The invention relates to a whole casting method of the central trough of a scraper conveyor, which belongs to the field of low alloy and high strength cast steel sand mold casting. Includes the following steps: the casting sand casting process design characteristics of middle trough casting structure, a square hole is arranged on the bottom plate; plate is provided with an anti deformation reinforcement, sand test model use the size of each part of other core testing, qualified after box; low alloy cast steel material smelting component qualified, inclined casting. High strength low alloy cast steel material used, the alloy elements mainly Si, Mn, C = 0.35%, Si+Mn = 2.5%, B, Ti, Nb to add trace elements such as CE, the carbon equivalent of less than or equal to 0.68%, welding, repair materials, normalizing + quenching and low temperature tempering, normalizing after removal the anti deformation reinforcement plate. Material properties: tensile strength of Rm is larger than 1300MP, the impact toughness of KV2 is larger than 25J, with better wear resistance than imported wear resistant plate Hardox400. Sand casting process solves the problem of large deformation, low density and so on. The production process is relatively simple, and the material can be welded and repairable, which reduces the overall cost of the central trough.
【技术实现步骤摘要】
刮板输送机中部槽的整体铸造方法
本专利技术涉及一种刮板输送机中部槽的整体铸造方法,具体为低合金高强度铸钢、砂型铸造工艺,属于铸造领域。
技术介绍
煤矿机械设备井下工作环境恶劣,大多数是在高速、重载、振动、冲击、摩擦的工况下工作,刮板输送机是采煤工作面的关键设备之一,中部槽是输送机上使用量和消耗量最大的部件,传统中部槽为铸焊结构,主体结构由铸造槽帮与中、底板组焊而成,为解决传统铸焊结构中部槽不耐磨、焊缝开裂、寿命低的问题,一些企业开发了整体铸造无焊接中部,整体铸造中部槽采用高强耐磨合金、消失模铸造工艺整体铸造而成,与传统铸焊结构中部槽相比其耐磨性好,无焊缝开裂现象,使用寿命长,但消失模铸造工艺铸造大型铸钢件变形严重,后期需娇形,铸件密实度低,所采用的高强耐磨合金焊接、修复困难,其热处理工艺为盐浴等温淬火工艺,虽然此工艺比较成熟,但生产设备一次性投资高,生产过程能耗高,污染严重,总体制造工艺复杂,成本较高。而目前国内铸造行业80%以上的产品都是砂型铸造完成,铸造槽帮也均为砂铸工艺生产,消失模整铸中部槽本身的工艺限制与所用的高强耐磨合金材料不可焊接、修复的缺点制约了整体 ...
【技术保护点】
刮板输送机中部槽的整体铸造方法,其特征是:中部槽采用砂型铸造工艺整体铸造而成,铸件材质为低合金高强度铸钢,可焊接,可修复。
【技术特征摘要】
1.刮板输送机中部槽的整体铸造方法,其特征是:中部槽采用砂型铸造工艺整体铸造而成,铸件材质为低合金高强度铸钢,可焊接,可修复。2.根据权利要求1所述的刮板输送机中部槽的砂型铸造方法,其特征是:根据砂型铸造工艺的特点设计中部槽铸件结构,底板上设置方孔;中板上设置防变形拉筋,正火后去除防变形拉筋。3.根据权利要求1所述的一种刮板输送机中部槽的砂型铸造方法,其特征是:造型下芯后使用砂型检验样板检测各部位尺寸,合格后合箱;冶炼合格...
【专利技术属性】
技术研发人员:穆润青,李海,李凤敏,付胜敏,刘志成,张彦斌,董建勇,
申请(专利权)人:中煤张家口煤矿机械有限责任公司,
类型:发明
国别省市:河北,13
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