Profile tail sawing mechanism, saw-milling machine comprising it and sawing method using it

Abstract

The application discloses a profile tail sawing mechanism, which comprises a clamping mechanism for conveniently sawing the tail, and the clamping mechanism is arranged at a discharging track. The structure of the clamping mechanism at the discharging track is the same as that of the clamping mechanism at a feeding track. The application further discloses a sawing and milling machine comprising the profile tail sawing mechanism. The sawing and milling machine comprises a rack, a gantry frame arranged on the rack, a power head arranged on the gantry frame, a saw blade rotatably arranged on the power head, and the feeding track and the discharging track arranged on the two sides of the gantry frame. An optical sensor is arranged on the rack and close to the power head. The application further discloses a sawing method. The profile with different lengths is arranged side by side on the feeding track and is conveyed together. After being sawed and milled by the steel plate sawing and milling machine for one time, the profile is taken as a reference. Then, the profile is sawed and milled for several times according to a set program, and is conveyed to a next process for treatment. When the profile is sawed and milled for the last time, the tail sawing process is performed. The application is convenient for sawing and milling the tail and discharging the waste.

Description

TECHNICAL FIELD

[0001] The present application relates to a profile tail sawing mechanism, a sawing and milling machine comprising the same and a sawing method using the same. BACKGROUND

[0002] When the applicant saws and mills the forklift mast (its cross section is similar to H-shaped, close to the shape of H steel) in the production site, it is found that due to the clamping mechanism of the profile having a certain width, plus the need to avoid the active range of the saw blade and the active range of the power head and other active mechanisms between the feeding roller way and the discharging roller way, there is a larger gap between the feeding roller way and the discharging roller way, so when sawing the profile mother material to the last cut (i.e. sawing the tail material), according to the degree setting, the last cut sawing position may be located at the clamping mechanism (i.e. according to the required profile sub-material size, such as the minimum size of the forklift mast is 800mm, i.e. the minimum sub-material is 800mm; and the gap between the feeding roller way and the discharging roller way in the production site is 675mm, and the clamping mechanism at the feeding roller way itself has a certain width, so the last cut sawing position is located at the clamping mechanism), i.e. the problem of tail material sawing cannot be solved (i.e. the limit position of the clamping mechanism cannot meet the sawing length size requirement of the final tail material), and the existing technology has no good solution, generally using manual method (using small size clamping mechanism manually) for tail material sawing, i.e. the last cut of the profile mother material.

[0003] In addition, different specifications of forklift masts have different lengths but the same shape, and considering the processing efficiency, the applicant uses several forklift masts side by side, even if the mother materials of different specifications and sizes are uniformly cut for one cut as a reference, so the tail material length (and the length of the waste material after tail material sawing) may be different, and the waste material after sawing the last long tail material may be far away from the chip removal mechanism below the saw blade due to the conveying effect of the feeding roller way and the discharging roller way, which is easy to cause the problem that the tail material waste cannot be smoothly discharged (but is conveyed out together with the finished product). SUMMARY

[0004] The purpose of the present application is to overcome the defects in the prior art and provide a profile tail sawing mechanism, which adds a clamping mechanism for sawing tail material, and solves the problem of tail material sawing by providing two clamping mechanisms before and after the saw blade.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the present application is to design a profile tail sawing mechanism, which comprises a clamping mechanism for conveniently sawing the tail, the clamping mechanism is arranged at the discharge chute, and the structure of the clamping mechanism at the discharge chute is the same as that of the clamping mechanism at the feeding chute. The clamping mechanism for sawing the tail is additionally arranged, and the problem of tail sawing is solved by arranging the two clamping mechanisms before and after the saw blade.

[0006] Further technical scheme is that the clamping mechanism comprises a base slidingly arranged on a line rail, the base is connected with a driving mechanism fixedly connected to a saw-milling machine frame through a transmission mechanism; and a clamping piece for clamping the profile is arranged on the base.

[0007] Further technical scheme is that the length direction of the base is perpendicular to the material conveying direction; and the clamping piece comprises two oil cylinders fixedly arranged at two opposite ends of the length direction of the base, one of the two oil cylinders is a reference oil cylinder, and the other is a clamping oil cylinder. Because the edge (side) of the profile has burrs or curved arc protruding parts, etc., if the reference oil cylinder is not arranged and the existing clamping mechanism is used, that is, a fixed abutment is arranged on one side and a clamping oil cylinder is arranged on the other side, even if the profile side abuts against the fixed abutment after the feeding chute is initially installed, the profile side is abutted against the fixed abutment due to the extension of the piston rod of the clamping oil cylinder, and when the last cut is sawed, the clamping mechanism after the saw blade needs to move horizontally towards the saw blade to realize the action of changing the clamping material of the clamping mechanism before the saw blade to the clamping material of the clamping mechanism after the saw blade, therefore, if the fixed abutment is arranged on the clamping mechanism, the side of the fixed abutment facing the clamping oil cylinder will collide with the burrs of the profile side when the clamping mechanism after the saw blade moves horizontally towards the saw blade, therefore, by arranging the two oil cylinders, that is, one reference oil cylinder and one clamping oil cylinder, on the base of the clamping mechanism, the collision or knock of the clamping mechanism after the saw blade with the burrs (or burrs or curved arc protruding parts, etc.) of the profile side when the clamping mechanism after the saw blade moves towards the saw blade can be avoided.

[0008] Further technical scheme is that the driving mechanism is a speed reducer motor, and the transmission mechanism is a screw nut mechanism; the output shaft of the speed reducer motor is fixedly connected with a screw rod of the screw nut mechanism, the base is fixedly connected with a nut of the screw nut mechanism, and the nut is slidingly arranged on the frame of the saw-milling machine; and the line rail is arranged in a pair and arranged outside the discharge chute and the feeding chute.

[0009] A further technical solution is that a tail material waste turning mechanism and a material support frame are sequentially arranged between the feeding roller and the discharging roller along the material conveying direction; at least two rotatable rollers are arranged on the material support frame, and the upper plane tangent to the rollers is flush with the upper surface of the rollers on the feeding roller; the upper surface of the rollers on the feeding roller is flush with the upper surface of the rollers on the discharging roller; the tail material waste turning mechanism includes a turning cylinder fixedly mounted on the sawing and milling machine frame, the cylinder body of the turning cylinder is fixedly connected to the frame through a folded connecting plate, the exposed end of the piston rod of the turning cylinder is hinged to the drive block, and the upper end of the drive block is fixedly connected to an extension plate that slides down the turning plate. The extension plate is smaller than the flipping plate. A pair of oppositely arranged grooves for sliding the extension plate are fixedly provided on the lower surface of the flipping plate. The lower end of the drive block is hinged to the folded connecting plate, which is fixedly connected to the frame. The exposed end of the piston rod of the telescopic cylinder that drives the extension plate is fixedly connected to the extension plate through the connecting block. The cylinder body of the telescopic cylinder is fixedly connected to the lower surface of the flipping plate. A rectangular opening is provided on the extension plate to avoid interfering with the movement of the extension plate. There are two flipping cylinders that work synchronously, and the telescopic cylinder is located between the two flipping cylinders. The flipping direction of the flipping plate is to discharge the tail waste material to the side edge of the discharge roller. The tail material turning mechanism and the material support frame fill the gap between the feeding roller and the discharging roller, avoiding the situation in the existing technology where a large gap between the feeding roller and the discharging roller requires the clamping position of the tail material to be closer to the center of the tail material (otherwise, if the clamping position is too close to the edge of the tail material, and there is a large gap between the feeding roller and the discharging roller, the safety of the tail material after clamping and conveying cannot be guaranteed, and the suspended end of the tail material may not be conveyed to the upper surface of the discharging roller, or even the tail material may rotate at the clamping point). The tail material turning mechanism can prevent the tail material from hitting the linear rail or hard rail near the milling machine frame during discharge.

[0010] The present invention also provides a sawing and milling machine, comprising the aforementioned profile tail material sawing mechanism. The sawing and milling machine includes a frame, a gantry frame mounted on the frame, a power head mounted on the gantry frame, a saw blade rotatably mounted on the power head, and the aforementioned feeding and discharging roller tracks on both sides of the gantry frame. A photoelectric sensor is mounted on the frame near the power head. This sawing and milling machine also includes a chip removal mechanism below the power head, which, in conjunction with a tail material waste tilting mechanism, discharges the waste material.

[0011] The present invention also provides a sawing method, which uses the sawing and milling machine. The sawing steps are as follows: profiles of different lengths are placed side by side on the feeding roller and then transported together. After being sawed once by the steel plate sawing and milling machine, the profiles are used as a reference. Then, the profiles are sawed several times according to the set program and then transported to the next process for processing. When the last cut is made, the tail material is sawed.

[0012] A further technical solution is that the sawing process for the tail material is as follows: after the clamping mechanism at the feeding roller moves to the limit position close to the saw blade, the clamping mechanism at the discharge roller also moves to the limit position close to the saw blade. Then, the clamping mechanism at the discharge roller clamps the profile, the clamping mechanism at the feeding roller releases the clamped profile, and then the clamping mechanism at the discharge roller moves to the set position according to the program setting to saw the tail material.

[0013] A further technical solution is that, after the sawing process of the tail material, there is a process in which the clamping mechanism at the discharge roller retracts to push the waste material after sawing the tail material back to the top of the tail material waste turning mechanism; after pushing the tail material waste back to the tail material waste turning mechanism, the waste material after sawing the tail material is turned over to ensure that the waste material falls into the chip removal mechanism; the maximum length of the profile is 18 meters.

[0014] The advantages and beneficial effects of this invention are as follows: by adding a clamping mechanism for sawing tail material, the problem of tail material not being able to be sawed is solved by setting two clamping mechanisms at the front and rear of the saw blade.

[0015] Because the edges (sides) of the profiles have burrs or curved, protruding parts, if a reference cylinder is not installed and instead the existing clamping mechanism is used with a fixed support on one side and a clamping cylinder on the other, even if the profile side is initially against the fixed support after the loading roller is installed and the piston rod of the clamping cylinder extends, when sawing to the last cut, the clamping mechanism behind the saw blade needs to move laterally towards the saw blade to change the clamping mechanism in front of the saw blade from clamping the material to clamping the material behind the saw blade. Therefore, if a fixed backing is set on the clamping mechanism, when the clamping mechanism behind the saw blade moves laterally toward the saw blade, the side of the fixed backing facing the clamping cylinder will collide with the burrs on the side of the profile. Therefore, by setting two cylinders opposite to each other on the base of the clamping mechanism, that is, a reference cylinder and a clamping cylinder, it is possible to avoid the clamping mechanism behind the saw blade from colliding or bumping with the burrs (or burrs or arc protrusions, etc.) on the side of the profile when switching between the front and rear clamping mechanisms.

[0016] The tail material turning mechanism and the material support frame fill the gap between the feeding roller and the discharging roller, avoiding the situation in the existing technology where a large gap between the feeding roller and the discharging roller requires the clamping position of the tail material to be closer to the center of the tail material (otherwise, if the clamping position is too close to the edge of the tail material, and there is a large gap between the feeding roller and the discharging roller, the safety of the tail material after clamping and conveying cannot be guaranteed, and the suspended end of the tail material may not be conveyed to the upper surface of the discharging roller, or even the tail material may rotate at the clamping point). The tail material turning mechanism can prevent the tail material from hitting the linear rail or hard rail near the milling machine frame during discharge. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a first embodiment of a sawing and milling machine including the profile tail sawing mechanism of the present invention;

[0018] Figure 2 yes Figure 1 Side view;

[0019] Figure 3 yes Figure 1 A bottom view;

[0020] Figure 4 This is a partial schematic diagram showing only the flipping mechanism and its surrounding area;

[0021] Figure 5 yes Figure 4 Top view;

[0022] Figure 6 yes Figure 4 Sectional view along line AA;

[0023] Figure 7 yes Figure 4 Diagram of the Q direction;

[0024] Figure 8 yes Figure 7 Diagram of the K-direction;

[0025] Figure 9 yes Figure 4 A three-dimensional schematic diagram of the tilting mechanism;

[0026] Figure 10 yes Figure 9 A diagram from another perspective;

[0027] Figure 11 This is a schematic diagram of Embodiment 2 of the present invention;

[0028] Figure 12 yes Figure 11 Side view;

[0029] Figure 13 yes Figure 11 A bottom view.

[0030] In the diagram: 1. Discharge roller conveyor; 2. Feeding roller conveyor; 3. Linear rail; 4. Base; 5. Frame; 6. Reference cylinder; 7. Clamping cylinder; 8. Gear motor; 9. Screw and nut mechanism; 10. Material support frame; 11. Tail and waste material turning mechanism; 12. Turning cylinder; 13. Folded connecting plate; 14. Drive block; 15. Turning plate; 16. Extension plate; 17. Slot; 18. Telescopic cylinder; 19. Connecting block; 20. Rectangular opening; 21. Gantry frame; 22. Power head; 23. Chip removal mechanism; 24. Airbag; 25. Baffle; 26. Stop block; 27. Push cylinder; 28. Columnar airbag. Detailed Implementation

[0031] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0032] Example 1: As Figures 1 to 10 As shown, the present invention is a profile tail sawing mechanism, including a clamping mechanism disposed at the discharge roller 1. The structure of the clamping mechanism at the discharge roller 1 is the same as that of the clamping mechanism at the loading roller 2. The clamping mechanism includes a base 4 slidably disposed on the linear rail 3. The base is connected to a drive mechanism fixedly connected to the milling machine frame 5 through a transmission mechanism. The base 4 is provided with clamping parts for clamping the profile.

[0033] The length direction of the base 4 is perpendicular to the material conveying direction; the clamping component includes two hydraulic cylinders arranged opposite to each other on the base of the clamping mechanism, namely a reference hydraulic cylinder 6 and a clamping hydraulic cylinder 7;

[0034] The drive mechanism is a geared motor 8, and the transmission mechanism is a lead screw and nut mechanism 9; the output shaft of the geared motor is fixedly connected to the lead screw of the lead screw and nut mechanism 9, the base 4 is fixedly connected to the nut of the lead screw and nut mechanism, and the nut is slidably set on the frame of the sawing and milling machine; the linear rail 3 is provided in a pair and the two linear rails are located on the outside of the discharge roller 1 and the loading roller 2;

[0035] A tail material and waste material turning mechanism 11 and a material support frame 10 are sequentially arranged between the feeding roller 2 and the discharging roller 1 along the material conveying direction. At least two rotatable rollers are mounted on the material support frame 10, with their upper surfaces tangent to each other flush with the upper surfaces of the rollers on the feeding roller 10. The upper surfaces of the rollers on the feeding roller 10 are flush with the upper surfaces of the rollers on the discharging roller 10. The tail material and waste material turning mechanism 11 includes a turning cylinder 12 fixedly mounted on the sawing and milling machine frame. The cylinder body of the turning cylinder is fixedly connected to the frame 5 via a folded connecting plate 13. The exposed end of the piston rod of the turning cylinder 12 is hinged to a drive block 14. The upper end of the drive block 14 is fixedly connected to an extension plate 16 that slides downwards from the turning plate 15. The extension plate is smaller than the turning plate in size. A pair of opposing support grooves 17 are fixedly provided on the lower surface of plate 15 for sliding extension plate 16. The lower end of drive block 14 is hinged to folded connecting plate 13, which is fixedly connected to the frame. The exposed end of the piston rod of telescopic cylinder 18 driving extension plate is fixedly connected to extension plate 16 through connecting block 19. The cylinder body of telescopic cylinder is fixedly connected to the lower surface of tilting plate but avoids the extension plate. A rectangular opening 20 is provided on extension plate to avoid interfering with the movement of extension plate. The upper end of drive block passes through the opening and is fixedly connected to tilting plate. There are two tilting cylinders that work synchronously, and the telescopic cylinder is located between the two tilting cylinders. The tilting direction of tilting plate is to discharge tail waste to the side edge of discharge roller.

[0036] A sawing and milling machine includes the aforementioned profile tail material sawing mechanism. The sawing and milling machine includes a frame 5, a gantry frame 21 is mounted on the frame, a power head 22 is mounted on the gantry frame 21, a saw blade is rotatably mounted on the power head, and the loading roller track 2 and the discharge roller track 1 are mounted on both sides of the gantry frame 21. A photoelectric sensor is provided on the frame near the power head.

[0037] A sawing method using the aforementioned milling and sawing machine includes the following sawing steps: profiles of varying lengths are placed side-by-side on the feeding roller conveyor and conveyed together. After being sawed once by the milling and sawing machine, the profiles are used as a reference. Then, according to a set program, the profiles are sawed several times and conveyed to the next process for further processing. When the last cut is made, the clamping mechanism at the feeding roller conveyor (i.e., in front of the saw blade along the profile conveying direction) moves to a position close to the limit of the saw blade. The clamping mechanism at the discharge roller conveyor (i.e., behind the saw blade) also moves to a position close to the limit of the saw blade. Then, the clamping mechanism at the discharge roller conveyor clamps the profile, and the clamping mechanism at the feeding roller conveyor releases the clamped profile. Finally, the clamping mechanism at the discharge roller conveyor moves to a set position according to the program setting (i.e., the required sawing length) to saw the tail material.

[0038] The clamping mechanism slides on the linear / hard rail driven by a screw and nut mechanism. After the photoelectric sensor detects the material's position, the feeding roller stops transporting (or other driving mechanisms stop transporting after receiving the information). The forklift mast (or other profiles) consists of several forklift masts arranged side by side, with different models and sizes. A cut is made first as a reference, so the length of the waste material after sawing may vary. After being flipped by a flipping mechanism (with a length extension plate for the waste material, perpendicular to the conveying direction), it falls into the chip removal mechanism 23.

[0039] After the sawing process of the tail material, there is a process in which the clamping mechanism at the discharge roller retracts to push the waste material after sawing back to the top of the waste material turning mechanism; after pushing the waste material back to the waste material turning mechanism, the waste material after sawing is turned over to ensure that the waste material falls into the chip removal mechanism; the maximum length of the profile is 18 meters.

[0040] The forklift mast consists of several units arranged side-by-side, each containing different sizes and models of steel plates (each with varying lengths, the longest being 18 meters). These plates are then cut using a steel plate sawing and milling machine (although called a sawing and milling machine, it is essentially a sawing machine or sawing machine; however, the surface finish of the cut steel plates can achieve the surface finish of milling, hence the applicant refers to it as a sawing and milling machine, meaning a sawing machine (or sawing machine) capable of achieving milling surface finish; for details on how the sawing precision reaches milling precision, please refer to the applicant's previous application, publication number CN116372260B). (Patent) First, a cut is made as a reference, and then the master material is cut several times according to the program design (for example, the first cut is one meter, the second cut is two meters) to complete the sawing of several finished products, which are then transported to the next process for processing; when flipping, two flipping cylinders act simultaneously, and the drive block rotates around the hinge point, thereby driving the flipping plate to rotate. During this process, the upper end of the drive block slides a small distance at the opening, and the extension cylinder moves when the flipping cylinder is activated, thus driving the extension plate to extend and preventing the tilted waste material from hitting the rail during the falling process.

[0041] Example 2: The difference from Example 1 is that, as shown in Example 2... Figures 11 to 13 As shown, the clamping mechanism includes a pair of airbags 24 arranged vertically at the feeding roller 2 and the discharging roller 1, respectively, with the airbags 24 positioned close to the power head 22; baffles 25 for limiting the lateral expansion of the airbags 24 are fixedly installed on the milling machine frame or the milling machine gantry frame, with four pairs of baffles, each pair located on both sides of the airbag (referring to the front and rear sides of the airbag along the material conveying direction); a stop block 26 is fixedly connected to the baffle 25 at the end of the airbag away from the profile between each pair of baffles 25; a wear-resistant layer is applied to the surface of the airbag facing the profile (to prevent burrs on the profile surface from puncturing the airbag).

[0042] Two pairs of vertically arranged airbags 24 are used. The width of the airbags is much smaller than that of the original clamping mechanism (i.e., the structure of a base sliding on the rail with a clamping cylinder on the base). Baffles are set on both sides of the airbags to effectively prevent the airbags from expanding laterally, ensuring that the airbags expand upwards and downwards after inflation. A stop is set at the end of the airbag away from the profile to effectively promote the airbag to expand towards the profile, so that the airbags are tightly pressed against the profile when clamping is required. According to the program settings, when the profile is transported to the sawing position by the drive mechanism, the drive mechanism stops running and the airbags inflate. After the airbags press against the profile, the power head actuates to perform sawing. The baffles prevent the saw blade from cutting the airbags, and the baffles, in conjunction with the airbags, make the entire clamping mechanism very narrow, effectively avoiding the problem of not being able to saw off the tail material. Because airbags are used, the clamping mechanism can be made very narrow. This allows the pair of airbags positioned vertically at the discharge roller to be placed much closer to the power head (e.g., on the crossbeam of the gantry frame near the power head, which is slidably mounted on the crossbeam). As long as this doesn't interfere with the power head's movement, the material support frame can be eliminated by using two pairs of vertically positioned airbags (i.e., four airbags, one pair each in front of and behind the saw blade). This avoids the problem in existing technologies where a large gap between the feeding and discharging rollers compromises the safety of the tail material after clamping and conveying, potentially leading to the tail material not being able to reach the upper surface of the discharge roller, or even rotating at the clamping point. Furthermore, because airbags are used to clamp the profile or steel plate from the surface (or upper and lower surfaces; i.e., the clamping position has changed), the problem of burrs on the profile side, which exists in the previous embodiment where clamping from the profile side, is avoided.

[0043] A sawing and milling machine includes the aforementioned profile tail material sawing mechanism. The sawing and milling machine includes a frame, a gantry frame mounted on the frame, a power head mounted on the gantry frame, a saw blade rotatably mounted on the power head, and a feeding roller and a discharge roller on both sides of the gantry frame. A photoelectric sensor is mounted on the frame near the power head. A push cylinder 27 is mounted on the feeding roller 2 near the power head 22. A cylinder ejection mechanism is mounted at the end of the feeding roller to discharge the tail material waste. This eliminates the need for the original chip removal mechanism located below the power head, and the discharge action is simpler and the mechanism is also simplified.

[0044] A sawing method using the aforementioned milling and sawing machine includes the following sawing steps: Profiles of varying lengths are placed side-by-side on the loading roller conveyor and conveyed together. After one cut by the milling and sawing machine, the profiles are used as a reference. Then, according to a pre-set program, the profiles are cut several times before being conveyed to the next processing step. At the final cut, a tailings sawing process is performed. The tailings sawing process is as follows: According to the program settings (i.e., the required cutting length), the clamping mechanism (i.e., the airbag in front of the saw blade along the profile conveying direction) at the loading roller conveyor inflates (after receiving the instruction, i.e., after the profile moves to the set position) to clamp the profile. The clamping mechanism (i.e., the airbag) at the discharge roller conveyor or located on the crossbeam (i.e., behind the saw blade) also inflates to clamp the profile. Then, the power head actuates to begin the final cut. After sawing, the airbag behind the saw blade deflates, while the airbag in front of the saw blade remains inflated to prevent the tailings waste from being driven away by the loading roller conveyor. The problem of the material being unable to be discharged is addressed by pushing cylinder 27 to actuate the airbag while simultaneously deflating it (or, if the airbag is only slightly deflated {a more preferred option is to stop deflating after a small amount of air is released}, the cylinder is then actuated, meaning the airbag stops clamping the profile and the cylinder immediately actuates to prevent the feed roller from rolling and driving the waste forward. Because the cylinder actuates immediately, the waste is pushed out of the frame). This pushes out the tail waste that was previously blocked by the airbag, thus achieving the discharge of the tail waste. Since the clamping mechanism is no longer a sliding setting, the linear guide is also eliminated, and there is no problem of the waste hitting the linear guide when it is discharged.Even without a material support frame, the pair of airbags positioned above and below the saw blade, close to the power head, prevent the cut profile from falling into the gap between the loading and unloading tracks. If the unloading track cannot transport the last piece of material after sawing, the baffles on both sides of the airbags behind the saw blade are no longer fixed but are instead slidable. These baffles slide on the crossbeam, effectively helping to transport the cut material a short distance when they slide to their maximum position away from the power head, thus avoiding the gap between the loading and unloading tracks. This way, the airbags do not deflate after sawing, and the baffles move towards the material... The material is conveyed in the conveying direction. When the tail material is positioned above the discharge roller and far enough from the saw blade that the discharge roller alone can drive the tail material conveying, the air bladder deflates and stops clamping the tail material, allowing it to be conveyed by the drive of the discharge roller. A push block is fixedly connected to the exposed end of the piston rod of the push cylinder. The height of the push block is slightly lower than the thickness of the profile being sawn, so that when the air bladder deflates, there is no need to worry about contact with the air bladder when the push cylinder actuates. Several spaced rollers are installed on the feeding roller, some of which are drive rollers driven by a geared motor to rotate and convey the profile. No rollers are installed directly below the baffle in front of the saw blade. The width of the upper baffle can be wider than the roller frame, while the width of the lower baffle 25 is smaller than the width of the roller frame to facilitate clamping the profile after the upper and lower airbags inflate. To prevent waste from hitting the roller frame of the feeding track when it is pushed out, several columnar airbags are provided below the rollers of the feeding track. After inflation, these columnar airbags 28 are slightly lower than the highest point of the airbags between the two lower baffles. The straight line formed by the apexes of these columnar airbags 28 after inflation forms an angle of less than 90° with the material conveying direction. {A more preferred solution is to set two rows of columnar airbags, with the apexes of the two rows of columnar airbags forming an X-shape after inflation}. After this setting... When the cylinder is pushed, the inflated cylindrical airbag prevents the pushed waste from tilting and falling. When the center of gravity of the waste reaches outside the roller frame, it tilts and falls off the roller frame, thus leaving the milling machine. Furthermore, since the airbags clamped at the top and bottom are only slightly deflated, the length direction of the sawn waste is basically perpendicular to the material conveying direction when the cylinder is pushed. Therefore, this setting also facilitates the discharge of waste, unlike the previous embodiment which had to worry about the waste being tilted to the material conveying direction and thus difficult to discharge (i.e., the waste will rotate when pushed). The top of the cylindrical airbag 28 can also be rotatably equipped with rollers to facilitate the discharge of waste.

[0045] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A sawing method, characterized in that, The sawing process is as follows: profiles of different lengths are placed side by side on the feeding roller of the milling machine and then transported together. After being sawed once by the milling machine, the profiles are used as a reference. Then, according to the set program, the profiles are sawed several times and then transported to the next process for processing. When the last cut is made, the tail material is sawed. The sawing process for the tail material is as follows: According to the program settings, the clamping mechanism (i.e., the airbag) at the feeding roller is inflated, and the airbags at the discharge roller or located on the crossbeam are also inflated. Then, the power head starts the final sawing cut. After sawing, the airbag behind the saw blade deflates, while the airbag in front of the saw blade remains inflated. After the airbags partially deflate, they stop deflating, which then drives the cylinder. The baffles on both sides of the airbags located above and below the saw blade slide on the crossbeam. After sawing, the airbags remain inflated, and the baffles convey the material in the material conveying direction. Then, when the tail material is located above the discharge roller and away from the saw blade, so that the tail material can be conveyed by the rotation of the discharge roller alone, the airbags deflate and no longer clamp the tail material. The cylinder then drives the cylinder. A push block is fixedly connected to the exposed end of the stop rod. The height of the push block is slightly lower than the thickness of the profile being sawn. Several rollers are spaced apart on the feeding roller track. Some of these rollers are drive rollers that rotate after being driven by a geared motor. No rollers are installed directly below the baffle in front of the saw blade. The width of the baffle above the profile is wider than the roller frame, and the width of the baffle below the profile is smaller than the width of the roller frame. Several columnar airbags are also installed below the rollers on the feeding roller track. When these columnar airbags are inflated, they are slightly lower than the highest point of the airbags between the two baffles below. The columnar airbags are arranged in two rows, and the apexes of the two rows of columnar airbags after inflation form an X shape. Rollers are rotatably installed at the top of the columnar airbags.

2. A profile tail material sawing mechanism, characterized in that, The sawing method described in claim 1 is used to saw off profile tail material, including a clamping mechanism to facilitate sawing the tail material. The clamping mechanism is located at the discharge roller, and the structure of the clamping mechanism at the discharge roller is the same as the structure of the clamping mechanism at the feeding roller.

3. The profile tail sawing mechanism according to claim 2, characterized in that, The clamping mechanism includes a base that is slidably mounted on a rail, and the base is connected to a drive mechanism that is fixedly connected to the frame of the milling machine via a transmission mechanism; the base is provided with clamping parts for clamping the profile.

4. The profile tail sawing mechanism according to claim 3, characterized in that, The length direction of the base is perpendicular to the material conveying direction; the clamping component includes two hydraulic cylinders fixedly disposed at opposite ends of the base along its length direction, one of which is a reference hydraulic cylinder and the other is a clamping hydraulic cylinder.

5. The profile tail sawing mechanism according to claim 4, characterized in that, The driving mechanism is a geared motor, and the transmission mechanism is a lead screw and nut mechanism. The output shaft of the geared motor is fixedly connected to the lead screw of the lead screw and nut mechanism, and the base is fixedly connected to the nut of the lead screw and nut mechanism. The nut is slidably mounted on the frame of the sawing and milling machine. The linear rails are provided in pairs and are located on the outside of the discharge roller and the loading roller.

6. The profile tail sawing mechanism according to claim 5, characterized in that, A tail material turning mechanism and a material support frame are sequentially installed between the feeding roller and the discharging roller along the material conveying direction. At least two rotatable rollers are installed on the material support frame, with their upper surfaces tangent to each other flush with the upper surfaces of the rollers on the feeding roller. The upper surfaces of the rollers on the feeding roller and the upper surfaces of the rollers on the discharging roller are flush. The tail material turning mechanism includes a turning cylinder fixedly mounted on the milling machine frame. The cylinder body is fixedly connected to the frame via a folded connecting plate. The exposed end of the piston rod of the turning cylinder is hinged to a drive block. The upper end of the drive block is fixedly connected to an extension plate that slides downwards from the turning plate. The extension plate is... The extension plate is smaller than the tilting plate in size. A pair of oppositely arranged grooves for sliding the extension plate are fixedly set on the lower surface of the tilting plate. The lower end of the drive block is hinged to the folded connecting plate, which is fixedly connected to the frame. The exposed end of the piston rod of the telescopic cylinder that drives the extension plate is fixedly connected to the extension plate through the connecting block. The cylinder body of the telescopic cylinder is fixedly connected to the lower surface of the tilting plate. A rectangular opening is provided on the extension plate to avoid interfering with the movement of the extension plate. There are two tilting cylinders that work synchronously, and the telescopic cylinder is located between the two tilting cylinders. The tilting direction of the tilting plate is to discharge the tail waste material to the side edge of the discharge roller.

7. A sawing and milling machine, characterized in that, The sawing and milling machine includes a profile tail sawing mechanism as described in any one of claims 2 to 6. The sawing and milling machine includes a frame, a gantry frame is provided on the frame, a power head is provided on the gantry frame, a saw blade is rotatably provided on the power head, and the feeding roller and the discharging roller are provided on both sides of the gantry frame; a photoelectric sensor is provided on the frame near the power head.

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