CN211370400U - Spherical tooth hobbing cutter and shield machine - Google Patents
Spherical tooth hobbing cutter and shield machine Download PDFInfo
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- CN211370400U CN211370400U CN201921625533.3U CN201921625533U CN211370400U CN 211370400 U CN211370400 U CN 211370400U CN 201921625533 U CN201921625533 U CN 201921625533U CN 211370400 U CN211370400 U CN 211370400U
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Abstract
The utility model provides a ball tooth hobbing cutter and shield structure machine relates to the machining and makes the field. The device comprises a hob base body and spherical teeth; the spherical teeth are embedded on the hob base body; the outside parcel of button has the protective sheath, the protective sheath is used for the protection the button. The utility model discloses a ball tooth hobbing cutter begins the work back, and the outside protective sheath of ball tooth is worn and torn very fast and falls, exposes inside ball tooth to guarantee ball tooth hobbing cutter's wearability and sharpness, the protective sheath has still alleviated ball tooth hobbing cutter working stress simultaneously and has to the effect of ball tooth, has reduced the ball tooth fracture that causes because of stress cycle in the ball tooth hobbing cutter use, takes off the tooth phenomenon.
Description
Technical Field
The utility model relates to a machining makes technical field, particularly, relates to a ball tooth hobbing cutter and shield constructs machine.
Background
The ball tooth hob usually directly cold-embeds the ball teeth into the hob base body, the service conditions of the hob cutter in the tunneling process are very complex, the ball teeth bear higher pressure stress, shearing stress and impact load, in addition, the ball teeth often encounter harder mineral aggregate and changes of chilling and heating temperatures in the use process, the ball teeth are easy to break, crack and fall, and the cutter is damaged or cannot be tunneled.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a ball tooth hobbing cutter and shield construct machine, it can solve the complicated in service environment of ball tooth among the ball tooth hobbing cutter better because of the fracture that the bearing stress leads to and the problem that drops.
The embodiment of the utility model is realized like this:
a spherical gear hob comprises a hob base body and spherical gears;
the spherical teeth are embedded on the hob base body;
the outside parcel of button has the protective sheath, the protective sheath is used for the protection the button.
In a preferred embodiment of the present invention, the protective sleeve has a toughness greater than that of the ball gear hob.
In a preferred embodiment of the present invention, the spherical teeth of the spherical-teeth hob are cemented carbide spherical teeth.
In a preferred embodiment of the present invention, in the above-mentioned ball-tooth hob, a ratio of a diameter of the ball tooth to a height of the ball tooth is 0.7-1.
In the preferred embodiment of the present invention, the protective sleeve is a steel sleeve.
In a preferred embodiment of the present invention, the thickness of the steel sleeve is 2-5 mm.
In a preferred embodiment of the present invention, the joint strength of the steel sleeve and the joint surface of the spherical teeth hob is 350-450 MPa.
In a preferred embodiment of the present invention, the ratio of the size of the spherical teeth exposed radially along the hob base to the total length of the spherical teeth is greater than 0.5.
In a preferred embodiment of the present invention, the number of the spherical teeth hob is plural;
and a plurality of spherical teeth are uniformly distributed on the hob base body.
A shield constructs machine, it includes above-mentioned ball tooth hobbing cutter.
The embodiment of the utility model provides a beneficial effect is: the utility model provides a spherical tooth hob which comprises a hob base body and spherical teeth; the spherical teeth are embedded on the hob base body; the outside parcel of button has the protective sheath, the protective sheath is used for the protection the button. The utility model discloses a ball tooth hobbing cutter begins the work back, and the outside protective sheath of ball tooth is worn and torn very fast and falls, exposes inside ball tooth to guarantee ball tooth hobbing cutter's wearability and sharpness, the protective sheath has still alleviated ball tooth hobbing cutter working stress simultaneously and has to the effect of ball tooth, has reduced the ball tooth fracture that causes because of stress cycle in the ball tooth hobbing cutter use, takes off the tooth phenomenon.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a ball-tooth hob provided in an embodiment of the present invention;
fig. 2 is a partial sectional view of a ball-tooth hob provided by the embodiment of the present invention.
In the figure:
100-hob base body; 200-spherical teeth; 300-protective sleeve; 400-bonding surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
First embodiment
Referring to fig. 1 and 2, the present embodiment provides a ball-and-teeth hob, which includes a hob base 100 and a ball-and-teeth 200;
the spherical teeth 200 are embedded on the hob base body 100;
the outside parcel of button 200 has protective sheath 300, protective sheath 300 is used for protecting button 200.
The utility model discloses a ball tooth hobbing cutter begins the work back, and the outside protective sheath 300 of ball tooth 200 is worn and torn very fast and falls, exposes inside ball tooth 200 to guarantee ball tooth hobbing cutter's wearability and sharpness, protective sheath 300 has alleviated ball tooth hobbing cutter working stress to ball tooth 200's effect by the in-process that wears and teares, has reduced the ball tooth 200 fracture and the tooth phenomenon of taking off that causes because of stress cycle in the ball tooth hobbing cutter use.
In the above technical solution, further, the toughness of the protective sleeve 300 is greater than that of the button 200.
The protective sleeve 300 is used for protecting the spherical teeth 200, and the spherical teeth 200 can relieve the working stress of the spherical teeth hob on the spherical teeth 200, so that the phenomena of cracking and tooth falling of the spherical teeth 200 caused by stress circulation in the use process of the spherical teeth hob are reduced. Since the toughness of the material is larger, the ductility is better, and the brittleness is lower, the toughness of the material of the protective sleeve 300 in this embodiment is greater than that of the button 200, and the effect of the protective sleeve 300 on relieving the action of the button hob working stress on the button 200 is better.
In the above technical solution, further, the brittleness of the protective sleeve 300 is less than that of the button 200.
In order to achieve a better protection effect, the brittleness of the protective sleeve 300 is less than that of the button 200 in the embodiment, because the button 200 cracks and disengages due to stress circulation during the use of the button hob.
In the above technical solution, further, the button 200 is a cemented carbide button.
The hard alloy spherical tooth has excellent wear resistance and impact toughness due to the high hardness of the hard alloy, has higher drilling speed compared with similar products, and is widely applied to equipment such as petroleum drilling, mining machinery, road maintenance, coal drilling, civil buildings, snow and snow removing plows and the like.
In the above technical solution, further, a ratio of the diameter of the button 200 to the height of the button 200 is 0.7-1.
In order to improve the overall strength of the ball-tooth hob, the ratio of the diameter of the ball tooth 200 to the height of the ball tooth 200 in this embodiment is 0.7-1. Specifically, the button 200 includes a hemispherical portion and a cylindrical portion, the hemispherical portion being disposed at one end of the cylindrical portion, and a diameter of the hemispherical portion being equal to a diameter of the cylindrical portion. In the present embodiment, the diameter of the button 200 is the diameter of the cylindrical portion (also the diameter of the hemispherical portion), and the height of the button 200 is the height of the cylindrical portion.
In the above technical solution, further, the protective sleeve 300 is a steel sleeve.
The steel sleeve has the characteristics that the toughness is higher than that of hard alloy, and the brittleness is lower than that of the hard alloy, so that the protective sleeve 300 serving as the spherical tooth 200 has a good protective effect, the action of the working stress of the spherical tooth hob on the spherical tooth 200 can be effectively relieved, and the phenomena of cracking and tooth release of the spherical tooth 200 caused by stress circulation in the use process of the spherical tooth hob are reduced.
In the technical scheme, further, the thickness of the steel sleeve is 2-5 mm.
After the spherical gear hob starts to work, the steel sleeve needs to be abraded, so that the hard alloy is exposed, and the abrasion resistance and the sharpness of the spherical gear hob are guaranteed. If the steel sleeve is too thick, the steel sleeve needs to be worn for a long time, and the spherical tooth hob needs to reach sharpness for a long time, so that the overall machining efficiency is possibly influenced; if the steel sleeve is too thin, the time required for the steel sleeve to be worn away is short, and the protection effect of the steel sleeve on the spherical tooth 200 is poor, so in the embodiment, the thickness of the steel sleeve is preferably 2-5 mm, and within the thickness range, the steel sleeve can play a role in protecting the spherical tooth 200 and can ensure the machining efficiency.
In the above technical solution, further, the bonding strength of the bonding surface 400 between the steel sleeve and the button 200 is 350-450 MPa.
In this embodiment, the material of the button 200 is hard alloy, the button hob is prepared in advance to form a steel sleeve for coating the button 200 during the preparation process, then the powder of the button 200 of the hard alloy is put into the steel sleeve, and the composite button 200 is prepared according to the conventional hot-pressing sintering method of the button 200 of the hard alloy, wherein the joint surface 400 where the steel sleeve of the composite button 200 and the button 200 are combined has a certain strength, in this embodiment, the preferred joint strength of the joint surface 400 is 401MPa, which can effectively prevent the button of the hard alloy from being peeled during the working process.
In the above technical solution, further, a ratio of a radially exposed dimension of the button 200 along the hob base 100 to an overall length of the button 200 is greater than 0.5.
After the composite spherical tooth 200 is prepared, the prepared hard alloy composite spherical tooth 200 is cold-inlaid in the hob base body 100, and then the preparation of the spherical tooth hob is completed. The overall length of the button 200 includes the length dimension into the hob base 100 and the dimension radially outward of the hob base 100. In this embodiment, the ratio of the radially exposed dimension of the hob base 100 to the total length of the button 200 is greater than 0.5, that is, the length dimension entering the hob base 100 is greater than the radially exposed dimension of the hob base 100, and the button 200 has good structural strength and is not easy to fall off.
In the above technical solution, further, the number of the spherical teeth is plural;
and a plurality of spherical teeth are uniformly distributed on the hob base body.
A plurality of spherical teeth are uniformly distributed on the hob base body, so that stress can be balanced, and the service life of the whole spherical tooth hob is prolonged.
Second embodiment
The embodiment provides a shield machine, which includes the spherical tooth hob in the first embodiment, so that the technical scheme in the first embodiment also belongs to the embodiment, and is not described herein again.
Since the shield tunneling machine in this embodiment includes the spherical-tooth hob in the first embodiment, all the advantages of the spherical-tooth hob in the first embodiment are obtained.
To sum up, the utility model discloses a ball tooth hobbing cutter begins the work back, and the outside protective sheath 300 of ball tooth 200 is worn and torn very fast and falls, exposes inside ball tooth 200 to guarantee ball tooth hobbing cutter's wearability and sharpness, protective sheath 300 has still alleviated ball tooth hobbing cutter working stress simultaneously and has cracked ball tooth 200 to ball tooth 200, has reduced the ball tooth 200 fracture that causes because of stress cycle in the ball tooth hobbing cutter use, takes off the tooth phenomenon.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A spherical tooth hob is characterized by comprising a hob base body and spherical teeth;
the spherical teeth are embedded on the hob base body;
the protective sleeve wraps the outside of the spherical tooth and is used for protecting the spherical tooth;
the spherical teeth are hard alloy spherical teeth;
the ratio of the diameter of the ball teeth to the height of the ball teeth is 0.7-1;
the protective sleeve is a steel sleeve.
2. The button hob of claim 1, wherein the toughness of the protective sleeve is greater than the toughness of the button.
3. The button hob of claim 1, wherein the steel jacket has a thickness of 2-5 mm.
4. The ball gear hob according to claim 3, characterized in that the bonding strength of the bonding surface of the steel sleeve and the ball gear is 350-450 MPa.
5. The button hob of claim 4, wherein the ratio of the size of the button exposed in the radial direction of the hob base to the total length of the button is greater than 0.5.
6. The button hob of claim 1, characterized in that the number of buttons is plural;
and a plurality of spherical teeth are uniformly distributed on the hob base body.
7. A shield tunneling machine comprising a spherical-tooth hob according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921625533.3U CN211370400U (en) | 2019-09-26 | 2019-09-26 | Spherical tooth hobbing cutter and shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921625533.3U CN211370400U (en) | 2019-09-26 | 2019-09-26 | Spherical tooth hobbing cutter and shield machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211370400U true CN211370400U (en) | 2020-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921625533.3U Active CN211370400U (en) | 2019-09-26 | 2019-09-26 | Spherical tooth hobbing cutter and shield machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211370400U (en) |
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2019
- 2019-09-26 CN CN201921625533.3U patent/CN211370400U/en active Active
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