Hydraulic system of hybrid friction welding machine

Abstract

The invention provides a hydraulic system of a hybrid friction welding machine. The hydraulic system of the hybrid friction welding machine is mainly composed of a one-way valve, a variable-displacement piston pump, a filter, a two-position and two-way reversing valve, an electromagnetic overflow valve, a vane pump, an oil tank, a pressure gauge, a three-position and four-way electro-hydraulic reversing valve, a special three-stage pressure relief valve, a throttle valve, a two-position and four-way electro-hydraulic reversing valve, an upsetting cylinder, a clutch cylinder, a before-work centering cylinder, a work clamping cylinder, an after-work centering cylinder, a spindle cylinder, a one-way throttle valve, a one-way pressure relief valve, a two-position and four-way electromagnetic reversing valve, a pressure relief valve, an energy accumulator, an overflow valve, a check valve and the like. An oil supply system adopts the low-pressure large-flow vane pump and the high-pressure small-flow plunger pump to supply oil; the plunger pump and the energy accumulator supply oil to complete rapid upsetting, and the rapid upsetting speed is 10 times higher than the operating feed speed; unloading of the hydraulic system is achieved through the electromagnetic overflow valve, so that power consumption is reduced, and noise is lowered; and the hydraulic system is simple in structure,reasonable in arrangement, high in work efficiency, low in production cost, stable in operation and capable of well meeting friction welding requirements.

Description

technical field [0001] The invention relates to the technical field of friction welding machines, in particular to a hydraulic system of a hybrid friction welding machine. Background technique [0002] Friction welding is a solid-phase hot-press welding method: using frictional heat as the heat source, heat is generated between the surfaces of two objects through mechanical frictional movement and applied loads, and the surfaces of the two welded parts are heated to a plastic state, and then the heat is used to A welding method that firmly connects the same material and dissimilar materials by upsetting and pressing. During welding, the joint surface does not melt, and the metallographic structure of the formed weld is forged structure, and the mechanical properties of the weld are higher than the strength of the base metal. This welding method does not require filler metal, welding rod, flux and shielding gas, and is a green and environmentally friendly welding method in t...

AI Technical Summary

Problems solved by technology

However, the maximum upsetting force of friction welding machines produced in my country is only 130 tons, and the welding area of ​​oil drill pipes is less than 9500mm. 2 , Welding area 9500~16000mm 2 The left and right large-scale oil drill pipes, heavy-duty drill pipes and drill collars cannot be produced, and can only be imported or processed and manufactured as a whole, which has low efficiency, high cost, and waste of materials and energy.

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