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A Fixture for Milling and Grinding of Precision Hemispherical Parts

A technology of hemispheres and parts, applied in the direction of manufacturing tools, metal processing equipment, metal processing machinery parts, etc., can solve the problems of uncontrollable word uniformity and complex mechanism, so as to ensure reliability and durability, improve positioning accuracy, and avoid The effect of stress concentration

Active Publication Date: 2021-02-09
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently, the milling buffer mechanism is installed on the grinding wheel, the mechanism is complicated, and the uniformity of the word cannot be controlled during milling

Method used

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  • A Fixture for Milling and Grinding of Precision Hemispherical Parts
  • A Fixture for Milling and Grinding of Precision Hemispherical Parts
  • A Fixture for Milling and Grinding of Precision Hemispherical Parts

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Embodiment

[0033]A fixture for milling and grinding precision hemispherical parts, such asfigure 1 , It is mainly composed of base and connecting rod.

[0034]Such asfigure 2 , The main body of the base is a tapered thin-walled structure with a wall thickness of 1mm. There are 24 horizontal slender grooves evenly distributed on the cone surface. The groove width is 1mm. The vertical distance between the grooves is 1mm. The horizontal section of the grooves is arc-shaped and round. The arc is 270°, and the arc grooves of each layer are distributed across the vertical plane. Both ends of the groove are semi-circular with a radius of 0.5mm to avoid areas of stress concentration due to deformation.

[0035]The base material is beryllium bronze with a modulus of elasticity of 1.28×105MPa, Poisson's ratio 0.29, yield strength 1.17×103MPa, can realize the micro displacement of the flexible structure.

[0036]The top of the base is a positioning plane, the center has a connecting rod mounting hole, the hole di...

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PUM

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Abstract

The invention relates to a fixture for milling and grinding of precision hemispherical parts, comprising: a hemispherical part, a connecting rod and a base. The positioning hole is used to install the connecting rod; the diameter of the bottom surface of the base is at least twice the diameter of the top surface, and is connected with the processing equipment; the hemispherical part is installed on the upper end of the connecting rod, and is positioned by the top surface and outer circle of the connecting rod; the cone of the tapered thin-walled structure Multi-layer horizontal slender grooves are evenly distributed on the surface, and the vertical distance between the grooves is consistent with the width of the slender grooves. When the parts are processed, elastic deformation occurs with different milling pressures, and the positioning of the hemispherical parts is adjusted adaptively; the two ends of the groove are semicircular to avoid areas of stress concentration due to deformation. The invention ensures the quality and efficiency of the milling and grinding process of the precision hemispherical parts, and meets the requirements of the precision and surface roughness of the parts.

Description

Technical field[0001]The invention belongs to the technical field of mechanical processing, and relates to a fixture for milling and grinding precision hemispherical parts.Background technique[0002]Precision hemispherical parts Precision hemispherical parts have small size (ball diameter less than 15mm) and high accuracy. The roundness of the circular section is less than or equal to 0.3μm, the surface roughness Ra is less than or equal to 0.025μm, and the surface of the part has TiN coating before milling. , The thickness of the film is 0.02-0.03mm, and the amount of the film removed during the milling process is within the range of 0.005-0.015mm; the final accuracy requirements of the parts must be achieved through multiple milling processes.[0003]The milling processing method is more efficient, the amount of material removed per unit time is large, and the cutting force is correspondingly large. If there is a large difference in the pressure of the grinding head on the part durin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B41/06B23Q3/06
CPCB23Q3/062B24B41/067
Inventor 唐照芳邱增帅
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES