Dynamic Compensation Method for CNC Crankshaft Grinding Machine

Crankshaft journal size errors are unavoidable during the machining process, and limiting them within a certain range is crucial to ensuring the overall precision of the engine. When comparing domestically produced crankshaft grinding machines with those from abroad, it is evident that while the processing accuracy is similar, there is a significant gap in terms of processing stability. By analyzing the characteristics of the online measurement instrument and grinding process matching in crankshaft grinding, a simple online monitoring method for journal size errors is proposed. A dynamic error compensation method is proposed for such size errors, allowing the machine tool to automatically adjust the compensation amount to achieve self-adaptation and self-matching for the online measurement instrument and dimensional tolerances. Experimental verification shows that this method can significantly improve the dimensional error accuracy of the machine tool, meeting the needs of most customers in the market.