Multi-layer feeding process method of hot-press grinding rail grinding wheel

A process method and technology of grinding wheel, applied in abrasives, grinding devices, manufacturing tools, etc., to achieve good wear resistance, reduce resin loss, and high wear resistance

Active Publication Date: 2022-07-05
江苏新砺河磨具科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the difficulty of improving the wear resistance of the grinding wheel for rail grinding, and aiming at the problem of resin extrusion from the mold gap when the high-hardness, high-density grinding wheel formula is hot-pressed, different formula material layers are designed on the upper and lower end surfaces of the mold to block the middle material. After the binder is heated and softened, it is extruded from the green body. The specific process is:

Method used

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  • Multi-layer feeding process method of hot-press grinding rail grinding wheel
  • Multi-layer feeding process method of hot-press grinding rail grinding wheel
  • Multi-layer feeding process method of hot-press grinding rail grinding wheel

Examples

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Effect test

Embodiment 1

[0043] The rail grinding wheel for the production of GMC96X grinding car is 260×90×153ZA14Y3B 50m / s, and the grinding service life should reach at least 130km.

[0044] 1) Design and calculate the volume of each material layer according to the total thickness of the grinding wheel, the thickness of the clamping part and the process requirements. The data is shown in the following table:

[0045] Layer Thickness and Volume Table

[0046]

[0047] 2) According to the designed hierarchical formula with different characteristics, the weight percentage of each component is calculated from the volume percentage, and then the respective feeding amounts are calculated according to the molding density, and the batching list is issued for the mixing operation.

[0048] The weight percentage is calculated from the volume percentage, and the total 100% weight ratio of each component can be calculated item by item as follows: Wi=Vi·di / r

[0049] In the formula: Wi—the weight percentag...

Embodiment 2

[0054] For rail grinding wheel 250×75×150 ZA16Y3B 50m / s grinding service life should reach at least 120km. This is an end-face grinding wheel with no metal base and clamped on the outer circumference.

[0055] 1) Design and calculate the volume of each material layer according to the total thickness of the grinding wheel, the thickness of the clamping part and the process requirements. The data is shown in the following table:

[0056] Layer Thickness and Volume Table

[0057]

[0058] 2) According to the designed hierarchical formula with different characteristics, the weight percentage of each component is calculated from the volume percentage, and then the respective feeding amounts are calculated according to the molding density, and the batching list is issued for the mixing operation.

[0059] 3) Weigh the layered feeding weight of each grinding wheel blank separately, cast the bottom material, the middle layer material and the upper material in sequence and spread ...

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Abstract

The invention discloses a multi-layer feeding process method for a hot-press grinding rail grinding wheel, which belongs to the technical field of grinding wheel manufacturing technology. Preliminarily solidified grinding wheel blank is formed by pre-pressing and hot pressing after mold closing, forming a hot extrusion material barrier layer with appropriate thickness on the upper and lower parts of the grinding wheel blank, so that each layer of the blank is under the same temperature and pressure conditions. Next, the barrier softening binder is squeezed out of the surface layer. The invention can prevent the loss of the binder of the high-hardness and high-density grinding wheel during hot pressing due to extrusion, maintains the high resin content and compactness of the grinding wheel as a whole, reduces the resin loss, and provides a prerequisite for the grinding wheel to further improve the wear resistance. condition.

Description

technical field [0001] The invention belongs to the technical field of grinding wheel manufacturing technology, which is an improvement on the manufacturing process of a super-hard high-wear-resistance rail grinding wheel, in particular a multi-layer feeding process method for a hot-press grinding rail grinding wheel. Background technique [0002] The domestic GMC96X and GMC96B rail grinding trains are driven by the locomotive, and the rails are ground simultaneously by 96 grinding wheels. The grinding head adopts the vertical axis vertical grinding method, and the end face of the grinding wheel is used for grinding. The linear speed of the grinding wheel is 50m / s, the grinding contact surface is large, the grinding heat is high, and it is easy to cause burns on the surface of the rail. Grinding wheel manufacturers often choose formulas with slightly lower hardness, and use lower grinding wheel wear resistance to prevent burn blue spots on the surface of the rails being grou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D18/00B24D3/28B24D3/34
CPCB24D18/0009B24D3/28B24D3/344
Inventor 仲怀民
Owner 江苏新砺河磨具科技有限公司
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