Numerical control sawing machine for rubber roller iron core machining

Abstract

The invention relates to the technical field of rubber roller production, in particular to a numerical control sawing machine for rubber roller iron core machining, which comprises a chassis and a first support, the first support is mounted on the upper surface of the chassis, a cutting mechanism is mounted at the left end of the upper surface of the chassis and cuts bars, and a platform is mounted at the top end of the first support. The platform supports bars, the conveying mechanism is installed on the upper surface of the platform and conveys the bars to the cutting mechanism, and the positioning mechanism is installed at the left end of the conveying mechanism and fixes the bars in a fixed-length mode. The gap between the clamping plates is flexibly adjusted, a plurality of bars with different outer diameters can be stably clamped, the bars do not need to be machined one by one, the batch cutting efficiency of rubber roller iron cores is greatly improved, and the problems that a traditional sawing machine is poor in adaptability and low in machining efficiency are effectively solved. Automatic fixed-length cutting is achieved, the consistency of the length of the iron core and the cutting precision are improved, the subsequent secondary cutting treatment link is omitted, and the labor intensity of workers is remarkably reduced.

Description

Technical Field

[0001] This invention relates to the field of rubber roller manufacturing technology, and in particular to a CNC sawing machine for machining rubber roller cores. Background Technology

[0002] Rubber rollers are roll-shaped products made by vulcanizing rubber with a metal or other material core. Their core structure consists of an outer rubber layer, a hard rubber layer, a metal core, a roller neck, and ventilation holes. The complete manufacturing process encompasses key steps such as roller core sandblasting, bonding treatment, and high-pressure vulcanization. Depending on the application, rubber rollers can be categorized into various types, such as papermaking rollers, dyeing and printing rollers, and printing rollers. Classified by material, they include different categories such as butyl rubber rollers, nitrile rubber rollers, and polyurethane rubber rollers, and are widely used in multiple industrial fields.

[0003] In the mass production of rubber rollers, the cutting of the metal core needs to be completed using a CNC saw. However, existing traditional CNC saws have significant technical defects in practical applications. On the one hand, the clamps of traditional saws are designed to accommodate the cutting needs of bars with different outer diameters, and can only clamp and fix a single bar. This results in only one bar being cut at a time, which not only leads to poor equipment adaptability but also severely restricts the cutting efficiency of mass production of rubber rollers. On the other hand, since rubber rollers for different purposes correspond to different length specifications, the existing bar conveying method is too simple and lacks a precise automatic length setting function. This results in poor consistency in the length of the cut iron core, and some products need to undergo secondary cutting to meet production requirements. This increases the number of processing steps and significantly increases the labor intensity of workers. Summary of the Invention

[0004] In order to overcome the shortcomings of low cutting efficiency and inability to cut to a fixed length in the prior art, the present invention provides a CNC sawing machine for processing rubber roller cores.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a CNC sawing machine for processing rubber roller cores, comprising a chassis and a first support, the first support being mounted on the upper surface of the chassis, a cutting mechanism being mounted on the left end of the upper surface of the chassis, the cutting mechanism cutting bar stock, a platform being mounted on the top of the first support, the platform providing support for the bar stock, a conveying mechanism being mounted on the upper surface of the platform, the conveying mechanism conveying bar stock to the cutting mechanism, a positioning mechanism being mounted on the left end of the conveying mechanism to fix the bar stock to a fixed length, and a controller being mounted on the front end of the lower surface of the platform, and the controller being electrically connected to the cutting mechanism, the conveying mechanism and the positioning mechanism.

[0006] Preferably, the cutting mechanism includes a second bracket installed on the left end of the upper surface of the chassis. An electric slide table electrically connected to the controller is installed on the top of the second bracket. A cutting machine electrically connected to the controller is installed on the moving end of the electric slide table. The electric slide table is used to drive the cutting machine to move back and forth, so that the cutting machine can cut the bar material.

[0007] Preferably, the conveying mechanism includes two guide rails installed at the front and rear ends of the upper surface of the platform. A linear slider is slidably connected to the outer wall of the guide rail. The linear slider is connected to a solenoid valve through an air pipe. The controller controls the opening and closing of the solenoid valve. The linear slider is driven by air pressure to move left and right on the guide rail. A push plate is installed on the inner side of the linear slider. The push plate pushes the bar material to move from right to left. The linear slider drives the push plate to move, thereby realizing the cutting and feeding of the bar material.

[0008] Preferably, the positioning mechanism includes a support plate, a guard plate is installed on the top of the right side wall of the support plate, the right side wall of the guard plate is installed with the left end of the platform, a moving component is installed on the inner side of the guard plate, an adjusting component is installed on the lower surface of the support plate, the adjusting component controls the moving component to clamp bars of different outer diameters, and a length fixing component is installed on the top of the left side wall of the support plate, the length fixing component measures the cutting length of the bars.

[0009] Preferably, the moving component includes two guide rods installed on the inner side of the guard plate. Several moving rods are equidistantly sleeved on the outer wall of the guide rods from front to back. A clamping plate is installed on the upper surface of the moving rod, which clamps the bar stock. A pin is installed at the bottom end of the right side wall of the moving rod.

[0010] Preferably, the distance adjustment assembly includes two hydraulic cylinders installed at the front and rear ends of the lower surface of the support plate. The hydraulic cylinders are electrically connected to the controller. A guide plate is installed at the output end of the hydraulic cylinder. The hydraulic cylinder is used to change the height of the guide plate. The outer wall of the guide plate has multiple sets of symmetrical guide grooves. Pins are inserted into the inner cavity of the guide grooves. By cooperating with the guide grooves and pins, the distance between the clamping plates is changed, and multiple bars of different outer diameters are clamped and positioned, thereby realizing the simultaneous cutting of multiple bars and improving cutting efficiency.

[0011] Preferably, the inclination of the several guide grooves arranged from the inside out gradually increases.

[0012] Preferably, the length-fixing component includes a limiting rod installed on the top of the left side wall of the support plate, a length recognition unit sleeved on the outer wall of the limiting rod, and two connecting rods installed on the right side wall of the length recognition unit via pins. The top of the connecting rods is connected to the left end of the two middle clamping plates via pins. As the bar moves, the distance the bar moves is automatically measured, and automatic length fixing is performed.

[0013] Preferably, the length recognition unit includes a slide block sleeved on the outer wall of the limiting rod. The right side wall of the slide block has a dovetail-shaped slide rail. A centering slider is slidably connected to the inner cavity of the slide rail. The centering slider is connected to the connecting rod by a pin. A lifting block and a spring are inserted into the inner cavity of the slide block from top to bottom. A boss is provided on the outer wall of the lifting block to prevent the lifting block from popping out under the action of the spring force. A speed sensor and a roller are respectively installed at the front and rear ends of the inner side of the lifting block. The speed sensor is electrically connected to the controller and calculates the number of rotations of the roller.

[0014] Preferably, the roller is located at the center between two adjacent clamping plates.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention uses a hydraulic cylinder to drive the guide plate to rise and fall, and utilizes the cooperation of the guide groove and the pin to drive the moving rod to slide along the guide rod, so as to realize the flexible adjustment of the clamping plate spacing. It can stably clamp multiple bars of different outer diameters without processing them one by one, which greatly improves the batch cutting efficiency of the rubber roller core and effectively solves the problems of poor adaptability and low processing efficiency of traditional sawing machines.

[0016] 2. When the clamping plate moves, the linkage adjusts the position of the slide block so that the roller is always tangent to the bar. Under the action of the spring force, the roller rolls stably with the bar. The speed sensor records the number of rotations of the roller and calculates the distance the bar moves by combining the roller circumference, thus realizing automatic fixed-length cutting. This not only improves the consistency of the core length and the cutting accuracy, but also eliminates the need for subsequent secondary cutting processing, significantly reducing the labor intensity of the workers. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a perspective view of the cutting mechanism of the present invention; Figure 3 For the present invention Figure 1 Enlarged view of point A in the middle; Figure 4 This is a perspective view of the positioning mechanism of the present invention; Figure 5 This is a perspective view of the moving component of the present invention; Figure 6 This is a perspective view of the adjustable distance component of the present invention; Figure 7 This is a perspective view of the fixed-length component of the present invention; Figure 8 This is an exploded view of the length recognition unit of the present invention.

[0018] In the diagram: 1. Chassis; 2. First support; 3. Cutting mechanism; 4. Platform; 5. Conveying mechanism; 6. Positioning mechanism; 7. Controller; 31. Second support; 32. Electric slide table; 33. Cutting machine; 51. Guide rail; 52. Linear slider; 53. Push plate; 61. Support plate; 62. Guard plate; 63. Moving component; 64. Adjusting distance component; 65. Length fixing component; 631. Guide rod; 632. Moving rod; 633. Clamping plate; 634. Pin; 641. Hydraulic cylinder; 642. Guide plate; 643. Guide groove; 651. Limiting rod; 652. Length recognition unit; 653. Connecting rod; 6521. Slide seat; 6522. Slide rail; 6523. Centering slider; 6524. Lifting block; 6525. Spring; 6526. Speed ​​sensor; 6527. Roller. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This invention provides a technical solution: a CNC saw for machining rubber roller cores, such as... Figures 1-8 As shown, the device includes a chassis 1 and a first support 2. The first support 2 is mounted on the upper surface of the chassis 1. A cutting mechanism 3 is mounted on the left end of the upper surface of the chassis 1. The cutting mechanism 3 cuts the bar stock. A platform 4 is mounted on the top of the first support 2. The platform 4 provides support for the bar stock. A conveying mechanism 5 is mounted on the upper surface of the platform 4. The conveying mechanism 5 conveys the bar stock to the cutting mechanism 3. A positioning mechanism 6 is mounted on the left end of the conveying mechanism 5 to fix the bar stock to a fixed length. A controller 7 is mounted on the front end of the lower surface of the platform 4. The controller 7 is electrically connected to the cutting mechanism 3, the conveying mechanism 5 and the positioning mechanism 6.

[0021] As a preferred embodiment, the cutting mechanism 3 further includes a second bracket 31 installed on the left end of the upper surface of the chassis 1. An electric slide 32 electrically connected to the controller 7 is installed on the top of the second bracket 31. A cutting machine 33 electrically connected to the controller 7 is installed on the moving end of the electric slide 32. The electric slide 32 is used to drive the cutting machine 33 to move back and forth, so that the cutting machine 33 can cut the bar material. The cutting machine 33 is tangent to the platform 4 to ensure that the cut of the bar material is flat.

[0022] As a preferred embodiment, the conveying mechanism 5 further includes two guide rails 51 installed at the front and rear ends of the upper surface of the platform 4. A linear slider 52 is slidably connected to the outer wall of the guide rails 51. The linear slider 52 is connected to a solenoid valve through an air pipe. The controller 7 controls the opening and closing of the solenoid valve. The linear slider 52 is driven by air pressure to move left and right on the guide rails 51. A push plate 53 is installed on the inner side of the linear slider 52. The push plate 53 pushes the bar material to move from right to left.

[0023] As a preferred embodiment, the positioning mechanism 6 further includes a support plate 61, a guard plate 62 installed on the top of the right side wall of the support plate 61, the right side wall of the guard plate 62 being installed with the left end of the platform 4, a moving component 63 installed on the inner side of the guard plate 62, an adjusting component 64 installed on the lower surface of the support plate 61, the adjusting component 64 controlling the moving component 63 to clamp bars of different outer diameters, and a length fixing component 65 installed on the top of the left side wall of the support plate 61, the length fixing component 65 measuring the cutting length of the bars.

[0024] As a preferred embodiment, the moving assembly 63 further includes two guide rods 631 installed inside the guard plate 62. Several moving rods 632 are equidistantly sleeved on the outer wall of the guide rods 631 from front to back. The guide rods 631 are horizontally set to ensure that the moving rods 632 move horizontally. A clamping plate 633 is installed on the upper surface of the moving rod 632, which clamps the bar stock. A pin 634 is installed at the bottom of the right side wall of the moving rod 632. The pin 634 is cylindrical and can slide smoothly on the guide groove 643 by utilizing its own curved surface.

[0025] As a preferred embodiment, the adjustable distance assembly 64 further includes two hydraulic cylinders 641 installed at the front and rear ends of the lower surface of the support plate 61. The hydraulic cylinders 641 are electrically connected to the controller 7. A guide plate 642 is installed at the output end of the hydraulic cylinders 641. The hydraulic cylinders 641 are used to change the height of the guide plate 642. The outer wall of the guide plate 642 has multiple sets of symmetrical guide grooves 643. Pins 634 are inserted into the inner cavity of the guide grooves 643. The inclination of the several guide grooves 643 arranged from the inside to the outside gradually increases. The inclination of the guide grooves 643 is used to adjust the movement and feed of the clamping plate 633 to ensure that the clamping plate 633 moves at equal distances.

[0026] Spacing adjustment trigger: According to the outer diameter specifications of the bar to be processed, the operator inputs the corresponding parameters through the controller 7, and the controller 7 sends the extension and retraction command to the hydraulic cylinder 641 of the spacing adjustment component 64; After receiving a command, the hydraulic cylinder 641 starts, and its output end extends or retracts, driving the guide plate 642 to move vertically upward or downward. When the guide plate 642 rises or falls, the guide groove 643 on its outer wall slides against the pin 634 through the inner wall, generating a horizontal pushing or pulling force on the pin 634. Since the pin 634 is fixed to the moving rod 632, and the moving rod 632 is horizontally limited by the guide rod 631, the moving rod 632 will slide synchronously along the axial direction (front and back direction) of the guide rod 631, thereby driving the top clamping plate 633 to move closer or further away. When the guide plate 642 moves upward, the inclined surface of the guide groove 643 pushes the pin 634 to slide outward, and the spacing of the clamping plates 633 increases, which is suitable for bars with larger outer diameters. When the guide plate 642 moves downward, the inclined surface of the guide groove 643 pulls the pin 634 to slide inward, the spacing of the clamping plates 633 decreases, and it is suitable for bars with smaller outer diameters. As the inclination of the guide groove 643 gradually increases from the inside to the outside, the horizontal displacement of each set of pins 634 changes in an equidistant gradient, ensuring that the spacing between all adjacent clamping plates 633 is always consistent, thus avoiding clamping offset. Once the spacing of the clamping plates 633 is adjusted to match the outer diameter of the bar stock to be processed, the controller 7 controls the hydraulic cylinder 641 to stop operating, the guide plate 642 maintains its current height, the pin 634 is positioned in the guide groove 643, and the clamping plates 633 fit tightly against the outer wall of the bar stock through the arc-shaped clamping surface, thereby achieving synchronous and stable clamping of multiple bars stock and providing reliable positioning for subsequent conveying and cutting.

[0027] As a preferred embodiment, the length-fixing component 65 further includes a limiting rod 651 installed on the top of the left side wall of the support plate 61. The outer wall of the limiting rod 651 is rectangular to prevent the length recognition unit 652 from rotating. The length recognition unit 652 is sleeved on the outer wall of the limiting rod 651. Two connecting rods 653 are installed on the right side wall of the length recognition unit 652 via pins. The top of the connecting rods 653 is connected to the left end of the two clamping plates 633 in the middle via pins. The connection point of the two connecting rods 653 is always at the center position between the two clamping plates 633. When the clamping plates 633 limit the bar stock, the length recognition unit 652 is positioned at the cutting point of the bar stock.

[0028] As a preferred embodiment, the length recognition unit 652 further includes a slide block 6521 sleeved on the outer wall of the limiting rod 651. The right side wall of the slide block 6521 has a dovetail-shaped slide rail 6522. A centering slider 6523 is slidably connected to the inner cavity of the slide rail 6522. The centering slider 6523 is connected to the connecting rod 653 via a pin. The centering slider 6523 provides the connecting rod 653 with room to move. A lifting block 6524 and a spring 6525 are sequentially inserted into the inner cavity of the slide block 6521 from top to bottom. The outer wall of the lifting block 6524 has a boss to prevent the lifting block from rising under the elastic force of the spring 6525. The lowering block 6524 pops out. A speed sensor 6526 and a roller 6527 are respectively installed at the front and rear ends of the inner side of the lifting block 6524. The speed sensor 6526 is electrically connected to the controller 7. The spring force of the spring 6525 keeps the roller 6527 in contact with the bar stock. The speed sensor 6526 calculates the number of rotations of the roller 6527. The product of the number of rotations and the length of the roller 6527 is the distance the bar stock moves. The roller 6527 is located at the center between two adjacent clamping plates 633, so that the roller 6527 contacts the cutting point of the bar stock, ensuring the rolling stability of the roller 6527 and improving the measurement accuracy.

[0029] When the pitch adjustment component 64 drives the clamping plate 633 to adjust the pitch according to the outer diameter of the bar, the two middle clamping plates 633 will drive the centering slider 6523 to slide along the dovetail slide 6522 of the slide block 6521 through the connecting rod 653, and at the same time drive the slide block 6521 to move left and right along the limit rod 651, so that the roller 6527 is always aligned with the tangent point of the bar axis, and the position calibration is completed. When the conveying mechanism 5 pushes the bar to the left, the outer wall of the bar will drive the roller 6527 to rotate synchronously. Since the roller 6527 is in close contact with the bar, the number of rotations of the roller 6527 is directly proportional to the conveying distance of the bar. The speed sensor 6526 detects the number of rotations of the roller 6527 in real time and converts the detection data into an electrical signal and transmits it to the controller 7. The controller 7 calculates the actual conveying distance of the bar in real time according to the preset circumference of the roller 6527 and the calculation formula "conveying distance = number of rotations × roller circumference". When the calculated conveying distance reaches the preset core cutting length, the controller 7 immediately sends a stop signal to the conveying mechanism 5, and at the same time controls the adjusting component 64 to drive the clamping plate 633 to further clamp the bar material, complete the automatic length positioning, and then controls the cutting mechanism 3 to start the cutting operation.

[0030] Working principle: Step 1: The bar stock is placed on the platform 4, the linear slider 52 moves to the left along the guide rail 51, and the push plate 53 conveys the bar stock to the cutting mechanism 3. Step 2: The guide plate 642 is raised and lowered by the hydraulic cylinder 641. The guide groove 643 is inclined outward or inward to press the pin 634, so that the moving rod 632 slides outward or inward along the outer wall of the guide rod 631. Due to the different inclination of the guide groove 643, the distance between the clamping plates 633 increases or decreases at equal intervals. The clamping plates 633 are used to position and clamp multiple bars. Step 3: When the distance between the clamping plates 633 changes, the angle between the two connecting rods 653 also changes as the clamping plates 633 move. While the centering slider 6523 moves along the slide rail 6522, the slide block 6521 slides along the limit rod 651 to ensure that the slide block 6521 is always at the center of the two clamping plates 633. Under the push of the spring 6525, the roller 6527 contacts the tangential point of the bar. As the bar moves, the roller 6527 rolls. The speed sensor 6526 calculates the number of rotations of the roller 6527. The product of the number of rotations of the roller 6527 and the circumference of the roller 6527 is the distance the bar moves. When the moving distance reaches the cutting length of the bar, the controller 7 stops the linear slider 52. The hydraulic cylinder 641 drives the guide plate 642 to move downward. With the cooperation of the guide groove 643 and the pin 634, the clamping plates 633 move closer to each other to position the bar and realize the automatic length setting of the bar. Step four: The electric slide table 32 drives the cutting machine 33 to move back and forth, and the cutting machine 33 completes the cutting of the bar stock. Multiple bars are cut at once, improving cutting efficiency.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A CNC sawing machine for machining rubber roller cores, comprising a chassis (1) and a first support (2), the first support (2) being mounted on the upper surface of the chassis (1), characterized in that, A cutting mechanism (3) is installed on the left end of the upper surface of the chassis (1). The cutting mechanism (3) cuts the bar stock. A platform (4) is installed on the top of the first bracket (2). The platform (4) provides support for the bar stock. A conveying mechanism (5) is installed on the upper surface of the platform (4). The conveying mechanism (5) conveys the bar stock to the cutting mechanism (3). A positioning mechanism (6) is installed on the left end of the conveying mechanism (5) to fix the bar stock to a fixed length. A controller (7) is installed on the front end of the lower surface of the platform (4). The controller (7) is electrically connected to the cutting mechanism (3), the conveying mechanism (5), and the positioning mechanism (6). The positioning mechanism (6) includes a support plate (61), a guard plate (62) is installed on the top of the right side wall of the support plate (61), the right side wall of the guard plate (62) is installed with the left end of the platform (4), a moving component (63) is installed on the inner side of the guard plate (62), an adjusting component (64) is installed on the lower surface of the support plate (61), the adjusting component (64) controls the moving component (63) to clamp bars of different outer diameters, and a length fixing component (65) is installed on the top of the left side wall of the support plate (61), the length fixing component (65) measures the cutting length of the bar.

2. A CNC sawing machine for machining rubber roller cores according to claim 1, characterized in that, The cutting mechanism (3) includes a second bracket (31) installed on the left end of the upper surface of the chassis (1). The top of the second bracket (31) is equipped with an electric slide (32) electrically connected to the controller (7). The moving end of the electric slide (32) is equipped with a cutting machine (33) electrically connected to the controller (7). The electric slide (32) is used to drive the cutting machine (33) to move back and forth, so that the cutting machine (33) can cut the bar material.

3. A CNC sawing machine for machining rubber roller cores according to claim 2, characterized in that, The conveying mechanism (5) includes two guide rails (51) installed at the front and rear ends of the upper surface of the platform (4). A linear slider (52) is slidably connected to the outer wall of the guide rail (51). The linear slider (52) is connected to a solenoid valve through an air pipe. The controller (7) controls the opening and closing of the solenoid valve. The linear slider (52) is driven by air pressure to move left and right on the guide rail (51). A push plate (53) is installed on the inner side of the linear slider (52). The push plate (53) pushes the bar material to move from right to left.

4. A CNC sawing machine for machining rubber roller cores according to claim 3, characterized in that, The moving component (63) includes two guide rods (631) installed inside the guard plate (62). Several moving rods (632) are equidistantly sleeved on the outer wall of the guide rods (631) from front to back. A clamping plate (633) is installed on the upper surface of the moving rod (632). The clamping plate (633) clamps the bar stock. A pin (634) is installed at the bottom right side wall of the moving rod (632).

5. A CNC sawing machine for machining rubber roller cores according to claim 4, characterized in that, The adjustable distance assembly (64) includes two hydraulic cylinders (641) installed at the front and rear ends of the lower surface of the support plate (61). The hydraulic cylinders (641) are electrically connected to the controller (7). A guide plate (642) is installed at the output end of the hydraulic cylinder (641). The hydraulic cylinder (641) is used to change the height of the guide plate (642). The outer wall of the guide plate (642) is provided with multiple sets of symmetrical guide grooves (643). A pin (634) is inserted into the inner cavity of the guide groove (643).

6. A CNC sawing machine for machining rubber roller cores according to claim 5, characterized in that, The inclination of the several guide grooves (643) arranged from the inside out gradually increases.

7. A CNC sawing machine for machining rubber roller cores according to claim 6, characterized in that, The length-fixing component (65) includes a limiting rod (651) installed on the top of the left side wall of the support plate (61). A length recognition unit (652) is sleeved on the outer wall of the limiting rod (651). Two connecting rods (653) are installed on the right side wall of the length recognition unit (652) by means of a pin. The top of the connecting rod (653) is connected to the left end of the two middle clamping plates (633) by means of a pin.

8. A CNC sawing machine for machining rubber roller cores according to claim 7, characterized in that, The length recognition unit (652) includes a slide block (6521) sleeved on the outer wall of the limiting rod (651). The right side wall of the slide block (6521) has a dovetail-shaped slide rail (6522). A centering slider (6523) is slidably connected to the inner cavity of the slide rail (6522). The centering slider (6523) is connected to the connecting rod (653) by a pin. Lifting blocks (6524) are inserted into the inner cavity of the slide block (6521) from top to bottom. The lifting block (6524) is provided with a spring (6525) and a boss on the outer wall to prevent the lifting block (6524) from popping out under the elastic force of the spring (6525). The lifting block (6524) is equipped with a speed sensor (6526) and a roller (6527) at the front and rear ends of the inner side. The speed sensor (6526) is electrically connected to the controller (7) and the speed sensor (6526) calculates the number of rotations of the roller (6527).

9. A CNC sawing machine for machining rubber roller cores according to claim 8, characterized in that, The roller (6527) is located at the center between two adjacent clamps (633).

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