阅读说明：本技术 一种半固态金属浆料制备装置及方法 (Semi-solid metal slurry preparation device and method ) 是由 张晋 杨大龙 白景元 管仁国 于 2020-12-25 设计创作，主要内容包括：本发明公开了一种半固态金属浆料制备装置及方法,属于半固态连续流变金属铸造设备技术领域。该成形设备包括：搅拌桶、安装支架、分流锥、多个剪切棒和驱动装置,搅拌桶外壁通过第一轴承与安装支架连接,每个剪切棒一端固连于搅拌桶内壁,每个剪切棒另一端与分流锥侧壁连接,分流锥的底面连接有挡液伞,挡液伞的边缘与搅拌桶内壁留有间隙,驱动装置用于驱动搅拌桶转动。本发明的一种半固态金属浆料制备装置旨在把大量浆料分成连续的小量浆液,制备出的半固态浆料有效的降低了卷入性缺陷的含量,所制备出的半固态浆料在后续成型加工中可能有效降低晶间偏析的含量。(The invention discloses a device and a method for preparing semi-solid metal slurry, and belongs to the technical field of semi-solid continuous rheological metal casting equipment. The forming apparatus includes: the stirring barrel comprises a stirring barrel, a mounting bracket, a spreader cone, a plurality of shearing rods and a driving device, wherein the outer wall of the stirring barrel is connected with the mounting bracket through a first bearing, one end of each shearing rod is fixedly connected with the inner wall of the stirring barrel, the other end of each shearing rod is connected with the side wall of the spreader cone, the bottom surface of the spreader cone is connected with a liquid blocking umbrella, a gap is reserved between the edge of the liquid blocking umbrella and the inner wall of the stirring barrel, and the driving device is used for driving the stirring barrel to. The semi-solid metal slurry preparation device provided by the invention aims to divide a large amount of slurry into continuous small amount of slurry, the prepared semi-solid slurry effectively reduces the content of the involvement defect, and the prepared semi-solid slurry can effectively reduce the content of intergranular segregation in the subsequent forming processing.)

1. A semi-solid metal slurry preparing apparatus, comprising: a mixing tank (10), a mounting bracket, a spreader cone (9), a plurality of shearing rods (8) and a driving device, the outer wall of the stirring barrel (10) is connected with the mounting bracket through a first bearing (2), the stirring barrel (10) is provided with a discharge hole, the spreader cone (9) is arranged in the stirring barrel (10), one end of each shearing rod (8) is fixedly connected with the inner wall of the stirring barrel (10), the other end of each shearing rod (8) is connected with the side wall of the spreader cone (9), a plurality of shearing rods (8) are arranged in the stirring barrel (10) in a staggered manner, the bottom surface of the spreader cone (9) is connected with a liquid blocking umbrella (6), a gap is reserved between the edge of the liquid blocking umbrella (6) and the inner wall of the stirring barrel (10), the driving device is fixedly connected to the mounting support and used for driving the stirring barrel (10) to rotate around the axis of the driving device, and the driving device is electrically connected with the power module.

2. The semi-solid metal slurry preparation device according to claim 1, wherein a mounting plate (3) and a bearing seat (12) are further arranged between the outer wall of the stirring barrel (10) and the mounting bracket, the mounting plate (3) is fixedly connected with the mounting bracket, the mounting plate (3) is provided with a through hole, a discharge port of the stirring barrel (10) penetrates through the through hole to extend downwards, the bearing seat (12) is fixedly mounted at the through hole on the upper surface of the mounting plate (3), the outer wall of the stirring barrel (10) is fixedly connected with a flange, and the flange is connected with the bearing seat (12) through the first bearing (2).

3. The semi-solid metal slurry preparation apparatus according to claim 2, wherein the driving means comprises a transmission shaft (4) and a power source, the transmission shaft (4) is connected to one side of the mounting bracket through a second bearing, one end of the transmission shaft (4) is in toothed connection with the power source through a first gear, the power source is electrically connected to the power module, a disk gear is further fixedly connected to the outer wall of the stirring barrel (10), and the disk gear is in toothed connection with the other end of the transmission shaft (4) through a second gear.

4. A semi-solid metal slurry manufacturing apparatus according to claim 3, wherein the driving means further comprises a synchronizing shaft (5), one end of the synchronizing shaft (5) is geared to the disk gear at a side opposite to the second gear through a third gear, and a shaft body of the synchronizing shaft (5) is coupled to the mounting bracket at a side opposite to the driving shaft (4) through a second bearing.

5. The semi-solid metal slurry preparation device according to claim 2, wherein the rheological pulping module further comprises a bearing protection sleeve (11) and a protection screen (1), the edge of the bearing protection sleeve (11) is fastened on the bearing seat (12), the flange of the outer wall of the stirring barrel (10) and the first bearing (2) are arranged in the bearing protection sleeve (11), the protection screen (1) is fixedly connected to the upper surface of the bearing protection sleeve (11), and the stirring barrel (10) is arranged in the protection screen (1).

6. The semi-solid metal slurry preparation apparatus according to claim 1, wherein the outer wall of the stirring barrel (10) is further fixedly connected with an air guide cover (7), and the air guide cover (7) is used for guiding the air flow to the outer wall of the stirring barrel (10).

7. A semi-solid metal slurry manufacturing apparatus as set forth in claim 3, wherein said disk gear is a herringbone-toothed or helical-toothed disk gear.

8. A semi-solid metal slurry manufacturing apparatus according to claim 1, wherein the first bearing (2) is capable of withstanding axial and radial forces.

9. A method of preparing a semi-solid metal slurry using the semi-solid metal slurry preparation apparatus of claim 1, comprising:

s01: starting a power supply and starting a driving device;

s02: pouring the metal melt into a stirring barrel (10);

s03: the metal melt is separated by the shunting cone (9), the shearing rod (8) starts to rotate under the driving of the stirring barrel (10), and the separated metal melt is repeatedly beaten and sheared by the rotating shearing rod (8);

s04: the beaten and sheared metal melt falls to the surface of the liquid blocking umbrella (6) under the action of gravity, and is thrown to the inner wall of the stirring barrel (10) under the centrifugal force of the liquid blocking umbrella (6);

s05: the metal melt on the inner wall of the stirring barrel (10) is cooled to be in a semi-solid state;

s06: the semi-solid metal melt flows out of the discharge port under the influence of gravity.

Technical Field

The invention relates to the technical field of semi-solid continuous rheological metal casting equipment, in particular to a semi-solid metal slurry preparation device and method.

Background

Semi-solid metal (SSM) casting technology has been studied and developed for over 20 years. The stirring casting process is to stir strongly in the solidification process of liquid metal to break the dendritic network skeleton easy to form in common casting to form dispersed granular structure form, so as to prepare semi-solid metal liquid, and then to die-cast the semi-solid metal liquid into blank or casting. The product produced by the technology has the characteristics of high quality, high performance and high alloying, and has a plurality of obvious characteristics compared with the common liquid casting: the solidification shrinkage of the casting is reduced, the dimensional precision of the casting is high, the appearance quality is good, the machining amount is small, the productivity is high, and the mechanical property is good.

However, in the casting process of semi-solid metal (SSM), the involved defects and intergranular segregation are easily generated, and the mechanical properties of the material are seriously affected by the involved defects and the intergranular segregation. The inclusion defect is mainly generated in the preparation process of the semi-solid slurry, and the intergranular segregation is generated in the solidification forming process of the semi-solid slurry. Both the origin of the entanglement defect and intergranular segregation are related to the preparation of the semi-solid slurry.

The traditional stirring type semi-solid pulping equipment cools the molten metal slurry into the semi-solid metal slurry through repeated mechanical stirring and heat dissipation. However, the repeated stirring tends to cause the metal oxide, which is in contact with the air at the surface layer and undergoes an oxidation reaction, to be entangled in the metal slurry, and an entanglement defect is inevitably generated; and the prepared slurry is not subjected to fine grain strengthening and supercooling treatment, and the problem of intercrystalline segregation is easily caused in the subsequent forming process.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides a semi-solid metal slurry preparation device and a semi-solid metal slurry preparation method.

The invention not only provides a semi-solid metal slurry preparation device, comprising:

agitator, installing support, spreader cone, a plurality of shearing stick and drive arrangement, the agitator outer wall through first bearing with the installing support is connected, axial force and radial force can be born to first bearing, the agitator is equipped with the discharge gate, in the agitator was located to the spreader cone, every shearing stick one end all linked firmly in the agitator inner wall, every shearing stick other end all with the spreader cone lateral wall is connected, a plurality of shearing stick high-low straggles to be arranged in the agitator, the bottom surface of spreader cone is connected with and keeps off the liquid umbrella, the edge that keeps off the liquid umbrella leaves the clearance with the agitator inner wall, drive arrangement link firmly in on the installing support, drive arrangement is used for driving the agitator and rotates around self axis, drive arrangement is connected with the power module electricity.

Preferably, the outer wall of the stirring barrel and the mounting bracket are also provided with a mounting plate and a bearing seat, the mounting plate is fixedly connected with the mounting bracket, the mounting plate is provided with a through hole, the discharge port of the stirring barrel penetrates through the through hole and extends downwards, the bearing seat is fixedly mounted at the through hole on the upper surface of the mounting plate, the outer wall of the stirring barrel is fixedly connected with a flange, and the flange passes through the first bearing and is connected with the bearing seat.

Preferably, drive arrangement includes transmission shaft and power supply, the transmission shaft pass through the second bearing connect in installing support one side, transmission shaft one end is through first gear and power supply toothing, the power supply is connected with the power module electricity, and the agitator outer wall has still linked firmly a dish gear, a dish gear passes through second gear and transmission shaft other end toothing.

Preferably, the driving device further comprises a synchronizing shaft, one end of the synchronizing shaft is connected to one side of the disc gear opposite to the second gear through a third gear, and a shaft body of the synchronizing shaft is connected to one side of the mounting bracket opposite to the transmission shaft through a second bearing.

Preferably, the rheological pulping module further comprises a bearing protection sleeve and a protection screen, the edge of the bearing protection sleeve is fastened on the bearing seat, the flange on the outer wall of the stirring barrel and the first bearing are arranged in the bearing protection sleeve, the protection screen is fixedly connected to the upper surface of the bearing protection sleeve, and the stirring barrel is arranged in the protection screen.

Preferably, the outer wall of the stirring barrel is fixedly connected with an air guide cover, and the air guide cover is used for guiding the air flow to the outer wall of the stirring barrel.

Preferably, the disk gear is a herringbone gear or a helical gear.

Preferably, the first bearing is capable of withstanding axial and radial forces.

The present invention also provides a method for preparing a semi-solid metal slurry, comprising:

s01: starting a power supply and starting a driving device;

s02: pouring the metal melt into a stirring barrel;

s03: the metal melt is separated by the shunting cone, the shearing rod starts to rotate under the driving of the stirring barrel, and the separated metal melt is repeatedly beaten and sheared by the rotating shearing rod;

s04: the beaten and sheared metal melt falls to the surface of the liquid blocking umbrella under the action of gravity, and is thrown to the inner wall of the stirring barrel under the centrifugal force of the liquid blocking umbrella;

s05: the metal melt on the inner wall of the stirring barrel is cooled to be in a semi-solid state;

s06: the semi-solid metal melt flows out of the discharge port under the influence of gravity.

Compared with the prior art, the invention has the beneficial effects that: the purpose is to divide a large amount of slurry into continuous small amount of slurry by utilizing the shearing rod, and break and throw the small amount of slurry to the side wall of the stirring barrel for rapid cooling in sequence, thereby avoiding the roll-in defect caused by repeated stirring of metal slurry for cooling. And moreover, a small amount of slurry is smashed by the shearing rod to play a role in fine grain strengthening, and the smashed small amount of slurry can be rapidly cooled by the side wall of the stirring barrel, so that the content of intergranular segregation can be effectively reduced in the subsequent extrusion forming process. The method for preparing the semi-solid metal slurry can prepare the semi-solid metal slurry with low content of the coiling defect and low content of the intergranular segregation.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a partial cross-sectional view of the present invention;

description of reference numerals:

1. the device comprises a protective net cover, 2 parts of a first bearing, 3 parts of a mounting plate, 4 parts of a transmission shaft, 5 parts of a synchronizing shaft, 6 parts of a liquid blocking umbrella, 7 parts of a wind guide cover, 8 parts of a shearing rod, 9 parts of a spreader cone, 10 parts of a stirring barrel, 11 parts of a bearing protective sleeve, 12 parts of a bearing seat and 13 parts of a first gear.

Detailed Description

Detailed description of the preferred embodimentsthe following detailed description of the present invention will be made with reference to the accompanying drawings 1-2, although it should be understood that the scope of the present invention is not limited to the specific embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Example 1:

as shown in fig. 1-2, the present invention provides a semi-solid metal slurry preparing apparatus, comprising: agitator 10, installing support, spreader 9, a plurality of shear bar 8 and drive arrangement, 10 outer walls of agitator through first bearing 2 with the installing support is connected, axial force and radial force can be born to first bearing 2, agitator 10 is equipped with the discharge gate, spreader 9 is located in agitator 10, and 8 one ends of every shear bar all link firmly in 10 inner walls of agitator, and every 8 other ends of shear bar all are connected with the 9 lateral walls of spreader, and 8 high-low straggles of a plurality of shear bar arrange in agitator 10, and the bottom surface of spreader 9 is connected with fender liquid umbrella 6, keep off the edge of liquid umbrella 6 and leave the clearance with 10 inner walls of agitator, drive arrangement link firmly in on the installing support, drive arrangement is used for driving agitator 10 to rotate around self axis, and drive arrangement is connected with the power module electricity.

The working principle of example 1 is now briefly described:

and starting the power supply, starting the driving device, and pouring the metal melt into the stirring barrel 10. The driving device drives the stirring barrel 10 to rotate, the metal melt is separated by the shunting cone 9, the shearing rod 8 starts to rotate under the driving of the stirring barrel 10, and the separated metal melt is repeatedly beaten and sheared by the rotating shearing rod 8, so that the effects of crushing dendritic crystals and refining grains can be achieved. The beaten and cut metal melt falls to the surface of the liquid blocking umbrella 6 under the action of gravity, and the metal melt is thrown to the inner wall of the stirring barrel 10 under the centrifugal force of the liquid blocking umbrella 6. Because the outer wall of the stirring barrel 10 is subjected to the air cooling effect, the barrel wall of the stirring barrel 10 is cooled, and therefore the metal fluid on the inner wall of the stirring barrel 10 can be rapidly conducted and cooled to be in a semi-solid state. The semi-solid metal melt flows out of the discharge port under the influence of gravity.

The invention relates to a semi-solid metal slurry preparation device, which aims to divide a large amount of slurry into continuous small amount of slurry by using a shearing rod 8, sequentially smash the small amount of slurry and throw the small amount of slurry to the side wall of a stirring barrel 10 for rapid cooling, and avoid the entanglement defect caused by repeated stirring of metal slurry for cooling. And moreover, a small amount of slurry is smashed by the shearing rod to play a role in fine grain strengthening, and the smashed small amount of slurry can be rapidly cooled by the side wall of the stirring barrel, so that the content of intergranular segregation can be effectively reduced in the subsequent extrusion forming process.

Example 2:

on the basis of embodiment 1, in order to obtain a sufficiently large torque, the transmission and the drive are further refined.

As shown in fig. 1 and 2, wherein, the outer wall of the stirring barrel 10 with still be equipped with mounting panel 3 and bearing frame 12 between the mounting bracket, mounting panel 3 links firmly with the mounting bracket, and mounting panel 3 is equipped with the through-hole, the discharge gate of stirring barrel 10 passes through the through-hole downwardly extending, bearing frame 12 fixed mounting is in mounting panel 3 upper surface through-hole department, the outer wall of stirring barrel 10 has linked firmly the flange, the flange passes through first bearing 2 is connected with bearing frame 12.

As shown in fig. 1 and 2, wherein, drive arrangement includes transmission shaft 4 and power supply, transmission shaft 4 through the second bearing connect in installing support one side, 4 one ends of transmission shaft are through first gear and power supply toothing, the power supply is connected with the power module electricity, and agitator 10 outer wall has still linked firmly the dish gear, the dish gear passes through second gear and 4 other end toothings of transmission shaft.

The power supply passes through first gear drive transmission shaft 4, and transmission shaft 4 passes through the second gear and rotates with dish gear drive agitator 10, and the first bearing frame 12 is supported through mounting panel 3 to the installing support, and first bearing frame 12 supports agitator 10 through first bearing 2. Through gear drive, can transmit big enough moment of torsion, can also promote transmission efficiency and response speed.

Example 3:

on the basis of embodiment 2, since the balance transmission shaft 4 applies a horizontal one-side pressure to the mixing drum 10 during the transmission process, the mixing drum 10 is prevented from vibrating under the one-side pressure.

As shown in fig. 1 and 2, the driving device further includes a synchronizing shaft 5, one end of the synchronizing shaft 5 is geared to the side of the disk gear opposite to the second gear through a third gear, and a shaft body of the synchronizing shaft 5 is connected to the side of the mounting bracket opposite to the transmission shaft 4 through a second bearing.

Because synchronizing shaft 5 links firmly the one side relative with transmission shaft 4 on the installing support, consequently synchronizing shaft 5 plays the supporting role to agitator 10 through fourth gear tooth to balanced transmission shaft 4 is the unilateral pressure of the horizontal direction that applies to agitator 10 in the transmission process, thereby can prevent to rotate agitator 10 and cause vibrations under unilateral pressure.

As a preferable scheme, as shown in fig. 1 and 2, the rheological pulping module further includes a bearing protection sleeve 11 and a protection screen 1, the edge of the bearing protection sleeve 11 is fastened to the bearing seat 12, the flange on the outer wall of the stirring barrel 10 and the first bearing 2 are disposed in the bearing protection sleeve 11, the protection screen 1 is fixedly connected to the upper surface of the bearing protection sleeve 11, and the stirring barrel 10 is disposed in the protection screen 1. The bearing protection sleeve 11 and the protection net cover 1 can play a good role in protecting an operator.

As a preferable scheme, as shown in fig. 1 and 2, a wind scooper 7 is further attached to an outer wall of the mixing tank 10, and the wind scooper 7 is used for guiding the airflow to the outer wall of the mixing tank 10. The air guide cover 7 can guide the air flow to the outer wall of the stirring barrel 10 more efficiently, so that the heat dissipation efficiency of the barrel wall of the stirring barrel 10 is improved.

As a preferred solution, as shown in fig. 1 and 2, wherein the disk gear is a herringbone-tooth or helical-tooth disk gear. The herringbone gear or helical gear disk gear transmission is more stable, and the stirring barrel 10 can be effectively prevented from moving up and down.

As a preferred solution, as shown in fig. 1 and 2, the first bearing 2 can withstand axial and radial forces. The first bearing 2, which can simultaneously bear the axial force and the radial force, can prevent the agitator 10 from vibrating when rotating.

The present invention also provides a method for preparing a semi-solid metal slurry, comprising:

s01: starting a power supply and starting a driving device;

s02: pouring the metal melt into a stirring barrel 10;

s03: the metal melt is separated by the shunting cone 9, the shearing rod 8 starts to rotate under the driving of the stirring barrel 10, and the separated metal melt is repeatedly beaten and sheared by the rotating shearing rod 8;

s04: the beaten and cut metal melt falls to the surface of the liquid blocking umbrella 6 under the action of gravity, and the metal melt is thrown to the inner wall of the stirring barrel 10 under the centrifugal force of the liquid blocking umbrella 6;

s05: the metal melt on the inner wall of the stirring barrel 10 is cooled to be in a semi-solid state;

s06: the semi-solid metal melt flows out of the discharge port under the influence of gravity.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.