A quasi-five-axis machining center and its machining method

Abstract

The invention discloses a quasi-five-axis machining centre and a machining method thereof. The quasi-five-axis machining centre comprises an AC rotary table structure, wherein the AC rotary table structure comprises a C-axis rotary table, the C-axis rotary table comprises a bridge frame plate with one end which is supported and connected to a first support table, and the other end which is supported and connected to a second support table, and a crossing shaft ring capable of freely rotating around a C-axis is further assembled on the bridge frame plate; a rotary plate is arranged by being parallel to the axis direction of an A-axis, and supported and connected to the rotary end surface of the crossing shaft ring, a shaft sleeve is further arranged on the rotary plate, and a rotary bearing capable of freely rotating around the C-axis is arranged in the shaft sleeve; a machining main shaft is detachably connected with a drive pin, and when the rotary bearing moves to be below the drive pin, the drive pin is inserted in the middle hole of the rotary bearing. According to the quasi-five-axis machining centre and the machining method thereof disclosed by the invention, the rotary power source of the C-axis is from the machining main shaft of a common vertical machine, and the existing common vertical XYZ three-axis machine can be utilized, thus furthest reducing the machining cost of polyhedral components; moreover, the machining accuracy is high and the equipment structure is simple.

Description

technical field [0001] The invention relates to a quasi-five-axis machining center, in particular to a quasi-five-axis machining center and a machining method thereof. Background technique [0002] Five-axis machining (5 Axis Machining) is a mode of CNC machine tool processing. According to ISO regulations, when describing the movement of CNC machine tools, a right-handed rectangular coordinate system is used; the coordinate axis parallel to the main axis is defined as the z axis, and the rotation coordinates around the x, y, and z axes are A, B, and C, respectively. The movement of the coordinate axes can be realized by the worktable or the movement of the tool, but the direction is defined by the movement direction of the tool relative to the workpiece. Usually, the five-axis linkage refers to any of x, y, z, A, B, C Linear interpolation movement of 5 coordinates, in other words, five axes, refers to three moving axes of x, y, z plus any two rotation axes. Compared with ...

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Problems solved by technology

[0013] The above-mentioned BC turntable structure is equipped with two driving devices, the B-axis servo motor and the C-axis turntable motor, which occupy a relatively large space, and the structure is relatively complicated, and the machining accuracy cannot be guaranteed.

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