Without seeing the part or pictures it is just a guess, first thing that comes to mind is the part is not shown normal to the face and on a slight angle and another thing is if the plate/sheet is shown flat, however there are cutouts and these cutouts are cut at an angle they would show double lines as well..
Thanks for Reply..
But i had placed a flat pattern view on that Bending details are there in (.txt) format. I converted that view into .dxf. In the dxf file it is same as in slddrw. But when save as it to Lantek CNC Cutting Software that single lined (.txt) format is changing into another format & in double lined...
I don't know how it's happening & what has to be done...