Abstract
Working on the design of the products obtained by the V-bending, the engineer uses the nominal thickness of the material. In this case, the problem is to evaluate the accuracy of the linear dimensions of the resulting products due to deviations in the thickness of the material and the manufacturing technology of the steel sheets. Article presents analysis of linear dimension accuracy for V-bending for the metal cold-rolled and hot-rolled sheets with thickness 1.0…8.0 mm and width from 1000…1500mm. Proposed method is based on the calculation of difference between nominal flat length and flat lengths corresponding maximum and minimum thickness of the metal sheet.
Highlights
V-bending of sheet metal is a widely used for metal forming in the manufacture of conveyors, elevators and other lifting and transport machines, because providing production time saving and minimizing the non-added-value activities [1, 2]
The maximum thickness deviations for cold-rolled steel sheet with a width of 1000 ... 1500 mm of normal accuracy and hot-rolled steel sheet with a width of 1000...1500 mm of normal accuracy are given in Table 1 [10, 11]
For products made of cold-rolled steel sheets with a thickness of 1.0 to 5.0 mm, the accuracy of linear dimensions are symmetrical in the range of ±0.18...±0.38 mm
Summary
V-bending of sheet metal is a widely used for metal forming in the manufacture of conveyors, elevators and other lifting and transport machines, because providing production time saving and minimizing the non-added-value activities [1, 2]. The approximate values of the allowable deviations of the dimensions of the parts after bending are specified in [9], while for material thicknesses of 3.0...6.0 mm, the allowable errors are 1.5...3.0 mm. It is not clear how these values were obtained and what they take into account. Https://doi.org/10.10 51/matecconf /202134601007 package: use the nominal thickness ssnn of the material or the measured actual value of the thickness ssff of the work piece material during the bending process. The article presents the results of research aimed at studying the problem of estimating the accuracy of linear dimensions for V-bending process
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