One-step forming mold for large camshaft of engine

Abstract

The invention relates to a one-step forming mold for a large camshaft of an engine. The one-step forming mold comprises a sprue gate, an X-shaped sprue, M cross gates communicating with the X-shaped sprue, and M cavity areas which are in one-to-one correspondence with the M cross gates and communicate with the M cross gates, wherein M is a natural number, and the cross gates are perpendicular to the cavity areas and communicate with the cavity areas through slow flow cavities. The one-step forming mold for the large camshaft of the engine is particularly suitable for casting the large camshaft, the production capacity can be improved, the product yield can be increased, and the casting percent of pass can be increased.

Description

technical field [0001] The invention relates to the field of casting, in particular to a mold for a large camshaft of an engine. Background technique [0002] The camshaft is an important component in a piston engine. Its function is to control the opening and closing of the valve. Because the valve movement law is related to the power and running characteristics of an engine, the camshaft design plays a very important role in the engine design process. At present, most of the camshafts are manufactured by casting to produce the blanks of the camshafts. The casting efficiency of the blank will directly affect the tact of the production line, production capacity, and the efficiency of key personnel. In order to maximize the production capacity of the camshaft, the camshaft is usually cast in multiple pieces at one time. In the existing camshaft multi-piece casting process, the camshaft castings are generally arranged side by side, and the production process is complicated....

AI Technical Summary

Problems solved by technology

In the existing camshaft multi-piece casting process, the camshaft castings are generally arranged side by side, and the production process is complicated. In order not to affect the performance of the castings, casting 10 pieces at a time is the limit

The arrangement of multiple camshafts results in a long flow path for the molten iron, and the time it takes for the molten iron to flow into the sand mold after pouring is different. The temperature difference between the molds is relatively large, and the difference between the highest temperature and the lowest temperature can reach more than 100 degrees Celsius. , so that there is a large difference in the solidification and cooling time of molten iron, resulting in fluctuations in the mechanical properties (tensile strength, endurance, impact resistance) of the camshaft blank, and affecting the uniformity of the quality of the blank

[0003] The existing patent document 2018101381390 is a multi-piece casting process and casting mold for an engine camshaft. Its main structure is to maximize the use of space in the 820*820 frame, arrange as many parts as possible, and finally arrange a 16-piece process, but this mold can only cast small and medium-sized camshafts, and is not suitable for casting large camshafts, which will cause problems such as low mold utilization, poor product quality, and low production efficiency, which need to be improved urgently

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