Dental Tools Brazing

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Zirconia ceramics have good biocompatibility, corrosion resistance and wear resistance, excellent chemical stability and unique aesthetics, and have become an important material for oral restoration. When grinding and cutting the zirconia pre-set ceramic block to form the bottom crown or stent of all-ceramic crowns and bridges, tools with higher cutting or grinding efficiency are required. At present, electroplated diamond dental tools are more commonly used. In recent years, diamond tools prepared by brazing have a higher diamond edge and stronger bonding force than diamond tools prepared by electroplating, and there is no environmental pollution.

1. Dental Tools Brazing

(1) When using brazed diamond tools with grain sizes of 251 μm and 107 μm to process zirconia ceramics, the normal grinding force increases with the increase of the feed speed. When the feed speed is 15~45 mm/min.The tangential grinding force does not change much with the increase of the feed rate, and then increases significantly. When the brazed diamond tool with a grain size of 107 μm is processed, the normal and tangential grinding forces are both smaller than those of the brazed diamond tool with a grain size of 251 μm.

(2) When brazed diamond tools with particle sizes of 251 μm and 107 μm are used to process zirconia ceramics, brazed diamond tools with a particle size of 107 μm are normally ground when the spindle speed is 12 000 to 14 000 r/min. The force increases more, but then the normal grinding force is basically unchanged. The normal grinding force of brazed diamond tools with a particle size of 251μm increases with the increase of spindle speed, and the normal grinding force is greater than that of a brazed diamond tool with a particle size of 107μm.

(3) The surface roughness value of zirconia ceramics increases with the increase of the feed speed. When the feed speed is low, there are obvious diamond grinding marks on the surface; when the feed speed is high, there are obvious brittle fractures and crushing fractures. The surface roughness value of zirconia ceramics decreases with the increase of the spindle speed. The surface wear marks are clearer when the speed is low, and the surface wear marks become shallower when the speed is high, and there are traces of microplastic deformation.

(4) With the increase of the feed rate, the shape of zirconia chips has a tendency to change from fine and small powder to large and long strips. As the spindle speed increases, the chips tend to be thinner.

2. Dental Tools Vacuum Brazing Furnace

Main technical parameters(Model: RVB-0204)

Parameter	Dimensions：about D2100/W1600/H1800mm
	Equipment weight：1600Kg
	Equipment power：28Kw
	Voltage:380V
	Frequency:50HZ
Heating	Heating power:25KW
	Max temperature: 1300 ℃
	Working temperature: ≤1200 ℃
	Working area size: Φ200 * H400 mm
	Heating chamber structure: Vertical, bottom lift feed in and out
	Heater material structure: Molybdenum sheet, annulus
thermal insulation	Insulator Material: Molybdenum sheet
	Characteristic: Good ventilation, high cleanliness, quick heating
Gas atmosphere	Nitrogen, argon and a small amount of hydrogen
	Inflation pressure: ≤0.02MPa
	Flow gauge: Float flowmeter Range Optional
	Also equipped with pressure sensors, solenoid valves and other accessories.
Control	Control Center: 10-inch LCD touch screen MCGS
	Temperature control instrument: AI-518P
	Thermometric element: OMEGA Imported N type thermocouple
	Thermometric: OMEGA Imported N type thermocouple safety interlooking
	Main electrical parts: Schneider or OMRON or ABB etc
	Other accessories: Ammeter, voltmeter, power regulator,transformer
Cooling	The furnace body is double-layer water cooled structure, the waterway is composed of various pipeline valves, the branch uses black rubber water pipe, and the stainless steel joint. Connected to the furnace body, furnace cover, furnace bottom, water-cooled electrode, molecular pump and other areas. Also equipped with electric contact pressure gauge and the waterway manual valve
Safety	Ultra-light sound and light alarm and power off
	Equipment bottom support: Foma wheel, can be removed or fixed

Shanghai Geheng Vacuum Technology Co., Ltd. is a vacuum heat treatment furnace manufacturer with many years of experience in design, manufacturing and production. Mainly produce vacuum heat treatment furnace, vacuum sintering furnace, vacuum brazing furnace, New Energy And Environmental Protection Equipment and other vacuum equipments.Provide customized services, equipment work area can be based on customer output.