A method is presented for hot forming sheets having arcuate shapes. The method includes providing a die having a first and second clamping section. The first clamping section has a first arcuate pressing surface and the second clamping section has a complementary second arcuate pressing surface. The clamping sections have a plurality of heaters disposed therein. The die is heated to a predetermined temperature. The clamping sections are spaced apart by a predetermined distance. A precursor sheet is positioned therebetween such that the precursor sheet is spaced apart from the first arcuate pressing surface by a spacing distance. The clamping sections are pressed into engagement with the precursor sheet to form a production sheet having a predetermined shape by engagement with the first pressing surface and the second pressing surface and a predetermined pressing force for a predetermined pressing time.

A method is presented for hot forming sheets having arcuate shapes. The method includes providing a die having a first and second clamping section. The first clamping section has a first arcuate pressing surface and the second clamping section has a complementary second arcuate pressing surface. The clamping sections have a plurality of heaters disposed therein. The die is heated to a predetermined temperature. The clamping sections are spaced apart by a predetermined distance. A precursor sheet is positioned therebetween such that the precursor sheet is spaced apart from the first arcuate pressing surface by a spacing distance. The clamping sections are pressed into engagement with the precursor sheet to form a production sheet having a predetermined shape by engagement with the first pressing surface and the second pressing surface and a predetermined pressing force for a predetermined pressing time.

Device for bending a thread-like material, for instance a tube, with different angles and orientations, in particular for exhaust pipes and manifolds for cars, provided with at least two pairs of clamping jaws hooked to a rotary device.

Device for bending a thread-like material, for instance a tube, with different angles and orientations, in particular for exhaust pipes and manifolds for cars, provided with at least two pairs of clamping jaws hooked to a rotary device.

A method of manufacturing a hollow stabilizer includes a forming step of subjecting an element pipe to a bending process, to form a product shape including bent portions, and a quenching step of quenching the element pipe subjected to the bending process. In the quenching step, a cooling process is performed by immersing the element pipe made of steel in coolant and by spraying the coolant to an outer surface of the bent portion.

An induction heating coil for stably heating a steel tube which is being fed in its axial direction without rotating, the heating being uniform in the circumferential direction and in a narrow range in the axial direction has at least two 1-turn coils in the form of a first turn coil body and a second turn coil body. The inner peripheral length Ln (the non-effective coil length) where the effective number of coil turns is less than the total number of coil turns when the coil is projected in the axial direction and the inner peripheral length L0 of the projected coil bodies (the inner coil length) satisfy Ln/L0<0.05. First and second coil bodies have insulating portions on their connecting portions, and the insulating portions are present in locations separated by a central angle of 5-45 measured from the center of the coil bodies.

Adapters and an all-in-one handle to couple with pipe bender heads of different sizes are disclosed. Different pipe bender heads may require differently sized handles that couple to the varying coupling bores of the pipe bender heads. Carrying and having multiple handles on the job site may be cumbersome. Instead of carrying multiple handles, the user may carry adapters that may be used to couple the different pipe bender heads to a single sized handle. The adapters may have a first mating section to couple with the coupling bores of various pipe bender heads and a second mating section to couple with the all-in-one handle.

Adapters and an all-in-one handle to couple with pipe bender heads of different sizes are disclosed. Different pipe bender heads may require differently sized handles that couple to the varying coupling bores of the pipe bender heads. Carrying and having multiple handles on the job site may be cumbersome. Instead of carrying multiple handles, the user may carry adapters that may be used to couple the different pipe bender heads to a single sized handle. The adapters may have a first mating section to couple with the coupling bores of various pipe bender heads and a second mating section to couple with the all-in-one handle.

A steel product bent by heating to 600 C. or more, specifically a heat treated steel product having high strength and excellent chemical conversion coating ability which has scale with FeO content of 90% or more, having a thickness of 1 m or less on the surface.

A steel product bent by heating to 600 C. or more, specifically a heat treated steel product having high strength and excellent chemical conversion coating ability which has scale with FeO content of 90% or more, having a thickness of 1 m or less on the surface.