A kind of copper alloy wire base up-drawing method
Technical field
The invention belongs to the copper alloy manufacture field, specially refer to a kind of production technology of copper alloy wire base.
Background technology
Comprise that electric wire has following several kinds of production technologies with the copper wire of copper cash; As continuous casting and rolling method, extrusion, horizontal casting method, on draw the method for forming, the continuous casting and rolling method for making need adopt main equipment, joins melt in furnace to copper and various other element such as tin, phosphorus, silicon, manganese etc. according to proportioning before this; Ingot casting moulding then; Be to adopt main equipment to push again, stretch then, clean at last to form finished product.As follows:
Batching → fusing → intensification → continuous casting and rolling → wire drawing → cleaning
The technological process of extrusion is:
Batching → fusing → intensification → ingot casting → extruding → wire drawing → cleaning
The technological process of horizontal casting method is:
Batching → fusing → intensification → horizontal casting → wire drawing → cleaning
On draw the method for forming technological process be:
Batching → fusing → intensification → on draw moulding → wire drawing → cleaning
The advantage of continuous casting and rolling method is the line base dense structure that makes, evenly, and production efficiency is high, shortcoming be only be suitable for large-scale production, investment is big, risk is high, and the line base oxygen content of producing is high slightly, and impurity is arranged.
The advantage that extrusion is produced is in being suitable for, large-scale production scale, and the line base is organized high compaction, and shortcoming is that production efficiency is low, and joint is insecure, and impurity is arranged, not suitable for producing wire rod on a small scale.
The advantage that the horizontal casting method is produced is to be suitable for various production scales, and efficient is general, and shortcoming is that line base surface is prone to oxidation, is organized as cast sturcture, has loose.
And draw the advantage that the method for forming produces on traditional is to be suitable for various production scales, and the product oxygen content is low, and impurity is less, and steady quality can be produced trickle or ultra-fine microfilament; Shortcoming is that production efficiency is general, and the line base is a cast sturcture, and is loose, and the uneven components phenomenon is arranged.
Summary of the invention
The technical problem that the present invention will solve provide a kind of small investment, technology simple, can produce the copper alloy wire base up-drawing method of trickle wire rod and energy-conserving and environment-protective.
The technical scheme that the present invention taked is a kind of copper alloy wire base up-drawing method; The melting, wire drawing and the cleaning that comprise batching, raw material form finished product; It also comprises the steps between the melting of raw material and drawing step, and crystallizer is put into the copper alloy liquid after the melting, and said crystallizer comprises overcoat, on the coat water inlet and delivery port are set, be sleeved on the copper sheathing in the overcoat and be sleeved on the graphite mo(u)ld in the copper sheathing; Said graphite mo(u)ld is made up of truncated cone bottom, cylindrical central part and rounding taper type top; Water inlet to overcoat injects cold water, and cold water is come out from the delivery port of overcoat, and the copper alloy liquid of fusing gets into truncated cone bottom, cylindrical central part and the rounding taper type top of graphite mo(u)ld successively under the effect of air pressure; Copper alloy liquid is cooling successively in this process; Form the copper alloy wire base, under the effect of draw-gear, said copper alloy wire base gets into next step drawing step.
Among the present invention, the temperature of said copper alloy liquid is set to its melting temperature and adds 50~100 ℃.The hydraulic pressure of cold water is 2~4MPa; The hauling speed of said draw-gear is 500~1500mm/min; Described mode of traction suspends for upwards drawing the back, counter downwards again pushing away, and upwards traction is carried out so repeatedly again.
Copper alloy of the present invention is the copper alloy of copper-zinc-manganese alloy system.
The invention has the beneficial effects as follows that copper alloy liquid is directly formed to the copper alloy wire base, be suitable for different scales enterprise, its step is with to draw the method for forming traditionally identical, and difference is drawn this step of moulding last.
In the present invention, the copper alloy that configures is warmed up on this alloy melting point 50~100 ℃ behind furnace melting, after the alloy homogenising, draw moulding on can beginning; The graphite mo(u)ld device that overcoat is housed is vertically put into copper alloy liquid, and making the bottom is 80~100cm apart from metal bath surface, at this moment; Copper alloy liquid gets into the truncated cone bottom of graphite mo(u)ld under atmospheric effect, because the graphite mo(u)ld wall has cold water to flow, make the inside and outside wall formation temperature gradient of graphite mo(u)ld and the top and the bottom formation temperature gradient of graphite mo(u)ld; Copper alloy liquid is met the quench solidification moulding; Under the traction of draw-gear, mode of traction is traction-time-out-counter pushing away-draw, and the copper alloy wire base of moulding moves up like this; Following copper alloy liquid moves up under the atmospheric pressure effect; Meet the cold solid that becomes, this process by liquid-solid is successive, has therefore formed the bar of endless.In the initial period of copper alloy wire blank molding, in graphite mo(u)ld, insert a copper alloy wire base earlier, utilize this root copper alloy wire base to pull out crystallizer to the copper alloy wire base of meeting cold forming, realize drawing step.
The copper alloy wire base constant product quality that the present invention produces, free from admixture, surperficial non-oxidation; The interior tissue oxygen content is low, can carry out continuous drawing, produces trickle wire rod; Be particularly suitable for the production of medium and small copper alloy wire factory, reduced production cost, reduced the scale of investment of fixed capital; Having reduced risk, is the reliable approach of medium-sized and small enterprises' development.
Description of drawings
Fig. 1 is the structure of mould sketch map that has smelting furnace of the present invention;
Fig. 2 is a structure of mould sketch map of the present invention;
Fig. 3 is the structural representation of graphite mo(u)ld of the present invention.
In the drawings, 1 smelting furnace, 2 copper alloy liquid, 3 copper sheathings, 4 cold water, 5 graphite mo(u)lds, 6 delivery ports, 7 copper alloy wire bases, 8 water inlets, 9 overcoats, 10 rounding taper type tops, 11 cylindrical central part, 12 truncated cone bottoms, 13 draw-gears.
The specific embodiment
The present invention includes batching, raw material melting, on draw moulding, wire drawing and cleaning forms finished product; Its concrete steps are; Earlier copper and materials such as tin, phosphorus, silicon, manganese are joined in the smelting furnace 1 according to proportioning, materials such as tin, phosphorus, silicon, manganese reach as high as 10% of total raw material, after material melts; Crystallizer is put into the copper alloy liquid 2 after the fusing, and the temperature of copper alloy liquid 2 is that the melting temperatures of copper alloy liquid 2 itself add 50 ℃.Shown in accompanying drawing 1-3; Described crystallizer comprises overcoat 9, be arranged on water inlet 8 and delivery port 6 on the overcoat 9, be sleeved on the copper sheathing 3 in the overcoat 9 and be sleeved on the graphite mo(u)ld 5 in the copper sheathing 3; Said graphite mo(u)ld 5 is made up of truncated cone bottom 12, cylindrical central part 11 and rounding taper type top 10; Water inlet 8 to overcoat 9 injects cold water 4, and cold water 4 is come out from the delivery port 6 of overcoat 9, and wherein the hydraulic pressure of cold water is 3MPa.The copper alloy liquid 2 of fusing gets into truncated cone bottom 12, cylindrical central part 11 and the rounding taper type top 10 of graphite mo(u)ld 5 successively under the effect of air pressure; Copper alloy liquid 2 is cooling successively in this process; Form copper alloy wire base 7, under the effect of draw-gear 13, copper alloy wire base 7 moves up; Translational speed is 1000mm/min, and mode of traction is:
Traction → time-out → counter pushing away → draw
After having drawn, copper alloy wire base 7 solidifies, and copper alloy wire base 7 gets into next step drawing step.
On initial, draw in the forming step; In graphite mo(u)ld 5, put into the copper alloy wire base in advance; Copper alloy liquid 2 is when running into the copper alloy wire base and then cool off, and copper alloy liquid 2 becomes solid-state and closely is connected with the copper alloy wire base, thereby the wire drawing that gets into next step forms the finished product step with cleaning.This part technology belongs to prior art, repeats no more.