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Grinding method for thin wall guide tube with tungsten carbide coating

A tungsten carbide coating and thin-walled technology, which is applied in the direction of grinding workpiece supports, can solve problems such as cracks, restrictions on normal product delivery, and micro-cracks, and achieve the effect of improving positioning accuracy

Inactive Publication Date: 2019-01-29
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its sprayed tungsten carbide coating has the characteristics of low void ratio, high bonding strength and excellent wear resistance. Widely used; but limited by the process and coating properties, the surface roughness and shape tolerance of the original coating generally cannot meet the design requirements, and must be guaranteed by grinding
In actual production, due to poor control of links such as improper operation or unreasonable parameter selection, it often leads to thermal stress deformation of parts, coating peeling, cracks or micro-cracks and other defects, which seriously affect the coating quality and restrict the normal operation of the product. deliver

Method used

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  • Grinding method for thin wall guide tube with tungsten carbide coating
  • Grinding method for thin wall guide tube with tungsten carbide coating
  • Grinding method for thin wall guide tube with tungsten carbide coating

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specific Embodiment approach 1

[0168] Combine below Figure 1 to Figure 18 The technical solution provided by the present invention is described in more detail.

[0169] Such as Figures 1 to 3 and Figure 18 As shown, a grinding method of a tungsten carbide coated thin-wall guide cylinder fixture is based on grinding the fixture through the following steps, controlling the grinding action and the dressing action of the grinding wheel, and grinding the fixture by operating the grinding machine , improving the positioning accuracy of the workpiece;

[0170] The specific steps are as follows:

[0171] 1) Finely grind the tapered surface 2 of the center hole on both sides of the main body of the fixture 1;

[0172] 2) Use the central hole 3 to locate the outer diameter 4 of the main body of the fine grinding jig and the end face 5 of the shoulder;

[0173] 3) Finely grind the two planes of the end cover 33 with a surface grinder;

[0174] The specific implementation of the step 1) is to clamp the two cen...

specific Embodiment approach 2

[0181] Such as Figures 4 to 10 and Figure 18 Shown, described a kind of grinding method of tungsten carbide coating thin-walled guide cylinder, described grinding machine comprises:

[0182] The alleged head frame 14: the speed of the head frame spindle 53 is 20-220r / min (stepless), the head frame top 6-1 is Mohs 5#;

[0183] Alleged tailstock 16: tailstock top 6-2 is Mohs 4#;

[0184] The alleged grinding wheel frame 54: the linear velocity of the outer circular grinding wheels B, C, and D is 35m / s or 17.5m / s, the movement of the grinding wheel frame 54 is 1mm per revolution of the hand wheel 55; the feeding of the grinding wheel frame with one grid of the hand wheel 55 is the large hand wheel The moving amount of 55-1 is 0.005mm (coarse), the hand wheel 55 is fed by a small grinding wheel frame, the moving amount of 55-2 is 0.001mm (fine), the rapid advance and retreat of the grinding wheel frame 54 is 20mm, and the rotation angle of the grinding wheel frame 54 is ±30°;...

specific Embodiment approach 3

[0285] Such as Figure 11 to Figure 17 Shown, the grinding method of described a kind of tungsten carbide coating thin-walled guide cylinder, carry out grinding process control based on the outer contour of the tungsten carbide coated thin-walled guide cylinder is the control measures in the grinding process, the complaint grinding The steps of cutting process control measures are as follows:

[0286] 1) Before processing, check whether the coating in the area to be ground has defects such as pits and peeling;

[0287] 2) Grinding the base surface of the tungsten carbide coated thin-wall guide cylinder;

[0288] 3) After the center hole is ground, use the coloring method to check the contact between the center hole of the fixture body and the tip. The colored area of ​​the tip is more than 95% (uninterrupted along the circumference), and the center hole is cleaned;

[0289] 4) The maximum runout tolerance of the two top aligning tungsten carbide coated thin-wall guide cylind...

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Abstract

The invention discloses a grinding method for a thin wall guide tube with a tungsten carbide coating and particularly relates to the grinding method for the thin wall guide tube with the tungsten carbide coating and a fixture. According to the grinding method for the fixture, the fixture is ground by operating a grinding machine, and the positioning accuracy of workpieces is improved; according tothe grinding method for the thin wall guide tube with the tungsten carbide coating, grinding machining process parameters are confirmed on base of the grinding technical requirements for the outer outline (an outer circle, a transition circle angle, an end face and an end face chamfer) of the thin wall guide tube with the tungsten carbide coating, and grinding process control is performed on theouter outline of the thin wall guide tube with the tungsten carbide coating; by means of the grinding method for the thin wall guide tube with the tungsten carbide coating and the fixture, the fact that the grinding machine, the fixture, a grinding wheel and the workpieces form a complete process system in grinding is realized, in this way, occurrence of the coating grinding quality problem of aluminum alloy sleeve type thin-wall parts of some type is completely eradicated, and the long-term practice test is performed, the qualified rate of the parts is increased, and the grinding method for the thin wall guide tube with the tungsten carbide coating and the fixture has reference significance in guiding production.

Description

technical field [0001] The invention relates to the technical field of grinding tungsten carbide coated thin-walled workpieces and other coatings with high hardness, and particularly provides a novel grinding method, which belongs to the technical field of high-efficiency and precise grinding of difficult-to-machine materials. Background technique [0002] Tungsten carbide (Tungsten Carbide) is a compound composed of tungsten and carbon, gray powder with metallic luster, tungsten carbide is chemically stable, very hard, and has a large elastic modulus. Tungsten carbide is widely used as high-speed cutting turning tools, kiln structural materials, jet engine parts, resistance heating elements, etc. It is used to manufacture cutting tools and wear-resistant parts. The specific use requirements of cemented carbide are different. The requirements for the particle size of tungsten carbide Also different. Before, I have submitted a utility model application to the National Patent...

Claims

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Application Information

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IPC IPC(8): B24B1/00B24B41/06
CPCB24B1/00B24B41/06
Inventor 刘献礼崔玉龙周亚栋李景帅
Owner HARBIN UNIV OF SCI & TECH
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