JP5995515B2 - Manufacturing method of profile - Google Patents

Description

The present invention relates to a method for manufacturing a shape member subjected to twisting.

  Conventionally, there has been a technique of twisting a hollow part filled with sand or the like with respect to a hollow shape having a symmetrical cross-sectional shape. However, there is no technique for twisting easily and inexpensively without protrusions or flat hollow shapes, and the hollow parts are not crushed.

SUMMARY OF THE INVENTION In view of the circumstances described above, the present invention has an object to provide a method of manufacturing a shape member that can be easily and inexpensively twisted without collapsing the hollow portion even if there is a protrusion or a flat hollow shape. To do.

In order to achieve the above object, a method for producing a profile according to the first aspect of the present invention comprises: a hollow portion having a substantially circular inner periphery; an opening made of a pair of fins on both sides of the hollow portion; A flat surface continuous to the outer peripheral side of the opening, the center of the hollow portion coincides with the cross-sectional center of the shape member, and the wall thickness between the hollow portions between the fins gradually toward the fin base a longitudinal portion thickened by the profile and to, wherein the Ru screw the center of the hollow portion as an axis. The shape of the inner periphery of the hollow portion may be a perfect circle, a polygon (for example, an octagon) close to a circle, or a somewhat elliptical shape.

The method for manufacturing a profile according to the invention of claim 2 has a hollow part and openings formed of a pair of fins on both sides of the hollow part, and the center of the hollow part coincides with the cross-sectional center of the profile . The hollow part and the opening part of the shape member are filled with fillings and twisted around the center of the hollow part. The filling material to be filled in the hollow portion may be any material that can be filled without a gap and does not deform even when twisted, but sand or a low-melting-point alloy is preferable so that it can be easily taken out after being twisted. The filling material to be filled in the opening may be any material that follows the deformation and has a property of being hardly deformed by a compressive load.

According to the first aspect of the present invention, there is provided a method of manufacturing a profile, comprising: a hollow portion having an inner circumference that is substantially circular; an opening made of a pair of fins on both sides of the hollow portion; A profile in which the center of the hollow portion coincides with the center of the cross section of the profile, and the thickness between the hollow portions between the fins gradually increases toward the fin base . By twisting a part of the longitudinal direction around the center of the hollow part, it is possible to prevent the hollow part from collapsing without filling the hollow part with sand or the like, and there are protrusions or a flat hollow shape. However, the hollow portion can be easily twisted without being crushed. Since it is not necessary to pack sand etc. in a hollow part, cost can be reduced. Since it has the opening part which consists of a pair of fin in the both sides of a hollow part, when it twists, a twist will be emphasized with a fin and the design property will improve. Further, when the shape material is embedded in the ground and standing, the presence of the fin increases the stability as compared with the case without the fin. Further, the fin portion can be used as a base for mounting parts such as a nameplate, and the use of the shape material is expanded.

The method for manufacturing a profile according to the invention of claim 2 has a hollow part and openings formed of a pair of fins on both sides of the hollow part, and the center of the hollow part coincides with the cross-sectional center of the profile. Filling the hollow part and the opening of the profile with the filling and twisting around the center of the hollow part can prevent the hollow part from collapsing, and the fins can be deformed neatly. Even in the hollow shape, the hollow portion can be easily twisted without being crushed. Since it has the opening part which consists of a pair of fin in the both sides of a hollow part, when it twists, a twist will be emphasized with a fin and the design property will improve. Further, when the shape material is embedded in the ground and standing, the presence of the fin increases the stability as compared with the case without the fin. Further, the fin portion can be used as a base for mounting parts such as a nameplate, and the use of the shape material is expanded.

It is sectional drawing of the profile which concerns on 1st Embodiment of this invention. It is sectional drawing of the profile which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the state when twisting the profile of 2nd Embodiment. It is a figure which shows a mode when shape-processing a shape material, Comprising: (a) is the state before twisting, (b) shows the state after twisting. It is an example of the use condition of the profile which gave the twist process of this invention, Comprising: It is a figure which shows the case where it uses for a functional pole. It is a figure which shows the comparison of a cross section when performing a twist process about the square pipe and the shape material of 1st Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a cross-sectional shape of a profile 1 according to the first embodiment of the present invention. The profile 1 is an aluminum alloy extruded profile having a hollow portion 2 with a circular inner periphery at the center, and openings 4 made of a pair of fins 3 and 3 on the left and right sides of the hollow portion 2. However, it has a flat H-shaped cross section as a whole. The center O of the hollow portion 2 coincides with the cross-sectional center of the profile 1. The profile 1 is twisted around the center O of the hollow portion 2 to obtain a product.

  The twisting procedure will be described. As shown in FIG. 4 (a), both sides of the portion to which the shape 1 is to be twisted are held by being sandwiched between two divided wooden molds 5a and 5b, and the wood on both sides is held. The molds 5a and 5b are held by a holding part (not shown) of the twisting machine. Next, as shown in FIG. 4B, one of the wooden molds 5a and 5b is fixed, and the other wooden mold 5a and 5b is rotated about the center O of the hollow portion 2 of the profile 1 as an axis. Thereafter, when the gripping part is released and the wooden molds 5a and 5b are removed, the profile 1 in which the intermediate part is twisted by a predetermined angle is obtained. The twisting of the profile 1 may be performed using a dedicated twisting machine, but can also be performed using a twist straightening machine that is an existing facility in an aluminum extruded profile manufacturing plant.

  As described above, the profile 1 has the hollow part 2 having a circular inner periphery at the center of the cross section, and twists around the center O of the hollow part 2 as an axis, so that the hollow part 2 can be twisted cleanly without being crushed. Since it is not necessary to pack the sand or the like in the hollow portion 2, the cost of sand or the like is not required, and the trouble of packing or unloading the sand or the like is eliminated, so that the twisted profile 1 can be provided at a low cost. It becomes possible.

The reason why the hollow portion 2 can be neatly twisted without being crushed even when the hollow portion 2 is not filled with sand or the like when the inner periphery of the hollow portion 2 is circular is considered.
As shown in FIG. 6A, when the square pipe 90 is twisted around the center O, buckling due to shear stress occurs inside, and the surrounding walls are crushed and deformed.
On the other hand, as shown in FIG. 6 (b), when the profile 1 of the first embodiment is twisted around the center O of the hollow portion 2, the inner periphery of the hollow portion 2 is circular. Is a state of simple shearing, only shearing stress is generated, and the radial line OA only undergoes rotational displacement, so that crushing deformation in the direction of the central axis is suppressed, and the wall from the center of the vertical and horizontal walls to the intersecting part is suppressed. Since the thickness is thick (the portion surrounded by the dotted line in the figure), buckling deformation can be suppressed, and it is considered that the hollow portion 2 is twisted cleanly without being crushed.

FIG. 5 is an example of a usage state of the profile 1 according to the first embodiment, and is applied to a function pole 6 installed in an approach or the like in front of a house entrance. The function pole 6 has an intermediate portion twisted by about 45 °, a mailbox 7 attached to the lower side of the twisted portion, and an interphone 8 and a nameplate 9 attached to the upper side of the twisted portion.
As described above, the shape member 1 of the first embodiment has the fins 3 on both sides of the hollow portion 2, whereby the twist is emphasized by the fins 3 and the design is improved. Moreover, although the functional pole 6 is constructed by burying the lower part in the ground, the presence of the fin 3 makes the stability higher than that without the fin 3. Furthermore, the portion of the fin 3 can be used as a base for attaching the nameplate 9 and the like, and the use of the profile 1 is expanded.

  FIG. 2 shows a cross-sectional shape of the profile 1 according to the second embodiment of the present invention. The profile 1 is an aluminum alloy extruded profile having a hollow portion 2 having a rectangular inner periphery at the center, and openings 4 formed of a pair of fins 3 and 3 on the left and right sides of the hollow portion 2. However, it has a flat H-shaped cross section as a whole. The center O of the hollow portion 2 coincides with the cross-sectional center of the profile 1. The profile 1 is twisted around the center O of the hollow portion 2 to obtain a product.

As shown in FIG. 3, twisting of the profile 1 according to the second embodiment is performed by filling the hollow portion 2 with sand 10 and filling the opening 4 with a highly elastic resin material or a low melting point alloy. In the illustrated example, the polyethylene plate 11 is laminated and filled as the highly elastic resin material in the opening 4, but it is not always necessary to laminate and fill the plate-like material, and it may be a lump-like material. . In the case of a low melting point alloy, a plate-shaped material may be laminated and filled, or a massive material may be filled.
After the twisting of the profile 1 is finished, the sand 10 packed in the hollow portion 2 and the polyethylene plate 11 packed in the opening 4 are extracted.
The filling to be filled in the hollow portion 2 may be a low melting point alloy. In this case, after the twisting process is finished, the low melting point alloy can be easily extracted by heating to melt the low melting point alloy.

  The shape member 1 of the second embodiment can prevent the hollow portion 2 from being crushed by filling the hollow portion 2 with sand 10 when twisted, and the opening portion 4 is filled with the polyethylene plate 11 and twisted. Thus, the polyethylene plate 11 is deformed following the twist, and the fin 3 is twisted neatly without falling inward. Moreover, since it has the fin 3 on both sides of the hollow part 2 similarly to the thing of 1st Embodiment, a twist is emphasized by the fin 3, and the designability improves. Further, the presence of the fins 3 increases the stability when the profile 1 is embedded in the ground and standing. Moreover, the part of the fin 3 can be used as a base for attaching various parts, and the use of the shape material is expanded.

  As described above, the shape member 1 of the present invention can be easily twisted by preventing the hollow portion 2 from being crushed even if it has fins 3 or has a flat hollow shape. In the first embodiment, it is not necessary to pack sand or the like in the hollow portion 2, and in the second embodiment, the amount of sand 10 or the like packed in the hollow portion 2 can be reduced, so that the cost required for twisting can be suppressed.

  The present invention is not limited to the embodiments described above. Regarding the first embodiment (the invention according to claim 1), the shape of the inner periphery of the hollow portion may be a polygon (for example, an octagon) close to a circle or a somewhat oval shape in addition to a perfect circle. Regarding the second embodiment (the invention according to claim 2), the material of the filling to be filled in the hollow portion and the opening is not particularly limited, and the filling to be filled in the hollow portion can be filled without any gaps, and does not deform even when twisted. In addition to sand or a low-melting-point alloy, it may be an incompressible fluid such as water, and the filling filled in the opening portion has a characteristic that follows deformation and has little deformation due to a compressive load. I just need it. Further, the filling to be filled in the hollow portion and the opening portion may be filled over the entire length in the longitudinal direction of the shape member, or may be partially filled only in the twisting range. In any of the inventions, the twisting angle is arbitrary, and the twisting angle may be 90 ° or more. The cross-sectional shape of the profile is not limited to that of the first and second embodiments, and can be changed as appropriate. For example, the opening made of a pair of fins can be provided above and below the hollow portion in addition to the left and right sides of the hollow portion. The material is not limited to aluminum, and may be a magnesium alloy, for example. The use of the profile of the present invention is not particularly limited and can be used in various fields.

DESCRIPTION OF SYMBOLS 1 Profile 2 Hollow part 3 Fin 4 Opening part 10 Sand (stuffing)
11 Polyethylene plate (padded)
O Center of hollow part

Claims (2)

The hollow portion has a substantially circular inner periphery, an opening made of a pair of fins on both sides of the hollow portion, a hollow portion and a flat surface continuous to the outer peripheral side of the opening portion, and the center of the hollow portion is the shape member Screw a part of the longitudinal direction of the profile that coincides with the center of the cross-section and gradually increases in thickness between the fins toward the fin bases around the center of the hollow part method for producing a profile, characterized in that that. A hollow part and an opening made of a pair of fins on both sides of the hollow part, and the filling of the hollow part and the opening part of the profile whose center coincides with the cross-sectional center of the profile A method for producing a profile, characterized by twisting about the center of the hollow part.

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