CN101947596A - Titanium alloy drawing machine tool and forming method - Google Patents
Titanium alloy drawing machine tool and forming method Download PDFInfo
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- CN101947596A CN101947596A CN 201010281462 CN201010281462A CN101947596A CN 101947596 A CN101947596 A CN 101947596A CN 201010281462 CN201010281462 CN 201010281462 CN 201010281462 A CN201010281462 A CN 201010281462A CN 101947596 A CN101947596 A CN 101947596A
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Abstract
The invention discloses a titanium alloy drawing machine tool and a forming method. The drawing machine tool comprises a control system, a die and two mobile construction members, wherein the mobile construction member is provided with a drawing force transducer and a displacement transducer, and the drawing force transducer and the displacement transducer are connected with the control system. The method comprises the following steps: A, at normal temperature, prestretching titanium alloy workpieces by two mobile construction members to tightly clamp two ends of the titanium alloy workpiece; B, continuously applying tensile force to cause the titanium alloy workpiece to generate reserved plastic distortion, reading the tensile force value at the time by the control system to serve as the basis, and controlling two mobile construction members to keep the tensile force value constant in the whole plastic distortion process; and C, controlling the movement of two mobile construction members by the control system to cause the titanium alloy workpiece and the die to gradually fit to be finally extended and formed. The invention successfully realizes the cold stretch forming of the titanium alloy material and can greatly accelerate the titanium alloy material to be used in fields, such as aviation industry and the like.
Description
Technical field
The present invention relates to the method for a kind of drawing and forming lathe and stretch forming, be specifically related to a kind ofly can be used for the lathe of titanium alloy cold stretch and the method for shaping.
Background technology
The drawing and forming lathe is a kind of known equipment, a kind of plate stretch-forming machine is disclosed as Chinese invention patent application 200910067216.9, mainly by frame, each side a plurality of material mechanism and the feeding clip mechanisms of drawing of a row are formed, each draws material mechanism to be made up of 2-3 hydraulic cylinder, one end of hydraulic cylinder connects with the frame activity respectively, and the other end connects with feeding clip mechanism is movable jointly.
The aircraft manufacturer is all known if can adopt titanium alloy covering and titanium alloy section bar to be welded into integral panel, replace the aluminium alloy integral panel, the material arrangements science, the fighter plane fuselage weight can significantly alleviate, performance also can significantly improve, and far surpasses the fighter plane of aluminium alloy integral panel fuselage.And the percentage elongation and the aluminium alloy of titanium alloy are suitable, so the part that aluminium alloy can be shaped, titanium alloy ought to also can be shaped.The overstretching test is done to titanium alloy material in countries in the world, all comes to an end with fracture, and Here it is, and titanium alloy material fails to widely apply the reason of making at the fighter plane fuselage so far.
External brainstrust is behind test failure, and having drawn titanium alloy material is impossible cold stretch shaping (unscientific) conclusion.So far, the whole world assert that all titanium alloy material can not cold drawn shaping.Existing stretch forming press such as U.S. HUFFORD stretch forming press, does not possess the ability of direct cold drawn shaping titanium alloy component.
Chinese invention patent application 200680040245.0 discloses a kind of titanium stretch forming apparatus and method, can realize the hot-stretch of titanium or titanium alloy material is shaped, this titanium stretch forming apparatus comprises: a) mould, it has the working face that has preliminary election non-rectangle cross-sectional profiles, described profile is suitable for admitting and shaping long and thin metal workpiece, and wherein described at least working face comprises heat-barrier material; B) heater, it is used for described workpiece resistance heated to operating temperature; And c) mobile member, it is used to make described mould and workpiece relative to each other to move, and causes to cause described workpiece to abut against described working face extension and crooked.The step of this method of stretch forming is: the long and thin metal workpiece with preliminary election non-rectangle cross-sectional profiles a) is provided; B) provide the mould that has with the working face of described cross-sectional profiles complementation, wherein described at least working face comprises heat-barrier material; C) make electric current pass described workpiece and with described workpiece resistance heated to operating temperature; D) when described workpiece is in described operating temperature, by causing described workpiece and described mould relative to each other to move to abut against the described working face described workpiece that is shaped, and then cause described workpiece plastic elongation and crooked and with the net shape of the moulding one-tenth preliminary election of described workpiece.Owing to adopt hot-stretch to be shaped, need to dispose heater in the equipment, make the structure of equipment become complicated, also increased the difficulty of control, adopt hot-stretch also to be unfavorable for energy-conserving and environment-protective simultaneously.
Summary of the invention
The technical problem that the present invention will solve provides a kind of lathe that can be used for the titanium alloy cold stretch, to overcome the above-mentioned defective of prior art.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: a kind of titanium alloy stretching lathe, comprise control system, mould and be arranged on two mobile members of described mould both sides, be provided with pulling force sensor and displacement transducer on each mobile member, described pulling force sensor is connected with described control system with displacement transducer.
Preferably, described mobile member comprises stretching oil cylinder and the chuck that is connected stretching oil cylinder end, and described stretching oil cylinder is connected with hydraulic pump by control valve, and described control valve, hydraulic pump all are connected with described control system.
More preferably, described pulling force sensor is arranged on the junction of stretching oil cylinder and chuck.
More preferably, described displacement transducer is arranged on the stretching oil cylinder.
More preferably, described stretching oil cylinder is a two-way cylinder.
Another technical problem that the present invention will solve provides a kind of method of titanium alloy stretch forming.
This method may further comprise the steps:
A. at normal temperatures, utilize two mobile members that titanium alloy workpiece is carried out prestretched, the two ends of titanium alloy workpiece are clamped by two mobile members, can not produce slip;
B. continue to apply pulling force, make titanium alloy workpiece produce a predetermined amount of plastic deformation, according to the pulling force signal of pulling force sensor feedback, control system reads the value of thrust of this moment as the control foundation, and controls two mobile members and keep this value of thrust constant in whole plastic history;
C. the motion of two mobile members of control system control is progressively fitted and final stretch forming titanium alloy workpiece and mould.
Preferably, described mobile member comprises stretching oil cylinder and the chuck that is connected stretching oil cylinder end, and described stretching oil cylinder is connected with hydraulic pump by control valve, and described control valve, hydraulic pump all are connected with described control system.
Preferably, preset the trade mark and the specification of various titanium alloy materials in described control system, before stretching, as long as material trademark, specification and the predetermined amount of plastic deformation of input titanium alloy workpiece, control system can calculate needed pretension automatically.
Preferably, predetermined amount of plastic deformation is 1%～1.2% among the described step B.
The invention has the beneficial effects as follows that the cold stretch that has successfully realized titanium alloy material is shaped,, have very significant meaning, can greatly promote the application of titanium alloy material in fields such as aircraft manufacturings particularly for aircraft industry.Utilize the present invention, can produce titanium alloy covering and the titanium alloy section bar used on the aircraft, and then be welded into integral panel, can significantly alleviate fuselage weight, aeroplane performance is significantly improved, surpass all aluminium alloy aircrafts.If after the huge airline carriers of passengers of quantity is also used titanium alloy instead in a large number, just can reach the low-carbon (LC) target that people pursue energy-conserving and environment-protective.
Description of drawings
Fig. 1 is the schematic diagram of titanium alloy stretching lathe of the present invention.
Fig. 2 utilizes the present invention's a kind of view of lathe when titanium alloy is carried out stretch forming that stretch.
The specific embodiment
As shown in Figure 1, a kind of titanium alloy stretching of the present invention lathe comprises control system (not shown), mould 1 and is arranged on two mobile members 10 of mould 1 both sides, each mobile member 10 comprises stretching oil cylinder 5 and is connected the chuck 3 of stretching oil cylinder end, stretching oil cylinder 5 is connected with hydraulic pump 8 for two-way cylinder and by control valve 7, and described control valve 7, hydraulic pump 8 all are connected with control system.Junction at stretching oil cylinder 5 and chuck 3 is provided with pulling force sensor 4, is used for sensing mobile member 10 and is applied to pulling force on the titanium alloy workpiece 2; Be provided with displacement transducer 6 on stretching oil cylinder 5, pulling force sensor 4 and the position of displacement transducer 6 on mobile member 10 are not unique.Pulling force sensor 4 all is connected with described control system with displacement transducer 6.
Introducing below utilizes above-mentioned stretching lathe to carry out the method for titanium alloy stretch forming.
The main design of the method for stretch forming of the present invention is that a certain plasticity of setting the titanium alloy plastic zone is put pairing pulling force, control system just automatically is stretched to titanium alloy material the plasticity point that sets, and remaining this plasticity in whole forming process, to put pairing pulling force constant.Concrete steps are as follows: this method may further comprise the steps:
A. the two ends with titanium alloy workpiece 2 are clamped in respectively in two chucks 3, at normal temperatures, utilize 10 pairs of titanium alloy workpieces of two mobile members 2 to carry out prestretched, the two ends of titanium alloy workpiece 2 are clamped by the chuck 3 of two mobile members, can not produce slip, improve the uniformity of control accuracy and forming quality;
B. after prestretched is finished, two mobile members 10 continue titanium alloy workpiece 2 is applied pulling force, make titanium alloy workpiece 2 produce a predetermined amount of plastic deformation, such as 10 meters long blanks are stretched to 10.1 meters, pulling force signal according to pulling force sensor 4 feedbacks, control system reads the value of thrust of this moment as the control foundation, and controls two mobile members 10 and keep this pulling force constant in whole plastic history;
C. as shown in Figure 2, the motion of two mobile members 10 of control system control, how the direction of motion of the oil cylinder 5 that no matter stretches changes, and guarantees that all the actual pulling force all-the-time stable of workpiece is constant, and titanium alloy workpiece 2 and mould 1 are progressively fitted and final stretch forming.
In the present invention, in control system, can preset the trade mark and the specification of various titanium alloy materials, before stretching, as long as material trademark, specification and the predetermined amount of plastic deformation of input titanium alloy workpiece, control system can calculate needed pretension automatically.After the lathe prestretching is adjusted to the right place, continue that again titanium alloy workpiece 2 is carried out straight line and stretch, according to the displacement of displacement transducer 6, judged whether to reach predetermined amount of plastic deformation.After reaching predetermined amount of plastic deformation, control system reads current actual value of thrust, remembers this numerical value and serves as according to the monitoring hydraulic system with this numerical value, and keep this pulling force constant in the whole plastic history of back.
When practical operation, the operator sets a certain amount of plastic deformation of plastic zone earlier in control system, generally between 1%～1.2%, then in the trade mark and size input control system with workpiece material, last clamping workpiece is pressed start button, and the stretching lathe can be finished drawing process automatically.
In the present invention, control system is shaped each workpiece by input value controller bed motion all the time under the amount of plastic deformation of operator's input, it is constant that the shaping pulling force keeps, fundamentally solved the problem of breaking of titanium alloy component, and guaranteed that all workpiece are in full accord.
The present invention has realized that successfully the cold stretch of titanium alloy material is shaped, and both can be used for transforming U.S. HUFFORD type lathe, also can be used for the manufacturing of new machine.
The above only is the present invention's a kind of embodiment wherein, is not to be used for limiting protection scope of the present invention, and every conversion of doing according to claim of the present invention is all within protection scope of the present invention.
Claims (9)
1. titanium alloy stretching lathe, comprise control system, mould (1) and be arranged on two mobile members (10) of described mould both sides, it is characterized in that, be provided with pulling force sensor (4) and displacement transducer (6) on each mobile member (10), described pulling force sensor (4) is connected with described control system with displacement transducer (6).
2. titanium alloy stretching lathe according to claim 1, it is characterized in that, described mobile member (10) comprises stretching oil cylinder (5) and is connected the chuck (3) of stretching oil cylinder end, described stretching oil cylinder (5) is connected with hydraulic pump (8) by control valve (7), and described control valve (7), hydraulic pump (8) all are connected with described control system.
3. titanium alloy stretching lathe according to claim 2 is characterized in that, described pulling force sensor (4) is arranged on the junction of stretching oil cylinder (5) and chuck (3).
4. titanium alloy stretching lathe according to claim 2 is characterized in that described displacement transducer (6) is arranged on the stretching oil cylinder (5).
5. titanium alloy stretching lathe according to claim 2 is characterized in that described stretching oil cylinder (5) is a two-way cylinder.
6. method of utilizing the described lathe of claim 1 to carry out titanium alloy stretch forming is characterized in that may further comprise the steps:
A. at normal temperatures, utilize two mobile members that titanium alloy workpiece is carried out prestretched, the two ends of titanium alloy workpiece are clamped by two mobile members, can not produce slip;
B. continue to apply pulling force, make titanium alloy workpiece produce a predetermined amount of plastic deformation, according to the pulling force signal of pulling force sensor feedback, control system reads the value of thrust of this moment as the control foundation, and controls two mobile members and keep this value of thrust constant in whole plastic history;
C. the motion of two mobile members of control system control is progressively fitted and final stretch forming titanium alloy workpiece and mould.
7. the method for titanium alloy stretch forming according to claim 6, it is characterized in that, described mobile member comprises the stretching oil cylinder and is connected the chuck of stretching oil cylinder end, described stretching oil cylinder is connected with hydraulic pump by control valve, and described control valve, hydraulic pump all are connected with described control system.
8. the method for titanium alloy stretch forming according to claim 6, it is characterized in that, in described control system, preset the trade mark and the specification of various titanium alloy materials, before stretching, as long as material trademark, specification and the predetermined amount of plastic deformation of input titanium alloy workpiece, control system can calculate needed pretension automatically.
9. the method for titanium alloy stretch forming according to claim 6 is characterized in that, amount of plastic deformation predetermined among the described step B is 1%～1.2%.
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| CN 201010281462 CN101947596A (en) | 2010-09-14 | 2010-09-14 | Titanium alloy drawing machine tool and forming method |
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| CN 201010281462 CN101947596A (en) | 2010-09-14 | 2010-09-14 | Titanium alloy drawing machine tool and forming method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272908A (en) * | 2013-06-13 | 2013-09-04 | 沈阳飞机工业（集团）有限公司 | Stretch forming method for titanium skin part |
| CN103722070A (en) * | 2014-01-22 | 2014-04-16 | 吉林大学 | Method for forming three-dimensional curve surface by using discrete displacement loading mode |
| CN104492899A (en) * | 2014-07-31 | 2015-04-08 | 贵州航天风华精密设备有限公司 | Stretching process for novel high-strength corrosion-resistant aluminum alloy |
| CN109092965A (en) * | 2018-07-30 | 2018-12-28 | 河北创联机械制造有限公司 | A kind of three-dimension curved surface stretching-machine |
| CN109848277A (en) * | 2019-01-16 | 2019-06-07 | 沈阳飞机工业（集团）有限公司 | A kind of titanium alloy plate hot-stretch fixture for forming and manufacturing process |
| CN110961517A (en) * | 2018-09-29 | 2020-04-07 | 中国商用飞机有限责任公司 | Single-mode stretch forming method |
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| CN101297056A (en) * | 2005-11-04 | 2008-10-29 | 西瑞尔贝兹公司 | Titanium stretch forming apparatus and method |
| CN101712207A (en) * | 2009-09-08 | 2010-05-26 | 广东工业大学 | High performance and energy-saving double-acting hydrostatic press driven by servo motor |
| CN201776333U (en) * | 2010-09-14 | 2011-03-30 | 上海海都化学科技有限公司 | Titanium alloy drawing machine tool |
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| CN101297056A (en) * | 2005-11-04 | 2008-10-29 | 西瑞尔贝兹公司 | Titanium stretch forming apparatus and method |
| CN101712207A (en) * | 2009-09-08 | 2010-05-26 | 广东工业大学 | High performance and energy-saving double-acting hydrostatic press driven by servo motor |
| CN201776333U (en) * | 2010-09-14 | 2011-03-30 | 上海海都化学科技有限公司 | Titanium alloy drawing machine tool |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272908A (en) * | 2013-06-13 | 2013-09-04 | 沈阳飞机工业（集团）有限公司 | Stretch forming method for titanium skin part |
| CN103722070A (en) * | 2014-01-22 | 2014-04-16 | 吉林大学 | Method for forming three-dimensional curve surface by using discrete displacement loading mode |
| CN103722070B (en) * | 2014-01-22 | 2016-01-13 | 吉林大学 | A kind of method adopting discrete type displacement load mode forming three-dimensional curved surface |
| CN104492899A (en) * | 2014-07-31 | 2015-04-08 | 贵州航天风华精密设备有限公司 | Stretching process for novel high-strength corrosion-resistant aluminum alloy |
| CN109092965A (en) * | 2018-07-30 | 2018-12-28 | 河北创联机械制造有限公司 | A kind of three-dimension curved surface stretching-machine |
| CN110961517A (en) * | 2018-09-29 | 2020-04-07 | 中国商用飞机有限责任公司 | Single-mode stretch forming method |
| CN109848277A (en) * | 2019-01-16 | 2019-06-07 | 沈阳飞机工业（集团）有限公司 | A kind of titanium alloy plate hot-stretch fixture for forming and manufacturing process |
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Open date: 20110119 |