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Preparation method of graded composite electrode for laser three-dimensional forming electric discharge rough and fine machining

A technology of laser three-dimensional forming and composite electrodes, which is applied in the direction of electric processing equipment, electrode manufacturing, metal processing equipment, etc., can solve the problems of affecting the processing accuracy of workpieces and reducing processing efficiency, so as to improve processing quality, improve uniformity, and improve balance sexual effect

Active Publication Date: 2017-04-12
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, two kinds of electrodes with different precision are used to process the workpiece twice successively, and the electrode is replaced in the middle, which reduces the processing efficiency; at the same time, due to the need to clamp the electrodes twice, the difference in the clamping position will also Affect the machining accuracy of the workpiece

Method used

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  • Preparation method of graded composite electrode for laser three-dimensional forming electric discharge rough and fine machining
  • Preparation method of graded composite electrode for laser three-dimensional forming electric discharge rough and fine machining
  • Preparation method of graded composite electrode for laser three-dimensional forming electric discharge rough and fine machining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A Cu-based SiC composite micropowder for an electric discharge tool electrode was prepared according to the following steps in turn:

[0035] a. SiC is made into particles with a particle size of 3um, and the electroless plating solution is made by dissolving 14 mass parts of copper sulfate pentahydrate, 25 mass parts of formaldehyde and 10 mass parts of sodium hydroxide in 1000 mass parts of water, SiC The particles are put into the electroless plating solution for surface electroless copper plating and dried. The mass ratio of SiC particles to electroless plating solution is 1:10 to obtain SiC copper-plated particles; the working temperature of electroless copper plating is 80°C and the time is 3 hours ;

[0036] b. Heating metallic pure Cu to 1150°C to prepare Cu melt;

[0037] c. If figure 1 As shown, a conduit 2 is set in the funnel 1, the lower end of the conduit 2 is located at the nozzle 8 at the bottom of the funnel 1, and the upper end is connected to the hi...

Embodiment 2

[0046] The difference between this embodiment and embodiment one is that the particle diameter of the SiC particles in step a is 4um, the mass fraction of copper sulfate pentahydrate in the electroless plating solution is 15 parts, the mass fraction of formaldehyde is 28 parts, hydrogen The mass fraction of sodium oxide is 11 parts; the heating temperature of metal pure Cu in step b is 1165°C; the gas supply pressure of the gas supply device 6 in step c is 1.3MPa; the sieve mesh number of the composite micropowder in step d is 125 mesh.

[0047] The thickness of the slice in step (1) is 0.3mm; the ultrasonic vibration power in step (2) is 90W, the amplitude is 1.5um; the diameter of the laser beam is 1.5mm, the laser power is 3.5KW, the scanning speed is 8mm / s, the coaxial The powder amount is 7g / min; the beam diameter in step (3) is 1.5mm, the laser power is 5KW, the scanning speed is 4mm / s, the coaxial powder feeding amount of the laser is 7g / min, the Cu powder diameter is 70...

Embodiment 3

[0049] The difference between this embodiment and Example 1 is that the particle diameter of the SiC particles in step a is 5um, the mass fraction of copper sulfate pentahydrate in the electroless plating solution is 16 parts, the mass fraction of formaldehyde is 32 parts, hydrogen The mass fraction of sodium oxide is 12 parts; the heating temperature of metallic pure Cu in step b is 1180° C.; the gas supply pressure of the gas supply device 6 in step c is 1.4 MPa; the sieve mesh number of the composite micropowder in step d is 150 mesh.

[0050] The slice thickness in step (1) is 0.4mm; the ultrasonic vibration power in step (2) is 100W, the amplitude is 2um; the laser beam diameter is 2mm, the laser power is 4KW, the scanning speed is 9mm / s, and the coaxial powder feeding amount is 8g / min; in step (3), the beam diameter is 2mm, the laser power is 6KW, the scanning speed is 5mm / s, the coaxial powder feeding amount of the laser is 8g / min, the Cu powder diameter is 80um, and the...

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Abstract

The invention discloses a preparation method of a gradient composite electrode for laser three-dimensional forming electric discharge rough and fine machining, which belongs to the technical field of electric discharge machining, and uses software to generate a three-dimensional solid model, slices and layers the model, and obtains the parameters of each slice layer ; Then use laser to sinter Cu-based SiC composite micro-powder on the vibrating substrate according to the shape parameters of inner slice layers; finally use laser to mix and sinter Cu powder and graphite powder on Cu-based SiC composite deposition according to the shape parameters of outer slice layers layer. The electrode prepared by this method has a gradient structure, and the Cu-based graphite deposition layer located on the outer layer of the electrode is discharged first to realize the rough machining of the workpiece; then the Cu-based SiC deposition layer of the electrode is used to complete the finishing of the workpiece; The composite micropowder is formed by spraying and cooling SiC particles in Cu melt with nitrogen gas, which improves the uniformity of SiC particle distribution and improves the balance of electrode corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of electric discharge machining, and in particular relates to a preparation method of a gradient composite electrode for laser three-dimensional forming electric discharge rough and finish machining. Background technique [0002] Due to the incomparable advantages of other processing methods in processing special performance materials, complex structures and micro parts, EDM technology has been gradually promoted and applied in recent years. In the process of EDM, the electrode material that is melted, gasified, and exploded not only removes the material of the workpiece, but also removes the material of the tool electrode. Loss, while the loss of the tool electrode is directly mapped to the workpiece, affecting its forming accuracy. [0003] In order to improve the forming accuracy of the workpiece, some experts and scholars have invested in the research of tool electrodes. Among them, Associate Professor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H1/04B23H1/06
CPCB22F3/105B23H1/04B23H1/06
Inventor 李丽王东田忠强
Owner SHANDONG UNIV OF TECH
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