CN104498847A - Method for controlling deformation of thin-walled aluminum alloy bracket with cavity structure during heat treatment - Google Patents
Method for controlling deformation of thin-walled aluminum alloy bracket with cavity structure during heat treatment Download PDFInfo
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- CN104498847A CN104498847A CN201410725568.XA CN201410725568A CN104498847A CN 104498847 A CN104498847 A CN 104498847A CN 201410725568 A CN201410725568 A CN 201410725568A CN 104498847 A CN104498847 A CN 104498847A
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- workpiece
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- heat treatment
- aluminium alloy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
Abstract
The invention relates to a method for controlling the deformation of a thin-walled aluminum alloy bracket with a cavity structure during heat treatment. The method comprises the following steps: (1) defining the arrangement manner of a workpiece in a heating furnace according to characteristics of a workpiece; (2) heating and carrying out heat preservation; (3) quickly feeding the workpiece into water and quenching; (4) straightening section by section by virtue of an oil hydraulic press; and (5) maintaining the shape with a fixture and naturally aging. The method has the advantages that by combination of heating and carrying out heat preservation, rapid cooling, straightening section by section and maintaining the shape with the fixture, the problem of the deformation of the thin-walled aluminum alloy with the cavity structure is solved. The method belongs to the field of heat treatment of a deformed aluminum alloy and is suitable for thin-walled deformed aluminum alloy parts.
Description
Technical field
The invention belongs to wrought aluminium alloy Field of Heat-treatment, relate to a kind of thin wall type cavity configuration aluminium alloy post method for controlling heat treatment deformation, it is applicable to thin-walled die cavity yielding aluminium alloy class part.
Background technology
Aluminum alloy junction component is because having excellent use properties, and can be shaped complex component, the feature that cost is low, very extensive in field application such as aerospace, boats and ships, track traffics.Along with improving constantly of manufacturing technology index request, the structure formation of product becomes increasingly complex, and adopts traditional thermal treatment process, will produce larger distortion.Thin wall type cavity configuration aluminium alloy post adopts 2A12 wrought aluminium alloy, and as-heat-treated condition is quenching natural aging, and this aluminium alloy is very extensive in field application such as aerospace, track traffic, weaponrys.This support generally adopts the aluminium sheet of thick about 30mm, and by Milling Process forming cavity structure, thinnest part is about 5mm.Due to support each several part became uneven, cutting output is different, and structure is longer, the distortion that the complete rear generation of Milling Process is larger, and deflection is about 10mm.By the method for cold sizing, resilience is comparatively large, cannot meet the requirement of follow-up assembling.
Find that thermal treatment adds the method for school shape by research, effectively can solve the problem of workpiece deformation, do not reduce the mechanical property of workpiece simultaneously.
Summary of the invention
The present invention discloses a kind of thin wall type cavity configuration aluminium alloy post method for controlling heat treatment deformation, be intended to overcome the shortcoming that thin wall type cavity configuration aluminium alloy post Workpiece structure is complicated, mechanical workout deflection is comparatively large, cold sizing cannot meet, effectively can ensure the requirement of follow-up assembling, performance index reach design requirements.
Technical scheme of the present invention is as follows:
A kind of thin wall type cavity configuration aluminium alloy post method for controlling heat treatment deformation, comprises the steps:
The first step, enters stove mode: thin wall type cavity configuration aluminium alloy post workpiece adopts the vertical disposing way of length direction to enter stove;
Second step, heating and thermal insulation: processing parameter is, is heated to 280 ~ 290 DEG C, insulation 20min ~ 30min;
3rd step, cools: to be less than workpiece Putting into water rapidly transfer time of 15s, water temperature is 20 ~ 30 DEG C fast; 5 ~ 10min is stopped in workpiece water;
4th step, segmentation school shape: fast after cooling, first to school, proximal end, one end shape of workpiece length direction, rear to school, workpiece length direction the other end proximal end shape, then to school shape in the middle part of workpiece length direction;
5th step, frock dimension shape: namely the work piece vertically after school shape completes loads frock dimension shape, then natural aging 96 ~ 100 hours.
As preferably, when implementing,
In second step, optimum Heating temperature is 285 DEG C, and optimum soaking time is 25min;
In the third step, optimum water temperature is 25 DEG C, and in optimum water, the residence time is 5min;
In the 4th step, school shape adopts oil press;
In the 4th step, in the shape of segmentation school, determine the point of application of school shape, proximal end, described workpiece length direction one end refers to workpiece length direction 1/4 place, described workpiece length direction the other end proximal end refers to workpiece length direction 3/4 place, refers to workpiece length direction 1/2 place in the middle part of described workpiece length direction;
In the 5th step, workpiece, according to flat support, is fixed with 6 card orchids in workpiece surrounding, is regulated the size of clamping force with the blue bolt of card by described frock; Optimum natural aging 96 hours.
Beneficial effect of the present invention:
1) define heat treated holding temperature and time, can workpiece deformation be reduced and product performance do not reduce; 2) define the time of quenching transfer and the requirement of water temperature, be conducive to the binding site that workpiece reaches superior performance and minimal deformation the best; 3) adopt special tooling dimension shape method, relative to particular manufacturing craft controlling distortion, structure is simple, and easy handling, can reach the object of controlling distortion; 4) by grasping the rule of workpiece deformation, adopting oil press segmentation school shape, accurate school shape can be carried out to workpiece; 5) Stages of Aging whole process keeps the constraint of frock, effectively controls the distortion that complex component Stages of Aging stress relaxation produces.
Effectively can solve the problem of workpiece deformation, experiment shows, deflection can be controlled within 1.5mm, does not reduce the mechanical property of workpiece simultaneously.
Accompanying drawing explanation
Fig. 1, thin wall type cavity configuration aluminium alloy post part sketch
A) be support front view b) be the side-view of support
Fig. 2, oil press school shape sketch
Fig. 3 frock dimension shape timeliness schematic diagram
In figure, mark represents: 1-workpiece, 2-school shape cushion block, 3-oil press, 4-school shape platform, and 5-card is blue
Embodiment
Below, by reference to the accompanying drawings and specific embodiment, invention is further described.
Control for thin-walled inlets structure casting cast aluminium alloy cabin section workpiece deformation, as shown in Figure 1, workpiece material is 2A12, as-heat-treated condition is quenching+natural aging, and workpiece overall length is 1400mm, width 280mm, maximum ga(u)ge 27mm, minimum thickness 10mm.Mechanical workout after strain is about 8mm.
By adopting rapid thermal process school shape controlling distortion amount within 2mm, workpiece performance does not reduce.
Embodiment 1
Embodiment is undertaken by following processing step:
The first step, determines into stove mode: workpiece adopts the vertical disposing way of length direction;
Second step, determines heating and thermal insulation processing parameter: workpiece heat to 280 DEG C, insulation 30min;
3rd step, Putting into water rapidly quenches: be less than 15s workpiece transfer time Putting into water rapidly, water temperature 30 DEG C; 5min is stopped in workpiece water;
4th step, segmentation school shape: as shown in Figure 2, is placed in workpiece 1 on the shape platform of school, divides into school shape cushion block 2, and school shape adopts oil press 3, first to workpiece length direction 1/4 place school shape, rear to workpiece length direction 3/4 place school shape, then to workpiece length direction 1/2 place school shape;
5th step, frock dimension shape: as shown in Figure 3, after school shape completes, work piece vertically immediate shipment frock dimension shape, is fixed on school shape platform 4 by workpiece 1, shares 6 cards blue 5 and is evenly fixed by workpiece, regulate the size of clamping force, then natural aging 96 hours with the blue bolt of card.
Embodiment 2
Embodiment is undertaken by following processing step:
The first step, determines into stove mode: workpiece adopts the vertical disposing way of length direction;
Second step, determines heating and thermal insulation processing parameter: workpiece heat to 290 DEG C, insulation 20min;
3rd step, enters water quenching: be less than 15s workpiece transfer time Putting into water rapidly, water temperature 30 DEG C, stops 10min in workpiece water;
4th step, segmentation school shape: adopt oil press 1 first to workpiece length direction 1/4 place school shape, 2 again to workpiece length direction 3/4 place school shape, finally to workpiece length direction 1/2 place school shape;
5th step, frock dimension shape: school gestalt work piece vertically immediate shipment frock dimension shape, is fixed on school shape platform 2 by workpiece 4, shares 6 cards blue 5 and is evenly fixed by workpiece, regulate the size of clamping force, then natural aging 100 hours with the blue bolt of card.
Embodiment 3
Embodiment is undertaken by following processing step:
The first step, determines into stove mode: workpiece adopts the vertical disposing way of length direction;
Second step, determines heating and thermal insulation processing parameter: workpiece heat to 285 DEG C, insulation 25min;
3rd step, enters water quenching: be less than 15s workpiece transfer time Putting into water rapidly, water temperature 25 DEG C, stops 5min in workpiece water;
4th step, segmentation school shape: adopt oil press 1 first to workpiece length direction 1/4 place school shape, 2 again to workpiece length direction 3/4 place school shape, finally to workpiece length direction 1/2 place school shape;
5th step, frock dimension shape: school gestalt work piece vertically immediate shipment frock dimension shape, is fixed on school shape platform 2 by workpiece 1, shares 6 cards blue 5 and is evenly fixed by workpiece, regulate the size of clamping force, then natural aging 96 hours with the blue bolt of card.
The foregoing is only better possible embodiments of the present invention, not thereby limit to the scope of the claims of the present invention, therefore the equivalence change that every utilization specification sheets of the present invention and accompanying drawing content are done, be all contained in protection scope of the present invention.
Claims (6)
1. a thin wall type cavity configuration aluminium alloy post method for controlling heat treatment deformation, comprises the steps:
The first step, enters stove mode: thin wall type cavity configuration aluminium alloy post workpiece adopts the vertical disposing way of length direction to enter stove;
Second step, heating and thermal insulation: be heated to 280 ~ 290 DEG C, insulation 20min ~ 30min;
3rd step, cools: to be less than workpiece Putting into water rapidly transfer time of 15s, water temperature is 20 ~ 30 DEG C fast; 5 ~ 10min is stopped in workpiece water;
4th step, segmentation school shape: fast after cooling, first to school, proximal end, one end shape of workpiece length direction, rear to school, workpiece length direction the other end proximal end shape, then to school shape in the middle part of workpiece length direction;
5th step, frock dimension shape: namely the work piece vertically after school shape completes loads frock dimension shape, then natural aging 96 ~ 100 hours.
2. thin wall type cavity configuration aluminium alloy post method for controlling heat treatment deformation according to claim 1, is characterized in that, in second step, Heating temperature is 285 DEG C, and soaking time is 25min.
3. a kind of thin wall type cavity configuration aluminium alloy post method for controlling heat treatment deformation according to claim 1, it is characterized in that, in the third step, water temperature is 25 DEG C, and in water, the residence time is 5min.
4. thin wall type cavity configuration aluminium alloy post method for controlling heat treatment deformation according to claim 1, its school shape is characterised in that, in the 4th step, school shape adopts oil press.
5. thin wall type cavity configuration aluminium alloy post method for controlling heat treatment deformation according to claim 1, it is characterized in that, in the 4th step, proximal end, described workpiece length direction one end refers to workpiece length direction 1/4 place, described workpiece length direction the other end proximal end refers to workpiece length direction 3/4 place, refers to workpiece length direction 1/2 place in the middle part of described workpiece length direction.
6. thin wall type cavity configuration aluminium alloy post method for controlling heat treatment deformation according to claim 1, is characterized in that, in the 5th step, is fixed by workpiece, regulate the size of clamping force with the blue bolt of card in workpiece surrounding with 6 card orchids; Natural aging 96 hours.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105506522A (en) * | 2015-12-24 | 2016-04-20 | 西北工业大学 | Correction method for heat treatment deformation of frame-class aluminum alloy casting |
| CN112588878A (en) * | 2020-11-27 | 2021-04-02 | 北京星航机电装备有限公司 | Local shape correcting method for aluminum alloy thin-wall special-shaped part |
| CN114952180A (en) * | 2022-08-01 | 2022-08-30 | 陕西斯瑞新材料股份有限公司 | Method for correcting deformation of thin-wall part after vacuum brazing and application thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105506522A (en) * | 2015-12-24 | 2016-04-20 | 西北工业大学 | Correction method for heat treatment deformation of frame-class aluminum alloy casting |
| CN112588878A (en) * | 2020-11-27 | 2021-04-02 | 北京星航机电装备有限公司 | Local shape correcting method for aluminum alloy thin-wall special-shaped part |
| CN114952180A (en) * | 2022-08-01 | 2022-08-30 | 陕西斯瑞新材料股份有限公司 | Method for correcting deformation of thin-wall part after vacuum brazing and application thereof |
| CN114952180B (en) * | 2022-08-01 | 2022-12-06 | 陕西斯瑞新材料股份有限公司 | Shape correction method for deformation of thin-wall part after vacuum brazing and application thereof |
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