Casting structure of transition frame of coal mining machine
By setting riser units and chillers on the sand core of the coal mining machine transition frame and optimizing the pouring system, the looseness, shrinkage and porosity defects of the transition frame castings are solved, and the casting quality and service life are improved.
CN120696368APending Publication Date: 2025-09-26SHANGHAI TIANDI MINING EQUIP TECH CO LTD +1
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Patent Information
- Application Number
- CN202510971523.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-15
- Publication Date
- 2025-09-26
AI Technical Summary
Technical Problem
Existing steel castings of coal mining machine transition frames are prone to casting defects such as looseness, shrinkage holes and air holes in key stress-bearing parts, which affect the service life and casting quality.
Method used
Multiple riser units, including cylindrical and rectangular risers, are set at key positions of the sand core. Combined with chilled iron and an optimized pouring system, casting defects are resolved by compensating for the shrinkage of the molten metal.
Benefits of technology
It effectively solves the problems of porosity, shrinkage and air holes inside steel castings, improves material density, extends the service life of the transition frame and reduces casting costs.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides a coal mining machine transition frame casting structure, a transition frame comprises a supporting plate used for bearing lifting of a whole machine and transmission of coal mining force in the coal mining process, an oil cylinder connecting lug and a traction connecting lug, the oil cylinder connecting lug and the traction connecting lug are connected with an oil cylinder and a traction device respectively, and the casting structure comprises a sand core body used for forming the transition frame in a pouring mode; the risers are at least arranged on the upper surface of the sand core body and correspond to the oil cylinder connecting lug, the traction connecting lug and the crossed part of the supporting plate and the oil cylinder connecting lug as well as the traction connecting lug. The risers are respectively arranged on the upper surface of the sand core body corresponding to the oil cylinder connecting lug, the traction connecting lug and the crossed part of the supporting plate and the oil cylinder connecting lug as well as the traction connecting lug, so that the shrinkage of molten metal in the casting process can be compensated through the risers in the molten steel pouring process; the casting defects of looseness, shrinkage cavities, air holes and the like generated in a large transition frame steel casting are overcome, and the material density of a transition frame material is guaranteed.
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