CN201857969U

CN201857969U - Abrasion-resistant cutter

Info

Publication number: CN201857969U
Application number: CN201020571151XU
Authority: CN
Inventors: 吕增和
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-10-15
Filing date: 2010-10-15
Publication date: 2011-06-08
Anticipated expiration: 2020-10-15

Abstract

The utility model discloses an abrasion-resistant cutter which comprises a cutter body and a hard alloy tool bit, wherein the cutter body comprises a cutter bit and a cutter handle, the hard alloy tool bit is embedded in the front end of the cutter bit, a cylindrical raised part is arranged at the front end of the cutter bit, the hard alloy tool bit is provided with an inner cavity matched with the cylindrical raised part of the cutter bit, and the cylindrical raised part of the cutter bit is sub-packaged in the inner cavity of the hard alloy tool bit and welded together. The abrasion-resistant cutter can prevent the hard alloy tool bit from shedding due to asynchronous abrasion of the hard alloy tool bit and the cutter body, enable the abrasion of the cutter to be uniform and prolong the service life of the cutter.

Description

Wear resistant cutting pick

Technical field

The utility model relates to mining machinery field, colliery, relates in particular to a kind ofly in the mining machinery course of work of colliery, is installed on the mining machinery cutting mechanism of colliery, is used for the wear resistant cutting pick of cut coal petrography.

Background technology

Pick-like bit of the prior art is to be adopted soldering and made by pick body and carbide bit two parts, and carbide bit is embedded in the cutting pick head front end shrinkage pool.The pick body is general adopt in the carbon high strength alloy steel process through modifier treatment, matrix mostly is tempered martensite or secondary troostite, hardness about 40HRC, impact toughness more than 50J/cm2, material manufacturings such as domestic normal employing 42CrMo, 35CrMo.Carbide bit is by the high temperature resistant tungsten carbide of higher hardness and the iron group metal cobalt with higher-strength and toughness, carry out proportioning according to pick cutting coal petrography character,, sintering repressed in specialized factory forms, the carbide alloy code name of domestic normal employing is YG11C, YG8C etc., and the hole of dress carbide bit is generally than the big 0.1～0.3mm of carbide bit on the pick body.Copper base or money base scolder are adopted in soldering, and copper parent metal brazing temperature is 880～950 ℃, and money base is 600～700 ℃, but the money base scolder is more expensive, the domestic copper parent metals that adopt more, and its trade mark is 105 manganese strong solders.Soldering generally adopts dewatering borax to carry out in atmosphere, and easy oxidation during owing to soldering easily makes weld seam generation pore and reduces soldering strength.Existing domestic existing employing Vacuum Soldering Technology has improved the intensity and the quality of soldering greatly.

For a long time, the expert has carried out number of research projects to pick-shaped cutter both at home and abroad, and the patent of declaring this respect is also more.In numerous patented technologies, mostly all be at cutting pick head shape, pick handle material, around cutting pick head, increase technological measures such as coating and welding, be the scuff resistance that improves cutting pick head and pick handle.

Up to the present, although these measures all do not have development of revolutionary significance to improving some corresponding raising and change of cutting-gear life.Because of measure in any case, method all can not make the hardness of pick body hardness near carbide bit, and always less than carbide bit hardness, then the wearing and tearing of pick body top containing carbide bit want fast than carbide bit.This wearing and tearing come out the carbide bit cylinder quickly, and the matrix of soldering and periphery is more and more lower, carbide bit is exposed and come off.The failure mode of this pick generally accounts for about 90% of total failure mode, and to target cuts such as hard granite, hard limestones the time, this kind situation is more outstanding, so the life problems of existing pick has become the difficult problem that industry is interior.

Summary of the invention

The purpose of this utility model is to provide a kind of wear resistant cutting pick, mainly solve in the work of development machine and coal-winning machine, expose the alloy column part around the carbide alloy of pick after the steel matrix experience wear, soldering highly reduces, and problem such as come off after pick is impacted, cutting-gear life is short easily.

The technical solution of the utility model is:

Wear resistant cutting pick, comprise pick body, carbide bit, described pick body is made of cutting pick head and pick handle, described carbide bit is embedded in the cutting pick head front end, described cutting pick head front end is provided with the columnar projections part, described carbide bit is provided with the inner chamber that partly is complementary with the cutting pick head columnar projections, and described cutting pick head columnar projections partly is contained in the inner chamber of carbide bit, welds together.

The interior cavity wall of described carbide bit is shape of threads, described cutting pick head columnar projections partly is the face of cylinder, the screw thread that matches with the inner chamber internal thread is arranged on its face, the carbide bit spinning is on the cutting pick head columnar projections part face of cylinder, by full inner chamber of the scolder of fusing and thread pitch, its condensation is solidified as a whole.

The utility model wear resistant cutting pick; changed traditional pick and taked to strengthen the mode of thinking of its hardness for improving carbide bit cutting pick head abrasion resistance on every side; overturned the immanent structure form of its original pick; carbide bit and the cutting pick head that is worn part are designed to crown one; real cutting pick head then is set in the interior bottom of crown carbide bit; the wearing and tearing of base steel pick body have been avoided; improve the abrasion resistance of pick body; protected soldering not frayed effectively; carbide bit and pick body are worn and torn synchronously; this has improved the life-span of pick greatly; realize permanently effective reliable cut, the operating efficiency of heading equipment and Lian Cai equipment is improved greatly.

The beneficial effects of the utility model are: wear resistant cutting pick is that carbide bit and former pick body containing carbide bit partial design are become a crown integral body, avoided the wearing and tearing of carbide bit and pick body asynchronous and carbide bit is come off, make the pick wearing and tearing evenly, prolong the wear-out life of pick.

Description of drawings

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

Sequence number among the figure: 1, cutting pick head, 2, carbide bit, 3, the pick handle, 4, the columnar projections part, 5, inner chamber.

The specific embodiment

Shown in accompanying drawing 1, a kind of wear resistant cutting pick, comprise the pick body, carbide bit 2, described pick body is made of cutting pick head 1 and pick handle 3, described cutting pick head 1 front end is provided with columnar projections part 4, described carbide bit 2 is provided with the inner chamber 5 that is complementary with cutting pick head 1 columnar projections part 4, inner chamber 5 inwalls of described carbide bit 2 are shape of threads, described cutting pick head 1 columnar projections part 4 is the face of cylinder, the screw thread that matches with inner chamber 5 internal threads is arranged on its face, carbide bit 2 spinnings by full inner chamber of the scolder of fusing and thread pitch, are solidified as a whole its condensation on cutting pick head 1 columnar projections part 4 faces of cylinder.

Along with the expansion gradually of development machine working range, when harder half coal petrography of cut, in order to guarantee higher reliability and application life, the pick that has the major diameter alloy cutter head is in recent years more and more reused especially.The pick of domestic present use, the alloy cutter head diameter mostly is the geological conditions of 15～22mm according to China's coal petrography greatly, for the more reasonable pick that uses economically, novel development machine is suitably selected the bigger slightly pick of alloy cutter head diameter for use, and the utility model can be accomplished 25～38mm with the alloy cutter head diameter.In addition, the cone angle of wear resistant cutting pick alloy cutter head also is the factor that influences the pick performance.In general, cone angle is big more, and cutting resistance is also big more, and cut efficient is low, but intensity is good; Cone angle is more little, and cutting resistance is also more little, is convenient to cut coal petrography, but intensity difference.So for softer coal and soft rock, cone angle is chosen between 65 °～85 ° usually; And for half coal petrography (hard rock) of Polodyakonov coefficient coefficient f 〉=8, cone angle will reach between 90 °～102 °.

The utility model carbide bit is wrapped in cutting pick head, thereby makes soldering not be subjected to any wearing and tearing, participates in cut directly to avoid the pick body, has guaranteed that carbide bit is without prejudice with the mechanical strength that the pick body is connected, and has really prolonged the life-span of pick.

Embodiment is just for the ease of understanding the technical solution of the utility model; do not constitute restriction to the utility model protection domain; every interior any simple modification, equivalent variations and modification of perhaps according to technical spirit of the present utility model above scheme being done that does not break away from technical solutions of the utility model all still belongs within the utility model protection domain.

Claims

1. wear resistant cutting pick, comprise pick body, carbide bit (2), described pick body is made of cutting pick head (1) and pick handle (3), described carbide bit (2) is embedded in cutting pick head (1) front end, it is characterized in that: described cutting pick head (1) front end is provided with columnar projections part (4), described carbide bit (2) is provided with the inner chamber (5) that is complementary with cutting pick head (1) columnar projections part (4), described cutting pick head (1) columnar projections part (4) is contained in the inner chamber (5) of carbide bit (2), welds together.

2. wear resistant cutting pick according to claim 1, it is characterized in that: inner chamber (5) inwall of described carbide bit (2) is shape of threads, described cutting pick head (1) columnar projections part (4) is the face of cylinder, the screw thread that matches with inner chamber (5) internal thread is arranged on its face, carbide bit (2) spinning is on cutting pick head (1) columnar projections part (4) face of cylinder, by full inner chamber of the scolder of fusing and thread pitch, its condensation is solidified as a whole.