Sanyo Machine Works, Ltd.

Katsuhiko Asai

Koichi Ishihara

Kazuo Shirai

In a hemming structure of metal plate material with an edge portion ( ) of an outer panel ( ) hemmed over an edge portion ( ) of an inner panel ( ), the edge portion ( ) of the inner panel ( ) has an inside rise portion ( ) having a surface plane ( &prime;) down-sloping towards an edge ( ) thereof and the edge portion ( ) of the outer panel ( ) has an outside rise portion ( ) telescopically fitted with the inside rise portion ( ), a back plane ( &prime;) of the outside rise portion ( ) abutting on the surface plane ( &prime;) of the inside rise portion ( ).

Structure of hemmed together metal plate materials

Temperature in the vicinity of a heated point on a work ( ) surface on a moving locus of flame poured from a torch ( ) is measured, the measured value is inputted into a controlling unit ( ). It is converted into a physical quantity which appeals to the perception of a worker, such as light, sound, or vibration, and outputted to warning means ( and ). The measured value is compared with a predetermined standard temperature range, and as the measured value approaches the upper limit or the lower limit of the standard temperature range, the physical quantity produced as warning signal is stepwise changed. This permits the worker to perceive the change in the measured value, and to easily change the position of the torch or the moving speed thereof so that the temperature at the heated point is maintained within the standard temperature range. Also, recording the measured values of the heating temperatures by connecting a recording unit ( and ) to the controlling unit ( ), can serve to quality control.

Method and apparatus for monitoring work heating temperature in flame hardening

An impact bar having a sectional shape including a cylindrical portion formed of a plate material has a flat rib portion formed by extending both ends of the plate material to an inner side of the cylindrical portion with the leading end of each end being close to or contacting the inner surface of the cylindrical portion. The resulting impact bar provides enhanced strength without an increase in weight.

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Aichi-ken, Japan

Katsuhiko Asai