Gantry type perforating machine tool

Abstract

The invention provides a gantry type perforating machine tool. The gantry type perforating machine tool comprises a gantry frame, a perforating operation unit, a central working table, two bases, two sets of fourth guide rails and two sets of fourth slide blocks, wherein the gantry frame has a gantry vertical column and a gantry cross beam; the gantry cross beam is provided with a through hole in a Z direction; the central working table is arranged below the gantry cross beam; the two sets of fourth guide rails are arranged on the bases in an X direction; and the two sets of fourth slide blocks are arranged on the lower surface of the gantry vertical column in the X direction, and are in sliding connection with the two sets of fourth guide rails to enable the gantry frame to move in the X direction. The perforating operation unit comprises a tool bar, a first ram, a second ram, a cutter yaw, a first guide rail, a second guide rail, a second slide block, a third guide rail and a third slide block. The movement of the tool bar in the Z direction is realized through the sliding of the tool bar in an inner cavity of the second ram; the movement of the tool bar in the X direction is realized through the sliding of the second ram on the first ram; the movement of the tool bar in a Y direction is realized through the sliding of the first ram on the gantry cross beam; and the multi-degree of freedom perforating operation for workpieces is realized by the micro-movement of the perforating operation unit.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a gantry type hole making machine tool. Background technique [0002] At present, in the field of manufacturing, more and more gantry machine tools are used for large-scale hole-making. Gantry machine tools are generally divided into two types: fixed gantry (table movement) and dynamic gantry (gantry frame movement) in terms of overall layout. However, when the workpiece itself is heavy and the volume is large, the moving gantry structure is better than the fixed gantry structure, because the moving gantry structure can not only ensure the convenience of workpiece clamping, but also process according to the actual effective length of the workbench. The workpiece, and there is no limit to the quality of the workpiece. However, the hole making operation is different from the conventional milling process, which requires the operation terminal to be started, stopped and posi...

AI Technical Summary

Problems solved by technology

However, the hole making operation is different from the conventional milling process, which requires the operation terminal to be started, stopped and positioned frequently, and the moving parts of the machine tool are in the process of frequent and violent acceleration and deceleration. If the gantry frame is directly involved in this violent acceleration and deceleration movement, it will be The large mass of the gantry frame produces a very large inertial force, which adversely affects the machine tool components, while reducing the processing efficiency and shortening the life of the machine tool

In addition, the hole making operation has high requirements for the depth accuracy of the countersink, which not only has high precision requirements for the movement of the tool along the normal direction of the workpiece surface, but also has high precision requirements for the position of the tool relative to the workpiece surface. During the operation, there is a large error between the actual contour of the workpiece surface and the desired contour given by the digital model. In this case, if the conventional multi-coordinate linkage method is simply adopted, the tool is driven along the normal direction of the workpiece surface according to the machine tool coordinates feed, it will be difficult to guarantee the normal accuracy requirements

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