Reducing blasting weighting needle assembly

Abstract

The invention relates to a reducing blasting weighting needle assembly. According to the technical scheme, the reducing blasting weighting needle assembly comprises a needle sleeve with a pressure relief hole, a needle core, a return spring and a guiding cylinder, wherein a blocking shoulder is arranged at the rear end of the needle core and can be matched with a rear screw sleeve and a shaft shoulder to limit the needle core axially; a blasting device is fixedly arranged on the rear screw sleeve; an air cavity in the blasting device is communicated with an inner cavity of the needle sleeve and can be communicated with a high-pressure air source; and the diameter of the needle core is the same as the inner diameter of the rear screw sleeve. The reducing blasting weighting needle assembly can impact workpieces during the maximum kinetic energy, has a simple structure, and is low in manufacturing cost, reliable in performance and high in adaptability to the workpieces, marking depth reaches the domestic and international advanced level, and the marking depth and vibration frequency which can be adjusted continuously are the unique design of the reducing blasting weighting needle assembly.

Description

technical field [0001] The invention relates to a striker needle for marking, in particular to a variable-diameter explosive weighted needle assembly. Background technique [0002] What prior art mainly used is Canada Iswar floating needle, as attached figure 1 As shown, it mainly controls the on-off of the intake air through the valve body to achieve smooth needle return. However, the needle core does not have a variable acceleration process. When it hits the workpiece, it has already entered the deceleration process of the needle core, and the impact force is relatively small; it requires high machining accuracy for the valve plate, and under complex working conditions, it is often caused by the surface of water and oil. The tension problem causes the valve switch to fail. Therefore, the impact force of the existing floating needle is still relatively small, and the principle is backward, the manufacturing cost is high, and the failure rate is high. Contents of the inv...

AI Technical Summary

Problems solved by technology

However, the needle core does not have a variable acceleration process. When it hits the workpiece, it has already entered the deceleration process of the needle core, and the impact force is relatively small; it requires high machining accuracy for the valve plate, and under complex working conditions, it is often caused by the surface of water and oil. The tension problem causes the valve switch to fail

Therefore, the impact force of the existing floating needle is still relatively small, and the principle is backward, the manufacturing cost is high, and the failure rate is high.

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