CN102229044A - Wide magnesium alloy ultra-thin plate continuous extrusion device and method - Google Patents
Wide magnesium alloy ultra-thin plate continuous extrusion device and method Download PDFInfo
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- CN102229044A CN102229044A CN2011101164293A CN201110116429A CN102229044A CN 102229044 A CN102229044 A CN 102229044A CN 2011101164293 A CN2011101164293 A CN 2011101164293A CN 201110116429 A CN201110116429 A CN 201110116429A CN 102229044 A CN102229044 A CN 102229044A
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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
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/06—Making sheets
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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
- B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
- B21C35/02—Removing or drawing-off work
- B21C35/023—Work treatment directly following extrusion, e.g. further deformation or surface treatment
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Abstract
The invention discloses a wide magnesium alloy ultra-thin plate continuous extrusion device, which comprises an extrusion device, a continuous rolling plate device and a leveling device, wherein the extrusion device comprises an extrusion barrel and a W-shaped extrusion female die; a W-shaped gap is formed on the W-shaped extrusion female die; the continuous rolling plate device consists of a plurality of groups of rolling plate transfer rollers; each group of rolling plate transfer rollers consist of an upper rolling plate roller and a lower rolling plate roller; a W-shaped protrusion is formed on the upper rolling plate roller; a W-shaped groove is formed on the lower rolling plate roller; the leveling device consists of a plurality of groups of leveling rollers; each group of leveling rollers consist of an upper leveling roller and a lower leveling roller; the upper leveling roller and the lower leveling roller are cylindrical; the continuous rolling plate device is positioned between the extrusion device and the leveling device; and rolling surface curves tend to be flat in turn. Due to a continuous extrusion, rolling plate, leveling or continuous extrusion, rolling plate, rolling, leveling and rolling process, a magnesium alloy ultra-thin plate is continuously deformed and molded at one time, and the plate has bright and clean surface and dense internal structure.
Description
Technical field
The invention belongs to metal material and non-ferrous metal plastic working field, relate to a kind of device that can make the wide cut magnesium alloy ultrathin sheet material by extruding, rolling plate or continuous rolling one-shot forming, also relate to the crowded rolling method that utilizes this device.
Background technology
The high performance structures material is the important substance basis of supporting communications and transportation, energy source and power, resource environment, electronic information, agricultural and fields such as building, space flight and aviation and national Important Project, is one of at present most hotly competitive in the world high-tech sector new material.Magnesium is the lightest metal in the present most widely used structural metallic material, not only have in light weight, specific strength and specific stiffness height, damping vibration attenuation is good, electromagnetic wave shielding is strong, and machinable and recuperability are strong, are called as " green " engineering material of 21 century.Therefore magnesium and magnesium alloy are the most potential light metals at present, be the best substitution material of aluminium alloy and plastic material or expensive carbon fibre composite, the application in automobile, Aero-Space, war industry and portable electronic products more and more receives engineers and technicians' concern.In recent years, worldwide the annual growth of magnesium alloy has demonstrated great application prospect up to 20%, and the application of magnesium and alloy material thereof has become irreversible trend.
At present the most potential with regard to magnesium alloy civil applications field is application in portable electronic products and automobile.According to estimates, the demand of Global Mobile Phone and MP3, MP4 and notebook computer etc. surpasses more than 1,000,000 weekly, magnesium alloy not only can alleviate the weight of mobile product, the more important thing is that magnesium alloy shell can realize the most effective shielding to radio wave, this is that plastics, aluminium alloy, stainless steel and the carbon fibre composite etc. that use at present are incomparable.Along with the energy scarcity and the requirement on environmental protection of global range, the lightweight of automobile has become the inexorable trend of world wide automobile industry development, and the effect of magnesium alloy in automobile loss of weight, performance raising and environmental protection comes into one's own day by day.In recent years, developed country and the regional inputs that all strengthened the development and the application study of magnesium alloy such as U.S., moral, Japan, Israel, Australia have successively been implemented the Mg Alloy Research plan, are intended to the research and development industrial planning of magnesium alloy product.
Yet because magnesium is hcp close-packed hexagonal crystal structure, slip system is few, so temperature-room type plasticity processing difficulties, the difficult forming of magnesium alloy.Present magnesium alloy parts more than 90% adopt die casting and semisolid extrusion forming technology, the magnesium alloy of these methods processing exists normal temperature and mechanical behavior under high temperature poor mostly, the room temperature percentage elongation is low, can not can satisfy room temperature or middle warm extrusion pressure, punching press, forging, plastic molding method such as rolling as steel plate or aluminium sheet, make it on using, be subjected to certain restriction.
At present, generally can only produce the AZ series of 2mm and above thickness or ZK series wrought magnesium alloy sheet material by hot rolling or pressing method, defectives such as crackle usually appear in magnesium alloy plate edge and top layer, and presentation quality is bad.Because the plastic deformation ability of magnesium alloy is relatively poor, crackle appears in sheet material inside easily in temperature, hot rolling system and smoothing process in addition.Usually this class magnesium alloy sheet is not suitable for follow-up deformation at room temperature processing.Can only the thick wrought magnesium alloy AZ31B sheet material of casting 2-3mm as document [Feng Kang, Zhao Hongyang " heat processing technique " 2007, (36) 8:5-8 " homogenizing annealing process of double-roller rolling AZ31B magnesium alloy sheet "] employing double-roller rolling.Document [is opened blue or green next, king's grain grain, Zhang Shihong, Dai Qixun, Wang Zhongtang " metal heat treatmet " 2006, (31) 9:5-9 " preparation of AZ31 magnesium alloy sheet and the research of its microstructure and property "] adopt semi-continuous casting to obtain magnesium alloy rod, again by big ratio extrusion thinning microstructure, prepare the thin plate of all thickness, obtain the thin grained magnesium alloy sheet of average grain size＜5um again by unidirectional and tandem rolling.Although can obtain the thick thin plate of 0.7mm and since hot extrude when being shaped squeezing pressure limited, can not produce long thin plate, and the width of thin plate also is subjected to severely restricts, can not produce the thin plate of big wide cut.Patent [ZL200810030665.1, the forming method of magnesium alloy ultrathin sheet material] a kind of forming method that can prepare 0.1 * 500 * 500 (mm) disclosed, but must be through transverse rolling-axial rolling transverse rolling axial rolling operation again and again again and again, and be aided with intermediate annealing and eliminate work hardening, finally can only prepare the thick sheet material of 1mm, also needing then through deflection repeatedly only is 5% cold rolling and intermediate annealing process.Although can obtain the sheet material of 0.1 * 500 * 500 (mm), complex process, the moulding difficulty is higher, and cost is higher.
As seen, thickness is that 2mm is with lower thin sheet class magnesium alloy, especially the following preparation of plates of 1mm is difficult especially, this has limited application relatively low to the pi of strength requirement and portable electronic products field that processability is had relatively high expectations, has also limited the application in traffic, communication and national defense industry field.But press for thickness in producing is the following magnesium alloy sheet sheet material of 1mm, through be used to make the shell of 3C Product after the plastic workings such as cold stamping again behind surface treatment or composite PVC etc., gives full play to the most effective electromagnetic shielding of magnesium alloy and lightweight effect.
In sum and data-searching, have not yet to see extruding, roll over plate or the device of wide cut magnesium alloy ultrathin sheet material and the report of process are made in the continuous rolling one-shot forming.
Summary of the invention
The purpose of this invention is to provide a kind of wide cut magnesium alloy ultrathin sheet material and squeeze rolling device continuously, it is poor to solve existing magnesium alloy materials temperature-room type plasticity, can not be directly problem by the cold deformation moulding, the present invention is by the ultra-thin magnesium alloy plate of continuously extruded plastic deformation processing and preparing low cost, wide cut, and the extruding cost is low, efficient is high.
Another object of the present invention provides the crowded rolling method of said apparatus.
The technical solution adopted in the present invention is: a kind of wide cut magnesium alloy ultrathin sheet material squeezes rolling device continuously, comprises pressurizing unit, rolles over panel assembly and leveling apparatus continuously; Pressurizing unit comprises the extruding bucket and is arranged on " W " type Extruding die of extruding barrel bottom, the inwall of extruding bucket and " W " type Extruding die formation mold cavity, and " W " type Extruding die is provided with " W " type crack; Also be provided with heater on the extruding bucket; Roll over continuously panel assembly and roll over the plate transfer rollers by many groups and forms, every group roll over the plate transfer roller by last rolling plate roller and down rolling plate roller form, on roll over the plate roller and be provided with " W " type projection, following rolling plate roller is provided with " W " type groove corresponding with " W " type convex shape; Leveling apparatus is made up of many groups straightener roll, and every group of straightener roll is made up of last straightener roll and following straightener roll, and last straightener roll and following straightener roll are cylinder type; Roll over panel assembly continuously between pressurizing unit and leveling apparatus, roll over the plate transfer roller for many groups between from the pressurizing unit to the leveling apparatus, " W " type " W " type subtended angle protruding and " W " type groove of rolling on the plate transfer roller increases successively, and the roll surface curve tends towards stability successively; First group of roll surface curve of rolling over the plate transfer roller near pressurizing unit is consistent with the curve in " W " type crack of " W " type Extruding die.
Wherein, " W " type crack is made up of the enlarging that sets gradually from top to down, extrusion slot and discharging opening, and the three communicates; Wherein the open angle θ of enlarging is 60 °～90 °, and the width b of extrusion slot is 0.5～2 mm, and the height h of extrusion slot is 1～2 times of extrusion slot width b, and the width B of discharging opening is 2～3 times of extrusion slot width b.
Wherein, the heater of extruding bucket outer wall setting is a resistance heating body, in the extruding bucket wall thermocouple A is set; Be provided with thermocouple B in " W " type Extruding die.
Wherein, rolling over the upward rolling plate roller of plate transfer roller and the slit amount minimum between the following rolling plate roller is 0.05mm; Slit amount minimum between the last straightener roll of straightener roll and the following straightener roll is 0.05mm.
Another technical scheme of the present invention is to utilize the above-mentioned rolling device that squeezes continuously to carry out the crowded continuously method of rolling of wide cut magnesium alloy ultrathin sheet material:
(1), utilize heater to add hot extrusion bucket and " W " type Extruding die, make that the extrusion temperature in the mold cavity reaches 150 ℃ ~ 350 ℃;
Simultaneously, magnesium alloy blank to be extruded is preheated to 150 ℃ ~ 350 ℃, packs into then by in the mold cavity that pushes bucket inwall and " W " type Extruding die formation;
(2), keeping extrusion temperature is 150 ℃ ~ 350 ℃, the starting pressure machine, forcing press is by pressure ram extrusion magnesium alloy blank, and " W " type crack that the magnesium alloy blank that is extruded is passed on " W " type Extruding die promptly is squeezed into " W " type magnesium alloy sheet band of cross section for " W " type;
(3), roll over the plate transfer roller with every group and all be preheated to 150 ℃ ~ 350 ℃, then " W " type magnesium alloy sheet band is sent to continuous rolling panel assembly, successively by many groups roll over the plate transfer rollers to " W " type magnesium alloy sheet band clamping roll over the plate processing;
(4), every group of straightener roll all is preheated to 150 ℃ ~ 350 ℃, " W " type magnesium alloy sheet band that will roll over then after plate is handled is sent to leveling apparatus, " W " type magnesium alloy sheet band is planished smooths processing by organize straightener rolls more successively;
" W " type magnesium alloy sheet band becomes the dull and stereotyped light sheet of magnesium alloy through organize after the rolling plate of rolling over plate transfer rollers and many group straightener rolls is handled with smoothing more.
Wherein, roll over panel assembly continuously and be made up of three groups of rolling plate transfer rollers, leveling apparatus is made up of two groups of straightener rolls.
In the above-mentioned steps (three), when three groups of rolling plate transfer rollers clamp " W " type magnesium alloy sheet band, near first group of fast 1-10% of extrusion linear speed that rolles over plate transfer roller roll surface speed than " W " type magnesium alloy sheet band of pressurizing unit; Roll over the fast 1-5% of linear velocity of " W " type magnesium alloy sheet band of plate transfer roller roll surface speed for second group in the middle of being positioned at; The 3rd group of fast 1-5% of linear velocity that rolles over plate transfer roller roll surface speed than " W " type magnesium alloy sheet band near leveling apparatus.
In the above-mentioned steps (four), when two groups of straightener rolls planish " W " type magnesium alloy sheet band, near rolling over the linear velocity fast 1-5% of first group of straightener roll roll surface speed of panel assembly than " W " type magnesium alloy sheet band continuously, second group of straightener roll roll surface speed is than first group of fast 1-5% of straightener roll roll surface speed.
Its feature further is, in the step (three), rolling over plate transfer roller and the 3rd group at second group rolles over the plate transfer roller " W " type magnesium alloy sheet band is rolled over plate when handling, " W " type magnesium alloy sheet band is rolled when compressing " W " type magnesium alloy sheet band by the slit of rolling over the plate roller in the drive unit adjustment and roll over down between the plate roller, rolling reduction is controlled at 10-30%; In the step (four), near first group of straightener roll of rolling over continuously panel assembly to " W " type magnesium alloy sheet band planish smooth processing after, " W " type magnesium alloy sheet band is planished into the dull and stereotyped sheet material of magnesium alloy, when second group of straightener roll smoothed processing to the dull and stereotyped sheet material of magnesium alloy, the dull and stereotyped sheet material of magnesium alloy is rolled when compressing the dull and stereotyped sheet material of magnesium alloy by the slit between straightener roll in the drive unit adjustment and the following straightener roll, rolling reduction is controlled at 10-30%.
Its feature further is, the dull and stereotyped light sheet of magnesium alloy after smoothing is handled through step (four) is rolled into thinner light sheet by one or more groups roll rolling.
The invention has the beneficial effects as follows, " W " type of employing Extruding die, be extruded material can obtain wide cut by " W " type crack in limited extruding cross section sheet material, reduced of the requirement of conventional extruding wide plate to equipment, and simplified extrusion process, reduce production costs spreading and the smoothing of organizing straightener rolls of " W " template material that extruding is come out by repeatedly rolling over the plate roller more, can obtain the straight ultra-thin sheet material of wide cut, having solved wide plate can not be by the problem of extruding preparation; Utilize crowded rolling device provided by the invention and crowded rolling method can prepare thickness and be the dull and stereotyped sheet material of the magnesium alloy of 0.05mm-2mm, the dull and stereotyped sheet material of the magnesium alloy that utilizes the present invention to prepare can be used for the rolling again and cold deformation processing under the room temperature condition, process as straight formings such as punching press, forging and pressing, applicable surface is extremely wide, can directly apply to the preparation of advanced 3C Product shell, also can be used for industries such as automobile, Aero-Space, and can energy savings, reduce production costs; In addition, utilize magnesium alloy ultrathin plate sheet material that the present invention prepares after plastic workings such as cold, warm, drop stamping, behind surface treatment or composite PVC etc., to can be used for making the shell of 3C Product again, give full play to the most effective electromagnetic shielding of magnesium alloy and lightweight effect.
Description of drawings
Fig. 1 is the structural representation that the present invention squeezes pressurizing unit in the rolling device;
Fig. 2 is the structural representation that the present invention squeezes " W " type Extruding die in the rolling device;
Fig. 3 is the A-A cutaway view of Fig. 2;
Fig. 4 is that the present invention rolles over first group of structural representation of rolling over the plate transfer roller in the panel assembly continuously;
Fig. 5 is that the present invention rolles over second group of structural representation of rolling over the plate transfer roller in the panel assembly continuously;
Fig. 6 is that the present invention rolles over the 3rd group of structural representation of rolling over the plate transfer roller in the panel assembly continuously;
Fig. 7 is the structural representation of straightener roll in the leveling apparatus of the present invention;
Fig. 8 is that the present invention squeezes rolling device carries out continuously extruded rolling plate to magnesium alloy plate structural representation.
Among the figure, 1. pressure ram 2. pushes bucket, 3. resistance heating body, 4. thermocouple A, 5. " W " type Extruding die, 6. thermocouple B, 7. " W " type magnesium alloy sheet band, 8. magnesium alloy blank, 9. " W " type crack, 10. enlarging, 11. extrusion slots, 12. discharging opening is rolled over the plate roller on 13., rolles over the plate rollers 14. times, " 15. W " type projection, 16. " W " type groove, straightener roll on 17., 18. following straightener roll, the dull and stereotyped sheet material of 19. magnesium alloys, the dull and stereotyped light sheet of 20. magnesium alloys.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
The invention provides a kind of wide cut magnesium alloy ultrathin sheet material and squeeze rolling device continuously, comprise pressurizing unit, roll over panel assembly and leveling apparatus continuously, roll over panel assembly continuously between pressurizing unit and leveling apparatus.
As shown in Figure 1, pressurizing unit comprises extruding bucket 2 and is arranged on " W " type Extruding die 5 of extruding bucket 2 bottoms that extruding bucket 2 inwalls and " W " type Extruding die 5 constitute mold cavity, are used to place magnesium alloy blank 8 to be extruded.As shown in Figure 2, " W " type Extruding die 5 is provided with " W " type crack 9, and as shown in Figure 3, " W " type crack 9 is made up of the enlarging 10 that sets gradually from top to down, extrusion slot 11 and discharging opening 12, and the three communicates; Enlarging 10 open angle θ are 60 °～90 °, and the width b of extrusion slot 11 is 0.5～2mm, and the height h of extrusion slot 11 is 1～2 times of extrusion slot 11 width b, and the width B of discharging opening 12 is 2～3 times of extrusion slot 11 width b; By changing " W " type Extruding die 5 of difference " W " type crack 9 sizes, just can push the sheet material of different-thickness.Extruding bucket 2 outer walls are provided with resistance heating body 3, by to resistance heating body 3 energising heating, make the extrusion temperature of pressurizing unit mold cavity reach 450 ℃ from room temperature and satisfy the hot extrusion requirement.Insert thermocouple A4 in the wall of extruding bucket 2, the temperature regulating device of thermocouple A4 and resistance heating body 3 constitutes control loop, is used for the variations in temperature of monitoring and control extrusion process extruding bucket 2 and " W " type Extruding die 5; Insert thermocouple B6 in " W " type Extruding die 5, be used for the variations in temperature at monitoring and control 9 places, extrusion process " W " type crack.
Rolling over panel assembly continuously is made up of many groups of rolling plate transfer rollers, rolling over the plate transfer roller for every group is made up of last rolling plate roller 13 and the following plate roller 14 of rolling over, last rolling plate roller 13 is provided with " W " type projection 15, and following rolling plate roller 14 is provided with and corresponding " W " type groove 16 of " W " type projection 15 shapes.Under to roll over plate roller 14 fixing, roll surface can only and can not move up and down with the rotation synchronously of last rolling plate roller 13, last rolling plate roller 13 is by hydraulic pressure or feed screw nut Mechanical Driven, not only roll surface can rotate, and can move up and down, be used to adjust slit between the up-down rollers compressing magnesium alloy plate and belt, slit amount minimum is 0.05mm.Roll over the plate transfer roller with continuous rolling panel assembly by three groups and consist of example, as shown in Figure 4, consistent with the curve in " W " type crack 9 of " W " type Extruding die 5 near first group of roll surface curve of rolling over the plate transfer roller of pressurizing unit.As shown in Figure 5, second group of rolling plate transfer roller roll surface curve is milder than first group of rolling plate transfer roller roll surface curve, that is to say that " W " type projection 15 of second group of rolling plate transfer roller and the subtended angle of " W " type groove 16 are bigger with the subtended angle of " W " type groove 16 than first group of " W " type protruding 15 of rolling over the plate transfer roller; As shown in Figure 6, the 3rd group of rolling plate transfer roller roll surface curve near leveling apparatus is milder than second group of rolling plate transfer roller roll surface curve, that is to say that " W " type projection 15 of the 3rd group of rolling plate transfer roller and the subtended angle of " W " type groove 16 are bigger with the subtended angle of " W " type groove 16 than second group of " W " type protruding 15 of rolling over the plate transfer roller.
As shown in Figure 7, leveling apparatus is made up of many groups straightener roll, and every group of straightener roll comprises straightener roll 17 and following straightener roll 18, and last straightener roll 17 and following straightener roll 18 are cylinder type, and its roll surface is a plain-barreled roll.Following straightener roll 18 is fixed, roll surface can only and can not move up and down with the rotation synchronously of last straightener roll 17, last straightener roll 17 is by hydraulic pressure or feed screw nut Mechanical Driven, not only roll surface can rotate, and can move up and down, be used to adjust slit between the up-down rollers compressing magnesium alloy plate and belt, slit amount minimum is 0.05mm.
As shown in Figure 8, rolling over the plate transfer roller with continuous rolling panel assembly by three groups below forms, it is example that the present invention that leveling apparatus is made up of two groups of straightener rolls squeezes rolling device continuously, utilizes this device to carry out the wide cut magnesium alloy ultrathin sheet material and squeezes the method for rolling continuously, and its concrete operations step is as follows:
(1), utilize the resistance heating body 3 be arranged at extruding bucket 2 outer walls to add hot extrusion bucket 2 and " W " type Extruding die 5, make that the extrusion temperature in the mold cavity reaches 150 ℃ ~ 350 ℃;
Simultaneously, magnesium alloy blank 8 to be extruded is incubated 2 ~ 24 hours carries out homogenising heat treatment under 150 ℃ ~ 350 ℃ conditions, this alloy pig oxide skin is removed in processing then, and it is to be extruded to be cut into pieces; Then section shape magnesium alloy blank 8 is packed into rapidly in the mold cavity that constitutes by extruding bucket 2 inwalls and W type Extruding die 5.
(2), keeping extrusion temperature is 150 ℃ ~ 350 ℃, the starting pressure machine, forcing press makes magnesium alloy blank 8 pass " W " type Extruding die 5 middle " W " type cracks 9 and promptly is squeezed into " W " type magnesium alloy sheet band 7 of cross section for " W " type by pressure ram 1 downward extrusion magnesium alloy blank 8; Its concrete extrusion process is: magnesium alloy blank 8 is extruded in extrusion slot 11 by enlarging 10, thickness by " W " type magnesium alloy sheet band 7 after the width b restriction extruding of extrusion slot 11, so, just can change the thickness of extruding back sheet material by changing the size of extrusion slot 11 width b.Because the width B of discharging opening 12 is wideer than the width b of extrusion slot 11, " W " type magnesium alloy sheet band 7 that is extruded moulding is by discharging opening 12 dischargings.
(3), open first group and roll over the plate transfer roller, " W " type magnesium alloy sheet band 7 that squeezes out is imported the going up of first group of rolling plate transfer roller of adopting resistance or flame to be preheated to 150 ℃ ~ 350 ℃ rapidly rolles over plate roller 13 and rolles between the plate roller 14 down, depress then and roll over plate roller 13, make first group to roll over plate transfer roller clamping " W " type magnesium alloy sheet band 7, roll over the fast 1-10% of extrusion linear speed of " W " type magnesium alloy sheet band 7 of plate transfer roller roll surface speed for first group, its purpose is stretching " W " type magnesium alloy sheet band 7.Roll over the plate transfer roller for first group and do not play a part to launch magnesium alloy plate, only be used for location and alignment.
(4), open second group and roll over the plate transfer roller, to adopt resistance or flame to be preheated to second group of upward rolling plate roller 13 and following rolling between the plate roller 14 of rolling over the plate transfer roller of 150 ℃ ~ 350 ℃ through first group of stretching " W " type magnesium alloy sheet band 7 rapid importing of rolling plate transfer roller, depress then and roll over plate roller 13, make second group to roll over plate transfer roller clamping " W " type magnesium alloy sheet band 7.Because the upward rolling plate roller 13 of second group of rolling plate transfer roller is with rolling plate roller 14 roll surfaces are milder than first group of rolling plate transfer roller down, the subtended angle of its " W " type projection 15 and " W " type groove 16 is bigger, therefore " W " type magnesium alloy strip 7 becomes mild, the width widen of sheet material after rolling over the plate transfer roller through second group.Second group of fast 1-5% of linear velocity that rolles over the roll surface speed of plate transfer roller than " W " type magnesium alloy sheet band 7, its purpose is stretching " W " type magnesium alloy sheet band 7.
Certainly, can also be by adjusting the slit between the up-down rollers, make second group of slit between the rolling plate transfer roller up-down rollers less than first group of slit of rolling between the plate transfer roller up-down rollers, but the slit amount is not less than 0.05mm, guarantee that rolling over the plate transfer roller for second group also is rolled it when compressing " W " type magnesium alloy strip 7, rolling reduction is controlled at 10-30%.
(5), open the 3rd group and roll over the plate transfer roller, to adopt resistance or flame to be preheated to 150 ℃ ~ 350 ℃ the 3rd group of upward rolling plate roller 13 and following the rolling between the plate roller 14 of rolling over the plate transfer roller through second group of stretching " W " type magnesium alloy sheet band 7 rapid importing of rolling plate transfer roller, depress then and roll over plate roller 13, make the 3rd group to roll over plate transfer roller clamping " W " type magnesium alloy sheet band 7.Because the upward rolling plate roller 13 of the 3rd group of rolling plate transfer roller is with rolling plate roller 14 roll surfaces are milder than second group of rolling plate transfer roller down, the subtended angle of its " W " type projection 15 and " W " type groove 16 is bigger, therefore " W " type magnesium alloy strip 7 becomes mild after rolling over the plate transfer roller through the 3rd group of W type, and the width of sheet material is widened once more.The 3rd group of fast 1-5% of linear velocity that rolles over the roll surface speed of plate transfer roller than " W " type magnesium alloy sheet band 7, its purpose is the magnesium alloy sheet band 7 of stretching W type.
Certainly, can also be by adjusting the slit between the up-down rollers, make the 3rd group of slit between the rolling plate transfer roller up-down rollers less than first group of slit of rolling between the plate transfer roller up-down rollers, but the slit amount is not less than 0.05mm, guarantee that rolling over the plate transfer roller for the 3rd group also is rolled it when compressing " W " type magnesium alloy strip 7, rolling reduction is controlled at 10-30%.
(6), open first group of straightener roll, to roll over stretching " W " type magnesium alloy sheet band of plate transfer roller 7 through the 3rd group imports rapidly and adopts resistance or flame to be preheated between 150 ℃ ~ 350 ℃ the last straightener roll 17 and following straightener roll 18 of first group of straightener roll, depress straightener roll 17 then, make first group of straightener roll clamp " W " type magnesium alloy sheet band 7.Because the last straightener roll 17 and following straightener roll 18 roll surfaces of first group of straightener roll are straight, therefore making " W " type magnesium alloy strip 7 roll over the sheet material width that becomes mild behind the plate transfer roller through three groups widens once more, for dull and stereotyped, become the dull and stereotyped sheet material 19 of magnesium alloy by the smoothing of " W " type.The roll surface speed of first group of straightener roll is the fast 1-5% of linear velocity of " W " type magnesium alloy sheet band 7, and its purpose is stretching " W " type magnesium alloy sheet band 7.
(7), open second group of straightener roll, to planish the dull and stereotyped sheet material 19 of stretching magnesium alloy through first group of straightener roll imports rapidly and adopts resistance or flame to be preheated between 150 ℃ ~ 350 ℃ the last straightener roll 17 and following straightener roll 18 of second group of straightener roll, depress straightener roll 17 then, make the dull and stereotyped sheet material 19 of the magnesium alloy of second group of straightener roll clamping after first group of straightener roll smoothing.Because it is straight that the last straightener roll 17 and the following straightener roll 18 of second group of straightener roll and first group of straightener roll are, therefore " W " type magnesium alloy strip 7 becomes flat board through being smoothed by " W " type behind two groups of straightener rolls.Second group of straightener roll mainly acts on and is to planish through first group of straightener roll and the further smoothing and the finishing of the dull and stereotyped sheet material 19 of magnesium alloy of alignment, makes the magnesium alloy plate after the smoothing more smooth, becomes the dull and stereotyped light sheet 20 of magnesium alloy.The roll surface speed of second group of straightener roll is than the fast 1-5% of the roll surface speed of first group of straightener roll, and its purpose is the dull and stereotyped sheet material 19 of the magnesium alloy after the further stretching smoothing.Meanwhile, can also be by adjusting the slit between the up-down rollers, make second group of slit between the straightener roll up-down rollers less than the slit between first group of straightener roll up-down rollers, but the slit amount is not less than 0.05mm, guarantee that promptly second group of straightener roll also carries out continuous rolling and finishing to it when compressing the dull and stereotyped sheet material of magnesium alloy 19, make magnesium alloy wide plate thickness evenly straight, rolling reduction is controlled at 10-30%.
" W " type magnesium alloy sheet band 7 becomes the dull and stereotyped light sheet 20 of magnesium alloy after through the smoothing of three groups of rolling plates of rolling over the plate transfer rollers and two groups of straightener rolls and finishing, behind two groups of straightener rolls, one or more groups roll can also be set, the dull and stereotyped light sheet 20 of magnesium alloy can be rolled into thinner light sheet, magnesium alloy thin sheet material prepares the back just can carry out fixed length cutting as required or directly carry out roll bending, realizes the dull and stereotyped supply of material or the rolling supply of material.
In the above-mentioned technical process, the top roll that second group and the 3rd group are rolled over plate transfer roller and second group of straightener roll all can be depressed a certain amount of, is carrying out continuous rolling when rolling over plate and smoothing continuously, realizes continuously extruded, continuously roll over plate, smooth and continuous rolling continuously.Three groups of W type rolling plate transfer rollers and two groups of straightener rolls all adopt resistance or flame to be preheated to 150 ℃ ~ 350 ℃, and the spreading and the smoothing that are beneficial to material are not ftractureed.
Utilize the ultra-thin strip material of dull and stereotyped magnesium alloy wide cut of apparatus and method preparation provided by the invention, its thickness is 0.05～2mm, the strip material of fabric width 〉=600mm, and under the room temperature condition, tensile strength
σ b: 200～260MPa, yield strength
σ 0.2: 190～240MPa, percentage elongation δ 〉=20%, density≤2.2g/cm
3, satisfy the cold worked user demand of distressed structure spare room temperature.
Compact conformation of the present invention is reasonable, the thinking novelty since adopted continuously extruded, roll over plate, smoothing or continuously extruded, roll over plate, rolling and smoothing and rolling mill practice, make that the ultra-thin sheet material of magnesium alloy can one-time continuous distortion moulding, realized that magnesium alloy ultrathin sheet material is by technology one-shot formings such as extruding, plate surface is bright and clean, and dense internal organization is because continuous modification and crystallization again, organize anisotropy difference little, and whole system is safe in utilization, and is easy to operate, the production efficiency height.
Claims (10)
1. a wide cut magnesium alloy ultrathin sheet material squeezes rolling device continuously, it is characterized in that: comprise pressurizing unit, roll over panel assembly and leveling apparatus continuously; Described pressurizing unit comprises extruding bucket (2) and is arranged on " W " type Extruding die (5) of extruding bucket (2) bottom, the inwall of extruding bucket (2) and " W " type Extruding die (5) constitute mold cavity, and " W " type Extruding die (5) is provided with " W " type crack (9); Also be provided with heater on the extruding bucket (2); Described continuous rolling panel assembly is rolled over the plate transfer roller by many groups and is formed, rolling over the plate transfer roller for every group is made up of last rolling plate roller (13) and the following plate roller (14) of rolling over, last rolling plate roller (13) is provided with " W " type projection (15), and following rolling plate roller (14) is provided with " W " type groove (16) corresponding with " W " type projection (15) shape; Described leveling apparatus is made up of many groups straightener roll, and every group of straightener roll is made up of last straightener roll (17) and following straightener roll (18), and last straightener roll (17) and following straightener roll (18) are cylinder type; Described continuous rolling panel assembly is between pressurizing unit and leveling apparatus, roll over the plate transfer roller for many groups between from the pressurizing unit to the leveling apparatus, " W " type projection (15) on the rolling plate transfer roller and " W " type subtended angle of " W " type groove (16) increase successively, and the roll surface curve tends towards stability successively; First group of roll surface curve of rolling over the plate transfer roller near pressurizing unit is consistent with the curve in " W " type crack (9) of " W " type Extruding die (5).
2. the rolling device that squeezes continuously according to claim 1, it is characterized in that: described " W " type crack (9) is made up of the enlarging that sets gradually from top to down (10), extrusion slot (11) and discharging opening (12), and the three communicates; The open angle θ of wherein enlarging (10) is 60 °～90 °, the width b of extrusion slot (11) is 0.5～2 mm, the height h of extrusion slot (11) is 1～2 times of extrusion slot (11) width b, and the width B of discharging opening (12) is 2～3 times of extrusion slot (11) width b.
3. the rolling device that squeezes continuously according to claim 1 is characterized in that: the heater of described extruding bucket (2) outer wall setting is resistance heating body (3), in extruding bucket (2) wall thermocouple A(4 is set); Be provided with thermocouple B(6 in " W " type Extruding die (5)).
4. the rolling device that squeezes continuously according to claim 1 is characterized in that: the slit amount minimum of upward rolling over plate roller (13) and rolling over down between the plate roller (14) of described rolling plate transfer roller is 0.05mm; The last straightener roll (17) of described straightener roll and the amount minimum of the slit between the following straightener roll (18) are 0.05mm.
5. one kind is utilized the described rolling device that squeezes continuously of claim 1 to carry out the crowded continuously method of rolling of wide cut magnesium alloy ultrathin sheet material, it is characterized in that:
The structure that should squeeze continuously rolling device be: comprise pressurizing unit, roll over panel assembly and leveling apparatus continuously; Described pressurizing unit comprises extruding bucket (2) and is arranged on " W " type Extruding die (5) of extruding bucket (2) bottom, the inwall of extruding bucket (2) and " W " type Extruding die (5) constitute mold cavity, and " W " type Extruding die (5) is provided with " W " type crack (9); Also be provided with heater on the extruding bucket (2); Described continuous rolling panel assembly is rolled over the plate transfer roller by many groups and is formed, rolling over the plate transfer roller for every group is made up of last rolling plate roller (13) and the following plate roller (14) of rolling over, last rolling plate roller (13) is provided with " W " type projection (15), and following rolling plate roller (13) is provided with " W " type groove (16) corresponding with " W " type projection (15) shape; Described leveling apparatus is made up of many groups straightener roll, and every group of straightener roll is made up of last straightener roll (17) and following straightener roll (18), and last straightener roll (17) and following straightener roll (18) are cylinder type; Described continuous rolling panel assembly is between pressurizing unit and leveling apparatus, roll over the plate transfer roller for many groups between from the pressurizing unit to the leveling apparatus, " W " type projection (15) on the rolling plate transfer roller and " W " type subtended angle of " W " type groove (16) increase successively, and the roll surface curve tends towards stability successively; First group of roll surface curve of rolling over the plate transfer roller near pressurizing unit is consistent with the curve in " W " type crack (9) of " W " type Extruding die (5);
Utilize said apparatus, carry out the wide cut magnesium alloy ultrathin sheet material and squeeze continuously the method for rolling and be,
(1), utilize heater to add hot extrusion bucket (2) and " W " type Extruding die (5), make that the extrusion temperature in the mold cavity reaches 150 ℃ ~ 350 ℃;
Simultaneously, magnesium alloy blank (8) to be extruded is preheated to 150 ℃ ~ 350 ℃, packs into then by in the mold cavity that pushes bucket (2) inwall and " W " type Extruding die (5) formation;
(2), keeping extrusion temperature is 150 ℃ ~ 350 ℃, the starting pressure machine, forcing press is by pressure ram (1) extrusion magnesium alloy blank (8), and " W " type crack (9) that the magnesium alloy blank (8) that is extruded is passed on " W " type Extruding die (5) promptly is squeezed into " W " type magnesium alloy sheet band (7) of cross section for " W " type;
(3), roll over the plate transfer roller with every group and all be preheated to 150 ℃ ~ 350 ℃, then " W " type magnesium alloy sheet band (7) is sent to continuous rolling panel assembly, by many group rolling plate transfer rollers " W " type magnesium alloy sheet band (7) is clamped successively and roll over the plate processing;
(4), every group of straightener roll all is preheated to 150 ℃ ~ 350 ℃, " W " type magnesium alloy sheet band (7) that to roll over then after plate is handled is sent to leveling apparatus, by many group straightener rolls " W " type magnesium alloy sheet band (7) is planished successively and smooths processing;
" W " type magnesium alloy sheet band (7) becomes the dull and stereotyped light sheet (20) of magnesium alloy through too much organizing after the rolling plate of rolling over plate transfer roller and many group straightener rolls is handled with smoothing.
6. magnesium alloy ultrathin sheet material according to claim 5 squeezes rolling method continuously, it is characterized in that: described continuous rolling panel assembly is made up of three groups of rolling plate transfer rollers, and leveling apparatus is made up of two groups of straightener rolls.
7. magnesium alloy ultrathin sheet material according to claim 6 squeezes rolling method continuously, it is characterized in that: in the described step (three), when three groups of rolling plate transfer rollers clamp " W " type magnesium alloy sheet band (7), near first group of fast 1-10% of extrusion linear speed that rolles over plate transfer roller roll surface speed than " W " type magnesium alloy sheet band (7) of pressurizing unit; Roll over the fast 1-5% of linear velocity of " W " type magnesium alloy sheet band (7) of plate transfer roller roll surface speed for second group in the middle of being positioned at; The 3rd group of fast 1-5% of linear velocity that rolles over plate transfer roller roll surface speed than " W " type magnesium alloy sheet band (7) near leveling apparatus.
8. magnesium alloy ultrathin sheet material according to claim 6 squeezes rolling method continuously, it is characterized in that: in the described step (four), two groups of straightener rolls are to " W " type magnesium alloy sheet band (7) when planishing, near rolling over the linear velocity fast 1-5% of first group of straightener roll roll surface speed of panel assembly than " W " type magnesium alloy sheet band (7) continuously, second group of straightener roll roll surface speed is than first group of fast 1-5% of straightener roll roll surface speed.
9. magnesium alloy ultrathin sheet material according to claim 6 squeezes rolling method continuously, it is characterized in that: in the described step (three), rolling over plate transfer roller and the 3rd group at second group rolles over the plate transfer roller " W " type magnesium alloy sheet band (7) is rolled over plate when handling, by roll in the drive unit adjustment plate roller (13) and down the slit between the rolling plate roller (14) " W " type magnesium alloy sheet band (7) is rolled when compressing " W " type magnesium alloy sheet band (7), rolling reduction is controlled at 10-30%; In the described step (four), near first group of straightener roll of rolling over continuously panel assembly to " W " type magnesium alloy sheet band (7) planish smooth processing after, " W " type magnesium alloy sheet band (7) is planished into the dull and stereotyped sheet material (19) of magnesium alloy, when second group of straightener roll smoothed processing to the dull and stereotyped sheet material of magnesium alloy (19), the dull and stereotyped sheet material of magnesium alloy (19) is rolled when compressing the dull and stereotyped sheet material of magnesium alloy (19) by the slit between straightener roll (17) in the drive unit adjustment and the following straightener roll (18), rolling reduction is controlled at 10-30%.
10. magnesium alloy ultrathin sheet material according to claim 5 squeezes rolling method continuously, it is characterized in that: the dull and stereotyped light sheet of magnesium alloy (20) after smoothing is handled through step (four) is rolled into thinner light sheet by one or more groups roll rolling.
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| CN102430608A (en) * | 2011-12-08 | 2012-05-02 | 李跃华 | Equipment and process for producing arc-shaped magnesium alloy plates |
| CN102489958A (en) * | 2011-12-08 | 2012-06-13 | 李跃华 | Process and equipment for manufacturing wide-width magnesium alloy plate in coils |
| CN106956140A (en) * | 2017-05-02 | 2017-07-18 | 青岛正泰物流器械有限公司 | The processing method and its process equipment of a kind of tooth row pipe |
| CN108817114A (en) * | 2018-04-17 | 2018-11-16 | 河南明镁镁业科技有限公司 | A kind of low cost improves the preparation method of magnesium alloy wide-width |
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| CN110369542A (en) * | 2019-08-14 | 2019-10-25 | 江苏大学 | A kind of continuous expanding extruding mold |
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| CN114905290A (en) * | 2022-05-18 | 2022-08-16 | 河南郾漯粮食机械有限公司 | Cold rolling device for producing side plate of grain conveyor |
| CN114905290B (en) * | 2022-05-18 | 2024-01-26 | 河南郾漯粮食机械有限公司 | Cold rolling device for producing side plates of grain conveyor |
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