JPH0734937B2 - Cold roll forming equipment - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a plurality of feeding units that only drive and feed a material, and a non-driving molding that is disposed between the feeding units and that bends and forms the material. The present invention relates to a cold roll forming apparatus that forms a lightweight section steel such as a lip channel section steel together with a unit.

[Prior Art] A general cold roll forming machine has a structure in which multiple stages of horizontal roll stands driven by power are arranged in tandem. The material is bent and formed together.
That is, the upper and lower horizontal forming rolls incorporated in the horizontal roll stand form a predetermined roll hole mold to be formed, and are rotationally driven by the connected drive shaft to drive and feed the material. Together with.

With respect to the above-mentioned general roll forming method, the material feed drive and the material bending formation are separated, and the material feed drive is a feed drive dedicated roll stand having upper and lower horizontal cylindrical drive rolls, that is, , The feeding unit, and the material forming is arranged between each feeding unit,
A method is conventionally known in which a forming unit having a plurality of idler rolls functioning as a roller die is used. The molding unit includes a roller that comes into contact with the outer surface near the corners (bent portions) on both sides of the horizontal bottom of the molding, a roller that comes into contact with the outer surface of the side, and a roller that comes into contact with the inside of the corner. In this structure, three sets of idle rollers are attached to the left and right movable support plates that can be moved and adjusted in the width direction of the material, and the material passes through the gaps between the idle rollers that function as roller dies. At this time, predetermined bending is performed (see Japanese Patent Laid-Open No. 55-106630 or Japanese Patent Publication No. 52-17517).

The roller die molding method described above is capable of avoiding an increase in roll diameter and downsizing the entire apparatus, and is capable of forming various product outer sizes with a similar cross-sectional shape with one set of molding unit. Is non-drive,
Coupled with being able to support various product outer sizes, it is easy to carry out the reassembling work due to the change of product outer size, the reassembling time is greatly shortened, the roller diameter is small, and the slip between materials is small. Therefore, it has various advantages such as reduction of forming force.

[Problems to be Solved by the Invention] As described above, the roller die molding method has various advantages. Among them, in order to further exert the advantage of being able to deal with various product outer sizes, the same size When changing only the plate thickness of the above products (plate thickness changing work)
Is required to be easier. However, in the conventional roller die method of this type, the fact that no special consideration is given to the change of the plate thickness is given, and the roller holder that supports each idle roller is attached to the movable roller holder to which the roller holder should be attached. The structure is such that bolts are simply tightened so that the position can be moved on the support plate. However, the change of the plate thickness is an adjustment of a minute size, and it is not easy to perform it accurately, and if the plate thickness is not set properly, a molded product having a regular shape and size cannot be obtained.

The present invention has been made in view of the above circumstances, and an object of the present invention is to obtain a cold roll forming apparatus capable of easily and accurately adjusting the plate thickness in a roller die forming method in a short time. And

[Means for Solving the Problems] In the present invention, in order to solve the above-mentioned problems, a molding unit is provided with an idle receiving roller that comes into contact with the outer surface near the corner of the bottom portion, and a play roller that comes into contact with the outer surface of the side portion. Rolling side molding rollers and free-running butting rollers that come into contact with the inner radius of the corners are attached as a set to the left and right movable support plates that can be adjusted in the material width direction via roller holders. In addition to being configured to be integrally movable and adjustable, the roller holder that supports the abutting roller is rotatable on the movable support plate in the thickness direction of the corner radius part about a fulcrum pin orthogonal to the material advancing direction. I installed it.

[Operation] In the above configuration, when the roller holder that supports the abutting roller is rotationally adjusted around the fulcrum pin that is orthogonal to the material advancing direction, the position of the abutting roller in the corner radius portion plate thickness direction is adjusted. That is, plate thickness adjustment is performed by the abutting roller, the receiving roller, and the side edge forming roller so as to match the plate thickness of the material to be bent and formed.

In addition, the movable support plate can be laterally moved and adjusted in the width direction so that the three rollers can be integrally moved and adjusted in the width direction, and accordingly, it is possible to respond to a change in the outer size of the product.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 12.

FIG. 1 is an overall side view of a cold roll forming apparatus according to an embodiment of the present invention, and 1 is a forming machine base. On the molding machine base 1, the widthwise position of the material to be molded 2 (hereinafter simply referred to as the material, the same reference numeral 2 is used for both the flat plate stage before molding and the stage where molding has progressed). Guide stand 3,
Further, horizontal roll stands 4 dedicated to driving of, for example, 6 stages shown by P _{1 to} P ₆ are installed, and roll stands 4 dedicated to each driving are provided.
A non-driving molding unit 5 indicated by R _{1 to} R ₁₀ is provided between the two. An overbend unit 6 indicated by R ₁₁ for preventing springback and a bending-back unit 7 indicated by R ₁₂ are provided on the exit side of the final-stage drive-dedicated roll stand P ₆ . This embodiment shows the case where lip channel steel is formed as shown in the figure.

The guide stand 3 guides both side edges of the material 2 by the left and right guide rolls 3a as shown in the front view in FIG.
The roll stand 4 dedicated to driving is shown in FIG. 3 showing two stages of P ₁ and P ₂ (that is, before starting the bending of the flange portion),
And, as shown in FIG. 4 showing four stages of P _{3 to} P ₆ (that is, after the start of the bending of the flange portion), the flat portion of the material 2 is sandwiched by the upper and lower horizontal feed drive rolls 4a and 4b to perform the feed drive. However, as shown in the figure, it is merely a feed drive and does not participate in molding.

The molding unit 5 will be described in detail. This molding unit 5 includes two adjacent molding units 5 as shown in FIG. 5 showing R _{1 to} R ₄ , FIG. 6 showing R _{5 to} R ₇ , and FIG. ₇ showing R _{8 to} R ₁₀ . A first face plate 8 serving as a common base is provided. The first face plate 8 includes upper and lower frame members 9 fixed to front and rear drive roll stands 4.
And is perpendicular to the direction in which the molding material advances (the direction of arrow (a) in FIG. 1). Further, the first face plate 8 is provided with a material passage hole through which the material passes.
Each of the first face plates 8 is provided with a pair of left and right second face plates (movable support plates) 11 which are guided by a guide guide 10 and are movable in the material width direction (for example, the horizontal direction in FIG. 5). . The second face plate 11 has a material passage hole 11a for allowing the material to pass therethrough. Although not shown, a drive mechanism for moving the second face plate 11 left and right is provided. Further, as shown in FIG. 1, the second face plates 11 are provided on both sides of each first face plate 8.
That is, the molding units 5 are provided on both sides of each first face plate 8.

The second face plate 11 has a bottom portion of the molding material 2 (a portion which becomes a flange portion 2d later in R _{1 to} R ₄ , and a web portion 2a in R _{5 to} R ₁₀ ).
The cylindrical receiving roller 12 which is in contact with the lower surface in the vicinity of the corner portion 2b, and the side portions (the lip portions 2c, R _{5 to} R _{10 in} R _{1 to} R ₄ ).
Then, a free-wheeling cylindrical side forming roller 13 that contacts the outer surface of the flange 2d) and a free-wheeling acute-angle abutting roller 14 that contacts the inner rounded portion of the corner 2b are respectively provided in the roller holder 15. It is attached as a set through 16,16,17. The shaft 18 of the receiving roller 12 is parallel to the bottom portion 2a, that is, horizontal. The shaft 19 of the side forming roller 13 has a side portion (a lip portion 2c for R _{1 to} R _{4 and a} flange portion 2 for R _{5 to} R ₁₀ ).
parallel to d). The shaft 20 of the abutting roller 14 is perpendicular to the direction of the bisector of the angle θ of the corner portion 2b, as shown in an enlarged manner in FIG. Therefore, the abutting roller 14 rotates in a plane including the bisector of the angle θ of the corner portion. The radius (curvature radius) of the outer peripheral tip edge of the abutting roller 14 at an acute angle is preferably about 1t to 3t are with respect to the plate thickness t.

The supporting structure of the abutting roller 14 in the forming unit 5 of R _{1 to} R ₄ or R _{5 to} R ₇ is shown in FIGS. The roller holder 17 that rotatably supports the abutting roller 14 is substantially L-shaped when viewed from the side as shown in FIG. 8B, and has one end fixed to the second face plate 11 with a bolt 21. The abutting roller 14 is attached to the lower end of the holder receiver 22.
Is rotatably connected by a fulcrum pin 23 parallel to the shaft 20, and the other end on the upper side is fixed to the bracket portion 22a of the roller holder receiver 22 by a bolt 25 with a plate thickness adjusting liner 24 interposed. In this way, the roller holder 17 moves in the thickness direction of the corner radius portion about the fulcrum pin 23 (that is, in the bisector direction of the corner angle θ: but not necessarily strictly in the bisector direction). It is rotatably attached to the second face plate 11. The plate thickness adjusting liner 24, as shown in FIGS. 9 (a) and 9 (b), has a groove 24a which is open to one side for passing the bolt 25.

Figure 12 (a), (b) shows the support structure of the abutment roller 14 in the molding unit 5 of R ₈ to R ₁₀ which corner portion proceeds bending of the flange portion 2d is become blind.
The roller holder 27 that supports the abutting roller 14 is
As shown in the front view of FIG. 12A, only the lower part supporting the abutting roller 14 by the shaft 20 has the angle θ of the corner portion 2b of 2
It is inclined in the direction of the bisector and the upper part is vertical. The roller holder 27 is rotatably connected to a bracket 28 that is directly welded and fixed to the second face plate 11 by a fulcrum pin 29, and an upper portion of the roller holder 27 has a plate thickness adjusting liner 30 interposed between the bolt 31 and the second face plate 11. It is fixed directly with. This structure allows
The inside of the corner portion 2b, which is a blind, is appropriately contacted without interfering with the lip portion 2c of the molding material 2.

Next, the operation will be described.

In FIG. 1, the material 2 is continuously sent out from a material supply device (not shown), the position in the width direction is regulated by a guide stand 3, and is sent to a drive-dedicated roll stand 4. A predetermined molding is performed by sequentially passing through the stand 4. As shown in FIG. 3 or FIG. 4, the drive-dedicated roll stand 4 simply performs the feed drive by sandwiching the flat portion of the material by the upper and lower flat feed drive rolls 4a and 4b. By the feed drive of the roll stand 4 dedicated to the feed drive, the material passes through each of the forming units 5 of R _{1 to} R ₁₀ , and the left and right of the three rollers of the receiving roller 12, the side forming roller 13 and the abutting roller 14 are passed. Functions as a roller die, and the material is sequentially bent and formed. In this molding, the abutting roller
Since 14 comes into contact with the corner rounded portion in a narrow region, the bending forming by the three rollers 12, 13, 14 can be performed with a small forming force, and the sharp bending can be performed. In this embodiment, the molding unit 5 of R _{1 to} R ₄ molds the lip portion 2c, and the molding unit 5 of R _{5 to} R ₁₀ molds the flange portion 2d, among which R ₈ to The R ₁₀ molding unit 5 is molded after the corner portion 2b becomes a blind. Next, although detailed illustration is omitted, in order to prevent springback, three rollers, that is, a receiving roller, a side roller, and an abutting roller, which are supported by a structure substantially similar to that of the molding unit shown in FIG. 7, are installed. The overbend unit 6 (R ₁₁ ) used is used to overbend the flange portion 2d, and then the bending back unit 7 (R ₁₂ ) is bent back to obtain the final cross-sectional shape of the lip channel steel.

In the above molding machine, when changing the product external size in a similar cross-sectional shape, for example, when changing to a product in which the dimensions of the web portion, the flange portion, and the lip portion are different with the same lip channel steel, in the molding unit 5 of each stage The second face plate 11 is moved and adjusted to the left and right, and the receiving roller 12, the side forming roller 13,
The assembly of the abutting rollers 14 is integrally moved and adjusted together with the second face plate 11 on the left and right sides and brought to the bending position in the forming stage. As described above, since it is possible to perform molding of various kinds having different cross-sectional shapes and different product outer sizes only by adjusting the movement of the second face plate 11, the number of sets of molding parts to be prepared corresponding to the kinds. Less, and
Reassembling when changing the size is significantly easier, and reassembling time is greatly reduced.

When the product outer size is the same and the plate thickness is simply different, the position of the outer surface of the molding material 2 in the molding unit 5 of each molding stage is common, and the inner surface position changes according to the increase or decrease of the plate thickness. Therefore, in this case, the positions of the receiving roller 12 and the side forming roller 13 are not changed, and only the abutting roller 14 is adjusted according to the plate thickness. This plate thickness adjustment is performed by replacing the plate thickness adjusting liner 24 of the roller holder 17 supporting the abutting roller 14 with a predetermined one corresponding to the material plate thickness. This exchange is performed by loosening the screw 25, removing the plate thickness adjusting liner 24, inserting a new plate thickness adjusting liner 24, and tightening and fixing the screw 25. By exchanging the plate thickness adjusting liner 24, the rotation angle of the roller holder 17 about the support pin 23 is adjusted,
The abutting roller 14 is displaced in the direction of the bisector of the corner 2b to form a gap corresponding to a predetermined plate thickness. In this case, since the moving direction of the abutting roller 14 is the direction of the bisector of the angle θ of the corner portion, the change in the plate thickness in the vertical direction (the web portion 2a
It is also possible to appropriately cope with a change in plate thickness in the left-right direction (change in plate thickness at the flange portion 2d). The plate thickness adjusting liner 24 is the same as the plate thickness adjusting liner of the reference thickness shown in FIG.
As shown in (b), both surfaces are parallel surfaces, but if the thickness is thicker or thinner than this, the roller holder 17 rotates about the pin 23, and therefore, as shown in FIG.
As shown in (b), FIG. 11 (a), and (b), both sides of the plate thickness adjusting liner 24 are tapered so that the entire surface is in close contact. FIGS. 10 (a) and 10 (b) show the state when the plate thickness is made thicker than the case of FIGS. 8 (a) and 8 (b).

The plate thickness adjusting mechanism is not limited to the one described above, but may be one that positions with a screw without using a liner, or one that performs automatic adjustment by rotationally driving this screw with a motor. In short, it is sufficient that the roller holder 17 can rotate around the fulcrum pin 23 and can be positioned and fixed at a predetermined rotation angle.

The arrangement of the drive-dedicated roll stand 4 and the forming unit 5 is such that the forming units are arranged in two stages between the front and rear drive-dedicated roll stands 4 in the embodiment, but the arrangement is not limited to this, and for example, in one stage. It may be arranged alternately, or the number of forming units between the drive-dedicated roll stands may be appropriately changed. In short, a feed driving force that allows bending and forming the material through the forming units is obtained. Anything will do.

The frame 9 that supports the molding unit 5 is not limited to one that is attached to a drive-only roll stand, and may be, for example, R ₁ to
The structure may be such that all the molding units of R ₁₀ are mounted on an integral frame, or the molding units may be individually installed on the molding machine base 1.

The present invention is not limited to the lip grooved steel of the embodiment, but is bent to both sides of the horizontal bottom portion such as light grooved steel, unequal edge grooved steel, light Z-shaped steel, lip Z-shaped steel and the like. It can be applied to the forming of various lightweight shaped steels having side portions.

As described above, according to the present invention, the molding unit is
An idle receiving roller that contacts the outer surface near the corner of the bottom portion, an idle side forming roller that contacts the outer surface of the side edge, and an idle abutment roller that contacts the inner radius of the corner edge. And a movable support plate that is movable and adjustable in the width direction via a roller holder as a set so as to be integrally movable and adjustable, and a roller holder that supports the abutting roller is In addition, since it is attached so that it can rotate in the plate thickness direction of the corner radius part around the fulcrum pin that is orthogonal to the material advancing direction, the plate thickness can be adjusted accurately by a simple operation of rotating the roller holder around the fulcrum pin. The thickness adjustment operation has been significantly simplified, and the adjustment time has been greatly shortened. This gives 1
The advantages of the roller die molding method, which can handle a wide variety of products with a conventional molding unit, have been further enhanced.

[Brief description of drawings]

1 is an overall side view of a cold roll forming apparatus according to an embodiment of the present invention, FIG. 2 is a front view of a guide stand, and FIG. 3 is P ₁
Front view of a drive dedicated roll stand to P _2, Fig. 4 P ₃ ~
Front view of a drive dedicated roll stand P _6, Fig. 5 R ₁ to R ₄
6 is a perspective view of a molding unit of R _{5 to} R ₇ , FIG. 7 is a perspective view of a molding unit of R _{8 to} R ₁₀ , and FIG. 8B is an enlarged front view of the abutting roller of FIG. 8, FIG. 8B is a side view of the same, FIG. 9A is a plan view of the plate thickness adjusting liner in FIG. 8, and FIG. Fig. 10 (a) is an enlarged front view of the abutment roller when changing the plate thickness, Fig. 10 (b) is the same side view, and Fig. 11 (a) is the 10th view.
A plan view of the plate thickness adjusting liner in the figure, FIG. 11 (b) is the same side view, FIG. 12 (a) is an enlarged front view of the abutting roller of FIG. 7, and FIG. 12 (b) is the same side It is a figure. 2 …… Material (molding material), 2a …… Web part (bottom part), 2b
...... Corner part, 2d …… Flange part (side part), 4 ……
Dedicated roll stand for feed drive (feed unit), 5 ...
Forming unit, 8 ... First face plate, 11 ... Second face plate (movable support plate), 12 ... Receiving roller, 13 ... Side forming roller, 14 ... Abutting roller, 15, 16, 17, 27 …… Roller holder, 23,29 …… fulcrum pin, 24 …… Liner thickness adjustment liner.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Publication Sho 62-3688 (JP, B2)

Claims (1)

[Claims] 1. A plurality of feed units that only drive the feed of materials, and a non-drive forming unit that is arranged between the feed units and that performs bending and forming of materials. In a cold roll forming apparatus for forming a light-weight section steel having a cross-sectional shape having a bent side portion, the forming unit includes a free rotation receiving roller that contacts an outer surface near a corner portion of a bottom portion, and a side portion. Of the idle side forming roller that comes into contact with the outer surface of the roller and the idle abutment roller that comes into contact with the inner rounded portion of the corner part are respectively mounted on the left and right movable support plates that can be adjusted in the width direction of the material. The roller holder configured to be attached as a set via a pair so as to be integrally movable and adjustable and to support the abutting roller has a fulcrum pin orthogonal to the material advancing direction on the movable support plate. Cold roll forming apparatus being characterized in that rotatably mounted on the corner radius portion thickness direction.