Extruding and grinding device for spray orifice of oil spray nozzle and extruding and grinding method for spray orifice of oil spray nozzle

Abstract

The invention provides an extruding and grinding device for a spray orifice of an oil spray nozzle and an extruding and grinding method for the spray orifice of the oil spray nozzle, belonging to the technical field of the precision machining of the spray orifice of the oil spray nozzle. The extruding and grinding device for the spray orifice of the oil spray nozzle provided by the invention comprises a grinding material filling pipeline, a grinding material processing pipeline, a grinding material emptying pipeline, a grinding material temperature control pipeline and an emergency emptying pipeline, wherein a detecting device is arranged on the grinding material processing pipeline for detecting the real-time grinding material flow of the spray orifice of the oil spray nozzle. The extruding and grinding method for the spray orifice of the oil spray nozzle provided by the invention mainly comprises the following steps of: grinding-detecting and comparing flow-grinding-detecting and comparing flow. The spray orifice of the oil spray nozzle is machined by means of extruding and grinding by a step-by-step approach method. According to the method, the real-time grinding material flow of the spray orifice is accurately detected and is compared step by step till the flow value reaches a set value, so that the grinding processing can be guaranteed to achieve the technological requirement. According to the invention, the filleted corner of the orifice, which accords with the technological requirement, can be formed, so that the fineness of the wall of the spray orifice can be improved, the flow coefficient of the oil spray nozzle can be improved, and the device is simple in structure and convenient to maintain.

Description

technical field [0001] The invention relates to the technical field of precision machining, in particular to the precision machining of tiny holes in parts, in particular to a squeeze grinding device for a nozzle hole of a fuel injection nozzle for a diesel engine and a flow control method for the nozzle hole. Background technique [0002] The fuel injector is one of the important components in the fuel system of a diesel engine. With the improvement of national emission requirements and the application of high-pressure common rail technology, the fuel injector is also developing in the direction of the number of holes and small aperture, and its processing quality directly affects the fuel injector. The atomization characteristics, oil line penetration and flow coefficient of the diesel engine will ultimately affect the economy, power and emission indicators of the diesel engine. Among them, the nozzle flow coefficient is an important index for evaluating the quality of the ...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are as follows: the hydraulic oil for driving and the slurry for grinding are stored in a high-pressure material tank at the same time. In order to separate the two, the high-pressure material tank adopts a special structure. The system pressure is difficult to stabilize, and it is difficult to meet the requirements of high-precision flow measurement; on the other hand, this method involves a complex hydraulic system, and various pumps and valves have high requirements for hydraulic oil, resulting in high maintenance costs and high failure rates of the system

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