CN102974646A - Manufacturing process of aluminum alloy water-drop-shaped thin-wall tubular material - Google Patents
Manufacturing process of aluminum alloy water-drop-shaped thin-wall tubular material Download PDFInfo
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- CN102974646A CN102974646A CN2012105588330A CN201210558833A CN102974646A CN 102974646 A CN102974646 A CN 102974646A CN 2012105588330 A CN2012105588330 A CN 2012105588330A CN 201210558833 A CN201210558833 A CN 201210558833A CN 102974646 A CN102974646 A CN 102974646A
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Abstract
The invention provides a manufacturing process of an aluminum alloy water-drop-shaped thin-wall tubular material, comprising the following steps of: 1) extruding: extruding a casting ingot into a circular tube blank; 2) rolling and annealing: carrying out annealing treatment on the circular tube blank; 3) rolling: rolling the circular tube blank and reducing the diameter and the wall thickness of the circular tube blank; 4) reducing the diameter and annealing: carrying out annealing treatment on the circular tube blank with the reduced diameter; 5) stretching: stretching the circular tube blank with the reduced diameter and stretching into a water-drop-shaped tube finished product; 6) quenching: carrying out quenching treatment on the water-drop-shaped tube finished product; and 7) stretching and strengthening: carrying out stretching and strengthening on the water-drop-shaped tube finished product. According to the manufacturing process, the circular tube blank is obtained by extruding the casting ingot; the manufacturing of the water-drop-shaped thin-wall tubular material can be realized through direct molding of a rolling and stretching process of the circular tube blank; the subsequent machining is reduced and the metal utilization rate is improved; and the machining difficulty is reduced and the machining time is shortened, so that the production efficiency is improved.
Description
Technical field
The present invention relates to aluminium alloy pipe manufacturing technology field, more particularly, relate to a kind of production technology of aluminium alloy water-drop-shaped thin-wall pipes.
Background technology
The similar water droplet of water-drop-shaped finger-type shape is by the irregular curve figure of a series of coordinate points connections.Light-wall pipe refers to the wall thickness≤5mm of tubing, by aluminum alloy seamless tube rolling or that drawing process obtains.As shown in Figure 1, this figure is the schematic diagram of the shape of cross section of a kind of water-drop-shaped thin-wall pipes of producing of the production technology of the aluminium alloy water-drop-shaped thin-wall pipes that provides of the embodiment of the invention.Aluminium alloy water-drop-shaped thin-wall pipes is mainly used in makes the seaplane wing.
At present, aluminium alloy water-drop-shaped tubing can only obtain by the machined mode of solid bar, because the water-drop-shaped tube wall thickness is thinner, the user uses scale long, so can only carry out machining at the large-sized numerical control center, the metal cutting amount is larger, using rate of metal is lower, and increased mechanical processing difficulty, process time is longer.And above-mentioned processing mode can only be produced the larger water-drop-shaped tubing of wall thickness at present.
In sum, how a kind of production technology of aluminium alloy water-drop-shaped thin-wall pipes is provided, to realize the manufacturing to aluminium alloy water-drop-shaped thin-wall pipes, reduce follow-up machining, improve using rate of metal, reducing simultaneously mechanical processing difficulty, shorten process time, is the technical problem that present those skilled in the art need to be resolved hurrily.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of production technology of aluminium alloy water-drop-shaped thin-wall pipes, to realize the manufacturing to aluminium alloy water-drop-shaped thin-wall pipes, reduce follow-up machining, improve using rate of metal, reduce simultaneously mechanical processing difficulty, shorten process time.
In order to achieve the above object, the invention provides following technical scheme:
A kind of production technology of aluminium alloy water-drop-shaped thin-wall pipes may further comprise the steps:
1) extruding: ingot casting is squeezed into the pipe woolen cloth;
2) mill-annealed: described pipe woolen cloth is carried out annealing in process;
3) rolling: as described pipe woolen cloth to be rolled, to reduce diameter and the wall thickness of described pipe woolen cloth;
4) tube reducing annealing: the described pipe woolen cloth behind the tube reducing is carried out annealing in process;
5) stretch: the described pipe woolen cloth behind the tube reducing is stretched, it is drawn into water-drop-shaped pipe finished product;
6) quench: described water-drop-shaped pipe finished product is carried out Quenching Treatment;
7) tension straingtening: described water-drop-shaped pipe finished product is carried out tension straingtening.
Preferably, in the production technology of above-mentioned aluminium alloy water-drop-shaped thin-wall pipes, the external diameter of the described pipe woolen cloth in the described step 1)
Wherein: L is the external diameter girth of described water-drop-shaped pipe finished product.
Preferably, in the production technology of above-mentioned aluminium alloy water-drop-shaped thin-wall pipes, the span of described K is 1.02-1.04.
Preferably, in the production technology of above-mentioned aluminium alloy water-drop-shaped thin-wall pipes, described step 5) comprises:
Step 51) transition stretches: utilize 30T to draw the described pipe woolen cloth after drawbench adopts form drawing technique that coreless head stretches with tube reducing by oval transition stretching die to be drawn into oval pipe;
Step 52) form drawing: utilize 30T to draw drawbench by the form drawing technique that whole footpath mould adopts coreless head to stretch described oval pipe to be drawn into water-drop-shaped pipe finished product.
Preferably, in the production technology of above-mentioned aluminium alloy water-drop-shaped thin-wall pipes, described step 7) is finished in two hours after described step 6) is carried out.
Preferably, in the production technology of above-mentioned aluminium alloy water-drop-shaped thin-wall pipes, the tension straingtening of described step 7) is 2%-3% to the extensibility of described water-drop-shaped pipe finished product.
Preferably, in the production technology of above-mentioned aluminium alloy water-drop-shaped thin-wall pipes, described step 7) is specially:
In the hole of described water-drop-shaped pipe finished product, fill in the aligning core print and by the 40T seven-roll Abramsen machine described water-drop-shaped pipe finished product is carried out tension straingtening.
Preferably, in the production technology of above-mentioned aluminium alloy water-drop-shaped thin-wall pipes, described step 1) is specially:
420 ℃-450 ℃ of ingot casting temperature, 400 ℃-420 ℃ of recipient temperature and extrusion speed are that 1.0mm/s-1.5mm/s is squeezed into described ingot casting the described pipe woolen cloth that is of a size of Φ 103mm * 4.5mm by the 2500T horizontal extruder.
Preferably, in the production technology of above-mentioned aluminium alloy water-drop-shaped thin-wall pipes, described step 2) be specially described pipe woolen cloth is put into box air annealing furnace, be heated to 450 ℃, insulation 3h;
Described step 3) is specially by the LG80 pipe mill described pipe woolen cloth is rolled into Φ 94mm * 2.36mm by Φ 103mm * 4.5mm;
Described step 4) is specially puts into box air annealing furnace with the described pipe woolen cloth behind the tube reducing, is heated to 280 ℃, insulation 2.5h;
Described step 6) is specially puts into the vertical air glowing furnace with described water-drop-shaped pipe finished product, is heated to 497 ℃, insulation 40min.
Preferably, in the production technology of above-mentioned aluminium alloy water-drop-shaped thin-wall pipes, also comprise after the described step 7):
Step 8) is cut into product, sampling;
Step 9) packing, warehouse-in.
Can find out that from above-mentioned technical scheme the production technology of aluminium alloy water-drop-shaped thin-wall pipes provided by the invention may further comprise the steps:
1) extruding: ingot casting is squeezed into the pipe woolen cloth;
2) mill-annealed: described pipe woolen cloth is carried out annealing in process;
3) rolling: as described pipe woolen cloth to be rolled, to reduce diameter and the wall thickness of described pipe woolen cloth;
4) tube reducing annealing: the described pipe woolen cloth behind the tube reducing is carried out annealing in process;
5) stretch: the described pipe woolen cloth behind the tube reducing is stretched, it is drawn into water-drop-shaped pipe finished product;
6) quench: described water-drop-shaped pipe finished product is carried out Quenching Treatment;
7) tension straingtening: described water-drop-shaped pipe finished product is carried out tension straingtening.
In summary, it is woollen that the production technology of aluminium alloy water-drop-shaped thin-wall pipes provided by the invention obtains pipe by the extruding to ingot casting, can realize manufacturing to aluminium alloy water-drop-shaped thin-wall pipes by the rolling, drawing technique direct forming to the pipe woolen cloth, reduced follow-up machining, the metal cutting amount is less, has improved using rate of metal, has reduced simultaneously mechanical processing difficulty, shorten process time, thereby improved production efficiency.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of the shape of cross section of a kind of water-drop-shaped thin-wall pipes of producing of the production technology of the aluminium alloy water-drop-shaped thin-wall pipes that provides of the embodiment of the invention;
Fig. 2 is the schematic flow sheet of the production technology of the aluminium alloy water-drop-shaped thin-wall pipes that provides of the embodiment of the invention.
The specific embodiment
The embodiment of the invention provides a kind of production technology of aluminium alloy water-drop-shaped thin-wall pipes, realize the manufacturing to aluminium alloy water-drop-shaped thin-wall pipes, reduced follow-up machining, improved using rate of metal, reduce simultaneously mechanical processing difficulty, shortened process time.
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Please refer to accompanying drawing 2, the production technology of the aluminium alloy water-drop-shaped thin-wall pipes that the embodiment of the invention provides is 2024T4 mainly for the alloy state that needs among Fig. 1 to produce, and tube wall thickness is 2.41mm, order length is the aluminium alloy water-drop-shaped thin-wall pipes of 3660mm, may further comprise the steps:
S1 extruding: ingot casting is squeezed into the pipe woolen cloth:
In conjunction with the sectional view of water-drop-shaped tubing, we can draw, and water-drop-shaped pipe external diameter perimeter L is 278.17mm, and wall thickness is 2.41mm, basal area 653mm
2, the long 119.89mm of major axis A, minor axis B is long to be 50.8mm; This tubing is the common wall thickness special pipe that waits.
Preferably, be convenient to make the water-drop-shaped pipe that needs acquisition for the size that makes the pipe woolen cloth, the pipe of the embodiment of the invention is woollen to be determined by following formula:
The girth S of pipe woolen cloth before being shaped
0=KL, the external diameter of pipe woolen cloth before then being shaped
Wherein, K is coefficient, and when the value of K was too small, the bight of the tubing of shaping was with serious being not fully filled, and when the K value was excessive, the tube surfaces of shaping was recessed serious.In the present embodiment, the span of K is 1.02-1.04, preferably is that 1.03, K can also be the arbitrary numerical value in the 1.02-1.04 scope with the K value.Certainly, K also can be other numerical value, and its size is relevant with alloy property and trimmed size.Generally speaking, wall thickness and the large tubing of specification removes the limit, and large to wall thickness, the tubing that specification is little, but capping then.
So, the external diameter of pipe woolen cloth before the shaping
In conjunction with existing design of section of rolling mill (103 * 94), manage woollen external diameter and be decided to be: Φ 103mm
Step S1 is specially:
By the 2500T horizontal extruder 420 ℃-450 ℃ of ingot casting temperature, 400 ℃-420 ℃ of recipient temperature and extrusion speed are that 1.0mm/s-1.5mm/s is squeezed into ingot casting the pipe woolen cloth that is of a size of Φ 103mm * 4.5mm, this moment, extrusion coefficient was 22.3, and extrusion length is 9.2mm.
S2: mill-annealed: the pipe woolen cloth is carried out annealing in process:
The pipe woolen cloth is put into box air annealing furnace, be heated to 450 ℃, insulation 3h; According to the size of different alloy properties and pipe woolen cloth, above-mentioned heating-up temperature and temperature retention time should be revised accordingly; Can adopt other annealing device to anneal, the embodiment of the invention is not done restriction to this yet.
S3: rolling: the pipe woolen cloth is rolled, reduces diameter and the wall thickness of pipe woolen cloth:
By the LG80 pipe mill pipe woolen cloth is rolled into Φ 94mm * 2.36mm by Φ 103mm * 4.5mm.
S4: tube reducing annealing: the pipe woolen cloth behind the tube reducing is carried out annealing in process:
Pipe woolen cloth behind the tube reducing is put into box air annealing furnace, be heated to 280 ℃, insulation 2.5h; According to the size of different alloy properties and pipe woolen cloth, above-mentioned heating-up temperature and temperature retention time should be revised accordingly; Can adopt other annealing device to anneal, the embodiment of the invention is not done restriction to this yet.
S5: stretch: the pipe woolen cloth behind the tube reducing is stretched, it is drawn into water-drop-shaped pipe finished product:
The water-drop-shaped pipe finished product that is shaped for needs when ratio of long axis to short axis A/B＜2, can directly be drawn into the water-drop-shaped pipe with the pipe woolen cloth by once-forming; When ratio of long axis to short axis A/B 〉=2, because when circle was drawn into water-drop-shaped, metal flow was extremely inhomogeneous, distortion is fierce, for guarantee tube surfaces smooth must through the one-off drawing transition, be the water-drop-shaped pipe with the forming tubular product after the transition again.
In the present embodiment, major and minor axis A/B=119.89/50.8=2.36〉2, so need to carry out the one-off drawing transition, specifically stretching by following dual mode obtains the water-drop-shaped pipe;
A kind of is the mode that present embodiment preferably adopts, and specifically comprises:
Step S51: transition stretches:
Utilize 30T to draw the pipe woolen cloth after drawbench adopts form drawing technique that coreless head stretches with tube reducing by oval transition stretching die to be drawn into oval pipe; Above-mentioned oval transition stretching die major axis is 120mm, and minor axis is 60mm;
Step S52: form drawing:
Utilize 30T to draw drawbench by the form drawing technique that whole footpath mould adopts coreless head to stretch oval pipe to be drawn into water-drop-shaped pipe finished product; The major axis of above-mentioned whole footpath mould is 120.74mm, and minor axis is 52.34mm;
Wall thickness is thinner behind the tube rolling, and the form drawing technique that present embodiment preferentially adopts coreless head to stretch can reduce the fracture that tubing causes in drawing process.
Because tubing is when stretching, the long axis direction metal flow gets faster, metal filled is more abundant, so design the major axis dimension of the die cavity of mould more approaching with the major axis dimension of water-drop-shaped pipe, design the minor axis dimension of the die cavity of mould to such an extent that differ more with the minor axis dimension of water-drop-shaped pipe, be convenient on the short-axis direction filling of metal in the size that the minor axis at the water-drop-shaped pipe needs, reduced the scale error of the water-drop-shaped pipe finished product of acquisition, more reliable by above-mentioned technique stretch forming, and practicality is good.
Another kind is the pipe woolen cloth to be carried out transition by droplet-shaped transition stretching die stretch, and stretching by whole footpath mould forms water-drop-shaped pipe finished product again, and wherein, the major axis of water-drop-shaped transition stretching die is 121.54mm, and minor axis is 52.8mm.
S6: quench: water-drop-shaped pipe finished product is carried out Quenching Treatment:
In order to reach the alloy state requirement of 2024T4, water-drop-shaped pipe finished product need to be put into the vertical air glowing furnace, be heated to 497 ℃, be incubated 40min, improved intensity and the characteristic of aluminium alloy water-drop-shaped pipe.According to the size of different alloy properties and water-drop-shaped pipe finished product, above-mentioned heating-up temperature and temperature retention time should be revised accordingly; Can adopt other quenching unit to quench, the embodiment of the invention is not done restriction to this yet.
S7: tension straingtening: water-drop-shaped pipe finished product is carried out tension straingtening:
Tubing after quenching is come out of the stove produces more serious buckling deformation, must align, because the tubing profile is similar to be water-drop-shaped, can't carry out roller rectifys, can only carry out tension straingtening, preferably by in the hole of water-drop-shaped pipe finished product, filling in the aligning core print and by the 40T seven-roll Abramsen machine water-drop-shaped pipe finished product being carried out tension straingtening; The aligning core print has reduced the length of tubing head flattening deformation, is convenient to the aligning of tubing.
The tension straingtening technique of the embodiment of the invention is preferably 2%-3% to the extensibility of water-drop-shaped pipe finished product, has both satisfied the flexibility requirement of water-drop-shaped tubing, can guarantee that again the size of water-drop-shaped tubing satisfies tolerance.
It will be appreciated by persons skilled in the art that the production technology that the embodiment of the invention provides can also produce the aluminium alloy water-drop-shaped thin-wall pipes of other sizes, only need to make amendment to the relevant parameter in the above-mentioned steps and size gets final product.
In summary, it is woollen that the production technology of the aluminium alloy water-drop-shaped thin-wall pipes that the embodiment of the invention provides obtains pipe by the extruding to ingot casting, can realize manufacturing to aluminium alloy water-drop-shaped thin-wall pipes by the rolling, drawing technique direct forming to the pipe woolen cloth, reduced follow-up machining, the metal cutting amount is less, has improved using rate of metal, has reduced simultaneously mechanical processing difficulty, shorten process time, thereby improved production efficiency.
Preferably, in the production technology of the aluminium alloy water-drop-shaped thin-wall pipes that above-described embodiment provides, step S7 finishes in two hours after step S6 carries out.The tubing that stretches after quenching should be aligned complete in its plasticity as far as possible in the best time, in case age-hardening affects leveling effect, according to knowhow, 2024 alloy pipes must have been aligned in quenching in-draw in rear 2 hours, reduce tubing and drawn generation not straight or that break, improved the qualification rate of product.
For the ease of the monitoring to product, in the production technology of the aluminium alloy water-drop-shaped thin-wall pipes that above-described embodiment provides, also comprise after the step S7: step S8: be cut into product, sampling:
As requested water-drop-shaped pipe finished product is cut into different length to satisfy different application scenarios, and the water-drop-shaped pipe finished product of producing taken a sample, detect its qualification rate and also per sample technological parameter is revised accordingly, so that obtain higher-quality product;
Step S9: packing, warehouse-in:
Water-drop-shaped pipe finished product is packed, put in storage, so, water-drop-shaped pipe finished product is protected, it causes unexpected damage and distortion to have avoided outer bound pair.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. the production technology of an aluminium alloy water-drop-shaped thin-wall pipes is characterized in that, may further comprise the steps:
1) extruding: ingot casting is squeezed into the pipe woolen cloth;
2) mill-annealed: described pipe woolen cloth is carried out annealing in process;
3) rolling: as described pipe woolen cloth to be rolled, to reduce diameter and the wall thickness of described pipe woolen cloth;
4) tube reducing annealing: the described pipe woolen cloth behind the tube reducing is carried out annealing in process;
5) stretch: the described pipe woolen cloth behind the tube reducing is stretched, it is drawn into water-drop-shaped pipe finished product;
6) quench: described water-drop-shaped pipe finished product is carried out Quenching Treatment;
7) tension straingtening: described water-drop-shaped pipe finished product is carried out tension straingtening.
2. the production technology of aluminium alloy water-drop-shaped thin-wall pipes according to claim 1 is characterized in that, the external diameter of the described pipe woolen cloth in the described step 1)
Wherein: L is the external diameter girth of described water-drop-shaped pipe finished product.
3. the production technology of aluminium alloy water-drop-shaped thin-wall pipes according to claim 2 is characterized in that, the span of described K is 1.02-1.04.
4. the production technology of aluminium alloy water-drop-shaped thin-wall pipes according to claim 2 is characterized in that, described step 5) comprises:
Step 51) transition stretches: utilize 30T to draw the described pipe woolen cloth after drawbench adopts form drawing technique that coreless head stretches with tube reducing by oval transition stretching die to be drawn into oval pipe;
Step 52) form drawing: utilize 30T to draw drawbench by the form drawing technique that whole footpath mould adopts coreless head to stretch described oval pipe to be drawn into water-drop-shaped pipe finished product.
5. the production technology of aluminium alloy water-drop-shaped thin-wall pipes according to claim 4 is characterized in that, described step 7) is finished in two hours after described step 6) is carried out.
6. the production technology of aluminium alloy water-drop-shaped thin-wall pipes according to claim 5 is characterized in that, the tension straingtening of described step 7) is 2%-3% to the extensibility of described water-drop-shaped pipe finished product.
7. the production technology of aluminium alloy water-drop-shaped thin-wall pipes according to claim 6 is characterized in that, described step 7) is specially:
In the hole of described water-drop-shaped pipe finished product, fill in the aligning core print and by the 40T seven-roll Abramsen machine described water-drop-shaped pipe finished product is carried out tension straingtening.
8. the production technology of aluminium alloy water-drop-shaped thin-wall pipes according to claim 2 is characterized in that, described step 1) is specially:
420 ℃-450 ℃ of ingot casting temperature, 400 ℃-420 ℃ of recipient temperature and extrusion speed are that 1.0mm/s-1.5mm/s is squeezed into described ingot casting the described pipe woolen cloth that is of a size of Φ 103mm * 4.5mm by the 2500T horizontal extruder.
9. the production technology of aluminium alloy water-drop-shaped thin-wall pipes according to claim 8 is characterized in that, described step 2) be specially described pipe woolen cloth is put into box air annealing furnace, be heated to 450 ℃, insulation 3h;
Described step 3) is specially by the LG80 pipe mill described pipe woolen cloth is rolled into Φ 94mm * 2.36mm by Φ 103mm * 4.5mm;
Described step 4) is specially puts into box air annealing furnace with the described pipe woolen cloth behind the tube reducing, is heated to 280 ℃, insulation 2.5h;
Described step 6) is specially puts into the vertical air glowing furnace with described water-drop-shaped pipe finished product, is heated to 497 ℃, insulation 40min.
10. the production technology of the described aluminium alloy water-drop-shaped of any one thin-wall pipes is characterized in that according to claim 1-9, also comprises after the described step 7):
Step 8) is cut into product, sampling;
Step 9) packing, warehouse-in.
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