property, X-ray transmittance, and the like.

Various types of structures are required in the fields of aviation, ships, and automobiles, as well as such carbon fiber composites, and accordingly, various jigs for supporting the structure at a predetermined height from the ground are provided in order to promote the convenience of work. In particular, when processing a curved structure forming a curved surface, a plurality of jigs for stably supporting the structure corresponding to the curved surface are provided. Specifically, in the case of a curved structure, a process error is highly likely to occur because it is broken away from the jig by gravity or processing force, or a precise process is not performed. And, when the processing is performed, if the jig does not exist at the lower side of the processing position, there may be a problem in that the curved structure is deformed due to the processing force. Therefore, a plurality of jigs were provided on the lower side of the curved structure to fix and support the curved structure.

However, the machining quality and tool life vary depending on the machining path and the position of the jig. In the prior art, since it is difficult to quickly find out these situations, there is a problem in that the machining quality is deteriorated because the replacement time of the jig and the tool is missed.

Korean Patent Publication No. 0215108 (May 21, 1999)

An object of the present invention for solving the above problems is to provide an apparatus for fixing a workpiece using a sensor array for maintaining excellent processing quality and a processing control method using the same.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

The configuration of the present invention for achieving the above object is provided in plurality at the lower portion of the work, the jig portion provided to support the work; a sensor unit provided in the jig unit and provided to measure a signal of a portion supporting the workpiece of the jig unit; and a control unit provided to receive a signal from the sensor unit and determine whether an abnormality is detected in the processing unit and the jig unit when detecting an abnormal signal.

In an embodiment of the present invention, the sensor unit may include sensors that measure signals for acceleration and displacement of a portion supporting the workpiece of the jig unit.

In an embodiment of the present invention, the control unit derives the processing position of the processing unit according to the processing path and elapsed time of the processing unit, detects an abnormal signal from the signal provided from the sensor unit, and the processing unit and the jig It may be characterized in that it is provided to determine whether the negative is abnormal.

In an embodiment of the present invention, the jig portion, the first body unit extending in the vertical direction; a second body unit coupled to the inner side of the first body unit and provided to extend upwardly; a fixing unit provided on an upper side of the second body unit and provided to support a lower surface of the workpiece; and a connection unit connecting the second body unit and the fixing unit.

In an embodiment of the present invention, the connection unit may be characterized in that the fixing unit is provided to be rotatable in response to the shape of the workpiece.

The configuration of the present invention for achieving the above object is a processing control method using a workpiece fixing device using a sensor array, comprising: a) moving the processing unit along a preset processing path and processing the workpiece; b) when the workpiece is processed, the sensor unit measuring a signal from the jig unit; c) receiving, by the control unit, the measured signal; And d) the control unit provides a processing control method using a workpiece fixing device using a sensor array, characterized in that it comprises the step of providing to determine whether the abnormality of the processing unit and the jig unit when detecting an abnormal signal in the signal provided. .

In an embodiment of the present invention, in step b), the sensor unit may be configured to measure signals for acceleration and displacement of a portion supporting the workpiece of the jig unit.

In an embodiment of the present invention, the step d) includes: d1) detecting an abnormal signal from the received signal; d2) deriving a machining position when the abnormal signal is generated according to the machining path of the machining part and the elapsed time from the machining start time; and d3) determining whether the processing unit and the jig unit are abnormal using the signal.

In an embodiment of the present invention, in the step d3), when an abnormal signal is measured only in the sensor unit provided in any one of the plurality of jig units, the jig unit provided with the sensor unit in which the abnormal signal is measured is replaced. It may be characterized in that it is provided to determine the.

In an embodiment of the present invention, when the magnitude of error occurrence exceeds a preset reference value by deriving the vibration direction and size of the jig part through the displacement measured from the sensor part, it may be characterized in that it is provided to replace the jig part there is.

In an embodiment of the present invention, in step d3), when an abnormal signal is measured from all of the sensor units provided in the plurality of jig units, it may be characterized in that it is determined that an abnormality has occurred in the processing unit. .

According to the effect of the present invention according to the above configuration, it is possible to quickly determine whether the jig unit and the processing unit are defective.

By promptly determining whether the jig part and the processing part are defective and replacing or changing the processing conditions, processing quality can be improved.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is an exemplary view of a workpiece fixing device using a sensor array according to an embodiment of the present invention.
2 is a flowchart of a processing control method using a workpiece fixing device using a sensor array according to an embodiment of the present invention.
3 is an exemplary view showing a processing path of the processing unit according to an embodiment of the present invention.
4 is a flowchart of steps provided for determining whether the processing unit and the jig unit are abnormal when the control unit detects an abnormal signal from the received signal according to an embodiment of the present invention.
4 is an exemplary view showing a processing path of the processing unit according to an embodiment of the present invention.
5 is a graph showing an abnormal timing of the processing unit through a signal according to an embodiment of the present invention.
6 is a graph showing a point of occurrence of a defect through a signal according to an embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be “connected (connected, contacted, coupled)” with another part, it is not only “directly connected” but also “indirectly connected” with another member interposed therebetween. "Including cases where In addition, when a part "includes" a certain component, this means that other components may be further provided without excluding other components unless otherwise stated.

The terminology used herein is used only to describe specific embodiments, and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary view of a workpiece fixing device using a sensor array according to an embodiment of the present invention.

As shown in FIG. 1 , the workpiece fixing device 100 using a sensor array includes a jig unit 110 , a sensor unit 120 , and a control unit 130 .

The jig part 110 is provided in plurality under the workpiece 10, and may be provided to support the workpiece.

The jig unit 110 includes a first body unit 111 , a second body unit 112 , a fixing unit 113 , and a connection unit 114 .

The first body unit 111 may be provided at a lower portion of the workpiece 10 and extend in the vertical direction.

The second body unit 112 may be coupled to the inner side of the first body unit 111 and may be provided to extend upwardly. For example, the second body unit 112 may be provided in the form of a multi-stage boom with the first body unit 111 , or may be provided in a foldable manner. Accordingly, the jig part 110 can support the workpiece 10 corresponding to the height of the workpiece 10 by adjusting the extension length of the second body unit 112 .

Here, the workpiece 10 may refer to a processing target including a carbon fiber composite (CFRP). The carbon fiber composite material of the present invention is CFRP (Carbon Fiber Reinforced plastic), GFRP (Glass Fiber Reinforced Plastic), DFRP (Dyneema Fiber Reinforced Plastics), ZFRP (Zylon Fiber Reinforced Plastics), BFRP (Boron Fiber Reinforced Plastics), KFRP ( Kevlar Fiber Reinforced Plastics) and CFRM (Carbon Fiber Reinforced Metal) may be used to include all composite materials.

In addition, the workpiece 10 is not limited thereto, and may include all of a thin metal plate, a plate in which a carbon fiber composite material and a metal are laminated.

The fixing unit 113 is provided on the upper side of the second body unit 112, and has a substantially trapezoidal cross-sectional shape when viewed from the front. The fixing unit 113 may be in contact with the workpiece 10 to support the lower surface of the workpiece 10 . At this time, the fixing unit 113 passes through the processing part Drk for performing hole processing on the workpiece 10 to prevent damage to the fixing unit 113. A predetermined distance from the center of the fixing unit 113 may be provided in a hollow shape. That is, the longitudinal cross-section of the fixing unit 113 may have a trapezoidal shape with an open upper side. For example, the fixing unit 113 may be provided in a substantially bell shape. In addition, the fixing unit 113 may be made of a material capable of preventing deformation of the workpiece 10 due to a processing force generated on the processing portion.

The connection unit 114 may be provided above the second body unit 112 to connect the second body unit 112 and the fixing unit 113 . In this case, the connection unit 114 may be provided rotatably so that the fixing unit 113 corresponds to the shape of the workpiece 10 . That is, the fixing unit 113 is freely angled from the upper side of the second body unit 112 in the front, back, left and right directions by the connection unit 114 , in a state corresponding to the shape of the workpiece 10 . It is possible to support To this end, the connection unit 114 may be provided as a ball joint. However, the connection unit 114 is not limited to a ball joint.

The sensor unit 120 may be provided in each of the plurality of jig units 110 , and may be provided to measure a signal of a portion of the jig unit 110 supporting the workpiece 10 . That is, the sensor unit 120 may be provided to measure the signal of the fixing unit 1130 .

In addition, the sensor unit 120 may include sensors that measure signals for acceleration and displacement of a portion of the jig unit 110 supporting the workpiece 10 .

For example, the sensor unit 120 may include an acceleration sensor, a displacement sensor, a strain gauge, and the like, and the type of sensor is not limited thereto.

The control unit 130 may be provided to receive a signal from the sensor unit 120 , and to determine whether the processing unit 110 and the jig unit 120 are abnormal when detecting an abnormal signal.

Specifically, the control unit 130 may be provided to derive the processing position of the processing unit (D) according to the processing path and elapsed time of the processing unit (D).

In addition, the control unit 130 may be provided to detect an abnormal signal from the signal provided from the sensor unit 120 to determine whether the processing unit D and the jig unit 120 are abnormal.

Hereinafter, a processing control method using a workpiece fixing device using a sensor array will be described in detail.

2 is a flowchart of a processing control method using a workpiece fixing device using a sensor array according to an embodiment of the present invention.

As shown in Figure 2, the processing control method using the workpiece fixing device using the sensor array, first, the processing unit may perform the step (S10) of processing the workpiece while moving along a preset processing path.

3 is an exemplary view showing a processing path of the processing unit according to an embodiment of the present invention.

As shown in FIG. 3 , in the step (S10) of processing the workpiece while the processing part moves along a preset processing path, the processing part D processes the workpiece 10 while moving along the preset processing path. can be provided.

That is, the machining portion D may be provided to form machining holes 11 while moving along a preset machining path.

After the step (S10) of processing the workpiece while the processing unit moves along a preset processing path, when the workpiece is processed, a step (S20) of the sensor unit measuring a signal from the jig unit may be performed.

When the workpiece is processed, in the step (S20) of the sensor unit measuring a signal from the jig unit, the sensor unit 120 measures the signal for acceleration and displacement of the part supporting the work piece of the jig unit 110 may be arranged to do so.

Specifically, when the machining portion D forms the machining hole 11 and performs machining, vibration is generated in the jig portion 110 . At this time, the sensor unit 120 may be provided to measure signals for acceleration and displacement of the jig unit 110 .

When the workpiece is processed, after the sensor unit measures the signal from the jig unit (S20), the control unit may perform the step (S30) of receiving the measured signal.

In the step (S30) of the control unit receiving the measured signal, the control unit 130 receives the measured signal from the sensor unit 120 coupled to each of the jig units 110 to receive the jig unit 110. It may be arranged to analyze the signal separately.

After the control unit receives the measured signal (S30), when the control unit detects an abnormal signal from the received signal, a step (S40) provided to determine whether the processing unit and the jig unit are abnormal may be performed.

4 is a flowchart of steps provided for determining whether the processing unit and the jig unit are abnormal when the control unit detects an abnormal signal from the received signal according to an embodiment of the present invention.

4 , when the control unit detects an abnormal signal in the received signal, the step S40 is provided to determine whether the processing unit and the jig unit are abnormal, first, detecting an abnormal signal in the received signal (S41) ) can be done.

5 is a graph showing an abnormal time point of the processing unit through a signal according to an embodiment of the present invention, and FIG. 6 is a graph showing a defect occurrence point through a signal according to an embodiment of the present invention.

5 and 6 , in the step of detecting an abnormal signal from the received signal ( S41 ), the controller 130 controls an abnormal signal in which a non-uniform peak occurs in the signal received from the sensor unit 120 . It may be provided to detect.

After the step (S41) of detecting the abnormal signal from the received signal, the step (S42) of deriving the machining position when the abnormal signal is generated according to the processing path of the processing unit and the elapsed time from the processing start time (S42) may be performed.

The machining part D is provided to perform machining while moving along a preset machining path. Therefore, the control unit 130 may be provided to derive the machining position at which the machining unit (D) is located through the elapsed time from the start time of machining.

After the step (S42) of deriving the machining position when an abnormal signal is generated according to the machining path of the machining section and the elapsed time from the machining start time (S42), the step (S43) of determining whether the machining section and the jig section are abnormal using the signal is performed. can

In the step S43 of determining whether the processing unit and the jig unit are abnormal using the signal, the abnormal signal is measured only in the sensor unit 120 provided in any one of the plurality of jig units 110 . In this case, it may be provided to determine whether or not to replace the jig unit 110 provided with the sensor unit 120 for which the abnormal signal is measured.

As an example, as shown in FIG. 3, the signal of the sensor unit of the workpiece fixing device 100a using the first sensor array, the signal of the sensor unit of the workpiece fixing device 100b using the second sensor array, the third sensor array using The signal of the sensor part of the workpiece fixing device 100c is uniform, but when the signal of the sensor part of the workpiece fixing device 100d using the fourth sensor array is non-uniform, the fourth sensor array using the workpiece fixing device 100d (100d) It may be provided to determine whether to replace.

In addition, when the vibration direction and size of the jig unit 110 are derived through the displacement measured from the sensor unit 120 and the error occurrence size exceeds a preset reference value, the jig unit 110 is provided to be replaced. can be

On the other hand, when the derived error generation size does not exceed a preset reference value, it may be provided to change the position or processing conditions of the jig unit 110 .

In addition, when an abnormal signal is simultaneously measured from all of the sensor units 120 provided in the plurality of the jig units 110 , it may be determined that an abnormality has occurred in the processing unit D.

In addition, the control unit 130 may be provided to further determine in which layer of the workpiece 10 the processing abnormality occurred according to the vibration direction and magnitude during hole processing of the jig unit 110 .

Specifically, the workpiece 10 may be provided in a structure in which a plurality of materials are stacked. For example, the workpiece 10 may be formed by laminating a carbon fiber composite on a metal layer. In this case, the vibration generated when the processing part (D) performs hole processing, when it passes through the metal layer and when it passes through the carbon fiber composite material may be different. That is, the acceleration and displacement of the jig unit 110 measured by the sensor unit 120 may vary.

Accordingly, the control unit 130 may be provided to subdivide and recognize a signal generated during processing of one hole for each layer, determine whether there is an abnormality in the processing state for each layer, and adjust the processing conditions if necessary.

The present invention prepared as described above can improve processing quality by quickly determining whether the jig part and the processing part are defective and replacing or changing the processing conditions.

The description of the present invention described above is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

100: Workpiece fixing device using a sensor array
110: jig unit
111: first body unit
112: second body unit
113: fixed unit
114: connection unit
120: sensor unit
130: control unit
100a: a workpiece fixing device using the first sensor array
100b: Fixing the workpiece using the second sensor array
100c: Fixing device using the third sensor array
100d: Workpiece fixing device using the fourth sensor array

Claims (11)

A jig portion provided in plurality at the lower portion of the workpiece and provided to support the workpiece;
a sensor unit provided in the jig unit and provided to measure a signal of a portion supporting the workpiece of the jig unit; and
Receives a signal from the sensor unit, and a processing unit and a jig unit when detecting an abnormal signal, characterized in that it comprises a control unit provided to determine the abnormality of the processing unit using a sensor array.
The method of claim 1,
The sensor unit,
A workpiece fixing device using a sensor array, characterized in that the jig part consists of sensors for measuring signals for acceleration and displacement of a part supporting the workpiece.
The method of claim 1,
The control unit is
A sensor characterized in that it is provided to derive the machining position of the machining section according to the machining path and elapsed time of the machining section, and to detect an abnormal signal from the signal provided from the sensor section to determine whether the machining section and the jig section are abnormal. Workpiece holding device using an array.
The method of claim 1,
The jig unit,
a first body unit extending in the vertical direction;
a second body unit coupled to the inner side of the first body unit and provided to extend upwardly;
a fixing unit provided on an upper side of the second body unit and provided to support a lower surface of the workpiece; and
A workpiece fixing device using a sensor array, characterized in that it comprises a connection unit for connecting the second body unit and the fixing unit.
5. The method of claim 4,
The connection unit is
A workpiece fixing device using a sensor array, characterized in that the fixing unit is provided to be rotatable in response to the shape of the workpiece.
In the processing control method using the workpiece fixing device using the sensor array according to claim 1,
a) processing the workpiece while the processing unit moves along a preset processing path;
b) when the workpiece is processed, the sensor unit measuring a signal from the jig unit;
c) receiving, by the control unit, the measured signal; and
d) The processing control method using a workpiece fixing device using a sensor array, characterized in that it comprises the step of being provided to determine whether the processing unit and the jig unit abnormal when detecting an abnormal signal in the signal provided by the control unit.
7. The method of claim 6,
In step b),
The sensor unit processing control method using a workpiece fixing device using a sensor array, characterized in that provided to measure the signal for the acceleration and displacement of the part supporting the workpiece of the jig part.
7. The method of claim 6,
Step d) is,
d1) detecting an abnormal signal from the received signal;
d2) deriving a machining position when the abnormal signal is generated according to the machining path of the machining part and the elapsed time from the machining start time; and
d3) Using the signal, the processing control method using a workpiece fixing device using a sensor array, characterized in that it comprises the step of determining whether the abnormality of the processing unit and the jig unit.
9. The method of claim 8,
In step d3),
Fixing a workpiece using a sensor array, characterized in that when an abnormal signal is measured only in the sensor unit provided in any one of the plurality of jig units, the sensor unit for which the abnormal signal is measured is provided to determine whether to replace the jig unit Process control method using equipment.
10. The method of claim 9,
By deriving the vibration direction and size of the jig part through the displacement measured from the sensor part, when the error occurrence size exceeds a preset reference value, the workpiece fixing device using a sensor array, characterized in that it is provided to replace the jig part Process control method.
9. The method of claim 8,
In step d3),
Processing control method using a workpiece fixing device using a sensor array, characterized in that provided to determine that an abnormality has occurred in the processing unit when an abnormal signal is measured in the entire sensor unit provided in the plurality of jig units.

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