Connection structure and connection method of high-voltage common rail high-speed electromagnet tailstock and shell

Abstract

A connection structure and connection method between a high-voltage common rail high-speed electromagnet tailstock and a casing. The connection structure includes a tailstock and a shell. The tailstock is provided with a base, a socket and a sealing ring. The base is made of aluminum alloy, and the shell is made of stainless steel. The shell and the base form a concave-convex interlocking integrated structure through pressure riveting . The connection method includes the following steps: a. Processing the aluminum alloy base, stainless steel sleeve and sealing ring by conventional methods; b. Assembling the sealing ring, sleeve and base, inserting the sleeve into the base and pressing them in place; c. Internal assembly; d. Perform pressure riveting on the shell and the base. The advantages of the present invention are as follows: 1. The reliability of riveting is high, and the riveting interface realizes no clearance fit. 2. High riveting efficiency. The riveting pressure head does not need to be precisely aligned, which reduces the difficulty of the riveting process and improves the riveting efficiency. 3. The cost of processing and materials is low, 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 ...

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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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