KR20200059359A - Cfrp machining method and device using machining path and machining sequence considering jig arrangement - Google Patents

Abstract

An embodiment of the present invention provides a machining method which may increase machining quality with respect to a machining target by selecting a machining path considering a fixing jig number and a jig separation distance of each machining region to minimize vibration occurring while machining each machining region, shape transformation of a machining region, and a position error of the machining region. According to an embodiment of the present invention, a CFRP machining method using a machining path and a machining sequence considering jig arrangement includes: i) inputting shape data of a machining target to a control unit; ii) controlling positions of a plurality of flexible jigs, respectively; iii) generating position location of the machining target making contact with each flexible jig when the machining target is placed on the flexible jig to transfer the position location of the machining target to the control unit; iv) generating a start machining region and a machining sequence with respect to the machining targets by the control unit according to the input position of the flexible jig, the input position and shape data of the machining target; and v) machining the machining target by a tool.

Description

CFRP processing method and device using processing path and processing sequence considering jig arrangement {CFRP MACHINING METHOD AND DEVICE USING MACHINING PATH AND MACHINING SEQUENCE CONSIDERING JIG ARRANGEMENT}

The present invention relates to a CFRP machining method and apparatus using a machining path and a machining sequence considering a jig arrangement, and more specifically, by selecting a machining path in consideration of a fixed jig number and a jig separation distance of each machining part, respectively It relates to a machining method and apparatus that can improve the machining quality for the object to be processed by minimizing vibrations generated during machining of the machining part, shape deformation of the machining part, and position error of the machining part.

When a machining process is performed on a machining object using a CNC machine tool or a robot, it is necessary to determine a starting point for the machining object and create a machining path. For this, it is common to set a processing origin of a processing object by placing a processing object on a flexible jig and then placing a probe, which is a probe element, on the processing object.

However, when the fixing force of the flexible jig is lower than that of the processing load, there is a problem that the processing precision of the processing object decreases due to insufficient response to the conventional technology as described above for the position change and shape deformation of the processing object during processing.

In the Republic of Korea Registration No. 10-0906726 (invention name: a jig device for setting the position of a workpiece of a machine tool), it is slide-coupled to a bed 110 of a machine tool such as a milling machine to a specific position along the left and right directions of the bed. A horizontal stand 2 that can be selectively fixed; A vertical stand (8) in which a first bolt hole (10) is punched in the left and right direction of the bed as being upright and fixed to the horizontal stand (2); Since the second bolt hole 20 is perforated in the left and right directions of the bed, it can be fixed in surface contact with the vertical stand 8 by the adjusting bolt 18, and the pinhole 22 in the left and right directions of the bed ) Is a perforated extension (16); Disclosed is a jig device for setting a workpiece of a machine tool including an elongated rod-shaped setting pin 24 in which the tip 24a abuts on the side of the workpiece by being inserted into and fixed to the pinhole 22 at an arbitrary length. .

Republic of Korea Registration No. 10-0906726

An object of the present invention for solving the above problems is to separate each processing range in the processing object, and to form a processing path in consideration of the characteristics of each processing range.

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 skilled in the art from the following description. There will be.

The configuration of the present invention for achieving the above object, i) the step of inputting the shape data of the object to be processed into the control unit; ii) controlling the position of each flexible jig among the plurality of flexible jigs; iii) when the object to be processed is seated on the flexible jig, generating positional information of the object to be processed in contact with each of the flexible jigs and transferring them to the control unit; iv) the control unit generating a machining path according to a starting machining site and a machining sequence for the machining object, in preparation for inputted position of the flexible jig and position and shape data of the machining object; And v) a tool performing machining on the object to be processed. In the step iv), the control unit starts from a machining portion where the smallest vibration occurs during machining among the machining portions of the object to be machined. It characterized in that it transmits a control signal to the tool 30 to be processed.

In an embodiment of the present invention, in the step iv), the machining portion where the smallest vibration occurs is the number of fixing jigs and machining portions, which are the number of the flexible jigs surrounding the machining portion, or the distance between each flexible jig and the machining portion. It can be confirmed using the in jig separation distance.

In an embodiment of the present invention, in the step i), in the step of inputting the data of the object to be processed, the data of the object to be processed may be designed by a CAD program.

In an embodiment of the present invention, in step ii), while the processing object is seated on the plurality of flexible jigs, the positions of the X, Y, and Z axes of each flexible jig are coordinated and input to the control unit. can do.

In an embodiment of the present invention, the object to be processed may include at least one of carbon fiber reinforced plastic (CFRP), metal, and synthetic resin having a free-form surface shape.

In an embodiment of the present invention, in step v), the machining process for the object to be processed may include at least one of milling, drilling, trimming, waterjet, and routing.

In an embodiment of the present invention, step iv) may include an error detection step of detecting an error in a machining process by comparing shape data of the object to be processed on coordinates contacted with the flexible jig compared to designed data. .

In an embodiment of the present invention, step iv) may include a deformation amount correction step for correcting a deformation amount of the object to be processed during the processing process.

In an embodiment of the present invention, in the step of correcting the amount of deformation, the processing load and vibration using the flexible jig are measured, and thus the deformation of the object to be processed can be corrected.

Configuration of the present invention for achieving the above object, a tool for performing a processing for the object to be processed; A flexible jig having a variable length to support the seated object and to change the position of the object; A driving unit coupled to a plurality of the flexible jigs and changing the position of each of the flexible jigs; And a control unit for transmitting a control signal to the flexible jig, the driving unit or the tool, and inputting shape data for the processing object, wherein the control unit is the smallest among the processing parts of the processing object. It is characterized in that a control signal is transmitted to the tool so that it is machined from a machining portion where vibration is generated.

The control unit may generate a machining path according to a starting machining site and a machining sequence for the machining object, by comparing the input position of the flexible jig and the position and shape data of the machining object.

Effects of the present invention according to the above configuration, by selecting the machining path in consideration of the fixed jig distance and the jig distance of each machining part, vibration generated during the machining of each machining part, shape deformation of the machining part, machining This is to minimize the position error of the part, and to improve the processing quality for the object to be processed.

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 deduced from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a schematic diagram of a CFRP processing method according to the prior art.
2 is a schematic view of a processing target that is processed using a CFRP processing method according to the prior art.
3 is a schematic diagram of a processing object to be processed using a CFRP processing method 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 implemented in various different forms, and thus is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and like reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part is "connected (connected, contacted, coupled)" with another part, it is not only "directly connected" but also "indirectly connected" with another member in between. "It also includes the case where it is. Also, when a part “includes” a certain component, this means that other components may be further provided instead of excluding other components, unless otherwise stated.

The terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “include” or “have” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and that one or more other features are present. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

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

1 is a schematic diagram of a CFRP processing method according to the prior art, and FIG. 2 is a schematic diagram of a processing target 10 that is processed using the CFRP processing method according to the prior art. Here, Fig. 2 (a) is for the object to be processed 10 prior to processing in the CFRP processing method according to the prior art, Figure 2 (b) is the processing object 10 during processing in the CFRP processing method according to the prior art It is about. As shown in Figure 1, when performing the machining for the object to be processed 10 using the CFRP machining method according to the prior art, while the tool 30 is moving to provide a force to the object 10, Figure 2 As shown in (a), a shape deformation or a position change as illustrated in FIG. 2 (b) may occur in the stationary processing object 10. The present invention may be devised to prevent a reduction in processing precision due to a shape change or a position change of the processing target 10 occurring during processing.

3 is a schematic diagram of a processing target 10 to be processed using a CFRP processing method according to an embodiment of the present invention. Hereinafter, each step of the CFRP processing method of the present invention will be described. Here, the processing object 10, the flexible jig 20, the tool 30, and the driving part 40, the details of the processing object 10 in the CFRP processing method according to the prior art, the flexible jig 20, the tool ( 30) and the driving unit 40 may be the same.

In the first step, shape data of the object to be processed 10 may be input to the control unit. Here, in the step of inputting the data of the object to be processed, the data of the object to be processed may be designed by a CAD program. The object to be processed 10 may include carbon fiber reinforced plastic (CFRP), metal, synthetic resin, and the like having a free-form surface shape. Since the shape data of the object to be processed 10 has a free-form surface shape, the data of the object to be processed may be data designed by 3D programs such as CAD and SolidWorks.

In the second step, the position of each flexible jig 20 among the plurality of flexible jigs 20 may be controlled. Here, in a state where the object to be processed 10 is seated on the plurality of flexible jigs 20, the positions of the X, Y, and Z axes of each flexible jig 20 can be coordinated and input to the control unit.

The processing target 10 for carrying out a predetermined processing process is seated on a plurality of flexible jigs 20, and the flexible jig 20 can stably support the processing target 10. In addition, the flexible jig 20 may be moved to the X and Y axes by the driving unit 40 installed at the lower side of the flexible jig 20, and may be configured to rise or fall in the Z axis. The flexible jig 20 may be formed in a cylindrical shape, but is not limited thereto.

In the third step, when the object to be processed 10 is seated on the flexible jig 20, the position information of the object to be processed 10 in contact with each flexible jig 20 may be generated and transmitted to the control unit. Here, the control unit may transmit a control signal to the tool 30 to be machined from the machining portion where the smallest vibration occurs during machining among the machining portions of the object to be processed 10.

The flexible jig 20 may include a contact sensor that detects a contact state with the processing target 10 on the upper end of the flexible jig 20. The contact sensor may be any one selected from a contact type that directly contacts the object 10 or a non-contact type that senses without touching the object 10, if it can recognize the state of contact with the object 10. It may be a sensor. In addition, another type of sensor may be used according to a method of recognizing or recognizing a measurement position for the object to be processed 10 again.

In the fourth step, the controller prepares the machining path according to the starting machining part and the machining sequence for the machining object 10 by preparing the input position of the flexible jig 20 and the location and shape data of the machining object 10. can do. Here, the smallest vibration is generated, the number of fixed jigs and the number of machining jigs (20) surrounding the machining part and the machining part or the distance between each flexible jig (20) and the machining part using a jig separation distance Can be confirmed. Here, the jig separation distance may be an average value for each distance between each flexible jig 20 and the processing portion.

The control unit analyzes the position and shape of each processing target 10 processing part for processing the processing target 10, and determines the jig separation distance between the number of fixed jigs around each processing part and each flexible jig 20. Can be derived. In addition, the control unit may allow the machining portion having the largest fixed jig number to be processed first, and if the fixed jig number is the same, the machining portion having the smallest jig separation distance may be processed first. Here, the machining portion to be processed with the highest priority may be a starting machining portion, and a path from the starting machining portion to the last machining portion last processed may be the machining path. Since the number of the flexible jigs 20 supporting the processing target 10 is formed to the maximum, even if the number of fixed jigs is larger, the occurrence of machining parts vulnerable to vibration, etc. may not be considered even if the jig separation distance is excessively large. As described above, by selecting the machining path in consideration of the fixed jig number and the jig separation distance of each machining part, the vibration generated during the machining of each machining part, the shape deformation of the machining part, and the positional error of the machining part are minimized. The processing quality of the object 10 can be improved.

Specifically, as shown in FIG. 3, the processing target 10 has two a-processing parts for machining holes, two b-processing parts for straight cutting, two c-processing parts, and four d-processing for curve cutting. Sites may be formed. And, in the comparison of the number of fixing jigs, the number of fixing jigs in the a-processing portion is 4, the number of fixing jigs in the b-processing portion is 3, and the number of fixing jigs in the c-processing portion may be 2. Further, the number of fixing jigs of the d-processing portion may be 1. When the machining path is formed by the above criteria, the processing order may be in the order of a machining part, b machining part, c machining part, and d machining part.

In the object to be processed 10, the processing conditions for each processing part may be different. Here, the machining conditions may be a movement speed of the tool 30, a speed of the tool 30 itself, a processing angle of the tool 30, and the like. Specifically, in the case of machining the a to d machining parts, when the movement speed of the tool 30 processing the machining range b and the speed of the tool 30 itself are used as a reference, the movement of the tool 30 at the a machining part The speed is relatively decelerated and the speed of the tool 30 itself can be relatively accelerated. In addition, the processing conditions for the c-processing part may be the same as the processing conditions for the b-processing part. And, in the d-processing portion, the moving speed of the tool 30 may be relatively decelerated and the speed of the tool 30 itself may be relatively decelerated. This may be because, in the d-processing part, the adjacent b-processing part is in a cut state and the fixed jig number is 1, so it is necessary to minimize vibration during processing.

The fourth step described above may include an error detection step of detecting an error in the machining process by comparing shape data of the object to be processed 10 with the designed data on coordinates contacted with the flexible jig 20. In addition, the fourth step described above may include a deformation amount correction step for correcting the deformation amount of the object 10 to be processed during the processing process. Here, in the deformation amount correction step, the processing load and vibration using the flexible jig 20 are measured, and the deformation of the processing object 10 due to this can be corrected. Specifically, the processing object 10 may be deformed by external force, air pressure, vibration, etc. during the processing process, and as described above, the control unit may determine the location and processing path of the processing object 10 analyzed by the control unit in advance. Continuous real-time comparison with the set shape data of the object 10 to be processed, and when errors such as position error and shape deformation of the object 10 occur, analyze the position error and shape deformation of the object 10 By doing so, the amount of deformation of the object to be processed 10 can be derived. Then, the control unit transmits a control signal for the deformation amount correction to the flexible jig 20, the deformation amount of the object to be processed 10 can be corrected.

In the fifth step, the tool 30 may perform processing on the object 10 to be processed. In addition, the machining process for the object to be processed 10 may include at least one of milling, drilling, trimming, waterjet, and routing.

Hereinafter, the CFRP processing apparatus of the present invention will be described. CFRP processing apparatus of the present invention, the tool 30 for performing the processing of the object (10); A flexible jig 20 having a variable length in order to seat and support the processing target 10 and change the position of the processing target 10; A driving unit 40 coupled to a plurality of flexible jigs 20 and changing the position of each flexible jig 20; And a control unit that transmits a control signal to the flexible jig 20, the driving unit 40, or the tool 30, and inputs shape data for the object 10 to be processed. In addition, the control unit may transmit a control signal to the tool 30 to be machined from the machining portion where the smallest vibration occurs during machining among the machining portions of the object to be processed 10. Here, the control unit can generate the machining path according to the starting machining site and the machining sequence for the machining object 10, in preparation for the position of the input flexible jig 20 and the location and shape data of the machining object 10. have.

The cutting process system including the CFRP processing apparatus of the present invention as described above can be constructed.

The above description of the present invention is for illustration only, and those skilled in the art to which the present invention pertains can understand that the present invention 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 distributed manner, and similarly, 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 modifications or variations derived from the meaning and scope of the claims and their equivalent concepts should be interpreted to be included in the scope of the present invention.

10: processing target
20: flexible jig
30: tool
40: drive unit

Claims (12)

i) inputting the shape data of the object to be processed into the control unit;
ii) controlling the position of each flexible jig among the plurality of flexible jigs;
iii) when the object to be processed is seated on the flexible jig, generating positional information of the object to be processed in contact with each of the flexible jigs and transferring them to the control unit;
iv) the control unit generating a machining path according to a starting machining site and a machining sequence for the machining object in preparation for the inputted position of the flexible jig and the position and shape data of the machining object; And
v) the tool comprises the steps of performing the processing on the object;
In step iv), the control unit transmits a control signal to the tool so as to be machined from a machining part generating the smallest vibration during machining of each machining part of the object to be processed. CFRP processing method using and processing sequence.
The method according to claim 1,
In the step iv), the machining part generating the smallest vibration is determined by using a fixed jig number and a machining part that is the number of the flexible jigs surrounding the machining part or a jig separation distance that is a distance between each flexible jig and a machining part. CFRP machining method using the machining path and the machining sequence considering the jig arrangement, characterized in that.
The method according to claim 1,
In the step i), in the step of inputting the data of the object to be processed, the data of the object to be processed is designed by a CAD (CAD) program, a CFRP machining method using a machining path and a machining sequence considering a jig arrangement.
The method according to claim 1,
In step ii), the jig arrangement characterized in that the coordinates of the positions of the X, Y, and Z axes of each of the flexible jigs are coordinated and input to the control unit while the object to be processed is seated on the plurality of flexible jigs. CFRP machining method using the considered machining path and machining sequence.
The method according to claim 1,
The object to be processed is a CFRP processing method using a processing path and a processing sequence considering a jig arrangement, characterized in that it comprises at least one of a free-form carbon fiber reinforced plastic (CFRP), metal, and synthetic resin.
The method according to claim 1,
In the step v), the machining process for the object to be processed includes a milling, drilling, trimming, waterjet, routing, CFRP machining method using a machining path and machining sequence considering the jig arrangement.
The method according to claim 1,
The step iv) includes an error detection step of detecting an error in a machining process by comparing shape data of the object to be processed on the coordinates contacted with the flexible jig, compared to the designed data. CFRP processing method using and processing sequence.
The method according to claim 1,
The step iv), a CFRP processing method using a machining path and a processing sequence considering a jig arrangement, comprising a deformation amount correction step of correcting a deformation amount of the object to be processed during the processing process.
The method according to claim 8,
In the step of correcting the amount of deformation, the machining load and vibration using the flexible jig are measured, and the CFRP machining method using the machining path and the machining sequence in consideration of the jig arrangement is characterized in that the deformation of the object to be processed is corrected.
A tool that performs processing on a processing target;
A flexible jig having a variable length to support the seated object and to change the position of the object;
A driving unit coupled to a plurality of the flexible jigs and changing the position of each of the flexible jigs; And
The flexible jig, a control unit for transmitting a control signal to the drive unit or the tool, and a control unit for inputting the shape data for the processing object; including, the control unit, the smallest vibration during processing of each processing part of the processing object CFRP processing apparatus using a machining path and a machining sequence in consideration of the jig arrangement, characterized in that a control signal is transmitted to the tool so that it is machined from the generated machining part.
The method according to claim 11,
The control unit, considering the input position of the flexible jig and the position and shape data of the object to be processed, processing considering the arrangement of the jig, characterized in that for generating a machining path according to the starting machining site and the machining sequence for the object to be processed CFRP processing device using path and processing sequence.
A cutting process system comprising a CFRP processing apparatus using a processing path and a processing sequence in consideration of a jig arrangement according to any one of claims 10 or 11.

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