Vacuum drive mechanism for band saw cutting machines

Abstract

The invention relates to a drive mechanism for cutting machines to improve the cutting performance of saws. In the present invention, a vacuum is created between the saw and the pulley by means of air ducts opened on the belts on the drive pulley of the band saw. Thus, the invention allows the saw to be driven with less tension by increasing the friction force via vacuum, in the area where the saws are mounted while moving on the main pulley.

Description

[0001] DESCRIPTION

[0002] VACUUM DRIVE MECHANISM FOR BAND SAW CUTTING MACHINES

[0003] Subject of the Invention

[0004] The invention relates to a vacuum drive mechanism to improve the cutting performance of band saws . In particular, the invention aims to provide a more efficient and long-lasting cutting process by reducing the stresses acting on saws . This mechanism offers economic and functional advantages by optimizing the performance of cutting machines while minimizing wear and tear .

[0005] Prior Art

[0006] Drive systems of band saws rely on harmony between pulleys and band blades , and accurate functioning of these components directly affects the cutting performance . The band blade is held firmly on pulleys and executes the cutting operation by rotating in a continuous loop . The drive system transfers motor power to the blade through pulleys , while the diameter and rotation speed of the pulleys determine the cutting speed of the blade . The stable operation of this system, together with the correct alignment of the blade and its movement with optimum tension enhances the cutting quality while minimizing vibrations , thereby improving the efficiency of the machine .

[0007] Frictional forces between pulleys and band saw blades play a critical role for the efficient operation of the system . The surfaces of pulleys are usually equipped with a rubberized coating , which increases the frictional force between the band and the pulley, preventing the blade from slipping . This frictional force provides sufficient grip between the blade and the pulleys during rotation, and ensures that the movement of the blade is transferred in accordance with the rotational speed of the motor . If the friction force is insufficient , the blade may slip , and the cut will not be accurate . At the same time , friction is also important for the blade to rotate steadily around the pulleys and follow a specific traj ectory . This mechanism allows the blade to perform precise and efficient cutting by maintaining continuous circular motion .

[0008] Various prior art documents disclose developments related to band saw drive mechanisms .

[0009] An example of the prior art is patent document JP2006057731 . The invention relates to a wire saw cutting device for cutting stone or concrete structures , and to a drive pulley which rotates the wire saw as a part of this device . The drive pulley comprises a recess located on its outer periphery and an elastic body inserted in the recess . The elastic body has a surface designed with recesses and protrusions to prevent slipping by increasing the frictional force of the beads and coating elements of the wire saw . The elastic body is made of thermosetting rubber or resin . The protrusions range in size from 3 to 10 mm and are positioned so as to correspond to the bead spacing of the wire saw . This design aims to prevent slippage between the drive pulley and the wire saw, allowing the wire saw to rotate at the appropriate speed and to prevent abnormal wear of the abrasive layer and coating elements , thus prolonging the life of the device .

[0010] Another example of the prior art is patent document US2737213A. The invention relates to a motorized, portable , belt-driven hand saw . The high-speed series motor rotates the saw blade via a V-belt or gear belt mechanism . The motor and saw spindle are placed in parallel and the belt tension is controlled by a spring-assisted adj ustment mechanism with eccentric slots . A hinged base allows depth and angle adj ustment of the saw blade , while the center of gravity is positioned in line with the handle for easy handling . The belt drive mechanism ensures high torque transmission under load with less noise and wear compared to geared systems . The gear belt aims to provide smooth running performance at high speeds by preventing slippage .

[0011] The prior art shows that there is no system that utilizes the vacuum effect to generate a large diameter drive force to avoid applying high point pressure during the drive of band saws .

[0012] Unlike the examples in the known prior art , a vacuum drive mechanism has been developed which utilizes a vacuum system to generate a driving effect on the band, allowing the saw to operate with reduced blade tension .

[0013] Detailed Description of the Invention

[0014] The invention relates to a drive mechanism for band saw cutting machines , which is designed to improve the cutting performance of the saws and to reduce the stress to which they are subj ected during operation .

[0015] One obj ect of the invention is to increase the cutting capacity by reducing the vertical and high point pressure applied to the weak planes of the saws .

[0016] Another obj ect of the invention is to improve the performance of the machine by solving tensioning optimization challenges caused by differences in tensioning methods and pulley systems . The invention relates to a vacuum drive mechanism for band saws , and includes any vacuum mechanism for band saws , which creates a vacuum in the region where the saw is seated on the pulley, thereby providing the force required for the saw to adhere to the pulley .

[0017] In one embodiment of the invention, said vacuum mechanism is a vacuum ej ector ( 3 ) .

[0018] In one embodiment , the invention comprises a main air pressure line ( 10 ) supplying compressed air to the mechanism .

[0019] In one embodiment , the invention comprises a central drum ( 12 ) which acts as a rotating center in the hub of the pulley ( I D •

[0020] In one embodiment of the invention, compressed air is transferred to the vacuum ej ector ( 3 ) through pressurized air pipes ( 15 ) .

[0021] In one embodiment of the invention, the compressed air source is an air pump which generates compressed air with electrical energy .

[0022] In one embodiment of the invention, electricity is transmitted within the system via positive ( 2 ) and negative ( 21 ) electrical cables .

[0023] In one embodiment of the invention, the system comprises a compressed air tank which acts as an auxiliary element to support the system to operate at a constant pressure and to prevent it from being adversely affected by sudden pressure changes in the compressed air line . In a further embodiment of the invention, the system comprises a rotary joint (13) connecting the main air pressure line (10) to the central drum (12) .

[0024] In a further embodiment of the invention, the system comprises a connecting element (14) located on the sides of the central drum (12) for guiding pressurized air pipes (15) along the circumference of the pulley (11) .

[0025] In a further embodiment of the invention, the connecting element (14) is a T-connector.

[0026] In an embodiment of the invention, vacuum ejector (3) consists of the following; the ejector housing (31) that provides structural support to the vacuum ejector (3) ,

[0027] - vacuum tube (33) that allows the vacuum to be applied to the band,

[0028] - vacuum ejector back plate (34) which secures the vacuum ejector (3) to the pulley,

[0029] - positive (6) and negative (9) electrical lines for the solenoid ejector valve or valves (32) that act as vacuum initiators , air exhaust port that allows air to be evacuated, components of the positive (7) and negative (8) electrical lines of the discharge line for the solenoid ejector valve or valves (32) that act as vacuum release.

[0030] In this embodiment of the invention, both the vacuum start valve and the vacuum release valve can utilize the same electrical line. In one embodiment of the invention, a grooved band saw bed (4) located between the vacuum ejector (3) and the saw is provided, ensuring a sufficient clearance to enable effective vacuuming and guiding for the saw. The grooved band saw bed (4) may be made of rubber, polymer, alloy, composite, etc., depending on the requirements during the application.

[0031] One embodiment of the invention provides a trigger set (5) which allows the vacuum ejector (3) to operate by providing air flow to the vacuum ejector (3) while the saw is interacting with the pulley, and stops the operation of the vacuum ejector (3) by interrupting the air flow as soon as the saw ceases to interact with the pulley.

[0032] In one embodiment of the invention, the trigger set (5) consists of the following;

[0033] - a box (51) containing the mechanism of the trigger set (5) ,

[0034] - a front cover (52) forming the front part of the trigger set ( 5 ) ,

[0035] - a back cover (53) forming the rear part of the trigger set (5) ,

[0036] - a spring (54) that enables the movement of the contact pin (55) ,

[0037] - a contact pin (55) with an electrical connection point.

[0038] A first hexagon socket button head screw is provided, allowing the vacuum ejector back plate (34) to be connected to the vacuum ejector (3) .

[0039] A second hexagon socket button head screw (17) is provided for connecting the vacuum ejector back plate (34) to the main pulley. A third hexagon socket button head screw (19) is provided for connecting the electrical back plate (1) to the trigger sets (5) .

[0040] There is provided a countersunk head screw (18) holding the vacuum ejector (3) together.

[0041] A hexagon socket button head (20) is provided for connecting the trigger set (5) to the central drum (12) .

[0042] In one embodiment of the invention, the pulleys with said vacuum system on which the saw (22) is mounted are supported by back (23) and front (24) chassis connected by a connecting rod ( 25 ) .

[0043] The invention can be used on both single and multiple band saws .

[0044] An advantage of the saw drive method of the invention is the ability of the saw to be driven with less tension force and pressure, thereby saving the total tension capacity of the saw for cutting operations and increasing the capacity for the same.

[0045] The saw drive method of the invention has another advantage in that the method allows the use of thinner saw bodies as less tension is applied to the saw, thereby permitting thinner cuts .

[0046] Descriptions of Figures

[0047] Fig. 1: A bottom view of the pulley (11)

[0048] Fig. 2: A side view of the pulley (11)

[0049] Fig. 3: A view of the central drum (12)

[0050] Fig. 4: A close-up view of the central drum (12) Fig. 5: A view of the vacuum ejector (3) components

[0051] Fig. 6: Another view of the vacuum ejector (3) components

[0052] Fig. 7: A side view of the connection between the main air pressure line (10) and the central drum (12)

[0053] Fig. 8: General view of the system ion of Reference Numbers in the

[0054] 1. Electrical back plate

[0055] 2. Electrical line +

[0056] 3. Vacuum ejector

[0057] 31. Ejector housing

[0058] 32. Solenoid ejector valve

[0059] 33. Vacuum tube

[0060] 34. Vacuum ejector back plate

[0061] 4. Grooved band saw bed

[0062] 5. Trigger set

[0063] 51. Box

[0064] 52. Front cover

[0065] 53. Back cover

[0066] 54. Spring

[0067] 55. Contact pin

[0068] 6. Vacuum valve electrical line +

[0069] 7. Exhaust valve electrical line +

[0070] 8. Exhaust valve electrical line -

[0071] 9. Vacuum valve electrical line -

[0072] 10. Main air pressure line

[0073] 11. Pulley

[0074] 12. Central drum

[0075] 13. Rotary joint

[0076] 14. Connecting element

[0077] 15. Pressurized air pipe

[0078] 16. First hexagon socket button head screw

[0079] 17. Second hexagon socket button head screw

[0080] 18. Countersunk head screw 19. Third hexagon socket button head screw

[0081] 20. Hexagon socket button head

[0082] 21. Electrical line -

[0083] 22. Saw 23. Back chassis

[0084] 24. Front chassis

[0085] 25. Connecting rod

Claims

CLAIMS1. A vacuum drive mechanism for band saws, wherein said mechanism comprises a vacuum mechanism which generates a vacuum in the region where the band saw is seated on the pulley, thereby allowing the saw to hold on to the pulley.

2. A mechanism according to claim 1, wherein said mechanism includes at least one vacuum ejector (3) located on the edges of the pulley, configured to create the gripping force required for drive by applying vacuum to the region where the saw is seated.

3. A mechanism according to claim 1, wherein said mechanism comprises a central drum (12) located in the hub of the pulley, which acts as a rotating center to the vacuum and air pressure lines.

4. A mechanism according to claim 1, wherein said mechanism includes the main air pressure line (10) that supplies pressurized air to the system.

5. A mechanism according to claim 1, wherein said mechanism includes pressurized air pipes (15) for transferring pressurized air to the vacuum ejector (3) .

6. A vacuum drive mechanism for saws according to claim 1, wherein the compressed air source is an air pump that generates compressed air with electrical energy.

7. A drive mechanism for saws according to claim 1, wherein said mechanism comprises a compressed air tank that acts as an auxiliary element for the system to operate at a constant pressure.

8. A system according to claim 1, wherein said system comprises a rotary joint (13) connecting the main air pressure line (10) to the central drum (12) .

9. A system according to claim 1, wherein said system comprises a connecting element (14) located on the edges of the central drum (12) that directs the pressurized air pipes (15) around the pulley (11) .

10. A system according to claim 1, wherein vacuum ejector (3) comprises the following:- a vacuum tube (33) that carries the vacuum to the other components of the system,- a vacuum ejector back plate (34) , which secures the vacuum ejector components to the pulley,- solenoid ejector valve (s) (32) with vacuum on-off and / or vacuum release function,- air exhaust port elements that allow air release.

11. A system according to claim 1, wherein said system comprises a grooved band saw bed (4) disposed between the vacuum ejector (3) and the saw, the bed having gaps sufficient to allow the vacuum to be effectively applied and to guide the saw.

12. A system according to claim 1, wherein said system includes a trigger set (5) allows the vacuum ejector (3) to operate by providing air flow to the vacuum ejector (3) while the saw is interacting with the pulley, and stops the operation of the vacuum ejector (3) by cutting off the air flow as soon as the saw ceases to interact with the pulley.

13. A system according to claim 1, wherein said system functions on single or multiple band saws.

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