CN201228549Y - Mining cemented carbide drill tooth and pick and drill using the same - Google Patents
Mining cemented carbide drill tooth and pick and drill using the same Download PDFInfo
- Publication number
- CN201228549Y CN201228549Y CNU2008200534225U CN200820053422U CN201228549Y CN 201228549 Y CN201228549 Y CN 201228549Y CN U2008200534225 U CNU2008200534225 U CN U2008200534225U CN 200820053422 U CN200820053422 U CN 200820053422U CN 201228549 Y CN201228549 Y CN 201228549Y
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- tooth
- denticle
- pick
- screw thread
- drill
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Abstract
The utility model discloses a hard alloy drilling tooth for mining, and a pick and a drill bit which use the drilling tooth. The drill tooth comprises a cylindrical tooth body and a tooth crown located on one end of the tooth body, and an outer screw thread is arranged on the tooth body. The pick and the drill bit using the drilling tooth can prevent the hard alloy drilling tooth from being damaged by heat stress and mechanical stress in assembling process, so that the service life of the pick and the drill bit is improved, the tooth assembling process is simple and convenient and the production efficiency is improved.
Description
Technical field
The utility model belongs to mine hard alloy boring goods, is specifically related to pick and drill bit that a kind of mine hard alloy bores tooth and adopts this brill tooth.
Background technology
At present, mine hard alloy bores tooth and comprises columned denticle and crown, during assembling all be continue to use traditional high temperature brazing permanent tooth with cold pressing or hot embedding interference permanent tooth realize with the steel body on being connected of perforation and form mining digging pick, mining rock drilling columnar drill and oil exploration and extraction rock bit.
The production of mining digging pick is first soldering permanent tooth, and whole then heating isothermal hardening is modified.Because the copper base brazing material fusing point is 890 ℃, and the brazing temperature that pick is produced up to 890 ℃～930 ℃, must between carbide drill tooth inside and soldering interface, produce huge high temperature brazing thermal stress, cause carbide drill tooth organization internal to have the micro-crack defective and produce, the hardness and the intensity of boring tooth will reduce by 8%～15%.The tensile stress that thermal stress produced can surpass the tensile strength of alloy self in severe case, with the drawing crack of carbide drill tooth, and presents the arc crackle.Alloy on the cutting pick head bores tooth when rotation cut extruding rock climbing, carnassial tooth, broken tooth can often occur, finally causes the inefficacy of mining digging pick.
The steel body of mining digging pick is generally high strength steel, and the ideal temperature of quenching heat treatment is 930 ℃～950 ℃.Can't carry out desirable quenching heat treatment to the steel body owing to be subjected to the restriction of 890 ℃ of cored solder fusing points; and can only be below the solder fusing point; promptly at≤860 ℃ and do not touch the solder fusing point and do not destroy the quenching heat treatment of carrying out pick steel body under the situation of soldering; the performance of steel body material can't obtain performance like this; it is exposed and take off tooth very easily to cause the alloy that loses pick steel body protection to bore tooth, and the shear strength that reheat easily makes alloy bore tooth embrittlement and weld seam descends.If 890 ℃～930 ℃ soldering and quenching heat treatment are synchronous, then can directly cause the internal fissure of carbide drill tooth or top layer to burst because of boring linear expansion difference huge between meshing gold and steel body, because the linear expansion coefficient of steel is the twice of alloy, carbide alloy also is a kind of accurate fragile material.
When permanent tooth is colded pressing in employing, owing to be subjected to the straight degree of microcosmic camber, circle of pressure head and drill steel body material hardness, perforation and post tooth surface and the influence of press mounting tool, and press tooth pressure power, press-in speed and be pressed into the influence of angle, all can produce higher contact stress at its interface, stress state anxiety between the perforation, be difficult to eliminate the mattress at the bottom of scratch of perforation wall and the hole, often occur in and press just crush in the tooth process tooth and steel body to ftracture.The coarse more contact stress in surface is big more; stress on concavo-convex contact point and the concavo-convex contact surface is concentrated more; under the continuous effect of shock loading; stress point of concentrating and face make the carbide button surface form micro-flaw and crackle diffusion gradually; the broken teeth and the broken tooth that will cause drill bit, broken teeth, broken tooth and the tooth on the scope of operation hit the stopping accident of tooth, tooth stone roller tooth in the initiation operation.
The production of drill bit generally is the hot embedding interference permanent tooth of the above employing of diameter of phi 50mm, hot embedding interference permanent tooth is owing to be subjected to the influence of hardness, toughness and the linear expansivity of drill steel body material, and scope of operation situation in the operation and temperature amplitude be difficult to control, the hot embedding magnitude of interference can't be accurate, can only choose a relative shrink value comes hot setting-in to join permanent tooth, and broken tooth, fall the problem that tooth and drill steel cubical expansion split and can only lean on experience and probability to be controlled, interference fit connects the whole difficult quality stable and consistent of permanent tooth.
The utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and provide a kind of mine hard alloy to bore tooth and adopt the pick and the drill bit of this brill tooth, can avoid in assembling process because of the injury of thermal stress or mechanical stress the carbide drill tooth, improve the application life of pick and drill bit, make that to join tooth technology simple and convenient, and enhance productivity.
Realize that the technical scheme that the utility model purpose adopts is: mine hard alloy bores the crown that tooth comprises columned denticle and is positioned at denticle one end, denticle is provided with external screw thread, rotation direction by helix can be divided into dextrorotation external screw thread and sinistral external thread, and form of thread can be isosceles triangle, equilateral triangle, trapezoidal, zig-zag, waveform etc.
Can be provided with the rotation direction protruding helix opposite with external screw thread on the denticle on the crown, the crown shape can be taper shape, hemispherical, bullet-shaped, and the effect of helix is for transmission.
The bottom of denticle can be flat shape, truncated cone-shaped, arcuate bottom, and the bottom is provided with locking keyway, and its shape has yi word pattern or three forked types or cross, fits mutually with pick steel body perforation bottom similar shape and after being connected again in its bottom.
Pick of the present utility model comprises the steel body, in the perforation of steel body front end center, described brill tooth is housed, the cylinder inwall of center perforation be provided with bore the tooth denticle on the internal thread that matches of external screw thread, this internal thread is consistent with the external screw thread on boring the tooth denticle, the tooth form unanimity, constitute a screw thread pair, the direction that screws according to screw thread pair is divided into the secondary and left hand thread pair of right-handed thread again, this carbide drill tooth and pick steel body front end centre tooth aperture screw thread pair screw tight assembling, need not high temperature brazing and promptly finish connection, be combined into the digging pick.Pick belongs to mining monodentate digging instrument, is assemblied on the digger swing roller.
When the center perforation screws for the right-handed thread pair on carbide drill tooth denticle and the pick steel body, establish left-handed protruding helix on its crown, constitute the pick that a kind of dextrorotation structure connects.When the pick head pushes in the rock climbing at the rotation cut, because being subjected to the axial reaction force of rock bores on the left-handed protruding helix of tooth crown in the pick alloy, promptly produced the cextrorotory component opposite diametrically with left-handed protruding hand of helix, according to the worm drive principle, this component forces brill tooth crown to drive whole pick to right rotation.And the external screw thread that bores on the tooth denticle is the right-handed thread pair at this moment, has only direction motion of dextrorotation thereby impel alloy to bore tooth in the pick perforation, and tooth denticle screw-in pick perforation direction is consistent with boring.This screw thread pair syndeton, guaranteeing that fundamentally the externally threaded brill tooth of dextrorotation can not screw out and take off tooth in the perforation of pick center, add the locking keyway and the applying of the perforation bottom surface, center on the pick steel body of boring tooth denticle bottom, it is firm to make the secondary brill of right-handed thread tooth spiral close connection pick steel body, and the ballistic work transmission is steady.In like manner, can adopt also that the center perforation screws for the left hand thread pair on carbide drill tooth denticle and the pick steel body, establish the protruding helix of dextrorotation on its crown, thereby constitute the pick that a kind of left-handed structure connects, its kind of drive in operation is identical with the dextrorotation structure with the transmission result.Be provided with locking keyway in the bottom of described denticle in addition.
Drill bit of the present utility model is divided into mining columnar drill and oil extraction rock bit.Wherein mining columnar drill belongs to multiple tooth drilling tool, is assemblied on the hammer drill drill steel.Oil extraction belongs to group's tooth with rock bit and surveys the instrument of adopting, and is assemblied on the drilling pipe of oilrig.Mining columnar drill or oil extraction include the steel body with rock bit, described brill tooth is housed in each perforation on steel body front end, also be provided with internal thread on the cylinder of each perforation, this internal thread is consistent with the external screw thread on boring the tooth denticle, the tooth form unanimity, correspondingly one by one constitute a screw thread pair, describedly be with externally threaded brill tooth to screw to be assemblied in one by one in each perforation of columnar drill steel body through screw thread.Screw direction according to screw thread and be divided into the secondary and left hand thread pair of right-handed thread again.This carbide drill tooth and each perforation cylinder of drill steel body front end screw tight assembling through screw thread, need not high temperature brazing and finish connection, and need not to cold pressing permanent tooth or hot embedding interference permanent tooth are finished connection, are combined into mining columnar drill or rock bit.
Identical with pick, also be divided into the secondary and left hand thread pair of right-handed thread on brill tooth on the drill bit and the steel body front end being connected between each perforation, correspondingly on brill tooth crown, establish the rotation direction protruding helix opposite, be provided with locking keyway in the bottom of described denticle with external screw thread on the denticle.
The carbide drill tooth screws through screw thread pair and connects digging pick, rock drilling columnar drill and the oil exploration and extraction rock bit that combines, stopped the high temperature brazing thermal stress is bored tooth to alloy injury, stopped to cold pressing and the carnassial tooth that mechanical stress caused, the broken tooth of hot embedding interference permanent tooth, fallen the tooth accident, kept original performance of carbide drill tooth fully.Simultaneously, need not to take into account the fusing point of cored solder, it is poor to need not to take linear expansion huge between alloy and steel body into account, can carry out the optimal heat processing specification to the requirement of steel body by free fully original performance and the digging operation according to material to the heat treatment of steel body, gives full play to the use potentiality of steel.The denticle helicitic texture of this carbide alloy threaded bore tooth with bore tooth and screw the compound mode that is connected according to screw thread pair with the steel body, it is simple and convenient to join tooth technology, perforation stress is little, firm and reliable connection is held effectively the steady quality unanimity tightly, the production efficiency height stops to take off the tooth phenomenon fully.The connection that screws that carbide alloy threaded bore tooth reaches according to screw thread pair is tradition to be bored tooth reach a quantum jump and the innovation that is connected technology according to the soldering connection with interference fit.
Further specify the technical solution of the utility model below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the structural representation that the utility model mine hard alloy bores tooth.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the upward view of Fig. 1.
Fig. 4 is the structural representation of the utility model pick.
Fig. 5 is the structural representation of the utility model columnar drill.
Fig. 6 is the structural representation of the utility model rock bit.
The specific embodiment
As Fig. 1, shown in 2,3, mine hard alloy bores the crown that tooth comprises columned denticle and is positioned at denticle one end, and denticle is provided with dextrorotation external screw thread 2, and screw thread 2 tooth forms are waveform, the curved bottom of denticle is provided with cross locking keyway 3, is provided with some left-handed protruding helixes 1 on crown.This structure is fixed to the right-hand teeth body structure according to the externally threaded dextrorotatory form of denticle, and it bores tooth and is called dextrorotation structure brill tooth.In like manner, if establish sinistral external thread on the denticle, establish the protruding helix of dextrorotation on the crown, this brill tooth is called left-handed structure and bores tooth.
As shown in Figure 4, pick of the present utility model comprises steel body 4, embodiment 1 described brill tooth A is housed in steel body 4 front end center perforations, the cylinder inwall of center perforation be provided with bore the tooth denticle on the internal thread 5 that matches of external screw thread, this internal thread is consistent with the external screw thread on boring the tooth denticle, the tooth form unanimity constitutes a right-handed thread pair, and this pick is called the dextrorotation pick.In like manner, adopt the pick of left hand thread pair to be called left-handed pick.Dextrorotation pick and left-handed pick general designation spiral pick.
Example 3
Fig. 5 is a mining columnar drill of the present utility model, embodiment 1 described brill tooth A is housed in each perforation of drill steel body 4 front ends, be provided with internal thread on the cylinder in perforation, this internal thread is consistent with the external screw thread on boring the tooth denticle, the tooth form unanimity, corresponding one by one formation right-handed thread pair, this drill bit becomes the dextrorotation drill bit.In like manner, adopt the drill bit of left hand thread pair to be called left-handed drill bit.Dextrorotation drill bit and left-handed drill bit general designation augers.
Example 4
Fig. 6 is an oil exploration and extraction rock bit of the present utility model.The same with example 3 described drill bits, it also is that embodiment 1 described brill tooth A is housed in each perforation of drill steel body 4 front ends.
Claims (7)
1, a kind of mine hard alloy bores tooth, comprises columned denticle and the crown that is positioned at denticle one end, it is characterized in that denticle is provided with external screw thread.
2, mine hard alloy according to claim 1 bores tooth, it is characterized in that described crown is provided with the rotation direction protruding helix opposite with external screw thread on the denticle.
3, mine hard alloy according to claim 1 and 2 bores tooth, it is characterized in that the bottom of described denticle is provided with locking keyway.
4, a kind of pick comprises the steel body, mine hard alloy is housed in the perforation of steel body front end center bores tooth, it is characterized in that described brill tooth comprises columned denticle and the crown that is positioned at denticle one end, and denticle is provided with external screw thread; The cylinder inwall of described steel body front end center perforation be provided with bore the tooth denticle on the internal thread that matches of external screw thread.
5, pick according to claim 4 is characterized in that described crown is provided with the rotation direction protruding helix opposite with external screw thread on the denticle, is provided with locking keyway in the bottom of described denticle.
6, a kind of drill bit comprises the steel body, mine hard alloy is housed in each perforation on steel body front end bores tooth, it is characterized in that described brill tooth comprises columned denticle and the crown that is positioned at denticle one end, and denticle is provided with external screw thread; On the described steel body cylinder inwall of each perforation be provided with bore the tooth denticle on the internal thread that matches of external screw thread.
7, drill bit according to claim 6 is characterized in that described crown is provided with the rotation direction protruding helix opposite with external screw thread on the denticle, is provided with locking keyway in the bottom of described denticle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200534225U CN201228549Y (en) | 2008-06-12 | 2008-06-12 | Mining cemented carbide drill tooth and pick and drill using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200534225U CN201228549Y (en) | 2008-06-12 | 2008-06-12 | Mining cemented carbide drill tooth and pick and drill using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201228549Y true CN201228549Y (en) | 2009-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200534225U Expired - Fee Related CN201228549Y (en) | 2008-06-12 | 2008-06-12 | Mining cemented carbide drill tooth and pick and drill using the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201228549Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121383A (en) * | 2010-10-17 | 2011-07-13 | 李仕清 | Efficient cutting tooth |
| WO2012075671A1 (en) * | 2010-12-06 | 2012-06-14 | Li Shiqing | High efficiency crack-resistant reduced-dusting milling cutter |
| CN102852520A (en) * | 2012-05-15 | 2013-01-02 | 山东科技大学 | Self-locking method of excavator cutting tooth cemented carbide bit |
| CN103603663A (en) * | 2013-10-10 | 2014-02-26 | 安徽澳德矿山机械设备有限公司 | Novel wear-resistant pickaxe-shaped cutting pick used for heading machine |
| CN105064927A (en) * | 2015-08-20 | 2015-11-18 | 郑州神利达钻采设备有限公司 | Detachable drill bit |
| CN105257289A (en) * | 2015-09-28 | 2016-01-20 | 安庆市华骐机械配件有限公司 | Coal cutter drum with wear-resistant ultrasonic cutting picks |
| CN107060753A (en) * | 2017-01-25 | 2017-08-18 | 河南理工大学 | Bionical flow liner drop resistance conical pick and coal petrography cutting process design method |
-
2008
- 2008-06-12 CN CNU2008200534225U patent/CN201228549Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121383A (en) * | 2010-10-17 | 2011-07-13 | 李仕清 | Efficient cutting tooth |
| WO2012075671A1 (en) * | 2010-12-06 | 2012-06-14 | Li Shiqing | High efficiency crack-resistant reduced-dusting milling cutter |
| CN102852520A (en) * | 2012-05-15 | 2013-01-02 | 山东科技大学 | Self-locking method of excavator cutting tooth cemented carbide bit |
| CN103603663A (en) * | 2013-10-10 | 2014-02-26 | 安徽澳德矿山机械设备有限公司 | Novel wear-resistant pickaxe-shaped cutting pick used for heading machine |
| CN105064927A (en) * | 2015-08-20 | 2015-11-18 | 郑州神利达钻采设备有限公司 | Detachable drill bit |
| CN105064927B (en) * | 2015-08-20 | 2017-07-21 | 郑州神利达钻采设备有限公司 | Demountable bit |
| CN105257289A (en) * | 2015-09-28 | 2016-01-20 | 安庆市华骐机械配件有限公司 | Coal cutter drum with wear-resistant ultrasonic cutting picks |
| CN107060753A (en) * | 2017-01-25 | 2017-08-18 | 河南理工大学 | Bionical flow liner drop resistance conical pick and coal petrography cutting process design method |
| CN107060753B (en) * | 2017-01-25 | 2019-07-16 | 河南理工大学 | Bionical flow liner drop resistance conical pick and coal petrography cutting process design method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090429 Termination date: 20110612 |