Help with the design of a part

Other sections 3D Printing
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Hello everyone, I'm new to this forum, I'm coming a little bit urgently....

I am in the final year of STI2D with the option of ITEC in my final year, so I am doing my project which is coef 12 for the baccalaureate. Our project consists of making a system to allow a surveillance camera to move for a greater field of action.

So roughly speaking, you will have to use a fixed rail, with a kind of mobile trolley that will translate along the rail thanks to a motorization system.

 

My parts are finished (SolidWorks) and normally correct, but I didn't have time to do the 3D mecha sim, I wouldn't have time to do the complete prototyping because printing my 3 parts is going to be expensive and long (right that has only one chance of printing because of the size of the parts) which means that I won't be able to do the assembly and so finish the project.

Then comes my request for help, although I don't like to do that, for the design of my pieces: let me explain

During this project we will only be able to do prototyping with a 3D printing machine, but we still have to act as if we were going to mass produce these parts. Due to lack of time to do this step correctly and by an oversight on my part (and 1 week from the end) I would like to have help with the manufacturing method of the parts I made (see attachments)

Whether it's by injection molding, machining etc... I have to find the most suitable method for my pieces and ideally in which material to make them.

So here is if you can give me advice and help me to determine this part of my project, I will be very grateful knowing that I have to do it in 1 week, and it sucks...

Thank you in advance for  your help, and excuse me if I'm off-topic, I don't know where to post this question, and as I'm in a hurry... Here

 

 

I have to do the inverted T-rail, the carriage as well as the motor mount.

The rail is 2 metres long and about 10 cm wide

The trolley is 19cm long 

(Excuse me, I could only do screens and I didn't have time to do the trolley one alone)

 


capture.png2_.png
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Hello Eric,

If I understand correctly, would you like to have our opinion on the manufacturing methods of the parts you have put in photos?

For a simple translation system, I find that this principle will be very expensive, there are simpler ways to make an object move on a rail:) I understand that you are a little short in terms of time to study other things..

I'm willing to give you a helping hand but you should tell me more simply what you need

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Hello, thank you for your answer
Yes, I'd like advice on which manufacturing method would be the most suitable, as well as the material (I didn't have time to do a simulation on SW) We have to stop at the prototype stage (3 d printing) but we have to imagine that we produce the parts in series for a real use

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Hello

For your prototype, 3D printing is good but if you have to industrialize it. It's a little more complicated.

Regarding your rack, for the function you are looking for it will cost you a lot of money. Maybe you can replace it with a simple belt.

For your machined parts, try to redesign with the sheet metal function on solidworks, it's simpler and cheaper. you can take raw sheet metal that you will galvanize or galvanize, you can look at the steel dealers near you and even ask for prices.

Your bearings, in commerce.

For your T-shaped guide profile, it's going to cost you a lot unless you find it in the store too. Why not use some standard things?
Don' t hesitate if you have any questions.

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Hello

I don't know if your project is still relevant but there is a small bone in your design because your pebbles are not the right shape and should have different support points. Your part of the carriage will therefore rub and you risk an archbut. This is due to the fact that you make the assumption  that there is only the effect of weight that causes a vertical force and that therefore everything will rest on the pebbles.

But this is not true because the gear wheel will tend to want to make it come out of the rack which means a radial force and also cause a slight rotation which will make your carriage rub everywhere.

For the rest, an aluminum T-profile corresponds perfectly to the need or better a square profile. Drop the rack and get a belt as already said but a toothed belt with a toothed pinion on the motor.

Waiting for your reaction :-)

A trick used by almost everyone is to have the motor attached to one end or middle and attach the  belt to the cart. This avoids the problem of the electrical cable and the inertia due to the weight of the motor.

Before talking about simulation, it is necessary to make a good  design, taking into  account the following parameters: the weight of the camera,  the speed of movement (including speed, acceleration and deceleration), the total weight of the trolley.

A piece of advice, rather than making the trolley yourself, look at what exists on the shelves (for example at igus https://www.igus.fr/product/930), it will at the same time solve all the problems I mention above.

To Plutarch

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Thank you for your answers, but unfortunately I won't have time to modify anything in terms of design, I'm supposed to hand in my whole file this Friday.

Thank you for your help, I'll try to do my best to get a good grade:) 

 

 

 

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So I wish you a good grade

That's already pretty much what you did :-)

Kind regards