Metal band saw machine with angle adjustment facilitated

Abstract

The application relates to the field of industrial machinery manufacturing, in particular to a metal band sawing machine facilitating angle adjustment, which comprises an operation table, a speed reducer and a saw frame, the speed reducer is fixedly installed on the operation table top, one end of the back of the saw frame is fixedly connected with the output end of the speed reducer through a shaft coupling; a saw blade, a driving wheel and a driven wheel, the driving wheel and the driven wheel are both rotatably assembled in the two ends of the inner cavity of the saw frame through bearing seats, the closed loop saw blade is sleeved outside the driving wheel and the driven wheel to form a cutting transmission, the driving wheel is controlled to rotate by a first motor, the first motor is fixedly installed on the back of the saw frame; a guide part is arranged in the saw frame, the metal band sawing machine facilitating angle adjustment has multi-stage automatic chip removal and purification capacity, relies on a gradually-changing shrinkage inclined slot structure to extrude and crush hard and soft impurities on the surface of the saw blade, and cooperates with a slitting shear to shear large clippings and a wall scraping reinforcement to peel and clean.

Description

Technical Field

[0001] This invention relates to the field of industrial machinery manufacturing technology, specifically to a metal band saw that is easy to adjust in angle. Background Technology

[0002] In traditional metal band saws used for cutting irregular bevels in industrial machinery manufacturing, the saw blade is under constant eccentric load. During high-speed operation, it is prone to lateral swaying and vibration, which not only further deteriorates the quality of the cut surface but also causes severe one-sided wear and uneven tooth wear. The metal chips generated during cutting easily adhere to the tooth surface, grooves, and side gaps of the saw blade, forming built-up edge under high-temperature and high-pressure cutting conditions. This continuously scratches the workpiece cut surface, accelerates tooth wear, and can even lead to saw blade jamming, tooth breakage, localized stress concentration fracture, and other malfunctions, significantly reducing the saw blade's service life and resulting in poor equipment processing stability and operational continuity. Summary of the Invention

[0003] The present invention provides a metal band saw that is easy to adjust in angle, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a metal band saw that is easy to adjust in angle, comprising an operating table, a reducer, and a saw frame, wherein the reducer is fixedly installed on the operating table surface, and one end of the back of the saw frame is fixedly connected to the output end of the reducer via a coupling; The saw blade, drive wheel, and driven wheel are rotatably mounted at both ends of the inner cavity of the saw frame via bearing seats. The closed-loop saw blade is fitted around the drive wheel and driven wheel to form a cutting transmission. The drive wheel is controlled to rotate by a first motor, which is fixedly installed on the back of the saw frame. A guide section is provided inside the saw frame. The guide section includes two sets of guide blocks symmetrically arranged on both sides of the saw blade. The guide blocks are used to laterally constrain the saw blade to ensure that the saw blade always cuts in a straight line. The guide block has three slanted grooves on the side near the saw blade. The slanted grooves are arranged at an angle, with one end of the groove being higher than the other end, and the opening diameter of the groove at the higher end being larger than the opening diameter at the lower end.

[0005] Preferably, a scraper wall is integrally formed in the middle of the area where the guide block has an inclined groove; the scraper wall divides each inclined groove into an exposed section and a concealed section, which, in conjunction with the saw blade movement, enhances the scraping and peeling of debris.

[0006] Preferably, the guide block has a vertically opening discharge hole inside, which passes through three inclined grooves and extends downward to the bottom surface of the guide block. The scraped debris can be discharged downward through the discharge hole. Two slicing rods are fixedly installed at the outer end of the guide block.

[0007] Preferably, a short shaft is rotatably mounted in the inclined groove at the lower part of the guide block via a bearing, and a sliding groove is provided on the outer side of the short shaft. The groove wall and the outer wall of the short shaft are slidably fitted with a scraper.

[0008] Preferably, a spring is fixedly connected to the side wall of the scraper blade, and the end of the spring away from the scraper blade is fixedly connected to the inner wall of the inclined groove. In addition, each of the two sets of symmetrically arranged guide blocks has a trapezoidal block fixedly connected to its top, and both ends of the top of the trapezoidal block are provided with fitting grooves.

[0009] Preferably, it further includes a force adjustment part, which is disposed inside the saw frame and above the guide part. The force adjustment part includes a fixing frame, which is fixedly installed on the inner side of the saw frame. Two vertical connecting rods are provided, one fixedly installed at the bottom of the fixed frame and the other fixedly installed on the outer side of the back of the saw frame. The bottom ends of both vertical connecting rods are fixedly connected to the guide block.

[0010] Preferably, a hydraulic rod is fixedly installed on the top of the fixing frame, a connecting plate is sleeved on the hydraulic rod, the connecting plate is fixedly installed on the inner side of the saw frame, and an infrared sensor is fixedly installed on the bottom of the connecting plate. In addition, a sensor strip is fixedly installed on the surface of the operating table, and the surface of the sensor strip is coated with an infrared absorber.

[0011] Preferably, a sleeve is fixedly installed at the center of the bottom of the fixing frame, and vertical grooves are provided on both sides of the sleeve. The output end of the hydraulic rod passes through the upper and lower sides of the fixing frame and extends into the sleeve.

[0012] Preferably, stiffening plates are fixedly connected to the parts on both sides of the hydraulic rod corresponding to the vertical grooves, and fitting blocks and adjusting plates are fixedly connected to the bottom of the stiffening plates respectively; The fitting block fits into the fitting groove at the top of the trapezoidal block, and the bottom of the adjusting plate has a cylindrical groove in which a force-applying roller is rotatably installed via a shaft.

[0013] Preferably, a hydraulic cylinder is fixedly installed inside the operating table, and the top end of the hydraulic cylinder output end passes through the top of the operating table and is fixedly connected to a universal joint. The universal joint is rotatably installed on the other end of the back of the saw frame. The saw frame is internally fitted with a tensioning wheel, and a conveyor belt driven by a second motor is fixedly mounted on the back of the operating table.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention adopts an overall deflection orthogonal cutting structure for the saw frame, which can precisely adjust the saw blade posture according to the angle of the irregular inclined workpiece, so that the cutting direction of the saw blade is perpendicular to the normal of the inclined edge of the workpiece. This changes the traditional saw blade oblique scraping and side-pushing cutting method, and realizes vertical bite cutting of the saw teeth, which greatly improves the flatness and processing accuracy of the inclined cutting surface, and effectively reduces processing defects such as burrs and chipping.

[0015] 2. This invention features a bidirectional guiding anti-sway mechanism, which provides reliable lateral rigid constraint on the rotating saw blade, effectively suppressing saw blade vibration and lateral sway during high-speed cutting. This ensures the saw blade always feeds stably along a preset straight trajectory, preventing problems such as cutting deviation and tilted cut surfaces from the root, and continuously guaranteeing the cutting accuracy of irregularly shaped workpieces. In addition to anti-sway, it also has multi-stage automated chip removal and purification capabilities. Relying on the gradually shrinking inclined groove structure, it squeezes and crushes soft and hard impurities on the saw blade surface. Combined with slicing and shearing of large chips and wall scraping for enhanced peeling and cleaning, the chips are finally discharged through the through-hole. This thoroughly removes impurities embedded on the saw blade surface and in the tooth gaps, preventing chip accumulation from affecting the cutting quality.

[0016] 3. This invention features an elastic adaptive anti-built-up edge mechanism that can continuously adhere to the saw tooth surface to scrape away adhering materials and initial built-up edges, preventing scratches, misalignment, and accelerated saw tooth wear caused by cold welding of metal. Simultaneously, it can elastically avoid stubborn hard impurities, preventing rigid breakage of the scraping blade and balancing chip removal efficiency with structural protection.

[0017] 4. This invention is equipped with an infrared adaptive pressure balance adjustment mechanism, which can identify the tilt and skew stress state of the saw blade in real time, automatically perform dynamic pressure compensation on the high and low areas of the saw blade, balance the non-uniform load generated by tilted cutting, eliminate local stress concentration of the saw blade, effectively solve the problems of unilateral overload wear and stress fracture, and significantly extend the service life of the saw blade. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of a metal band saw that is easy to adjust in angle according to the present invention.

[0019] Figure 2 This is a schematic diagram of the connection structure of the driving wheel, driven wheel and saw blade of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the sensing strip of the present invention.

[0021] Figure 4 This is a schematic diagram of the trapezoidal block in the guide section of the present invention.

[0022] Figure 5 This is a schematic diagram of the inclined groove in the guide section of the present invention.

[0023] Figure 6This is a schematic diagram of the material outlet hole in the guide section of the present invention.

[0024] Figure 7 This is a schematic diagram of the scraping blade in the guide section of the present invention.

[0025] Figure 8 This is a cross-sectional view of the short axis in the guide section of the present invention.

[0026] Figure 9 This is a schematic diagram of the force adjustment part of the present invention.

[0027] Figure 10 This is a cross-sectional view of the force-applying ball bearing in the force adjustment section of the present invention.

[0028] Figure 11 This is a schematic diagram of the conveyor platform of the present invention.

[0029] In the diagram: 1. Control panel; 2. Reducer; 3. Saw frame; 4. Hydraulic cylinder; 5. Universal joint; 6. Guide section; 7. Drive wheel; 8. Driven wheel; 9. Saw blade; 10. Tensioning wheel; 11. First motor; 12. Conveyor table; 13. Force adjustment section; 61. Guide block; 62. Inclined groove; 63. Scraper; 64. Discharge hole; 65. Slicing piece; 66. Short shaft; 67. Slide groove; 68. Scraper blade; 69. Spring; 60. Trapezoidal block; 131. Fixing frame; 132. Vertical connecting rod; 133. Sleeve; 134. Hydraulic rod; 135. Connecting plate; 136. Infrared sensor; 137. Sensing strip; 138. Reinforcing plate; 139. Fitting block; 130. Adjusting plate; 1301. Force roller. Detailed Implementation

[0030] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. It should be understood that the described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1 to 11 This invention describes a metal band saw that is easy to adjust in angle according to an embodiment of the present invention.

[0032] This invention discloses a metal band saw that facilitates angle adjustment. When cutting irregularly shaped beveled workpieces with traditional metal band saws, if the saw blade 9 does not deflect and cuts the beveled side of the trapezoid vertically, the cutting direction of the saw blade 9 will form an angle with the normal (vertical direction) of the workpiece surface. This causes the saw teeth to "scrape" or "push" the material instead of "biting" it in, resulting in a rough, burr-filled cut surface and easy wear on one side of the saw blade 9. It also causes defects such as saw blade swaying, uneven force distribution, chip buildup, and easy breakage of the saw blade 9. The invention innovatively adopts an overall deflection orthogonal cutting structure for the saw frame 3, integrating an adaptive angle adjustment mechanism, a two-way guiding anti-sway chip removal mechanism, an elastic scraping anti-accumulated chip removal mechanism, and an infrared adaptive pressure vibration adjustment mechanism. This enables precise cutting of trapezoidal and irregularly shaped beveled metal workpieces along the vertical normal, while simultaneously achieving lateral limiting of the saw blade 9, graded chip removal, and dynamic balancing of cutting force, significantly improving the cutting accuracy of irregularly shaped workpieces and extending the service life of the saw blade 9.

[0033] This invention drives the saw frame 3 to deflect upwards with the output end of the reducer 2 as the center, so that the cutting direction of the saw blade 9 is completely perpendicular to the normal line of the inclined side of the trapezoidal workpiece used in industrial machinery manufacturing. Then, the second hydraulic cylinder in the operating table 1 drives the saw frame 3, hydraulic cylinder 4 and reducer 2 to move vertically downwards in sync. When the saw blade 9 is cutting soft metal, soft metal chips and hard impurities embedded in the tooth gaps and side gaps will adhere to its surface. The guide block 61 in the guide part 6 not only restricts the lateral deflection of the saw blade 9, but also removes soft metal and hard impurities.

[0034] The force adjustment unit 13 uses the connection and interruption of the sensing signal between the infrared sensor 136 and the sensing bar 137 to determine the horizontal and skew state of the saw blade 9, and then controls the hydraulic rod 134 to operate through the control terminal, thereby assisting in clamping the saw blade 9, enhancing the running stability of the saw blade 9, and suppressing the vibration of the saw blade 9.

[0035] Some embodiments of the present invention are described with reference to Figure 1 , Figure 2 and Figure 11 As shown, a trapezoidal irregular metal workpiece for industrial machinery manufacturing is placed on the pre-set processing position on the operating table 1, ensuring that the oblique edge of the workpiece to be cut is directly opposite the cutting area of ​​the saw blade 9. After the equipment is started, the output end of the reducer 2 drives the saw frame 3 to rotate controllably around the axis of the reducer 2 via a coupling; simultaneously, the hydraulic cylinder 4 inside the operating table 1 is started, and the top of the hydraulic cylinder 4 pushes the end of the saw frame 3 away from the reducer 2 through a universal joint 5, realizing the overall angle fine adjustment and smooth lifting of the saw frame 3. Finally, the second hydraulic cylinder inside the operating table 1 is started to drive the oblique saw frame 3, reducer 2 and hydraulic cylinder 4 to move downward, realizing the vertical downward cutting of the saw blade 9.

[0036] Some optional embodiments of the present invention are described in reference. Figure 1 As shown, the operating table 1 has a liftable support panel on its surface, and the reducer 2 is fastened to the support panel by bolts. The panel is supported by a set of second hydraulic cylinders located inside the operating table 1. Similarly, the hydraulic cylinder 4 is also supported and lifted by another set of second hydraulic cylinders. The purpose is to control the stroke of the second hydraulic cylinder in conjunction with the deflection angle of the saw frame 3, so as to ensure that the saw blade 9 can achieve vertical feed at any deflection angle.

[0037] During the cutting operation, the first motor 11 drives the drive wheel 7 to rotate, which in turn drives the closed-loop saw blade 9 to circulate around the drive wheel 7 and the driven wheel 8. This, together with the conveyor 12 driven by the second motor on the back of the operating table 1, enables stable feeding of the workpiece. At the same time, the tension wheel 10 connected by the shaft inside the saw frame 3 ensures that the saw blade 9 is always in a taut state, preventing loosening and tooth slippage, and ensuring continuous and stable cutting.

[0038] Specifically, the first motor 11 is fastened to the back of the saw frame 3 by bolts, and its output end passes through the back of the saw frame 3 and is keyed to the drive wheel 7. The driven wheel 8 is installed in the saw frame 3 through a shaft and a bearing seat.

[0039] The universal joint 5 consists of a base and a ball rotatably mounted in the base. The ball is welded and fixed to the output end of the hydraulic cylinder 4, while the base is fastened to the back of the saw frame 3 away from the reducer 2 by bolts. It has multi-directional rotation compensation capability, ensuring that the saw frame 3 deflects smoothly throughout the entire process and the angle adjustment is precise, so that the cutting direction of the saw blade 9 is completely perpendicular to the normal of the inclined side of the trapezoidal workpiece, realizing orthogonal perpendicular cutting of the irregular inclined surface workpiece.

[0040] Furthermore, the saw blade 9 is deflected to be perpendicular to the bevel, making the feed direction (vertical downward movement) of the saw blade 9 completely consistent with the normal direction of the workpiece surface. This is equivalent to performing a "tangent" or "straight cut" on the bevel. The saw teeth smoothly "vertically press into" the material, the cutting force is uniform, and the cut surface is flat and smooth, with precision and smoothness far exceeding that of traditional bevel cutting.

[0041] The guide portion 6 symmetrically arranged inside the saw frame 3 of the present invention provides a double-sided lateral rigid constraint for the saw blade 9, which can effectively limit the left and right sway and vibration of the saw blade 9 during high-speed operation, ensuring that the saw blade 9 always cuts accurately along a straight trajectory. At the same time, it can crush or remove soft metal chips that are temporarily attached to the saw blade 9 and chips that are embedded in the side grooves of the saw blade 9 due to external force.

[0042] Some embodiments of the present invention are described with reference to Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the core of the guide section 6 consists of two sets of symmetrical guide blocks 61. Three inclined grooves 62 with large diameter at a high position and small diameter at a low position are opened on the inner side of the guide blocks 61. In addition, the transmission direction of the saw blade 9 is the same as the direction from the large diameter to the small diameter of the inclined groove 62. During the operation of the saw blade 9, soft metal chips attached to the surface and hard impurities embedded in the tooth gaps and side gaps enter the groove body from the large diameter end of the inclined groove 62 with the saw blade 9. Thus, relying on the structural characteristics of the gradually shrinking inner diameter of the inclined groove 62, it plays the role of spatial compression and hard crushing of impurities and chips.

[0043] Furthermore, the inner walls of the upper and lower inclined surfaces of the inclined groove 62 form a fixed 5° angle with the direction of impurity movement, which can generate lateral extrusion force to quickly peel stubborn impurities off the surface of the saw blade 9, achieving preliminary chip removal and purification.

[0044] Some embodiments of the present invention are described with reference to Figure 5 and Figure 6 The guide block 61 has a transversely welded cutting slice 65 on the end near the larger diameter of the inclined groove 62. The cutting slice 65 is evenly arranged between the three inclined grooves 62 and is located on the high end side of the inclined groove 62. It is used to cut and divide large impurities and metal shavings that are not allocated to the inclined groove 62, thereby avoiding direct friction and scratching of the end face of the guide block 61 by large impurities and reducing the wear of the guide structure.

[0045] In addition, the guide block 61 has a scraper wall 63 integrally formed in the middle of the inclined groove 62 area. The scraper wall 63 is formed by the different diameters of the two ends of the inclined groove 62. At the same time, the scraper wall 63 divides each inclined groove 62 into two halves, with the right half being the exposed section and the left half being the concealed section. Impurities enter from the exposed section of the right half and are cut and crushed by the scraper wall 63 and the inclined groove 62. Therefore, the scraper wall 63 can simultaneously cooperate with the diameter of the inclined groove 62 to enhance the crushing and cutting of debris and impurities on the saw blade 9.

[0046] Some optional embodiments of the present invention are described below. Figure 5 and Figure 6 As shown, a discharge hole 64 is opened inside the guide block 61. The discharge hole 64 passes through three inclined grooves 62 in sequence and extends downward to the bottom surface of the guide block 61. The fine chips after scraping, crushing and shearing can be discharged downward through the vertically penetrating discharge hole 64 inside the guide block 61, realizing automated chip removal, avoiding chip jamming of the saw blade 9, and ensuring the continuity of cutting operation.

[0047] Some embodiments of the present invention are described with reference to Figure 6 , Figure 7 and Figure 8As shown, the guide part 6 also includes a scraper 68, which is located in the third inclined groove 62. This position corresponds to the key area of ​​the saw teeth and tooth grooves of the saw blade 9. The high temperature of sawing on the saw teeth and the high pressure friction on the tooth surface cause the metal to cold weld (adhere), which will stick firmly to the front face of the saw teeth and the tooth groove, and even form built-up edge, resulting in subsequent cutting deviation, cut surface scratches, and increased wear of the saw teeth. In this structure, under normal conditions, the spring 69 pushes the scraper 68 to fit against the surface of the saw teeth, which can scrape off the impurities and initial built-up edge on the tooth surface in real time, thereby preventing the parts of the saw teeth with impurities from causing deviation and wear on the cutting parts of the subsequent processed parts.

[0048] When encountering extremely hard and stubborn debris or foreign objects stuck in the blade, the scraper blade 68 is squeezed against the impurity, causing the scraper blade 68 to deflect in the direction of the saw blade 9 and to twist and compress the spring 69. One end of the spring 69 is welded and fixed to the inner wall of the third inclined groove 62, and the other end is welded and fixed to the scraper blade 68. Therefore, when one end of the spring 69 is twisted, it will contract (or stretch). In this design, it contracts. As the scraper blade 68 deflects along the short axis 66, it moves inward along the slide groove 67, automatically avoiding hard obstacles. This avoids rigid wear and breakage of the scraper blade 68, achieving the dual effect of chip removal and self-protection.

[0049] Some embodiments of the present invention are described with reference to Figure 9 and Figure 10 As shown, the force adjustment unit 13 is the core adaptive protection structure of the equipment. It is rigidly connected to the guide blocks 61 on both sides via the vertical connecting rod 132, and can rotate synchronously with the saw frame 3. During the angular rotation of the saw frame 3, the infrared sensor 136 at the bottom of the sleeve plate 135 moves synchronously, gradually deviating from the sensing strip 137 on the surface of the operating table 1 coated with infrared absorber. The absorption band of the infrared absorber matches the specific wavelength of the infrared sensor 136, thereby intercepting the specific wavelength of the infrared sensor 136, such as organic dyes. When the infrared beam of the sensor exceeds the coverage range of the absorbent coating, the sensor receives a feedback signal and transmits it to the terminal controller. The terminal drives the hydraulic rod 134 at the top of the fixing frame 131 to extend downward.

[0050] The infrared sensor 136 is a diffuse reflection infrared photoelectric sensor with an adjustable detection distance of 3-80mm. The sensing strip 137 is located at a specific position on the table surface of the operating table 1. When the deflection angle of the saw frame 3 is less than or equal to 3°, the sensor beam falls within the range of the sensing strip 137, and the signal is low level; when the deflection angle is greater than 3°, the sensor beam goes beyond the range of the sensing strip 137, the signal becomes high level, and the hydraulic rod 134 is triggered to extend.

[0051] Specifically, the infrared sensor 136 and the hydraulic rod 134 are fixed to the inner wall of the saw frame 3 through the sleeve plate 135; there are two vertical connecting rods 132, one of which is connected to the saw frame 3 at its top end through the fixing bracket 131, and the other is directly connected to the back of the saw frame 3.

[0052] Furthermore, during the downward movement of the hydraulic rod 134, the reinforcing plates 138 fixed on both sides of its output end move downwards simultaneously. The fitting block 139 at the bottom of the reinforcing plate 138 precisely engages and locks with the fitting groove of the trapezoidal block 60 at the top of the guide block 61, strengthening the connection rigidity between the guide part 6 and the force adjustment part 13. The force-applying roller 1301 at the bottom of the adjustment plate 130 moves downwards simultaneously, flexibly pressing against the tip of the inclined saw blade 9. The mating structure between the sleeve 133 and the reinforcing plate 138 can limit the extension and retraction trajectory of the hydraulic rod 134, ensuring a stable and non-deviation-free pressure adjustment process.

[0053] When the saw blade 9 is cutting vertically at an angle, the feed force will decompose into a lateral component force along the surface of the saw blade 9. This component force forces the saw blade 9 to produce lateral bending and lateral bias in the cutting area, resulting in a difference in the force state between the driving wheel 7 side and the driven wheel 8 side, causing greater pressure at the lower end and intensified vibration. Therefore, by setting the force-applying roller 1301 to apply a normal auxiliary constraint force (providing dynamic damping to consume the vibration energy brought by the component force), the lateral rigidity of the saw blade 9 at the deflection position is increased, and the lateral bending caused by the component force is suppressed.

[0054] Specifically, when the saw frame 3 is rotated to the set angle, although the cutting plane of the saw blade 9 is aligned with the normal to the hypotenuse of the trapezoidal workpiece, there is still an angle A between the vertical feed direction and the normal to the surface of the saw blade 9. At this time, the vertical feed force F generates two components: The normal cutting force Fn=F*cosA acts perpendicularly to the workpiece surface, enabling the saw teeth to effectively bite into the cutting surface. The lateral sliding component Ft=F*sinA acts along the surface of the saw blade 9. This component does not participate in cutting, but pushes the saw blade 9 to produce a lateral bending tendency and intensifies the lateral contact pressure between the saw blade 9 and the guide part 6, resulting in increased running resistance and increased local stress of the saw blade 9. The lower section near the drive wheel 7 is more significantly affected by vibration and off-center load.

[0055] To this end, the present invention provides a force adjustment unit 13. When the saw blade 9 deflects or tilts, the hydraulic rod 134 drives the adjustment plate 130 to move downward, causing the force-applying roller 1301 to apply an auxiliary normal constraint force to the top surface of the saw blade 9. This constraint force mainly produces the following two effects: (1) Enhance lateral rigidity: Increase the lateral support rigidity of the cutting section of the saw blade 9 in the inclined posture, effectively suppress the lateral bending deformation of the saw blade 9 caused by the lateral component force (Ft), and reduce the vibration and deviation during the cutting process; (2) Provide dynamic damping: The force roller 1301 forms elastic contact with the top surface of the saw blade 9. During the high-speed operation and intermittent cutting vibration of the saw blade 9, the abnormal vibration energy caused by the lateral component force (Ft) is consumed by the rolling friction damping between the roller and the saw blade 9, and the running posture of the saw blade 9 is stabilized.

[0056] This force adjustment structure does not change the original transmission tension of the saw blade 9. Instead, it compensates for the lateral force disturbance generated by inclined cutting through auxiliary constraint, ensuring the smooth operation of the saw blade 9 under deflection conditions, reducing local stress concentration, and avoiding saw blade 9 breakage or abnormal wear caused by unilateral overload.

[0057] Specifically, the fitting block 139 is welded and fixed to the bottom of the stiffening plate 138. The fitting block 139 moves down and fits into the trapezoidal block 60 fixed to the top of the guide block 61, thereby strengthening the connection between the guide part 6 and the force adjustment part 13 and increasing stability.

[0058] In addition, the adjusting plate 130 is welded and fixed to the bottom of the stiffening plate 138, and the force-applying roller 1301, which is installed at the bottom of the adjusting plate 130 by rotating the shaft, moves down with the output end of the hydraulic rod 134 and contacts and presses against the top plane of the saw blade 9, thereby reducing local stress concentration and avoiding breakage or abnormal wear of the saw blade 9 caused by unilateral overload.

[0059] In summary, this band saw achieves orthogonal perpendicular cutting of irregularly shaped inclined workpieces by deflecting the entire saw frame 3, solving the problems of poor accuracy and low surface quality in traditional inclined cutting; it achieves real-time self-cleaning of the saw blade 9 by relying on multi-stage guiding chip removal and elastic anti-accumulation edge structure; and it dynamically adjusts the force on the saw blade 9 through an infrared adaptive force balancing mechanism, combining the advantages of convenient angle adjustment, high cutting accuracy, strong self-protection, and good stability, making it suitable for high-precision cutting and processing scenarios of various irregularly shaped and inclined metal workpieces.

[0060] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made by those skilled in the art based on the above concepts without creative effort shall fall within the scope of protection of the present invention.

Claims

1. A metal band saw that is easy to adjust in angle, characterized in that, include: The system includes an operating table, a speed reducer, and a saw frame. The speed reducer is fixedly installed on the operating table surface, and one end of the back of the saw frame is fixedly connected to the output end of the speed reducer via a coupling. The saw blade, drive wheel, and driven wheel are rotatably mounted on both ends of the inner cavity of the saw frame via bearing seats. The closed-loop saw blade is fitted on the outside of the drive wheel and the driven wheel to form a cutting transmission. The drive wheel is controlled to rotate by a first motor, which is fixedly installed on the back of the saw frame. A guide section is provided inside the saw frame. The guide section includes two sets of guide blocks symmetrically arranged on both sides of the saw blade. The guide blocks are used to laterally constrain the saw blade to ensure that the saw blade always cuts in a straight line. The guide block has three slanted grooves on the side near the saw blade. The slanted grooves are arranged at an angle, with one end of the groove being higher than the other end, and the opening diameter of the groove at the higher end being larger than the opening diameter at the lower end.

2. The metal band saw machine with easily adjustable angle according to claim 1, characterized in that: The guide block has an integrally formed scraper wall in the middle of the area where the inclined groove is opened; the scraper wall divides each inclined groove into an exposed section and a concealed section, which, together with the movement of the saw blade, strengthens the scraping and peeling of debris.

3. A metal band saw machine with easily adjustable angle according to claim 2, characterized in that: The guide block has a vertically opening discharge hole inside. The discharge hole passes through three inclined grooves in sequence and extends downward to the bottom surface of the guide block. The scraped debris can be discharged downward through the discharge hole. Two slicing rods are fixedly installed at the outer end of the guide block.

4. A metal band saw machine with easily adjustable angle according to claim 1, characterized in that: A short shaft is rotatably mounted in the inclined groove at the bottom of the guide block via a bearing. A sliding groove is provided on the outer side of the short shaft, and a scraper blade is slidably assembled on the groove wall and the outer wall of the short shaft.

5. A metal band saw machine with easily adjustable angle according to claim 4, characterized in that: A spring is fixedly connected to the side wall of the scraper blade, and the end of the spring away from the scraper blade is fixedly connected to the inner wall of the inclined groove. In addition, each of the two sets of symmetrically arranged guide blocks has a trapezoidal block fixedly connected to its top, and both ends of the top of the trapezoidal block are provided with fitting grooves.

6. A metal band saw machine with easily adjustable angle according to claim 5, characterized in that: It also includes a force adjustment part, which is disposed inside the saw frame and above the guide part. The force adjustment part includes a fixing frame, which is fixedly installed on the inner side of the saw frame. Two vertical connecting rods are provided, one fixedly installed at the bottom of the fixed frame and the other fixedly installed on the outer side of the back of the saw frame. The bottom ends of both vertical connecting rods are fixedly connected to the guide block.

7. A metal band saw machine with easily adjustable angle according to claim 6, characterized in that: A hydraulic rod is fixedly installed on the top of the fixed frame, and a connecting plate is sleeved on the hydraulic rod. The connecting plate is fixedly installed on the inner side of the saw frame, and an infrared sensor is fixedly installed on the bottom of the connecting plate. In addition, a sensor strip is fixedly installed on the surface of the operating table, and the surface of the sensor strip is coated with an infrared absorber.

8. A metal band saw machine with easily adjustable angle according to claim 7, characterized in that: A sleeve is fixedly installed at the center of the bottom of the fixed frame. Vertical grooves are provided on both sides of the sleeve. The output end of the hydraulic rod passes through the upper and lower sides of the fixed frame and extends into the sleeve.

9. A metal band saw machine with easily adjustable angle according to claim 8, characterized in that: The hydraulic rod is fixedly connected to the vertical groove on both sides with stiffening plates, and the bottom of the stiffening plates is fixedly connected to a fitting block and an adjusting plate respectively. The fitting block fits into the fitting groove at the top of the trapezoidal block, and the bottom of the adjusting plate has a cylindrical groove in which a force-applying roller is rotatably installed via a shaft.

10. A metal band saw machine with easily adjustable angle according to claim 1, characterized in that: A hydraulic cylinder is fixedly installed inside the operating table. The top of the output end of the hydraulic cylinder passes through the top of the operating table and is fixedly connected to a universal joint. The universal joint is rotatably installed on the other end of the back of the saw frame. The saw frame is internally fitted with a tensioning wheel, and a conveyor belt driven by a second motor is fixedly mounted on the back of the operating table.

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