JP4328583B2 - Manufacturing method of workpiece by laser cutting device - Google Patents

Description

  The present invention relates to a method of manufacturing a workpiece with a laser of a laser cutting device, and more particularly to a method of manufacturing a workpiece that makes the edge of a cut surface a large obtuse angle.

  Conventionally, a laser cutting device is known as a device for cutting a thin plate to a thick plate of various materials such as a metal plate. Laser cutting equipment can precisely cut any complicated shape with a laser when cutting hard materials such as metal, and it can cut at high speed, making high-precision processed products possible. Can be made. However, since the cutting accuracy by the laser is high, when a hard material such as metal is cut, the front surface 42 of the workpiece 40 and the edge 48 between the back surface 44 and the cutting surface 46 are perpendicular and sharp as shown in FIG. It becomes a state. For this reason, when the workpiece 40 is placed in contact with a person, a finger or the like may touch the sharp edge 48 and the finger or the like may be cut by the edge 48.

  Thus, since the edge 48 is sharp in the workpiece 40 cut by the laser cutting device, the sharp edge 48 needs a shaving work such as a file burring or sanding burring process or a deburring process using a deburring machine. Become. Such processing operations such as filing, sanding, and deburring generally depend on human power, and have the disadvantages of being time consuming and costly.

  The present invention has been made in view of the above points, and it is an object of the present invention to provide a method of manufacturing a workpiece by a laser cutting apparatus that prevents a sharp edge from being generated on a cut surface cut by a laser. is there.

The present invention cuts a workpiece into a product portion and a removal portion with a laser of a laser cutting device, and the product from both sides of the front and back surfaces of the workpiece set cutting position as a pre-process for cutting the workpiece by laser. A groove having an inclined surface on a partial side is formed by groove forming means, and when the groove is formed by the groove forming means, an angle of an edge between the front surface and the inclined surface, and the back surface and the inclined surface, When the angle of the edge between is set to an obtuse angle at which the finger does not break even if the finger touches, then the inclined surface on the product part side is cut with a laser, and the inclined surface on the product part side is cut with a laser Further, the angle of the edge between the inclined surface and the cut surface is an obtuse angle at which the finger does not break even if the finger touches it .

In the present invention, the angle of the edge between the front surface and the inclined surface and the angle of the edge between the back surface and the inclined surface are around 135 degrees or more. In the present invention, when the inclined surface on the product part side is cut with a laser, the angle of the edge between the cut surface and the inclined surface is set to an angle of around 135 degrees or more. In the present invention, the groove is a V groove, and the opening angle of the V groove is 90 degrees or an obtuse angle.

  Before the workpiece is cut by the laser, a groove having an inclined surface at least on the product portion side is formed by groove forming means on the front and back surfaces of the workpiece at the cutting position. Thereby, the angle θ2 of the edge between the front and back surfaces and the inclined surface on the product part side becomes an obtuse angle with a large angle. Thereafter, an appropriate position of the inclined surface on the side to be the product portion in the workpiece is cut with a laser. As a result, the edge angle θ3 between the inclined surface and the cut surface becomes a large obtuse angle. As described above, in the present invention, the angles θ2 and θ3 of the edges formed at the cut portions of the workpiece are obtuse angles having large angles, and the fingers are not cut at these edges. This eliminates the need for manual processing operations such as filing, sanding, and deburring after laser cutting.

  Next, the present invention will be described with reference to the drawings. FIG. 1 shows a first work process according to the present invention and is a cross-sectional view showing a state in which grooves are formed in a work piece by a mold. The workpiece 10 made of a hard material such as metal is divided into a product portion 10a and a removal portion 10b by a laser of a laser cutting device. Before the workpiece 10 is cut by the laser cutting device, the upper and lower molds 16a and 16b as the groove forming means are formed on the front surface 12 and the back surface 14 of the cutting setting position of the workpiece 10 so as to form the grooves 18. The groove forming means for forming the grooves 18 on the front surface 12 and the back surface 14 of the workpiece 10 may be any means as long as it forms grooves, and is not particularly limited to the molds 16a and 16b. Grooves 18 on the front surface 12 and the back surface 14 of the workpiece 10 are formed at a position to be cut by a laser (a position of a CC line described later). Here, the front surface 12 and the back surface 14 are assumed to be explanatory. Formation of the groove 18 on the front surface 12 and the back surface 14 of the workpiece 10 by the groove forming means is performed by an apparatus different from the laser cutting apparatus. Note that a device provided with groove forming means may be provided in the laser cutting device, and the groove 18 may be formed in the workpiece 10 by the groove forming means.

  In the groove 18 formed by the upper and lower molds 16a and 16b, the upper and lower inclined surfaces 20 are formed at least on the product portion 10a side. The inclined surface 20 may be linear or curved. However, the inclined surface 20 formed on the product portion 10a side of the groove 18 is preferably V-shaped with a simple cross-sectional shape. When the cross-sectional shape of the groove 18 is V-shaped, the inclined surface 22 is also formed in the removed portion 10b where the groove 18 is formed. In the groove 18, the angle θ <b> 1 formed by the inclined surface 20 of the product portion 10 a and the inclined surface 22 of the removed portion 10 b is preferably an obtuse angle.

  When the groove 18 is formed by the upper and lower molds 16a and 16b, the intersection where the front surface 12 and the back surface 14 and the inclined surface 20 intersect on the product portion 10a side is defined as a first intersection (edge) 24, and the front surface 12 and the back surface 14 An angle formed with the inclined surface 20 is defined as an angle θ2. Here, when the angle θ1 is a right angle, θ2 is (90 degrees + 90 degrees / 2) = 135 degrees. If the angle θ1 is a large obtuse angle, for example, 120 degrees, the angle θ2 of the first intersection 24 is 150 degrees, and θ2 becomes a larger obtuse angle.

  FIG. 2 is a plan view showing a state in which a stamp or groove is formed on the workpiece 10. First, the corner grooves 18a are formed at the inflection points and corners of the cutting setting position of the workpiece 10, and the corner grooves 18a are communicated with each other through the linear grooves 18b. A series of grooves 18 to be cut with a laser are formed on the workpiece 10 by connecting the corner grooves 18a with the linear grooves 18b several times. These corner grooves 18a and linear groove 18b are formed by groove forming means such as upper and lower molds 16a and 16b.

  What formed the groove | channel 18 in the workpiece 10 is demonstrated based on FIG. The deepest tip of the V groove on the front surface 12 and the back surface 14 is defined as the deepest tip point 26 with the groove 18 as a V groove. A line connecting the deepest tip point 26 on the front surface 12 side and the deepest tip point 26 on the back surface 14 side is taken as an AA line. If a line connecting the first intersection (edge) 24 of the front surface 12 and the first intersection (edge) 24 of the back surface 14 is a BB line, the BB line is perpendicular to the front surface 12 and the back surface 14. The BB line is parallel to the AA line, and the distance between the BB line and the AA line is H.

  Next, the second work process of the present invention for cutting the workpiece 10 will be described with reference to FIG. In the second work process, the workpiece 10 in which the groove 18 is formed is mounted on the laser cutting device. The line to the left of the cutting width by the laser is CC line, the line to the right of the cutting width is DD line, and the laser cutting width (distance I between the CC line and DD line) is, for example, It shall be 0.15 mm-0.2 mm. A portion of the workpiece 10 to be cut by a laser is indicated by a cross hatched region surrounded by a CC line and a DD line in FIG. The C-C line and the DD line, which are laser cutting lines, are parallel to the AA line and the BB line.

  In the present invention, the cutting line (CC line) on the product portion 10a side by the laser cuts at any position on the inclined surface 20 formed on the product portion 10a side. That is, if the distance between the CC line and the BB line is L, L is shorter than H. The position of the C-C line at which any position of the inclined surface 20 is cut with a laser is a position for determining the product dimension. When it is desired to set the length of the distance L to a desired dimension on the basis of the position of the CC line, the position of the AA line relative to the CC line may be changed when the groove 18 is formed. The width 2H of the groove 18 is preferably larger than the cutting width I of the laser. This is to make it possible to confirm that the workpiece 10 has been cut at the position of the groove 18.

  A side view of the product portion 10a of the workpiece 10 cut by the laser is shown in FIG. In the product portion 10 a, a cut portion by a laser (CC line) is defined as a cut surface 28. This cut surface 28 becomes an outer surface of the product dimension. A crossing point between the cut surface 28 and the upper and lower inclined surfaces 20 is a second intersection (edge) 30, and an angle formed by the cut surface 28 and the inclined surface 20 is an angle θ 3. This angle θ3 is an obtuse angle. As a result, an edge composed of two first intersections 24 and two second intersections 30 is formed at a location cut by the laser placed on the product portion 10a. As described above, the angle θ2 of the first intersection (edge) 24 and the angle θ3 of the second intersection (edge) 30 are obtuse angles. For example, when the angle θ1 is a right angle, both the angle θ2 and the angle θ3 are 135 degrees. For example, if the angle θ1 is an obtuse angle slightly larger than 90 degrees, the angle θ2 is an obtuse angle slightly larger than 135 degrees, and the angle θ3 is an obtuse angle slightly smaller than 135 degrees.

  Since an edge with an angle of around 135 degrees is not sharp, even if the finger touches such an edge, the finger does not break. As described above, in the product portion 10a manufactured according to the present invention, the angles of all the edges formed in the thickness portion cut by the laser are large obtuse angles of around 135 degrees, and thus the product cut by the laser device. Even if the finger touches the portion 10a, the finger is not cut. Therefore, after processing the product portion 10a with the laser device, there is no need to perform processing operations such as file hunting, sanding, and deburring by human power.

It is sectional drawing which shows the 1st work process which concerns on this invention. It is a top view of the processed material which shows the state which formed the groove | channel. It is sectional drawing which shows the 2nd operation process which concerns on this invention. It is sectional drawing which shows the cutting location of the workpiece manufactured by this invention. It is sectional drawing which shows the cutting location of the workpiece manufactured with the conventional method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Workpiece 10a Product part 10b Removal part 12 Front surface 14 Back surface 16a Mold 16b Mold 18 Groove 20 Inclined surface 24 Edge 30 Edge

Claims (4)

In a laser cutting device that cuts a workpiece into a product part and a removal part, as a pre-process for cutting the workpiece by laser, the workpiece is inclined from both the front and back sides of the cut setting position to the product part side. A groove having a surface is formed by groove forming means, and when the groove is formed by the groove forming means, an angle of an edge between the front surface and the inclined surface and an edge between the back surface and the inclined surface The angle is an obtuse angle at which the finger does not break even if the finger touches, and then the inclined surface on the product part side is cut with a laser, and the inclined surface on the product part side is cut with a laser. A method of manufacturing a workpiece by a laser cutting device , wherein an angle of an edge between the cutting surface and the cut surface is an obtuse angle at which a finger does not break even if the finger touches it . 2. The laser according to claim 1, wherein an angle of an edge between the front surface and the inclined surface and an angle of the edge between the rear surface and the inclined surface are about 135 degrees or more. A method of manufacturing a workpiece by a cutting device. Upon cutting the inclined surface of the product portion side with a laser, according to claim 1, characterized in that the angle 135 degrees back and forth or more angular edges between the cutting surface and the inclined surface Method of manufacturing a workpiece by using a laser cutting device. 4. The method of manufacturing a workpiece by a laser cutting device according to claim 1, wherein the groove is a V-groove, and an opening angle of the V-groove is 90 degrees or an obtuse angle.

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