La realizzazione di un punzone in metallo duro prevede diversi passaggi e richiede attrezzature e materiali specializzati. Innanzitutto, dobbiamo scegliere il giusto materiale in carburo di tungsteno adatto alla punzonatura con un uso durevole.
Essendo un materiale molto duro e durevole, il carburo è comunemente utilizzato negli utensili per stampaggio e negli stampi per presse. Esistono vari tipi di modelli in metallo duro, ad esempio KD20, RD50, KX03, RG3, FD15, H40S e CD650 ecc. Alcuni sono adatti per realizzare punzoni quadrati in metallo duro, come KD20, e alcuni sono adatti per la lavorazione di punzoni rotondi in metallo duro, come H40S. Esistono anche alcuni detti comuni per il metallo duro, come WC o HM (abbreviazione di “Hard Metal”).
Ecco una linea guida generale del processo:
Progettazione: in base all’utilizzo specifico di una serie di matrici per stampaggio, il progettista meccanico determina le specifiche e il design del punzone in metallo duro. Ciò include le dimensioni, la forma e qualsiasi caratteristica specifica richiesta per un’applicazione specifica.
Selezione del materiale: come accennato in precedenza, esistono vari tipi di materiali in carburo di tungsteno e modelli per la selezione della produzione di punzoni in carburo, alcuni materiali sono realizzati in Giappone, altri in Europa e altri in America o Cina. A seconda della forma del punzone (quadrato, rettangolare o rotondo), dovrai acquistare grezzi in carburo di tungsteno della dimensione e della forma appropriate per il tuo punzone.
Lavorazione: il carburo è estremamente duro e non può essere lavorato con metodi tradizionali. Invece, è tipicamente rettificato per modellarlo utilizzando mole diamantate o altri metodi abrasivi.
Sono inoltre necessarie alcune macchine speciali per la realizzazione di punzoni in metallo duro, ad esempio rettificatrice per profili (PG), smerigliatrice per superfici piane con mole diamantate (SG), macchine per elettroerosione a filo, ecc.
Potrebbe essere necessario utilizzare il software CAD/CAM per programmare i percorsi utensile per il taglio a filo e la rettifica di profili e quindi tagliare e rettificare il punzone in metallo duro nella forma e nelle dimensioni desiderate.
Finitura: dopo la lavorazione, il punzone in metallo duro potrebbe richiedere ulteriori operazioni di finitura per ottenere la finitura superficiale RA desiderata. Ciò può includere processi di lucidatura o lappatura a specchio per alcune aree specifiche.
Trattamento superficiale (facoltativo): a seconda dell’applicazione, potremmo scegliere di applicare trattamenti superficiali come rivestimenti o placcature per migliorare ulteriormente le prestazioni o la durata del punzone in metallo duro.
Alcuni rivestimenti comunemente usati per punzoni o inserti di matrici in metallo duro includono DLC (abbreviazione di “carbonio simile al diamante”), CrN, CrCN, Stagno, TiCN, TiALN, TiALCN, AlCrN e AlCrTiN, ecc.
Controllo di qualità: una volta prodotto il punzone in metallo duro, è importante eseguire controlli di qualità per garantire che soddisfi le tolleranze e i requisiti prestazionali specificati. Ciò può comportare l’ispezione dimensionale utilizzando apparecchiature di misurazione di precisione e il test del punzone in condizioni operative simulate.
Applicazione: I punzoni in metallo duro sono utilizzati principalmente nell’industria microeconomica, nell’industria automobilistica e nell’industria medica, l’industria microeconomica comprende la sottoindustria dei connettori e dei terminali, la sottoindustria dei semiconduttori e la sottoindustria dei computer, ecc.
Vale la pena notare che la produzione di punzoni in metallo duro richiede attrezzature e competenze specializzate. Pertanto, a meno che tu non abbia esperienza con la lavorazione del metallo duro, potrebbe essere più pratico acquistare punzoni in metallo duro prefabbricati o punzoni in metallo duro su misura da un fornitore professionale e affidabile.
Se hai domande e desideri discutere dei punzoni in metallo duro, non esitare a contattarci al numero +86-15338374626, sales@langdi-precision.com.
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