影响排水沟钢模具精度的两大主要因素是：

The two main factors affecting the precision of steel mould for drainage ditch are:

1、排水沟钢模具的变形

1. Deformation of steel mould for drainage ditch

模具受力零件在刚度、强度不足时，会发生弹性变形或塑性变形，降低模具的精度。

When the rigidity and strength of the die are insufficient, the elastic deformation or plastic deformation will occur, and the precision of the die will be reduced.

2、排水沟钢模具磨损

2, drainage ditch steel mold wear

磨损量达到一定程度时，将使制件的尺寸超出公差范围，或使制件产生其他质量问题，标志模具失去了应有的精度。在使用过程中，成型零件的工作表面在直接成型和起模时因与制件材料的摩擦而产生磨损，这种磨损直接导致成型零件的工作尺寸和制件尺寸发生变化。

When the amount of wear reaches a certain extent, the size of the parts will exceed the tolerance range, or cause other quality problems of the parts, indicating that the mold has lost its due precision. During use, the working surface of molded parts in direct molding and mold materials and parts due to friction and wear, the wear directly result in size and size of molding parts change.