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新聞資訊 >> 銅蝸輪常見缺陷 -

在銅蝸輪的制造過程中，也會(huì)經(jīng)常出現(xiàn)一些常見的缺陷，下面讓我們一起了解下：
1、砂眼：在銅蝸輪表面或內(nèi)部有充塞著型砂的孔眼；
2、冷隔：金屬流互相對(duì)接或搭接但未熔合而出現(xiàn)的縫隙；
3、澆不足：由于金屬液未完全充滿型腔而產(chǎn)生的銅蝸輪缺肉；
4、變形：由于收縮應(yīng)力，開裂引起的銅蝸輪外形與尺寸與圖紙不符；
5、毛刺：銅蝸輪表面刺狀金屬突起物，常出現(xiàn)在型或芯的裂縫處，形狀極其不規(guī)則；
6、氣孔：砂芯的發(fā)氣量大、烘不干、砂芯的排氣能力差、工藝設(shè)計(jì)不合理、鐵水質(zhì)量差、澆注溫度低都是導(dǎo)致閥體銅蝸輪產(chǎn)生氣孔的主要因素；
7、其他的還有縮孔、沖砂、掉砂等。

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