CN218109468U - Cutting tool - Google Patents

Abstract

The utility model provides a cutting tool, including handle of a knife and the tool bit that is connected, the tool bit includes tool bit body, a plurality of finishing parts and a plurality of cutting parts. This body coupling of tool bit is in the handle of a knife, a plurality of trimming portions all connect in the tool bit body, a plurality of trimming portions set up along the circumference interval of tool bit body, every trimming portion is equipped with the trimming blade, a plurality of cutting portions all connect in tool bit body and circumference interval setting, every cutting portion is located between two adjacent trimming portions and is equipped with the cutting edge, the cutting edge is opposite with the slope direction of trimming blade, first chip groove and the second chip groove of intercommunication are seted up respectively between every cutting portion and two adjacent trimming portions, a plurality of first chip grooves and a plurality of second chip grooves alternate setting in the circumference of tool bit body. So, the first chip groove of a plurality of chip grooves and a plurality of second chip groove of circumference alternating have increased clastic chip removal passageway, and the opposite finishing edge of inclination and cutting edge have increased clastic crushing degree, have improved the machining efficiency of work piece.

Description

Cutting tool

Technical Field

The utility model relates to a cutter technical field, concretely relates to cutting tool.

Background

When adopting the cutter to mill the work piece, the chip groove discharge in the cutter can be followed to the piece that mills, and wherein, the chip groove in the cutter mostly is same spiral direction setting, for example: the chip groove is a left-handed structure or a right-handed structure, the chips can be extruded to form burrs or block-shaped cracks along with the increase of the quantity in the process of moving along the chip groove, the burrs or the block-shaped cracks formed by the chips can scratch the surface of a workpiece easily, and in order to ensure the processing quality of the workpiece, the finished cutter is required to be adopted to finish the processed workpiece, so that the processing efficiency of the workpiece is reduced.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to provide a cutting tool to solve the technical problem of how to improve the machining efficiency of a workpiece.

An embodiment of the utility model provides a cutting tool, cutting tool is including handle of a knife and the tool bit that is connected, the tool bit includes:

the tool bit body is connected to the tool handle;

the plurality of trimming parts are connected to the tool bit body and are arranged at intervals along the circumferential direction of the tool bit body, and each trimming part is provided with a trimming edge;

a plurality of cutting portions all connect in the tool bit body, it is a plurality of the cutting portion is followed the circumference interval of tool bit body sets up, every the cutting portion is located adjacent two trim between the portion and be equipped with the cutting edge, the cutting edge with the incline direction of trimming edge is opposite, every cutting portion and adjacent two the first chip groove and the second chip groove of intercommunication are seted up respectively between the trim, and are a plurality of first chip groove and a plurality of the second chip groove is followed the circumference of tool bit body sets up in turn.

In some embodiments, the first flute and the second flute are both helical, and the helical directions of the first flute and the second flute are opposite.

In some embodiments, the helix angles of the first and second flutes are each in the range of 38 ° to 42 °.

In some embodiments, the cutting portion is provided with a first cutting relief angle, the dressing portion is provided with a first dressing relief angle, and the first cutting relief angle and the first dressing relief angle each range in angle from 5 ° to 8 °.

In some embodiments, the cutting section is further provided with a second cutting relief angle, and the dressing section is provided with a second dressing relief angle, and the angle ranges of the second cutting relief angle and the second dressing relief angle are both 10 ° to 12 °.

In some embodiments, the cutting edge and the dressing edge are inclined at an angle of 12 ° to 15 °.

In some embodiments, the end face, away from the tool holder, of the tool bit body is provided with a plurality of milling portions, the milling portions are arranged at intervals along the circumferential direction of the tool bit body, each milling portion is connected with one cutting portion, a milling groove is formed between every two adjacent milling portions, and the milling grooves are communicated with the first chip discharge groove and the second chip discharge groove.

In some embodiments, the milling portion is provided with a first milling rake angle having an angular range of 1.5 ° to 2.5 °.

In some embodiments, the tool shank comprises:

a main body;

a transition body having one end connected to the main body;

the two ends of the connecting body are respectively connected to the other ends of the tool bit body and the transition body, and the cross sectional area of the connecting body is smaller than that of the tool bit body and that of the transition body; wherein,

the cross-sectional area of the transition body decreases in sequence from the main body to the connecting body.

In some embodiments, the cutting tool satisfies the relationship:

D≥2d；

and D is the diameter of the circumscribed circle where the plurality of cutting parts are located, and D is the diameter of the circumscribed circle where the connecting body is located.

When the cutting tool cuts a workpiece, the trimming edge of the trimming part and the cutting edge of the cutting part alternately process the workpiece along with the rotation of the cutting tool, the chips generated by each cutting part cutting the workpiece are discharged by the first chip discharge groove, the chips generated by each trimming part cutting the workpiece are discharged by the second chip discharge groove, and in addition, the inclination directions of the trimming edge and the cutting edge are opposite, and the trimming edge can further crush the chips accumulated in the first chip discharge groove. So, adopt a plurality of first chip grooves and a plurality of second chip grooves that set up in turn along the circumference of tool bit body, increased clastic chip removal passageway, increased clastic crushing degree through opposite direction of inclination's finishing sword and cutting edge, avoided the produced piece of processing work piece to form burr or cubic fracture and cause the fish tail to the work piece surface to the machining efficiency of work piece has been improved.

Drawings

Fig. 1 is a schematic structural diagram of a cutting tool according to an embodiment of the present invention.

Fig. 2 is an enlarged schematic view of region ii in fig. 1.

Fig. 3 is a schematic structural view of the cutter head and a part of the cutter handle in fig. 1.

FIG. 4 is an enlarged view of the area IV in FIG. 3.

Fig. 5 is a schematic structural view of a tool bit and a part of a connecting member according to an embodiment of the present invention.

Description of the main elements

Cutting tool 10

Center axis 10a

First chip groove 101

Second chip groove 102

Knife handle 11

Main body 111

Transition body 112

Connecting body 113

Cutting head 12

Tool bit body 121

Trimming part 122

Dressing edge 122a

Front finishing face 1221

First rear finishing surface 1222

Second afterfinish 1223

Cutting part 123

Cutting edge 123a

Front cutting face 1231

First rear cutting face 1232

Second rear cutting face 1233

Milling part 124

Milled slot 124a

Milling edge 124b

Front milled face 1241

Rear milling face 1242

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically, electrically or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The embodiment of the utility model provides a cutting tool, cutting tool include handle of a knife and the tool bit that is connected, and the tool bit includes tool bit body, a plurality of finishing portion and a plurality of cutting portion. This body coupling of tool bit in the handle of a knife, a plurality of sections of repairing all connect in the tool bit body, and a plurality of sections of repairing set up along the circumference interval of tool bit body, every section of repairing is equipped with the trimming blade, a plurality of cutting portions all connect in the tool bit body, a plurality of cutting portions set up along the circumference interval of tool bit body, every cutting portion is located between two adjacent sections of repairing and is equipped with the cutting edge, the cutting edge is opposite with the incline direction who trims the blade, the first chip groove and the second chip groove of intercommunication are seted up respectively between every cutting portion and two adjacent sections of repairing, a plurality of first chip grooves and a plurality of second chip grooves alternate setting in the circumference of tool bit body.

When the cutting tool cuts a workpiece, the correcting edge of the correcting part and the cutting edge of the cutting part alternately process the workpiece along with the rotation of the cutting tool, the chips generated by each cutting part cutting the workpiece are discharged by the first chip discharge groove, the chips generated by each correcting part cutting the workpiece are discharged by the second chip discharge groove, in addition, the inclination directions of the correcting edge and the cutting edge are opposite, and the correcting edge can further crush the chips accumulated in the first chip discharge groove. So, adopt a plurality of first chip grooves and a plurality of second chip grooves that set up in turn along the circumference of tool bit body, increased clastic chip removal passageway, increased clastic crushing degree through opposite direction of inclination's finishing sword and cutting edge, avoided the produced piece of processing work piece to form burr or cubic fracture and cause the fish tail to the work piece surface to the machining efficiency of work piece has been improved.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 and 2 together, in some embodiments, the cutting tool 10 includes a shank 11 and a cutting head 12 connected together, and the cutting head 12 includes a cutting head body 121, a plurality of dressing portions 122, and a plurality of cutting portions 123. The tool bit body 121 is connected to the tool holder 11, the plurality of trimming portions 122 are connected to the tool bit body 121, the plurality of trimming portions 122 are arranged at intervals in the circumferential direction of the tool bit body 121, each trimming portion 122 is provided with a trimming edge 122a, the plurality of cutting portions 123 are connected to the tool bit body 121, the plurality of cutting portions 123 are arranged at intervals in the circumferential direction of the tool bit body 121, each cutting portion 123 is located between two adjacent trimming portions 122 and is provided with a cutting edge 123a, the inclination directions of the cutting edges 123a and the trimming edges 122a are opposite, a first chip removal groove 101 and a second chip removal groove 102 which are communicated with each other are respectively formed between each cutting portion 123 and two adjacent trimming portions 122, and the plurality of first chip removal grooves 101 and the plurality of second chip removal grooves 102 are alternately arranged in the circumferential direction of the tool bit body 121.

In this embodiment, the cutting tool 10 is, for example, a cylindrical structure and has a central axis 10a, the tool bit body 121 is disposed coaxially with the tool shank 11, the cutting portion 123 is connected to a side of the tool bit body 121 away from the tool shank 11, and the trimming portion 122 is connected to a side of the tool bit body 121 close to the tool shank 11. The inclination directions of the cutting edge 123a and the dressing edge 122a refer to the deflection directions of the cutting edge 123a and the dressing edge 122a with respect to the central axis 10 a.

In the present embodiment, the number of the finishing portion 122 and the number of the cutting portion 123 are four, and the number of the first chip grooves 101 and the second chip grooves 102 is also four.

When the cutting tool 10 cuts a workpiece, the trimming edge 122a of the trimming portion 122 and the cutting edge 123a of the cutting portion 123 perform staggered machining on the workpiece with the rotation of the cutting tool 10, chips generated when each cutting portion 123 cuts the workpiece are discharged from the first chip discharge groove 101, chips generated when each trimming portion 122 cuts the workpiece are discharged from the second chip discharge groove 102, and in addition, the trimming edge 122a and the cutting edge 123a are inclined in opposite directions, and the trimming edge 122a can further crush the chips collected in the first chip discharge groove 101. Like this, adopt a plurality of first chip grooves 101 and a plurality of second chip grooves 102 that set up along the circumference of tool bit body 121 in turn, increased clastic chip removal passageway, increased clastic crushing degree through opposite trim sword 122a of incline direction and cutting edge 123a, avoided the produced piece of processing work piece to form burr or cubic fracture and caused the fish tail to the work piece surface to the machining efficiency of work piece has been improved.

In some embodiments, the first flutes 101 and the second flutes 102 are helical, and the helical directions of the first flutes 101 and the second flutes 102 are opposite. As described above, the spiral first chip groove 101 and the spiral second chip groove 102 have a large receiving capacity and can provide a good guiding function for the generated chips.

In some embodiments, the helix angles of the first flutes 101 and the second flutes 102 each range from 38 ° to 42 °, for example: 38 °, 39 °, 40 °, 41 °, 42 °. Therefore, the spiral angles of the first chip discharge groove 101 and the second chip discharge groove 102 can be reasonably configured, so that the first chip discharge groove 101 and the second chip discharge groove 102 smoothly guide and discharge chips on the basis of meeting the chip accommodation requirement. Specifically, if the helix angle of the first chip groove 101 and the second chip groove 102 is smaller than 38 °, the amount of the chips received by the first chip groove 101 and the second chip groove 102 is reduced, and if the helix angle of the first chip groove 101 and the second chip groove 102 is larger than 42 °, the openings of the first chip groove 101 and the second chip groove 102 are too large, which easily causes the received chips to be separated from the first chip groove 101 and the second chip groove 102 during the rotation of the cutting tool 10.

Referring to fig. 3, the cutting portion 123 includes a front cutting surface 1231, a first rear cutting surface 1232, and a second rear cutting surface 1233, an intersection of the front cutting surface 1231 and the first rear cutting surface 1232 forms a cutting edge 123a, the dressing portion 122 includes a front dressing surface 1221, a first rear dressing surface 1222, and a second rear dressing surface 1223, and an intersection of the front dressing surface 1221 and the first rear dressing surface 1222 forms a dressing edge 122a.

In some embodiments, the cutting portion 123 is provided with a first cutting relief angle, and the dressing portion 122 is provided with a first dressing relief angle, the first cutting relief angle and the first dressing relief angle each ranging in angle from 5 ° to 8 °, for example: 5 degrees, 6 degrees, 7 degrees and 8 degrees. In this way, the cutting tool 10 can discharge the chips generated by the cutting edge 123a and the dressing edge 122a in time by properly configuring the first cutting relief angle and the first dressing relief angle.

For convenience of illustration, in the present embodiment, the angle a between the front cutting face 1231 and the first rear cutting face 1232, and the angle B between the front dressing face 1221 and the first rear dressing face 1222 are illustrated as examples. As shown in fig. 4, the included angle a is complementary to the first cutting clearance angle, i.e. the included angle a ranges from 82 ° to 85 °, for example: 82 °, 83 °, 84 °, 85 °, the included angle B is complementary to the first dressing back angle, i.e. the included angle B ranges from 82 ° to 85 °, for example: 82 °, 83 °, 84 °, 85 °.

In some embodiments, the cutting portion 123 is provided with a second cutting relief angle, and the dressing portion 122 is provided with a second dressing relief angle, and the angle ranges of the second cutting relief angle and the second dressing relief angle are both 10 ° to 12 °, for example: 10 °, 11 °, 12 °. In this way, the first rear cutting surface 1232 and the second rear cutting surface 1233 form a stepped structure, and the first rear dressing surface 1222 and the second rear dressing surface 1223 also form a stepped structure, which can further improve the efficiency of the cutting tool 10 in discharging the chips generated by the cutting edge 123a and the dressing edge 122a in time machining the workpiece.

For convenience of illustration, in the present embodiment, the angle C between the front cutting face 1231 and the second rear cutting face 1233, and the angle D between the front dressing face 1221 and the second rear dressing face 1223 are illustrated as examples. As shown in fig. 4, the included angle C is complementary to the second cutting relief angle, i.e. the included angle C ranges from 78 ° to 80 °, for example: 78 °, 79 °, 80 °, the included angle D is complementary to the second finishing back angle, i.e. the included angle D ranges from 78 ° to 80 °, for example: 78 °, 79 °, 80.

Referring to fig. 2, in some embodiments, the cutting edge 123a and the trimming edge 122a are inclined at an angle of 12 ° to 15 °, for example: 12 °, 13 °, 14 °, 15 °. The included angle between the cutting edge 123a and the central axis 10a is E, the included angle E is the inclination angle of the cutting edge 123a, the included angle between the trimming edge 122a and the central axis 10a is F, and the included angle F is the inclination angle of the trimming edge 122a.

By appropriately arranging the inclination angles of the cutting edge 123a and the dressing edge 122a in this manner, the workpiece can be efficiently cut. Specifically, if the inclination angle is smaller than 12 °, the cutting force applied to the workpiece by the cutting edge 123a and the truing edge 122a is insufficient, and if the inclination angle is larger than 15 °, the cutting coverage of the workpiece by the cutting edge 123a and the truing edge 122a is insufficient.

Referring to fig. 3, in some embodiments, the end surface of the tool bit body 121 facing away from the tool shank 11 is provided with a plurality of milling portions 124, the plurality of milling portions 124 are arranged at intervals along the circumferential direction of the tool bit body 121, each milling portion 124 is connected with one cutting portion 123, a milling groove 124a is formed between two adjacent milling portions 124, and the milling grooves 124a are communicated with the first chip flutes 101 and the second chip flutes 102. In this way, during operation, the cutting tool 10 is rotated, the milling portion 124 can machine the surface of the workpiece to form the accommodating groove, and the cutting portion 123 and the trimming portion 122 can perform cutting and trimming operations on the side wall of the accommodating groove by continuing to rotate the cutting tool 10, so as to finally form the required groove structure.

In some embodiments, the milling portion 124 includes a front milling face 1241 and a rear milling face 1242, the front milling face 1241 connecting the front cutting face 1231, the rear milling face 1242 connecting the first rear cutting face 1232, and an intersection of the front milling face 1241 and the rear milling face 1242 forming the milling edge 124b of the milling portion 124.

In some embodiments, the milling portion 124 is provided with a first milling rake angle ranging from 1.5 ° to 2.5 °, such as: 1.5 °, 2.0 °, 2.5 °. For convenience of illustration, in this embodiment, an angle G between the front milling face 1241 and the bottom wall of the milling groove 124a is illustrated as an example. As shown in fig. 4, the included angle G is complementary to the first milling rake angle, i.e. the included angle G ranges from 86.5 ° to 87.5 °, for example: 86.5 °, 87 °, 87.5 °.

Therefore, the milling efficiency of the workpiece can be improved by reasonably configuring the size of the first milling front angle. Specifically, if the angle of the first milling rake angle is smaller than 1.5 °, the included angle of the bottom wall of the milling groove 124a of the front milling face 1241 is too large, which easily causes the milled part 124 to break during milling of the workpiece, and if the angle of the first milling rake angle is larger than 1.5 °, the included angle of the bottom wall of the milling groove 124a of the front milling face 1241 is too small, which results in insufficient milling force of the milling edge 124b on the workpiece.

Referring to fig. 1, in some embodiments, the tool shank 11 includes a main body 111, a transition body 112, and a connecting body 113. One end of the transition body 112 is connected to the main body 111, two ends of the connection body 113 are respectively connected to the other ends of the tool bit body 121 and the transition body 112, the cross-sectional area of the connection body 113 is smaller than that of the tool bit body 121 and the transition body 112, and the cross-sectional area of the transition body 112 decreases from the main body 111 to the connection body 113 in sequence.

Therefore, a space can be formed between the main body 111 and the tool bit body 121, after the milling portion 124 mills the workpiece to form the accommodating groove, the plurality of cutting portions 123 and the plurality of trimming portions 122 can conveniently enter the accommodating groove smoothly, so as to cut the side wall of the accommodating groove, and in addition, the conical transition body 112 is adopted, so that the connection strength between the main body 111 and the tool bit body 121 can be improved.

Referring to fig. 5, in some embodiments, the cutting tool 10 satisfies the relationship: d is larger than or equal to 2D, wherein D is the diameter of the circumscribed circle where the plurality of cutting parts 123 are located, and D is the diameter of the circumscribed circle where the connecting body 113 is located. In this way, by appropriately configuring the ratio of the diameter of the circumscribed circle where the plurality of cutting portions 123 are located to the diameter of the circumscribed circle where the connecting body 113 is located, the generated chips can be smoothly discharged along the first chip groove 101 and the second chip groove 102. Specifically, if the diameter of the circumscribed circle on which the plurality of cutting portions 123 are located is smaller than the diameter of the circumscribed circle on which the connecting body 113 is located, the depth of the first chip groove 101 and the second chip groove 102 formed is shallow, and the generated chips are easily removed from the first chip groove 101 and the second chip groove 102.

The operation of the cutting tool 10 is generally as follows, and the vertical direction of the workpiece is taken as the machining direction for example: first, the main body 111 of the tool holder 11 is driven by an external power device (e.g., a robot) to move downward and rotate, so that the milling edge 124b of the milling part 124 mills the surface of the workpiece to form a receiving groove; then, the main body 111 of the tool holder 11 is driven to move downwards and rotate continuously, so that the cutting part 123 and the trimming part 122 enter the accommodating groove, and the cutting and trimming operations are respectively performed on the side wall of the accommodating groove until the processing requirements are met; finally, the driving tool shank 11 drives the tool bit 12 to be separated from the accommodating groove.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A cutting tool comprising a shank and a head connected, the head comprising:

the tool bit body is connected to the tool handle;

the plurality of trimming parts are connected to the tool bit body and arranged at intervals along the circumferential direction of the tool bit body, and each trimming part is provided with a trimming edge;

a plurality of cutting portions all connect in the tool bit body, it is a plurality of the cutting portion is followed the circumference interval of tool bit body sets up, every the cutting portion is located adjacent two trim between the portion and be equipped with the cutting edge, the cutting edge with the incline direction of trimming edge is opposite, every cutting portion and adjacent two the first chip groove and the second chip groove of intercommunication are seted up respectively between the trim, and are a plurality of first chip groove and a plurality of the second chip groove is followed the circumference of tool bit body sets up in turn.

2. The cutting tool of claim 1,

first chip groove with the second chip groove all is the heliciform, just first chip groove with the spiral direction of second chip groove is opposite.

3. The cutting tool of claim 2,

the spiral angles of the first chip grooves and the second chip grooves are in the range of 38-42 degrees.

4. The cutting tool of claim 1,

the cutting part is provided with a first cutting relief angle, the trimming part is provided with a first trimming relief angle, and the angle ranges of the first cutting relief angle and the first trimming relief angle are both 5-8 degrees.

5. The cutting tool of claim 4,

the cutting part is also provided with a second cutting relief angle, the trimming part is provided with a second trimming relief angle, and the angle ranges of the second cutting relief angle and the second trimming relief angle are both 10-12 degrees.

6. The cutting tool of claim 1,

the inclination angles of the cutting edge and the trimming edge are both 12-15 degrees.

7. The cutting tool of claim 1,

the tool bit body deviates from the end face of the tool shank is provided with a plurality of milling parts, the milling parts are arranged along the circumferential interval of the tool bit body, each milling part is connected with one cutting part, two adjacent milling parts form a milling groove between the milling parts, and the milling groove is communicated with the first chip discharge groove and the second chip discharge groove.

8. The cutting tool of claim 7,

the milling part is provided with a first milling front angle, and the angle range of the first milling front angle is 1.5-2.5 degrees.

9. The cutting tool of claim 1, wherein the shank comprises:

a main body;

a transition body having one end connected to the main body;

the two ends of the connecting body are respectively connected to the other ends of the tool bit body and the transition body, and the cross sectional area of the connecting body is smaller than that of the tool bit body and that of the transition body; wherein,

the cross-sectional area of the transition body decreases in sequence from the main body to the connecting body.

10. The cutting tool of claim 9, wherein the cutting tool satisfies the relationship:

D≥2d；

and D is the diameter of the circumscribed circle where the plurality of cutting parts are located, and D is the diameter of the circumscribed circle where the connector is located.

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