Misting Lubricant may include the application of a liquid medium via a high-pressure mist nozzle instead of a conventional drip process. By utilizing misting lubricant, the lubricant may be evenly applied, and surface irregularities may be minimized, which may reduce or eliminate splashing. Misting lubricant may provide for a cleaner and more efficient material cutting process.

Misting Lubricant may include the application of a liquid medium via a high-pressure mist nozzle instead of a conventional drip process. By utilizing misting lubricant, the lubricant may be evenly applied, and surface irregularities may be minimized, which may reduce or eliminate splashing. Misting lubricant may provide for a cleaner and more efficient material cutting process.

Methods of forming a cutting element include leaching a diamond table of the cutting element and subsequent to leaching the diamond table of the cutting element, forming a chamfer on the diamond table of the cutting element at an interface between a cutting surface of the diamond table and an outer side surface of the diamond table. Methods of forming earth-boring tools include forming a cutting element and securing the cutting element to a body of the earth-boring tool. Forming the cutting element includes including leaching a diamond table of the cutting element and subsequent to leaching the diamond table of the cutting element, forming a chamfer on the diamond table of the cutting element at an interface between a cutting surface of the diamond table and an outer side surface of the diamond table.

Multiphase Cutting may comprise a bulk removal pass followed by a fine removal pass to cut a gemstone. For example, multiphase cutting may perform a removal by removing approximately 90% of material during a first pass and then reset and remove the remaining 10% of material during a second pass. The second pass may use a slower feed rate and a wider oscillation, moving the gemstone across an entire range of a lap wheel. This split setup may thus produce significantly more accurate results for the accuracy of the total removal.

A method for controlling the polishing of a gemstone includes: obtaining a three-dimensional model of the gemstone; fixing the gemstone in a dop, wherein an initial facet to be polished is aligned; obtaining at least one image of the initial facet; based on the obtained at least one image and the obtained three-dimensional model, determining at least first setting parameters for a first planned facet positioned between the initial facet and a desired final polished facet; setting the dop for obtaining a polished gemstone having a polished facet approaching the first planned facet; obtaining at least one image of the polished facet; based on the obtained at least one image of the polished facet and the three-dimensional model, determining at least further setting parameters for a further planned facet; setting the dop for obtaining a polished gemstone having a polished facet approaching the further planned facet.

The invention discloses a multi-set clamping fixture for diamond machining, which is used for machining diamonds. The clamping fixture includes a base shell, a lip ring, and a sealing ring. The upper end of the base shell is opened, the lip ring is arranged at the inner ring position of the base shell, an embedding groove is arranged at the inner ring position of the lip ring, the sealing ring is arranged in the embedding groove, a vacuum cavity is formed in the base shell, and the base shell is externally connected with a vacuum pumping pipeline. After the pavilion portion of a diamond to be machined is inserted into the lip ring and supported by the sealing ring, a vacuum cavity is formed in the base shell, the vacuum cavity is vacuumized by the external pipeline, and then the diamond is limited at the position of the lip ring to complete the clamping process. The lip ring is connected with the base shell in a detachable structure. An annular air pressure cavity is arranged on the outer edge of the upper portion of the base shell, one ends of a plurality of auxiliary clamping rods are located in the air pressure cavity, and one ends of the auxiliary clamping rods radially pass through the inner annular surface of the air pressure cavity and the lip ring to be in contact with the diamond. Shaft seals are arranged at the positions where the auxiliary clamping rods pass through the inner annular surface of the air pressure cavity, and the clamping fixture further includes a cavity cover that is mounted on the upper portion of the base shell and covers and wraps the air pressure cavity. The air pressure cavity is internally connected with an external pressure air source pipeline.

The feeding unit includes a base plate, and a cross member. The base plate receives the gemstones, affixed to the gemstone holders. The cross member is an automated moving member, configured such that a home position of the cross member coincides with a pre-defined point on the base plate. Accordingly, the gemstone, along with its gemstone holder, when received at the base plate is picked up by the cross member, specifically, by the first gripping member and the second gripping member, by a detachable contact established between the gemstone holder and the cross member, such that the cross member transfers the gemstone holder positioned on the base plate to a pre-defined position on the feeding unit.

The feeding unit includes a base plate, and a cross member. The base plate receives the gemstones, affixed to the gemstone holders. The cross member is an automated moving member, configured such that a home position of the cross member coincides with a pre-defined point on the base plate. Accordingly, the gemstone, along with its gemstone holder, when received at the base plate is picked up by the cross member, specifically, by the first gripping member and the second gripping member, by a detachable contact established between the gemstone holder and the cross member, such that the cross member transfers the gemstone holder positioned on the base plate to a pre-defined position on the feeding unit.

A gemstone machining center includes a set-up station adapted to deliver onwards loaded-dops each comprising a dop holder and a gemstone bonded to the dop holder, a bruting/cutting station for receiving loaded-dops from the set-up station, and at least one polishing station for receiving gemstones after being detached from their dop holders.

A gemstone machining center includes a set-up station adapted to deliver onwards loaded-dops each comprising a dop holder and a gemstone bonded to the dop holder, a bruting/cutting station for receiving loaded-dops from the set-up station, and at least one polishing station for receiving gemstones after being detached from their dop holders.