Die casting machine and automatic judgment method of die casting quality

Abstract

The invention relates to a die casting machine and an automatic judgment method of die casting quality. The die casting machine comprises an injection oil cylinder provided with a pressure sensor and an injection position detecting read head, wherein the pressure sensor and the injection position detecting read head are connected with a curvometer. The injection process of the die casting machine has six characteristic values, namely low-speed injection speed, high-speed injection speed, position where low-speed is changed to high-speed, maximal speed, maximal pressure and pressurization set-up time. The method for detecting the current six characteristic values comprises the following steps: 1. setting the curvometer to obtain the sampling time, standard value of the characteristic values, collecting time, offset value and product sampling inspection rate; 2. using the curvometer and the pressure and position sensors to collect the injection pressure and injection position data during injection process; 3. calculating with the data obtained in the step 2 to obtain the injection speed data of the injection process; 4. calculating to extract the current values of the six characteristic values from the pressure, speed and position data in injection process; and 5. comparing the current values obtained in the step 4 with the standard values one by one; and outputting an alarm signal when the current values exceed the defined limits, thus ensuring the quality of workpieces.

Description

technical field [0001] The invention relates to a die-casting machine and an automatic judgment method for the quality of a die-casting workpiece. Background technique [0002] Die-casting production is an organic combination of materials, molds, presses, process parameters, and personnel. The die-casting production process is complex, with many changes, strong continuity, and large product batches. If it cannot be detected and corrected in time, it will lead to a high scrap rate. The decline in product quality seriously affects the economic benefits of enterprises. The process parameters of the traditional die-casting machine are determined by analyzing and testing the actual quality of the die-casting sample and repeatedly adjusting according to the sampling inspection results. To obtain a unified process, if these factors change during normal production, it will inevitably lead to a reduction in the quality of die-casting workpieces. Therefore, timely detection of change...

AI Technical Summary

Problems solved by technology

However, the structure is complex, and its work cannot reflect the quality of the die-casting workpiece, and cannot be adjusted in time, which will easily lead to a large number of defective products

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