在白车身工艺规划过程中,积累了大量车身焊接工艺数据。为了提取这些知识采用数据挖掘方法发现其中所需的工艺规则。首先采用粗糙集对工艺属性进行约简,删除对工艺决策没有影响的属性;然后采用关联规则挖掘对焊接方法有影响的工艺规则;最后用实例验证了该方法的有效性。 In the white body process planning process, has accumulated a large number of body welding process data. In order to extract this knowledge, the data mining method is used to find out the required process rules. Firstly, the rough set is used to reduce the attributes of the process, and the attributes that have no effect on the process decision are deleted. Then, the rules of the welding process are extracted by the association rules. Finally, an example is given to verify the effectiveness of the method.