欧美人妻精品一区二区三区99,中文字幕日韩精品内射,精品国产综合成人亚洲区,久久香蕉国产线熟妇人妻

You should learn about mining inserts and various mining bits tipped with them, whether you work for crude&gas industry, mining industry, or construction. I can see why it comes cause you realize works in these industries, more knowledge of tools you obtain, less hazardous condition and risk your guys will confront. As a manufacturer with exportation of mining tips gradually taking up one fourth of our whole annual throughput, we are thrilled to write this blog sharing some fundamental stuff about carbide mining tips that we are fabricating and familiar with. It couldn’t be better if it assists in knowing the categories of drilling tips made of carbide and what mining rigs they are used on.

*For the record, all content of Meetyou carbide Co., Ltd. is intended for a supplement of personal experience, not replacing for professional engineering judgment.

What-to-know about 4 types of carbide mining bits commonly consumed in modern mining industry? 2

Main Features of carbide mining inserts

All mining tips are designed for ensuring?themself?as durable as possible regardless of the rock and dribs?involved.?whether made of pure WC-Co carbide or sintered polycrystalline diamond&carbide compact,?they are both characterized by their unique particle size and distribution of Co atoms offering themselves outstanding abrasion resistance, compact toughness, and the foremost stiffness against heat deformation.

Grain size:?In contrast with?powders of carbide cutting tools, those of mining inserts are supposed to be as big as possible which normally?reach up to from 0.4μm to 3.5μm in diameter. Simply put,?that’s because?on the microscopic level?if a cracking occurs , it has to either pass through WC particles or get around them in a zigzag way. No matter which way the cracking goes, WC particles in bigger grain size cost it more fracture energy to penetrate, and meanwhile more surface area to skirt around. Consequently, the cracking propagation can be restrained. Statistic shows coarse carbide is 20% to 30% stronger than conventional carbide in toughness.

Pic 1. the metallographic structure of 3.5μm WC-Co carbide.
Pic 1. the metallographic structure of 3.5μm WC-Co carbide.

Distribution of Co: On the other hand, technology of carburizing treatment has been progressed in recent years for transferring Co from peripheral region to central area in a carbide part, which makes there is more Cobalt in core and less Co in outside. Many experiments have proven that carbide parts including that distribution of Co(so-called dual phase cemented carbide) are more wearable in exterior and percussion-resistant in interior, compared with normally designed carbide parts.

pic.2 distribution of Co and its impact to hardness of mining bits
pic.2 distribution of Co and its impact to hardness of mining bits

In addition to preceding 2 points, mining tips have be tailored into distinctive shapes for optimizing the performance in dealing with various overburden and ore bodies when they are assembled to bits blow.

Percussion mining bits:?DTH drilling rig and electric jackhammer,

Rotary mining bits: cone bit, shield TBM scraper (for underground tunneling), and cutting pick(for heading machine and coal cutter)

accessory in mining industry?such as convey belt scraper blade(waste and spoil cleaning system), etc.

Within few minutes of reviewing all carbide tips in the pictures, hopefully you have already made a solid impression of them. Then you will learn what tool bits they are mounted on and what on earth they are capable of from the next text. They will be expounded as their order that get indicated in the picture.

Percussion rock mining bit

Exactly as its name implies, The function of percussion rock mining bits is largely dependent on the principle of percussion mechanism. Its built-in motor generates a percussive energy periodically thrust its bore head into ground creating many crackings and within each interval, the bore head rotates at a certain degree, which results in all overburden in the area that the rock mining bit covers gets smashed into small debris. Then a compressed air or a stream of high-pressure fluid comes out from a hole in bore stem and flush away all debris to form a round hole.

In general, percussion rock drills are utilized for two main purposes,?the first of which is to bore blast holes for filling with?explosives.?Secondly, It used for crashing some solid material for good, such as cement blocks.

There are 3 types of carbide drill heads on percussion rock mining bit available in our store, showed in the picture.

What-to-know about 4 types of carbide mining bits commonly consumed in modern mining industry? 3

Rotary rock mining bit

Differing from percussion bits,?rotary rock drill burrow itself into earth’s face relying on its cutting edge, where rocks get by rotary toque and longitudinal thrust. There are cone drill, coal electric jackdrill, coal cutting pick, rock core drill, and TBM scraper blade falling into this category.

Electric coal jackdrill ?

With carbide or PDC substrate welded on its dual wing bit, This kind of portable drill is used for boring short roof-bolting support hole and blast hole on the face of coal seam. In order to avoiding excessive dust concentration occurred during manual operation, it’s usually applicable for holes in depth from 1 to 2m and diameter less than 45mm.

What-to-know about 4 types of carbide mining bits commonly consumed in modern mining industry? 4

Cone mining bit

It’s also called roller cone bit cause there are conventionally two or three severally rotating conical sub-bits amounted on its drilling string, which greatly elevate the efficiency when drilling blast holes with 280-440mm in diameter on medium hard rock formation and wellbores in diameter up to 300mm.

By the way, rock hardness is the primary factor taken into account upon selecting a cone bit. Harder formation requires cone bits with short teeth, whereas softer formation requires the opposite.

In most time, carbide tips with high toughness and hardness are adopted on cone bits. ?These tips are devised in different shapes (showed as below) in order to gain prominent cutting ability. A layer of wear-resisting hardfacing covers the whole bit body for high wear resistance and prolonged tool life.

What-to-know about 4 types of carbide mining bits commonly consumed in modern mining industry? 5

PDC mining bit(Polycrystalline diamond compact)

Another appropriate rotary drilling bit is PCD(poly crystalline diamond) embedded mining bit. Unlike roller cone drills, PDC drills belong to a sort of fix-cutter drag bit since they don’t have rotating cones and have to operate as a solid unit. All cutting movement is achieved in form of scraping materials by artificial diamond compact in various patterns. The diamond is sinterred into to a carbide matrix to form a integrated substrate. Admittedly PDC mining bits are capable of drilling stratum in compact strength less than 18000PSI and rock abrasiveness less than 41°. which means they are quite suitable for dealing with soft to medium hard materials, such as halite, gypsum, marlstone, limestone.

There are two common types of existence of PDC mining bits,

1.PCD substrate brazed into carbide bit body with nature diamond gauge protection bars.

2.PCD substrate embedded into steel body by mechanical fit with carbide protection bars.

Surely they are protected by a wearable hardfacing on them. ?

Selecting principle

Hereafter come the principle for selecting suitable grade of carbide mining inserts. Regarding drilling and breaking extremely hard rock, strong stiffness is required in heavy-duty drill machinery. Hence only the carbide carbide with high cobalt content are qualified. As to hard and brittle rocks or materials with strong corrosiveness, cemented carbide grades with low cobalt content should be chosen.

Please Visit our?website and mining community?for more information on tools used for mining exploration, processing,lab analysis, and safety.

Schreibe einen Kommentar

Deine E-Mail-Adresse wird nicht ver?ffentlicht. Erforderliche Felder sind mit * markiert.

欧美视频在线观看国产专区-亚洲91精品在线观看| 性都花花世界亚洲综合-日韩av一区二区三区| 蜜臀一区二区三区精品在线-99久久久精品免费看国产| 麻豆久久国产精品亚洲-日本理论中文字幕在线视频| 日韩精品一区二区三区十八-日韩人妻少妇一区二区三区| 青木玲高清中文字幕在线看-视频在线免费观看你懂的| 午夜福利院免费在线观看-久久精品日产第一区二区三区画质| 日本高清二区视频久二区-大香蕉在线视频大香蕉在线视频| 白嫩美女娇喘呻吟高潮-久久一区二区三区日产精品| 男人的天堂久久精品激情-最新亚洲精品a国产播放| 中文字幕精品一区二区日本99-青青国产成人久久91网| 两性污污视频网站在线观看-亚洲欧美日韩激情一区| av噜噜国产在线观看-欧美视频亚洲视频一区二区三区| 中文字幕精品一区二区日本99-青青国产成人久久91网| 亚洲欧美另类综合偷拍-婷婷社区综合在线观看| 日韩高清在线观看一区二区-美产av在线免费观看| 亚洲女人黄色录像一区-日韩av电影在线免费看| 亚洲欧美日韩二区三区-国产在线欧美一区日韩二区| 国产精品一区二区欧美视频-国产一区二区三区天码| 亚洲日本一区二区三区黄色电形-中文字幕乱码免费熟女| 国产精品久久久精品一区-99久久免费精品国产男女性高好| 黄片黄片在线免费观看-激情综合网激情五月俺也去| 国产av剧情护士麻豆-三级国产精品欧美在线观看| 日本韩国亚洲欧美三级-日本东京不卡网一区二区三区| 欧美aa一级视频播放-久一一区二区三区大香蕉| 亚洲精品一区网站在线观看-黄页视频免费观看网站| 性色国产成人久久久精品二区三区-偷窥中国美女洗澡视频| 亚洲福利视频免费观看-中文字幕日本不卡一区二区| 91亚洲美女视频在线-熟妇人妻精品一区二区三区蜜臀| 欧洲精品一区二区三区中文字幕-91久久国产综合久久蜜月精品| 麻豆久久国产精品亚洲-日本理论中文字幕在线视频| 午夜日韩精品在线视频-亚洲网老鸭窝男人的天堂| 黄色美女网站大全中文字幕-欧美韩国日本一区二区| 97人妻精品一区二区三区爱与-日韩精品亚洲专区在线观看| 久久夜色精品亚洲噜国产av-大香蕉伊人猫咪在线观看| 91精品国产无线乱码在线-999精品视频免费看| 婷婷综合在线视频观看-亚洲一区二区三区香蕉| 欧美成人精品巨臀大屁股-亚洲综合欧美日韩一区| 一级小黄片在线免费看-亚洲欧美午夜情伊人888| 国产av剧情护士麻豆-三级国产精品欧美在线观看| 亚洲精品一区网站在线观看-黄页视频免费观看网站|