Vpliv načrtovanja poti pri 3D navarjanju kovin

Hriberšek, Tomi (author), Klobčar, Damjan (mentor), Tušek, Janez (comentor)

Obločno navarjanje z dodajanjem žice je postopek izdelave trodimenzionalnih kovinskih objektov, ki v industriji vzbuja veliko zanimanja. Omogoča izdelavo prototipov, orodij ter omogoča popravilo že obstoječih strojnih delov pri relativno nizkem denarnem vložku. V zaključni nalogi je najprej predstavljeno teoretično ozadje obločnega navarjanja z dodajanjem žice. Predstavljeni so tudi varilni postopki MIG/MAG ter CMT. Raziskovali smo, kako različni parametri nihanja gorilnika, ki ga omogoča robot, vplivajo na obliko varka. Zanimala nas je tudi uporabnost nihanja gorilnika za izdelavo hladilnih kanalov. Raziskovali smo, kakšen vpliv ima pri navarjanju ravnih sten jakost varilnega toka pri konstantnem razmerju vž/v, kakšen vpliv ima debelina varilne žice ter kakšen je vpliv varilne hitrosti. Ugotovili smo, da nihanje gorilnika ni uporabno za izdelavo cik-cak hladilnih kanalov, saj varki nimajo konstantne širine in višine, kar onemogoča nalaganje le teh v stene. Pri navarjanju ravnih sten smo ugotovili, da nastanejo pri konstantnem razmerju vž/v stene z nižjo valovitostjo pri srednjih tokovih, ki jih omogoča vir toka. Ugotovili smo tudi, da s tanjšo varilno žico dobimo vizualno lepše ter višje stene z večjo efektivno širino stene. Višja hitrost varjenja vpliva predvsem na nižjo višino in širino sten.

• Language: Slovenian
• Keywords: obločno navarjanje z dodajanjem žice varjenje MIG/MAG CMT postopek varjenja orodno jeklo maraging jeklo robotsko navarjanje nihanje gorilnika - pendlanje
• Work type: Bachelor thesis/paper
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2017
• PID: 20.500.12556/RUL-92923
• Publication date in RUL: 09.07.2017

Secondary language

• Language: English
• Title: The influence of path at 3D metal cladding

Abstract

Wire Arc Additive Manufacturing is a manufacturing process that enables us to produce three-dimensional objects which are in great interest in the industry. It enables producing tools, prototypes and it is also possible to repair existing machine parts at relative low costs with this method. This research contains multiple chapters. Some theoretical basics about wire arc additive manufacturing are presented at first. MIG/MAG and CMT welding processes are also described. We experimentally investigated the influence of parameters at weave bead welding on the shape of the bead and if weave bead welding is useable for making cooling channels. We also experimentally investigated the impact of different parameters on the shape of straight walls: different current at same wire feed speed/welding speed ratio; wire diameter and the impact of welding speed. We found out that weave bead welding is not suitable for making zig-zag shaped cooling channels, because the height of the bead is not constant throughout the length of the bead. We found out that straight walls have less waviness when at constant wire feed speed/welding speed the welding current is in the mid-range. We also found out that higher walls with less waviness are generated when using thinner welding wire. Higher welding speed have mostly an effect on the height and the width of welded walls.

• Keywords: Wire Arc Additive Manufacturing MIG/MAG welding CMT welding process tool steels maraging steels robotic welding weave bead welding