Collet of gem nozzle for ultrahigh-pressure water cutting

Abstract

The invention discloses a collet of a gem nozzle for ultrahigh-pressure water cutting and belongs to the field of the manufacturing of water cutting machines. The collet comprises an inlet runner (1), a gem insert hole (2), an outlet runner A (3) and an outlet runner B (4), a special contour (5), a normal contour (6) and a colllet body (8), wherein the inlet runner (1) is decrementally conic and has a cone angle of 15 to 30 DEG; the cylindrical gem insert hole (2) is at the downstream of the inlet runner (1); the outlet runners are below the gem insert hole (2) and consist of the cylindrical outlet runner A (3) and the decrementally conic outlet runner B (4); the special contour (5) is provided with a cylindrical step with the height of 1 to 1.5mm; and the outlet end face (7) of the outlet runner B (4) has a wall thickness of 0.2 to 0.5mm and adopts edge cutting processing. The collet enhances the spout concentration of water jet during water cutting and increases cutting efficiency.

Description

technical field [0001] The invention relates to a jewel seat of a jewel nozzle for ultra-high pressure water cutting, which belongs to the technical field of water cutting machine manufacturing. Background technique [0002] In the process of ultra-high pressure water cutting, the clustering of water jets is generally poor, and the diffusion speed of jet water beams is very fast, which mainly brings about two problems. One is that when pure water is used as the medium for cutting, pure water The target distance of the cutting head needs to be controlled within a small range; secondly, in abrasive waterjet cutting, the abrasive mixing efficiency in the abrasive waterjet cutting head is low, the amount of abrasive deposition in the mixing chamber is large, and the wear of the mixing tube is very serious. The nozzle is the key equipment that affects the quality of the jet and thus the cutting efficiency. In order to enhance the clustering of the water jet, the usual practice is...

AI Technical Summary

Problems solved by technology

However, in the actual manufacturing process of the nozzle, it is very difficult to process a good streamline shape on the small-sized gem nozzle hole (the diameter of the nozzle hole is between 0.1 and 0.4 mm). Even if it is possible, the processing cost It is relatively expensive and it is difficult to ensure the integrity of the gemstone hole wall and other parts. Moreover, gemstones are one of the most wearable parts in water cutting and are frequently replaced. Therefore, it is not economical to modify the gemstone nozzle holes. Similar schemes are rarely adopted in the waterjet machine industry, and the most widely used nozzle hole shape is still the most common cylindrical shape.

The gemstone is embedded on the gemstone seat, and the structure of the gemstone seat also has a great influence on the characteristics of the jet. The structure of the gemstone seat commonly used at present is very simple, and its function is simply as a carrier of the gemstone, and its structure has an impact on the quality of the jet. seldom received attention

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