Preparation and trimming method of laser near-net forming structured diamond excircle grinding wheel

Abstract

The invention discloses a preparation and trimming method of a laser near-net forming structured diamond excircle grinding wheel. The preparation and trimming method comprises the following steps thatdiamond and metal bonding agent powder are mixed in a material mixing bottle according to a certain mass fraction ratio, are subjected to ball grinding, are screened by a screening mesh, and are putinto a drying box for drying; a segment with a bright and clean to-be-machined metal matrix is obtained; diamond grinding material mixed powder obtained after drying is added into a powder feeding device; the segment with the bright and clean to-be-machined metal matrix is subjected to laser near-neat forming machining of a diamond grinding tool according to certain laser technology parameters andscanning paths, and the obtained segment is reinstalled in the excircle grinding wheel; the excircle grinding wheel is subjected to sharpening treatment; and the excircle grinding wheel after the sharpening treatment is trimmed by combination of a steel block and an oilstone. The machining time is saved, the machining cost is reduced, a required grinding wheel structure can be flexibly machined out, relative distribution positions of diamond grinding particles are effectively controlled, the flowability of cutting scraps is improved, cutting force is reduced, and the cutting temperature is lowered.

Description

technical field [0001] The invention belongs to the technical field of superhard abrasive processing, and in particular relates to a method for preparing and dressing a laser near-net-shaped structured diamond outer circle grinding wheel. Background technique [0002] With the development of modern processing technology towards high speed, high efficiency, precision and automation, and the emergence of some new difficult-to-machine materials, ordinary abrasives such as silicon carbide and corundum can no longer fully meet the requirements of modern grinding. Diamond and other superabrasives are more and more widely used in modern processing and manufacturing industries due to their ultra-high hardness and adaptability to difficult-to-machine materials. [0003] The diamond grinding wheels currently used in production are generally made by multi-layer sintering or single-layer electroplating process. The abrasive grains are only mechanically embedded and embedded in the bondi...

AI Technical Summary

Problems solved by technology

However, for laser surface structured processing, material reduction is performed after the forming grinding wheel is produced, which is inefficient and causes a certain degree of waste

[0006] In addition, vacuum high-temperature brazing and high-frequency induction brazing for the production of new superhard abrasives have a higher protruding height of abrasive grains, stronger holding force, lower grinding temperature, and smaller cutting force, but the two superhard abrasives The abrasive manufacturing process also has many deficiencies, the production cycle is long, the substrate is prone to thermal deformation, and the production cost is high

For the laser brazing processing method of powder coating, the thickness uniformity cannot be guaranteed. Too thick powder coating will easily cause the solder and the substrate to not be tightly bonded. Too thin powder coating cannot guarantee the integrity of the solder under the premise of the existing process.

For the powder-spraying laser brazing processing method, the combination of abrasive particles and solder is not firm, the processed abrasive tool falls off seriously during the grinding process, and the processed surface is too undulating, which cannot meet the working requirements of the abrasive tool

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