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Old 07-12-2009, 11:23 PM   #1
DoSang
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CATIA File Conversion?
CATIA V5 and V6 can directly use the CATIA V4 models, but changes in the CATIA data structure requires data conversion from CATIA V4 to V5/V6. This is due to both a change in geometric kernel between CATIA V4 and CATIA V5, and changes in the CAD data structure between CATIA V5 and CATIA V6 - wikipedia.org
Em làm cái lênh này cũng bị lỗi giống bạn Jupiter
Các bạc giúp em với! co phải bản cài Solidwork bị lôi hay không???

SolidWorks - History & Market
SolidWorks was introduced in 1995 as a competitor to CAD programs such as Pro/ENGINEER, I-DEAS, Unigraphics, and CATIA. SolidWorks Corporation was founded in 1993 by Jon Hirschtick, who recruited a team of engineers to build a company that developed 3D CAD software, with its headquarters at Concord, Massachusetts, and released its first product, SolidWorks 95, in 1995. In 1997 Dassault Systèmes, best known for its CATIA CAD software, acquired the company and currently owns 100% of its shares. SolidWorks was headed by John McEleney from 2001 to July 2007, and is now headed by Jeff Ray. Solidworks Corp. has sold over a million licenses of Solidworks worldwide. The Sheffield Telegraph comments that Solidworks is the world's most popular CAD software. Its user base ranges from individuals to large companies, and covers a very wide cross-section of manufacturing market segments. Commercial sales are made through an indirect channel, which includes dealers and partners throughout the world. Directly competitive products to SolidWorks include Pro/ENGINEER, Solid Edge, and Autodesk Inventor.
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Old 15-03-2009, 11:13 PM   #2
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Có cách khác, bạn thử xem sao:
Từ mặt Top, dựng Sketch1:

Dựng một đường construction

offset ra hai bên

Cắt bỏ phần ở giữa

chuyển hai đường dóng sang construction

Close sketch1, tạo một mặt plane cách mặt cách mặt top...


Dựng Sketch2

Convert hai đường dóng từ sketch1 lên sketch2

Chuyển hai đường này sang Construction rồi cắt đi phần ở giữa( như ở Sketch1)

Dùng lệnh LoftBend trên thanh công cụ Sheetmetal, click vào 2 sketch1 và sketch2

Để chiều dày vật liệu hướng vào trong

Trên cây thư mục, thay đổi thông số của Sheet-Metal1


So sánh kích thước của cạnh dưới( mép ngoài) trên part đã loft và trên Flat-Pattern, thấy gần bằng nhau.


Thông thường độ dài mép tôn sau khi lốc thành ống côn sẽ tăng lên, nên ta tăng giảm giá trị Kfactor đi để được kích thước tấm khai triển hợp lý.
Overview of Pro Engineer:
Pro/ENGINEER, PTC's parametric, integrated 3D CAD/CAM/CAE solution, is used by discrete manufacturers for mechanical engineering, design and manufacturing. Created by Dr. Samuel P. Geisberg in the mid-1980s, Pro/ENGINEER was the industry's first successful rule-based constraint (sometimes called "parametric" or "variational") 3D CAD modeling system[3]. The parametric modeling approach uses parameters, dimensions, features, and relationships to capture intended product behavior and create a recipe which enables design automation and the optimization of design and product development processes. This powerful and rich design approach is used by companies whose product strategy is family-based or platform-driven, where a prescriptive design strategy is critical to the success of the design process by embedding engineering constraints and relationships to quickly optimize the design, or where the resulting geometry may be complex or based upon equations. Pro/ENGINEER provides a complete set of design, analysis and manufacturing capabilities on one, integral, scalable platform. These capabilities, include Solid Modeling, Surfacing, Rendering, Data Interoperability, Routed Systems Design, Simulation, Tolerance Analysis, and NC and Tooling Design.
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Old 30-03-2009, 08:51 PM   #3
jupiter
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Xin cho em hỏi trong solidwork có khai triển được hình nón ko ạ ......nón cụt thì làm bằng lệnh LoftBend ...nhưng em định khai triển hình nón thì ko đc mong mọi người giúp em với em xin cám ơn
Glossary of Engineering Terms (wiki quotes): Dassault Systeme CATIA?
CATIA (Computer Aided Three-dimensional Interactive Application) is a multi-platform CAD/CAM/CAE commercial software suite developed by the French company Dassault Systemes and marketed worldwide by IBM. Written in the C++ programming language, CATIA is the cornerstone of the Dassault Systemes product lifecycle management software suite.
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Old 31-03-2009, 07:31 AM   #4
DCL
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Trích:
Nguyên văn bởi jupiter View Post
Xin cho em hỏi trong solidwork có khai triển được hình nón ko ạ ......nón cụt thì làm bằng lệnh LoftBend ...nhưng em định khai triển hình nón thì ko đc mong mọi người giúp em với em xin cám ơn
Chà cái cậu Jupiter này!

Trên thực tế, cậu có thấy ai làm được nón như lý thuyết, tức là có chóp nhọn tại 1 điểm không? Chúng đều là nón cụt tùy mức độ mà thôi, đến tờ giấy "pơ-luya" cũng không thể tạo nón như lý thuyết được!
Glossary of Engineering Terms (wiki quotes): Pro Engineer by PTC?
Pro/ENGINEER is a parametric, integrated 3D CAD/CAM/CAE solution created by Parametric Technology Corporation (PTC). It was the first to market with parametric, feature-based, associative solid modeling software. The application runs on Microsoft Windows and Unix platforms, and provides solid modeling, assembly modelling and drafting, finite element analysis, and NC and tooling functionality for mechanical engineers.
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Old 16-10-2009, 02:11 PM   #5
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Default Ðề: Khai triển ống côn

lên mạng search Solid shape, cái này đủ dùng.
Glossary of Engineering Terms (wiki quotes): What is PLM?
Product lifecycle management (PLM) is the process of managing the entire lifecycle of a product from its conception, through design and manufacture, to service and disposal. PLM integrates people, data, processes and business systems and provides a product information backbone for companies and their extended enterprise.
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Old 19-12-2009, 07:21 PM   #6
bichnhung07
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Default Ðề: Khai triển ống côn

có ai có vẽ khai triển hok? giúp em với
Glossary of Engineering Terms (wiki quotes): Industrial Design?
Industrial design is a combination of applied art and applied science, whereby the aesthetics, ergonomics and usability of mass-produced products may be improved for marketability and production. The role of an industrial designer is to create and execute design solutions towards problems of form, usability, user ergonomics, engineering, marketing, brand development and sales.
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Old 20-12-2009, 10:44 AM   #7
DCL
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Default Ðề: Khai triển ống côn

@Jupiter, DoSang và Bichnhung07,

Ở trên, bạn VTS đã hướng dẫn quá mức cụ thể và dễ hiểu rồi, có điều gì làm các cậu không hiểu nhỉ?

Trên thực tế, không ai làm được chóp nón bằng SheetMetal với đỉnh nhọn chỉ còn là một điểm, vì tấm vật liệu bao giờ cũng phải có một chiều dày nào đó, nên ta không thể làm được chóp nhọn. Ta chỉ có thể làm được các vỏ nón cụt, nếu các cậu muốn nó khá nhọn thì chỉ cần cho bán kính phần đáy nhỏ có giá trị đủ bé là được, đúng không?

Nói chung, SW thường không thực hiện những lệnh tạo hình phi thực tế!
Glossary of Engineering Terms (wiki quotes): Definition of Manufacturing
Manufacturing is the use of machines, tools and labor to make things for use or sale. Also it can be used for selling things. The term may refer to a range of human activity, from handicraft to high tech, but is most commonly applied to industrial production, in which raw materials are transformed into finished goods on a large scale.
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Old 21-12-2009, 09:58 PM   #8
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Default Ðề: Khai triển ống côn

ban lam the nao vay
minh lam mai ma khong duoc
lenh flat luc dau dung the nao de duoi no ra, ban pass cho to nha
Glossary of Engineering Terms (wiki quotes): What is Metallurgy?
Metallurgy is a domain of materials science that studies the physical and chemical behavior of metallic elements, their intermetallic compounds, and their mixtures, which are called alloys. It is also the technology of metals: the way in which science is applied to their practical use. Metallurgy is commonly used in the craft of metalworking.
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Old 07-05-2010, 07:28 PM   #9
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Default Ðề: Khai triển ống côn

Bạn dùng phần mềm khai triển hình gò, phần mềm này có thể khai triển các hình côn cút rất nhanh và chính xác, phần mềm tên là Plate Sheet
Glossary of Engineering Terms (wiki quotes): What is Steel?
Steel is an alloy consisting mostly of iron, with a carbon content between 0.2% and 2.1% by weight, depending on the grade. Carbon is the most common alloying material for iron, but various other alloying elements are used, such as manganese, chromium, vanadium, and tungsten. Carbon and other elements act as a hardening agent, preventing dislocations in the iron atom crystal lattice from sliding past one another. Varying the amount of alloying elements and form of their presence in the steel (solute elements, precipitated phase) controls qualities such as the hardness, ductility, and tensile strength of the resulting steel. Steel with increased carbon content can be made harder and stronger than iron, but is also less ductile.
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This Month's reference reading for better English skills:
Mechanical Engineering:
Many mechanical engineering companies, especially those in industrialized nations, have begun to incorporate computer-aided engineering (CAE) programs into their existing design and analysis processes, including 2D and 3D solid modeling computer-aided design (CAD). This method has many benefits, including easier and more exhaustive visualization of products, the ability to create virtual assemblies of parts, and the ease of use in designing mating interfaces and tolerances. Other CAE programs commonly used by mechanical engineers include product lifecycle management (PLM) tools and analysis tools used to perform complex simulations. Analysis tools may be used to predict product response to expected loads, including fatigue life and manufacturability. These tools include finite element analysis (FEA), computational fluid dynamics (CFD), and computer-aided manufacturing (CAM). Using CAE programs, a mechanical design team can quickly and cheaply iterate the design process to develop a product that better meets cost, performance, and other constraints. No physical prototype need be created until the design nears completion, allowing hundreds or thousands of designs to be evaluated, instead of a relative few. In addition, CAE analysis programs can model complicated physical phenomena which cannot be solved by hand, such as viscoelasticity, complex contact between mating parts, or non-Newtonian flows As mechanical engineering begins to merge with other disciplines, as seen in mechatronics, multidisciplinary design optimization (MDO) is being used with other CAE programs to automate and improve the iterative design process. MDO tools wrap around existing CAE processes, allowing product evaluation to continue even after the analyst goes home for the day. They also utilize sophisticated optimization algorithms to more intelligently explore possible designs, often finding better, innovative solutions to difficult multidisciplinary design problems. Computer Aided Design - CAD:
Computer-Aided Design is one of the many tools used by engineers and designers and is used in many ways depending on the profession of the user and the type of software in question. There are several different types of CAD. Each of these different types of CAD systems require the operator to think differently about how he or she will use them and he or she must design their virtual components in a different manner for each. There are many producers of the lower-end 2D systems, including a number of free and open source programs. These provide an approach to the drawing process without all the fuss over scale and placement on the drawing sheet that accompanied hand drafting, since these can be adjusted as required during the creation of the final draft. 3D wireframe is basically an extension of 2D drafting. Each line has to be manually inserted into the drawing. The final product has no mass properties associated with it and cannot have features directly added to it, such as holes. The operator approaches these in a similar fashion to the 2D systems, although many 3D systems allow using the wireframe model to make the final engineering drawing views. 3D "dumb" solids (programs incorporating this technology include AutoCAD and Cadkey 19) are created in a way analogous to manipulations of real world objects. Basic three-dimensional geometric forms (prisms, cylinders, spheres, and so on) have solid volumes added or subtracted from them, as if assembling or cutting real-world objects. Two-dimensional projected views can easily be generated from the models. Basic 3D solids don't usually include tools to easily allow motion of components, set limits to their motion, or identify interference between components. 3D parametric solid modeling require the operator to use what is referred to as "design intent". The objects and features created are adjustable. Any future modifications will be simple, difficult, or nearly impossible, depending on how the original part was created. One must think of this as being a "perfect world" representation of the component. If a feature was intended to be located from the center of the part, the operator needs to locate it from the center of the model, not, perhaps, from a more convenient edge or an arbitrary point, as he could when using "dumb" solids. Parametric solids require the operator to consider the consequences of his actions carefully. Some software packages provide the ability to edit parametric and non-parametric geometry without the need to understand or undo the design intent history of the geometry by use of direct modeling functionality. This ability may also include the additional ability to infer the correct relationships between selected geometry (e.g., tangency, concentricity) which makes the editing process less time and labor intensive while still freeing the engineer from the burden of understanding the model’s design intent history. These kind of non history based systems are called Explicit Modellers. The first Explicit Modeling system was introduced to the world at the end of 80's by Hewlett-Packard under the name SolidDesigner. This CAD solution, which released many later versions, is now sold by PTC as "CoCreate Modeling" Draft views are able to be generated easily from the models. Assemblies usually incorporate tools to represent the motions of components, set their limits, and identify interference. The tool kits available for these systems are ever increasing; including 3D piping and injection mold designing packages. Mid range software are integrating parametric solids more easily to the end user: integrating more intuitive functions (SketchUp), using the best of both 3D dumb solids and parametric characteristics (VectorWorks), making very real-view scenes in relative few steps (Cinema4D) or offering all-in-one (form•Z). Top end systems offer the capabilities to incorporate more organic, aesthetics and ergonomic features into designs (Catia, GenerativeComponents). Freeform surface modelling is often combined with solids to allow the designer to create products that fit the human form and visual requirements as well as they interface with the machine. Modern CNC Machines:
Numerical control (NC) refers to the automation of machine tools that are operated by abstractly programmed commands encoded on a storage medium, as opposed to manually controlled via handwheels or levers, or mechanically automated via cams alone. The first NC machines were built in the 1940s and '50s, based on existing tools that were modified with motors that moved the controls to follow points fed into the system on paper tape. These early servomechanisms were rapidly augmented with analog and digital computers, creating the modern computed numerically controlled (CNC) machine tools that have revolutionized the design process. In modern CNC systems, end-to-end component design is highly automated using CAD/CAM programs. The programs produce a computer file that is interpreted to extract the commands needed to operate a particular machine via a post processor, and then loaded into the CNC machines for production. Since any particular component might require the use of a number of different tools—drills, saws, etc.—modern machines often combine multiple tools into a single "cell". In other cases, a number of different machines are used with an external controller and human or robotic operators that move the component from machine to machine. In either case, the complex series of steps needed to produce any part is highly automated and produces a part that closely matches the original CAD design.
Source: Wikipedia