CN214109516U - Profile sawing machine - Google Patents

Abstract

The utility model discloses a section bar saw cuts machine, it includes the frame, is equipped with the processing platform that supplies the vertical operation of section bar in the frame, material loading material feeding unit, rear portion are equipped with to the front portion of frame pay-off discharge apparatus, be connected with in the frame by the vertical frame that slides of first engine drive, two cutting seats that the interval set up about being equipped with on the frame of sliding, two saw cut correspond on the seat be connected with by saw cut motor drive and be the cutting piece of setting for the contained angle setting with section bar traffic direction, two cutting pieces are the vertical state setting in the projection under the state of overlooking, are equipped with the cutting groove that worker's cutting piece passed on the processing platform, location hold-down mechanism is equipped with in the frame, still is equipped with in the frame and is located processing platform one side and can carry out the drilling mechanism that drills to the section bar that presss from both sides tightly. The utility model discloses can realize automatic feeding, pay-off of section bar, saw cut, drilling and unload and the unloading work, have labor efficiency height, saw cut accurate advantage.

Description

Profile sawing machine

Technical Field

The utility model belongs to section bar processing equipment field specifically is a relate to a section bar saw cuts machine.

Background

In the door and window processing industry, the sash materials (including frames, mullions and the like) of doors and windows need to be cut, punched and the like. When processing door and window in current mill, adopt automatic saw cutter to carry out the unloading and handle mostly, cut the back of accomplishing, reuse drilling machine and carry out drilling processing, assemble at last. The operation of clamping and processing for multiple times not only has low labor efficiency, but also is easy to cause the problem of processing error caused by non-uniform positioning for multiple times, and has great influence on the assembly procedure in the later period.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a section bar saw cuts machine can high-efficiently realize the work of unloading of the pay-off of saw cutting, drilling process and the section bar of autoloading, material loading, section bar.

In order to solve the technical problem, the utility model provides a section bar saw cuts machine, including the frame, be equipped with the processing platform that supplies the section bar to vertically move in the frame, its structural feature is: the front portion of frame is equipped with material loading material feeding unit, the rear portion is equipped with pay-off discharge apparatus, be connected with in the frame by the vertical frame that slides of first engine drive, two of interval setting about being equipped with on the frame that slides saw cut the seat, saw cut on the seat correspondingly be connected with by saw cut motor drive and be the cutting piece of setting for the contained angle setting with section bar traffic direction for two, two cutting pieces are the vertical state setting in the projection of overlooking the state, are equipped with the cutting groove that worker's cutting piece passed on the processing platform, location hold-down mechanism is equipped with in the frame, still is equipped with in the frame to be located processing platform one side and can carry out the drilling mechanism of driling to the section bar of pressing from both sides tightly.

After the structure is adopted, the section bar automatically realizes feeding and feeding by the feeding device, longitudinally runs on the processing platform, and is pressed and positioned by the pressing and positioning mechanism after running to a proper position, the sliding frame slides under the driving of the power of the first power machine, the section bar is cut off by the cutting blade of one of the cutting seats, so that the end surface of the section bar has a certain inclination angle, the later-stage assembly is facilitated, meanwhile, the drilling mechanism drills the section bar, the two procedures of sawing and drilling are realized, and after the sawing is finished, the automatic discharging is realized by the feeding and discharging device. In addition, the front end face of the rear section meets the requirement, after the section continuously moves forwards, when the next section of section is sawn, the sliding frame slides reversely under the driving of the first power machine, and the rear end face of the next section of section is just perpendicular to the front end face of the next section of section, so that the sawing requirement of the section is met, and the working efficiency is greatly improved.

The positioning and pressing mechanism comprises two pressing seats which are connected to the rack and arranged at intervals in the front-back direction, the pressing seats are connected to the rack in a sliding mode and driven by the power of a pressing power machine to slide up and down, and a pressing plate which can be matched with the upper surface of the machining platform to press the profile is arranged at the top of each pressing seat.

The processing platform is provided with a vertical plate for the profile to lean against and slide, the rack is also connected with an extrusion plate corresponding to the pressing seat, the extrusion plate is driven by an extrusion power machine connected to the rack to slide transversely, and the extrusion plate can be matched with the vertical plate to form a sliding groove for the profile to slide after sliding transversely.

The drilling mechanism comprises a lower sliding seat which is connected to the rack and is driven by a first drilling power machine to slide transversely, an upper sliding seat which is driven by a second drilling power machine to slide longitudinally is connected to the lower sliding seat, a drilling seat which is driven by a third drilling power machine to slide vertically is connected to the upper sliding seat, and a drilling motor is arranged on the drilling seat.

The sliding frame is connected to the rack in a sliding mode through a matching structure of the sliding block and the sliding rail, a power screw rod driven by a first power machine to rotate is connected to the rack in a rotating mode, and a nut in threaded connection with the power screw rod is mounted on the sliding frame.

The frame is equipped with the support frame that upwards stretches out, the slip frame sets up in one side of support frame, and the opposite side sliding connection of support frame has the balancing weight, is connected with the fixed pulley on the support frame, be connected with the connection rope that bypasses the fixed pulley between balancing weight and the slip frame.

The feeding and feeding device comprises a feeding frame, a plurality of feeding conveying supports which are longitudinally arranged and arranged at intervals are arranged on the feeding frame, at least two feeding conveying wheels which are transversely and oppositely arranged are arranged on the feeding conveying supports, feeding conveying belts are connected to the two transversely and oppositely arranged feeding conveying wheels, a plurality of conveying check blocks which are arranged along the surfaces of the feeding conveying belts at intervals are arranged on the feeding conveying belts, feeding conveying shafts are arranged on the plurality of longitudinally and oppositely arranged feeding conveying wheels in a penetrating mode and driven by feeding motor power, a feeding frame which corresponds to the processing platform and is driven by the feeding motor power to slide longitudinally is arranged on the feeding frame, and a material clamping hand which can clamp a section material is arranged on the feeding frame.

The straightening device is characterized in that the feeding frame is also provided with a straightening plate driven by a compaction straightening power machine to slide transversely, the feeding frame is provided with a plurality of retaining columns which are longitudinally arranged and arranged at intervals, retaining rings capable of rotating freely are connected onto the retaining columns, the straightening plate is positioned on one side of the retaining columns and is positioned at the output end of the feeding conveying belt, and the straightening plate can pull and attach the section bar to the retaining columns when sliding transversely.

The feeding frame is provided with a lower feeding sliding seat which is driven by a material clamping and feeding power machine to slide transversely, the lower feeding sliding seat is connected with an upper feeding sliding seat which is driven by the power machine to slide vertically, and the material clamping hand is connected with the upper feeding sliding seat.

Pay-off discharge apparatus includes the discharge frame, be equipped with on the discharge frame and correspond processing platform sets up and by the unloading motor power drive unloading slip frame that vertically slides, is equipped with the tong of unloading that can the centre gripping section bar on the unloading slip frame, still be connected with a plurality of discharge support that vertically arrange and the interval set up on the discharge frame, be equipped with two at least delivery wheels of unloading of horizontal relative setting on the discharge support, be connected with the conveyer belt of unloading on two horizontal relative delivery wheels of unloading, wear to be equipped with the transport axle of unloading on a plurality of vertical relative delivery wheels of unloading, the transport axle of unloading is by the motor power drive of unloading.

To sum up, the utility model discloses can realize automatic feeding, pay-off, saw cut, drilling and unload and the unloading work of section bar, have labor efficiency height, saw cut accurate advantage.

Drawings

The invention will be further described with reference to the accompanying drawings:

FIG. 1 is a schematic view of a profile being cut;

fig. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of sawing and drilling in the embodiment of FIG. 2;

FIG. 4 is a schematic top view of FIG. 3 rotated 90 degrees;

FIG. 5 is a schematic view of the left side view of FIG. 3;

FIG. 6 is a schematic view of the structure taken along line A-A of FIG. 5;

FIG. 7 is a schematic structural diagram of a feeding device in the embodiment of FIG. 2;

FIG. 8 is a schematic top view of FIG. 7;

FIG. 9 is a schematic structural view taken along line B-B in FIG. 7;

FIG. 10 is a schematic structural view of a feeding and discharging device in the embodiment of FIG. 2;

FIG. 11 is a schematic top view of FIG. 10;

FIG. 12 is a schematic structural view of sawing and drilling in another embodiment;

FIG. 13 is a schematic top view of FIG. 12;

fig. 14 is a perspective view of the punching mechanism of fig. 12.

Detailed Description

Referring to fig. 1, when a sectional material 100 is used as a door and window material to be sawn, a dotted line in fig. 1 is a cutting line, that is, a sectional material of a fixed length needs to be cut into several sections of door and window materials, in the cutting process, the sectional material needs to be cut into the door and window materials with end faces having an included angle of 45 degrees, the included angles of the two end faces of the door and window materials are arranged in opposite directions, and most of the existing methods are to saw a section, then turn over the sectional material, and then saw.

Referring to fig. 2, an embodiment of a material sawing machine is shown, the embodiment consists of three parts, namely a feeding device, a sawing device, a drilling device and a feeding and discharging device, arrow lines in the figure are the direction of the section, for convenience of description, the direction of the section is the longitudinal direction of the machine, and the following connection and installation can be understood as direct connection or indirect connection, and the indirect connection means that the connection or installation between two parts can be carried out through an intermediate part. The feeding and discharging device can automatically feed the profiles into the sawing and drilling holes at a constant speed, and the profiles after sawing and drilling holes can be taken out and sequentially unloaded. The three main parts are described below with reference to the accompanying drawings.

Referring to fig. 3 to 6, a sectional material sawing machine includes a frame 1, the frame 1 may be a structure in the figures, or may be other shapes, and its purpose is to support the sectional material, but not limited to the specific structure in the figures, a processing platform 10 for the sectional material to move longitudinally is provided on the frame 1, a sliding frame 2 driven by a first power machine to slide vertically is connected on the frame 1, two sawing seats 3 arranged at an interval up and down are provided on the sliding frame 2, cutting blades 4 driven by a sawing motor and arranged at a set angle with the direction of the sectional material are correspondingly connected on the two sawing seats 3, the projections of the two cutting blades 4 in a top view state are arranged in a vertical state, cutting grooves through which the cutting blades pass are provided on the processing platform 10, when the first power machine drives, the sliding frame 2 slides up and down, the state in the figures is a state in which the cutting blades below operate, of course, after the sliding frame slides downwards, the cutting blade 4 above can slide downwards, and the cutting blade above can saw the section bar. In this embodiment, the sliding frame 2 is slidably connected to a frame through a matching structure of a sliding block and a sliding rail, the frame is rotatably connected with a power screw 13 driven by a first power machine to rotate, and the sliding frame 2 is provided with a nut screwed with the power screw. The frame 1 is equipped with the support frame that upwards stretches out, the slip frame sets up in one side of support frame, and the opposite side sliding connection of support frame has balancing weight 14, is connected with fixed pulley 15 on the support frame, be connected with the connection rope that walks around the fixed pulley between balancing weight 14 and the slip frame. The structure setting of above-mentioned fixed pulley and balancing weight can make the slip of sliding frame more smooth and easy, reduces power take off and makes the location more accurate.

Referring to fig. 2 to 6, in order to more accurately position the profile, a positioning and pressing mechanism is mounted on the frame 1, the positioning and pressing mechanism includes two pressing seats 5 connected to the frame and spaced front and back, the pressing seats 5 are slidably connected to the frame and driven by a pressing power machine 7 to slide up and down, and a pressing plate 6 capable of pressing the profile in cooperation with the upper surface of the processing platform is disposed at the top of the pressing seats. The processing platform 10 is provided with a vertical plate 101 for the profile to lean against and slide, the frame 1 is further connected with an extrusion plate 12 corresponding to the pressing seat, the extrusion plate 12 is driven by an extrusion power machine connected to the frame to slide transversely, and the extrusion plate can be matched with the vertical plate to form a sliding groove for the profile to slide after sliding transversely. Through the structure, the pressing in the vertical direction of the section bar can be realized, the extrusion positioning in the horizontal direction of the section bar can also be realized, and the precision in sawing and drilling is ensured.

Referring to fig. 2 to 3, a drilling mechanism which is located on one side of a processing platform 10 and can drill a clamped section bar is further installed on the machine frame 1, the drilling mechanism includes a lower sliding seat 8 which is connected to the machine frame 1 and is driven by a first drilling power machine to slide transversely, an upper sliding seat 9 which is driven by a second drilling power machine to slide longitudinally is connected to the lower sliding seat 8, a drilling seat 11 which is driven by a third drilling power machine to slide vertically is connected to the upper sliding seat 9, a drilling motor is installed on the drilling seat, the sliding fit structure can adopt a sliding fit structure of a sliding block and a sliding rail, the drilling power machine can adopt an air cylinder, a drill bit is installed on the drilling motor, and the position of the drill bit can be ensured and accurate drilling can be realized through the transverse, longitudinal and vertical movements of the mechanism.

Referring to fig. 2 and 7 to 9, the feeding device includes a feeding frame 30, the feeding frame 30 is provided with a plurality of feeding conveying supports which are longitudinally arranged and spaced apart from each other, the feeding conveying supports are provided with at least two feeding conveying wheels 31 which are transversely opposite to each other, the two transversely opposite feeding conveying wheels 31 are connected with a feeding conveying belt 32, the feeding conveying belt 32 is provided with a plurality of conveying stoppers 33 which are spaced apart from each other along the surface of the feeding conveying belt, a feeding conveying shaft 34 penetrates through the plurality of longitudinally opposite feeding conveying wheels, the feeding conveying shaft is driven by a feeding motor, that is, the conveying wheels of the two adjacent conveying supports are on the same longitudinal straight line, the conveying stoppers 33 of the feeding conveying belts 32 of the two adjacent conveying supports are longitudinally arranged correspondingly, the longitudinally opposite plurality of conveying stoppers 33 are on the same longitudinal straight line, a section material is stopped by the conveying stoppers 33 and conveyed by the feeding conveying belts, a plurality of conveying wheels on the same longitudinal straight line are arranged on the same feeding conveying shaft in a penetrating manner, and in the embodiment, a plurality of feeding conveying belts 32 gradually become lower from front to back, so that the conveying of the section bars is facilitated. The feeding frame is provided with a feeding frame 35 which is arranged corresponding to the processing platform 10 and is driven by the power of a feeding motor to slide longitudinally, the feeding frame 35 is provided with a material clamping hand 36 which can clamp the section, a rod-shaped object in the figure is the material clamping hand, the material clamping end of the material clamping hand is two hinged clamping arms, and one clamping arm is driven to act, so that the two clamping arms clamp the section. In this embodiment, the feeding frame 35 is provided with a lower feeding sliding seat 39 which is driven by a material clamping and feeding power machine to slide laterally, the lower feeding sliding seat 39 is connected with an upper feeding sliding seat 40 which is driven by the power machine to slide vertically, and the material clamping hand is connected with the upper feeding sliding seat 40, so that the vertical position and the left-right position of the material clamping hand 36 can be adjusted through the power drive of the material clamping and feeding power machine and the power machine, and the section bar can be clamped accurately. The upper material rack 30 is also provided with a straightening plate 37 driven by a compression straightening power machine to slide transversely, the upper material rack 30 is provided with a plurality of blocking columns 38 which are longitudinally arranged and arranged at intervals, the blocking columns are connected with blocking rings capable of rotating freely, the straightening plate is positioned at one side of the blocking columns and positioned at the output end of the feeding conveyer belt, the section can be pulled and attached to the blocking columns when the straightening plate slides transversely, the feeding conveyer belt 32 conveys the section to the direction of a material clamping hand, and the section is further straightened through the compression straightening effect of the straightening plate before being conveyed to a proper position to clamp the section, so that the accuracy of sawing and drilling is improved.

Referring to fig. 2, 10 and 11, the feeding and discharging device includes a discharging frame 50, a discharging sliding frame 41 which is arranged corresponding to the processing platform 10 and is driven by a discharging motor to slide longitudinally is mounted on the discharging frame 50, a discharging clamping handle 42 which can clamp the profile is mounted on the discharging sliding frame 41, a plurality of discharging supports 43 which are arranged longitudinally and are arranged at intervals are further connected on the discharging frame 50, at least two discharging conveying wheels 44 which are arranged transversely and oppositely are mounted on the discharging supports 43, discharging conveying belts 45 are connected on the two discharging conveying wheels 44 which are arranged transversely and oppositely, discharging conveying shafts 46 are mounted on the discharging conveying wheels 44 which are arranged longitudinally and oppositely and driven by the discharging motor. That is to say, the discharging conveying wheels on the two adjacent discharging brackets are on the same longitudinal straight line, and a plurality of discharging conveying wheels on the same longitudinal straight line are mounted on the same discharging conveying shaft 46 in a penetrating manner.

Referring to fig. 12 to 14, in this embodiment, the sawing and drilling portion further adds a punching function to punch a hole on the surface of the profile to form a drainage hole, the structure of the sawing and drilling portion in this embodiment is the same as that in the above embodiment, and the detailed structure thereof will not be described in detail here, the processing platform 10 is further connected with a clamping mechanism and a diversion pressing mechanism which are arranged at a distance from each other, and a punching mechanism located between the clamping mechanism and the diversion pressing mechanism is mounted on the processing platform. The guide pressing mechanism comprises a translation roller 60 and a calm roller 61 which are connected with the front part of the processing platform and are transversely arranged oppositely, a section channel penetrates through the translation roller 60 and the calm roller 61, the processing platform 10 is connected with a translation cylinder 62 which can push the translation roller to the calm roller, the front part of the processing platform is also provided with an upper moving roller 63 and a lower calm roller 64 which are vertically arranged oppositely, the section channel penetrates through the translation cylinder 62 and the lower calm roller 64, the processing platform 10 is connected with a vertical cylinder 65 which can push the upper moving roller 63 to the lower calm roller 64, the structure can guide and straighten the section, the upper moving roller 63 and the lower calm roller 64 can clamp and press the rear section, and the vibration is avoided in the section bar processing process, and the processing precision is ensured. The processing platform 10 is provided with a vertical plate 101 for the profile to lean against and slide, the clamping mechanism comprises a clamping plate 26 connected to the processing platform 10 in a sliding manner, and the clamping plate 26 is driven by a pressing power machine connected to the rack to slide transversely and can be matched with the vertical plate to clamp the profile after sliding transversely. The punching mechanism comprises a punching table 21 connected to a machining platform, an upper punching die 22 which is vertically arranged and driven by a punching power machine to move up and down is arranged on the punching table 21, the punching power machine can be an oil cylinder or an air cylinder, a lower punching die 23 positioned below the upper punching die is connected to the machining platform, and an adjusting device used for adjusting the position of the punching table is further connected to the machining platform. The adjusting device comprises a punching sliding seat 24 which is transversely connected to the processing platform 10 in a sliding manner, the punching platform is connected to the punching sliding seat 24, a punching sliding power machine which drives the punching sliding seat to slide is arranged on the processing platform, the punching platform can be positioned right above the section through the power drive of the punching sliding power machine, the punching blanking effect is ensured, and in addition, when the punching function is not used, the punching platform can be far away from the section.

The utility model discloses do not receive the restriction of above-mentioned embodiment, at this technical field personnel, based on the utility model discloses the equivalent change and the part replacement of last concrete structure are all in the protection scope of the utility model. Additionally, the utility model discloses not only can be used for saw cutting and drilling of door and window section bar, also can be used to other section bars.

Claims (10)

1. The utility model provides a section bar saw cuts machine, includes frame (1), is equipped with processing platform (10) that supply the section bar to vertically move in frame (1), characterized by: the utility model discloses a cutting machine, including frame (1), frame (2), two cutting seats (3) that saw cut, frame (1) is last to be connected with by the vertical frame (2) that slides of first engine drive, two of interval setting about being equipped with on frame (2) saw cut seat (3), two saw cut seat (3) go up to correspond to be connected with by saw cutting motor drive and be cutting piece (4) of setting for the contained angle setting with section bar traffic direction, two cutting piece (4) are the vertical state setting in the projection under overlooking the state, are equipped with the cutting groove that worker's cutting piece passed on processing platform (10), location hold-down mechanism is equipped with on frame (1), still is equipped with on frame (1) to be located processing platform (10) one side and can carry out the drilling mechanism of driling to pressing from both sides tight section bar.

2. The profile sawing machine according to claim 1, wherein: the positioning and pressing mechanism comprises two pressing seats (5) which are connected to the rack and arranged at intervals in the front-back direction, the pressing seats (5) are connected to the rack in a sliding mode and driven by a pressing power machine (7) to slide up and down, and a pressing plate (6) capable of being matched with the upper surface of the machining platform to press the profile is arranged at the top of each pressing seat.

3. The profile sawing machine according to claim 2, wherein: the processing platform (10) is provided with a vertical plate (101) for the profile to lean against and slide, the rack (1) is further connected with an extrusion plate (12) corresponding to the compression seat, the extrusion plate (12) is driven by an extrusion power machine connected to the rack to slide transversely, and the extrusion plate can be matched with the vertical plate to form a sliding groove for the profile to slide after sliding transversely.

4. The profile sawing machine according to claim 1, wherein: the drilling mechanism comprises a lower sliding seat (8) which is connected to the rack (1) and driven by a first drilling power machine to slide transversely, an upper sliding seat (9) which is driven by a second drilling power machine to slide longitudinally is connected to the lower sliding seat (8), a drilling seat (11) which is driven by a third drilling power machine to slide vertically is connected to the upper sliding seat (9), and a drilling motor is arranged on the drilling seat.

5. The profile sawing machine according to any one of claims 1 to 4, wherein: the sliding frame (2) is connected to the rack in a sliding mode through a matching structure of a sliding block and a sliding rail, a power screw rod (13) driven by a first power machine to rotate is connected to the rack in a rotating mode, and a nut in threaded connection with the power screw rod is installed on the sliding frame (2).

6. The profile sawing machine according to claim 5, wherein: the support frame that upwards stretches out is equipped with in frame (1), the slip frame sets up in one side of support frame, and the opposite side sliding connection of support frame has balancing weight (14), is connected with fixed pulley (15) on the support frame, be connected with the connection rope that walks around the fixed pulley between balancing weight (14) and the slip frame.

7. The profile sawing machine according to any one of claims 1 to 4, wherein: the feeding and feeding device comprises a feeding frame (30), a plurality of feeding conveying supports which are longitudinally arranged and arranged at intervals are arranged on the feeding frame (30), at least two feeding conveying wheels (31) which are transversely and oppositely arranged are arranged on the feeding conveying supports, a feeding conveying belt (32) is connected onto the two transversely and oppositely arranged feeding conveying wheels (31), a plurality of conveying check blocks (33) which are arranged along the surface of the feeding conveying belt (32) at intervals are arranged on the feeding conveying belts, feeding conveying shafts (34) penetrate through the plurality of longitudinally and oppositely arranged feeding conveying wheels and are driven by a feeding motor, a feeding frame (35) which corresponds to the processing platform (10) and is driven by the feeding motor to longitudinally slide is arranged on the feeding frame (35), and a clamping hand (36) capable of clamping a section bar is arranged on the feeding frame (35).

8. The profile sawing machine according to claim 7, wherein: the feeding frame (30) is also provided with a straightening plate (37) which is driven by a compaction straightening power machine to slide transversely, the feeding frame (30) is provided with a plurality of blocking columns (38) which are arranged longitudinally and arranged at intervals, the blocking columns are connected with blocking rings capable of rotating freely, the straightening plate is positioned on one side of the blocking columns and positioned at the output end of the feeding conveying belt, and the straightening plate can pull and attach the section bar to the blocking columns when sliding transversely.

9. The profile sawing machine according to claim 7, wherein: the feeding frame (35) is provided with a lower feeding sliding seat (39) which is driven by a material clamping and feeding power machine to slide transversely, the lower feeding sliding seat (39) is connected with an upper feeding sliding seat (40) which is driven by the power machine to slide vertically, and the material clamping hand is connected with the upper feeding sliding seat (40).

10. The profile sawing machine according to any one of claims 1 to 4, wherein: pay-off discharge apparatus includes unloading frame (50), be equipped with on unloading frame (50) and correspond processing platform (10) set up and by unloading motor power drive vertically gliding unloading sliding frame (41), unloading clamping tongs (42) that can the centre gripping section bar are equipped with on unloading sliding frame (41), still be connected with a plurality of discharge support (43) of vertically arranging and interval setting on unloading frame (50), be equipped with two at least delivery wheels (44) of unloading that transversely set up relatively on discharge support (43), be connected with on two transversely relative delivery wheels (44) of unloading conveyer belt (45), wear to be equipped with on a plurality of vertically relative delivery wheels (44) and unload transport axle (46), unload transport axle by the motor power drive of unloading.

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