CN109622770A - A kind of titanium-alloy thin-plate electricity auxiliary subsection progressive molding device and method - Google Patents
A kind of titanium-alloy thin-plate electricity auxiliary subsection progressive molding device and method Download PDFInfo
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- CN109622770A CN109622770A CN201811561155.7A CN201811561155A CN109622770A CN 109622770 A CN109622770 A CN 109622770A CN 201811561155 A CN201811561155 A CN 201811561155A CN 109622770 A CN109622770 A CN 109622770A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
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- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The present invention relates to a kind of titanium-alloy thin-plate electricity auxiliary subsection progressive molding device and methods, device includes cavity plate, punch-pin and the pulse power, cavity plate and punch-pin are connect with the pulse power respectively, cavity plate width is greater than punch-pin, and when work, device is mounted on press machine, the length of plate is greater than the width of cavity plate, plate is placed between cavity plate and punch-pin, and the output electric current of high energy direct current pulse power source flows through punch-pin, plate and cavity plate and constitutes circuit, carries out being segmented progressively heated forming to plate.Compared with prior art, the present invention is heated using high energy direct current pulse power source directly to forming blank, without heating whole set of die, heating speed is fast, reduces influence of the heating to titanium alloy sheet penalty and surface oxidation, improves the forming property of titanium-alloy thin-plate, rebound after reducing titanium-alloy thin-plate forming, it is combined with segmentation progressive molding technique, the titanium alloy thin wall component of energy molding large can satisfy requirement of the helicopter blade to titanium alloy entirety bound edge.
Description
Technical field
The present invention relates to a kind of titanium-alloy thin-plate forming device and methods, assist more particularly, to a kind of titanium-alloy thin-plate electricity
It is segmented progressive molding device and method.
Background technique
It is common to have become aerospace because having the excellent performance such as specific strength height, high temperature resistant, corrosion-resistant for titanium alloy
Material.Helicopter rotor blade is more and more to be manufactured using composite material, but composite material blade is easy to produce when being impacted
Raw delamination and damage, it is therefore desirable to give blade leading edge bound edge.Military service longevity of the weight and corrosion resistance of blade leading edge bound edge to blade
Life influence is very big, uses titanium alloy that stainless steel is replaced to have become development as the leading edge bound edge material of helicopter blade and becomes
Gesture.The defects of titanium alloy temperature-room type plasticity is poor, and room temperature forming is easy to appear rupture and big rebound, and use traditional hot forming work
Skill needs whole heating mould, and energy consumption is high, and forming efficiency is low, and surface oxidation is serious.
The titanium alloy bound edge of composite material blade of helicopter is with scantling is big, thickness is thin, curved surface is complicated, surface quality
The features such as high, and it is manufactured in engineering and proposes higher requirement.Manufacturing process retrieval to composite material metal hemming edge
It was found that: Nanjing Aero-Space University Xie Lansheng etc. has carried out bound edge forming to TB8 titanium alloy at 625 DEG C, keeps the temperature 10 minutes, has
Lesser springback capacity, the method need whole heating mould, and energy consumption is high, and forming period is long, and part aoxidizes serious (blade leading edge packet
Iron technical study, Nanjing Aero-Space University's master thesis, 2013).Ma Xiaojian et al. proposes one kind and is used for
The electrolysis manufacturing process (application publication number CN104404613A) of composite material blade metal hemming edge, but the method have forming when
Between long, the defects such as stock utilization is low.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of titanium-alloy thin-plate electricity
Auxiliary subsection progressive molding device and method.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of titanium-alloy thin-plate electricity auxiliary subsection progressive molding device, including cavity plate, punch-pin and the pulse power, described is recessed
Mould and punch-pin are connect with the pulse power respectively, and cavity plate width is greater than punch-pin, and when work, the device is mounted on press machine,
The length of plate is greater than the width of cavity plate, and plate is placed between cavity plate and punch-pin, the output electric current stream of high energy direct current pulse power source
Circuit is constituted through punch-pin, plate and cavity plate, plate is carried out to be segmented progressively heated forming.
Copper electrode is respectively equipped on the cavity plate and punch-pin, the copper electrode is connect with the pulse power.
Device further includes temperature measuring equipment and computer, plate and plate and mould in the temperature measuring equipment acquisition forming process
Have the temperature variation data of contact area and is sent to computer, the pushing rate and termination of the computer control press machine
Condition.
The temperature measuring equipment is infrared temperature measurement apparatus.
The punch-pin, die surface are cambered surface, the shape of arc shape and helicopter rotor blade leading edge bound edge
Match.
The cavity plate is located at below punch-pin, and cavity plate is equipped with positioning pin, for positioning to plate.
A method of it is formed using the device, comprising the following steps:
S1: the device tool is mounted on press machine；
S2: the conducting wire both ends of the pulse power are separately connected the electricity of the copper on punch-pin and cavity plate by collet or other modes
Pole；
S3: fixing temperature measuring equipment by the press machine, and the formation zone of the temperature measuring equipment alignment plate passes through
Data line makes temperature measuring equipment be connected with computer, according to the related temperature measuring parameter of thermometric condition setting temperature measuring equipment and calibrates thermometric
Precision；
S4: plate being placed on the cavity plate, and plate one section of alignment punch-pin to be formed simultaneously positions, and control press machine makes
Punch-pin comes downwards to the position contacted with plate, and punch-pin, plate and cavity plate is made to form closed circuit；
S5: adjusting current parameters on the pulse power, opens pulse current switch, so that entire circuit is powered, to plate
Preheating；
S6: after adjusting press machine pushing parameter on computers, starting press machine pushes its automatic stabilisation, entire mistake
It remains that plate is powered in journey, after the completion of primary pushing process, mold is kept to be closed appropriate duration, to plate heat-insulation pressure keeping,
Make its fully deformed；
S7: closing power supply, power off circuit, controls press machine backhaul, and punch-pin lifts, and relocates plate, carries out next
The forming of section repeats S4~S7, until plate completes the forming of whole region.
Compared with prior art, the invention has the following advantages that
(1) electric assist formation is heated using high energy direct current pulse power source directly to forming blank, without heating whole set of die,
Energy-saving, heating speed is fast, reduces influence of the heating to titanium alloy sheet penalty and surface oxidation, improves titanium-alloy thin-plate
Forming property, reduce titanium-alloy thin-plate forming after rebound.
(2) using segmentation progressive molding technique, the component of larger size can be shaped, helicopter blade is can satisfy and titanium is closed
The requirement of gold entirety bound edge is avoided using large-scale thermoforming equipment and large mold processing, can also be to avoid using Welder
The weld defect that skill generates, it is high in machining efficiency.
(3) pushing process of computerizeing control is adopted, and computer real-time detection temperature, high energy arteries and veins are connected to by temperature measuring equipment
It rushes DC power output voltage and frequency is adjustable, guarantee that the forming parameter and current parameters stabilization in entire forming process can
Control.
(4) temperature measuring equipment has used infrared temperature measurement apparatus, and infrared temperature measurement apparatus is placed in outside mold, do not need by thermocouple with
Mold or plate contact do not have an impact electricity auxiliary progressive molding process；The temperature measurement accuracy of infrared temperature measurement apparatus and sensitivity
All it is much higher than general contact thermocouple measurement method, it can more acurrate capture titanium-alloy thin-plate electricity auxiliary subsection progressive molding mistake
The temperature change of plate in journey, establishes the relationship of temperature change Yu part forming quality, convenient for determining suitable current parameters.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the present embodiment forming device；
Fig. 2 is the local overlooking schematic diagram of the present embodiment mold；
Fig. 3 is the flow chart of the present embodiment manufacturing process.
Appended drawing reference:
1- upper die holder, 2- lower die holder, the upper insulating pad of 3-, insulating pad under 4-, 5- punch-pin, 6- cavity plate, 7- titanium alloy sheet
Material, 8- plate positioning pin, 9- copper electrode, the big current carrying conductor of 10-, 11- high energy direct current pulse power source, 12- guide sleeve, 13- guide post.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
Embodiment
As shown in Figure 1, 2, processing is used in the present embodiment for titanium-alloy thin-plate electricity auxiliary subsection progressive molding device
Mold and corresponding titanium-alloy thin-plate tested, to verify the electric auxiliary subsection of the medium-and-large-sized titanium alloy plate of actual production gradually
Into forming process, forming device include: upper die holder 1, lower die holder 2, upper insulating pad 3, lower insulating pad 4, punch-pin 5, cavity plate 6,
Titanium alloy plate 7, plate positioning pin 8, copper electrode 9, big current carrying conductor 10, high energy direct current pulse power source 11, guide sleeve 12 and guide post
13。
Wherein, upper mold module and lower die module are connected by guide post 13, and titanium alloy plate 7 is formed in when molding, survey
Warm device carries out thermometric to plate and plate and mold contact area.
Upper mold module includes: the copper electrode 9 on upper die holder 1 and the punch-pin 5 and punch-pin 5 for being set to 1 lower section of upper die holder.
Lower die module includes: the copper electrode 9 on lower die holder 2 and the cavity plate 6 and cavity plate 6 for being set to 2 top of lower die holder.
Temperature measuring equipment includes: thermal infrared imager, data line and computer, in which: thermal infrared imager and computer pass through number
It is connected according to line.
Plate positioning pin 8 is fixed on cavity plate 6, for limiting the position of titanium alloy plate 7.Sliding is provided on guide post 13
Guide sleeve 12.
As shown in figure 3, the method that the forming device carries out large titanium alloy thin plate electricity auxiliary subsection progressive molding, passes through
Following steps are realized:
S1: forming device is installed on press machine；
S2: the collet at 10 both ends of big current carrying conductor of high energy pulse DC power supply 11 is separately connected on punch-pin 5 and cavity plate 6
Copper electrode 9；
S3: (distance 0.5m) fixes thermal infrared imager using tripod by press machine, by the camera lens axis of thermal infrared imager
Line is directed at the formation zone of titanium alloy plate 7, so that thermal imaging system is connected with computer by data line, infrared according to thermometric condition setting
The related temperature measuring parameter of thermal imaging system simultaneously calibrates temperature measurement accuracy；
S4: titanium alloy plate 7 (having a size of 95mm × 60mm × 0.5mm) is placed on cavity plate 5, and control press makes punch-pin 6
The position contacted with titanium alloy plate 7 is come downwards to, punch-pin 6, titanium alloy plate 7 and cavity plate 5 is made to form closed circuit, power supply output
Pulse current voltage and frequency it is manually adjustable；
S5: adjusting current parameters on high energy pulse DC power supply 11, opens pulse current switch, keeps entire circuit logical
Electricity carries out the preheating of appropriate time to plate；
S6: after adjusting press machine pushing parameter on computers, starting press machine pushes it automatically, in whole process
It remains that plate is powered, after the completion of primary pushing process, keeps mold to be closed appropriate duration, heat preservation is risen to titanium alloy plate 7
Pressure maintaining effect keeps its deformation abundant；
S7: power pulse output is closed, circuit is powered off, controls press machine backhaul, punch-pin lifts, by titanium alloy plate 7
It is taken out from cavity plate 5, relocates titanium alloy plate 7, carry out next step circulate operation.
The present embodiment is integrated with temp sensing function, can be according to the variation regulating power source voltage of measurement temperature and sheet forming effect
And the size of pulse frequency, guarantee that progressive molding process temperature is suitable, forming effect is stablized.
The present invention is not limited to the above embodiment, and all technical solutions formed using equivalent replacement are belonged to the present invention and wanted
The protection scope asked.
Claims (7)
1. a kind of titanium-alloy thin-plate electricity auxiliary subsection progressive molding device, which is characterized in that including cavity plate, punch-pin and pulse electricity
Source, the cavity plate and punch-pin are connect with the pulse power respectively, and cavity plate width is greater than punch-pin, when work, the device installation
On press machine, the length of plate is greater than the width of cavity plate, and plate is placed between cavity plate and punch-pin, high energy direct current pulse power source
Output electric current flows through punch-pin, plate and cavity plate and constitutes circuit, carries out being segmented progressively heated forming to plate.
2. a kind of titanium-alloy thin-plate electricity auxiliary subsection progressive molding device according to claim 1, which is characterized in that described
Cavity plate and punch-pin on be respectively equipped with copper electrode, the copper electrode is connect with the pulse power.
3. a kind of titanium-alloy thin-plate electricity auxiliary subsection progressive molding device according to claim 1, which is characterized in that also wrap
Include temperature measuring equipment and computer, the temperature of plate and plate and mold contact area in the temperature measuring equipment acquisition forming process
Delta data is simultaneously sent to computer, the pushing rate and termination condition of the computer control press machine.
4. a kind of titanium-alloy thin-plate electricity auxiliary subsection progressive molding device according to claim 3, which is characterized in that described
Temperature measuring equipment be infrared temperature measurement apparatus.
5. a kind of titanium-alloy thin-plate electricity auxiliary subsection progressive molding device according to claim 1, which is characterized in that described
Punch-pin, die surface be cambered surface, arc shape is matched with the shape of helicopter rotor blade leading edge bound edge.
6. a kind of titanium-alloy thin-plate electricity auxiliary subsection progressive molding device according to claim 1, which is characterized in that described
Cavity plate be located at below punch-pin, cavity plate is equipped with positioning pin, for positioning to plate.
7. a kind of method that the device using as described in claim 1~6 is any is formed, which is characterized in that including following
Step:
S1: the device tool is mounted on press machine；
S2: the copper electrode conducting wire both ends of the pulse power being separately connected by collet or other modes on punch-pin and cavity plate；
S3: fixing temperature measuring equipment by the press machine, by the formation zone of the temperature measuring equipment alignment plate, passes through data
Line makes temperature measuring equipment be connected with computer, according to the related temperature measuring parameter of thermometric condition setting temperature measuring equipment and calibrates thermometric essence
Degree；
S4: plate being placed on the cavity plate, and plate one section of alignment punch-pin to be formed simultaneously positions, and control press machine makes punch-pin
The position contacted with plate is come downwards to, punch-pin, plate and cavity plate is made to form closed circuit；
S5: adjusting current parameters on the pulse power, opens pulse current switch, entire circuit is made to be powered, preheat to plate；
S6: after adjusting press machine pushing parameter on computers, starting press machine pushes its automatic stabilisation, in whole process
Remain that plate is powered, after the completion of primary pushing process, keeping mold to be closed appropriate duration makes it to plate heat-insulation pressure keeping
Fully deformed；
S7: closing power supply, power off circuit, controls press machine backhaul, and punch-pin lifts, and relocates plate, carries out next section
Forming repeats S4~S7, until plate completes the forming of whole region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811561155.7A CN109622770B (en) | 2018-12-20 | 2018-12-20 | Electrically-assisted sectional incremental forming device and method for titanium alloy sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811561155.7A CN109622770B (en) | 2018-12-20 | 2018-12-20 | Electrically-assisted sectional incremental forming device and method for titanium alloy sheet |
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| Publication Number | Publication Date |
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| CN109622770A true CN109622770A (en) | 2019-04-16 |
| CN109622770B CN109622770B (en) | 2021-01-22 |
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| CN201811561155.7A Active CN109622770B (en) | 2018-12-20 | 2018-12-20 | Electrically-assisted sectional incremental forming device and method for titanium alloy sheet |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110560618A (en) * | 2019-09-03 | 2019-12-13 | 武汉理工大学 | Electromagnetic auxiliary forming process for high-strength light alloy complex special-shaped component |
| CN111957777A (en) * | 2020-08-05 | 2020-11-20 | 合肥工业大学 | Electric auxiliary bending forming process method for high-temperature titanium alloy grid rib wallboard |
| CN112246944A (en) * | 2020-09-29 | 2021-01-22 | 上海交通大学 | Electric pulse-assisted hot stamping forming method and device for titanium or titanium alloy |
| CN112916697A (en) * | 2021-01-08 | 2021-06-08 | 中国航空制造技术研究院 | Helicopter blade edge covering subsection step-by-step forming method |
| CN112974642A (en) * | 2021-02-09 | 2021-06-18 | 上海交通大学 | Electrically-assisted forming device and process for metal polar plate of fuel cell |
| CN113000667A (en) * | 2021-03-12 | 2021-06-22 | 上海交通大学 | Electric-assisted superplastic forming and aging treatment full-flow manufacturing method for aluminum-lithium alloy thin-wall component |
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| CN112974642A (en) * | 2021-02-09 | 2021-06-18 | 上海交通大学 | Electrically-assisted forming device and process for metal polar plate of fuel cell |
| CN112974642B (en) * | 2021-02-09 | 2022-10-11 | 上海交通大学 | Electrically-assisted forming device and process for metal polar plate of fuel cell |
| CN113000667A (en) * | 2021-03-12 | 2021-06-22 | 上海交通大学 | Electric-assisted superplastic forming and aging treatment full-flow manufacturing method for aluminum-lithium alloy thin-wall component |
| CN113000667B (en) * | 2021-03-12 | 2022-06-03 | 上海交通大学 | Electric-assisted superplastic forming and aging treatment full-flow manufacturing method for aluminum-lithium alloy thin-wall component |
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