CN101518792B - Method for precisely forming copper-nickel alloy flange pipes - Google Patents
Method for precisely forming copper-nickel alloy flange pipes Download PDFInfo
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- CN101518792B CN101518792B CN2008100078458A CN200810007845A CN101518792B CN 101518792 B CN101518792 B CN 101518792B CN 2008100078458 A CN2008100078458 A CN 2008100078458A CN 200810007845 A CN200810007845 A CN 200810007845A CN 101518792 B CN101518792 B CN 101518792B
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Abstract
The invention provides a method for precisely forming copper-nickel alloy flange pipes, comprising the following steps of blanking, heating, forming and machining. Firstly, a tube blank 5 is cut on a The invention provides a method for precisely forming copper-nickel alloy flange pipes, comprising the following steps of blanking, heating, forming and machining. Firstly, a tube blank 5 is cut on aslower die; the upper die moves downwards and extrudes the tube blank directly so as to be formed; subsequently, the upper die moves upwards and is disconnected with the tube blank; and the formed the lower die; the upper die moves downwards and extrudes the tube blank directly so as to be formed; subsequently, the upper die moves upwards and is disconnected with the tube blank; and the formed tube blank is processed as a qualified copper-nickel alloy flange pipe 18 according to technical requirements and surface roughness. The utilization ratio of the tube blank is improved by 10% and thetube blank is processed as a qualified copper-nickel alloy flange pipe 18 according to technical requirements and surface roughness. The utilization ratio of the tube blank is improved by 10% and theenergy consumption is reduced. energy consumption is reduced.awing machine and then arranged in a heater 3; the power of an induction coil 4 is adjusted between 20KW to 100KW by a power supply 1; and the tube blank 5 is pushed into a sensor with the frequencysawing machine and then arranged in a heater 3; the power of an induction coil 4 is adjusted between 20KW to 100KW by a power supply 1; and the tube blank 5 is pushed into a sensor with the frequencyof 1-2 blanks per minute and heated to the temperature of 900-980 DEG C for 0.5-1 minute. An upper die 7 is fixedly arranged at the lower end of a presser bar 6 of a special oil hydraulic press; a locof 1-2 blanks per minute and heated to the temperature of 900-980 DEG C for 0.5-1 minute. An upper die 7 is fixedly arranged at the lower end of a presser bar 6 of a special oil hydraulic press; a locating ring 11 is arranged on a base 14; a lower die 17 and a core bar 15 are loaded firstly; an external die 8 is positioned; a pressing ring 10 and a nut 9 are fixed; the bottom surfaces of the lowerating ring 11 is arranged on a base 14; a lower die 17 and a core bar 15 are loaded firstly; an external die 8 is positioned; a pressing ring 10 and a nut 9 are fixed; the bottom surfaces of the lower die, the external die and the core bar are closely leaned against the upper end of the base and are connected with the locating ring by a T-shaped block 13 and a bolt 12; the tube blank is sleeved ondie, the external die and the core bar are closely leaned against the upper end of the base and are connected with the locating ring by a T-shaped block 13 and a bolt 12; the tube blank is sleeved onthe
Description
Technical field
The invention belongs to the method for metal working technical field, particularly a kind of method for precisely forming copper-nickel alloy flange pipes.
Background technology
Corronil tubing and pipe fittings have superior corrosion resistance energy, anti-sea marine organism pollution and other combination property, be to substitute the ideal material that red copper, stainless steel etc. are used in briny environment, at home and abroad adopted in a large number in shipbuilding industry and the ocean engineering industry, its flange is occupied very big proportion in the corronil pipe fitting.
At present, internal copper alloy pipe fitting manufacturer limits because of being subjected to equipment and cost, and the flange product adopts pressure casting method production more, and production technology is relatively backward, unstable product quality.And my institute corronil flange product adopts hot extrusion molding technology, uses electric furnace with blank heating to 920 ℃～1050 ℃ before moulding, uses particular manufacturing craft extrusion modling on hydraulic press then.Because the electric furnace firing rate is slow, blank need heat in electric furnace about three hours, caused the blank oxidation serious, the nearly 1mm of scale thickness.When compression molding subsequently, for fear of defectives such as being mingled with of causing by oxide skin, need to increase the allowance of blank, allowance is about monolateral 3mm.
Because due to the design feature of corronil flange and the special production technology, spillage of material is very big in process of production to make it, utilization rate of raw materials is lower, thereby causes production cost higher.
Summary of the invention
For addressing the above problem, the invention provides a kind of method for precisely forming copper-nickel alloy flange pipes, change existing simple electric furnace mode of heating, the heating of employing intermediate frequency furnace, shorten heat time heating time, reduce scale thickness, redesign mould simultaneously, control allowance, the utilization rate of raw materials of corronil flange is improved more than 10% on existing basis, and improve corronil flange production efficiency of products greatly, reduce energy consumption, the utilization rate of raw materials that has better solved the corronil flange is low, the problem that production efficiency is low plays facilitation to the further raising of shipbuilding industry and ocean engineering industry correlation technique level.
For achieving the above object, the present invention adopts following technical scheme:
Described method for precisely forming copper-nickel alloy flange pipes is through blanking → heating → moulding → four operations of machined, and each operation division is as follows:
I, blanking
With required specification corronil thick-walled pipe material on request length on sawing machine, be cut into pipe, the corresponding certain size of every kind of specification is as the pipe of moulding copper-nickel alloy flange pipes;
II, heating
The pipe that sawing machine is good down heats with medium frequency induction heater, medium frequency induction heater is adjusted at 20～100KW by power supply with induction coil power, pipe supports continuous putting into from the pusher of inductor, push intermediate frequency inductor by pusher by 1～2/minute pusher frequency and be heated to 900～980 ℃, 0.5～1 minute heat time heating time, the pipe that heats can be released inductor continuously;
III, moulding
Patrix is fixed on the depression bar lower end of special oil press, on special oil press base locating ring is installed, pack into earlier in locating ring counterdie and core bar are located counterdie by external mold, external mold is fixed by pressure ring and nut again; Counterdie, external mold, core bar baseplane are close in the base upper end, and base and locating ring connect it by T shape piece and bolt; The pipe that heats is sleeved on the counterdie, the moulding of the descending forward extrusion pipe of patrix, and the up disengaging pipe of patrix then, knock-pin ejects mould together with pipe and core bar, takes off the material instrument by special use the moulding pipe is broken away from core bar;
IV, machined
The moulding pipe is carried out machined by specification requirement size and surface roughness, become the copper-nickel alloy flange pipes that satisfies specification requirement.
Because adopt aforesaid technical scheme, the present invention has following superiority:
1, the copper-nickel alloy flange pipes product that adopts technology of the present invention to make has reached the requirement of every technical indicator, and its utilization rate of raw materials has improved more than 10% on existing basis, has reached 55%～65%.
2, from before electric furnace slowly heating foreshortened in about three hours present every 0.5～1 minute, saved a large amount of times to wait, improved production efficiency greatly, reduced energy resource consumption.
Description of drawings
Fig. 1 is a moulding copper-nickel alloy flange pipes schematic diagram;
Fig. 2 is that pipe is at the Medium Frequency Induction Heating Furnace schematic diagram;
Fig. 3 is a pipe forward extrusion shaping schematic view;
Among the above-mentioned figure: the 1-power supply; The 2-pusher; The 3-inductor; The 4-induction coil; The 5-pipe; The 6-depression bar; The 7-patrix; The 8-external mold; The 9-nut; The 10-pressure ring; The 11-locating ring; The 12-bolt; 13-T shape piece; The 14-base; The 15-core bar; The 16-knock-pin; The 17-counterdie; The 18-copper-nickel alloy flange pipes.
The specific embodiment
As shown in Figure 1, 2, 3: method for precisely forming copper-nickel alloy flange pipes of the present invention is through blanking → heating → moulding → four operations of machined, and each operation division is as follows:
I, blanking
With required specification corronil thick-walled pipe material on request length on sawing machine, be cut into pipe 5, the corresponding certain size of every kind of specification is as the pipe 5 of moulding copper-nickel alloy flange pipes;
II, heating
III, moulding
Patrix 7 is fixed on depression bar 6 lower ends of special oil press, locating ring 11 is installed on special oil press base 14, in locating ring 11, pack into earlier counterdie 17 and core bar 15, counterdie 17 is by external mold 8 location, fixing by pressure ring 10 and nut 9 with external mold 8 again; Counterdie 17, external mold 8, core bar 15 baseplanes are close in base 14 upper ends, base 14 and locating ring 11 by T shape piece 13 and bolt 12 with its connection; The pipe 5 that heats is sleeved on the counterdie 17, patrix 7 descending forward extrusion pipe 5 moulding, and patrix 7 up disengaging pipes 5 then, knock-pin 16 ejects mould together with pipe 5 and core bar 15, takes off the material instrument by special use moulding pipe 5 is broken away from core bars 15;
IV, machined
The moulding pipe is carried out machined by specification requirement size and surface roughness, become the copper-nickel alloy flange pipes 18 that satisfies specification requirement.
Embodiment 1: the B10 method for precisely forming copper-nickel alloy flange pipes of making the DN50 specification
On sawing machine, be cut into pipe by DN50 specification requirement length, medium frequency induction heater is adjusted at 30KW by power supply with induction coil power, pusher frequency 1/30 seconds, pipe is put into continuously at the pusher end of intermediate frequency furnace inductor, be heated to 900 ℃～980 ℃ by inductor, release with 1/30 seconds frequencies, the pipe that heats is contained on the 315T hydraulic press counterdie, patrix is fixed on the depression bar lower end of hydraulic press, on the hydraulic press base, locating ring is installed, pack into earlier in locating ring counterdie and core bar are located counterdie by external mold, external mold is fixed by pressure ring and nut again; Counterdie, external mold, core bar baseplane are close in the base upper end, and base and locating ring connect it by T shape piece and bolt; The pipe that heats is sleeved on the counterdie, the moulding of the descending forward extrusion pipe of patrix, and the up disengaging pipe of patrix then, knock-pin ejects mould together with pipe and core bar, takes off the material instrument by special use the moulding pipe is broken away from core bar.The moulding pipe is carried out machined by specification requirement size and surface roughness, become the copper-nickel alloy flange pipes that satisfies specification requirement.Utilize method of the present invention processing DN50 flange single-piece pipe weight from before 0.93KG be kept to present 0.76KG, stock utilization has improved 10.6%, the heating of pipe blank time from before electric furnace slowly heating foreshortened in about three hours present every 0.5 minute.
Embodiment 2: the B10 method for precisely forming copper-nickel alloy flange pipes of making the DN80 specification
On sawing machine, be cut into pipe by DN80 specification requirement length, medium frequency induction heater is adjusted at 40KW by power supply with induction coil power, pusher frequency 1/30 seconds, pipe is put into continuously at the pusher end of intermediate frequency furnace inductor, be heated to 900 ℃～980 ℃ by inductor, release with 1/30 seconds frequencies, the pipe that heats is contained on the 315T hydraulic press counterdie, patrix is fixed on the depression bar lower end of hydraulic press, on the hydraulic press base, locating ring is installed, pack into earlier in locating ring counterdie and core bar are located counterdie by external mold, external mold is fixed by pressure ring and nut again; Counterdie, external mold, core bar baseplane are close in the base upper end, and base and locating ring connect it by T shape piece and bolt; The pipe that heats is sleeved on the counterdie, the moulding of the descending forward extrusion pipe of patrix, and the up disengaging pipe of patrix then, knock-pin ejects mould together with pipe and core bar, takes off the material instrument by special use the moulding pipe is broken away from core bar.The moulding pipe is carried out machined by specification requirement size and surface roughness, become the copper-nickel alloy flange pipes that satisfies specification requirement.Utilize method of the present invention processing DN80 flange single-piece pipe weight from before 1.64KG be kept to present 1.38KG, stock utilization has improved 11.2%, the heating of pipe blank time from before electric furnace slowly heating foreshortened in about three hours present every 0.5 minute.
Embodiment 3: the B10 method for precisely forming copper-nickel alloy flange pipes of making the DN100 specification
On sawing machine, be cut into pipe by DN100 specification requirement length, medium frequency induction heater is adjusted at 50KW by power supply with induction coil power, pusher frequency 1/40 seconds, pipe is put into continuously at the pusher end of intermediate frequency furnace inductor, be heated to 900 ℃～980 ℃ by inductor, release with 1/40 seconds frequencies, the pipe that heats is contained on the 800T hydraulic press counterdie, patrix is fixed on the depression bar lower end of hydraulic press, on the hydraulic press base, locating ring is installed, pack into earlier in locating ring counterdie and core bar are located counterdie by external mold, external mold is fixed by pressure ring and nut again; Counterdie, external mold, core bar baseplane are close in the base upper end, and base and locating ring connect it by T shape piece and bolt; The pipe that heats is sleeved on the counterdie, the moulding of the descending forward extrusion pipe of patrix, and the up disengaging pipe of patrix then, knock-pin ejects mould together with pipe and core bar, takes off the material instrument by special use the moulding pipe is broken away from core bar.The moulding pipe is carried out machined by specification requirement size and surface roughness, become the copper-nickel alloy flange pipes that satisfies specification requirement.Utilize method of the present invention processing DN100 flange single-piece pipe weight from before 2.2KG be kept to present 1.7KG, stock utilization has improved 13.5%, the heating of pipe blank time from electric furnace, slowly heated in the past foreshortened in about three hours present every 40 seconds.
Method of the present invention can be made the B10 copper-nickel alloy flange pipes that maximum specification is DN150.
Claims (1)
1. method for precisely forming copper-nickel alloy flange pipes is characterized in that: this forming method is through blanking → heating → moulding → four operations of machined, and each operation division is as follows:
I, blanking
With required specification corronil thick-walled pipe material on request length on sawing machine, be cut into pipe (5), the corresponding certain size of every kind of specification is as the pipe (5) of moulding copper-nickel alloy flange pipes;
II, heating
The pipe (5) that sawing machine is good down heats with medium frequency induction heater (3), medium frequency induction heater (3) is adjusted at 20～100KW by power supply (1) with induction coil (4) power, pipe (5) supports continuous putting into from the pusher (2) of medium frequency induction heater (3), push medium frequency induction heater (3) by pusher (2) by 1～2/minute pusher frequency and be heated to 900～980 ℃, 0.5～1 minute heat time heating time, the pipe that heats (5) can be released medium frequency induction heater (3) continuously;
III, moulding
Patrix (7) is fixed on depression bar (6) lower end of special oil press, go up installation locating ring (11) at special oil press base (14), in locating ring (11), pack into earlier counterdie (17) and core bar (15), counterdie (17) is by external mold (8) location, fixing by pressure ring (10) and nut (9) with external mold (8) again; Counterdie (17), external mold (8), core bar (15) baseplane are close in base (14) upper end, and base (14) and locating ring (11) pass through T shape piece (13) and bolt (12) with its connection; The pipe that heats (5) is sleeved on the counterdie (17), the descending forward extrusion pipe of patrix (7) (5) moulding, the up disengaging pipe of patrix (7) (5) then, knock-pin (16) ejects mould together with pipe (5) and core bar (15), takes off the material instrument by special use moulding pipe (5) is broken away from core bar (15);
IV, machined
The moulding pipe is carried out machined by specification requirement size and surface roughness, become the copper-nickel alloy flange pipes (18) that satisfies specification requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100078458A CN101518792B (en) | 2008-02-26 | 2008-02-26 | Method for precisely forming copper-nickel alloy flange pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100078458A CN101518792B (en) | 2008-02-26 | 2008-02-26 | Method for precisely forming copper-nickel alloy flange pipes |
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| CN101518792A CN101518792A (en) | 2009-09-02 |
| CN101518792B true CN101518792B (en) | 2010-12-08 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829698A (en) * | 2010-03-30 | 2010-09-15 | 河南科技大学 | Extrusion forming process of thin-wall long pipe-shaped part blank with flange and mould |
| CN102350613B (en) * | 2011-07-20 | 2013-07-10 | 宝鸡市守善管件有限公司 | Method for directly pressing and manufacturing titanium turnup according to lap joint diameter |
| CN102672058A (en) * | 2012-05-08 | 2012-09-19 | 哈尔滨工业大学 | Pipe heat-forming equipment |
| CN102658304A (en) * | 2012-05-14 | 2012-09-12 | 安徽工业大学 | Closed-extrusion and molding method of flange |
| CN103071691A (en) * | 2013-01-29 | 2013-05-01 | 龙西新 | Integrated device of lower punch and discharging mechanism in metal forming equipment |
| CN104139147B (en) * | 2014-07-07 | 2015-12-30 | 贵州航天新力铸锻有限责任公司 | The forging method of T-shaped ring-type forge piece blank reheating in SB564 UNS N06690 alloy large-size |
| CN104759849B (en) * | 2015-03-31 | 2017-11-07 | 芜湖新兴铸管有限责任公司 | Preparation method for the flange part of auto-emission control |
| CN106994470A (en) * | 2017-05-10 | 2017-08-01 | 武汉理工大学 | A kind of the hole double-sided boss Compound Extrusion shaping dies and manufacturing process |
| CN109365598B (en) * | 2018-09-06 | 2020-05-26 | 中国船舶重工集团公司第七二五研究所 | Flanging forming method for copper-nickel alloy flange |
| CN113020527A (en) * | 2021-03-19 | 2021-06-25 | 中国船舶重工集团公司第七二五研究所 | Closed large-size copper-nickel alloy BFe30-1-1 flange forming die and processing method |
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