Force-position coupling micro-motion precision polishing device and online force detection and control method

Abstract

The invention relates to a force position coupling micro-motion precise polishing device and an online force detection and control method, and belongs to the field of machine manufacturing. An X-axis guide rail is fixedly installed on a machine body, and a Y-axis guide rail is installed on a slide carriage of the X-axis guide rail. A slide carriage of the Y-axis guide rail is slidably connected with the Y-axis guide rail. A micro-motion polishing tool system is installed on the slide carriage of the Y-axis guide rail. A Z-axis guide rail is fixedly installed on the machine body. A slide carriage of the Z-axis guide rail is slidably connected with the Z-axis guide rail. A workpiece clamp is fixed to the slide carriage of the Z-axis guide rail. According to the force position coupling micro-motion precise polishing device and the online force detection and control method, three-dimensional movement is provided by a machine, axial and radial micro-motion adjustment of the micro-motion polishing tool system can be achieved, and therefore machining of surfaces of complex workpieces can be achieved; the initial position of a spindle keeps unchanged in the machining process, and the magnitude of contact force of a cutter and the workpieces can be detected online, so that research of the relation of the contact force and the machining quality of the workpieces is facilitated; and meanwhile, control over the contact force of the cutter and the workpieces in the polishing process can be achieved through the micro-motion polishing tool system, and the purpose of improving the machining precision can be well achieved.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, in particular to an online force detection and control method for force-position coupling micro-motion precision polishing. Background technique [0002] Precision machining and ultra-precision machining technology is an important basic guarantee for the development of cutting-edge national defense technology, and is an important technology of strategic significance. However, the precision polishing platform will inevitably have problems such as deformation and unstable mechanical movement. Common polishing machine spindles are rigidly connected to the tool, which is not only difficult to adapt to changes in free-form surfaces, but also difficult to control the surface roughness. During machining, it is usually impossible to obtain the dynamic change of the contact force between the tool and the workpiece during the machining process, and corresponding feedback adjustment cannot be perfor...

AI Technical Summary

Problems solved by technology

However, the precision polishing platform will inevitably have problems such as deformation and mechanical movement instability.

Common polishing machine spindles are rigidly connected to the tool, which is not only difficult to adapt to changes in free-form surfaces, but also difficult to control the surface roughness

During processing, it is usually impossible to obtain the dynamic change of the contact force between the tool and the workpiece during the process, and the corresponding feedback adjustment cannot be performed. In case of unexpected situations such as trajectory planning errors, the contact force between the tool and the workpiece will increase sharply, causing damage to the tool or workpiece

In order to realize the normal feeding of the tool head along the contact point, the existing force-controlled polishing machine tools require at least 4-axis linkage machine tools, which are expensive and complex inverse solutions, and cannot balance positional accuracy and force control accuracy

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