CN105710205B - Plate is overall from resistance heating progressive molding device - Google Patents
Plate is overall from resistance heating progressive molding device Download PDFInfo
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- CN105710205B CN105710205B CN201610210109.7A CN201610210109A CN105710205B CN 105710205 B CN105710205 B CN 105710205B CN 201610210109 A CN201610210109 A CN 201610210109A CN 105710205 B CN105710205 B CN 105710205B
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- plate
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Classifications
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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
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/005—Incremental shaping or bending, e.g. stepwise moving a shaping tool along the surface of the workpiece
-
- 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
-
- 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
- B21D43/00—Feeding, 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
- B21D43/003—Positioning devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
A kind of plate of the present invention 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 incubator；The building mortion power supply, wire, plate fixture and plate constitute current loop, and plate temperature is raised by Joule heat；In plate two ends galvanization, plate integrally heats up, and thermograde is small；Semiclosed incubator is installed, heat is reduced and scatters and disappears, improve energy utilization rate；With temperature sensor measurement plate temperature, and pass through the accurate control panel material temperature degree of closed-loop control.The 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 normal temperature and normal temperature.
Description
【Technical field】
It is overall from resistance heating progressive molding device the present invention relates to a kind of plate, belong to plate progressive molding process technology neck
Domain.
【Background technology】
The technology commonly used in traditional sheet forming is mould punching shaping, due to production efficiency height, forming quality
The advantages of high and consumable material is few, is relatively adapted to produce single type part in enormous quantities, master is occupied for a long time in modern industry production
Lead status.
With the progress in epoch, to product the need for tend to personalized and noveltyization, this requires that enterprise must be constantly to oneself
Body product is updated the replacement, just can occupy one seat in fierce market competition.Traditional moulds stamp forming technology mould
Have construction cycle length, capital expenditure higher, enterprise can not have been met and has carried out multi items, the requirement of be pilot Development and Production.
Sheet material progressive molding technique is a kind of technique shaped without particular manufacturing craft, and its basic thought is the shape according to part
Shape, plans shaping track, develops the control program of Digit Control Machine Tool, using the feed system of Digit Control Machine Tool, make shaping
Instrument is moved by the track of design, and the continuous extruding of forming tool and plate makes plate progressively shape, and is finally shaped required
Shape.This manufacturing process does not need special shaping dies, thus Operational preparation is fast, cost is low, is particularly suitable for small quantities of
Amount, multi items, the production of complex parts.
Although progressive molding technology has greater advantage and wide application prospect, also there are some non-negligible to ask
Topic, such as forming accuracy is poor, processing efficiency is relatively low and less stable.In addition, progressive molding device rigidity is poor,
When the higher sheet material of fabrication strength, often because plastic force is excessive and caused by forming tool deformation, cause forming quality to decline,
Even can not normally it be shaped when serious.
For problem above, domestic and foreign scholars have carried out the research of hot progressive molding, by heating can improve plate into
Shape performance, reduces the requirement to the rigidity of machine tool, improves forming accuracy, increases the formable angle of part, and can also shape normal temperature
Titanium alloy, the magnesium alloy parts that can not be shaped.Heating means include laser heating, the local heating of resistance certainly, electric heating stove heat, rotation
Frictionally heat.
Laser heating method has the advantages that firing rate is fast, but hot spot is continually changing with the change of Working position, is deposited
The problem of difficulty is big is being controlled, and laser equipment cost is very high.
The local heating means equipment cost of resistance certainly is low, firing rate is fast.But there is also some shortcomings, including：Electric current passes through
Forming tool is high to forming tool performance requirement；Heating region is continually changing, and temperature is difficult measurement and control；Lubricating oil is in plate
It is that in current loop, lubricating oil electric conductivity is had higher requirements between material and forming tool；Easily there is electric spark etc..
Electrothermal furnace heating means heating-up temperature is uniform, temperature is easily controllable, but equipment design is complicated, and is not suitable for two point
Progressive molding.
Spin friction heating means are to provide a very high rotating speed to forming tool, pass through rubbing for forming tool and plate
Wipe and produce heat.This method reduces main axis stiffness due to rotary freedom, and high-speed friction influence panel surface matter
Amount.
The present invention proposes that a kind of plate is overall from resistance heating progressive molding device, and the device has local from resistance heating simultaneously
The advantages of equipment cost of method is low, firing rate is fast and electric heating stove heat plate temperature is uniform, temperature is easily controllable.And
Current loop is stable, will not produce electric spark；Lubricant does not influence current loop, reduces the requirement to lubricant.
【The content of the invention】
The purpose of the present invention is the problem of presently, there are for the hot progressive molding equipment of plate, to propose that one kind is simple in construction,
Easy to use, safe, shaping scope is wide, and the high plate of machining accuracy is overall from resistance heating progressive molding device.The technology may be used also
For difficult shaping under the big slab progressive molding processing of plastic force under normal temperature and normal temperature titanium alloy, magnesium alloy sheet it is progressive into
Shape is processed.
A kind of plate is overall from resistance heating progressive molding device, including：Three axis numerically controlled machine, forming tool, plate fixture,
Dc source, wire, insulation spacer, temperature sensor, temperature controller and incubator；
The building mortion power supply, wire, plate fixture and plate constitute current loop, make plate temperature by Joule heat
Degree rise；In plate two ends galvanization, plate integrally heats up, and thermograde is small；Semiclosed incubator is installed, heat is reduced and dissipates
Lose, improve energy utilization rate；With temperature sensor measurement plate temperature, and pass through the accurate control panel material temperature degree of closed-loop control.
The three axis numerically controlled machine is the motion driving mechanism of progressive molding device, including：Digital control system, X, Y, Z tri-
Servomotor, leading screw, the machine tool chief axis in individual direction etc., can make machine tool chief axis do Three Degree Of Freedom translational motion；
The forming tool is connected with machine tool chief axis, and three axles translation fortune is done in the track set in the drive lower edge of machine tool chief axis
It is dynamic, and extruding plate makes plate constantly be locally deformed with；
The plate fixture includes two energization fixtures and two plain clamps, energization fixture and the alternate layout of plain clamp
In plate surrounding, plate surrounding is relatively fixed with plate supporting table, insulated between energization fixture and plain clamp, wherein, two
Individual energization fixture connects DC power anode and negative pole respectively, plate is powered；
The dc source can provide highest 36V low-tension current, and its maximum output current should be not less than 200A, use
It is set to produce Joule heat in providing electric current to plate, and low pressure can ensure the safety of operating personnel；
Described wire one end connects power supply, and the other end is connected with energization fixture by binding post, source current is transferred to
Plate；
The insulation spacer is arranged between plate and plate supporting table, for making to insulate between plate and lathe, insulation
Pad uses high temperature insulating material such as mica；
The temperature sensor is used for measurement plate material temperature degree, can be contact thermocouple or Infrared Thermocouple, be in the layout of
Position between plate upper fixture and machining area；
The temperature data that the temperature controller can be measured with collecting temperature sensor, and carried out with the temperature data of setting
Contrast, adjusted amount is simultaneously transferred to dc source, dc source is adjusted power output and then adjusts plate heating-up temperature, real
Existing temperature scaling factor；
The incubator, which is used to reducing heat, to be scattered and disappeared, and plate is easily reached a high temperature and is saved the energy, incubator encapsulation plate
The heating region of material, and upper end has opening forming tool is not contacted when processing plate with incubator, incubator is by heat-preservation cotton
Constituted with supporting construction.
The plate is overall to be applied to the larger slab progressive molding processing of normal temperature plastic force from resistance heating progressive molding device,
Requirement of the technique to the rigidity of machine tool is reduced, such as titanium alloy, magnesium alloy progressive molding are processed.When the supporting plate of support plate is fixed
When can realize single-point progressive molding；When the supporting plate of support plate can realize two point gradually when vertically guide pillar is moved freely
Enter shaping.
Advantage and beneficial effect of the present invention are：
(1) apparatus structure is simple, and cost is low, and heat temperature raising is fast.
(2) current loop contact is stable, is not in electric spark.
(3) plate is integrally heated, and thermograde is small.
(4) semiclosed incubator is provided with, energy utilization rate is high.
(5) plate temperature is easily measured, it is easy to accomplish temperature scaling factor.
(6) sheet metal formability is improved, the shaping angular region of material is increased.
(7) residual stress of plate is reduced, part resilience is reduced, forming accuracy is improved.
(8) progressive molding of the plates such as titanium alloy, the magnesium alloy of normal temperature hardly possible shaping is solved the problems, such as.
(9) when solving processing slab the problem of lathe insufficient rigidity.
(10) while suitable for single-point progressive molding and two point progressive molding.
【Brief description of the drawings】
Fig. 1 is that plate is overall from resistance heating progressive molding device two point shaping schematic diagram.
Fig. 2 is that plate is overall from resistance heating progressive molding device single-point shaping schematic diagram.
Fig. 3 is that plate is overall from resistance heating progressive molding device plate clamping schematic diagram.
Label title in figure：
1 plate supporting table, 2 forming tools, 3 shaping dies, 4 plates,
5 high-temperature insulation pads, 6 energization 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 incubators, 16 workbench.
【Embodiment】
Device is by three axis numerically controlled machine, forming tool, plate fixture, power supply, wire, insulation spacer, temperature sensor, temperature
Spend the composition such as controller, incubator.Track of the main shaft clamping forming tool of three axis numerically controlled machine along setting is moved, and sends out plate
Raw continuous local deformation, ultimately generates required part.Device power supply, wire, plate fixture and plate constitute electric current and returned
Road, is reliably insulated in loop with lathe with high-temperature insulation pad.By 0-36V, 200-1000A low-voltage, high-current is produced
Raw Joule heat raises plate temperature.
Illustrate that plate is overall from resistance heating progressive molding two point shaping by taking accompanying drawing 1 as an example.
Three-dimensional part model is set up with CAD software, then with CAM Software Create numerical control codes, and numerical control code is imported
Digit Control Machine Tool.
Raise plate supporting table 1 and arrive highest point and fixation, shaping dies 3 is arranged on workbench 16.Open numerical control machine
Bed is carried out to knife, to withdrawing after the completion of knife to home.
The plate 4 of suitable dimension is cut out, here, plate 4 is equal in the middle of plate supporting table 1 for square and its length of side to be opened
If the length of square hole add twice of the width of energization fixture 6.Plate 4 is placed in plate supporting table 1, wherein plate branch
Support and the high-temperature insulation pad 5 that mica makes is placed between platform 1 and plate 4.As shown in Figure 3, energization fixture 6 and plain clamp
12 alternate are placed on the surrounding of plate 4 and fixation.Energization fixture 6 is connected with dc source 11 by binding post 8 and wire 10, made
Dc source 11, wire 10, binding post 8, energization fixture 6, the composition current loop of plate 4.
Plate supporting table 1 is unclamped, it is landed under deadweight state and causes the contact force support plate branch of mould 3 and plate 4
Support platform 1.Open dc source 11 to switch, begin to warm up plate 4, numerical control code is run after plate 4 reaches design temperature and is carried out
Digital control processing, for titanium alloy plate set temperature at 500 DEG C or so.
In process the measurement plate material temperature degree of temperature sensor 9 and pass through controller 13 control dc source 11 output
Electric current adjusts the temperature of plate 4, finally realizes the temperature scaling factor of plate 4, and plate 4 at high temperature realizes overall softening.
Forming tool 2 is lifted after machining, and closes dc source 11, part is removed after temperature is reduced to room temperature.
Illustrate that plate is overall from resistance heating progressive molding single-point shaping by taking accompanying drawing 2 as an example.
Three-dimensional part model is set up with CAD software, then with CAM Software Create numerical control codes, and numerical control code is imported
Digit Control Machine Tool.
Raise plate supporting table 1 and arrive highest point and fixation.Open Digit Control Machine Tool to carry out to knife, to withdrawing after the completion of knife to peace
All positon.
The plate 4 of suitable dimension is cut out, here, plate is equal in the middle of plate supporting table 1 for square and its length of side to be opened up
The length of square hole add twice of the width of energization fixture 6.Plate 4 is placed in plate supporting table 1, wherein plate is supported
The high-temperature insulation pad 5 that mica makes is placed between platform 1 and plate 4.As shown in Figure 3, energization fixture 6 and plain clamp 12
It is alternate to be placed on the surrounding of plate 4 and fixation.Energization fixture 6 is connected with dc source 11 by binding post 8 and wire 10, made straight
Flow power supply 11, wire 10, binding post 8, energization fixture 6, the composition current loop of plate 4.
Open dc source 11 to switch, begin to warm up plate 4, numerical control code is run after plate 4 reaches design temperature and is entered
Row digital control processing, for titanium alloy plate set temperature at 500 DEG C or so.
In process the measurement plate material temperature degree of temperature sensor 9 and pass through controller 13 control dc source 11 output
Electric current adjusts the temperature of plate 4, finally realizes the temperature scaling factor of plate 4, and plate 4 at high temperature realizes overall softening.
Forming tool 2 is lifted after machining, and closes dc source 11, part is removed after temperature is reduced to room temperature.
Claims (6)
1. a kind of plate is overall from resistance heating progressive molding device, including：It is three axis numerically controlled machine, forming tool, plate fixture, straight
Flow power supply, wire, insulation spacer, temperature sensor, temperature controller and incubator；It is characterized in that：
The three axis numerically controlled machine is the motion driving mechanism of progressive molding device, including：Digital control system, tri- directions of X, Y, Z
Servomotor, leading screw and machine tool chief axis, machine tool chief axis is done Three Degree Of Freedom translational motion；
The forming tool is connected with machine tool chief axis, and three direction translation fortune are done in the track set in the drive lower edge of machine tool chief axis
It is dynamic, and extruding plate makes plate constantly be locally deformed with；
The plate fixture includes two energization fixtures and two plain clamps, energization fixture and plain clamp is alternate is in the layout of plate
Expect surrounding, plate surrounding is relatively fixed with plate supporting table；
The dc source provides highest 36V low-tension current, and its maximum output current should be not less than 200A, for being carried to plate
Power supply stream makes plate produce Joule heat, and low pressure ensures the safety of operating personnel；
Described wire one end connects power supply, and the other end is connected by binding post with energization fixture, and source current is transferred into plate；
The insulation spacer is arranged between plate and plate supporting table, for making to insulate between plate and lathe, insulation spacer
Use high temperature insulating material；
The temperature sensor is used for measurement plate material temperature degree, is in the layout of the position between plate upper fixture and machining area；
The temperature data that the temperature controller collecting temperature sensor is measured, and contrasted with the temperature data of setting, obtain
To regulated quantity and dc source is transferred to, dc source is adjusted power output and then adjust plate heating-up temperature, realize temperature
Closed-loop control；
The incubator scatters and disappears for reducing heat, and incubator wraps up the heating region of plate, and upper end has opening to make shaping work
Tool is not contacted when processing plate with incubator, and incubator is made up of heat-preservation cotton with supporting construction.
2. plate according to claim 1 is overall from resistance heating progressive molding device, it is characterised in that：The plate is overall
Current loop is constituted by power supply, wire, plate fixture and plate from resistance heating progressive molding device.
3. plate according to claim 1 is overall from resistance heating progressive molding device, it is characterised in that：The plate is overall
It is used to titanium alloy, magnesium alloy progressive molding from resistance heating progressive molding device process.
4. plate according to claim 1 is overall from resistance heating progressive molding device, it is characterised in that：The TEMP
Device 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 cloud
It is female.
6. plate according to claim 1 is overall from resistance heating progressive molding device, it is characterised in that：The energization fixture
Insulated between plain clamp, two energization fixtures connect DC power anode and negative pole, plate is powered respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610210109.7A CN105710205B (en) | 2016-04-06 | 2016-04-06 | Plate is overall from resistance heating progressive molding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610210109.7A CN105710205B (en) | 2016-04-06 | 2016-04-06 | Plate is overall from resistance heating progressive molding device |
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| Publication Number | Publication Date |
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| CN105710205A CN105710205A (en) | 2016-06-29 |
| CN105710205B true CN105710205B (en) | 2017-09-05 |
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| CN101318203A (en) * | 2008-06-24 | 2008-12-10 | 南京航空航天大学 | Electrical heating numerical control incremental forming processing method and device for plate |
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| CN105013939B (en) * | 2015-06-17 | 2017-05-17 | 武汉理工大学 | Stirring friction forming device and technology based on self heating |
| CN105107933B (en) * | 2015-07-13 | 2017-03-01 | 山东大学（威海） | Plate Electroplastic progressive molding device and its method of work |
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