水喷射切削的新进展

如今的水喷射切削产生的压力为3870kg/cm^2,在集中、高速生产线上,能实现不间断,经济加工。以下几种特性使磨粒水喷射切削在许多实际应用中优于其它传统方法: (1)工作温度低,免除了诸如激光加工和等离子切削等设备产生的热影响区和变形现象,因而不需要付出很高的代价对热影响区表面进行研磨、退火或二次加工得到成品尺寸。(2)喷射切削时几乎没有横向力或垂直力,所以也不产生振动。

水喷射切削机理

水喷射切削是一种极有前途的加工工艺。一股极细、高速、不带或带有磨粒的水流就象激光一样切割被加工材料,并带走在加工过程中产生的切削热,使工件表面产生的扭曲最小。喷射切割时的切口极窄,即材料的损耗极小,加工的零件可很紧密地贴着嵌套。此外,零件的已加工表面光洁度极高,足以免去精加工工序。水喷射切削的最大特点是加工成本低廉,大约1.

机器人化的水喷射切削系统

机器人控制的金属或非金属工件水力喷射切割系统,其加工灵活性(柔性)要比通常的冲压切削和手工精整大得多,而且可进行精确的三维加工。由于不需设计,制作费时和费钱的专用工夹具,因而改变现有产品或制作新产品都非常简便。 实际使用表明,用机器人化的水力喷射切削系统切削诸如加泡沫里衬的乙烯塑料、聚丙烯及其它塑料、橡胶、皮革。

Regeneration of grinding wheel active surface using high-pressure hydro-jet

The possibility of applying a high-pressure hydro-jet for renewal of the grinding wheel cutting ability was presented.This work was conducted in the internal cylindrical grinding process of the Titanium Grade 2 alloy,which belongs to the group of hard-to-cut materials.The analysis shows that the impact on the erosion effectiveness of the grinding wheel active surface(GWAS)depends upon the hydro-jet inclination angle and working pressure.Experimental results reveal that application of hydro-jet working pressure of 25 MPa allows for effective cleansing of the grinding wheel surface.Depending on the initial GWAS condition and the level of its smearing with chips of machined material,it is possible to increase the number of grinding wheel unevenness apexes by as much as 4.5 times.