摘要:
This coiler device (1) provided with wrapper aprons (22) has: a mandrel (20) that coils up a metal sheet ( 2); a plurality of wrapper rollers (21) that coil the metal sheet (2) to the mandrel (20); and a plurality of wrapper aprons (22) that guide the leading end of the metal sheet (2) between adjacent wrapper rollers (21). A configuration is adopted having a fluid supply device (70) that supplies a fluid to the guide surfaces (22a) of the wrapper apron (22A) disposed at the most upstream side with respect to the coiling of the metal sheet (2).
摘要:
In mash seam welding for performing to weld metal plates with thicknesses of 2 mm or more, it is possible to stabilize the strength of a joint portion, reduce uneven parts of the joint portion, ensure high strength and reliability of the joint portion, and join metal plates with thicknesses of 4.5 mm or more. Two metal plates (5, 6) are clamped with first and second clamping devices (7, 8), and the two metal plates (5, 6) are placed to overlap each other at their end portions, and then overlapping portions (L) of the two metal plates 5, 6) are pressed with a pair of upper and lower electrode wheels (1, 2) while welding currents flow to continuously weld the overlapping portions (L) and join the two metal plates. The pessing forces applied to the upper and lower electrode wheels (1, 2) are controlled so that upper and lower welding forces acting upon the overlapping portions are equal to each other during the time when the overlapping portions are continuously welded while the welding currents flow.
摘要:
In the rolling mill, an orifice (20) (contracted flow part) and a chamber (21) (expanded part) are provided in a hydraulic line (19) for a hydraulic cylinder (17) (hydraulic pressing means). The orifice (20) is disposed more to the hydraulic cylinder (17) side than the chamber (21). The internal diameter of the orifice (20) is set to be 2.5 mm (Õ) or greater and 15 - 85% of the internal diameter of the hydraulic line (19). Thus, it is possible to control milling vibration.
摘要:
This coiler device (1) provided with a chute guide (40a) has: pinch rollers (10a, 10b) that lead a metal sheet (2) carried in along a path line (L1) to a coil-up line (L2) that is curved from the path line (L1); a mandrel (20) that is disposed ahead of the coil-up line (L2) and coils up the metal sheet (2); and a chute guide (40a) that guides the upward-facing surface side of the metal sheet (2) at the coil-up line (L2) and introduces the metal sheet (2) to the coil-up opening (23) of the mandrel (20). A configuration is adopted such that the chute guide (40a) has: a main body frame (70) ; and a liner (72) that is attached to the main body frame (70), forms at least a portion of the guide surface (42) that guides the metal sheet (2), has a lower coefficient of friction than the main body frame (70), and has a lower hardness than the metal sheet (2).
摘要:
Adopted is a coiler device (1) that is provided with a chute roller (50) and has: pinch rollers (10a, 10b) that lead a metal sheet carried in along a path line (L1) to a coil-up line (L2) that is curved from the path line (L1) ; a mandrel (20) that coils the metal sheet and is disposed ahead of the coil-up line (L2); and a chute roller (50) that exposes at least the leading end of the metal sheet to the coil-up line (L2) when being wound to the mandrel (20), and suppresses deformation of the metal sheet such that same bends to the upward facing surface side.
摘要:
When metal plates each having a thickness smaller than a diameter of each of shoulders of rotary tools are joined by both-side friction stir welding, rupture and defective joining of the metal plates are suppressed, joining strength is enhanced, and reliability of the joining strength is improved, while the tool life is prolonged and the rotary tool economy is improved. Inlet and outlet side gripping devices 7, 8 grip front and back surfaces of metal plates 1, 2, respectively, and rotary tools 5, 6 disposed in opposed relationship in the front surface side and the back surface side of the welding portion J are moved in a direction in which the upper and lower rotary tools approach to each other and impart a predetermined clearance ´ between distal ends of probes 13a, 13b of the upper and lower rotary tools 5, 6 while pressing the shoulders 5b, 6b thereof against the front and back surface sides of the welding portion J. Under this state, the upper and lower rotary tools 5, 6 are moved along the butting portion J while rotating the upper and lower rotary tools thereby to perform the friction stir welding. At this time, the axes 14 of the upper and lower rotary tools 5, 6 are inclined in a direction in which the respective probes 13a, 13b move ahead of the other portions of the rotary tools with respect to a traveling direction of the rotary tools 5, 6.
摘要:
Provided are a molten metal plating facility and a method with which degradation in the surface quality of a strip can be prevented by preventing the adhesion of splashes. In a molten metal plating facility and a method for plating a strip (S) with molten metal by guiding the strip (S) into a molten metal bath (Mm) and then guiding the strip (S) upward, a pair of wiping nozzles (12a, 12b) disposed so as to face a front surface side and a back surface side of the strip (S) guided upward is used to discharge air streams (Ea, Eb) toward a collision point (A) inside the strip (S) such that the first air streams spread out in a strip width direction of the strip (S), and a pair of outer nozzles (15a, 15b) disposed so as to face a front surface side and a back surface side of an extended plane on an outer side of the strip (S) with respect to the strip width direction, above the wiping nozzles (12a, 12b) and on each of both outer sides of the strip (S) with respect to the strip width direction is used to discharge air streams (Fa, Fb) toward a collision point (B) within the extended plane and below the collision point (A).
摘要:
A steel-strip production apparatus 1 includes a continuous annealing furnace 2, a snout 6 connected to the continuous annealing furnace 2, a contact-type seal plate device 10 and a noncontact-type seal roll device 20 that are arranged on the entry side of the snout 6 along the transfer direction of a steel strip S in this order, a hot-dip-plating tank 5 that is movable, and an in-tank immersion sink roll 31 configured to turn the path direction of the steel strip S after passing through the snout 6. The steel-strip production apparatus includes a hot-dip-plated steel strip production unit configured to produce a hot-dip-plated steel strip by bringing the steel strip S continuously annealed in the continuous annealing furnace 2 into the hot-dip-plating tank 5, and a cold-rolled steel strip production unit configured to produce a cold-rolled steel strip by transferring the steel strip continuously annealed in the continuous annealing furnace 2 without causing the steel strip to pass through the hot-dip-plating tank 5, configured to be switchable with one another.
摘要:
This gate device (30) is provided with a guide unit (70) having a guide section (70) that is disposed at the downstream side of pinch rollers (10a, 10b) at a path line (L1) along which a metal sheet (2) is conveyed, opens/closes a coil-up line (L2) that is curved from the path line (L1), and guides the upwards-facing surface side of the metal sheet (2) led in to the coil-up line (L2) . A configuration is adopted such that the guide unit (70) has a main body frame (71) and a liner (72) that is attached to the main body frame (71), forms at least a portion of the second guide surface (32) that guides the metal sheet (2), has a lower coefficient of friction than the main body frame (71), and has a lower hardness than that of the metal sheet (2).
摘要:
The present invention is provided with: a duct of which one end interconnects to a wiping nozzle (22, 23) and the other end is open; a first valve (17) that controls the actual gas pressure (P1') of the wiping nozzle (22, 23); a second valve (18) that controls the gas flow rate (Q2) dissipating to outside the system from another branched duct; a wiping pressure setting unit (11) that sets the set gas pressure (P1) of the wiping nozzle (22, 23) ; a first valve aperture setter (13) that sets the valve aperture of the first valve (17) ; a second valve aperture setter (14) that sets the valve aperture of the second valve (18); and a computation processing unit (12) that presents to the first valve aperture setter (13) the valve aperture at which the gas pressure (P1') matches a set gas pressure (PI), and presents to the second valve aperture setter (14) the valve aperture at which the total gas flow rate (QT) supplied from a gas supply device (15) becomes uniform.