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Method for cyclic online grinding and dressing ceramic binding agent cubic boron nitride (CBN) grinding wheel

A ceramic bonding agent and bonding agent technology, which is applied to the parts of grinding machine tools, grinding/polishing equipment, grinding/polishing safety devices, etc. Good consistency, high trimming efficiency and low consumption

Pending Publication Date: 2019-12-17
沈阳中科超硬磨具磨削研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to reduce the ineffective processing time, improve the grinding accuracy, and provide an online dressing method for circular grinding of CBN grinding wheels, so as to solve the problem that the dressing process of the grinding wheel is cumbersome and can not be realized online

Method used

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  • Method for cyclic online grinding and dressing ceramic binding agent cubic boron nitride (CBN) grinding wheel
  • Method for cyclic online grinding and dressing ceramic binding agent cubic boron nitride (CBN) grinding wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The online dressing method of the CBN emery wheel of the present embodiment adopts the following steps:

[0025] (1) First, the high-speed steel workpiece is ground with a vitrified bond CBN grinding wheel. The specifications of the CBN grinding wheel are shown in Table 1, and the specifications of the high-speed steel workpiece are shown in Table 2.

[0026] Table 1 Vitrified bond CBN grinding wheel

[0027] CBN granularity CBN concentration (vol%) Grinding contact area Grinding wheel abrasive layer thickness Number of grinding wheels 100 / 120 75 35.6mm 2

3mm 5

[0028] Table 2 Specification parameters of high-speed steel

[0029] steel number Hardness (HRC) Bending strength (GPa) Impact toughness (MJm 2 )

Grinding effective area W18Cr4V 65 3.8 0.3 20

[0030] (2) When the CBN grinding wheel grinds the workpiece, the linear speed of the grinding wheel, the linear speed of the workpiece, and the fee...

Embodiment 2

[0046] The present embodiment is the same as the method of embodiment 1, only the following parameters are adjusted:

[0047] The dressing abrasive is corundum;

[0048] The grinding contact area of ​​the CBN grinding wheel is 100mm2, and the thickness of the abrasive layer of the grinding wheel is 6mm.

[0049] The abrasive particle size of the CBN grinding wheel is 80#, and the particle size of the dressing abrasive is 150#.

[0050] The linear speed of the CBN grinding wheel is 40m / s, the linear speed of the dresser is 5m / s, and the feed speed of the workpiece is 0.2mm / min.

Embodiment 3

[0052]The present embodiment is the same as the method of embodiment 1, only the following parameters are adjusted:

[0053] The dressing abrasive is 50% (volume ratio) of corundum and silicon carbide;

[0054] The grinding contact area of ​​the CBN grinding wheel is 10mm2, and the thickness of the abrasive layer of the grinding wheel is 1mm.

[0055] The abrasive particle size of the CBN grinding wheel is 220#, and the particle size of the dressing abrasive is 600#.

[0056] The linear speed of the CBN grinding wheel is 30m / s, the linear speed of the dresser is 1m / s, and the feed speed of the workpiece is 0.6mm / min.

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Abstract

The invention discloses a method for cyclic online grinding and dressing a ceramic binding agent cubic boron nitride (CBN) grinding wheel. A bidirectional motor is arranged on a rotary disk. CBN grinding wheels are fixed to two ends of the bidirectional motor. A workpiece is machined by the CBN grinding wheel at one end, and the CBN grinding wheel at the other end is dressed. When the machining-used grinding wheel needs to be dressed, the rotary disk is rotated, and the CBN grinding wheel for machining and the dressed CBN grinding wheel are swapped. The method for dressing the grinding wheel comprises the steps that a dressing abrasive is mixed with a cooling liquid introduced to a ground position; the dressing abrasive can be well embedded into a binding agent of the CBN grinding wheel under the driving function of the external radial grinding pressure and the cooling liquid so that the binding agent is crushed, and ground-flush CBN abrasive particles come off; and online dressing ofthe CBN grinding wheel is achieved. By means of the method for cyclic online grinding and dressing the ceramic binding agent CBN grinding wheel, online dressing of the ceramic binding agent CBN grinding wheel can be well achieved; dressing efficiency is high, consumption is little; consistency of the protrusion height after dressing is good, and dressing is uniform; and the method is capable of cyclic online grinding and dressing.

Description

technical field [0001] The invention relates to a method for dressing a grinding wheel, in particular to a method for circular grinding and online dressing of a CBN grinding wheel, belonging to the field of precision machining. Background technique [0002] CBN grinding wheels have excellent grinding performance and are widely used in the field of processing difficult-to-machine materials. [0003] When the CBN grinding wheel processes the workpiece on the CNC grinding machine, the shape of the workpiece depends on the shape of the grinding wheel. After the grinding wheel is used for a period of time, the abrasive grains will gradually become blunt and not sharp, and different degrees of wear will occur in the grinding state, resulting in the workpiece being ground. The effective dressing of the grinding wheel is the premise to ensure high-quality processing. The shape of the grinding wheel should be trimmed in time, otherwise it may cause a lot of errors in the workpiece, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B53/06B24B55/02B24B27/00
CPCB24B53/06B24B55/02B24B27/0076
Inventor 郑师光吕升东刘宏伟李涛张天罡
Owner 沈阳中科超硬磨具磨削研究所
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