KR20190074230A - Large pulsed electron beam based deburring method and apparatus of carbon fiber-reinforced plastics - Google Patents

Abstract

The present invention relates to a large pulsed electron beam based deburring method of a carbon fiber reinforced plastic (CFRP) and an apparatus thereof, which can improve the quality of a hole and improve the service life of a CFRP composite material. The deburring method of the present invention comprises the steps of: setting a parameter for irradiating an electron beam; and irradiating the electron beam to a burr formed in a drilled hole of the carbon fiber reinforced plastic composite material, according to the set parameter.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a carbon fiber reinforced plastic (CFRP)

The present invention relates to a deburring method and apparatus, and more particularly to a large pulsed electron beam (LPEB) based deburring method and apparatus for carbon fiber-reinforced plastics (CFRP).

Many types of carbon fiber reinforced plastic (CFRP) and metal alloys have been developed with the increasing demand for lightweight materials in industries that require rugged structural materials such as aerospace, automotive and naval.

These materials have excellent mechanical properties including improved strength to weight ratio, impact resistance and tensile strength. CFRP has superior mechanical properties than conventional metal alloys, but industrial applications are limited because they are difficult to use in machining.

Drilling is a widely used process for producing products in CFRP. There are some problems when machining CFRP, the most important being delamination and burr occurrence. Previous work on drilling in CFRP sought to minimize these deficiencies. However, there is a problem in that it is impossible to completely prevent peeling and burrs at the outlet side of the hole by controlling the processing parameters and the tool shape.

[Patent Document 1] Korean Patent No. 10-1036879

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for deburring based on a large pulsed electron beam (LPEB) of carbon fiber-reinforced plastics (CFRP) .

The present invention also aims to irradiate LPEB to remove burrs created in the drilled holes of the CFRP composite.

Further, the present invention aims to irradiate the LPEB by setting the acceleration voltage, the solenoid voltage and the number of pulses.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description.

According to an aspect of the present invention, there is provided a deburring method comprising: setting a parameter for irradiating an electron beam; And irradiating the electron beam to a burr formed in a drilled hole of a carbon fiber-reinforced plastic composite material, according to the set parameters.

In an embodiment, the step of setting the parameter may comprise setting at least one of an acceleration voltage, a solenoid voltage and a number of pulses for the electron beam.

In an embodiment, the step of irradiating the electron beam comprises repeatedly irradiating the electron beam to a burr produced in a drilled hole of the carbon fiber-reinforced plastic composite material, in accordance with the number of pulses Step.

In an embodiment, the number of pulses may be greater than or equal to 30.

In an embodiment, a metal mask is formed on the carbon fiber-reinforced plastic composite material, and the metal mask may be drilled with holes having the same diameter as the drilled holes of the carbon fiber-reinforced plastic composite material .

In an embodiment, the deburring device comprises: a control unit for setting a parameter for irradiating an electron beam; And an electron gun for irradiating the electron beam to a burr formed in the drilled hole of the carbon fiber-reinforced plastic composite material according to the set parameters.

In an embodiment, the control unit may set at least one of an acceleration voltage, a solenoid voltage, and a number of pulses for the electron beam.

In an embodiment, the electron gun may repeatedly irradiate the electron beam to a burr created in a drilled hole of the carbon fiber-reinforced plastic composite material, depending on the number of pulses.

In an embodiment, the number of pulses may be greater than or equal to 30.

In an embodiment, a metal mask is formed on the carbon fiber-reinforced plastic composite material, and the metal mask may be drilled with holes having the same diameter as the drilled holes of the carbon fiber-reinforced plastic composite material .

The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Quot; a "general inventor") to fully disclose the scope of the invention.

According to one embodiment of the present invention, the LPEB is irradiated according to the acceleration voltage, the solenoid voltage and the number of pulses to remove the burr generated in the drilled hole of the CFRP composite, thereby improving the quality of the hole, The life can be improved.

The effects of the present invention are not limited to the effects described above, and the potential effects expected by the technical features of the present invention can be clearly understood from the following description.

1 shows a drilling apparatus for a CFRP composite according to an embodiment of the present invention.
Figure 2 shows an optical image of a burr created in a drilled hole in accordance with an embodiment of the present invention.
3 illustrates an LPEB-based deburring apparatus according to an embodiment of the present invention.
4 illustrates an example of a process for deburring a CFRP composite using LPEB irradiation according to an embodiment of the present invention.
5 shows an optical image of a burr before and after LPEB irradiation according to an embodiment of the present invention.
FIGS. 6 (a) to 6 (c) show a burr size graph when the LPEB irradiation parameters are independently varied according to an embodiment of the present invention.
Figure 7 shows an example of the calculation of the dimensional accuracy of a hole according to an embodiment of the present invention.
FIG. 8 shows an example of a 3D geometric image before and after LPEB irradiation according to an embodiment of the present invention.
9 (a) to 9 (c) show the diameter deviation after the LPEB irradiation with respect to the acceleration voltage Va, the solenoid voltage Vs and the number of pulses according to the embodiment of the present invention.
10 illustrates an operation method of an LPEB-based deburring apparatus according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

Various features of the invention disclosed in the claims may be better understood in view of the drawings and detailed description. The devices, methods, processes and various embodiments disclosed in the specification are provided for illustration. The disclosed structural and functional features are intended to enable a person skilled in the art to practice various embodiments and are not intended to limit the scope of the invention. The terms and phrases disclosed are intended to facilitate understanding of the various features of the disclosed invention and are not intended to limit the scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, a large pulsed electron beam (LPEB) based deburring method and apparatus of carbon fiber-reinforced plastics (CFRP) according to an embodiment of the present invention will be described.

1 illustrates a drilling apparatus 100 for a CFRP composite according to an embodiment of the present invention.

Referring to FIG. 1, the drilling apparatus 100 may include a drill bit 110 and a covering fixture 120.

The drill bit 110 may drill a CFRP composite secured by the lid securing portion 120. For example, the drill bit 110 may have a diameter of 9 mm. In one embodiment, the CFRP composite material may comprise a unidirectional CFRP composite.

Drilling parameters, including feed rate, cutting speed, diameter and rotation frequency, as well as material properties such as fiber orientation, fiber length and resin properties, can affect hole quality in CFRP. By adjusting the drilling parameters, the drilling force and hole quality can be changed. The drilling parameters may be closely related to defects found in drilled holes.

Burrs can be created in the drilled holes of the CFRP composite through a drilling process according to the drilling parameters. Burrs can be created by fibers that have not been removed during the drilling process. In this case, referring to FIG. 2, since the CFRP composite is unidirectional, the burrs generated in the holes through the drilling process can be distributed symmetrically. For example, the burr may have a relatively high aspect ratio, an average length of 5.09 mm and a width of 0.4 mm.

In addition, when the CFRP composite layer is separated and the bending stress exceeds the bending strength limit, the CFRP composite layer is broken due to the uncut fiber, and the CFRP composite layer is peeled from the exit side of the hole May occur.

Since CFRP composites have specific orientations, the fibers in the stack of CFRP composites can be aligned unidirectionally. The fibers which are oriented in the drill rotation direction by using the drill bit 110 can not be removed. After the drill has penetrated into the hole, the fibers at the hole entrance can be removed by the remainder of the drill bit 110, but the burr at the exit of the hole may not be removed.

The biggest problem associated with the quality of drilled holes may be due to delamination and burr occurrence. Burr removal can therefore improve the quality of drilling by increasing dimensional accuracy.

FIG. 3 illustrates an LPEB-based deburring device 300 in accordance with an embodiment of the present invention.

Referring to FIG. 3, LPEB can be irradiated to remove burrs because burrs are created in drilled holes as the CFRP composite material is drilled. The LPEB can transfer energy to the substrate through a plasma electron beam, which is an accelerated electron beam in a plasma gas. In one embodiment, the LPEB can induce a resolidification layer by rapidly melting and resolidifying the material. The resolidification layer is known to have changed its mechanical and chemical properties.

The LPEB-based deburring device 300 may include an electron gun 320 and a moving stage 330 housed in a vacuum chamber 310.

The electron gun 320 may irradiate the LPEB according to an acceleration voltage Va, a solenoid voltage Vs, and a number of pulses. That is, the three LPEB irradiance parameters that affect the total amount of energy delivered to the substrate containing the CFRP composite material subjected to the drilling process during LPEB irradiation are the acceleration voltage (Va), the solenoid voltage (Vs) May include numbers.

The cathode of the electron gun 320 can ionize the inert gas using accelerating electrons. The ionized inert gas may refer to a plasma. For example, the inert gas may include argon. The pressure can be set to 0.05 Pa.

During LPEB irradiation, the high kinetic energy of the accelerating electrons can be converted to thermal energy. High temperatures induced by LPEB irradiation can generally melt or vaporize the target material. Also, because the electron beam can destroy the carbon-carbon bond, a relatively low energy electron beam can be used to crosslink the polymer.

However, the energy density of the LPEB is higher than the energy density of the electron beam used in the polymer cross-linking. This may mean that repeated irradiation can destroy, destroy and separate the carbon-carbon bond. Since the burrs of the CFRP composite are mainly composed of carbon fibers, they can be effectively removed by LPEB irradiation.

A controller (not shown) of the LPEB-based deburring apparatus 300 can control the energy density of the LPEB by adjusting the acceleration voltage Va and the solenoid voltage Vs. For example, in order to obtain the energy density in the range of 5 to 10 J / cm2, the acceleration voltage Va may be adjusted to 20 to 30 keV and the solenoid voltage Vs may be adjusted to 1.0 to 1.5 keV.

The LPEB irradiance parameter can also affect the quality of the hole surface. The solenoid voltage Vs can cause accelerating electrons to travel from the cathode to the surface of the substrate along a spiral path. The helical path induced by the Lorentz force can illuminate the vertical plane of the hole without tilting the electron gun 310 or the moving stage 320.

Since the radius of the helical path is inversely proportional to the solenoid voltage Vs, increasing the solenoid voltage Vs allows the accelerating electrons to penetrate deeper into the hole by reducing collision with the side.

The electron gun 320 irradiates the LPEB with a very short pulse with a duration of 2 mu s so that a number of 10-30 pulses may be used to deliver sufficient energy to remove the burr. The irradiation frequency of the LPEB may be 0.1 Hz.

The moving stage 330 can horizontally move the position of the CFRP composite so that the LPEB can focus on the center of the drilled hole of the CFRP composite. Thus, the LPEB can be uniformly irradiated onto the entire surface and edge of each drilled hole. For example, the effective radius of the LPEB, including 85% or more of the energy density, may be 20 mm.

CFRP composites can be composed of two materials: carbon fiber and resin. Carbon fibers and resins have completely different properties and can be affected differently by LPEB irradiation. However, it is necessary to avoid evaporation of the polymer resin and damage of the carbon fibers on the surface of the CFRP composite.

Since the energy of LPEB is higher than the bond energy of carbon fiber and resin contained in the CFRP composite, carbon fiber and resin may be damaged when LPEB is irradiated. Thus, a metal mask may be deposited over the CFRP composite to protect the CFRP composite material other than the burr.

In this case, the metal mask may be cut to the same diameter (e.g., 9 mm) as the hole drilled by the fiber laser. Thereafter, the metal mask may be secured onto the CFRP composite material drilled prior to LPEB irradiation. For example, the metal mask may include an aluminum mask. This prevents damages of the CFRP composite during LPEB irradiation, and only the micro-cut fibers or burrs can be removed.

4 illustrates an example of a process for deburring a CFRP composite using LPEB irradiation according to an embodiment of the present invention.

Referring to FIG. 4, an LPEB irradiation process may be used to deburr drilled holes of a CFRP composite. The size and structure of the burrs of the fiber before and after LPEB irradiation can be measured.

The LPEB-based deburring process according to one embodiment of the present invention has three main parameters that affect energy transfer during LPEB irradiation: acceleration voltage, solenoid voltage, and number of pulses. The deburring can be performed independently.

In one embodiment, when the LPEB is irradiated with 10 pulses, the resin of the CFRP composite can be evaporated. In one embodiment, when the LPEB is irradiated with 20 pulses, the carbon fibers of the CFRP composite may be damaged to produce bundle-shaped burrs. In one embodiment, when the LPEB is irradiated with 30 pulses, the multiple burrs of the CFRP composite can be removed.

A high-quality burr-free drilled hole can be obtained by applying the LPEB-based deburring method according to an embodiment of the present invention.

5 shows an optical image of a burr before and after LPEB irradiation according to an embodiment of the present invention.

Referring to FIG. 5, for all the values of the acceleration voltage Va and the solenoid voltage Vs, more than 20 pulses may be required to evaporate the surrounding resin and separate the micro-cut carbon fibers. Through the optical microscope image, partial evaporation of the resin and fracture of the carbon fiber can be confirmed.

Instead of the hard, brittle burr observed in the drilled hole, the burr irradiated with LPEB is thin, flexible and skein-like in shape with less than 20 irradiations, is. This may indicate that the resin has partially evaporated so that the carbon fibers are not broken. In this case, the number of energy densities or irradiation pulses is too low for the resin to evaporate, so LPEB irradiation can not completely remove micro-cutting fibers.

The size of the residual burr has decreased after less than 20 pulses of irradiation, but the production of small bundle-type carbon fibers can have a negative impact on the quality of the drilled hole. This bundle-type burr may be caused by partially damaged carbon fibers.

However, if the number of irradiation pulses is increased to 30 or more, almost all the burrs can be removed. As the acceleration voltage Va and the number of pulses increased to 30, it was confirmed that the number of bundle carbon fibers was completely removed. Thus, repeated irradiation pulses can be used to remove such bundled carbon fibers.

Therefore, the solenoid voltage Vs can be increased to remove a small burr from the hole surface. 3D geometry scans can be used to further examine hole quality and deburring performance. That is, the hole precision, surface quality, and burr size before and after LPEB irradiation can be evaluated.

FIGS. 6 (a) to 6 (c) show a burr size graph when the LPEB irradiation parameters are independently varied according to an embodiment of the present invention.

Referring to FIG. 6A, when the solenoid voltage Vs and the pulse number are fixed, a change in the burr size before and after the LPEB irradiation with respect to the acceleration voltage can be confirmed. In this case, the solenoid voltage Vs was kept constant at 1.0 keV, and 10 irradiation pulses were used.

It can be seen that the average size of the remaining burr after deburring decreases slightly as the acceleration voltage Va increases. The reduction in the average size of the residual burr is due to the fact that the energy density of the LPEB increases with the acceleration voltage Va. When the acceleration voltage Va is 30 keV, the smallest burrs can be generated. In this case, the burr size can be reduced by 45.8% from 5.09 mm to 2.76 mm.

6 (a), it can be seen that the error bars indicating the distribution of the size of the residual burr largely change according to the acceleration voltage Va. As Va increased from 20 keV to 30 keV, the range of change in burr size slightly increased. This unexpected increase in size variation can adversely affect the quality of the deburred holes.

Referring to FIG. 6 (b), when the acceleration voltage Va and the solenoid voltage Vs are fixed, a change in the burr size according to the number of pulses can be confirmed. For example, the acceleration voltage Va and the solenoid voltage Vs can be fixed at 30 keV and 1.0 keV, respectively.

It can be seen that increasing the number of pulses significantly reduces the average size of the residual burr rather than increasing the acceleration voltage Va. For example, the average burr size was reduced from 5.09 mm to 1.93 mm after 20 pulses. The average burr size after 30 pulses was reduced to 0.61 mm.

It can be seen that the greatest decrease in average burr size (88%) occurs after 30 irradiation pulses. When the acceleration voltage Va is greater than 30 keV, only a submicro sized burr remains after the LPEB irradiation has been performed 30 or more times. Also, it can be seen that the quality of the drilled hole is greatly improved as indicated by the reduction of the error bars in Fig. 6 (b).

Further, referring to FIG. 6 (b), when a maximum of 20 pulses are irradiated to the holes, a burr size in a wide range of 0.5 to 3.5 mm can be confirmed. However, it can be seen that as the number of pulses increases to 30, the burr size range decreases.

Referring to FIG. 6 (c), when the acceleration voltage Va and the number of pulses are fixed, a change in the burr size according to the solenoid voltage Vs can be confirmed. In this case, the acceleration voltage Va is set to 30 keV and 30 irradiation pulses can be used.

Since the optimum value of the other parameter was used to increase the solenoid voltage Vs, the result of this experiment may be different from the previous experiment. For each value of the solenoid voltage Vs, it can be confirmed that the residual burr is extremely small.

When the solenoid voltage Vs is 1.0 keV, the residual burr is already at a submicron level, but as the solenoid voltage Vs increases, the size decreases further as shown in Fig. 6 (c) . For example, when the solenoid voltage Vs increased from 1.0 keV to 1.2 keV, the size of the remaining burrs decreased from 0.61 mm to 0.39 mm. The smallest residual burr was observed when the solenoid voltage (Vs) was 1.5 keV.

The LPEB-based deburring process reduced the size of the burr by 97% from 5.09mm to 0.17mm. That is, it can be confirmed that the LPEB irradiation almost completely removes the microcutting fibers generated by drilling.

Referring to FIG. 6 (c), as the solenoid voltage Vs changes, the burr size obtained after deburring with 30 irradiation pulses can be confirmed. The change in burr size can be very small in each case. This can mean uniform deburring performance at all edges of the drilled hole. This can be caused by the interaction between accelerating electrons and CFRP composites.

CFRP composites can consist of two completely different materials, epoxy resin and carbon fiber. Since the epoxy resin acts as an adhesive, it can generally surround the carbon fibers.

Therefore, accelerating electrons can be irradiated to the resin first. LPEB irradiation can lead to large temperature gradients and extremely high temperatures. Thus, if the energy density is sufficient, the resin can be melted or evaporated within a short pulse duration. This can mean that the accelerating electrons can reach the carbon fibers and destroy the carbon-carbon bonds to separate the micro-cutting fibers from the substrate.

Figure 7 shows an example of the calculation of the dimensional accuracy of a hole according to an embodiment of the present invention.

Referring to Figure 7, a 3D scan may be used to evaluate the dimensional accuracy of the drilled and deburred holes.

The dimensional accuracy can be calculated by comparing the position data for the drilled hole 710 obtained through the scan with the expected data for the ideal hole 720 having a diameter of 9 mm. You can estimate the dimensional difference by comparing diameters at eight different points. Dimensional accuracy can be evaluated as uniformity of the hole shape expressed by the diameter deviation.

FIG. 8 shows an example of a 3D geometric image before and after LPEB irradiation according to an embodiment of the present invention.

Referring to FIG. 8, the quality of holes drilled in CFRP composites can be negatively affected by burrs on the edges and on the surface. Particularly, CFRP composites for use in automobiles and aircraft should not cause very small burrs because microfibers can cause cracks and delamination of the stack.

The blue and red lines at the edges can indicate the position of the hole away from an ideal circle with a diameter of 9 mm.

8, it can be confirmed that the deviation between the LPEB processing holes is relatively small. It can also be seen that the slender burrs marked with red arrows lead to larger diameter deviations. It can be seen that the average diameter deviation of the holes after LPEB irradiation is greatly reduced.

It can also be seen that LPEB irradiation with a high solenoid voltage (Vs) significantly smoothened the surface of the hole. This may be due to electrons following a spiral path with a smaller radius penetrating deeper into the material than the spiral of the larger radius. LPEB irradiation with optimal parameters can remove drilled holes and nearly all burrs and bundle-type carbon fibers with nearly perfect circular shapes.

9 (a) to 9 (c) show the diameter deviation after the LPEB irradiation with respect to the acceleration voltage Va, the solenoid voltage Vs and the number of pulses according to the embodiment of the present invention.

Referring to Figure 9 (a), the relationship between the diameter deviation and the LPEB parameter may be similar to the relationship between the size of the residual burr and the LPEB irradiance parameter. As the acceleration voltage Va increases from 0 to 30 keV, the diameter deviation can be reduced from 173.4 m to 94.6 m.

Referring to FIG. 9 (b), as the number of pulses increases, the effect of LPEB on the diameter deviation can be remarkably increased. For example, it can be seen that the deviation decreases from 173.4 μm to 53 μm by 69.4%. The surface smoothing effect of the LPEB irradiation was further reduced as the solenoid voltage (Vs) increased. After 30 pulses of LPEB irradiation with a solenoid voltage (Vs) set to 1.5 keV, the diameter deviation can be reduced to 11.6 m.

Also, when the number of pulses is increased compared to when the acceleration voltage (Va) is increased, the reduction in diameter deviation is larger and appears to be most sensitive to the number of pulses. This also relates to the size of the residual burr.

Referring to FIG. 9 (c), it is confirmed that the influence of the change in the solenoid voltage Vs on the diameter deviation is similar to the influence on the size of the residual burr. When the solenoid voltage Vs is 1.0 keV, the diameter deviation is remarkably reduced and can be continuously decreased as the solenoid voltage Vs is increased.

It is possible to improve the accuracy of the hole shape by changing the parameters in the same manner as when the size of the residual burr is reduced. Specifically, by increasing the acceleration voltage Va, the solenoid voltage Vs and the number of pulses, the residual burr can be reduced and accurate hole-shaped holes can be obtained.

For drilled holes in CFRP composites, the deburring performance can be evaluated in terms of hole geometry accuracy. The remaining uncut fibers can distort the shape of the hole and reduce the quality of the hole. Thus, the LPEB-based deburring process according to one embodiment of the present invention can improve the geometric accuracy of drilled holes in CFRP composites.

10 illustrates a method of operation of an LPEB-based deburring apparatus 300 according to an embodiment of the present invention.

Referring to FIG. 10, step S1001 is a step of setting a parameter for irradiating the electron beam. For example, the electron beam may include LPEB. In one embodiment, at least one of the acceleration voltage, the solenoid voltage, and the number of pulses for the electron beam can be set. In one embodiment, the number of pulses may be greater than or equal to 30.

Step S1003 is a step of irradiating an electron beam onto a burr formed in a drilled hole of a carbon fiber-reinforced plastic composite material. For example, the carbon fiber reinforced plastic composite material may comprise a CFRP composite material. In one embodiment, depending on the number of pulses, the electron beam may be repeatedly irradiated to burrs created in the drilled holes of the carbon fiber-reinforced plastic composite material.

In one embodiment, a metal mask is formed on the carbon fiber-reinforced plastic composite material, and the metal mask may be drilled with holes of the same diameter as the drilled holes of the carbon fiber-reinforced plastic composite material.

That is, when the energy density and the number of pulses are too low, a bundle-like cut-off carbon fiber can be observed. These can degrade the quality of the holes. Thus, the LPEB-based deburring process according to an embodiment of the present invention can optimize the LPEB irradiance parameters to perform defect-free deburring in the drilled CFRP composite.

The CFRP composite with defect-free holes has a longer lifetime and thus can improve the quality of the CFRP product assembled using the LPEB-based deburring process according to one embodiment of the present invention.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Accordingly, the embodiments disclosed herein are for the purpose of describing, not limiting, the technical spirit of the present invention, and the scope of the present invention is not limited by these embodiments.

The scope of protection of the present invention should be construed according to the claims, and all technical ideas within the scope of the same should be understood as being included in the scope of the present invention.

100: Drilling device
110: Drill bit
120:
300: Deburring device
310: Vacuum chamber
320: Electronic gun
330: Moving stage
710: drilled hole
720: Theoretical Hall

Claims (10)

Setting a parameter for irradiating the electron beam; And
Irradiating the electron beam to a burr formed in a drilled hole of a carbon fiber-reinforced plastic composite material according to the set parameters;
/ RTI >
Deburring method.
The method according to claim 1,
Wherein the setting of the parameter comprises:
Setting at least one of an acceleration voltage, a solenoid voltage and a number of pulses for the electron beam;
/ RTI >
Deburring method.
3. The method of claim 2,
Wherein the step of irradiating the electron beam comprises:
Repeatedly irradiating the electron beam to a burr formed in a drilled hole of the carbon fiber-reinforced plastic composite material in accordance with the number of pulses;
/ RTI >
Deburring method.
3. The method of claim 2,
Wherein the number of pulses is at least 30,
Deburring method.
The method according to claim 1,
A metal mask is formed on the carbon fiber-reinforced plastic composite material,
Wherein the metal mask is formed by drilling a hole having the same diameter as the drilled hole of the carbon fiber-reinforced plastic composite material,
Deburring method.
A control unit for setting a parameter for irradiating the electron beam; And
An electron gun for irradiating the electron beam to a burr formed in a drilled hole of a carbon fiber-reinforced plastic composite material according to the set parameters;
/ RTI >
Deburring device.
The method according to claim 6,
Wherein,
Setting at least one of an acceleration voltage, a solenoid voltage and a number of pulses for the electron beam,
Deburring device.
8. The method of claim 7,
The electron gun
And repeatedly irradiating the electron beam to a burr formed in a drilled hole of the carbon fiber-reinforced plastic composite material, in accordance with the number of the pulses,
Deburring device.
8. The method of claim 7,
Wherein the number of pulses is at least 30,
Deburring device.
The method according to claim 6,
A metal mask is formed on the carbon fiber-reinforced plastic composite material,
Wherein the metal mask is formed by drilling a hole having the same diameter as the drilled hole of the carbon fiber-reinforced plastic composite material,
Deburring device.

Images