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Unformatted text preview: the springback angle. In total, 33 samples have been used for this purpose. d- Bend allowances. The same press brake as for 3.1.c was used to impose a bend angle of 90° after unloading in another separate set of 36 samples. The lengths of the two bend legs have been measured using a digital calliper as described in 3.2.d near both ends of the bend line to calculate the actual bend allowance. e- Gauging. Two main factors causing gauging errors were investigated. For the machine factor, the experimental setup to analyse the repeatability of the positioning of the back gauges is shown in Figure 3.a. It consists of a dial gauge as described in 3.2.e Factors Influencing Dimensional Accuracy of Bent Parts 347 mounted on the die using a magnetic dial gauge stand. Such a setup is used for each of the two back gauges of a given press brake. The back gauges are instructed to move first backward and then forward to their original position, and the maximum deflections of the dial gauges are recor...
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This note was uploaded on 08/03/2010 for the course DD 1234 taught by Professor Zczxc during the Spring '10 term at Magnolia Bible.
- Spring '10
- The Land