JP2016016423A - Manufacturing method for decorative component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for a decorative component which enables an intermediate surface to be set surely by a simple treatment and a distortion-free pattern to be drawn accurately on a decoration object curved face of a component material shaped in three dimensions.SOLUTION: A plurality of pattern data set points are set with equal intervals on a pattern data plane, and a plurality of guide points are set with equal intervals on a decoration object curved face in accordance with the pattern data set points (S111, S112). Projection lines extending from respective guide points in directions of normal vectors are set (S113). Auxiliary lines extending from respective guide points in directions of normal vectors are set (S114). An auxiliary circle with a larger radius than a distance between an intersection of the auxiliary line and the projection line and the guide point is set at each guide point (115). A curved face is so set as to come in contact with the auxiliary circle at an intersection of the auxiliary line and the projection line (116). The normal vector is extended from a pattern on the pattern data plane to the curved face to project the pattern on the curved face, thereby setting an intermediate surface.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a method for manufacturing a decorative part that draws a pattern on a curved surface to be decorated by irradiating a laser onto the curved surface to be decorated of the part material having a three-dimensional shape.

  In automobile interior parts and the like, decorative parts (for example, console boxes, instrument panels, armrests, etc.) in which decorations are added to the surface of a resin molded body in order to improve design and quality have been put into practical use. Laser drawing has been proposed as a decoration method for adding decoration to such decorative parts. Laser drawing is a decoration method in which a pattern is drawn by irradiating a decorated area on the surface of a component with a laser and changing the state of the surface of the component with heat applied by the laser.

  Specifically, the decorative region set on the surface of the resin molded body is driven by a galvano head (laser deflection unit) equipped with a galvano mirror to irradiate the laser, thereby forming a pattern and decorating. Additional laser decoration devices have been proposed. In this laser decoration device, a laser irradiation range that can be drawn is set. Therefore, when the three-dimensional shape of the resin molded body becomes complicated or the resin molded body becomes larger, a region outside the laser irradiation range is likely to occur, and the laser does not easily reach the entire surface of the resin molded body. Become. For this reason, for example, the decorated area, which is the laser irradiation range, is divided into a plurality of laser irradiation areas, and in this state, the resin molding or the galvano head is moved to an appropriate position to irradiate the laser for each laser irradiation area. (For example, refer to Patent Document 1).

  By the way, when laser drawing is performed on the surface 51 of the decorative component 50 shown in FIG. 15 using a conventional laser decoration device as disclosed in Patent Document 1, the pattern 53 on the plane 52 is three-dimensional. The image data is created by projecting onto the component surface 51. In addition, since the component size is large in the decorative component 50 of FIG. 15, laser drawing is performed by dividing the laser irradiation region on the upper surface side and the side surface side. In this case, the drawing position of the pattern 53 is shifted at the joint portion 55 between the laser irradiation regions. In addition, when laser drawing is performed on the component surface 51 having a large shape change, the pattern 53 may be distorted in accordance with the shape change, and the interval between the patterns 53 may vary. As a result, the design of the component surface 51 is deteriorated, so that a high-quality decorative component 50 cannot be obtained.

  Therefore, the inventor of the present application sets an intermediate surface 60 between the handle 53 on the plane 52 and the component surface 51 (decorated curved surface) as shown in FIG. A method of performing laser drawing corresponding to the shape has been proposed (see Patent Document 2). Specifically, the intermediate surface 60 is assumed to be a curved surface whose degree of bending is smaller than that of the decorated curved surface 51, and a normal vector is extended from the handle 53 on the plane 52 toward the curved surface, and the handle is placed on the curved surface. The intermediate surface 60 is set by projecting. Further, the normal vector is extended from the pattern on the intermediate surface 60 toward the decorated curved surface 51 to project the pattern onto the decorated curved surface 51, thereby creating three-dimensional drawing data. By performing laser drawing based on the three-dimensional drawing data, it is possible to draw a pattern without distortion on the decorated curved surface 51 of the decorative component 50.

JP 2011-110570 A JP 2014-101090 A

  By the way, the intermediate surface 60 differs depending on the curved surface shape and size of the decorated curved surface 51. Therefore, when laser drawing is performed on the decorative component 50 having a different curved surface shape and size, the intermediate surface 60 corresponds to the curved surface shape and size. It is necessary to set the optimum intermediate surface 60 each time. However, conventionally, since the intermediate surface 60 is set by trial and error in accordance with the shape change of the decorated curved surface 51, it takes time and effort. In particular, when the change in the curved surface shape on the decorated curved surface 51 is large, it is necessary to set a plurality of intermediate surfaces between the handle 53 on the plane 52 and the decorated curved surface 51, and three-dimensional drawing data is created. As a result, the work time becomes longer.

  The present invention has been made in view of the above problems, and its purpose is to reliably set the intermediate surface with a simple process, and to accurately place a pattern without distortion on the decorated curved surface of a three-dimensional component material. It is in providing the manufacturing method of the decorative component which can be drawn in.

  And as a means (means 1) for solving the above-mentioned problem, a decorated surface of a part material having a three-dimensional shape is set at a predetermined position in a virtual three-dimensional space, and the position is above the decorated curved surface. A pattern data plane setting step for setting a pattern data plane with a pattern for laser drawing on an unbent plane, and between the surface to be decorated and the pattern data plane, An intermediate surface is set by assuming a curved surface with a small degree of bending and extending a normal vector from the handle on the handle data plane toward the curved surface and projecting the handle onto the curved surface. An intermediate surface setting step and creating a three-dimensional drawing data by projecting the pattern onto the surface to be decorated by extending a normal vector from the pattern on the intermediate surface toward the surface to be decorated 3D drawing And performing a data creation step, and by irradiating a laser on the decorated curved surface of the component material based on the three-dimensional drawing data, the decorative component drawing the pattern on the decorated curved surface of the component material In the manufacturing method, the intermediate surface setting step includes a data setting step of setting a plurality of pattern data setting points at equal intervals on the pattern data plane, and a plurality of reference points on the decorated curved surface. A guide point setting step for setting at equal intervals corresponding to the data set points, and starting from the plurality of pattern data set points, and extending in the direction of the normal vector of the decorated curved surface side and the pattern data plane A projection line setting step for setting each projection line, and an auxiliary line extending in the direction of the normal vector from the plurality of reference points, assuming a normal vector for each of the plurality of reference points on the decorated curved surface An auxiliary line setting step for setting each of the above-mentioned points, and a circle centered on the plurality of reference points on the decorated curved surface, wherein the auxiliary line corresponding to the pattern data setting point intersects the projection line An auxiliary circle setting step for setting auxiliary circles each having a radius larger than the distance between the intersection point and the reference point, and setting the curved surface so as to contact the auxiliary circle at the intersection point of the auxiliary circle and the projection line There is a method for manufacturing a decorative part including a curved surface setting step.

  According to the invention described in the means 1, according to the shape of the surface to be decorated by a relatively simple process without setting an intermediate surface according to the surface to be decorated of the component material by trial and error as in the prior art. It is possible to set the intermediate surface exactly as intended. As a result, the work time for setting the intermediate surface can be shortened, and the manufacturing cost of the decorative part can be kept low. Furthermore, by performing laser drawing using the intermediate surface, it is possible to accurately draw a pattern without distortion on the decorated curved surface of the part material having a three-dimensional shape.

  Specifically, in the auxiliary circle centered on multiple reference points, the radius of the auxiliary circle at the reference point with the longest distance from the pattern data setting point is the largest, and the radius is between the intersection and the reference point. The distance is 1.1 times or less. In addition, in the auxiliary circle centered on multiple reference points, the ratio of the radius to the distance between the intersection and the reference point is such that the distance between the pattern data set point and the reference point corresponding to the pattern data set point is long. It is set to become smaller. If it does in this way, according to the shape of a to-be-decorated curved surface, the intermediate | middle surface where a curvature will become so large that it is spaced apart from a pattern data plane can be set reliably.

  Further, in the auxiliary circle centered on a plurality of guide points, the radius may be set to be larger as the distance between the handle data set point and the guide point corresponding to the handle data set point is longer. Further, in the auxiliary circle centered on a plurality of reference points, the radius may be set such that the larger the inclination angle of the decorated curved surface at the reference point with respect to the pattern data plane, the larger the radius. Further, in the auxiliary circle centered on a plurality of guide points, the radius may be set to be larger as the guide point is located farther from the pattern data plane. Even if it does in this way, the intermediate surface where a curvature becomes large according to the shape change of a to-be-decorated curved surface can be set reliably. In particular, even if the reference point is located away from the pattern data plane and the angle of inclination of the decorated curved surface at the reference point increases, the intermediate surface corresponding to the decorated curved surface can be set reliably. .

  The pattern data set point on the pattern data plane is preferably a set point set corresponding to a square lattice pattern. More preferably, the interval between the pattern data set points on the pattern data plane is equal to the interval between the reference points on the surface to be decorated. In this way, since the pattern data set point on the pattern data plane is a simple pattern figure, it is easy to design and the data processing load is reduced. Therefore, the intermediate surface can be set efficiently and reliably with a simple process.

  As described above in detail, according to the invention described in the means 1, the intermediate surface can be reliably set by a simple process, and the pattern without distortion is accurately placed on the decorated curved surface of the three-dimensional part material. Can be drawn to.

The perspective view which shows the vehicle interior components manufactured with the manufacturing method of one embodiment. The expanded sectional view showing the interior parts for vehicles of one embodiment. The schematic block diagram which shows the laser decoration apparatus of one Embodiment. The flowchart which shows the manufacturing method of the interior component for vehicles of one Embodiment. The perspective view which shows a to-be-decorated curved surface and a pattern data plane. The flowchart which shows the process example which sets an intermediate | middle surface. Explanatory drawing which shows a data setting step. Explanatory drawing which shows a reference point setting step. Explanatory drawing which shows a projection line setting step. Explanatory drawing which shows an auxiliary line setting step. Explanatory drawing which shows an auxiliary circle setting step. Explanatory drawing which shows a curved surface setting step. Explanatory drawing which shows a stereo image data creation step. The perspective view which shows the vehicle interior components by which the lattice pattern with pattern elongation was drawn. Explanatory drawing which shows the decorating method by the conventional laser drawing. Explanatory drawing which shows the decorating method by the conventional laser drawing.

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

  FIG. 1 is a perspective view showing a vehicle interior part 1 as a decorative part, and FIG. 2 is an enlarged cross-sectional view showing the vehicle interior part 1. As shown in FIGS. 1 and 2, the vehicle interior part 1 includes a part material 2 having a three-dimensional shape and a coating film 3 formed so as to cover the surface of the part material 2. Yes. The component material 2 of the present embodiment has a substantially U shape including a flat main portion 2a and a pair of side portions 2b and 2c arranged continuously therewith. On the surface of the coating film 3, for example, a rectangular lattice pattern 4 is drawn. The vehicle interior part 1 of the present embodiment is a part that constitutes, for example, an armrest of an automobile door. The component material 2 is a resin molded body molded using an ABS resin, and is colored black as a whole. The coating film 3 covering the surface of the component material 2 is formed using a high gloss black (piano black) paint. The lattice pattern 4 is decorated on the coating film 3 by laser drawing (specifically, laser ablation processing). Laser ablation processing refers to non-heating processing utilizing a phenomenon in which a solid is irradiated by laser irradiation and atoms, molecules, and clusters are directly evaporated without melting and the solid surface is scraped off.

  The lattice pattern 4 of the present embodiment is composed of a laser processed groove M1 having a line width W1 drawn by laser irradiation of 30 μm to 110 μm and a depth D1 of 6 μm to 16 μm. The reason is that by setting the line width W1 and the depth D1 within the above ranges, the surface reflection state becomes suitable and uniform, so that the occurrence of reflection differences is suppressed and the target design is realized. It is because it becomes easy to be done. In order to reliably draw the lattice pattern 4, it is preferable to set the line width W1 of the laser processing groove M1 to 50 μm to 90 μm and the depth D1 to 10 μm to 16 μm.

  FIG. 3 shows a laser decorating device 11 for decorating the handle 4 on the vehicle interior part 1. The laser decoration device 11 of the present embodiment includes a support base 12 that supports the vehicle interior part 1, a workpiece displacement robot 13 that moves the support base 12 to change the posture of the vehicle interior part 1, and the vehicle. A laser irradiation device 14 for irradiating the surface of the interior component 1 with a laser L1 and a control device 15 for controlling the workpiece displacement robot 13 and the laser irradiation device 14 are provided.

  The workpiece displacement robot 13 includes a robot arm 13a, and a support base 12 is supported at the tip thereof. The workpiece displacement robot 13 drives the robot arm 13a to move the support base 12 in the vertical direction, the horizontal direction, and the rotation direction, thereby changing the position and posture of the vehicle interior part 1 (part material 2). As a result, the irradiation position and irradiation angle of the laser L1 with respect to the surface of the vehicle interior part 1 (part material 2) are changed.

The laser irradiation device 14 includes a laser generation unit 21 that generates a laser L1 having a predetermined wavelength (for example, a YVO ₄ laser having a wavelength of 1064 nm), a laser deflection unit 22 that deflects the laser L1, and the laser generation unit 21 and the laser deflection unit 22. And a laser control unit 23 for controlling. The laser deflection unit 22 is an optical system in which a lens 24 and a reflection mirror 25 are combined. By changing the positions of the lens 24 and the reflection mirror 25, the irradiation position and focal position of the laser L1 are adjusted. It has become. The laser control unit 23 adjusts the laser irradiation conditions such as the irradiation intensity of the laser L1 and the scanning speed of the laser L1 by controlling the laser generation unit 21 and the laser deflection unit 22.

  The control device 15 is configured by a known computer including a CPU 31, a memory 32, an input / output port 33, and the like. The control device 15 is electrically connected to the workpiece displacement robot 13 and the laser irradiation device 14, and controls the workpiece displacement robot 13 and the laser irradiation device 14 by various drive signals.

  The memory 32 of the control device 15 stores a program and data for drawing the pattern 4 on the surface of the component material 2. Specifically, data such as shape data indicating the three-dimensional shape of the vehicle interior part 1 and pattern data corresponding to the pattern 4 drawn on the vehicle interior part 1 are stored. The memory 32 stores a program and data for controlling the workpiece displacement robot 13 and the laser irradiation device 14.

  Next, a method for manufacturing the vehicle interior part 1 will be described with reference to the flowchart of FIG. In addition, before starting the process of FIG. 4, what prepared by apply | coating and forming the coating film 3 on the surface of the component raw material 2 shape | molded using ABS resin is prepared. Here, the entire surface side of the part material 2 (main part 2a and side parts 2b, 2c) having a three-dimensional shape is a decorated curved surface.

  When the processing of FIG. 4 is started, the CPU 31 sets the decorated curved surface 41 of the component material 2 at a predetermined position in the virtual three-dimensional space, as shown in FIG. Further, the CPU 31 sets a pattern data plane 42 provided with a pattern 4a for laser drawing on a flat surface above the decorated curved surface 41 (step S100 as a pattern data plane setting step). In the present embodiment, since the surface of the main part 2a of the component material 2 is a flat surface, the pattern data plane 42 is set so that the surface to be decorated 41 is in contact with the flat surface 41a (main part). In this case, the pattern data plane 42 is set at a position away from the curved surface 41 in the side portions 41 b and 41 c (parts corresponding to the side portions 2 b and 2 c of the component material 2) in the decorated curved surface 41. The pattern 4 a in the pattern data plane 42 is an area corresponding to the surface area of the surface to be decorated 41 and is set in a state where the center position thereof is matched with the center position of the surface to be decorated 41.

  Next, the CPU 31 assumes a curved surface having a smaller degree of bending than the decorated curved surface 41 between the decorated curved surface 41 and the handle data plane 42 and changes from the handle 4a on the patterned data plane 42 to the curved surface. An intermediate surface is set by extending the normal vector and projecting the handle 4a onto the curved surface (step S110 as an intermediate surface setting step).

  In the present embodiment, the CPU 31 executes each process (step S111 to step S116) shown in FIG. 6 in order to set an intermediate surface. More specifically, as shown in FIG. 7, the CPU 31 sets a plurality of pattern data setting points PA1, PA2, PA3,... At equal intervals on the pattern data plane 42 (step S111 as a data setting step). That is, the pattern data set points PA1, PA2, PA3,... Are set points set in correspondence with the rectangular lattice pattern.

  Further, as shown in FIG. 8, the CPU 31 sets a plurality of reference points PB1, PB2, PB3,... On the decorated curved surface 41 at equal intervals corresponding to the pattern data set points PA1, PA2, PA3,. Set (step S112 as a reference point setting step). In the present embodiment, the intervals between the pattern data set points PA1, PA2, PA3,... On the pattern data plane 42 and the intervals between the reference points PB1, PB2, PB3,. Are set with reference points PB1, PB2, PB3,.

  Next, as shown in FIG. 9, the CPU 31 starts from a plurality of pattern data set points PA1, PA2, PA3,..., And from there to the direction of the normal vector on the decorated curved surface 41 side and the pattern data plane 42. The extended projection lines LA1, LA2, LA3,... Are set (step S113 as a projection line setting step). Further, as shown in FIG. 10, the CPU 31 assumes a normal vector for each of the plurality of reference points PB1, PB2, PB3,... On the decorated curved surface 41, and a plurality of reference points PB1, PB2, PB3,. Auxiliary lines LB1, LB2, LB3,... Extending in the direction of the normal vector from each are set (step S114 as an auxiliary line setting step).

  Further, as shown in FIG. 11, the CPU 31 is a circle centered on a plurality of reference points PB1, PB2, PB3,... On the decorated curved surface 41, and the pattern data set points PA1, PA2, PA3. The distance between the intersection points PC1, PC2, PC3,... Where the auxiliary lines LB1, LB2, LB3,... And the projection lines LA1, LA2, LA3,. Each of the auxiliary circles CA1, CA2, CA3,... Having a larger radius is set (step S115 as an auxiliary circle setting step). Here, the size of each auxiliary circle CA1, CA2, CA3,... Is adjusted so that the shape of the intermediate surface changes smoothly.

  Specifically, in each of the auxiliary circles CA1, CA2, CA3,..., The radius of the auxiliary circle CA1 at the reference point PB1 having the longest distance from the pattern data set points PA1, PA2, PA3,. The radius of the circle CA1 is not more than 1.1 times the distance between the intersection point PC1 and the reference point PB1 (almost 1 time in the present embodiment). In each of the auxiliary circles CA1, CA2, CA3,..., The ratio of the radius to the distance between the intersection points PC1, PC2, PC3,... And the reference points PB1, PB2, PB3,. , PA3,... And the design point PB1, PB2, PB3,... Corresponding to the pattern data set points PA1, PA2, PA3,. Specifically, the radius ratio in the auxiliary circle CA5 where the distance between the intersection point PC5 and the reference point PB5 is short is about 3.2 times, and the radius ratio in the auxiliary circle CA4 is about 2.5 times. The radius ratio in the auxiliary circle CA3 is about 2.0 times, and the radius ratio in the auxiliary circle CA2 is about 1.5 times. Further, the radius ratio in the auxiliary circle CA1 having the longest distance between the intersection point PC1 and the reference point PB1 is about 1 time.

  In the present embodiment, the pattern data set points PA1, PA2, PA3,... And the reference points PB1, PB2, PB3,... Corresponding to the pattern data set points PA1, PA2, PA3,. Each of the auxiliary circles CA1, CA2, CA3,... Is set so that the radius becomes larger. In other words, the auxiliary circles CA1, CA2, CA3,... Are set so that the radius becomes larger as the reference points PB1, PB2, PB3,. Further, the auxiliary circles CA1, CA2, CA3,... Are set so that the radius becomes larger as the inclination angle of the decorated curved surface 41 at the reference points PB1, PB2, PB3,. Has been.

  Thereafter, as shown in FIG. 12, the CPU 31 sets the auxiliary circles CA1, CA1, CA2, CA3,... And the projection lines LA1, LA2, LA3,. The curved surface 44 is set so as to be in contact with CA2 and CA3 (step S116 as a curved surface setting step).

  As shown in FIG. 13, the CPU 31 extends the normal vector V <b> 1 from the handle 4 a on the handle data plane 42 toward the curved surface 44 and projects the handle 4 a onto the curved surface 44. Set. The intermediate surface 45 is disposed at a substantially intermediate position between the decorated curved surface 41 and the pattern data plane 42, and is set as a surface that covers the entire decorated curved surface 41.

  Further, the CPU 31 creates the three-dimensional drawing data by projecting the pattern 4a onto the decorated curved surface 41 by extending the normal vector V2 from the handle 4a on the intermediate surface 45 toward the decorated curved surface 41. (Step S120 as a three-dimensional drawing data creation step). In FIG. 13, for convenience of explanation, the interval between the patterns 4a is substantially equal to the interval between the set points PA1, PA2, PA3,... Set in step S111, but the actual pattern 4a is set at the set points PA1, PA2. , PA3,... Further, the 3D drawing data is created by projecting the pattern 4a on the pattern data plane 42 onto the flat main portion 41a of the decorated curved surface 41. That is, in the main part 41a, the pattern 4a on the pattern data plane 42 and the three-dimensional drawing data match.

  Next, the CPU 31 divides the three-dimensional drawing data into a plurality of irradiation regions in consideration of the laser irradiation range (three-dimensional drawing data dividing step). Specifically, the CPU 31 obtains the size of the decorated curved surface 41 based on the shape data related to the decorated curved surface 41, and compares the decorated curved surface 41 with the laser irradiation range (step S130). The laser irradiation range is an irradiation range in which the laser processing groove M1 having the above-described line width W1 of 50 μm to 90 μm and the depth D1 of 10 μm to 16 μm can be formed, and has a horizontal width and length. In addition, it includes a range of vertical heights.

  When the CPU 31 determines that the decorated curved surface 41 is larger, the CPU 31 performs a dividing process for dividing the three-dimensional drawing data into a plurality of irradiation areas (step S140). Here, when the width and length of the surface to be decorated 41 are larger than the irradiation range of the width and length in the horizontal direction, the three-dimensional drawing data of the surface to be decorated 41 is divided. Furthermore, when the shape change of the height with respect to the width or the length is larger than a predetermined value on the decorated curved surface 41, the three-dimensional drawing data of the decorated curved surface 41 is divided. In the case of the component material 2 in the present embodiment, since the shape change of the height with respect to the width is larger than a predetermined value, the three irradiation areas of the main part 41a of the decorated curved surface 41 and the left and right side parts 41b and 41c Divide the 3D rendering data. Furthermore, CPU31 determines the attitude | position at the time of laser irradiation of the component raw material 2 for every some irradiation area | region (step S150).

  Thereafter, the CPU 31 controls the workpiece displacement robot 13 based on the posture data, and drives the robot arm 13a to change the posture of the component material 2 according to the irradiation area. At this time, the CPU 31 controls the laser irradiation device 14 based on the divided three-dimensional drawing data, changes the position and angle of the laser deflection unit 22 as appropriate, and outputs the laser L1 from the laser generation unit 21 (laser drawing process). Step S160). As a result, the laser beam L1 is irradiated on the decorated curved surface 41 of the component material 2, and the pattern 4 is drawn on the decorated curved surface 41.

  On the other hand, in step S130, when the CPU 31 determines that the laser irradiation range is larger than the decorated curved surface 41, the CPU 31 proceeds to step S150 without performing the division processing in step S140, and at the time of laser irradiation of the component material 2 Determine the posture. Thereafter, the CPU 31 performs a laser drawing process (step S160) on the component material 2 based on the attitude data and the three-dimensional drawing data. And CPU31 complete | finishes the process of FIG. 4, after performing the laser drawing process of step S160.

  By performing the laser drawing process as described above, as shown in FIG. 1, the lattice pattern 4 having no pattern elongation (see FIG. 14) can be accurately drawn on the side portions 2b and 2c of the component material 2, The interior part 1 for a vehicle excellent in design is manufactured. FIG. 14 shows a lattice pattern 4 when laser drawing is performed without using the intermediate surface 45 as a comparative example, and the lattice patterns 4 on the side portions 2b and 2c are compared to the flat main portion 2a. It is drawn in a stretched state.

  Therefore, according to the present embodiment, the following effects can be obtained.

  (1) In this embodiment, it is relatively simple as shown in FIG. 6 without setting the intermediate surface 45 corresponding to the decorated curved surface 41 of the component material 2 by trial and error as in the prior art. In the process (steps S111 to S116), the intended intermediate surface 45 according to the shape of the decorated curved surface 41 can be set reliably. As a result, the work time for setting the intermediate surface 45 can be shortened, and the manufacturing cost of the vehicle interior part 1 can be kept low. Furthermore, by performing laser drawing using the intermediate surface 45, the pattern 4 without distortion can be accurately drawn on the decorated curved surface 41 of the part material 2 having a three-dimensional shape.

  (2) In the present embodiment, in the plurality of auxiliary circles CA1, CA2, CA3,..., The radius of the auxiliary circle CA1 at the reference point PB1 having the longest distance from the pattern data set points PA1, PA2, PA3,. The radius of the auxiliary circle CA1 is set to be 1.1 times or less of the distance between the intersection PC1 and the reference point PB1. Further, the ratio of the radius to the distance between the intersection points PC1, PC2, PC3,... And the reference points PB1, PB2, PB3,... Is the pattern data set points PA1, PA2, PA3,. Are set such that the longer the distance from the reference points PB1, PB2, PB3,... Corresponding to PA2, PA3,. In this way, according to the shape change of the decorated curved surface 41, the intermediate surface 45 can be reliably set such that the curvature increases as the distance from the pattern data plane 42 increases.

  (3) In the present embodiment, the pattern data set points PA1, PA2, PA3,... On the pattern data plane 42 are set points set in correspondence with rectangular lattice patterns. Further, the intervals between the pattern data set points PA1, PA2, PA3,... On the pattern data plane 42 and the intervals between the reference points PB1, PB2, PB3,. In this way, the intermediate surface 45 can be set efficiently and reliably with a simple process. If the rectangular lattice pattern is, for example, a square lattice pattern, the process becomes simpler and the intermediate surface 45 can be set more efficiently.

  In addition, you may change embodiment of this invention as follows.

  In the above embodiment, the pattern data plane 42 is set so as to be in contact with the main portion 41a of the decorated curved surface 41, but the present invention is not limited to this. The pattern data plane 42 may be set at a position spaced above the main portion 41 a of the decorated curved surface 41. Even in this case, the intermediate surface 45 can be set between the decorated curved surface 41 and the pattern data plane 42 by performing the processing of FIG.

  In the vehicle interior part 1 of the above embodiment, the pattern drawn on the decorated curved surface 41 is the lattice pattern 4, but the pattern is not limited to this, and a complicated pattern such as a carbon-like pattern is used. You may comprise so that it may draw. When a carbon-like pattern is drawn on the part material 2 having the same shape as the above-described embodiment, the surface to be decorated 41 is an intermediate surface using the data of the curved surface 44 obtained in each process of FIG. 45 is set. Then, by performing laser drawing using the intermediate surface 45, a carbon-like pattern without distortion can be accurately drawn on the decorated curved surface 41 of the component material 2. In addition, even when a carbon-like pattern is drawn on a part material having a different shape of the decorated curved surface from the above embodiment, an intermediate surface corresponding to the shape of the decorated curved surface can be obtained by performing the process of FIG. It can be set easily. That is, a curved surface corresponding to the shape of the surface to be decorated is set based on the pattern data setting points PA1, PA2, PA3,... And the reference points PB1, PB2, PB3,. Easily set up the intermediate surface by projecting a carbon-like pattern. Then, by performing laser drawing using the intermediate surface, a carbon-like pattern without distortion can be accurately drawn on the decorated curved surface of the component material.

  In each of the above embodiments, the workpiece displacement robot 13 changes the posture of the component material 2 to perform laser drawing of each irradiation region. However, the laser irradiation device 14 side is moved to move the laser of each irradiation region. Drawing may be performed. Specifically, the laser deflection unit 22 in the laser irradiation device 14 is supported and fixed to the tip of the robot arm 13a. And the irradiation position and irradiation angle of the laser L1 with respect to the surface of the component raw material 2 are changed by changing the position and angle of the laser deflection | deviation part 22 suitably by the drive of the robot arm 13a. Even if comprised in this way, in the to-be-decorated curved surface 41 of the component raw material 2, it can divide | segment into a some irradiation area | region and can perform laser drawing, and the pattern 4 can be drawn reliably.

  The pattern 4 in the above embodiment is drawn on the black paint film 3, but may be drawn on the surface of another colored paint film depending on the type of picture to be drawn. In addition to the coating film 3 formed by painting, a pattern may be formed on a film formed by plating or a film formed by vapor deposition. Furthermore, the coating film 3 that covers the surface of the resin molded body 2 may be omitted, and the handle 4 may be directly drawn on the surface of the resin molded body 2.

  -Although the said embodiment was concretely embodied in the door armrest which is the vehicle interior part 1, you may materialize in decorative parts, such as a console box and an instrument panel, in addition to this. Of course, in addition to the vehicle interior part 1, the present invention may be embodied in decorative parts such as decorative panels for furniture and home appliances.

  Next, in addition to the technical ideas described in the claims, the technical ideas grasped by the embodiments described above are listed below.

  (1) The means 1 is characterized in that, in the auxiliary circle centered on the plurality of reference points, the radius is set to be larger as the reference point is located farther from the pattern data plane. Manufacturing method of decorative parts.

  (2) A method for producing a decorative part, characterized in that, in the means 1, the interval between the pattern data set points on the pattern data plane is equal to the interval between the reference points on the surface to be decorated.

  (3) The method for manufacturing a decorative part, characterized in that the means 1 further comprises a three-dimensional drawing data dividing step for dividing the three-dimensional drawing data into a plurality of irradiation regions in consideration of the laser irradiation range.

  (4) The method of manufacturing a decorative part according to means 1, wherein the decorative part is an interior part for a vehicle.

DESCRIPTION OF SYMBOLS 1 ... Interior part for vehicles as decoration part 2 ... Parts material 4a ... Pattern for laser drawing 41 ... Decorated curved surface 42 ... Pattern data plane 44 ... Curved surface 45 ... Intermediate surface CA1-CA3 ... Auxiliary circle L1 ... Laser LA1 -LA3 ... projection line LB1-LB3 ... auxiliary line PA1-PA3 ... pattern data setting point PB1-PB3 ... reference point PC1-PC3 ... intersection of auxiliary line and projection line PD1-PD3 ... intersection of auxiliary circle and projection line

Claims (6)

A decorated curved surface of a part material having a three-dimensional shape is set at a predetermined position in a virtual three-dimensional space, and a pattern for laser drawing is attached to a position above the decorated curved surface on an unbent plane. A pattern data plane setting step for setting a pattern data plane;
Assuming a curved surface between the decorated curved surface and the pattern data plane that is less curved than the decorated curved surface, and a normal vector from the pattern on the patterned data plane toward the curved surface An intermediate surface setting step of setting an intermediate surface by projecting the pattern onto the curved surface by extending
A three-dimensional drawing data creation step of creating three-dimensional drawing data by projecting the pattern onto the decorated curved surface by extending a normal vector from the handle on the intermediate surface toward the decorated curved surface; After performing the above, a method of manufacturing a decorative part that draws a pattern on the decorated curved surface of the component material by irradiating a laser on the decorated curved surface of the component material based on the three-dimensional drawing data, ,
The intermediate surface setting step includes
A data setting step for setting a plurality of pattern data setting points at equal intervals on the pattern data plane;
A guide point setting step for setting a plurality of guide points on the decorated curved surface at equal intervals corresponding to the pattern data set points;
A projection line setting step for setting each of projection lines starting from the plurality of pattern data setting points and extending in the direction of a normal vector of the surface to be decorated and the pattern data plane;
Auxiliary line setting step that assumes a normal vector for each of the plurality of reference points on the decorated curved surface, and sets each auxiliary line extending in the direction of the normal vector from the plurality of reference points;
A distance between the reference point and the intersection point of the auxiliary line corresponding to the pattern data setting point and the projection line, which is a circle centered on the plurality of reference points on the decorated curved surface An auxiliary circle setting step for setting each auxiliary circle having a larger radius than
And a curved surface setting step of setting the curved surface so as to contact the auxiliary circle at an intersection of the auxiliary circle and the projection line.   In the auxiliary circle centering on the plurality of reference points, the radius of the auxiliary circle at the reference point having the longest distance from the pattern data setting point is the largest, and the radius is the intersection point and the reference point. It is 1.1 times or less of the distance between these, The manufacturing method of the decorative component of Claim 1 characterized by the above-mentioned.   In the auxiliary circle centered on the plurality of reference points, the ratio of the radius to the distance between the intersection and the reference point is the pattern data set point and the reference point corresponding to the pattern data set point. The method for producing a decorative part according to claim 1, wherein the longer the distance is set, the smaller the distance is set.   In the auxiliary circle centered on the plurality of reference points, the radius is set to be larger as the distance between the pattern data setting point and the reference point corresponding to the pattern data setting point is longer. The manufacturing method of the decorative component of any one of Claim 1 thru | or 3.   In the auxiliary circle centered on the plurality of reference points, the radius is set to be larger as the inclination angle of the decorated curved surface at the reference point is larger with respect to the pattern data plane. The manufacturing method of the decorative component of any one of Claim 1 thru | or 4.   The method for manufacturing a decorative part according to any one of claims 1 to 5, wherein the pattern data set point is a set point set corresponding to a square lattice pattern.

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