Connecting structure and method of tail seat and outer shell of high-pressure common rail high-speed electromagnet

Abstract

The invention discloses a connecting structure and method of a tail seat and an outer shell of a high-pressure common rail high-speed electromagnet. The connecting structure comprises the tail seat and the outer shell, wherein the tail seat is provided with a base, an inserting sleeve and a sealing ring. The base is made of an aluminum alloy material, the outer shell is made of a stainless steel material, and the outer shell and the base form a concave-convex interlocking type integrated structure through press-riveting. The connecting method comprises the following steps that a, the aluminumalloy base, the stainless steel inserting sleeve and the sealing ring are machined through a conventional method; b, the sealing ring, the inserting sleeve and the base are assembled, the inserting sleeve is inserted into the base and press-fitted in place; c, interior assembling units are assembled through a conventional method; and d, the outer shell and the base are press-riveted. The connecting structure and method of the tail seat and the outer shell of the high-pressure common rail high-speed electromagnet have the advantages that 1, the riveting stability is high, specifically, rivetingports are fitted without clearance; 2, the riveting efficiency is high, specifically, riveting pressing heads do not need to be precisely aligned, the difficulty of the riveting technology is reduced, and the efficiency of riveting is improved; and 3, the machining and material costs of riveting are low, specifically, the comprehensive cost is reduced by 20%, and the cost of electromagnet products is reduced by about 3.5%.

Description

technical field [0001] The invention relates to an electromagnet structure and a processing method, in particular to a connection structure and a corresponding connection method between a tailstock and a housing of a high-speed electromagnet used to control a fuel injector in a high-pressure common rail diesel electric injection engine. Background technique [0002] The implementation of the country's low-emission policy for the automobile industry has led to the upgrading of engine technology, and the electronically controlled fuel injection technology of high-pressure common rail diesel engines has become increasingly mature and popularized in China. High-speed electromagnets are key control actuators for control systems such as electronically controlled fuel injection systems for diesel engines. In the diesel engine electronically controlled fuel injection system, its function is to execute the system ECU command, control the pump valve to close, and complete the precise ...

AI Technical Summary

Problems solved by technology

[0003] like figure 1 As shown, the tailstock of the high-voltage common rail high-speed electromagnet in the prior art is an integral part, and the whole stainless steel bar is used, and it is finished by repeated clamping and processing through multiple processes such as turning and drilling. It is a ⊥-shaped circular frustum structure, and the selected material must meet the requirements of a bar with a diameter greater than its maximum structural size, resulting in excessive machining allowance, low material utilization, serious equipment and tool loss, large energy consumption, long processing cycle, and labor hours. The cost is high, causing the production cost of the structural part (tailstock) to remain high

When the electromagnet tailstock and the shell of the whole part are riveted and assembled, it is necessary to process a riveting notch at the riveting point of the tailstock in advance. The shell and the tailstock are made of stainless steel, and the joint degree of the riveting interface is not ideal. The riveted notch must be accurately aligned, once the position is misplaced, the tailstock and the shell will be scrapped

As a result, the production cost of high-speed electromagnet products is further increased

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