Induction Pipe Bending
Induction pipe bending is a relatively new technology that originated in Eastern Europe in the 1960’s, and all the way through until the 1970’s the machines were only used for bending large diameter pipes, upwards of 60” (1524mm) outside diameter in some cases. It wasn’t until the mid-late 1970’s that the first commercial induction pipe bending machines were manufactured to cover smaller diameter pipes of around 6”-28”, these were produced in either the USA, UK or Japan.
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Pipe Bending / Tube Bending
It’s worth a mention firstly that there are two common terms used in industry, tube bending and pipe bending. Tube is measured by the outside diameter whereas pipe is measured by the inside diameter. Pipe sizing refers to the nominal inside diameter, sometimes called nominal bore, rather than the actual inside diameter.
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The Recent History of Design and Selection of Plate Bending Machines – Part 3
In the period since the early 1970's we have seen further developments. All 3 rolls on larger plate bending machines were now very often driven by independent hydraulic motors.
This eliminated the need for a clutch and became a more suitable design for heavier machines.
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The Recent History of Design and Selection of Plate Bending Machines – Part 2
The original power rolls were generally of the Pyramid Type. The old plate bending operators did however come up with ways to deal with this problem and some of them are described in the ‘The Recent History of Design and Selection of Plate Bending Machines’ (Part 1).
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The Recent History of Design and Selection of Plate Bending Machines – Part 1
The curving of wrought iron plate by passing a plate through a set of rollers probably dates back to the late 18th Century when Henry Cort, an English iron master rolled barrel hoops in the 1780's. The early machines would be small and could be directly hand driven or by a geared handle to give some mechanical advantage.
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