Side mould structure of gravity casting hub

Abstract

The invention discloses a side mold structure for a gravity casting hub, which comprises a web plate, an upper reinforcing plate and a lower reinforcing plate. The upper reinforcing plate and the lower reinforcing plate are respectively arranged at the upper part and the lower part of the outer wall of the web plate and are fixedly and vertically connected with the web plate; the periphery of the web plate is provided with strengthening tendon-plates, the middle of the strengthening tendon-plates hangs in the air and is separated with the outer wall of the web plate, and the two ends of the strengthening tendon-plates are respectively fixedly connected with the two side ends of the web plate. The strengthening tendon-plates have two or more, and supporting tendons are arranged between and are vertically connected with the strengthening tendon-plates. The side mold structure strengthens the force moment at the two side ends of the side mold, relatively weakens the strength of the middle part and leads the deformation of the side mold caused by heat expansion internal stress to move to the middle. As the deformation of the two side ends of the side mold becomes small, the produced deformation gap is also small. The side mold structure has wide application in the production of the gravity casting automobile hub.

Description

technical field [0001] The invention belongs to a gravity casting wheel hub mold, in particular to a side mold structure of a gravity casting automobile wheel hub mold. Background technique [0002] Automobile wheel molds are generally divided into pressure casting wheel molds and gravity casting wheel molds. Domestic gravity casting wheel molds have been using the mold technology imported from Taiwan but have not been updated and improved. [0003] The traditional gravity casting wheel mold generally includes upper mold, lower mold, side mold and other components. The side mold occupies an important position in the gravity casting wheel mold. figure 1 As shown, it is a traditional gravity casting wheel hub mold. The whole set of mold is mainly composed of side mold 1A, upper mold 2 and lower mold 3, and the center position is the automobile wheel hub 4 corresponding to the mold set. Wherein, side mold 1A left and right each one, as attached figure 2 As shown, it is mainl...

AI Technical Summary

Problems solved by technology

In practice, it is found that during the production process of the mold using this structure, not only is the heat conduction uneven, which leads to difficulty in feeding the RIM part of the automobile hub, but also because the internal stress of the side mold is large under the condition of heating, the side mold is in the mold clamping position. Outward stretching and deformation, which in turn leads to a large gap between the left and right side molds during the working process at the joint gap, and a large amount of aluminum water leaks out of the gap, which is the phenomenon of aluminum leakage in the industry. This very common and serious phenomenon is light. A draped seam with a thickness of at least 2-4mm is formed at the joint gap between the left and right side molds. In severe cases, the aluminum liquid will flow out directly from the gap, which will seriously affect the production process, and the larger the size of the side mold, the more obvious this phenomenon will be.

In the existing production, due to the large thickness of the remaining aluminum seam on the wheel hub, it can only be removed by manual cutting or using a special punching die, and then accurately processed by a lathe, resulting in cumbersome subsequent processing and material There is a lot of waste, and the hub itself has air holes at the seam position, and the density is not enough

Therefore, trying to reduce the amount of aluminum leakage and reduce the residual thickness of the seam is a problem that has been explored but not effectively solved in the current aluminum wheel hub manufacturing process.

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