Regenerative tensioning system for cutting machines

Abstract

The invention relates to a tensioning system for band saws that improves the life and cutting performance of the saw by exposing the saw to less point pressure. The invention enables the saw to be tensioned by applying a force opposite to the direction of rotation of the pulley by means of a regenerative motor.

Description

[0001] REGENERATIVE TENSIONING SYSTEM FOR CUTTING MACHINES

[0002] Subject of Invention

[0003] The invention relates to a tensioning system for band saws , which improves cutting performance and reduces the stress experienced by the saw by reducing the tension of the saw at an unsupported point other than the main pulleys .

[0004] Prior Art

[0005] The main function of saw tensioning on band saws is to keep the saw blade running steadily and accurately during cutting . Tensioning minimizes oscillation and vibration of the saw, improving cutting accuracy and ensuring even blade contact with the workpiece . Furthermore , sufficient tension prevents the saw blade from deviating from the cutting line and allows for smooth, precise cutting results .

[0006] Tensioning band saw blades may lead to metal fatigue and changes in material properties over time . A blade tensioned with high point pressure at an unsupported point outside the main pulleys may develop microscopic cracks , especially when operated at high tensions , and these cracks may grow over time , causing the blade to snap or break . In addition, improper or excessive tensioning can compromise the structural integrity of the blade , leading to deformation, edge wear and tooth breakage . This not only shortens the life of the blade , but also negatively affects cutting accuracy and safety .

[0007] In the art , various documents address improvements in the tensioning of band saws on band saw machines . An example of the prior art is patent document US4269099A. The system described in the document provides a hydraulic mechanism for tensioning and releasing the band saw blade on horizontal band saw machines . In the system, hydraulic fluid directed to the piston of the hydraulic motor actuates the movement of the driven wheel toward and away from the drive wheel , thereby tensioning or releasing the saw blade . The rotary valve assembly controls the flow of the fluid, allowing the movement of the piston and can be manually operated by a lever mechanism.

[0008] Another example of the prior art is patent document EP0947274A2 . The invention of the said document relates to a mechanism for keeping the band saw under constant tension using by means of a counterweight and incorporating a vibration damper that reduces the effect of vibrations within the mechanism . The saw tensioning mechanism applies tension to the band saw by pushing the moving shaft upward or downward through a weight attached to one end of the balance arm and a push rod attached to the other end . The vibration damper maintains constant tension by preventing vibrations from the balance arm from transmitted to the weight and thus to the saw .

[0009] A review of the prior art shows that these systems apply high point pressure to the weaker regions of the saws during tensioning operations and are inefficient in terms of energy consumption .

[0010] In order to overcome the disadvantages mentioned above , a regenerative tensioning mechanism has been developed that reduces the point stress in the saw and uses energy more efficiently . Detailed Description of the Invention

[0011] The invention comprises a system and apparatus for improving the performance of band saws in cutting machines . The regeneration motor ( 8 ) is designed to allow at least one saw band ( 2 ) to operate under tension between two saw pulleys ( 1 ) during cutting, without applying high localized pressure to any point of the saw . This mechanism not only increases the cutting precision and service life of the saw, but also provides energy recovery .

[0012] An obj ect of the invention is to optimize the stress and tension on the saw to ensure precision and durability, improving cutting performance in band saws .

[0013] A further obj ect of the invention is to improve the energy efficiency of cutting machines by optimizing energy recovery and consumption .

[0014] A further obj ect of the invention is to provide innovative solutions to technical problems for reducing production costs and create a more efficient , sustainable structure in industrial cutting processes .

[0015] The system comprises at least one saw band ( 2 ) running between at least two saw pulleys , bearing on the outer peripheral surfaces of the pulleys . This band ( 2 ) is acted upon by a drive mechanism and a regeneration mechanism. The drive mechanism enables the forward movement of the band ( 2 ) , allowing the cutting action by the band saw . The regeneration mechanism on the opposite side applies force in the opposite direction and at a lower magnitude to the saw pulley ( 1 ) it is connected to , creating the necessary tension in the cutting section of the band ( 2 ) . This structure ensures that the band (2) operates at the desired speed and tension, increasing stability and accuracy during cutting.

[0016] The drive motor (7) in the drive mechanism transmits power to the motor pulley (5) , rotating the saw pulley. The rotational force obtained from the motor pulley (5) is transferred to the saw pulley (1) via the drive V-belt (9) . This enables the saw pulley (1) to rotate, allowing the band (2) to move continuously and steadily.

[0017] The regeneration mechanism controls the tension of the band (2) in the system while providing energy recovery. The drive pulley (1) , to which the drive mechanism is connected, enables the forward movement of the saw band, while the kinetic energy obtained from the counter pulley (1) is first transmitted to the shaft (3) and then to the shaft pulley (6) . Energy is transferred from the shaft pulley (6) to the motor pulley (5) via the regeneration V-belt (10) and from there to the regeneration motor (8) . The regeneration motor (8) converts this kinetic energy into electrical energy, thereby braking the system and enabling energy recovery. As a result, the regeneration mechanism creates a force effect in the opposite direction of the belt's movement, causing the saw to stretch, while also enabling energy recovery from the system to which it is connected. The energy recovered during this process can be reused in the system or utilized for other energy needs.

[0018] The invention is a system that provides tensioning for cutting machines comprising the following, at least one saw band (2) located between at least two saw pulleys (1) and moving by wrapping around the pulleys (1) , a drive mechanism connected to one of the saw pulleys (1) , which enables the system's forward motion by rotating this pulley ( 1 ) , a regeneration mechanism that creates the necessary tension in the saw band (2) at the cutting point by applying force in the opposite direction and to a lesser extent than the direction of movement of the pulley (1) opposite the pulley (1) connected to the drive mechanism.

[0019] Regeneration mechanism in one embodiment of the invention comprises the following;

[0020] - a shaft (3) which receives kinetic energy from the saw pulley (1) and transmits it to the shaft pulley (6) ,

[0021] - a regeneration V-belt (10) that transfers the rotational force of the shaft pulley (6) to the motor pulley (5) ,

[0022] - a regeneration motor (8) that takes kinetic energy from the motor pulley (5) , converts it into electrical energy and applies a certain amount of braking torque,

[0023] In one embodiment of the invention, the drive mechanism comprises a drive V-belt (9) which rotates the pulley using power from the drive motor (7) .

[0024] In one embodiment of the invention, the system comprises a chassis (4) carrying the saw pulleys (1) .

[0025] In one embodiment of the invention, the system comprises an electrical cabinet (12) connected to the drive (7) and regeneration motors (8) by an electrical cable (11) , which recycles the energy released as a result of the activity of the regeneration mechanism and ensures energy flow in the system.

[0026] Single or multiple band sawing machines employing the said tensioning and drive system fall within the scope of protection of the invention. One advantage of the inventive system is that , by optimizing the tensioning , it reduces the wear and tear of the band saws and thus extends their service time . This is achieved by reducing the need to apply tension on unsupported spans other than the main pulleys .

[0027] Another advantage of the inventive system is that it enables the use of thinner band saws by reducing the peak localized pressure acting on the exposed regions of the saw .

[0028] Another advantage of the regenerative tensioning system of the invention is that it enables energy recovery through the use of a regenerative motor and reduces total energy consumption .

[0029] Description of the Figures

[0030] Fig . 1 : A front view of the system

[0031] Fig . 2 : A top-front diagonal view of the system

[0032] Fig . 3 : A top-rear diagonal view of the system ion of Reference Numbers in s

[0033] 1 . Saw pulley

[0034] 2 . Saw band

[0035] 3 . Shaft

[0036] 4 . Chassis

[0037] 5 . Motor pulley

[0038] 6 . Shaft pulley

[0039] 7 . Drive motor

[0040] 8 . Regeneration motor

[0041] 9 . Drive V belt

[0042] 10 . Regeneration V belt

[0043] 11 . Electrical cable

[0044] 12 . Electrical cabinet

Claims

CLAIMS1. A tensioning mechanism for sawing machines, wherein said mechanism comprises the following;- at least one saw band (2) located between at least two saw pulleys (1) and moving by wrapping around the pulleys ( 1 ) ,- a drive mechanism connected to one of the saw pulleys (1) which provides the system with forward motion by rotating the pulley (1) to which it is connected,- a regeneration mechanism connected to the pulley (1) opposite the pulley to which the drive mechanism is connected, applying thereto a lower-magnitude force in the opposite direction relative to the opposing pulley (1) , thereby creating tension in the saw band (2) .

2. A mechanism according to claim 1, wherein regeneration mechanism comprises the following;- a shaft (3) that receives kinetic energy from the saw pulley (1) and transmits it to the shaft pulley (6) ,- a regeneration V-belt (10) that transmits the rotational force of the shaft pulley (6) to the motor pulley (5) ,- a regeneration motor (8) that converts kinetic energy from the motor pulley (5) into electrical energy and applies a certain amount of braking torque.

3. A mechanism according to claim 1, wherein the drive mechanism comprises a drive V-belt (9) that rotates the pulley using power obtained from the drive motor (7) .

4. A mechanism according to claim 1, wherein said mechanism includes a chassis (4) that carries the saw pulleys.

5. A mechanism according to claim 1, wherein said mechanism includes an electrical cabinet (12) connected by an electrical cable (11) to the drive (7) and regeneration motors (8) , which provide the energy flow in the system.

6. The use of the tensioning mechanism according to any of the preceding claims in single or multi-band cutting machines.

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