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Thermal Deburring

Thermal energy deburring consists of placing the part in a chamber which is then injected with a mixture of a natural gas an oxygen. When this mixture ignited, a heat wave is produced with a temperature of 33000C (6000F). The burrs heat up instantly and are melted away, while temperature of the part reaches only about 1500C (300F).

This process is effective in very various applications on non-combustible parts. There drawbacks, however: larger burrs or flashes tend to form beads after melting; the process can distort thin and slender parts; and it does not polish or buff the work piece surfaces as do several other deburring processes. (Kalpakjian, Smith; Manufacturing Engineering and Technology 4th Edition; pg. 736,737)


Press Fit Technology

Press fit in electrical connections is similar to that in mechanical assembly, but the part configurations are different. Press fit technology is widely used in the electronics industry to assemble terminal pins into metal plated through holes in large PCB’s. In that context, a press fit involves an interference fit between the terminal pin and the plated hole into which it has been inserted. There are two categories of terminal pins (a) solid and (b) compliant. Within these categories, pin designs vary among suppliers. The solid pin is rectangular in cross section and is designed so that its corners press and even cut into metal of the plated hole to form a good electrical connection. The compliant pin is designed as a spring-loaded device that conforms to the hole contour but presses against the walls of the hole to activate electrical contact. (Mikell P. Groover; Fundamentals of Modern Manufacturing Materials, Processes, and Systems 3rd Edition; pg.850, 851)