Neck tube supporting structure of vehicle LNG cylinder and forming die and forming method thereof

Abstract

The invention discloses a neck tube supporting structure of a vehicle LNG cylinder and a forming die and a forming method thereof. The forming die comprises a first die base plate; an extrusion core rod, one end of which is fixedly connected to the first die base plate; a second die base plate parallel to the first die base plate, and the first die base plate is connected with the second die baseplate through a plurality of springs; the two guide columns symmetrically arranged on the two sides of the extrusion core rod; wherein the second die base plate is provided with two guide through holes, the guide through holes and guide columns are arranged in a one-to-one correspondence mode, and the guide columns can move in the axial direction of the guide through holes; a backward extrusion upper die fixedly connected to the second die base plate; a second extrusion through hole is arranged on the backward extrusion upper die, and the second extrusion through hole and a first extrusion through hole are coaxially arranged; a base; a backward extrusion lower die fixedly mounted on the base and arranged opposite to the backward extrusion upper die; and two guide sleeves fixedly connectedto the base, and the two guide sleeves and the two guide columns are arranged in a one-to-one correspondence mode.

Description

technical field [0001] The invention belongs to the technical field of vehicle-mounted LNG gas cylinder manufacturing, and in particular relates to a neck tube support structure of a vehicle-mounted LNG gas cylinder, a forming die and a forming method thereof. Background technique [0002] The liquefied natural gas vehicle cylinder (LNG cylinder) belongs to the cryogenic insulation container and is the key component of the liquefied natural gas vehicle. It generally consists of an inner tank, outer shell, liquid inlet and outlet system, safety accessories, and a supporting structure connected between the inner tank and the outer shell. [0003] The neck tube is one of the most important internal support structures in the gas cylinder. One end is welded to the upper head of the liner, and the other end is welded to the header of the outer shell. As a part of the support structure, the neck tube is subject to working pressure (including the self-weight of the inner tank and cr...

AI Technical Summary

Problems solved by technology

[0007] The present invention also provides a forming method of the neck tube support structure of the vehicle-mounted LNG gas cylinder, which uses the forming die of the neck tube support structure of the vehicle-mounted LNG gas cylinder provided by the present invention, and through reasonable control of the extrusion process, the neck tube can be made Rapid prototyping of support structures, improving quality and solving the problem of low production efficiency

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