CN210440028U

CN210440028U - Novel heading machine cutting head

Info

Publication number: CN210440028U
Application number: CN201921071020.2U
Authority: CN
Inventors: 吴佳梁; 郎国军; 史成建; 刘金荣; 刘兴利
Original assignee: Wuxi Huahan Energy Equipment Technology Co ltd
Current assignee: Wuxi Huahan Energy Equipment Technology Co ltd
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2020-05-01
Anticipated expiration: 2029-07-10

Abstract

The utility model discloses a novel entry driving machine cutterhead belongs to cantilever type entry driving machine, even adopts machine, the anchor driving machine technical field. The welding has stock guide and toothholder on the head body, install the pick on the toothholder, stock guide and toothholder are arranged to the spiral of spherical crown section along the head body with the mode of helix, all be provided with the wearing layer on head body, stock guide, toothholder and the pick. This entry driving machine cutterhead passes through 3D and prints combined material laser vibration material disk manufacturing process, improves the position surface hardness that the cutterhead easily wears to HRC70 ~ HRC80, and the wearability can improve more than 10 times than HRC60 wear-resisting steel, and has high impact strength to make the whole life-span of entry driving machine cutterhead improve more than 1 times, effectively improve the economic practicality of complete machine.

Description

Novel heading machine cutting head

Technical Field

The utility model relates to a novel entry driving machine cutterhead belongs to cantilever type entry driving machine, even adopts machine, the anchor driving machine technical field.

Background

Along with development of the tunneling machine towards the direction of heaviness, a broken roadway gradually tends to be full rock and hard rock, and the fault rate of a cutting head serving as a breaking mechanism is increased, so that the tunneling speed of the roadway is influenced, and the economic practicability of the whole machine is influenced. Therefore the utility model discloses analyze the incentive of each trouble, provided corresponding solution, improved the reliability of this part, provide the reference for cutterhead design from now on.

The cutting head is a direct part of the development machine for realizing rock breaking. The structure mainly comprises a cutting head body, a material guide plate, a tooth holder, cutting teeth and other accessories. During operation, the coal rock is crushed by the pickaxe-shaped cutting pick arranged on the cutting head. At present, the cutterhead life-span is too short (3 times overhaul life-span is less than 2 years) under abominable operating mode, and main failure mode includes: wear and seat deformation, etc.

The abrasion is mainly expressed as abrasion of the cutting tooth and the tooth holder, abrasion of the large end of the head body and the guide plate. The abrasion of the cutting tooth is mainly represented as eccentric abrasion, and the abrasion of the tooth holder is mainly represented as the abrasion of the side surface of the tooth holder and the abrasion of the contact surface of the tooth holder and the cutting tooth; the wear of the head body is mainly characterized in that the whole large end face is lightened and thinned, and the size is reduced; the abrasion of the guide plate is mainly shown as thinning of the plate thickness and sharp edges.

The deformation of the tooth holder is mainly represented by the fracture of the tooth holder and the deformation of the binding surface of the tooth holder and the cutting tooth.

Analysis of wear causes: the working condition of the cutting head is very severe, and the cutting head is required to break rock and be corroded by underground water; especially in the working condition of sweeping the bottom, bulk cargo is piled up in the bottom of the roadway, the cutting head is in the mixture of coal rock and sewage for a long time, and the head body is severely abraded due to the friction in the sewage caused by the high linear velocity hinge, especially the large end of the head body, and the highest linear velocity is seriously abraded. The wear of the cutting pick occurs mainly during rock breaking. The pick can rotate in the tooth holder theoretically, but in the practical use process, due to the action of dust slurry, the cutting tooth is easy to block and cannot rotate, and the pick tooth is unqualified (if an alloy head is easy to fall off), so that eccentric wear is caused. Once the cutting pick is eccentrically worn but not replaced in time, the tooth holder is worn along with the side face.

Analyzing the cause of the deformation of the tooth seat: the cutting head is greatly impacted when breaking rocks, the tooth handle and the tooth holder are in clearance fit, the combined surface of the cutting tooth and the tooth holder is frequently impacted, and finally the cutting tooth is crushed due to insufficient surface hardness of the tooth holder.

Disclosure of Invention

To the above problem, the to-be-solved technical problem of the utility model is to provide a novel entry driving machine cutterhead.

The utility model discloses a heading machine cutterhead, it contains head body, stock guide, toothholder, pick and wearing layer, the welding has stock guide and toothholder on the head body, install the pick on the toothholder, stock guide and toothholder are arranged to spherical cap section spiral along the head body with the mode of helix, all be provided with the wearing layer on head body, stock guide, toothholder and the pick.

Preferably, the material feeding part in 2/3 th from the tail end of the head body covers the wear-resistant layer by adopting a metal laser 3D printing technology, the tail end of the head body is provided with an end face, the wear-resistant layer is covered by adopting the metal laser 3D printing technology, the bonding between the wear-resistant layer and the head body is better than that of a welding mode, and the wear resistance of the head body is greatly improved.

Preferably, the material feeding surface and the outer arc surface of the material guide plate are subjected to 3D printing technical treatment, the grains of the wear-resistant layer are arranged along the material feeding direction, and the wear-resistant layer made of the particle reinforced gradient composite material is combined with a stress control process to obtain a wear-resistant ceramic layer with the thickness of 3 mm.

Preferably, metal laser 3D printing is carried out on the combination surface of the tooth holder and the cutting tooth and the periphery of the side face of the tooth holder, the laser 3D printing heat input is small, the forming is fast, the heat affected zone is small, the deformation is zero, the hardness of a printing layer is 70 HRC-80 HRC, the impact strength is high, and the working condition requirement of the heading machine for cutting hard rock is met.

Preferably, the cutting pick performs wear-resistant treatment on the vulnerable part at the periphery of the hard alloy by using a metal laser 3D printing technology, and the metal ceramic is organically combined to form a cutting pick 4 with excellent obdurability and high-temperature wear resistance without pores, cracks and embrittlement.

Compared with the prior art, the beneficial effects of the utility model are that: this entry driving machine cutterhead passes through 3D and prints combined material laser vibration material disk manufacturing process, improves the position surface hardness that the cutterhead easily wears to HRC70 ~ HRC80, and the wearability can improve more than 10 times than HRC60 wear-resisting steel, and has high impact strength to make the whole life-span of entry driving machine cutterhead improve more than 1 times, effectively improve the economic practicality of complete machine.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a side view of the present invention;

FIG. 3 is a schematic view of the tooth holder structure of the present invention;

fig. 4 is a schematic view of the cutting pick structure of the present invention.

Reference numerals: the cutting tool comprises a head body 1, a material guide plate 2, a tooth holder 3, a cutting tooth 4 and a wear-resistant layer 5.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 4, the following technical solutions are adopted in the present embodiment: it contains head body 1, stock guide 2, toothholder 3, pick 4 and wearing layer 5, and the welding has stock guide 2 and toothholder 3 on the head body 1, install pick 4 on the toothholder 3, stock guide 2 and toothholder 3 are arranged to the spherical cap section spiral along head body 1 with the mode of helix, all are provided with wearing layer 5 on head body 1, stock guide 2, toothholder 3 and the pick 4.

The material part is walked in 2/3 height from head body 1 tail end, adopts metal laser 3D printing technique to cover wearing layer 5, and the terminal end stands the terminal surface, adopts metal laser 3D printing technique to cover wearing layer 5, and wearing layer 5 and head body 1 associativity are better than the welding mode, make head body 1 wear resistance promote by a wide margin.

And (3) carrying out 3D printing technical treatment on the feeding surface and the outer arc surface of the material guide plate 2, arranging the grains of the wear-resistant layer 5 along the feeding direction, and combining a stress control process to obtain a wear-resistant ceramic layer with the thickness of 3 mm.

The toothholder 3 and the cutting tooth 4 are combined on the surface and the periphery of the side face of the toothholder 3, metal laser 3D printing is carried out, the laser 3D printing heat input is small, the forming is fast, the heat affected zone is small, the deformation is zero, the printing layer hardness is 70 HRC-80 HRC, the shock resistance is high, and the working condition requirement of cutting hard rock of the heading machine is met.

The cutting teeth 4 are subjected to wear-resistant treatment on the vulnerable parts at the periphery of the hard alloy by using a metal laser 3D printing technology, and the metal ceramic is organically combined to form a cutting tooth 4 with no air holes, no cracks and no embrittlement, so that the cutting tooth 4 has excellent obdurability and high-temperature wear resistance.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel entry driving machine cutterhead which characterized in that: it contains head body (1), stock guide (2), toothholder (3), pick (4) and wearing layer (5), the welding has stock guide (2) and toothholder (3) on head body (1), install pick (4) on toothholder (3), stock guide (2) and toothholder (3) are arranged to the spherical crown section spiral along head body (1) with the mode of helix, all be provided with wearing layer (5) on head body (1), stock guide (2), toothholder (3) and pick (4).