High-precision internal-cooling ball screw internal-cooling deep hole machining numerical control special machine tool

Abstract

The invention discloses a high-precision internal-cooling ball screw internal-cooling deep hole machining numerical control special machine tool. The high-precision internal-cooling ball screw internal-cooling deep hole machining numerical control special machine tool comprises a machine tool body, a fixing base is arranged in the middle of the machine tool body, a pair of first linear sliding rails and a pair of second linear sliding rails are arranged on the portions, on the two sides of the fixing base, of the machine tool body correspondingly, a tool assembly is slidably connected to the first linear sliding rails, the second linear sliding rail is connected to a workpiece supporting assembly in a sliding mode, the workpiece supporting assembly is mainly composed of a penetrating type power sliding table and a penetrating type end part clamping sliding table, main spindle sleeves on the two sliding tables can clamp and support a workpiece and drive the workpiece to rotate, the tool assembly drives a drilling tool to achieve feeding, and therefore, deep hole machining is carried out on the workpiece.

Description

technical field [0001] The invention relates to a special-purpose machine tool, in particular to a high-precision internal-cooling ball screw internal-cooling deep-hole machining special-purpose CNC machine tool. Background technique [0002] With the continuous development of high-precision machine tools, the requirements for the travel speed and positioning accuracy of the tool in the machine tool are getting higher and higher. Most of the drive mechanisms that drive the tool movement in traditional automated machine tools are ball screw mechanisms, and the rotation of the screw is converted For the linear motion of the nut block connected to it, the displacement of the tool in three-dimensional space is realized through the combination of linear motions in multiple directions. When the lead screw moves relative to the nut block, under the action of friction, the temperature will inevitably rise. Then, under the principle of thermal expansion and cold contraction, the leng...

AI Technical Summary

Problems solved by technology

However, on the one hand, the traditional gun drilling machine can only process deep holes with a length of less than 2.5m. The coaxiality requirement between the tool and the axis to be processed is particularly high, even if there is a small angle error between the two, this error will be magnified many times at the other end of the axis to be processed

It is precisely because of the above reasons that the traditional deep hole processing special machine tool can only be used for the length of no more than 2.5m. Once the above value is exceeded, it is impossible to process a long hole with a coaxiality that meets the requirements; and the inner cooling ball screw The length can be up to 8m, and the deep hole processing of this length cannot be realized with the traditional gun drilling machine;

[0005] At the same time, the drive mechanism used by the traditional gun drill to drive the rotation of the shaft workpiece is set at one end of the workpiece (or machine tool). This structural form even if the auxiliary support is added in the middle of the workpiece, because the distance between the driving end and the drilling point of the tool is relatively small. In the working process, the shaft workpiece will also have a large runout, which will affect the machining accuracy;

[0006] It is precisely because of the above reasons that it is very difficult to process the inner hole of the ultra-long ball screw with internal cooling function by using the traditional special machine tool for deep hole processing

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