摘要
真空铝钎焊工艺所使用的夹具通常采用不锈钢制作。本文研究了精密焊接件的装夹底模板的制造工艺。该底模板材质采用0Cr25Ni20低碳耐热钢,其装夹表面是焊接件的尺寸基准面。由于底模板的尺寸公差将直接影响焊件的钎焊质量,因此,在钎焊加热-冷却过程中应保证底模板有足够的尺寸公差。微小的残余应力是底模板能够满足工作要求的关键因素。由于在焊接和机械加工底模板的过程中,都不可避免的会产生残余应力;因此,应采用合理的加工工艺及方法,才能制作出微应力和高精度的底模板。
The clamp used by vacuum aluminum brazing and soldering often made by stainless steel. Now need to fabri- cate a sophisticated weldment＇s clamping molding base, and the material it used is 0Cr25Ni20 refractory steel. The fixturing surfaces of this molding base are the basic size of the weldment, the working precision of this molding base affects the bra- zing quality of the weldment directly. So the molding base must ensure that it can maintain sufficient precision of dimension during the heating-cooling process while brazing. A micro inner stress level is the key factor of whether the molding base can satisfies the working demands. In the process of brazing and machining the molding base, residual stress is inevitable, thus, reasonable methods of removing stress, or cutting technology should be adopted, so that molding bases with micro stress and high precision can be fabricated.
出处
《新技术新工艺》
2013年第9期84-86,共3页
New Technology & New Process
关键词
铝钎焊
底模板
微应力
aluminum brazing and soldering, molding base, low stress
