Week 3:- BiW Fixture Design Methodologies Challenges

week 3 :- BIW fixture design methodologies challenges

AIM: design methodologies explain the question

1) what is design methodologies ?

answer :

design methodologies :

* in this methodology we learn about three design processes, were going to study how do we proceed while doing a design . and one of the things that we take care of structuring or design tree so we'll be learnings how to structure the design tree, and how to name the particular component or particular assembly, or the part oof an assembly, which is very easy to read and very easy to understand. design methodologies is nothing but the steps followed during the concept designing stages of fixture design. the various stages of design methodologies are,

* purchase order.

* inputs from customer .

*percentage of completion criteria.

*design outputs.

1. purchase order :

*a purchase order (po) is a commercial document and first official offer issued by a buyer to a seller indicating types, quantities, and ad reed prices for products or services. it is used to control the purchasing of products and services from external suppliers. purchase orders can be an essential part of enterprise resource planning system orders. purchase order is a order from customer for start of the work . after offer has been finalized customer will be releasing the LOI/PO(purchase order ).

once PO is released we have to start the work .

after PO from the customer we have to prepare the schedule .

purchase order is the confirmation document from customer to proceed the committed work for them .

2. inputs from customer :

the inputs from the customers are as below,

functional requirements :

the purpose or the function of the fixture will be given as inputs from the customers like what are the process the fixture is going to do i.e welding , riveting, gluing or whether it is a checking fixture, etc.

preferred standards:

as we know different companies follow different standards, we will be following the standards, we will be following the standers followed by the customer . by following standard's the time of designing and manufacturing of parts will be saved . which will be automatically minimizing the time of the projects. as for the standards parts, it

which will be automatically minimizing the time of the projects. as for the standards parts, it can be easily replaced from the used fixture to the new fixture which reduce the cost.

car products:

the inputs we get from car products are GD&T, part list, cad files of car part, clamp plan, product assembly process sheet.

layout:

layout shows the entire assembly plan to understand the process. layout provides the information of flow of parts, station pitch , robot stations, accessories like tool changer & tip dressers, sub assembly links, plat from height , loading /unloading sequence/ height.

ergo data:

as same as preferred standards, different companies follow different standards of ergo data. we have to follow the customer standards of ergo data. the inputs of ergo data will given by

the customer mostly in case of manually operated fixtures/ manual fixtures. the ergo data is mainly used to make the operator comfortable which may lead to improve the efficiency in cycle time & production . ergo data provides inputs like platform height, maximum & minimum reach from operator to fixture , maximum & minimum height of the fixture, whether the child parts/ assemblies are visible while clamping or loading & unloading . also provisos information like loading height, working safety zone of operator , etc.

weld study :

weld study is the important inputs given by the customer . it gives details about the study of particulars gun that we use for welding . also the dates like no/ of weld , position of weld in the components will be given .in short, weld study includes weld gun details, weld matrix & weld points.

standard detailing templates:

this inputs include the detailing templates of 2D cad drawing as per the customer standards. so, we have to follow the detailing templates as per the customer standards.

3. percentage of completion criteria:

percentage completion criteria is basically schedule , what tome that we can complete the entire process again this is more detailed. so when we are going to complete the in entire designing , then we're going to move on to simulation on all these subcategories would be considered in percentage completion criteria like a probability to when we can complete the entire fixture design.

it is followed in the designing stages & dispatch stages of welding fixtures , it helps to track or identify how much task completed & how much to go further for completing a fixture. inputs & concept design -0 to 25%

concept approval & simulation check-25 to40%

design freezing & detailing -40 to85%

check & final dispatch -85 to 100%

the above mentioned percentage are the percentages of stage wise completion criteria of the projects.

4. design output:

in BIW fixture design or any industry. we don't only just design a particular component and just give the CAD file to the customer , we have to give a lot of documents like 3D document ,2D document which is the detailing part, and as well as other factors as well like boom, boom bill of material and other document as well abound this particular component and their standard's, all has to be submitted to the customer.

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