Method for forming the short side end of unequal angle steel

Abstract

To enable stable forming operation, as well as, realize down-sizing and achieve shortening of an operation by simplifying adjustment on a line.SOLUTION: There is provided a forming method for press forming a short side end part Sa1 of an unequal angle steel S by a forming part 5a of a forming roller 5 with a rotation axis 51, which is set in a width direction crossing a height direction of a short side part Sa, as a rotation center. The method includes a forming step, in which, the forming part 5a, which faces the short side end part Sa1, can control pressing force by adjusting the forming roller 5 in the height direction using lifting drive means 2, as well as, control a width of a gap between the forming roller and the short side end part by automatically adjusting the forming roller in the width direction through adjustment springs 43 built in a roller holder 4.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a forming method and a forming device for forming the ends of the short sides of unequal angle steel. [Background technology]

[0002] Conventionally, JP 2012-161841 A and JP 2015-77624 A (hereinafter referred to as "Patent Document 1" and "Patent Document 2") have been proposed as devices for forming the short side ends of unequal leg angle irons. The forming devices shown in these patent documents have forming rollers for forming the short side ends of the unequal leg angle irons. The forming rollers are supported on vertical rotating shafts that face long side guide rollers that guide the long side portions of the unequal leg angle irons. The forming rollers are shaped like an inverted T, with the lower side formed into a concave shape around the entire circumference. Patent Document 2 discloses a method of forming short side ends of an unequal angle iron on a forming portion of a forming roller while holding both the front and back sides of the angle iron. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-161841 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-77624 Summary of the Invention [Problem to be solved by the invention]

[0004] Although the conventional method can form the short side edges, the shape of the unequal angle iron is asymmetrical, and the amount of bending of the unequal angle iron tends to vary significantly in the width and height directions as well as in the longitudinal direction. Therefore, accurate positioning of the forming roller is required to accurately press the short side edges against the forming part of the forming roller. Fine adjustment of the position of the forming roller is essential to match the above behavior, and significant improvements were needed to achieve stable continuous rolling. Furthermore, because the forming roller is supported on a vertical rotation axis as mentioned above, the forming roller itself is large, and adjustment of the other supporting rollers on the forming line takes time. SUMMARY OF THE INVENTION An object of the present invention is to enable stable molding operations, to realize compactness, and to simplify on-line adjustments to shorten the work time. [Means for solving the problem]

[0005] The first feature of the method for forming the short side end of unequal leg angle steel according to the present invention is that it is a forming method in which the short side end of a rolled unequal leg angle steel is press-formed by the forming portion of a forming roller whose center of rotation is an axis of rotation set in the width direction that intersects the height direction of the short side, and during the forming process, the forming portion facing opposite the short side end can control the pressing force by adjusting the forming roller in the height direction, and can also control the width of the gap with the short side end by adjusting it in the width direction. The second feature of the method for forming the short side end portions of unequal leg angle steel according to the present invention is based on the first feature, and is that height adjustment of the forming roller is performed using a lifting drive means that operates a roller holder equipped with the forming roller, and width adjustment of the forming roller is performed using an adjustment spring provided in the roller holder. a roller holder for rotating the roller around a rotation axis whose axial direction is set in the width direction and which forms a forming portion facing the short side end of the unequal angle steel; a forming portion for pressing the short side end of the unequal angle steel against the short side end of the unequal angle steel; a forming portion for pressing the short side end of the unequal angle steel against the short side end of the unequal angle steel; a forming portion for pressing the short side end of the unequal angle steel against the short side end of the unequal angle steel; a forming portion for pressing the short side end of the unequal angle steel against the short side end of the unequal angle steel; a forming portion for pressing the short side end of the unequal angle steel against the short side end of the unequal angle steel; The second feature of the forming device for the short side end of unequal leg angle steel according to the present invention is based on the first feature of the forming device, and is that the forming portion of the forming roller has a concave shape provided on the outer periphery centered on the rotation axis. The third feature of the forming device for the short side end of unequal leg angle steel according to the present invention is based on the first or second feature of the forming device, and is that the adjustment spring is installed within the roller holder with a guide pin sandwiched between them. [Effects of the Invention]

[0006] According to the present invention, the position of the forming roller can be easily moved on the line by adjusting the amount of pressure using the lifting drive means, and because the roller holder is equipped with an adjustment spring, the forming roller can follow changes in the behavior of the unequal leg angle iron.As a result, stable forming operations are possible, the forming equipment can be made smaller, and on-line adjustments can be simplified, shortening the work time. [Brief explanation of the drawings]

[0007] [Figure 1]1 is a partially cutaway front view showing a forming device for forming short side ends of unequal leg angle steel according to the present invention. FIG. [Figure 2] 1 is a side view showing a forming device for forming the short side end portion of an unequal leg angle steel according to the present invention. FIG. [Figure 3] 1 is an enlarged front view showing the installation state of the main parts of the forming device for the short side end of the unequal leg angle steel according to the present invention. FIG. [Figure 4] 1 is a side view showing, in a reduced scale, a holding guide in a forming device for the short side end of an unequal leg angle iron according to the present invention, and a fluid cylinder removed from the holding guide. FIG. [Figure 5] 2 is an enlarged cross-sectional view taken along the line VV in FIG. 1, in which the guide bottom is omitted. [Figure 6] FIG. 2 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] FIG. 7 is an enlarged cross-sectional view taken along line VII-VII in FIG. [Figure 8] 1 is a front view showing a reduced elevation guide box in a forming device for forming the short side end portion of unequal angle steel according to the present invention. FIG. [Figure 9] FIG. 9 is a side view of the lift guide box shown in FIG. 8. [Figure 10] 1 is an exploded and reduced front view showing the relationship between a roller holder, a guide pin, and an adjustment spring in a forming device for the short side end of unequal angle steel according to the present invention. FIG. [Figure 11] FIG. 11 is a side view of the roller holder shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] A forming device for forming short side ends of unequal leg angle steel according to the present invention will be described with reference to the drawings. The forming device M for the short side end Sa1 of the unequal leg angle steel S shown in Figures 1 and 3 comprises a holding guide 1, a lifting drive means 2, a lifting guide box 3, a roller holder 4, and forming rollers 5. When actually using the forming device M, the forming device is first installed in an oblique position along the length of the long side Sb as shown in Figure 3.

[0009] 1 to 5, the holding guide 1 is assembled by a guide bottom portion 1a located in the direction of arrows H1 and H2 (left and right direction in FIG. 4), which is the width direction intersecting with the direction of arrows T1 and T2 shown in FIG. 1 (up and down direction in FIG. 4), which is the height direction of the short side portion Sa, and a guide side portion 1b located in the up and down direction in FIG. 4, which is the direction along the height direction. As shown in Figures 6 and 7, guide rails 11 are provided on both sides of guide side portion 1b. In the example shown in Figure 6, each guide rail 11 is an inverted trapezoidal member, which is fixed to guide side portion 1b with screws 12. Opposing sides of both guide rails 11 form guide grooves 11a, and the opposing surfaces of both guide grooves are inclined so that they gradually move away from each other toward guide side portion 1b. A fluid cylinder 2, which is an elevation drive means, is disposed on the outside of the guide bottom 1a of the receiving guide 1 (bottom side in FIG. 2), and an elevation guide box 3 is disposed on the inside of the guide side 1b (left side in FIG. 2).

[0010] 1 to 5, a main body 2a of a fluid cylinder 2 is attached at an end on the guide bottom 1a side, and a cylinder rod 21 protrudes from a cylinder rod cover 2b toward the guide bottom. The fluid cylinder 2 is positioned by fitting a cylinder rod cover 2b into the guide bottom 1a, and is fixedly attached to the guide bottom with a cylinder mounting bolt 22 through a mounting hole 2a1. The cylinder rod cover 2b is fixed to the body 2a of the fluid cylinder 2 with a mounting bolt 23 for this cylinder rod cover. The cylinder rod 21 of the fluid cylinder 2 penetrates the guide bottom 1a and extends into the holding receiver guide 1. The cylinder rod 21 can move back and forth in the directions of arrows T1 and T2, which are the height direction of the short side portion Sa. The tip of the cylinder rod 21 is connected to the lifting guide box 3.

[0011] 6 to 9, the lift guide box 3 is assembled from a bottom 3a, both side sections 3b and 3c, and a back section 3d, with openings 3e and 3f on the top side (FIG. 8) and front side (left side in FIG. 9), respectively. Opening 3f is closed by a cover plate 31, and this cover plate is fixed with bolts 32. The lift guide box 3 shown in FIGS. 1 to 3 is disposed inside the holding receiving guide 1, and the bottom 3a of the lift guide box is positioned away from the guide bottom 1a. The bottom 3a of the lift guide box 3 is connected to the cylinder rod 21 of the fluid cylinder 2. Therefore, the lift guide box 3 can be raised and lowered (moved up and down in FIG. 1) in the height direction of the short side portion Sa (in the directions of arrows T1 and T2) in response to the extension and contraction of the cylinder rod 21. 6 and 7, a convex slide portion 3d1 is provided on the rear side of the rear portion 3d of the lift guide box 3. The slide portion 3d1 is formed so that the rear portion 3d of the lift guide box 3 has a dovetail-shaped cross section. The slide portion 3d1 is slidably fitted into the guide grooves 11a of both guide rails 11. The lift guide box 3 is movably supported on the guide rails 11 via the slide portion 3d1.

[0012] The roller holder 4 and the forming roller 5 will be described. 1, 6, 7, 9, and 10, the roller holder 4 has a guide pin 41, a spring support pin 42, and an adjustment spring 43. The tip side (upper end side in FIG. 1) of the main body 4a of the roller holder 4 forms a roller receiving portion 4b. 10 and 11, a bearing hole 4c penetrates the width direction at the center of the main body 4a of the roller holder 4, and a guide pin 41 is inserted into this bearing hole. Both ends of the guide pin 41 inserted into the bearing hole 4c are journaled on both side portions 3b, 3c of the lift guide box 3 (see FIG. 1). Therefore, the roller holder 4 is attached to the lift guide box 3 (FIG. 2) via the guide pin 41. Furthermore, pin support holes 4d are formed on each side of the bearing hole 4c in the main body 4a of the roller holder 4, for passing through spring support pins 42 (shown by chain lines in Figure 1). As shown in Figure 7, both ends of the spring support pins 42 on each side extend from the roller holder 4 and are journaled on the sides of the lift guide box 3. The pin support holes 4d on each side form a pair in the example shown in Fig. 10. Each pair of pin support holes 4d is a storage hole with a large diameter so that the coil-shaped adjustment springs 43 wound around the spring support pins 42 can be inserted and stored from the side of the main body 4a of the roller holder 4. The guide pin 41 and the spring support pins 42 on each side are parallel to each other as shown in FIG. 1, 3, 6, and 7, the roller holder 4 is disposed inside the lift guide box 3, with the bottom and side surfaces of the main body 4a positioned away from the lift guide box 3, and the roller receiving portion 4b protruding from the opening 3e of the lift guide box. Therefore, the roller holder 4 is movable along the height direction (directions of arrows T1 and T2) of the short side portion Sa or in the width direction (directions of arrows H1 and H2), i.e., up and down, left and right.

[0013] As shown in FIGS. 1 and 3, the forming roller 5 forms a forming portion 5a, which receives the short side end portion Sa1 of the short side portion Sa in the height direction (directions of arrows T1 and T2). The forming roller 5 has a rotation axis 51 extending in the width direction (the direction of arrows H1 and H2), which serves as the center of rotation. The forming roller 5 is mounted so as to be rotatable around the rotation axis 51, which is journaled in the roller receiving portion 4b of the roller holder 4. As shown in FIGS. 1 and 3, the forming portion 5a forms a concave curved surface against which the short side end Sa1 can abut. The concave forming portion 5a is formed around the entire outer periphery of the forming roller 5 (see the chain line in FIG. 2), so that the short side end Sa1 can be formed into a smooth, edgeless, arc-shaped curved surface that bulges outward. The position of the forming portion 5a of the forming roller 5 can be adjusted vertically and horizontally. In other words, the position of the forming portion 5a can be adjusted in the direction along the rotation axis 51 of the forming roller 5 (the direction of arrows H1 and H2) and in the direction intersecting this direction (the direction of arrows T1 and T2). The position adjustment of the forming portion 5a in the vertical direction (the direction of arrows T1 and T2) is performed based on the extension and retraction drive of the cylinder rod 21 of the fluid cylinder 2, since the roller holder 4 is movably attached within the lift guide box 3. Regarding the adjustment of the left-right position of the forming section 5a (in the directions of arrows H1 and H2), the adjustment springs 43 wound around the spring support pins 42 journaled on both side sections 3b and 3c of the lift guide box 3 exert a spring force toward the side sections 3b and 3c of the lift guide box 3 and toward the partition 4a1 (FIG. 7) of the main body 4a of the roller holder 4. Therefore, the forming section 5a moves together with the roller holder 4 against the spring force of the adjustment springs 43 in response to the left-right movement of the short side end Sa1, and returns to its original position when the movement is stopped. In this way, the left-right position of the forming section 5a is automatically adjusted based on the movement of the roller holder 4.

[0014] A method for forming the short side end portions of unequal leg angle steel according to the present invention will be described. As shown in Figure 1, when the short side portion Sa of the unequal leg angle steel S is lowered toward the forming portion 5a of the forming roller 5 while facing it, the forming portion 5a eventually receives the short side end portion Sa1 of the short side portion Sa in the vertical direction, which is the height direction (the direction of arrows T1 and T2). At this time, since the forming roller 5 can move up and down, the fluid cylinder 2 is driven to move the forming portion 5a of the forming roller 5 up and down through the lifting guide box 3 and the roller holder 4, thereby adjusting the amount of pressure on the forming line against the short side end Sa1. Regarding the left-right adjustment of the width direction of the forming roller 5 (the direction of arrows H1 and H2), the roller holder 4 is elastically held by the adjustment springs 43 on both the left and right sides, so it follows the changes in behavior of the unequal leg angle iron S and can apply stable pressure while maintaining a constant position against the short side end Sa1, so adjustment is made automatically and no special adjustment operation is required. After adjustment, the unequal leg angle steel S is guided while its short side end Sa1 and the long side end (not shown) of the long side Sb are restrained by guide rollers (not shown), and moves forward while being pressed by pressure rollers (not shown). As the short side end Sa1 of the unequal angle steel S passes through the forming rollers 5, the short side end is pressed toward the forming portion 5a, which forms a concave curved surface on the outer periphery, and is formed into an arc shape that bulges outward, resulting in a smooth, edgeless outer shape.

[0015] Since the binding force on the short side end Sa1 can be adjusted by the forming roller 5, the pressing force of the short side end onto the forming portion 5a can be adjusted to an optimum value. The fluid cylinder 2 is used as a driving means for raising and lowering the forming roller 5 in the height direction (vertical direction), so that the amount of pressure can be easily adjusted on the production line. The width direction (left-right direction) of the forming roller 5 is held by the left and right adjustment springs 43, as the roller holder 4 arranged in the lift guide box 3 allows the forming roller to follow the changes in behavior of the unequal angle iron S, which is the rolled material, during forming through the roller holder, which has the advantage of being able to stably press the forming portion 5a while maintaining a constant position against the short side end Sa1, as described above. As a result, the short side end Sa1 can be smoothly formed over its entire length without tightly restraining the unequal angle iron S, and the forming roller 5 is smaller than conventional ones, allowing the entire forming device to be made more compact. [Explanation of symbols]

[0016] H1,H2 arrows M Molding equipment S Unequal angle steel (rolled material) Sa Short side of unequal angle steel Sa1 Short side end Sb Long side of unequal angle steel T1,T2 arrows 1 Retaining guide 1a Guide bottom 1b Guide side 11 Guide rail 2 Fluid cylinder (lifting drive means) 2a Main unit 21 Cylinder rod 3 Lifting guide box 3d back 3d1 Slide section 4 Roller holder 4a main body 43 Adjustment spring 5 forming roller 5a Molding part 51 Rotation axis

Claims

[Claim 1] This is a forming method in which the short side end portions of the rolled unequal angle steel are press-formed by the forming portion of a forming roller whose rotation center is a rotation axis set in the width direction that intersects with the height direction of the short side portions, During the forming process, the forming section facing the short side edge controls the pressing force by adjusting the forming roller in the height direction through an elevation drive means that operates a roller holder equipped with the forming roller, and the position in the width direction is adjusted by maintaining a constant position relative to the short side edge by an adjustment spring that elastically holds both sides of the roller holder in the width direction. A method for forming the short side end of an unequal angle steel.

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