The invention provides a hard and semi-hard
tin-coated
copper wire manufacturing method. The method comprises the following steps: heavy-duty drawing: using a
copper drawing stock for electrical purposes to make a bare
copper wire; medium drawing: sending the qualified bare
copper wire to a wire release support, enabling the bare
copper wire to be stretched through hole mold drawing, preparing a
copper wire with a required wire
diameter, conducting annealing
softening on the copper wire through a certain annealing
voltage, and enabling the copper wire to be a circular soft copper wire with a required external
diameter; and
tinning: detecting the qualified copper wire and sending the copper wire to a wire feed support, cleaning oil stains, oxides and impurities on the surface of the wire by a
cleaning agent, sending the cleaned copper wire to a
tinning pan for
tinning, scraping superfluous
tin off the tinned wire through a specification hole mold, ensuring that a
surface coating on the copper wire is smooth and even, cleaning the surface of the
tin-coated copper wire after cooling, and making a finished product with a required specification by reeling the wire. The beneficial effects of the method are that tin-coated copper wires manufactured by the method exhibit certain
hardness, meet the
hardness requirement for some special industries, and are convenient to plug, unplug and
rivet.