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Welding method for filter screen

A welding method and filter technology, applied in welding equipment, welding/welding/cutting items, non-electric welding equipment, etc., can solve problems such as low strength of solder joints at joints, influence on hydraulic mechanism transmission, and shortened service life. Achieve the effect of avoiding color difference in appearance, no desoldering service life, and stable use

Inactive Publication Date: 2017-01-11
KONFOONG MATERIALS INTERNATIONAL CO LTD
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Problems solved by technology

Although this method can realize the mass production of the filter screen, and can also avoid the color difference defect of the filter screen after welding, but the filter screen made by this welding method has low solder joint strength and is easy to fall off. As a result, the transmission of the hydraulic mechanism will be affected, and the service life will also be shortened

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  • Welding method for filter screen

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Embodiment Construction

[0033] After the inventor's analysis, it is found that the prior art filter screen is welded by argon arc welding, and multi-point welding is performed on the contact surface of the double-layer filter screen. In the use process of the double-layer filter screen made by this method, the welding joint strength of the joint is not high, and the double-layer filter screen is easy to fall off, which affects the transmission of the hydraulic mechanism.

[0034] In order to solve the problem of low welding joint strength when the double-layer filter screen is made by the argon arc welding method, the inventor of the present invention has further studied the welding method and found that the multi-point welding of the edge contact surface in the prior art is optimized to The face-to-face welding of the stainless steel filter screen realizes the large-area welding between the filter screens, so that the double-layer filter screens mutually diffuse to form a tight bonding layer. The filter...

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Abstract

The invention provides a welding method for a filter screen. The method comprises the steps that two layers of stainless steel filter screens are provided; after surface processing of the two layers of stainless steel filter screens, a tight and firm welding bonding layer is formed between the two layers of filter screens in a vacuum hot-pressing furnace through a vacuum diffusion welding method under compression and heating; and hence, filter screens are combined, and a double-layer filter screen is formed. By the vacuum diffusion welding technology, large-area welding is achieved between the two layers of filter screens, so that the two layers of filter screens diffuse to each other so as to form the firm bonding layer. The filter screen manufactured by the method has the advantages of more stable use, avoidance of unsoldering and a longer service life. In addition, during application of the vacuum diffusion welding technology, a vacuum degree is controlled strictly; the two layers of filter screens are not oxidized easily in the vacuum hot-pressing furnace; and thus, the defect that appearance of the double-layer filter screen processed by the vacuum diffusion welding has a color difference can be avoided.

Description

Technical field [0001] The invention relates to the hydraulic mechanism industry, in particular to a welding method of a filter screen. Background technique [0002] Hydraulic mechanism is a kind of use hydraulic oil as energy source to transfer energy to realize various processes. It has been widely used in heavy equipment and can be used in pressing process and press forming process, such as: forging, stamping, cold Extrusion, straightening, flanging, sheet deep drawing, powder metallurgy and pressing, etc. Double-layer stainless steel filters with different pore diameters and different thicknesses on the surface are more and more widely used in hydraulic mechanisms. The flow rate, flow rate and oil pressure of the hydraulic oil in the hydraulic mechanism can be adjusted through the pore size. The welding quality of the layer filter will directly affect the performance of the hydraulic mechanism. [0003] When manufacturing the double-layer filter screen of the hydraulic mechan...

Claims

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Application Information

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IPC IPC(8): B23K20/02B23K20/14B23K20/24B23K101/22
CPCB23K20/023B23K20/14B23K20/24
Inventor 姚力军潘杰相原俊夫大岩一彦王学泽王科
Owner KONFOONG MATERIALS INTERNATIONAL CO LTD
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