Patent ID: 8534110

Claim:
A method for generating a bend in a tube by a rotary draw tube bender having a bend die, a clamp die, a pressure die and a wiper die, the method comprising: providing a test-piece having an outer surface defined by a length and a substantially round cross-section substantially identical to that of the tube; arranging the bend die, the clamp die, the pressure die and the wiper die relative to each other in the tube bender; arranging the test-piece in the tube bender relative to the bend die, the clamp die, the pressure die and the wiper die; applying a first force by the tube bender to clamp the test-piece; determining whether the first force applied to clamp the test-piece is within a predetermined range of forces; adjusting the arrangement of at least one of the bend die, the clamp die, the pressure die and the wiper die to apply a second force to clamp the test-piece that is within the predetermined range of forces; verifying that the second force applied to clamp the test-piece is within the predetermined range of forces; arranging the tube in the bender; and generating the bend.