CN116214636A

CN116214636A - Intelligent sawing machine

Info

Publication number: CN116214636A
Application number: CN202310390328.8A
Authority: CN
Inventors: 付家坤; 陈志华; 杜璟; 周健; 洪兵
Original assignee: Engineering Technology Branch Of Tongling Nonferrous Metals Group Co ltd
Current assignee: Engineering Technology Branch Of Tongling Nonferrous Metals Group Co ltd
Priority date: 2023-04-13
Filing date: 2023-04-13
Publication date: 2023-06-06

Abstract

The invention discloses an intelligent sawing machine which comprises a plate conveyer, a plate cutting machine and a plate adjusting machine, wherein the top of one end of the plate conveyer is movably connected with the bottom of the plate cutting machine, the other end of the plate conveyer is movably connected with one end of the plate adjusting machine, the plate adjusting machine comprises a bottom frame, two image acquisition devices are symmetrically and movably arranged at the top of one end of the bottom frame, displacement grooves are formed in the tops of two sides of the bottom frame, plate clamping pieces are movably arranged on the inner sides of the tops of the displacement grooves, and a hydraulic adjusting rod is fixedly arranged at the bottom of the inner side of the bottom frame. This intelligent sawing machine utilizes electromagnetism absorption and negative pressure absorption principle, has realized panel automatic positioning, upset and adjustment cutting angle, has avoided artifical transport panel waste time and energy and the problem that cutting accuracy descends for the sawing machine is more intelligent, automatic, has greatly reduced the process of manual transport when cutting the panel, has promoted panel cutting's efficiency and cutting accuracy.

Description

Intelligent sawing machine

Technical Field

The invention relates to the technical field of sawing machines, in particular to an intelligent sawing machine.

Background

The sawing machine uses the saw as a cutter, and cuts and divide timber through the reciprocating motion of the strip saw or the band saw or the rotary motion of the circular saw, and when the traditional sawing machine cuts materials, the traditional sawing machine needs to manually carry and adjust the cutting angle and the cutting path of the plate on the sawing machine so as to finish the process of cutting the plate into different sizes and shapes, but along with the gradual development of technology, the sawing machine also gradually adds an intelligent function, so that the sawing machine is more automatic.

In the prior art, for example, the Chinese patent number is: the efficient intelligent circular sawing machine of CN 106735549B comprises a machine tool base, wherein a feeding part is arranged on the machine tool base, a driving unit for providing a power source effect is arranged on the feeding part, a sliding seat is connected onto the driving unit in a sliding manner, and an adjusting device for adjusting the position of a workpiece is arranged on the sliding seat; the front end of the feeding part is provided with a clamping part fixed on the machine tool base; the side part of the clamping part is provided with a cutting part rotationally connected to the machine tool base; a dragging device is arranged between the clamping part and the cutting part; and the feeding part, the clamping part and the cutting part are all provided with sensors. The automatic feeding device has the advantages of reasonable structure and good use effect, the whole device realizes automatic feeding, automatic clamping and automatic sawing through the sensor, the device has the function of automatically adjusting work stations, the use range of the device is wide, meanwhile, the use effect of the cutting part is further improved through the dragging device between the clamping part and the cutting part, the positioning is accurate, the execution force is strong, the stroke amount is reduced, the time is saved, the efficiency is improved, the processing quality is good, and the popularization is worth.

But in the prior art, when the panel carries out two-sided cutting or fluting on the sawing machine, the panel can't realize panel automatic turn-over on the sawing machine, still need the manual work to carry and put the panel, after the manual work turns over the panel, still need fix a position the panel, not only reduced panel cutting efficiency, the manual work after the turn-over is put the location, still can lead to panel cutting accuracy greatly reduced.

We have therefore proposed an intelligent sawing machine in order to solve the problems set out above.

Disclosure of Invention

The invention aims to provide an intelligent sawing machine, which solves the problems that when a plate is cut or grooved on the sawing machine on two sides, the plate cannot be turned over automatically on the sawing machine, the plate is required to be carried and placed manually, and the plate is required to be positioned after being turned over manually, so that the cutting efficiency of the plate is reduced, the plate is placed and positioned manually after being turned over, and the cutting precision of the plate is greatly reduced.

In order to achieve the above purpose, the present invention provides the following technical solutions: the intelligent sawing machine comprises a plate conveyer, a plate cutting machine and a plate adjusting machine, wherein the top of one end of the plate conveyer is movably connected with the bottom of the plate cutting machine, and the other end of the plate conveyer is movably connected with one end of the plate adjusting machine;

the plate adjusting machine comprises a bottom frame, two image acquisition instruments are symmetrically and movably arranged at the top of one end of the bottom frame, displacement grooves are formed in the tops of two sides of the bottom frame, plate clamping pieces are movably arranged at the inner sides of the tops of the displacement grooves, hydraulic adjusting rods are fixedly arranged at the bottoms of the inner sides of the bottom frame, vacuum pumps are fixedly arranged at one sides of the bottoms of the hydraulic adjusting rods, supporting plates are movably arranged at the tops of the hydraulic adjusting rods, a plurality of anti-slip pads are uniformly and fixedly arranged at the outer sides of the tops of the supporting plates, grooves are formed in the positions of the axes of the supporting plates, adsorption discs are movably arranged at the inner sides of the grooves, the bottoms of the adsorption discs are communicated with the tops of the vacuum pumps, the plate clamping pieces comprise displacement motors, vertical plates are fixedly arranged at the bottoms of the displacement motors, sliding grooves are formed in penetrating through the tops of the vertical plates, lifting motors are fixedly arranged at one sides of the sliding grooves, and clamping pieces are fixedly arranged at one sides of the lifting motors.

Preferably, the clamping piece comprises a C-shaped plate, a plurality of electromagnets are uniformly and fixedly arranged at the top of the C-shaped plate, and an electromagnetic generator is fixedly arranged at the top end of each electromagnet.

Preferably, a plurality of magnetic attraction pieces are uniformly and movably arranged at the bottom end of the C-shaped plate, a rubber pad is movably arranged between the magnetic attraction pieces and the electromagnet, and one side of the rubber pad is fixedly arranged on the inner side of the C-shaped plate.

Preferably, the magnetic attraction piece comprises a mounting shell, the top of the mounting shell is fixedly mounted with the bottom of the C-shaped plate, two limit grooves are symmetrically formed in the inner side of the mounting shell, a strong magnet is movably mounted at the inner side top of the mounting shell, two limit blocks are symmetrically and fixedly mounted on two sides of the strong magnet, the outer side of the limit blocks is movably mounted with the inner side of the limit grooves, a reset spring is movably mounted at the bottom of the strong magnet, and the bottom of the reset spring is fixedly mounted with the bottom of the mounting shell.

Preferably, the plate conveyer comprises a base, a plurality of conveying rollers are uniformly and movably mounted at the top of the base, each conveying roller is sleeved with a bearing at the outer sides of two ends of the conveying roller, two ends of each conveying roller are fixedly provided with limiting ends, one end top of the base is fixedly provided with a fixing frame, and the inner side of the fixing frame is fixedly provided with a driving wheel.

Preferably, two driving belts are sleeved on the outer sides of two ends of the conveying roller, a plurality of supporting belts are uniformly and movably installed between the driving belts, and the inner side of each supporting belt is sleeved with the conveying roller.

Preferably, the transport roller comprises a cross rod, a plurality of anti-skid sleeves are uniformly and fixedly arranged on the outer side of the cross rod, limiting sleeves are symmetrically and fixedly arranged at the two ends of the cross rod, the outer side of each limiting sleeve is movably connected with the inner side of the transmission belt, a plug rod is fixedly arranged at one end of each limiting sleeve, and the outer side of each plug rod is movably arranged on the inner side of each bearing.

Preferably, the material receiving part is fixedly arranged on the inner side of the bottom of the base, a plurality of suction ends are uniformly and fixedly arranged at one end of the material receiving part, a filter is fixedly arranged on the inner side of each suction end, and one ends of the suction ends are communicated with a suction machine.

Preferably, the plate cutting machine comprises a vertical frame, the bottom of the vertical frame is fixedly arranged at the top of the base, a sliding rail is fixedly arranged on the lower surface of the top of the vertical frame, a displacement member is movably arranged on the inner side of the sliding rail, a lifting rod is movably arranged at the bottom of the displacement member, a sawing machine is fixedly arranged at the bottom of the lifting rod, and a saw blade is movably arranged at the bottom of the front side of the sawing machine.

Compared with the prior art, the invention has the beneficial effects that:

1. through the arrangement of the plate adjusting machine, when the plate needs to be rotated or the cutting angle is adjusted, the adsorption disc at the axis of the support plate is tightly adsorbed at the bottom of the plate due to the suction effect of the vacuum pump, the position and the placing angle information of the plate are acquired through the image acquisition instrument, the path of cutting the plate again is determined along with the adjustment of the hydraulic adjusting rod, the plate is transported to the bottom of the plate cutting machine to be cut again by the plate transporting machine, the plate can be firmly clamped by utilizing the negative pressure effect of the adsorption disc, the problem that the surface of the plate is damaged due to clamping is also avoided, and the processing quality of the plate is improved;

2. through the arrangement of the plate adjusting machine, the automatic positioning, overturning and cutting angle adjustment of the plates are realized by utilizing the electromagnetic adsorption and negative pressure adsorption principles, the problems that manual plate conveying is time-consuming and labor-consuming and the cutting precision is reduced are avoided, the sawing machine is more intelligent and automatic, the manual plate conveying process is greatly reduced when the plates are cut, and the plate cutting efficiency and the plate cutting precision are improved;

3. through the setting of panel conveyer and panel cutting machine, realized that the panel cuts the back, the cutting waste material will drop to the receiving piece of bottom through between the transport roller, and the cutting sweeps can be adsorbed to receiving piece by the suction end in, the sweeps splashes when avoiding cutting the panel, pollute the processing environment, simultaneously, the saw can adjust the saw bit under the accuse of lifter to the cutting depth of panel, can satisfy the panel and cut and grooved two kinds of operations, saw still accessible displacement piece carries out horizontal regulation in the slide rail bottom for the panel is when the transportation, and the saw bit can carry out arc route cutting on the panel, has promoted saw functionality and practicality.

Drawings

FIG. 1 is a perspective view of the front side of an intelligent sawing machine according to the present invention;

FIG. 2 is a perspective view of the rear side of an intelligent sawing machine according to the present invention;

FIG. 3 is a perspective view of the bottom of an intelligent sawing machine according to the present invention;

FIG. 4 is a perspective view of the intelligent sawing machine plate cutter according to the present invention;

FIG. 5 is a schematic diagram of an intelligent sawing machine board conveyor according to the present invention;

FIG. 6 is a schematic view of the structure of an intelligent sawing machine transporting roller according to the present invention;

FIG. 7 is a schematic diagram of an intelligent sawing machine board conditioner according to the present invention;

FIG. 8 is a schematic view of an intelligent sawing machine clamp according to the present invention;

fig. 9 is a schematic structural view of a magnetic attraction piece of an intelligent sawing machine clamping piece.

In the figure:

1. a plate conveyer; 2. a sheet cutting machine; 3, a plate adjusting machine; 30. a chassis; 31. an image acquisition instrument; 301. a displacement groove; 36. a sheet clamping member; 33. a hydraulic adjustment lever; 32. a vacuum pump; 34. a support plate; 35. an anti-slip pad; 340. a groove; 320. an adsorption plate; 360. a displacement motor; 365. a vertical plate; 364. a chute; 362. a lifting motor; 361. a clamping piece; 390. a C-shaped plate; 392. an electromagnet; 391. an electromagnetic generator; 394. a magnetic attraction piece; 393. a rubber pad; 380. a mounting shell; 381. a limit groove; 383. strong magnet; 382. a limiting block; 384. a return spring; 10. a base; 13. a transport roller; 14. a bearing; 15. a limiting end head; 11. a fixing frame; 12. a driving wheel; 16. a transmission belt; 17. a support belt; 13. a transport roller; 130. a cross bar; 131. an anti-skid sleeve; 132. a limit sleeve; 133. a rod; 18. a receiving piece; 19. a suction tip; 191. a filter; 190. a suction machine; 20. a vertical frame; 21. a slide rail; 22. a displacement member; 23. a lifting rod; 24. sawing machine; 25. and (5) a saw blade.

Description of the embodiments

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Examples

Referring to fig. 1-9, the present invention provides a technical solution: an intelligent sawing machine comprises a plate conveyer 1, a plate cutting machine 2 and a plate adjusting machine 3, wherein one end top of the plate conveyer 1 is movably connected with the bottom of the plate cutting machine 2, the other end of the plate conveyer 1 is movably connected with one end of the plate adjusting machine 3, the plate adjusting machine 3 comprises a bottom frame 30, two image acquisition devices 31 are symmetrically and movably arranged at one end top of the bottom frame 30, displacement grooves 301 are respectively arranged at the tops of two sides of the bottom frame 30, plate clamping pieces 36 are movably arranged at the inner sides of the tops of the displacement grooves 301, a hydraulic adjusting rod 33 is fixedly arranged at the inner bottom of the bottom frame 30, a vacuum pump 32 is fixedly arranged at one side of the bottom of the hydraulic adjusting rod 33, a supporting plate 34 is movably arranged at the top of the hydraulic adjusting rod 33, a plurality of anti-slip pads 35 are uniformly and fixedly arranged at the outer sides of the top of the supporting plate 34, grooves 340 are arranged at the axle center of the supporting plate 34, and the inside movable mounting of recess 340 has adsorption disc 320, adsorption disc 320's bottom is linked together with vacuum pump 32's top, panel holder 36 includes displacement motor 360, displacement motor 360's bottom and displacement groove 301's inside movable mounting, displacement motor 360's top fixed mounting has riser 365, the spout 364 has been seted up in the top of riser 365, the inboard movable mounting of spout 364 has elevator motor 362, elevator motor 362's one side fixed mounting has fastener 361, fastener 361 includes C template 390, a plurality of electro-magnet 392 of even fixed mounting in C template 390's top, electromagnetic generator 391 is all fixed to each electro-magnet 392's top, a plurality of magnetism pieces 394 are evenly movable mounting in C template 390's bottom, movable mounting has rubber pad 393 between magnetism pieces 394 and the electro-magnet 392, one side of rubber pad 393 and the inboard fixed mounting of C template 390, magnetism pieces 394 include installation shell 380, the top of installation shell 380 and the bottom fixed mounting of C template 390, two spacing grooves 381 have been seted up to the inboard symmetry of installation shell 380, the inboard top movable mounting of installation shell 380 has strong magnet 383, and the bilateral symmetry fixed mounting of strong magnet 383 has two stopper 382, the outside of stopper 382 and the inboard movable mounting of spacing groove 381, the bottom movable mounting of strong magnet 383 has reset spring 384, reset spring 384's bottom and the bottom fixed mounting of installation shell 380.

The working principle of the embodiment is as follows: after the plate is placed on the plate conveyer 1, the plate is moved to the front side along with the plate conveyer 1, cut when passing through the bottom of the plate cutting machine 2, then transported to the upper surface of the supporting plate 34 of the plate adjusting machine 3, when the plate is required to rotate or adjust the cutting angle, the adsorption disc 320 at the axis of the supporting plate 34 is tightly adsorbed at the bottom of the plate due to the suction effect of the vacuum pump 32, the position and the placing angle information of the plate are acquired through the image acquisition instrument 31, the path of cutting the plate again is determined along with the adjustment of the hydraulic adjusting rod 33, the plate conveyer 1 then transports the plate to the rear side to the bottom of the plate cutting machine 2, and the plate is cut again;

when needs are to overturn and cut the panel, when the panel is on backup pad 34, clamping parts 361 on both sides will carry out the centre gripping to the panel, electromagnetic generator 391 starts, and then produce powerful magnetic attraction between the strong magnet 383 of electro-magnet 392 and magnetic attraction 394, and then make strong magnet 383 jack-up upwards, cooperate electro-magnet 392 to carry panel centre gripping between the inside rubber pad 393 of C template 390, then carry panel forward side displacement through displacement motor 360, and rotatory upset behind the lifting motor 362 to panel lifting, place the panel at backup pad 34 top again at last, make the panel carry to panel cutting machine 2 bottom by panel conveyer 1 again and cut, realized panel automatic positioning, upset and adjustment cutting angle, avoided the manual handling panel to take time and energy and the problem of cutting precision decline.

Examples

According to the figures 1-6, the plate conveyer 1 comprises a base 10, a plurality of conveying rollers 13 are uniformly and movably arranged at the top of the base 10, bearings 14 are sleeved at the outer sides of two ends of each conveying roller 13, limiting ends 15 are fixedly arranged at two ends of each conveying roller 13, a fixed frame 11 is fixedly arranged at the top of one end of the base 10, a driving wheel 12 is fixedly arranged at the inner side of the fixed frame 11, two driving belts 16 are sleeved at the outer sides of two ends of the conveying rollers 13, a plurality of supporting belts 17 are uniformly and movably arranged between the two driving belts 16, the inner side of each supporting belt 17 is sleeved with the conveying roller 13, the conveying rollers 13 comprise a cross rod 130, a plurality of anti-skid sleeves 131 are uniformly and fixedly arranged at the outer sides of the cross rod 130, limiting sleeves 132 are symmetrically and fixedly arranged at two ends of the cross rod 130, the outer sides of the limiting sleeves 132 are movably connected with the inner sides of the driving belts 16, one end of stop collar 132 is fixed mounting has inserted bar 133, and the outside of inserted bar 133 and the inboard movable mounting of bearing 14, the inboard fixed mounting of bottom of base 10 has material receiving piece 18, the even fixed mounting of one end of material receiving piece 18 has a plurality of suction ends 19, and the inboard of every suction end 19 is all fixed mounting has filter 191, the one end of suction end 19 is linked together and is had aspirator 190, plank cutter 2 includes riser 20, the bottom of riser 20 and the top fixed mounting of base 10, and the top lower surface fixed mounting of riser 20 has slide rail 21, the inboard movable mounting of slide rail 21 has displacement piece 22, the bottom movable mounting of displacement piece 22 has lifter 23, the bottom fixed mounting of lifter 23 has saw 24, the front side bottom movable mounting of saw 24 has saw bit 25.

The working principle of the embodiment is as follows: when the plate is on the top of the conveying roller 13 of the plate conveyer 1, the plate is conveyed to the front side by the friction force between the anti-skid sleeve 131 and the supporting belt 17 of the rotating conveying roller 13 and the lower surface of the plate, after the plate is cut, cutting scraps fall into the receiving piece 18 at the bottom through the space between the conveying rollers 13, and the cutting scraps can be absorbed into the receiving piece 18 by the suction end 19, so that the scraps are prevented from splashing when the plate is cut, and the processing environment is prevented from being polluted; the driving wheel 12 can be adjusted in forward and reverse directions, the plate can be transported on the front side and the rear side of the upper surface of the driving wheel through the transport roller 13, further, the plate can be cut on the plate transporter 1 in a circulating and reciprocating mode, the saw 24 can adjust the cutting depth of the saw blade 25 on the plate under the control of the lifting rod 23, two operations of cutting and grooving the plate can be met, meanwhile, the saw 24 can be transversely adjusted at the bottom of the sliding rail 21 through the displacement member 22, and the saw blade 25 can cut an arc-shaped path on the plate during transportation of the plate.

Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.

Claims

1. The utility model provides an intelligent sawing machine, includes panel conveyer (1), panel cutting machine (2) and panel adjustment machine (3), its characterized in that: the top of one end of the plate conveyer (1) is movably connected with the bottom of the plate cutting machine (2), and the other end of the plate conveyer (1) is movably connected with one end of the plate adjusting machine (3);

the plate adjusting machine (3) comprises a bottom frame (30), two image acquisition instruments (31) are symmetrically and movably arranged at the top of one end of the bottom frame (30), displacement grooves (301) are respectively formed in the tops of two sides of the bottom frame (30), plate clamping pieces (36) are movably arranged at the inner sides of the tops of the displacement grooves (301), hydraulic adjusting rods (33) are fixedly arranged at the bottoms of the inner sides of the bottom frame (30), a vacuum pump (32) is fixedly arranged at one side of the bottoms of the hydraulic adjusting rods (33), a supporting plate (34) is movably arranged at the top of the hydraulic adjusting rods (33), a plurality of anti-slip pads (35) are uniformly and fixedly arranged at the outer sides of the tops of the supporting plate (34), grooves (340) are formed in the axle center of the supporting plate (34), adsorption discs (320) are movably arranged at the inner sides of the grooves (340), the bottom ends of the adsorption discs (320) are communicated with the tops of the vacuum pump (32), the plate clamping pieces (36) comprise displacement motors (360), the bottoms of the displacement motors (360) are movably arranged inside the displacement motors (360), the bottoms of the displacement motors (365) are fixedly arranged at the tops of the displacement motors (365), the vertical sliding grooves (364) are fixedly arranged at the tops (365), one side of the lifting motor (362) is fixedly provided with a clamping piece (361).

2. An intelligent sawing machine according to claim 1 wherein: the clamping piece (361) comprises a C-shaped plate (390), a plurality of electromagnets (392) are uniformly and fixedly arranged at the top of the C-shaped plate (390), and electromagnetic generators (391) are fixedly arranged at the top ends of the electromagnets (392).

3. An intelligent sawing machine according to claim 2 wherein: a plurality of magnetic attraction pieces (394) are uniformly and movably installed at the bottom end of the C-shaped plate (390), rubber pads (393) are movably installed between the magnetic attraction pieces (394) and the electromagnets (392), and one side of each rubber pad (393) is fixedly installed on the inner side of the C-shaped plate (390).

4. An intelligent sawing machine according to claim 3 wherein: the magnetic attraction piece (394) comprises a mounting shell (380), the top of the mounting shell (380) is fixedly mounted with the bottom of the C-shaped plate (390), two limit grooves (381) are symmetrically formed in the inner side of the mounting shell (380), a strong magnet (383) is movably mounted on the inner side top of the mounting shell (380), two limit blocks (382) are symmetrically and fixedly mounted on the two sides of the strong magnet (383), the outer side of the limit blocks (382) is movably mounted on the inner side of the limit grooves (381), a reset spring (384) is movably mounted at the bottom of the strong magnet (383), and the bottom of the reset spring (384) is fixedly mounted with the bottom of the mounting shell (380).

5. An intelligent sawing machine according to claim 1 wherein: the plate conveyer (1) comprises a base (10), a plurality of conveying rollers (13) are uniformly and movably mounted at the top of the base (10), bearings (14) are sleeved on the outer sides of two ends of each conveying roller (13), limiting ends (15) are fixedly mounted at two ends of each conveying roller (13), a fixing frame (11) is fixedly mounted at one end top of the base (10), and a driving wheel (12) is fixedly mounted on the inner side of the fixing frame (11).

6. An intelligent sawing machine according to claim 5 wherein: two driving belts (16) are sleeved on the outer sides of two ends of the conveying roller (13), a plurality of supporting belts (17) are uniformly and movably installed between the driving belts (16), and the inner side of each supporting belt (17) is sleeved with the conveying roller (13).

7. An intelligent sawing machine according to claim 5 wherein: the conveying roller (13) comprises a cross rod (130), a plurality of anti-skid sleeves (131) are uniformly and fixedly arranged on the outer side of the cross rod (130), limit sleeves (132) are symmetrically and fixedly arranged at the two ends of the cross rod (130), the outer side of each limit sleeve (132) is movably connected with the inner side of a driving belt (16), a plug rod (133) is fixedly arranged at one end of each limit sleeve (132), and the outer side of each plug rod (133) is movably arranged on the inner side of each bearing (14).

8. An intelligent sawing machine according to claim 5 wherein: the novel suction device is characterized in that a receiving piece (18) is fixedly arranged on the inner side of the bottom of the base (10), a plurality of suction ends (19) are uniformly and fixedly arranged at one end of the receiving piece (18), a filter piece (191) is fixedly arranged on the inner side of each suction end (19), and a suction machine (190) is communicated with one end of each suction end (19).

9. An intelligent sawing machine according to claim 5 wherein: the plate cutting machine (2) comprises a stand (20), the bottom of the stand (20) is fixedly mounted with the top of the base (10), a sliding rail (21) is fixedly mounted on the lower surface of the top of the stand (20), a displacement member (22) is movably mounted on the inner side of the sliding rail (21), a lifting rod (23) is movably mounted on the bottom of the displacement member (22), a sawing machine (24) is fixedly mounted on the bottom of the lifting rod (23), and a saw blade (25) is movably mounted on the bottom of the front side of the sawing machine (24).