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Resin and corundum composite grinding wheel provided with brazed diamond insert pieces and manufacturing process thereof

A manufacturing process and diamond technology, which is applied in the field of brazed diamond-inserted resin-corundum composite grinding wheel and its manufacturing process, can solve the problems of easy burns on the grinding surface, low grinding capacity of rigid grinding wheels, and low grinding efficiency. The effect of improving the quality of the polished surface, increasing the working life and reducing the working intensity

Inactive Publication Date: 2018-06-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems in the prior art of rigid grinding wheels such as low grinding capacity, large consumption, prone to burns on the grinding surface, and low grinding efficiency, the invention discloses a brazed diamond insert resin zirconium corundum composite The manufacturing process of the grinding wheel, using the high toughness and high holding force of single-layer brazed diamond, combined with the toughness of the resin grinding wheel and the characteristics of multi-layer grinding and non-stick iron, successfully applied diamond abrasive grains to dry steel grinding field, which solves the above defects and increases the life of the grinding wheel to a certain extent

Method used

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  • Resin and corundum composite grinding wheel provided with brazed diamond insert pieces and manufacturing process thereof
  • Resin and corundum composite grinding wheel provided with brazed diamond insert pieces and manufacturing process thereof
  • Resin and corundum composite grinding wheel provided with brazed diamond insert pieces and manufacturing process thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0036] The invention discloses a preparation process of a grinding insert grinding wheel with an outer diameter of 150 mm. Specific steps are as follows:

[0037] Step 1: Make brazed diamond inserts: According to the actual effective working thickness of the 150mm-diameter rail grinding wheel, use 303 stainless steel with a thickness of 0.2mm to cut and make an insert base with a length of 55mm and a width of 20mm. 40 / 45 mesh diamonds are used as brazing abrasive grains, which are randomly arranged on both sides of the insert substrate, and the density of abrasive grains on one side is 60%. Using nickel-based brazing diamond filler metal, the diamond abrasive is brazed and consolidated through a vacuum brazing furnace;

[0038] Step 2: Insert the corresponding number of inserts: In order to make the diamond abrasive grains on the inserts and the corundum abrasives in the resin alternately grind, the value of k in the calculation formula is 0.5. The design insert placement an...

Embodiment 2

[0043] A preparation process of a composite grinding wheel for rail grinding with an outer diameter of 250mm. Specific steps are as follows:

[0044] Step 1: Making brazed diamond inserts: According to the actual effective working thickness of the 250mm-diameter rail grinding wheel, use 303 stainless steel with a thickness of 0.3mm to cut and make an insert base with a length of 30mm and a width of 22mm. 35 / 40 mesh diamond is selected as brazing abrasive grains, which are arranged randomly on both sides of the insert substrate, and the density of abrasive grains on one side is 65%. Using nickel-based brazing diamond filler metal, the diamond abrasive is brazed and consolidated in a vacuum brazing furnace.

[0045] Step 2: Insert the corresponding number of inserts: design and place the upper and lower layers of brazed diamond inserts in the grinding wheel. The diamond abrasive grains on the inserts and the corundum abrasives in the resin are alternately ground. The k value in t...

Embodiment 3

[0050] A preparation process of a composite grinding wheel for rail grinding with an outer diameter of 260mm. Specific steps are as follows:

[0051] Step 1: Make brazed diamond inserts. According to the actual effective working thickness of the 260mm-diameter rail grinding wheel, use 303 stainless steel with a thickness of 0.3mm to cut and manufacture the insert substrate with a length of 60mm and a width of 24mm. 30 / 35 mesh diamond is selected as the brazing abrasive grain, on both sides of the insert substrate such as image 3 Arranged in an orderly manner as shown, the density of abrasive grains on one side is 70%. Using nickel-based brazing diamond filler metal, the diamond abrasive is brazed and consolidated in a vacuum brazing furnace.

[0052] Step 2: In order to make the inserts can continuously participate in the grinding work during grinding, take the value of k in the calculation formula as 1. The design insert placement angle r is 60°, the central circle radiu...

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Abstract

The invention discloses a resin and corundum composite grinding wheel provided with brazed diamond insert pieces and a manufacturing process thereof and belongs to the field of steel grinding. The grinding wheel is a composite grinding wheel combining brazed diamond and a resin grinding wheel. The manufacturing process comprises the following steps that firstly, the brazed diamond insert pieces are manufactured; secondly, a resin mixture is prepared according to the size of the manufacturing grinding wheel, and the insert pieces with the corresponding number are placed into the resin mixture;and thirdly, subsequent grinding wheel manufacturing is conducted. The high pullout strength of a single-layer brazed diamond tool, the high exposed degree and high sharpness of the diamond and the original certain toughness of the resin grinding wheel are combined, multilayer composite grinding of the brazed diamond is achieved, and the defects that the thickness of a work layer of the single-layer brazed diamond tool is limited, and iron is likely to be stuck to grinding steel are remedied; according to the differences of the number of the insert pieces and the placement modes, the working life of the original resin grinding wheel is prolonged through the additionally-arranged brazed diamond insert pieces; and the quality of the grinding surface is improved, and in the aspect of comprehensive effectiveness, environment pollution is reduced.

Description

technical field [0001] The invention belongs to the field of steel grinding, and specifically refers to a brazing diamond insert resin corundum composite grinding wheel and a manufacturing process thereof. Background technique [0002] With the continuous construction and operation of railway traffic, the laid railway rails gradually appear damage phenomena such as pitting pits and micro cracks during long-term work. In response to such problems, maintenance grinding of rails is an effective means to prolong their service life. Grinding wheels for rail grinding are necessary tools for grinding work. Most of the existing rail grinding wheels are made of resin plus corundum abrasives. As a superhard abrasive, diamond has high hardness, regular shape, and high sharpness. With the increasing output of synthetic diamond in recent years, more and more fields are applied to diamond tools. [0003] The resin-bonded rail grinding wheel currently in use has a certain degree of tou...

Claims

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Application Information

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IPC IPC(8): B24D7/14B24D18/00
CPCB24D7/14B24D18/0009B24D18/009
Inventor 肖冰吴恒恒肖皓中肖博
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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