METHOD FOR INSERTING DRIVING MEMBER INTO HIGH-TEMPERATURE BILLET

PURPOSE:To drive a driving member deep into a billet with relatively small impact force by forming a pointed heat part to one end of a metallic bar-body, forming an impact receiving part to the other end and acting impact load to said body thereby driving the driving member into the billet having a specific high temp. CONSTITUTION:A temp. measuring instrument 1 is formed with the pointed head part T at one end of the bar-shaped body 4 to be used as the driving member having a circular section and is provided with a flange 5 to receive the impact force to the outside periphery in the upper part. A bottomed hole 7 for insertion of a temp. measuring means 6 is bored to the axial center of the body 4 and a lead draw-out part 8 of the means 6 is formed on the side of the body 4 in the upper part of the flange 5. The means 6 is inserted into the hole 7. Proper repetitive impact load is acted on the impact receiving part to drive the driving member to the prescribed depth into the high-temp. billet of 600-1,400 deg.C. The exact temp. measurement is thus made possible.