[Abstract] This paper introduces the UG software CAD technology: solid modeling, virtual assembly and engineering drawing methods, control UG software application prospects in the field of packaging machinery design.
Keywords: UG/CAD; Packaging Machinery
UG software is developed by U.S. Unigraphics Solutions (UGS) and is the world's most famous generic CAD/CAM/CAE system. UG entered China in the 1990s and has been widely used in aviation, automobiles, machinery and other fields, and has played an increasingly important role. The UG 3D modeling method breaks the limitations of the traditional 2D design, enabling designers to see the 3D stereoscopic image of the product on the computer during the design phase of the project, complete the virtual manufacturing of the product, and minimize design errors. Avoid the waste and loss in the process of designing and processing, reduce the cost, shorten the design cycle, improve the design quality, and enhance the market competitiveness of the product. UG has many successful application examples in the field of mechanical design, such as the development of new products for rocket engines, steel rolling equipment, lifting equipment, and excavating equipment. However, in the packaging machinery design, the application of UG is still in its infancy. This article describes the UG entity modeling, virtual assembly and engineering drawing methods, so that the majority of packaging engineering and technical personnel understand UG software, master UG / CAD technology, improve the packaging machinery design level, adapt to the rapid development of packaging machinery needs.
The UG solid modeling module (Modeling...) provides the right modeling tool to meet a variety of design needs:
(1) Solids, surfaces, features, freeform surfaces, wireframes, parametric modeling, etc.;
(2) Support and establish various standard design features for editing holes, slots, cavities, cylinders, bodies, blocks, spheres, tubes, rods, rounding and chamfering;
(3) The entity can be hollowed into thin-walled parts;
(4) It is possible to draw a sketch first, generate a parametric solid model according to specific requirements, and directly perform solid modeling based on the characteristics of the product.
Solid modeling is the foundation of UG design technology. The physical model is also called the master model. The UG virtual assembly, engineering drawing, mechanism motion analysis, finite element analysis, and the preparation of machining programs must all be directly applied to the established master model. For example, in the motion analysis module of the UG mechanism, the master model is directly used to perform complex motion analysis and design simulation of two-dimensional or three-dimensional mechanical systems, and a large number of assembly analysis tasks can be completed, such as minimum distance, interference check, reaction force, graphic synthesis displacement, Speed ​​and acceleration, drawing motion trajectory envelope, etc.
2 Virtual Assembly In many CAD/CAM, there are two distinct types of assembly architectures: multi-part methods and virtual assembly methods. The multi-part assembly method must copy all the part data into the assembly file, and the resulting assembly is not intelligent and must use a lot of memory to store all the parts that make up the assembly. UG assembly modules (Assembies) use pointer linking parts instead of copying parts to achieve false assembly, with the following characteristics:
(1) Reduced memory requirements for assembly (2) Since the basic geometry does not need to be edited, the assembly display is simplified;
(3) If the components that make up the assembly are changed, the assembly is automatically updated;
(4) Each component participating in the virtual assembly is flexible or matched, and maintains its relevance;
(5) The positional relationship between parts in an assembly can be defined;
(6) Two-dimensional drawing, processing, etc. can use master data, but cannot change master data;
(7) UG assembly modeling method is a parallel, top-down or bottom-up modeling method.
The use of UG virtual assembly technology for assembly modeling, can promptly check the assembly model for the existence of the design size interference, to provide a reliable guarantee for the smooth implementation of the actual assembly in the future. The resulting assembly information can be used to easily draw assembly drawings and quickly generate assembly exploded views, saving the time and cost of drawing assembly drawings and parts drawings.
3 Drafting for Engineering Drawings UG has the following functions:
(1) The pattern is completely associated with the design model;
(2) It can create an entity sectional view completely associated with the model;
(3) Automatically generate hidden line display features in solid models;
(4) Most of the drawing objects can be created and edited using the same dialog box.
Utilizing the UG engineering drawing module, the two-dimensional engineering drawing that is consistent with the solid model can be easily obtained.
When the physical model changes, the drawing size will be automatically updated synchronously, reducing the time required for the model to change the two-dimensional map update, and it can fundamentally eliminate the dimensional inconsistency, lost line, and other errors in the traditional two-dimensional drawing design. The correctness of 2D engineering drawings.
4 UG software application prospects in the field of packaging machinery design China's packaging machinery industry has developed rapidly since the 1990s and has now become an important part of the machinery industry.
(1) There are many types of packaging machinery, and replacements are fast. Such as can be classified as packaging products processing machinery, packaging container processing machinery, direct packaging machinery, packaging and decoration printing machinery and other, each major category can be divided into several sub-categories. With the continuous innovation of packaging materials (such as paper packaging, plastic packaging, glass packaging, metal packaging) materials, structure and modeling, and the pursuit of packaging beauty, people have driven the rapid development of the packaging machinery industry. Therefore, the replacement of packaging machinery is far faster than other machinery industries.
(2) Among the packaging machinery products, high and new technologies such as electromechanical integration technology, microcomputer application technology, and heat pipe technology are widely used, and the corresponding design and manufacturing technologies (CAD/CAM/CAE) are relatively backward. At present, 2D CAD is widely used in the design of packaging machinery, and the application of 3D CAD is still in its infancy. Therefore, the application of three-dimensional CAD should be vigorously promoted to improve the design level and meet the needs of new product development for packaging machinery.
(3) There are many institutions in the packaging machinery and the movement is complicated. For example, a four-bar mechanism, a cam mechanism, a gear mechanism, or a combination thereof may exist simultaneously in a packaging machine. Using UG software for assembly modeling, the coherent size of the design can be found in time. In addition, the use of UG software can also carry out mechanism motion simulation, finite element analysis and optimization, check whether collision collision occurs during the movement of the mechanism, to provide a theoretical basis for determining a reasonable design.
The UG is applied to the design of packaging machinery. It gives a brand-new design method. It not only breaks through the limitations of traditional 2D design, but also better embodies, validates, enriches, and improves the designer's design intent. As early as the time when the product bids, the appearance, shape, technical performance and features of the future products will be introduced to the users so that the products will be more competitive. Given the many characteristics of packaging machinery and the superiority of UG's three-dimensional design technology, it is expected that UG software will have broad application prospects in this field. (Lin Yiping, Hao Xihai) (Zhuzhou Institute of Technology, Zhuzhou 412008, Hunan, China)
Keywords: UG/CAD; Packaging Machinery
UG software is developed by U.S. Unigraphics Solutions (UGS) and is the world's most famous generic CAD/CAM/CAE system. UG entered China in the 1990s and has been widely used in aviation, automobiles, machinery and other fields, and has played an increasingly important role. The UG 3D modeling method breaks the limitations of the traditional 2D design, enabling designers to see the 3D stereoscopic image of the product on the computer during the design phase of the project, complete the virtual manufacturing of the product, and minimize design errors. Avoid the waste and loss in the process of designing and processing, reduce the cost, shorten the design cycle, improve the design quality, and enhance the market competitiveness of the product. UG has many successful application examples in the field of mechanical design, such as the development of new products for rocket engines, steel rolling equipment, lifting equipment, and excavating equipment. However, in the packaging machinery design, the application of UG is still in its infancy. This article describes the UG entity modeling, virtual assembly and engineering drawing methods, so that the majority of packaging engineering and technical personnel understand UG software, master UG / CAD technology, improve the packaging machinery design level, adapt to the rapid development of packaging machinery needs.
The UG solid modeling module (Modeling...) provides the right modeling tool to meet a variety of design needs:
(1) Solids, surfaces, features, freeform surfaces, wireframes, parametric modeling, etc.;
(2) Support and establish various standard design features for editing holes, slots, cavities, cylinders, bodies, blocks, spheres, tubes, rods, rounding and chamfering;
(3) The entity can be hollowed into thin-walled parts;
(4) It is possible to draw a sketch first, generate a parametric solid model according to specific requirements, and directly perform solid modeling based on the characteristics of the product.
Solid modeling is the foundation of UG design technology. The physical model is also called the master model. The UG virtual assembly, engineering drawing, mechanism motion analysis, finite element analysis, and the preparation of machining programs must all be directly applied to the established master model. For example, in the motion analysis module of the UG mechanism, the master model is directly used to perform complex motion analysis and design simulation of two-dimensional or three-dimensional mechanical systems, and a large number of assembly analysis tasks can be completed, such as minimum distance, interference check, reaction force, graphic synthesis displacement, Speed ​​and acceleration, drawing motion trajectory envelope, etc.
2 Virtual Assembly In many CAD/CAM, there are two distinct types of assembly architectures: multi-part methods and virtual assembly methods. The multi-part assembly method must copy all the part data into the assembly file, and the resulting assembly is not intelligent and must use a lot of memory to store all the parts that make up the assembly. UG assembly modules (Assembies) use pointer linking parts instead of copying parts to achieve false assembly, with the following characteristics:
(1) Reduced memory requirements for assembly (2) Since the basic geometry does not need to be edited, the assembly display is simplified;
(3) If the components that make up the assembly are changed, the assembly is automatically updated;
(4) Each component participating in the virtual assembly is flexible or matched, and maintains its relevance;
(5) The positional relationship between parts in an assembly can be defined;
(6) Two-dimensional drawing, processing, etc. can use master data, but cannot change master data;
(7) UG assembly modeling method is a parallel, top-down or bottom-up modeling method.
The use of UG virtual assembly technology for assembly modeling, can promptly check the assembly model for the existence of the design size interference, to provide a reliable guarantee for the smooth implementation of the actual assembly in the future. The resulting assembly information can be used to easily draw assembly drawings and quickly generate assembly exploded views, saving the time and cost of drawing assembly drawings and parts drawings.
3 Drafting for Engineering Drawings UG has the following functions:
(1) The pattern is completely associated with the design model;
(2) It can create an entity sectional view completely associated with the model;
(3) Automatically generate hidden line display features in solid models;
(4) Most of the drawing objects can be created and edited using the same dialog box.
Utilizing the UG engineering drawing module, the two-dimensional engineering drawing that is consistent with the solid model can be easily obtained.
When the physical model changes, the drawing size will be automatically updated synchronously, reducing the time required for the model to change the two-dimensional map update, and it can fundamentally eliminate the dimensional inconsistency, lost line, and other errors in the traditional two-dimensional drawing design. The correctness of 2D engineering drawings.
4 UG software application prospects in the field of packaging machinery design China's packaging machinery industry has developed rapidly since the 1990s and has now become an important part of the machinery industry.
(1) There are many types of packaging machinery, and replacements are fast. Such as can be classified as packaging products processing machinery, packaging container processing machinery, direct packaging machinery, packaging and decoration printing machinery and other, each major category can be divided into several sub-categories. With the continuous innovation of packaging materials (such as paper packaging, plastic packaging, glass packaging, metal packaging) materials, structure and modeling, and the pursuit of packaging beauty, people have driven the rapid development of the packaging machinery industry. Therefore, the replacement of packaging machinery is far faster than other machinery industries.
(2) Among the packaging machinery products, high and new technologies such as electromechanical integration technology, microcomputer application technology, and heat pipe technology are widely used, and the corresponding design and manufacturing technologies (CAD/CAM/CAE) are relatively backward. At present, 2D CAD is widely used in the design of packaging machinery, and the application of 3D CAD is still in its infancy. Therefore, the application of three-dimensional CAD should be vigorously promoted to improve the design level and meet the needs of new product development for packaging machinery.
(3) There are many institutions in the packaging machinery and the movement is complicated. For example, a four-bar mechanism, a cam mechanism, a gear mechanism, or a combination thereof may exist simultaneously in a packaging machine. Using UG software for assembly modeling, the coherent size of the design can be found in time. In addition, the use of UG software can also carry out mechanism motion simulation, finite element analysis and optimization, check whether collision collision occurs during the movement of the mechanism, to provide a theoretical basis for determining a reasonable design.
The UG is applied to the design of packaging machinery. It gives a brand-new design method. It not only breaks through the limitations of traditional 2D design, but also better embodies, validates, enriches, and improves the designer's design intent. As early as the time when the product bids, the appearance, shape, technical performance and features of the future products will be introduced to the users so that the products will be more competitive. Given the many characteristics of packaging machinery and the superiority of UG's three-dimensional design technology, it is expected that UG software will have broad application prospects in this field. (Lin Yiping, Hao Xihai) (Zhuzhou Institute of Technology, Zhuzhou 412008, Hunan, China)
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