The present disclosure provides methods of making a vitreous bond abrasive article and a metal bond abrasive article. An abrasive article preform is produced by an additive manufacturing sub-process comprising the deposition of a layer of loose powder particles in a confined region and selective heating via conduction or irradiation to heat treat an area of the layer of loose powder particles. The loose powder particles include abrasive particles and organic compound particles, as well as vitreous bond precursor particles or metal particles. The abrasive article preform produced by additive manufacturing is subsequently heated to provide the vitreous bond abrasive article comprising the abrasive particles retained in a vitreous bond material, or to provide the metal bond abrasive article. Also, the methods include receiving, by an additive manufacturing device having a processor, a digital object specifying data for an abrasive article, and generating the abrasive article with the manufacturing device.

The present disclosure provides methods of making a vitreous bond abrasive article and a metal bond abrasive article. The methods include sequential steps. Step a) includes a subprocess including sequentially: i) depositing a layer of loose powder particles in a confined region; and ii) selectively applying heat via conduction or irradiation, to heat treat an area of the layer of loose powder particles. The loose powder particles include abrasive particles and organic compound particles, as well as vitreous bond precursor particles or metal particles. The layer of loose powder particles has substantially uniform thickness. Step b) includes independently carrying out step a) a number of times to generate an abrasive article preform comprising the bonded powder particles and remaining loose powder particles. Step c) includes separating remaining loose powder particles from the abrasive article preform. Step d) includes heating the abrasive article preform to provide the vitreous bond abrasive article comprising the abrasive particles retained in a vitreous bond material, or to provide the metal bond abrasive article. A method of making a metal bond abrasive optionally includes infusing an abrasive article preform with a molten lower melting metal and solidifying the molten lower melting metal to provide the metal bond abrasive article. The present disclosure further provides a vitreous bond abrasive article precursor and a metal bond abrasive article precursor.

The present disclosure provides methods of making a vitreous bond abrasive article and a metal bond abrasive article. The methods include sequential steps. Step a) includes a subprocess including sequentially: i) depositing a layer of loose powder particles in a confined region; and ii) selectively applying heat via conduction or irradiation, to heat treat an area of the layer of loose powder particles. The loose powder particles include abrasive particles and organic compound particles, as well as vitreous bond precursor particles or metal particles. The layer of loose powder particles has substantially uniform thickness. Step b) includes independently carrying out step a) a number of times to generate an abrasive article preform comprising the bonded powder particles and remaining loose powder particles. Step c) includes separating remaining loose powder particles from the abrasive article preform. Step d) includes heating the abrasive article preform to provide the vitreous bond abrasive article comprising the abrasive particles retained in a vitreous bond material, or to provide the metal bond abrasive article. A method of making a metal bond abrasive optionally includes infusing an abrasive article preform with a molten lower melting metal and solidifying the molten lower melting metal to provide the metal bond abrasive article. The present disclosure further provides a vitreous bond abrasive article precursor and a metal bond abrasive article precursor.

Diamond grinding wheel, for grinding and abrasion of stratified solid materials including a cutting unit provided with a diamond crown and: a central tooth adapted to remove plastic material or similar materials, present on a sheet; holes adapted for cooling; cuts, based on the glass sheets and on the plastic material to be processed; external flange. The device is adapted to increase the quality of the sheets being processed once the grinding has terminated, rendering them polishable, lacking plastic material residues on the glasses; the dimensions of the device varying from a diameter and a height included between 30 mm and 400 mm; the grinding wheel including a base flange, and an external flange made of iron, aluminum and/or resin adapted to ensure a rigid structure for the entire device.

Diamond grinding wheel, for grinding and abrasion of stratified solid materials including a cutting unit provided with a diamond crown and: a central tooth adapted to remove plastic material or similar materials, present on a sheet; holes adapted for cooling; cuts, based on the glass sheets and on the plastic material to be processed; external flange. The device is adapted to increase the quality of the sheets being processed once the grinding has terminated, rendering them polishable, lacking plastic material residues on the glasses; the dimensions of the device varying from a diameter and a height included between 30 mm and 400 mm; the grinding wheel including a base flange, and an external flange made of iron, aluminum and/or resin adapted to ensure a rigid structure for the entire device.

This disclosure relates to a rotary abrasive machining tool comprising a hub with a plurality of axially extending radial slots in an outer circumference thereof, and a plurality of abrasive segments, typically polycrystalline diamond, located in the radial slots.

A machining toolholder including a body, a horn and a piezoelectric actuator is disclosed. The body includes a center through hole extending in the axial direction therein. The center through hole includes a first hole section and a second hole section. The horn includes a first section and a second section which are disposed coaxially and connected with each other. Part of the first section is slidably inserted into the first hole section. The second section is connected to the body and engaged with a tool. Part of the surface of the second section contacts with a wall surface of the second hole section. The piezoelectric actuator fits around the horn and is controllable to drive the tool to vibrate. With this design, the machining toolholder could have good stiffness and connection stability, and could resist to the stress effectively.

A coolant flow guide for grinder includes a base including a tilted bottom wall having a predetermined tilt angle, a peripheral wall disposed around the tilted bottom wall and defining with the tilted bottom wall a diversion channel having a top opening and a partition wall located on the tilted bottom wall to divide the diversion channel into two flow passages that slope downwardly to the diversion port, and a workpiece positioning unit mounted on the base above the flow passages for holding a workpiece. Thus, when the grinder is operated to grind the workpiece, the debris thus produced is carried by the applied coolant to flow through the flow passages to the outside of the base via the diversion port.

A coolant flow guide for grinder includes a base including a tilted bottom wall having a predetermined tilt angle, a peripheral wall disposed around the tilted bottom wall and defining with the tilted bottom wall a diversion channel having a top opening and a partition wall located on the tilted bottom wall to divide the diversion channel into two flow passages that slope downwardly to the diversion port, and a workpiece positioning unit mounted on the base above the flow passages for holding a workpiece. Thus, when the grinder is operated to grind the workpiece, the debris thus produced is carried by the applied coolant to flow through the flow passages to the outside of the base via the diversion port.

Carrier body (1) for a grinding or a cutting tool (2), comprising a central coupling area (3) for connecting the grinding or cutting tool (2) to a rotary drive for rotating the grinding or cutting tool (2) about an axis of rotation (4) passing through the coupling area (3), a carrier structure (6) adjacent thereto in the radial direction (5), wherein the carrier structure (6) has recesses (7, 8) separate from the coupling area (3), and two substantially annular side surfaces (9, 10) which are spaced apart from each other in the axial direction (11) across the carrier structure (6), wherein at least some, preferably all, of the recesses (7, 8) are open only to one of the side surfaces (9, 10) of the carrier body (1).