Device for reducing sawing vibration of grinding wheel saw

Abstract

The utility model relates to the technical field of bar sawing equipment, and discloses a device for reducing sawing vibration of a grinding wheel saw, which is characterized in that a counterweight component is arranged between a platform and a sliding seat and is used for providing acting force for the sliding seat when the sliding seat drives a sawing mechanism to perform sawing operation, and the direction of the acting force is opposite to the feeding direction of the sliding seat; therefore, the sliding seat does not move back and forth, displacement in a gap of the ball screw pair is eliminated, a gap between a bearing at the positioning end of the ball screw and a locking nut can be eliminated, and vibration of a saw blade is effectively reduced. After the device is installed, the saw blade rotating speed can be increased, and saw blade consumption is reduced; the shutdown maintenance time of equipment can be reduced; the replacement period of ball screw pairs and other spare parts can be prolonged; and the phenomena of abnormal abrasion and bursting of the saw blade can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bar sawing equipment, in particular to a device for reducing sawing vibrations caused by a grinding wheel saw. Background Art

[0002] Abrasive wheel saws are commonly used in the bar rolling process in the metallurgical industry. They are used to saw the bars produced by the sizing machine into sections to the required length. The saw blade is made of a grinding wheel. The grinding wheel machine consists of a sawing mechanism, an oscillating head mechanism, a feed mechanism, and a steel clamping mechanism. The sawing mechanism is mounted on a swinging base, driving the saw blade to rotate and cut. The oscillating head mechanism is driven by a hydraulic cylinder to swing the oscillating base up and down. The hydraulic cylinder base is mounted on a slide, which is also connected to the slide via a rotating shaft, allowing the oscillating base to swing up and down. The feed mechanism is driven by a servo motor, which rotates a ball screw to drive the slide horizontally forward and backward. The clamping mechanism includes both horizontal and vertical clamping for the steel. During cutting, the servo motor drives the ball screw to rotate, driving the slide horizontally forward and backward for feed. The high-speed rotating saw blade moves with the slide to cut the steel clamped at the saw blade. Abrasive wheel saws will generate vibrations when cutting. When the vibration continues to increase, it will cause abnormal wear and tear of the saw blade, saw blade explosion, and even equipment damage, seriously affecting the company's production efficiency and wasting costs. Therefore, it is particularly important to reduce sawing vibrations.

[0003] The causes of sawing vibration include up and down jumping of the saw blade shaft, horizontal movement, substandard concentricity of the saw blade chuck, wear of the saw blade bushing and substandard saw blade quality, loose clamping of the cutting material, and unstable swing head mechanism. These can be solved through daily maintenance and adjustment. Another important reason for sawing vibration is that during the feeding process, there is a certain small gap between the ball screw pair after processing and use wear. When the saw blade feeds forward and saws, it pushes the slide forward. The saw blade generates backward resistance due to cutting, causing the slide to move back and forth at high speed in this gap and generate vibration.

[0004] There is currently no effective method to deal with the vibration generated by the feed mechanism. The common methods are to reduce the sawing feed speed and the saw blade linear speed or to stop the machine to replace the ball screw pair. Reducing the sawing feed speed affects the sawing efficiency, and reducing the saw blade rotation linear speed causes the saw blade to be consumed too quickly. Frequent replacement of spare parts causes production downtime. Summary of the Invention

[0005] The purpose of the utility model is to provide a device for reducing the sawing vibration of a grinding wheel saw, so as to solve the problem in the background art that when the saw blade is feeding forward and sawing, the gap in the ball screw pair causes the slide to move back and forth and generate vibration.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A device for reducing sawing vibration of a grinding wheel saw comprises a platform, a ball screw, a servo motor, a slide seat and a counterweight assembly; wherein:

[0008] The ball screw extends along a first direction and is rotatably mounted on the platform around its own axis;

[0009] The servo motor is installed on the platform to drive the ball screw to rotate;

[0010] The slide is slidably mounted on the platform and is threadedly engaged with the ball screw; the swing mechanism of the grinding wheel saw is mounted on the slide, and the sawing mechanism of the grinding wheel saw is mounted on the swing mechanism, so that when the ball screw rotates, the slide is driven to move along the first direction to realize the feeding and retracting of the sawing mechanism;

[0011] The counterweight assembly is installed between the platform and the slide, and is used to provide a force to the slide when the slide drives the sawing mechanism to perform sawing operations. The direction of the force is opposite to the feed direction of the slide, so that the slide does not move back and forth, thereby reducing the vibration of the saw blade.

[0012] Furthermore, the counterweight assembly includes a pulley assembly, a counterweight body and a pull rope; the first end of the pull rope extends along a first direction and is connected to the slide, and the second end of the pull rope extends along a second direction and is connected to the counterweight body after passing through the pulley assembly, and the second direction is perpendicular to the first direction, so that when the sawing mechanism feeds, the direction of the pulling force applied by the counterweight body to the slide through the pull rope is opposite to the feeding direction of the slide, so that the slide does not move back and forth, reducing the vibration of the saw blade; after the sawing mechanism is in the sawing waiting position or the saw is completely retracted, the counterweight body does not apply any force to the pull rope.

[0013] Furthermore, the counterweight assembly includes a spring assembly, which is arranged between the platform and the slide. The spring assembly is used to provide a force to the slide when the slide drives the sawing mechanism to perform sawing operations. The direction of the force is opposite to the feed direction of the slide, so that the slide does not move back and forth, thereby reducing the vibration of the saw blade.

[0014] Furthermore, the pulley assembly includes a first fixed pulley and a fixed seat; the first fixed pulley is installed on the platform through the fixed seat, the pull rope passes through the first fixed pulley, and the first end of the pull rope is connected to the slide seat, and the second end of the pull rope is connected to the counterweight.

[0015] Furthermore, the counterweight is placed below the platform.

[0016] Furthermore, the pulley assembly includes a reversing pulley group, at least part of the reversing pulley group is installed on the platform, and the rest of the reversing pulley group is installed above the platform. The pull rope passes through the reversing pulley group, and the first end of the pull rope is connected to the slide seat, and the second end of the pull rope is connected to the counterweight body.

[0017] Furthermore, the reversing pulley group includes a second fixed pulley, a third fixed pulley and a fixed seat; the second fixed pulley is installed on the platform through the fixed seat, and the third fixed pulley is installed above the platform through the fixed seat. The pull rope passes through the second fixed pulley and the third fixed pulley, and the first end of the pull rope is connected to the slide, and the second end of the pull rope is connected to the counterweight.

[0018] Furthermore, it also includes a support platform, the height of the support platform is lower than the third fixed pulley, and the counterweight body is located on the support platform.

[0019] Furthermore, when the sawing mechanism is feeding, the force provided by the counterweight assembly to the slide is equal to the power generated when the rated current of the servo motor reaches 40% to 60%.

[0020] Furthermore, the counterweight body is a weight or the counterweight body includes a frame and a counterweight block, and the counterweight block is fixed in the frame.

[0021] Furthermore, it also includes a turnbuckle, which is installed on the pull rope to adjust the length of the pull rope.

[0022] Furthermore, it also includes a shackle, the first end of the pull rope is connected to the slide seat through the shackle, and the second end of the pull rope is connected to the counterweight through the shackle.

[0023] The utility model has the following advantages over the prior art:

[0024] 1. The device for reducing the sawing vibration of the grinding wheel saw of the utility model has a simple overall structure and is easy to operate. By setting a counterweight assembly, this counterweight assembly applies a force opposite to the feed direction of the slide driven by the roller screw when the sawing mechanism is feeding, thereby pulling the slide to prevent it from moving back and forth, not only eliminating the displacement in the gap of the ball screw pair, but also eliminating the gap between the ball screw positioning end bearing and the locking nut, thereby reducing the saw blade vibration caused by the feeding action in all directions.

[0025] 2. In this device for reducing sawing vibration during grinding wheel cutting, the counterweight assembly provides a force to the slide during cutting, preferably 40% to 60% (50% is optimal) of the servo motor's rated current. A weight that is too light will not eliminate backlash, while a weight that is too heavy will increase the motor load. Installing the counterweight assembly effectively reduces sawing vibration caused by the slide's back-and-forth movement.

[0026] 3. The counterweight assembly of the present invention's device for reducing sawing vibrations in a grinding wheel saw can be a combination of a pulley and a counterweight, a spring-loaded weight, or a spring-mounted fixed position. The overall device is simple and easy to implement, requiring minimal investment to achieve the desired effect of reducing sawing vibrations in a grinding wheel saw. In actual production, installing this device can increase saw blade speed and reduce saw blade consumption; reduce equipment downtime for maintenance; extend the replacement cycle for spare parts such as ball screws; and reduce abnormal saw blade wear and cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a device for reducing sawing vibration of a grinding wheel saw in Example 1 of the present utility model;

[0028] Figure 2 This is a schematic structural diagram of a pulley assembly of a device for reducing sawing vibration of a grinding wheel saw in Example 2 of the present utility model;

[0029] In the figure: 1. Platform; 2. Ball screw; 3. Servo motor; 4. Slide; 5. Swing mechanism; 6. Sawing mechanism; 7. Counterweight; 8. Pull rope; 9. First fixed pulley; 10. Fixed seat; 11. Second fixed pulley; 12. Third fixed pulley; 13. Support platform; 14. Shackle; X, first direction. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] It should be noted that, in the description of the present invention, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0032] In addition, it should be understood that for the convenience of description, the sizes of the various components shown in the drawings are not drawn according to the actual scale.

[0033] It should be noted that like numbers and letters represent similar items in the following figures, so once an item is defined or described in one figure, it will not need to be further discussed and described in detail in the description of the subsequent figures.

[0034] Example 1:

[0035] like Figure 1 As shown: A device for reducing the sawing vibration of a grinding wheel saw, comprising a platform 1, a ball screw 2, a servo motor 3, a slide 4 and a counterweight assembly; the ball screw 2 moves in a first direction ( Figure 1 The servo motor 3 is installed on the platform 1 to drive the ball screw 2 to rotate; the slide 4 is slidably installed on the platform 1 and is threadedly matched with the ball screw 2; the swing mechanism 5 of the grinding wheel saw is installed on the slide 4, and the sawing mechanism 6 of the grinding wheel saw is installed on the swing mechanism 5, so that when the ball screw 2 rotates, the slide 4 is driven to move along the first direction, and the swing mechanism 5 and the sawing mechanism 6 are displaced with the slide 4 to realize the feeding and retracting of the sawing mechanism 6; wherein, the sawing mechanism has a rotatable saw blade, and the swing mechanism drives the sawing mechanism to swing its head to adapt to rods of different sizes.

[0036] The counterweight assembly is installed between the platform 1 and the slide 4, and is used to provide a force to the slide 4 when the slide 4 drives the sawing mechanism 6 to perform sawing operations. The direction of the force is opposite to the feed direction of the slide 4, which not only eliminates the clearance of the ball screw pair, but also eliminates the clearance of the ball screw positioning end bearing and the locking nut, so that the slide 4 does not move back and forth, and the vibration of the saw blade is reduced. In specific implementation, the force provided by the counterweight assembly to the slide is equal to the power generated when the rated current of the servo motor reaches 40% to 60% (50% is optimal). By installing this device on the grinding wheel saw machine, not only can the vibration generated during sawing be reduced, so that the saw blade will not be abnormally worn or exploded, the spare parts replacement cycle can be extended, and the sawing efficiency can be improved, but the equipment can also be protected from damage due to vibration.

[0037] like Figure 1As shown, the counterweight assembly in this embodiment includes a pulley assembly, a counterweight 7 and a pull rope 8; the first end of the pull rope 8 extends along a first direction and is connected to the slide 4, and the second end of the pull rope 8 extends along a second direction after passing through the pulley assembly and is connected to the counterweight 7, the second direction being perpendicular to the first direction. In this embodiment, the counterweight is set below the platform. The counterweight 7 can be placed directly on the ground or on a support 13 lower than the platform 1. When the counterweight 7 is pulled up, it exerts a force on the slide by its own weight. When the sawing mechanism is feeding under the drive of the slide, the slide moves and drives the counterweight to rise through the pull rope. After the counterweight is pulled up and suspended in the air, it exerts a force opposite to its feeding direction on the slide due to its own weight, thereby pulling the slide to prevent it from moving back and forth, eliminating the displacement in the gap of the ball screw pair and reducing sawing vibration. When the sawing mechanism is in the sawing waiting position or completely retracted, the counterweight is completely on the ground and is not subject to tension. The pull rope is in a relaxed state and does not affect the positioning of the waiting position.

[0038] The pulley assembly includes a first fixed pulley 9 and a fixed base 10. The first fixed pulley 9 is mounted on the platform 1 via the fixed base 10. After the pull rope 8 passes through the first fixed pulley 9, the first end of the pull rope 8 extends in a first direction and connects to the slide 4. The second end of the pull rope 4 extends in a second direction and connects to the counterweight 7. The pull rope in this embodiment can be a pull rope or other wear-resistant and high-tensile-strength pull rope. The counterweight assembly in this embodiment utilizes a pulley and pull rope combination, with the first fixed pulley 9 used to change the pulling direction of the pull rope. This overall implementation is simple and cost-effective. During the sawing mechanism's feed operation, the counterweight 7 can apply a force opposite to the feed direction to the slide by its own weight, thereby preventing the slide from moving back and forth and reducing sawing vibration. The counterweight 7 can be a weight or comprise a frame and a counterweight block, with the counterweight block fixed within the frame. The specific form of the counterweight is not critical; it only needs to be able to cooperate with the pull rope to apply force to the slide during feed operation. The saw also includes a turnbuckle 14, which is mounted on the drawstring and used to adjust its length to ensure a suitable length. This allows the saw to pull the drawstring and the counterweight upward when the saw begins sawing. When the saw is in the waiting position, the drawstring is relaxed, meaning the counterweight is completely on the ground and free from tension, thus not affecting the waiting position. The saw also includes a shackle 14, through which the first end of the drawstring 8 is connected to the slide 4, and the second end of the drawstring 8 is connected to the counterweight. The shackle 14 allows the drawstring to be quickly connected to the slide and counterweight.

[0039] When this device works:

[0040] The cutting mechanism clamps the bar, and after the swing seat swings the saw blade to a low position, the servo motor 3 drives the ball screw 2 to rotate, and the ball nut and nut seat drive the slide 4 to move forward in the sawing direction to start sawing. At this time, the counterweight 7 is pulled up and off the ground, and gravity pulls it down to eliminate the gap between the ball screw pair and the gap between the ball screw positioning end bearing and the locking nut, so that the slide 4 does not move back and forth and reduces vibration. After the sawing is completed, the swing seat lifts the saw blade away from the cutting material, and the servo motor 3 reverses direction and rotates to retract the saw, and stops after returning to the zero position and the sawing waiting position. The counterweight 7 drops back to the ground. At this time, the pull rope is in a relaxed state, and a sawing cycle is completed.

[0041] Example 2:

[0042] This embodiment is the same as embodiment 1 except for the following technical solutions:

[0043] like Figure 2 As shown: the pulley assembly includes a reversing pulley group, at least part of which is mounted on the platform 1, and the rest of the reversing pulley group is mounted above the platform 1. After the pull rope 8 passes through the reversing pulley group, the first end of the pull rope 8 extends in the first direction and is connected to the slide, and the second end of the pull rope 8 extends in the second direction and is connected to the counterweight 7. The specific structure of the reversing pulley group includes a second fixed pulley 11, a third fixed pulley 12, and a fixed seat; the second fixed pulley 11 is mounted on the platform 1 through the fixed seat, and the third fixed pulley 12 is mounted above the platform 1 through the fixed seat. The pull rope 8 passes through the second fixed pulley 11 and the third fixed pulley 12, and the first end of the pull rope 8 is connected to the slide 4, and the second end of the pull rope 8 is connected to the counterweight 7. This embodiment is aimed at a grinding wheel saw machine with no space below the platform. By setting two sets of pulleys for reversing, the counterweight is placed in the space above the platform. The counterweight 7 is placed on a support platform 13 and the height of the support platform 13 is ensured to be lower than the third fixed pulley 12, so that the counterweight can rely on its own gravity to apply a force opposite to the feed direction of the slide when the grinding wheel saw starts to cut and move forward.

[0044] Example 3:

[0045] This embodiment is the same as embodiment 1 except for the following technical solutions:

[0046] The counterweight assembly in this embodiment includes a spring assembly, wherein the spring assembly is a spring that drags a heavy object or a spring that connects a fixed object, etc. The spring assembly is arranged between the platform and the slide. When the slide drives the sawing mechanism to perform sawing operations, the spring provides a spring force to the slide that is opposite to the feed direction of the slide, thereby pulling the slide to eliminate the clearance of the ball screw pair and the clearance between the ball screw positioning end bearing and the locking nut, so that the slide cannot move back and forth, thereby reducing the vibration of the saw blade.

[0047] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for reducing sawing vibration of a grinding wheel saw, characterized in that: It includes a platform, a ball screw, a servo motor, a slide and a counterweight assembly; wherein: The ball screw extends along a first direction and is rotatably mounted on the platform around its own axis; The servo motor is installed on the platform to drive the ball screw to rotate; The slide is slidably mounted on the platform and is threadedly engaged with the ball screw; the swing mechanism of the grinding wheel saw is mounted on the slide, and the sawing mechanism of the grinding wheel saw is mounted on the swing mechanism, so that when the ball screw rotates, the slide is driven to move along the first direction to realize the feeding and retracting of the sawing mechanism; The counterweight assembly is installed between the platform and the slide, and is used to provide a force to the slide when the slide drives the sawing mechanism to perform sawing operations. The direction of the force is opposite to the feed direction of the slide, so that the slide does not move back and forth, thereby reducing the vibration of the saw blade.

2. The device for reducing sawing vibration of a grinding wheel saw according to claim 1, characterized in that: The counterweight assembly includes a pulley assembly, a counterweight body and a pull rope; the first end of the pull rope extends along a first direction and is connected to the slide, and the second end of the pull rope extends along a second direction after passing through the pulley assembly and is connected to the counterweight body, and the second direction is perpendicular to the first direction, so that when the sawing mechanism feeds, the direction of the pulling force applied by the counterweight body to the slide through the pull rope is opposite to the feeding direction of the slide, so that the slide does not move back and forth, reducing the vibration of the saw blade; after the sawing mechanism is in the sawing waiting position or the saw is completely retracted, the counterweight body does not apply any force to the pull rope.

3. The device for reducing sawing vibration of a grinding wheel saw according to claim 1, characterized in that: The counterweight assembly includes a spring assembly, which is arranged between the platform and the slide. The spring assembly is used to provide a force for the slide when the slide drives the sawing mechanism to perform a sawing operation.

4. The device for reducing sawing vibration of a grinding wheel saw according to claim 2, characterized in that: The pulley assembly includes a first fixed pulley and a fixed seat; the first fixed pulley is installed on the platform through the fixed seat, the pull rope passes through the first fixed pulley, and the first end of the pull rope is connected to the slide seat, and the second end of the pull rope is connected to the counterweight.

5. The device for reducing sawing vibration of a grinding wheel saw according to claim 2 or 4, characterized in that: The counterweight body is placed below the platform.

6. The device for reducing sawing vibration of a grinding wheel saw according to claim 2, characterized in that: The pulley assembly includes a reversing pulley group, at least part of which is installed on the platform, and the rest of the reversing pulley group is installed above the platform. The pull rope passes through the reversing pulley group, and the first end of the pull rope is connected to the slide seat, and the second end of the pull rope is connected to the counterweight body.

7. The device for reducing sawing vibration of a grinding wheel saw according to claim 6, characterized in that: The reversing pulley group includes a second fixed pulley, a third fixed pulley and a fixed seat; the second fixed pulley is installed on the platform through the fixed seat, and the third fixed pulley is installed above the platform through the fixed seat. The pull rope passes through the second fixed pulley and the third fixed pulley, and the first end of the pull rope is connected to the slide, and the second end of the pull rope is connected to the counterweight.

8. The device for reducing sawing vibration of a grinding wheel saw according to claim 7, characterized in that: It also includes a support platform, the height of which is lower than the third fixed pulley, and the counterweight is located on the support platform.

9. The device for reducing sawing vibration of a grinding wheel saw according to claim 1, characterized in that: When the sawing mechanism is feeding, the force provided by the counterweight assembly to the slide is equal to the power generated when the rated current of the servo motor reaches 40% to 60%.

10. The device for reducing sawing vibration of a grinding wheel saw according to claim 2, characterized in that: The counterweight body is a weight or comprises a frame and a counterweight block, and the counterweight block is fixed in the frame.

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