阅读说明：本技术 一种新型顶管机用中心鱼尾刀 (Novel center fishtail cutter for push bench ) 是由 卢庆亮 李伟 刘国威 于 2019-09-23 设计创作，主要内容包括：本发明公开了一种新型顶管机用中心鱼尾刀,包括刀体、合金刀座、硬质合金及耐磨层,所述刀体与刀盘的连接部位设有坡口,其上部设计有用于安装合金刀座的沟槽,所述合金刀座通过焊接的方式与刀体连接在一起,其两侧开有合金安装槽；所述硬质合金通过银钎焊的方式与合金刀座连接在一起、分布在合金刀座的左右两侧,硬质合金刀刃沿转动轨迹朝向刀具切削的迎土面,硬质合金的背部的合金刀座用于受力方向的支撑。本发明通过控制硬质合金刀刃的轨迹分布来实现消除切削盲区的目的,通过将硬质合金刀刃左右排布在刀体的两侧,从而避免了相邻轨迹硬质合金刀刃之间的干涉,使得既满足无盲区切削又实现了相邻轨迹刀刃之间的互不影响。(The invention discloses a novel central fishtail cutter for a push bench, which comprises a cutter body, an alloy cutter holder, hard alloy and a wear-resistant layer, wherein a groove is formed in the connecting part of the cutter body and the cutter head, a groove for mounting the alloy cutter holder is designed in the upper part of the cutter body, the alloy cutter holder is connected with the cutter body in a welding mode, and alloy mounting grooves are formed in two sides of the alloy cutter holder; the hard alloy is connected with the alloy tool apron through silver brazing and distributed on the left side and the right side of the alloy tool apron, the hard alloy cutting edge faces the soil facing surface of the tool for cutting along the rotating track, and the alloy tool apron on the back of the hard alloy is used for supporting in the stress direction. According to the invention, the aim of eliminating the cutting blind area is realized by controlling the track distribution of the hard alloy blades, and the hard alloy blades are distributed on the two sides of the cutter body from left to right, so that the interference between the hard alloy blades with adjacent tracks is avoided, the non-blind area cutting is met, and the mutual influence between the blades with adjacent tracks is realized.)

1. The utility model provides a novel push bench is with central fishtail sword which characterized in that: the alloy cutting tool comprises a tool body (1), an alloy tool apron (2), hard alloy (3) and a wear-resistant layer (4), wherein a groove (11) is formed in the connecting part of the tool body (1) and the tool apron, a groove 12 for mounting the alloy tool apron (2) is formed in the upper part of the tool body, the alloy tool apron (2) is connected with the tool body (1) in a welding mode, and alloy mounting grooves (21) are formed in two sides of the alloy tool apron; the hard alloy (3) is connected with the alloy tool apron (2) in a silver brazing mode and distributed on the left side and the right side of the alloy tool apron (2), the cutting edge of the hard alloy (3) faces the soil-facing surface of the cutter cutting along the rotating track, and the alloy tool apron (2) on the back of the hard alloy (3) is used for supporting in the stress direction.

2. The novel central fishtail cutter for the push bench of claim 1 is characterized in that: the wear-resistant layer (4) is formed by surfacing of a wear-resistant welding rod, the thickness of the wear-resistant layer is 3-5 mm, and the distance from the wear-resistant welding rod to the alloy installation groove (21) is 3-5 mm.

3. The novel central fishtail cutter for the push bench of claim 1 is characterized in that: the size of the groove (11) is C19.

4. the novel central fishtail cutter for the push bench of claim 1 is characterized in that: the contact ratio between adjacent carbide cutting edges is 2 mm.

5. The novel central fishtail cutter for the push bench of claim 1 is characterized in that: the cutter body (1) and the alloy cutter holder (2) are made of Q345B.

6. The novel central fishtail cutter for the push bench of claim 1 is characterized in that: YG13C is selected as the hard alloy (3).

7. The novel center fishtail cutter for push bench according to any of claims 1-6, characterized in that: except for the welding part, the whole body is subjected to paint spraying and rust preventing treatment.

Technical Field

The invention relates to a novel central fishtail cutter for a push bench, and belongs to the field of tunnel construction.

Background

The shield machine and the pipe jacking machine are special engineering machinery for tunneling, and are large-scale tunnel automatic construction equipment with a complex structure, which integrates mechanical, electrical, hydraulic, fluid, optical, sensing and information technologies. The cutter head is an important component in the mechanism and is used for cutting soil on the tunnel face, but the linear velocity of the cutter head is reduced along with the smaller distance from the center of the cutter head, and the theoretical central linear velocity is zero, so that certain difficulty is caused for cutting the soil, other types of cutters are not easy to install, the currently applied central fishtail cutter cannot completely eliminate the cutting blind area, and meanwhile, the high-hardness alloy installed on the cutter head is easy to break.

Disclosure of Invention

the invention aims to solve the technical problem of providing a novel central fishtail cutter for a push bench aiming at the defects in the prior art.

in order to solve the technical problem, the invention provides a novel central fishtail cutter for a push bench, which comprises a cutter body, an alloy cutter holder, hard alloy and a wear-resistant layer, wherein a groove is formed in the connecting part of the cutter body and the cutter head, a groove for mounting the alloy cutter holder is designed in the upper part of the cutter body, the alloy cutter holder is connected with the cutter body in a welding mode, and alloy mounting grooves are formed in two sides of the alloy cutter holder; the hard alloy is connected with the alloy tool apron through silver brazing and distributed on the left side and the right side of the alloy tool apron, the hard alloy cutting edge faces the soil facing surface of the tool for cutting along the rotating track, and the alloy tool apron on the back of the hard alloy is used for supporting in the stress direction.

The wearing layer adopts wear-resisting electrode build-up welding, and its thickness is 3 ~ 5mm, and the distance from the alloy mounting groove is 3 ~ 5 mm.

The size of the groove is C19.

The contact ratio between adjacent carbide cutting edges is 2 mm.

The cutter body and the alloy cutter holder are made of Q345B.

YG13C is selected as the hard alloy.

Except for the welding part, the whole body is subjected to paint spraying and rust preventing treatment.

Has the advantages that: according to the invention, the aim of eliminating the cutting blind area is realized by controlling the track distribution of the hard alloy blades, and the hard alloy blades are distributed on the two sides of the cutter body from left to right, so that the interference between the hard alloy blades with adjacent tracks is avoided, the non-blind area cutting is met, and the mutual influence between the blades with adjacent tracks is realized.

Drawings

FIG. 1a is a schematic front view of the center fishtail knife structure of the present invention;

FIG. 1b is a schematic top view of the center fishtail knife structure of the present invention;

FIG. 1c is a schematic side view of the center fishtail knife of the present invention;

FIG. 2a is a schematic front view of the alloy tool holder and the cemented carbide block of the present invention;

FIG. 2b is a schematic side view of the combination of the alloy tool holder and the cemented carbide piece of the present invention;

FIG. 3 is a schematic view of the installation of the center fishtail cutter of the invention on the cutter head;

FIG. 4 is a diagram showing the trajectory of the center fishtail according to the present invention.

In the figure: the tool comprises a tool body 1, an alloy tool apron 2, hard alloy 3, a wear-resistant layer 4, a groove 11, a groove 12 and an alloy mounting groove.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

FIG. 1a is a schematic front view of the center fishtail knife of the present invention.

FIG. 1b is a schematic top view of the center fishtail knife structure of the present invention.

FIG. 1c is a schematic side view of the center fishtail knife of the invention.

The invention provides a novel central fishtail cutter for a push bench, which comprises a cutter body 1, an alloy cutter holder 2, hard alloy 3 and a wear-resistant layer 4.

The connecting part of the cutter body 1 and the cutter head is provided with a groove 11, the upper part of the connecting part is provided with a groove 12 for installing the alloy cutter holder 2, the alloy cutter holder 2 is connected with the cutter body 1 in a welding mode, and alloy installing grooves 21 are formed in two sides of the connecting part.

fig. 2a is a front view of the combination of the alloy holder and the cemented carbide block of the present invention.

FIG. 2b is a schematic side view of the combination of the alloy holder and the cemented carbide block of the present invention.

The hard alloy 3 is connected with the alloy tool apron 2 in a silver brazing mode and distributed on the left side and the right side of the alloy tool apron 2, the cutting edge of the hard alloy 3 faces the soil-facing surface of the cutting tool along the rotating track, and the alloy tool apron 2 on the back of the hard alloy 3 is used for supporting in the stress direction.

The wearing layer 4 adopts the hardfacing electrode build-up welding, and its thickness is 3 ~ 5mm, and the distance from alloy mounting groove 21 is 3 ~ 5 mm.

The groove 11 has a size of C19.

the contact ratio between adjacent carbide cutting edges is 2 mm.

The material of the cutter body 1 and the alloy cutter holder 2 is Q345B.

YG13C is selected as the hard alloy 3.

except for the welding part, the whole body is subjected to paint spraying and rust preventing treatment.

Fig. 3 is a schematic view showing the installation of the center fishtail cutter of the invention on the cutter head.

The central fishtail cutter is arranged at the central position of the cutter head, and one cutter head is arranged, so that the cutting efficiency of the soil body at the center of the cutter head is improved, and the generation of a central soil cutting blind area is effectively avoided.

Fig. 4 shows the cutting path of the blade of the center fishtail knife of the invention.

As can be shown in the figure, the soil body is cut sufficiently without blind areas.

According to the invention, the aim of eliminating the cutting blind area is realized by controlling the track distribution of the hard alloy blades, and the hard alloy blades are distributed on the two sides of the cutter body from left to right, so that the interference between the hard alloy blades with adjacent tracks is avoided, the non-blind area cutting is met, and the mutual influence between the blades with adjacent tracks is realized.

The above-described embodiments of the invention are intended to be illustrative only and are not intended to be limiting, as all changes that come within the scope of or equivalence to the invention are intended to be embraced therein.