EP-4094883-B1 - BLADE DISK MACHINING CENTER

EP4094883B1EP 4094883 B1EP4094883 B1EP 4094883B1EP-4094883-B1

Inventors

CHEN, HU
GUO, Hongzhen
GAO, Lujun
LIU, PEI
WANG, Lianyang
SUN, HONGWEI
WEI, ZHIHONG
LI, Shaozhi
Tang, Hongtao
LIN, Meng
Song, Mingshan

Dates

Publication Date: 20260506
Application Date: 20200922

Claims (4)

A blisk machining center, comprising: an A-axis rotary assembly, a B-axis rotary assembly and a C-axis rotary assembly, wherein the A-axis rotary assembly drives the blisk (8) to rotate, the B-axis rotary assembly drives an attachment head (6) to rotate, and the attachment head (6) drives a tool (7) to machine the blisk (8), and the C-axis rotary assembly drives the A-axis rotary assembly to rotate, characterized in that the intersection of a rotation axis of the B-axis rotary assembly and a rotation axis of the C-axis rotary assembly is the center of the machining area of the blisk (8), and a tip point of the tool (7) is on the rotation axis of the B-axis rotary assembly.
The machining center according to claim 1, wherein the A-axis rotary assembly is an A-axis turntable (10) driving the blisk (8) to rotate, the B-axis rotary assembly includes an attachment head (6) on which the tool (7) is fixed and a B-axis turntable (5), and the B-axis turntable (5) drives the attachment head (6) to rotate, the C-axis rotary assembly is a C-axis turntable (9), the A-axis turntable (10) and the C-axis turntable (9) are detachably connected, the rotation axis of the C-axis turntable (9) is perpendicular to the horizontal plane, and is perpendicular to the rotation axis of the blisk (8).
The machining center according to claim 2, wherein the A-axis turntable (10) is fixed to the top surface of the C-axis turntable (9), and a central axis of the A-axis turntable (10) is the rotation axis of the blisk (8).
The machining center according to claim 3, further comprising a tool magazine (2) for changing the tool (7), wherein the tool magazine (2) is on the same side as the attachment head (6).

Description

TECHNICAL FIELD The present invention relates to the field of machine tool machining, in particular to a blisk machining center. BACKGROUND ART The use of blisks in aero-engines is a development trend of aero-engine technology in the world. In order to expand the application of blisks in aero-engines, difficulties in manufacturing the blisks must first be solved. At present, our aero engines are less likely to use blisks, and the main reason why they are not widely available is that the technical difficulties of manufacturing the blisks are still not solved. The difficulties in manufacturing aero-engine blisks lie in the complex profile of the blade, high machining accuracy and surface quality requirements, extremely high blade machining consistency, blade machining deformation and the materials used. The surface of the blisk blade is mostly free-form, which puts additional extremely high requirements on the machining accuracy and surface roughness of the blade. It is easier to achieve such machining accuracy when the surface to be machined is plane or cylindrical, but it is more difficult to achieve such machining requirements on a free-form surface. The tool movement space is limited during machining, which makes it more difficult to achieve high machining accuracy for the blade. Therefore, the machining of aero-engine blisks is a problem all over the world. Existing machine tools have extremely high requirements on the motion speed and acceleration range of each physical axis when performing the machining with the 5-axis rotary tool. CN107263254 A, which forms the basis for the preamble of claim 1, discloses an automatic grinding machine for full profiles of vanes and vane channels of a blisk of an aero-engine. The automatic grinding machine for the full profiles of the vanes and the vane channels of the blisk of the aero-engine comprises a machine body. The machine body is provided with multiple blade machining positions. Each machining position is provided with a grinding head assembly, wherein the grinding head assemblies have different functions. A rotation support which conveys the blisk to be machined to the corresponding machining position is arranged on one side of the machine body. Each grinding head assembly comprises a stand column mechanism and a grinding head. Each stand column mechanism is installed on the blade machining position of the machine body in the Y-axis direction of three-dimensional coordinates in a sliding manner. Each grinding head is detachably installed on the corresponding stand column mechanism in the Z-axis direction of the three-dimensional coordinates in a sliding manner. The automatic grinding machine for the full profiles of the vanes and the vane channels of the blisk of the aero-engine aims to solve the problems that in the prior art, by the adoption of manual grinding of the vanes of the blisk, labor intensity is high, efficiency is low, the surface consistency of the vanes is poor, and the quality is not high. CN103143789 A discloses a gear cutting machine, which comprises a machine body, a pillar, a toolbox, a sliding table, a rotary table and a swing mechanism, wherein the pillar is movably arranged on the machine body along a first horizontal direction; the sliding table is movably arranged on the machine body along a second horizontal direction; the toolbox is movably arranged on the pillar along the vertical direction; the rotary table is rotatablely arranged on the sliding table; the rotary table is driven by the swing mechanism to rotate; and a driving device of the swing mechanism is arranged on the sliding table. The gear cutting machine is simple in structure, stable and reliable in performance, high in efficiency, small in occupied area and easy in protection and chip removal. Moreover, workpieces and tools can be conveniently assembled and disassembled. CN1150078 A discloses a numerically controlled grinding machine for grinding preferably metallic workpieces, in particular, tools. It is suitable for grinding metal parts, in particular a CNC grinding machine tools. It comprises a fixed link to a rigid, distortion-free gantry of the bed, the gantry with two side stations and the bed in a horizontally extending distance and on which is mounted a grinding spindle holde, and along a first axis bridge can be adjusted. Bed is designed to protrude from the side of the gantry. SUMMARY OF INVENTION The present invention provides a blisk machining center to overcome the above technical difficulties. The present invention provides a blisk machining center, including: A-axis rotary assembly, B-axis rotary assembly and C-axis rotary assembly, wherein the A-axis rotary assembly drives a blisk to rotate,the B-axis rotary assembly drives an attachment head to rotate, and the attachment head drives a tool to machine the blisk,the C-axis rotary assembly drives the A-axis rotary assembly to rotate,the intersection of a rotation axis of the B-axis rotary assembly and a ro