CN108311543A - A kind of special-shaped roll, milling train and method for reducing magnesium alloy rolling side and splitting tendency - Google Patents
A kind of special-shaped roll, milling train and method for reducing magnesium alloy rolling side and splitting tendency Download PDFInfo
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- CN108311543A CN108311543A CN201810033887.2A CN201810033887A CN108311543A CN 108311543 A CN108311543 A CN 108311543A CN 201810033887 A CN201810033887 A CN 201810033887A CN 108311543 A CN108311543 A CN 108311543A
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- upper roller
- magnesium alloy
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- roll
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
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Abstract
The present invention provides a kind of special-shaped roll, milling train and method for reducing magnesium alloy rolling side and splitting tendency, belongs to the technical field of the Plastic Forming of nonferrous materials.Special-shaped roll includes the upper roller and lower roll of cylinder；The middle part surface of upper roller is circumferentially provided with upper roller protrusion；The horizontal sides of upper roller protrusion and vertical edge angle are 90o；The surface of lower roll is circumferentially provided with the lower roll groove that rolling space is formed with upper roller male cooperation；The horizontal sides of lower roll groove and vertical edge angle are 90o；There is the lateral fit clearance for making upper roller protrusion and lower roll groove coordinate at the lateral mating surface of upper roller protrusion and lower roll groove；There is the longitudinal fit clearance for making upper roller and lower roll longitudinally closely be pressed against at upper roller and longitudinal mating surface of lower roll.Magnesium alloy slab is placed in rolling space, during the rolling process, the laterally free extension of magnesium alloy slab is limited by the cell wall of lower roll groove, magnesium alloy plate rolled edge is reduced and splits tendency.
Description
Technical field
The present invention relates to the technical fields of the Plastic Forming of nonferrous materials, are rolled more particularly to a kind of reduction magnesium alloy
Split special-shaped roll, milling train and the method for tendency in side processed.
Background technology
Magnesium alloy plate has many advantages, such as light weight, excellent cutting performance, good capability of electromagnetic shielding, is widely used in navigating
The fields such as sky, space flight, electronics industry.Rolling is to prepare the main method of magnesium alloy plate, but magnesium alloy is in traditional operation of rolling
In be susceptible to side and split.It needs to carry out trimming processing while splitting part, reduces stock utilization, increases plank manufacturing cost,
Greatly limit the preparation and application of magnesium alloy plate.
Invention content
The present invention provides a kind of special-shaped roll, milling train and method for reducing magnesium alloy rolling side and splitting tendency, above-mentioned to improve
Technical problem.
The present invention provides a kind of special-shaped roll for reducing magnesium alloy rolling side and splitting tendency, including cylindrical upper roller is under
Roller；The middle part surface of upper roller is circumferentially provided with upper roller protrusion；The horizontal sides of upper roller protrusion and vertical edge angle are 90o；Under
The surface of roller is circumferentially provided with the lower roll groove that rolling space is formed with upper roller male cooperation；The horizontal sides of lower roll groove with
Vertical edge angle is 90o；Having at the lateral mating surface of upper roller protrusion and lower roll groove makes upper roller protrusion and lower roll groove coordinate
Lateral fit clearance；There is the longitudinal cooperation for making upper roller and lower roll longitudinally closely be pressed against at upper roller and longitudinal mating surface of lower roll
Gap.
Further, upper roller and lower roll are made of 9Cr2Mo materials；The surface roughness of upper roller protrusion and lower roll groove
It is 1.6 μm of Ra.
The present invention provides a kind of milling train, including above-mentioned special-shaped roll, the rack for installing special-shaped roll, is used to support machine
The pedestal of frame, the transmission device for adjusting screwdown gear, driving special-shaped roll rotation for roll reduction to be arranged are filled with transmission
Set the motor of connection and the control cabinet of the special-shaped roll rotation of control；Transmission device includes pinion stand, connection motor and pinion stand
Shaft coupling and connection special-shaped roll and pinion stand connecting shaft；Be provided on control cabinet milling train release the button, milling train open
Display lamp, rotational speed regulation button, speed display and milling train close button.
The present invention provides a kind of method for reducing magnesium alloy rolling side and splitting tendency, includes the following steps：
S1 will be preheated to 300 DEG C ~ 400 DEG C by pretreated magnesium alloy slab, keep the temperature 10~20 min；
S2, adjustment milling train rotating speed are 15~25 rpm, and roll reduction is 60~80%；
Magnesium alloy slab is placed in the rolling space of above-mentioned special-shaped roll and rolls magnesium alloy plate by S3.
Further, the pretreatment of magnesium alloy slab includes that each surface of magnesium alloy slab polishes flat.
Compared with prior art, advantage of the invention is that：
The present invention is susceptible to the problem of side is split for magnesium alloy plate in traditional operation of rolling, and transverse direction can be provided by devising
The special-shaped roll of extruding force, upper roller are provided with upper roller protrusion, and lower roll, which is provided with, to be formed with upper roller male cooperation under rolling space
Roller groove, magnesium alloy slab are placed in rolling space, during the rolling process, magnesium alloy slab are limited by the cell wall of lower roll groove
Laterally free extension split tendency to reduce magnesium alloy plate rolled edge, magnesium alloy slab in traditional operation of rolling normal direction by
Pressure, rolling direction and lateral tension, magnesium alloy slab side is susceptible to cracking under action of pulling stress, in single pass rolling reduction
In the case of big, plank side is split phenomenon and is especially apparent.Change magnesium conjunction by applying side pressure to magnesium alloy slab side in the present invention
Golden plate base side stress, becomes present compression by original tensile stress, inclines to reduce magnesium alloy plate edge and split
To.300 DEG C ~ 400 DEG C are preheated to magnesium alloy slab before the rolling simultaneously, with improve the plastic deformation ability of magnesium alloy slab into
One step reduces magnesium alloy plate rolled edge and splits tendency, and by experiment, this method efficiently reduces the rolled edge of magnesium alloy plate
Tendency is split, stock utilization is improved, reduces production cost, special-shaped Roller Design used in the method is advanced, simple in structure, peace
It fills easy to use, is convenient for industrialized production, there is apparent advance with existing rolling technique compared with.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, wherein：
Fig. 1 is the structural schematic diagram for the milling train that the embodiment of the present invention 2 provides；
Fig. 2 is the magnesium alloy plate that in the embodiment of the present invention 4 prepared by special-shaped roll；
Fig. 3 is the magnesium alloy plate that in the embodiment of the present invention 4 prepared by traditional roll；
Fig. 4 is the stress-strain diagram of the magnesium alloy plate in the embodiment of the present invention 4.
Label：11- upper rollers；111- upper roller protrusions；12- lower rolls；121- lower roll grooves；13- transverse direction fit clearances；14- is vertical
To fit clearance；20- racks；30- pedestals；40- adjusts screwdown gear；50- motors；60- control cabinets；61- milling trains are released the button；
62- milling trains open display lamp；63- rotational speed regulation buttons；64- speed displays；65- milling train close buttons；71- pinion stands；72- joins
Joint；73- connecting shafts；100- magnesium alloy slabs.
Specific implementation mode
Embodiment 1
The present embodiment provides the special-shaped rolls that tendency is split on a kind of reduction magnesium alloy rolling side, including cylindrical upper roller 11 and lower roll
12；The middle part surface of upper roller 11 is circumferentially provided with upper roller protrusion 111；The horizontal sides of upper roller protrusion 111 and vertical edge angle
For 90o；The surface of lower roll 12 is circumferentially provided with the lower roll groove 121 that rolling space is cooperatively formed with upper roller protrusion 111；Under
The horizontal sides of roller groove 121 and vertical edge angle are 90o；Have at the lateral mating surface of upper roller protrusion 111 and lower roll groove 121
The lateral fit clearance 13 for making upper roller protrusion 111 and lower roll groove 121 coordinate；Have at upper roller 11 and longitudinal mating surface of lower roll 12
Having makes upper roller 11 and the longitudinal longitudinal fit clearance 14 being closely pressed against of lower roll 12.
Magnesium alloy slab 100 is placed in rolling space, during the rolling process, upper roller 11 and lower roll 12 are to magnesium alloy slab
Apply longitudinal extruding force, 100 lateral extension of magnesium alloy slab, edge is limited by 121 cell wall of lower roll groove, magnesium alloy slab
100 laterally free extension is restricted, and splits tendency to reduce magnesium alloy plate rolled edge.
Further, upper roller 11 and lower roll 12 are made of 9Cr2Mo materials；Upper roller protrusion 111 and lower roll groove 121
Surface roughness is 1.6 μm of Ra.
Embodiment 2
The present embodiment provides a kind of milling train, including special-shaped roll described in embodiment 1, the rack 20 for installing special-shaped roll,
It is used to support the pedestal 30 of rack 20, the adjusting screwdown gear 40 for roll reduction to be arranged, drives special-shaped roll rotation
The control cabinet 60 of transmission device, the motor 50 being connect with transmission device and the special-shaped roll rotation of control；Transmission device includes tooth
The connecting shaft 73 of wheel seat 71, the shaft coupling 72 of connection motor 50 and pinion stand 71 and connection special-shaped roll and pinion stand 71；Control
It is provided with milling train 61, milling train of releasing the button on case 60 processed and opens display lamp 62, rotational speed regulation button 63, speed display 64 and milling train
Close button 65.
Embodiment 3
The present embodiment provides a kind of methods that tendency is split on reduction magnesium alloy rolling side, include the following steps：
S1 will be preheated to 300 DEG C ~ 400 DEG C by pretreated magnesium alloy slab 100,10~20 min be kept the temperature, to improve magnesium
The plastic deformation ability of alloy slab；
S2, adjustment milling train rotating speed are 15~25 rpm, and roll reduction is 60~80%；
Magnesium alloy slab 100 is placed in the rolling space of above-mentioned special-shaped roll and rolls magnesium alloy plate by S3.
Further, the pretreatment of magnesium alloy slab 100 includes that 100 each surface of magnesium alloy slab polishes flat.
Embodiment 4
The present embodiment makes the special-shaped roll of specific size, and the abnormity made is rolled according to special-shaped roll described in embodiment 1
Roller is loaded on milling train described in embodiment 2, and 3 the methods roll specific magnesium alloy slab in conjunction with the embodiments.
（1）Make special-shaped roll
Upper roller 11 and lower roll 12 are made of 9Cr2Mo materials, and length is 260 mm；
Upper roller 111 a diameter of 120 mm of protrusion, length are 59.6 mm, 1.6 μm of surface roughness Ra；Other portions in upper roller 11
Divide a diameter of 108 mm；
121 a diameter of 120 mm of lower roll groove, length are 60 mm, are highly 5 mm, 1.6 μm of surface roughness Ra；Lower roll 12
Middle a diameter of 130 mm of other parts；
The lateral fit clearance of upper roller protrusion 111 and lower roll groove 121 is 0.4 mm, between upper roller 11 and longitudinal cooperation of lower roll 12
Gap is 2 mm；
（2）To rolling direction（RD）Size is 70 mm, laterally（TD）Size is 59.5 mm, and the AZ31 magnesium that thickness is 3 mm closes
Golden plate base is pre-processed, and each surface of magnesium alloy slab is polished flat；
（3）Rolling
1. prefabricated special-shaped roll is mounted in the rack 20 of milling train；
2. 400 DEG C will be preheated to by pretreated magnesium alloy slab 100 in heating furnace, 10min is kept the temperature；
3. adjustment milling train rotating speed is 20 rpm, 12 symmetric rolling of upper roller 11 and lower roll, roll reduction 70%；
4. rolling magnesium alloy plate；
5. taking out magnesium alloy plate and being cooled to room temperature；
6. shutting down milling train.
As shown in Fig. 2, the magnesium alloy plate side that the present embodiment obtains does not observe macroscopic cracking substantially, arrow side in figure
To for rolling direction.As shown in figure 3, under similarity condition, the magnesium alloy plate appearance prepared using traditional roll is largely run through
Formula crackle, arrow direction is rolling direction in figure.Original magnesium alloy plate and it is rolled into magnesium alloy plate through this embodiment
Rolling direction（RD）And transverse direction（TD）Mechanical property it is as shown in Figure 4, it is seen that by giving magnesium alloy plate to apply lateral lateral pressure
The strength and stiffness of magnesium alloy can be greatly improved.
Embodiment 5
The present embodiment makes the special-shaped roll of specific size, and the abnormity made is rolled according to special-shaped roll described in embodiment 1
Roller is loaded on milling train described in embodiment 2, and 3 the methods roll specific magnesium alloy slab in conjunction with the embodiments.
（1）Make special-shaped roll
Upper roller 11 and lower roll 12 are made of 9Cr2Mo materials, and length is 260 mm；
Upper roller 111 a diameter of 120 mm of protrusion, length are 59.6 mm, 1.6 μm of surface roughness Ra；Other portions in upper roller 11
Divide a diameter of 108 mm；
121 a diameter of 120 mm of lower roll groove, length are 60 mm, are highly 5 mm, 1.6 μm of surface roughness Ra；Lower roll 12
Middle a diameter of 130 mm of other parts；
The lateral fit clearance of upper roller protrusion 111 and lower roll groove 121 is 0.4 mm, between upper roller 11 and longitudinal cooperation of lower roll 12
Gap is 2 mm；
（2）To rolling direction（RD）Size is 70 mm, laterally（TD）Size is 59.6 mm, and thickness is the AZ31 magnesium of 2.5 mm
Alloy slab is pre-processed, and each surface of magnesium alloy slab is polished flat；
（3）Rolling
1. prefabricated special-shaped roll is mounted in the rack 20 of milling train；
2. 300 DEG C will be preheated to by pretreated magnesium alloy slab 100 in heating furnace, 10 min are kept the temperature；
3. adjustment milling train rotating speed is 15 rpm, 12 symmetric rolling of upper roller 11 and lower roll, roll reduction 60%；
4. rolling magnesium alloy plate；
5. taking out magnesium alloy plate and being cooled to room temperature；
6. shutting down milling train.
Size is split for 2 mm in the magnesium alloy plate prepared by the above method the side that be averaged.Under similarity condition, rolled using tradition
It is 5 mm that size is split on the average side of magnesium alloy plate prepared by roller.Still there is side and splits in the magnesium alloy plate prepared in the present embodiment
The main reason for be：Under smaller roll reduction, magnesium alloy plate lateral extension is also smaller, and upper roller 11 and lower roll 12 provide
Transverse shear stress power it is also smaller, therefore, reached by applying transverse shear stress power and magnesium alloy plate rolled edge inhibited to split the effect of tendency
Fruit is not apparent enough compared with embodiment 4.
Embodiment 6
The present embodiment makes the special-shaped roll of specific size, and the abnormity made is rolled according to special-shaped roll described in embodiment 1
Roller is loaded on milling train described in embodiment 2, and 3 the methods roll specific magnesium alloy slab in conjunction with the embodiments.
（1）Make special-shaped roll
Upper roller 11 and lower roll 12 are made of 9Cr2Mo materials, and length is 260 mm；
Upper roller 111 a diameter of 120 mm of protrusion, length are 59.6 mm, 1.6 μm of surface roughness Ra；Other portions in upper roller 11
Divide a diameter of 108 mm；
121 a diameter of 120 mm of lower roll groove, length are 60 mm, are highly 5 mm, 1.6 μm of surface roughness Ra；Lower roll 12
Middle a diameter of 130 mm of other parts；
The lateral fit clearance of upper roller protrusion 111 and lower roll groove 121 is 0.4 mm, between upper roller 11 and longitudinal cooperation of lower roll 12
Gap is 2 mm；
（2）To rolling direction（RD）Size is 70 mm, laterally（TD）Size is 59.4 mm, and thickness is the AZ31 magnesium of 2.5 mm
Alloy slab is pre-processed, and each surface of magnesium alloy slab is polished flat；
（3）Rolling
1. prefabricated special-shaped roll is mounted in the rack 20 of milling train；
2. 400 DEG C will be preheated to by pretreated magnesium alloy slab 100 in heating furnace, 20 min are kept the temperature；
3. adjustment milling train rotating speed is 25 rpm, 12 symmetric rolling of upper roller 11 and lower roll, roll reduction 80%；
4. rolling magnesium alloy plate；
5. taking out magnesium alloy plate and being cooled to room temperature；
6. shutting down milling train.
Size is split for 3 mm in the magnesium alloy plate prepared by the above method the side that be averaged.Under similarity condition, rolled using tradition
Has there is fragmentation phenomenon in magnesium alloy plate prepared by roller.
It should be noted that 121 height of lower roll groove is 5 mm in embodiment 3 to embodiment 6, it is suitable for thickness in 4mm
And magnesium alloy slab 100 below, 121 height of lower roll groove should be designed according to the thickness of magnesium alloy slab 100 to be rolled.
It these are only the embodiment of the present invention, be not intended to limit the scope of the invention, it is every to be said using the present invention
Equivalent structure or equivalent flow shift made by bright book content is applied directly or indirectly in other relevant technical fields,
Similarly it is included within the scope of the present invention.
Claims (5)
1. a kind of special-shaped roll for reducing magnesium alloy rolling side and splitting tendency, which is characterized in that including cylindrical upper roller（11）With
Lower roll（12）；
The upper roller（11）Middle part surface be circumferentially provided with upper roller protrusion（111）；
The upper roller protrusion（111）Horizontal sides and vertical edge angle be 90o；
The lower roll（12）Surface be circumferentially provided with and the upper roller protrusion（111）Cooperatively form the lower roll in rolling space
Groove（121）；
The lower roll groove（121）Horizontal sides and vertical edge angle be 90o；
The upper roller protrusion（111）And lower roll groove（121）Lateral mating surface at have and make upper roller protrusion（111）With under
Roller groove（121）The lateral fit clearance of cooperation（13）；
The upper roller（11）And lower roll（12）Longitudinal mating surface at have make the upper roller（11）And lower roll（12）It is longitudinal close
Longitudinal fit clearance of pressing（14）.
2. the special-shaped roll according to claim 1 for reducing magnesium alloy rolling side and splitting tendency, which is characterized in that the upper roller
（11）And lower roll（12）It is made of 9Cr2Mo materials；
The upper roller protrusion（111）And lower roll groove（121）Surface roughness be 1.6 μm of Ra.
3. a kind of milling train, which is characterized in that including special-shaped roll as claimed in claim 1 or 2, for installing the special-shaped roll
Rack（20）, be used to support the rack（20）Pedestal（30）, adjusting screwdown gear for roll reduction to be arranged
（40）, the transmission device for driving the special-shaped roll rotation, the motor being connect with the transmission device（50）And described in control
The control cabinet of special-shaped roll rotation（60）；
The transmission device includes pinion stand（71）, the connection motor（50）And pinion stand（71）Shaft coupling（72）And even
Connect the special-shaped roll and pinion stand（71）Connecting shaft（73）；
The control cabinet（60）On be provided with milling train and release the button（61）, milling train open display lamp（62）, rotational speed regulation button（63）、
Speed display（64）With milling train close button（65）.
4. a kind of method for reducing magnesium alloy rolling side and splitting tendency, which is characterized in that include the following steps：
S1 will pass through pretreated magnesium alloy slab（100）300 DEG C ~ 400 DEG C are preheated to, 10~20 min are kept the temperature；
S2, adjustment milling train rotating speed are 15~25 rpm, and roll reduction is 60~80%；
S3, by the magnesium alloy slab（100）It is placed in the rolling space of special-shaped roll as claimed in claim 1 or 2 and rolls magnesium
Sheet alloy.
5. the method according to claim 1 for reducing magnesium alloy rolling side and splitting tendency, which is characterized in that in the step 1,
The magnesium alloy slab（100）Pretreatment include by magnesium alloy slab（100）Each surface polishes flat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810033887.2A CN108311543A (en) | 2018-01-15 | 2018-01-15 | A kind of special-shaped roll, milling train and method for reducing magnesium alloy rolling side and splitting tendency |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810033887.2A CN108311543A (en) | 2018-01-15 | 2018-01-15 | A kind of special-shaped roll, milling train and method for reducing magnesium alloy rolling side and splitting tendency |
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| CN108311543A true CN108311543A (en) | 2018-07-24 |
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| CN201810033887.2A Pending CN108311543A (en) | 2018-01-15 | 2018-01-15 | A kind of special-shaped roll, milling train and method for reducing magnesium alloy rolling side and splitting tendency |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109675924A (en) * | 2018-12-11 | 2019-04-26 | 太原理工大学 | It is a kind of for manufacturing the rolling device and preparation method of stainless steel aluminium laminated composite plate |
| CN110170521A (en) * | 2019-05-30 | 2019-08-27 | 武汉理工大学 | The convex recessed Special-shaped Plates roll forming process of one kind and roll structure |
| CN110340153A (en) * | 2019-07-18 | 2019-10-18 | 太原科技大学 | It is a kind of to be designed suitable for reducing the Casting Roller split on roll-casting of magnesium alloy plate side |
| CN110665989A (en) * | 2019-10-10 | 2020-01-10 | 温州中希电工合金有限公司 | Preparation method of side-surface composite copper-aluminum composite belt |
| CN110756383A (en) * | 2019-11-27 | 2020-02-07 | 东台市富安合成材料有限公司 | Clamping type synthetic leather coating device |
| CN113857253A (en) * | 2021-11-11 | 2021-12-31 | 太原理工大学 | Equipment and method for rolling magnesium/aluminum composite plate to inhibit edge cracking of magnesium alloy |
| CN114082784A (en) * | 2021-11-11 | 2022-02-25 | 太原理工大学 | Self-adaptive device for inhibiting rolling edge crack of magnesium alloy plate and rolling method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110170521A (en) * | 2019-05-30 | 2019-08-27 | 武汉理工大学 | The convex recessed Special-shaped Plates roll forming process of one kind and roll structure |
| CN110340153A (en) * | 2019-07-18 | 2019-10-18 | 太原科技大学 | It is a kind of to be designed suitable for reducing the Casting Roller split on roll-casting of magnesium alloy plate side |
| CN110340153B (en) * | 2019-07-18 | 2020-10-20 | 太原科技大学 | Casting roller suitable for reducing edge crack of magnesium alloy cast-rolled plate |
| CN110665989A (en) * | 2019-10-10 | 2020-01-10 | 温州中希电工合金有限公司 | Preparation method of side-surface composite copper-aluminum composite belt |
| CN110756383A (en) * | 2019-11-27 | 2020-02-07 | 东台市富安合成材料有限公司 | Clamping type synthetic leather coating device |
| CN113857253A (en) * | 2021-11-11 | 2021-12-31 | 太原理工大学 | Equipment and method for rolling magnesium/aluminum composite plate to inhibit edge cracking of magnesium alloy |
| CN114082784A (en) * | 2021-11-11 | 2022-02-25 | 太原理工大学 | Self-adaptive device for inhibiting rolling edge crack of magnesium alloy plate and rolling method |
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