CN106424630A - Ultrasound-assisted semisolid die-casting molding device and method for complex thin-wall aluminum alloy pieces - Google Patents

Abstract

The invention discloses an ultrasonic-assisted semi-solid die-casting forming device and method for complex thin-walled aluminum alloy parts. Including die-casting machine, die-casting mold, ultrasonic vibration system and cooling system, the die-casting mold is installed on the die-casting machine, the injection component passes through the static mold fixing plate and connected with the die-casting mold, the movable mold of the die-casting mold is installed and connected with the ultrasonic vibration system, and the ultrasonic vibration system It directly acts on the movable mold to perform semi-solid die-casting with ultrasonic assistance. The movable mold is equipped with a cooling system connected to the ultrasonic vibration system. The invention can effectively reduce the degree of solid-phase agglomeration, improve the fluidity and filling capacity of the semi-solid metal, refine the crystal grains, increase the density of the casting, and further improve the mechanical properties and thermal conductivity of the aluminum alloy casting. The manufacture of wall-type aluminum alloy castings provides a new forming method.

Description

Ultrasonic-assisted semi-solid die-casting device and method for complex thin-walled aluminum alloy parts

technical field

The invention relates to the field of semi-solid forming of metal materials, in particular to an ultrasonic-assisted semi-solid die-casting forming device and method for complex thin-walled aluminum alloy parts.

Background technique

In recent years, with the rapid development of information technology and communication industry, complex thin-walled aluminum alloy castings have a wide demand in the electronic communication industry, such as: mobile phone casings, LED lamp radiators, communication base station casings, etc., as shown in Figure 1 Show. Such parts usually have complex cavity structures and thin-walled features. The wall thickness is usually <4.0mm, and the wall thickness in local areas is <0.5mm. In addition, such aluminum alloy castings are often composed of multiple large planes or curved surfaces, which are difficult to achieve by traditional die-casting or cutting methods.

At present, the common manufacturing process of thin-walled aluminum alloy castings is ordinary die casting. Ordinary die casting process occupies a dominant position in the production of aluminum alloy castings, accounting for about 60% of the total aluminum alloy castings. This process can also be used for the forming and manufacturing of some thin-walled castings. However, on the basis of strictly controlling the die-casting process, the die-casting yield of thin-walled aluminum alloy castings is about 80%. Common defects include under-casting, corner cracking, loose structure, cold shut and pattern, etc. resource waste and economic loss. Due to the defects that are prone to occur in thin-walled castings and the limitations of the die-casting process, it is difficult for the ordinary die-casting process to meet the manufacturing and processing of complex thin-walled aluminum alloy castings with a characteristic wall thickness <1.0mm.

In order to improve the aluminum alloy die-casting process and improve the mechanical properties of aluminum alloy castings, the semi-solid die-casting process has received extensive attention in recent years. Semi-solid metal forming is a process between casting and forging. It is a general term for the forming process of semi-melted or semi-solidified metals that coexist in solid and liquid states. It mainly includes thixotropy and rheology. Form two kinds of craft. The semi-solid metal billet has a certain solid-liquid ratio, and its viscosity is higher than that of liquid metal. It can avoid problems such as splashing, turbulence, and entrainment during forming. The performance of the formed part is better than that of the liquid casting; it is compared with solid forging. Low deformation resistance and good flow allow for easier formation of fine features with low forming loads. Therefore, compared with the traditional forming process, semi-solid metal forming better combines the advantages of solid die forging and liquid die casting, and can mass produce micro-components with complex shapes, high performance and high precision.

In the semi-solid metal forming process, the flow stress of metal materials is not only directly affected by the solid phase ratio, but also significantly affected by the degree of solid phase agglomeration. When the degree of solid phase agglomeration is high, the apparent viscosity and flow stress of the semi-solid metal will be significantly increased, thereby reducing its ability to fill thin-walled cavities, which limits the further application and promotion of aluminum alloy semi-solid die-casting technology.

Chinese invention patent (application number 200810058112.7) discloses a semi-solid rheological squeeze casting process and device for hypereutectic aluminum-silicon alloy castings. The device adopts squeeze casting to realize the semi-solid continuous rheological squeeze casting of hypereutectic aluminum-silicon alloy products, which improves the utilization rate of materials and reduces the machining allowance, but it still has large forming force and poor forming effect. It is difficult to meet the molding requirements of complex thin-walled parts.

Chinese invention patent (application number 201410087101.7) discloses a semi-solid continuous forming method for high-silicon aluminum alloy packaging shell. This invention uses the characteristics of segregation and separation of liquid phase and solid phase in semi-solid extrusion forming to prepare and process high-performance thin-walled complex-shaped high-silicon aluminum alloy electronic packaging shells, but the process of this invention is mostly simple shell parts, which is difficult Processing of complex thin-walled aluminum alloy castings with high aspect ratio.

Contents of the invention

The purpose of the present invention is to reduce the degree of solid-phase agglomeration in semi-solid metals, further improve the die-casting performance and quality of thin-walled aluminum alloy castings, and propose an ultrasonic-assisted semi-solid die-casting device for complex thin-walled aluminum alloy castings and method, the introduction of ultrasonic energy field in the die-casting process can effectively reduce the degree of solid phase agglomeration, thereby improving the flow ability and mold filling ability of semi-solid metal, reducing the friction resistance between semi-solid metal and cavity wall, and ultrasonic vibration can fine Crystallization, improve the forming quality of castings.

The technical solution adopted by the present invention to solve its technical problems is:

1. An ultrasonic-assisted semi-solid die-casting device for complex thin-walled aluminum alloy parts:

The invention includes a die-casting machine, a die-casting mold, an ultrasonic vibration system and a cooling system. The die-casting mold is installed on the die-casting machine, the injection assembly is connected to the die-casting mold through the static mold fixing plate, and the ultrasonic vibration system is installed and connected to the movable mold of the die-casting mold. The vibration system directly acts on the movable mold to perform semi-solid die-casting with ultrasonic assistance, and the movable mold is equipped with a cooling system connected with the ultrasonic vibration system.

The die-casting machine includes a base, an injection assembly, a static mold fixing plate, a moving mold fixing plate, a die-casting machine guide post and a die-casting machine guide rail, the injection assembly is fixedly connected to the static mold fixing plate, and the static mold fixing plate is fixed on the base , the movable mold fixed plate can be moved horizontally and installed on the base; the die-casting machine guide rail is installed on the base on the side of the static mold fixed plate, and the bottom of the movable mold fixed plate is embedded in the die-casting machine guide rail; both sides of the static mold fixed plate are fixedly connected with horizontal The guide column of the die-casting machine, the guide column of the die-casting machine passes through the middle of the fixed plate of the die-casting machine, the guide rail of the die-casting machine is parallel to the guide column of the die-casting machine; the fixed plate of the movable mold moves horizontally along the guide rail of the die-casting machine and the guide column of the die-casting machine.

The die-casting mold includes a moving mold and a static mold, the static mold and the moving mold are respectively fixed on the static mold fixing plate and the moving mold fixing plate through the pressure plate assembly, the end face of the static mold fixing plate is connected with an injection assembly, and the static mold is provided with There is a static mold pouring port, and the static mold pouring port is connected with the outlet of the injection component.

The static mold includes a first bolt, a sprue sleeve, a static mold frame, a static mold core and a mold guide sleeve. One end of the static mold frame is fixed on the static mold fixing plate through a pressure plate assembly, and the other end of the static mold frame is There are stepped holes in the four corners of the step hole, and the mold guide pillars for the movable mold are installed in the stepped holes to extend into the mold guide sleeves that are connected; the static mold core is embedded in the middle of the static mold frame, and is fixed with the static mold frame by the first bolt. A through hole is opened in the middle part of the static mold core and the static mold frame, and a sprue sleeve is set in the through hole.

The movable mold includes a movable mold frame, a movable mold core, a mold guide column, a movable mold support plate, a movable mold foot and a second bolt, and the movable mold frame, the movable mold support plate and the movable mold foot The second bolts at the four corners are fixedly connected in sequence. The movable mold core is embedded and fixed in the middle of the movable mold frame. The four corners of the end surface of the movable mold support plate are provided with mold guide posts, and the mold guide posts extend through the movable mold frame. In the mold guide sleeve of the static mold frame of the static mold, an ultrasonic vibration system is fixedly installed on the other end of the movable mold support plate.

The ultrasonic vibration system includes an ultrasonic generator and an ultrasonic vibrator, the ultrasonic vibrator includes an ultrasonic transducer and an ultrasonic horn fixedly installed on the flange, and the four corners of the flange are fixed by connecting rods and first nuts Connected to the end face of the movable mold support plate, the input end of the ultrasonic horn is fixedly connected to the flange plate through a bolt group and passes through the center hole of the flange plate, and the output end of the ultrasonic horn passes through the movable mold support The plate extends into the core of the moving mold; the ultrasonic transducer is fixed on the end face of the input end of the ultrasonic horn through the ultrasonic connecting rod, and piezoelectric ceramics are connected between the ultrasonic transducer and the end face of the input end of the ultrasonic horn; the ultrasonic connection There is a water outlet on the end surface of the rod, and a water inlet is provided at the node position of the ultrasonic horn, and the water outlet and the water inlet are connected with the water cooling system.

The injection assembly includes a injection rod and an injection pipe, the injection rod extends into one end of the injection pipe, the side wall of the injection pipe is connected to the feed port, an injection cavity is formed in the injection pipe, and the injection pipe is another One end passes through the static mold fixing plate and is connected with the static mold, so that the static mold sprue on the static mold is concentrically aligned with the injection cavity outlet.

Since the die-casting process belongs to high temperature and high pressure, in order to prevent the ultrasonic transducer from being damaged due to overheating, a water cooling system 12 is provided on the ultrasonic system. The water cooling system includes a water pump and a water tank, the water inlet is connected to the water tank through the water pump, and the water outlet is directly connected to the water tank.

The device of the present invention applies ultrasonic waves to the die-casting mold through the above-mentioned ultrasonic vibration system, and processes them in the injection cavity through the injection assembly, which can not only improve the fluidity and filling performance of the aluminum alloy semi-solid melt, but also improve the quality of the die-casting parts. mechanical properties.

2. An ultrasonic-assisted semi-solid die-casting method for complex thin-walled aluminum alloy parts:

1) Preparation of semi-solid metal slurry: use pulping equipment to heat the blank to 590°C, and store it in a holding furnace;

2) Preheat the die-casting mold to 150-250°C and spray release agent on the surface, and then close the mold;

3) Turn on the ultrasonic vibration system and the cooling system;

4) The semi-solid slurry is taken from the holding furnace by using the heat preservation quantitative cup, and after pouring into the injection cavity, the injection rod is die-cast at the injection speed of 1-5m/s and the pressure of the specific pressure of 40MPa, and then the pressure is maintained for 5 ~10s, the ultrasonic vibration system and cooling system continue to work during the die-casting process;

5) After the die-casting is completed, open the mold and pick up the parts.

The power of ultrasonic vibration applied by the ultrasonic vibration system is 200W, the frequency is 20KHz and the amplitude is 10μm.

The complex thin-walled aluminum alloy casting is an aluminum alloy casting with a wall thickness of 0.5 mm to 1.5 mm in characteristic size.

The beneficial effects that the present invention has are:

1. The present invention introduces ultrasonic waves into the aluminum alloy semi-solid die-casting process. The ultrasonic system is directly in contact with the movable mold core through the connecting rod combined with the flange structure, and a certain pre-pressure is maintained to ensure that the ultrasonic wave is transmitted with maximum efficiency. to a semi-solid solution,

On the one hand, ultrasonic vibration is used to effectively reduce the degree of solid phase agglomeration, thereby improving the flowability and filling ability of semi-solid metal, and reducing the frictional resistance between semi-solid metal and cavity wall.

On the other hand, ultrasonic vibration can also refine grains and increase the density of castings, thereby improving the mechanical properties and thermal conductivity of aluminum alloy castings;

2. The ultrasonic generator can automatically perform frequency scanning and matching, realize frequency scanning and matching of different molds, and improve the adaptability of the system;

3. The cooling system is set at the node of the horn, which directly cuts off the heat conduction of the mold, improves the cooling efficiency, and does not affect the working frequency of the ultrasonic system.

Description of drawings

Fig. 1 is a schematic diagram of the overall assembly structure of the present invention.

Fig. 2 is a schematic diagram of the mold clamping process of the present invention.

Fig. 3 is a principle diagram of the pouring process of the semi-solid slurry of the present invention.

Fig. 4 is a schematic diagram of the die-casting pressure-holding process of the present invention.

Fig. 5 is a schematic diagram of the process of mold opening and part taking in the present invention.

Fig. 6 is a static mold assembly structure diagram of the present invention.

Fig. 7 is an assembly structure diagram of the movable mold of the present invention.

Fig. 8 is an assembly structure diagram of the ultrasonic system of the present invention.

Fig. 9 is a schematic diagram of the pressing plate assembly of the present invention.

In the figure: 1. Injection rod, 2. Feed port, 3. Static mold fixing plate, 4. Static mold, 5. Moving mold, 6. Ultrasonic vibrator, 7. Moving mold fixing plate, 8. Press plate assembly, 9. Die-casting machine guide post, 10. Die-casting machine guide rail, 11. Ultrasonic generator, 12. Water cooling system, 13. Base, 14. Semi-solid melt, 15. Casting, 16. First bolt, 17. Sprue sleeve , 18. Static mold base, 19. Static mold core, 20. Mold guide sleeve, 21. Dynamic mold base, 22. Dynamic mold core, 23. Mold guide column, 24. Dynamic mold support plate, 25. Movable mold foot, 26. Second bolt, 27. Ultrasonic horn, 28. Connecting screw, 29. Water inlet, 30. Flange, 31. First nut, 32. Piezoelectric ceramics, 33. Ultrasonic transducer Energy device, 34. water outlet, 35. ultrasonic connecting rod, 36. bolt group, 37. pressure plate, 38. second nut, 39. slide rail bolt, 40. third bolt.

detailed description

The present invention will be further described below in conjunction with drawings and embodiments.

As shown in Figure 1, the present invention includes a base 13, a die-casting machine, die-casting molds 4, 5, an ultrasonic vibration system and a cooling system 12, the die-casting machine is installed on the base 13, the die-casting molds 4, 5 are installed on the die-casting machine, and the injection assembly Installed on the die-casting machine and connected with the die-casting molds 4 and 5, the movable mold 5 of the die-casting molds 4 and 5 is installed and connected with an ultrasonic vibration system, the ultrasonic vibration system directly acts on the movable mold 5 to perform semi-solid die-casting with ultrasonic assistance, and the movable mold 5 A cooling system 12 connected to the ultrasonic vibration system is provided.

As shown in Figure 1, the die-casting machine includes a static mold fixed plate 3, a movable mold fixed plate 7, a die-casting machine guide post 9 and a die-casting machine guide rail 10, the static mold fixed plate 3 is fixed on the base 13, and the movable mold fixed plate 7 can be horizontal It is movable and installed on the base 13; the die-casting machine guide rail 10 is installed on the base 13 on the side of the static mold fixed plate 3, and the bottom of the movable mold fixed plate 7 is embedded in the die-casting machine guide rail 10; the two sides of the static mold fixed plate 3 are fixedly connected with horizontal The die-casting machine guide post 9, the die-casting machine guide post 9 passes through the middle part of the movable mold fixed plate 7, the die-casting machine guide rail 10 is parallel to the die-casting machine guide post 9; the movable mold fixed plate 7 runs along the die-casting machine guide rail 10 and the die-casting machine guide post 9 Move horizontally.

The die-casting mold includes a moving mold 5 and a static mold 4, the static mold 4 and the moving mold 5 are respectively fixed on the static mold fixing plate 3 and the moving mold fixing plate 7 through the pressure plate assembly 8, and the end surface of the static mold fixing plate 3 is connected with an injection assembly , the static mold 4 is provided with a static mold pouring port, and the static mold pouring port is connected with the outlet of the injection assembly.

As shown in Figure 6, the static mold 4 includes the first bolt 16, the sprue sleeve 17, the static mold frame 18, the static mold core 19 and the mold guide sleeve 20, and one end of the static mold frame 18 passes through the first bolts 16 at the four corners. Fixed on the static mold fixing plate 3, the four corners of the other end of the static mold frame 18 have blind holes, and the mold guide pillars 23 for the movable mold 5 are installed in the blind holes to extend into the mold guide sleeve 20 for matching connection; the static mold frame In the middle of 18, a static mold core 19 is inlaid and fixed, and a through hole is provided in the middle part of the static mold core 19, and a sprue cover 17 is set in the through hole, and one end of the sprue cover 17 is a static mold sprue.

As shown in Figure 7, the movable mold 5 comprises a movable mold frame 21, a movable mold core 22, a mold guide column 23, a movable mold support plate 24, a movable mold foot 25 and a second bolt 26, the movable mold frame 21, The movable mold support plate 24 and the movable mold foot 25 are fixedly connected in turn by the second bolts 26 at the four corners. The movable mold mold core 22 is embedded and fixed in the middle of the movable mold frame 21, and the four corners of one end surface of the movable mold support plate 24 are set. There is a mold guide post 23, and the mold guide post 23 extends through the movable mold frame 21 into the mold guide sleeve 20 of the static mold frame 18 of the static mold 4, and the other end of the movable mold support plate 24 is fixedly equipped with an ultrasonic The ultrasonic vibrator 6 of the vibration system directly acts on the movable mold core 22 .

As shown in Figure 8, the ultrasonic vibration system includes an ultrasonic generator 11 and an ultrasonic vibrator 6, and the ultrasonic vibrator 6 includes an ultrasonic transducer 33 and an ultrasonic horn 27 fixedly installed on a flange 30, and the flange 30 The four corners are fixedly connected to the end face of the movable mold support plate 24 through the connecting rod 28 and the first nut 31, and the input end of the ultrasonic horn 27 is fixedly connected to the flange 30 through the bolt group 36 and passes through the flange 30 The center hole of the ultrasonic horn 27 extends through the movable mold support plate 24 into the movable mold core 22;

The ultrasonic transducer 33 is fixed on the end face of the input end of the ultrasonic horn 27 through the ultrasonic connecting rod 35, and a piezoelectric ceramic 32 is connected between the ultrasonic transducer 33 and the end face of the input end of the ultrasonic horn 27; There is a water outlet 34 , and the node position of the ultrasonic horn 27 is provided with a water inlet 29 , and the water outlet 34 and the water inlet 29 are connected with the water cooling system 12 .

Ultrasonic generator 11 adopts frequency automatic scanning design, which can adapt to different moulds. The ultrasonic transducer 33 is a piezoelectric transducer, and the piezoelectric ceramic material is PZT-4. The ultrasonic generator 11 adopts the topology of a full-bridge inverter, and uses DSP as the control core of the system to realize automatic frequency scanning , to ensure that the transducer can output at the maximum output power to match different molds.

As shown in Figure 9, the pressure plate assembly 8 includes a pressure plate 37, a second nut 38, a slide rail bolt 39 and a third bolt 40, the pressure plate 37 is provided with a bar-shaped groove, and the second nut 38 passes through the bar-shaped groove to connect the slide rail. Rail bolts 39 and slide rail bolts 39 are embedded in the grooves of the static mold fixing plate 3 or the moving mold fixing plate 7, and one end of the pressing plate 37 is embedded in the strip groove on the side wall of the moving mold foot 25 of the moving mold 5 or the In the strip-shaped groove on the side wall of the static mold frame 18 of the static mold 4, the other end of the pressure plate 37 is supported by the head of the third bolt 40 to the static mold fixed plate 3 or the movable mold fixed plate 7, and the third bolt 40 is adjusted. The elongated length matches the height of the strip groove on the side wall of the mould, and then the second nut 38 is tightened for compression.

The injection assembly includes the injection rod 1 and the injection pipe. The injection rod 1 extends into one end of the injection pipe. The side wall of the injection pipe is connected to the feed port 2. The injection cavity is formed in the injection pipe. One end passes through the static mold fixing plate 3 and is connected to the static mold 4, so that the pouring port of the static mold on the static mold 4 is concentrically aligned with the outlet of the injection chamber.

The water cooling system 12 includes a water pump and a water tank, the water inlet 29 is connected to the water tank through the water pump, and the water outlet 34 is directly connected to the water tank. The cooling system 12 adopts a water-cooling method, which has the advantages of high cooling efficiency and simple installation compared with air-cooling, oil-cooling and other cooling methods. The cooling system 12 is arranged on the ultrasonic horn 27, which effectively blocks the transfer of heat from the die-casting mold to the ultrasonic transducer 32, and the design of the water inlet at the node position reduces the influence on the frequency of the horn.

Concrete implementation process of the present invention is as follows:

1) Preparation of semi-solid metal slurry: heat the blank of aluminum alloy A356 to 590°C with pulping equipment, and store it in a holding furnace;

2) As shown in Figure 2, the die-casting molds of the movable mold and the static mold are preheated to 150-250° C. and the surface is sprayed with a release agent, and then the molds are accurately clamped with the help of the mold guide pillar 23 and the mold guide sleeve 20;

3) Turn on the ultrasonic vibration system and the cooling system, and apply ultrasonic vibration with a power of 200W, a frequency of 20KHz and an amplitude of 10μm.

4) As shown in Fig. 3 and Fig. 4, the semi-solid slurry is taken from the holding furnace by using the thermos quantitative cup, and poured into the injection cavity. The injection speed is 5m/s and the specific pressure is 40MPa for die-casting, and then the pressure is maintained for 5-10s. During the die-casting process, the ultrasonic vibration system and cooling system continue to work;

5) As shown in Figure 5, open the mold, remove the die-cast casting 15, and prepare for the next die-casting.

The device of the invention directly acts on the core of the die-casting mold by ultrasonic vibration, which overcomes the problems of low forming quality and difficulty in producing complex thin-walled parts with high performance requirements in the conventional die-casting method, and solves the problem of complex thin-walled parts with high aspect ratio at present. There are problems and limitations in the forming technology of wall-type aluminum alloy castings in terms of casting quality and production efficiency.

Claims (9)

1. a kind of complex thin-wall class Al-alloy parts ultrasonic wave added semisolid pressure casting shaped device it is characterised in that：Including die casting machine, Die casting (4,5), ultrasonic vibration system and cooling system (12), die casting (4,5) is arranged on die casting machine, die casting The upper installation of the dynamic model (5) of (4,5) connects ultrasonic vibration system, and ultrasonic vibration system directly acts on dynamic model (5) with ultrasonic wave added Carry out semisolid pressure casting molding, dynamic model (5) is provided with the cooling system (12) being connected with ultrasonic vibration system.

2. a kind of complex thin-wall class Al-alloy parts ultrasonic wave added semisolid pressure casting shaped device according to claim 1, its It is characterised by：Described die casting machine include quiet mould fixed plate (3), dynamic mould fixing plate (7), die casting machine guide pillar (9), base (13), Injection assembly and die casting machine guide rail (10), injection assembly is connected with die casting (4,5), injection assembly and quiet mould fixed plate (3) It is fixedly connected, quiet mould fixed plate (3) is fixed on base (13), and dynamic mould fixing plate (7) is movably arranged on bottom horizontally moveablely On seat (13)；Die casting machine guide rail (10) is arranged on the base (13) of quiet mould fixed plate (3) side, dynamic mould fixing plate (7) bottom Embedded die casting machine guide rail (10)；Quiet mould fixed plate (3) both sides are fixedly connected with the die casting machine guide pillar (9) of level, die casting machine guide pillar (9) pass through in the middle part of dynamic mould fixing plate (7), die casting machine guide rail (10) and die casting machine guide pillar (9) are parallel；Dynamic mould fixing plate (7) edge Die casting machine guide rail (10) and die casting machine guide pillar (9) move horizontally.

3. a kind of complex thin-wall class Al-alloy parts ultrasonic wave added semisolid pressure casting shaped device according to claim 1, its It is characterised by：Described die casting includes dynamic model (5) and quiet mould (4), and quiet mould (4) and dynamic model (5) are all by Anchor plate kit (8) It is separately fixed on quiet mould fixed plate (3) and dynamic mould fixing plate (7), quiet mould fixed plate (3) end face is connected with injection assembly, quiet mould (4) it is provided with quiet mould sprue gate, quiet mould sprue gate is connected with the outlet of injection assembly and communicates.

4. a kind of complex thin-wall class Al-alloy parts ultrasonic wave added semisolid pressure casting shaped device according to claim 1, its It is characterised by：Described quiet mould (4) include the first bolt (16), sprue bush (17), quiet mould mould bases (18), quiet mould core rod (19) and Mold guide sleeve (20), quiet mould mould bases (18) one end is fixed on quiet mould fixed plate (3) by Anchor plate kit, and quiet mould mould bases (18) is another The corner of one end has shoulder hole, and shoulder hole stretches into, built with the guide-post of die-set (23) for dynamic model (5), the mould being connected Guide pin bushing (20)；It is inlaid with quiet mould core rod (19) in the middle of quiet mould mould bases (18), fixed with quiet mould mould bases by the first bolt (16), quiet Have through hole in the middle part of mould core rod (19) and quiet mould mould bases (18), in through hole, be cased with sprue bush (17).

Described dynamic model (5) includes dynamic model mould bases (21), dynamic model core rod (22), guide-post of die-set (23), dynamic model gripper shoe (24), moves Mould support block (25) and the second bolt (26), pass through four between dynamic model mould bases (21), dynamic model gripper shoe (24) and dynamic model support block (25) Second bolt (26) at angle is mutually fixedly connected successively, inlays and is fixed with dynamic model core rod (22), dynamic model props up in the middle of dynamic model mould bases (21) The corner of fagging (24) end face is provided with guide-post of die-set (23), and guide-post of die-set (23) extend into described quiet through dynamic model mould bases (21) In the mold guide sleeve (20) of quiet mould mould bases (18) of mould (4), dynamic model gripper shoe (24) other end is installed with supersonic vibration System.

5. a kind of complex thin-wall class Al-alloy parts ultrasonic wave added semisolid pressure casting shaped device according to claim 1, its It is characterised by：Described ultrasonic vibration system includes ultrasonic generator (11) and ultrasonic vibrator (6), and ultrasonic vibrator (6) wraps Include the ultrasonic transducer (33) being fixedly mounted on ring flange (30) and ultrasonic amplitude transformer (27), the corner of ring flange (30) is passed through Connecting rod (28) and the first nut (31) are fixedly attached to described dynamic model gripper shoe (24) end face, the input of ultrasonic amplitude transformer (27) End is fixedly connected on ring flange (30) by bolt group (36) and passes through the centre bore of ring flange (30), ultrasonic amplitude transformer (27) Outfan extend in dynamic model core rod (22) through described dynamic model gripper shoe (24)；

Ultrasonic transducer (33) is fixed on the end face of ultrasonic amplitude transformer (27) input, ultrasonic transduction by ultrasonic connecting rod (35) It is connected with piezoelectric ceramics (32) between device (33) and ultrasonic amplitude transformer (27) input end face；Ultrasonic connecting rod (35) end face has Outlet (34), the node location of ultrasonic amplitude transformer (27) is provided with water inlet (29), outlet (34) and water inlet (29) and water Cooling system (12) connects.

6. a kind of complex thin-wall class Al-alloy parts ultrasonic wave added semisolid pressure casting shaped device according to claim 1, its It is characterised by：Described injection assembly includes injection rod (1) and injection pipeline, and injection rod (1) extend in injection pipeline one end, Injection pipe side wall connects formation injection chamber in charging aperture (2), injection pipeline, and the injection pipeline other end passes through quiet mould fixed plate (3) it is connected with quiet mould (4) so that the quiet mould sprue gate on quiet mould (4) exports concentric alignment with injection chamber.

7. a kind of complex thin-wall class Al-alloy parts ultrasonic wave added semisolid pressure casting shaped device according to claim 1, its It is characterised by：Described water-cooling system (12) includes water pump and water tank, and water inlet (29) connects through water pump and water tank, outlet (34) directly it is connected with water tank.

8. a kind of complex thin-wall class Al-alloy parts ultrasonic wave added semisolid pressure casting forming method is it is characterised in that adopt claim The arbitrary described device of 1-7, comprises the following steps：

(1) semi-solid metal slurry preparation：Using pulping equipment, stock is heated to 590 DEG C, and is incubated in holding furnace Storage；

(2) die casting is preheated to 150～250 DEG C and surface spraying releasing agent, then carries out matched moulds；

(3) described ultrasonic vibration system and described cooling system are opened；

(4) contained from holding furnace using heat preserving quantitative cup and taken semi solid slurry, after pouring into injecting cavity, injection rod is with 1～5m/s Injection speed die casting is carried out with the pressure than pressure 40MPa, then pressurize 5～10s, ultrasonic vibration system and cold in press casting procedure But systems stay work；

(5) mold pickup after the completion of die casting.

9. a kind of complex thin-wall class Al-alloy parts ultrasonic wave added semisolid pressure casting forming method according to claim 8, its It is characterised by：The power that described ultrasonic vibration system applies supersonic vibration is 200W, frequency is 20KHz and amplitude is 10 μm.