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MCAD Editor
(Stranger )
10/01/01 02:44 PM
DFM Issues and Challenges Report this article as Inappropriate to us !!!Login to Reply

Is design for manufacturability (DFM) supported within your organization? If so, how and what are the benefits/challenges? If not, do you feel that manufacturability issues need to play a bigger role in product design and development efforts at your company?



NCguy
(Stranger )
11/28/01 09:36 AM
Re: DFM Issues and Challenges new [re: MCAD Editor]Report this article as Inappropriate to us !!!Login to Reply

We pay lip service to DFM, and in my capacity as CNC programmer in the prototype shop, I try to address DFM issues as they come up in the parts I am asked to make. Most of the designers are receptive to my suggestions, but frequently there are design requirements which make DFM difficult to implement. I think a big problem is that few engineers and even fewer marketing professionals have much experience in an actual hands on manufacturing environment. We have development project managers who have no clue what it takes to machine a part.



subras3d
(Stranger )
03/06/07 03:21 AM
Re: DFM Issues and Challenges new [re: MCAD Editor]Report this article as Inappropriate to us !!!Login to Reply

DFM Issues still perists due to less expertise available with the present CAD Engineers who are not well equiped with skills on allied fields like Manufacture and Physical Product Development Recently I have given a Level 1 Training for DFM here for the CAD Engineers I am on the job of developing a Level 2 for them

Ultimate is ONLY CONCURRENT ENGINEERING



tomlehn
(Stranger )
03/08/07 06:26 AM
Re: DFM Issues and Challenges new [re: subras3d]Report this article as Inappropriate to us !!!Login to Reply

It used to play a major role in all our designs, however in the past several years it is no longer a strong requirement for many clients. There are two main reasons for abandoning DFM (reluctantly).
1. 99.9% of most of the manufacturing for the majority of our clients are accomplished overseas. Almost anything that previously thought impossible to manufacture is now possible for various reasons including technology, manpower, and cost of goods. This is a topic in itself.
and
2. "We" as engineers have typically cursed Industrial designers for designing products that are virtually impossible to manufacture. However its these same ID's that in fact present challenges that normally would not be addressed and therefore in essesnce actually drive innovation. Lets face it, if engineers are not pushed to come up with solutions to complex situations, we would all be living to candlelight.




shridhar
(Stranger )
05/02/07 08:41 PM
Re: DFM Issues and Challenges new [re: MCAD Editor]Report this article as Inappropriate to us !!!Login to Reply

In our organization the DFM is the part of any ongoing Design & Development process. In the entire development phase of product realization, we have many iteration (cycles) of design & proto builds. The execution of the protobuild is carried out by NPI (New Product Introduction) team along with the manufacturing or process counterparts. The primary objective being to validate the existing design & to make the product ease of manufacturing. As the product approaches the Volume production there will be tremendous pressure on output & to meet the cycle time for each individual process. The manufacturing team will look into the bottleneck in each of the process & work on designing fixtures to improve cycle time or on breaking up the processes in different stations to balance the production line. The early feedback of DFM inputs to the Design team will help them to improve the final design concept keeping the design intent intact, which in turn helps in reduction of number of iterations & hence the time to Market.



subras3d
(Stranger )
05/17/07 11:29 AM
Re: DFM Issues and Challenges new [re: shridhar]Report this article as Inappropriate to us !!!Login to Reply

Dear Friends
I was fortunate enough to contribute to a Staff Development Programme on Design For Manufacture & Assembly under the sponsorship of All India Council of Technical Education - AICTE -hosted by the Amrita University , Coimbatore , Tamil Nadu - India - 12 DAY WORKSHOP
Infact I conduted the workshop for about four hours on '
DFM for CAD Engineers ' there I have presented Three levels of DFM for CAD Engineers in that August Forum attended from all over india with case histories for my Level -1 , DFM & Concurrent Product Eevelopemnt of a novel Rotary Tablet Press and gave a curtain raiser OF my
' SUBRAS SMART DFM '
a new practical methodology I am on the job now for developing the DFM Methodology by Designing and Developing a novel Light Duty Three Wheeler by adopting my Level -2 which will ultimately lead to be a live case history for my pragmatic Methodology on DFM -
' SUBRAS SMART DFM '
Pl visit http://subrassmartdfm.blogspot.com/
I welcome contributing partners to further develop my
DFM - Design For Manufacturability - for our mutual benefits

Er Ramalingam K S
subras3d@yahoo.co.uk



bhaskar
(Stranger )
01/21/10 05:21 AM
Re: DFM Issues and Challenges new [re: MCAD Editor]Report this article as Inappropriate to us !!!Login to Reply

To address the issues related to DFM at the design stage, by the designers, Geometric has comeup with a CAD integrated (SolidWorks and ProE) DFM tool : DFMPro (http://dfmpro.geometricglobal.com). It identifies areas of a design which are difficult, expensive or impossible to manufacture. 





subras3d
(Stranger )
08/02/10 08:38 AM
Re: DFM Issues and Challenges new [re: bhaskar]Report this article as Inappropriate to us !!!Login to Reply

Hello Bhaskar


Yes I have also noted the recent developments on DFM -integration with CAD .


Thanks for the inputs from your side





slaptopsreview
(Stranger )
03/18/11 03:22 AM
Re: DFM Issues and Challenges new [re: bhaskar]Report this article as Inappropriate to us !!!Login to Reply

DFM Principles

1 )Do not use min rules when not necessary
– Find best compromise between all recommendations
– Pay specific attention to repetitive cells
( i.e., lot of instances per product like standard cells and some sub-circuits in
memories …)
– Take care of critical signals
(noise, timings, matching …)
– Most of the gain comes out from small improvements
2 )Target homogeneous density for each layer
3)And for all of these, do not increase chip or cell area


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kaaren
(Stranger )
04/14/11 04:04 AM
Re: DFM Issues and Challenges new [re: MCAD Editor]Report this article as Inappropriate to us !!!Login to Reply

You ask a lot of questions. I haven't answers on them. But you can use help coursework. This service can help to do this.  





pressbrake
(Stranger )
10/18/11 07:52 PM
Re: DFM Issues and Challenges new [re: MCAD Editor]Report this article as Inappropriate to us !!!Login to Reply

A press brake, also known as plate bending machine, is a kind of machine tool for bending sheet and plate material, most commonly sheet metal, material could be normal steel, stainless steel, aluminum and so on. Regularly, two C-frames form the sides of the press brake, connected to a table at the bottom and on a moveable slide at the top. The bottom tool is mounted on the table with the top tool mounted on the upper beam.
A Press brake could be described and distinguished by basic specifications, such as the force or tonnage and the working length (length of plate sheet). Additional parameters include the amplitude or stroke, the distance between the frame uprights or side housings, distance to the back gauge, and work height. The upper slide usually operates at a speed ranging from 1 to 15 mm/sec.

There are many different types of press brake as described by the means of applying force: mechanical, pneumatic, hydraulic, and servo-electric.
 Hydraulic press brake operates by means of two synchronized hydraulic cylinders on the C-frames moving the upper slide. Servo-electric brakes use a servo-motor to drive a ball screw to exert tonnage on the ram.

SUZOU DAFU MACHINE TOOLS CO.,LTD., is a professional manufacturer of hydraulic press brake and CNC servo-electric press brake. Established in 2003, Suzhou Dafu Machine tools have been engaged indesigning, building and selling hydraulic press brake, CNC hydraulic press brake, guillotines shear and
CNC guillotine shear for many years. Thanks to full attention upon press brake and guillotine shear building, and the great investment in metal processing equipments. Dafu had made agood start in the industry of press brake and
guillotine shear after our products hit market.
    In 2007, due to reliable quality of press brake and guillotine shear we built and sold, Dafu had gained remarkable reputation in Chinese market and Dafu’s share in the market had been kept increasing year by year, at the same period, Dafu started to pay more attention upon oversea market and seek sales increase from global market. In order to pursue quality of machines and service, our boss decided to expand production capacity, and extended workshop buildings 15,000 square meters more, plus original 15,000 square meters workshop, totally 30,000 square meters in total.





dennisse
(Stranger )
12/10/11 08:57 PM
Re: DFM Issues and Challenges new [re: slaptopsreview]Report this article as Inappropriate to us !!!Login to Reply


Hello dude ! I must say, it is one of the most interesting and informative blog I have ever read. Thanks for sharing.
Wow, this was a really quality post. In theory I'd like to write like this too - taking time and real effort to make a good article




 


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