CN112238260A

CN112238260A - Building engineering bar cutting device

Info

Publication number: CN112238260A
Application number: CN202011161630.9A
Authority: CN
Inventors: 罗仁富
Original assignee: 罗仁富
Current assignee: Anhui xiongkang Construction Engineering Co.,Ltd.
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-01-19
Anticipated expiration: 2040-10-27
Also published as: CN112238260B

Abstract

The invention relates to the technical field of building devices, in particular to a building engineering bar cutting device which comprises a cutting box body, wherein a material guide bottom plate is fixed at one end of the bottom inside the cutting box body, a movable supporting plate is connected to the top of the cutting box body in a sliding mode, push-pull handles are fixed on two sides of the movable supporting plate, and rotating motors are fixed on two sides of the top of the movable supporting plate through screws. According to the device, the bar stock is more conveniently fixed through the structural design of the clamping mechanism, the working efficiency of the device is improved, the bar stock is more firmly fixed, the movable supporting plate, the rotating motor, the connecting shaft, the fixed disc and the clamping mechanism are matched with each other, so that the cutting efficiency of the device cannot be influenced when the material is changed, the working efficiency of the device is greatly improved, and dust generated when the bar stock is cut cannot pollute the surrounding environment through the structural design of the dust-fall processing mechanism, so that the device is more environment-friendly.

Description

Building engineering bar cutting device

Technical Field

The invention relates to the technical field of building devices, in particular to a constructional engineering bar stock.

Background

Building engineering, which refers to an engineering entity formed by the construction of various building buildings and auxiliary facilities thereof and the installation activities of lines, pipelines and equipment matched with the building buildings, bars are often used in the building engineering, some bars need to be cut by using a cutting device so as to be convenient for the use of the bars, however, the existing bar cutting device is not convenient for the clamping and fixing of the bars, more time is needed to be spent before the bars are fixed, the working efficiency of the device is not convenient and fast to use, the bars are not firmly fixed, the cutting of the bars is easy to be influenced, and a long time is needed to stop the machine to replace a batch of bars after a batch of bars are cut, so that the efficiency of the device is not ideal enough, the dust fall treatment cannot be carried out when the bars are cut, dust generated during the cutting easily pollutes the surrounding environment, and is inconvenient for subsequent cleaning operations.

Disclosure of Invention

The invention aims to provide a bar cutting device for constructional engineering.

In order to achieve the purpose, the invention adopts the following technical scheme:

a bar cutting device for constructional engineering comprises a cutting box body, a material guide bottom plate is fixed at one end of the bottom inside the cutting box body, the top of the cutting box body is connected with a movable supporting plate in a sliding way, both sides of the movable supporting plate are fixed with a push-pull handle, the two sides of the top of the movable supporting plate are both fixed with rotating motors by screws, the output ends of the rotating motors are both fixed with connecting shafts through the movable supporting plate, the bottom of the connecting shaft is fixed with a fixed disc, the bottom of the fixed disc is uniformly fixed with a plurality of clamping mechanisms, the two sides of the cutting box body are both connected with a box door through hinges, one side of the box door, which is far away from the cutting box body, is welded with a door handle, fastening bolts are in threaded connection with the top of the cutting box body, the top of the movable supporting plate and two ends of the rotating motor, and adjusting knobs are welded on the tops of the fastening bolts;

the other end of the bottom inside the cutting box body is fixedly provided with two guide rails, the tops of the two guide rails are connected with an installation bottom plate in a sliding mode, one end, located at the bottom of the installation bottom plate and far away from the material guide bottom plate, inside the cutting box body is fixedly provided with a transverse adjusting electric push rod, the output end of the transverse adjusting electric push rod is fixed with the installation bottom plate, the two sides of the top of the installation bottom plate are fixedly provided with height adjusting electric push rods through screws, the output end of the height adjusting electric push rod is fixedly provided with a cutting support plate, the top of the cutting support plate is fixedly provided with a cutting mechanism, the cutting mechanism comprises a cutting motor and a cutting blade;

the fixture includes a fixed cylinder, a mounting plate, a driving motor, a small transmission gear, a large transmission gear, a rotating support shaft, a clamping adjusting disc, a clamping adjusting spiral belt, four clamping adjusting plates, four clamping jaws and four clamping cushions, the mounting plate is fixed in the fixed cylinder, the driving motor is fixed at one end of the top of the mounting plate, the output end of the driving motor runs through the mounting plate, the small transmission gear is fixed at the output end of the driving motor, the rotating support shaft is rotatably connected at the middle part of the mounting plate, the large transmission gear is welded at the outer side of the rotating support shaft, the clamping adjusting disc is welded at the bottom of the rotating support shaft, the clamping adjusting spiral belt is fixed at the bottom of the clamping adjusting disc, and four clamping adjusting plates are uniformly and slidably connected at the bottom of the fixed cylinder and positioned at the, the four clamping jaws are respectively fixed at the bottoms of the four clamping adjusting plates, and the four clamping soft pads are respectively fixed at the inner sides of the four clamping jaws.

Preferably, the movable supporting plate and the push-pull handle are connected through welding, and anti-skid grains are uniformly distributed on the outer side of the push-pull handle.

Preferably, the fixed cylinder, the fixed disc, the driving motor and the mounting plate are fixed through screws.

Preferably, the small transmission gear and the large transmission gear are connected through meshing.

Preferably, a roller bearing is sleeved inside the mounting plate, and the mounting plate is rotatably connected with the rotating support shaft through the roller bearing.

Preferably, the fixed cylinder and the mounting plate, the clamping adjusting plate and the clamping jaw are connected through welding.

Preferably, the clamping jaw is connected with the clamping cushion through gluing, and the clamping cushion is made of polyurethane rubber.

Preferably, the dust fall mouth has all been seted up to the both sides of cutting box and the bottom that is located the chamber door, the inside of dust fall mouth all is fixed with dust fall processing mechanism, dust fall processing mechanism is including a dust fall section of thick bamboo, dust fall fan, first filter layer, second filter layer, play gas board and a plurality of venthole, the dust fall fan is fixed in the inside one side of a dust fall section of thick bamboo, it is fixed in the inside opposite side of a dust fall section of thick bamboo, and is a plurality of to give vent to anger the venthole equipartition is seted up in the inside of a gas board, the second filter layer is fixed in the inside one side that is close to a gas board of a dust fall section of thick bamboo, first filter layer is fixed in the.

Preferably, the threaded grooves are formed in the inner side of the dust falling opening and the outer side of the dust falling cylinder, and the dust falling cylinder is connected with the dust falling opening through threads.

Preferably, the first filter layer is made of non-woven fabric filter cotton, and the second filter layer is made of honeycomb activated carbon.

The invention has at least the following beneficial effects:

1. through the structural design of the clamping mechanism, the device can greatly reduce the time spent on fixing the bar before cutting, so that the device can fix the bar more conveniently, the working efficiency of the device is improved, the bar is fixed more firmly, the subsequent cutting of the bar is facilitated, and the movable supporting plate, the rotating motor, the connecting shaft, the fixed disc and the clamping mechanism are matched with each other, so that the cutting efficiency of the device cannot be influenced when the device is used for changing materials, and the working efficiency of the device is greatly improved;

2. through the structural design of dust fall processing mechanism for the dust that the device produced when the bar cutting can not cause the pollution to the surrounding environment, makes the result of use of device better, environmental protection more.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of the overall front view of the present invention;

FIG. 2 is a rear view of the present invention;

FIG. 3 is a sectional view of the cutting box;

FIG. 4 is a schematic view of the connection structure of the movable support plate and the push-pull handle, the fixed disk and the clamping mechanism;

FIG. 5 is a schematic structural view of the clamping mechanism;

FIG. 6 is a schematic view of a connection structure of a fixed cylinder with a clamping adjustment spiral band and a clamping adjustment plate;

fig. 7 is a schematic view of a connection structure of the dustfall processing mechanism;

fig. 8 is an exploded view of the dustfall processing mechanism.

In the figure: 1. cutting the box body; 2. a material guide bottom plate; 3. a movable support plate; 4. a rotating electric machine; 5. a connecting shaft; 6. fixing the disc; 7. a clamping mechanism; 8. a push-pull handle; 9. a guide rail; 10. mounting a bottom plate; 11. transversely adjusting the electric push rod; 12. a height adjustment electric push rod; 13. cutting the supporting plate; 14. a cutting mechanism; 15. a box door; 16. a fixed cylinder; 17. mounting a plate; 18. a drive motor; 19. a small drive gear; 20. a large transmission gear; 21. rotating the support shaft; 22. clamping the adjusting disc; 23. clamping the adjusting spiral belt; 24. clamping the adjusting plate; 25. clamping jaws; 26. clamping the soft cushion; 27. a dust fall processing mechanism; 28. a dust falling cylinder; 29. a dust fall fan; 30. a first filter layer; 31. a second filter layer; 32. an air outlet plate; 33. and an air outlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1:

referring to fig. 1-8, a bar cutting device for construction engineering comprises a cutting box body 1, wherein a guide bottom plate 2 is fixed at one end of the bottom inside the cutting box body 1, a movable supporting plate 3 is slidably connected to the top of the cutting box body 1, push-pull handles 8 are fixed on two sides of the movable supporting plate 3, a rotating motor 4 is fixed on two sides of the top of the movable supporting plate 3 through screws, a connecting shaft 5 is fixed at the output end of the rotating motor 4 and penetrates through the movable supporting plate 3, a fixed plate 6 is fixed at the bottom of the connecting shaft 5, a plurality of clamping mechanisms 7 are uniformly fixed at the bottom of the fixed plate 6, box doors 15 are connected to two sides of the cutting box body 1 through hinges, door handles are welded to one sides of the box doors 15 far away from the cutting box body 1, fastening bolts are connected to the top of the cutting box body 1, are in threaded connection with two ends;

the other end of the bottom inside the cutting box body 1 is fixedly provided with two guide rails 9, the tops of the two guide rails 9 are connected with an installation bottom plate 10 in a sliding mode, one end, located at the bottom of the installation bottom plate 10 and far away from the material guide bottom plate 2, inside the cutting box body 1 is fixedly provided with a transverse adjusting electric push rod 11, the output end of the transverse adjusting electric push rod 11 is fixedly provided with the installation bottom plate 10, the two sides of the top of the installation bottom plate 10 are fixedly provided with height adjusting electric push rods 12 through screws, the output end of the height adjusting electric push rod 12 is fixedly provided with a cutting support plate 13, the top of the cutting support plate 13 is fixedly provided with a cutting mechanism 14, the cutting mechanism;

the clamping mechanism 7 comprises a fixed cylinder 16, a mounting plate 17, a driving motor 18, a small transmission gear 19, a large transmission gear 20, a rotating support shaft 21, a clamping adjusting disk 22, a clamping adjusting spiral belt 23, four clamping adjusting plates 24, four clamping claws 25 and four clamping cushions 26, wherein the mounting plate 17 is fixed inside the fixed cylinder 16, the driving motor 18 is fixed at one end of the top of the mounting plate 17, the output end of the driving motor 18 penetrates through the mounting plate 17, the small transmission gear 19 is fixed at the output end of the driving motor 18, the rotating support shaft 21 is rotatably connected to the middle part of the mounting plate 17, the large transmission gear 20 is welded at the outer side of the rotating support shaft 21, the clamping adjusting disk 22 is welded at the bottom of the rotating support shaft 21, the clamping adjusting spiral belt 23 is fixed at the bottom of the clamping adjusting disk 22, the four clamping adjusting plates 24 are uniformly and slidably connected at, four clamping jaws 25 are fixed to the bottoms of the four clamping adjustment plates 24, respectively, and four clamping cushions 26 are fixed to the insides of the four clamping jaws 25, respectively.

The scheme has the following working processes:

when the device is used for clamping a bar, the device is electrically connected with an external power supply, then the top of the bar is placed on the inner sides of the four clamping cushions 26, the driving motor 18 is started, the output end of the driving motor 18 rotates and drives the small transmission gear 19 to rotate, the small transmission gear 19 drives the large transmission gear 20 to rotate through the meshing connection between the small transmission gear 19 and the large transmission gear 20, the large transmission gear 20 drives the rotating support shaft 21 to rotate, the rotating support shaft 21 drives the clamping adjusting disk 22 to rotate when rotating, the clamping adjusting spiral belt 23 is driven to rotate through the rotation of the clamping adjusting disk 22, the shape characteristic design of the clamping adjusting spiral belt 23 is realized, and the limit of the sliding connection between the clamping adjusting plate 24 and the fixed cylinder 16 is limited, so that the clamping adjusting plate 24 can move, the clamping adjusting plate 24 drives the clamping jaw 25 and the clamping cushion 26 to move, so that the bar is clamped and fixed, the time spent on fixing the bar before cutting can be greatly reduced, the bar can be fixed more conveniently by the device, the working efficiency of the device is improved, the bar is fixed more firmly, and the subsequent cutting of the bar is facilitated;

the bar stock is clamped in the clamping mechanisms 7 at the bottoms of the two fixed discs 6, when the cutting is carried out, the push-pull handle 8 is held to pull or push, so that the movable supporting plate 3 slides at the top of the cutting box body 1 to carry out position adjustment, one of the rotating motors 4 is positioned in the middle of the top of the cutting box body 1, then the adjusting knob is rotated to drive the fastening bolt to rotate, the fastening bolt can move downwards through the threaded connection between the fastening bolt and the cutting box body 1, so that the bottom of the fastening bolt can abut against the movable supporting plate 3, then the rotating motor 4 positioned in the middle of the top of the cutting box body 1 at the moment is started, so that the rotating motor 4 drives one of the fixed discs 6 to rotate, the bar stock clamped in the clamping mechanisms 7 at the bottom of the fixed disc 6 rotates along with the bar stock, and the cutting mechanism 14 is started, the cutting of the bar stock is carried out, the transverse position of the cutting mechanism 14 during working can be adjusted by extending and retracting the output end of the transverse adjusting electric push rod 11 by starting the transverse adjusting electric push rod 11, the height of the cutting mechanism 14 can be adjusted by extending and retracting the output end of the height adjusting electric push rod 12 by starting the height adjusting electric push rod 12, after the bar stock clamped in the clamping mechanism 7 at the bottom of one fixed disc 6 is cut, the adjusting knob is rotated reversely to drive the fastening bolt to rotate, so that the fastening bolt moves upwards, the bottom of the fastening bolt is not abutted against the movable supporting plate 3, then the push-pull handle 8 can be held to adjust the position of the movable supporting plate 3, the other fixed disc 6 is positioned in the middle of the top of the cutting box body 1, and then the movable supporting plate 3 is fixed by rotating the adjusting knob, the rotating motor 4 and the cutting mechanism 14 are started again to cut the bar clamped in the clamping mechanism 7 at the bottom of the fixed disc 6, the cut bar is located close to the box door 15 at the moment, the box door 15 can be opened, then the driving motor 18 is started to rotate reversely to carry out blanking on the cut bar, a new bar to be cut is clamped again after blanking, and at the moment, the bar clamped in the clamping mechanism 7 at the bottom of the other fixed disc 6 is being cut, so that the cutting efficiency of the device cannot be influenced when the device is changed, and the working efficiency of the device is greatly improved;

through starting dust fall fan 29 when the bar cuts, make dust fall fan 29 move the dust that produces the bar cutting and get into dust fall section of thick bamboo 28, utilize its material characteristic to filter the dust through first filter layer 30 and second filter layer 31, and fall dust section of thick bamboo 28 with air escape through venthole 33 after purifying, the dust that produces when making the bar cutting can not cause the pollution to the surrounding environment, make the result of use of device better, and environmental protection more, and through falling dust section of thick bamboo 28 and the threaded connection of dust fall mouth in the cutting box 1, make that can be convenient pull down dust fall processing mechanism 27 wholly, maintain dust fall processing mechanism 27.

According to the working process, the following steps are known:

1. through the structural design of the clamping mechanism 7, the device can greatly reduce the time spent on fixing the bar before cutting, so that the device can fix the bar more conveniently, the working efficiency of the device is improved, the bar is fixed more firmly, the subsequent cutting of the bar is facilitated, and the movable supporting plate 3, the rotating motor 4, the connecting shaft 5, the fixed disc 6 and the clamping mechanism 7 are matched with each other, so that the cutting efficiency of the device cannot be influenced when the material is changed, and the working efficiency of the device is greatly improved;

2. through the structural design of dust fall processing mechanism 27 for the dust that the device produced when the bar cutting can not cause the pollution to the surrounding environment, makes the result of use of device better, environmental protection more.

Furthermore, the movable supporting plate 3 and the push-pull handle 8 are connected through welding, anti-skid grains are uniformly distributed on the outer side of the push-pull handle 8, the push-pull handle 8 is convenient to use, and friction force between the push-pull handle 8 and a hand can be increased when the push-pull handle is used through the anti-skid grains.

Furthermore, the fixing cylinder 16, the fixing disc 6, the driving motor 18 and the mounting plate 17 are fixed through screws, so that the fixing effect is better.

Furthermore, the small transmission gear 19 and the large transmission gear 20 are connected in a meshed manner, so that power transmission is facilitated, and the rotating speed can be reduced and the use is more convenient due to the fact that the small transmission gear 19 and the large transmission gear 20 are arranged in different sizes; the meshing is a transmission relation between two mechanical parts, and has the characteristics of large application range, higher transmission efficiency, long service life, stable transmission, high reliability, constant instantaneous transmission ratio guarantee, realization of two-shaft transmission with various position requirements and the like.

Further, the roller bearing is sleeved in the mounting plate 17, the mounting plate 17 and the rotating support shaft 21 are rotatably connected through the roller bearing, and friction between the rotating support shaft 21 and the mounting plate 17 during rotation is effectively reduced.

Furthermore, the fixed cylinder 16 and the mounting plate 17, and the clamping adjusting plate 24 and the clamping jaws 25 are connected by welding, so that the fixed cylinder 16 and the mounting plate 17, and the clamping adjusting plate 24 and the clamping jaws 25 are fixed more firmly.

Further, the clamping jaw 25 and the clamping cushion 26 are connected through gluing, the clamping cushion 26 is made of polyurethane rubber, and the device is not easy to damage the bar when clamping the bar through the characteristics of high wear resistance and good elasticity of the polyurethane rubber.

Further, the dust fall mouth has all been seted up to the both sides of cutting box 1 and the bottom that is located chamber door 15, the inside of dust fall mouth all is fixed with dust fall processing mechanism 27, dust fall processing mechanism 27 is including falling a dirt section of thick bamboo 28, dust fall fan 29, first filter layer 30, second filter layer 31, air outlet plate 32 and a plurality of venthole 33, dust fall fan 29 is fixed in the inside one side of falling a dirt section of thick bamboo 28, air outlet plate 32 is fixed in the inside opposite side of falling a dirt section of thick bamboo 28, the inside of air outlet plate 32 is seted up to a plurality of venthole 33 equipartitions, second filter layer 31 is fixed in the inside one side that is close to air outlet plate 32 of falling a dirt section of thick bamboo 28, first filter layer 30 is fixed in the inside one side that is close to dust fall fan 29 of falling a dirt section of thick bamboo 28, make the dust that the device produced when the.

Further, thread grooves are formed in the inner side of the dust falling port and the outer side of the dust falling cylinder 28, the dust falling cylinder 28 and the dust falling port are connected through threads, and therefore the dust falling processing mechanism 27 is convenient to detach and maintain.

Furthermore, the first filter layer 30 is made of non-woven fabric filter cotton, and the second filter layer 31 is made of honeycomb activated carbon, so that a good dust filtering effect is formed.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The bar cutting device for the building engineering comprises a cutting box body (1) and is characterized in that a guide bottom plate (2) is fixed at one end of the bottom inside the cutting box body (1), a movable supporting plate (3) is connected to the top of the cutting box body (1) in a sliding mode, push-pull handles (8) are fixed to two sides of the movable supporting plate (3), rotating motors (4) are fixed to two sides of the top of the movable supporting plate (3) through screws, connecting shafts (5) are fixed to output ends of the rotating motors (4) through the movable supporting plate (3), a fixed disc (6) is fixed to the bottom of each connecting shaft (5), a plurality of clamping mechanisms (7) are fixed to the bottom of each fixed disc (6) in a uniformly distributed mode, box doors (15) are connected to two sides of the cutting box body (1) through hinges, and door handles are welded to one side, far away from the cutting box body (1), fastening bolts are in threaded connection with the top of the cutting box body (1), the top of the movable supporting plate (3) and two ends of the rotating motor (4), and adjusting knobs are welded on the tops of the fastening bolts;

two guide rails (9) are fixed at the other end of the bottom inside the cutting box body (1), the tops of the two guide rails (9) are connected with a mounting bottom plate (10) in a sliding manner, a transverse adjusting electric push rod (11) is fixed at one end of the mounting bottom plate (10) far away from the material guide bottom plate (2) in the cutting box body (1), the output end of the transverse adjusting electric push rod (11) is fixed with the mounting bottom plate (10), the two sides of the top of the mounting bottom plate (10) are both fixed with height adjusting electric push rods (12) by screws, a cutting support plate (13) is fixed at the output end of the height adjusting electric push rod (12), a cutting mechanism (14) is fixed at the top of the cutting support plate (13), the cutting mechanism (14) comprises a cutting motor and a cutting blade, and the cutting blade is fixed at the output end of the cutting motor;

the clamping mechanism (7) comprises a fixed cylinder (16), a mounting plate (17), a driving motor (18), a small transmission gear (19), a large transmission gear (20), a rotating support shaft (21), a clamping adjusting disc (22), a clamping adjusting spiral belt (23), four clamping adjusting plates (24), four clamping claws (25) and four clamping cushions (26), wherein the mounting plate (17) is fixed in the fixed cylinder (16), the driving motor (18) is fixed at one end of the top of the mounting plate (17), the output end of the driving motor (18) penetrates through the mounting plate (17), the small transmission gear (19) is fixed at the output end of the driving motor (18), the rotating support shaft (21) is rotatably connected with the middle part of the mounting plate (17), the large transmission gear (20) is welded at the outer side of the rotating support shaft (21), the clamping adjusting disc (22) is welded at the bottom of the rotating support shaft (21), spiral area (23) are fixed in the bottom of centre gripping adjusting disk (22), four centre gripping adjusting plate (24) equipartition sliding connection just is located the bottom of centre gripping adjusting spiral area (23) in the bottom of solid fixed cylinder (16), four centre gripping jack catch (25) are fixed in four respectively the bottom of centre gripping adjusting plate (24), four centre gripping cushion (26) are fixed in four respectively the inboard of centre gripping jack catch (25).

2. The cutting device for the constructional engineering bar stock as claimed in claim 1, wherein the movable support plate (3) and the push-pull handle (8) are connected through welding, and anti-skid threads are uniformly distributed on the outer side of the push-pull handle (8).

3. A cutting device for construction engineering bars according to claim 1, characterized in that the fixed cylinder (16) and the fixed disc (6), the driving motor (18) and the mounting plate (17) are fixed by screws.

4. A cutting device for construction work bar stock according to claim 1, characterized in that the small transmission gear (19) and the large transmission gear (20) are connected by meshing.

5. A cutting device for construction engineering bar stock according to claim 1, characterized in that a roller bearing is sleeved inside the mounting plate (17), and the mounting plate (17) and the rotating support shaft (21) are rotatably connected through the roller bearing.

6. A cutting device for construction work bar stock according to claim 1, characterized in that the fixed cylinder (16) and the mounting plate (17), the clamping adjusting plate (24) and the clamping jaws (25) are connected by welding.

7. A cutting device for construction work bar stock according to claim 1, characterized in that the clamping jaws (25) and the clamping cushions (26) are connected by gluing, the clamping cushions (26) being made of polyurethane rubber.

8. A cutting device for construction bar stock according to claim 1, dust falling ports are formed in the two sides of the cutting box body (1) and at the bottom of the box door (15), a dust fall processing mechanism (27) is fixed inside each dust fall opening, the dust fall processing mechanism (27) comprises a dust fall barrel (28), a dust fall fan (29), a first filter layer (30), a second filter layer (31), an air outlet plate (32) and a plurality of air outlets (33), the dust falling fan (29) is fixed at one side inside the dust falling cylinder (28), the air outlet plate (32) is fixed at the other side inside the dust falling cylinder (28), a plurality of air outlet holes (33) are uniformly distributed in the air outlet plate (32), the second filter layer (31) is fixed at one side of the interior of the dust falling cylinder (28) close to the air outlet plate (32), the first filter layer (30) is fixed on one side, close to the dust falling fan (29), of the dust falling barrel (28).

9. The cutting device for constructional engineering bar stock as recited in claim 8, wherein the dust falling opening and the dust falling cylinder (28) are provided with threaded grooves on the inner side and the outer side respectively, and the dust falling cylinder (28) is in threaded connection with the dust falling opening.

10. The cutting device for bar stock in building engineering according to claim 8, characterized in that the material of the first filter layer (30) is non-woven fabric filter cotton, and the material of the second filter layer (31) is honeycomb activated carbon.