CN102240791B - Device and method for hydraulic injection filled type extrusion cast forming of molten aluminum magnesium alloy - Google Patents

Device and method for hydraulic injection filled type extrusion cast forming of molten aluminum magnesium alloy Download PDF

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CN102240791B
CN102240791B CN 201110181119 CN201110181119A CN102240791B CN 102240791 B CN102240791 B CN 102240791B CN 201110181119 CN201110181119 CN 201110181119 CN 201110181119 A CN201110181119 A CN 201110181119A CN 102240791 B CN102240791 B CN 102240791B
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charging ram
die
magnesium alloy
hydraulic pressure
melting furnace
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CN102240791A (en
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杜之明
陈刚
曹琪
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Harbin Institute of Technology
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Harbin Institute of Technology
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Abstract

The invention provides a device and a method for hydraulic injection filled type extrusion cast forming of a molten aluminum magnesium alloy, and relates to a device and a method for extrusion cast forming of an aluminum magnesium alloy, which aim to solve the problems that the conventional extrusion casting device cannot realize near net forming and liquid metal is easily oxidized in the extrusion casting process. In the device, a material pushing barrel is provided with a stepped hole; a smelting furnace and a female die are arranged in parallel on the material pushing barrel; and a first charging ram and a second charging ram are arranged in the large-diameter section of the stepped hole and are connected with a piston rod of a double piston rod hydraulic cylinder respectively. The method comprises the following steps of: arranging the smelting furnace and the female die on the material pushing barrel, forming a cavity between a male die and the female die, and introducing protective gas into the smelting furnace and the material pushing barrel; adjusting the distance between the first charging ram and the second charging ram to realize quantitative pouring; filling the liquid metal; pressurizing the male die to realize the near net forming of workpieces; and making the male die in return stroke, and taking the workpieces out. The device and the method are used for a production process of aluminum magnesium alloy workpieces.

Description

Type extrusion casint building mortion and method are filled in the hydraulic pressure injection behind the smelting aluminum-magnesium alloy
Technical field
The present invention relates to a kind of almag extrusion casint building mortion and method, be specifically related to a kind of smelting aluminum-magnesium alloy after the hydraulic pressure injection fill type extrusion casint building mortion and method, belong to materials processing engineering field.
Background technology
Extrusion casint (liquid forging) is a kind of metal forming technology between casting and die forging.It is directly to be poured into a certain amount of liquid state or semi-solid-state metal in the die, then by the punch near closed hollow ring and impose machinery static pressure, utilize the flowability of liquid metal to be full of whole die cavity, make liquid metal crystallization under pressure, solidify and a small amount of plastic deformation.Compare with casting, avoid product shrinkage cavity, loose to occur, refinement crystal grain, improved intensity; Compare with die forging, saved forming process and forming pressure (be about Die Forging 1/5~1/3), and performance is near the forging index; Without flash and casting rising head, stock utilization is high.Therefore extrusion casint is a kind of advanced manufacturing technology of laborsaving, energy-conservation, material-saving.
Squeeze casting technology mainly is divided into Direct Squeezing Casting and indirect extrusion casting.Direct Squeezing Casting manufacturing process and solid die forging are similar, and drift directly loads on the liquid metal, can make performance and forging quite, the comparatively simple product of shape.Indirect extrusion casting manufacturing process and die casting are similar, mould is closed before pouring metal melt, molten metal injects die cavity by extrusion piston, its ingate size larger (comparing with die casting), thereby the pressure that provides of extrusion piston can effective communication to each position of product, make its under high pressure crystallization and plastic deformation.
At present, Direct Squeezing Casting technology Main Problems is comparatively difficult for realizing quantitative pouring, and then can't realize near-net-shape fully, although can be from external import quantitative pouring machine, but not only price is too high, and can't solve the problem of oxidation in the liquid metal filling process fully; Indirect extrusion casting needs dedicated extruded casting machine, and common hydraulic press can't satisfy its instructions for use fully, but dedicated extruded casting machine cost is very high, and extruding force is limited, and the mechanical property of product is difficult to be further enhanced.
Summary of the invention
The objective of the invention is to realize in order to solve existing extrusion casint device the problem of near-net-shape, and the easy oxidation of molten metal in the existing extrusion casint process, the impurity that exists in the molten metal easily flows out, thereby affect the problem of the mechanical property of the quality of product and product, and then type extrusion casint building mortion and method were filled in the hydraulic pressure injection after a kind of smelting aluminum-magnesium alloy was provided.
Technical scheme of the present invention is: the hydraulic pressure injection is filled type extrusion casint building mortion and is comprised melting furnace, punch, spacing elasticity scale and die behind the smelting aluminum-magnesium alloy; Have charging aperture on the described die, described punch cooperates installation with die, form die cavity between punch and the die, described spacing elasticity scale is connected between punch and the die, be provided with discharging opening on the base plate of described melting furnace, the hydraulic pressure injection is filled type extrusion casint building mortion and is also comprised the hydraulic pressure injection device behind the described smelting aluminum-magnesium alloy, described hydraulic pressure injection device comprises the pusher cylinder, the first charging ram, the second charging ram and hydraulic cylinder with double piston rods, have shoulder hole along its axis on the described pusher cylinder, described melting furnace and die along continuous straight runs are set up in parallel on the pusher cylinder, and the discharging opening of melting furnace and the charging aperture of die all are communicated with the enlarged diameter section of the shoulder hole of pusher cylinder, the first charging ram and the second charging ram are installed in the enlarged diameter section of described shoulder hole from left to right successively, the first charging ram be connected charging ram and be connected with a piston rod of hydraulic cylinder with double piston rods respectively.
Technical scheme of the present invention is: the hydraulic pressure injection is filled the concrete steps of type extrusion casint manufacturing process and is behind the smelting aluminum-magnesium alloy:
Step 1, melting furnace and die along continuous straight runs are set up in parallel on the pusher cylinder, the discharging opening of melting furnace and the charging aperture of die all are communicated with the enlarged diameter section of the shoulder hole of pusher cylinder, punch comes downwards to assigned address under the control of spacing elasticity scale simultaneously, form die cavity between punch and the die, in melting furnace He in the pusher cylinder, all pass into protective gas;
Step 2, the first charging ram is placed the port of the enlarged diameter section of shoulder hole, molten metal is injected in the pusher cylinder, the distance of adjusting between the first charging ram and the second charging ram is injected the volume of molten metal with control, realizes quantitative pouring;
Step 3, molten metal inject complete after, a piston rod of hydraulic cylinder with double piston rods applies the pressure of 40MPa to the first charging ram, another piston rod of hydraulic cylinder with double piston rods applies the pressure of 30MPa to the second charging ram, the first charging ram and the second charging ram horizontal direction under the effect of pressure differential moves, until the shoulder of the second charging ram and shoulder hole leans, the first charging ram seals the melting furnace discharging opening simultaneously, continue discharging to stop, molten metal enters the die cavity that forms between punch and the die propelling under the effect of pressure differential, and liquid metal filling is complete;
Step 4, punch is pressurizeed, pressure is 100MPa, makes molten metal under high pressure solidify and occur plastic deformation, realizes the near-net-shape of product;
Product is taken out in step 5, punch backhaul.
The present invention compared with prior art has following effect:
The present invention combines the hydraulic pressure injection device with melting furnace, utilize the first charging ram and the second charging ram to realize the quantitative pouring of molten metal, when making the strong mechanical performance product, has really realized near-net-shape, and has effectively enhanced productivity.Melting furnace, pusher cylinder and die cavity all seal in the forming process of the present invention; effectively avoided contacting of molten metal and air; and by passing into protective gas; more effectively prevent the oxidation of liquid metal; avoided the impurity in the molten metal to be flowed out by discharging opening; be conducive to improve the quality of product and the mechanical property of product, and then improve the mechanical property of product, the present invention especially is fit to be applied to the shaping of almag easy oxidation metal.
Description of drawings
Fig. 1 is the front overall structure master's cutaway view of liquid metal filling that type extrusion casint building mortion is filled in the hydraulic pressure injection behind the smelting aluminum-magnesium alloy of the present invention, Fig. 2 is that overall structure master's cutaway view behind the liquid metal filling of type extrusion casint building mortion is filled in the hydraulic pressure injection behind the smelting aluminum-magnesium alloy of the present invention, Fig. 3 is overall structure master's cutaway view of hydraulic pressure injection device of the present invention, and Fig. 4 is the side view of melting furnace.
The specific embodiment
The specific embodiment one: in conjunction with Fig. 1 to Fig. 3 present embodiment is described, the hydraulic pressure injection is filled type extrusion casint building mortion and is comprised melting furnace 1, punch 6, spacing elasticity scale 7 and die 8 behind the smelting aluminum-magnesium alloy of present embodiment; Have charging aperture 8-1 on the described die 8, described punch 6 cooperates installation with die 8, form die cavity 13 between punch 6 and the die 8, described spacing elasticity scale 7 is connected between punch 6 and the die 8, be provided with discharging opening 1-1 on the base plate of described melting furnace 1, the hydraulic pressure injection is filled type extrusion casint building mortion and is also comprised hydraulic pressure injection device 12 behind the described smelting aluminum-magnesium alloy, described hydraulic pressure injection device 12 comprises pusher cylinder 3, the first charging ram 5, the second charging ram 11 and hydraulic cylinder with double piston rods 9, have shoulder hole 3-1 along its axis on the described pusher cylinder 3, described melting furnace 1 is set up in parallel on pusher cylinder 3 with die 8 along continuous straight runs, and the discharging opening 1-1 of melting furnace 1 and the charging aperture 8-1 of die 8 all are communicated with the enlarged diameter section of the shoulder hole 3-1 of pusher cylinder 3, the first charging ram 5 and the second charging ram 11, the first charging rams 5 are installed in the enlarged diameter section of described shoulder hole 3-1 from left to right successively and are connected charging ram 11 and are connected with a piston rod 9-1 of hydraulic cylinder with double piston rods 9 respectively.
Spacing elasticity scale 7 is used for the downstream position of control punch 6, makes punch 6 can accurately come downwards to assigned address.
The specific embodiment two: present embodiment is described in conjunction with Fig. 1, Fig. 2 and Fig. 4, the base plate 1-2 of the melting furnace 1 of present embodiment makes one by level board 1-2-1 and parabolic 1-2-2, the link of parabolic 1-2-2 and level board 1-2-1 is lower than the summit O of parabolic 1-2-2, and discharging opening 1-1 is arranged on the parabolic 1-2-2.So arrange, the impurity that exists in the molten metal can be sunken to level board 1-2-1, has avoided the impurity in the molten metal to be flowed out by discharging opening 1-1, affects the quality of product and the mechanical property of product.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment three: present embodiment is described in conjunction with Fig. 1 to Fig. 3, the hydraulic pressure injection is filled type extrusion casint building mortion and is also comprised the first ceramic layer 4 and the second ceramic layer 10 behind the smelting aluminum-magnesium alloy of present embodiment, be provided with on the first charging ram 5 end face relative with the second charging ram 11 on the first ceramic layer 4, the second charging rams 11 end face relative with the first charging ram 5 and be provided with the second ceramic layer 10.So arrange, ceramic layer contacts with molten metal, has resistant to elevated temperatures performance, prevents that molten metal is to the corrosion of charging ram.Other composition is identical with the specific embodiment one or two with annexation.
The specific embodiment four: in conjunction with Fig. 1 to Fig. 3 present embodiment is described, the first ceramic layer 4 of present embodiment and the thickness of the second ceramic layer 10 are 3mm.So arrange, Corrosion Protection is better, and other composition is identical with the specific embodiment three with annexation.
The specific embodiment five: in conjunction with Fig. 1 and Fig. 2 present embodiment is described, the hydraulic pressure injection is filled the concrete steps of type extrusion casint manufacturing process and is behind the smelting aluminum-magnesium alloy of present embodiment:
Step 1, melting furnace 1 and die 8 along continuous straight runs are set up in parallel on pusher cylinder 3, the discharging opening 1-1 of melting furnace 1 and the charging aperture 8-1 of die 8 all are communicated with the enlarged diameter section of the shoulder hole 3-1 of pusher cylinder 3, punch 6 comes downwards to assigned address under the control of spacing elasticity scale 7 simultaneously, form die cavity 13 between punch 6 and the die 8, melting furnace 1 in the pusher cylinder 3 interior protective gas that all pass into;
Step 2, the first charging ram 5 is placed the port of the enlarged diameter section of shoulder hole 3-1, molten metal 2 is injected in the pusher cylinders 3, the distance of adjusting between the first charging ram 5 and the second charging ram 11 is injected the volume of molten metal 2 with control, realizes quantitative pouring;
Step 3, after molten metal 2 injections are complete, a piston rod 9-1 of hydraulic cylinder with double piston rods 9 applies the pressure of 40MPa to the first charging ram 5, another piston rod 9-1 of hydraulic cylinder with double piston rods 9 applies the pressure of 30MPa to the second charging ram 11, the first charging ram 5 and the second charging ram 11 horizontal direction under the effect of pressure differential move, until the shoulder of the second charging ram 11 and shoulder hole 3-1 leans, the first charging ram 5 seals melting furnace 1 discharging opening 1-1 simultaneously, continue discharging to stop, molten metal 2 is being propelled the die cavity 13 that enters formation between punch 6 and the die 8 under the effect of pressure differential, liquid metal filling is complete;
Step 4, punch 6 is pressurizeed, pressure is 100MPa, makes molten metal under high pressure solidify and occur plastic deformation, realizes the near-net-shape of product;
Product is taken out in step 5, punch 6 backhauls.
The hydraulic pressure injection is filled type extrusion casint manufacturing process and is based on hydraulic pressure injection behind the smelting aluminum-magnesium alloy in the specific embodiment one, two, three or four and fills that type extrusion casint building mortion realizes behind the smelting aluminum-magnesium alloy of present embodiment.
The specific embodiment six: in conjunction with Fig. 1 and Fig. 2 present embodiment is described, in the step 1 of present embodiment, the protective gas that passes in melting furnace 1 and in the pusher cylinder 3 is Ar, SF 6Or C 2H 2F 4Other step is identical with the specific embodiment five.

Claims (5)

1. type extrusion casint building mortion is filled in the hydraulic pressure injection behind the smelting aluminum-magnesium alloy, and the hydraulic pressure injection is filled type extrusion casint building mortion and comprised melting furnace (1), punch (6), spacing elasticity scale (7) and die (8) behind the smelting aluminum-magnesium alloy; Have charging aperture (8-1) on the described die (8), described punch (6) cooperates installation with die (8), form die cavity (13) between punch (6) and the die (8), described spacing elasticity scale (7) is connected between punch (6) and the die (8), be provided with discharging opening (1-1) on the base plate of described melting furnace (1), it is characterized in that: the hydraulic pressure injection is filled type extrusion casint building mortion and is also comprised hydraulic pressure injection device (12) behind the described smelting aluminum-magnesium alloy, described hydraulic pressure injection device (12) comprises pusher cylinder (3), the first charging ram (5), the second charging ram (11) and hydraulic cylinder with double piston rods (9), described pusher cylinder (3) is upper to have shoulder hole (3-1) along its axis, described melting furnace (1) is set up in parallel on pusher cylinder (3) with die (8) along continuous straight runs, and the discharging opening (1-1) of melting furnace (1) and the charging aperture (8-1) of die (8) all are communicated with the enlarged diameter section of the shoulder hole (3-1) of pusher cylinder (3), the first charging ram (5) and the second charging ram (11) are installed in the enlarged diameter section of described shoulder hole (3-1) from left to right successively, the first charging ram (5) be connected charging ram (11) and be connected with a piston rod (9-1) of hydraulic cylinder with double piston rods (9) respectively, the base plate (1-2) of melting furnace (1) is made one by level board (1-2-1) and parabolic (1-2-2), the link of parabolic (1-2-2) and level board (1-2-1) is lower than the summit (O) of parabolic (1-2-2), and discharging opening (1-1) is arranged on the parabolic (1-2-2).
2. type extrusion casint building mortion is filled in the hydraulic pressure injection behind the smelting aluminum-magnesium alloy according to claim 1, it is characterized in that: the hydraulic pressure injection is filled type extrusion casint building mortion and is also comprised the first ceramic layer (4) and the second ceramic layer (10) behind the smelting aluminum-magnesium alloy, be provided with the first ceramic layer (4) on the first charging ram (5) end face relative with the second charging ram (11), be provided with the second ceramic layer (10) on the second charging ram (11) end face relative with the first charging ram (5).
3. type extrusion casint building mortion is filled in the hydraulic pressure injection behind the smelting aluminum-magnesium alloy according to claim 2, it is characterized in that: the thickness of the first ceramic layer (4) and the second ceramic layer (10) is 3mm.
One kind fill the smelting aluminum-magnesium alloy that type extrusion casint building mortion realizes based on hydraulic pressure injection behind the smelting aluminum-magnesium alloy claimed in claim 1 after the hydraulic pressure injection fill type extrusion casint manufacturing process, it is characterized in that: the hydraulic pressure injection is filled the concrete steps of type extrusion casint manufacturing process and is behind the smelting aluminum-magnesium alloy:
Step 1, melting furnace (1) and die (8) along continuous straight runs are set up in parallel on pusher cylinder (3), the discharging opening (1-1) of melting furnace (1) and the charging aperture (8-1) of die (8) all are communicated with the enlarged diameter section of the shoulder hole (3-1) of pusher cylinder (3), punch (6) comes downwards to assigned address under the control of spacing elasticity scale (7) simultaneously, form die cavity (13) between punch (6) and the die (8), in melting furnace (1) He in the pusher cylinder (3), all pass into protective gas;
Step 2, the first charging ram (5) placed the port of the enlarged diameter section of shoulder hole (3-1), molten metal (2) is injected in the pusher cylinder (3), the distance of adjusting between the first charging ram (5) and the second charging ram (11) is injected the volume of molten metal (2) with control, realizes quantitative pouring;
Step 3, after molten metal (2) injection is complete, a piston rod (9-1) of hydraulic cylinder with double piston rods (9) applies the pressure of 40MPa to the first charging ram (5), another piston rod (9-1) of hydraulic cylinder with double piston rods (9) applies the pressure of 30MPa to the second charging ram (11), the first charging ram (5) and the second charging ram (11) horizontal direction under the effect of pressure differential move, until the shoulder of the second charging ram (11) and shoulder hole (3-1) leans, the first charging ram (5) seals melting furnace (1) discharging opening (1-1) simultaneously, continue discharging to stop, molten metal (2) is being propelled the die cavity (13) that enters formation between punch (6) and the die (8) under the effect of pressure differential, liquid metal filling is complete;
Step 4, punch (6) is pressurizeed, pressure is 100MPa, makes molten metal under high pressure solidify and occur plastic deformation, realizes the near-net-shape of product;
Product is taken out in step 5, punch (6) backhaul.
5. type extrusion casint manufacturing process is filled in the hydraulic pressure injection behind the smelting aluminum-magnesium alloy according to claim 4, it is characterized in that: in the step 1, the protective gas that passes in melting furnace (1) and in the pusher cylinder (3) is Ar, SF 6Or C 2H 2F 4
CN 201110181119 2011-06-30 2011-06-30 Device and method for hydraulic injection filled type extrusion cast forming of molten aluminum magnesium alloy Active CN102240791B (en)

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CN102581256A (en) * 2012-01-13 2012-07-18 江苏华威线路设备集团有限公司 Aluminum alloy liquid die forging manufacturing process for parts of electrified high-speed railway contact nets
CN102717049A (en) * 2012-06-13 2012-10-10 华南理工大学 Method and device for realizing direct extrusion casting by utilizing closed mould pouring
CN102825240A (en) * 2012-09-26 2012-12-19 镇江市锻压机床厂 Aluminum alloy liquid die forging manufacturing process
CN104190900A (en) * 2014-09-02 2014-12-10 哈尔滨工业大学 Method for casting and forming TiAl-based alloy vent valve
WO2018092088A1 (en) * 2016-11-20 2018-05-24 Dahan Oded Lightweight piston
CN111390139B (en) * 2019-11-28 2021-10-29 刘兴军 Semi-solid forming equipment and process for non-ferrous metal particles
CN113172209A (en) * 2021-04-28 2021-07-27 吉林大学 Controllable pouring extrusion casting device for aluminum alloy
CN113390259B (en) * 2021-06-16 2022-03-25 哈尔滨工业大学 Magnesium alloy smelting and casting integrated device

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