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传动箱第二轴是拖拉机的一个重要零件,对这根轴的齿面必须进行硬度试验。东方红24Z拖拉机的二轴形状较复杂,是绳长形工件,齿轮呈锥形,在轴的端部,是斜齿面,角度为14°17′,用台式硬度计的一般载样台无法测定。较准确的方法是用切片检查,但很费时,而且是破坏性检查,不适用于实际生产中的硬度检验。为此我们做了一个工夹具(如图所示),把二轴齿轮部分紧贴地装在夹具里,再把这一夹具的支撑面用螺栓拧在硬度计的载样台上,调节螺栓,移动试样,使二轴斜齿面的试验部位在硬度计金刚石压头的圆锥顶尖下面,并与压头垂直。这样测定的硬度,既能做到准确、迅速,又不要破坏零件。
The second shaft of the gearbox is an important part of the tractor and the tooth flank of this shaft must be hardness tested. Dongfanghong 24Z tractor two-axis shape is more complex, is a rope long workpiece, the gear is tapered at the end of the shaft, the helical tooth surface, the angle of 14 ° 17 ’, with a desktop hardness of the general loading platform can not Determination. More accurate method is the use of biopsy, but it is time-consuming and destructive examination, does not apply to the actual production of hardness testing. To do this we have done a fixture (as shown), the two-part gear close fit in the fixture, and then the fixture of the support surface bolted to the hardness of the sample table, adjust the bolt , Move the specimen so that the test site for the biaxial helical surface is below the conical tip of the durometer diamond indenter and is perpendicular to the indenter. This determination of hardness, both to be accurate, rapid, and do not damage the parts.