Aspects of Mechanical Design Engineer San Francisco CA

There is a lot of information on mechanical design floating around. The student is encouraged to look into this body of information and apply it to their Drafting and Design Engineering San Francisco CA. Here I present just a few basic “pointers” commonly used in Engineering Design. 

Mechanical design problems usually start with some sort of problem statement. What are we trying to do or improve? Why? Generally it will be “blurry” at first, i.e., something like: “Improve fuel consumption of the Campro Engine”, or “Decrease cost of the torchlight”. We must help define the problem by focusing on the constraints, e.g., “Improve Fuel consumption, but do not reduce power, cost can not increase by more than 2%, Emissions …” 

Economics will always be an important factor. Any potential solutions should include economic analysis as well as a timeline, as time in money. Manufacturability is another important factor. For example you can design an engine modification to save energy (say replacing your current engine with a more “high-tech” engine), but if the energy required to make the modification (i.e., Manufacture the new engine) is more than the expected savings of energy from the modification, then it is a waste of time. 

Energy is another important factor Efficiency may or may not be an important factor. In a power plant efficiency is crucial: It will be worth it to improve the efficiency of the plant by 2% even if it costs 1,000,000 RM to do so, if the plant burns 50,000,000 RM of natural gas per year. 

In this case the “payback period” of the modification is only one year, and large plants typically have life times of >20 years, meaning you just saved 19,000,000 RM over the life of the plant! With a wind turbine the efficiency is not important, as the wind is free, but the installed cost and cost of maintenance is. 

This is related to efficiency (less efficient turbines require larger rotors, and heavier towers), but a less efficient, less expensive system might work out to be the best choice. 

You are a Mechanical Design Engineer San Francisco CA! Once you have data you need to start calculating the other important parameters. Make simple models first, then get more sophisticated as your data and techniques improve. Be sure to check your work with common sense: if you calculate that it will take 14.652 A to run your walkman, you have a serious problem! Often you can “test” various hypotheses or options in the model much easier than you can in actual hardware for example how long will it take a window crank motor to open the steel door? 

What is the Difference Between Design and Drafting?

In the engineering and mostly in the architecture industry, design and drafting are staple and common words. Design involves the initial phase of the project of any architectural endeavor, whereas, the drafting phase is the process in which the ideas come alive in form of shapes and structures. This phase gives birth to drawings and models to make sure that the professionals are able to fulfill the clients requirements.

The demands of Drafting and Design Engineering San Francisco CA vary from client to client, as some may just need the interior design, whereas some would require the detailed architectural drafting that encompasses everything inside the building including its landscape drawings and blueprints. The role of the design and draft engineers is to conduct the whole process of creating designs for the purpose of remodeling the architectural entity of the client. From a building a new building to overhauling the existing architectural project, design and drafting follow a highly organized and sophisticated approach to each project.

Now let's take a look at the process of designing and the intricacies involved in its process and after that we will delve into drafting.

Designing

·      The design process is the initial phase of creating drawings that specifically caters to the requirements for the concepts to be in alignment with the expected outcome.

·      Basically , in order to please the client, various elements and methodologies are used in the design process in a standardized manner to achieve the desired result.

·      For accomplishing this complex process, the engineers and architects use a variety  of computer-aided programs to sketch the initial draft of the architectural drawings. After several meetings and discussion of the client and the engineers, the designers work on the modifications, if suggested by the client.

·      Otherwise, if the design gets approved by the client, then the process of finalizing the details of the design takes place.

·      In the highly creative process of designing, the engineering or architectural project is broken down or categorized into feasible chunks as it eases out the management process. The design undergoes various amendments and changes depending upon the requirements of the project and the client.

·      The design engineers or architects are responsible for producing drawings that adhere to the accuracy of the size and shape of the desired model.

·      There are various elements that are involved in creation of a design plan, these elements are blueprints, engineering drawings, circuit drawings, and business processes. It literally is an act of transforming a hypothetical non-physical idea into an existing architectural project.

·      Due to the involvement of a wide variety of aesthetic and functional aspects in the design process, this process is considered to be one of the most palpable aspects of an architect's work.

·      Hence, to bring full justice and quality to the design of the model, various engineers and architects collaborate together till they complete the project. These are the men behind the design & construction of buildings, bridges, flyovers,etc. Thus , in one line, designers are the people who bring ideas to life on paper.

Drafting

·      After the design gets approved from the client after possibly various modifications or amendments, the finalized details of the design are then sent to the drafting team.

·      Drafting is basically a process in which the precise representations of buildings, statues, bridges, or roads, are created by analyzing the project from various angles such as the top view, main view, and the side view of the project.

·      These representations are then used as blueprints for constructing the final draft of the architectural drawings.

·      The drafter is basically assigned with the responsibility of transforming the designs and ideas of the designers into systematic drawings. Basically, the purpose behind this idea is to work on the presentation of the designs that are in the stage of infancy and also ensure that the designs are compliant with the actual requirement or vision of the client.

·      So, the responsibility of the drafter is to create authentic and precise representation of projects for engineers.

·      Drafting and Design Engineering San Francisco CA can be implemented simply using the hand or using sophisticated programs like CAD in 2D or 3D. These computer aides programs allow that drafter to create technical drawing without any hassle and with correctness to detail.

·      Further, these architectural drawings are then used as blueprints for constructing engineering plans for various projects like building houses, machinery, appliances, pipelines, buildings, towers, huts, bridges and much more. To put it in an easier language, drafting is the art that succeeds the process of design for simplifying the minute intricacies involved in the project, so that the client can easily comprehend the vision of the architect or engineer.

·      This is why drafting is considered as the subsequent phase of the designing process as it provides the technical specifications of the project at hand.

·      Drafting is a highly exhausting process as the drafting professionals need to be skilled enough to deal with minute intricacies and details of the structu`re. In layman's language, it is the graphical representation of the construction or project which is used as a step that determines how the project shall proceed.

·      The draft engineers or drafters utilize the architects drawings to create a physical model of the construction with high accuracy or precision to ensure that the project is made in alignment of the clients needs. Therefore, creating blueprints, templates, and 3D drawings are a vital part of the good drafter’s skill -set.

Finite Element Analysis (FEA)

Finite element analysis (FEA) is the modeling of products and systems in a virtual environment, for the purpose of finding and solving potential (or existing) structural or performance issues. FEA is the practical application of the finite element method (FEM), which is used by engineers and scientists to mathematically model and numerically solve complex structural, fluid and multiphysics problems. FEA software can be utilized in a wide range of industries, but is most commonly used in the aeronautical, biomechanical and automotive industries.

A Finite Element Analysis in San Francisco CA comprises a system of points, called “nodes”, which form the shape of the design. Connected to these nodes are the finite elements themselves which form the finite element mesh and contain the material and structural properties of the model, defining how it will react to certain conditions. The density of the finite element mesh may vary throughout the material, depending on the anticipated change in stress levels of a particular area. Regions that experience high changes in stress usually require a higher mesh density than those that experience little or no stress variation. Points of interest may include fracture points of previously tested material, fillets, corners, complex detail and high-stress areas.

Creating Finite Element Models

By using beams and shells instead of solid elements, a representative model can be created using fewer nodes without compromising accuracy. Each modeling scheme requires a different range of properties to be defined, such as section areas, plate thickness, moments of inertia, bending stiffness, torsional constant and transverse shear.

Simulating real-world working environments

To simulate the effects of real-world working environments in FEA, various load types can be applied to the FE model, including nodal (forces, moments, displacements, velocities, accelerations, temperature and heat flux), elemental (distributed loading, pressure, temperature and heat flux), as well as acceleration body loads (gravity).

Types of Finite Element Analysis in San Francisco CA include linear statistics, nonlinear statics and dynamics, normal modes, dynamic response, buckling and heat transfer. Typical results calculated by the solver include nodal displacements, velocities and accelerations, as well as elemental forces, strains and stresses.

Benefits of FEA

FEA can be used in new product design, or to refine an existing product, to ensure that the design will be able to perform to specifications prior to manufacturing. With FEA you can:

·      Predict and improve product performance and reliability

·      Reduce physical prototyping and testing

·      Evaluate different designs and materials

·      Optimize designs and reduce material usage

Why is Prototyping Important?

The journey of building a product involves various steps to reach the level where it can be pushed to production for the mass audience. Each product has a certain target audience and solves their pain points in some way. To evaluate, whether the product really solves its user’s problems, an almost working model called a prototype is created and tested with the prospective users and stakeholders. 

So, for understanding the exact need and expectation of your target audience you first need to create a mock up, get it approved from stakeholders, collect feedback, consult your collaborators, make changes and then iterate the process until you have clear visualization of what you need to build as the final product. 

It is easier to collect feedback and make changes to your product at any early stage than when the product is near ready. Thus, it saves effort, cost and helps you steer the product in the right direction. 

What is Prototyping?

A prototyping is a sample or mock up of the final product that we want to achieve. A Prototype design service in San Francisco CA is a quick model explaining the actual plans for the final product. 

It could be something as simple as hand-drawn sketches, integrated together to demonstrate the product to a fully functional product, which the stakeholders and users can feel and use. In a nutshell prototype is an early iteration of the product, demonstrating its core functionality.

Importance of Prototyping

Btter understanding of the design intent:

Prototyping not only presents a strong visualization of the design to understand the look and feel of the final product but it also helps the term to comprehend better why they are designing , what they are designing and for whom they are designing.

Early Feedback:

One of the most important aspects of the product building process is to gather feedback. With prototyping you can collect reviews at every stage of developing the product.

Test what is working for the audience and what is not. Define goals with your team members, the management terms, external stakeholders, SMEs etc, and come to the best collective decision.

Early changes save time and cost:

Changes towards the end would mean not just radical restructuring but also more speculation and rework. With a preliminary model  ready it is always possible to make the desired changes early, because by that point no investment or effort has gone into creating the full product. Thus, early changes help you achieve your goals faster.

Validation before development:

Prototype design services in San Francisco CA allows having multiple discussions between iteration before getting into final development. This iterative process makes it easier for you to have surety in what you are building is actually what is needed.

Rapid Prototyping- A Part of Mechanical Design

What is Rapid Prototyping?

Rapid prototype or rapid prototyping is relatively a new term and in simple words, it is created to quickly evaluate the visual and functionality of an engineering product's design.

A prototype in an Engineering Design San Francisco CA product design that is used to test the technology, evaluate the design, or analyze the working to provide product specification for a real and working system.

Prototypes are an integral part of engineering product design and more importantly, it is an overall development process of new products. In the new product design process, rapid prototyping can be executed at any stage of the product development cycle. It can be used for any component or subcomponent repeatedly.

The prototype can be used in other contexts like in semantics, software programming and application development, etc, although the purpose of using a prototype in other contexts is the same.

Types of Prototyping in product design

The categories of prototyping depend upon the required degree of accuracy (Fidelity) or at the stage of product development where it is used. 

Fidelity types of prototyping

Prototypes don't need to look like final products, it can vary according to the needs of the product design engineer that is required to achieve the final product. A rapid prototype can be categorized in terms of accuracy. The degree of the prototype may vary from basic low-fidelity to high-fidelity in its appearance, functionality, size, and user interface.

What is a Low-fidelity and high-fidelity prototype?

·      Low-fidelity prototype

A low-fidelity prototype can be quickly produced and a simple prototype. It is used to test the border concept of the final product. An example of this type of prototype is Paper sketches to cardboard mock-ups.

·      High-fidelity prototype

In a High-fidelity prototype, the appearance and functionality of the prototype are closer and similar to the final product.

NPD stage types of Prototyping

Product design, prototyping process of the build, review, and refine classified into four major stages of the design process. These major stages are:

·      product planning,

·      conceptual design,

·      embodiment design

·      detailed design  

The major parts further divided into the following prototypes:

·      Proof of concept prototypes

·      Demonstration or presentation model prototypes

·      Functional prototypes

·      Aesthetic or industrial design prototypes

·      Final factory sample

·      Alpha & beta build prototypes

What is the importance of Prototyping in Mechanical Design?

In the competitive environment of these days, companies continuously develop and introduce new products to their consumers. In the fast-moving modern days, faster development of products and innovation of new technologies is the key to the success of companies. Due to these reasons, the importance of rapid prototyping is also increasing along with fast-moving technologies. Here are some points that can be achieved by rapid prototyping:

·      Prototyping plays a vital role in the faster development of new products.

·      Early-stage concept validation of fit, form, and function of the Engineering Design San Francisco CA.

·      Final stage product verification against the business objectives and technical requirements.

·      Rapid prototyping allows functionality testing to achieve the goals of the final product.

·      Prototyping gives the hands-on user experience to get feedback.

Types of rapid prototyping techniques

Mentioned below are the types of rapid prototyping technology available for the Mechanical Design Engineer San Francisco CA:

·      Additive manufacturing

·      Stereolithography (SLA)

·      Selective laser sintering (SLS)

·      Direct metal laser sintering(DMLS)

·      Fused Deposition Modelling (FDM)

·      Binder jetting

·      Poly jetting

·      Other techniques

·      CNC Machining Prototyping

·      Vacuum casting

·      Investment casting

Advantages and Disadvantages of Rapid Prototyping

Advantages of rapid prototyping

·      Reduced design & development time

·      Reduced overall product development cost

·      Elimination or reduction of risk

·      Allows functionality testing

·      Improved and increased user involvement

·      Ability to evaluate human factors and ergonomics

Disadvantages of rapid prototyping

·      Lack of accuracy

·      Added initial costs

·      Some rapid prototyping processes are expensive and  not economical.

·      Requires skilled labor

·      Material properties cannot be matched

·      The range of materials are limited

·      End-user confusion

·      Overlooking some key features due to lack of prototyping process.

Machine Designing Process

What is the job of an Mechanical Design Engineer?

The mechanical design engineer job demands a diversity of everyday tasks that center around the big picture of a project. Depending on the project, the mechanical engineer will spend a lot of time on one aspect of the creation process, which is a strong way to make the other parts easier. They may juggle various projects at once and change tasks throughout the day. Mechanical engineer responsibilities include:

·      Designing equipment modifications and system changes

·      Evaluating current systems for weakness and opportunities for improvement

·      Creating, building, and testing multiple designs

·      Calculating the cost of the improvement versus the benefits to the company

·      Presenting budget proposals for the creation of additional tools to improve production

·      Listening to employees and floor managers to understand their problems

·      Analyzing the financial costs of production and looking for waste

·      Recommending changes based on beta-testing

·      Training employees and managers on the new equipment and its effectiveness

·      Planning long-term system overhauls and changes

·      Reporting results to colleagues facing similar challenges

·      Isolating design tests from other tests to ensure results accuracy

·      Documenting specifications and design needs for launch

Mechanical Engineers San Francisco CA typically work in an office environment for a large company or an engineering agency. They will be given a desk, computer, and phone. Depending on the company, they may have a drafting table, though today most companies create blueprints and prototypes digitally. They may also receive a laptop or tablet to bring with them when they have meetings in different parts of the company, or for working at home.

While Mechanical Design Engineer San Francisco CA spend most of their time at their desks, they also need to walk around to visit different parts of the production process. This may require several hours on the production floor or in the distribution center learning how everything operates. These environments can be loud and uncomfortable, depending on what the company produces.

Some mechanical engineers work on a contractor or freelance basis. This gives them the opportunity to work from home, though they may have to travel extensively to meet with clients and check on different projects. The mechanical engineer is typically traveling between the office and work site to better understand the problems and needs of employees.

When looking for a mechanical Engineering Design San Francisco CA job, look for regions with a strong manufacturing economy. Cities like Detroit are always looking to improve their processes and create products more efficiently and safely.

What are the steps involved in Machine Design Procedure?

·      Understand the Requirements:
The first step of Mechanical Design Engineer San Francisco CA a high performance machine is recognising the need i.e. understanding the purpose of design. Preparing a complete statement of the problem that includes details about the aim or purpose for which the mechanical design project is proposed.

·      Analyse and Evaluate the Design Mechanism:
Shortlist and analyse various possible mechanisms for the machine. Select the best mechanism for your design that will give this machine the desired motion.

·      Analysis of Forces:
Analyse how every component of a machine will fit in and interact with each other, also analyse what forces act on each and every component of the mechanical equipment and the energy transmitted by each component.

·      Design of Elements:
All the components of equipment are subject to stress and other forces during operation. These stresses affect the strength of the machine. Hence analysing these stresses is important to design mechanical equipment that is durable and can endure the stresses of real world working conditions.

·      Material Analysis and Selection:
Based on the analysis of stresses that work upon the machine components individually select the appropriate material for machine component design.

·      Design Iteration for Manufacturing:
Design changes that do not affect the performance of the product but facilitates easy manufacturing the machine and its components is advisable.

·      Creation of Detailed Mechanical Drawings:
Create the detailed drawings of each component and assembly of the machine. Complete specification using CAD capabilities can be of great assistance for the manufacturing process.