JPH0119966B2 - - Google Patents

Description

[Detailed description of the invention]

[Object of the Invention] (Industrial Field of Application) The present invention relates to a method of forming a joint surface of a corner portion of a shape used for, for example, a sash, handrail, fence, etc. (Prior Art) Conventionally, as shown in FIG. 7, for example, as shown in FIG. 100c close to the other side wall 100d, and then, as shown in FIG. 8, the side wall 100d of the profile 100 is
There was one in which the corner portion 101 was formed by bending. (Problems to be Solved by the Invention) However, in the above-described method of forming a joint surface of a shaped material, the shaped material must be transported in a bent and formed state. Another problem was that it was extremely disadvantageous in terms of workability and was unsuitable for assembly-type or large-sized products. This invention was made by focusing on the above-mentioned conventional problems, and it has been developed to create a shape that is advantageous in terms of transportation, storage, and work, and can also be used for assembly-type and large-sized products. The purpose of this invention is to provide a method for forming a bonding surface. [Structure of the Invention] (Means for Solving the Problems) The method for forming a joint surface of a shape member according to the present invention is a method for forming a joint surface of a shape member, which has a cross-sectional section consisting of a vertical wall and a horizontal wall, and is formed by cutting at an arbitrary angle. In the method for forming joint surfaces of shapes in which a corner portion is formed by abutting separate shapes having joint surfaces, a continuous shoulder between a vertical wall and a horizontal wall of the shape is curved, and the vertical wall is placed on the side of the horizontal wall. After bending by pressing, the shape is cut at an angle corresponding to the angle of the corner part formed by butting and along a cutting line that passes through the curved part of the vertical wall to form a joint surface of a predetermined angle. It is a feature. (Example) FIGS. 1 to 6 are diagrams showing an example of the method for forming a joint surface of a profile according to the present invention. In FIG. 1, a vertical wall 1a and a horizontal wall 1b form a roughly shaped section, and the vertical wall 1a' faces the vertical wall 1a, and a horizontal wall 1b' faces the horizontal wall 1b. Also shown is a profile 1 having a rectangular hollow cross section with a curved shoulder portion 1e in which the vertical wall 1a and both horizontal walls 1b, 1b' are continuous. The ends are cut at a 90 degree angle. Next, as shown in FIG. 2, a curved portion 1a'' is formed by bending the vertical wall 1a into a curved shape so that its tip edge faces the other vertical wall 1a'. 6 is a diagram illustrating an example of a press mold that can be used to form the curved portion 1a'' shown in FIG. 2 in the method for forming a joint surface of a profile according to the present invention. This press mold is designed to bend the profile 1 with the vertical walls 1a, 1a' placed vertically and the shoulder 1e placed on the upper side. The press mold includes a base 15 on which the profile 1 is placed, an inner holder 16 inserted into the inner cavity of the profile 1, two outer holders 17 along both sides of the profile 1 (lateral wall outer surface), 17, and a punch 18 that can move up and down. The inner holder 16 has a cross section corresponding to the inner cavity of the section 1, and has the bent portion 1 at its end.
The punch 18 has a forming surface 16a corresponding to the inner surface shape of the curved portion 1a'' on its lower surface.
8a. In addition, since the forming surface 18a of the punch 18 is curved in the bending direction of the vertical wall 1a and the curving direction of the shoulder portion 1e, the forming surface 18a is larger than the vertical wall 1a of the section 1 due to the structure in which the forming surface 18a is provided. It has a width dimension. Therefore, the outer holders 17, 17 hold the punch 18 which has reached the bottom dead center position.
It has become a form that does not come into contact with the body. The above press mold has inner and outer holders 1
6, 17 to hold the horizontal walls 1b, 1b' of the profile 1, press and fix the unprocessed portion of the upper surface of the vertical wall 1a with a presser (not shown) if necessary, and lower the punch 18. A bent portion 1a'' is formed between the molding surface 18a and the molding surface 16a of the inner holder 16. At this time, the bent portion 1a''
e has a curved shape, and the horizontal walls 1b and 1b' are held by the inner and outer retainers 16 and 17, so that the vertical wall 1a and a part of the horizontal walls 1b and 1b' that are continuous with the vertical wall 1a is curved and bent so that it slightly protrudes from the end of the profile 1. The bent portion 1a'' formed in this way is the shoulder portion 1e.
Since the shoulder portion 1e is curved, the shoulder portion 1e is easily bent along the molding surfaces 16a and 18a, and the strain occurring in the bent portion 1a'' is suppressed to a small level. Since the curvature is considerably smaller than that of the curved section 1a'' (see Figure 8), there is no need to worry about buckling of the section itself that would degrade its appearance. The degree of distortion increases towards the ends of 1b and 1b', and in some cases deformation such as wrinkles may occur in these parts, but these parts will be removed by the cutting line described later. There are no problems with the product. Next, as shown in FIG. 4, which will be described later, the sections 1,
Since the angle of the corner formed by butting the two pieces together is a right angle, it is cut along the cutting line 1c having an angle of 45 degrees as shown in Fig. 2, but the tip of the bent vertical wall 1a The cutting line is made to pass through the bent portion 1a'' while avoiding 1d. Next, the joint surfaces 2d of the shape member 1 and the shape member 2 having the linear joint surface 1d shown in FIG. In the above embodiment,
The explanation has been given using the example of forming a 90° corner part, but if the corner angle is 90° or more, for example about 120° as a practical corner angle, the curvature will be further reduced, so the curved part This makes molding even easier, and it is possible to obtain even better products.

【Effect of the invention】

As explained above, according to the method for forming a joint surface of a profile according to the present invention, separate In the method for forming a joint surface of a section in which the sections are butted against each other to form a corner part, after the continuous shoulder of the vertical wall and the horizontal wall of the section is curved and the vertical wall is bent toward the horizontal wall by pressing. By cutting the shape along a cutting line that corresponds to the angle of the corner part formed by butting and passing through the curved part of the vertical wall, the shape has a structure in which a joint surface of a predetermined angle is formed. It is advantageous in terms of transportation, storage, and work because it can be handled individually, and it is also easy to apply to assembled or large-sized products. Compared to other methods, the corner protrusion is less likely to shift due to errors in angle cutting, and since there are no sharp parts, there is no danger to the human body. This provides an excellent effect in that the protruding corner portion of the corner portion can be made into a curved shape that looks good in appearance, and the design balance after assembly can be made good.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a section in an embodiment of the method for forming a joint surface of a section according to the present invention, FIG. 2 is a plan view of the section after bending, and FIG. 3 is a section after forming the joint surface. 4 is a plan view of a corner portion, FIG. 5 is a front view illustrating an example of a press die applicable to the bonding surface forming method of the present invention, and FIG. 6 is a plan view of A shown in FIG. 5. 7 and 8 are plan views showing a conventional method for forming joint surfaces of shapes. 1, 2... Profile, 1a, 1a'... Vertical wall, 1a''...
...Curved part of vertical wall, 1b, 1b'...Horizontal wall, 1c
... Cutting line, 1d ... Joint surface, 1e ... Shoulder, 1
0...Corner section.

Claims (1)

[Claims] 1. A method for forming a joint surface of a shape member, in which a corner portion is formed by butting together separate shapes having a generally shaped cross-sectional portion consisting of a vertical wall and a horizontal wall, and having a joint surface formed by cutting at an arbitrary angle, The continuous shoulder of the vertical wall and the horizontal wall of the section is curved, and the vertical wall is pressed toward the horizontal wall, and then the vertical wall is bent at an angle corresponding to the angle of the corner formed by abutting against each other. 1. A method for forming a joint surface of a shape material, the method comprising: forming a joint surface at a predetermined angle by cutting the shape material along a cutting line that passes through the material.