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Centrifugal shearing cold-wall semi-solid continuous rheological metal plastic extrusion forming equipment

An extrusion forming, semi-solid technology, applied in the field of centrifugal shear cold wall semi-solid continuous rheological metal plastic extrusion forming equipment, can solve the problem of intergranular segregation, secondary oxidation of semi-solid metal slurry, poor mechanical properties of materials And other issues

Pending Publication Date: 2021-04-27
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, repeated stirring will easily involve the surface layer of metal oxides in contact with the air and oxidized into the metal slurry, which inevitably produces entanglement defects; traditional rheological metal large plastic deformation extrusion molding equipment, semi The preparation of solid metal paste and forming process are carried out separately, which is easy to cause secondary oxidation of the prepared semi-solid metal paste before forming process, further causing involvement defects
Moreover, the prepared slurry has not been fine-grained and supercooled, and the problem of intergranular segregation is prone to occur during the forming process of the extrusion molding equipment, and the mechanical properties of the manufactured material are poor.

Method used

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  • Centrifugal shearing cold-wall semi-solid continuous rheological metal plastic extrusion forming equipment
  • Centrifugal shearing cold-wall semi-solid continuous rheological metal plastic extrusion forming equipment
  • Centrifugal shearing cold-wall semi-solid continuous rheological metal plastic extrusion forming equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as Figure 1-4 As shown, a kind of centrifugal shearing cold wall semi-solid continuous rheological metal plastic extrusion molding equipment provided by the present invention includes: a rheological pulping mechanism and an extrusion mechanism, and the rheological pulping mechanism includes a rheological pulping mechanism including Mixing bucket 10, mounting bracket, splitter cone 9, a plurality of shear rods 8 and the first driving device, the outer wall of the mixing bucket 10 is connected with the mounting bracket through the first bearing 2, and the first bearing 2 can bear the shaft Toward force and radial force, the mixing bucket 10 is provided with a discharge port, the said splitter cone 9 is located in the mixing bucket 10, one end of each shearing rod 8 is fixedly connected to the inner wall of the mixing bucket 10, and each shearing rod 8 is connected to the inner wall of the mixing bucket 10. One end is connected to the side wall of the diverter cone 9...

Embodiment 2

[0033] On the basis of Embodiment 1, in order to obtain a sufficiently large torque, the transmission device and the first drive device are further refined.

[0034] Such as figure 1 with 2 As shown, wherein, a mounting plate 3 and a second bearing seat 22 are also provided between the outer wall of the mixing bucket 10 and the mounting bracket, the mounting plate 3 is fixedly connected with the mounting bracket, and the mounting plate 3 is provided with a through hole, so The discharge port of the mixing bucket 10 extends downward through the through hole, the second bearing seat 22 is fixedly installed at the through hole on the upper surface of the mounting plate 3, and the outer wall of the mixing bucket 10 is fixedly connected with a flange, so The flange is connected with the second bearing seat 22 through the first bearing 2 .

[0035] Such as figure 1 with 2 As shown, wherein the first driving device includes a transmission shaft 4 and a power source, the transmiss...

Embodiment 3

[0038] On the basis of Embodiment 2, since the balance transmission shaft 4 will apply horizontal unilateral pressure to the mixing bucket 10 during transmission, in order to prevent the rotating mixing bucket 10 from vibrating under the unilateral pressure.

[0039] Such as figure 1 with 2 As shown, wherein, the first driving device also includes a synchronous shaft 5, one end of the synchronous shaft 5 is engaged with the side of the disk gear opposite to the second gear through the fourth gear, and the shaft body of the synchronous shaft 5 passes through the third The bearing is connected to the opposite side of the mounting bracket to the transmission shaft 4 .

[0040] Since the synchronous shaft 5 is fixedly connected to the side opposite to the transmission shaft 4 on the mounting bracket, the synchronous shaft 5 plays a supporting role on the mixing drum 10 through the fourth gear teeth, so as to balance the impact of the transmission shaft 4 on the mixing drum 10 dur...

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PUM

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Abstract

The invention discloses centrifugal shearing cold-wall semi-solid continuous rheological metal plastic extrusion forming equipment, and belongs to the technical field of semi-solid metal casting equipment. The forming equipment comprises a rheological slurrying mechanism and an extrusion mechanism. The rheological slurrying mechanism comprises a stirring barrel, a mounting bracket, a sprue spreader, a plurality of shearing rods and a first driving device, 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 to the inner wall of the stirring barrel, the other end of each shearing rod is connected with the side wall of the sprue spreader, the bottom face of the sprue spreader is connected with a liquid blocking umbrella, and a gap is reserved between the edge of the liquid blocking umbrella and the inner wall of the stirring barrel; the first driving device is used for driving the stirring barrel to rotate; and the extrusion mechanism is connected with a forming mold, and the extrusion mechanism can extrude semi-solid continuous rheological metal manufactured by the rheological pulping mechanism into the forming mold. According to the forming equipment, uniform and fine-grain wires, bars and the like with few included slag can be prepared through the efficient and continuous semi-solid slurry preparation process.

Description

technical field [0001] The invention relates to the technical field of semi-solid metal casting equipment, in particular to a centrifugal shear cold wall semi-solid continuous rheological metal plastic extrusion forming equipment. Background technique [0002] Semi-solid metal (SSM) casting technology has experienced more than 20 years of research and development. The stirring casting process is to carry out strong stirring during the solidification process of liquid metal, so that the dendrite network skeleton that is easy to form in ordinary casting is broken to form a dispersed granular structure, thereby making semi-solid molten metal, and then die-casting it into billets or castings. The products produced by this technology have the characteristics of high quality, high performance and high alloying. Compared with ordinary liquid casting, they have many obvious characteristics: the solidification shrinkage of castings is reduced, the dimensional accuracy of castings is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/02
CPCB22D18/02
Inventor 张晋杨大龙白景元管仁国
Owner DALIAN JIAOTONG UNIVERSITY