小型犁耙式混料机控制系统的数控化改造研究
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摘要
犁耙式混料机是一种在研制刹车片、闸瓦等摩擦衬片时经常用到的设备,但小型犁耙式混料机仅具有定时功能,使得混料速度、混料时间无法同步调节设定。通过分析混料过程中混料机对组分物料的物理搅拌作用机理及其性能影响,得出了混料工艺的典型工艺参数;以PLC为控制单元,分别进行了典型、非典型混料工艺的程控化设计改造,并通过试验台对其进行了验证。结果表明,所设计的小型犁耙式混料机控制系统可以实现对搅拌电机混料转速、混料时间的准确控制,满足混料工艺要求,为小型混料机的数控化改造提供了一种技术参考。
The rake blender is usually used to mix composition of plates and brake blocks but the compact rake blender only has timing function,which result in that the blending time and speed cannot be set synchronously. The mechanism of mixing action and influence on mechanics were respectively analyzed in blending process and the typical blending craft was obtained; the numerical control transformation of typical and non-typical blending crafts was designed by taking PLC as control unit. They were examined by the means of test bench. It is indicated that the designed control system of the compact rake blender can adjust the blending speed and time,which satisfied the craft requirement. And it provided a technical reference for numerical control transformation of rake blender.
The rake blender is usually used to mix composition of plates and brake blocks but the compact rake blender only has timing function,which result in that the blending time and speed cannot be set synchronously. The mechanism of mixing action and influence on mechanics were respectively analyzed in blending process and the typical blending craft was obtained; the numerical control transformation of typical and non-typical blending crafts was designed by taking PLC as control unit. They were examined by the means of test bench. It is indicated that the designed control system of the compact rake blender can adjust the blending speed and time,which satisfied the craft requirement. And it provided a technical reference for numerical control transformation of rake blender.
引文
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[2]王野.包覆混料工艺对混合尺寸强化粒子Si Cp/Fe复合材料性能影响的研究[D].沈阳:东北大学,2014.
[3]SURAPPA MK.Synthesis of Fly Ash Particle Reinforced A356 Alcomposites and Their Characterization[J].Materials Science and Engineering A,2008,480(1):117-124.
[4]卢健,高文理,苏海,等.搅拌铸造法制备Si Cp/A356铝基复合材料的研究[J].铸造设备研究,2009(4):15-17.
[5]程世伟,刘颖耀,孟令奇,等.搅拌工艺对Si Cp/A356复合材料中Si C颗粒分布及性能的影响[J].上海金属,2017,39(02):5-9.
[6]沈茹娟,孙超,宋旼,等.混料时间和挤压对Si C增强纯Al基复合材料显微组织和力学性能的影响[J].粉末冶金材料科学与工程,2012,17(05):604-610.
[7]钟林燕,罗玉红,徐志勇,等.影响干法造粒粉料性能的因素[J].佛山陶瓷,2014,24(07):25-27.
[8]吴国中,邓嘉,朱旭平.西门子PLC对步进电动机的控制[J].自动化技术与应用,2006,25(09):28-30.