【摘要】 金属结合剂金刚石砂轮由于其结合剂的高把持强度,导致砂轮整形极其困难。微细粒度金属结合剂砂轮一般可通过机械、电火花、电化学或激光等某单一整形方式进行整形,但对于粗粒度砂轮来说,由于磨粒尺寸较大,采用上述任一种整形方式都存在一定问题。本文针对粗粒度砂轮多用于高效磨削这一特点提出了一种复合式整形方法:电火花-机械复合整形法,并阐述了该方法的整形机理;此外,还对整形精度起着重要作用的参数———放电间隙与电规准之间的关系进行了试验研究,并通过100/120#青铜结合剂金刚石砂轮的整形试验进行验证。试验结果表明,采用电火花-机械复合整形方法可以实现对粗粒度金属结合剂超硬磨料砂轮的高效整形,整形精度可达6μm以下。更多还原

【Abstract】 The application of metal-bonded super abrasive wheels has provided a solution for grinding of hard and brittle materials.However,the high strength of metal bond of wheels made their truing extremely difficult.Normally metal-bonded wheels with fine grits can be trued using mechanical truing,electro-chemical truing and laser truing.For coarse wheels,due to their relatively large grits,truing can’t be completed only using any individual method mentioned above efficiently.This paper reports a hybrid method,i.e.combining electrical discharge and mechanical truing for bronze-bond diamond wheels,and clarifies its truing mechanism;additionally,the relation between the discharge gap and electrical parameters is studied and applied in the truing of bronze-bonded diamond wheels.The experimental results show that bronze-bonded diamond wheels with coarse abrasive grits can be trued efficiently by this novel hybrid method,and the truing precision can be up to 6 μm or so.更多还原