Visual servo feeding special-shaped spiral curved surface screw abrasive belt polishing device and method

Abstract

The invention discloses a visual servo feeding special-shaped spiral curved surface screw abrasive belt polishing device which comprises a lathe bed and further comprises an abrasive belt driving mechanism, a screw feeding mechanism, a binocular vision collecting mechanism and a data processing unit. The invention discloses a visual servo feeding abrasive belt polishing method for a special-shaped spiral curved surface screw. The method comprises the steps that (1) a whole machine is installed, and a camera is calibrated; 2) acquiring three-dimensional information; 3) calibrating a workpiece coordinate system; 4) thread segment segmentation; the special-shaped screw rod polishing machining method has the advantages that good feasibility is achieved, the special-shaped screw rod polishing machining method can meet the market requirements of small-batch production, automation, high precision and high efficiency of current special-shaped screw rod polishing machining, and the competitiveness of enterprises is effectively improved in the aspects of production flexibility, machining efficiency, environmental protection and economic benefits.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a visual servo feeding special-shaped spiral curved surface screw abrasive belt polishing device and method. Background technique [0002] Special-shaped helical surface screw (hereinafter referred to as special-shaped screw) is one of the core parts of complex mechanical equipment such as injection molding machines, compressors, and screw pumps. Compared with ordinary screws, the most important feature of special-shaped screws is its complex geometric structure, which often contains multiple thread segments with different root diameters, leads, and helix angles. The market demand for special-shaped screws has the characteristics of high precision and small batches: special-shaped screws are often used in the core power components of key mechanical equipment, and require high surface accuracy; different mechanical equipment requires different types of special-shaped...

AI Technical Summary

Problems solved by technology

However, the existing methods can only realize the automation of the polishing process. In the early stage, it is still necessary to manually measure the geometry of the workpiece surface to determine the thread specification, plan the polishing path, and compile the NC program.

The direct measurement of the spiral surface by the technician will introduce a large measurement geometric error, which is difficult to adapt to the special shaped screw with variable lead and variable thread lead angle, which will affect the polishing path and CNC machining accuracy

The measurement, path planning and NC programming of different types of special-shaped screws not only consume a lot of time, but also put forward high requirements for the experience and technology of technicians, seriously affecting production efficiency and economic benefits

Therefore, the current CNC abrasive belt polishing method has the disadvantages of poor production flexibility, low processing accuracy, and low production efficiency.

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