CN210370648U - Cutter in cutter head of shield tunneling machine - Google Patents
Cutter in cutter head of shield tunneling machine Download PDFInfo
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- CN210370648U CN210370648U CN201921255975.3U CN201921255975U CN210370648U CN 210370648 U CN210370648 U CN 210370648U CN 201921255975 U CN201921255975 U CN 201921255975U CN 210370648 U CN210370648 U CN 210370648U
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- cutter
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- cutter head
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- blade
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Abstract
After the shield machine enters a composite stratum for tunneling, due to the fact that various stratums exist in the tunnel face, the determination of the reasonable rotating speed of the cutter head is difficult to determine. Too high or too low cutter head rotating speed can cause the risk of too fast damage of the cutter of the shield machine. The cutter is used as a final executing component for tunneling of the shield tunneling machine, and the service life of the cutter is directly related to the tunneling efficiency of the shield tunneling machine. Based on this design cutter in shield constructs quick-witted blade disc, including cutter body, tool bit and blade, the diameter of cylinder hole on the tool bit is 0.03 ~ 0.08mm bigger than the diameter of blade, and cutter body and tool bit pass through the welding rod welding, and the blade welding is in the cylinder hole of tool bit. And CrC wear plates with the thickness of 12mm are welded on two sides of the cutter head. Two welding seams are arranged between the cutter head and the CrC wear-resistant plate, one welding seam uses 7018 welding rods, the height of a fillet weld is 6mm, the other welding seam uses 309 surfacing welding rods, and the height of the fillet weld is 6 mm. The other two sides of the cutter head are provided with CrC wear-resistant surfacing layers with the thickness of 1.5mm, and the surface of the cutter head is provided with CrC wear-resistant surfacing layers with the thickness of 3.2 mm.
Description
Technical Field
The utility model belongs to shield constructs quick-witted accessory field, especially a cutter in shield constructs quick-witted blade disc.
Background
The shield tunnel often encounters a composite stratum with soft upper part and hard lower part formed by slightly weathered or middle weathered stratum invasion in the process of tunneling a strongly weathered stratum. But is limited by the spacing of geological boreholes, so that certain blind areas exist in geological profiles along the tunnel. When the shield tunneling machine tunnels in a strongly weathered stratum, the tunneling speed is generally higher, and the rotation speed of the cutter head is higher. Therefore, when the shield machine suddenly enters a composite stratum without preparation, the violent change of the stratum in the tunnel face can apply huge impact load to the cutter on the cutter head which rotates rapidly, and the cutter is easy to break instantaneously. In addition, when the shield machine tunnels in a single stratum, the tunneling parameters of the shield machine can be determined by the stratum conditions of the excavation face. However, after the shield tunneling machine enters a composite stratum for tunneling, due to the fact that various stratums exist in the tunnel face, the determination of the reasonable rotating speed of the cutter head is difficult to determine. Too high or too low cutter head rotating speed can cause the risk of too fast damage of the cutter of the shield machine. The cutter is used as a final executing component for tunneling of the shield tunneling machine, and the service life of the cutter is directly related to the tunneling efficiency of the shield tunneling machine.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides a cutter in shield constructs quick-witted blade disc, the technical scheme of adoption as follows:
the utility model provides a cutter in shield constructs quick-witted blade disc, includes cutter body, tool bit and blade, and the diameter ratio of cylinder hole is 0.03 ~ 0.08mm bigger than the diameter of blade on the tool bit, and cutter body and tool bit pass through the welding rod welding, and the blade welding is in the cylinder hole of tool bit.
Furthermore, 12mm thick CrC antifriction plate has been welded to the both sides of tool bit.
Furthermore, two welding lines are arranged between the tool bit and the CrC wear-resistant plate.
Furthermore, 7018 welding rods are used for one welding line, the height of the fillet weld is 6mm, and 309 surfacing welding rods are used for the other welding line, and the height of the fillet weld is 6 mm.
Furthermore, the other two sides of the cutter head are provided with CrC wear-resistant layers with the thickness of 1.5mm, and the surface of the cutter head is provided with CrC wear-resistant layers with the thickness of 3.2 mm.
Furthermore, the height range of the blade exposed out of the cutter body during welding is 2.5-3 mm.
Furthermore, the blade is made of hard alloy.
Furthermore, the hardness range of the wear-resisting plate is HRC 50-55.
Compared with the prior art, the beneficial effects of the utility model reside in that: the diameter of the cylindrical hole of the cutter head is 0.03-0.08mm larger than that of the cylindrical body of the blade, so that the welding liquid for flame brazing can flow to the bottom of the cutter hole, and the blade and the cutter head are completely welded firmly. The welding of the wear-resistant layer of the cutter is reasonable, the service life of the cutter is prolonged, the construction period is saved for tunneling projects, and the efficiency is improved.
Drawings
FIG. 1 is a schematic view of the structure of the cutting tool of the present invention;
fig. 2 is a schematic view of another view angle structure of the cutter of the present invention.
Description of reference numerals:
the cutting tool comprises a tool bit-1, a blade-2, flame brazing-3, a first surface CrC wear-resistant layer-4, a CrC wear-resistant plate-5, a second surface CrC wear-resistant layer-6, a tool body-7, a first welding line-8, a second welding line-9 and a third surface CrC wear-resistant layer-10.
Detailed Description
In this embodiment, the cutter is a tearing cutter in a cutter head of a shield tunneling machine, the outer dimension is 310mm × 146mm × 76mm, as shown in fig. 1 and fig. 2, the cutter comprises a cutter body 7 with a height of 180mm, a cutter head 1 and a cutter blade 2, the diameter of a cylindrical hole in the cutter head 1 is 0.03-0.08mm larger than that of the cutter blade 2, the cutter body 7 and the cutter head 1 are welded through a stainless steel welding rod, and the cutter blade 2 is welded in the cylindrical hole of the cutter head 1. And CrC wear plates 5 with the thickness of 12mm are welded on two sides of the cutter head 1. Two welding seams are arranged between the tool bit 1 and the CrC wear plate 5. Wherein 7018 welding rods are used for the second welding seams 9, the height of the fillet weld is 6mm, 309 surfacing welding rods are used for the first welding seams 8, and the height of the fillet weld is 6 mm. The other two sides of the cutter head 1 are provided with a second surface CrC wear-resistant layer 6 with the thickness of 1.5mm, and the surface of the cutter head 1 is provided with a first surface CrC wear-resistant layer 4 and a third surface CrC wear-resistant layer 10 with the thickness of 3.2 mm.
The technical principles of the present invention have been described above with reference to specific embodiments, and these descriptions are only for explaining the technical principles of the present invention, and should not be construed as limiting the scope of the present invention in any way. Based on this explanation, those skilled in the art can imagine that other embodiments of the present invention will fall within the scope of the present invention without any inventive effort.
Claims (8)
1. The utility model provides a cutter in shield constructs quick-witted blade disc, includes cutter body, tool bit and blade, its characterized in that, the diameter of cylinder hole on the tool bit is 0.03 ~ 0.08mm bigger than the diameter of blade, and cutter body and tool bit pass through the welding rod welding, and the blade welding is in the cylinder hole of tool bit.
2. The cutter in a shield tunneling machine cutterhead according to claim 1, wherein 12mm thick CrC wear plates are welded to both sides of the cutter head.
3. The cutter in a shield tunneling machine cutterhead according to claim 2, wherein the wear plate has a hardness in the range of HRC 50-55.
4. The cutter in a shield tunneling machine cutterhead according to claim 2, wherein there are two weld seams between the cutter head and said CrC wear plate.
5. The cutter in the cutter head of the shield tunneling machine according to claim 4, wherein one welding seam uses 7018 welding rods and the fillet height is 6mm, and the other welding seam uses 309 surfacing welding rods and the fillet height is 6 mm.
6. The cutter in a shield tunneling machine cutterhead according to claim 2, wherein the other two sides of the cutter head have a CrC wear layer thickness of 1.5mm, and the surface of the cutter head has a CrC wear layer thickness of 3.2 mm.
7. The cutter in the cutter head of the shield tunneling machine according to claim 1, wherein the height of the cutter blade exposed out of the cutter body during welding is in the range of 2.5 to 3 mm.
8. The cutter in a shield tunneling machine cutterhead according to claim 1, wherein the blades are cemented carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921255975.3U CN210370648U (en) | 2019-08-05 | 2019-08-05 | Cutter in cutter head of shield tunneling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921255975.3U CN210370648U (en) | 2019-08-05 | 2019-08-05 | Cutter in cutter head of shield tunneling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210370648U true CN210370648U (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921255975.3U Active CN210370648U (en) | 2019-08-05 | 2019-08-05 | Cutter in cutter head of shield tunneling machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN210370648U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449680A (en) * | 2019-08-05 | 2019-11-15 | 辽宁三三工业有限公司 | Cutter and welding method in a kind of cutter head of shield machine |
-
2019
- 2019-08-05 CN CN201921255975.3U patent/CN210370648U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449680A (en) * | 2019-08-05 | 2019-11-15 | 辽宁三三工业有限公司 | Cutter and welding method in a kind of cutter head of shield machine |
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