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Multifunctional integrated manufacturing system based on discharge machining

A manufacturing system and electric discharge machining technology, applied in the direction of electrode manufacturing, electric processing equipment, manufacturing tools, etc., can solve the problems of limited processing features, additive manufacturing functions that cannot realize the processing and manufacturing of small-sized parts, and low functional integration. Achieve the effect of high efficiency and precision processing characteristics, wide range of processing application and good processing effect

Active Publication Date: 2019-06-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material reduction method adopted is to remove the workpiece material by mechanical milling, which can realize high-precision machining of the workpiece, but the range of workpiece materials that can be processed is limited. For special environments such as navigation and aerospace, high-temperature alloys and titanium alloys are widely used. And difficult-to-cut materials represented by composite materials have the problems of high processing cost and low processing efficiency; in addition, there are cutting forces in the milling process, which often cause defects such as processing deformation during the processing of thin-walled parts, and the tool loss is serious, so it is necessary to carry A large number of different types of tools can meet the processing requirements
Furthermore, limited by the technical characteristics of arc additives, this composite processing system cannot realize the additive manufacturing of small-sized parts
[0006] To sum up, the functional integration of the existing additive and subtractive integrated manufacturing system is not high. The additive manufacturing function of the system cannot realize the processing and manufacturing of small-sized parts, while the subtractive manufacturing function has limited processing features or faces difficulties. Problems such as high processing cost, low processing efficiency, and the need for a large number of tool replacements when processing materials

Method used

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  • Multifunctional integrated manufacturing system based on discharge machining
  • Multifunctional integrated manufacturing system based on discharge machining
  • Multifunctional integrated manufacturing system based on discharge machining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] as attached image 3 The three-dimensional size of the frame parts shown is 600mm×310mm×40mm, and the material of the parts is nickel-based superalloy. The process of using the present invention to process and manufacture this part is:

[0069] ①. Set the power supply parameter output mode of the multifunctional composite discharge power supply 4 to the third gear (arc additive forming mode), set the current to 100A, and the working medium supply recovery unit 5 provides welding protection gas, and use the arc additive forming method to process Frame parts with finishing allowances;

[0070] ②. Set the power supply parameter output mode of the multifunctional composite discharge power supply 4 to gear 1 (arc high-efficiency processing mode), set the peak current to 500A, pulse width to 6ms, pulse interval to 4ms, open circuit voltage to 90V, and the working medium supply and recovery unit 5 to provide water base For the working fluid, two through holes and a square ca...

Embodiment 2

[0074] as attached Figure 4 There is a defect in the blade part shown, and the integrated manufacturing system of the present invention is used for additive manufacturing repair:

[0075] 1. Place the defective blade workpiece on the workbench 11, use the online detection function of the system of the present invention to optically scan the defect and reversely obtain the shape of the defect according to the original three-dimensional model of the workpiece;

[0076] ②. Set the power supply parameter output mode of the multifunctional composite discharge power supply 4 to gear 3 (arc additive forming mode), set the current to 100A, and supply the working medium to the recovery unit 5 to provide welding protection gas. According to the reverse obtained defect shape, Use arc additive forming to fill and repair the defect;

[0077] ③. Since the surface of arc additive forming is relatively rough, it needs to be finished. Set the power supply parameter output mode of the multif...

Embodiment 3

[0079] as attached Figure 5 The micro-electro-mechanical transmission system (MEMS) paddle part shown has a paddle shaft diameter of 0.2 mm, a height of 1.2 mm, a blade peripheral diameter of 1.6 mm, and a thickness of 0.2 mm, and the material of the parts is stainless steel. The process of using the present invention to process and manufacture this part is:

[0080] ①. Set the power supply parameter output mode of the multifunctional compound discharge power supply 4 to gear 2 (EDM precision machining mode), set the peak current to 5A, the pulse width to 10μs, the pulse interval to 20μs, the open circuit voltage to 120V, and the working medium supply recovery unit 5 to provide oil Based on the working fluid, the disc blank with a diameter of 1.8mm and a thickness of 0.2mm is subjected to EDM precision machining, and the attached image 3 blisks shown;

[0081] ②. Place the blisk processed in step ① on the workbench 11, and set the multifunctional composite discharge power ...

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Abstract

The invention discloses a multifunctional integrated manufacturing system based on discharge machining. The multifunctional integrated manufacturing system comprises a robot, a motion control unit, amultifunctional composite discharge power supply, a working medium supply and recovery unit, a wire feeding device, a tool head quick-change clamping unit, a discharge machining tool head, a welding tool head, a detection tool head and a workbench. According to the multifunctional integrated manufacturing system, the robot serves as an executing mechanism, and comprises four functions of a discharge additive manufacturing including an electric arc additive forming and a fine electric spark deposition forming, a discharge reduction machining including an electric arc high-efficiency machining and an electric spark precision machining process, an part connection based on electric arc surfacing and an on-line detection function based on optical scanning and ultrasonic flaw detection. According to the multifunctional integrated manufacturing system based on discharge machining, the integration degree is high, the machining and manufacturing of difficult-to-machine materials and micro-sizedparts are covered, and the high-efficiency and precise machining characteristics are achieved. The multifunctional integrated manufacturing system can be implemented in various media, gets rid of limitation of environment, is wide in application range, and has a very strong application prospect in the extreme environments such as outer space and deep sea.

Description

technical field [0001] The invention belongs to the field of mechanical processing and manufacturing, in particular to a multifunctional integrated manufacturing system based on electric discharge machining. Background technique [0002] Modern manufacturing technology can be divided into additive manufacturing (3D printing, etc.), subtractive manufacturing (cutting, special processing, etc.) and isomaterial manufacturing (plastic forming). The first two are the most important means of preparing parts. Additive manufacturing can melt and accumulate metal powder or wire to form. The shape of the raw material is simple, easy to store and transport, and the required shape can be printed out according to the actual situation. Subtractive manufacturing is currently the most commonly used processing method, among which cutting processing is to remove the blank allowance by turning, milling, planing, grinding and other methods to obtain parts with high precision, while special proc...

Claims

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Application Information

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IPC IPC(8): B23H5/00B23H5/14B23H11/00B23K9/04B23K9/16B33Y30/00
CPCB33Y30/00B23K9/044B23K9/173B23K9/32B23H1/00B23H7/30B23H7/14B23H7/10B23H1/10B23K9/04B23P23/00
Inventor 顾琳何国健
Owner SHANGHAI JIAO TONG UNIV
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