Double compensation method and device for moving tilt of numerical control floor type boring-milling machine ram

Abstract

Provided is a double compensation method and a device for moving tilt of a numerical control floor type boring-milling machine ram. The method includes that 1) a spindle box is provided with a spindle box tilt compensation mechanism and the ram is provided with a ram droop compensation mechanism, 2) ram droop quantity and spindle box tilt degree of all compensation points of the horizontal direct, namely a Z axis of the ram is measured through measurement tools, and measured data is input in a programmable logic controller, 3) coordinate value of the ram on the Z axis is detected by a detection element during operation of a machine tool, 4) corresponding ram droop quantity and spindle box tilt degree are looked up in the programmable logic controller according to the detected coordinate value, and 5) each coordinate value is calculated according to the ram droop quantity and the spindle box tilt degree and converted to compensation voltage, then compensation voltage signals are output to an electro-hydraulic proportional valve after being amplified by an amplifier, and the electro-hydraulic proportional valve controls a deformation compensation mechanism arranged on the ram and an inclination compensation mechanism of the spindle box.

Description

technical field [0001] The invention relates to a numerically controlled machine tool, in particular to a double compensation method and device for moving and tilting a ram of a numerically controlled floor boring and milling machine. Background technique [0002] With the continuous development of modern manufacturing industry, the importance of precision and ultra-precision machining technology has become increasingly prominent. As an important equipment in the manufacturing industry, CNC machine tools are also facing opportunities and challenges in the new era. Improving the precision of CNC machine tools is the key to improving the quality of CNC machine tools and enhancing market competitiveness. [0003] The most important structural feature of floor boring and milling machine is the use of cantilevered ram working parts. The ram is in an overhang state when it is working, and the greater the working stroke, the greater the maximum overhang. Due to the weight of the...

AI Technical Summary

Problems solved by technology

[0009] The disadvantage of the first three compensation methods is that the compensation is mainly through the deformation of the spindle box or ram due to external force, which often results in the situation that the deformation of the spindle box is too large but the ram is not compensated, and the compensation amount cannot be accurate control, low compensation accuracy

Compared with the first three methods, the fourth method has the characteristics of wide compensation range and high precision, but the oil pressure control method of the variable pressure hydraulic chamber is more cumbersome and difficult to implement

[0013] Among the above-mentioned prior art, the hydraulic compensation device provided by Patent No. CN200810187286 is relatively complicated, and the oil pressure control method of the variable pressure hydraulic chamber is relatively complicated and difficult to implement; Patent No. The relationship between pressure and stick out

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