No, let's say that we need to stop the cylinder at a defined position - at some extended length or if there are more positions along the total length of the cylinder. How do you practically do it? One way is to have sensors in the cylinder, but that is usually for extreme positions. As in...
Yes, I'm working on as simple as possible. That's usually my goal.
One question, maybe for you hydraulic engineers: What is the most practical and robust way of position control for hydraulic cylinders? We sometimes need it on other machines, and any information here is highly welcome.
Okay, thanks for the input. I'm not very skilled in hydraulic systems details, so I was wondering what the second option could cause to the hydraulic system or if there could be any potential problems. That's why I asked under this part of the board. Any suggestions are still welcome because I'm...
Ok, I'm attaching a quick sketch of how I plan to approach this.
In the sketch, you can see the side view of one part of the machine, which has a total length of around 6 m and a height of 1 m. It is a support bench for cylindrical pieces (weight up to 70 kN, length 6 m). We use the bench part...
I could improve in hydraulic systems, but when I design a machine, I sometimes need some details regarding this area and now is this situation.
Let's say we have a machine consisting of a fixed structure and a moving structure. We move the second structure relative to the first one with a...
I agree with the friction comment. One thing I forgot to mention, is that this conical shape is very small, only from tolerances of production errors as 3DDave pointed out. In theory all three axes are parallel, but in real life pipe will travel to one or the other direction when you try to turn...
Perfect. Thanks for this headsup. Sound logical.
No, nothing with pipe deformation. Only moving of cylinder (pipe) front and back on the rollers because of the outer pipe shape being conical - the diameter on one side is smaller than on the other.
This I don't understand. Can you please...
I have a technical challenge, where I need to properly evaluate the axial force of the cylinder (D) rolling on two rollers (d). Data of axial force is needed, because I need to properly design the front and back stopper for the pipe. And because of lack of space (too much to explain here) it is...
Huh, thanks for good answers. I need to study them a bit and get back with answers if I will have them.
One more question. How are your experiences regarding selling products as an engineering office, that turns some money while not working? Don't get me wrong, not trying to sell mist or...
So, the two of us are running a mechanical engineering office for machine design. We are located in Europe. After almost 10 years on the market we arrived to the next step in defining how or business will work.
Or we go stay hourly rate and try to lift the rate every so much time, which is a...
Sorry, I believe that I translate to English too quickly sometimes, before I write. I'm thinking in my language and sometimes I write an expression which is not correct for the question. This was such with saying about "structures". But I usually design some kind of structures that are part of...
Hi saplanti. Thanks for your input. I also understand this. But I must also disagree with you. I'm designing structures in such sectors, that usually nobody cares what code were you following. Just that the product is ready for the market. This are mostly machines, not civil engineering.
I will...
This one from Blodgett is even better:
DESIGN OF WELDMENTS
A lot is the same as in Design of welded structures, but there are some topics that are very specific "How to design..." oriented.
These books are old, but steel very useful. If there is anything more recent and written in such a way...
That is interesting. I have this one and browsed through it today. I decided I won't mention it here, but it was the first to be recommended.
[bigsmile]
Any other?
Can someone recommend some books from the field of welded structure design? If I'm more detailed, I'm looking for something like this, just for other field:
Illustrated Sourcebook of Mechanical Components
or
Search results for konstruktionselemente krahn
What I mean is that, when I design...
Can anyone comment this sector of electric motors: Wheel hub motor?
One company here is looking for R&D engineer and I wonder what do fellow engineers think about technical aspects of the idea. What are the opinions about future applications of this? Pluses and minuses?
My own opinion is that...
RodRico, your comment is right on point, but I'm not the one who wants that someone puts money into this new engine design and basic design is not my idea. Investors were looking for someone to help them bring their design to the finish and it all started with a beveloid gear design that was...
First wish is to start it and keep it under idle rpm for short time. Nothing more for now. And then check everything and decide how to move on. We don't know much what to expect. After that if it will be possible to get to some funding, we will try to correct inital design flaws that will arise...
