CN103990664A - Method for forming titanium alloy sheet metal part - Google Patents
Method for forming titanium alloy sheet metal part Download PDFInfo
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- CN103990664A CN103990664A CN201410257969.7A CN201410257969A CN103990664A CN 103990664 A CN103990664 A CN 103990664A CN 201410257969 A CN201410257969 A CN 201410257969A CN 103990664 A CN103990664 A CN 103990664A
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Abstract
The invention provides a method for forming a titanium alloy sheet metal part. The method is simple, and effectively achieves heated equipment, devices and high temperature resistant moulds in the titanium alloy sheet metal part heating forming method in the prior art and lubrication and pollution prevention under high temperature, heat preservation and pressure maintaining are mainly carried out on titanium alloy materials for a certain time for forming at the temperature of stress relaxation and the creeping state, and high-quality and high-stability forming can be carried out on the titanium alloy sheet metal part successfully.
Description
Technical field
The present invention relates generally to aero titanium alloy sheet metal part field, is specifically related to a kind of titanium-alloy sheet metal forming and machining method.
Background technology
Titanium Alloy Aircraft sheet metal part at room temperature plasticity is low, belongs to unmanageable structural material, and manufacturability is poor, and resistance of deformation is large, and resilience is large, and heating and temperature control is bad, easily produces hydrogen embrittlement; Residual stress and notch stress are concentrated to sensitivity, and crooking ability is low, and plasticity is low, and percentage elongation is low, and easily unstability, therefore, at room temperature only adapts to the simple titanium-alloy sheet metal of shaping form.And for complex-shaped, it is the difficult problem that those skilled in the art need solution badly that part quality and shape stability are required to the processing of high plate alloy sheet metal part.
Summary of the invention
The problem existing in order to solve prior art, the invention provides a kind of titanium-alloy sheet metal forming and machining method, the method is simple, main when adopting titanium alloy material in stress relaxation and entering at the temperature of creep state, through heat-insulation pressure keeping certain hour, form processing, successfully realize the shaping processing of titanium-alloy sheet metal being carried out to high-quality and high stability.
The technical solution used in the present invention is:
A titanium-alloy sheet metal forming and machining method, comprises the steps:
1) with acetone, clean upper die and lower die and the titanium-alloy sheet metal of shaping dies, graphitization on the upper die and lower die of shaping dies and titanium-alloy sheet metal;
2) open hot former, upper die and lower die are heated to 630-650 degree, titanium-alloy sheet metal is positioned on counterdie to preheating 5-10min at 630-650 ℃ of temperature;
3) after the equalized temperature of titanium-alloy sheet metal and counterdie, carry out upper and lower mould matched moulds, keep temperature 630-650 degree, clamping pressure is controlled at 70-90 ton, pressurize 15-20 minute;
4) open upper die and lower die, take out titanium-alloy sheet metal;
5) remove graphite.
In above-mentioned titanium-alloy sheet metal forming and machining method, after matched moulds, the clearance distance between patrix and counterdie and the thickness of titanium-alloy sheet metal adapt.
Above-mentioned titanium-alloy sheet metal forming and machining method, the both sides, upper end of described patrix, the both sides, lower end of counterdie are equipped with hangs rod,
The periphery of the periphery of patrix upside and counterdie downside is respectively provided with a circle presser feet groove.
Above-mentioned titanium-alloy sheet metal forming and machining method, patrix is Ra1.6 with the roughness of the relative shape face of counterdie.
Above-mentioned titanium-alloy sheet metal forming and machining method, the upper die and lower die material of described shaping dies is Mid-Si Mo Cast Iron.
The present invention has following beneficial effect:
Titanium-alloy sheet metal processing method of the present invention adopts isothermal heating to be shaped and processes, owing to adopting unique isothermal heat form, before pressurization, patrix, part and counterdie are heated to 630-650 ℃, after temperature stabilization balance, exerting pressure, method of operating is simple, when pressurization, can realize material Uniform Flow, is difficult for producing cracking and fold during shaping, after being shaped, titanium-alloy sheet metal is without residual stress, paste tire degree good, do not have the materials such as grain growth to change; After heating, material plasticity improves, and resistance of deformation reduces, little to equipment and mould damage.
Accompanying drawing explanation
Fig. 1 is the shaping dies schematic diagram in titanium-alloy sheet metal forming and machining method of the present invention.
1-patrix wherein, 2-counterdie, 3-titanium-alloy sheet metal, 4-presser feet groove, 5-hangs rod.
The specific embodiment
A titanium-alloy sheet metal forming and machining method, comprises the steps:
1) with acetone, clean upper die and lower die and the titanium-alloy sheet metal of shaping dies, and on upper die and lower die and titanium-alloy sheet metal graphitization;
2) open hot former, upper die and lower die are heated to 630-650 degree, titanium-alloy sheet metal is positioned on counterdie to preheating 5-10min at 630-650 ℃;
4) after the equalized temperature of titanium-alloy sheet metal and counterdie, carry out upper and lower mould matched moulds, keep temperature 630-650 degree, clamping pressure is controlled at 80 tons, and pressurize is after 15 minutes; After matched moulds, the clearance distance between patrix and counterdie and the thickness of titanium-alloy sheet metal adapt;
4) controlled hot forming machine is opened shaping dies, takes out titanium-alloy sheet metal;
5) remove graphite, to the titanium-alloy sheet metal examination of testing.
Shaping dies in a kind of titanium-alloy sheet metal forming and machining method as shown in Figure 1, comprise patrix 1, counterdie 2, titanium-alloy sheet metal 3 is placed between patrix 1 and counterdie 2, after matched moulds, the distance between the relative shape face of patrix 1 and counterdie 2 and the thickness of titanium-alloy sheet metal 3 adapt, the both sides, upper end of patrix 1, the both sides, lower end of counterdie 2 are equipped with hangs rod 5, and the periphery of the periphery of patrix 1 upside and counterdie 2 downsides is respectively provided with a circle presser feet groove 4.Before counterdie 2 and patrix 1 are used, it is matched moulds state, relative position is fixing, what adopt crane gear use counterdie hangs excellent 5, the counterdie of matched moulds state 2 and patrix 1 are moved on the lower table of hot former jointly, and the presser feet groove 4 by counterdie 2 is fixed on counterdie 2 on the lower table of hot former; Open thermoforming machine and make upper table slow decreasing, after thermoforming machine upper table contacts with the upper end face of patrix 1, stop decline, by patrix 1 presser feet groove 4 patrix 1 is fixed on the upper table of hot former.
Preferably, patrix is Ra1.6 with the roughness of the relative shape face of counterdie.This roughness can guarantee the roughness requirement of part forming rear surface; Die forming surface finish difficulty is less demanding, can save the man-hour of polishing; Die surface roughness can reduce after hot forming, and roughness requires too high little to part forming help, does not have how many practical significances.
Preferably, upper die and lower die material is Mid-Si Mo Cast Iron, makes this shaping dies and titanium-alloy sheet metal shrinkage ratio under the condition of high temperature close.
Preferably, in titanium-alloy sheet metal forming and machining method of the present invention, first adopt the cooperation of clapper die spotting press and shaping dies to carry out at normal temperatures and pressures pressure testing to the aluminium sheet with titanium-alloy sheet metal 3 equal thickness.After pressure testing meets the requirements, then on thermoforming machine, use shaping dies to carry out hot forming processing to titanium-alloy sheet metal 3.
Claims (5)
1. a titanium-alloy sheet metal forming and machining method, is characterized in that, comprises the steps:
1) with acetone, clean upper die and lower die and the titanium-alloy sheet metal of shaping dies, graphitization on the upper die and lower die of shaping dies and titanium-alloy sheet metal;
2) open hot former, upper die and lower die are heated to 630-650 degree, titanium-alloy sheet metal is positioned on counterdie to preheating 5-10min at 630-650 ℃ of temperature;
3) after the equalized temperature of titanium-alloy sheet metal and counterdie, carry out upper and lower mould matched moulds, keep temperature 630-650 degree, clamping pressure is controlled at 70-90 ton, pressurize 15-20 minute;
4) open upper die and lower die, take out titanium-alloy sheet metal;
5) remove graphite.
2. titanium-alloy sheet metal forming and machining method according to claim 1, is characterized in that, after matched moulds, the clearance distance between patrix and counterdie and the thickness of titanium-alloy sheet metal adapt.
3. titanium-alloy sheet metal forming and machining method according to claim 2, is characterized in that, the both sides, upper end of described patrix, and the both sides, lower end of counterdie are equipped with hangs rod, and the periphery of the periphery of patrix upside and counterdie downside is respectively provided with a circle presser feet groove.
4. titanium-alloy sheet metal forming and machining method according to claim 2, is characterized in that, patrix is Ra1.6 with the roughness of the relative shape face of counterdie.
5. according to the arbitrary described titanium-alloy sheet metal forming and machining method of claim 1-4, it is characterized in that, the upper die and lower die material of described shaping dies is Mid-Si Mo Cast Iron.
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| CN201410257969.7A CN103990664A (en) | 2014-06-11 | 2014-06-11 | Method for forming titanium alloy sheet metal part |
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| CN201410257969.7A CN103990664A (en) | 2014-06-11 | 2014-06-11 | Method for forming titanium alloy sheet metal part |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384281A (en) * | 2014-11-26 | 2015-03-04 | 沈阳飞机工业（集团）有限公司 | Hot forming method for aluminum lithium alloy sheet metal parts |
| CN104874661A (en) * | 2015-06-17 | 2015-09-02 | 沈阳飞机工业（集团）有限公司 | Thermal deep-drawing forming machining method for titanium alloy parts |
| CN105344819A (en) * | 2015-11-27 | 2016-02-24 | 沈阳飞机工业（集团）有限公司 | Isothermal forming die of large-curvature titanium alloy covering part and forming method of isothermal forming die |
| CN105855382A (en) * | 2016-03-30 | 2016-08-17 | 南京航空航天大学 | Creep age forming method for wallboard and pre-pressing mold |
| CN106271441A (en) * | 2016-08-30 | 2017-01-04 | 北京普惠三航科技有限公司 | The thermal creep manufacturing process of machining lightening grooves titanium alloy covering |
| CN107457279A (en) * | 2017-08-04 | 2017-12-12 | 北京航星机器制造有限公司 | A kind of titanium alloy barrel body class part gas ket justifies manufacturing process |
| CN110508660A (en) * | 2019-07-31 | 2019-11-29 | 上海航天精密机械研究所 | Titanium alloy ring shell structure cold drawing depth-vacuum thermal creep combined shaping method |
| CN110640003A (en) * | 2019-09-17 | 2020-01-03 | 成都飞机工业（集团）有限责任公司 | Forming process method of titanium alloy ultra-thick wall plate |
| CN112775311A (en) * | 2020-12-24 | 2021-05-11 | 中航贵州飞机有限责任公司 | Low-cost pressure testing method for titanium and titanium alloy thermal forming die |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384281A (en) * | 2014-11-26 | 2015-03-04 | 沈阳飞机工业（集团）有限公司 | Hot forming method for aluminum lithium alloy sheet metal parts |
| CN104874661A (en) * | 2015-06-17 | 2015-09-02 | 沈阳飞机工业（集团）有限公司 | Thermal deep-drawing forming machining method for titanium alloy parts |
| CN105344819A (en) * | 2015-11-27 | 2016-02-24 | 沈阳飞机工业（集团）有限公司 | Isothermal forming die of large-curvature titanium alloy covering part and forming method of isothermal forming die |
| CN105344819B (en) * | 2015-11-27 | 2017-11-28 | 沈阳飞机工业（集团）有限公司 | The isothermal forming mould and its manufacturing process of deep camber titanium alloy covering part |
| CN105855382A (en) * | 2016-03-30 | 2016-08-17 | 南京航空航天大学 | Creep age forming method for wallboard and pre-pressing mold |
| CN106271441A (en) * | 2016-08-30 | 2017-01-04 | 北京普惠三航科技有限公司 | The thermal creep manufacturing process of machining lightening grooves titanium alloy covering |
| CN107457279A (en) * | 2017-08-04 | 2017-12-12 | 北京航星机器制造有限公司 | A kind of titanium alloy barrel body class part gas ket justifies manufacturing process |
| CN107457279B (en) * | 2017-08-04 | 2019-04-19 | 北京航星机器制造有限公司 | A kind of titanium alloy barrel body class part gas ket circle manufacturing process |
| CN110508660A (en) * | 2019-07-31 | 2019-11-29 | 上海航天精密机械研究所 | Titanium alloy ring shell structure cold drawing depth-vacuum thermal creep combined shaping method |
| CN110640003A (en) * | 2019-09-17 | 2020-01-03 | 成都飞机工业（集团）有限责任公司 | Forming process method of titanium alloy ultra-thick wall plate |
| CN112775311A (en) * | 2020-12-24 | 2021-05-11 | 中航贵州飞机有限责任公司 | Low-cost pressure testing method for titanium and titanium alloy thermal forming die |
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Application publication date: 20140820 |