Pressure-maintaining follow-up technology in pressure casting process and application thereof
A process and pressure technology, applied in the casting process and its application field, can solve the problem that the pressure cannot be continuously followed up, and achieve the effect of good part quality, high production efficiency and good surface quality
Inactive Publication Date: 2013-11-13
SHANGHAI UNIV
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Problems solved by technology
[0003] In order to solve the problems of the prior art, the object of the present invention is to overcome the defects of the prior art, provide a pressure-holding follow-up process and its application in the die-casting process, and overcome the problem that the pressure cannot be continuously followed up in the die-casting process. Reduce defects such as air holes or shrinkage porosity in material molding, and improve the production quality of die castings
Method used
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[0036] Preferred embodiments of the present invention are described in detail as follows:
[0037] In this embodiment, the pressure-holding follow-up process in the die-casting process is applied to realize the pressure-casting process of a 14-inch aluminum alloy wheel hub for a car based on a hydraulic pad single-acting stretching hydraulic press. Press and die structure such as figure 2 As shown, the press includes an upper beam 1, a lower beam 8, a column 6, a plunger cylinder 2, a piston cylinder 3, a press slider 4, a slider fixing groove 5, a press table backing plate 7, a plunger cylinder 9, The hydraulic pad 10 and the ejector pin 11, the mold is composed of the hub mold lower mold 12 and the hub mold upper mold 13, the cavity of the die-casting part is formed between the inner surface of the inner cavity of the hub mold lower mold 12 and the die-casting surface of the hub mold upper mold 13 . see figure 1 and figure 2 , the pressure-holding follow-up process in th...
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The invention discloses a pressure-maintaining follow-up technology in a pressure casting process and an application thereof. In the whole pressure casting process, different pressure casting and ejecting speeds and hydraulic cushion limitation pressures are set in different time periods according to different hydraulic cushion positions; and in the pressure casting process of any time period, any situation in the following situations is finished within the set die assembly pressure-maintaining process: under the condition that the hydraulic cushion ejection pressure is maintained at the hydraulic cushion limitation pressure set at the current time period and the hydraulic cushion can not follow up to achieve a preset position, a press automatically finishes the pressure casting action; when the hydraulic cushion can restrict and follow up to reach the hydraulic cushion position preset at the current time period according to the hydraulic cushion limitation pressure set by the current time period, the pressure casting process in the next time period is continuously carried out until the pressure casting processes of all time periods are finished, and then, a hydraulic cushion stop position pressure-maintaining maintaining action travel is executed. According to the invention, the problem that pressure in the pressure casting can not be continuously followed up is overcome, defects of air holes or shrinkage porosity in material forming are reduced, and the quality of a pressure casting is improved.
Description
technical field [0001] The invention relates to a casting process and its application, in particular to a casting process and its application, which is applied in the technical field of casting metal parts preparation. Background technique [0002] Metal mold casting is a traditional way of casting aluminum alloy wheels, which is suitable for a variety of wheel shapes, especially for large-size wheels. Since there is no pressure during the casting process, conventional casting defects such as shrinkage cavities and shrinkage porosity are prone to occur in the metal mold casting hub, and the mechanical properties of the product are relatively poor. With the development of modern automobile lightweight technology, it is necessary to increase the strength of the hub while reducing the thickness of the hub section, so as to realize the weight reduction of the hub. The die-casting process of aluminum alloy wheels has begun to be applied, such as Wei Xingye's extrusion casting pr...
Claims
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Inventor 王武荣韦习成赵玉璋王炜李萌张磊
Owner SHANGHAI UNIV