Abstract: A method for manufacturing a pipe connector for a gas isolated switchgear has the steps of preparing a material block, a first forging process, a second forging process to form the material block to an I-shaped member, defining a passage through the I-shaped member, stretching the I-shaped member, a first heat treatment process (T4 process), straightening the I-shaped member to a desired length and a second heat treatment process (T6 process). With such a method, the processes for manufacturing the pipe connector are simple, and the cost for manufacturing the pipe connector is low.

Abstract: A method for manufacturing a leg of a chair includes step 1 for preparing a metal ingot; step 2 for bending the metal ingot to be a V-shaped member; step 3 for forging the V-shaped member to have recesses defined therein; step 4 for removing the flash from the V-shaped member; step 5 for applying a first heat treatment process; step 6 for adjusting the V-shaped member precisely and step 7 for applying a second heat treatment process to the V-shaped member in step 6.