WO1996002333A1 - Laminoir pour la production de cornieres d'acier a partir de feuillards d'acier et procede de laminage de cornieres d'acier au moyen dudit laminoir - Google Patents
Laminoir pour la production de cornieres d'acier a partir de feuillards d'acier et procede de laminage de cornieres d'acier au moyen dudit laminoir Download PDFInfo
- Publication number
- WO1996002333A1 WO1996002333A1 PCT/JP1995/001402 JP9501402W WO9602333A1 WO 1996002333 A1 WO1996002333 A1 WO 1996002333A1 JP 9501402 W JP9501402 W JP 9501402W WO 9602333 A1 WO9602333 A1 WO 9602333A1
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- Prior art keywords
- rolling
- steel strip
- mill
- roll
- steel
- Prior art date
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 162
- 239000010959 steel Substances 0.000 title claims abstract description 162
- 238000005096 rolling process Methods 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 229910000746 Structural steel Inorganic materials 0.000 claims description 63
- 238000004519 manufacturing process Methods 0.000 claims description 25
- 238000005485 electric heating Methods 0.000 claims description 15
- 229910001220 stainless steel Inorganic materials 0.000 claims description 15
- 239000010935 stainless steel Substances 0.000 claims description 15
- 235000000396 iron Nutrition 0.000 claims description 13
- 238000010791 quenching Methods 0.000 claims description 2
- 230000000171 quenching effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 35
- 238000010586 diagram Methods 0.000 description 31
- 238000005098 hot rolling Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000013058 crude material Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000007958 sleep Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- B21B1/09—L-sections
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
- B21B2261/21—Temperature profile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
Definitions
- the present invention particularly relates to a hot rolling apparatus for manufacturing a stainless steel angle steel having a cross-sectional shape with a small outer radius at a corner from a steel strip, and a rolling method using the apparatus.
- Angle irons have long been used as structural members.
- FIG. 1 is a diagram showing an example of a cross section of an angle iron manufactured by hot rolling.
- A is the length of one side of the flange (hereinafter, A is called “flange”)
- t is the thickness of the flange
- r 2 is the outer radius of the corner.
- JIS Japanese Industrial Standards
- the outer radius r 2 of the corner portion of the crest is unspecified.
- stainless steel angle iron used such as kitchen or chemical Brandt, to ensure this at beautiful of appearance of the fabricated structures, the outer radius r 2 1 ⁇ of a corner portion of the crest ( Hereinafter, it is simply referred to as “sharp edge”.)
- angle irons There are two main types of methods for manufacturing angle irons, one is a method of manufacturing hot rolled steel from a continuous mill or the like by a hole mill, and the other is a roll forming (bending) machine from a steel strip. This is a method of manufacturing light angle steel in the cold or hot.
- the “steel strip” is a narrow strip-shaped sheet material obtained by slitting a wide steel plate in the longitudinal direction.
- Fig. 2 is a diagram showing a rolling roll hole shape (pass schedule) when an angle iron is manufactured by hot hole rolling.
- Manufacture of angle iron is a continuous production bloom (Billet) is used as a material, and it is rolled by hot rolling in 7 to 8 or more passes using a mill having 7 to 8 holes, and the material is formed into a mountain shape as shown in Fig. 1. Is done.
- Japanese Patent Application Laid-Open No. Hei 5-237503 discloses a method in which a forming roll is arranged in front of a hole-shaped roll, and a ridge is bent with the forming roll to form a stainless steel sheet having excellent surface properties. A method for producing angle iron has been proposed.
- FIG. 3 is a diagram illustrating a method of manufacturing an angle iron from a steel strip by cold forming.
- the outer radius of the corner is about twice the plate thickness.
- the outer radius r 2 of the co over Na part is 3 ⁇
- the angle iron such as for the kitchen use Not suitable for
- the thickness B of the corner of the angle iron is approximately 1.5 times or more the thickness t of the flange. I need. Therefore, if a steel strip with the same thickness as the flange thickness of the product was used, E-rolling of the angle steel with the desired sharp edge was impossible. To achieve this, it is necessary to use a steel strip with a thickness greater than the corner thickness.
- FIG. 4 is a diagram showing the production of an angle steel rough section from a steel strip having a thickness greater than the thickness of a part of the corner, and (a) shows a cross section of the rolled rough section.
- FIG. 3) is a diagram showing an edge wave generated in a rough material.
- the method of rolling angle irons which is formed by hot rolling using a rolling device having a hole shape as shown in Fig. 2, is not suitable for producing small-sized stainless steel angle irons.
- an angle iron having a flange length of 30 ram and a thickness of 3 (hereinafter, such an angle iron is referred to as “30 X 30 X 3”) is a series of sections each having a side of 120 strokes. ⁇
- the billet must be passed through these molds at least 15 times (15 passes).
- the rolling finish temperature drops to 800 ° C or less, the workability of the material deteriorates, and the surface properties of the product deteriorate. In order to eliminate this, reheating is required during rolling, resulting in lower rolling efficiency.
- an angle steel having a sharp edge cannot be manufactured by a method of bending a steel strip as a raw material in a cold or hot manner.
- edge waves are generated when the rolling is severely reduced. To prevent this, it is necessary to reduce the rolling depth, which increases the number of rolling passes and increases equipment costs.
- the method of providing a forming roll in front of a grooved roll has a problem that a corner portion is reduced in thickness, a sharp edge cannot be obtained, and rolling equipment becomes complicated.
- the angle iron having a sharp edge as described above can be obtained by a slot rolling machine from a forged billet.
- the number of rolling passes increases, and the surface properties deteriorate. Disclosure of the invention
- An object of the present invention is to provide a rolling mill for manufacturing angle steel having a good surface condition and sharp edges from a steel strip having a thickness equivalent to the flange thickness of a product by hot rolling, and an inexpensive rolling mill using the rolling mill.
- An object of the present invention is to provide a rolling method.
- the present inventor used a universal mill in which a vertical roll having a slot type on the roll surface and a horizontal roll having a slot type in the center in the longitudinal direction of the roll were used. The authors completed the present invention by confirming that reducing the thickness allows the thickness at the center of the sheet width to be increased without generating edge waves.
- the gist of the present invention lies in a rolling apparatus shown in FIGS. 5 to 8 and a method of rolling an angle steel from a steel strip using the same.
- a heating device (H) for heating a running steel strip (S), a universal mill (U), and a group of double hole mills (R) are arranged close to each other.
- the universal mill (U1) has a pair of vertical holes (3.3) having a slot type (13) on the roll surface and a pair of water (12) having a slot type (12) at the center of one roll surface. Rolling mill with flat rolls (1.2).
- the other roll of the universal mill (the lower horizontal roll 2 ′ in FIG. 6 (b) described later) is desirably provided with a projection (14) at the center in the longitudinal direction.
- heating device is a power supply roll (7, 8), an insulated universal mill (U), and a grounded double-hole mill (R) (see Fig. 8).
- the electric heating device consists of two sets of power supply rolls (7, 8), and one power supply port (7) is provided with a device that moves the power supply rolls in the running direction of the steel strip.
- the roll (8) is equipped with a roll release device (see Fig. 8).
- a universal mill equipped with a pair of vertical rolls (3, 3) having a slot type (13) on the surface and a pair of horizontal rolls having a slot type (12) in the center of one of the rolls, A method of rolling angle steel by rolling down a steel strip in the width direction and in the thickness direction to increase the thickness at the center of the sheet width, and then using a double-hole mill to finish it into an angle shape.
- the steel strip is widthwise moved by a universal mill in which a pair of vertical rolls with a slot type on the surface and a pair of horizontal rolls with a slot type are placed at the center of one of the rolls while applying electric heating at And down in the thickness direction.
- a universal mill in which a pair of vertical rolls with a slot type on the surface and a pair of horizontal rolls with a slot type are placed at the center of one of the rolls while applying electric heating at And down in the thickness direction.
- FIG. 1 is a diagram showing an example of a cross-sectional shape of an angle iron
- FIG. 2 is a diagram showing an example of a hole shape and a pass schedule by a conventional hole rolling.
- FIG. 3 is a diagram showing a method of manufacturing an angle iron from a steel strip by cold forming.
- Fig. 4 is a diagram showing a situation where a rough material is manufactured by rolling down both ends of a steel strip.
- (A) is a diagram showing a cross section of the rough material formed by groove rolling
- (b) is a diagram showing a rough shape. It is a figure showing the edge wave generated in the material.
- FIGS. 5A and 5B are diagrams showing an example of a rolling device for producing angle iron from a steel strip according to the present invention.
- FIG. 5A is a diagram showing a rolling line
- FIG. It is a figure which shows the cross section of a material.
- FIGS. 6A and 6B are diagrams showing another example of a rolling device for producing angle iron from a steel strip according to the present invention, wherein FIG. 6A is a diagram showing a rolling line, and FIG. FIG. 3 is a diagram showing a cross section of a rolled material.
- Fig. 7 is a view showing a rolling device for angle iron using electric heating
- Fig. 8 is a diagram showing a rolling device for angle iron in which a grounded double-hole mill is arranged.
- Figure 10 is a diagram showing the buckling mode accompanying width reduction when both ends of the steel strip are constrained.
- Figure 9 shows the case where 10 bandits were restrained, and
- Figure 10 shows the case where 3 bands were hidden.
- Fig. 11 is a diagram showing the buckling mode caused by width reduction when both ends of the steel strip are not restrained.
- Fig. 12 is a diagram showing the arrangement of rolls of a universal mill for performing a width reduction test and a cross section of a rolled material.
- Fig. 13 shows the relationship between the width reduction ratio obtained in the width reduction test and the thickness increase rate at the center.
- FIG. 14 is a diagram showing a rolling device for an angle steel in which a temperature control device for a steel strip is arranged at a preceding stage of a universal mill.
- the rolling device for manufacturing the angle iron by changing the roll shape of the conventional universal mill, at least two-pass rolling is performed from a steel strip having a thickness equal to the flange thickness of the product angle iron. Can roll the target product.
- FIG. 9 is a view showing a deformation state of the steel strip when both ends of the steel strip are restrained by 10 mm in the slot type and pressed down in the width direction.
- FIG. 10 is a diagram showing a deformation state of the steel strip when both ends of the steel strip are restrained three times in a slot type and pressed down in the width direction.
- the buckling mode when the amount of restraint is 3 is W-shaped (reverse W-shaped in the illustration), and the part that is deviated left and right from the center of the plate width is bent.
- Fig. 11 is a diagram showing a buckling mode accompanying width reduction when both ends of the steel strip are not constrained. When both ends of the steel strip S are not restrained, both ends are bent as shown in the figure.
- FIG. 12 is a diagram showing the roll arrangement of the universal mill used for the test and the cross section of the material to be rolled.
- the vertical rolls 3 'and 3' have two types of slots with a circumference of 400 OD, a groove bottom width of 5 mm, an inclination angle of 8 °, a depth of 3 and a depth of 10 mm.
- the mold 13 is formed, and the upper horizontal roll 1 is formed with a slot type 12 having a width of a groove bottom of 20 mm and a depth of 8 concealed around a circumference of 400 outer diameters.
- stainless steel (SUS 304) with a thickness of 5 o'clock and a width of 100 o'clock (however, when the groove depth is 10 mm, and when the groove depth is 3 mm, 85 o'clock) is used as the band S.
- the roll opening G at both ends of the horizontal roll was set to 5 mm, and a rolling test was performed by changing the amount of reduction in the width direction with a vertical roll.
- the rolled material M ' is that succumbed c seat buckled in plate width central portion as described above to be reduction in the width direction, a horizontal upper slot die 12 is formed in a center portion of the roll longitudinal direction It is rolled down by Roll 1 and fills the space (slot-type part), increasing the thickness at the center of the plate width.
- FIG. 13 is a diagram showing the relationship between the reduction ratio and the thickness increase ratio when a width reduction rolling test of a steel strip is performed using a universal mill having a slot type on the roll surface.
- the curve indicated by ⁇ is when the groove depth of the vertical roll is set to 10 and the curve indicated by Hata is when 3 is hidden. It can be seen that increasing the groove depth increases the rate of increase in the thickness of the central part of the steel strip. ⁇ These results show that a pair of vertical rolls with a slotted hole on the roll surface are used for both ends of the steel strip.
- the thickness of the center of the steel strip increases. Molding and rolling can be performed. By subjecting this to finish rolling in a double-hole mill, angle irons with sharp edges can be obtained. That is, it is possible to manufacture an angle iron having a sharp edge from a steel strip having a thickness equal to the flange thickness of the angle iron.
- FIG. 5 is a diagram showing an example of a rolling device for producing angle iron from a steel strip according to the present invention, wherein (a) is a diagram showing a rolling line, and () is the roll arrangement of a universal mill and a cross section of a material to be rolled.
- FIG. S is a steel strip
- H is a heating device equipped with a continuous heating furnace HI
- U is a universal mill
- R is a first-stage double-hole forming mill R1 and a second-stage double-hole finishing mill R2, which are arranged in close proximity 2
- Double hole mill group D is cutting machine
- M is product
- universal mill and double hole mill group are arranged close to each other in the rolling direction.
- “closely arranged” means a state in which there is no table roll between the two, and both stands are arranged continuously.
- the steel strip S is heated in the continuous heating furnace HI, shaped by the universal mill U to reduce the material width and increase the thickness at the center, and then finished into angle iron by the double hole mill group R. Rolled.
- the feature of the universal mill U1 shown in Fig. 5 (b) is that the vertical roll 3 is provided with a slot 13 on the outer periphery of the roll so that both ends of the material to be rolled M 'can be gripped and pressed down in the width direction.
- the horizontal roll has at least one roll (in this case, the upper horizontal roll 1) .
- a slot 12 is provided at the center in the longitudinal direction of the outer periphery, and the buckled material is pressed down in the width direction by the vertical roll. Is a structure that can be moved to the center.
- slot type 13 is formed in the vertical roll 3, when the material to be rolled M 'is rolled down in the sheet width direction, buckling occurs in the center of the width of the material to be rolled, and in the rolling direction, Since it is not stretched, it moves to the center in the width direction and increases its thickness along the shape of the horizontal roll.
- the steel strip S is heated in the continuous heating furnace HI, and is rolled down in the width direction by a universal mill U1 equipped with rolls as shown in Fig. 5 (b). Then, a shape corresponding to the shape shown in pass 5 of FIG. 2 is formed. Next, intermediate rolling is performed by forming the central portion of the steel strip into an “inverted V-shape” by a first-stage double-hole-type forming mill engraved with a grooved roll shown in pass 6 in FIG. Furthermore, to form a right angle and a sharp edge of the flange by a two-high grooved finish mill R 2 which engraved the caliber shown in path 7 in FIG. 2, finish angle iron product.
- an angle steel having excellent sharpness and excellent surface properties can be produced from a steel strip having a thickness equal to the flange thickness of the product angle iron by three-pass rolling.
- FIG. 6 is a diagram showing another example of a rolling device for producing angle iron from the steel strip of the present invention, wherein (a) is a diagram showing a rolling line, and (b) is a roll arrangement of a universal mill. It is a figure which shows the cross section of a to-be-rolled material.
- the characteristics of the universal mill shown in Fig. 2 (b) are that a slot die 12 is formed at the center of the outer peripheral surface of one horizontal roll ⁇ , and a projection 14 is formed at the center of the outer peripheral surface of one horizontal roll 2 '. This is because the rolled material M ', which is provided and rolled down in the width direction, is moved to the center.
- the steel strip S After heating a steel strip S that has a width equal to or more than twice the flange width of the angle iron and is equal to the flange thickness, the steel strip S is heated down in the sheet width direction using a universal mill U2 as shown in Fig. 6 (b).
- a universal mill U2 as shown in Fig. 6 (b).
- a slot type 12 is formed at the center of the upper horizontal roll ⁇ , and a projection 14 is formed at the lower horizontal roll 2 ′. Since restraining a, c which reduction rate in the plate width direction (reduced amount of area) is to increase the thickness of the center portion
- This shape corresponds to the shape formed by pass 6 shown in FIG.
- the subsequent double-hole finishing mill R2 it is only necessary to carry out shape rolling.
- the material to be rolled by the universal versatile mill U is similar to the shape of the material rolled in pass 6 shown in Fig. 2, and the double hole finishing mill R2 is simply a squareness and sharp edge of the flange. Only need to be formed.
- the angle at the corner of the angle iron is about 50% larger than that at the flange, and a corner is provided, so that the angle iron can be formed by relatively light rolling. This makes it possible to manufacture angle irons with good surface properties.
- FIG. 7 is a diagram showing an apparatus for manufacturing angle iron using electric heating.
- H is a heating device consisting of a direct current heating device H2 in which two sets of power supply rolls 7, 8 sandwich the steel strip up and down in the running direction of the steel strip, 9 is a power supply, U2 is a universal mill, R2 is a double hole type Mills, S is the ⁇ band, M is the product angle iron.
- Universal Mill U2 has a universal mill U2 consisting of a horizontal roll ⁇ with a slot type and a horizontal roll 2 'with a projection, or a horizontal roll with a slot type and a flat horizontal roll.
- the finishing mill R2 is arranged in the case of the universal mill U2, and the forming hole mill R1 and the finishing mill R2 are arranged in the case of the universal mill U1.
- the direct heating method can sufficiently cope with a production capacity of 0.2 m / s, and is the most suitable heating method for small stainless steel angle irons ( E. About moving:
- FIG. 8 is a diagram showing a rolling mill for an angle iron in which a movable power supply roll, a releasable power supply roll, an insulated universal mill, and a grounded double-hole finishing mill are arranged.
- Reference numeral 10 in the figure denotes a power supply roll capable of moving in the running direction of the steel strip
- reference numeral 11 in the figure denotes a power supply roll having a mouth opening device for cutting off contact with the steel strip.
- the power supply roll 10 is brought close to the power supply roll 11 to the position shown by the broken line in FIG. 8, and when the steel strip enters the power supply roll 11, the traveling of the steel strip is stopped, and the power supply roll 10 is moved along the steel strip. Energize the steel strip while moving in the opposite direction (to the position shown by the solid line). When the temperature of the steel strip near the power supply roll 11 reaches a predetermined temperature, the movement of the power supply roll 10 is stopped, and the steel strip is run at the same time. When the steel strip penetrates into the hole-type finishing mill R2, the power supply roll 11 is opened up and down, and current is heated between the power supply roll 10 and the hole-type finishing mill R2. Thus, the steel strip can be heated to a predetermined rolling temperature from the leading end in the running direction.
- a device for moving the power supply roll for example, a known ball screw device or a device for moving the power supply roll on a sliding support table using a pressure cylinder such as a hydraulic or pneumatic pressure can be used.
- the roll When moving, the roll may be driven to rotate, or may be rotated following the steel strip.
- the device for opening the power supply roll up and down may be a device using a pressure cylinder such as a hydraulic or pneumatic device, or a device using a pressure cylinder and a panel or a link mechanism.
- F. Insulating the universal mill and grounding the double-hole mill In rolling small angle irons using a continuous heating furnace or a rolling machine equipped with a normal electric heating device, the The temperature drop is large, and the surface properties of the product deteriorate. However, as shown in Fig. 8, when the universal mill is insulated and the double-hole finishing mill is grounded and energized from the power supply roll 10, the steel strip can be used immediately below the universal mill U2 and the double-hole finishing mill R2. Can be heated. The insulation of the universal mill was performed by laying an insulation mat on the base of the rolling mill and using an insulating force ring on the power drive shaft.
- the present invention is characterized in that the thickness of the central portion of the steel strip is increased by rolling down the steel strip in the width direction. To increase the thickness of the central part of the steel strip, it is necessary to increase the deformation at that part and raise the temperature at the central part.
- Figure 14 shows a rolling mill for angle irons, in which a steel strip temperature control device is placed in front of the universal mill.
- D is a temperature control device, for example, a wheel set arranged so that two discs (DL DS or D 3 , D 4 ) can change their distance via a shaft (D 6 , D E )
- the steel strip is sandwiched at both ends and rotated following the running of the steel strip. This makes it possible to lower the temperature at both ends of the steel strip by about 200 ° C from the center.
- the thickness of the central part of the steel strip can be increased, so that steel with a shape equal to the flange thickness of the product angle iron and as close to twice the flange width as possible Angle iron can be manufactured from the strip.
- the manufacturing method of the angle iron according to the present invention is as follows. Using a universal mill with a slotted hole, the steel strip is rolled down in the width direction and subjected to shaping and rolling to increase the thickness at the center, and then one or two passes are performed by the double-hole type mill group. Perform rolling.
- the required rolling time is as short as 10 seconds or less, and even if the heating temperature is 950 ° C, a finish rolling temperature of 800 ° C or more can be ensured, making it possible to manufacture angle irons with excellent surface properties. Become. Further, by arranging the direct current heating device, the finish rolling temperature can be increased, so that the product can be subjected to a solution treatment for rapidly quenching directly after rolling. (Example 1)
- the rolling mill has a universal mill U1 (roll diameter 300 mm, horizontal roll diameter 400 mm) with roll shape as shown in Fig. 5 (b), and pass 6 and pass 7 as shown in Fig. 2.
- a steel strip of stainless steel (SUS 304) having a thickness of 4.5 mm and a width of 110 mm was used, and a 40 X 40 X 4 angle steel was manufactured by three-pass rolling.
- the vertical roll 3 of the universal mill is engraved with a trapezoidal hole with a groove bottom radiation of 4.5 mm, a groove depth of 10 countries, and a groove inclined angle of 5 °.
- the upper horizontal roll has an opening width of 30 ram.
- a valley-shaped hole with a depth of 8 mm and a bottom radius of 10 mm is carved.
- the former double-hole forming mill R1 has a bath 6 shown in FIG. 2 and the finishing mill R2 has a path 7 shown in FIG.
- the above steel strip is heated to 950 ° C in a continuous heating furnace HI, and the width of the steel strip is reduced by 75 using a universal mill U1 as shown in Fig. 5 (b), and the thickness at the center is 8 mm at the maximum.
- Rolling was carried out.
- intermediate rolling was performed by bending the central part of the material to be rolled into an ⁇ inverted V-shape '' using the double-hole forming mill R1, and was further shaped and rolled into angle iron 40X40X4 using the same finishing mill R2. .
- the outer radius of the corner of the obtained angle iron was 1.0 stroke, and the surface properties of the flange were also good.
- a rolling speed of 5 m / s was obtained, and the production efficiency was 40 ton / hr. This is about twice that of the conventional rolling method (4 stand, cross country mill).
- a rolling device As a rolling device, a double-type hole with a roll shape as shown in Fig. 6 (b), a universal mill U2 (vertical roll diameter 300 ram, horizontal roll diameter 400 mm) and a hole shape of pass 7 shown in Fig. 2 A rolling mill shown in FIG. 6A in which a mold mill R2 (roll diameter: 400 mm) was arranged was used.
- the material used was the same steel strip as in Example 1, and a 40X40X4 angle iron was manufactured by rolling in two passes.
- the vertical roll of the Universal Mill U2 is engraved with a trapezoidal hole with a groove bottom width of 4.5 mm, a groove depth of 10 strokes, and a groove inclined angle of 5 ° .
- the upper horizontal roll has an opening width of 30 mm, depth
- a valley-shaped hole with a depth of 8 mm and a radius of 10 at the bottom is engraved.
- the tip At the center of the lower horizontal ⁇ -rule, the tip has a radius equal to the fillet radius of the angle iron, and a height of 2 mm.
- a 10-mm-wide protrusion at the foot is provided.
- the double hole type finishing mill R2 has a hole shape for pass 7 shown in Fig. 2.
- a steel strip of stainless steel (SUS 304) with a width of 110 mm and a thickness of 4.0 mm is heated up to 950 in a continuous heating furnace HI, and the width of the steel strip is reduced by 75 mm using a universal mill U2. Rolling to increase the height to 8 o'clock.
- the projection 14 is provided at the center of the lower horizontal roll 2, the cross-section of the coarse material is equal to the shape similar to the path 6 shown in FIG. Therefore, with a double groove mill, it is possible to finish the angle irons 40X 40X 4 only by groove rolling as shown in pass ⁇ of FIG.
- the outer radius of the corner of the obtained angle iron was l.Oi, and the surface properties of the flange were also good. Also, a rolling speed of 5 m / s was obtained, and the production efficiency was 40 ton / hr.
- Example 3 Using an angle steel rolling mill equipped with an electric heating device as shown in Fig. 7, a 30 x 30 x 3 angle steel was manufactured from a steel strip (stainless steel, SUS304) with a thickness of 4 mm and a width of 75 strokes.
- the rolling mill used in Example 2 was used for the universal mill and the double hole mill.
- the steel strip is energized between the two feeding rolls 7 and 8 and heated so that the temperature at the outlet side of the feeding port 8 is 1100 ° C, and then the width of the steel strip is reduced from 75 to 60 with a universal mill.
- the size of the central part was increased to 4.5 mm at the maximum by reducing the size of the band to a marauder (15-sleep reduction). Then, the thickness of the flange was reduced to 3 o'clock by the finishing mill R2 to obtain an angle iron.
- the rolling speed when using the electric heating method is 0.2 m / s, which is lower in production efficiency than the continuous heating furnace method.
- the equipment cost of the electric heating equipment is less than 1/10 of that of the continuous heating furnace, and this is the optimal heating method when a new rolling mill is installed for a small stainless steel angle iron with a small demand.
- a 20 x 20 x 3 angle steel was manufactured from a steel strip (stainless steel, SUS304) with a thickness of 4 mm and a width of 50 sleeps.
- the steel strip is run in a state where the front-stage power supply roll 10 is close to the rear-stage power supply roll 11 (the state shown by the broken line), and the steel strip is stopped when the steel strip enters the rear-stage power supply roll 11. Meanwhile, power is supplied to the steel sheet while moving the preceding power supply roll 10 in the direction opposite to the running direction of the steel strip (in the direction of the arrow in the figure).
- the temperature of the steel strip reaches 1100 ° C
- the steel strip is run, and at the same time, the rear feed roll 11 is opened up and down (indicated by a broken line). Electric heating was performed.
- the steel strip was reduced in width from 50 bandages to 40 joints (reduction amount l Oirnn) by a universal mill, the thickness of the central part was increased to 4.5 mm, and the thickness of the flange was reduced to 3 by a finishing mill.
- the tip of the steel strip In the electric heating device shown in Fig. 7, which has been subjected to hidden reduction and rolled into an angle iron, the tip of the steel strip cannot be heated, so that the rolled angle iron has a poor shape and reduces the yield. But Figure 8
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
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Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019970700356A KR100227228B1 (ko) | 1994-07-19 | 1995-07-13 | 강편으로 산형강(山形鋼)을 제조하는 압연장치 및 그 압연장치를 이용한 산형강의 압연방법 |
DE69527143T DE69527143T2 (de) | 1994-07-19 | 1995-07-13 | Walzwerk zur herstellung von winkelstahl aus bandstahl |
EP95925122A EP0771595B1 (en) | 1994-07-19 | 1995-07-13 | Rolling apparatus for producing angle steel from steel strip |
US08/765,406 US5941114A (en) | 1994-07-19 | 1995-07-13 | Rolling apparatus for producing angle from steel strip and method of rolling the angle using the same |
AU29365/95A AU690717B2 (en) | 1994-07-19 | 1995-07-13 | Rolling mill for producing angle steel from hoop steel and method for rolling angle steel using the rolling mill |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16661494 | 1994-07-19 | ||
JP6/166614 | 1994-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996002333A1 true WO1996002333A1 (fr) | 1996-02-01 |
Family
ID=15834579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1995/001402 WO1996002333A1 (fr) | 1994-07-19 | 1995-07-13 | Laminoir pour la production de cornieres d'acier a partir de feuillards d'acier et procede de laminage de cornieres d'acier au moyen dudit laminoir |
Country Status (8)
Country | Link |
---|---|
US (1) | US5941114A (ja) |
EP (1) | EP0771595B1 (ja) |
KR (1) | KR100227228B1 (ja) |
CN (1) | CN1067302C (ja) |
AU (1) | AU690717B2 (ja) |
DE (1) | DE69527143T2 (ja) |
TW (1) | TW271411B (ja) |
WO (1) | WO1996002333A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US5890388A (en) * | 1997-07-30 | 1999-04-06 | Centre Bridge Investments | Method and apparatus for forming structural members |
RU2741875C1 (ru) * | 2020-07-19 | 2021-01-29 | Акционерное общество «ЕВРАЗ Нижнетагильский металлургический комбинат» (АО «ЕВРАЗ НТМК») | Способ прокатки угловых асимметричных профилей |
Families Citing this family (13)
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JP3242081B2 (ja) * | 1998-12-11 | 2001-12-25 | 鋼鈑工業株式会社 | ストラップ引締溶着工具 |
US6705145B1 (en) * | 1999-11-19 | 2004-03-16 | Matsushita Electric Industrial Co., Ltd. | Method of processing bent and deformed portion of metal material |
DE10132960A1 (de) * | 2001-07-06 | 2003-01-16 | Sms Demag Ag | Arbeitsverfahren zum Walzen von Walzprofilstäben aus Flachbändern |
DE102009057524A1 (de) | 2009-12-02 | 2011-06-09 | Sms Siemag Ag | Verfahren zum Warmwalzen eines Metallbandes oder -blechs und Warmwalzwerk |
CN101956058A (zh) * | 2010-06-13 | 2011-01-26 | 浙江佰耐钢带有限公司 | 一种钢带直接通电恒温装置 |
CN103447301A (zh) * | 2013-05-30 | 2013-12-18 | 王洪新 | 万能轧机立辊装置 |
CN103949890A (zh) * | 2014-01-27 | 2014-07-30 | 中国南方电网有限责任公司超高压输电公司 | Q420大角钢生产加工工艺 |
CN104148386A (zh) * | 2014-07-01 | 2014-11-19 | 东北大学 | 一种液压张力温轧机 |
DE102016200520B4 (de) * | 2015-03-19 | 2019-10-31 | Ford Global Technologies, Llc | Verfahren zur Herstellung eines Strukturbauteils sowie Walzeinrichtung |
CN107617640B (zh) * | 2015-12-09 | 2020-03-20 | 日照钢铁控股集团有限公司 | 一种高强度船用型钢热处理轧制工艺 |
CN109570231A (zh) * | 2018-10-16 | 2019-04-05 | 浙江鹏华新型材料有限公司 | 一种高韧性高强度的大规格角钢的生产工艺 |
CN109226353A (zh) * | 2018-10-30 | 2019-01-18 | 山西创奇实业有限公司 | 一种角钢成型机及其使用方法 |
CN111339613A (zh) * | 2020-02-25 | 2020-06-26 | 北京国网富达科技发展有限责任公司 | 一种圆弧顶角双肢厚型角钢及其设计方法 |
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1995
- 1995-07-13 AU AU29365/95A patent/AU690717B2/en not_active Ceased
- 1995-07-13 KR KR1019970700356A patent/KR100227228B1/ko not_active IP Right Cessation
- 1995-07-13 WO PCT/JP1995/001402 patent/WO1996002333A1/ja active IP Right Grant
- 1995-07-13 EP EP95925122A patent/EP0771595B1/en not_active Expired - Lifetime
- 1995-07-13 DE DE69527143T patent/DE69527143T2/de not_active Expired - Fee Related
- 1995-07-13 US US08/765,406 patent/US5941114A/en not_active Expired - Fee Related
- 1995-07-13 CN CN95194126A patent/CN1067302C/zh not_active Expired - Fee Related
- 1995-08-02 TW TW084108041A patent/TW271411B/zh active
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JPH0360802A (ja) * | 1989-07-31 | 1991-03-15 | Aichi Steel Works Ltd | アングル材の製造方法 |
JPH04356314A (ja) * | 1991-02-05 | 1992-12-10 | Sumitomo Metal Ind Ltd | 金属板の圧延装置 |
JPH05154503A (ja) * | 1991-11-30 | 1993-06-22 | Aichi Steel Works Ltd | ステンレス小形形鋼の製造方法 |
JPH0615301A (ja) * | 1992-06-30 | 1994-01-25 | Aichi Steel Works Ltd | 形鋼の成形方法 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5890388A (en) * | 1997-07-30 | 1999-04-06 | Centre Bridge Investments | Method and apparatus for forming structural members |
RU2741875C1 (ru) * | 2020-07-19 | 2021-01-29 | Акционерное общество «ЕВРАЗ Нижнетагильский металлургический комбинат» (АО «ЕВРАЗ НТМК») | Способ прокатки угловых асимметричных профилей |
Also Published As
Publication number | Publication date |
---|---|
US5941114A (en) | 1999-08-24 |
TW271411B (ja) | 1996-03-01 |
CN1153487A (zh) | 1997-07-02 |
KR970704527A (ko) | 1997-09-06 |
KR100227228B1 (ko) | 1999-11-01 |
EP0771595B1 (en) | 2002-06-19 |
CN1067302C (zh) | 2001-06-20 |
EP0771595A4 (en) | 1999-01-13 |
DE69527143D1 (de) | 2002-07-25 |
AU2936595A (en) | 1996-02-16 |
EP0771595A1 (en) | 1997-05-07 |
AU690717B2 (en) | 1998-04-30 |
DE69527143T2 (de) | 2003-02-06 |
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