CN104841761A - Alloy plate electromagnetic punching and flanging forming method and device - Google Patents
Alloy plate electromagnetic punching and flanging forming method and device Download PDFInfo
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- CN104841761A CN104841761A CN201510198931.1A CN201510198931A CN104841761A CN 104841761 A CN104841761 A CN 104841761A CN 201510198931 A CN201510198931 A CN 201510198931A CN 104841761 A CN104841761 A CN 104841761A
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Abstract
The invention relates to an alloy plate electromagnetic punching and flanging forming method. The alloy plate electromagnetic punching and flanging forming method includes the first step of installing a flat plate spiral coil assembly, the second step of installing a blank, the third step of conducting discharging punching forming, the fourth step of conducting discharging flanging forming, and the fifth step of taking out a formed part. The invention further relates to an alloy plate electromagnetic punching and flanging forming device. An adopted electromagnetic forming tool is simple, no male die needs to be manufactured, and the problems caused by a fit clearance between a female die and the male die are solved. The forming process is completed instantly, ductility and forming limit of materials can be improved, and the problem that cracks are generated in the flanging process can be well solved. Besides, positioning problems caused by die change during multi-procedure forming in existing electromagnetic forming technologies are solved, the problem that cost is increased due to die disassembling and assembling is solved, and production efficiency is greatly improved.
Description
Technical field
The present invention relates to a kind of alloy sheets electromagnetism piercing and flanging manufacturing process and device.
Background technology
Punching press is modal manufacture process technology, usually utilizes punch die on forcing press, to apply pressure to material, the processing method making it be separated or be out of shape.Due in punch process, clearance between punch and die is very little, mode transfer difficulty, and the friction of punch and die side and material increases, die change, location difficulty during multiple operation, reduces die life, adds cost.Simultaneously, carplane lightweight becomes the development trend of futurity industry gradually, lightweight, the difficult moulding materials such as aluminium alloy, high-strength steel and composite increase day by day in the application in the advanced manufacture field such as automobile, space flight and aviation, and the processing and manufacturing of these materials proposes acid test to conventional ones technique.The room temperature formability of aluminium alloy is poor, conventional ones technique is adopted to be difficult to the complicated part that is shaped, easily break at drawing fillet and flanging bore edge, and forming quality is unstable, forming limit is low, these govern the development of conventional ones technology all greatly.
Therefore, lot of domestic and foreign scholar starts to try to explore new Sheet Metal Forming Technology in conventional ones technique, because electro-magnetic forming loading speed is fast, forming accuracy high-technology advantage, researcher has started electromagnetic forming technique to be used for Plastic Forming, as proposed a kind of electromagnetic drive forming method and device in patent CN102248693A, the method adopts pulse-electromagnetic force to drive drift to accelerate, drift striking work, the pad pasting completing workpiece and die is shaped, but its rigidity drift adds manufacturing cost, easy scratch workpiece, affect the forming quality of workpiece, carry out multi-position furnace simultaneously, press device more mold exchange need be pulled down, reduce forming efficiency, and do not relate to the orientation problem of workpiece, a kind of light alloy housing drip molding magnetic pulse formation device and method is proposed in patent CN103341546A, electric discharge shaping realizes the pad pasting shaping of light alloy housing drip molding fillet at twice, but it is multistep shaping, and need the bolt of dismounting mould, screw and upper mounted plate, assemble again with mold exchange and coil, reduce its forming efficiency, add the cost of manufacture.
Totally it seems, conventional ones technique also exists a lot of deficiency, has been difficult to the forming requirements meeting existing light material.Although electromagnetic forming technique has started to be applied in Plastic Forming, the problems such as when also there is multiple operation, die change efficiency is low, location is difficult will solve.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of alloy sheets electromagnetism piercing and flanging manufacturing process and the device that building mortion improves craft flexibility simply, greatly.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of alloy sheets electromagnetism piercing and flanging manufacturing process, comprises the following steps:
(1) dull and stereotyped spiral winding group is installed: the dull and stereotyped spiral winding group being first provided with to provide electromagnetic repulsive force at the detent internal fixtion of base, connect with discharge control switch through Capacitor banks in positive and negative the two poles of the earth of described dull and stereotyped spiral winding group, described Capacitor banks is in parallel with power supply, outside described dull and stereotyped spiral winding group, be arranged with counterdie;
(2) blank is installed: then blank is placed in the precalculated position on counterdie, then patrix is laid, blank clamping is located by the drawing bend utilizing described counterdie upper surface to arrange, and the die of patrix of being spliced by punching mould core is installed in through hole, and be tightened by bolts, base, counterdie and patrix are fastenedly connected by last clamping screw nut assembly;
(3) discharge piercing and shaping die: power supply charges to Capacitor banks, charge circuit is disconnected after charging, then closed discharge control switch, Capacitor banks discharges to dull and stereotyped spiral winding group, after high-strength pulse-current flows through dull and stereotyped spiral winding group, instantaneous strong magnetic field is produced in dull and stereotyped spiral winding group, and produce inductive loop in blank surface, and then produce the eddy current magnetism contrary with instantaneous strong magnetic field direction of rotation, the magnetic force that two magnetic field produces repels mutually, and promote blank and move upward and to have an effect with the rectangular-shaped cutting edge of punching mould core, complete blank piercing and shaping die, whole process is instantaneous to be completed,
(4) discharge flanging forming: pull down the bolt on punching mould core, take off punching mould core, change flange die, then described in same step (3), described electromagnetic repulsive force promotes blank and moves upward and fit with the curved edge of flange die, complete blank flanging forming, whole process is instantaneous to be completed;
(5) take out drip molding: the nut unclamping bolt and nut component, take off flange die, patrix successively, the piercing and flanging drip molding obtained.
A kind of alloy sheets electromagnetism piercing and flanging building mortion, comprise fastening through bolt and nut component upper die and lower die and base from top to bottom, laterally blank is clamped between described patrix and counterdie, the stepped die of described patrix installs in through hole die of having spliced, dull and stereotyped spiral winding group is installed with in the annular cavity of described counterdie, connect with discharge control switch through Capacitor banks in positive and negative the two poles of the earth of described dull and stereotyped spiral winding group, described Capacitor banks is in parallel with power supply.
Further, described die is punching mould core or flange die.
Further, described punching mould core, flange die are all in tubular, and all its tubular outer circumferential side is provided with in order to install with die the shoulder that through hole matches; The rectangular shape of described punching mould core medial margin root cross section is to form the endoporus of piercing and flanging drip molding, and the big up and small down taper in described punching mould core medial margin top is beneficial to punched scrap and collects; Described flange die medial margin cross section is curved with the arc convex medial margin forming piercing and flanging drip molding.
Further, the splice die of patrix of described punching mould core or flange die is installed after in through hole, described punching mould core or flange die lower surface all concordant with the lower surface of patrix.
Further, the detent bearing dull and stereotyped spiral winding group is offered in the middle part of described base upper surface.
Further, described counterdie is provided with the drawing bend in order to clamping and positioning.
Further, described counterdie side opening is provided with the opening in order to dull and stereotyped spiral winding group positive and negative the two poles of the earth outlet.
Further, described dull and stereotyped spiral winding group comprises dull and stereotyped spiral winding, described dull and stereotyped spiral winding is wound around multiturn from the inside to surface by least one wire and forms, described dull and stereotyped spiral winding is placed in bakelite shell, between described dull and stereotyped spiral winding and bakelite shell and dull and stereotyped spiral winding outer surface be provided with insulating materials.
Further, described insulating materials is mixed by polyamide and epoxy resin, and the mass ratio of described polyamide and epoxy resin is 1:2.
Compared with prior art, the present invention has following beneficial effect: Electro Magnetic Forming technology is applied on the forming technology of blank piercing and flanging by the present invention, be mainly used on the forming technology of the piercing and flanging of aluminium horizontal plate, utilize electromagnetic force to drive sheet metal forming; The present invention is compared with conventional ones forming technology, and the electro-magnetic forming frock that the present invention adopts is simple, adopts single mould, does not need to process punch, avoids the problem that concave-convex mold fit clearance is brought; Forming process is instantaneous to be completed, and can improve ductility and the forming limit of material, can improve the generation of crackle in turn-up process; Instant invention overcomes the orientation problem that die change under existing electromagnetic forming technique multi-position furnace brings, the cost that dismounting mould causes increases; The present invention devises drawing bend between upper and lower mould, prevents the slip of blank, and lower of multiple operation need change die, without the need to pulling down mould, solving the problem that blank is reorientated, enhancing productivity, ensure workpiece quality.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
Accompanying drawing explanation
Fig. 1 is the unitary construction schematic diagram being provided with flange die of the embodiment of the present invention.
Fig. 2 is A portion enlarged drawing in Fig. 1 of the embodiment of the present invention.
Fig. 3 is the punching mould core cross-sectional schematic of the embodiment of the present invention.
Fig. 4 is the flange die cross-sectional schematic of the embodiment of the present invention.
Fig. 5 is the blank schematic diagram after the punching operation of the embodiment of the present invention.
Fig. 6 is the product schematic diagram after the overturning process of the embodiment of the present invention.
Fig. 7 is the generation electromagnetic repulsive force schematic diagram of the embodiment of the present invention.
In figure: 1-base, 11-detent, the dull and stereotyped spiral winding group of 2-, the dull and stereotyped spiral winding of 21-, 22-bakelite shell, 23-insulating materials, 3-counterdie, 31-drawing bend, 32-annular cavity, 33-opening, 4-blank, 5-patrix, 51-die installs through hole, 6-die, 61-punching mould core, the rectangular-shaped cutting edge of 611-, 62-flange die, 621-curved edge, 63-shoulder, 7-bolt, 8-bolt and nut component, 81-nut, C-Capacitor banks, K-discharge control switch.
Detailed description of the invention
As shown in Fig. 1 ~ 7, in the present invention, a kind of alloy sheets electromagnetism piercing and flanging manufacturing process, comprises the following steps:
(1) dull and stereotyped spiral winding group 2 is installed: the dull and stereotyped spiral winding group 2 being first provided with to provide electromagnetic repulsive force at detent 11 internal fixtion of base 1, connect with discharge control switch K through Capacitor banks C in positive and negative the two poles of the earth of described dull and stereotyped spiral winding group 2, described Capacitor banks C is in parallel with power supply, outside described dull and stereotyped spiral winding group 2, be arranged with counterdie 3;
(2) blank 4 is installed: then blank 4 is placed in the precalculated position on annular counterdie 3, selected blank 4 is aluminium alloy sheet preferably, then patrix 5 is laid, utilize drawing bend 31 that described counterdie 3 upper surface is arranged by blank 4 clamping and positioning, and the die of patrix 5 of being spliced by punching mould core 61 is installed in through hole 51, and lock with bolt 7, base 1, counterdie 3 and patrix 5 are fastenedly connected by last clamping screw nut assembly 8;
(3) discharge piercing and shaping die: power supply charges to Capacitor banks C, charge circuit is disconnected after charging, then closed discharge control switch K, Capacitor banks C discharges for 21 group 2 to dull and stereotyped spiral winding, after high-strength pulse-current flows through dull and stereotyped spiral winding group 2, instantaneous strong magnetic field is produced in dull and stereotyped spiral winding group 2, and produce inductive loop on blank 4 surface, and then produce the eddy current magnetism contrary with instantaneous strong magnetic field direction of rotation, the magnetic force that two magnetic field produces repels mutually, and promote blank 4 and move upward and to have an effect with the rectangular-shaped cutting edge 611 of punching mould core 61, complete blank 4 piercing and shaping die, whole process is instantaneous to be completed,
(4) discharge flanging forming: pull down the bolt 7 on punching mould core 61, take off punching mould core 61, change flange die 62, then described in same step (3), described electromagnetic repulsive force promotes blank 4 and moves upward and fit with the curved edge 621 of flange die 62, complete blank 4 flanging forming, whole process is instantaneous to be completed;
(5) take out drip molding: the nut 81 unclamping bolt and nut component 8, take off flange die 62, patrix 5 successively, the piercing and flanging drip molding obtained.
In the present invention, a kind of alloy sheets electromagnetism piercing and flanging building mortion, comprise fastening through bolt and nut component 8 patrix 5, counterdie 3 and base 1 from top to bottom, laterally blank 4 is clamped between described patrix 5 and counterdie 3, the stepped die of described patrix 5 installs in through hole 51 die 6 of having spliced, dull and stereotyped spiral winding group 2 is installed with in the annular cavity 32 of described counterdie 3, connect with discharge control switch K through Capacitor banks C in positive and negative the two poles of the earth of described dull and stereotyped spiral winding group 2, described Capacitor banks C is in parallel with power supply.
In the present invention, described die 6 is punching mould core 61 or flange die 62.
In the present invention, described punching mould core 61, flange die 62 are all in tubular, and all its tubular outer circumferential side is provided with in order to install with die the shoulder 63 that through hole 51 matches; The rectangular shape of described punching mould core 61 medial margin root cross section is to form the endoporus of piercing and flanging drip molding, and the big up and small down taper in described punching mould core 61 medial margin top is beneficial to punched scrap and collects; Described flange die 62 medial margin cross section is curved with the arc convex medial margin forming piercing and flanging drip molding.
In the present invention, the splice die of patrix 5 of described punching mould core 61 or flange die 62 is installed after in through hole 51, described punching mould core 61 or flange die 62 lower surface all concordant with the lower surface of patrix 5.
In the present invention, the detent 11 bearing dull and stereotyped spiral winding group 2 is offered in the middle part of described base 1 upper surface.
In the present invention, described detent 11, described annular cavity 32, die are installed through hole 51 and are all positioned on same axis.
In the present invention, described counterdie 3 is provided with the drawing bend 31 in order to clamping and positioning.
In the present invention, described counterdie 3 side opening is provided with the opening 33 in order to dull and stereotyped spiral winding group 2 positive and negative the two poles of the earth outlet.
In the present invention, described dull and stereotyped spiral winding group 2 comprises dull and stereotyped spiral winding 21, described dull and stereotyped spiral winding 21 is wound around multiturn from the inside to surface by least one flat red copper wire and forms, described dull and stereotyped spiral winding 21 is placed in bakelite shell 22, between described dull and stereotyped spiral winding 21 and bakelite shell 22 and dull and stereotyped spiral winding 21 outer surface be provided with insulating materials 23.
In the present invention, described insulating materials 23 is mixed by polyamide and epoxy resin, and the mass ratio of described polyamide and epoxy resin is 1:2.
In the present invention, adopt thick 1040 aluminium alloy plates of 1mm as turned blank 4, selection diameter is the punching mould core 61 of 60mm, according to above-mentioned embodiment installation; Utilize Capacitor banks C to discharge for 21 group 2 to dull and stereotyped spiral winding, discharge voltage is 3000V, completes piercing and shaping die, and its forming blank 4 as shown in Figure 5; Take off punching mould core 61, change the flange die 62 of diameter 80mm, then complete electric discharge flanging forming, take out the piercing and flanging workpiece of the 1mm thick aluminium alloy plate diameter 80mm be shaped, its Forming Workpiece as shown in Figure 6.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. an alloy sheets electromagnetism piercing and flanging manufacturing process, is characterized in that, comprise the following steps:
(1) dull and stereotyped spiral winding group is installed: the dull and stereotyped spiral winding group being first provided with to provide electromagnetic repulsive force at the detent internal fixtion of base, connect with discharge control switch through Capacitor banks in positive and negative the two poles of the earth of described dull and stereotyped spiral winding group, described Capacitor banks is in parallel with power supply, outside described dull and stereotyped spiral winding group, be arranged with counterdie;
(2) blank is installed: then blank is placed in the precalculated position on counterdie, lay patrix, blank clamping is located by the drawing bend utilizing described counterdie upper surface to arrange, and the die of patrix of being spliced by punching mould core is installed in through hole, and be tightened by bolts, base, counterdie and patrix are fastenedly connected by last clamping screw nut assembly;
(3) discharge piercing and shaping die: power supply charges to Capacitor banks, charge circuit is disconnected after charging, then closed discharge control switch, Capacitor banks discharges to dull and stereotyped spiral winding group, after high-strength pulse-current flows through dull and stereotyped spiral winding group, instantaneous strong magnetic field is produced in dull and stereotyped spiral winding group, and produce inductive loop in blank surface, and then produce the eddy current magnetism contrary with instantaneous strong magnetic field direction of rotation, the magnetic force that two magnetic field produces repels mutually, and promote blank and move upward and to have an effect with the rectangular-shaped cutting edge of punching mould core, complete blank piercing and shaping die, whole process is instantaneous to be completed,
(4) discharge flanging forming: pull down the bolt on punching mould core, take off punching mould core, change flange die, then described in same step (3), described electromagnetic repulsive force promotes blank and moves upward and fit with the curved edge of flange die, complete blank flanging forming, whole process is instantaneous to be completed;
(5) take out drip molding: the nut unclamping bolt and nut component, take off flange die, patrix successively, the piercing and flanging drip molding obtained.
2. an alloy sheets electromagnetism piercing and flanging building mortion, it is characterized in that: comprise fastening through bolt and nut component upper die and lower die and base from top to bottom, laterally blank is clamped between described patrix and counterdie, the stepped die of described patrix installs in through hole die of having spliced, dull and stereotyped spiral winding group is installed with in the annular cavity of described counterdie, connect with discharge control switch through Capacitor banks in positive and negative the two poles of the earth of described dull and stereotyped spiral winding group, described Capacitor banks is in parallel with power supply.
3. a kind of alloy sheets electromagnetism piercing and flanging building mortion according to claim 2, is characterized in that: described die is punching mould core or flange die.
4. a kind of alloy sheets electromagnetism piercing and flanging building mortion according to claim 3, is characterized in that: described punching mould core, flange die are all in tubular, and all its tubular outer circumferential side is provided with in order to install with die the shoulder that through hole matches; The rectangular shape of described punching mould core medial margin root cross section is to form the endoporus of piercing and flanging drip molding, and the big up and small down taper in described punching mould core medial margin top is beneficial to punched scrap and collects; Described flange die medial margin cross section is curved with the arc convex medial margin forming piercing and flanging drip molding.
5. a kind of alloy sheets electromagnetism piercing and flanging building mortion according to claim 4, it is characterized in that: the splice die of patrix of described punching mould core or flange die is installed after in through hole, described punching mould core or flange die lower surface all concordant with the lower surface of patrix.
6. a kind of alloy sheets electromagnetism piercing and flanging building mortion according to claim 5, is characterized in that: the detent offering to bear dull and stereotyped spiral winding group in the middle part of described base upper surface.
7. a kind of alloy sheets electromagnetism piercing and flanging building mortion according to claim 6, is characterized in that: described counterdie is provided with the drawing bend in order to clamping and positioning.
8. a kind of alloy sheets electromagnetism piercing and flanging building mortion according to claim 7, is characterized in that: described counterdie side opening is provided with the opening in order to dull and stereotyped spiral winding group positive and negative the two poles of the earth outlet.
9. a kind of alloy sheets electromagnetism piercing and flanging building mortion according to claim 8, it is characterized in that: described dull and stereotyped spiral winding group comprises dull and stereotyped spiral winding, described dull and stereotyped spiral winding is wound around multiturn from the inside to surface by least one wire and forms, described dull and stereotyped spiral winding is placed in bakelite shell, between described dull and stereotyped spiral winding and bakelite shell and dull and stereotyped spiral winding outer surface be provided with insulating materials.
10. a kind of alloy sheets electromagnetism piercing and flanging building mortion according to claim 9, it is characterized in that: described insulating materials is mixed by polyamide and epoxy resin, the mass ratio of described polyamide and epoxy resin is 1:2.
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| CN201510198931.1A CN104841761B (en) | 2015-04-24 | 2015-04-24 | A kind of alloy sheets electromagnetism piercing and flanging manufacturing process and device |
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| CN104841761B CN104841761B (en) | 2016-10-05 |
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| CN108405699A (en) * | 2018-04-02 | 2018-08-17 | 三峡大学 | A kind of the plate electromagnetism hemmer and method of vertical repulsive force-radial direction suction timesharing load |
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| CN110014068A (en) * | 2019-03-18 | 2019-07-16 | 华中科技大学 | A kind of electromagnetic cutting device and method based on collection chinaware |
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| CN110681760A (en) * | 2019-09-29 | 2020-01-14 | 华中科技大学 | Electromagnetic pulse hole flanging forming device for thick plate or thick arc-shaped part |
| CN110773623A (en) * | 2019-12-17 | 2020-02-11 | 哈工大机器人（岳阳）军民融合研究院 | Electromagnetic punching forming device |
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