CN115821702A - Milling device, machining method thereof and pavement milling machine - Google Patents

Abstract

The present disclosure relates to a milling device, a processing method thereof, and a road milling machine, wherein the milling device includes: a drum (1); and at least one milling tooth group, wherein the milling tooth group comprises a plurality of milling teeth (2) and is arranged on the roller (1) along a spiral line, the milling teeth (2) are plate-shaped, and the axial distance between adjacent milling teeth (2) in the same milling tooth group is zero.

Description

Milling device, machining method thereof and pavement milling machine

Technical Field

The disclosure relates to the field of highway pavement maintenance construction, in particular to a milling device, a machining method thereof and a pavement milling machine.

Background

In recent years, along with the increasing diversification of the road maintenance construction requirements, the pavement marking grooving and the old pavement marking clearing construction field face the problem of shortage of professional equipment, the construction has the requirements of shallow removing depth, high removing speed, high flatness and the like, particularly in the areas easy to accumulate snow such as northeast and the like, and in order to avoid damaging the pavement marking during snow removal, the pavement marking grooving with the depth of 3-5 mm needs to be milled on the surface layer of the pavement for marking brushing.

In the prior art known by the inventor, there are two main technical schemes for grooving pavement markings, one scheme is to modify a milling wheel of a small pavement milling machine, and increase the number of milling bits in a unit milling width, and the scheme can improve the planeness and milling speed of pavement materials to a certain extent, but too many milling bits bring challenges to the milling wheel machining and manufacturing, and it is difficult to ensure that all milling bits are on the same cylindrical surface, so that the milling planeness of the pavement is affected, and because the milling wheel usually adopts bullet-shaped milling bits, only the milling bits participate in milling when the milling depth is shallow, the milling area is narrow, and the improvement of the pavement planeness is limited; the other scheme is that a polishing head or a steel brush is arranged on a rotating device, but the equipment can only be used for removing old marked lines and cannot be used for grooving the pavement with high hardness, and in addition, the scheme has low operation efficiency and is not suitable for the modern road maintenance construction trend.

Disclosure of Invention

The embodiment of the disclosure provides a milling device, a processing method thereof and a pavement milling machine, which can improve the pavement milling flatness.

According to a first aspect of the present disclosure, a milling device is presented, comprising:

a drum; and

the milling teeth are plate-shaped, and the axial distance between adjacent milling teeth in the same milling teeth group is zero.

In some embodiments, a reinforcing plate is arranged between adjacent milling teeth along the spiral line direction.

In some embodiments, the milling tooth group is provided with a plurality of corresponding spiral lines which are arranged at intervals along the axial direction, and the distance between every two adjacent spiral lines is consistent.

In some embodiments, the drum is provided with a plurality of milling teeth along the circumferential direction in the same milling area along the axial direction, and the plurality of milling teeth in the same milling area respectively belong to different milling tooth groups.

In some embodiments, the milled teeth comprise a mill having an axial width of 20mm to 30mm.

In some embodiments, the milling tooth includes a seat and a milling cutter, a cutting face of the milling cutter is inclined rearwardly relative to the front tooth face by a predetermined angle, the predetermined angle being an acute angle.

In some embodiments, the outer side wall of the drum is provided with a plurality of positioning slots for fixing milling teeth, and the milling device further comprises:

the flange plate is connected to the end part of the roller and is provided with a mounting hole coaxial with the roller;

wherein, a plurality of constant head tanks have the same clamping benchmark.

In some embodiments, the outer side wall of the drum is provided with a plurality of positioning grooves for fixing the milling teeth, and the bottom surfaces of the positioning grooves are planes parallel to the axial direction.

According to a second aspect of the present disclosure, a method for processing a milling device based on the above embodiment is provided, where the milling device includes a flange plate disposed at an end of a drum, and the flange plate is provided with a mounting hole, and the drum is provided with a plurality of positioning grooves for fixing milling teeth, including:

processing a plurality of positioning grooves under the same clamping reference;

in the one-time clamping process of the machine tool, all positioning grooves are processed;

and fixing the milling teeth in the positioning grooves.

According to a third aspect of the disclosure, a road milling machine is proposed, comprising the milling device of the above embodiments.

In some embodiments, the milling device includes a flange plate disposed at an end of the drum, and the flange plate is provided with a mounting hole, and the road milling machine includes a limiting structure configured to cooperate with the mounting hole to achieve limiting mounting of the milling device.

Based on above-mentioned technical scheme, the milling device of this disclosed embodiment, simple structure, the stable performance adopts the plate-type to mill the tooth, and the monodentate mills that the width is big, and the adoption of adjacent milling teeth in same milling teeth group is seamless to be arranged, can realize milling regional full coverage, improves the milling roughness to the road surface material, can also adapt to operating modes such as road surface grooving, realizes that the shallow layer mills under the operating mode and mills the level and smooth milling.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:

fig. 1 is a schematic structural view of some embodiments of the milling device of the present disclosure.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a schematic structural view of some embodiments of a drum and a flange of the milling device of the present disclosure.

Fig. 4 is an expanded view of a milling tooth arrangement of some embodiments of the milling device of the present disclosure.

Fig. 5 is a gear milling installation schematic of some embodiments of the milling device of the present disclosure.

Fig. 6 is a schematic view of a preset angle of a milling cutter of some embodiments of the milling device of the present disclosure.

Description of the reference numerals

1. A drum; 2. milling teeth; 3. a reinforcing plate; 4. a flange plate; 11. positioning a groove; 21. a tool apron; 22. milling cutters; 41. mounting holes; A. a first spiral line; B. a second spiral line; C. a third spiral line; D. milling a tooth milling rotation center line; E. and (6) cutting the surface.

Detailed Description

The present disclosure is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Aspects so defined may be combined with any other aspect or aspects unless clearly indicated to the contrary. In particular, any feature considered to be preferred or advantageous may be combined with one or more other features considered to be preferred or advantageous.

The terms "first", "second", and the like in the present disclosure are merely for convenience of description to distinguish different constituent elements having the same name, and do not denote a sequential or primary-secondary relationship.

In the description of the present disclosure, it is to be understood that the terms "inner", "outer", "upper", "lower", "front" and "rear", etc., indicate orientations or positional relationships that are defined with reference to a direction of movement of a drum, flange, milled tooth or tooth, etc., are used for convenience in describing the present disclosure, and do not indicate or imply that the device being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present disclosure.

For the purposes of making the present disclosure clearer and for more convenient description of the present disclosure, definitions of some abbreviations and key terms are given herein together, and the definitions of these specific terms do not constitute a limitation on the scope of protection of the present disclosure.

A pavement milling machine: the device is one of main devices for maintaining and constructing the asphalt concrete pavement, is mainly used for excavating and renovating the asphalt concrete pavement such as highways, town roads, airports, goods yards and the like, is used for removing the defects of pavement upheaval, oil wave, reticulate patterns, ruts and the like, is used for excavating pavement pits and grooves, and is used for napping the cement pavement and milling the staggered platform of the pavement.

Grooving of pavement markings: in the northeast easy snow accumulation area, in order to avoid damaging the pavement marking when removing snow, a pavement groove with the depth of 3-5 mm needs to be milled on the surface layer of the pavement for brushing the marking.

Removing the pavement markings: due to the change of traffic management schemes and other reasons, original road marked lines need to be removed, misleading is easily caused to driving of a driver if the original marked lines are not completely removed, and common marked line removing methods include a polishing removing method, a milling removing method, a shot blasting removing method, a brushing method and the like.

First, in some illustrative embodiments, as shown in fig. 1-6, the present disclosure provides a milling device comprising: the milling device comprises a roller 1 and at least one milling tooth group, wherein the milling tooth group comprises a plurality of milling teeth 2 and is arranged on the roller 1 along a spiral line, the milling teeth 2 are plate-shaped, and the axial distance between every two adjacent milling teeth 2 in the same milling tooth group is zero.

In particular, the axial direction of the milling device coincides with the axial direction of the drum 1. Specifically, the milling teeth 2 are fixedly connected with the drum 1, and optionally, the milling teeth 2 are welded with the drum 1. Alternatively, the milling tooth 2 may comprise a seat 21 and a milling cutter 22. Specifically, the milling cutter 22 of the milling teeth 2 is a plate-shaped wide tooth surface distinguished from a bullet-shaped cutter head, and a plurality of milling teeth 2 in each milling tooth group are arranged on the roller 1 in a spiral line, so that the stress at the joint of the milling teeth 2 and the roller 1 in the operation process of the milling device is optimized, and the operation stability of the milling device is further improved.

Specifically, the axial distance between adjacent milling teeth 2 in the same milling tooth group is zero, that is, the milling teeth 2 located on a single spiral line in the axial direction of the drum 1 are arranged seamlessly, and more specifically, the axial distance between the milling cutters 22 of adjacent milling teeth 2 in the same milling tooth group is zero, so that the milling area can be ensured to be fully covered in the axial direction, and the milling flatness of the pavement material can be improved.

Specifically, under the condition that the milling depth is shallow, for example, pavement marking grooving with the depth of 3-5 mm is milled on the surface layer of the pavement in the regions easy to accumulate snow such as northeast, the plate-shaped wide tooth surfaces of all the milling teeth 2 participate in milling, the milling area is large, and the improvement of the pavement evenness under the shallow milling working condition is facilitated. Alternatively, the plurality of sets of milling teeth may or may not be axially spaced.

The milling device of the embodiment has the advantages that the structure is simple, the performance is stable, the plate-shaped milling teeth 2 are adopted, the milling width of a single tooth is large, the axial distance between every two adjacent milling teeth 2 in the same milling tooth group is zero, the seamless arrangement is adopted, the full coverage of a milling area can be realized, and the milling flatness of a pavement material is improved; meanwhile, the plate-shaped wide tooth surfaces of all the milling teeth 2 participate in milling, and can adapt to working conditions such as pavement grooving and the like, so that the flat milling under the shallow milling working condition is realized.

In some embodiments, as shown in fig. 1 and 3, a reinforcing plate 3 is arranged between adjacent milling teeth 2 along the spiral direction.

Specifically, adjacent milling teeth 2 all belong to the same milling tooth group. In particular, in the case of milling teeth 2 comprising seats 21 and milling cutters 22, the reinforcing plate is provided between the seats 21 of adjacent milling teeth 2 of the same milling teeth group, more specifically, the two lateral faces of the reinforcing plate 3 are fixedly connected to the adjacent seats 21, respectively, and the bottom face of the reinforcing plate 3 is fixedly connected to the drum 1.

The milling device of this embodiment sets up reinforcing plate 3 through along the helix direction between adjacent milling teeth 2, can enough strengthen the joint strength between the adjacent milling teeth 2, makes milling teeth 2 not squint at milling in-process position, also can strengthen the joint strength who mills tooth 2 and cylinder 1, avoids milling teeth 2 unexpected the droing milling the in-process to strengthen milling device's milling rigidity, improve milling device's milling stability, extension milling device's life.

In some embodiments, as shown in fig. 1 to 4, the milling tooth group is provided with a plurality of and respectively corresponding spiral lines arranged at intervals along the axial direction, and the distance between every two adjacent spiral lines is consistent.

Specifically, as shown in fig. 4, the x direction is the axial direction, the y direction is the advancing direction of the milling device, and the rectangular dashed area in fig. 4 can be indicated as the milling area. Specifically, providing a plurality of sets of milling teeth can increase the number of milling teeth 2 in the same milling area, thereby improving the milling efficiency of the milling apparatus. Alternatively, three helices with uniform axial spacing may be provided to achieve a balanced optimization of the number of milling teeth and the stability of the milling device, such as helix a, helix B and helix C shown in fig. 4.

Specifically, the axial spacing of the plurality of sets of milling teeth is uniform. Specifically, the distance between every two adjacent spiral lines is consistent, so that the stress of the milling teeth 2 in the milling process is more uniform, and the milling stability of the milling device is improved. Alternatively, the milling teeth 2 of the plurality of milling tooth groups may be arranged in a one-to-one correspondence manner or in a staggered manner in the advancing direction y of the milling device, and correspondingly, when the plurality of milling teeth 2 are arranged in a staggered manner, it is also ensured that the axial distance between adjacent milling teeth 2 in the same milling tooth group is zero.

According to the embodiment, the milling teeth are stressed more uniformly in the milling process by arranging the milling teeth groups with the consistent axial intervals, and the milling efficiency and the milling stability of the milling device are improved.

In some embodiments, as shown in fig. 1 to 4, the drum 1 is provided with a plurality of milling teeth 2 along the circumferential direction in the same milling region along the axial direction, and the plurality of milling teeth 2 in the same milling region respectively belong to different milling tooth groups.

Specifically, providing a plurality of milling teeth 2 in the circumferential direction in the same milling region can increase the number of milling teeth 2 in the same milling region, thereby improving the milling efficiency of the milling apparatus. Optionally, 3 milling teeth can be arranged in the same milling area, so that the milling amount in unit time can be increased, the working efficiency of the milling device is improved, the pavement milling flatness is further improved, and the balanced optimization of the number of the milling teeth and the stability of the milling device can be realized.

Specifically, the milling efficiency is reduced due to the fact that the number of milling teeth in the same milling area is too small, and the milling effect is directly influenced after the milling teeth are damaged; the milling teeth in the same milling area are too many, so that the production cost of the milling device can be increased, the processing difficulty of arranging all the milling teeth on the same milling circle can be increased, and the stability of the milling device cannot be improved due to the fact that the milling teeth in the same milling area are too many or too few.

According to the embodiment, the plurality of milling teeth 2 are arranged in the same milling area along the circumferential direction, so that the milling amount in unit time and the working efficiency of the milling device can be improved, the pavement milling flatness is further improved, and the balanced optimization of the number of the milling teeth and the stability of the milling device can be realized.

In some embodiments, the milled teeth 2 include a mill 22, and the mill 22 has an axial width of 20mm to 30mm.

In particular, the milling teeth 2 are plate-shaped milling teeth. Specifically, the cutting edge of the milling cutter 22 has an axial width of 20mm to 30mm so as to better adapt to the working conditions of road grooving and the like.

This embodiment has the milling cutter 22 that axial width is 20mm ~ 30mm through setting up milling tooth 2, and single tooth mills that the width is big, mills efficiently, can adapt to operating modes such as road surface grooving, realizes the level and mills under the shallow layer milling operating mode.

In some embodiments, as shown in fig. 1 to 6, the milling tooth 2 comprises a seat 21 and a milling cutter 22, the cutting face E of the milling cutter 22 being inclined rearwardly with respect to the front tooth face by a preset angle, which is an acute angle.

Specifically, as shown in fig. 5 and 6, the cutting surface E of the milling cutter 22 is a plane where the milling cutter 22 contacts the road surface during operation of the milling device, and the leading tooth surface is a tooth surface that is closest to the road surface first of two parallel side surfaces of the milling cutter 22 during advancement of the milling device. Specifically, the front tooth face of the mill 22 is parallel to the milling tooth milling rotational center line D.

Specifically, as shown in fig. 6, the preset angle a by which the cutting face E of the milling cutter 22 is inclined rearward with respect to the front tooth face may also be referred to as a negative rake angle or milling angle, i.e., an angle between the cutting face of the milling cutter 22 and the front tooth face or milling tooth milling rotation center line D. Alternatively, the preset angle or the negative rake angle a may be set to 15 ° to 20 °. Alternatively, the cutting face of the milling cutter 22 may be made of cemented carbide material for better cutting.

This embodiment is fixed on cylinder 1 through the milling cutter 22 with milling tooth 2 with preset angle, can make the cutting edge of milling cutter 22 realize better milling effect, optimizes the stress state of milling cutter 22, avoids milling cutter 22 tipping, prolongs the life of milling cutter 22, and then can optimize the stress state of milling tooth gesture and milling tooth, extension milling cutter and milling unit's life.

In some embodiments, such as the outer side wall of the drum 1 of fig. 1 to 1 is provided with a plurality of positioning slots 11 for fixing the milling teeth 2, the milling device further comprises:

the flange plate 4 is connected to the end part of the roller 1, and the flange plate 4 is provided with a mounting hole 41 which is coaxial with the roller 1;

wherein, a plurality of constant head tanks 11 have the same clamping benchmark.

In particular, the mounting holes 41 of the flanges 4, which are coaxial with the drum 1, can be used to connect with other stop structures to complete the assembly of the milling device, for example, the milling device can be assembled to the stop member with a rotary driving function through the mounting holes 41 of the flanges 4 on both sides. In particular, the positioning slot 11 is used for positioning and fixing the milling teeth 2. Alternatively, the milling teeth 2 may be fixed to the positioning slot 11 by welding.

Optionally, the same clamping reference may refer to that the plurality of positioning grooves 11 are machined on the same machine tool, which is beneficial to improving the installation positioning accuracy of the milling teeth and the road milling flatness. Optionally, the mounting hole 41 and the positioning grooves 11 may have the same clamping reference, that is, the mounting hole 41 and the positioning grooves 11 are processed on the same machine tool, which is beneficial to ensuring the coaxiality of the mounting hole 41 and the positioning grooves 11, so as to improve the mounting and positioning accuracy of the milling teeth, further ensure that the cutting edges of all the milling teeth 2 are located on the same milling circumferential surface, and improve the road milling flatness.

According to the embodiment, the positioning grooves 11 have the same clamping reference, so that the mounting and positioning accuracy of the milling teeth can be improved, the cutting edges of all the milling teeth are located on the same milling circumferential surface, the pavement milling flatness of the milling device is improved, and the smooth milling under the shallow milling working condition can be realized by improving the positioning accuracy.

In some embodiments, the outer side wall of the drum 1 is provided with a plurality of positioning grooves 11 for fixing the milling teeth 2, and the bottom surfaces of the positioning grooves 11 are planes parallel to the axial direction.

In particular, the positioning slot 11 is used for positioning and fixing the milling tooth 2, for example for welding the milling tooth 2. Specifically, the bottom surface of the tool seat 21 of the milling tooth 2 is a plane surface that is matched with the bottom surface of the positioning groove 11. In particular, the planar bottom surface of the positioning slot 11 may increase the convenience and stability in fixing the milling teeth 2 compared to the circular bottom surface.

This embodiment sets up the bottom surface through with constant head tank 11 into the plane that is on a parallel with the axial, can increase the convenience and the stability of milling the tooth installation, avoids milling the not enough or removal that leads to of tooth installation intensity, and then improves milling device's stability and life.

Secondly, this disclosure provides a milling device's processing method based on above-mentioned embodiment for process above-mentioned milling device, milling device is including establishing the ring flange 4 at the cylinder 1 tip, and is equipped with mounting hole 41 on the ring flange 4, is equipped with a plurality of constant head tanks 11 that are used for fixed milling teeth 2 on the cylinder 1, includes:

processing a plurality of positioning grooves 11 under the same clamping reference;

in the one-time clamping process of the machine tool, all the positioning grooves 11 are processed;

the milling teeth 2 are fixed in the positioning grooves 11.

Alternatively, the same clamping reference may mean that a plurality of positioning grooves 11 are machined on the same machine tool. Specifically, in the process of one-time clamping of the machine tool, all the positioning grooves 11 are machined, machining errors caused by multiple times of clamping can be avoided, the installation and positioning accuracy of the milling teeth 2 can be improved, and the cutting edges of all the milling teeth 2 are ensured to be located on the same milling circumferential surface. Alternatively, the milling teeth 2 may be fixed to the positioning slot 11 by welding.

The processing method of the embodiment is beneficial to improving the mounting and positioning precision of the milling teeth by processing the positioning grooves 11 under the same clamping reference, thereby ensuring that the cutting edges of all the milling teeth are positioned on the same milling circumferential surface and improving the milling flatness of the pavement; all processing is completed through one-time clamping, so that the processing error can be further reduced, the mounting and positioning precision of the milling teeth is improved, and the smooth milling under the shallow milling working condition is realized.

In addition, the disclosure also provides a road milling machine comprising the milling device of the embodiment.

The pavement milling machine of the embodiment has the advantages that the structure is simple, the performance is stable, the milling device adopts the plate-shaped milling teeth 2, the milling width of a single tooth is large, the axial distance between the adjacent milling teeth 2 in the same milling tooth group is zero, the seamless arrangement is adopted, the full coverage of a milling area can be realized, and the milling flatness of pavement materials is improved; meanwhile, the plate-shaped wide tooth surfaces of all the milling teeth 2 participate in milling, the milling precision is high, the milling teeth can adapt to shallow working conditions such as pavement grooving and the like, and smooth milling under the shallow milling working condition is realized.

In some embodiments, the milling device comprises a flange 4 disposed at an end of the drum 1, and the flange 4 is provided with a mounting hole 41, and the road milling machine comprises a limiting structure configured to cooperate with the mounting hole 41 to achieve a limiting mounting of the milling device.

Specifically, the mounting hole 41 is matched with a limiting structure of the road milling machine to directly limit the drum 1, so as to limit the milling device. Alternatively, the limiting structure may be a clamping mechanism or the like having a driving function.

The road milling machine of the embodiment realizes the limiting installation of the milling device by matching the limiting structure with the mounting hole 41, can realize the axial limiting of the milling device, enables the milling device to stably rotate along the advancing direction for milling construction, can adapt to the shallow working conditions such as road grooving and the like, realizes the leveling and milling under the shallow milling working condition, and improves the milling flatness of road materials.

The milling device, the processing method thereof and the road milling machine provided by the present disclosure are described in detail above. The principles and embodiments of the present disclosure are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present disclosure. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present disclosure without departing from the principle of the present disclosure, and such improvements and modifications also fall within the scope of the claims of the present disclosure.

Claims (11)

1. A milling device, comprising:

a drum (1); and

at least one milling tooth group, including a plurality of milling teeth (2) in the milling tooth group and establish along the helix on cylinder (1), milling teeth (2) are the plate-type, and are adjacent in the same milling tooth group the axial interval of milling teeth (2) is zero.

2. Milling device according to claim 1, characterized in that a reinforcement plate (3) is arranged between adjacent milling teeth (2) in the direction of the helix.

3. The milling device of claim 1, wherein the set of milling teeth is provided with a plurality of corresponding helices axially spaced apart, and the pitch of each two adjacent helices is the same.

4. Milling device according to claim 1, characterized in that the drum (1) is provided with a plurality of milling teeth (2) in the circumferential direction in the same milling area in the axial direction, and the plurality of milling teeth (2) in the same milling area belong to different milling tooth groups respectively.

5. Milling device according to claim 1, characterized in that the milling teeth (2) comprise a milling cutter (22), the milling cutter (22) having an axial width of 20-30 mm.

6. Milling device according to claim 1, characterized in that the milling tooth (2) comprises a seat (21) and a milling cutter (22), the cutting face of the milling cutter (22) being inclined backwards with respect to the front tooth face by a preset angle, which is an acute angle.

7. Milling device according to any one of claims 1-6, characterized in that the outer side wall of the drum (1) is provided with a number of positioning slots (11) for fixing the milling teeth (2), the milling device further comprising:

the flange plate (4) is connected to the end part of the roller (1), and a mounting hole (41) which is coaxial with the roller (1) is formed in the flange plate (4);

the positioning grooves (11) have the same clamping reference.

8. Milling device according to any one of claims 1-6, characterized in that the outer side wall of the drum (1) is provided with a plurality of positioning slots (11) for fixing the milling teeth (2), the bottom surfaces of the positioning slots (11) being planes parallel to the axial direction.

9. A machining method based on a milling device according to any one of claims 1-8, characterized in that the milling device comprises a flange (4) arranged at the end of the drum (1), the flange (4) is provided with a mounting hole (41), the drum (1) is provided with a plurality of positioning grooves (11) for fixing the milling teeth (2), and the method comprises the following steps:

processing a plurality of positioning grooves (11) under the same clamping reference;

in the one-time clamping process of the machine tool, all the positioning grooves (11) are processed;

fixing the milling teeth (2) in the positioning grooves (11).

10. A road milling machine, characterized in that it comprises a milling device according to any one of claims 1 to 8.

11. The road milling machine according to claim 10, characterised in that the milling device comprises a flange (4) provided at the end of the drum (1), and in that mounting holes (41) are provided on the flange (4), the road milling machine comprising a limiting structure configured to cooperate with the mounting holes (41) to achieve a limited mounting of the milling device.

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