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Stirring friction extrusion method and device based on stirring needle

A friction stir and extrusion device technology, applied in ceramic extrusion dies, ceramic molding machines, manufacturing tools, etc., can solve the problems of composition segregation, separation of reinforcing phase and matrix metal and grain growth, and achieve stable structure and performance. Effect

Active Publication Date: 2019-07-19
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is easy to cause the separation of the reinforcement phase and the matrix metal, as well as the grain growth and composition segregation during the cooling process of the material.

Method used

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  • Stirring friction extrusion method and device based on stirring needle
  • Stirring friction extrusion method and device based on stirring needle
  • Stirring friction extrusion method and device based on stirring needle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1As shown, the friction stirring extrusion device based on the stirring pin 101 in this embodiment includes a base 15, on which a mold 23 assembly 13, an extruding assembly and a lifting assembly are arranged, and the mold 23 assembly 13 includes a mold 23 and is arranged on the mold 23. The cover plate 22, the mold 23 and the anvil 12 are connected by fasteners, and the anvil 12 and the base 15 are connected by fasteners. A feeding trough is provided between the mold 23 and the cover plate 22, and a prefabricated body 21, the cover plate 22 is provided with a through hole communicating with the mold stirring area 232, the feeding trough communicates with the mold stirring area 232, the base 15 is provided with a cavity corresponding to the mold outlet 231 at the bottom of the mold 23, and the side wall of the cavity is provided with There is a viewing window 14; the extruding assembly includes a box body 7, a horizontal first screw mandrel arranged in th...

Embodiment 2

[0051] Such as Figure 5 As shown, this embodiment provides a friction stir extrusion device based on the stirring needle 101. On the basis of the first embodiment, the friction stir extrusion device based on the stirring needle 101 in this embodiment also has the following characteristics: the mold 23 is The polygonal mold 2423 is provided with multiple groups of feed grooves. Each set includes two slots. Multiple sets of different materials can be mixed simultaneously during extrusion. In the specific operation process, according to the properties of the required materials, the materials in the grooves of the mold 23 can be mixed and extruded in stages. For example, materials with different functions are placed in the first feed tank 241 , the second feed tank 242 , and the third feed tank 243 , and materials with different functions can be obtained according to the order of feeding. For example, one functional material can be obtained according to the feeding sequence of...

Embodiment 3

[0053] Such as Figure 6-10 As shown, this embodiment provides a friction stir extrusion device based on the stirring needle 101. On the basis of the first embodiment, the friction stir extrusion device based on the stirring needle 101 in this embodiment also has the following characteristics: the mold 23 adopts Split mold 26, so that when the size of the stirring hole in the mold stirring zone 232 meets the requirements; The split mold 26 and the mold 23 support 17 are a transition fit, and the feed groove of the split mold 26 is slightly larger than the feed groove of the mold 23 support 17. Figure 7 It is a schematic diagram of the three-dimensional structure of the split mold 26 in the present invention. Such as Figure 8-10 As shown, the shape of the split die outlet 261 is circular, and may also be square or flower-shaped, and different cross-sectional shapes can meet the special requirements of different extrusion materials on the cross-section.

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Abstract

The invention discloses a stirring friction extrusion device based on a stirring needle. A base is provided with a die assembly, an extrusion assembly and a lifting assembly. The die assembly comprises a die and a cover plate. A feeding trough is arranged between the die and the cover plate. A preformed body is arranged in the feeding trough. The feeding trough communicates with a die stirring zone. The position, corresponding to a die outlet at the bottom of a die, of the base is provided with a cavity. The extrusion assembly comprises a box body, a horizontal first screw rod rotationally arranged in the box body, a movable sliding block and a first driving device. The movable sliding block is provided with an extrusion rod directly facing the feeding trough. The lifting assembly comprises a bracket, a second screw rod, a sliding block and a second driving device. A spindle box is fixedly connected with the sliding block. The spindle box is provided with a third driving device capableof driving a spindle to rotate. The bottom end of the spindle is connected with a stirring head directly facing the die stirring zone. The stirring head is provided with the stirring needle. Throughthe stirring friction extrusion method and device based on the stirring needle, sufficient stirring, mixing and extrusion forming of composites are achieved.

Description

technical field [0001] The invention relates to the technical field of material forming, in particular to a stirring pin-based friction stirring extrusion method and device. Background technique [0002] The rapid development of science and technology has put forward higher and higher requirements on the performance of materials. Traditional materials already have certain limitations, such as low elastic modulus of aluminum alloy, large thermal expansion coefficient, and low thermal conductivity of titanium alloy. Metal matrix composites have become the research focus of many enterprises and research institutes because of their high specific strength, specific stiffness and high temperature performance. [0003] The preparation process is a key factor affecting the performance and application of composite materials. In the previous preparation methods, such as stirring casting method, the matrix metal is first melted, and then a reinforcing phase such as CNTs, SiC particles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/20B22F1/00B29C48/30B29C48/36B29C48/86B29C48/87B28B3/20B28B3/26
CPCB22F1/0003B22F3/20B28B3/20B28B3/26B28B3/2654B29C48/30B29C48/36B29C48/865B29C48/87
Inventor 刘强柯黎明胡锦扬刘奋成
Owner NANCHANG HANGKONG UNIVERSITY
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