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Micro and fine machining method for material difficult to machine

A finishing and difficult-to-machine technology, applied in the field of compound precision and micro special machining, it can solve the problems of increasing the energy of electrolysis, uneven electrolysis, and increasing current density, so as to improve the localized machining performance and improve the process of machining gap. , Improve the effect of machining accuracy

Active Publication Date: 2014-03-12
扬州健行电子科技有限公司
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  • Application Information

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Problems solved by technology

However, passivation will always occur due to micro-current density electrolysis, and passivation is eliminated by ultrasonic action. However, due to the small amplitude of ultrasonic vibration used and the small processing gap, sometimes due to the blocking effect of products in the processing gap, electrolytic passivation Incomplete elimination and uneven electrolysis will reduce the machining accuracy and efficiency; increasing the current density will increase the energy of electrolysis, the machining gap will become larger, and electrolytic stray corrosion will occur, making it difficult to obtain the effect of precision machining

Method used

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  • Micro and fine machining method for material difficult to machine
  • Micro and fine machining method for material difficult to machine

Examples

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example 1

[0057] Example 1: Fine discharge of square cone-shaped array of micro-pits on the surface of stainless steel 40Cr - electrolytic composite processing pulse power supply voltage amplitude 0V (full ultrasonic processing), 3V, 4V, 5V, frequency 5000Hz, duty ratio 5:5, system ultrasonic frequency The vibration resonance frequency is 17.32KHz, the ultrasonic amplitude is 0.05mm, the working fluid is 60% ethanol aqueous solution with 1% sodium nitrate, and 20-50 nanometer B4C is mixed in it, the contact static pressure between the workpiece and the electrode is 2.0N, and the processing time 3 minutes.

[0058] Composite ultrasonic frequency vibration fine discharge—the depth (i.e., efficiency) of electrolytic machining square cone micro-pit is significantly higher than that of single ultrasonic machining, the voltage amplitude increases, and the processing efficiency increases, but the gap increases due to electrolysis, and the pit size also increases. Among them, the accuracy and s...

example 2

[0059] Example 2: Carbide YBD151 micro-gear fine discharge-electrolytic composite machining DC power supply voltage amplitude 3V, system ultrasonic frequency vibration resonance frequency 17.46KHz, ultrasonic amplitude 0.09mm, contact static pressure between the workpiece and the fine cathode is 3.0N, The working solution is 60% ethanol aqueous solution with 0.5% sodium nitrate added, and 20-50 nanometers of B4C is mixed in it, and the processing time is 5 minutes.

[0060] Using a micro-electrode with an internal tooth-shaped hole, on a high wear-resistant matrix composite wear-resistant coating cemented carbide YBD151 material, the involute micro-gear with the number of teeth 22, the modulus 0.20mm, and the pressure angle 20o is nested. The thickness of the micro-gear is 0.30mm, the precision of the involute tooth shape can reach 0.001mm, and the roughness Ra of the tooth surface is 0.20μm.

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Abstract

The invention relates to a micro and fine machining method for a material difficult to machine and a machining system, belonging to the technical field of composite, precise, micro, fine and special machining. In the method and the machining system for implementing the method disclosed by the invention, ultrasonic modulation, low-voltage discharge and electrolysis are effectively compounded, a micro and fine discharge-electrolysis function is organically combined with ultrasonic frequency vibration identical frequency and synchronization, and discharge of machining products and circular update of a working fluid are realized under the actions of ultrasonic cavitation and spark discharge explosive force, so that a gap machining process is improved effectively, localized machining performance is enhanced, machining accuracy and surface quality can be further enhanced while high machining efficiency is achieved, machining can be realized in a static fluid simultaneously, and complex pressure flow and circular supply of the working fluid to the system is not required; and during processing, contact of the workpiece with an electrode under a certain constant pressure is kept, continuous and stepless micro pressure adjustment can be performed by using a magnetic adjusting mechanism, and a precision stable-speed micro feeding system necessary for electrolytic machining and a servo feeding system necessary for electric spark machining are not required, so that the equipment research cost can be reduced greatly.

Description

technical field [0001] The invention relates to a micro-finishing method for difficult-to-machine materials, and belongs to the technical field of compound precision and micro special processing. Background technique [0002] Difficult-to-machine materials (such as: electronic ceramics, high-temperature alloys, hard alloys, etc.), complex special-shaped surfaces (such as: three-dimensional curved surfaces, special-shaped holes, etc.) parts are more and more widely used in modern manufacturing. The processing problem has become a bottleneck problem restricting the technological progress of the manufacturing industry. [0003] Realizing the automation of the manufacturing system and seeking the precision and miniaturization of the limit of inherent manufacturing technology are two major development trends of modern manufacturing technology. The rapid development of modern industry requires that products have multiple functions in a limited space, so the requirements for ultra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H5/02B23H7/14B23H5/12B06B1/06
Inventor 朱永伟杜宇人
Owner 扬州健行电子科技有限公司
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