Who Are We?
Hunan Amazon Machinery Co., Ltd
Hunan Amazon Machinery Co., Ltd. is a professional manufacturer for machinery parts production. It’s founded in 2008, covers an area of 36000 square meters, the existing staff are more than 300 people. Our company wins a good reputation among users by virtue of scientific production technology, strict quality management and advanced service concept, has been certified to UKAS and ISO9001: 2008 Quality Management System, and has obtained the rights of self-managed import and export. Under the guidance of the company’s goal to enterprises bigger and stronger, Amazon actively develop the hydraulic flange, SAE flange, fluid control, auto parts, engineering machinery parts, iron and steel casting and other business areas, and formed a unique competitiveness. We supply the products to Liugong, ZOOMLION, Dalian heavy industry and Anshan Iron and Steel Group and other enterprises. And export to Europe, USA, Japan and other areas.
Forging is a kind of process method which exerts pressure to metal material with metal forming machine to make it plastic deformation to get the casting of specific mechanical performance, shape and dimension. It is one of the two parts of forging and pressing. Through forging, the defects of loose cast condition of metal generated during smelting process can be eliminated and the micro structure of the metal can be improved.
Coefficient of thermal expansion of copper and aluminum differ greatly. Than the thermal expansion coefficient of aluminum is about 36% that of copper, in the transition joint heating copper material will be squeezed and not fully recover after cooling. Thus, in the long run Lengrebujun term repeated temperature changes (e.g., power and power, a small load and a large load, alternating hot and cold weather, etc.), the contact surface tends to have a greater impact gap the contact area, resulting in poor contact of the contact resistance increases further.
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