Self-adaptation gravity center compensation device and method for floor type boring-milling machine

Abstract

The invention discloses a self-adaptation gravity center compensation device and method for a floor type boring-milling machine. The relevant technical requirement for the boring machine in the hole boring process can be met through the self-adaptation gravity center compensation device and method, and the unfailing property of the machine is improved. The self-adaptation gravity center compensation device comprises a boring head box. A transverse ram is arranged on the boring head box. An upright column supporting the boring head box is arranged under the boring head box. A boring bar parallel to the ram is arranged at the end, far away from the boring head box, of the ram. The two longitudinal sides of the boring head box are each provided with a pair of linear guide rails. A fixing support is arranged in the boring head box. A servo motor is arranged on the upright column. The problem that the gravity center deviation of the parts of the boring head box, the ram and the boring bar is caused due to the continuous change of the working dimensions is solved through automatic adjustment of the self-adaptation gravity center compensation device and method.

Description

technical field [0001] The invention relates to a numerically controlled floor boring and milling machine, in particular to a device and method for self-adaptive center of gravity compensation of the boring head box-ram-boring bar components of the floor boring and milling machine. Background technique [0002] The boring head part of the CNC floor boring and milling machine has a lot of precision that needs to be continuously compensated during the work process, and its compensation technology is quite difficult. In the design of existing machine tool technology, the following compensation methods are mainly used: [0003] 1. Boring bar overhang compensation; [0004] 2. Ram deflection compensation; [0005] 3. Center of gravity compensation for boring head box - ram - boring bar components. [0006] The combination of the above is combined and applied comprehensively to meet the performance of the machine tool and achieve the machining accuracy in the machining process ...

AI Technical Summary

Problems solved by technology

The third item of center of gravity compensation technology is more difficult. The difficulty lies in that when the ram and the boring shaft extend forward, the center of gravity will move forward together, generating an additional moment on the front guide rail (assuming the front guide rail is the main guide rail), and this The additional moment will change continuously with the extension distance of the ram and the boring shaft, so the reaction force on the main guide rail will change continuously with the variable to balance the moment

Since the strokes of the Z and W axes of floor boring are generally more than 1 meter, the slight deformation of the guide rail will be amplified according to the length of the force, resulting in an uncontrollable sag of the ram and the boring shaft

When large and heavy tools are used in machine tool processing, it will further cause the ram and boring shaft to sag, resulting in the non-parallelity of the cutter tooth plane and the Y axis, causing abnormal product quality, such as serious tool marks, rough machining holes, etc. The axis of the hole is skewed, etc.

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