Citic Dicastal Co., Ltd

Naizheng Hu

Jinling Yang

Li Yang

Jiansheng Wang

Zhihua Zhu

Shiwen Xu

Lixin Huang

Weizhou Liu

Xiaoting Zhu

Liguang Xie

Jingru Shen

Zeyun Ma

The disclosure discloses a high-speed spinning magnesium alloy and a preparation method thereof, the magnesium alloy has Mg&#x2014;Al&#x2014;Zn&#x2014;Mn&#x2014;Sr alloy with a high formability and high strength, and its chemical composition mass percentage is: Al: 2.4-4.5 wt. %; Zn: 0.6-1.2 wt. %; Mn: 0.4-0.6 wt. %; Sr: 0.15-0.3 wt. %; the balance is Mg. The present disclosure adopts the principle that by increasing the content of Mn in the magnesium alloy, a large amount of Mn-rich phase is generated during the alloy preparation process, and the degree of subcooling is controlled so that a fine spherical dispersed nano-scale Mn-rich phase is obtained during the solidification process. The nano-scale Mn-rich precipitate phase can pin the grain boundaries and inhibit the grain boundary migration to refine grains and achieve the effect of improving the strength. The divorced eutectic MgAlphase generated during the casting process will deteriorate the structure, so Sr is added to the alloy, Sr combining with Al to suppress the coarse phase of divorced eutectic MgAl, refine the grains, increase the amount of eutectic, and reduce the risk of thermal cracking of large-size cast bars. In addition, Sr weakens the texture during the high-temperature spinning forming process and reduces the risk of cracking during the spinning tension, which is beneficial to high-speed spinning forming.

Magnesium alloy, preparation method thereof, and process for preparing wheels by using the magnesium alloy

A wheel automatic closed die forging production line includes a sawing machine, a first transfer track, a bar heating furnace, a first manipulator, an oscillating rolling machine, a second manipulator, a primary forging hydraulic machine, an intermediate heating furnace, a third manipulator, a finish forging hydraulic machine, a wheel transfer block, a fourth manipulator, a cutting, expanding and punching hydraulic machine, a second transfer track, a spinning machine, a fifth manipulator, a third transfer track, a heat treatment furnace, a fourth transfer track, a machining unit, a sixth manipulator and a fifth finished product track, and can improve mechanical and the physical properties of the wheel product, the wheel forging effect and the yield. Aluminum and magnesium alloy wheel compression molding is realized, reducing cost, time and labor for secondary machining and reshaping, and improving production safety and efficiency.

Wheel automatic closed die forging production line and aluminum alloy wheel

Disclosed is a multifunctional adjustable drilling machine. Supporting leg seats are connected with a frame, the frame is connected with a bottom plate, the bottom plate is connected with driller supports, the bottom plate is provided with holes and positioning pins matched with the driller supports, the angles of driller support index plates can be adjusted, drillers machine holes in an automobile die casting at different angles, and a compression cylinder bracket and a compression cylinder support are connected to the bottom plate. A compression plate is connected to a piston rod of a compression cylinder, the compression cylinder is arranged on the compression cylinder support, and motors drive belt pulleys and conveying belts to rotate so as to drive main shafts of the drillers to rotate. The automobile die casting is positioned by a clamp body, and the compression plate clamps the automobile die casting via the compression cylinder.

Multifunctional adjustable drilling machine

The invention discloses an improved automobile hub lathe fixture. A central positioning pin () is arranged in a fixture body center sleeve, wheel lip positioning pins () are arranged on the same pitch circle of a fixture body, clamping jaws () are connected to supports () via hinge pins (), the supports () and the fixture body () frame are casted into a whole, connecting screws () are fixed at the lower ends of the clamping jaws () via connecting nuts (), lifting pins () are arranged in guide sleeves, the bottoms of the clamping jaws () are connected to a fixture body frame by tension springs (), a three-leaf disc cam () is arranged on top half of the gear rotating shaft (), the gear rotating shaft () is arranged in a guide sleeve () of the fixture body frame, and a rack ejector rod () is connected with a cylinder (). The improved automobile hub lathe fixture can save the manpower and materials and further improve the production efficiency.

Automobile hub lathe fixture

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Qinhuangdao, China

Naizheng Hu