CN107626761B - Prepare the pressurizing unit and processing method of high-obdurability magnesium alloy plate - Google Patents
Prepare the pressurizing unit and processing method of high-obdurability magnesium alloy plate Download PDFInfo
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Abstract
The invention belongs to the technical field of non-ferrous metal plastic processing and increase mechanical property, specifically a kind of pressurizing unit for preparing high-obdurability magnesium alloy plate and processing method.Including squeezing machine base, extruder, display screen, indicator light, power switch, heating mantle switch, pressure electric machine controller, pressure motor connecting wire, pressure motor base, pressure motor 10, pressure motor transmission belt, squeeze telescopic cavity, squeeze telescopic press head, extruding punch, fixing bolt 15, left fixed frame, right fixed frame, heating mantle, Extruding die, magnesium alloy blank, the left die cavity of Extruding die, Extruding die right mould chamber, Extruding die shears step, fixed press punch-pin, fixed press punch-pin chassis, fixed press punch-pin raised platforms, fixed press punch-pin shears step, magnesium alloy plate and squeezing passage.Height of the invention is tough, high formability magnesium alloy plate and belt extruding method is simple, at low cost, high-efficient, and can continuous production preparation large scale, large-sized plates band.
Description
Technical field
The invention belongs to non-ferrous metal plastic processing and increase mechanical property technical field, it is specifically a kind of prepare it is high-strength
The pressurizing unit and processing method of tough magnesium alloy plate.
Background technique
Magnesium alloy is structural metallic materials most light in current practice, and density is about the 2/3 of aluminium alloy, the 1/ of steel
4.Relative to conventional metal frames material and engineering plastics, magnesium alloy has many advantages, such as, as specific strength and specific stiffness are high, damp
Performance is good, electromagnetic shielding and capability of resistance to radiation are strong, thermal conductivity is good, Cutting free is processed and easily recycling etc., is known as " 21 century green
Engineering material " is used widely in fields such as aerospace, communications and transportation, weaponry, information industries.China is generation
One of magnesium resource reserves country the most abundant in boundary, and be also the maximum producing country of former magnesium and exported country, China is former at present
Magnesium yield accounts for about the 70% of Gross World Product.Therefore, China magnesium alloy research, production and processing and in terms of with huge
Resources advantage.However, magnesium alloy is close-packed hexagonal structure (HCP), only one slip system, lacks independent sliding at room temperature
Plastic strain is coordinated by system, this causes, and its intensity is low, temperature-room type plasticity is poor, difficulty is shaped, so magnesium alloy is widely used in
Largely it is severely limited.Therefore, in order to further expand the application field and application range of magnesium alloy, it is necessary to
Develop that a kind of controllability is strong, simple process, processing technology that is high-efficient, can continuously preparing high-obdurability magnesium alloy plate.
Summary of the invention
The present invention in order to provide a kind of strong controllability, simple process, it is high-efficient, can continuously prepare high-obdurability magnesium alloy plate
The processing technology of material provides a kind of pressurizing unit for preparing high-obdurability magnesium alloy plate and processing method.
The present invention takes following technical scheme: a kind of pressurizing unit preparing high-obdurability magnesium alloy plate, including squeezes
Machine, extruder left side are provided with pressure motor, and pressure motor is connected by pressure motor connecting wire with extruder, pressure electricity
It is pressure motor base below machine, top is pressure motor transmission belt；It is provided with extruding telescopic cavity above pressure motor transmission belt,
It squeezes and is provided with extruding telescopic press head in telescopic cavity, squeeze telescopic press head and be in contact with extruding punch, extruder squeezes telescopic cavity
And squeeze telescopic press head and belong to existing equipment, the present invention is no longer described its principle.It is provided with above extruder left solid
Determine frame and right fixed frame, is Extruding die and fixed press punch-pin, Extruding die and fixation between left fixed frame and right fixed frame
Squeezing passage is formed between extruding punch, Extruding die and fixed press punch-pin periphery are provided with heating mantle, Extruding die die cavity
Including left die cavity and right mould chamber, the longitudinal section of Extruding die is stepped, and left die cavity cross section is square, and right mould chamber cross section is in
Rectangle, the upper and lower inner wall of right mould chamber are provided with symmetrical Extruding die shearing step, are placed between left die cavity and right mould chamber
Magnesium alloy blank squeezes telescopic press head and is arranged in the gap between left die cavity and right mould chamber；Fixed press punch-pin includes chassis,
And the raised platforms of center chassis are set, the chassis of fixed press punch-pin is circle, and raised platforms cross section is in rectangle, convex
It plays the upper and lower outer wall of platform and is provided with symmetrical fixed press punch-pin shearing step.
Further, Extruding die mold is prepared with 4Cr5MoSiV1 material, and it is 1 p- that Extruding die, which shears step number,
10 pairs, each angle is smooth rounded corner, and mold cavity surface roughness is Ra0.08-0.16 μm.
Further, fixed press punch mold is prepared with Cr12MoV material, and fixed press punch-pin shearing step number is
1 p- 10 pairs, each angle is smooth rounded corner, and fixed press convex mould surface roughness is Ra0.08-0.16 μm.
Further, Extruding die die cavity inner surface, fixed press punch-pin raised platforms outer surface smear pyrographite.
Further, extruder is horizontal, to squeeze machine base below extruder, is provided on the console of extruder aobvious
Display screen, indicator light, power switch, heating mantle switch and pressure electric machine controller.
A kind of processing method by preparing the pressurizing unit of high-obdurability magnesium alloy plate: specific step is as follows:
1. preparing extrusion die；
2. fixed press mold:
It smears pyrographite in Extruding die die cavity inner surface, fixed press punch-pin raised platforms outer surface and is lubricated,
Extruding die and fixed press punch-pin are connected by fixing bolt, is formed and is squeezed between Extruding die and fixed press punch-pin
Extrusion die is installed in the left fixed frame and right fixed frame of horizontal extruder, is placed in heating mantle, will squeeze by pressure passageway
Punch-pin protrudes into Extruding die die cavity, firmly installs, and connection relationship is correct, sequentially operates；
3. pre-processing magnesium alloy stock:
1) it is polished, is degreased, impurity and oxidation with six surfaces of the 800 mesh sand paper to magnesium alloy block blank
Layer, then carries out fine grinding with 2000 mesh sand paper, makes surface cleaning, smooth；
2) acetone 450ml, each 550ml of dehydrated alcohol are measured, is poured into clearing glass washing trough, being stirred with glass bar makes it
Uniformly mixing, is configured to acetone+dehydrated alcohol mixed solution；
3) the clearing glass washing trough equipped with mixed solution is placed on supersonic wave cleaning machine, magnesium alloy blank is soaked in mixing
In solution, supersonic wave cleaning machine power switch is opened, vibration washing, time 20min are carried out；
4) after vibration of ultrasonic wave washing, magnesium alloy blank is taken out with tweezers, is placed on drying frame, with hair dryer by magnesium
The drying of alloy blank surface；
4. putting magnesium alloy blank:
Pyrographite is smeared on magnesium alloy blank surface to be lubricated, and is exited extruding punch, magnesium alloy blank is placed in crowded
It presses in mould, is contacted with fixed press punch-pin, it is intracavitary that extruding punch is protruded into Extruding die type, contacts magnesium alloy blank；
5. preheating magnesium alloy blank: heating mantle of opening an account, heating extrusion die and magnesium alloy stock, heating temperature are preset as
150 DEG C -550 DEG C, 1h-6h is kept the temperature when reaching preset temperature；
6. open squeeze telescopic press head, run extruding punch, to the magnesium alloy blank being previously placed in mold cavity into
Row squeezes, and magnesium alloy blank generates shunting under the action of Extruding die and fixed press punch-pin, flows to two sides, and in fixation
The upper and lower inlet of extruding punch, which generates, shunts angular pressing texturing, and magnesium alloy grain structure shunts angular pressing texturing because generating
And it refines；Under the action of extruding punch, magnesium alloy blank continues flow forward, the equal channel angular pressing at fixed press embossing die rotation angle
Compressive strain, grain structure are refined again；When magnesium alloy blank is flow to, Extruding die shears step and fixed press punch-pin is cut
When cutting at step, generate shear-deformable, grain structure is further refined, (under the action of multiple shearing steps grain structure
It can persistently be refined)；When extruding punch is run to fixed press punch-pin, stop promoting, complete to squeeze, primary squeeze just can connect
It is continuous to prepare two large scales, high-obdurability magnesium alloy plate；
7. after squeezing, closing heating mantle, exiting extruding punch；
8. polishing, clean processing:
The waste material for cutting off high-obdurability magnesium alloy plate, and polishes to its surface with sand paper, then with putting it into
In the mixed liquor of acetone and dehydrated alcohol, it is cleaned using ultrasonic activation, makes its cleaning, is finally blown with hair dryer
It is dry.
Conclusion: after being processed by novel extrusion processing method, the grain structure of magnesium alloy plate and belt is more uniform, fine and close,
Average grain size is refined to 0.8 μm by initial 38 μm, and basal plane texture intensity is weakened, structure refinement, basal plane texture intensity
Weaken the raising for being conducive to magnesium alloy strength, plasticity and forming property.
Compared with prior art, the beneficial effects of the present invention are:
The present invention has apparent advance, is the situation poor for intensity, plasticity, using novel extrusion processing method
So that magnesium alloy blank generates in extrusion process shunts angular pressing texturing, miter angle extruding deforming and cross-section shear extrusion
Deformation, grain structure is constantly refined in the process, thus achieve the purpose that refine grain structure, activeness and quietness, it is primary to squeeze
Pressure just can continuously prepare two large scales, high-obdurability magnesium alloy plate.High tough, high formability magnesium alloy plate of the invention
Band extruding method is simple, at low cost, high-efficient, and energy continuous production prepares large scale, large-sized plates band, scale
Application prospect is relatively broad, is the very ideal preparation for processing of high-obdurability magnesium alloy plate.
Detailed description of the invention
Fig. 1 is the squeezed state figure of high-obdurability magnesium alloy plate in the present invention；
Fig. 2 is the diagrammatic cross-section of squeezing passage；
Fig. 3 is the right view of Fig. 2；
Fig. 4 is initial magnesium alloy blank；
Fig. 5 is the metallographic structure of magnesium alloy plate after pressure processing；
1- extruding machine base in figure, 2- extruder, 3- display screen, 4- indicator light, 5- power switch, 6- heating mantle switch,
7- pressure electric machine controller, 8- pressure motor connecting wire, 9- pressure motor base, 10- pressure motor, 11- pressure motor pass
Dynamic band, 12- squeeze telescopic cavity, and 13- squeezes telescopic press head, 14- extruding punch, 15- fixing bolt, the left fixed frame of 16-, the right side 17-
Fixed frame, 18- heating mantle, 19- Extruding die, 20- magnesium alloy blank, the left die cavity of 21- Extruding die, 22- Extruding die right mould
Chamber, 23- Extruding die shearing step, 24- fixed press punch-pin, 25- fixed press punch-pin chassis, 26- fixed press punch-pin are convex
Platform is played, 27- fixed press punch-pin shears step, 28- magnesium alloy plate, 29- squeezing passage.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and specific embodiments:
As shown in Figure 1, the pressurizing unit for preparing high-obdurability magnesium alloy plate includes: to squeeze machine base 1, extruder 2 is shown
Display screen 3, indicator light 4, power switch 5, heating mantle switch 6, pressure electric machine controller 7, pressure motor connecting wire 8, pressure electricity
Machine base 9, pressure motor 10, pressure motor transmission belt 11, extruding telescopic cavity 12, extruding telescopic press head 13, extruding punch 14, Gu
Determine bolt 15, left fixed frame 16, right fixed frame 17, heating mantle 18, Extruding die 19, magnesium alloy blank 20, the left mould of Extruding die
Chamber 21, Extruding die right mould chamber 22, Extruding die shearing step 23, fixed press punch-pin 24, fixed press punch-pin chassis 25, Gu
Determine extruding punch raised platforms 26, fixed press punch-pin shears step 27, magnesium alloy plate 28, squeezing passage 29.Wherein, it squeezes
Machine 2 be it is horizontal, to squeeze machine base 1 below extruder, display screen 3, indicator light are provided on the console of horizontal extruder 2
4, power switch 5, heating mantle switch 6, pressure electric machine controller 7；Pressure motor 10, pressure electricity are provided on the left of extruder 2
Machine 10 is connected by pressure motor connecting wire 8 with extruder 2；It is that pressure motor base 9, top are below pressure motor 10
Pressure motor transmission belt 11；It is provided with above pressure motor transmission belt 11 and squeezes telescopic cavity 12, squeezed and be provided in telescopic cavity 12
Telescopic press head 13 is squeezed, telescopic press head 13 is squeezed and is in contact with extruding punch 14,14 surface roughness of extruding punch is Ra0.08-
0.16μm；It is provided with left fixed frame 16 and right fixed frame 17 above extruder 2, is that extruding is recessed between left and right fixed 16,17
Mould 19 and fixed press punch-pin 24, Extruding die 19 and fixed press punch-pin 24 by fixing bolt 15 and left and right fixed 16,
17 are connected, and squeezing passage 29 are formed between Extruding die 19 and fixed press punch-pin 24, Extruding die 19 and fixed press are convex
22 periphery of mould is provided with heating mantle 18, and Extruding die 19 and 24 surface roughness of fixed press punch-pin are Ra0.08-0.16 μm；
19 die cavity of Extruding die is made of left die cavity 21 and right mould chamber 22, and longitudinal section is stepped, and left 21 cross section of die cavity is square, right
22 cross section of die cavity is in rectangle, and the upper and lower inner wall of right mould chamber 22 is provided with symmetrical shearing step 23；Fixed press punch-pin 24
Chassis 25 be circle, 26 cross section of raised platforms is in rectangle, and the upper and lower outer wall of raised platforms 26 is provided with symmetrical shearing
Step 27；It squeezes telescopic press head 13 to move right by default journey driving extruding punch 14, magnesium alloy blank 20 is in extrusion process
Continuously generated in journey shunt angular pressing texturing, miter angle extruding deforming with it is shear-deformable, grain structure is continuous in the process
It is refined, achievees the purpose that refine grain structure, activeness and quietness, thus high-obdurability magnesium alloy plate 28.
It is the diagrammatic cross-section of squeezing passage shown in Fig. 2, the squeezing passage 29 is convex in Extruding die 19 and fixed press
Between mould 24.
It is right view in Fig. 2 shown in Fig. 3, the cross section of the Extruding die 19 is circle.The right side of the Extruding die 19
22 cross section of die cavity is rectangle.The cross section of the raised platforms 26 of the fixed press punch-pin 24 is rectangle.
It is the metallographic structure of magnesium alloy plate after initial magnesium alloy blank and extrusion process, average grain size shown in Fig. 4
It is refined to 1 μm by initial 38 μm, this is very beneficial for the raising of magnesium alloy toughness and tenacity.
The present invention prepares the extruding method of high-obdurability magnesium alloy plate, sequentially includes the following steps:
1. preparing extrusion die
Extruding die mold 19 is prepared with 4Cr5MoSiV1 material, and die cavity is made of left die cavity 21 and right mould chamber 22, transversal
Face is rounded, and longitudinal section is stepped, and left 21 cross section of die cavity is square, and 22 cross section of right mould chamber is in rectangle, on right mould chamber 22,
Lower inner wall is provided with symmetrical shearing step 23, and shearing 23 numbers of step are 1 p- 10 pairs, and each angle is smooth rounded corner,
Mold cavity surface roughness is Ra0.08-0.16 μm.
Fixed press punch mold 24 is prepared with Cr12MoV material, and chassis 25 is circle, and 26 cross section of raised platforms is in square
Shape, the upper and lower outer wall of raised platforms 26 are provided with symmetrical shearing step 27, and shearing 27 numbers of step is 1 p- 10 pairs, respectively
A angle is smooth rounded corner, and 24 surface roughness of fixed press punch-pin is Ra0.08-0.16 μm.
Extruding punch mold 14 is prepared with Cr12MoV material, and cross section is square, and 14 surface roughness of extruding punch is
Ra0.08-0.16μm。
2. fixed press mold
It smears pyrographite in 19 die cavity inner surface of Extruding die, 24 raised platforms of fixed press punch-pin, 26 outer surface and carries out
Lubrication, is connected Extruding die 19 and fixed press punch-pin 24 by fixing bolt 15, Extruding die 19 and fixed press
Squeezing passage 29 is formed between punch-pin 22, extrusion die is installed in the die fixing device 16,17 of horizontal extruder 2, juxtaposition
In in heating mantle 18, extruding punch 14 is protruded into 19 die cavity of Extruding die, is firmly installed, connection relationship is correct, sequentially operates.
3. pre-processing magnesium alloy stock
It is polished with surface of the sand paper to magnesium alloy stock 20, makes surface cleaning, smooth.
Magnesium alloy stock 20 is soaked in acetone+dehydrated alcohol mixed liquor progress ultrasonic activation washing, the time is
1h。
Magnesium alloy stock 20 is taken out after ultrasonic activation washing, is placed on drying frame, is dried up with hair dryer.
4. putting magnesium alloy blank
Pyrographite is smeared on 20 surface of magnesium alloy blank to be lubricated, and extruding punch 14 is exited, by magnesium alloy blank 20
It is placed in Extruding die 19, is contacted with fixed press punch-pin 24, it is intracavitary that extruding punch 14 is protruded into Extruding die type 19, contacts magnesium
Alloy blank 20.
5. heating mantle of opening an account 18, heating extrusion die and magnesium alloy stock 20, heating temperature are preset as 150 DEG C -550 DEG C,
1h-6h is kept the temperature when reaching preset temperature.
Telescopic press head 13 is squeezed 6. opening, runs extruding punch 14, to the magnesium alloy base being previously placed in mold cavity
Material 20 is squeezed, and magnesium alloy blank 20 generates shunting under the action of Extruding die 19 and fixed press punch-pin 24, to two sides
Flowing, and generated in the upper and lower inlet of fixed press punch-pin 24 and shunt angular pressing texturing, magnesium alloy grain structure divides because generating
Circulation angle extruding deforming and refine；Under the action of extruding punch 14, magnesium alloy blank 20 continues flow forward, in fixed press
24 corner miter angle extruding deforming of punch-pin, grain structure are refined again；When magnesium alloy blank 20 flow to Extruding die 19
When shearing at step 23,27 with fixed press punch-pin 24, generation is shear-deformable, and grain structure is further refined, and (is cut multiple
Grain structure can be refined persistently under the action of cutting step)；When the operation of extruding punch 14 to fixed press punch-pin 24, stop pushing away
Into completion squeezes, and primary squeeze just can continuously prepare two large scales, high-obdurability magnesium alloy plate 28.
7. after squeezing, closing heating mantle 18, exiting extruding punch 14.
8. polishing, clean processing
The waste material for cutting off high-obdurability magnesium alloy plate 28, and polishes to its surface with sand paper, then with being put
In the mixed liquor for entering acetone and dehydrated alcohol, it is cleaned using ultrasonic activation, makes its cleaning, is finally blown with hair dryer
It is dry.
The bright principle for preparing high-obdurability magnesium alloy plate by extrusion process of we is:
Under the promotion of extruding punch, magnesium alloy blank generates under the action of Extruding die and fixed press punch-pin divides
Stream is flowed to two sides, and is generated in the upper and lower inlet of fixed press punch-pin and shunted angular pressing texturing, magnesium alloy grain structure
It is refined due to shunting angular pressing texturing because generating；Under the action of extruding punch, magnesium alloy blank continues flow forward, in fixation
Extruding punch corner miter angle extruding deforming, grain structure are refined again；When magnesium alloy blank flow to Extruding die with
When fixed press punch-pin is sheared at step, generation is shear-deformable, and grain structure is further refined, (in multiple shearing steps
Acting on lower grain structure can persistently be refined)；When extruding punch is run to fixed press punch-pin, stop promoting, complete to squeeze,
Primary squeeze just can continuously prepare two large scales, high-obdurability magnesium alloy plate.
Claims (6)
1. a kind of pressurizing unit for preparing high-obdurability magnesium alloy plate, including extruder (2), extruder (2) left side is provided with
Pressure motor (10), pressure motor (10) are connected by pressure motor connecting wire (8) with extruder (2), pressure motor
(10) lower section is pressure motor base (9), and top is pressure motor transmission belt (11)；Setting above pressure motor transmission belt (11)
Have extruding telescopic cavity (12), squeeze and be provided with extruding telescopic press head (13) in telescopic cavity (12), squeeze telescopic press head (13) and squeezes
Belling mould (14) is in contact, it is characterised in that: left fixed frame (16) and right fixed frame (17) are provided with above extruder (2), it is left
It is Extruding die (19) and fixed press punch-pin (24) between fixed frame (16) and right fixed frame (17), Extruding die (19) and solid
Determine to form squeezing passage (29) between extruding punch (24), Extruding die (19) and fixed press punch-pin (24) periphery are provided with and add
Hot jacket (18), Extruding die (19) die cavity include left die cavity (21) and right mould chamber (22), and the longitudinal section of Extruding die (19) is in rank
Scalariform, left die cavity (21) cross section are square, and right mould chamber (22) cross section is in rectangle, and the upper and lower inner wall of right mould chamber (22) is provided with
Symmetrical Extruding die shears step (23), is placed with magnesium alloy blank between left die cavity (21) and right mould chamber (22)
(20), it squeezes in the gap that telescopic press head (13) are arranged between left die cavity (21) and right mould chamber (22)；Fixed press punch-pin
It (24) include chassis (25), and setting is on the raised platforms (26) at chassis (25) center, the chassis of fixed press punch-pin (24)
It (25) is circle, raised platforms (26) cross section is in rectangle, and the upper and lower outer wall of raised platforms (26) is provided with symmetrical fixation
Extruding punch shears step (27).
2. the pressurizing unit according to claim 1 for preparing high-obdurability magnesium alloy plate, it is characterised in that: described squeezes
Concave die (19) are pressed to be prepared with 4Cr5MoSiV1 material, it is 1 p- 10 pairs that Extruding die, which shears step (23) number, each angle
For smooth rounded corner, mold cavity surface roughness is Ra0.08-0.16 μm.
3. the pressurizing unit according to claim 2 for preparing high-obdurability magnesium alloy plate, it is characterised in that: described consolidates
Determine extruding punch mold (24) to be prepared with Cr12MoV material, it is 1 p- 10 pairs that fixed press punch-pin, which shears step (27) number, respectively
A angle is smooth rounded corner, and fixed press punch-pin (24) surface roughness is Ra0.08-0.16 μm.
4. the pressurizing unit according to claim 3 for preparing high-obdurability magnesium alloy plate, it is characterised in that: described squeezes
Press mould (19) die cavity inner surface, pyrographite is smeared in the outer surface of fixed press punch-pin (24) raised platforms (26).
5. the pressurizing unit according to claim 4 for preparing high-obdurability magnesium alloy plate, it is characterised in that: described squeezes
Press (2) be it is horizontal, to squeeze machine base (1) below extruder (2), be provided with display screen on the console of extruder (2)
(3), indicator light (4), power switch (5), heating mantle switch (6) and pressure electric machine controller (7).
6. a kind of processing method by preparing the pressurizing unit of high-obdurability magnesium alloy plate as claimed in claim 5: specific
Steps are as follows:
1. preparing extrusion die；
2. fixed press mold:
Extruding die (19) die cavity inner surface, fixed press punch-pin (24) raised platforms (26) outer surface smear pyrographite into
Row lubrication, is connected Extruding die (19) and fixed press punch-pin (24) by fixing bolt (15), Extruding die (19)
Squeezing passage (29) are formed between fixed press punch-pin (22), extrusion die is installed on to the left fixation of horizontal extruder (2)
In frame (16) and right fixed frame (17), it is placed in heating mantle (18), extruding punch (14) is protruded into Extruding die (19) die cavity
It is interior, it firmly installs, connection relationship is correct, sequentially operates；
3. pre-processing magnesium alloy stock:
1) it is polished, is degreased, impurity and oxide layer with six surfaces of the 800 mesh sand paper to magnesium alloy block blank, then
Fine grinding is carried out with 2000 mesh sand paper, makes surface cleaning, smooth；
2) acetone 450ml, each 550ml of dehydrated alcohol are measured, is poured into clearing glass washing trough, being stirred with glass bar makes it uniformly
Mixing, is configured to acetone+dehydrated alcohol mixed solution；
3) the clearing glass washing trough equipped with mixed solution is placed on supersonic wave cleaning machine, magnesium alloy blank is soaked in mixed solution
In, supersonic wave cleaning machine power switch is opened, vibration washing, time 20min are carried out；
4) after vibration of ultrasonic wave washing, magnesium alloy blank is taken out with tweezers, is placed on drying frame, with hair dryer by magnesium alloy
Blank surface drying；
4. putting magnesium alloy blank:
Pyrographite is smeared on magnesium alloy blank (20) surface to be lubricated, and extruding punch (14) is exited, by magnesium alloy blank
(20) it is placed in Extruding die (19), is contacted with fixed press punch-pin (24), extruding punch (14) is protruded into Extruding die type
(19) intracavitary, it contacts magnesium alloy blank (20)；
5. preheating magnesium alloy blank: heating mantle of opening an account (18), heating extrusion die and magnesium alloy stock (20), heating temperature are default
It is 150 DEG C -550 DEG C, keeps the temperature 1h-6h when reaching preset temperature；
Telescopic press head (13) are squeezed 6. opening, run extruding punch (14), to the magnesium alloy base being previously placed in mold cavity
Material (20) is squeezed, and magnesium alloy blank (20) generates under the action of Extruding die (19) and fixed press punch-pin (24) divides
Stream is flowed to two sides, and is generated in the upper and lower inlet of fixed press punch-pin (24) and shunted angular pressing texturing, magnesium alloy crystal grain
Tissue refines due to shunting angular pressing texturing because generating；Under the action of extruding punch (14), magnesium alloy blank (20) continue to
Preceding flowing, in fixed press punch-pin (24) corner miter angle extruding deforming, grain structure is refined again；Work as magnesium alloy blank
(20) when flowing at Extruding die shearing step (23) and fixed press punch-pin shearing step (27), shear-deformable, crystalline substance is generated
Grain tissue is further refined；When extruding punch (14) operation to fixed press punch-pin (24), stop promoting, completes to squeeze；
7. after squeezing, closing heating mantle (18), exiting extruding punch (14)；
8. polishing, clean processing:
The waste material for cutting off high-obdurability magnesium alloy plate (28), and polishes to its surface with sand paper, then with putting it into
In the mixed liquor of acetone and dehydrated alcohol, it is cleaned using ultrasonic activation, makes its cleaning, is finally blown with hair dryer
It is dry.
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| CN108251773B (en) * | 2018-02-08 | 2020-01-24 | 四川理工学院 | Extrusion method for preparing high-strength high-toughness wrought magnesium alloy and product |
| CN109702028A (en) * | 2018-12-25 | 2019-05-03 | 太原理工大学 | A kind of extruding method of high-performance magnesium-alloy tubing |
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| CN111974824A (en) * | 2020-07-10 | 2020-11-24 | 湖南工程学院 | A extrusion device for production of magnesium alloy panel |
| CN112620372B (en) * | 2020-12-23 | 2022-05-24 | 太原理工大学 | Mold and method for preparing weak basal plane texture magnesium alloy plate strip through continuous differential extrusion |
| CN113102534B (en) * | 2021-04-14 | 2023-06-20 | 烟台大学 | Variable cross-section aluminum alloy section hot extrusion device |
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