Method for forming steel blade in one-time pressing mode

Abstract

The invention provides a method for forming a steel blade in a one-time pressing mode. The method for forming the steel blade in the one-time pressing mode solves the problem that an existing blade consumes time and labor, cracks easily and affects operation efficiency when being formed in a welding mode. The method for forming the steel blade in the one-time pressing mode comprises the steps that (a) a steel plate is discharged and a positioning datum line is drawn on the steel plate; (b) the central line of a bent lower mould and the positioning datum line of the steel plate are aligned, an upper mould is bent and pressed downwards, and the steel plate is prebent to 17-23 degrees; (c) the bent steel plate is heated; (d) the heated bent steel plate is put into a forming lower mould, and an inner core is put into the bent steel plate; (e) a front forming upper mould and a rear forming upper mould are pressed downwards together until the blade is formed; (f) the front forming upper mould and the rear forming upper mould are moved upwards by a certain amount of displacement, together pressed rear ends of the blade are separated due to elasticity, and the inner core is taken out; (g) the front forming upper mould and the rear forming upper mould are downwards pressed again, and then after the rear forming upper mould is rotated upwards, the rear ends of the blade are welded to obtained the formed blade. The method for forming the steel blade in the one-time pressing mode has the advantages of being low in cost, simple in structure and convenient to machine.

Description

technical field

[0001] The invention relates to a molding method for components of an axial flow fan, in particular to a one-time pressing molding method for steel blades. Background technique

[0002] The impeller is the most critical component of the axial flow main fan, and the blade is the core part. Its design and processing are the most difficult and require the highest. The blades of domestic axial flow main fans generally adopt two processing methods: casting molding and welding molding. In the actual production process, different molding methods can be selected according to the requirements of various mines for the blade material.

[0003] At present, compared with casting molding, the traditional welding-forming blades of domestic fan factories have the advantages of relatively simple processing technology, high yield, less defects, and low cost. Therefore, most manufacturers adopt the processing technology of welding blades and blade shafts to manufacture steel M...

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