Hydraulic needle plate and its manufacture process

Abstract

The present invention is hydraulic needle plate and its manufacture process. The hydraulic needle plate is manufactured with bronze and through machining and ageing treatment, or with pure titanium and through machining and surface nitridation treatment. The hydraulic needle plate has high surface hardness, long service life, good machining performance and low manufacture cost.

Description

Technical field: [0001] The invention relates to a needle plate for non-woven fabric manufacturing equipment and a manufacturing process thereof. Background technique: [0002] The non-woven fabric manufacturing equipment uses a densely covered and powerful water-spraying water needle plate. During use, it is often necessary to replace a new water-jet plate due to water spray erosion. The existing water jet plate is a long thin strip plate with a length of 1 to 10 meters, a width of about 25.4 millimeters, and a thickness of 0.3 to 1.8 millimeters, on which one or more rows of small water spray holes are evenly distributed. Two adjacent rows of small water spray holes are arranged in a misplaced position with a distance of 0.4 to 1.6 mm. The small water spray holes are centrally perforated and the upper end has a tapered reaming section with a taper of 30° to 90°. The diameter of the central perforated hole is Φ0. 10-0.13 mm, the depth of the central perforation is 0.2-0.5 ...

AI Technical Summary

Problems solved by technology

The hardness of the material is about HV200, which is relatively low. During use, the water spray holes of the jet plate are easily scratched by abrasion, resulting in large deformation of the water spray holes, which eventually leads to early failure of the jet plate and affects its service life.

In addition, during the manufacturing process of the stainless steel jet plate, the following processing failures often occur: because of the high deformation resistance of the material, when punching the conical dimple of the conical reaming section, the tip of the punch often breaks in the dimple , it is necessary to dig out the broken tip of the punch from the pit, and grind the raised part on the back of the plate due to stamping, which is time-consuming and labor-intensive, and increases the manufacturing cost

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