Your drawings can not be formed in one single layer roll forming machine if you did not change the rollers.

Thanks for my friend whose name is Prabesh. He shared his idea of roll forming machine with me. I learned a lot of quality problems in his market. This will be better in future. Recently, no one change the situation of this poor quality. Not about the material of roll forming machines. Not about the design of the roll forming machine drawings. The technical level is low. Supporting facilities are not perfect. He sent me two drawings. He told me that they can be formed in one machine. I mean single layer machine not the double layer machine. When i got the drawings, i found that they could not be formed in one roll forming machine if he did not change the rollers of his roll forming machine. Frankly speaking, even we are professional roll forming machine since 1996. Our workers also need a long time for changing the rollers for the machine. But it not mean the machine works very well. The machine should be adjusted again. It is not easy. Thinking is easy. You will find the truth when you do this work.

I will show you the part of the drawings.

Check the drawings now. I find same parameter for you

Same: pitch is 250mm. No problem. So he thinks the two drawings can be formed in one set machine(single layer roll forming machine) Is he right?

Let's see the different parameters.

Height:

the height of first drawing is 35mm and second is 30mm. The rollers of roll forming machines are made by steel. The sizes of the rollers can not be changed by themselves. So it is one different parameter. The problem of the shape of the rollers.

Width:

first drawing: the width of up is 23mm and down width is 67mm. So you will say that there is tolerance in my drawing(He has his design of drawing). Yes, i saw your drawing. 

±1mm tolerance for 23mm. Then final width are 22 or 24mm.

±3mm tolerance for 67mm. Then final width are 64mm or 70mm. Remember these parameters.

Let's see the second drawing

±1 tolerance for 25mm. Then final width are 24 or 26mm

±3mm tolerance for 65mm. Then final width are 62mm or 68mm.

So the problems are coming: 

Let's compare the up width: 22\24mm and 24/26mm. There are (26-22)4mm tolerance. Whose rollers can have so big wrong size. I can not think that. 

Then compare the down width: 64/70mm and 62/68mm. There are (70-62)8mm tolerance.

Oh, my god. The god can not agree with the manufacturer if he can produce this machine for his client. 

At last, we see the ribs of the two drawings.

There are two ribs (1/2/3)in first drawing, The shape of the ribs is corrugated( like the sea water wave).

Now, we check the second. There are two ribs with semi-circle shape. The number of the ribs is different. The shape of the ribs are not same. 

So, friend. Do u understand now. If you change the rollers for the machine. It is no problem if you can do this work very well. But now, do you think the two drawings can form in one single layer roll forming machine with no changing rollers.

I also want to ask you. How about your cutter shape?

Thanks

I think these words can help you understand roll forming machine very well. Even you do not order machine form us. 

Ted

Whatsapp: 008615031898708

Skype: yufa_2

Mail: ted@yufamachinery.com