METHOD AND APPARATUS FOR COILING ROD Russian patent published in 2002 - IPC

FIELD: rolled stock production, namely processes and equipment for forming coils of steel rods or non-ferrous metal rods. SUBSTANCE: method comprises steps of continuously feeding rod through guide; forming variable-diameter turns by changing rotation speed of rod and laying turns by horizontal layers along height of coil. Novelty is feed of rod at speed (35-300) m/s. Formation of variable-diameter turns is realized by action of dynamic efforts due to deflection of rod at guide outlet by inclination angle (15-80) degrees relative to rotation axis and then feeding it along curvilinear concave path at providing rotation angle (80-90) degrees relative to rotation axis of guide while changing rotation speed of guide at taking into account given relation where ω - angular velocity of guide; σ_T - rod material yield strength. Formed variable-diameter turns in the form of flat helix are fed by means of conveyor for laying them in well. Laid coil is tied. EFFECT: possibility for forming compact coil of high-quality rod with enhanced efficiency. 26 cl, 18 dwg