Uniform loading guide rail unloading device for large and heavy numerically-controlled machine tool

Abstract

The invention discloses a uniform loading guide rail unloading device for a large and heavy numerically-controlled machine tool. The device comprises a lathe bed, a ball screw, a moving part, four oil cylinders and four unloading rolling guide rail blocks; the lathe bed comprises a bed base and two sliding guide rails, the sliding guide rails are parallel to each other and are arranged on the upper portion of the bed base, the ball screw is installed on the bed base, the moving part is arranged on the upper portion of the lathe bed and is connected with a ball screw nut, the oil cylinders are arranged on the sliding guide rails in the mode of combination of two, each unloading rolling guide rail block is arranged between the corresponding oil cylinder and the corresponding sliding guide rail, and the two ends of the moving part are connected with the sliding guide rails respectively. According to the uniform loading guide rail unloading device for the large and heavy numerically-controlled machine tool, the proportion of a sliding and a rolling load can be adjusted according to the oil pressure of the oil cylinders, and the oil cylinders are same in oil pressure and uniform in stress; the uniform loading guide rail unloading device is particularly suitable for the situations that a larger load exists, and stress is uniform, and wide adaptability and machining precision consistency are achieved.

Description

technical field [0001] The invention relates to the technical field of metal cutting machine tools, in particular to an unloading device for evenly loaded guide rails of large and heavy numerically controlled machine tools. Background technique [0002] There are three types of guide rails for CNC machine tools: rolling guide rails, sliding guide rails, and static pressure guide rails. Rolling guides are divided into two structural forms: ball and roller. Ball-type rolling guides are generally used for light-load or medium-load high-speed moving equipment; fast response is good, but the bearing capacity is poor; roller-type rolling guides are generally used for heavy-duty Load or medium-load high-speed moving equipment; fast response is good, the bearing capacity of the roller type rolling guide of the same specification is about 3 times larger than that of the ball type rolling guide, but the fast moving speed of the ball type rolling guide is relatively low, and the fast r...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an unloading device for large and heavy-duty numerical control machine tool uniform load guide rails. By adjusting the ratio of sliding load and rolling load, it can overcome the difficulty in adjusting the uniform load of products in the prior art and the insufficient bearing capacity of each unloading rolling guide block. Average technical issues

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