Once fine blanking forming method for thick plate disc

Abstract

The invention provides a once fine blanking forming method for a thick plate disc. The method comprises the following steps of: 1) preparation of equipment, raw materials and upper and lower once fine blanking forming dies; and 2) once fine blanking forming. The step 2) comprises the following steps that: 1, the upper and lower once fine blanking forming dies are arranged on an upper tabletop and a lower tabletop of a fine blanking machine respectively, and when a fine blanking mold is at an opening position, a bar stock is fed to a fine blanking station; (2) the fine blanking machine is started, and a lower workbench of the fine blanking machine moves upwards to apply blanking force FS to a female die, a round hole male die and an irregularly-shaped hole male die, apply blank holding force FR to a dowel bar, a round knock-out pin and an irregularly-shaped knock-out pin and apply back pressure FG to the knock-out pins; and 3, a lower workbench of the fine blanking machine moves downwards, a pressure plate withdraws the cut bar stock from a punch die under the action of the blank holding force FR, and a pushing plate ejects a thick plate disc part from the female die under the action of the back pressure FG to obtain the formed thick plate disc part. The method is applied to batch production, and has the characteristics of operational simplicity, high efficiency, cost saving and stable quality.

Description

technical field [0001] The invention relates to the field of part processing, in particular to a method for one-time fine-blanking of thick plate discs. Background technique [0002] The disc is a flower-shaped metal part widely used in scaffolding. The material of the part is SS400 or other low carbon steel, hot-rolled or cold-rolled thick steel plate, the thickness of the part is 8-12mm, and the wall between the holes is thin, which is about 60% of the material thickness. The part has high requirements on the section quality, the bright band is >75%, and the special-shaped hole and the outer contour are not allowed to be torn, and there are also high requirements on non-perpendicularity and flatness. Therefore, in the production of such parts, it is necessary to strictly control the cross-sectional quality of the parts to ensure flatness and non-perpendicularity. Due to the rapid development of the construction industry, there is a large demand for discs. In addition,...

AI Technical Summary

Problems solved by technology

Common defects during casting include: pores, sand sticking, sand inclusions, trachoma, sand swelling, cold shut, insufficient pouring, etc. Defects are likely to cause poor precision of parts, weak strength, and unstable quality in large batches

The blanking force and die strength increase with the thickness of the blanked parts. One-time fine blanking of thick plate parts has higher requirements on the total pressure of the fine blanking machine and the strength of the die. Therefore, step-by-step forming methods are often used. Punching semi-finished products, and then precision forming, this method ensures product quality, but the production cost of multi-process punching and forming is high

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