Boring bar rotating assembly of horizontal piercing boring mill

Abstract

The invention discloses a boring bar rotating assembly of horizontal piercing boring mill, which includes a boring bar, a bearing sleeve, a bearing body, and a bearing arranged between the bearing sleeve, and the bearing body; the middle of the bearing body is provided with two conical parts with conical degrees; the conical parts are sleeved with a cylindrical roller bearing the inner ring of which is provided with conical degree; the outside of the cylindrical roller bearing is provide with double round nuts; and the two ends of the bearing body are respectively sleeved with thrust ball bearings. As the technical scheme is adopted, the original two deep groove bearings are replaced by the double-line cylindrical roller bearings the inner rings of which are provided with conical degrees, and the thrust ball bearings are additionally arranged, which respectively control the radical and axial play under the condition of guaranteeing the rotating load, so as to stabilize the processing quality of products.

Description

technical field [0001] The invention relates to a boring bar rotating assembly of a horizontal center-through boring machine. Background technique [0002] At present, the boring bar rotation assembly of the horizontal center-through boring machine adopts two deep groove ball bearings assembled on the outer diameter of the bearing sleeve, and the distance between the bearings is arranged with the spacer ring as the filler, and then tightened with round nuts, the bearing sleeve hole Sliding bearings matching the outer diameter of the boring bar are installed at both inner ends, and the middle section is equipped with a boring bar as the power source to drive the bearing sleeve to rotate. The bearing rotation accuracy has an inseparable relationship with the quality of the processed workpiece. [0003] The axial and radial clearances of deep groove ball bearings are relatively large, and the boring bar is prone to vibration during cutting rotation, which affects the accuracy o...

AI Technical Summary

Problems solved by technology

[0003] The axial and radial clearances of deep groove ball bearings are relatively large, and the boring bar is prone to vibration during cutting rotation, which affects the accuracy of the workpiece

The friction generated by the stroke movement of the boring bar will cause the entire device of the bearing sleeve to move axially due to the large axial clearance of the bearing, which will easily cause the tool to stab, climb and jump, and affect the quality of the processed surface

There is no dust-proof device at the joint between the boring bar and the sliding bearing, which intensifies the wear of the waste dust and affects the machining accuracy

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