JPH0459101A - Manufacture of rolled shape excellent in surface skin - Google Patents

Abstract

PURPOSE:To manufacture a shape excellent in the surface skin by making into a bending formed shape and cold rolling it after grinding the surface of one side of an intermediate shape of which the cross section is flatter than the final section. CONSTITUTION:A billet is hot rolled and the intermediate shape 1 which is flatter than the final cross section with one intermediate side part 2 and the other side part 3 is formed. The surface of improved skin is made by grinding the surface of one side of the intermediate shape 1 with a surface treating member and, subsequently, a formed shape is made by bending one intermediate side part 2 and the other intermediate side part 3 into a near shape to the final cross section and the surface of improved skin is cold rolled. In this way, the surface roughness of the surface of improved skin is made smaller and the rolled shape excellent in the surface skin can be manufactured.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to an angle material, a channel material, etc., which has at least one side in its cross section and the other side that intersects the one side at a predetermined intersection angle. This invention relates to a method for producing rolled sections with excellent surface texture and cross-sectional shapes.

[Conventional technology] In recent years, rolled shapes such as angle materials and channel materials are
There is a growing demand for better surface skin. Particularly in the field of architecture, good surface texture, for example, mirror-like texture, is increasingly required for decorative purposes.

However, improving the surface texture is not necessarily easy with mass-produced products. This is particularly difficult when using materials such as stainless steel, which have low deformability and are easily sewn.

For this reason, conventionally, the surface skin has been subjected to pickling treatment, and the user has polished the pickled wash more than 10 times to give it a mirror-like finish. Products that have been hot-rolled and pickled usually have surface defects called surface defects, and the worst of these defects are over 100 microns, making it difficult to remove by polishing. The disadvantage of using angle and channel materials is that they are expensive.

By the way, for flat rolled materials with flat top and bottom surfaces, which are different from angle materials and channel materials, the exposed surface of the hot-rolled intermediate section is polished with a grindstone, and then the polished surface is applied to the roll surface of the rolling roll. A method of cold rolling is known.

[Problems to be Solved by the Invention] However, if the method used for the above-mentioned flat plate-shaped rolled materials is applied directly to the manufacture of angle materials and channel materials, the angle materials and channel materials are irregularly shaped compared to flat plates, so It is not easy to reliably apply the whetstone to irregularly shaped parts.

The present invention has been made in view of the above-mentioned circumstances, and its object is to provide a method for manufacturing rolled shaped materials such as angle materials and channel materials with good surface texture.

[Means for Solving the Problems] As a result of extensive research, the present inventor has found that the intermediate profile can be created while maintaining the intermediate profile in a shape that is easy to polish and grind, that is, in a state where the shape is in the same plane. The present invention was completed based on the idea that it would be sufficient to polish or grind the surface of the material.

The method of manufacturing a rolled section with excellent surface texture according to the present invention produces a final cross-sectional shape having at least one side in a cross-section perpendicular to the longitudinal direction and the other side that intersects the one side at a predetermined intersection angle. It is a method of manufacturing a rolled metal shape extending in the length direction, with one middle side and the other middle side forming the same plane in cross section or intersecting at an angle different from the set intersection angle. At least one surface in the thickness direction of the intermediate section is surface-treated using a metal intermediate section that has at least a flat cross-sectional shape and a surface treatment member that grinds or polishes the intermediate section. A step of grinding or polishing with a member to make at least one surface of the intermediate section a skin-improved surface, and converting one intermediate side and the other intermediate side of the intermediate section having the skin-improving surface to the final cross-sectional shape or A step of bending the molded shape into a shape similar to the final cross-sectional shape to obtain a molded shape, and a step of cold rolling the skin-improved surface of the molded shape with a rolling roll to further reduce the surface roughness of the skin-improved surface are performed in order. It is characterized by the fact that it is carried out.

In the method of the present invention, the final product, the rolled shape, has a final cross-sectional shape in a cross section perpendicular to its longitudinal direction, which has at least one side and the other side that intersects the one side at a predetermined intersection angle. It extends in the length direction. Here, the set intersection angle is the intersection angle between one side and the other side, and is substantially 90 degrees in the case of angle material and channel material.

The intermediate profile used in the present invention has a cross section that is so shaped that it lies on the same plane, or has at least one intermediate side and the other intermediate side that intersect at an angle different from the above-described intersection angle of the final product. The cross-sectional shape is more flat than the final cross-sectional shape. The intermediate member can be in the form of a rod or a continuous coil having a predetermined length.

The material of the intermediate section used in the present invention can be selected as appropriate, and may be hot-rolled, cold-rolled, or warm-rolled; specifically, stainless steel (for example, 5US304.316)
, carbon steel, titanium, other alloys, etc.

The surface-treated member used in the method of the present invention is used to polish or grind an intermediate profile. The surface treatment member can be appropriately selected depending on the type of rolled shape material that is the final product, and for example, a grindstone, a peeling tool, a puff, and in some cases, a sandpaper, a projected shot, or a grid can be used. In the case of a grindstone, it is preferable to make the shape as similar to the cross-sectional shape of the intermediate section as possible. For example, an alumina-based grindstone, a silicon carbide thread, or a diamond-based grindstone can be used.

The shots and grids are preferably fine in order to reduce the surface roughness of the skin-improved surface.

When polishing or grinding the surface of the intermediate section to be used with the surface-treated member, it may be in a hot state, a cold state, or a warm state.

In addition, when polishing or grinding the surface of an intermediate section, the surface roughness of the surface improved surface of the intermediate section can be selected as appropriate depending on the type of rolled section that is the final product.In general, RZ So 5~
It can be about 100 μm, especially about 20 to 50 μm.

When the surface with improved texture polished or ground as described above is cold rolled with a rolling roll, the hardness of the surface increases. Therefore-
For boat fishing, the shaped material is placed in a heat treatment furnace in a non-oxidizing atmosphere (inert scum, nitrogen gas, vacuum, etc.) and annealed while suppressing the formation of an oxide film. Note that the heat treatment temperature and heat treatment time can be selected as appropriate.

[Function] The intermediate section has a shape that is close to the same plane in cross section, or has at least one intermediate side and the other intermediate side that intersect at an angle different from the above-mentioned set intersection angle of the final product,
It is more flat than the final cross-sectional shape.

Therefore, it becomes easier to apply a surface treatment member such as a grindstone to the intermediate section, and surface finishing treatments such as polishing and grinding become better. Therefore, even if an oxide film is formed on the intermediate profile, the oxide film can be easily and reliably removed.

[Example] A first example of the method for manufacturing a rolled section according to the present invention will be described with reference to FIGS. 1 to 6.

This method is an example applied to stainless steel I (SUS304) angle material.

First, a billet made of stainless steel with a rectangular cross section (for example, 110 mm in width and 110 mm in thickness) and a rough rolling roll group consisting of a large number of rough rolling rolls having predetermined groove-shaped calibers are used. 100
The material is heated to about 0'C and hot-rolled sequentially using a group of rough rolling rolls, thereby forming an intermediate section 1 having the shape shown in FIG. 1. An oxide film is formed on this intermediate section 1.

The intermediate profile 1 has a wall thickness of approximately 6 mm, has one intermediate side portion 2 and the other intermediate side portion 3, and is more flat than the final cross-sectional shape. Between one intermediate side portion 2 and the other intermediate side portion 3, there is a groove portion 4 extending in the length direction of the intermediate section 1, and a protrusion portion 5.
is formed. Note that the groove portion 4 has inclined surfaces 4a and 4b. The protrusion 5 has inclined surfaces 5a and 5b. The valley part of the groove part 4,
The top of the protrusion 5 can be selected as appropriate, and may be rounded or sharp.

Then, the first whetstone 6 and the inclined surface 7a shown in FIGS. 2 to 4
, 7b, and a third grindstone 10 having a ring protrusion 9 with inclined surfaces 9a, 9b are used to polish the intermediate section 1. At this time, the temperature of the intermediate section 1 is about room temperature to 600'C. That is, as shown in FIG. 2, the end surface 11 in the width direction of the intermediate section 1 is polished with the first grindstone 6, and the end surface 11 is made into a polished surface as a surface-improved surface.

Next, as shown in FIG. 3, one side 12 in the thickness direction of the intermediate section 1 is polished with a second grindstone 8, thereby removing the oxide film and making the one side 12 a polished surface as a surface-improved surface. . At this time, the ring groove 7 of the whetstone 58 is applied to the protrusion 5 of the intermediate section 1 while the inclined surfaces 7a, 7b are facing the inclined surfaces 5a, 5b.

Next, as shown in FIG. 4, the other side 13 in the thickness direction of the intermediate section 1 is polished with a third grindstone 10, thereby removing the surface layer such as oxide scale of the intermediate section 1, and polishing the other side 13 of the intermediate section 1 in the thickness direction. 13
Let be the polished surface as the surface-improved surface. At this time, the inclined surface 9
While a and 9b are facing the inclined surfaces 4a and 4b, grindstone]0
Apply the ring protrusion 9 to the groove 4 of the intermediate section 1.

The surface roughness of the polished surface is about 10 to 20 μm in RZ. In this embodiment, the presser roll 14 is used to suppress wobbling of the intermediate section 1 during polishing. The material of the presser roll 14 is urethane rubber for reasons such as preventing damage to the grindstone 6.8.10. Note that the above-mentioned grindstones 6.8.10 are resinoid-based grindstones.

Next, as shown in FIG.
The end 2f of the intermediate side 2 and the other intermediate side 3 are attached to the hole mold 17a.
While fitting and rolling the end portions 3f of the intermediate section 1, one intermediate side section 2 and the other intermediate side section 3 of the intermediate section 1 are bent to form a substantially angular shape approximating the final cross-sectional shape to obtain a formed section 20. . Here, there are roll traces of the drum-shaped roll 16 at the end of the tip-shaped roll 15, and parts 20a, 20b, 20C1 of the molded material 20.
The flatness of 20d decreases.

Next, as shown in FIG. 6, a three-way roll device consisting of flat rolls 21, 22 and barrel-shaped rolls 23 is used to form a shaped shape on the roll surface 21a of the flat roll 21 and the roll surface 23a of the barrel-shaped roll 23. The polished surface of No. 20 is cold rolled. As a result, the roll marks at the above-mentioned portions 20a to 20d are eliminated, and the minute irregularities on the polished surface are soaked, so that the surface roughness of the polished surface becomes extremely small, approximately 0.3 to 1.5 μm in RZ, and therefore the polishing The surface becomes a mirror surface.

The roll surfaces 21a and 22a of the flat rolls 21 and 22 and the roll surface 23a of the roll 23 are precisely polished. If such a three-way roll device shown in FIG. 6 is used, the surfaces of one side 24 and the other side 25 of the shaped section 20 will be even better. The reason is that the circumferential speed of the roll surfaces 21a and 22a is the same everywhere due to the weekday roll 21.22, and therefore, in the molded side 24 of the molded section 20, the end side portion 24a and the boundary side portion 24b This is because the circumferential velocities of the two can be matched or approximated. The same applies to the other side portion 25 of the molding. Cold rolling increases the hardness of the surface of the molded shape 20, so the molded shape 20 is charged into a heat treatment furnace with an argon gas atmosphere and heated at 700 degrees Celsius for 30 minutes while suppressing the formation of an oxide film. Perform annealing treatment.

By the way, in the first embodiment described above, as shown in FIG.
However, the present invention is not limited to this, and the grindstone 3 having an inclined surface 30a at the tip as in the second embodiment shown in FIGS. 7 and 8.
0 and another grindstone 31 having an inclined surface 31a at the tip, and as shown in FIG. Polished and also provided with an inclined surface 31 at the tip, as shown in FIG.
It is also possible to polish only the other intermediate side portion 3 of one side 12 of the intermediate section 1 with another grindstone 31 having a diameter of 1. In addition, the grindstone 10 with the ring protrusion 9 used in the first embodiment described above
In the case of

Further, as in the third embodiment shown in FIGS. 9 and 10, a disc-shaped grindstone 33 having an inclined surface 33a and a cylindrical surface 34 are used.
As shown in FIG.
As shown in the figure, the flat surface of one side 12 of the intermediate section 1 may be polished using the cylindrical surface 34a of the cylindrical grindstone 34.

In addition, as in the fourth embodiment shown in FIGS. 11 and 12,
A grindstone 36 having a ring groove 35 with an inclined surface 35a;
A cylindrical grindstone 38 having a ring groove 37 is used to grind both inclined surfaces 5a and 5b of the protrusion 5 of the intermediate section 1 with the ring groove 35 of the grindstone 36, and as shown in FIG. The remaining flat surface of one side 12 of the intermediate section 1 may be polished using the grindstone 38.

Next, a fifth embodiment in which the present invention is applied to manufacturing a channel material will be described based on FIGS. 13 to 22. The main part of the method of the fifth embodiment has basically the same structure as the main part of the first embodiment.

This intermediate section 40 is made of stainless steel (SUS304) with a wall thickness of about 6 mm, and in its cross section, the middle side 41
, an intermediate other side portion 42 and an intermediate connecting portion 43 connecting the two, and a protrusion 5 and a groove 4 in the boundary area between them. As shown in FIG. 13, this intermediate section 40 is more flat than the final cross-sectional shape of the channel.

In the fifth embodiment, similarly to the first embodiment, a billet made of stainless steel and having a rectangular cross section (for example, a width of 110 mm) is used.
mm, thickness 110 mm>, and a rough rolling roll group consisting of a large number of rough rolling rolls having a caliber with a predetermined groove shape, and with the billet heated to about 1000°C, the rough rolling roll group sequentially heats the billet. The first
An intermediate section 40 having the shape shown in FIG. 3 is formed.

Then, although not shown, the end surface 44 of the intermediate section 40 in the width direction is polished using a grinding wheel or a cutting tool in the same manner as in the first embodiment. Furthermore, as shown in FIG. 14, the grinding surface of the grindstone 8 is applied to one surface 45 in the thickness direction of the intermediate section 1, and the one surface 45 of the intermediate section 40 is used as a polishing surface. At this time, the ring groove 7 is brought into contact with the protrusion 5. Furthermore, as shown in FIG. 15, the grinding surface of the grindstone 10 is applied to one surface 46 of the intermediate section 1 in the thickness direction, and the one surface 46 of the intermediate section 1 is used as a polishing surface. do. At this time, the ring protrusion 9 is applied to the groove 4. Then, as shown in FIG. 16, by using a wrap-shaped roll 50, a groove-shaped roll 51, and a barrel-shaped roll 52, an end 41f of one intermediate side 41 of the intermediate section 40 and an end 42f of the other intermediate side 42 are used. The groove 53 of the groove roll 51
The intermediate section 40 is formed into a shape approximating the rWJ by rolling while fitting the intermediate section 40 into a shape similar to rWJ. The groove 53 of this groove roll 51 is the first
As shown in FIG. 7, it has a side surface 53a that becomes slightly open toward the opening, and a bottom surface 53b that has an arcuate convex shape.

FIG. 18 shows an enlarged cross-section of the end of the molded side 56 of the molded section 55, and the tip of the molded side 56 is formed with a projecting portion 56a, whose end surface 56C is an arcuate concave surface. It is formed of.

Further, as shown in FIG. 19, when the shaped material 55 is rolled by the rolling rolls 60 and 61, the overhanging portion 56a is rolled in the thickness direction, so that the end surface of the formed side portion 56 of the shaped material 55 is rolled. 56C has a flat shape, and the end surface 56
The edge of C becomes sharper.

Similarly, the end surface 58C of the other molded side 58 of the molded section 55 is flat, and the edge of the end surface 58C is sharp.

In this embodiment, a shaped material 55 having a W-shaped cross section is further rolled using a wrap-shaped roll 60 and a drum-shaped roll 61 as shown in FIG. Furthermore, as shown in FIG. 21, using rolling rolls 63 and 64, the molded section 55 is rolled into a shape similar to a channel, and as shown in FIG. The material 55 is formed and rolled to form a channel material having the final cross-sectional shape.

[Effects of the Invention] According to the method of manufacturing a rolled section with excellent surface texture of the present invention,
In manufacturing a longitudinally extending rolled metal section having a final cross-sectional shape having at least one side and the other side intersecting the one side at a predetermined intersection angle, the following steps are carried out: implement. In other words, it is made of metal that has a shape on the same plane in the cross section, or has at least one middle side and the other middle side that intersect at an angle different from the set intersection angle, and has a shape that is closer to a flat surface than the final cross-sectional shape. Use intermediate profiles. Then, at least one surface in the thickness direction of the intermediate profile is ground or polished with a surface treatment member to create a texture-improved surface, and the skin-improved surface is then cold-rolled to further reduce the surface roughness of the skin-improved surface. do. Therefore, according to the method of the present invention, even if the material has an irregular cross section, such as angle material or channel material,
It is possible to obtain a rolled shape having a mirror surface or a surface texture close to a mirror surface with small surface roughness.

[Brief explanation of drawings]

1 to 6 show a first embodiment in which the present invention is applied to a method for manufacturing an angle member, and FIG. 1 is a cross-sectional view of an intermediate section;
FIGS. 2 to 6 are cross-sectional views showing each process according to the first embodiment. FIGS. 7 and 8 show a second embodiment, and are sectional views each showing a step of polishing one surface of an intermediate section. FIGS. 9 and 10 show the third embodiment, and each is a sectional view showing the process of polishing one side of the intermediate section. 11 and 12 are smaller versions of the fourth embodiment,
FIG. 6 is a cross-sectional view showing a step of polishing one side of each intermediate section. 13 to 22 show a fifth embodiment in which the present invention is applied to a method for manufacturing a channel material, FIG. 13 is a cross-sectional view of an intermediate section, and FIGS. 14 to 16 are a fifth embodiment. It is a sectional view showing each process involved. FIG. 17 is a cross-sectional view of the vicinity of the groove of the groove roll, FIG. 18 is a cross-sectional view of the overhanging portion, and FIGS. 19 to 22 are cross-sectional views showing each process according to the fifth embodiment. In the figure, 1 is an intermediate section, 8.10 is a grindstone (surface treatment member)
, 20 indicates a molded section. Patent applicant Aichi Steel Co., Ltd.

Claims (1)

[Claims] (1) A longitudinally extending metal rolled shape having a final cross-sectional shape having at least one side in a cross-section perpendicular to the longitudinal direction and the other side intersecting the one side at a predetermined intersection angle. It is a method of manufacturing metal that has at least one middle side and the other middle side that lie on the same plane in cross section or intersect at an angle different from the set intersection angle, and has a shape that is closer to flat than the final cross-sectional shape. and a surface treatment member for grinding or polishing the intermediate shape, at least one surface in the thickness direction of the intermediate shape is ground or polished with the surface treatment member, and the intermediate shape is a step of making at least one side of the material a skin-improved surface; and approximating the intermediate one side and the other intermediate side of the intermediate section having the skin-improved surface to a final cross-sectional shape or a final cross-sectional shape. A step of bending into a shape to obtain a molded shape material, and a step of cold rolling the skin-improved surface of the molded shape material with a rolling roll to further reduce the surface roughness of the skin-improved surface are carried out in order. A method for producing a rolled shape with excellent surface texture.