Inner bore abrasive belt grinding machine tool and grinding method

Abstract

The invention discloses an inner bore abrasive belt grinding machine tool and a grinding method. The inner bore abrasive belt grinding machine tool comprises a bed; a workpiece clamping rotating mechanism is arranged on the bed; both ends of the bed are connected with pulley yokes; both the pulley yokes are vertically provided with two pulleys; a steel rope is supported by the four pulleys together; the center line of the top edge of the steel rope and the center line of the workpiece clamping rotating mechanism are on the same straight line; the top edge of the steel rope is also connected with a grinding head; the center line of the grinding head and the center line of the top edge of the steel rope are on the same straight line; a workpiece supporting mechanism is arranged below the top edge of the steel rope; the workpiece supporting mechanism is arranged on the bed; a grinding head drawing mechanism is also arranged in the bed; and the grinding head drawing mechanism is connected with the steel rope. According to the invention, an abrasive belt can be adopted to grind an inner bore of a slender pipe; workpieces with various thicknesses can be processed; and not only is processing accuracy improved, but also the inner bore abrasive belt grinding machine tool has the characteristics of improvement on efficiency, flexibility for use, simple structure and the like.

Description

technical field [0001] The invention relates to a grinding machine, in particular to an abrasive belt grinding method for the inner hole of a slender tube. Background technique [0002] At present, slender round tubes are widely used in chemical, pharmaceutical, food and other industries. However, in many industries, there are high requirements for the roughness of the inner hole of the slender tube. If the roughness of the inner hole of the slender tube is too high, residues will easily accumulate in the inner hole, which will affect the normal use of the pipe fitting. Therefore, it is necessary to polish the inner hole of the slender tube, and polishing the inner wall of the slender tube has always been a difficult problem. [0003] At present, for the polishing of slender round tubes, the main technological methods used are: grinding polishing, electrolytic polishing, centrifugal polishing, magnetic polishing, and grinding wheel grinding. Among them, centrifugal polishi...

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Problems solved by technology

Among them, centrifugal polishing and magnetic polishing can only achieve micro-cutting, so the efficiency is relatively low, and they are not suitable for polishing of large-volume, large-volume slender round tubes; while electrolytic polishing requires the roughness of the inner wall of the polished tube to be R0. It is about 5um, so it is still necessary to perform a polishing process to remove scale and reduce the surface roughness value before electrolytic polishing; at the same time, due to the large centrifugal force generated by the grinding wheel during the grinding process, it will cause a large amount of vibration of the mandrel Vibration even hits the pipe fittings, which cannot guarantee the roundness requirements of the inner hole. Although a flexible metal soft shaft is proposed to process this problem, the maximum feed distance is only 2.5m, and the workpiece must be turned around to meet the long The polishing of the pipe fittings, so the flexibility is poor

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