Method for deburring and polishing precision part through low-pressure beam spraying

A technology for precision parts and deburring, which is applied in the field of machining of precision parts to achieve the effect of improving roughness and surface quality

Active Publication Date: 2021-06-22
陕西金信天钛材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) Hardly change any size and surface accuracy of parts

Method used

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  • Method for deburring and polishing precision part through low-pressure beam spraying
  • Method for deburring and polishing precision part through low-pressure beam spraying
  • Method for deburring and polishing precision part through low-pressure beam spraying

Examples

Experimental program
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Effect test

Embodiment 1

[0046] For precision bolts, surface burrs are removed, and the surface roughness Ra reaches below 3.2μm.

[0047] The method for deburring and polishing precision parts using low-pressure jets described in this embodiment includes the following steps: first, evaluate the size of the burrs on the original surface of the precision parts to be within 1-10 mm, and pick out the burrs within 1-10 mm by means of tweezers, etc. Make the burrs ≤ 1mm; secondly, select A abrasive grains according to the burr size and adjust the spray pressure to 0.2~0.3MPa; finally, use A abrasive grains and spray pressure to remove the burrs on the surface of precision parts at one time to achieve the surface roughness of precision parts Ra is 1.2 ~ 1.6μm processing requirements, to meet the requirements of 3.2μm or less. See Figure 5 , After the bolt is finished, not only the surface burr is removed, but also the surface roughness meets the requirements.

[0048] In this embodiment, the mass ratio o...

Embodiment 2

[0052] Stainless steel mesh screen, remove the burr on the surface hole to achieve a smooth transition, and its surface roughness Ra must reach 1.0μm.

[0053] The method for deburring and polishing a precision part by using a low-pressure spray jet described in this embodiment includes the following steps: first, evaluate the size of the burr on the original surface of the precision part to be 0.05-0.1 mm. Secondly, select B abrasive grains and adjust the spray pressure to 0.05-0.2MPa. Finally, use B abrasive grains and spray pressure to remove the burrs on the surface of precision parts twice to achieve a surface roughness Ra of 0.8-1.0μm. Processing requirements, there is a thin oxide scale. See Figure 6 , Before finishing, there are many burrs on the edge of the hole on the surface of the stainless steel mesh screen. In order to achieve a circular arc transition, the burr on the edge of the hole is removed after finishing, and the surface roughness meets the requirement ...

Embodiment 3

[0058] For radar antennas, the surface needs to be free of burrs, and the surface roughness Ra needs to be below 0.8 μm.

[0059] The method for deburring and polishing a precision part by using a low-pressure jet described in this embodiment includes the following steps: first, evaluate the size of the burr on the original surface of the precision part to be Figure 7 , before finishing, the burr on the original surface of the radar antenna is <0.1mm, and there are knife lines; after finishing, the burrs in the slot are completely removed and the surface knife lines disappear, and the surface roughness meets the requirements.

[0060]In this embodiment, the mass ratios of the components of C abrasive grains: cerium oxide powder: boron carbide: artificial diamond powder: chromium oxide are (0.25-0.4): (0.2-0.4): (0.3-0.5): (0.01-0.1) ; Can be arbitrarily selected within the above-mentioned component mass ratio range.

[0061] The best choice is the components of C abrasive gra...

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Abstract

The invention belongs to the technical field of precision part machining, and particularly relates to a method for deburring and polishing a precision part through low-pressure beam spraying. The method comprises the following steps that firstly, the size of burrs on the original surface of the precision part is evaluated; secondly, the abrasive particle type and the beam spraying pressure are selected according to the size of the burrs; and finally, the burrs on the surface of the precision part are removed once or multiple times through the selected abrasive particle type and the selected beam spraying pressure so as to meet the machining requirement for the surface roughness Ra of the precision part. By means of the method, deburring and polishing not limited by the structural complexity and the micro crack / hole / groove structure of the part can be realized, meanwhile, it is almost unnecessary to change any size and surface precision of the part, and no damage layer or metamorphic layer or corrosion layer is generated on the surface.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing of precision parts, and in particular relates to a method for deburring and polishing precision parts by using low-pressure spray beams. , Removal of knife lines and scratches, and improvement of surface quality such as surface polishing of parts. Background technique [0002] In the prior art, the burrs are mainly deburred by hand, sandblasting, abrasive flow, thermal explosion and other auxiliary methods such as electrolysis / chemical / ultrasonic / magnetic grinding. [0003] (1) Manual: Use such as saw blades, files or specially prepared trimming knives to scratch and remove the burrs on the edge of the parts. The problems are as follows: uneven removal; difficult to remove tiny burrs; insufficient reliability: due to negligence of workers or poor craftsmanship Unclean removal of burrs; low efficiency; burr particles and dust are not friendly to the body and the environment; areas su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24C1/08
CPCB24C1/083
Inventor 米天健
Owner 陕西金信天钛材料科技有限公司
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