An electrolytic machining device and process for the inner hole of an elbow

Abstract

The invention relates to the technical field of elbow inner hole processing, and discloses an electrolytic machining device and process for the inner hole of an elbow. After connecting the positive and negative poles of the DC power supply to the solid elbow blank, the electrolyte enters the solid elbow blank and the solid elbow blank. The solid elbow blank is connected to the electrode in the gap between the electrodes and an electrochemical corrosion reaction occurs. The solid elbow blank connected to the positive pole of the DC power supply is continuously dissolved as the anode. At the same time, the machine tool platform is continuously fed along the processing path. The electrolytic products are continuously washed away by the circulating electrolyte, so as to realize the processing of the inner hole of the elbow. The bending shape of the inner hole is controlled by the machining path of the machine tool platform. The depth of the bending hole processing of the head ensures that the inner hole can penetrate after the processing at both ends of the elbow, the yield is high, and the reliability is better. The area is opposite, and the processing efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of elbow inner hole processing, in particular to an electrolytic machining device and process for the inner hole of an elbow. Background technique [0002] Along with the development of natural science, cutting-edge technologies such as aviation and national defense have an increasing demand for curved pipes, and the requirements for the precision of the inner surface of the pipe are getting higher and higher. Elbow is used as the connecting part of the bending part of the pipeline, and the precision of its inner surface is very important. At present, high-pressure and ultra-high-pressure swivel elbows are mainly processed by traditional methods such as forging, casting, straight pipe drilling, heating and bending. The heat treatment of materials is difficult to control, and the internal stress of machining is large. During the use of products, it is easy to cause risks such as rupture and perforation. It a...

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Problems solved by technology

[0004] The invention patent with the application publication number of CN111408804A discloses a gap-adjusting type curved hole electrolytic machining device and method. During the curved hole electrolytic machining process, the bellows 3 can push the cathode head 9 forward, and at the same time, it can move along the The cathode head 9 is bent and deformed in the direction of the cathode head 9. In this patent, the electrode head is tilted by adjusting the extension length of the gap adjustment head, so as to feed along the curved track. However, the device has the following defects: 1. When the cathode is inclined, the cathode head 9 An annular insulating ring 11 is provided on the upper side of the outer circumference of the cathode head 9 to prevent the short circuit from contacting the workpiece when the cathode head 9 is tilted, but the lower side of the outer circumference of the cathode head 9 is not provided with an annular insulating ring, and the lower side of the outer circumference of the cathode head 9 may still occur. The phenomenon of short circuit due to contact with the workpiece, so the reliability of the device is low; 2. The structure is complex, there is a risk of leakage of the liquid in the pressure tube, and the liquid pressure will fluctuate due to temperature changes during the processing, resulting in bending curvature control Inaccurate, low machining accuracy

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