Method for manufacturing man-made polycrystalline diamond nozzle
A polycrystalline diamond and manufacturing method technology, applied in the direction of manufacturing tools, spray guns, metal processing equipment, etc., can solve the problems of short service life of nozzles, large nozzle core wear, large nozzle wear, etc., and achieve high price, simple installation, small size effect
Inactive Publication Date: 2009-11-18
JIANGSU POLYTECHNIC UNIVERSITY +1
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Problems solved by technology
However, the high-speed flowing water and fine sand will wear the nozzle more
Therefore, the nozzle cores are obtained by punching artificial rubies or sapphires at present, and the existing gemstone nozzles have the following defects: 1. Because the friction force of water wears the nozzle cores relatively large, the service life of the nozzles is short
2. Ruby and sapphire are used in the processing of the nozzle core, which is difficult to process. Laser drilling is required, which is costly and poor in economic benefits.
Method used
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Experimental program
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Embodiment Construction
[0014] Install the PCD nozzle core directly on the nozzle head of the existing high-speed water jet processing equipment, and use the hexagonal boron nitride film to evenly coat the predetermined size of the wire, the film thickness is 1mm, and place it on the diamond The center of the mixed material with metal Co powder is put together in a mold that can meet the size of the existing gemstone nozzle core, and then the PCD is synthesized at a high temperature of 1350-1550°C and a high pressure of 5.5-6.5GPa, and then the wire is pulled out , to realize the pre-forming of the nozzle core, after simple processing, grinding, deburring, trimming and smoothing, PCD nozzles with a diameter of 0.10-1mm can be produced, which can replace the existing gemstone nozzles and meet the existing water jet processing needs.
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Abstract
The invention discloses a method for manufacturing a man-made polycrystalline diamond nozzle. The method comprises the following steps of: evenly coating a hexagonal boron nitride film on a metal wire with a preset size, and making the coating film thickness be 1 mm; putting the coated metal wire in the center of a mixture of a diamond and metal Co micro powder, and then putting the metal wire and the mixture into a mould with the nozzle core size of a gem nozzle together; synthesizing a man-made polycrystalline diamond at a temperature of between 1,350 and 1,550 DEG C and under a pressure of between 5.5 and 6.5 GPa; and drawing out the metal wire, and carrying out processing, burnishing, deburring, finishing and grinding by a conventional method to obtain the man-made polycrystalline diamond nozzle with the diameter between 0.10 and 1 mm. The method has the advantages of simple processing process and long service life of the man-made polycrystalline diamond nozzle, and can realize diversification of inner bore shapes of nozzles.
Description
technical field [0001] The invention relates to a high-speed water jet processing equipment, in particular to its polycrystalline diamond (PCD) nozzle. Background technique [0002] High-speed water jet processing equipment can process and cut a variety of materials. During processing, it relies on supersonic water, that is, the combined action of nozzles, fine sand and sand tubes to generate large cutting forces to cut materials. However, the high-speed flowing water and fine sand will wear the nozzle more. Therefore present nozzle core all uses artificial ruby or sapphire to obtain through perforating, and existing jewel nozzle has following defect: 1, because the friction force of water wears and teares relatively big to nozzle nozzle core, so nozzle service life is short. 2. Ruby and sapphire are used in the processing of the nozzle core, which is difficult to process, and lasers are used for drilling, which is costly and poor in economic benefits. Contents of the i...
Claims
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IPC IPC(8): B24C5/04
Inventor 曹大呼陈功李海王芝秀陆刚
Owner JIANGSU POLYTECHNIC UNIVERSITY