JPH11254164A - Manufacture of honeycomb-like panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacture of a honeycomb-like panel which is free from harmful undercut defects and which is superior in welding strength and appearance. SOLUTION: In the manufacture of a honeycomb-like panel, for which a corrugated honeycomb core 13 and two face plates 11, 12 holding the core in between are irradiated with a laser beam from the face plate side and joined together, at least one vertical wall 13' of the corrugated honeycomb core 13 is designed to form an angle of 80-90 deg. to the face plates 11, 12, and the welding is performed while moving a laser beam 14 in the direction from the other vertical wall towards the vertical wall 13'.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a honeycomb-shaped panel, and more specifically, to irradiating a corrugated honeycomb core and two face plates sandwiching the same with a laser beam from the face plate side. The present invention relates to a method for manufacturing a honeycomb-shaped panel for bonding the same.

[0002]

2. Description of the Related Art As a conventional method for manufacturing a honeycomb-shaped panel, there has been one having a structure as shown in FIG. In this prior art, a trapezoidal or S-shaped honeycomb core 3a or 3b and two face plates 1 and 2 sandwiching the same are joined by laser welding in a waveform direction.

[0003]

However, in such a conventional method for manufacturing a honeycomb-shaped panel, for example, as shown in FIG. 4, face plates 1 and 2 and a corrugated honeycomb core 3a or 3b are formed. There is a problem that undercut defects 6a or 6b are generated in a portion where the gap starts to open, and the strength is insufficient and the film is easily peeled.

The present invention has been made in view of such conventional problems, and the angle of at least one vertical wall of the corrugated honeycomb core is set to 80 to 90 degrees with respect to the face plate. It is an object of the present invention to solve the above problem by a manufacturing method in which a laser beam is moved from the other vertical wall side toward the vertical wall side and joined.

[0005]

According to the present invention, in order to solve the above-mentioned problems, a corrugated honeycomb core and two face plates sandwiching the same are irradiated with laser from the face plate side to join the face plate and the honeycomb core. In the method for manufacturing a honeycomb-shaped panel, the angle of at least one vertical wall of the corrugated honeycomb core is set to 80 to 90 degrees with respect to the face plate, and the other vertical wall side is directed toward the vertical wall side. The method is characterized in that the bonding is performed while moving the laser beam from above, and the method for manufacturing such a honeycomb-shaped panel is a means for solving the above-mentioned conventional problems.

Hereinafter, the operation of the present invention will be described. By using the means according to the present invention, it is possible to produce a honeycomb-shaped panel which is free from harmful undercut defects and excellent in welding strength and appearance. This is because by making the vertical wall of the honeycomb core as perpendicular as possible, there is no gap between the face plate and the honeycomb core, and the occurrence of harmful undercut defects is suppressed. If the angle of the vertical wall of the honeycomb core is 80 degrees or less, about 30% or more of the thickness of the face plate is dented, and the welding strength is insufficient, which causes peeling. Also, 9
If the angle is 0 degrees or more, the strength of the honeycomb panel becomes insufficient.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the method for manufacturing a honeycomb-shaped panel according to the present invention will be specifically described below based on examples. 1A is a sectional view showing a honeycomb core shape according to the present invention, FIG. 1B is an enlarged view of the honeycomb core shape sectional view shown in FIG. 1A, and FIG. 1C is an external shape of a honeycomb panel according to the present invention. FIG. FIG.
FIG. 4 is a diagram illustrating a relationship between an undercut amount and a honeycomb core vertical wall angle.

[0008] As an example honeycomb core 13, using a low carbon steel sheet having a thickness of 0.3 mm. From the results of the investigation of the angle between the face plate and the vertical wall of the honeycomb core and the amount of undercut shown in FIG. 2, as shown in FIG. 1B, the angle of the vertical wall 13 ′ of the honeycomb core 13 is On the other hand, a honeycomb core 13 of 90 degrees was manufactured, and a low-carbon steel plate having a thickness of 1.0 mm was placed as a face plate 11 and a face plate 12 above and below the honeycomb core. Then, using a YAG laser (not shown) having a maximum output of 3 kW, welding was performed while moving the laser beam 14 from left to right in all the welding beads 15 as shown in FIG. At the time of this laser welding, argon gas was used as a shielding gas, and a laser output of 2 kW, a focal length of a condenser lens of 100 mm, and a processing speed of 3.0 m / min were adopted.

[0009]

As described above in detail, according to the present invention, a corrugated honeycomb core and two face plates sandwiching the corrugated honeycomb core are irradiated with laser from the face plate side to join the face plate and the honeycomb core. In the method for manufacturing a honeycomb-shaped panel, the angle of at least one vertical wall of the corrugated honeycomb core is set to 80 to 90 degrees with respect to the face plate, and toward the vertical wall side, from the other vertical wall side. By joining while moving the laser beam, the gap between the face plate and the honeycomb core is minimized, the occurrence of harmful undercut defects is eliminated, and it is possible to manufacture a honeycomb-shaped panel excellent in welding strength and appearance. it can.

[Brief description of the drawings]

1A is a sectional view showing a honeycomb core shape according to the present invention, FIG. 1B is an enlarged view of the honeycomb core shape sectional view shown in FIG. 1A, and FIG. 1C is an external view of a honeycomb panel according to the present invention; It is a perspective view which shows a shape.

FIG. 2 is a diagram illustrating a relationship between an undercut amount and a honeycomb core vertical wall angle.

FIG. 3 is a cross-sectional view showing a honeycomb core shape of a conventional honeycomb panel.

FIG. 4 is an explanatory view showing a honeycomb core shape and an undercut defect of a conventional honeycomb panel.

[Description of Signs] 11 Upper surface plate 12 Lower surface plate 13 Honeycomb core 13 'Vertical wall of honeycomb core 14 Laser beam 15 Weld bead

Claims (1)

[Claims] 1. A method for manufacturing a honeycomb panel in which a corrugated honeycomb core and two face plates sandwiching the honeycomb core are irradiated with laser from the face plate side to join the face plate and the honeycomb core. The angle of at least one vertical wall of the honeycomb core is set to 80 to 90 degrees with respect to the face plate, and the honeycomb core is joined while moving a laser beam from the other vertical wall toward the vertical wall. A method for manufacturing a honeycomb-shaped panel.