Shaped pipe forming computer-aided design essay solutions

Shaped pipe forming computer-aided design Shaped pipe forming computer-aided design essay solutions

Original author: Rick Washburn North United States University of Albert Sedlmaier Source: OneTwoFree.Sp

[Abstract ]

Abstract: Shaped Steel is widely used in automotive, construction, etc. The roll forming process is the key technology of shaped tubes production. Using computer-aided design technology to achieve the optimization design of high-precision, complex contour roll. Shorten the design cycle of the roll, and reduce the manufacturing cost of debugging, shaped tubes forming the design is no longer rely mainly on the designer's experience and rely on trial and error debugging correction. The author gives the application COPRA Yixingguan design in the manufacture of successful examples.
Keywords: shaped pipe forming the Computer Aided Design Introduction shaped steel tubes are widely used in automotive, construction, etc.. Usually welded steel pipes or seamless steel pipe, tube mother tube roller continuous molding (rollforming) or mold drawing forming (drawing ring) produced. Roller continuous molding production rate in the welded pipe production line can be achieved without interruption of production and finished product rate, head loss, the more widely used in mass production. Continuous molding process Yixingguan roll roll design is a key technology in the production. Using computer-aided design technology that enables the optimization design of high-precision, complex contour roll. Shorten the design cycle, roller and reduce manufacturing debugging costs, so shaped tubes forming design is no longer mainly relies on the designer's experience and rely on trial and error debugging amendment. COPRA of Germany data M Corporation is a professional software Yixingguan forming roll. Yixingguan deformation of the basic principles of a. The projection of the linear topological relations eventually produce Pipes, regardless of its shape how complex contour can always be a straight line and arc entities. Tube into the molding process shaped tubes, shaped tubes of solid elements and the corresponding part of the tube to maintain a linear topology projection relation. The cross-section of the deformation process is composed of a wireframe model by tube and Yixingguan sections on point. Figure 1 is shaped tubes and tube solid elements to maintain the linear topology.

Projection of a linear topology relationship

The COPRA the final Yixingguan given cross-section by a straight line and arc entities, and it can be converted by AutoCAD polyline contours generated. Designer deformation of the allocation is given in accordance with the structural parameters of the mill, by the COPRA automatic calculation between the tube and the final section of the deformation roller spend a process map. These deformation roller flower craft section of the curve of the final section geometry, unlike the mother by a single radius pipes and straight-line arc entity the final Yixingguan of. Two. Neutral line the length of the tube is the length of the design of forming the entity to calculate the benchmark, it is equal to no compression of the final shaped cross-section corresponding to the length of the neutral line. The diameter of the tube is given by the section contour benchmark and the total compression factor calculation. Tube and the middle of the deformation process of physical division of the number and the length of each entity in the corresponding final shaped cross section. Period of a given length of 100mm, 100mm of straight line segments corresponding to the tube on a given part (0% compression). Depending on the section of the length of the entity and tube outer diameter of the tube on the angle of the arc entity.

Figure 2 forming entity length calculation

(3) the compression factor of the compression factor and the amount of compression molding, also known as elongation factor, shaped tubes in terms of tube deformation, the ratio of the perimeter of the main pipe and final Yixingguan perimeter. When the molding process of the shaped tubes, to ensure there is enough material to enrich and to consider the material in the longitudinal extension of the need to identify the appropriate compression factor in the pass. Usually the total compression factor of between 1% -2%, taking into account the round main pipe diameter. Close to the existing tube diameter, reducing the need for the design and manufacture of tube part of the roll. 4.The distribution of deformation of the uniform deformation, deformation process of the angle of the arc entity accurately equal to two adjacent rack deformation between the two angles corresponding to the entity. The last pass in the actual design, the distribution of deformation need to consider the following factors: A. change in the tube shaped tubes initial pass, easy to bite into the allocation of a smaller amount of deformation; B. in Yixingguan forming , in order to guarantee the accuracy of product size, allocated a smaller amount of deformation; C.-driven flat roller to distribute more deformation; less rigid D. Celi roll, passes, and the general non-power-driven allocation smaller amount of deformation; E. deformed by the adjacent pass the degree of difficulty as well as accommodating the shape of the outline of the roll, adjust the distribution of deformation; F. shaped tubes complexity and mill available times to determine the deformation .The COPRA can be assigned deformation at selected times between the percentage times the sum of 100 percent.

Figure 3 the distribution of deformation

5 Middle Road roller spend data is the key to the design optimization iteration . The COPRA used mathematical iterative method to calculate the pass entity data. The COPRA given three kinds of optimization methods. The designer needs to given to allow the closure gap and optimize the iteration time. The design results can also use the the COPRA deformation module, according to the wireframe model of stress and strain analysis, judgment and modify the design to make. Special Pipes design example of the COPRA Yixingguan design module to complete a variety of specifications, the design of a variety of cross-section shaped pipe, and successfully used in the production practice. Profiled roll Integrated CAD / CAM technology, the design basis, on an OEM basis, and unified installation debugging benchmark.Roll made from the CAD profile data via a special program for CNC machining, CNC instruction code, the computer communication interface directly into the CNC machine tools. In order to eliminate heat treatment distortion, finishing after heat treatment. Because of the design to consider the installation and commissioning of the benchmark, flat roll equal to the axial length of the vertical roll equal height, and makes adjustments simple and reliable, and high accuracy.

Figure 4 Yixingguan deformation examples

Figure 5 morphing technology module simulation

Figure 6 tube forming the instance of the shaped tubes

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