CN105710205A - Self-blocked heating incremental forming device for whole plate - Google Patents

Self-blocked heating incremental forming device for whole plate Download PDF

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Publication number
CN105710205A
CN105710205A CN201610210109.7A CN201610210109A CN105710205A CN 105710205 A CN105710205 A CN 105710205A CN 201610210109 A CN201610210109 A CN 201610210109A CN 105710205 A CN105710205 A CN 105710205A
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plate
temperature
progressive molding
fixture
overall
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CN201610210109.7A
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CN105710205B (en
Inventor
李小强
张永生
李东升
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Beihang University
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Beihang University
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D31/00Other methods for working sheet metal, metal tubes, metal profiles
    • B21D31/005Incremental shaping or bending, e.g. stepwise moving a shaping tool along the surface of the workpiece
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/16Heating or cooling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/003Positioning devices

Abstract

The invention discloses a self-blocked heating incremental forming device for a whole plate. The device comprises a three-axis numerical control machine tool, a forming tool, a plate clamp, a direct current power source, a wire, an insulation gasket, a temperature sensor, a temperature controller and an insulation box. A current loop is formed by the forming device and the plate through the power source, the wire and the plate clamp, and the temperature of the plate is increased through joule heat. The two ends of the plate are powered on, the whole plate is heated, and the temperature gradient is small. The semi-closed insulation box is installed, so that heat losses are reduced, and the energy utilization rate is increased; the temperature of the plate is measured through the temperature sensor, and the temperature of the plate is accurately controlled through closed-loop control. The technology can also be used for thick plate incremental forming machining with large forming force at the room temperature, and incremental forming machining of titanium alloy and magnesium alloy plates which are difficult to form at the room temperature.

Description

Plate is overall from resistance heating progressive molding device
[technical field]
The present invention relates to a kind of plate overall from resistance heating progressive molding device, belong to plate progressive molding processing technique field.
[background technology]
Technology conventional in traditional sheet forming is that mould punching shapes, and owing to having the advantages such as production efficiency height, forming quality height and consumable material are few, is relatively suitable for producing in enormous quantities single type part, occupies leading position for a long time in modern industry produces.
Along with the progress in epoch, the needs of product being tended to personalized and noveltyization, this requires that self product must be constantly updated regenerating by enterprise, just can occupy one seat in the fierce market competition.Traditional moulds stamp forming technology mold developing cycle length, capital expenditure are higher, can not meet enterprise and carry out the requirement of multi items, be pilot Development and Production.
Sheet material progressive molding technique is a kind of technique shaped without particular manufacturing craft, its basic thought is the shape according to part, plan shaping track, develop the control program of Digit Control Machine Tool, utilize the feed system of Digit Control Machine Tool, making forming tool move by the track of design, forming tool makes plate progressively shape with constantly extruding of plate, finally shapes required shape.This manufacturing process does not need special shaping dies, thus Operational preparation is fast, cost is low, is particularly suitable for the production of small lot, multi items, complex parts.
Although progressive molding technology has greater advantage and wide application prospect, but also has some non-negligible problems, as poor in forming accuracy, working (machining) efficiency is relatively low and less stable etc..In addition, progressive molding device rigidity is poor, when the higher sheet material of fabrication strength, often causes the deformation of forming tool because plastic force is excessive, causes that forming quality declines, even can not normally shape time serious.
For problem above, Chinese scholars has carried out the research of hot progressive molding, by heating the forming property that can improve plate, reduce the requirement to the rigidity of machine tool, improve forming accuracy, increase part can shape angles, and titanium alloy, the magnesium alloy parts that room temperature cannot shape can also be shaped.Heating means comprise LASER HEATING, local from hindering heating, muffle electric furnace heating, spin friction heating etc..
Laser heating method has the advantage that firing rate is fast, but hot spot is continually changing with the change of Working position, exists and controls the problem that difficulty is big, and laser equipment is costly.
From resistance, heating means equipment cost is low, firing rate is fast in local.But there is also some shortcomings, including: electric current passes through forming tool, and forming tool performance requirement is high;Heating region is continually changing, and temperature is not easily measured and controls;Lubricating oil is, in current loop, lubricating oil electric conductivity is had higher requirements between plate and forming tool;Electric spark etc. easily occurs.
Muffle electric furnace heating means heating-up temperature is uniform, temperature is easily controllable, but equipment design complexity, and it is not suitable for two point progressive molding.
Spin friction heating means are to provide a significantly high rotating speed to forming tool, produce heat by the friction of forming tool and plate.This method makes main axis stiffness reduce due to rotary freedom, and high-speed friction affects panel surface quality.
The advantages such as it is overall from resistance heating progressive molding device that the present invention proposes a kind of plate, and this device has that local is low from the equipment cost hindering heating means, firing rate is fast simultaneously and the plate homogeneous temperature of muffle electric furnace heating, temperature be easily controllable.And current loop is stable, will not produce electric spark;Lubricant does not affect current loop, reduces the requirement to lubricant.
[summary of the invention]
The problem that it is an object of the invention to presently, there are for the hot progressive molding equipment of plate, it is proposed to a kind of simple in construction, easy to use, safe, shape scope wide, the plate that machining accuracy is high is overall from resistance heating progressive molding device.This technology can be also used for the titanium alloy of difficult shaping, the processing of magnesium alloy sheet progressive molding under the big slab progressive molding processing of plastic force under room temperature and room temperature.
A kind of plate is overall to be included from resistance heating progressive molding device: three axis numerically controlled machine, forming tool, plate fixture, DC source, wire, insulation spacer, temperature sensor, temperature controller and couveuse;
Described forming device power supply, wire, plate fixture constitute current loop with plate, make plate temperature raise by Joule heat;At plate two ends galvanization, plate entirety heats up, and thermograde is little;Semiclosed couveuse is installed, reduces heat loss, improve energy utilization rate;By temperature sensor measurement plate temperature, and by the accurate panel material temperature degree of closed loop control.
Described three axis numerically controlled machine is the motion driving mechanism into apparatus for converting, including: digital control system, the servomotor in tri-directions of X, Y, Z, leading screw, machine tool chief axis etc., it is possible to make machine tool chief axis do Three Degree Of Freedom translational motion;
Described forming tool is connected with machine tool chief axis, does three axle translational motions along the track set under the drive of machine tool chief axis, and extrudes plate and make plate constantly be locally deformed with;
Described plate fixture comprises two energising fixtures and two plain clamps, energising fixture and plain clamp is alternate is in the layout of plate surrounding, make plate surrounding and plate support platform to be relatively fixed, insulation between energising fixture and plain clamp, wherein, two energising fixtures connect DC power anode and negative pole respectively, make plate be energized;
Described DC source can provide the low-tension current of the highest 36V, and its maximum output current should be not less than 200A, and for providing electric current to make it produce Joule heat to plate, and low pressure can ensure that the safety of operator;
Described wire one end connects power supply, and the other end is connected with energising fixture by binding post, and source current is transferred to plate;
Described insulation spacer is arranged on plate and plate supports between platform, is used for making to insulate between plate and lathe, and insulation spacer uses high temperature insulating material such as Muscovitum;
Described temperature sensor is used for measuring plate temperature, it is possible to be contact thermocouple or Infrared Thermocouple, the position being in the layout of on plate between fixture and machining area;
Described temperature controller can the temperature data that records of collecting temperature sensor, and contrast with the temperature data set, adjusted amount is also transferred to DC source, makes DC source regulate output and then regulate plate heating-up temperature, it is achieved temperature scaling factor;
Described couveuse is used for reducing heat loss, makes plate easily reach a high temperature and saves the energy, the heating region of couveuse parcel plate, and upper end has opening to make forming tool not contact with couveuse when processing plate, and couveuse is made up of heat-preservation cotton and supporting construction.
This plate is overall is applicable to the slab progressive molding processing that room temperature plastic force is bigger from resistance heating progressive molding device, reduces the technique requirement to the rigidity of machine tool, such as titanium alloy, the processing of magnesium alloy progressive molding.Single-point progressive molding can be realized when the supporting plate supporting plate maintains static;When the supporting plate supporting plate can realize two point progressive molding when vertically guide pillar moves freely.
Advantage of the present invention and having the beneficial effects that:
(1) this apparatus structure is simple, and cost is low, and heat temperature raising is fast.
(2) current loop contact is stable, does not have electric spark.
(3) plate entirety heating, thermograde is little.
(4) being provided with semiclosed couveuse, energy utilization rate is high.
(5) plate temperature is easily measured, it is easy to accomplish temperature scaling factor.
(6) improve sheet metal formability, increase the forming angle scope of material.
(7) reduce the residual stress of plate, reduce part resilience, improve forming accuracy.
(8) the progressive molding problem of the plates such as the titanium alloy of room temperature difficulty shaping, magnesium alloy is solved.
(9) problem of lathe insufficient rigidity during processing slab is solved.
(10) single-point progressive molding and two point progressive molding it are simultaneously suitable for.
[accompanying drawing explanation]
Fig. 1 is that plate is overall shapes schematic diagram from resistance heating progressive molding device two point.
Fig. 2 is that plate is overall shapes schematic diagram from resistance heating progressive molding device single-point.
Fig. 3 is that plate is overall from resistance heating progressive molding device plate clamping schematic diagram.
Number in the figure title:
1 plate support platform, 2 forming tools, 3 shaping dies, 4 plates,
5 high-temperature insulation pads, 6 energising fixtures, 7 lifting guide pillars, 8 binding posts, 9 temperature sensors,
10 wires, 11 DC sources, 12 plain clamps, 13 temperature controllers, 14 machine tool chief axis,
15 couveuses, 16 workbench.
[detailed description of the invention]
Device is made up of three axis numerically controlled machine, forming tool, plate fixture, power supply, wire, insulation spacer, temperature sensor, temperature controller, couveuse etc..The main shaft clamping forming tool of three axis numerically controlled machine, along the orbiting motion set, makes plate generation continuous print local deformation, ultimately generates required part.Device power supply, wire, plate fixture constitute current loop with plate, loop and lathe are reliably insulated with high-temperature insulation pad.The Joule heat produced by the low-voltage, high-current of 0-36V, 200-1000A makes plate temperature raise.
Illustrate that plate is overall for accompanying drawing 1 to shape from resistance heating progressive molding two point.
Set up three-dimensional part model with CAD software, then with CAM Software Create numerical control code, and numerical control code is imported Digit Control Machine Tool.
Raise plate support platform 1 to highest point and to fix, shaping dies 3 is arranged on workbench 15.Opening Digit Control Machine Tool to carry out cutter, after cutter is completed, withdrawing is to home.
Cutting out the plate 4 of suitable dimension, here, plate 4 is the length twice plus energising fixture 6 width that square and its length of side are equal to the square hole offered in the middle of plate support platform 1.Plate 4 being placed on plate and supports on platform 1, wherein plate supports and places the high-temperature insulation pad 5 that Muscovitum makes between platform 1 and plate 4.As shown in Figure 3, energising fixture 6 and plain clamp 12 is alternate is placed on plate 4 surrounding and fixes.By binding post 8 and wire 10, energising fixture 6 is connected with DC source 11, makes DC source 11, wire 10, binding post 8, energising fixture 6, plate 4 form current loop.
Unclamp plate and support platform 1 so that it is landing causes the contact force support plate support platform 1 of mould 3 and plate 4 under deadweight state.Open DC source 11 to switch, begin to warm up plate 4, after plate 4 reaches design temperature run numerical control code carry out digital control processing, for titanium alloy plate set temperature at about 500 DEG C.
In the course of processing, temperature sensor 9 is measured plate temperature and controls the output electric current of DC source 11 by controller 13 and regulate the temperature of plate 4, finally realizes the temperature scaling factor of plate 4, and plate 4 at high temperature realizes overall softening.
Lift forming tool 2 after machining, and close DC source 11, be reduced to after room temperature until temperature and take off part.
Illustrate that plate is overall for accompanying drawing 2 to shape from resistance heating progressive molding single-point.
Set up three-dimensional part model with CAD software, then with CAM Software Create numerical control code, and numerical control code is imported Digit Control Machine Tool.
Raise plate support platform 1 to highest point and to fix.Opening Digit Control Machine Tool to carry out cutter, after cutter is completed, withdrawing is to home.
Cutting out the plate 4 of suitable dimension, here, plate is the length twice plus energising fixture 6 width that square and its length of side are equal to the square hole offered in the middle of plate support platform 1.Plate 4 being placed on plate and supports on platform 1, wherein plate supports and places the high-temperature insulation pad 5 that Muscovitum makes between platform 1 and plate 4.As shown in Figure 3, energising fixture 6 and plain clamp 12 is alternate is placed on plate 4 surrounding and fixes.By binding post 8 and wire 10, energising fixture 6 is connected with DC source 11, makes DC source 11, wire 10, binding post 8, energising fixture 6, plate 4 form current loop.
Open DC source 11 to switch, begin to warm up plate 4, after plate 4 reaches design temperature run numerical control code carry out digital control processing, for titanium alloy plate set temperature at about 500 DEG C.
In the course of processing, temperature sensor 9 is measured plate temperature and controls the output electric current of DC source 11 by controller 13 and regulate the temperature of plate 4, finally realizes the temperature scaling factor of plate 4, and plate 4 at high temperature realizes overall softening.
Lift forming tool 2 after machining, and close DC source 11, be reduced to after room temperature until temperature and take off part.

Claims (6)

1. the overall heating progressive molding device of resistance certainly of plate includes: three axis numerically controlled machine, forming tool, plate fixture, DC source, wire, insulation spacer, temperature sensor, temperature controller and couveuse;It is characterized in that:
Described three axis numerically controlled machine is the motion driving mechanism into apparatus for converting, including: digital control system, the servomotor in tri-directions of X, Y, Z, leading screw and machine tool chief axis, make machine tool chief axis do Three Degree Of Freedom translational motion;
Described forming tool is connected with machine tool chief axis, does three direction translational motions along the track set under the drive of machine tool chief axis, and extrudes plate and make plate constantly be locally deformed with;
Described plate fixture comprises two energising fixtures and two plain clamps, energising fixture and plain clamp is alternate is in the layout of plate surrounding, makes plate surrounding and plate support platform and is relatively fixed;
Described DC source provides the low-tension current of the highest 36V, and its maximum output current should be not less than 200A, and for providing electric current to make plate produce Joule heat to plate, and low pressure ensures the safety of operator;
Described wire one end connects power supply, and the other end is connected with energising fixture by binding post, and source current is transferred to plate;
Described insulation spacer is arranged on plate and plate supports between platform, is used for making to insulate between plate and lathe, and insulation spacer uses high temperature insulating material;
Described temperature sensor is used for measuring plate temperature, the position being in the layout of on plate between fixture and machining area;
The temperature data that described temperature controller collecting temperature sensor records, and contrast with the temperature data set, adjusted amount is also transferred to DC source, makes DC source regulate output and then regulate plate heating-up temperature, it is achieved temperature scaling factor;
Described couveuse is used for reducing heat loss, the heating region of couveuse parcel plate, and upper end has opening to make forming tool not contact with couveuse when processing plate, and couveuse is made up of heat-preservation cotton and supporting construction.
2. plate according to claim 1 is overall from resistance heating progressive molding device, it is characterised in that: described plate is overall is constituted current loop from resistance heating progressive molding device by power supply, wire, plate fixture and plate.
3. plate according to claim 1 is overall from resistance heating progressive molding device, it is characterised in that: described plate entirety is processed for titanium alloy, magnesium alloy progressive molding from resistance heating progressive molding device.
4. plate according to claim 1 is overall from resistance heating progressive molding device, it is characterised in that: described temperature sensor is contact thermocouple or Infrared Thermocouple formula sensor.
5. plate according to claim 1 is overall from resistance heating progressive molding device, it is characterised in that: insulation spacer is Muscovitum.
6. plate according to claim 1 is overall from resistance heating progressive molding device, it is characterised in that: insulating between described energising fixture and plain clamp, two energising fixtures connect DC power anode and negative pole respectively, make plate be energized.
CN201610210109.7A 2016-04-06 2016-04-06 Plate is overall from resistance heating progressive molding device Active CN105710205B (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106425314A (en) * 2016-11-15 2017-02-22 北京航空航天大学 Combined manufacturing method of titanium alloy curvature component with ribs
CN107030219A (en) * 2017-05-26 2017-08-11 西安理工大学 A kind of plate progressive molding automatic clamping device
CN108273903A (en) * 2016-12-29 2018-07-13 福特全球技术公司 Utilize the method and apparatus of the contact pilotage progressive molding prototype part of heating
CN108380743A (en) * 2018-04-25 2018-08-10 武汉理工大学 A kind of multi-function device of plate progressive molding
CN108480924A (en) * 2018-03-19 2018-09-04 成都飞机工业(集团)有限责任公司 A kind of forming method and molding machine of double panel structure part
CN108723137A (en) * 2017-04-18 2018-11-02 中国商用飞机有限责任公司 A kind of differential temperature stretch wrap forming method from resistance heating aluminium lithium alloy proximate matter
CN109249118A (en) * 2018-08-21 2019-01-22 上海交通大学 Laminated plate based on electric resistance welding synchronizes compound two point progressive molding device and method
CN109622770A (en) * 2018-12-20 2019-04-16 上海交通大学 A kind of titanium-alloy thin-plate electricity auxiliary subsection progressive molding device and method
CN111069439A (en) * 2019-11-28 2020-04-28 北京卫星制造厂有限公司 Self-resistance heating incremental forming device and forming method
CN111250597A (en) * 2020-01-20 2020-06-09 山东科技大学 Electric heating smooth incremental forming device for magnesium alloy thin-wall part
CN112317608A (en) * 2020-11-12 2021-02-05 南京航空航天大学 Self-resistance electric heating incremental forming temperature real-time control system and method

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CN105013939A (en) * 2015-06-17 2015-11-04 武汉理工大学 Stirring friction forming device and technology based on self heating
CN105107933A (en) * 2015-07-13 2015-12-02 山东大学(威海) Electroplastic incremental forming device for plate and working method thereof

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KR20110124557A (en) * 2010-05-11 2011-11-17 한국과학기술원 Forming method of metal alloy sheet with low formability using incremental forming process with external heat sources
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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106425314A (en) * 2016-11-15 2017-02-22 北京航空航天大学 Combined manufacturing method of titanium alloy curvature component with ribs
CN108273903A (en) * 2016-12-29 2018-07-13 福特全球技术公司 Utilize the method and apparatus of the contact pilotage progressive molding prototype part of heating
CN108723137A (en) * 2017-04-18 2018-11-02 中国商用飞机有限责任公司 A kind of differential temperature stretch wrap forming method from resistance heating aluminium lithium alloy proximate matter
CN107030219B (en) * 2017-05-26 2018-11-27 西安理工大学 A kind of plate progressive molding automatic clamping device
CN107030219A (en) * 2017-05-26 2017-08-11 西安理工大学 A kind of plate progressive molding automatic clamping device
CN108480924A (en) * 2018-03-19 2018-09-04 成都飞机工业(集团)有限责任公司 A kind of forming method and molding machine of double panel structure part
CN108380743A (en) * 2018-04-25 2018-08-10 武汉理工大学 A kind of multi-function device of plate progressive molding
CN109249118B (en) * 2018-08-21 2020-03-17 上海交通大学 Laminated plate synchronous composite double-point progressive forming device and method based on resistance welding
CN109249118A (en) * 2018-08-21 2019-01-22 上海交通大学 Laminated plate based on electric resistance welding synchronizes compound two point progressive molding device and method
CN109622770A (en) * 2018-12-20 2019-04-16 上海交通大学 A kind of titanium-alloy thin-plate electricity auxiliary subsection progressive molding device and method
CN111069439A (en) * 2019-11-28 2020-04-28 北京卫星制造厂有限公司 Self-resistance heating incremental forming device and forming method
CN111069439B (en) * 2019-11-28 2021-09-07 北京卫星制造厂有限公司 Self-resistance heating incremental forming device and forming method
CN111250597A (en) * 2020-01-20 2020-06-09 山东科技大学 Electric heating smooth incremental forming device for magnesium alloy thin-wall part
CN112317608A (en) * 2020-11-12 2021-02-05 南京航空航天大学 Self-resistance electric heating incremental forming temperature real-time control system and method
CN112317608B (en) * 2020-11-12 2021-09-24 南京航空航天大学 Self-resistance electric heating incremental forming temperature real-time control system

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