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Pipe ends atuo sander (Mechanical design)

To design an auto sanding machine for sanding both ends of the stainless steel pipe made from thin mesh of 1.5mm. The purpose of sanding the both ends of the pipe is to ensure both ends are straight and parallel to each other. The end product is joining these pipes together by means of welding. Typically, both ends are removed [url removed, login to view] each side. The tolerance of each pipe length after sanding is +[url removed, login to view], hence a ball screw mechanism is needed to feed the pipe into both sanders fitted at a fixed position at both extreme ends. The length of the pipes can vary from 300mm - 1220mm. Therefore, both motors if measured from its sanding face to the other motor's opposite should be at least 1500. The pipe OD varies from 73mm to 178mm.

There shall be a table fitted onto the ball screw mechanism and the accompanying slides. The pipe shall be loaded manually unto the machine and manually unloaded from it. The table is usually at "home position", or right in the middle of the machine. As the machine is activated, the table will first move to the right to sand one end of the pipe, and then to the left to sand the other end. It will then return to home position.

Both sanders must be covered with some sort of dust proof shroud. The shroud should have an opening for vacuum ducting.

Picture 1 shows the table, slide, and ball screw mechanism to be used.

Picture 2 shows the existing machine that uses manual labour to grind the pipe end. (Notice the green sanding paper at the other end)

Picture 3 shows the rolled pipes ready for seam weld before sanding the ends. Note there will be a weld bead along the length of the pipe.

Picture 4 shows a concept of the machine I want. Notice the pneumatic actuated stopper attached at the left and right of the table. This is to ensure the pipe end is rigidly pushed against the sanding plate. Notice two anti-slip clamps, this is to prevent the pipe from rolling with the sander as its being sanded. Also, it holds down the pipe securely and prevent it from flying off dangerously. The clamps and stoppers are drawn figuratively, you are free to think of a simpler and more economic way of constructing them without obstructing material loading and unloading. Also, as the pipe length varies, you will need to design some means of traverse adjustment for both the clamps and stoppers. Take note that the clamps and stoppers must be able to accommodate for different diameters as well. I strongly suggest against using jaw type clamps as it would be more expensive to build and less flexible.

Picture 5 shows a hand sketch of the ball screw mechanism.

The process of this machine is as follows:

1)Loads pipe onto machine

2)Push the pipe against the left side stopper (always actuated at the start of the cycle)

3)User press "start"

4)Clamps go down on the pipe

5)Table moves to the right to sand the right end of the pipe

6)Table moves to "home"

7)Left side stopper goes down

8)Right side stopper comes up

9)Table moves to the left to sand the left end of the pipe

10)Table moves back to home

11)Right side stopper goes down

12)Left side stopper comes up

13)Clamps release the pipe

14)User unloads the pipe

15)The machine is ready for the next piece

It would be ideal if you can use Solidworks to model this machine, otherwise any 3D CAD will do.

This project will consist of two stages.

The 1st stage is to design out the machine in a "Concept format". This format does not require any detailed drawings or minute details such as bolt mountings, final dimensions, etc. A simple drawings with some notes of how it works, and basic representation of the main components will do.

The 2nd stage is the fabrication process, whereby all technical drawings must be submitted. The model must be as detailed as possible. You will also need to design enclosures for this machine to cover up the components to prevent others from seeing how it works, it also serves to improve the look of the machine.

Not enough text, see attached a.txt.

Квалификация: CAD/CAM, Техническое черчение, Производственный дизайн, Технология машиностроения, Solidworks

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О работодателе:
( 3 отзыв(-а, -ов) ) Johor Bahru, Malaysia

ID проекта: #1306733



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