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Stone inclusion soil abrasive-proof anti-impact drill bit

An impact-resistant, drill-bit technology, used in drills, earth-moving drilling, drilling equipment, etc., can solve the problems of inability to break rocks, easy to be worn or damaged, low diamonds, etc. Abrasion and impact resistance properties, the effect of efficient cutting drilling operations

Inactive Publication Date: 2010-03-24
ENG COLLEGE OF ENG CORPS PLA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no drill bit specially used for rocky soil geological conditions at home and abroad. The drill bit that can be used to cut soil cannot be diamonds, and the drill bit that can drill rocks cannot cut soil.
For example, the drill bit of a rock drill can only be used for pure rock drilling, and cannot break rocks in rocky soil; tools such as jackhammers and hydraulic hammers can only break hard soil layers or shallow rock layers, but are not suitable for rocky soil construction; However, soil cutter bits such as earth drills are only suitable for cutting soil. This is not only because diamonds are easy to be worn or damaged because of their low material strength, but also their structure is not suitable for crushing irregular stones in rocky soil. Therefore, There is an urgent need to develop drill bits suitable for rocky soil conditions

Method used

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  • Stone inclusion soil abrasive-proof anti-impact drill bit
  • Stone inclusion soil abrasive-proof anti-impact drill bit
  • Stone inclusion soil abrasive-proof anti-impact drill bit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1 The preparation method of rocky soil drill bit

[0021] 1. Parent body surface strengthening treatment

[0022] (1) According to the requirements of the geometric dimensions of the drill bit, the 7Cr7Mo2V2Si steel bar of the corresponding diameter and length is cut to make the drill bit matrix, and the oxide layer on the surface is removed to expose the real metal surface.

[0023] (2) Preheat the parent body to 650°C (the surface is dark red) with an oxygen-acetylene flame (adjusted to a neutral flame), and then use a Stellite190 alloy electrode (commercially available) to tilt 30° on the surface of the parent body, and make the electrode end 3~6mm away from the surface of the base metal, melt the end of the electrode with an oxygen-acetylene flame (the angle between the welding tip and the surface of the base metal is about 25°~30°), and drop it on the surface of the heated base metal; according to this method Cladding is performed sequentially on the su...

Embodiment 2

[0029] The impact wear test was carried out on the MPX-2000 testing machine. The test conditions are: dry friction and wear at room temperature (25°C), relative air humidity of RH60%, loads of 10N, 30N, 50N and 100N, sliding speeds of 2.68m / s, 3.99m / s and 8.00m / s, The total number of revolutions for each test is 1000 revolutions; the pair of friction parts is 120# white corundum test block. The test results show that the wear resistance of the drill base material made by the invention is 3-8 times that of the commonly used drill material 42CrMo alloy steel (tempering treatment, surface nitriding).

[0030] The drill bit produced by the present invention has been applied on a certain type of military rapid hole-forming drilling machine, and is used to complete the rapid drilling task in the rocky land zone (suburb of Xuzhou City, Jiangsu Province, Guanting Reservoir of Huailai County, Hebei Province, and Yangbajiao area of ​​Tibet) . The application result shows that the wear...

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Abstract

The invention relates to a wear-resistant and impact-resistant drill bit used in the civil engineering and drilling engineering. 7Cr7Mo2V2Si steel is used as the base material for a main body of the drill bit. A wear-resistant Stellite190 cobalt-base alloy reinforcing layer is melted onto the surface of the drill bit. The upper section of the main body is equipped with a radially and outwards projecting hard alloy bar, the middle-lower section is equipped with a small hard-alloy pill-shaped convex pillar, and the lower section is equipped with a wedged YG11C-type tungsten-cobalt hard alloy cutting blades. The drill bit is wear-resistant and impact-resistant, provided with a double-function of soil cutting and rock crashing, and is suitable for the rapid and high-efficiency drilling work ina stony stratum with stones or terranes.

Description

technical field [0001] The invention relates to a drill bit of a drilling tool used for drilling soil layers in civil engineering, in particular to a drill bit used for drilling operations on rocky soil layers with stones and rock layers in the soil. technical background [0002] At present, the drilling problem of rocky soil is an unsolved problem in the world. The geological structure of rocky soil is complex, mainly manifested as rocks, rock layers or soft soil layers (soil) sandwiched in the soil. Because the stone is much harder than the soil, the resistance between the two is very different, and the distribution of stones and soil layers is irregular. During the drilling operation of the drilling machine, the resistance acting on the drill bit is changeable, and the resistance changes irregularly, thus greatly Increased the difficulty of forming holes in rocky soil. Because the cutting mechanism of soil drilling and diamonds is different, the former is the drill bit ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/46
Inventor 谭业发严骏王小龙谭华储伟俊尤峻周春花
Owner ENG COLLEGE OF ENG CORPS PLA UNIV OF SCI & TECH
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