Cathode structure and electrolytic machining method for diesel engine fuel injection body

Abstract

The invention discloses a cathode structure for a diesel engine fuel injection body and an electrolytic machining method. An electrolytic cathode comprises a cathode body, a step structure protrudingout of the cathode body, and intersecting structures protruding out of the end face of the step structure. The diameter of the cathode structure is increased through the step structure, machining gapsbetween sharp edges and burrs on the intersecting positions of the cathode and cross holes and the cathode are reduced, and therefore the sharp edges and the burrs can be effectively removed. The intersecting structures arranged at the front end and the rear end of the step structure can form more uniform electric fields in second channels at the intersecting positions of the cross holes in the electrolytic machining process. Therefore, the intersecting lines of the cross holes can be removed through the uniformly-distributed electric fields, and transition arcs obtained through electrolyticmachining are smoother. Accordingly, the fuel injection body machined in the manner can relieve abrasion of parts such as a plunger, an oil outlet valve and a needle valve in a diesel engine oil supply system, and power output of a diesel engine is stabilized.

Description

technical field [0001] The invention relates to the technical field of processing engine parts, in particular to a cathode structure and an electrolytic processing method for a fuel injection body of a diesel engine. Background technique [0002] Diesel engine is the core power component in the process of agricultural mechanization. The fuel injection body is a key connector in the engine fuel supply system, which forms a fuel supply flow channel through multiple internal cross holes to ensure that the fuel injection pressure reaches 150-200Mpa. The study found that the wear of the plunger, oil outlet valve, needle valve and other parts inside the fuel injection body will cause the oil pressure of the fuel supply system to be too low, and the fuel injection will be intermittent, making the diesel atomization effect poor, which is the cause of insufficient diesel engine power. , The main reason affecting fuel utilization. One of the main reasons for these wears is that duri...

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Problems solved by technology

Feng Zhoupeng and others designed the deburring tool for oblique intersecting holes. Through the cutting method, it realized the removal of sharp edges and burrs at the intersecting holes of large parts; The design and experimental research can remove the sharp edges and burrs at the intersection of the oil inlet and return holes... The above methods can remove the sharp edges and burrs at the intersections, and the efficiency is high, but the above methods cannot accurately control the burrs after removing the burrs. The position of the intersecting line transitions in a smooth arc, and the radius of the arc structure cannot be precisely controlled

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