Where do I find the map to make the robot (welding tool) please ?

go to egypt and go to left side, u will see a man that sell one key for 30k.
Buy the key and go to Cairo, enter in pyramid go to left hand side dont up the stairs just go to the left of stairs there have a secret passage.
Use that key there and will open a passage, enter and click in treasure chest, u need to beat a sphinx and 3 mummies, win and get the reward:
Robot design

THANKS ZATO FOR YOUR HELP !