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A combination system of hot-press forming of abrasives

A technology of hot-press molding and abrasives, which is applied in transportation, packaging, and metal processing equipment, etc., which can solve the problems of easy decomposition of resin and poor thermal stability of abrasives, and achieve the advantages of easy control, long service life and guaranteed stability. Effect

Active Publication Date: 2022-03-08
马鞍山市雷狮轨道交通装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the existing abrasives adopt a single thermosetting phenolic resin mixed with metal powder for dry molding, and the resin is prone to decompose at high temperature, resulting in poor thermal stability of the abrasives, the present invention provides a combination system for thermal press molding of abrasives , improve the high-temperature bonding strength of the grinding wheel, stable performance, safe and reliable use

Method used

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  • A combination system of hot-press forming of abrasives

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Effect test

Embodiment 1

[0032] The present invention will be described below with reference to specific examples. Those skilled in the art can understand that these examples are only used to illustrate the present invention and do not limit the scope of the present invention in any way.

[0033]Metal iron powder and carbon fiber are the main raw materials, of which iron powder content is 73%, carbon fiber content is 15%, thermoplastic phenolic resin is 0.5%, thermosetting resin is 3.5%, anhydrous borax is 1%, ethylene glycol is 1%, and dimethyl carbonate is 6%. %, mixed and granulated by a rake mixer, and hot-pressed.

[0034] After forming, the sample is cut and inspected. The performance of the product is tested by the friction testing machine as follows: torque at room temperature: 8.1, torque at 300°C: 8.26, torque at 500°C: 8.20.

Embodiment 2

[0036] Metal iron powder and aramid fiber are the main raw materials, of which iron powder content is 72%, aramid fiber content is 12%, thermoplastic phenolic resin is 0.7%, thermosetting resin is 4.9%, anhydrous borax is 1.4%, ethylene glycol is 2%, carbonic acid Dimethyl fat 7%, mixed and granulated by a plow mixer, and hot-pressed.

[0037] After forming, the sample is cut and inspected, and the performance of the product is tested by the friction testing machine as follows: torque at room temperature: 8.18, torque at 300°C: 8.22, torque at 500°C: 8.19.

Embodiment 3

[0039] Metal iron powder and copper fiber are the main raw materials, of which iron powder content is 75%, aramid fiber content is 10%, thermoplastic phenolic resin is 0.7%, thermosetting resin is 4.9%, boron glass powder is 1.4%, ethylene glycol is 1.5%, mixed with two Dimethyl dibasic acid 6.5%, kneaded and granulated by plow-rake mixer, and hot-pressed.

[0040] After forming, the sample is cut and inspected. The performance of the product is tested by the friction testing machine as follows: torque at room temperature: 8.23, torque at 300°C: 8.25, torque at 500°C: 8.47.

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Abstract

The invention discloses a hot-press forming combination system of grinding elements, which belongs to the field of rail transit equipment manufacturing. The bonding system includes two parts: a bonding agent and a solvent, wherein the bonding agent is composed of an organic bonding agent and an inorganic bonding agent in a ratio of 4:1; the solvent is composed of a dispersant and an environmentally friendly solvent, and the dispersant and the environmentally friendly solvent are composed of The ratio is 1: (3-6); the total amount of binder added is 5-10% of the total amount of grinding sub-ingredients, the amount of dispersant added is 1-2% of the total amount of grinding sub-ingredients, and the amount of environmentally friendly solvent added is 5-10% of the total amount of sub-ingredients. The system adopts the effective combination of organic binder and inorganic binder, and through the mutual synergy between the binders, the bonding strength of the whole system can meet certain design requirements and meet the high-temperature bonding strength requirements of the grinding wheel. It is not easy to slag off and has a long service life.

Description

technical field [0001] The invention belongs to the field of rail transit equipment manufacturing, and more specifically relates to a hot-press forming combination system of grinding elements. Background technique [0002] The tread cleaner plays the role of cleaning the wheel and increasing the wheel-rail adhesion coefficient to ensure the safety of the service brake. The part of the tread cleaner that directly acts on the wheel is called a grinder. Abrasives are a structural component with the functions of cleaning, thickening, and shape modification in high-speed train running. Its production is mainly based on metal powder and fiber, mixed with an appropriate bonding system, and then hot-pressed on a press. The combination system generally adopts a relatively simple thermosetting phenolic resin, which is mixed with metal powder and then directly formed by dry method. The grinding wheel produced by this method has a large amount of dust, which is easy to be classified dur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/14C22C49/08B22F1/103B22F1/105C22C101/10C22C101/08C22C111/00
CPCC22C47/14C22C49/08B22F1/105B22F1/107
Inventor 贺子铭彭程林
Owner 马鞍山市雷狮轨道交通装备有限公司
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