Clamp for laser welding of fuel metering valve magnetizer

Abstract

The invention provides a clamp for laser welding of a fuel metering valve magnetizer, and belongs to the technical field of fuel metering valve machining. The clamp for laser welding of the fuel metering valve magnetizer comprises a base, a core rod, a guide sleeve, a core sheet, a limiting spring and a reset spring. According to the clamp, the core rod with a first inclined plane is arranged, theguide sleeve with a sliding groove is arranged outside the core rod and located on the first inclined plane in a sleeving mode, the core sheet with a second inclined plane matched with the first inclined plane is arranged in the sliding groove in a sliding mode, the limiting spring is wound outside the core sheet, and one side of the guide sleeve abuts against the reset spring, so that when the guide sleeve is sleeved with the magnetizer to be welded and the applied thrust drives the guide sleeve to move, the core sheet extends out of the sliding groove, concentricity positioning of the magnetizer to be welded is achieved, structural deformation is avoided, the reset spring pushes the guide sleeve to reset when the thrust is removed, the core sheet retracts into the sliding groove, and the welded magnetizer can be taken down conveniently, so that laser welding machining on the fuel metering valve magnetizer is facilitated.

Description

technical field [0001] The invention relates to the technical field of fuel metering valve processing, in particular to a fixture for laser welding of a fuel metering valve magnet. Background technique [0002] The fuel metering valve is generally installed on the high-pressure oil pump of the automobile engine, and the adjustment of the oil flow is realized by the movement of the moving parts in the metering valve. [0003] At present, the fuel metering valves on the market generally have a solenoid valve structure. The wall at one end of the valve body is a magnetizer. The electromagnetic coil is sleeved outside the magnetometer. The cooperation of the armature is used to push the valve core in the valve body, so as to realize the adjustment of the oil flow. [0004] However, the magnetizer of the existing fuel metering valve is generally formed by laser welding of the three-section cylindrical structure arranged in sequence. Since the overall structure of the valve is sm...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned problems existing in the prior art, it is now intended to provide a fixture for laser welding of a fuel metering valve magnetizer, in which a protruding mandrel is provided on the base, and the end of the mandrel away from the base is provided with a limit stop. head, and the side wall of the mandrel at one end of the limit head is provided with a first inclined surface, in addition, the end of the mandrel provided with the first inclined surface is provided with a guide sleeve, and the guide sleeve is provided with several chute, each A chip is evenly slid in a chute, and a second inclined surface corresponding to the first inclined surface is arranged on the chip, and a limit spring is arranged on the periphery of the chip, and at the same time, a reset device is arranged between the guide sleeve and the base. The spring is such that after the three-section cylindrical structure is sleeved on the guide sleeve in sequence, the cylindrical structure is pushed toward the side of the base through the push rod, and the cylindrical structure pushes the guide sleeve to move, so that the first inclined surface and the second inclined surface The relative sliding occurs, so that the chip protrudes from the chute, and the protruding end of the chip is pressed against the inner wall of the cylindrical structure to be welded, so that the gapless fixing of the three sections of the cylindrical structure to be welded is realized, and the welding process is prevented. Problems such as poor concentricity and structural deformation occur in the middle, which improves the welding quality, ensures the magnetic permeability, and facilitates the installation of the cylindrical structure of the magnetic conductor to be welded. In addition, after the welding is completed, the thrust of the ejector rod is canceled, and the guide sleeve is in Under the action of the return spring, it moves in the opposite direction, so that the first inclined surface and the second inclined surface are separated, so that the limit spring can press the chip into the chute, so that the chip is separated from the inner wall of the magnetizer, thus facilitating the magnetizer. Taking it out can not only ensure the welding quality of the magnetizer, but also facilitate the demoulding of the magnetizer after welding, which is more conducive to the laser welding process of the magnetizer of the fuel metering valve

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