The designer may seek to combine parts to reduce assembly steps, quantity of parts and hardware. Many engineers automatically separate the two into DFM and DFA since they have been defined separately for several years.
Design the product so it may be assembled from the bottom up using gravity to your advantage. There was a display system that operated a piece of equipment used outdoors which has inherent vibration during operation and experiences heavy usage.
Quality-One provides Knowledge, Guidance and Direction in Quality and Reliability activities, tailored to your unique dfm case study pdf, needs and desires. DFM techniques are focused on individual parts and components with a goal of reducing or eliminating expensive, complex or unnecessary features which would make them difficult to manufacture.
A few of them are listed below: If this is not done, the impact could range from non-value added motion and part movement to possible operator safety issues or requirements for special fixtures or lifting devices. With enough thought put into the design of an assembly many of the parts can be made mistake proof.
Conventionally, the design engineer designs the product then hands the drawings to manufacturing who then determine the manufacturing and assembly processes. Can the parts be combined without need for any special process or tooling?
The designer should consider where the assembly is going to be performed and the tools or equipment that will be available.
Higher quality at a lower cost usually means more sales and greater customer loyalty. If that is not possible, consider breaking it down into logical sub-assemblies. But if you think about it, they must be integrated to prevent one from causing negative effects on the other. Customized combinations of the modules can be delivered to the site and installed quickly. One design recently observed utilized one size and type of self-tapping screw for every sub-assembly and the parent assembly.
Modules allow for greater outsourcing of parts and assembly modules, freeing-up manufacturing capacity and increasing the number of products delivered on time Modules provide for easy and quick installation of products at the site saving labor and time Modules improve servicing and maintenance of products as well as reduces the number of service parts that need to be stocked at the dealer Modular assemblies can also be improved with minimal effect on the rest of the product Design for Automation There are many obvious advantages to designing products or parts for automation.
Dfm case study pdf Common Parts and Materials Whenever possible the design should incorporate common parts and materials, including parts already in use in other similar products or assemblies.
Competition for business is fierce.
For example, if the product is sold as a kit and assembled in the field by the customer, it is different than if it will be assembled on an assembly line or in a work cell. Reduction in labour cost and time 5.
The following list contains some examples: Cover letter f&b of the advantages to modular design are listed below: Incorporate simple patterns of movement in your assembly process and minimize steps. Can the part be manufactured using the same material as other parts?
There are many guidelines for ease of assembly.
Allows for damaged part to be easily replaced if damaged 2. The designer dfm case study pdf avoid use of parts that can easily become tangled in the container or that are difficult to pick up and handle.
If combined with another part how does that impact ease of possible disassembly? Parts should be designed so that they may be easily grasped, oriented and placed in an assembly or weld fixture. Reduce Quantity of Component Parts and Simplify Part Design The designer should review the assembly design part by part and determine if any part can be eliminated or combined with another part.
If the resulting parts are difficult or expensive to manufacture then you have gained nothing. Ease of fabrication and repeatability 2.
These results were used to develop scores for academic, social, and mental adjustment. This study collected survey responses from Notre Dame students in their sophomore, junior, and senior year.
Design Parts for Ease of Fabrication Use of common component throughout Product Cnc machinist cover letter sample However this principle applies to the chair seat One process required to create seat Injection Moulding Advantages of using this principles: Always allow for adequate tool clearance and assure the operator can see what they are assembling, with no hidden interfaces or attachment points.
They must be quick to market with a high quality product or be left behind. Here are a few ideas to think about: Common component throughout Product A 3. There are several basic principles that can be applied to improve parts handling and orientation. Reduced operator labor costs and indirect labor costs Something else to consider is the fact that automated production can require less flexibility in design than manual production.
Competition for business is fierce. It was also found that the cable connectors did not lock into place and would sometimes vibrate out, breaking the connection. Drawings should consistently indicate the proper origination when fed into a process.
Determine if improved process capabilities are required early in the design or program schedule to allow time for any process improvement activities and the establishment of proper process controls. A good rule of thumb is that most components should be within two steps from the point of assembly and common hardware and tools within easy reach.
Limited confusion or complexity in assembling Product A 3. Through reduction of component part quantities you also reduce the amount of hardware and the number of assembly steps required. If combined with other parts how would it impact ease of manufacture?
This will help prevent incorrect hardware being used or used in the wrong location. This slows production and can increase waste due to damaged, dropped or lost parts. Chamfered or radius corners should both be allowed if it will not change the function of the part. If they are required, consider weld nuts or nuts solar thesis are captured in the part. The application of the DFMA method results in shorter assembly time, lower assembly cost, elimination of process waste and increased product reliability.
Product A is a normal educational chair that is commonly used throughout Ireland Simple chair design that is effective and provides the function of a chairs without aesthetically design given to it Product A requires a number of processes to be completed during its manufacturing.
You must also use self-locating parts, simple parts-presentation devices and literature review on employee turnover the need for clamping or securing parts during assembly or processing. Use radii and chamfers when possible to reduce chance of operator injury.
Always consider assembler and operator safety in all designs. Advantages of using this principles: When designing for assembly, remember the simpler the design the easier it is to assemble. In an effort to maintain business and achieve growth many manufacturers are continually developing new products to widen their customer base. The goal is reduce the assembly time and cost.
Avoid heavy or oversized parts that will require lifting devices or may increase worker fatigue and risk of injury. We must work together to accomplish both goals. Whether a product is assembled by machines or by operators, the designer and the mechanical engineer should work together to ensure that labor cost, overhead and materials are reduced as much as possible.
The displays were failing due to types of essay and their meaning fragile ribbon cable that became brittle over time and would break.
Requires one process to create seat 3. Avoid tight tolerances beyond the proven capability of the manufacturing processes. A shorter total time to market frequently results in lower development costs. Some particular guidelines to review are as follows: Ease of mass producing Product As seat 4.
Minimize the variety of hardware required for assembly Consider the use of connections integrated into the parts such as snap fit or tab and slot Evaluate other bonding techniques with adhesives Match fastening techniques to materials and product functional requirements Consider ease of disassembly for service and repairs Modular Product Design Modular design is becoming more prevalent in many buying thesis online.
The designer should also avoid the need for any special adjustments or alignments in the assembly process. Increased process throughput or efficiency. When possible design parts that are symmetrical along both axis.
An example would be how parts are oriented into a brake press for either bend up or bend down operations.