APPARATUS FOR WELDING BETWEEN CONTINUSLY STRIGHT STEEL BARS COIL TYPE REBAR USING STEEL BAR FEED LENGTH BUFFER APPARATUS FOR MANUFACTURING COIL TYPE REBAR USING STEEL BAR FEED LENGTH BUFFER AND APPARATUS FOR MANUFACTURING REBAR CAGE USING STEEL BAR FEED LENGTH BUFFER

摘要

The present invention relates to a welding method and a welding apparatus between continuously supplied straight reinforcing bars using a reinforcing bar transport length buffer, a manufacturing method and a manufacturing apparatus of a coil reinforcing bar using a reinforcing bar transport length buffer, and a manufacturing method and a manufacturing apparatus of a reinforcing bar cage using a reinforcing bar transport length buffer. The welding method between continuously supplied straight reinforcing bars using a reinforcing bar transport length buffer comprises: a step of continuously supplying a plurality of straight reinforcing bars having a preset length; a step of giving elasticity to a first straight reinforcing bar positioned on a front end, whose one end is not welded to a different straight reinforcing bar, among the supplied straight reinforcing bar to transport the first straight reinforcing bar to a first position and wind the first straight reinforcing bar in a preset direction to adjust a transport length to a front and a rear of a transport direction; a step of adjusting a transport length of the first straight reinforcing bar and a second straight reinforcing bar positioned on a rear end of the first straight reinforcing bar to allow a gap between one end of the transported first straight reinforcing bar and one end of the second straight reinforcing bar to correspond to a preset welding gap; a step of clamping one end of the first straight reinforcing bar whose transport length is adjusted and one end of the second straight reinforcing bar; and a step of welding the clamped one end of the first straight reinforcing bar and the one end of the second straight reinforcing bar to complete manufacture of an extension reinforcing bar whose length is extended.