CN202954743U

CN202954743U - Down-the-hole drill bit

Info

Publication number: CN202954743U
Application number: CN 201220637640
Authority: CN
Inventors: 文华
Original assignee: ZHUZHOU TIANLI DRILLING TOOL CO Ltd
Current assignee: ZHUZHOU TIANLI DRILLING TOOL CO Ltd
Priority date: 2012-11-28
Filing date: 2012-11-28
Publication date: 2013-05-29
Anticipated expiration: 2022-11-28

Abstract

The utility model relates to a down-the-hole drill bit which comprises a drill bit base body and a working face which is divided into an edge face, a transition face and an end face. The edge face is placed on the outermost side of the working face. The end face is placed on the top portion of the working face. The transition face is placed between the edge face and the end face. An end face air hole which is communicated with a tail hole is formed in the end face. 1-7 edge face air holes which are in radial distribution on a position between two adjacent hard alloy teeth and are communicated with the tail hole are designed to be formed in the edge face. According to the down-the-hole drill bit, a low-air-pressure down-the-hole drill bit is improved, high-pressure air flow is used to the maximum extent to help rock breaking, rock dregs can be discharged smoothly, hole drilling efficiency is improved, the service life of the drill bit is prolonged, and accordingly using cost is lowered, energy is saved, consumption of resources is lowered.

Description

A kind of down-the-hold drill bit

Technical field

The utility model relates to a kind of down-the-hold drill bit, and particularly a kind of drill bit head has the energy-efficient down-the-hold drill bit of gas cell distribution.

Background technology

Drill bit is a kind of stone field that is widely used in, exploitation of mineral resources, urban construction, and the required accessory of rig that adopts of national basis Facilities Construction, rig and drill bit kind thereof are a lot, the hidden hole drilling punching is because its drilling efficiency is high, and safety factor is high, has been a kind of hole knockout of China's extensive use.Because that uses is extensive, has supporting with it down-the-hold drill bit now in use, has following deficiency: the one, because the angle of top air vent can not be discharged the rock disintegrating slag completely effectively, cause occurring early stage broken teeth, fall tooth, collapse piece; The 2nd, the repeated wear of drill bit causes that drilling efficiency is low, the drill bit overall life is short, in addition, because the repeated wear during boring produces idle work, has caused the waste of energy consumption, simultaneously the used resource of making drill bit has also been caused huge waste; The 3rd, a little less than the drill bit head steel body maximum outside diameter place design of thin, premature wear occurs easily and the phenomenon such as scrap.

Summary of the invention

The purpose of this utility model just provides a kind of drill bit that can effectively overcome defects.

The technical solution of the utility model realizes that by following approach it contains bit matrix and work plane, it is characterized in that, work plane is divided into edge surface, transition face and end face, wherein, edge surface is positioned at the outermost of work plane, becomes the 35-45 degree with end face, be distributed with 5-8 grain hard-metal insert, end face is positioned at the work plane top, is distributed with 2-4 grain hard-metal insert, and transition face is between edge surface and end face, become the 10-25 degree with respect to end face, be distributed with 2-4 grain hard-metal insert; End face is provided with the end face pore of a logical uropore, and the diameter of end face pore is 16-22mm, and end face pore axis becomes 10-20 degree angle with end face.Also be designed with the edge surface pore of 1-7 radial distribution logical uropore between two adjacent hard-metal inserts on the edge surface, the diameter of edge surface pore is 8-14mm, and the axis of edge surface pore and the angle of end face are the 35-45 degree.

Be provided with the straight line that is parallel to end face pore axis of a 2-5mm at work plane maximum outside diameter place, and end face pore 7 is designed with an air channel 6 that leads to straight line 4.

The low pneumatic down-the-hole bit of this practical modified is that a kind of maximum utilizes high pressure draught to come auxiliary rock, and the rock disintegrating slag is discharged smoothly, to reach the raising drilling efficiency, prolongs the application life of drill bit, thereby reduces use cost, the consumption of energy conservation, resource.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is sectional view of the present utility model.

Fig. 3 is the plan view of the utility model work plane.

Wherein: edge surface 1, transition face 2, end face 3, straight line 4, hard-metal insert 5, air channel 6, end face pore 7, edge surface pore 8.

The specific embodiment

Describe the specific embodiment of the present utility model in detail below in conjunction with accompanying drawing.

The utility model contains bit matrix and work plane, and wherein work plane is divided into edge surface 1, transition face 2 and end face 3, and edge surface 1 is positioned at the outermost of work plane, with 3 one-tenth 35-45 degree of end face, the utility model adopts 45 degree, is distributed with 5-8 grain hard-metal insert 5, and the utility model adopts 6; End face 3 is positioned at the work plane top, is distributed with 2-4 grain hard-metal insert 5, and the utility model adopts 2; Transition face 2 becomes the 10-25 degree with respect to end face between edge surface 1 and end face 3, the utility model adopts 20 degree, is distributed with 2-4 grain hard-metal insert 5, and the utility model adopts 2.

End face 3 is provided with the end face pore 7 of a logical uropore, the diameter of end face pore 7 is 16-22mm, the utility model adopts 16mm, the axis of end face pore becomes 10-20 degree angle with end face, the utility model adopts 15 degree, end face pore 7 is designed with an air channel 6 that leads to straight line 4, and the purpose of this design is for by outside the timely tap of rock disintegrating slag of macropore high pressure draught at the bottom of to the hole, avoids the repeated wear of rock disintegrating slag and carbide alloy and application life of reducing drill bit.

Also be designed with the edge surface pore 8 of 1-7 radial distribution logical uropore between two adjacent hard-metal inserts on the edge surface 1, the utility model adopts 3, the diameter of edge surface pore is 8-14mm, the utility model adopts 10mm, the axis of edge surface pore and the angle of end face are the 35-45 degree, the utility model adopts 45 degree, and the purpose of this design is for assisting the carbide alloy at edge to the fragmentation of rock by the high pressure draught of aperture, to improve the overall application life of drill bit.

Be provided with the straight line 4 that is parallel to end face pore 7 axis of a 2-5mm at work plane maximum outside diameter place; the utility model adopts 2.5 mm; purpose is for the carbide alloy 5 of protecting edge can in use not drop, and makes the drill bit early time discards to avoid carbide alloy to drop in early days.

Preparation method of the present utility model: at first by particular manufacturing craft by forging into the product blank of Fig. 1 profile.The blank that forges is carried out in advance heat treatment.The accurate processing of afterbody connection and the typing of outer shape are processed by machine according to Design Requirement Drawing again, drill bit head is pressed designing requirement machine-shaping, by after the heat treatment drill bit being carried out inlaying of carbide alloy, it is stressed evenly to make product have a carbide alloy, high pressure draught auxiliary rock and high pressure draught are discharged the smoothness of detritus, make the drill bit driving speed fast, production efficiency is high.

Claims

1. a down-the-hold drill bit contains bit matrix and work plane, it is characterized in that:

A) described work plane is divided into edge surface (1), transition face (2) and end face (3), edge surface (1) is positioned at the outermost of work plane, become the 35-45 degree with end face (3), and be distributed with 5-8 grain hard-metal insert (5), end face (3) is positioned at the work plane top, is distributed with 2-4 grain hard-metal insert (5), and transition face (2) is positioned between edge surface (1) and the end face (3), become the 10-25 degree with respect to end face, be distributed with 2-4 grain hard-metal insert (5);

B) end face (3) is provided with the end face pore (7) of a logical uropore, and the diameter of end face pore (7) is 16-22mm, and the axis of end face pore becomes 10-20 degree angle with end face;

C) also be designed with 1-7 radial distribution led to uropore between two adjacent hard-metal inserts edge surface pore (8) on the edge surface (1), the diameter of edge surface pore (8) is 8-14mm, and the axis of edge surface pore (8) and the angle of end face are the 35-45 degree;

D) be provided with the straight line (4) that is parallel to end face pore (7) axis of a 2-5mm at work plane maximum outside diameter place, and end face pore (7) is designed with an air channel (6) that leads to straight line (4).