Horizontal type vacuum furnace for diamond particle brazing

Abstract

The invention relates to a vacuum furnace, in particular to a horizontal type vacuum furnace for diamond particle brazing. A structure of a round horizontal type vacuum shell is adopted, a furnace door is arranged on one side, an inner-outer dual-layer design structure is adopted, water is led into the position between the two layers to achieve cooling, and a heating chamber is of a cylindrical structure and is installed in the vacuum shell; a structure of a graphite-pipe-shaped heater is adopted, upper-lower two-zone heating is adopted, the front end and the back end are provided with temperature compensation structures, a cylindrical hard carbon felt is made of thermal insulation materials at a time to serve as an inner container, and the cylindrical hard carbon felt is wrapped with a soft carbon felt; door screens of same structures are arranged at the two ends of the cylindrical heating chamber, meanwhile, four air openings are arranged, and insulation structures for preventing temperature losses are arranged at the portions of the air openings; a furnace door side door screen is installed on the furnace door, the heating chamber is opened or closed along with opening and closing of the furnace door, an air cooling system is of an internal circulation cooling structure, and a forced air cooling motor is of a frequency conversion structure and placed at the back end of a furnace body; and a high-pressure impeller is assembled on the forced air cooling motor, air is blown into the heating chamber through furnace door side door screen openings, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a vacuum furnace, in particular to a horizontal vacuum furnace for brazing diamond particles. Background technique [0002] Diamond has unique material properties such as high hardness and good wear resistance, and can be widely used in cutting, grinding, drilling and other fields. With the maturity of synthetic diamond manufacturing technology, the application fields are also wider. It exists in the form of small particles. When manufacturing tools such as wire saw beads, cutting blades, geological drilling bits, etc., it is necessary to weld the small particles of diamond to the substrate through the brazing filler metal in a high temperature environment, so as to complete the manufacture of related tools. Brazing in the environment needs to consider not only the controllability of temperature, but also how to quickly discharge harmful gases, and at the same time to take into account multiple mutually restrictive links such a...

AI Technical Summary

Problems solved by technology

[0002] Diamond has unique material characteristics such as high hardness and good wear resistance, and can be widely used in cutting, grinding, drilling and other fields. With the maturity of artificial diamond manufacturing technology, the application field is also more extensive. It exists in the form of small particles. When manufacturing tools such as wire saw beads, cutting blades, geological drilling bits, etc., it is necessary to weld small particle-loaded diamonds to the substrate through brazing filler metal in a high-temperature environment to complete the manufacturing of related tools. High temperature Brazing in the environment needs to consider not only the controllable temperature, but also how to quickly discharge harmful gases. At the same time, it must take into account multiple mutually restrictive links such as product consistency and production efficiency. In the diamond tool manufacturing process, brazing The technical upgrading of process equipment directly affects the quality of the final product. The horizontal vacuum furnace for diamond particle brazing is the key process equipment for diamond tool manufacturing. Common atmosphere protection brazing equipment has products that are prone to oxidation, poor temperature uniformity, and heat loss. Serious, uneven welding, uneven cooling, low efficiency and many other shortcomings

Images