CN205654341U

CN205654341U - Strengthened cutting tooth

Info

Publication number: CN205654341U
Application number: CN201620446165.6U
Authority: CN
Inventors: 杨岗
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-05-17
Filing date: 2016-05-17
Publication date: 2016-10-19
Anticipated expiration: 2026-05-17

Abstract

The utility model relates to a strengthened cutting tooth, include the base member and locate the cutting teeth on the base member, its cutting teeth is polycrystalline diamond composite tooth, the base member lower extreme is equipped with the jump ring groove. Furthermore, easily wear and tear to distinguish and be equipped with the wearing layer in base member upper portion, its wearing layer adopt argon arc weld welding technique with the build -up welding of tungsten carbide welding rod in the pick base member district of easily wearing and tearing, and completely the cover on the surface of base member. The wearing layer is cyclic annular welding, and build -up welding tungsten carbide layer superposes for every layer in proper order, and its thickness increases in proper order. By adopting the above scheme in the utility model for pick life, impact resistance and wearability improve greatly, and have the advantage of high strength, high wearing feature, high impact resistance toughness.

Description

A kind of Enhanced cutting pick

Technical field

This utility model belongs to tunnelling machine, coal-winning machine and shield machine field, is specifically related to a kind of novel Enhanced cutting pick.

Background technology

In the prior art, development machine, coal-winning machine and shield machine are widely used in various colliery and tunnel piercing；Cutterhead is the critical piece of development machine, coal-winning machine and shield machine, and pick is fixed on cutterhead by toothholder, and pick generally uses hard alloy crown (referred to as hard alloy pick), mostly is the profile of circular cone, and is directly anchored on corresponding base.In practical work process, cutterhead by pick cutting rock, is main stressed member in the way of impact.

Wherein, when running into the higher rock stratum of hardness, by bigger shock loading and friction, hard alloy pick thereon abrasion is very fast, has had a strong impact on the work efficiency of road heading machinery and coal-cutting machinery.

Its failure mode of the common pick of tradition mainly has two kinds:

One abrasion rapidly being as hard alloy crown, pick rust, it is difficult to cutting effective to rock formation, reach to a certain degree when the pick on whole cutterhead weares and teares, drivage efficiency will be remarkably decreased；

Two is owing to pick matrix is arranged on toothholder; toothholder to pick matrix without radial constraint; pick matrix can be around toothholder central rotation; pick matrix wearability is low, and in work, pick matrix surrounding is worn and torn prior to hard alloy pick point, when heavy wear; pick matrix loses the support protective effect to crown; so that crown is the most completely worn out, entirety is come off, cut tooth losing efficiency, need impact strength and the more preferable pick of wearability in therefore producing.

Utility model content

In order to solve above-mentioned technical problem, this utility model provides the Enhanced cutting pick that a kind of impact resistance is strong, wearability is high.

The scheme that the above-mentioned technical problem of this utility model solution is taked is as follows:

A kind of Enhanced cutting pick, including matrix and the cutting tooth being located on matrix, it is characterised in that: described cutting tooth is polycrystal diamond composite teeth；The bottom of described matrix underpart is provided with the jump-ring slot fixed with pick base；Described matrix top is provided with wearing layer.

Further, described pick matrix top wearing layer welds in the form of a ring, and wherein every layer of Tungsten Carbide Surfacing layer is sequentially overlapped, and its thickness increases successively.

Further, described wearing layer is the district easy to wear using argon arc welding solder technology that tungsten carbide filler rod heap is welded in matrix.

Further, the wearing layer thickness in the matrix district easy to wear of described pick is 2～8mm, and sector width easy to wear is 20～40mm.

Further, described wearing layer covers on the full surface in the district easy to wear on described pick matrix.

Further, described polycrystal diamond composite teeth is made up of diamond composite layer and cemented carbide base.

Further, a diameter of the 16～25mm of described polycrystal diamond composite teeth；The thickness of described diamond composite layer is 0.2～3mm.

Further, described cutting tooth and matrix use soldering tech integrally welded.

The shortcoming of tradition pick:

1, cutting tooth wearability, impact resistance, intensity is poor.

2, matrix top wearing layer ratio is relatively thin, and wearing layer consistency of thickness, does not has wearing layer to wrap up at pick front end face；

3, the crackle that the wearing layer surface of traditional pick has the shape depth not etc., causes the intensity of wearing layer and utilization ratio to reduce.The wearing layer of traditional pick is to use microplasma powder weld deposition or the tungsten carbide wear resistant layer of laser melting coating welding technology.During forming wearing layer, owing to variations in temperature is relatively big, the wearing layer surface of formation there will be substantial amounts of crackle, and its size shape degree of depth is all without identical.Pick is in real work, and by powerful impulsive force, on wearing layer, original crackle can be increasing, causes wearing layer gradually to come off along crackle.

The advantage of this utility model pick:

1, cutting tooth is polycrystal diamond composite teeth, and it has higher wearability, higher impact resistance and higher intensity, is significantly larger than hard alloy its service life.

2, matrix top wearing layer welds in the form of a ring, and every layer of Tungsten Carbide Surfacing layer is sequentially overlapped, and its thickness increases successively, and fully wrapped around pick front end face, has more preferable wearability and impact resistance.

3, this utility model pick wearing layer surface does not has crackle.Substantially increase intensity and the utilization rate of wearing layer.This utility model pick wearing layer is to use argon arc welding solder technology tungsten carbide filler rod built-up welding to be formed, and preheats matrix before welding, after having welded, matrix is used Insulation, and its solder side does not haves crackle.

After this utility model takes such scheme, substantially increase pick service life, impact resistance and wearability, and there is high intensity, high-wearing feature, the advantage of high impact-resistant toughness, improve work efficiency.

Accompanying drawing explanation

Below in conjunction with the accompanying drawings this utility model is described in detail, so that above-mentioned advantage of the present utility model is definitely.

Fig. 1 is the structural representation of this utility model Enhanced cutting pick；

Fig. 2 is the structural representation of utility model Enhanced cutting pick polycrystal diamond composite teeth；

Fig. 3 is the structural representation of tradition pick；

Fig. 4 is the structural representation that utility model Enhanced cutting pick matrix machine adds semi-finished product；

Fig. 5 is the structural representation of this utility model Enhanced cutting pick welding wearing layer；

Fig. 6 is that the matrix machine of this utility model Enhanced cutting pick adds the structural representation cutting socket groove.

Detailed description of the invention

Below in conjunction with the accompanying drawings and embodiment, detailed description of the invention of the present utility model is described in further detail.Following example are used for illustrating this utility model, but are not limited to scope of the present utility model.

As described in Figure 1, being the structural representation of the Enhanced cutting pick of one embodiment of this utility model, comprising: matrix 1-3 and the cutting tooth being located on matrix, described cutting tooth is polycrystal diamond composite teeth 1-1；District easy to wear, described matrix top is provided with wearing layer 1-2, and described matrix lower end is provided with jump-ring slot 1-4.

More specifically, described matrix is the matrix blank using forging technology, adds semi-finished product at the machine formed as shown in Figure 4 through lathe in machining.In figure, the step of 4-1 is welding wearing layer processing.

Further, the processing of described wearing layer 1-2 uses argon arc welding technology, and tungsten carbide filler rod heap is welded in the district easy to wear of pick；In welding process, utilize special frock to make matrix semi-finished product rotate along axis and utilize argon arc-welding built-up welding tungsten carbide filler rod simultaneously, and before welding matrix is preheated, after having welded, matrix is used Insulation.Step 4-1 in Fig. 4 provides the face of covering of tungsten carbide for welding wearing layer, and step 4-1 can allow the tungsten carbide being in molten condition be fused into completely with matrix and be integrated.Guarantee thickness and the width of the tungsten carbide wear resistant layer of built-up welding.The abrasion resistant effect in matrix district easy to wear is strengthened with this.

Obtaining the wearing layer of matrix as shown in Figure 5, wherein 5-1 is tungsten carbide wear resistant layer.The wearing layer thickness in pick matrix district easy to wear is 2～8mm, and it is the most thickening that its thickness arrives matrix top from bottom to top, and district easy to wear overlay width is the vertical dimension of 1-2 in 20～40mm(i.e. Fig. 1).

Wherein, illustrating Fig. 2, described cutting tooth is polycrystal diamond composite teeth, comprising: diamond composite layer 2-1, cemented carbide base 2-2.A diameter of the 16 of polycrystal diamond composite teeth～25mm

Diamond composite layer 2-1 thickness is 0.2～3mm；Described polycrystal diamond composite teeth replaces hard alloy crown as digging tool cut rock.

In particular, described polycrystal diamond composite teeth uses soldering tech as the cutting tooth of pick with matrix, polycrystal diamond composite teeth is put into cutting socket groove 6-1 integrally welded with matrix.

Described pick and the jump-ring slot 1-4 that bottom is provided with and pick base is connected that toothholder connected mode is matrix underpart.

Last it is noted that the foregoing is only preferred embodiment of the present utility model, it is not limited to this utility model, although this utility model being described in detail with reference to previous embodiment, for a person skilled in the art, technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent.

All within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.It will be understood by those skilled in the art that specific descriptions above are intended merely to explain the purpose of this utility model, be not intended to limit this utility model.Protection domain of the present utility model is limited by claim and equivalent thereof.

Claims

1. an Enhanced cutting pick, including matrix and the cutting tooth being located on matrix, it is characterised in that described cutting tooth is polycrystal diamond composite teeth；

The bottom of described matrix underpart is provided with the jump-ring slot fixed with pick base；

Described matrix top is provided with wearing layer.

Enhanced cutting pick the most according to claim 1, it is characterised in that described wearing layer uses argon arc welding welding that tungsten carbide filler rod heap is welded in pick matrix district easy to wear.

Enhanced cutting pick the most according to claim 2, it is characterised in that described matrix top wearing layer welds in the form of a ring, and every layer of described Tungsten Carbide Surfacing layer is sequentially overlapped, and its thickness increases successively.

Enhanced cutting pick the most according to claim 3, it is characterised in that the wearing layer thickness in the matrix district easy to wear of described pick is 2～8mm, and sector width easy to wear is 20～40mm.

Enhanced cutting pick the most according to claim 1, it is characterised in that described wearing layer covers on the full surface in the district easy to wear on described pick matrix.

Enhanced cutting pick the most according to claim 1, it is characterised in that described polycrystal diamond composite teeth is made up of diamond composite layer and cemented carbide base.

Enhanced cutting pick the most according to claim 6, it is characterised in that a diameter of the 16 of described polycrystal diamond composite teeth～25mm；The thickness of described diamond composite layer is 0.2～3mm.

Enhanced cutting pick the most according to claim 1, it is characterised in that described cutting tooth and matrix use soldering tech integrally welded.