CN214303840U

CN214303840U - Hobbing cutter suitable for uneven soft or hard stratum

Info

Publication number: CN214303840U
Application number: CN202120081504.6U
Authority: CN
Inventors: 夏生辉; 夏开良
Original assignee: Dongguan Huifeng Tunnel Machinery Equipment Co ltd
Current assignee: Dongguan Huifeng Tunnel Machinery Equipment Co ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-09-28
Anticipated expiration: 2031-01-13

Abstract

The utility model discloses a hobbing cutter suitable for uneven stratum of hardness, including the arbor, the cutter body, the cutter ring, the alloy tooth, the left end lid, the right-hand member lid, bearing and screens retaining ring, the arbor transversely runs through the inside of cutter body, the bearing is installed between arbor and cutter body, the cutter ring is spacing to be fixed in the outside of cutter body through the screens retaining ring of side, the alloy tooth is equipped with a plurality of and inlays the hole site of the cutting edge outward flange of cutter ring uniformly, the left end lid is located the one end of cutter body, the right-hand member lid is located the other end of cutter body, the outside at the cutting edge position of cutter ring is equipped with wear-resisting composite bed, wear-resisting composite bed is by the WC granule cladding welding layer that sets gradually from outer to inner, diamond polycrystal layer and high manganese steel layer constitute. The utility model has the advantages of simple structure, reasonable in design, this wear-resisting composite bed's adhesive force is good, can make the hobbing cutter have advantages such as high strength, high rigidity, high abrasion, has prolonged the life of hobbing cutter, has reduced the change number of times of hobbing cutter, has reduced construction cost, is applicable to the uneven stratum of hardness.

Description

Hobbing cutter suitable for uneven soft or hard stratum

Technical Field

The utility model relates to a hobbing cutter technical field, more specifically say, relate to a hobbing cutter suitable for uneven stratum of hardness.

Background

With the continuous development of cities in China, subways play an important role in relieving urban traffic pressure, shield machines are more and more widely applied in subway construction at present, and hobbing cutters are cutters used for tunneling on the shield machines. However, the wear resistance of the cutter ring of the existing hob is poor, and the condition that the cutter ring fails prematurely easily occurs, so that the hob needs to be frequently replaced, time and labor are wasted, and the cost is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned defect among the prior art, provide a hobbing cutter that the wearability is strong and be applicable to soft or hard uneven stratum.

For realizing above-mentioned mesh, the utility model provides a hobbing cutter suitable for uneven stratum of hardness, including arbor, cutter body, cutter ring, alloy tooth, left end lid, right-hand member lid, bearing and screens retaining ring, the arbor transversely runs through the inside of cutter body, the bearing is installed between arbor and cutter body, the cutter ring passes through the spacing outside of fixing at the cutter body of screens retaining ring of side, the alloy tooth is equipped with a plurality of and inlays uniformly in the hole site of the cutting edge outward flange of cutter ring, the left end lid is located the one end of cutter body, the right-hand member lid is located the other end of cutter body, the outside at the cutting edge position of cutter ring is equipped with wear-resisting composite bed, wear-resisting composite bed is deposited the welding layer by the WC granule that sets gradually from outer inside, diamond polycrystal layer and high manganese steel layer are constituteed.

Preferably, in the above aspect, the content of WC particles in the WC particle deposited layer is 2000 g or more, and the diameter of the WC particles is 1 to 3 mm.

Preferably, in the above technical solution, the diamond polycrystalline layer is formed by sintering diamond particles and a binder at high temperature and high pressure.

Preferably, in the above technical solution, the material of the cutter ring is medium carbon high alloy structural steel 40 CrNiMoA.

Preferably, in the above technical solution, the depth of the alloy teeth embedded in the cutter ring is 30 to 50 mm.

Preferably, in the above-described aspect, the width of the blade edge of the cutter ring is 25mm to 50 mm.

Preferably, in the above technical solution, the center-to-center distance between two adjacent alloy teeth is 2.5 times the diameter of a single alloy tooth.

Preferably, in the above technical solution, oil seals are respectively disposed between the left end cover and the cutter body and between the right end cover and the cutter body.

Preferably, in the above-described aspect, the cutter shaft is provided with retaining blocks located outside the left end cover and outside the right end cover, respectively.

Preferably, in the above technical solution, two bearings are provided, and a bearing spacer washer is provided between the two bearings.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model has the advantages of simple structure, reasonable in design, the outside at the cutting edge position of cutter ring is equipped with wear-resisting composite bed, this wear-resisting composite bed is deposited by the WC granule that sets gradually from outer toward interior and welds the layer, diamond polycrystalline layer and high manganese steel layer and constitute, this wear-resisting composite bed's adhesive force is good, can make the hobbing cutter have advantages such as high strength, high rigidity, high wear resistance, the life of hobbing cutter has been prolonged, the change number of times of hobbing cutter has been reduced, construction cost is reduced, be applicable to the uneven stratum of hardness.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a hob suitable for a stratum with uneven hardness provided by an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a wear-resistant composite layer according to an embodiment of the present invention.

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. 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.

Referring to fig. 1, an embodiment of the present invention provides a hob suitable for a stratum with uneven hardness, which includes a hob shaft 1, a hob body 2, a hob ring 3, alloy teeth 4, a left end cover 5, a right end cover 6, a bearing 7, a clamping retainer ring 8, and the like, and each component of the embodiment is described in detail below with reference to the accompanying drawings.

The cutter shaft 1 transversely penetrates through the inside of the cutter body 2, the bearing 7 is installed between the cutter shaft 1 and the cutter body 2, the cutter ring 3 is fixed outside the cutter body 2 in a limiting mode through the clamping check ring 8 on the side edge, the alloy teeth 4 are provided with a plurality of parts and are uniformly embedded in hole positions on the outer edge of a cutting edge of the cutter ring 3, the left end cover 5 is located at one end of the cutter body 2, and the right end cover 6 is located at the other end of the cutter body 2.

Preferably, the cutter ring 3 can be made of medium-carbon high-alloy structural steel 40CrNiMoA, and compared with a common cutter ring made of 42CrMo, the toughness of the cutter ring is improved by 50 percent and is more 6-10 times of that of a common cutter ring (H13).

Preferably, the depth of the cutter ring 3 inlaid with the alloy teeth 4 can be 30-50 mm (preferably 36mm), the impact resistance of the alloy teeth 4 can be improved, and the tooth falling phenomenon cannot occur. Wherein, the center distance between two adjacent alloy teeth 4 can be 2.5 times of the diameter of a single alloy tooth 4.

The width of the cutting edge of the cutter ring 3 can be 25 mm-50 mm, and the cutter ring has high compressive strength and good impact resistance.

As shown in fig. 1 and 2, a wear-resistant composite layer 9 is disposed outside the blade edge portion of the cutter ring 3, and the wear-resistant composite layer 9 may be composed of a WC particle deposited layer 91, a diamond polycrystalline layer 92, and a high manganese steel layer 93, which are sequentially disposed from outside to inside.

The content of WC particles (namely tungsten carbide particles) in the WC particle deposited welding layer 91 is more than 2000 g, and the diameter of the WC particles is 1-3 mm. The WC particle deposited welding layer has high bonding strength, no crack and greatly improved wear resistance.

The diamond polycrystalline layer 92 can be formed by sintering diamond particles and a binder at high temperature and high pressure, and has the characteristics of high strength, high hardness and high wear resistance.

The HRC of the high manganese steel layer 93 can reach 65-80. The surface roughness of the high-manganese steel layer can be set to Ra3.2, and the high-manganese steel layer 93 is used as a transition layer, so that the whole wear-resistant layer can be firmly bonded with the cutter ring.

As shown in fig. 1, two bearings 7 may be provided, and a bearing spacer washer 12 is provided between the two bearings 7.

In addition, oil seals 10 are respectively arranged between the left end cover 5 and the cutter body 2 and between the right end cover 6 and the cutter body 2. The cutter shaft 1 is respectively provided with a retaining block 11 positioned on the outer side of the left end cover 5 and the outer side of the right end cover 6.

To sum up, the utility model has the advantages of simple structure, reasonable in design, the outside at the cutting edge position of cutter ring is equipped with wear-resisting composite bed, and this wear-resisting composite bed's adhesive force is good, can make the hobbing cutter have advantages such as high strength, high rigidity, high wear resistance, has prolonged the life of hobbing cutter, has reduced the change number of times of hobbing cutter, has reduced construction cost, is applicable to the uneven stratum of hardness.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. The utility model provides a hobbing cutter suitable for uneven hard stratum which characterized in that: including arbor, cutter body, cutter ring, alloy tooth, left end cover, right-hand member lid, bearing and screens retaining ring, the arbor transversely runs through the inside of cutter body, the bearing is installed between arbor and cutter body, the cutter ring is spacing to be fixed in the outside of cutter body through the screens retaining ring of side, the alloy tooth is equipped with a plurality of and inlays uniformly in the hole site of the cutting edge outward flange of cutter ring, the left end cover is located the one end of cutter body, the right-hand member lid is located the other end of cutter body, the outside at the cutting edge position of cutter ring is equipped with wear-resisting composite bed, wear-resisting composite bed is deposited welding layer, diamond polycrystal layer and the high manganese steel layer by the WC granule that sets gradually from outer to inner and is constituteed.

2. The hob for uneven hard and soft ground as claimed in claim 1, wherein: the cutter ring is made of medium-carbon high-alloy structural steel 40 CrNiMoA.

3. The hob for uneven hard and soft ground as claimed in claim 1, wherein: the depth of the alloy teeth embedded into the cutter ring is 30-50 mm.

4. The hob for uneven hard and soft ground as claimed in claim 1, wherein: the width of the cutting edge of the cutter ring is 25 mm-50 mm.

5. The hob for uneven hard and soft ground as claimed in claim 1, wherein: the center-to-center distance between two adjacent alloy teeth is 2.5 times of the diameter of the single alloy tooth.

6. The hob for uneven hard and soft ground as claimed in claim 1, wherein: and oil seals are respectively arranged between the left end cover and the cutter body and between the right end cover and the cutter body.

7. The hob for uneven hard and soft ground as claimed in claim 1, wherein: and the cutter shaft is respectively provided with a retaining block positioned on the outer side of the left end cover and the outer side of the right end cover.

8. The hob for uneven hard and soft ground as claimed in claim 1, wherein: the bearing is equipped with two, is equipped with bearing interval packing ring between two bearings.