A cam rotary saw cutting mechanism and a rotary saw cutting method

Abstract

The application belongs to the technical field of material cutting equipment, and particularly relates to a cam rotary saw cutting mechanism and a rotary saw cutting method, which are suitable for cutting workpieces on a synchronous belt moving conveying mechanism and comprise a saw cutting seat, a driving unit, a cam rotating mechanism and a saw cutting mechanism. The driving unit is arranged on the saw cutting seat. The cam rotating mechanism is connected with the driving unit and comprises a cam. The saw cutting mechanism comprises a swing arm, a fixed shaft and a saw blade. The swing arm is connected with the cam through a cam bearing. The first end of the swing arm is rotatably arranged on the saw cutting seat through the fixed shaft, and the second end of the swing arm is provided with the saw blade. The cam rotates under the driving of the driving unit and drives the swing arm to rotate around the fixed shaft. The saw blade moves along a direction perpendicular to the direction in which the synchronous belt moving conveying mechanism transmits workpieces under the driving of the swing arm, and the workpieces are cut and separated.

Description

Technical Field

[0001] This application belongs to the technical field of material cutting equipment, and in particular relates to a cam-driven rotary sawing mechanism and a rotary sawing method. Background Technology

[0002] On automated production lines, it is often necessary to cut continuously conveyed strip-shaped materials (such as plastic profiles, wood strips, rubber strips, etc.) to a fixed length. Traditional cutting methods mostly use cylinder-driven sawing devices, whose saw blades move in a linear reciprocating motion to cut the material intermittently. However, cylinder-driven sawing has low precision and causes greater impact during the sawing process, which can easily lead to defects such as chipping and burrs on the cut edges of the material, affecting the appearance quality of the product and the accuracy of subsequent assembly.

[0003] To address the chipping issue during the cutting process, those skilled in the art have explored various improvement solutions. One common approach is to use a servo motor to drive the saw blade in a rotary feed motion, optimizing the angle and path of the saw blade's entry into the workpiece to reduce cutting impact.

[0004] However, because the movement trajectory of the saw blade in this type of solution is relatively simple, it is difficult to accurately control the angle and speed at which the saw blade cuts into the workpiece. Especially during the cutting in and cutting out stages, the contact state between the saw blade and the material changes drastically, which can easily lead to stress concentration at the cut edge, causing thin-walled or brittle materials to chip.

[0005] Furthermore, in continuous conveying scenarios, the spatial coordination between the sawing mechanism and the conveying mechanism is also a crucial factor affecting cutting quality. If the saw blade interferes with the conveyor belt, it will not only damage the equipment but also exacerbate edge chipping due to instability in the cutting process.

[0006] Therefore, there is an urgent need for a sawing mechanism to achieve precise motion control of the saw blade, so as to completely solve the problem of edge chipping while maintaining high-efficiency production. Summary of the Invention

[0007] This invention solves at least to some extent the above-mentioned technical problems and provides a cam-driven rotary sawing mechanism and a rotary sawing method. The cam drives the swing arm to achieve precise compound motion and forms a spatial cooperation with the synchronous belt moving conveyor mechanism, thereby completing high-precision, chip-free rotary cutting of the workpiece during continuous conveying.

[0008] The first aspect of this disclosure provides a cam-driven rotary sawing mechanism suitable for cutting workpieces on a synchronous belt conveyor, comprising: sawing stand; The drive unit is mounted on the sawing base; A cam rotation mechanism, connected to the drive unit, includes a cam; The sawing mechanism includes: A swing arm is connected to the cam via a cam bearing. The first end of the swing arm is rotatably mounted on the sawing seat via a fixed shaft, and the second end of the swing arm is provided with a saw blade. The cam rotates under the drive of the drive unit, and drives the swing arm to rotate around the fixed axis. The saw blade moves along the direction perpendicular to the synchronous belt conveyor mechanism to transport the workpiece under the drive of the swing arm, and rotates to cut the workpiece.

[0009] The technical solution provided in this application brings at least the following benefits: by driving the swing arm to rotate through the cam, the saw blade cuts into the workpiece along a direction perpendicular to the conveying direction, thereby achieving rotary cutting, effectively avoiding edge chipping, and improving cutting accuracy.

[0010] In other embodiments of this application, the sawing mechanism further includes a linear guide rail disposed on the sawing seat and connected to the swing arm to form a track space along the extension direction of the swing arm. The swing arm is located within the track space so that the linear guide rail guides the extension movement of the swing arm.

[0011] The technical solution provided in this application brings at least the following benefits: the extension movement of the swing arm is guided by the linear guide rail, ensuring the smoothness and positional accuracy of the saw blade movement, and further improving the quality of the cutting surface.

[0012] In other embodiments of this application, the synchronous belt moving conveyor includes a synchronous belt, at least a portion of the path of the synchronous belt forming an inverted "V" shaped bend, and a portion of the rotational sawing trajectory of the saw blade is located within the open space formed by the bend.

[0013] The technical solution provided in this application brings at least the following beneficial effects: by making the rotational sawing trajectory of the saw blade fall into the open space formed by the bending path, physical interference between the saw blade and the timing belt is avoided during the sawing process, thus realizing dynamic cutting during continuous conveying.

[0014] In some embodiments of this application, the cam-rotating sawing mechanism further includes a sawing table disposed within the open space formed by the bending path, and the saw blade rotates and cuts the workpiece on the sawing table.

[0015] The technical solution provided in this application has at least the following beneficial effects: it provides stable support for the workpiece through the sawing table, ensures that the workpiece position is fixed during the cutting process, further improves the cutting accuracy, and protects the saw blade from damage.

[0016] In other embodiments of this application, the rotation axis of the saw blade is parallel to and spaced apart from the rotation axis of the swing arm about the fixed axis.

[0017] The technical solution provided in this application has at least the following beneficial effects: by setting the axes to be parallel and spaced apart, the saw blade can cut into the workpiece at the optimal angle during the rotational cutting process, thereby reducing cutting resistance.

[0018] In other embodiments of this application, the linear guide rail includes: A guide rail is provided on the sawing seat along the extension direction of the swing arm; The slider is slidably mounted on the guide rail and fixedly connected to the swing arm. The slider moves linearly along the guide rail under the drive of the swing arm.

[0019] The technical solution of this application brings at least the following benefits: through the cooperation of the guide rail and the slider, low friction and high rigidity guidance are achieved, ensuring the accuracy of the extension action of the swing arm, thereby ensuring the consistency of sawing.

[0020] In other embodiments of this application, the driving unit includes: A servo motor is mounted on the sawing stand; The speed reducer has its input end connected to the output shaft of the servo motor and its output end connected to the cam.

[0021] The technical solution provided in this application brings at least the following beneficial effects: by driving the cam with a servo motor and a reducer, the rotation speed and position of the cam can be precisely controlled, thereby flexibly adjusting the sawing speed and trajectory to adapt to the cutting needs of different materials.

[0022] In other embodiments of this application, the cam-rotating sawing mechanism further includes a dust collection hood, which is disposed outside the saw blade to collect dust and debris generated during the sawing process and to protect the sawing area.

[0023] The technical solution provided in this application brings at least the following beneficial effects: effectively collecting dust through the dust collection hood improves the working environment, while preventing debris from splashing and ensuring operational safety.

[0024] A second aspect of the present disclosure provides a rotary sawing method, implemented based on a cam-driven rotary sawing mechanism provided in the first aspect of the present disclosure. The method includes: Start the drive unit to drive the cam rotation mechanism to rotate; The cam rotation mechanism drives the swing arm (5) to rotate around the fixed axis (6); The saw blade (9) moves along the direction perpendicular to the synchronous belt conveyor mechanism for transporting the workpiece under the drive of the swing arm (5), and rotates to cut the workpiece.

[0025] Compared with the prior art, the present invention has the following beneficial effects: (1) The cam drives the swing arm to rotate, and the cam profile curve precisely controls the movement trajectory of the saw blade, so that the saw blade cuts into the workpiece at the optimal angle, effectively suppressing edge chipping and improving the quality of the cut end face.

[0026] (2) By utilizing the open space formed by the bending path of the synchronous belt, the sawing trajectory is spatially offset from the synchronous belt, realizing non-interference dynamic cutting during the continuous material conveying process, which greatly improves production efficiency.

[0027] The above description is merely an overview of the technical solution disclosed herein. In order to better understand the technical means of this disclosure and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure are described below. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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.

[0029] Figure 1 This is a schematic diagram of the overall structure of the cam-rotating sawing mechanism according to an embodiment of this application; Figure 2 This is a partial structural diagram of the cam-rotary sawing mechanism according to an embodiment of this application. Figure 1 ; Figure 3 This is a partial structural diagram of the cam-rotary sawing mechanism according to an embodiment of this application. Figure 2 ; Figure 4 This is a partial structural diagram of the cam-rotary sawing mechanism according to an embodiment of this application. Figure 3 ; Figure 5 This is a schematic flowchart of the rotary sawing method according to an embodiment of this application; In the above figures: 1. Saw base, 2. Drive unit, 3. Cam, 4. Cam bearing, 5. Swing arm, 6. Fixed shaft, 7. Linear guide rail, 8. Saw blade motor, 9. Saw blade, 10. Slider, 11. Bending path, 12. Cam rotation sawing mechanism, 13. Synchronous belt moving conveyor mechanism, 14. Frame. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0031] The prefixes such as "first" and "second" used in this application embodiment are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this application embodiment does not constitute a limitation on the described objects. The description of the described objects is given in the claims or the context of the embodiments, and should not constitute unnecessary restrictions due to the use of such prefixes. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.

[0032] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B; the term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone.

[0033] In the embodiments of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] Existing sawing equipment generally suffers from low cutting accuracy and chipping issues when handling continuously conveyed materials. This is especially true when cutting thin-walled or brittle materials. Traditional cylinder-driven linear cutting or simple swing-arm rotary cutting struggles to precisely control the instantaneous state of the saw blade's entry and exit from the material, leading to stress concentration at the cut edge and frequent chipping defects. Some solutions use servo motors to directly drive the swing arm rotation, causing the saw blade to cut into the material along an arc trajectory, which improves cutting quality to some extent. However, due to the unidirectional motion trajectory, these solutions still have significant limitations in solving the chipping problem. Furthermore, achieving interference-free cooperation between the saw blade and the conveying mechanism under continuous material transport conditions is also a key factor restricting equipment efficiency and cutting quality.

[0036] To address the aforementioned technical problems, this application provides a cam-driven rotary sawing mechanism and a rotary sawing method. By driving the saw blade to rotate perpendicular to the conveying direction, precise control of the sawing trajectory is achieved, thereby effectively preventing material chipping. The technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0037] like Figure 1 As shown, a first aspect of this disclosure provides a cam-rotary sawing mechanism 12 suitable for cutting workpieces on a synchronous belt conveyor mechanism 13. Figure 2 , 3 As shown in Figure 4, the cam rotation sawing mechanism 12 includes a sawing seat 1, a drive unit 2, a cam rotation mechanism, and a sawing mechanism.

[0038] The sawing base 1 is fixed to the frame 14 as a mounting base.

[0039] The drive unit 2 is mounted on the sawing base 1.

[0040] The cam rotation mechanism is connected to the drive unit 2 and includes a cam 3.

[0041] The sawing mechanism includes a swing arm 5, a fixed shaft 6, and a saw blade 9. The swing arm 5 is connected to the cam 3 via a cam bearing mounted on the cam 3. The first end of the swing arm 5 is rotatably mounted on the sawing base 1 via the fixed shaft 6, and the second end of the swing arm 5 is provided with a saw blade 9, which is arc-shaped and driven by a saw blade motor 8.

[0042] In this process, the cam 3 rotates under the drive of the drive unit 2, and drives the swing arm 5 to rotate around the fixed shaft 6. The saw blade 9 moves along the direction perpendicular to the synchronous belt conveyor to transport the workpiece under the drive of the swing arm, and rotates to cut the workpiece.

[0043] The profile curve of cam 3 can be pre-designed according to the cutting process requirements. Through its connection with drive unit 2 and swing arm 5, the continuous rotational motion of drive unit 2 is transformed into a specific motion law of swing arm 5. Compared with the instantaneous impact of cylinder drive or the rigid motion of direct servo drive in the prior art, cam drive can realize the smooth change of acceleration of saw blade in each stage of cutting in, cutting, and cutting out, avoiding the impact caused by sudden motion changes. Specifically, firstly, during straight cutting, saw blade 9 feeds along a straight line. At the moment of cutting in, the contact line between saw blade 9 and workpiece is established almost simultaneously along the entire width of saw blade. For a workpiece with a thickness of d, the contact area of ​​saw blade at the moment of cutting in jumps rapidly from 0 to a rectangular area of ​​approximately d × saw blade thickness. The process of establishing cutting force is extremely steep, forming an instantaneous impact load. During rotary cutting in, saw blade 9 gradually cuts into workpiece in a rotating manner. The contact between saw blade 9 and workpiece starts from point contact. As the rotation angle of swing arm 5 increases, the contact gradually expands to line contact and then develops into surface contact. The change in contact area is a continuous and gradual process, with the cutting force increasing synchronously with the contact area, without abrupt peaks. This smooth force build-up process avoids damage to the material edges caused by impact loads. Secondly, during straight cutting, when the saw blade 9 cuts in simultaneously as a whole, the cutting thickness along the width of the saw blade is basically the same, and all saw teeth bear the same cutting load simultaneously, generating a concentrated resultant force of radial and tangential forces. However, during rotary cutting, due to the circular motion of the saw blade 9, the cutting depth of the saw teeth at different positions relative to the workpiece varies. The saw teeth at the bottom of the arc have the largest cutting depth, gradually decreasing towards both sides, forming a cutting thickness distribution that is large in the middle and small at both sides. This distribution causes the cutting force to be distributed in a gradient along the circumference of the saw blade, avoiding the concentration of force at a single location, while multiple saw teeth share the cutting load, reducing the force on a single saw tooth. Thirdly, during straight cutting, the direction of the cutting force is basically fixed, perpendicular to the feed direction of the saw blade 9, and the vector direction of the force is singular, which easily forms concentrated tensile or compressive stress within the material. During rotary cutting, as the saw blade 9 moves along the arc, the direction of movement at different points on the saw blade 9 changes continuously, and the direction of the cutting force at each point also changes accordingly. Points on the cutting side of the saw blade 9 have a downward velocity component, generating a downward cutting force; points on the cutting exit side of the saw blade 9 have an upward velocity component, generating an upward cutting force. This vector synthesis of multi-directional forces disperses the overall cutting force in space, avoiding the concentrated effect of a single-directional force on the material edge. Finally, in straight cutting, material fracture occurs instantaneously, and the crack propagation rate is difficult to control, easily resulting in irregular tearing at the cut edge. However, during rotary cutting, the saw blade 9 gradually cuts along the arc, and material fracture begins at the point of entry and gradually propagates along the direction of movement of the saw blade 9. The fracture process is controlled by the movement speed of the saw blade 9, and crack propagation is orderly and controllable. Simultaneously, the continuous support provided by the saw blade 9 to the fractured area suppresses secondary material breakage.

[0044] In summary, the cam-driven rotary cutting method of this application fundamentally changes the way cutting forces are established and distributed through multiple mechanisms, including gradual changes in contact area, gradient distribution of cutting thickness, vector decomposition of cutting force direction, and gradual control of the fracture process. This force dispersion effect avoids instantaneous, concentrated, and unidirectional impact loads in straight cutting, making the cutting process smooth and controllable. This effectively suppresses stress concentration and tearing tendency at the material edge, ultimately achieving high-quality cutting without chipping.

[0045] In a specific illustrative embodiment, such as Figure 2 , 3 As shown in Figure 4, the sawing mechanism also includes a linear guide rail 7, which is disposed on the sawing base 1 and connected to the swing arm 5 to form a track space along the extension direction of the swing arm 5. The swing arm 5 is located in the track space so that the linear guide rail 7 guides the extension movement of the swing arm 5.

[0046] Specifically, the linear guide 7 is arranged along the extension direction of the swing arm 5, and its connection with the swing arm 5 forms a sliding fit. The internal structure of the linear guide 7 forms a track space extending along the extension direction, and at least a portion of the swing arm 5 is located within this track space, constrained and limited by the track space.

[0047] With the introduction of the linear guide 7, the rocker arm 5 is allowed to extend linearly along the direction specified by the linear guide while rotating around the fixed axis. This new degree of freedom is not unrestrained free motion, but a forced composite motion jointly controlled by the contour of the cam 3 and the guidance of the linear guide 7: the rotation angle of the cam 3 determines the theoretical position of the rocker arm 5, while the linear guide 7 constrains the actual motion path of the rocker arm 5 in that theoretical position, decomposing the motion of the rocker arm 5 into a vector synthesis of the rotational component around the fixed axis 6 and the linear component along the linear guide 7.

[0048] Because the profile curve of cam 3 can be pre-designed and the direction of linear guide 7 can be pre-set, the combination of the two makes the final motion trajectory of saw blade 9 highly programmable. The profile of cam 3 determines the rotation and extension relationship of swing arm 5 at every moment, and linear guide 7 ensures that this relationship is executed precisely, so that saw blade 9 can move along any planar curve desired by the designer (exemplary, elliptical arc, involute, multi-segment combination curve), rather than a single circular arc. This flexibility of trajectory cannot be achieved by pure rotational motion or pure linear motion.

[0049] The technical solution of this application, through the introduction of the linear guide rail 7, expands the motion trajectory of the saw blade 9 from a rotational motion dominated by the cam profile to a composite motion of rotation and linear extension, significantly improving the controllability and adaptability of the sawing trajectory. The composite motion enables the saw blade 9 to enter, cut, and exit the material at a more optimized angle and path, further dispersing the cutting force, reducing impact, and suppressing edge chipping, while providing a structural basis for customized cutting of workpieces with different materials and cross-sections.

[0050] In a specific illustrative embodiment, such as Figure 1 As shown, the synchronous belt conveyor mechanism 13 includes a synchronous belt, which is a closed loop belt with an upper conveying section at the top and a lower conveying section at the bottom. The upper conveying section is used to place the workpiece to be cut, and the lower conveying section is used to form a return path. In this embodiment, through a specific arrangement of multiple driven synchronous pulleys, the synchronous belt is deviated from the original horizontal conveying plane in a local area, first bending downwards and then bending back upwards to form an inverted "V"-shaped bending path 11. At least a portion of the synchronous belt path is concave downwards to form the inverted "V"-shaped bending path 11, and part of the rotational sawing trajectory of the saw blade 9 is located within the open space formed by the bending path 11.

[0051] When the saw blade 9 performs the cutting action, its movement path and the bending path of the timing belt form an intersecting relationship in space: the saw blade 9 enters the open space from above, completes the cutting of the workpiece in the open space, and then exits; as for the timing belt, it bypasses the working area of ​​the saw blade 9 from below and avoids the movement trajectory of the saw blade through the bending path 11.

[0052] During equipment operation, the synchronous belt conveyor 13 operates continuously, with its upper conveying section carrying the workpiece and moving smoothly along the conveying direction. When the workpiece is conveyed to the predetermined sawing position, the cam-rotating sawing mechanism 12 starts working. First, the drive unit 2 drives the cam 3 to rotate, which pushes the swing arm 5 to rotate around the fixed shaft 6 and extend through the cam bearing 4. Then, the swing arm 5 drives the saw blade 9 into the open space. Subsequently, the saw blade 9 rotates and cuts the workpiece located above it in the open space. After sawing is completed, the swing arm 5 drives the saw blade 9 out of the open space and resets. Finally, the synchronous belt continues to operate, conveying the cut workpiece forward while bringing subsequent workpieces into the sawing position. Throughout the entire operation, the conveying motion of the synchronous belt is continuous and uninterrupted, and the sawing action of the saw blade 9 is completed in the open space, with neither interfering with the other in space.

[0053] The technical solution of this application enables the bending path 11 of the synchronous belt and the sawing trajectory of the saw blade 9 to form a spatial fit through the open space, so that the sawing mechanism can perform precise cutting without interference while the workpiece is continuously transported, providing a structural basis for efficient and high-quality production operations.

[0054] In a specific illustrative embodiment, such as Figure 1 As shown, the cam-rotating sawing mechanism 12 also includes a sawing table, which is set in the open space formed by the bending path 11, and the saw blade 9 rotates to cut the workpiece on the sawing table.

[0055] The sawing table is used to support the workpiece. Specifically, the sawing table has a groove in the middle, and a wooden pad is placed inside the groove. After the saw blade 9 cuts the workpiece, it continues to cut downward into the wooden pad, avoiding direct cutting of the metal table surface of the sawing table, thus buffering and protecting the saw blade.

[0056] The technical solution of this application further stabilizes the position of the workpiece during the cutting process by setting up the sawing table, preventing the workpiece from shaking, thereby improving the flatness of the cut end face.

[0057] In a specific illustrative embodiment, such as Figure 3 As shown, the rotation axis of the saw blade 9 is parallel to and spaced apart from the rotation axis of the swing arm 5 around the fixed shaft 6.

[0058] Specifically, the first end of the swing arm 5 is rotatably mounted on the sawing base 1 via a fixed shaft 6, forming a first axis of rotation for the swing arm 5 around the fixed shaft 6. The saw blade 9 is mounted on the second end of the swing arm 5, and rotates at high speed around the saw blade spindle to perform cutting, forming a second axis of rotation for the saw blade 9. The first and second axes of rotation are parallel to each other, and the distance (i.e., eccentricity) perpendicular to the axis is a predetermined value. That is, the center of rotation of the saw blade 9 is not located on the axis of rotation of the swing arm 5, but is offset by a certain distance.

[0059] The presence of eccentricity causes the cutting force on the saw blade 9 to generate a torque relative to the rotation axis of the swing arm 5. This torque interacts with the driving torque of the cam 3, forming a dynamic balance. By rationally designing the size of the eccentricity, the distribution of the cutting force on the swing arm 5 can be optimized, reducing the peak force on key components.

[0060] The technical solution of this application optimizes the distribution of the cutting force arm by setting the eccentricity, improves the force state of the cam rotation sawing mechanism, reduces vibration and deformation, ensures the stability of the cutting process, and thus improves the flatness of the cut end face.

[0061] In a specific illustrative embodiment, the linear guide 7 includes a guide rail and a slider 10.

[0062] The guide rail, as a fixed part of the linear guide rail 7, is fixedly mounted on the mounting surface of the sawing base 1 by bolts or other fasteners. During installation, it is necessary to ensure that the center line of the guide rail is strictly parallel to the extension direction of the swing arm 5 to ensure guiding accuracy.

[0063] The slider 10, as the moving part of the linear guide rail 7, is provided with a rolling connector that matches the guide rail, for example, a ball bearing. The slider 10 is fitted into the guide rail and forms rolling contact with the guide rail through the rolling connector, enabling smooth linear motion along the extension direction of the guide rail. The slider 10 is fixedly connected to a specific part of the swing arm 5 by bolts, so that the swing arm 5 and the slider 10 form a rigid whole.

[0064] The technical solution of this application ensures that the straightness error of the extension movement of the swing arm 5 is within the micrometer level through the precise cooperation between the guide rail and the slider 10, so that the saw blade 9 can accurately repeat the predetermined trajectory and ensure that the end face position is consistent each time it is cut.

[0065] In a specific illustrative embodiment, the drive unit 2 includes a servo motor and a reducer.

[0066] The servo motor is fixedly mounted on the side or top of the sawing stand 1 via a motor mount. The output shaft of the reducer is fixedly connected to the rotating shaft of the cam 3 via a coupling or key to ensure reliable power transmission and motion synchronization.

[0067] During the operation of the sawing mechanism, when the control system issues a sawing command, the servo motor receives the control signal and begins to operate. Under the action of electromagnetic force, the rotor of the servo motor overcomes static friction and begins to rotate, its speed gradually increasing according to a preset acceleration curve. The encoder inside the servo motor detects the rotor's position and speed in real time and sends feedback signals to the controller, forming a closed-loop control.

[0068] The rotational motion of the servo motor's output shaft is converted by a reducer: the reducer converts the servo motor's high-speed, low-torque output into a low-speed, high-torque output according to its reduction ratio. The reducer's output drives cam 3 to rotate; the angular velocity of cam 3 is inversely proportional to the angular velocity of the servo motor, while the torque is directly proportional.

[0069] Once the servo motor reaches the set speed, it enters a stable operating state. The servo motor continuously outputs stable rotational motion, which, after torque amplification by the reducer, drives cam 3 to rotate at a uniform speed. The rotation angle of cam 3 maintains a precise proportional relationship with the rotation angle of the servo motor, thereby achieving precise control of the cam position.

[0070] Driven by cam 3, the cam bearing 4 connected to it moves according to the cam profile curve, pushing the swing arm 5 to rotate and extend around the fixed shaft 6, thereby driving the saw blade 9 to rotate and cut the workpiece. Throughout the sawing process, the servo motor may adopt a variable speed operation mode according to the design requirements of the cam profile: appropriately decelerating during the saw blade 9's entry phase to reduce impact, maintaining a constant speed during the cutting phase to ensure cutting quality, and appropriately accelerating during the exit phase for rapid withdrawal. This variable speed motion is achieved through the precise speed control function of the servo motor, with the encoder providing real-time position feedback to ensure that the actual motion trajectory of cam 3 is consistent with the theoretical design.

[0071] After sawing is completed, the control system sends a stop or reverse command to the servo motor. The servo motor gradually reduces its speed according to the preset deceleration curve, and the reducer synchronously reduces its output speed, thus slowing down the rotation speed of cam 3. When saw blade 9 has completed cutting and retracted to its original position, the servo motor stops running, and cam 3 stops at the predetermined position, waiting for the next cutting command.

[0072] If the equipment needs to perform multiple cuts continuously, the servo motor can adopt a reciprocating motion mode: after completing one sawing operation, the servo motor rotates in the opposite direction at an appropriate angle, causing the cam 3 to drive the swing arm 5 to reset, and then rotates forward again to perform the next sawing operation. This reciprocating motion is achieved through precise position control of the servo motor, eliminating the need to wait for the motor to completely stop before starting the next action, thus improving work efficiency.

[0073] The technical solution of this application provides a precise, stable and flexible power input for the cam rotation sawing mechanism through the combination of servo motor and reducer, laying the power foundation for achieving high-quality, chip-free rotary cutting.

[0074] In a specific illustrative embodiment, such as Figure 4 As shown, the cam-rotating sawing mechanism also includes a dust collection hood 15, used to collect dust and debris generated during the sawing process and to protect the sawing area. The dust collection hood 15 is made of metal or high-strength engineering plastic, and its shape is designed as a semi-enclosed or fully enclosed structure to match the outline of the saw blade 9. The dust collection hood 15 is fixedly mounted on the sawing base 1 by a bracket or connector, or directly connected to other fixed parts of the sawing mechanism to ensure that its position remains fixed relative to the saw blade 9.

[0075] The dust hood 15 is placed over the outside of the saw blade 9. Its inner cavity forms a certain gap space with the outer periphery of the saw blade 9, which ensures that the saw blade can rotate freely without interference, and minimizes the opening to reduce dust overflow.

[0076] The technical solution of this application effectively solves the problems of dust pollution and safety protection during the sawing process through the physical isolation of the dust hood 15, providing an important guarantee for achieving efficient, clean and safe automated sawing operations.

[0077] A second aspect of the present disclosure provides a rotary sawing method, implemented based on the cam rotary sawing mechanism 12 disclosed in the first aspect of the present disclosure, such as... Figure 5 As shown, the method includes: S01: Start drive unit 2 to drive the cam rotation mechanism to rotate; Specifically, when the control system receives the sawing command, it starts the drive unit 2. The servo motor is powered on and its output shaft rotation is transmitted to the cam 3 via the reducer, driving the cam 3 to start rotating. The rotation angle of the cam 3 maintains a precise proportional relationship with the rotation angle of the servo motor, preparing for the subsequent driving of the swing arm 5.

[0078] S02: The cam rotation mechanism drives the swing arm 5 to rotate around the fixed shaft 6; Specifically, as the cam 3 continues to rotate, the cam bearing 4 moves along the cam profile curve, converting the rotational motion of the cam 3 into a driving force on the rocker arm 5. Due to the change in the lift of the cam 3 profile, the cam bearing 4 drives the rocker arm 5 to produce a compound motion: on the one hand, the rocker arm 5 rotates around the fixed axis 6; on the other hand, the rocker arm 5 tends to move along the extension direction.

[0079] At this point, under the constraint of the linear guide rail 7, the extension motion of the swing arm 5 is limited to a precise linear motion, while the rotational motion is unrestricted. Thus, the motion of the swing arm 5 is decomposed into two controllable components: a rotational component about the fixed axis 6 and a linear component along the guide rail direction, which together form the predetermined motion trajectory of the saw blade 9.

[0080] During the extension process, the profile curve of cam 3 determines the relationship between the rotation angle and extension amount of swing arm 5 at each moment. Through the optimized design of the profile of cam 3, the saw blade 9 can contact the material at the optimal angle and speed when cutting into the workpiece, avoiding impact. The linear guide 7 ensures that this complex movement is executed precisely, eliminating swaying or deflection that may be caused by movement backlash or uneven force.

[0081] As the cam 3 continues to rotate, the swing arm 5 extends, causing the saw blade 9 to gradually approach the workpiece. When the swing arm 5 extends to the predetermined position, the saw blade 9 enters the sawing area, ready to cut the workpiece.

[0082] S03: Driven by the swing arm 5, the saw blade 9 moves in the direction perpendicular to the synchronous belt conveyor 13 to transport the workpiece, and rotates to cut the workpiece. Specifically, the saw blade 9 enters the sawing position under the drive of the swing arm 5, while simultaneously rotating at high speed. At this time, the workpiece is continuously transported to the sawing area by the synchronous belt conveyor mechanism 13. Since at least a portion of the synchronous belt path forms a downwardly concave bend path 11, an open space is formed above the bend path 11. The rotational sawing trajectory of the saw blade 9 is located precisely within this open space, thus there is no spatial interference between the saw blade and the synchronous belt.

[0083] During the cutting phase of saw blade 9, the saw blade 9 gradually contacts the workpiece in a rotating manner. Due to the design of the cam 3 profile and the combined motion of the swing arm 5, the saw blade 9 cuts into the material with an optimized rake angle and a smooth speed. The cutting force is distributed along the circumference of the saw blade, avoiding the concentrated impact force generated by the entire saw blade cutting in a straight line. The key to this stage is to control the cutting speed and angle to prevent edge chipping due to stress concentration at the material edges.

[0084] During the cutting phase, the saw blade 9 fully enters the workpiece and moves along a predetermined trajectory under the drive of the swing arm 5 to complete the cut. During this process, the rotation axis of the saw blade 9 is parallel to and spaced apart from the rotation axis of the swing arm 5 around the fixed shaft 6, allowing different cutting points on the saw blade 9 to have different velocity vectors and directions, further dispersing the cutting force and reducing the load on individual saw teeth. Simultaneously, the linear guide rail 7 maintains precise guidance for the swing arm 5, ensuring that the saw blade 9 moves stably along the designed trajectory, unaffected by cutting reaction forces.

[0085] During the cutting stage, when the saw blade 9 is about to completely cut the workpiece, the contour of the cam 3 guides the saw blade 9 to gradually exit the material at an optimized angle and speed, so that the cutting force is smoothly reduced and the material is prevented from chipping or burrs due to stress release at the moment of cutting.

[0086] After the saw blade 9 finishes cutting the workpiece, the cam 3 continues to rotate and enters the return stroke stage. The descending section of the cam 3 profile causes the cam bearing 4 to be subjected to a reverse thrust, driving the swing arm 5 to rotate in the opposite direction around the fixed axis 6, while retracting to the initial position along the linear guide rail 7.

[0087] During the retraction process, the linear guide 7 also plays a precise guiding role, ensuring that the swing arm 5 slides smoothly in the opposite direction of the extension direction, and the saw blade 9 gradually exits the sawing area. The speed and trajectory of the swing arm 5 retraction are also controlled by the cam profile, and can be designed for rapid retraction to improve efficiency, or for smooth retraction to avoid vibration, as needed.

[0088] After the swing arm 5 retracts to its initial position, the slider 10 returns to the starting end of the guide rail, and the saw blade 9 is fully reset, awaiting the next cutting command. At this time, the drive unit 2 can stop operating or enter standby mode according to the command of the control system, preparing to execute the next sawing cycle.

[0089] If the equipment needs to perform multiple cuts consecutively, the above steps will be repeated periodically. In continuous working mode, the drive unit 2 can adopt reciprocating motion control: after completing one sawing, the servo motor rotates in the opposite direction at an appropriate angle to reset the cam-driven swing arm 5, and then rotates forward again to perform the next sawing, without having to stop completely, thereby improving work efficiency.

[0090] The above embodiments are only used to illustrate the technical solutions of this application and not to limit them; although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this application or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in this application.

Claims

1. A cam-driven rotary sawing mechanism, suitable for cutting workpieces on a synchronous belt conveyor, characterized in that, include: sawing stand (1); A drive unit (2) is disposed on the sawing seat (1); A cam rotation mechanism, connected to the drive unit (2), includes a cam (3); The sawing mechanism includes: The swing arm (5) is connected to the cam via a cam bearing (4). The first end of the swing arm (5) is rotatably mounted on the sawing seat (1) via a fixed shaft (6). The second end of the swing arm (5) is provided with a saw blade (9). The cam (3) rotates under the drive of the drive unit (2) and drives the swing arm (5) to rotate around the fixed shaft (6). The saw blade (9) moves along the direction perpendicular to the synchronous belt conveyor to transport the workpiece under the drive of the swing arm (5) and rotates to cut the workpiece.

2. The cam-rotary sawing mechanism according to claim 1, characterized in that, The sawing mechanism also includes a linear guide rail (7), which is disposed on the sawing seat (1) and connected to the swing arm (5) to form a track space along the extension direction of the swing arm (5). The swing arm (5) is located in the track space so that the linear guide rail (7) guides the extension movement of the swing arm (5).

3. The cam-rotating sawing mechanism according to claim 1, characterized in that, The synchronous belt moving conveyor includes a synchronous belt, at least a portion of the path of which forms an inverted "V" shaped bend (11), and a portion of the rotational sawing trajectory of the saw blade (9) is located within the open space formed by the bend (11).

4. The cam-rotating sawing mechanism according to claim 3, characterized in that, It also includes a sawing table, which is set in the open space formed by the bending path (11), and the saw blade (9) rotates and cuts the workpiece on the sawing table.

5. The cam-rotating sawing mechanism according to claim 1, characterized in that, The rotation axis of the saw blade (9) is parallel to and spaced apart from the rotation axis of the swing arm (5) around the fixed shaft (6).

6. The cam-rotating sawing mechanism according to claim 2, characterized in that, The linear guide (7) includes: The guide rail is provided on the sawing seat (1) along the extension direction of the swing arm (5); The slider (10) is slidably mounted on the guide rail and fixedly connected to the swing arm (5). The slider (10) moves linearly along the guide rail under the drive of the swing arm (5).

7. The cam-rotating sawing mechanism according to claim 1, characterized in that, The driving unit (2) includes: A servo motor is mounted on the sawing stand (1); The speed reducer has its input end connected to the output shaft of the servo motor and its output end connected to the cam (3).

8. The cam-rotating sawing mechanism according to claim 1, characterized in that, It also includes a dust hood, which is placed over the outside of the saw blade (9) to collect dust and debris generated during the sawing process and to protect the sawing area.

9. A rotary sawing method, applied to the cam rotary sawing mechanism according to any one of claims 1-8, characterized in that, include: Start the drive unit (2) to drive the cam rotation mechanism to rotate; The cam rotation mechanism drives the swing arm (5) to rotate around the fixed axis (6); The saw blade (9) moves along the direction perpendicular to the synchronous belt conveyor mechanism for transporting the workpiece under the drive of the swing arm (5), and rotates to cut the workpiece.

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