CN102425414A - Special grooved pick structure for coal mining machine roller - Google Patents
Special grooved pick structure for coal mining machine roller Download PDFInfo
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- CN102425414A CN102425414A CN2011103732807A CN201110373280A CN102425414A CN 102425414 A CN102425414 A CN 102425414A CN 2011103732807 A CN2011103732807 A CN 2011103732807A CN 201110373280 A CN201110373280 A CN 201110373280A CN 102425414 A CN102425414 A CN 102425414A
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Abstract
The invention relates to a special grooved pick structure for a coal mining machine roller, which comprises a grooved pick body, a first hard alloy sheet and a second hard alloy sheet, wherein the grooved pick body, the first hard alloy sheet and the second hard alloy sheet are assembled into a whole through braze welding; a front angle of a grooved pick is 32 degrees; and the grooved pick body is provided with two or three steps. The part of the grooved pick of the two or the three steps which extends out of a pick seat is twisted backwards for 15 degrees relative to a pick handle and is installed by inclining 15 degrees forwards on the roller; and the grooved pick is fixed inside the pick seat through a pin. The grooving function of the roller is realized through shearing and through a stress centralized principle; the grooved pick is dominant on shearing and assisted by squeezing to substitute a conical pick which is widely adopted for breaking coal through squeeze tension both at home and abroad; and the coal breaking mechanism is fundamentally changed, so the special grooved pick structure has remarkable characteristics that the energy consumption is low and dust is less.
Description
Technical field
The present invention relates to a kind of fluting pick, the fluting pick structure of coal mining machine roller special use specifically, it mainly in coal mining machine roller revolution and feeding process, is opened on the coal petrography cutting surface and cuts out several narrow and darker kerfs.
Background technology
At present, the pick that domestic and international coal mining machine roller is used mainly can be divided into two types, and one type is flat pick; Claim radial pick again because its radially installs on coal mining machine roller, English, moral adopt more; Less employing is mainly used on the coal mining machine roller of middle-size and small-size power on the domestic market.Another kind of is tapered pick, and this kind pick does not have sharp cutting edge, and its head is coniform; So claim its tapered pick, this kind pick is 45 ° of installations on coal mining machine roller, can turn round voluntarily in the course of work; Its broken coal process is similar to pick splitting material, so claim its pick-shaped cutter in the world again.Many years ago, the former Soviet Union and Germany once used at the coal mining machine roller 45 sharp cutting edge were installed, non-rotating pick in the course of work, and this kind pick once was named as tangential pick.In the past do not have the relevant report that this type of flute profile is used the late nineteen eighties in a century again, for this reason in the industry standard of domestic pick, just list into the pick of two types of flat type pick and tapered picks.Mainly according to character, ore bed condition and the customer requirements of coal, still main pursuit is in the selection of pick pattern:
1. pick consumes low.The low cost of production that can not only reduce ton coal of pick consumption can also reduce the non-cutting time of changing pick, enhances productivity.
2. energy consumption is low.Energy consumption is low also to help to reduce cost of ton coal, reduces dynamo-electric accident and enhances productivity.
3. reduce the work plane dust and go out rate with raising lump coal.
The technical characterictic of tapered pick is that applicability is strong, because its no sharp cutting edge, so in the ature of coal condition of complicacy and ore bed during with hard mineral bump, its head is difficult for being crashed to pieces and lost efficacy.Tapered pick is because its 45 ° of installation on coal mining machine roller; For this reason with the increase of its cut degree of depth; The digit rate that the basal area of participating in pushing increases is slower, is applicable under the condition that the coal mining machine roller revolution is low, hauling speed is fast for this reason and uses, so be more suitable on the high-power coal cutter cylinder, adopting.Because coal-winning machine power both domestic and external is increasing, so tapered now pick has the trend of the flat pick of extensive replacement.However, the deadly defect of tapered pick is broken that dust in the coal process is big, jeopardizes miner's health and Safety of Coal Mine Production.This is because tapered pick does not have sharp cutting edge, and broken coal process is to form a great compact core (being pressed into the broken coal of powder) earlier, when interrupted supercharging; Fine coal produces tension force to diffusion all around; The tension force that is produced is during greater than the intensity of coal, and coal is broken, and in its broken moment; Crushed coal dust will fly upward by means of wind-force everywhere, so will reduce brokenly the compact core that dust in the coal process must manage to eliminate or reduce to be created in the broken coal process of machinery the pick head.How tapered pick is installed all on cylinder can't solve the compact core problem.Flat pick generally all has more sharp cutting edge, if having straight lip surface and greatly anterior angle greater than coal and carbide alloy angle of friction, in broken coal process, can realize shearing brokenly coal; And do not have bigger compact core and produce, so dust is also lower with energy consumption, still domestic each pick manufacturer is because of fail to solve the soldering problem of sheet carbide for a long time; And all adopt the column alloy to replace the sheet alloy; And the inclination angle of the ridge shape carbide alloy that is adopted is also less, so in its broken coal process, be main with extruding still, still has bigger compact core to produce; Dust is still bigger, and energy consumption can not have tangible reduction by more tapered pick yet.For cutting down the consumption of energy and the work plane dust, the lump coal that the raising machine is mined goes out rate, succeeds and extensive use at " the non-vane drum that is uniformly distributed with of coal-winning machine " of once winning coal industry scientific and technological progress second prize.
Is the technological core that name is called " coal-winning machine open flume type wedge type pick cylinder " in the process of coal mining machine roller revolution and feeding, can open earlier to cut out narrow and darker kerf? And can the coal petrography entity between its kerf be peeled off through bending immediately following pick thereafter? This is not a reverie; Because this wealthy Qin Siji mining industry academy academician Bie Long of the former Soviet Union, ripple Tianjin two people collaborate as far back as the beginning of the sixties " coal cutting principle " just set forth the mechanical and physical property of coal: its resistance to compression, shearing resistance, tensile strength are respectively 1:0.3:0.15; Be thoroughly to change coal crushing mechanism, realize with the shear tension being that main, extruding is the auxilliary broken coal mechanism of the extruding tension force of widely used tapered pick cylinder both at home and abroad that replaces now." coal-winning machine open flume type wedge type pick cylinder " formally listed world parent company brainstorm subject in for 8 years.Carried out repeatedly underground trials since more than 8 years; Before and after experienced fluting pick hard metal tip, the fluting pick tribulation that the pick carbide sheet bursts apart of losing, slot that comes off; This mainly is that the fluting pick is in the closed state cutting; Its cutting load is bigger, and technical barrier is broken one by one, moves to maturity the stage now.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, thereby provide a kind of coal mining machine roller special-purpose fluting pick structure, this pick can be confirmed separation according to the ature of coal condition, guarantees the stationarity of cylinder work; Energy consumption is low, dust is little, and lump coal goes out the rate height.
According to technical scheme provided by the invention; The special-purpose fluting pick structure of coal mining machine roller comprises fluting pick denticle, first hard metal tip, second hard metal tip, and said fluting pick denticle, first hard metal tip, second hard metal tip are formed one through soldering; The anterior angle of said fluting pick is 32 °; Said fluting pick denticle is provided with two or three steps.
As further improvement of the present invention, the tooth head two bottom sides face of said first hard metal tip and second hard metal tip leaves chip area respectively.
As further improvement of the present invention, the fluting pick of said two steps, its relative its tooth handle of part that stretches out toothholder is to 15 ° of angles of retrotorsion, and install at the 15 ° of angles that on cylinder, turn forward; Be fixed in the toothholder with pin.
As further improvement of the present invention, the fluting pick of said three steps, its relative its tooth handle of part that stretches out toothholder is to 15 ° of angles of retrotorsion, and install at the 15 ° of angles that on cylinder, turn forward; Be fixed in the toothholder with pin.
Evenly distribute in roll circumference as fluting pick of the present invention, with wedge type pick mounted in pairs.
Compared with present technology the present invention has the following advantages:
The present invention's pick of slotting can cut out dark 10～120 millimeters, wide 25～35 millimeters kerf at the cutting surface of coal petrography, and its fluting function is through shearing and concentrating principle to realize by means of stress; When fluting pick and wedge shape pick use on cylinder simultaneously; Be to be main with shear tension; Extruding is the auxilliary tapered pick cylinder that broken coal petrography can replace the broken coal of extruding tension force that extensively adopts now both at home and abroad that carries out; The radical change of broken coal mechanism makes it have that energy consumption is low, dust is little, lump coal goes out the high remarkable technical characterstic of rate.
Description of drawings
Fig. 1 is a structural front view of the present invention.
Fig. 2 is a structure vertical view of the present invention.
Fig. 3 is the fluting pick structural representation of the present invention's two steps.
Fig. 4 is the fluting pick structural representation of the present invention's three steps.
The specific embodiment
Following the present invention will combine the embodiment in the accompanying drawing to further describe:
Shown in Figure 1, comprise fluting pick denticle 1, first hard metal tip 2, second hard metal tip 3.
Said fluting pick denticle 1, first hard metal tip 2, second hard metal tip 3 are formed one through soldering; The anterior angle of said fluting pick is 30～35 °.Said fluting pick evenly distributes in roll circumference, with wedge type pick mounted in pairs, is fixed in the toothholder with pin.
Said fluting pick denticle 1 is provided with two or three steps.Shown in Figure 3, be the fluting pick of two steps.Shown in Figure 4, be the fluting pick of three steps.The axial spacing of said two steps or three steps is: 30～40 mm; The difference in height of step is: 30～40mm; The cutting edge width is: 20～30 mm, two side edges and main sword angle are: 87～89 °.
The present invention slots pick because the cutting load that bears is bigger, and work under bad environment is for this has relatively high expectations to its bulk strength.Carbon nickel (Ni) during the denticle material of its pick generally should adopt; Chromium (Cr); Molybdenum (Mo) steel is done, and the hard metal tip of cross-notching pick requires also higher, and it contains cobalt (Co) amount and generally is not less than 13%; Requirement to its granularity is also higher, because it shock-resistant, is wear-resistingly all had a higher requirement.Its pick production technology is:
Blanking → heating → base → moulding → side cut → normalizing → tempering → machine → check → blasting treatment → soldering hard metal tip → insulation → lonneal or oscillating aging processing → antirust processing → check → warehouse-in.
The present invention is the key element of " the novel coal mining machine roller with fluting function ".Its function is in coal mining machine roller revolution and feeding process, on the coal petrography cutting surface, opens and cuts out several narrow and darker kerfs.Generally be used for the fluting pick that middle-size and small-size coal mining machine roller adopts two steps.
Fluting pick in the present invention and the prior art differs widely, and its main distinction is following:
1. the essence variation has taken place in profile of tooth; The cutting pick head part that newly-designed fluting pick will stretch out toothholder is to the pick shank 15 ° of angles that rotate backward; So change and radially be installed as the 15 ° of angles installations that turn forward; 15 ° the toothholder endoporus of turning forward can produce a radial system power to pick, helps to prevent losing of pick.
2. changing shape, comparatively complicated to have the hard alloy head that stress concentrates be the unstressed concentrated sheet carbide head of simple shape.
3. taken into full account the chip removal problem of pick, the ridge part of former hard metal tip replaces with the pick parent, and the tooth head two bottom sides face of the support hard metal tip of cutting leaves chip area in front.
4. reduce its cutting load to greatest extent, general condition all replaces three step fluting picks with the fluting pick of two steps down; Having only extra heavy coal-winning machine to adopt three step fluting picks, mainly is under the high hauling speed situation, and the extension elongation of two step fluting picks is not enough.Not adopting like step is 4 ~ 6 fluting pick; Its reason is to reduce the shear load of fluting tooth; Even if be merely 0.3 times of the broken coal load of extruding because shear the load of broken coal, if the fluting pick is when surpassing four steps, and its cut load is greater than the live load of the broken coal of extruding.And the fluting pick always is in work under the closed state, and is too big for protecting the unsuitable live load of its operate as normal.
5. strengthened the anterior angle of fluting pick, the anterior angle of former fluting pick is 25 °.The slot true rake of pick of the present invention is 32 °, and the anterior angle of the pick of guaranteeing to slot makes it be in broken coal under the pure shear state, to avoid or to reduce to greatest extent the generation of compact core greater than the angle of friction of coal and carbide alloy.This not only is of value to the reduction dust, also is of value to the reduction cutting load.
6. the present invention's pick of slotting adopts lower silver, copper, zinc, the cadmium solder assembly welding carbide alloy of fusing point about 600 ° of C, and takes to eliminate after the soldering technical measures of welding stress.
In a word, by shearing broken coal, utilize stress to concentrate principle to leave narrow and darker kerf at the coal cutting surface, the fluting pick then is the key element of core technology.
Claims (4)
1. the special-purpose fluting pick structure of a coal mining machine roller; Comprise fluting pick denticle (1), first hard metal tip (2), second hard metal tip (3), said fluting pick denticle (1), first hard metal tip (2), second hard metal tip (3) are formed one through soldering; It is characterized in that: the anterior angle of said fluting pick is 30～35 °; Said fluting pick denticle (1) is provided with two or three steps.
2. the fluting pick structure that coal mining machine roller as claimed in claim 1 is special-purpose, it is characterized in that: the tooth head two bottom sides face of said first hard metal tip (2) and second hard metal tip (3) leaves chip area respectively.
3. the fluting pick structure that coal mining machine roller as claimed in claim 1 is special-purpose is characterized in that: the fluting pick of said two steps, and its relative its tooth handle of part that stretches out toothholder is to 15 ° of angles of retrotorsion, and install at the 15 ° of angles that on cylinder, turn forward.
4. the fluting pick structure that coal mining machine roller as claimed in claim 1 is special-purpose is characterized in that: the fluting pick of said three steps, and its relative its tooth handle of part that stretches out toothholder is to 15 ° of angles of retrotorsion, and install at the 15 ° of angles that on cylinder, turn forward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103732807A CN102425414A (en) | 2011-11-22 | 2011-11-22 | Special grooved pick structure for coal mining machine roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103732807A CN102425414A (en) | 2011-11-22 | 2011-11-22 | Special grooved pick structure for coal mining machine roller |
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| CN102425414A true CN102425414A (en) | 2012-04-25 |
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| CN2011103732807A Pending CN102425414A (en) | 2011-11-22 | 2011-11-22 | Special grooved pick structure for coal mining machine roller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244117A (en) * | 2013-05-21 | 2013-08-14 | 天地上海采掘装备科技有限公司 | Coal mining machine rocker arm with telescopic slotting mechanism |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4674802A (en) * | 1982-09-17 | 1987-06-23 | Kennametal, Inc | Multi-insert cutter bit |
| US4678237A (en) * | 1982-08-06 | 1987-07-07 | Huddy Diamond Crown Setting Company (Proprietary) Limited | Cutter inserts for picks |
| AU1267297A (en) * | 1996-02-29 | 1997-09-04 | Albert Daniel Dr Dawood | A coal and rock cutting pick |
| CN2470535Y (en) * | 2001-02-28 | 2002-01-09 | 张守柱 | Slotted wedge-typ pick drum of coal-cutting machine |
| DE20320161U1 (en) * | 2003-12-29 | 2004-03-04 | Dbt Gmbh | Chisel holder for a planer chisel of a coal or mining plane and planer chisel |
| CN2825948Y (en) * | 2004-09-28 | 2006-10-11 | 周崇义 | Radial mounting type tangential cutting pick |
| US20110248550A1 (en) * | 2010-04-13 | 2011-10-13 | Brook Hugh Knotts | Weld-on cast carbon steel roll crusher tooth having silver-brazed tungsten carbide inserts on wear surfaces |
| CN102383791A (en) * | 2011-11-15 | 2012-03-21 | 张守柱 | Shearer roller with slotting function |
-
2011
- 2011-11-22 CN CN2011103732807A patent/CN102425414A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4678237A (en) * | 1982-08-06 | 1987-07-07 | Huddy Diamond Crown Setting Company (Proprietary) Limited | Cutter inserts for picks |
| US4674802A (en) * | 1982-09-17 | 1987-06-23 | Kennametal, Inc | Multi-insert cutter bit |
| AU1267297A (en) * | 1996-02-29 | 1997-09-04 | Albert Daniel Dr Dawood | A coal and rock cutting pick |
| CN2470535Y (en) * | 2001-02-28 | 2002-01-09 | 张守柱 | Slotted wedge-typ pick drum of coal-cutting machine |
| DE20320161U1 (en) * | 2003-12-29 | 2004-03-04 | Dbt Gmbh | Chisel holder for a planer chisel of a coal or mining plane and planer chisel |
| CN2825948Y (en) * | 2004-09-28 | 2006-10-11 | 周崇义 | Radial mounting type tangential cutting pick |
| US20110248550A1 (en) * | 2010-04-13 | 2011-10-13 | Brook Hugh Knotts | Weld-on cast carbon steel roll crusher tooth having silver-brazed tungsten carbide inserts on wear surfaces |
| CN102383791A (en) * | 2011-11-15 | 2012-03-21 | 张守柱 | Shearer roller with slotting function |
Non-Patent Citations (1)
| Title |
|---|
| 雷玉勇等: "煤岩切割刀具几何参数的理论分析", 《煤矿机械》, no. 06, 25 June 1999 (1999-06-25) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244117A (en) * | 2013-05-21 | 2013-08-14 | 天地上海采掘装备科技有限公司 | Coal mining machine rocker arm with telescopic slotting mechanism |
| CN103244117B (en) * | 2013-05-21 | 2015-05-13 | 天地上海采掘装备科技有限公司 | Coal mining machine rocker arm with telescopic slotting mechanism |
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Application publication date: 20120425 |