Guangdong Hongtu Technology Co.

Hongtu, China

Guangdong Hongtu Technology Co.

Hongtu, China

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Li B.,Chongqing University | You G.,Chongqing University | You G.,National Engineering Research Center for Magnesium Alloy Materials | Long S.,Chongqing University | And 3 more authors.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2010

The rivet forming process was investigated by numerical simulation and point-tracking method based on the connecting technology between the aluminum alloy workpiece and the steel plate. Dynamic change of stress-strain at every point in deformation area and damage distribution of the deformation area were analyzed, which provided a theoretical basis for the study and design of the riveting process.


Zhang B.,Guangdong Hongtu Technology Co. | Liu X.,Guangdong Hongtu Wuhan Die Casting Co. | Wan L.,Guangdong Hongtu Technology Co. | Wang X.,Guangdong Hongtu Technology Co. | And 2 more authors.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2016

The mechanical properties of the die castings is greatly related with the cavity vacuum. The performances of the die castings prepared under different vacuums which was subject to T1; T5 and T6 heat treatment were investigated. The results indicate that the elongation of the castings fabricated by high vacuum die casting (cavity vacuum of 91~94 kPa) is 2.3 times of ones fabricated by high pressure die casting; after T1 treatment; compared with that of ones fabricated by low vacuum die casting (cavity vacuum of 65~70 kPa); yield strength of the high vacuum die casting specimen is increased by 64.2%; and the elongation of the specimen produced by high vacuum die casting(HVDC) reaches 8.4% with T5 treatment. After T6 treatment; the yield strength and elongation of the HVDC castings reach 339.8 MPa and 6.7%; respectively. © 2016, Journal Office of Special Casting and Nonferrous Alloys. All right reserved.


Zhang B.,Guangdong Hongtu Technology Co. | Liu X.,Guangdong Hongtu Wuhan Die Casting Co. | Wan L.,Guangdong Hongtu Technology Co. | Wang X.,Guangdong Hongtu Technology Co. | And 2 more authors.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2016

The content of gas in the die castings could be reduced by vacuum die casting (VDC), so the castings fabricated by VDC can be subjected to the high temperature short time heat treatment with steady dimension and absence of blisters on the surface. With Mg concent of 2.1%, the elongation of the die castings reaches up to 6%. The tensile strength of the as-cast alloy is increased with increasing in contend of Mg, where the yield strength of the die casting reaches up to 163 MPa with 0.65% Mg content. After the artificial aging, with the Mg content of 0.89%, the tensile strength of the alloy is 356. 2 MPa. © 2016, Journal Office of Special Casting and Nonferrous Alloys. All right reserved.


Zhang C.,Tsinghua University | Li P.,Tsinghua University | Zhang B.,Guangdong Hongtu Technology Co. | Huang Z.,Guangdong Hongtu Technology Co.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2014

With the rapid development of technologies of mechanical automation, automatic units are widely used for pressure die casting. However, the production management capacity for the machine needs to be improved. The most efficient way is to develop remote monitor system for the die casting units. Combined with information management requirement, the development and application of remote monitor system was introduced, including communication mode between die casting machine and ancillary equipment, remote monitor system design proposal, software implementation and the application estimation. Remote monitor terminal can communicate with the device based on industrial Ethernet and OPC technology. The result indicates that the system can find the substandard products caused by unstable injection.


Zhang B.,Guangdong Hongtu Technology Co. | Jia C.,Chongqing University | Li L.,Chongqing Changan Automobile Co. | Cao H.,Chongqing University
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2015

The change of Si, Cu distribution in vacuum HPDC Al-Si-Cu alloys samples (50% vacuum degree) with solution treated at different time was observed and analyzed by optical microscope, SEM, EDS, XRD. Results indicate that Si phase in the vacuum HPDC samples with solution treated 2 h at 500 ℃ has satisfied size and distribution morphology and surface blister is less than 100 μm. The finer eutectic Si particle can be generated in the vacuum HPDC samples compared with common HPDC samples. After solution treated at 500 ℃ for 0.5 h, Cu elements are dissolved into matrix partly to be homogenized, then its distribution is related with Si phase change. ©, 2015, Journal Office of Special Casting and Nonferrous Alloys. All right reserved.


Xu F.,Guangdong Hongtu Technology Co. | An Z.,Guangdong Hongtu Technology Co. | Wan L.,Guangdong Hongtu Technology Co. | Wang X.,Guangdong Hongtu Technology Co. | And 3 more authors.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2016

Filling and solidification as well as defect distribution of a aluminum alloy die casting structure parts were analyzed by the numerical simulation. The gating-exhausting system for the structure parts was optimized. Based on the self-developed high vacuum die casting technology, effects of vacuum degree in filling process on microstructure and mechanical properties of the structure parts were investigated. The results reveal that high pressure die casting can reduce greatly the gas content in the structure and improve the relative density of the parts. Compared with those of the conventional vacuum die casting, tensile strength, yield strength, elongation and hardness of the structure parts are increased by 21%, 29%, 18%, 10% respectively. © 2016, Journal Office of Special Casting and Nonferrous Alloys. All right reserved.


Zhang B.,Guangdong Hongtu Technology Co. | Jia C.,Chongqing University | Li L.,Chongqing Chang an Automobile Co. | Han J.,Chongqing Chang an Automobile Co. | Cao H.,Chongqing University
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2015

The Magma software was used to predict the gas pressure in vacuum die casting filling process and gas entrapment in vacuum die casting engine cylinder block. Through the microstructure observation, CT scanning, mechanical properties test and density measurement, influences of the vacuum die casting on engine cylinder block casting quality was analyzed to understand effects of density on properties of engine block. The results reveal that the vacuum can reduce the gas pressure inside the cavity during filling process and improve gas entrapment, meanwhile, the vacuum die casting process can reduce the porosity in die castings, improving structure density and the casting properties effectively. ©, 2015, Journal Office of Special Casting and Nonferrous Alloys. All right reserved.


Guo G.,Tsinghua University | He L.,Tsinghua University | Li P.,Tsinghua University | Zhang C.,Tsinghua University | An Z.,Guangdong Hongtu Technology Co.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2016

The communication interfaces supported by some remote monitor system include OPC interface, DDE interface and ODBC interface. After comparison, OPC interface was regarded as the most suitable one for the communication between system and external programs. In order to develop the client of the remote monitoring system, OPC automation interface specification and three methods of data access were analyzed. Finally, client of the remote monitor system was developed through OPC interface and programming language Visual Basic. After installing the software, computers in the network could exchange data with the remote monitor system to display the status of the die casting unit. © 2016, Journal Office of Special Casting and Nonferrous Alloys. All right reserved.


An Z.,Guangdong Hongtu Technology Co. | Wan L.,Guangdong Hongtu Technology Co. | Huang Z.,Guangdong Hongtu Technology Co. | Chen L.,Guangdong Hongtu Technology Co. | And 2 more authors.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2015

Numerical simulation method was adopted to predict the filling process of liquid aluminum alloy and defect distribution in the die casting aluminum alloy side cover of gear-box and then to optimize the gating-exhaust system, so the development time of die casting die was shortened significantly. Meanwhile, during mould-trial and production-trial, origination of different defects from the casting process and mould were analyzed, and countermeasures were presented. The results show that a reasonable casting-exhaust system and the cooling system are the keys to obtain high-quality die castings. ©, 2015, Journal Office of Special Casting and Nonferrous Alloys. All right reserved.


An Z.,Guangdong Hongtu Technology Co. | Wan L.,Guangdong Hongtu Technology Co. | Huang Z.,Guangdong Hongtu Technology Co. | Luo Z.,Guangdong Hongtu Technology Co.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2015

Filling and defects distribution in the die casting aluminum alloy sump were predicted, and origination of the defects generation during trial mould and trial production process was described. The gating and exhausting system was modified based on result analysis, so the sump quality was improved with decrease of mould developing cycles. The results reveal that they are the key factors, such as rational pouring parameters and exhausting system as well allowance, for obtaining high quality aluminum alloy sump. ©, 2015, Journal Office of Special Casting and Nonferrous Alloys. All right reserved.

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