Numerical control gate boring-milling machine high-speed main spindle clamp tool resetting mechanism

Abstract

The present invention relates to a high-speed main shaft cutter holding rest mechanism of digital control plano-boring and milling machine. The invention mainly settles the force bearing condition of thrust bearing at tail part of principal axis for satisfying the requirement of high-speed recutting of numerical control machine tool. The invention is characterized in that the left end of oil cylinder (1) is fixed with a connecting sleeve (5). Oil cylinders (a, b, c) are provided among the connecting sleeve (5), the oil cylinder (1), a new piston rod (2) and a piston (3). The left end of new piston rod (2) is connected with a push rod (8) through an axial force rolling pair (6). A radial centering rolling pair (10) is installed between the rod diameter of push rod (8) and the new piston rod (2). An axial clearance X is provided between the left end face of push rod (8) and a main shaft sleeve (7). The mechanism can realize the separation of transmission device and the main shaft sleeve in working state and guarantee that the rolling pair is not affected by cutting force and cutter clamping force in operation thereby realizing the requirement of high-speed recutting of digital control plano-boring and milling machine.

Description

technical field [0001] The invention relates to a tool clamping mechanism for a spindle of a CNC gantry boring and milling machine, in particular to a reset mechanism for a high speed spindle of a CNC moving beam gantry boring and milling machine. Background technique [0002] CNC moving beam gantry boring and milling machine is mainly used for multi-station machining of large parts. It is mainly composed of a bed, a gantry, a sliding seat, a beam, a sliding crate, a spindle box, and a square ram. The bed is fixed on the foundation, the left and right sliding seats are placed on the bed, the left and right columns are respectively fixed on the sliding seats, and the left and right columns are connected together on the top surface of the columns through the connecting beam to form a closed gantry frame. The gantry moves longitudinally along the guide rail of the bed, the sliding crate moves laterally along the beam guide rail, the beam moves vertically along the vertical gui...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the main shaft rotates and is always in the state of clamping the tool when the machine tool is working, resulting in a large force on the thrust bearing at the end of the main shaft. In the rotating state, the loosening device and the spindle sleeve are separated to ensure that the thrust bearing does not bear the influence of cutting force and clamping force when the spindle rotates, so as to realize the high-speed re-cutting requirements of the CNC gantry boring and milling machine

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