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本刊在1984年第四期中译载了改进焊件设计实例五则,现再选择实例七则,介绍给读者(文中的附图尺寸单位均为英寸)。一、允许焊后偏差有时设计者不切实际地对焊接操作确定出精密公差,而对工件不留机加工余量。但是焊接工件的收缩和变形使焊接要获得精密公差难以实现。为了纠正这项设计错误,就要增大吊耳的厚度并允许焊后进行机加工(见图1)。二、简化制配如图2所示,在一个环件上焊接一个突出管件,原来的设计需要在环件中机加工出一个
In the fourth issue of 1984, we published five examples of design examples for improving weldments. We will now select seven examples and introduce them to the readers (the dimensions in the figures are in inches). First, to allow deviation after welding Sometimes designers unrealistic to determine the welding operation precision tolerance, leaving the workpiece without machining allowance. However, the shrinkage and deformation of welded parts make it difficult to achieve precise tolerances. In order to correct this design error, it is necessary to increase the thickness of lifting lugs and allow post-weld machining (see Figure 1). Second, to simplify the system As shown in Figure 2, a ring in the welding of a prominent pipe fittings, the original design needs to be machined in a ring