As the working time of the diamond grinding wheel increases, it is inevitable that the grinding wheel will have some corresponding problems. This article mainly talks about the dressing tips of diamond grinding wheels.
The working layer of grinding wheel:
The grinding wheel is an important grinding tool. The effectiveness of grinding in processing is determined by the inherent characteristics of the abrasive and the physical and chemical properties of the processed material.
As the grinding wheel's abrasive grains grow blunt, cutting blocks the hole, causing the diamond grinding wheel to lose its cutting and grinding power.
Methods for dress diamond grinding wheels:
As the grinding wheel's abrasive grains grow blunt, cutting blocks the hole, causing the diamond grinding wheel to lose its cutting and grinding power.
Methods for dress diamond grinding wheels:
1. Diamond grinding wheel dressing pen
A diamond dressing pen is a tool that is widely used for dressing grinding wheels. The diamond trimming pen's construction is mostly made up of diamond and the handle body. The working layer is called the "nib," which is the working part of the diamond trimming pen. The raw material is a natural diamond or artificial diamond.
Diamond dressing pens are available in chain, layer, row, powder, and other options. During the dressing process, an appropriate diamond pen must be selected based on the position of the diamond grinding wheel particles, the size of the particles in the diamond dressing pen, and their distribution in the pen. When in use, the pen's tip is tilted at an angle to grind against the grinding wheel. The alloy with strong bonding force is used as the bonding agent in the diamond dressing pen, which can rebond the particles on the diamond grinding wheel to achieve the purpose of grinding.
Diamond dressing pens are available in chain, layer, row, powder, and other options. During the dressing process, an appropriate diamond pen must be selected based on the position of the diamond grinding wheel particles, the size of the particles in the diamond dressing pen, and their distribution in the pen. When in use, the pen's tip is tilted at an angle to grind against the grinding wheel. The alloy with strong bonding force is used as the bonding agent in the diamond dressing pen, which can rebond the particles on the diamond grinding wheel to achieve the purpose of grinding.
2. Rolling wheel dressing wheel
Diamond dressing roller, diamond profile dressing rollers, diamond form dressing rollers, diamond rotary dresser. The diamond types are mainly natural diamond, synthetic diamond, CVD diamond.The rolling wheel is made of cement carbide, abrasives, etc. During the rotation process of the rolling wheel, some uneven abrasive grains on the surface of the diamond grinding wheel can be crushed or dropped off, so that the diamond grinding wheel can maintain the cutting performance, and the dressing operation is relatively simple.
3. Grinding and shaping method
The common abrasive grinding wheel and the diamond grinding wheel are used to grind each other, the diamond grinding wheel makes a rotating motion, while the ordinary abrasive grinding wheel also makes a feed motion while doing a rotating motion.While rotating, it produces a certain extrusion force on the metal bond, so that cracks appear in the bond. The continuous effect of friction causes the cracks of the bond to further expand, and finally the bond is broken, so that the blunt diamond particles fall off from the surface of the grinding wheel, and the sharp diamond particles are exposed to achieve the purpose of dressing.
This method has the advantages of simple structure, convenient operation, short dressing time, stable grinding speed, and low grinding cost, but there is impact force in the dressing process, low dressing efficiency, poor dressing accuracy, more abrasive particles falling off, and difficult to control the shaping quality. Therefore, this method is mostly used for dressing ceramic and resin bonded diamond grinding wheels.
4.Soft elastic trimming method
The abrasive belt is positioned on the abrasive belt wheel when dressing. During the dressing, the diamond grinding wheel rotates at a high speed, the take-up wheel rotates slowly, and the abrasive belt moves slowly on the belt wheel. The contact force between the abrasive belt and the grinding wheel is used to effectively remove the diamond grinding wheel. The contact force between the abrasive belt and the grinding wheel is used to effectively remove the bond between the abrasive grains on the surface of the diamond grinding wheel, so as to achieve the purpose of dressing.Compared with other dressing methods, the soft elastic dressing method is more suitable for dressing metal-bonded diamond grinding wheels, because metal-bonded diamond grinding wheels have both metal plasticity and high hardness, so dressing is quite difficult.
The abrasive grains on the surface of the dressing tool of other dressing methods are quickly worn away, and the chip space of the dressing tool is easily blocked so that the dressing cannot continue. And the chip space is easy to block so that the trimming cannot continue. The abrasive belt is always contacted by the dressing wheel with new sharp abrasive grains, which can form a good dressing environment, effectively remove the bond between the abrasive grains on the surface of the diamond grinding wheel, and the grinding force is small during dressing, and the grinding surface quality is high.
