Boring Machine scrapers Types amp uses This module will look at the different types of scrapers used in the cutter head According to different geological condition design the different shape and choose the most suitable tungsten carbides in order to make sure the cutters can deal with ID: 1024986
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1. BULLETINSTitle: Tunnel Boring Machine scrapers Types & uses
2. This module will look at the different types of scrapers used in the cutter head, According to different geological condition design the different shape and choose the most suitable tungsten carbides, in order to make sure the cutters can deal with various working conditions, no matter the silty sand or the sandy gravel, our mission is to reduce the replacing frequency and improve work efficiency. The hardness after heat treatment is HRC 40±3，it has a pretty high wear resistance and toughness Tunnel Boring Machine scrapers Types & uses
3. Centre scraperCentre scraperFace scraperFace scraperBucket/Outer scraperFace scraperDifferent Types Of Scrapers
4. Different Types Of Scrapers Centre scraper-1Centre scraper-2Centre scraper-1:-This type of scraper mostly used for soft ground geologyScraper up to 15 mpa rock can be cut. Also, we call ripper this type of scrapperScraper front side installed tungsten carbide bit.This scraper can be mounted at single and double cutter housing with high - grade bolts In the cutter head structureCentre scraper-2:-Mostly they are using this type of scraper micro-tunnellingThis type of scraper used only soft soil ground (silty, sand)For wearing purpose Scraper front side welded with hard facing welding.Scraper welded in the cutter head centre position
5. Face scraper-2Face scraper-1Different Types Of ScrapersFace scraper-1:This type of scraper up to 15Mpa rock can be cut.Scraper front side installed tungsten carbide bit.This scraper mounted with higher strength multiple bolts in the cutter head structure.The bolts (Allen key) strength is 12.9 grade. Face scraper or cutting Knife-2:This type of scraper up to 10Mpa rock can be cut.Scraper front side installed tungsten carbide bit.This scraper mounted with single higher strength bolts in the cutter head structureBolt’s strength is 12.9 grade.
6. Bucket/Outer scraperDifferent Types Of ScrapersBucket scraper:This Bucket type of scraper up to 15Mpa rock can be cut.These type of scrapers are positioned on the very far edge of the TBM cutter head, this ensures that the rotating cutter-head cuts material to circa 35mm larger than the TBM main body. This is to prevent the TBM becoming stuck and assists with steering of the TBMThis type of scraper used all types of TBM (EPB, Slurry, Hard rock)Scraper front side installed tungsten carbide bit.This scraper mounted with Hexagonal bolts in the cutter head structureThe bolt’s strength is 10.9 grade. The hardness after heat treatment is HRC 40±3，it has a pretty high wear resistance and toughness
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