Shielding gas flow controller for a welding apparatus

A technology of flow controller and shielding gas, which is applied in the direction of flow control of electric devices, flow control, welding equipment, etc.

Active Publication Date: 2010-10-06
ALEXANDER BINZEL SCHWEISSTECHN GMBH & CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Shielding gas flow controller for a welding apparatus
  • Shielding gas flow controller for a welding apparatus
  • Shielding gas flow controller for a welding apparatus

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Embodiment Construction

[0022] see figure 1 with figure 2 , the present invention provides an improvement in gas flow stability by automatically controlling the average time the valve remains open, thereby reducing the flow variation typically experienced in prior art welding gas supply installations. In a welding gas supply installation, the gas is supplied from a feed point 200 which will be arranged at a distance from the regulator 100 . In such prior art installations, it is common to locate the regulator 100 at a considerable distance from the gas final exit point 1100 . These distances will generally vary from one facility to another, and the dimensions of supply hoses, pipes, tubing, adapters and connectors will vary, with the result that gas flow levels will be affected, Such as Figure 8 As shown in the measurements performed in , and thus the flow needs to be adjusted in response to pressure changes in order to keep flow levels within acceptable tolerances.

[0023] The gas flow contro...

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Abstract

A shielding gas flow controller (100) for an electric arc welding apparatus for insertion into a shielding gas supply line between a shielding gas source (200) and a shielding gas valve (800) of the electric arc welding apparatus, the flow controller having a shielding gas (200) input and a shielding gas output (600), a controllable gas valve (110) connected between the shielding gas in- and outputs and having a control input (170), and a controller means having a first input (400) for receiving a welding signal representing an electrical welding arc current (900) of the welding apparatus during a welding operation and a gas flow setting control (300) means adapted to generate a flow setting output being function of the welding signal and representing a desired shielding gas flow. The shielding gas flow controller further comprises an input pressure sensor (120) connected to the shielding gas input and arranged to provide a shielding gas input pressure measurement (150) to a second controller means input, and an output pressure sensor (140) connected to the shielding gas output and arranged to provide a shielding gas output pressure measurement to a third controller means input (160), and a flow setting output modifying means adapted to modify the flow setting output of the gas flow setting control means based on the shielding gas input and output pressure measurements, the welding signal, and a charateristic of the controllable valve into a control signal (170) for input to the control input of the controllable gas valve so as to maintain during the welding operation a substantially constant shielding gas flow in the shielding gas supply line to the welding apparatus corresponding to the flow setting output substantially independent of actual shielding gas input and output pressures at the shielding gas in- and outputs, respectively.

Description

technical field [0001] The present invention relates to the field of providing filling gas or shielding gas (blanket gas), also known as shielding gas (shielding gas) or active gas, to welding points in electric welding equipment, and in particular to a method for use in various welding operations. A method and device for controlling the flows of shielding gas, shielding gas and active gas in stages. The field of the invention also relates to gas regulation for plasma cutting machines, wherein the flow of cutting gas (primary gas), shielding gas (secondary gas) or both is controlled by using the technical solutions provided by the present invention. Background technique [0002] For electric welding operations in which a shield of inert shielding gas is provided to the weld, the shielding gas is typically supplied from a centralized shielding gas supply facility, or from gas cylinders located near the welder unit of the welding apparatus. The shielding gas provided by the s...

Claims

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Application Information

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IPC IPC(8): B23K9/16B23K9/32G05D7/06
CPCB23K9/325G05D7/0635H05H2001/3494H05H1/341B23K9/0956G01M3/2815H05H1/3494
Inventor A·哈尔沃森M·法尔斯塔德
Owner ALEXANDER BINZEL SCHWEISSTECHN GMBH & CO
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