WO2014045449A1 - 長手方向に断面形状が変化する形鋼の製造方法およびロール成形装置 - Google Patents
長手方向に断面形状が変化する形鋼の製造方法およびロール成形装置 Download PDFInfo
- Publication number
- WO2014045449A1 WO2014045449A1 PCT/JP2012/074443 JP2012074443W WO2014045449A1 WO 2014045449 A1 WO2014045449 A1 WO 2014045449A1 JP 2012074443 W JP2012074443 W JP 2012074443W WO 2014045449 A1 WO2014045449 A1 WO 2014045449A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- roll
- mold roll
- mold
- annular flange
- shape
- Prior art date
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/028—Variable-width rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/28—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
- B21D5/083—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers for obtaining profiles with changing cross-sectional configuration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
- B21D5/086—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers for obtaining closed hollow profiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/095—U-or channel sections
Definitions
- the present invention relates to a method and an apparatus for manufacturing a shape steel whose surface shape changes in the longitudinal direction by roll forming.
- hat-shaped section steel which is one of the section steels
- press forming using a punch and a die is widely known.
- hat-shaped bend forming by press forming since the problem of spring back that the material plate tries to return to its original state due to reaction force is likely to occur when the press pressure is removed, measures to suppress spring back have been studied. I came.
- High-Tensile Steel High-Tensile Steel
- high-strength steel materials have been actively adopted as vehicle body materials, because weight reduction of vehicle bodies leads to reduction of CO2 emissions. For this reason, the problem of spring back due to the high strength characteristics of steel materials has become apparent at the manufacturing site of shaped steel.
- high-tensile steel materials having a tensile strength exceeding 980 MPa have been manufactured. In general press molding, it is difficult to produce a hat-shaped steel as designed from such high-tensile steel.
- a roll forming method is known as another method for manufacturing a shaped steel.
- Roll forming is, for example, a continuous bending method in which a strip drawn from a coil is passed through roll units provided at a plurality of stations arranged in sequence.
- Roll forming is particularly suitable for forming steel products such as H-shaped steel and L-shaped steel, and long products having a constant cross-sectional shape in the longitudinal direction, such as pipes.
- roll forming unlike press forming (drawing), is not suitable for forming a shape steel whose cross-sectional shape changes in the longitudinal direction.
- Patent Documents 1 to 3 disclose a technique of manufacturing a shape steel whose cross-sectional shape changes in the longitudinal direction by roll forming by variably controlling the roll width of the split roll.
- the roll forming methods and apparatuses disclosed in Patent Documents 1 to 3 have a problem that the structure of the apparatus and the control method are complicated. Therefore, in order to implement the inventions of Patent Documents 1 to 3, it is difficult to divert existing equipment, and it is necessary to newly introduce equipment, resulting in high costs.
- the present invention has been made to solve the above-described problems, and its purpose is not to require complicated control and apparatus as in the prior art, and the cross-sectional shape is changed in the longitudinal direction by simple roll forming.
- An object of the present invention is to provide a technique capable of producing a shaped steel.
- Another object of the present invention is to manufacture a steel having a cross-sectional shape that changes in the longitudinal direction by roll forming. For example, a technique that can suppress a lack of mill rigidity when a high-tensile steel is used as a material. It is to provide.
- a method of manufacturing a shape steel having a cross-sectional shape that changes in the longitudinal direction from a sheet material by roll forming, the rotating shaft and a circumference around the rotating shaft Preparing a first mold roll having an annular flange having a cross-sectional shape that changes in the direction, and the first mold roll so that the rotation axis of the first mold roll is perpendicular to the feeding direction of the sheet material Disposing a mold roll; preparing a second mold roll having a rotating shaft; and an annular groove portion whose cross-sectional shape changes in the circumferential direction around the rotating shaft; and the first mold roll; A gap equal to the sheet thickness of the sheet material is formed between the second mold roll and the annular flange of the first mold roll and the annular groove of the second mold roll are fitted.
- the present invention provides a roll forming apparatus for roll forming for producing a shaped steel having a cross-sectional shape that changes in the longitudinal direction from a sheet material, and the cross-sectional shape in the circumferential direction around the rotary shaft.
- a first mold roll having a changing annular flange, wherein the first mold roll is arranged such that the rotation axis of the first mold roll is perpendicular to the feeding direction of the sheet material;
- a second mold roll having a rotating shaft and an annular groove portion whose cross-sectional shape changes in the circumferential direction around the rotating shaft, wherein the rotating shaft of the second mold roll is the first mold.
- a second mold roll disposed so as to be parallel to the rotation axis of the roll, and a drive device that rotates the first mold roll and the second mold roll in synchronization with each other.
- the first mold roll and the second mold roll have a gap equal to the sheet thickness of the sheet material between them, and the annular flange of the first mold roll and the annular of the second mold roll It arrange
- the gist of the present invention is a roll forming apparatus in which a clearance is provided so that the gap widens radially inward.
- the first mold roll having an annular flange whose cross-sectional shape changes in the circumferential direction, and the gap corresponding to the thickness of the shape steel with respect to the annular flange of the first mold roll
- a second mold roll having an annular groove part for receiving the annular flange
- a section steel whose cross-sectional shape changes in the longitudinal direction can be obtained by simple control for synchronously rotating at least the first and second mold rolls. Can be manufactured. Therefore, complicated control such as variably controlling the roll width of the split rolls in order to increase the cross-sectional width is unnecessary.
- the roll body and the material are sufficient even if the cross-sectional shape is changed in the longitudinal direction. Therefore, even if the material is a high-strength steel material, it is possible to prevent the mill from lacking rigidity.
- FIG. 1 is a schematic perspective view of a multi-stage roll forming apparatus according to a first embodiment of the present invention.
- FIG. 3 is an elevation view of a roll unit of the multistage roll forming apparatus of FIG. 2.
- FIG. 4 is an exploded perspective view of a pair of upper and lower mold rolls of the roll unit of FIG. 3. It is a figure which shows the bending process in each step of the multistage roll-forming apparatus of FIG.
- FIG. 2 is a figure which shows the process of forming the flange part of a hat-shaped section steel. It is a figure which shows the bending process in each step of the multistage roll-forming apparatus of FIG. 2, and is a figure which shows the process of forming the upper wall of hat-shaped steel.
- FIG. 1 is an example of a saddle-type hat shape steel whose cross-sectional shape changes in the longitudinal direction (for example, the material axis direction).
- FIG. 1A is a perspective view of a hat-shaped section viewed from above
- FIG. 1B is a perspective view viewed from below.
- the hat-shaped steel 1 includes an upper wall, side walls extending along both side edge portions of the upper wall, and flange portions extending along opposite edges of the side walls.
- the cross section (cross section) perpendicular to the longitudinal direction of the hat-shaped steel 1 is generally a hat shape.
- the hat-shaped steel 1 further expands (or decreases) the portions 10a and 10b whose upper wall width is L1, the portion 11 whose upper wall width is L2 (> L1), and the upper wall width from L1 to L2. It has tapered transition portions 12a, 12b that are width).
- the hat-shaped steel 1 has a hat-shaped cross section in which the side walls are inclined outwardly at the respective portions 10a to 12b, but the inclination angle of the side walls is different in the respective portions 10a to 12b. Alternatively, the same may be applied to the respective parts 10a to 12b.
- the thickness of a shape steel can be set to various thickness according to a specification, a use, etc., for example.
- the portions 10a to 12b are not formed individually and joined together by welding or the like, but are integrally formed by roll forming a single sheet material or strip. Therefore, the boundary line between the parts in FIG. 1 is a line for convenience of explanation, not a joint line or a folding line.
- the flange 13 formed along the longitudinal direction in the opening on the bottom side is also bent by roll forming a sheet material or a strip.
- angular part in the bending process can be made into the chamfered shape as shown, for example in FIG. 1, or R (R) shape.
- the type and strength of the material are not particularly limited, and can be any metal material that can be bent.
- the metal material include steel materials such as carbon steel, alloy steel, nickel chrome steel, nickel chrome molybdenum steel, chrome steel, chrome molybdenum steel, and manganese steel. Based on the strength, those having a tensile strength of 340 MPa or less can be broadly classified as general steel materials and those having a tensile strength of 340 MPa or more can be broadly classified as high-tensile steel materials, but both are applicable in this embodiment.
- high-tensile steel materials include, for example, those of 590 MPa class and 780 MPa class, and what is now called 980 MPa class ultra-high-tensile steel material is also manufactured.
- an ultra-high strength steel material In the case of an ultra-high strength steel material, hat bending may be difficult in conventional press molding (drawing), but in the roll molding of this embodiment, an ultra-high strength steel material of 980 MPa or more is also applicable. Furthermore, as an example of a material other than steel, there is a hard-to-form material containing titanium, aluminum, magnesium, or an alloy thereof.
- FIG. 2 shows a multi-stage roll forming apparatus 2 for manufacturing the hat-shaped section steel as an embodiment of the roll forming apparatus.
- the multi-stage roll forming apparatus 2 includes, for example, a plurality of roll units 20a to 20k that are sequentially arranged in the sheet material or strip feeding direction, from the upstream roll unit 20k to the downstream roll unit 20a.
- the long sheet material or the strip M is bent toward the target while being moved toward the final product shape.
- the finally formed sheet material or strip M is sequentially cut into product units.
- the die roll (hereinafter sometimes referred to as “finishing roll”) of the roll unit 20a of the most downstream station (final station) has a shape corresponding to the target product shape, and is upstream of the finishing roll.
- the mold roll of each station on the side is designed such that an intermediate body gradually approaching the product shape is formed at each stage as it goes downstream.
- FIG. 2 shows an example of a mold roll made into a product by sheet molding or strip M in 10 stages.
- the roll units 20j to 20f In each of the introduction station to the fifth station in which the first half bending process is performed, the roll units 20j to 20f have the roll having the convex roll body on the upper side and the roll having the concave roll body on the lower side. It is arranged.
- the roll units 20e to 20a are arranged such that the roll having the annular flange portion is disposed on the lower side and the roll having the annular groove portion is disposed on the upper side.
- From the introduction station (roll unit 20k: 0th station) to the 5th station (roll unit 20f) is the first half process (flange bending) for forming the flange 13, and from the 6th station (roll unit 20e) to the final station.
- up to 10 stations (roll unit 20a) is the latter half process (upper wall bending) of forming the upper wall of the hat-shaped steel 1.
- the roll unit 20k of the introduction station has a cylindrical die roll that is plain both vertically. Further, in the roll units 20j to 20f from the first station to the fifth station, both end portions of the upper roll are gradually reduced in diameter toward the tip, and both end portions of the roll body of the lower roll are the tip. The diameter gradually increases in the direction toward. Then, the inclination angle of both end portions of the roll becomes steep in order from the first station to the fifth station, and both ends of the sheet material or the strip M are bent to about 90 ° by the roll unit 20f of the fifth station, and the flange A portion 13 is formed.
- Each roll has a narrow part and a wide part in the center of the roll body part in the circumferential direction and a taper part that widens / decreases so that the flange part 13 of each part 10a to 12 of the shape steel is formed. is doing.
- the roll units 20e to 20a from the sixth station to the final station have an annular collar portion in which the center of the roll body of the lower roll is raised in a convex shape, and the center part of the roll body of the upper roll is concave. It has a recessed annular groove.
- the annular flange portion of the lower roll and the annular groove portion of the upper roll have a narrow portion and a width so that the upper wall of each portion 10a to 12 of the hat-shaped section 1 is formed. A wide portion and a tapered portion that is widened / reduced are arranged in the circumferential direction.
- the inclination angle of the side surface of the annular flange portion and the annular groove portion of each roll becomes steep in the order from the sixth station to the final station, and the side wall of the sheet material or the strip M is about 90 ° in the roll unit 20a of the final station.
- the upper wall of the hat is formed by bending.
- the configuration of the mold roll shown in FIG. 2 is an example, and the number of units arranged can be changed as appropriate.
- the shape of the mold roll disposed upstream of the finishing roll can also be changed as appropriate.
- each roll unit 20a to The interval of 20k is set to at least the product length.
- FIG. 3 shows the overall structure of the roll unit 20a in which the finishing roll is incorporated.
- the roll unit 20a includes a first mold roll (hereinafter referred to as a “lower roll 3”) having a rotation shaft 31 extending in the sheet material or strip feeding direction, for example, a horizontal direction, and the first mold.
- a second mold roll (hereinafter referred to as “upper roll 4”) having a rotation axis 41 parallel to the rotation axis 31 of the roll 3 and facing the lower roll 3 with a slight gap is provided.
- the rotary shafts 31 and 41 of the rolls 3 and 4 are rotatably supported by a support member 51 such as a stand by a bearing mechanism 5 such as a ball bearing.
- the rolls 3 and 4 are supported so as to be movable up and down, and the separation distance between the rolls can be adjusted.
- a pressing device such as a hydraulic cylinder may be arranged so that the pressing force of the upper and lower rolls 4 and 3 can be adjusted.
- the upper and lower rolls 4 and 3 are rotationally driven in synchronization by the gear set 52.
- the gear set 52 includes gears 52 a and 52 b that are coupled to the rotary shafts 31 and 41 and engage with each other.
- a driving device 53 such as a driving motor is connected to one end side of the rotating shaft 31 of the lower roll 3.
- the gear set 52 is also a synchronous rotating device for the upper and lower rolls 4 and 3.
- the gear set 52 is not limited to the spur gear as shown in FIG. 3 as long as the upper and lower rolls 4 and 3 can rotate synchronously at the same peripheral speed. Furthermore, instead of the configuration in which the upper roll 4 is driven through the gear set 52, individual drive mechanisms may be connected to the upper and lower rolls 4 and 3. The rotation speed can be adjusted using a drive motor capable of inverter control.
- the upper and lower rolls 4 and 3 arranged at the final station have shapes corresponding to the target product shapes.
- the lower roll 3 has a flank portion 32 that squeezes the upper surface of the flange 13, and protrudes in a convex shape from the outer surface at the central portion in the axial direction of the flank portion 32.
- An annular flange 33 is provided for reducing the inner surface portion.
- the cross-sectional shape of the annular flange 33 exhibits a trapezoid that changes in the circumferential direction corresponding to the hat shape of the product.
- the annular flange 33 has a region 33a in which the width of the outer peripheral surface is set to the first roll width, a region 33b in which the width of the outer peripheral surface is set to the second roll width, and the regions 33a and 33b. And has tapered regions 33c and 33d (which may be referred to as “transition portions” in the following description) where the width of the outer peripheral surface changes from the first roll width to the second roll width. .
- the left and right side surfaces of the annular flange 33 form an inclined surface that expands outward as it goes toward the rotating shaft 31.
- the roll width and height of the annular flange 33 and the inclination angle of the side surface are dimensions corresponding to the width, height and inclination angle of the target hat shape, respectively.
- R (R) is formed or chamfered at the outer corner of the annular flange 33 and the inner corner of the flank 43.
- FIG. 4 as in FIG. 1, the boundary lines between the regions 33a, 33b, 33c, and 33d are shown for convenience of explanation.
- the region 33b of the annular flange 33 forms the part 11 having the width L2 of the hat-shaped steel 1, and the regions 33c and 33d form the tapered parts 12a and 12b of the hat-shaped steel 1, respectively. Accordingly, the arc length of the region 33b is set to the length of the region 11, and the arc lengths of the regions 33c and 33d are respectively set to the lengths of the regions 12a and 12b.
- the region 33a of the annular flange 33 forms both the portions 10a and 10b of the hat-shaped section 1. Accordingly, the arc length of the region 33a is set to a dimension obtained by adding the lengths of the portions 10a and 10b.
- an intermediate point that equally divides the region 33a becomes the start point of the roll.
- an area to be cut is added to the region 33a. It may be.
- marks for example, small-diameter holes, protrusions, etc.
- the upper roll 4 is formed to face the roll body of the lower roll 3 through a gap corresponding to the thickness of the hat-shaped steel 1. Accordingly, the upper roll 4 has an annular groove portion 42 that reduces the hat-shaped outer bottom surface, and a flank portion 43 that is formed on both sides of the annular groove portion 42 and reduces the hat-shaped outer surface and the lower surface of the flange 13. Yes.
- the inner side surface of the annular groove portion 42 is also formed so as to face the side surface of the annular body portion 33 of the lower roll 3 through a gap corresponding to the thickness of the hat-shaped steel 1, thereby the annular groove portion of the upper roll 4. 42 has a cross-sectional shape that changes in the circumferential direction.
- the side surface of the annular groove 42 of the upper roll 4 is an area 43b for forming the portion 11 of the hat-shaped steel 1 and an area for forming the tapered portions 12a and 12b, respectively.
- parts 10a and 10b are formed in the circumferential direction.
- the intermediate point equally dividing the region 43a is the starting point of the roll. Therefore, when the upper and lower rolls 4 and 3 are incorporated into the apparatus, the starting points of the upper and lower rolls 4 and 3 face each other. It is positioned in the rotation direction so as to go around at the position (same phase).
- each of the annular flange 33 of the lower roll 3 and the flank 43 of the upper roll 4 has a cylindrical surface with the same outer diameter.
- the gear 52 which is the synchronous rotation mechanism described above, also has a role of preventing the relative phase between the upper and lower rolls 4 and 3 rotating from changing.
- the upper and lower rolls 4 and 3 are not limited as long as the roll body is made of a sheet material or a material having rigidity higher than that of the strip M.
- the mold roll having an annular flange may be disposed on the upper side, and the mold roll having an annular groove may be disposed on the lower side.
- FIG. 3 shows a roll unit 20a incorporating a finishing roll, but the other roll units 20b to 20k arranged upstream of the finishing roll also have a different roll unit 20a except that the roll shape is different. It can be set as the same structure. Therefore, detailed description of the other roll units 20b to 20k is omitted.
- the radius to the outer peripheral surface of the lower roll 3 is 500 mm for the annular flange 33 and 450 mm for the flank 32. The difference between the two corresponds to the height of the hat shape.
- the width of the outer peripheral surface of the region 33a is 50 mm, and the arc length is 400 mm.
- the width of the outer peripheral surface of the region 33b is 80 mm, and the arc length is 400 mm.
- the portions 33c and 33d have an arc length of 300 mm and are widened or reduced at an inclination angle of 15 °.
- the upper roll 4 is opposed to the lower roll 3 with a gap of 2 mm.
- the upper and lower rolls 4 and 3 of the roll units 20a to 20k are rotated at a predetermined speed, and the sheet material or the strip M is supplied to the roll unit 20k of the introduction station.
- the sheet material or the strip M for example, a steel plate sent from an upstream rolling process or a strip wound in a coil shape can be used.
- the sheet material or the strip M is supplied so that the length direction thereof is orthogonal to the rotation axis direction of the upper and lower rolls 4 and 3 and roll-formed in the length direction of the sheet material or the strip M.
- the sheet material or strip M (intermediate body) fed out from the roll unit 20k is conveyed to the roll unit 20j of the next station by the rotation operation of the upper and lower rolls 4 and 3.
- the second roll unit 20j performs roll forming along the length direction, and is further conveyed to the roll unit 20i of the next station.
- the sheet material or the strip M When the sheet material or the strip M is continuously roll-formed, it may be formed by applying back tension and / or forward tension with the roll units 20a to 20k of each station. Moreover, you may make it roll-form cold, warm, or hot.
- FIG. 5 shows a state where the sheet material or the strip M is bent in stages by the 10-stage roll units 20a to 20k.
- FIG. 5A shows how the flange portion 13 is formed by the roll units 20k to 20f in the 0th to 5th stations.
- FIG. 5B shows how the upper wall of the hat-shaped section 1 is formed by the roll units 20e to 20a in the sixth to final stations.
- 5A and 5B are cross-sectional views of the portion 10a of the hat-shaped steel 1, but the other portions 10b, 11, 12a, and 12b are also bent in stages by the 10-stage roll units 20a to 20k.
- the material (intermediate body) that has been roll-formed in the ninth station has a shape close to that of the final product, and is finally formed by the tenth finishing roll.
- Fig. 6 shows how the finishing roll is finally formed.
- the sheet material or strip M (intermediate body) conveyed from the upstream is first formed into a portion 10a having a width L1 from the start to the latter half of the upper and lower roll regions 33a and 43a, and then the width is defined by the regions 33c and 43c.
- a gradually increasing portion 12a is formed, and a portion 11 having a width L2 is formed by the regions 33b and 43b.
- a region 12b whose width gradually decreases is formed by the regions 33d and 43d, and finally a region 10b having a width L1 is formed by the first half portion from the start point of the regions 33a and 43a.
- the portion 10a having the width L1 of the next product is formed.
- the product sent from the finishing roll after the final molding is completed is cut at the position to be the end (that is, the end of the part 10b) and conveyed to the next process such as product inspection, for example.
- the cutting position can be automatically determined by detecting, for example, a mark (for example, a small-diameter hole or protrusion) formed at intervals in the length direction of the sheet material or strip M with a sensor. Marks may be pre-applied to the sheet material or strip M at intervals corresponding to the length of the product, or may be applied during roll forming.
- the above-described upper and lower rolls 4 and 3 in which protrusions to be marks are formed at the position to be the starting point of the roll are used, and the mark is transferred together with the hat bending process. .
- FIG. 7 shows an example of the bead 14 and the protrusion 35 formed on the roll body to form the bead 14.
- the upper roll 4 is formed with a recess corresponding to the protrusion 35 via a gap corresponding to the thickness of the material.
- the shape, position, and number of beads and embosses can be changed as appropriate.
- the annular flange 33 Since the shape of the annular groove 42 is changed to a shape whose cross-sectional shape changes in the circumferential direction, the cross-sectional shape (that is, hat shape) changes in the longitudinal direction by simple control for synchronously rotating the upper and lower rolls 4, 3.
- the hat-shaped section steel 1 can be manufactured.
- the roll forming according to the present embodiment does not require a complicated control method for changing the roll width of a conventional divided roll, and does not require a new control device for that purpose. Therefore, for example, by replacing the roll of the existing roll forming apparatus with the upper and lower rolls 4 and 3 of the present embodiment, the roll forming apparatus of the present embodiment can be realized.
- the roll units 20a to 20k are arranged in a straight line, but if the roll units 20a to 20k are arranged in a tandem arrangement that is curved in the vertical direction, the roll units 20a to 20k are curved in the longitudinal direction. Hat shaped steel can also be manufactured.
- the roll body portion whose cross-sectional shape changes in the circumferential direction can be formed in a state where the roll body portion and the material are sufficiently in surface contact, for example, the material is a high-tensile steel material.
- the roll forming method and apparatus of the present embodiment can also apply an ultra high strength steel material having a tensile strength of 980 MPa or more.
- die roll shown in the above-mentioned 1st Embodiment is demonstrated.
- the outer diameter of the annular flange 33 (shaded portion) of the lower roll 3 and the outer diameter of the flank portion 43 (shaded portion) of the upper roll 4 are the same, and a relief described later is provided on the side wall of the annular flange 33 of the lower roll 3.
- the upper and lower rolls 4 and 3 of this embodiment are substantially the same as the upper and lower rolls 4 and 3 of the first embodiment, and the same components are denoted by the same reference numerals, and detailed description is omitted. To do.
- FIG. 9 is a partial longitudinal sectional view taken along a plane including the central axis of the upper and lower rolls 4 and 3.
- the gap between the bottom and side surfaces of the upper and lower rolls 4 and 3 facing each other is constant over the entire circumference in the circumferential direction.
- the side surface of the annular flange 33 of the lower roll 3 is escaped.
- the amount x is offset from the designed inner surface of the hat-shaped steel 1 inside the roll in the axial direction.
- the gap between the side surface of the annular flange portion 33 and the side surface of the annular groove portion 42 becomes closer to the root of the annular flange portion 33, that is, radially inward. Become wider.
- the broken line in the figure shows the side surface when no relief is provided.
- the escape amount x is preferably 1.4 mm or more. The method for determining the escape amount will be described later.
- FIG. 10 shows a comparison result of the gap between the upper and lower rolls 4 and 3 with and without escape. More specifically, FIG. 10 shows the minimum distance between the side surfaces in each phase when the starting point of the upper and lower rolls 4 and 3 (see FIG. 4) is 0 ° and the upper and lower rolls 4 and 3 are rotated every 5 °. (Minimum gap). As can be seen from FIG. 10, when the relief is not provided, the gap greatly changes (decreases and increases) in the region of about 45 ° to 65 ° and around 100 ° to 120 °.
- 11A and 11B are numerical analysis results showing the interference of the roll when no relief is provided, and show the area where the portion indicated by hatching interferes. The region where the gap changes corresponds to the transition portions 33c, 33d, 43c and 43d of the upper and lower rolls 4 and 3.
- the gap changes at the transition portions 33c, 33d, 43c, and 43d, but the amount of change is very small, and the gap is kept substantially constant throughout the entire range of 0 ° to 180 °. You can see that it is leaning. Although it depends on the thickness and shape of the shape steel, the preferable minimum gap in consideration of product standards is equal to or greater than the thickness of the plate. According to this embodiment, by providing relief on the side surface of the annular flange 33 of the lower roll 3, it is possible to ensure the minimum gap more than the plate thickness. Further, as a comparison, FIG. 10 shows a gap when relief is provided only in the transition portions 33c and 33d and no relief is provided in other regions. As can be seen from FIG. 10, the gap cannot be kept constant only by providing relief in only the transition portions 33c and 33d. Furthermore, the process of providing relief only at the transition portions 33c and 33d has a disadvantage that the operation is more difficult than the process of providing relief as a whole.
- the variation in the gap between the upper and lower rolls 4 and 3 in the circumferential direction may result in a variation in product thickness. Therefore, it is extremely effective that the clearance between the upper and lower rolls 4 and 3 in the circumferential direction can be made substantially constant by providing a relief that is offset inward in the axial direction of the roll on the side surface of the annular flange 33 of the lower roll 3. It is an effect. Furthermore, when the annular flange 33 is provided with a clearance, the gap can be kept substantially constant, and the occurrence of wrinkles can be prevented by suppressing the occurrence of material slippage on the side surface of the lower roll 3.
- the roll unit 20a at the final station may be provided with relief on the side surface of the annular flange 33 of the lower roll 3.
- the multistage roll forming apparatus 2 shown in FIG. 2 performs bending of the upper wall of the hat-shaped steel 1 in five steps from the sixth station to the final station (the tenth station). It is preferable to provide relief on the roll 3.
- the upper and lower rolls 4 and 3 of each station have different roll shapes (particularly, the gradient of the annular flange 33), and therefore each has a preferable escape amount.
- the escape amount x, the side wall angle ⁇ of the section steel, and the height H of the annular flange 33 are as shown in FIG. 13B. Referring to FIG. 11, it will be understood that the actual escape amount x is a value obtained by multiplying H ⁇ tan ⁇ by a constant ⁇ ( ⁇ ⁇ 1).
- FIG. 13C shows the minimum gap between the upper and lower rolls 4 and 3 when various relief amounts (0.1 mm intervals) are set with respect to the side wall angle ⁇ of the shape steel bent at each station. Yes. Then, based on the result shown in FIG. 13C, it was determined that molding was impossible when the clearance amount was such that the minimum gap was less than the thickness of the plate material, and the minimum value of the clearance amount x at which the minimum gap was equal to or greater than the thickness of the plate material was confirmed.
- the preferable escape amount x can be calculated from the above formula, for example, when it is desired to change the shape of the roll, the preferable escape amount x can be easily derived.
- an example will be described.
- the multi-stage roll forming apparatus 2 in FIG. 2 processes the flange in the first half process and bends the upper wall in the second half process (see FIG. 5).
- the upper wall is bent in the following five steps, one step is required. There is a concern that the amount of bend per unit is large, and in some cases, the material may crack.
- the multistage roll forming apparatus 2 shown in FIGS. 14 and 15 has a configuration in which the upper wall is bent stepwise in all the stations from the first station to the tenth station (final station). ing.
- the upper wall is bent stepwise in all the stations from the first station to the tenth station (final station). ing.
- all the rolls must be exchanged.
- the amount of bending per process can be reduced, there is an advantage that the material can be prevented from cracking. .
- the rolls from the sixth station to the ninth station are targeted, and in FIG. 17C, the rolls of the first station to the ninth station are targeted. That is, the constant ⁇ determined using the upper and lower rolls 4 and 3 of the final station is used to obtain the optimum escape amount x of the upper and lower rolls of other stations.
- This roll design method can be applied to rolls of various shapes, and of course can be applied to the roll shapes shown in the third to ninth embodiments described later.
- an R (R) is provided at the corner between the outer peripheral surface 37 and the side surface 39 of the annular flange 33 of the lower roll 3, and the corner is curved.
- a starting point of escape is arranged at a position where a straight line portion having a length L is provided along the side surface 39.
- a straight line 100 represents the inner surface of the designed hat-shaped steel 1. In this way, by providing a straight portion that does not provide relief along the inner surface of the designed hat-shaped steel 1 on the side surface 39 of the annular flange 33, the workpiece is the outer peripheral surface of the annular flange 33 of the lower roll 3.
- the shape of the upper and lower rolls 4 and 3 according to the above-mentioned embodiment is an example for manufacturing the hat-shaped steel 1 shown in FIG.
- the shape of the target product is limited to the hat-shaped section 1 shown in FIG.
- the inclination angles of the side walls may be different in the respective parts 10a to 12b, and a part having a width different from that of L1 and L2 may be further provided.
- 1 has a symmetrical shape in the left-right direction and the front-rear direction, but may be asymmetric in the left-right direction and the front-rear direction.
- the shape steel to be manufactured is not limited to the hat-shaped shape steel.
- the cross-sectional shape of the annular flange 33 can be made to be a quadrangle, and a section steel with a U-shaped cross-section can be manufactured, or the top of the annular flange 33 can be curved to have a U-shaped cross-section.
- the cross-sectional shape of the annular collar part 33 can be made into a triangle, and the cross-sectional shape can also manufacture a V-shaped steel.
- a U-shaped steel, U-shaped steel, or V-shaped steel whose cross-sectional shape changes in the longitudinal direction. Mold steel is formed. Further, for example, the shape may be changed to a different shape in the longitudinal direction, such as changing from a hat shape to a U shape.
- a modified example of the shape steel to be manufactured and an example of a finish roll for forming the shape steel will be described with reference to FIGS. 18A to 26B.
- FIG. 18A shows a hat-shaped section 1 whose width and height are constant and the cross-section moves in the lateral direction
- FIG. 18B shows upper and lower rolls 4 and 3 for finally forming the hat-shaped section 1 of FIG. 18A. That is, in the above-described first embodiment, a hat-shaped section steel having a straight material axis is manufactured, but in this embodiment, a hat-shaped steel 1 having a material axis curved in the width direction is manufactured. .
- the hat-shaped steel 1 has a part 15a where the material axis is linear and a part 15b where the material axis is curved.
- As a die roll for that purpose as shown in an example in FIG.
- upper and lower rolls 4 and 3 in which an annular flange portion and an annular groove portion are biased in the rotation axis direction are used.
- the overall configuration of the roll unit that rotationally drives the upper and lower rolls 4 and 3 can be the same as that of the first embodiment.
- a hat-shaped steel whose longitudinal cross-sectional shape is curved in the width direction by simple control of synchronously rotating the upper and lower rolls. Further, if the roll units 20a to 20k are arranged in a tandem arrangement that is curved in the vertical direction, a hat-shaped steel that is curved in the longitudinal direction can be manufactured.
- FIG. 19A shows a hat-shaped steel 1 in which the height is constant and the width of the cross-sectional shape changes to the left and right non-targets, and FIG. Rolls 4 and 3 are shown. That is, in the present embodiment, using the upper and lower rolls 4 and 3 shown in FIG. 18B, the hat-shaped section 1 in which one hat-shaped side wall 10c is constant but only the other side wall 10d is deformed in the width direction. Manufactured.
- the overall structure of the roll unit that rotationally drives the upper and lower rolls 4 and 3 can be the same as that of the first embodiment. Also in this case, it is possible to manufacture a hat-shaped steel in which the width of the cross-sectional shape in the longitudinal direction changes asymmetrically by simple control for synchronously rotating the upper and lower rolls 4 and 3.
- FIG. 20A shows a hat-shaped steel 1 having a constant height and a complicated cross-sectional width
- FIG. 20B shows the upper and lower rolls of the final station for the hat-shaped steel 1 shown in FIG. 20A.
- the hat-shaped steel 1 further including a portion having a width different from L1 and L2 is manufactured using the upper and lower rolls 4 and 3 shown in FIG. 20B.
- the hat-shaped steel 1 of the present embodiment has linear portions 16a and 16b and portions 16c to 16f having different widths.
- the overall structure of the roll unit that rotationally drives the upper and lower rolls 4 and 3 can be the same as that of the first embodiment.
- a hat-shaped steel whose width of the cross-sectional shape in the longitudinal direction changes in a complicated manner can be manufactured by simple control of rotating the upper and lower rolls 4 and 3 synchronously.
- FIG. 21A shows a U-shaped steel 6 having a constant height and varying cross-sectional shape
- FIG. 21B shows the upper and lower rolls 4 of the final station for the U-shaped steel 1 shown in FIG. 21A. 3 is shown.
- the U-shaped steel 6 of the present embodiment has a portion 61a where the height is constant and widens, and a portion 61b where the height is constant and decreases.
- the annular flange of the lower roll 3 has an inverted U-shaped cross section, and the width is expanded to a range of 0 ° to 180 ° in the circumferential direction, and 180 ° to 360 °.
- the width is reduced within the range.
- the annular groove portion of the upper roll 4 facing the lower roll 3 also has a U shape whose width increases and decreases in the circumferential direction.
- the overall structure of the roll unit that rotationally drives the upper and lower rolls 4 and 3 can be the same as that of the first embodiment. Also in this case, the U-shaped steel 6 in which the width of the cross-sectional shape in the longitudinal direction changes can be manufactured by simple control of rotating the upper and lower rolls 4 and 3 synchronously.
- the U-shaped steel 6 of FIGS. 22A and 22B is substantially the same as the U-shaped steel 6 of FIGS. 21A and 21B except that a flange portion 63 is provided. Also in this case, the U-shaped steel 6 in which the width of the cross-sectional shape in the longitudinal direction changes can be manufactured by simple control of rotating the upper and lower rolls 4 and 3 synchronously.
- This embodiment also manufactures a section steel having a U-shaped cross section.
- the fifth embodiment described above has a constant height
- a U-shaped steel 6 having a constant width and a varying height is manufactured. More specifically, the U-shaped steel 6 of the present embodiment has a portion 61c with a constant and increasing width and a portion 61d with a constant and decreasing width.
- FIG. 23B shows the upper and lower rolls 4, 3 of the final station for the U-shaped section 6 shown in FIG. 23A.
- the annular flange of the lower roll 3 has an inverted U-shaped cross section, and its outer diameter increases in the range of 0 ° to 180 ° in the circumferential direction, and the outer diameter is in the range of 180 ° to 360 °.
- the shape is reduced in diameter.
- the concave portion of the upper roll 4 facing the lower roll 3 is also U-shaped whose height changes in the circumferential direction.
- the overall structure of the roll unit that rotationally drives the upper and lower rolls 4 and 3 can be the same as that of the first embodiment. Also in this case, the U-shaped steel 6 in which the height of the cross-sectional shape in the longitudinal direction changes can be manufactured by simple control of rotating the upper and lower rolls 4 and 3 synchronously.
- the U-shaped steel 6 of FIGS. 24A and 24B is substantially the same as the U-shaped steel 6 of FIGS. 22A and 22B except that a flange 63 is provided. Also in this case, the U-shaped steel 6 in which the width of the cross-sectional shape in the longitudinal direction changes can be manufactured by simple control of rotating the upper and lower rolls 4 and 3 synchronously.
- FIG. 25A shows a V-shaped steel 7 having a constant cross-sectional width and varying height
- FIG. 25B shows the final station upper and lower rolls 4, 3 for the V-shaped steel 7 shown in FIG. 25A.
- the V-shaped shaped steel 7 of the present embodiment has a portion 71a having a constant and increasing width and a portion 71b having a constant and decreasing width.
- the annular collar portion of the lower roll 3 has a triangular outer shape (V shape), and its outer diameter increases in the range of 0 ° to 180 ° in the circumferential direction, and is 180 ° to 360 °.
- the outer diameter decreases in the range.
- the concave portion of the upper roll 4 facing the lower roll 3 also has a triangular shape (V shape) whose height changes in the circumferential direction.
- V shape triangular shape
- the overall structure of the roll unit that rotationally drives the upper and lower rolls 4 and 3 can be the same as that of the first embodiment. Also in this case, the V-shaped steel 7 in which the height of the cross-sectional shape in the longitudinal direction changes can be manufactured by simple control of rotating the upper and lower rolls 4 and 3 synchronously.
- FIG. 26A shows a hat-shaped section 1 in which both the width and height of the cross-sectional shape change
- FIG. 26B shows the upper and lower rolls 4, 3 of the final station for the hat-shaped section 1 having the shape shown in FIG. 26A.
- the hat-shaped steel 1 of the present embodiment includes a portion 17a having a cross-sectional width L1 and a height h1, and a portion 17b having a cross-sectional width L2 and a height h2.
- a portion 17c in which the width changes from L1 to L2 and the height changes from h1 to h2.
- the annular flanges and the annular groove portions of the upper and lower rolls 4 and 3 have shapes (L1 ⁇ L2 ⁇ L1, h1 ⁇ h2 ⁇ h1) in which both the height and width of the cross-sectional shape change in the circumferential direction.
- the overall structure of the roll unit that rotationally drives the upper and lower rolls 4 and 3 can be the same as that of the first embodiment.
- the hat-shaped steel 1 in which both the width and height of the cross-sectional shape change can be manufactured by simple control of rotating the upper and lower rolls 4 and 3 synchronously.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
前記第1金型ロールの環状畝部の側面に、周方向の全周に亘って、第2金型ロールの環状溝部の側面に対する隙間が半径方向内方に広くなるように逃げが設けられている形鋼の製造方法が提供される。
前記第1金型ロールと第2金型ロールは、両者間に前記シート材料の板厚に等しい間隙ができ、かつ、前記第1金型ロールの環状畝部と前記第2金型ロールの環状溝部とが嵌合するように相対的に配置されており、前記第1金型ロールの環状畝部の側面に、周方向の全周に亘って、第2金型ロールの環状溝部の側面に対する隙間が半径方向内方に広くなるように逃げが設けられているロール成形装置を要旨とする。
まず、本実施形態で製造する形鋼について説明する。図1に示す形鋼は、長手方向(例えば、材軸方向)に断面形状が変化する鞍型のハット型形鋼の一例である。図1Aはハット型形鋼を上方側から見た斜視図であり、図1Bは下方側から見た斜視図である。ハット型形鋼1は、上壁と、該上壁の両側縁部に沿って延設された側壁と、各側壁の反対側の縁部に沿って延設されたフランジ部とを具備して、ハット型形鋼1の長手方向に垂直な断面(横断面)が概ねハット型となっている。
続いて、上述の第1実施形態で示した金型ロールの変形例について説明する。
本実施形態の金型ロールでは、図8に示すように、下ロール3の環状畝部33(斜線の部分)の外径と、上ロール4のフランク部43(斜線の部分)の外径とは同一であり、かつ、下ロール3の環状畝部33の側壁に後述する逃げが設けられていることを特徴とする。この特徴的を除けば、本実施形態の上下ロール4、3は、第1実施形態の上下ロール4、3と概ね同一であり、同様の構成要素は同じ参照符号を付し、詳しい説明は省略する。
図18Aは、幅および高さが一定で断面が横方向に移動するハット型形鋼1を示し、図18Bは、図18Aのハット型形鋼1を最終成形する上下ロール4、3を示す。すなわち、上述の第1実施形態では、材軸が直線状となっているハット型形鋼を製造しているが、本実施形態では材軸が幅方向に湾曲したハット型形鋼1を製造する。このハット型形鋼1は、材軸が直線状の部位15aと、材軸が湾曲している部位15bとを有している。そのための金型ロールとして、図18Bに一例を示すように、環状畝部と環状溝部を回転軸方向に偏倚させた上下ロール4、3を用いる。上下ロール4、3を回転駆動するロールユニットの全体構成は、第1実施形態と同様の構成とすることができる。
図19Aは、高さが一定で断面形状の幅が左右非対象に変化するハット型形鋼1を示し、図19Bは、図19Aに示す左右非対象のハット型形鋼1を最終成形する上下ロール4、3を示す。すなわち、本実施形態では、図18Bに示す上下ロール4、3を用いて、ハット形状の一方の側壁10cは一定であるが、他方の側壁10dのみが幅方向に変形するハット型形鋼1が製造される。上下ロール4、3を回転駆動するロールユニットの全体構造は、第1実施形態と同様の構成とすることができる。この場合も、上下ロール4、3を同期回転させる簡単な制御によって、長手方向の断面形状の幅が左右非対称に変化するハット型形鋼を製造可能となる。
図20Aは、高さが一定で断面形状の幅が複雑に変化するハット型形鋼1を示し、図20Bは、図20Aに示すハット型形鋼1のための最終ステーションの上下ロールを示している。すなわち、本実施形態では、図20Bに示す上下ロール4、3を用いて、L1、L2とは異なる幅の部位を更に備えるハット型形鋼1が製造される。より詳細には、本実施形態のハット型形鋼1は、直線状の部位16a、16bと、幅がそれぞれ異なる部位16c~16fとを有する。上下ロール4、3を回転駆動するロールユニットの全体構造は、第1実施形態と同様の構成とすることができる。この場合も、上下ロール4、3を同期回転させる簡単な制御によって、長手方向の断面形状の幅が複雑に変化するハット型形鋼を製造することができる。
本実施形態では、断面がU字形状をなす形鋼が製造される。図21Aは、高さが一定で断面形状の幅が変化するU字型形鋼6を示しており、図21Bは、図21Aに示すU字型形鋼1のための最終ステーションの上下ロール4、3を示している。本実施形態のU字型形鋼6は、高さが一定で拡幅する部位61aと、高さが一定で減幅する部位61bとを有する。そのための金型ロールとして、下ロール3の環状畝部は、断面が逆U字形状となっており、周方向において0°~180°の範囲まで幅が拡大していき、180°~360°の範囲で幅が縮小していく形状となっている。下ロール3と対向する上ロール4の環状溝部も、周方向において幅が拡大および縮小していくU字形状となっている。上下ロール4、3を回転駆動するロールユニットの全体構造は、第1実施形態と同様の構成とすることができる。この場合も、上下ロール4、3を同期回転させる簡単な制御によって、長手方向の断面形状の幅が変化するU字型形鋼6を製造することができる。
図22A、22BのU字型形鋼6はフランジ部63を備えている点を除いて、図21A、21BのU字型形鋼6と略同一である。この場合も、上下ロール4、3を同期回転させる簡単な制御によって、長手方向の断面形状の幅が変化するU字型形鋼6を製造することができる。
本実施形態も、断面がU字形状をなす形鋼を製造する。但し、上述の第5実施形態が高さ一定であるのに対し、本実施形態では、図23Aに示すように、幅が一定で高さが変化するU字型形鋼6が製造される。より詳細には、本実施形態のU字型形鋼6は、幅が一定で高くなっていく部位61cと、幅が一定で低くなっていく部位61dを有する。図23Bは、図23Aに示すU字型形鋼6のための最終ステーションの上下ロール4、3を示す。下ロール3の環状畝部は、断面の外形が逆U字形状となっており、周方向において0°~180°の範囲まで外径が拡大していき、180°~360°の範囲で外径が縮小していく形状となっている。下ロール3と対向する上ロール4の凹状の部分も、周方向において高さが変化するU字形状となっている。上下ロール4、3を回転駆動するロールユニットの全体構造は、第1実施形態と同様の構成とすることができる。この場合も、上下ロール4、3を同期回転させる簡単な制御によって、長手方向の断面形状の高さが変化するU字型形鋼6を製造することができる。
図24A、24BのU字型形鋼6はフランジ部63を備えている点を除いて、図22A、22BのU字型形鋼6と略同一である。この場合も、上下ロール4、3を同期回転させる簡単な制御によって、長手方向の断面形状の幅が変化するU字型形鋼6を製造することができる。
本実施形態は、断面がV字形状をなす形鋼を製造する。図25Aは、断面形状の幅が一定で高さが変化するV字型形鋼7を示し、図25Bは、図25Aに示すV字型形鋼7のための最終ステーションの上下ロール4、3を示す。より詳細には、本実施形態のV字型形鋼7は、幅が一定で高くなっていく部位71aと、幅が一定で低くなっていく部位71bとを有する。下ロール3の環状畝部は、断面の外形が三角形状(V字形状)となっており、周方向において0°~180°の範囲まで外径が拡大していき、180°~360°の範囲で外径が縮小していく形状となっている。下ロール3と対向する上ロール4の凹状の部分も、周方向において高さが変化する三角形状(V字形状)となっている。上下ロール4、3を回転駆動するロールユニットの全体構造は、第1実施形態と同様の構成とすることができる。この場合も、上下ロール4、3を同期回転させる簡単な制御によって、長手方向の断面形状の高さが変化するV字型形鋼7を製造することができる。
図26Aは、断面形状の幅と高さの両方が変化するハット型形鋼1を示し、図26Bは、図26Aに示す形状のハット型形鋼1のための最終ステーションの上下ロール4、3を示す。より詳細には、本実施形態のハット型形鋼1は、断面形状の幅がL1であって高さがh1の部位17aと、断面形状の幅がL2であって高さがh2の部位17bと、幅がL1からL2および高さがh1からh2にそれぞれ変化する部位17cを有する。そのため、上下ロール4、3の環状畝部および環状溝部を、周方向に断面形状の高さと幅の両方が変化する形状(L1→L2→L1、h1→h2→h1)としている。上下ロール4、3を回転駆動するロールユニットの全体構造は、第1実施形態と同様の構成とすることができる。この場合も、上下ロール4、3を同期回転させる簡単な制御によって、断面形状の幅と高さの両方が変化するハット型形鋼1を製造することができる。
2 多段式ロール成形装置
3 下ロール
32 フランク部
33 環状畝部
4 上ロール
42 環状溝部
43 フランク部
Claims (11)
- 長手方向に断面形状が変化する形鋼をシート材料からロール成形によって製造する方法であって、
回転軸と、該回転軸を中心とする周方向に断面形状が変化する環状畝部とを有する第1金型ロール準備する段階と、
前記第1金型ロールの回転軸がシート材料の送り方向に対して垂直となるように該第1金型ロールを配置する段階と、
回転軸と、該回転軸を中心とする周方向に断面形状が変化する環状溝部とを有する第2金型ロールを準備する段階と、
前記第1金型ロールと第2金型ロールとの間に前記シート材料の板厚に等しい間隙ができ、かつ、前記第1金型ロールの環状畝部と前記第2金型ロールの環状溝部とが嵌合するように、前記第2金型ロールを配置する段階と、
前記第1金型ロールと前記第2金型ロールとを同期回転させる段階と、
前記第1金型ロールと第2金型ロールとの間にシート材料を給送する段階とを含み、
前記第1金型ロールの環状畝部の側面に、周方向の全周に亘って、第2金型ロールの環状溝部の側面に対する隙間が半径方向内方に広くなるように逃げが設けられていることを特徴とする形鋼の製造方法。 - 前記第1金型ロールの前記環状畝部および前記第2金型ロールの環状溝部の各々の前記回転軸方向に測定した幅寸法が周方向に変化する請求項1に記載の形鋼の製造方法。
- 前記第1金型ロールの前記環状畝部および前記第2金型ロールの環状溝部の各々の前記回転軸に対して垂直方向に測定した高さ寸法が周方向に変化する請求項1または2に記載の形鋼の製造方法。
- 前記形鋼は、第1金型ロールの環状畝部によって内周面が圧下され、第2金型ロールの環状溝部によって外周面が圧下されるハット型形鋼である請求項1~3の何れか1項に記載の形鋼の製造方法。
- 前記第1金型ロールの凸状の部分は、その周方向において、第1のロール幅の領域、第2のロール幅の領域、前記第1のロール幅から第2のロール幅に拡幅または減幅するテーパ状の領域を含んでいる請求項1~4の何れか1項に記載の形鋼の製造方法。
- 前記第1金型ロールは、その周方向において、環状畝部が回転軸方向に偏倚しており、材軸が幅方向に湾曲する形鋼を製造するようにした請求項1~4の何れか1項に記載の形鋼の製造方法。
- 前記第1金型ロールの側面の逃げ量xは、環状畝部の高さをH、形鋼の側壁角度をθ(θ<85°)としたときに、数式:x=α×H×tanθ(α:ロール形状によって定まる定数)で算出される値以上に設定されていることを特徴とする請求項1記載の形鋼の製造方法。
- 各々が第1金型ロールと第2金型ロールとを具備した複数のロールユニットをシート材料の送り方向に直列に配列し、これら複数のロールユニットによって側壁角度θ(但し、θ<85°)が段階的に大きくなるように材料を曲げ加工するにおいて、
一部または全部のロールユニットの第1金型ロールの側面の逃げ量xが、前記数式:x=α×H×tanθで算出される値以上となっている請求項7に記載の形鋼の製造方法。 - 前記第1金型ロールの環状畝部の外径と、前記第2金型ロールの凹状の底面の部分の外径が同一である請求項6~8の何れか1項に記載の形鋼の製造方法。
- 前記材料は、超高張力鋼材であることを特徴とする請求項1~9の何れか1項に記載の形鋼の製造方法。
- シート材料から長手方向に断面形状が変化する形鋼を製造するためのロール成形用のロール成形装置において、
回転軸と、該回転軸を中心とする周方向に断面形状が変化する環状畝部とを有する第1金型ロールであって、該第1金型ロールの前記回転軸がシート材料の送り方向に対して垂直となるように配置された第1金型ロールと、
回転軸と、該回転軸を中心とする周方向に断面形状が変化する環状溝部とを有する第2金型ロールであって、該第2金型ロールの前記回転軸が前記第1金型ロールの前記回転軸と平行になるなるように配置された第2金型ロールと、
前記第1金型ロールと前記第2金型ロールとを同期させて回転駆動する駆動装置とを具備し、
前記第1金型ロールと第2金型ロールは、両者間に前記シート材料の板厚に等しい間隙ができ、かつ、前記第1金型ロールの環状畝部と前記第2金型ロールの環状溝部とが嵌合するように相対的に配置されており、
前記第1金型ロールの環状畝部の側面に、周方向の全周に亘って、第2金型ロールの環状溝部の側面に対する隙間が半径方向内方に広くなるように逃げが設けられていることを特徴とするロール成形装置。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201280074872.1A CN104487184B (zh) | 2012-09-24 | 2012-09-24 | 截面形状沿着长边方向发生变化的型钢的制造方法及辊轧成形装置 |
PCT/JP2012/074443 WO2014045449A1 (ja) | 2012-09-24 | 2012-09-24 | 長手方向に断面形状が変化する形鋼の製造方法およびロール成形装置 |
US14/425,996 US9452459B2 (en) | 2012-09-24 | 2012-09-24 | Method for manufacturing shaped steel the cross-sectional shape of which changes in the longitudinal direction, and roll forming device |
IN1622DEN2015 IN2015DN01622A (ja) | 2012-09-24 | 2012-09-24 | |
KR1020147035719A KR101665225B1 (ko) | 2012-09-24 | 2012-09-24 | 길이 방향으로 단면 형상이 변화하는 형강의 제조 방법 및 롤 성형 장치 |
JP2013516047A JP5382267B1 (ja) | 2012-09-24 | 2012-09-24 | 長手方向に断面形状が変化する形鋼の製造方法およびロール成形装置 |
MX2015003023A MX363663B (es) | 2012-09-24 | 2012-09-24 | Método para producir acero conformado, la forma de sección transversal que cambia en la dirección longitudinal, y dispositivo de formación por rodillo. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2012/074443 WO2014045449A1 (ja) | 2012-09-24 | 2012-09-24 | 長手方向に断面形状が変化する形鋼の製造方法およびロール成形装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014045449A1 true WO2014045449A1 (ja) | 2014-03-27 |
Family
ID=50036552
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/074443 WO2014045449A1 (ja) | 2012-09-24 | 2012-09-24 | 長手方向に断面形状が変化する形鋼の製造方法およびロール成形装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US9452459B2 (ja) |
JP (1) | JP5382267B1 (ja) |
KR (1) | KR101665225B1 (ja) |
CN (1) | CN104487184B (ja) |
IN (1) | IN2015DN01622A (ja) |
MX (1) | MX363663B (ja) |
WO (1) | WO2014045449A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015205289A (ja) * | 2014-04-17 | 2015-11-19 | 新日鐵住金株式会社 | ロール成形方法 |
CN118180152A (zh) * | 2024-05-13 | 2024-06-14 | 索罗曼(广州)新材料有限公司 | 一种钛合金扁条冷轧成型装置 |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MX366386B (es) | 2013-10-18 | 2019-07-08 | Nippon Steel Corp | Metodo de produccion para lamina de acero que cambia la configuracion en seccion transversal en la direccion longitudinal, y dispositivo de moldeo por rodillo. |
CN104858268B (zh) * | 2014-02-24 | 2016-08-31 | 北方工业大学 | 一种定模动辊变截面辊弯成形机 |
DE102014116890A1 (de) * | 2014-11-18 | 2016-05-19 | Data M Sheet Metal Solutions Gmbh | Vorrichtung und Verfahren zur Herstellung von Profilen |
JP6342365B2 (ja) * | 2015-06-24 | 2018-06-13 | 三菱重工業株式会社 | ロール成形装置 |
KR101786260B1 (ko) | 2015-12-23 | 2017-10-18 | 주식회사 포스코 | 롤 스탬핑 장치 |
WO2017204388A1 (ko) * | 2016-05-27 | 2017-11-30 | (주)종합기계 | 호형 와이어 송급 장치 및 방법, 그리고 용접 설비 |
TWI597108B (zh) * | 2016-11-01 | 2017-09-01 | 財團法人金屬工業硏究發展中心 | 線上即時金屬板材輥軋曲彎成形回彈補償方法 |
CN111954580B (zh) * | 2018-03-30 | 2022-05-10 | 杰富意钢铁株式会社 | 钢板的端部弯曲方法及装置以及钢管的制造方法及设备 |
DE102018115740A1 (de) * | 2018-06-29 | 2020-01-02 | Airbus Operations Gmbh | Verfahren zum Herstellen eines Querträgers für ein Fahrzeug sowie ein Querträger für ein Fahrzeug |
US11453036B2 (en) * | 2019-07-18 | 2022-09-27 | Samuel, Son & Co., Limited | Shallow single plate steel tub girder |
CN110665989B (zh) * | 2019-10-10 | 2021-03-26 | 温州中希电工合金有限公司 | 一种侧面复合铜铝复合带的制备方法 |
CN115243804A (zh) * | 2020-03-10 | 2022-10-25 | 日本制铁株式会社 | 弯曲加工装置及加工方法、钢板桩的制造设备及制造方法 |
KR102192095B1 (ko) * | 2020-06-26 | 2020-12-16 | 권기준 | 금속판 절곡장치 |
US11401667B2 (en) * | 2020-08-12 | 2022-08-02 | Daniel STANCESCU | Modular orthotropic steel bridge deck |
KR102412105B1 (ko) * | 2020-09-17 | 2022-06-22 | 주식회사 포스코 | 롤 스탬핑 장치 |
CN114749482B (zh) * | 2022-04-12 | 2024-05-17 | 南京图信新材料科技有限公司 | 一种轨道用型钢成型机及轨道生产制造方法 |
CN115385137B (zh) * | 2022-09-01 | 2023-07-21 | 湖南鑫永生科技发展有限公司 | 一种槽钢自动生产线 |
CN115430713A (zh) * | 2022-09-02 | 2022-12-06 | 江苏众利达自动化设备有限公司 | 一种金属板轧制用轧辊 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5927722A (ja) * | 1982-08-07 | 1984-02-14 | Shiraki Kinzoku Kogyo Kk | ロ−ル成形装置 |
JPS59179228A (ja) * | 1983-03-31 | 1984-10-11 | Shiraki Kinzoku Kogyo Kk | ロ−ル成形装置 |
JPS63295019A (ja) * | 1987-05-27 | 1988-12-01 | Hitachi Metals Ltd | 複列成形ロ−ル |
JPH06226356A (ja) * | 1993-01-29 | 1994-08-16 | Aisin Seiki Co Ltd | ロール成形法 |
JPH0789353A (ja) * | 1993-04-19 | 1995-04-04 | Hashimoto Forming Ind Co Ltd | 異形横断面形状の長尺材、その製造方法および装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4317350A (en) | 1978-11-20 | 1982-03-02 | E. W. Sivachenko | Corrugated plate having variable material thickness and method for making same |
JPS57206522A (en) | 1981-06-12 | 1982-12-17 | Hitachi Ltd | Roll for roll forming machine |
FR2525504A1 (fr) * | 1982-04-27 | 1983-10-28 | Uk Nii Metallov | Cage pour les trains a fabriquer par cintrage des profiles en " u " avec ailes non paralleles |
JPS59183936A (ja) * | 1983-03-31 | 1984-10-19 | Shiraki Kinzoku Kogyo Kk | ロ−ル成形装置 |
JPH05329555A (ja) | 1992-06-02 | 1993-12-14 | Seiji Kojima | 密着曲げ加工機 |
JP3501482B2 (ja) | 1993-09-21 | 2004-03-02 | アイシン精機株式会社 | ロール成形方法、ロール成形装置のロール姿勢制御装置およびロール姿勢制御方法ならびにモールの製造方法 |
JP3608879B2 (ja) | 1996-07-26 | 2005-01-12 | カルソニックカンセイ株式会社 | 板材のロール成形方法 |
JPH10314848A (ja) | 1997-05-21 | 1998-12-02 | Wako Syst Eng Kk | ロール成形機 |
SE0501650L (sv) | 2005-07-11 | 2006-05-23 | Ortic 3D Ab | Förfarande för att rullforma en hattprofil och rullformningsmaskin |
JP4757820B2 (ja) | 2007-03-14 | 2011-08-24 | 新日本製鐵株式会社 | 形状凍結性に優れる多段プレス成形方法 |
-
2012
- 2012-09-24 US US14/425,996 patent/US9452459B2/en active Active
- 2012-09-24 KR KR1020147035719A patent/KR101665225B1/ko active IP Right Grant
- 2012-09-24 JP JP2013516047A patent/JP5382267B1/ja active Active
- 2012-09-24 WO PCT/JP2012/074443 patent/WO2014045449A1/ja active Application Filing
- 2012-09-24 MX MX2015003023A patent/MX363663B/es unknown
- 2012-09-24 CN CN201280074872.1A patent/CN104487184B/zh active Active
- 2012-09-24 IN IN1622DEN2015 patent/IN2015DN01622A/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5927722A (ja) * | 1982-08-07 | 1984-02-14 | Shiraki Kinzoku Kogyo Kk | ロ−ル成形装置 |
JPS59179228A (ja) * | 1983-03-31 | 1984-10-11 | Shiraki Kinzoku Kogyo Kk | ロ−ル成形装置 |
JPS63295019A (ja) * | 1987-05-27 | 1988-12-01 | Hitachi Metals Ltd | 複列成形ロ−ル |
JPH06226356A (ja) * | 1993-01-29 | 1994-08-16 | Aisin Seiki Co Ltd | ロール成形法 |
JPH0789353A (ja) * | 1993-04-19 | 1995-04-04 | Hashimoto Forming Ind Co Ltd | 異形横断面形状の長尺材、その製造方法および装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015205289A (ja) * | 2014-04-17 | 2015-11-19 | 新日鐵住金株式会社 | ロール成形方法 |
CN118180152A (zh) * | 2024-05-13 | 2024-06-14 | 索罗曼(广州)新材料有限公司 | 一种钛合金扁条冷轧成型装置 |
Also Published As
Publication number | Publication date |
---|---|
KR101665225B1 (ko) | 2016-10-11 |
CN104487184A (zh) | 2015-04-01 |
MX363663B (es) | 2019-03-28 |
IN2015DN01622A (ja) | 2015-07-03 |
US20150251234A1 (en) | 2015-09-10 |
MX2015003023A (es) | 2015-07-14 |
JPWO2014045449A1 (ja) | 2016-08-18 |
US9452459B2 (en) | 2016-09-27 |
KR20150013859A (ko) | 2015-02-05 |
CN104487184B (zh) | 2017-05-03 |
JP5382267B1 (ja) | 2014-01-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5382267B1 (ja) | 長手方向に断面形状が変化する形鋼の製造方法およびロール成形装置 | |
JP5668896B1 (ja) | 長手方向に断面形状が変化する形鋼の製造方法およびロール成形装置 | |
EP2127774B1 (en) | Apparatus and method for press-bending tube material | |
US9174258B2 (en) | Apparatus and process for forming profiles with a variable height by means of cold rolling | |
CN105246608B (zh) | 焊接钢管的制造方法 | |
JP2011045923A (ja) | 差厚金属板及びその製造方法 | |
JP4376602B2 (ja) | 金属材料の加工方法及び金属加工品 | |
EP2883627A1 (en) | Method for manufacturing steel pipe | |
TWI574752B (zh) | A method of manufacturing a steel sheet having a cross-sectional shape in the direction of the long side and a roll forming apparatus | |
US8336356B2 (en) | Apparatus and process for reducing profile variations in sheet metal stock | |
RU2508957C1 (ru) | Способ получения изделий с криволинейными участками из профильных труб | |
TWI513522B (zh) | A method for manufacturing a steel sheet having a cross-sectional shape as a cap shape, and a roll forming apparatus for forming a steel sheet having a cross-sectional shape | |
JP6547706B2 (ja) | 直線形鋼矢板の曲がり矯正方法及び曲がり矯正装置 | |
EP3388160A1 (en) | Method for producing steel h-beam, and rolling mill | |
JP7127729B2 (ja) | 鋼矢板の製造方法及び鋼矢板製造用の圧延設備列 | |
JP5854036B2 (ja) | 形鋼の曲がり矯正方法 | |
CN112638558B (zh) | 钢管的制造方法及冲压模具 | |
RU2503516C2 (ru) | Способ изготовления профилей с перфорированными отверстиями | |
WO2013153680A1 (ja) | 曲がり形状を有する閉断面構造部品の製造方法及び装置 | |
JP2014184455A (ja) | 形鋼の製造設備及び形鋼の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 2013516047 Country of ref document: JP Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12884847 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20147035719 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14425996 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: MX/A/2015/003023 Country of ref document: MX |
|
WWE | Wipo information: entry into national phase |
Ref document number: IDP00201501670 Country of ref document: ID |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 12884847 Country of ref document: EP Kind code of ref document: A1 |