CN-117718548-B - Impeller multi-tool rough and fine integrated pulse dynamic electrolytic machining machine tool

CN117718548BCN 117718548 BCN117718548 BCN 117718548BCN-117718548-B

Abstract

The invention discloses a blade disc multi-tool rough and fine integrated pulse dynamic electrolytic machining machine tool, which relates to the technical field of electrolytic machining and comprises a machine tool body, wherein the machine tool body comprises a base, a left upright post, a right upright post and a middle upright post, a workpiece moving platform is arranged on the middle upright post, the workpiece moving platform comprises a workpiece vertical moving platform, the workpiece vertical moving platform is connected with a workpiece rotary workbench, the rotating end of the workpiece rotary workbench is used for fixing a blade disc workpiece, an upper tool beam and a lower tool beam are arranged between the left upright post and the right upright post, the lower tool beam is connected with a tool vertical moving platform, the upper tool beam is connected with an upper tool disc through an upper rotary vibration device, the lower tool beam is connected with a lower tool disc through a lower rotary vibration device, a plurality of blade back electrodes and a plurality of tube electrodes are uniformly distributed on the circumference of the lower surface of the upper tool disc, and a plurality of blade disc electrodes are uniformly distributed on the circumference of the upper surface of the upper tool disc. The invention simplifies the processing flow of the blisk and has high processing precision and working efficiency.

Inventors

DUAN SHUANGLU
LIU JIA
ZHU DI
TANG BO
Zhan Xiandai

Assignees

南京航空航天大学

Dates

Publication Date: 20260508
Application Date: 20231220

Claims (7)

1. The blade disc multi-tool rough and fine integrated pulse dynamic electrolytic machining machine tool is characterized by comprising a machine tool body, wherein the machine tool body comprises a base, a left upright post, a right upright post and a middle upright post, the left upright post, the right upright post and the middle upright post are all fixed at the upper end of the base, and the left upright post and the right upright post are respectively positioned at the left side and the right side of the middle upright post; the middle upright post is provided with a workpiece moving platform, the workpiece moving platform comprises a workpiece vertical moving platform, the moving end of the workpiece vertical moving platform is connected with a workpiece rotary workbench, and the rotating end of the workpiece rotary workbench is used for fixing a leaf disc workpiece; An upper tool beam and a lower tool beam are arranged between the left upright post and the right upright post, the lower tool beam is connected with a tool vertical motion platform, the tool vertical motion platform can drive the lower tool beam to move up and down, the upper tool beam is connected with an upper tool disc through an upper rotary vibration device, the lower tool beam is connected with a lower tool disc through a lower rotary vibration device, a plurality of leaf back electrodes and a plurality of tube electrodes are uniformly distributed on the circumference of the lower surface of the upper tool disc, a plurality of leaf basin electrodes are uniformly distributed on the circumference of the upper surface of the upper tool disc, and the workpiece rotary workbench can pass through the upper tool disc; the workpiece rotary workbench is a rotary motor; The lower end of the upper tool beam is provided with an upper fixed rotary table, the upper rotary vibration device comprises an upper rotary table bearing, an upper transverse movement driving motor, an upper transverse movement driving screw rod, an upper transverse movement driving sliding block and an upper vibrator, the upper rotary table bearing is sleeved on the outer side of the upper fixed rotary table, the upper transverse movement driving motor is arranged on the upper tool beam, an output shaft of the upper transverse movement driving motor is connected with the upper transverse movement driving screw rod, the upper transverse movement driving screw rod is connected with the upper transverse movement driving sliding block in a threaded manner, the upper transverse movement driving sliding block is fixedly provided with the upper vibrator, a vibration main shaft is fixedly arranged on the upper vibrator, and the vibration main shaft of the upper vibrator is hinged with the upper tool disc through a connecting rod mechanism; The upper end of the lower tool beam is provided with a lower fixed rotary table, the lower rotary vibration device comprises a lower rotary table bearing, a lower transverse movement driving motor, a lower transverse movement driving screw rod, a lower transverse movement driving sliding block and a lower vibrator, the lower rotary table bearing is sleeved on the outer side of the lower fixed rotary table, the lower transverse movement driving motor is mounted on the lower tool beam, an output shaft of the lower transverse movement driving motor is connected with the lower transverse movement driving screw rod, the lower transverse movement driving screw rod is connected with the lower transverse movement driving sliding block in a threaded manner, the lower transverse movement driving sliding block is fixedly provided with the lower vibrator, a vibration main shaft is fixedly arranged on the lower vibrator, and the vibration main shaft of the lower vibrator is hinged with the lower tool disc through a connecting rod mechanism.
2. The blade disc multi-tool rough and fine integrated pulse dynamic electrolytic machining machine tool according to claim 1, wherein the workpiece vertical movement platform comprises a workpiece vertical movement base, the workpiece vertical movement base is fixed on the middle upright post, a workpiece vertical driving motor is fixed at the upper end of the workpiece vertical movement base, an output shaft of the workpiece vertical driving motor is connected with a workpiece vertical driving screw rod, a workpiece vertical driving sliding block is connected onto the workpiece vertical driving screw rod in a threaded mode, and the workpiece vertical driving sliding block is in sliding connection with the workpiece vertical movement base.
3. The blade disc multi-tool rough and fine integrated pulse dynamic electrolytic machining machine tool according to claim 1 is characterized in that two tool vertical movement platforms are arranged, the two tool vertical movement platforms are fixed on opposite sides of the left upright post and the right upright post, and the two tool vertical movement platforms are respectively connected to two sides of the lower tool cross beam; The tool vertical movement platform comprises a tool vertical movement base, a tool vertical driving motor is fixed on the tool vertical movement base, an output shaft of the tool vertical driving motor is connected with a tool vertical driving screw rod, a tool vertical driving sliding block is connected to the tool vertical driving screw rod in a threaded mode, and the tool vertical driving sliding block is connected with the tool vertical movement base in a sliding mode.
4. The blade disc multi-tool rough and fine integrated pulse dynamic electrolytic machining machine tool according to claim 1 is characterized in that the upper tool beam is of an inverted-U-shaped structure, and the lower tool beam is of a U-shaped structure.
5. The impeller multi-tool rough and fine integrated pulse dynamic electrolytic machining tool according to claim 1, wherein the pipe electrode is fixed at the lower end of the upper tool plate through an extension rod, and the pipe electrode is positioned below the blade back electrode.
6. The blade disc multi-tool rough and fine integrated pulse dynamic electrolytic machining tool according to claim 1, wherein a plurality of cutter relieving grooves are uniformly formed in the circumferential direction of the lower tool disc, and the pipe electrode can penetrate through the cutter relieving grooves.
7. The blade disc multi-tool rough and fine integrated pulse dynamic electrolytic machining machine tool according to claim 1, wherein an upper connecting and fixing lug is arranged on the upper tool disc and is used for being hinged with the upper rotary vibration device; The lower tool tray is provided with a lower connecting and fixing lug, and the lower connecting and fixing lug is used for being hinged with the lower rotary vibration device.

Description

Impeller multi-tool rough and fine integrated pulse dynamic electrolytic machining machine tool Technical Field The invention relates to the technical field of electrolytic machining, in particular to a blade disc multi-tool rough and fine integrated pulse dynamic electrolytic machining machine tool. Background With the continuous progress and development of the aviation industry, the performance of the novel aircraft is continuously improved, and the requirements on the aerospace engine are also higher and higher. In an aerospace engine, a blisk is the most critical and important component of the engine, the performance of which directly determines the performance of the engine. However, in the aerospace engine, the blisk has a complex structure, ultrathin blade profile, distortion, sharp front and rear edges and narrow blade grating channels, and is usually made of nickel-based superalloy, titanium alloy and other difficult-to-cut materials, so that new challenges are brought to the processing and manufacturing of the blisk. Electrolytic machining is based on the principle of electrochemical anodic dissolution of metals to remove material and to machine parts that meet the requirements. In the machining process, the tool cathode connected with the power supply cathode is not contacted with the workpiece connected with the power supply anode, and a certain machining gap is maintained. The electrolyte flowing at high speed flows between the tool cathode and the workpiece anode, and the workpiece anode metal is continuously dissolved under the action of electrochemical reaction. Therefore, the electrolytic machining is not limited by the hardness of the material, and the high-efficiency machining of materials such as titanium alloy, high-temperature alloy and the like with poor machining performance can be realized, and the method has outstanding principle advantages especially when the multi-tool machining of the blisk is realized. Currently, the electrolytic machining of blisks is mainly divided into two procedures, namely rough machining of blade grid channels and finish machining of blade profiles. In order to realize the processing methods, the scholars invented a plurality of multi-axis numerical control linkage electrolytic processing machine tools. A five-axis numerical control linkage processing machine tool capable of meeting the requirements of complex-profile part blade grid channel sleeve shape and radial feeding electrolytic rough processing of blisks, diffusers and the like is designed in a 'complex-profile numerical control efficient electrolytic processing machine tool' disclosed in a patent number CN 104259604B. In the three-shaft flexible feeding blade electrolytic machining method disclosed in the patent number CN100377820C, a three-head flexible feeding blade electrolytic machining machine tool is invented, and the blade profile and the flange plate structure can be machined simultaneously through the opposite movement of the tool cathode and the translation of the workpiece. In the patent number CN113523468B, a "blisk blade electrolytic machining machine tool with dual feed shafts capable of swinging angles" is mentioned a machine tool structure with a deflectable feed shaft, which can finish tangential feed precision trimming of front and rear edges after finishing the finish of the blade back profile of the blade. In the prior art, because the relative motion difference between the tool cathode and the workpiece in different working procedures is large, the electrolytic machining forming of the whole profile of the blisk blade needs to be completed on different machining equipment. In addition, the electrolytic machining machines mentioned in the above patents can only implement single electrode machining, i.e., machining single channels or blades one by one using a single electrode, for example, a blisk having 90 blades needs to be repeatedly machined 90 times, which severely reduces the machining efficiency of the blisk. In recent years, new engines are being developed and are facing batch production, and annual production tasks of various blisks are gradually increased, so that further improvement of processing efficiency and reduction of processing cost are urgently needed. However, the multi-tool electrolytic machining of the blisk is an effective method for doubly improving the machining efficiency of the blisk, but the synchronous machining of the multi-tool is difficult to realize by the existing equipment. Therefore, development of a novel electrolytic machining machine tool is needed to meet the precise and efficient electrolytic machining requirements of blisk blade grid channels and blades. Disclosure of Invention The invention aims to provide a blade disc multi-tool rough and fine integrated pulse dynamic electrolytic machining machine tool which is used for solving the technical problems in the prior art and meeting the motion requirements of two procedures of rough mach