Today, we are going to discuss the "What you can do to avoid raising the machining cost of machined partsI will make a note about Today's article is primarily about cutting parts.
- Those who want to know what kind of component design can be done inexpensively.
- Those who want to reduce the overall cost of machine parts.
- Beginners in mechanical design
The article will be directed to
first of all
I design machines, and I believe it is impossible for an outside designer to know the price of the parts he/she has designed by reading the material, processing, and even SG&A costs of the parts that make up the machine. (Right?)
I will design the parts and draw out the drawings,From there, another person in charge.will be.Unless we are contacted by that person or the machining engineer who will be machining the part, we basically have no access to the price.Things are made without knowing the price.
There must be many such designers.
Recently, I have been learning a great deal from the machining engineers about the drawings I have made.One time this happened.
A woman with little machining experience is working on a slightly more complex drawing that was recently submitted to us.
Tolerance here is a bitch.
No more islands, two parts.
Can't F8 be H7?
I need to buy a drill. It's not the right size.
Not in the machine.Requests such as.
I am learning very much that this is the reason for the cost increase. Thank you very much.
- ENGINEER48 (@48_engineer) April 17, 2020
This one.「This is a very important part. Why didn't I notice this before? Is it time-consuming or troublesome, or does the price go up if you can't figure out whether it can be done accurately or not?」I was made aware of this.I realized that there was a hidden element of cost reduction here.
just now
Unless we are contacted by that person or the machining engineer who will be machining the part, we basically have no access to the price.
As I said, when we are contacted, it may be to discuss where we want to allow for processing, or to suggest whether we can divide the parts into sections. Or, they may make suggestions on how to divide up the parts.
Although there is contact regarding physically impossible machining and precision, drawings are in a sense absolute, and it is a fact that processors with advanced techniques and machines that excel in complex machining can make even somewhat troublesome parts into products.
In other words,We are in a state of potentially high costs and not realizing it.It is.
Especially for designers who seem to design only one-off parts with no prospect of mass production benefits, the possibility of always having to deal with new fabricators tends to keep them out of the price-knowledgeable environment.
The design phase determines more than 90 percent of the cost of quality and 80 percent of the cost."However, it would be a waste if the added value of the machine is eaten up by the cost of parts.
This is where we, the designers, want to start from the beginning with a design that does not unnecessarily raise processing costs.
What machine designers can do to avoid raising machining costs
I'm going to preface this very long, but based on what I have learned from experience and books,What to be aware of to avoid raising machining costs when designing partsMake specific note of the following
In conclusion, the minimum we as machine designers need to be aware of in order not to raise machining costs isDesign the parts so that the machining engineer doesn't have to do anything extra. I think it is. This is the key to starting with the lowest cost.
The above is a broad statement, so I'll be more specific.
- Use materials that are easy to obtain
- Design components that are generally easy to make.
- Shape for easy dimensioning.
- No unnecessary tolerances.
- Avoid increasing processing direction
- Reduce the number of areas to be precision-machined (only the necessary parts)
- Make parts that do not require special jigs
- Provide explanations for items that may be troubling you first.
- Make parts that do not require difficult dimensional inspections
and so on.
I won't explain them in depth, but if you are a mechanical designer, these episodes may come to mind, or they may coincide with something you are somewhat aware of.
As we design, how do we design the parts?
If we design with these details in mind, I think it will be possible to design parts with lower costs in mind.Of course,By determining the function, if the part can be made of sheet metal, lower cost can be achieved.will be.
Finally.
I believe that we, as machine designers, should make constant efforts to increase our knowledge of machining to the extent possible.
What I have written down today is a written version of what I have experienced, but with a "Follow me! Ready-to-go" with machining knowledge and design estimation skills
I was able to answer the question in the section of the book "The Cost" that my awareness is not wrong.
This book isThe book carefully explains how the next process should be taken into consideration, stating that "the next process is the customer for the designer.will be.
I know quite a few designers who have this book.
This talk was mainly concerned with cutting parts, but this book also touches on cost reduction of sheet metal and plastic parts other than cutting parts, so check it out if you are interested.
You don't need to know everything about processing, but the minimum you need is this and this in order to be immediately effective.and I recommend it especially for beginners in mechanical design as they have decided to do so.
In addition, a separate article, "It should be used in the design of cutting parts. How parts should be designed considering cutting process taught by machining meisters.In "The Processing Side," we look at the processing side of theDrawings like this are easy to read. in TokyoEasy-to-process shape and others are also mentioned. Please check there as well if you like.
See also: Drawings / How to draw
That's it.