QUEZON CITY POLYTECHNIC UNIVERSITY
BATASAN CAMPUS
IBP ROAD, BATASAN HILLS, QUEZON CITY
DEPARTMENT OF INDUSTRIAL ENGINEERIN...
QUEZON CITY POLYTECHNIC UNIVERSITY
BATASAN CAMPUS
IBP ROAD, BATASAN HILLS, QUEZON CITY
DEPARTMENT OF INDUSTRIAL ENGINEERIN...
QUEZON CITY POLYTECHNIC UNIVERSITY
BATASAN CAMPUS
IBP ROAD, BATASAN HILLS, QUEZON CITY
DEPARTMENT OF INDUSTRIAL ENGINEERIN...
QUEZON CITY POLYTECHNIC UNIVERSITY
BATASAN CAMPUS
IBP ROAD, BATASAN HILLS, QUEZON CITY
DEPARTMENT OF INDUSTRIAL ENGINEERIN...
QUEZON CITY POLYTECHNIC UNIVERSITY
BATASAN CAMPUS
IBP ROAD, BATASAN HILLS, QUEZON CITY
DEPARTMENT OF INDUSTRIAL ENGINEERIN...
QUEZON CITY POLYTECHNIC UNIVERSITY
BATASAN CAMPUS
IBP ROAD, BATASAN HILLS, QUEZON CITY
DEPARTMENT OF INDUSTRIAL ENGINEERING
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  1. 1. QUEZON CITY POLYTECHNIC UNIVERSITY BATASAN CAMPUS IBP ROAD, BATASAN HILLS, QUEZON CITY DEPARTMENT OF INDUSTRIAL ENGINEERING Three-Roll Forming Submitted By: Astorga, Romy A. Submitted to: Prof. De Jesus, Norberto
  2. 2. QUEZON CITY POLYTECHNIC UNIVERSITY BATASAN CAMPUS IBP ROAD, BATASAN HILLS, QUEZON CITY DEPARTMENT OF INDUSTRIAL ENGINEERING Roll forming Roll forming is a continuous bending operation in which a long strip of metal (typically coiled steel) is passed through consecutive sets of rolls, or stands, each performing only an incremental part of the bend, until the desired cross-section profile is obtained. Roll forming is ideal for producing parts with long lengths or in large quantities. There are mainly 3 main processes, 4 rollers, 3 rollers and 2 rollers, and have different advantages according to the specifications of the plate (thickness length and diameter) and the shapes. Three-Roll Forming THREE-ROLL FORMING is a process for forming plate, sheet, bars, beams, angles, or pipe into various shapes by passing the work metal between three properly spaced rolls.
  3. 3. QUEZON CITY POLYTECHNIC UNIVERSITY BATASAN CAMPUS IBP ROAD, BATASAN HILLS, QUEZON CITY DEPARTMENT OF INDUSTRIAL ENGINEERING Three-roll forming machines, can also pre-bend both ends of a plate with a single insertion into the machine, for reduction in material- handling time and cost. These machines can act as single-pinch machines or as pyramid machines, allowing the fabricator to select the best procedure for a particular job. The wide opening between the rolls allows short, heavy plate to be rolled and, with accessory tooling, rolling of structural sections and bar stock on edge. Pinch- pyramid machines drive all 2 rolls-the top roll is fixed and one lower roll moves in a straight path or an arc toward the top roll. Cone rolling is done by tilting the lower rolls BASIC SHAPES: All forms, regardless of complexity, have, as their basis, one or a combination of basic shapes. Although an object may not perfectly duplicate a basic shape, the shapes are present. Objects are three dimensional in structure. The three dimensions are height, width, and depth. The four basic shapes are the cube, the sphere, the cylinder, and the cone. Describing objects by using basic forms simplifies the process of drawing and laying out forms on a page. Draw basic shapes as if they were made of glass to
  4. 4. QUEZON CITY POLYTECHNIC UNIVERSITY BATASAN CAMPUS IBP ROAD, BATASAN HILLS, QUEZON CITY DEPARTMENT OF INDUSTRIAL ENGINEERING see both the inside and outside of the objects. This technique is called drawing through an object and enables you to give objects depth as well as height and width. Advantages
  5. 5. QUEZON CITY POLYTECHNIC UNIVERSITY BATASAN CAMPUS IBP ROAD, BATASAN HILLS, QUEZON CITY DEPARTMENT OF INDUSTRIAL ENGINEERING Increased production and less downtime End flare, twist, camber and bow defects are easier to control Part lengths are not limited by mill specs (i.e. horizontal centers); if floor space is an issue, the parts can be run directly to the outside of the building Combination roll tooling that forms multiple strip widths does not require shear die changeover Parts with severe notches or complex cross-sections may not cut well after roll forming Disadvantages Strips must self-thread without damage to the lead edges, normally requiring additional forming stations Material can jam or double up in production and cause damage to the roll former and tooling If floor space is a concern, longer parts require a material conveyor between the pre- notch press and the roll former, equal to or greater than the longest part Conclusion From the research that have been done, it can be concluded that the roll forming method is better than the conventional Cast-In-Situ method in terms of the labor productivity. It can be seen in the number of work hours to install structural componentsby using roll forming is less compared to the Cast-In-Situ method. Typical applications
  6. 6. QUEZON CITY POLYTECHNIC UNIVERSITY BATASAN CAMPUS IBP ROAD, BATASAN HILLS, QUEZON CITY DEPARTMENT OF INDUSTRIAL ENGINEERING

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