System and method for monitoring and determining quality of die-cast product based on local extrusion stroke

Abstract

The invention provides a system and a method for monitoring and determining quality of a die-cast product based on a local extrusion stroke. An extrusion oil cylinder suite is adopted to perform localextrusion, the extrusion stroke of an extrusion pin is automatically extruded in a production process, extrusion parameters are set, the local extrusion pin stroke is monitored, local extrusion effect is confirmed, a die-casting machine automatically identifies and determines products which do not meet requirements of an extrusion process; and a take robot automatically selects and removes unqualified products. The system can effectively control the extrusion process, and precisely sets the extrusion stroke, so that die-casting quality is improved, an extrusion anomaly event is timely found and processed, the yield is effectively increased, and production efficiency is effectively improved; extrusion key parameters of each modulus in a production process can be recorded, so that the localextrusion process is traced; and after the extrusion stroke continuously exceeds certain modulus, the die-casting machine is automatically stopped, so that batch scrap is prevented.

Description

technical field [0001] The invention relates to the technical field of local extrusion technology, in particular to a system and method for determining the quality of die-casting products based on local extrusion stroke monitoring. Background technique [0002] Shrinkage porosity and shrinkage cavity defects in die-casting parts account for a relatively high proportion of all die-casting defects, especially for products with too thick local wall thickness, which cannot be solved by other die-casting processes. Local extrusion process can be used in After the die-casting mold filling is completed and before it is completely solidified, super high pressure (generally above 200MPa, more than 2 times the ordinary casting pressure) is applied to the product part, and the product is forced to feed, so that the product is partially solidified and formed in a semi-solidified state. Improving the local compactness of die castings can effectively reduce shrinkage porosity and shrinkag...

AI Technical Summary

Problems solved by technology

However, when the extrusion delay time is too short, extrusion will be performed when the feed port is not solidified, which will cause the molten metal in the cavity to flow backwards, and the extrusion effect cannot be achieved; when the extrusion delay time is too long, the local extrusion part will solidify If the extrusion rate is too high, the extrusion pressure is too large or the extrusion speed is too fast, it is easy to cause internal cracks in the extrusion part.

Even in the debugging stage of the die-casting process, the partial extrusion process can meet the product quality standards. In mass production, due to the complexity and variability of the die-casting process, the extrusion process cannot be effectively controlled, and the local extrusion effect is difficult to judge. The product quality cannot be effectively managed

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