Dust remover steel structure frame cutting control equipment and method

Abstract

The invention relates to the technical field of cutting machining, in particular to dust remover steel structure frame cutting control equipment and method.The dust remover steel structure frame cutting control equipment comprises a rack, a power device, a guide mechanism and a saw blade; the saw blade is rotationally arranged on the power device; the guide mechanism comprises a supporting arm, a back pressure unit and at least two guide bearings, and the supporting arm is used for guiding the saw blade to be folded to a vertical state; the at least two guide bearings are rotationally mounted on the supporting arm around the vertical axis, are located on the two sides of the lower side edge of the saw blade correspondingly and are used for guiding the saw blade to pass; the back pressure unit is arranged to abut against the saw blade, the back pressure belt is in surface contact with the saw blade, and compared with the mode that a bearing or a roller is in contact with the saw blade in the prior art, the contact area is larger, and the abrasion probability is lower; and when the back pressure belt which is obliquely arranged rotates under the friction contact with the saw blade, the contact position with the saw blade can be continuously changed, so that the abrasion of the back pressure belt is further reduced.

Description

Technical Field

[0001] This invention relates to the field of cutting and processing technology, specifically to a cutting control device and method for a dust collector steel structure frame. Background Technology

[0002] As a core piece of equipment in industrial environmental protection systems, dust collectors typically have steel frame structures made of various types of steel (such as H-beams, I-beams, and square tubes) welded or spliced ​​together. During manufacturing, high-precision and high-efficiency cutting of these steel sections is the primary and crucial step. Band saws, as efficient and energy-saving cold-cutting equipment, have become one of the mainstream devices for cutting steel frame structures due to their advantages such as narrow kerfs, high precision, and low material waste.

[0003] In traditional band saws, the core cutting component—the ring-shaped saw blade—is typically driven and tensioned by two horizontally or nearly horizontally positioned drive wheels, forming a large annular cutting band. The straight section at the bottom of the saw blade is the effective working section, which needs to pass through the workpiece during the cutting task. To ensure the perpendicularity and straightness of the cut surface and to prevent the saw blade from swaying or twisting under the cutting force, a guide structure must be installed near the working section of the saw blade. Common guide mechanisms in existing technologies often use paired, fixedly installed carbide blocks or bearings, which are tightly attached to both sides of the working section of the saw blade to clamp and guide it.

[0004] However, this conventional guiding method reveals several inherent defects and bottlenecks in long-term, heavy-load steel structure cutting operations: First, the working section of the saw blade often needs to be mechanically forced to fold, changing from a horizontal transmission state to a vertical cutting state. This plastic deformation causes the saw blade to store elastic stress inside, attempting to restore its original shape. During cutting, this torque causes the saw blade to continuously and with considerable pressure press against a fixed side of the guide bearing or guide block. This concentrated, unidirectional, continuous pressure leads to a sharp acceleration of wear on one side of the guide element, not only shortening the bearing life and increasing maintenance costs and downtime due to frequent replacements, but also reducing the guiding accuracy of the saw blade as the guide clearance increases due to wear, directly affecting the cross-sectional quality of the cut workpiece and potentially producing beveled surfaces or kerf marks. Second, to provide sufficient downward cutting pressure and suppress saw blade vibration under cutting load, a back pressure device is usually installed above the saw blade. Existing technologies mostly use fixed-axis rollers or bearings that directly press against the back of the saw blade. This method has two drawbacks: First, point or line contact leads to stress concentration, which can easily create periodic indentations at specific locations on the back of the saw blade teeth, potentially inducing fatigue cracks in the saw blade over long-term operation. These problems can all reduce the lifespan of the guide structure and affect cutting efficiency. Summary of the Invention

[0005] This invention provides a cutting control device and method for a dust collector steel structure frame to solve the above-mentioned technical problems.

[0006] The present invention provides a cutting control device and method for a steel structure frame of a dust collector, which adopts the following technical solution:

[0007] A cutting control device for a steel frame of a dust collector includes a frame, a power unit, a guiding mechanism, and a saw blade. The power unit is movable up and down relative to the frame and includes two rotatably mounted transmission wheels. The two transmission wheels are parallel and inclined, and the saw blade is wound around the two transmission wheels and rotates synchronously with them. At least two guiding mechanisms are provided, distributed sequentially along the lower side of the saw blade. Each guiding mechanism includes a support arm, a back pressure unit, and at least two guide bearings. The support arm is movable up and down relative to the frame and is used to guide the saw blade to fold into a vertical position. At least two guide bearings are rotatably mounted around a vertical axis. The support arm has two back pressure units located on either side of the lower side of the saw blade, which are used to guide the saw blade through. The back pressure unit is located above the lower side of the saw blade and includes a mounting frame, at least two back pressure wheels rotatably mounted on the mounting frame, and a back pressure belt sleeved on the back pressure wheels. The mounting frame is mounted on the support arm, and a support block for supporting the back pressure belt is provided between two adjacent back pressure wheels so that the back pressure belt can maintain contact with the saw blade. The distribution direction of the at least two back pressure wheels is inclined to the extension direction of the lower side of the saw blade, and the mounting frame can rotate relative to the support arm so that the relative angle between the distribution direction of the at least two back pressure wheels and the saw blade is adjustable.

[0008] Optionally, the support arm includes a fixed frame, a guide rod, and a guide head. The fixed frame can move up and down relative to the frame, and the guide rod is vertical and located inside the fixed frame. The guide head slides up and down with the fixed frame and is located on the lower side of the fixed frame, and is connected to the fixed frame by an elastic element. The mounting frame is rotatably mounted on the guide head and moves up and down synchronously with the guide head. The mounting frame is helically engaged with the guide rod so that it rotates when the fixed frame and the guide head approach each other, and the rotation amplitude is positively correlated with the relative movement distance of the fixed frame and the guide head.

[0009] Optionally, the guide mechanism also includes a pair of wire brushes, which are installed on the support arm and located on both sides of the saw blade. The pair of wire brushes rub against the saw blade and rotate in opposite directions to clean the saw blade, and exert a downward force on the saw blade when the wire brushes rotate.

[0010] Optionally, the fixed frame is provided with a pair of distributed pressure rods, and the guide head is equipped with a mounting block. Each wire brush is hinged to the mounting block through a swing arm. When the fixed frame and the guide head approach each other, the pair of distributed pressure rods push the swing arms of the paired wire brushes closer to each other, thereby increasing the friction between the wire brush and the saw blade.

[0011] Optionally, the support block has curved surfaces on both sides near the back pressure wheel, and the curved surfaces make smooth contact with the back pressure wheel.

[0012] Optionally, the guide head has a channel for the saw blade to pass through; the guide mechanism also includes a fixed block and a top block, the fixed block and the guide head are respectively located on the two side walls of the channel, and the fixed block is fixed to the guide head, and the top block can move closer to or further away from the fixed block to adjust the distance between the device and the fixed block, thereby adapting to saw blades of different thicknesses.

[0013] Optionally, the guide bearings are arranged in pairs, with the two guide bearings on opposite sides of the saw blade at different heights, to provide the saw blade with a torque to twist to the vertical direction.

[0014] Optionally, the guide mechanisms are arranged in pairs, and a cutting section for the saw blade to cut the workpiece is defined between the two guide mechanisms in the pair, with the wire brush located on the side of the support arm near the cutting section.

[0015] Optionally, a crossbeam is provided on the frame, which can move up and down relative to the frame, and the mounting brackets of the support arms of at least two guide mechanisms are mounted on the crossbeam.

[0016] A method for controlling the cutting of a dust collector steel structure frame, utilizing the aforementioned dust collector steel structure frame cutting control equipment, includes the following steps:

[0017] S10, the lower side of the saw blade passes between at least two guide bearings of the guide mechanism, and the guide bearings make the section of the saw blade located between the at least two guide mechanisms vertical;

[0018] S20, Adjust the relative position of the guide mechanism and the saw blade so that the back pressure band of the back pressure unit can keep in contact with the saw blade, and the side extension direction of the back pressure band is set at an angle relative to the saw blade.

[0019] S30, start the drive wheel to rotate, drive the saw blade to rotate, and at the same time the power unit and guide mechanism move downward to feed the workpiece for cutting.

[0020] The beneficial effects of this invention are as follows: The dust collector steel structure frame cutting control device of this invention sets up a back pressure unit that abuts against the saw blade. The back pressure belt and the saw blade have surface contact, which, compared with the prior art of using bearings or rollers to contact the saw blade, results in a larger contact area and a lower probability of wear. Furthermore, the inclined back pressure belt will continuously change its contact position with the saw blade as it rotates under frictional contact, further reducing the wear of the back pressure belt. At the same time, the eccentric torque provided by the inclined back pressure belt and back pressure wheel to the saw blade during rotation can offset part of the top pressure of the saw blade on the guide bearing, extending the overall service life of the guide mechanism.

[0021] Furthermore, the mounting bracket and guide rod are screwed together, and rotate when the fixed bracket and guide head approach each other. The rotation amplitude is positively correlated with the relative movement distance of the fixed bracket and guide head. This allows the guide mechanism to approach and contact the saw blade, or the saw blade to cut the workpiece and be subjected to the reaction force of the workpiece. The mounting bracket rotates under the screw engagement with the guide rod, which further increases the tilt angle of the back pressure belt and back pressure wheel relative to the saw blade, thereby increasing the contact area between the back pressure belt and the saw blade and reducing the wear of the back pressure belt.

[0022] Furthermore, the paired wire brushes rotate synchronously in opposite directions, with the side closest to the saw blade rotating downwards. This removes debris from the saw blade while simultaneously causing the saw blade to move downwards, further reducing the top pressure of the saw blade on the back pressure unit. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the dust collector steel structure frame cutting control device of the present invention;

[0025] Figure 2 This is a schematic diagram of the installation of multiple guiding mechanisms in an embodiment of the dust collector steel structure frame cutting control equipment of the present invention;

[0026] Figure 3 This is a schematic diagram of the guiding mechanism in an embodiment of the dust collector steel structure frame cutting control equipment of the present invention;

[0027] Figure 4 This is a schematic diagram showing the disassembled guide mechanism in an embodiment of the dust collector steel structure frame cutting control equipment of the present invention;

[0028] Figure 5 This is a front view of the guide mechanism in an embodiment of the dust collector steel structure frame cutting control equipment of the present invention;

[0029] Figure 6 This is a side view of the guide mechanism in an embodiment of the dust collector steel structure frame cutting control device of the present invention;

[0030] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0031] Figure 8This is a side view of the guide mechanism from another direction in an embodiment of the dust collector steel structure frame cutting control device of the present invention;

[0032] Figure 9 for Figure 8 Schematic diagram of cross section along the AA direction;

[0033] Figure 10 for Figure 8 Schematic diagram of cross section along the BB direction.

[0034] In the diagram: 100, frame; 110, crossbeam; 200, power unit; 210, transmission wheel; 220, lifting frame; 300, guide mechanism; 310, support arm; 311, fixed frame; 312, guide rod; 313, guide head; 314, elastic element; 315, pressure bar; 316, mounting block; 320, back pressure unit; 321, mounting frame; 322, back pressure wheel; 323, back pressure belt; 324, support block; 330, guide bearing; 340, wire brush; 341, swing arm; 400, saw blade. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] An embodiment of the dust collector steel structure frame cutting control device of the present invention, such as... Figures 1 to 10 As shown, it includes a frame 100, a power unit 200, a guide mechanism 300, and a saw blade 400.

[0037] The power unit 200 is movable up and down relative to the frame 100 and includes two rotatably mounted drive wheels 210. The two drive wheels 210 are parallel and inclined. The saw blade 400 is wound around the two drive wheels 210 and rotates synchronously with the drive wheels 210. Specifically, the power unit 200 also includes a lifting frame 220, which is slidably mounted on the frame 100 and connected to the frame 100 via a hydraulic mechanism (not shown in the figure). Both drive wheels 210 are rotatably mounted on the lifting frame 220. The hydraulic mechanism drives the lifting frame 220 to move up and down, thereby driving the drive wheels 210 and the saw blade 400 to move up and down synchronously.

[0038] At least two guide mechanisms 300 are provided, which are distributed sequentially along the lower side of the saw blade 400. Each guide mechanism 300 includes a support arm 310, a back pressure unit 320, and at least two guide bearings 330. The support arm 310 can move up and down relative to the frame 100 and is used to guide the saw blade 400 to fold into a vertical position. The at least two guide bearings 330 are rotatably mounted on the support arm 310 about a vertical axis and are located on both sides of the lower side of the saw blade 400 to guide the saw blade 400 through. The back pressure unit 320 is located above the lower side of the saw blade 400 and includes a mounting frame 321, at least two back pressure rollers 322 rotatably mounted on the mounting frame 321, and a back pressure belt 323 sleeved around the back pressure rollers 322. The mounting frame 321 is mounted on the support arm 310. The at least two back pressure rollers 322 are parallel to each other and spaced apart. A support block 324 is provided between two adjacent back pressure rollers 322 to support the back pressure belt 323, so that the back pressure belt 323 can maintain contact with the saw blade 400. The distribution direction of the at least two back pressure rollers 322 is inclined to the extension direction of the lower side of the saw blade 400, and the mounting frame 321 can rotate relative to the support arm 310, so that the relative angle between the distribution direction of the at least two back pressure rollers 322 and the saw blade 400 is adjustable. The back pressure belt 323 can be made of a wear-resistant metal material.

[0039] In use, the lower edge of the saw blade 400 passes sequentially through the support arms 310 of at least two guide mechanisms 300. The support arms 310 fold the lower edge of the saw blade 400 to a vertical position for cutting the workpiece. At least two guide bearings 330 are located on both sides of the lower edge of the saw blade 400, providing guidance for the saw blade 400 as it rotates with the drive wheel 210. Since the lower edge of the saw blade 400 is folded and deformed to a vertical position, it exerts a first deflection torque on the guide bearing 330 about its lower edge extension axis. This first deflection torque is the torque required for the saw blade 400 to return to its original deformation state. The back pressure roller 322 is located on the upper side of the lower side of the saw blade 400. When the saw blade 400 cuts the workpiece, it provides downward pressure to the saw blade 400. When the saw blade 400 rotates, it drives the back pressure belt 323 to rotate around the back pressure roller 322. Since the distribution direction of at least two back pressure rollers 322 is inclined to the extension direction of the lower side of the saw blade 400, the back pressure belt 323 will continuously change the contact position with the saw blade 400 when rotating. Compared with the way that the back pressure roller 322 and the saw blade 400 are in constant contact position in the prior art, it is not easy to produce indentations at specific positions. Furthermore, the inclined back pressure roller 322 and back pressure belt 323 provide a second deflection torque to the saw blade 400 when they are rotated by the saw blade 400. The second deflection torque causes the lower side of the saw blade 400 to tend to deflect around its extension axis. By matching the inclination direction of the back pressure roller 322 and back pressure belt 323 with the deformation direction of the saw blade 400, the second deflection torque can offset part of the first deflection force, thereby reducing the top pressure of the saw blade 400 on the guide bearing 330 and thus reducing the wear on the guide bearing 330.

[0040] By setting the back pressure unit 320 to abut against the saw blade 400, the back pressure band 323 and the saw blade 400 have surface contact. Compared with the existing technology that uses bearings or rollers to contact the saw blade 400, the contact area is larger and the probability of wear is lower. Moreover, the inclined back pressure band 323 will continuously change its contact position with the saw blade 400 when rotating under frictional contact with the saw blade 400, further reducing the wear of the back pressure band 323. At the same time, the eccentric torque provided by the inclined back pressure band 323 and the back pressure roller 322 to the saw blade 400 when rotating can offset part of the top pressure of the saw blade 400 on the guide bearing 330, extending the overall service life of the guide mechanism 300.

[0041] In this embodiment, the support arm 310 includes a fixed frame 311, a guide rod 312, and a guide head 313. The fixed frame 311 is movable up and down relative to the frame 100, and the guide rod 312 is vertical and located inside the fixed frame 311. The guide head 313 is slidably engaged with the fixed frame 311 and is located below the fixed frame 311, and is connected to the fixed frame 311 by an elastic element 314; wherein the elastic element 314 is a spring and is sleeved on the outside of the guide rod 312. The mounting frame 321 is rotatably mounted on the guide head 313 and moves up and down synchronously with the guide head 313, and the mounting frame 321 is helically engaged with the guide rod 312 so as to rotate when the fixed frame 311 and the guide head 313 approach each other, and the rotation amplitude is positively correlated with the relative movement distance of the fixed frame 311 and the guide head 313.

[0042] When the guide mechanism 300 approaches and abuts against the saw blade 400, or when the saw blade 400 cuts the workpiece and receives a reaction force from the workpiece, the mounting bracket 321 installed on the guide head 313 pushes the guide head 313 upward relative to the fixed bracket 311. The greater the hardness of the workpiece, the greater the reaction force on the back pressure unit 320, and the greater the upward distance the guide head 313 moves relative to the fixed bracket 311. The mounting bracket 321 rotates under the helical engagement with the guide rod 312, further increasing the inclination angle of the back pressure belt 323 and the back pressure wheel 322 relative to the saw blade 400, thereby increasing the contact area between the back pressure belt 323 and the saw blade 400 and reducing the wear of the back pressure belt 323. When the workpiece hardness is low, the reaction force on the back pressure unit 320 is small, and the inclination angle of the back pressure wheel 322 and the back pressure belt 323 relative to the saw blade 400 does not need to be large, which can reduce the frictional resistance of the back pressure belt 323 on the rotation of the saw blade 400.

[0043] In this embodiment, the guide mechanism 300 further includes a pair of wire brushes 340. The pair of wire brushes 340 are mounted on the support arm 310 and located on both sides of the saw blade 400. The pair of wire brushes 340 rub against the saw blade 400 and rotate in opposite directions to clean the saw blade 400. When the wire brushes 340 rotate, they exert a downward force on the saw blade 400. The pair of wire brushes 340 rotate synchronously in opposite directions, with the side closer to the saw blade 400 rotating downwards. This removes debris from the saw blade 400 and, by increasing the downward tendency of the saw blade 400, further reduces the top pressure of the saw blade 400 on the back pressure unit 320.

[0044] In this embodiment, the fixed frame 311 is provided with paired pressure rods 315, and the guide head 313 is equipped with a mounting block 316. Each wire brush 340 is hinged to the mounting block 316 via a swing arm 341. When the fixed frame 311 and the guide head 313 approach each other, the paired pressure rods 315 push the swing arms 341 of the paired wire brushes 340 closer together, thereby increasing the friction between the wire brushes 340 and the saw blade 400. When the fixed frame 311 and the guide head 313 approach each other further, it indicates that the harder the workpiece being cut by the saw blade 400, the greater the reaction force on the back pressure unit 320. By bringing the wire brushes 340 closer to the saw blade 400, the downward force on the saw blade 400 is increased, thereby reducing the reaction force on the back pressure unit 320. The wire brushes 340 can be driven to rotate by a motor (not shown in the figure) mounted on the swing arm 341.

[0045] In this embodiment, the two sides of the support block 324 near the back pressure roller 322 are arc surfaces, and the arc surfaces are in smooth contact with the back pressure roller 322. The support block 324 is connected to the back pressure roller 322, and thus the back pressure belt 323 effectively supports the saw blade 400.

[0046] In this embodiment, the guide head 313 has a channel through which the saw blade 400 passes. The guide mechanism 300 also includes a fixed block and a top block. The fixed block and the guide head 313 are located on two side walls of the channel, and the fixed block is fixed to the guide head 313. The top block can move closer to or further away from the fixed block to adjust the distance between the guide and the fixed block, thereby adapting to saw blades 400 of different thicknesses. Specifically, a knob that is threadedly engaged with the top block is rotatably mounted on the guide head 313. By rotating the knob, the top block can be moved closer to or further away from the fixed block.

[0047] In this embodiment, the guide bearings 330 are arranged in pairs, with the two guide bearings 330 located on opposite sides of the saw blade 400 at different heights, to provide the saw blade 400 with a torque to twist to the vertical direction. Of the two guide bearings 330 arranged in pairs, the guide bearing 330 located on the same side as the fixing block is fixed in position, while the guide bearing 330 located on the same side as the top block is adjustable in position to accommodate saw blades 400 of different thicknesses.

[0048] In this embodiment, the guide mechanisms 300 are arranged in pairs, and the two guide mechanisms 300 define a cutting section for the saw blade 400 to cut the workpiece. The wire brush 340 is located on the side of the support arm 310 near the cutting section, so that no matter whether the saw blade 400 rotates forward or backward, the wire brush 340 of at least one guide mechanism 300 can clean the saw blade 400.

[0049] In this embodiment, a crossbeam 110 is provided on the frame 100. The crossbeam 110 can move up and down relative to the frame 100. The fixing frames 311 of the support arms 310 of at least two guide mechanisms 300 are all mounted on the crossbeam 110. The up and down movement of the crossbeam 110 can be driven by another hydraulic mechanism.

[0050] Before using the dust collector steel structure frame cutting control device of the present invention, the saw blade 400 and the guide mechanism 300 are first installed: the crossbeam 110 is moved downward, driving the guide mechanism 300 to move downward, and the lower side of the saw blade 400 is folded to a vertical state, so that the lower side of the saw blade 400 is stuck between the fixed block and the top block. The distance between the top block and the fixed block is adjusted to limit the saw blade 400 without affecting the rotation of the saw blade 400. Pairs of guide bearings 330 abut against the two sides of the saw blade 400 respectively, and the back pressure band 323 of the back pressure unit 320 abuts against the saw blade 400 and is inclined. Pairs of wire brushes 340 abut against the two sides of the saw blade 400.

[0051] When cutting the workpiece, the drive wheel 210 rotates, driving the saw blade 400 to rotate synchronously. At the same time, the power unit 200 and the guide mechanism 300 move downwards synchronously for feeding. The lower side of the saw blade 400 cuts the workpiece, and the wire brush 340 rotates to clean the debris on the saw blade 400. If the workpiece is hard, the reaction force on the saw blade 400 during downward feeding is also greater, and the action of the saw blade 400 on the back pressure unit 320 is also greater. This results in a larger distance between the guide head 313 and the fixed frame 311, and the elastic element 314 is compressed more. The mounting bracket 321 of the back pressure unit 320 rotates in a spiral engagement with the fixed frame 311, increasing the tilt angle between the back pressure band 323 and the saw blade 400. This further increases the contact area between the back pressure band 323 and the saw blade 400 during rotation, adapting to workpieces with higher hardness and reducing wear on the back pressure band 323.

[0052] A method for controlling the cutting of a dust collector steel structure frame, utilizing the aforementioned dust collector steel structure frame cutting control equipment, includes the following steps:

[0053] S10, the lower side of the saw blade 400 passes between at least two guide bearings 330 of the guide mechanism 300, and the guide bearings 330 make the section of the saw blade 400 between the at least two guide mechanisms 300 vertical.

[0054] S20, adjust the relative position of the guide mechanism 300 and the saw blade 400 so that the back pressure band 323 of the back pressure unit 320 can keep in contact with the saw blade 400, and the side extension direction of the back pressure band 323 is inclined relative to the saw blade 400.

[0055] S30, start the transmission wheel 210 to rotate, drive the saw blade 400 to rotate, and at the same time the power unit 200 and the guide mechanism 300 move downward synchronously to feed the workpiece for cutting.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dust extractor steel structure frame cutting control apparatus, characterized by, The sawing machine comprises a frame, a power device, a guide mechanism and a saw blade. The power device is movable up and down relative to the frame and comprises two transmission wheels arranged in rotation, which are parallel and inclined. The guide mechanism comprises at least two support arms, back pressure units and at least two guide bearings.

2. The precipitator steel structural frame cutting control apparatus according to claim 1, characterized by, The support arms are movable up and down relative to the frame and are used to guide the saw blade to be folded to a vertical state.

3. The precipitator steel structural frame cutting control apparatus according to claim 2, wherein, The at least two guide bearings are rotatably arranged on the support arms around vertical axes and are respectively located on both sides of the lower side of the saw blade to guide the saw blade.

4. The precipitator steel structural frame cutting control apparatus according to claim 3, wherein, The back pressure units are located above the lower side of the saw blade and comprise mounting frames, at least two back pressure wheels rotatably arranged on the mounting frames and back pressure belts sleeved on the back pressure wheels.

5. The precipitator steel structural frame cutting control apparatus of claim 1, wherein, The mounting frames are arranged on the support arms.

6. The precipitator steel structural frame cutting control apparatus of claim 1, wherein, The adjacent two back pressure wheels are provided with support blocks for supporting the back pressure belts, so that the back pressure belts can abut against the saw blade.

7. The precipitator steel structural frame cutting control apparatus of claim 1, wherein, The mounting frames are rotatable relative to the support arms, so that the relative angle between the distribution direction of the at least two back pressure wheels and the saw blade can be adjusted.

8. The precipitator steel structural frame cutting control apparatus according to claim 3, wherein, The support arms comprise fixed frames, guide rods and guide heads.

9. The dust extractor steel structural frame cutting control apparatus according to claim 1, wherein, The fixed frames are movable up and down relative to the frame.

10. A method of cutting control of a dust collector steel structure frame using the dust collector steel structure frame cutting control apparatus according to any one of claims 1 to 9, characterized by, The guide rods are vertical and located in the fixed frames. The guide heads are in sliding fit with the fixed frames and are located on the lower side of the fixed frames. The mounting frames are rotatably arranged on the guide heads and are movable up and down synchronously with the guide heads. The mounting frames are in screw fit with the guide rods, so that the mounting frames are rotated and the rotation amplitude is positively correlated with the relative movement distance of the fixed frame and the guide head when the fixed frame and the guide head are close to each other. The guide mechanism further comprises a pair of steel wire brushes. The steel wire brushes are arranged on the support arms and are respectively located on both sides of the saw blade. The steel wire brushes are in frictional contact with the saw blade and are rotated in opposite directions to clean the saw blade. The fixed frames are provided with a pair of distribution pressure rods. The guide heads are provided with mounting blocks. Each steel wire brush is hinged to the mounting blocks through a swing arm. When the fixed frame and the guide head are close to each other, the swing arms of the pair of steel wire brushes are pushed close to each other by the pair of distribution pressure rods, so as to increase the friction force between the steel wire brushes and the saw blade. The two sides close to the back pressure wheels of the support blocks are arc surfaces and are in smooth contact with the back pressure wheels. The guide head is provided with a channel for the saw blade to pass through. The guide mechanism further comprises a fixed block and a top block. The fixed block and the guide head are respectively located on two side walls of the channel and are fixed. The top block can be close to or away from the fixed block to adjust the distance between the guide and the fixed block, so as to adapt to saw blades of different thicknesses. The guide bearings are arranged in pairs and are respectively located on both sides of the saw blade. The guide mechanisms are arranged in pairs. The saw blade is used to cut workpieces. The fixed frames of the support arms of the at least two guide mechanisms are arranged on the cross beam. The sawing machine comprises the following steps: S10, passing the lower side of the saw blade between the at least two guide bearings of the guide mechanism, and the guide bearings keep the section of the saw blade between the at least two guide mechanisms in a vertical state; S20, adjusting the relative position of the guide mechanism and the saw blade, so that the back pressure belt of the back pressure unit can keep abutting against the saw blade, and the side edge of the back pressure belt is arranged in an inclined manner relative to the extension direction of the saw blade; S30, starting the rotation of the transmission wheel to drive the saw blade to rotate, and the power device and the guide mechanism are synchronously moved downward to feed the workpiece.

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