Automatic complex curved surface forced-controlled high shear low pressure grinding device and machining method thereof

Abstract

The invention discloses an automatic complex curved surface forced-controlled high shear low pressure grinding device and a machining method thereof, and belongs to the technical field of complex curved surface grinding of difficult-to-machine materials. The grinding device comprises a pedestal, a stand column, an industrial robot, an electric spindle, a force-controlled floating knife handle, a workpiece clamping device, a grinding disc, a six-dimensional force sensor, a rotary workbench, a three-axis precision displacement workbench, a safety shield, a safety door and a base; the grinding disc comprises a grinding disc substrate, a pressure plate, a liner layer and an abrasive layer; and all the modules effective communicate with one another. A control system is used for signal collection and processing and command transmission, and automatic force-controlled grinding of complex curved surfaces is achieved; the shear thickening effect is achieved through the grinding disc abrasive layer, and materials are removed in a high shear low pressure grinding mode; and limitations of traditional machining methods are overcome, and automatic force-controlled precision grinding machining ofthe complex curved surfaces is achieved in the high shear low pressure grinding mode.

Description

technical field [0001] The invention relates to a complex curved surface grinding technology for difficult-to-machine materials, and in particular provides an automatic complex curved surface force-controlled high-shear low-pressure grinding device and a processing method thereof. Background technique [0002] With the rapid development of science and technology, the requirements for material performance in the fields of machinery, electronics, communication, optics, energy, aerospace and other fields are increasing day by day. A large number of new difficult-to-process materials with high High-strength steel, engineering ceramics, etc.) continue to emerge, but also pose new challenges to the precision / ultra-precision machining of materials. Grinding, as an important technical means of precision / ultra-precision machining, accounts for about 30% to 40% of the total machining, and is widely used. During the grinding process of difficult-to-machine materials, there are general...

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Problems solved by technology

Coordinated movement of industrial robots, rotary table, and three-axis precision displacement table realizes automatic grinding of complex curved surfaces; the grinding disc is installed on a six-dimensional force sensor, and cooperates with the force-controlled floating tool holder to realize The precise control of the grinding force achieves the effect of constant force grinding; the grinding disc using the shear thickening effect is proposed, and according to the shape of the continuous grinding and intermittent grinding area of ​​the grinding disc, it can be divided into flat grinding disc, Fan-shaped grinding discs, Archimedes spiral grinding discs and hyperbolic grinding discs, when the abrasive layer contacts the surface of the workpiece, the abrasive will produce a "cluster effect" to increase the tangential grinding force and normal grinding force The high-shear and low-pressure grinding method removes the micro-convex peaks on the surface of the workpiece, effectively solving a series of problems such as low material removal rate, grinding burns, and poor surface integrity in the grinding process of complex curved surfaces, and further improving processing efficiency. and processing quality

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