Abstract: A deformation-driven solid-phase extrusion device and a one-step alloy bar preparation method by using the same are provided. The device includes a stir tool, an extrusion container and an ejector rod. The stir tool has an integral structure composed of an upper mounting part and a lower working part and having a hollow channel. The lower working part is disposed in a groove of the extrusion container, and the ejector rod is disposed in the hollow channel of the stir tool. The method includes adding alloy powder to the extrusion container, enabling the stir tool to exert a pressure and revolve at a high speed to cause large plastic deformation of the powder and generate heat by friction and deform among powder and the friction working surface of the working part, sintering the alloy powder and extruding the same through the hollow channel of the stir tool.

Abstract: A switching power supply structure includes a housing, a base and circuit boards, where the housing and the base enclose a cavity for accommodating the circuit boards, and a first heat dissipation channel is formed at an opening of the cavity; the housing consists of a top plate and two side plates, and a plurality of heat dissipation holes, including polygonal holes, are reserved in the housing in an array form, which forms a second heat dissipation channel. The first and second heat dissipation channels are provided, with the heat dissipation holes of the second heat dissipation channel having polygonal structures, which enlarges the heat dissipation area, achieving simple structure and good heat dissipation effect. Furthermore, due to the structural optimization of the housing and the base, the automation degree of product assembly is improved, thus lowering the cost of materials for the entire power supply housing structure.

Abstract: A deformation-driven solid-phase extrusion device and a one-step alloy bar preparation method by using the same are provided. The device includes a stir tool, an extrusion container and an ejector rod. The stir tool has an integral structure composed of an upper mounting part and a lower working part and having a hollow channel. The lower working part is disposed in a groove of the extrusion container, and the ejector rod is disposed in the hollow channel of the stir tool. The method includes adding alloy powder to the extrusion container, enabling the stir tool to exert a pressure and revolve at a high speed to cause large plastic deformation of the powder and generate heat by friction and deform among powder and the friction working surface of the working part, sintering the alloy powder and extruding the same through the hollow channel of the stir tool.

Abstract: A friction head and a friction additive manufacturing method of adjusting components and synchronously feeding material are provided. The friction head includes a friction body, a charging part and a feeding part. An axis of the friction body, an axis of the charging part and an axis of the feeding part are coincided with one another. The charging part and the feeding part are sleeved on the friction body. Spiral groove(s) extending in a same direction is formed in an inner ring wall of the feeding part. The spiral groove(s) extends through the inner ring wall of the feeding part and is symmetrical about the axis of the feeding part. The spiral groove(s) and a lower outer surface of the feeding part form spiral feeding channel(s). An upper end of each feeding channel is communicated with a corresponding one of feeding hole(s).