Research On Part Error Feedback Correction Technology Based On Polishing Processing Principle

Progress in industrial production has increased the demand for large-scale and highprecision machine parts.For example,in marine equipment,rail transportation,aerospace and other industries,large-scale and super-large-scale structural components are common.Largescale machine tools are the main equipment for processing this kind of products.The accuracy of the machine tool directly determines the accuracy of the parts.The precision of the machine tool guide rail is a key link that affects the machining accuracy of the machine tool.Improving the guide rail accuracy of large machine tools is of great significance to the production of highquality large-scale parts and components.Most large-scale machine tools guide rails are several meters or even tens of meters long.Due to the long parts,slight variations in the processing conditions during the machining process may cause shape errors on the surface of the parts.The main error defects are burrs and rugged projections or dents.In order to eliminate these errors,the current measure is to manually scrape with a scraper to achieve the workpiece size,geometry,surface roughness,and adhesion specified by the process.However,the use of manual scraping methods is extremely inefficient.And the quality of the scratched surface is not guaranteed.Therefore,it is necessary to study the finishing technology for large machine tool guides and other parts.Grinding is a process of grinding and polishing the surface defects of mechanical parts.Its main purpose is to improve the surface roughness.In view of the problems existing in the processing of large guide rails,this project applies the grinding and polishing technology to machine tool guide rails and proposes a machining method for error correction based on the feedback of the surface error of the parts during the process of grinding and polishing the parts.The main research work is as follows:1.In order to clarify the influencing factors of the removal amount in the grinding and polishing process,this paper establishes a fixed-point polishing and traverse polishing model based on the characteristics of the polishing process,which provides a theoretical basis for the later experimental exploration.2.In this paper,a cast iron specimen with a size of 500mm×50mm×45mm was used to simulate the research object,and a grinding and grinding processing experimental platform was set up to design a fixed-point polishing experiment to obtain the rule of the removal of different types of sandpaper over time,and the different specifications of sandpaper's Wear factor.3.Based on fixed-point polishing experiments,a cast iron specimen with a size of 500 mm × 15 mm × 45 mm was used as a simulation object.A traverse polishing experiment was designed to verify the machining effect,and the main factors influencing the traverse polishing effect were explored.The results show that the traverse polishing is an effective processing method for correcting the surface error of large parts,and machine traverses initial velocity and acceleration have a significant effect on the polishing effect.