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STEEL PLATES AND SECTIONS Group A Vishwas tomar Mohd. Arif khan Nihar herwadkar Krishnanandh S.

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Presentation on theme: "STEEL PLATES AND SECTIONS Group A Vishwas tomar Mohd. Arif khan Nihar herwadkar Krishnanandh S."— Presentation transcript:

1 STEEL PLATES AND SECTIONS Group A Vishwas tomar Mohd. Arif khan Nihar herwadkar Krishnanandh S.

2 Standard steel sections and processes involved in their manufacture

3 Commercially available standard steel sections (A) (A) FLAT PLATE (B) (B) OFFSET BULB PLATE

4 Commercially available standard steel sections (C) (C) EQUAL ANGLE (D) (D) UNEQUAL ANGLE

5 Commercially available standard steel sections (E) (E)CHANNEL (F) (F)TEE

6 Processes involved to make these sections PROCESSES INVOLVED CuttingPressingRolling MachiningDrilling

7 Processes involved to make these sections Machining: Machining: overhead electric cranes with 5 to 15 tonnes capacity transport plates and sections to each machine process. overhead electric cranes with 5 to 15 tonnes capacity transport plates and sections to each machine process. cutting flat plates to the required profiles is automated with very sophisticated machines being used for the purpose. cutting flat plates to the required profiles is automated with very sophisticated machines being used for the purpose. cutting is achieved by the use of oxy-fuel flame or plasma-arcs. cutting is achieved by the use of oxy-fuel flame or plasma-arcs. a profiling machine is used to cut a plate into one or more, or a series of complicated shapes. a profiling machine is used to cut a plate into one or more, or a series of complicated shapes.

8 Processes involved to make these sections Drilling: to drill holes in steel plates or sections. to drill holes in steel plates or sections. generally consist of a single drilling head mounted on a radial arm. generally consist of a single drilling head mounted on a radial arm. used for making bolted covers and portable sections, etc. used for making bolted covers and portable sections, etc.

9 Processes involved to make these sections Cutting: smaller plates such as beam knees and various brackets are cut in a hydraulically operated guillotine. smaller plates such as beam knees and various brackets are cut in a hydraulically operated guillotine. the plates feeded into the guillotine are supported by roller castors and positioning of the cut edge is by the hand. the plates feeded into the guillotine are supported by roller castors and positioning of the cut edge is by the hand.

10 Processes involved to make these sections Pressing: hydraulic presses are extensively used in the shipyards for bending, straightening, flanging, dishing, and swaging plates. hydraulic presses are extensively used in the shipyards for bending, straightening, flanging, dishing, and swaging plates. this is done with the plate cold. this is done with the plate cold. the press is slower when used for bending and requires greater skill as compared to rolling. the press is slower when used for bending and requires greater skill as compared to rolling.

11 Processes involved to make these sections Rolling: hydraulically operated heavy duty bending rolls are used for rolling shell plates etc. to the correct curvature. hydraulically operated heavy duty bending rolls are used for rolling shell plates etc. to the correct curvature. it consists of two lower rolls, revolving in the same direction with the plate being fed between them. a larger diameter top roll runs idly. Either or both ends of the top rolls can be adjusted for height and the two lower rolls have adjustable centres.

12 Processes involved to make these sections Rolling continued… Rolling continued… Modern bending rolls can handle plated upto 45mm thick and its possible to roll them to half a circle. Modern bending rolls can handle plated upto 45mm thick and its possible to roll them to half a circle. These large rolls can also be supplied with accessories allowing them to undertake heavy flanging work with the pressure being exerted by the upper beam, e.g. troughing corrugated bulkhead sections These large rolls can also be supplied with accessories allowing them to undertake heavy flanging work with the pressure being exerted by the upper beam, e.g. troughing corrugated bulkhead sections


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