CN-122016790-A - Online detection method and detection device for discharge cutting

Abstract

The invention relates to the field of online detection of discharge cutting, in particular to an online detection method and device for discharge cutting. The device comprises an electric discharge machine tool and an experimental detection platform, wherein the method comprises the steps of machining a machined workpiece on the electric discharge machine tool in a fixed-distance and segmented machining mode, integrally moving a clamping mechanism for clamping the machined workpiece to the experimental detection platform after the machining section is completed, detecting and recording the current machining section on the machined workpiece through the experimental detection platform, carrying out fixed-distance machining on the next segment again by taking the current machining section as a starting point, detecting and recording the machined workpiece of the current fixed-distance machining section until the machining section is completed. According to the invention, the workpiece can be effectively detected in the machining process by a cutting machining mode of a plurality of sections at fixed intervals, and the workpiece is freely switched between machining equipment and detection along with the clamp, so that the detection efficiency is improved, and the technical defect that the surface defect information of the workpiece cannot be acquired in blind machining is avoided.

Inventors

• QIU MINGBO
• YANG JIZHAO
• HUANG WANG
• TAN ZHENGDAO
• DI YIFAN
• LIU ZHAOWEI

Assignees

• 南京航空航天大学

Dates

Publication Date

20260512

Application Date

20260226

Claims (6)

1. 1. The online detection method for the electric discharge cutting is characterized by comprising the following specific steps of: s1, loading a clamping mechanism on which a machined workpiece is mounted on a discharge cutting machine tool for machining; s2, machining a machined workpiece by adopting a fixed-distance sectional machining mode; S3, after the current processing section is completed, integrally moving and mounting a clamping mechanism for clamping the processed workpiece to an experimental detection platform; S4, detecting and recording the current processing section on the processing workpiece through the light supplementing device and the high-definition shooting device of the experimental detection platform; S5, after the step S4 is completed, the whole clamping mechanism for clamping the machined workpiece is moved and installed on the electric cutting machine again, and the current processing section is used as a starting point for distance machining of the next section; S6, after the step S5 is completed, detecting and recording the processed workpiece of the current fixed-distance processing section; and S7, repeating the steps S3 to S6 until the processing of the workpiece is completed according to the processing stroke.
2. 2. The on-line detecting method for electric discharge machining according to claim 1, wherein the distance-divided segment machining mode is calibrated according to the machining length dimension of the machined workpiece, so that the machining length is divided into a plurality of segments with the same length in average, and each segment represents the machining times.
3. 3. The online detection device for the electric discharge cutting is characterized by comprising a clamping mechanism for clamping a workpiece and an experimental detection platform, wherein a second fixed chuck for loading the clamping mechanism is arranged on the upper end face of the experimental detection platform, a guide rail is arranged on one side of the second fixed chuck, a sliding block is arranged on the guide rail, a fixing plate is horizontally arranged on the sliding block, and a supporting rod for supporting a high-definition shooting device is vertically arranged on the fixing plate.
4. 4. The on-line detection device for electric discharge cutting according to claim 3, wherein the upper end face of the experimental detection platform is further provided with a light supplementing device, and the substrate of the experimental detection platform is a marble platform.
5. 5. The on-line detecting device for electric discharge cutting according to claim 3, wherein the clamping mechanism comprises a clamp upper pressing plate for clamping the workpiece and a clamp supporting plate; the aluminum profile support structure is used for supporting and fixing the plurality of aluminum profiles of the upper pressing plate and the lower pressing plate, the plurality of aluminum profiles are mutually fixed through combination to form a stable aluminum profile support structure, and the aluminum profile support structure is mutually matched and fixed with the two fixing chucks through a zero point positioning chuck.
6. 6. The on-line measuring device for electric discharge machining according to claim 3 or 5, wherein the table of the electric discharge machine is provided with a first fixed chuck which is matched with the zero-point positioning chuck.

Description

Online detection method and detection device for discharge cutting Technical Field The invention relates to the field of online detection of discharge cutting, in particular to an online detection method and device for discharge cutting. Background The discharge cutting technique is widely used in various industrial fields due to its excellent ability to precisely process high-hardness, high-strength materials. The mechanism is that in insulating working liquid such as deionized water or kerosene, a continuously advancing wire electrode is used as a tool electrode, and a local material on the surface of a workpiece is melted and gasified through an instantaneous high-temperature plasma channel generated by controllable pulse discharge, so that trace removal and continuous cutting of the material are realized. However, with the material erosion, a large amount of material particles, vaporization products, and the like are continuously mixed into the working liquid, resulting in a rapid decrease in the transparency of the medium. The turbid liquid phase environment not only shields the visual observation path, but also strongly scatters or absorbs the optical signals, so that operators cannot directly observe the optical signals, and the defect information of the surface of the workpiece is difficult to obtain indirectly by means of conventional optical or image sensing means. The blind processing state forms a significant obstacle for monitoring discharge damage in real time and analyzing damage mechanism and optimizing process parameters. Disclosure of Invention The invention discloses an online detection method and device for discharge cutting to solve the technical problems. The invention adopts the following technical scheme: The invention relates to an online detection method for electric discharge cutting, which is based on an electric discharge cutting machine tool to cut a processed workpiece and then is detected by an experimental detection platform; The method comprises the following specific steps: s1, loading a clamping mechanism on which a machined workpiece is mounted on a discharge cutting machine tool for machining; s2, machining a machined workpiece by adopting a fixed-distance sectional machining mode; S3, after the current processing section is completed, integrally moving and mounting a clamping mechanism for clamping the processed workpiece to an experimental detection platform; S4, detecting and recording the current processing section on the processing workpiece through the light supplementing device and the high-definition shooting device of the experimental detection platform; S5, after the step S4 is completed, the whole clamping mechanism for clamping the machined workpiece is moved and installed on the electric cutting machine again, and the current processing section is used as a starting point for distance machining of the next section; S6, after the step S5 is completed, detecting and recording the processed workpiece of the current fixed-distance processing section; and S7, repeating the steps S3 to S6 until the processing of the workpiece is completed according to the processing stroke. The fixed-distance sectional machining mode is calibrated according to the machining length of the machined workpiece, so that the machining length is averagely divided into a plurality of sections with the same length, and each section represents the machining times. The invention relates to an online detection device for discharge cutting, which is matched with an electric cutting machine tool used for the online detection device for discharge cutting, wherein the electric cutting machine tool comprises a workbench, a lower arm, a stand column, an upper arm and an electrode wire, and a T-shaped groove is formed in the workbench; The detection device comprises a clamping mechanism for clamping a workpiece and an experiment detection platform, wherein a second fixed chuck for loading the clamping mechanism is arranged on the upper end face of the experiment detection platform, a guide rail is arranged on one side of the second fixed chuck, a sliding block is arranged on the guide rail, a fixing plate is horizontally arranged on the sliding block, and a supporting rod for supporting the high-definition shooting device is vertically arranged on the fixing plate. The invention relates to an on-line detection device for discharge cutting, wherein the upper end surface of an experimental detection platform is also provided with a light supplementing device, and the matrix of the experimental detection platform is a marble platform. The invention relates to an on-line detection device for discharge cutting, a clamping mechanism comprises an upper pressing plate and a lower pressing plate for clamping a workpiece, The aluminum profiles are used for supporting and fixing the upper pressing plate and the lower pressing plate, and are mutually fixed through combination to form a stable aluminum profile