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CN-121993200-A - Novel hard alloy tooth for cutting pick

CN121993200ACN 121993200 ACN121993200 ACN 121993200ACN-121993200-A

Abstract

The invention belongs to the technical field of roller bit, and particularly relates to a novel hard alloy tooth for cutting teeth, which comprises an integrally formed working body and an inlay, wherein at least one brazing groove is formed on the outer surface of the working body, a plurality of axially extending righting strips and a plurality of raised supporting blocks are circumferentially arranged on the outer surface of the inlay, and a pit is formed in the center of the bottom of the inlay. According to the invention, through optimizing the structural design of the hard alloy teeth, the axially extending centralizing strips and the raised supporting blocks are arranged on the inlay body, so that not only is the accurate centering and positioning of the alloy teeth and the tooth holes of the cutting teeth realized, but also the solder can flow and be distributed uniformly during brazing, and the tooth fixing force is greatly improved.

Inventors

  • CHEN BIN

Assignees

  • 天津立林钻头有限公司

Dates

Publication Date
20260508
Application Date
20260226

Claims (10)

  1. 1. Novel carbide tooth for pick, its characterized in that includes integrated into one piece's working body (1) and inlay body (2), wherein: At least one brazing groove (1-1) is formed in the outer surface of the working body (1); The outer surface of the inlay body (2) is provided with a plurality of axially extending righting strips (2-1) and a plurality of raised supporting blocks (2-2) along the circumferential direction; A pit (2-3) is arranged at the bottom center of the mosaic body (2).
  2. 2. The novel hard alloy tooth for cutting teeth according to claim 1, wherein the righting strips (2-1) are uniformly distributed on the outer surface of the inlay body (2) and used for radially positioning the alloy tooth during inlay so as to ensure the coaxiality of the alloy tooth and a cutting tooth hole.
  3. 3. The novel hard alloy tooth for cutting teeth according to claim 1, wherein the supporting blocks (2-2) are distributed on the outer surface of the insert body (2) and are used for supporting the alloy tooth during brazing, so that a uniform gap is kept between the insert body (2) and the tooth holes, and the brazing flux is uniformly distributed.
  4. 4. A new hard alloy tooth for cutting pick according to claim 1, characterized in that the righting strip (2-1) and the support block (2-2) are arranged alternately or at intervals in the axial and circumferential direction of the inlay (2).
  5. 5. A new hard metal tooth for cutting pick according to claim 1, characterized in that the height of the support block (2-2) is lower than the height of the righting strip (2-1).
  6. 6. The novel hard alloy tooth for cutting pick according to claim 1, wherein the brazing groove (1-1) is in an annular concave structure and is arranged at the joint of the working body (1) and the inlay body (2) for guiding the solder to flow into the gap between the inlay body (2) and the tooth hole.
  7. 7. A new hard alloy tooth for cutting pick according to claim 1, characterized in that the brazing groove (1-1) is a plurality of intermittently distributed concave structures.
  8. 8. A new hard alloy tooth for cutting pick according to claim 1, characterized in that the pit (2-3) is a circular or polygonal recess with a depth of 1/5 to 1/4 of the height of the inlay (2).
  9. 9. A new hard metal tooth for a cutting pick according to claim 1, characterized in that the radial dimension of the working body (1) is larger than the radial dimension of the inlay (2) such that the working body (1) covers the frontal area of the pick basic body in use.
  10. 10. The novel cemented carbide piece for cutting picks according to any one of claims 1 to 9, wherein the number of the righting strips (2-1) is three or more and the number of the support blocks (2-2) is three or more.

Description

Novel hard alloy tooth for cutting pick Technical Field The invention belongs to the technical field of oscillators, and particularly relates to a novel hard alloy tooth for a cutting pick. Background The cutting pick is a cutting tool commonly used in mineral excavation and pile foundation engineering, and is widely applied to the fields of coal mines, tunnel excavation, foundation construction and the like. The working principle is that the cutting head rotates and advances to wedge the cutting tips of the cutting teeth into the mineral layer or rock stratum, and the rock or mineral is peeled off from the parent body by utilizing the shearing, extrusion and crushing actions, so that the purposes of mining and crushing are realized. The working environment of the cutting pick is severe and bears high-strength impact, abrasion and thermal load, so that high requirements on wear resistance, impact resistance and service life are put forward. Currently, cemented carbide teeth for cutting teeth are mostly derived from cemented carbide teeth for roller cone drill bits. Alloy teeth for roller bit are usually inlaid in tooth holes in an interference press-in mode, and in order to ensure tooth fixing force, an inlaid body part of the alloy teeth is designed to be thicker so as to increase the contact area and friction force with a matrix. However, the pick is typically secured by brazing, rather than by an interference fit. The alloy tooth structure suitable for press-in fixation is directly applied to a cutting tooth fixed by brazing, and the problem that the structural design is unreasonable exists is that on one hand, expensive tungsten carbide materials are wasted by an oversized inlay body, and on the other hand, the brazing material is unevenly distributed in the brazing process, so that the tooth fixing effect is affected, and the service life is prolonged. In addition, the working body part of the hard alloy tooth for the existing cutting pick is relatively small, and is difficult to effectively protect the front abrasion-prone area of the cutting pick, so that early failure is prone to occurring in the use process of the cutting pick, and the mining efficiency and the safety are affected. Disclosure of Invention The invention aims to provide a novel hard alloy tooth for cutting teeth, which aims to solve the problems in the prior art. In order to achieve the aim, the invention provides the following technical scheme that the novel hard alloy tooth for the cutting pick comprises an integrally formed working body and an inlay, wherein: the outer surface of the working body is provided with at least one brazing groove; the outer surface of the mosaic body is provided with a plurality of axially extending righting strips and a plurality of raised supporting blocks along the circumferential direction; A pit is arranged at the center of the bottom of the mosaic. Preferably, the righting strips are uniformly distributed on the outer surface of the mosaic body and used for radially positioning the alloy teeth during mosaic, so that the coaxiality of the alloy teeth and the tooth holes of the cutting teeth is ensured. Preferably, the supporting blocks are distributed on the outer surface of the mosaic body and used for supporting alloy teeth during brazing, so that a uniform gap is kept between the mosaic body and the tooth holes, and the brazing flux is uniformly distributed. Preferably, the righting strips and the supporting blocks are alternately or alternately arranged along the axial direction and the circumferential direction of the mosaic body Preferably, the height of the support blocks is lower than the height of the righting strips. Preferably, the brazing groove is an annular concave structure and is arranged at the joint of the working body and the mosaic body and used for guiding the welding flux to flow into a gap between the mosaic body and the tooth hole. Preferably, the brazing groove is a plurality of concave structures which are discontinuously distributed. Preferably, the pit is a circular or polygonal recess having a depth of 1/5 to 1/4 of the height of the inlay. Preferably, the radial dimension of the working body is greater than the radial dimension of the insert, such that the working body covers a frontal area of the pick body in use. Preferably, the number of the righting strips is more than three, and the number of the supporting blocks is more than three. The invention has the advantages that through optimizing the structural design of the hard alloy teeth, the axially extending righting strips and the raised supporting blocks are arranged on the inlay body, the accurate centering and positioning of the alloy teeth and the tooth holes of the cutting teeth are realized, the solder can flow in and distribute evenly during brazing, the tooth fixing force is greatly improved, the volume of the working body is larger than that of the inlay body, the most easily worn matrix area on the front