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A kind of slurry direct writing forming method of diamond tool

A diamond tool, direct writing molding technology, applied in the direction of manufacturing tools, metal processing equipment, abrasives, etc., can solve the problems of shape change, unfavorable product quality control, large dimensional shrinkage, etc., and achieve high consistency and controllable porosity , good cooling effect

Active Publication Date: 2022-07-29
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the vitrified bond powder commonly used in the current slurry direct writing molding technology is based on SiO 2 As the main component, the size shrinkage rate after sintering is large (about 20%-30%), and the shape changes obviously, which is not conducive to the quality control of the final product

Method used

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  • A kind of slurry direct writing forming method of diamond tool
  • A kind of slurry direct writing forming method of diamond tool
  • A kind of slurry direct writing forming method of diamond tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) mixing silicon powder, sodium oxide, aluminum oxide, potassium oxide and diboron trioxide in the weight parts shown in the following table 1 with a mixer at a rotating speed of 600r / min for 4h to obtain nano-ceramic powder;

[0035] Table 1

[0036]

[0037]

[0038] (2) fully dispersing the xanthan gum in deionized water (using a mixer to stir 90min at a rotating speed of 800r / min) to obtain a xanthan gum solution with a concentration of 3wt%;

[0039] (3) uniformly mixing the nano-ceramic powder obtained in step (1) with the xanthan gum solution obtained in step (2) to obtain slurry, and the volume ratio of the mixed powder to the xanthan gum solution is 70%: 30% ;

[0040] (4) adding the slurry obtained in step (3) into the barrel of the slurry direct writing molding equipment, and printing the designed shape by layer-by-layer superimposition to obtain a blank; the process parameters of the printing are: the printing speed of the needle head 4mm / min, the ...

Embodiment 2

[0045] (1) mixing silicon powder, sodium oxide, aluminum oxide, potassium oxide and diboron trioxide in the weight parts shown in the following table 3 with a mixer for 4h at a rotating speed of 600r / min to obtain nano-ceramic powder;

[0046] table 3

[0047] serial number Silicon powder sodium oxide Alumina Potassium oxide boron trioxide 1 70 5 12 3 10 2 67 5 12 3 10 3 64 5 12 3 10 4 61 5 12 3 10

[0048] Step (2) to step (5) are with embodiment 1, the performance of the diamond tool that the nano-ceramic powder of different formulas in table 3 makes is as shown in table 4 below:

[0049] Table 4

[0050] Numbering Dimensional change rate (%) Flexural strength (MPa) Compressive strength (MPa) 1 0.16 56.2 50.2 2 0.28 54.3 49.3 3 0.37 52.8 47.1 4 0.45 50.7 45.9

[0051] Combined with the data of Example 1, it is determined that the melting point of the nano-ceramic powde...

Embodiment 3

[0053] (1) the nano-ceramic powder, PMMA and W10 diamond microparticles determined in Example 2 are mixed for 4h at the rotating speed of 600r / min with a mixer in the ratio shown in the following table 5 to obtain mixed powder;

[0054] table 5

[0055] serial number Nano ceramic powder (%) W10 Diamond (%) Pore ​​former PMMA (%) 1 75 20 5 2 70 20 10 3 65 20 15 4 60 20 20

[0056] (2) fully dispersing the xanthan gum in deionized water (using a mixer to stir 90min at a rotating speed of 800r / min) to obtain a xanthan gum solution with a concentration of 3wt%;

[0057] (3) uniformly mixing the mixed powder obtained in step (1) with the xanthan gum solution obtained in step (2) to obtain a slurry, and the volume ratio of the mixed powder to the xanthan gum solution is 70%:30%;

[0058] (4) adding the slurry obtained in step (3) into the barrel of the slurry direct writing molding equipment, and printing the designed shape by layer-b...

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Abstract

The invention discloses a slurry direct writing method for diamond tools, comprising the following steps: (1) fully mixing nano-ceramic powder, PMMA and diamond micro-particles to obtain mixed powder; (2) fully dispersing xanthan gum in In deionized water, a xanthan gum solution is obtained; (3) the mixed powder obtained in step (1) is uniformly mixed with the xanthan gum solution obtained in step (2) to obtain a slurry; (4) the mixed powder obtained in step (3) is mixed evenly; The obtained slurry is added to the barrel of the slurry direct writing molding equipment, and is printed into a designed shape by layer-by-layer stacking to obtain a green body; (5) the green body obtained in step (4) is dried to a constant weight, and then Sintering is performed to obtain the diamond tool. The present invention utilizes slurry direct writing to manufacture a diamond tool with a complex structure at one time, and the diamond tool has high consistency, suitable mechanical properties, controllable porosity and high shape accuracy.

Description

technical field [0001] The invention belongs to the technical field of abrasive materials, in particular to a slurry direct writing method for diamond tools. Background technique [0002] Diamond abrasive is a kind of superhard material abrasive. The hardness of diamond is extremely high, the grinding ability is strong, and the abrasive wear is small. It is widely used in grinding tools such as grinding wheels, grinding discs, and dressing plates. In diamond abrasive tools, bond is another important component. Commonly used binders are mainly divided into three categories: resin binders, metal binders and ceramic binders. Among them, the ceramic bond is sintered by glass or ceramic substances to consolidate the diamond abrasive, and the ceramic bond and the diamond abrasive have good bonding strength under grinding conditions. The vitrified bond diamond abrasive tool has more pores, which is conducive to cooling and chip removal. The abrasive tool has good self-sharpening...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/06C04B35/14C04B35/622B24D3/14B24D18/00B33Y70/10B33Y10/00
CPCC04B38/067C04B35/14C04B35/62204B24D3/14B24D18/009B33Y70/10B33Y10/00C04B2235/427C04B2235/3409C04B2235/3217C04B2235/3201
Inventor 陆静王艳辉黄景銮
Owner HUAQIAO UNIVERSITY
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