We propose the procedures whose realization in the form of algorithms and mathematical models developed on the basis of the finite-element method (FEM) enables one to compute the boundaries of the ...zone of deformation and the width and radius of the billets formed in the pressing equipment depending on the depth of lowering of the upper punch in each step for the edge-bending (EBP) and step forming (SFP) presses followed by the additional shaping of splined pipes, welding in an assembly welding mill, and calibration in the expander and to get finished profiles of the pipes with diameters of up to 1420 mm and with the required geometric dimensions without defects and according to the regulatory documents. The application of the developed “ZV JCO” software enables one to compute the effective parameters of adjustment of pressing tools, to reduce the time required to compile the technological maps by 4–6 times (down to 20 min), and hence, to optimize the processes of forming and welding of large-diameter pipes.
Data are presented on the hot pressing of pipe with helical internal ribbing at Volzhsk Pipe Plant (pipe pressing shop 2). A new design is proposed for the needle used in pressing. The transverse and ...longitudinal profiles of the pipe’s internal surface are assessed. Pipe samples are shown.
The analysis of the quality of large diameter welded pipes (LDP) was carried out and a method was proposed in the form of algorithms and mathematical models based on the finite-element method (FEM), ...which allows calculating the boundaries of the deformation zone, the width and radius of the billet to be formed at each step of the step forming press and obtaining profile of “spline” pipe, which, upon subsequent deformation and welding on the equipment of the TESA 1420 line, ensures the production of finished pipes of the required dimensions in accordance with regulatory documents and without defects.
Hard-alloy coating for cutting and pressing tools by electric impulse technology Novikov, Sergey V.; Peretyagin, Pavel Yu; Pristinskiy, Yurii O. ...
Mechanics & industry : an international journal on mechanical sciences and engineering applications,
2015, 2015-00-00, 20150101, Letnik:
16, Številka:
Supplement, 7
Journal Article
Recenzirano
Odprti dostop
The progressive electric impulse method of hard-alloy coating for cutting and pressing tools is developed. The results of research showed influences of the structure formation for hard-alloy coating ...of the powders by hybrid treatment of the electric impulse and mechanical pressure.
The procedure for determining the optimal angles of the process tool for pressing trimetal billet is given. Optimization is based on the pressing stress ensuring minimal power inputs for pressing.
Applications in Industry Brewin, P.; Coube, O.; Gethin, D. T. ...
Modelling of Powder Die Compaction
Book Chapter
This chapter gives examples of the successful use of compaction modelling (CM) by industry. The examples complement those for the parmaceutical industry in Chapter 14 and have been selected to ...illustrate the use of CM in solving common industry problems.
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