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Electrolytic milling tool cathode and method

A technology for processing tools and cathodes, which is applied in the field of electrolytic grinding composite processing, can solve the problems of large overcut, unfavorable electrolytic grinding and milling plane processing, and poor flatness, so as to reduce overcut, eliminate stray corrosion, The effect of simple structure

Active Publication Date: 2017-12-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In electrolytic milling, part of the electrolyte flows out of the machining gap from the bottom surface of the cathode of the tool. Due to the small gap between the cathode of the tool and the processed surface, the secondary erosion and stray of the cathode bottom and side walls on the processed surface Corrosion leads to large gouging and poor flatness, which is not conducive to the surface processing of electrolytic milling

Method used

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  • Electrolytic milling tool cathode and method
  • Electrolytic milling tool cathode and method
  • Electrolytic milling tool cathode and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this example, the figure 1 As shown in the tool cathode, the bottom end surface of the substrate is flat, and it is not insulated or plated with diamond abrasive grains. from Figure 5It can be seen from the simulated processing section diagram corresponding to the cathode of the tool that the bottom surface of the workpiece is concave, and the center of the bottom surface is the deepest groove, and the connection between the side wall and the bottom surface is arc-shaped. and Figure 7 The actual cross-sectional view of the cathodic electrolytic milling plane groove shown in the tool also shows that the bottom surface of the groove is a concave curved surface, and the depression is the most serious in the middle part. This is because during the processing, the electrolyte flows out from the bottom of the cathode along the opposite direction of feeding at a high speed. With this flow field as the medium, an electric field is formed between the bottom surface of th...

Embodiment 2

[0031] In this example, the figure 2 For the cathode of the tool shown, a groove with a depth of 0.3mm is completely processed on the bottom end of the substrate, and a waterproof and heat-resistant epoxy resin glue is coated in the groove, and then vacuumized and heat-cured, etc., so that the groove The bonding glue in the groove is closely and firmly combined with the tool cathode, and the bottom surface of the tool cathode is completely insulated at this time. from Figure 5 It can be seen from the simulated processing cross-section diagram corresponding to the cathode of the tool that the bottom surface of the workpiece is convex, and the center of the bottom surface is the shallowest part of the groove. At the same time, the connection between the side wall and the bottom surface is concave, and the connection point is the deepest groove. place. and Figure 8 The actual cross-sectional view of the cathodic electrolytic milling process plane groove shown in the tool al...

Embodiment 3

[0033] In this example, the image 3 The schematic diagram of the tool cathode shown in Fig. Figure 4 shown. Two conductive rings are machined on the bottom end of the cathode of the tool with a lathe, wherein the small ring is 0.2 mm wide and the large ring is 0.4 mm wide. The surface of the conductive ring is the bottom surface of the original cathode. The part of the bottom surface other than the conductive ring is a circular groove and an annular groove, both of which have a depth of 0.3mm. Coat waterproof and heat-resistant epoxy resin glue in the groove, and then vacuumize and bake and cure, so that the bonding glue in the groove and the tool cathode are closely and firmly combined. At this time, the bottom surface of the tool cathode is partially insulated. from Figure 5 As can be seen in the simulated processing section shown in the figure, compared with Example 2, the range of the upper convex curve in the middle of the groove bottom of this embodiment is signifi...

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Abstract

The invention relates to an electrolysis, grinding and milling machining tool cathode and a method and belongs to the field of electrolysis and grinding combined machining. The tool cathode comprises a rod-shaped base body (1) with the bottom end being a circular plane, wherein a central blind hole (3) is formed in the rod-shaped base body (1); liquid through grooves / holes (2) communicating with the central blind hole (3) are formed in the side wall of the rod-shaped base body (1), are located in the bottom end of the central blind hole (3) and are symmetrically distributed along the central axis of the blind hole; a central circular groove and a plurality of annular grooves concentric with the central circular groove are formed in the outer side of the bottom of the rod-shaped base body (1); and conducting rings and insulating rings are formed respectively. With the adoption of the cathode and the method, the secondary corrosion removal and stray corrosion influence of the bottom surface and the side wall of the tool cathode on a machined surface can be improved, the over-cutting amount of the bottom surface is reduced, and the planeness of the bottom surface of plane machining is improved.

Description

technical field [0001] The invention relates to a cathode of an electrolytic grinding and milling processing tool, which belongs to the field of electrolytic grinding compound processing. Background technique [0002] With the development of science and technology, a large number of difficult-to-cut metal materials such as titanium alloys, high-temperature alloys, hard alloys and stainless steels have been used in aviation, aerospace, navigation, petroleum and other industries. However, due to the influence of some inherent properties of the material itself, such as high hardness, poor thermal conductivity, and low elastic modulus, when mechanical processing methods are used, there are often rapid tool wear, high processing temperature, and serious surface hardening of the workpiece. , and there are shortcomings such as residual stress and easy deformation of the workpiece. These problems not only greatly increase the processing cost, but also seriously damage the performan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H5/10B23H5/08
CPCB23H5/08B23H5/10
Inventor 李寒松汪浩牛屾曲宁松付书星
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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