A band saw for cutting copper bars

Abstract

This invention belongs to the field of sawing equipment, specifically disclosing a band saw for cutting copper rods. It includes a machine body, a saw blade, and a guide rod. A guide wheel is rotatably mounted at the lower end of the guide rod to guide the saw blade. The saw blade passes between two opposing guide wheels. A fixed seat is mounted on the guide rod in front of the guide wheel, and the fixed seats are symmetrically distributed on both sides of the saw blade. The fixed seat has an assembly cavity inside, and a scraper is rotatably mounted within the assembly cavity. The working end of the scraper passes through the side wall of the assembly cavity, adjacent to but not in contact with the saw blade. A nozzle is mounted on the fixed seat. The invention also includes a pressing mechanism that uses the forward movement of the saw blade to drive the guide wheel to rotate, generating pressure to cause the working end of the scraper to abut against the side wall of the saw blade, thus scraping away sawdust from the side wall of the saw blade. An elastic part is provided on the lower side of the scraper. When the machine stops, the working end of the scraper disengages from the side wall of the saw blade, preventing the scraper from being constantly under stress, reducing the risk of bending and deformation, and improving the scraper's service life.

Description

Technical Field

[0001] This invention relates to the field of sawing equipment technology, and more specifically to a band saw for cutting copper rods. Background Technology

[0002] Band saws are mainly used for sawing various alloy and metal materials such as carbon structural steel, low alloy steel, high alloy steel, special alloy steel, stainless steel, and copper rods. They are classified into horizontal and vertical types according to their structure. They mainly rely on a highly rotating annular saw band on the machine body to cut the workpiece.

[0003] For example, the invention with application number 201621284671.6 discloses a horizontal band saw with a clamping mechanism. By setting a guide arm on the crossbeam and a guide head at the bottom of the guide arm, the guide head includes a guide body. A bearing fixing mechanism is set on one side of the guide body. The bearing fixing mechanism is equipped with double rows of guide bearings. In this way, the saw band passes through the guide body and then through the guide bearings. Under the guidance of the guide body and the guide bearings, the saw band cutting segment is kept in a vertical state.

[0004] The guide body, also known as the guide block, guide plate, or guide wheel, is generally made of alloy material. It consists of two guide bodies arranged opposite each other, with the saw blade clamped between the two guide blocks. In this way, the saw blade is kept perpendicular between the two guide blocks to achieve the guiding purpose.

[0005] Existing band saws use guide blocks to guide the saw blade effectively. However, in actual use, the guide blocks experience severe wear. This is mainly due to two reasons: first, the long-term friction between the saw blade and the guide block causes wear; second, during sawing, cutting debris attached to the saw blade is carried into the guide block, further increasing wear. Therefore, to reduce the amount of cutting debris carried into the guide block, spray nozzles are usually installed beside the saw blade to spray water and wash the saw blade. However, this method of cleaning solely with water is not very effective. Generally, some debris still adheres to the saw blade. Therefore, in related technologies, a scraper is installed on the side of the saw blade, along with a spring. The spring keeps the scraper in contact with the saw blade to clean it. While this method of cleaning the saw blade with a scraper can effectively remove debris, the scraper is always in contact with the saw blade under the action of the spring, even when the machine is stopped. This means the scraper is constantly under stress, making it more prone to bending and deformation, which is detrimental to its service life. Summary of the Invention

[0006] The purpose of this invention is to provide a band saw for cutting copper rods. When the machine is on, the working end of the scraper is pressed against the side wall of the saw band to clean the saw band. When the machine is stopped, the working end of the scraper is disengaged from the side wall of the saw band, which avoids the scraper being under constant stress, prevents the scraper from bending and deforming, and improves the service life of the scraper.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0008] A band saw for cutting copper rods includes a machine body, a saw blade rotatably mounted on the machine body, and guide rods mounted on the machine body. Along the saw blade's forward direction, the guide rods are distributed on the saw blade's entry and exit sides. A guide wheel is rotatably mounted at the lower end of the guide rod to guide the saw blade. The saw blade passes between two opposing guide wheels. A fixed seat is mounted on the guide rod in front of the guide wheel. The fixed seats are symmetrically distributed on both sides of the saw blade. An assembly cavity is located inside the fixed seat. A scraper is rotatably mounted inside the assembly cavity. The working end of the scraper passes through the side wall of the assembly cavity, adjacent to the saw blade but not in contact with it. A nozzle is mounted on the fixed seat to spray liquid toward the working end of the scraper. The machine also includes a pressing mechanism that relies on the forward movement of the saw blade to drive the guide wheel to rotate, generating pressure to make the working end of the scraper abut against the side wall of the saw blade, thus scraping away sawdust from the side wall of the saw blade. An elastic portion is provided on the lower side of the scraper.

[0009] In this design, a fixed seat is installed at the front end of the guide wheel. The fixed seats are symmetrically distributed on both sides of the saw blade. A scraper is rotatably installed in the assembly cavity inside the fixed seat. Under the action of external force, the scraper can rotate relative to the fixed seat. When not in operation, the working end of the scraper is close to the side wall of the saw blade but does not contact it. When in operation, the saw blade moves at high speed and passes between the opposing guide wheels. Relying on friction, the saw blade drives the guide wheel to rotate. The rotation of the guide wheel generates pressure, which pushes the scraper to rotate at a certain angle and compresses the elastic part. After the scraper rotates, its working end abuts against the side walls of the saw blade. The continuous movement of the saw blade will continuously drive the guide wheel to rotate, thereby generating continuous pressure that makes the working end of the scraper abut against the side wall of the saw blade. The saw blade is continuously scraped during continuous operation, preventing the saw blade from carrying sawdust into the rear guide wheel.

[0010] At the same time, while the scraper is cleaning, the nozzle sprays liquid onto the saw blade. The sprayed liquid moves in the opposite direction to the saw blade, washing away the sawdust adhering to the working end of the scraper during the cleaning process, thus improving the scraping effect of the scraper. Through the rinsing of the water flow and the scraping of the scraper, the sawdust on the saw blade is cleaned together.

[0011] It is worth noting that in this solution, the force required for the scraper to rotate comes from the rotation of the guide wheel, which in turn comes from the movement of the saw blade. Therefore, when the saw blade is not working, the guide wheel will stop rotating, thereby releasing the force and pressure acting on the scraper. Unable to overcome the elastic force of the elastic part, the scraper resets, causing the working end of the scraper to disengage from the side wall of the saw blade. This allows the working end of the scraper to abut against the side wall of the saw blade to clean the saw blade when the machine is running. When the machine is stopped, the working end of the scraper disengages from the side wall of the saw blade, preventing the scraper from being under constant stress. This reduces the risk of bending and deformation of the scraper and improves its service life.

[0012] Optionally, the pressing mechanism includes a power unit and an execution unit that applies pressure to the scraper. The execution unit presses the scraper and squeezes the elastic part. The power unit provides pressure to the execution unit. The power unit is connected to the guide wheel. The forward movement of the saw blade drives the guide wheel to rotate, thereby providing driving force to the power unit.

[0013] Optionally, the power unit is an impeller, which is connected to the lower end of the shaft of the guide wheel. A volute is provided on the outside of the impeller. The actuator is an airbag, which is located on the upper side of the scraper. The airbag is connected to the air outlet end of the volute. An air mesh plate is provided on the bottom surface of the volute. An exhaust valve located on the fixed seat is connected to the airbag. When the exhaust valve is opened, the elastic part drives the scraper to reset, causing the working end of the scraper to separate from the side wall of the saw blade. The rotation of the guide wheel drives the impeller to rotate, which inflates the airbag. The inflated airbag expands and squeezes the scraper, causing the working end of the scraper to abut against the side wall of the saw blade.

[0014] Optionally, the mounting cavity sidewall of the fixed base is provided with a pressure regulating part, the scraper is provided with an air outlet channel, the outlet of the air outlet channel faces the saw blade sidewall, the pressure regulating part includes a base and a sleeve connected to the top of the base, the base is provided with an air inlet chamber communicating with the airbag, the sleeve sidewall is provided with an air outlet hole communicating with the air outlet channel, and a pressure regulating component for adjusting the air pressure inside the airbag is provided on the air path communicating with the air inlet chamber and the air outlet hole.

[0015] Optionally, multiple air outlet channels are distributed at intervals along the width direction of the scraper, and the inlets of the multiple air outlet channels are connected to the air collecting channels in the scraper. The air collecting channels are connected to the air outlets via flexible hoses.

[0016] Optionally, the pressure regulating assembly includes a sliding ring, a vertical rod, an adjusting block, and a spring. The sliding ring is adapted to the inner cavity of the sleeve and is located below the air outlet. The lower end of the vertical rod passes through the sliding ring and is connected to the bottom wall of the air inlet cavity, while the upper end passes through the adjusting block. The adjusting block is threadedly connected to the inner wall of the sleeve. One end of the spring acts on the adjusting block, and the other end acts on the sliding ring. Under the action of the air pressure inside the air inlet cavity, the sliding ring can slide relative to the vertical rod and the sleeve.

[0017] Optionally, a first sealing ring is axially embedded in the outer wall of the sliding ring, and a second sealing ring is circumferentially embedded in the inner wall of the sliding ring.

[0018] Optionally, a limiting block connected to the inner wall of the sleeve is provided below the sliding ring.

[0019] Optionally, the side wall of the fixed seat is provided with a notch for the scraper to pass through, and the width of the notch is greater than the thickness of the scraper.

[0020] Optionally, the elastic part is an elastic sheet, which is V-shaped. The included angle of the elastic sheet is adapted to the tilt angle of the scraper. One side of the elastic sheet acts on the bottom surface of the scraper, and the other side acts on the inner wall of the assembly cavity.

[0021] The beneficial effects of this invention are as follows:

[0022] In this invention, the force required for the scraper to rotate comes from the rotation of the guide wheel, which in turn comes from the movement of the saw blade. Therefore, when the saw blade is not working, the guide wheel stops rotating, and the force acting on the scraper is released. Unable to overcome the elastic force of the elastic part, the scraper resets, causing the working end of the scraper to disengage from the side wall of the saw blade. This allows the working end of the scraper to abut against the side wall of the saw blade to clean the saw blade when the machine is running. When the machine is stopped, the working end of the scraper disengages from the side wall of the saw blade, preventing the scraper from being under constant stress. This reduces the risk of bending and deformation of the scraper and improves its service life. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a side view of the guide rod structure.

[0025] Figure 3 This is a schematic diagram of the structure when the working end of the scraper is in contact with the saw blade.

[0026] Figure 4 This is a schematic diagram of the structure when the working end of the scraper is separated from the saw blade.

[0027] Figure 5 This is a top view schematic diagram showing the distribution of the guide wheels and the fixed base;

[0028] Figure 6 This is a schematic diagram of the distribution structure of the collecting and discharging air channels within the scraper.

[0029] Figure 7 This is a schematic diagram of the pressure regulating section.

[0030] Reference numerals: 1-Fixed base, 2-Guide rod, 3-Guide wheel, 4-Saw blade, 5-Pressure regulating part, 501-Base, 502-Sleeve, 503-Air inlet chamber, 504-Sliding ring, 505-Upright rod, 506-Adjusting block, 507-Spring, 508-First sealing ring, 509-Second sealing ring, 510-Limiting block, 511-Air outlet, 6-Volume, 7-Impeller, 8-Air mesh plate, 9-Fixed plate, 10-Mounting cavity, 11-Rotating shaft, 12-Exhaust valve, 13-Airbag, 14-Scraper, 1401-Working end, 1402-Collecting airway, 1403-Exit airway, 15-Nozzle, 16-Elastic part, 17-Notch, 18-Assembly cavity. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0032] A band saw for cutting copper rods includes a machine body, a saw blade 4 rotatably mounted on the machine body, and guide rods 2 mounted on the machine body. Along the forward direction of the saw blade 4, the guide rods 2 are distributed on the entry and exit sides of the saw blade 4. A guide wheel 3 is rotatably mounted at the lower end of the guide rod 2 to guide the saw blade 4. The saw blade 4 passes between two opposing guide wheels 3. A fixed seat 1 is provided on the guide rod 2, located in front of the guide wheel 3. The fixed seats 1 are symmetrically distributed on both sides of the saw blade 4, and the fixed seat 1 has a mounting mechanism inside. The assembly cavity 18 contains a scraper 14 that is rotatably mounted therein. The working end 1401 of the scraper 14 passes through the side wall of the assembly cavity 18, adjacent to the saw blade 4 but not in contact with it. The fixed base 1 is provided with a nozzle 15 that sprays liquid toward the working end 1401 of the scraper 14. The assembly cavity 18 also includes a top pressing mechanism that uses the forward movement of the saw blade 4 to drive the guide wheel 3 to rotate and generate pressure so that the working end 1401 of the scraper 14 abuts against the side wall of the saw blade 4 to scrape away the saw chips on the side wall of the saw blade 4. The scraper 14 has an elastic part 16 on its lower side.

[0033] In this embodiment, as Figure 1 As shown, it mainly includes a machine body (not shown in the figure), a saw blade 4 rotatably mounted on the machine body, and two guide rods 2 mounted on the machine body. The guide rods 2 are equivalent to guide arms in the prior art. The saw blade 4 has a ring structure and is mounted on two drive wheels on the machine body. The rotation of the two drive wheels drives the saw blade 4 to rotate, and under the guidance of the two guide rods 2, a sawing segment is formed between the two guide arms. Such a band saw is disclosed in the prior art, so it will not be described in detail here.

[0034] Along the forward direction of the saw blade 4, one of the two guide rods 2 is located on the inlet side of the saw blade 4, and the other is located on the outlet side of the saw blade 4. The saw blade 4 rotates clockwise. At this time, the part of the saw blade 4 between the two guide rods 2 rotates from right to left.

[0035] At this point, the right side is the input side of saw band 4, and the left side is the output side of saw band 4. Figure 2 As shown, the lower end of the guide rod 2 has a U-shaped mounting cavity 10, and two guide wheels 3 are installed in the mounting cavity 10. The gap between the two guide wheels 3 is set to allow the saw blade 4 to pass through. During operation, the saw blade 4 passes through the gap between the two opposing guide wheels 3. In this way, the two guide wheels 3 clamp the saw blade 4, ensuring that the saw blade 4 will not deflect during operation. At the same time, when the saw blade 4 moves, it drives the guide wheels 3 to rotate.

[0036] Fixed plates 9 are spaced apart on the side wall of the mounting cavity 10. The fixed plates 9 are distributed vertically. A guide wheel 3 is rotatably installed between the two fixed plates 9. The rotating shaft 11 of the guide wheel 3 is rotatably installed with the upper and lower fixed plates 9 respectively. In order to improve the rotation flexibility of the guide wheel 3, a bearing can be installed in the fixed plate 9. The rotating shaft 11 of the guide wheel 3 is connected to the inner ring of the bearing.

[0037] The saw blade 4 moves from right to left. The right side of the guide rod 2 is defined as the front end of the guide wheel 3. In this embodiment, the fixing seat 1 is located on the right side of the right guide rod 2. The fixing seat 1 is connected to the guide rod 2. The end of the scraper 14 away from its working end 1401 is hinged to the inner wall of the assembly cavity 18. The scraper 14 is inclined. Figure 5 As shown, the scrapers 14 on both sides of the saw blade 4 form a V-shape, and the working end 1401 of the scraper 14 is an inclined surface.

[0038] In this embodiment, a fixed seat 1 is provided at the front end of the guide wheel 3. The fixed seats 1 are symmetrically distributed on both sides of the saw blade 4. A scraper 14 is rotatably provided in the assembly cavity 18 inside the fixed seat 1. The scraper 14 can rotate relative to the fixed seat 1 under the action of external force. When not working, the working end 1401 of the scraper 14 is close to the side wall of the saw blade 4 but does not contact it. When working, the saw blade 4 moves at high speed through the relative guide wheels 3. Relying on friction, the saw blade 4 drives the guide wheel 3 to rotate. The rotation of the guide wheel 3 generates pressure to push the scraper 14 to rotate at a certain angle and compress the elastic part 16. After the scraper 14 rotates, its working end 1401 abuts against the side walls of the saw blade 4. The continuous movement of the saw blade 4 will continuously drive the guide wheel 3 to rotate, thereby generating continuous pressure so that the working end 1401 of the scraper 14 abuts against the side wall of the saw blade 4. The saw blade 4 is continuously scraped during continuous operation to prevent the saw blade 4 from bringing sawdust into the rear guide wheel 3.

[0039] At the same time, while the scraper 14 is cleaning, the nozzle 15 sprays liquid onto the saw blade 4. The sprayed liquid moves in the opposite direction to the movement of the saw blade 4, washing away the sawdust adhering to the working end 1401 of the scraper 14 during the cleaning process, thereby improving the cleaning effect of the scraper 14. Through the rinsing of the water flow and the cleaning of the scraper 14, the sawdust on the saw blade 4 is cleaned together.

[0040] It is worth noting that in this solution, the force required for the scraper 14 to rotate comes from the rotation of the guide wheel 3, which in turn comes from the movement of the saw blade 4. Therefore, when the saw blade 4 is not working, the guide wheel 3 will stop rotating, thereby releasing the pressure on the scraper 14. Unable to overcome the elastic force of the elastic part 16, the scraper 14 resets, causing the working end 1401 of the scraper 14 to disengage from the side wall of the saw blade 4. This allows the working end 1401 of the scraper 14 to abut against the side wall of the saw blade 4 to clean the saw blade 4 when the machine is running. When the machine is stopped, the working end 1401 of the scraper 14 disengages from the side wall of the saw blade 4, preventing the scraper 14 from being under constant stress. This also prevents the scraper 14 from bending or deforming, thus improving the service life of the scraper 14.

[0041] Furthermore, the pressing mechanism includes a power unit and an execution unit that applies pressure to the scraper 14. The execution unit presses the scraper 14 and squeezes the elastic part 16. The power unit provides pressure to the execution unit. The power unit is connected to the guide wheel 3. The forward movement of the saw blade 4 drives the guide wheel 3 to rotate, thereby providing driving force to the power unit.

[0042] Furthermore, the power unit is an impeller 7, which is connected to the lower end of the shaft 11 of the guide wheel 3. A volute 6 is provided on the outer side of the impeller 7. The actuator is an airbag 13, which is located on the upper side of the scraper 14. The airbag 13 is connected to the air outlet end of the volute 6. An air mesh plate 8 is provided on the bottom surface of the volute 6. An exhaust valve 12 located on the fixed seat 1 is connected to the airbag 13. When the exhaust valve 12 is opened, the elastic part 16 drives the scraper 14 to reset, so that the working end 1401 of the scraper 14 is separated from the side wall of the saw blade 4. The rotation of the guide wheel 3 drives the impeller 7 to rotate and inflate the airbag 13. The inflated airbag 13 expands and squeezes the scraper 14, so that the working end 1401 of the scraper 14 abuts against the side wall of the saw blade 4.

[0043] Specifically, such as Figure 3As shown, the impeller 7 is the existing impeller 7 in a centrifugal blower, belonging to the existing structure. However, in this design, the size of the impeller 7 is reduced. The shaft 11 of the guide wheel 3 extends downwards and connects to the middle of the impeller 7. Thus, the rotation of the guide wheel 3 drives the impeller 7 to rotate. A volute 6 is installed on the outer side of the impeller 7. The volute 6 is also a scaled-down version of the housing of an existing centrifugal blower. The volute 6 is connected to the guide rod 2. The installation of the volute 6 should not interfere with the movement of the saw blade 4. An air mesh plate 8 is also provided on the bottom surface of the volute 6. The air mesh plate 8 is a plate with mesh holes, connected to the bottom surface of the volute 6, for air to enter the volute. Inside the housing 6, an airbag 13 is located above the scraper 14 within the assembly cavity 18. The airbag 13 is connected to the air outlet of the volute 6 via a hose passing through the side wall of the assembly cavity 18. The rotation of the guide wheel 3 drives the impeller 7 to rotate, thus inflating the airbag 13. The inflated airbag 13 exerts pressure on the scraper 14, causing it to rotate and its working end 1401 to press against the side wall of the saw blade 4, effectively scraping away sawdust. When the machine stops, the saw blade 4 stops moving, the guide wheel 3 stops rotating, and the impeller 7 stops inflating the airbag 13. Figure 4 As shown, at this time, the exhaust valve 12 is opened to release the gas in the airbag 13, thereby releasing the pressure on the scraper 14. Under the action of the elastic part 16, the scraper 14 rotates to its original position, and the working end 1401 of the scraper 14 separates from the side wall of the saw blade 4. This can prevent the scraper 14 from being under stress all the time, and the scraper 14 is less likely to be bent or deformed, thus improving the service life of the scraper 14.

[0044] Furthermore, the mounting cavity 18 of the fixed base 1 is provided with a pressure regulating part 5 on its side wall, and the scraper 14 is provided with an air outlet channel 1403 inside. The outlet of the air outlet channel 1403 faces the side wall of the saw blade 4. The pressure regulating part 5 includes a base 501 and a sleeve 502 connected to the top of the base 501. The base 501 is provided with an air inlet chamber 503 that communicates with the airbag 13. The side wall of the sleeve 502 is provided with an air outlet hole 511 that communicates with the air outlet channel 1403. A pressure regulating component for adjusting the air pressure inside the airbag 13 is provided on the air path that connects the air inlet chamber 503 and the air outlet hole 511.

[0045] Specifically, a pressure regulating section 5 is provided on the side wall of the assembly cavity 18. The continuous movement of the saw blade 4 causes the impeller 7 to continuously inflate the air bag 13. However, in order to ensure that the air bag 13 can continuously exert pressure on the scraper 14 without bursting, and that the scraper 14 can stably contact the side wall of the saw blade 4, the exhaust valve 12 cannot be opened at this time. Excess gas inside the air bag 13 is transported to the air outlet channel 1403 inside the scraper 14 through the pressure regulating section 5. The air outlet channel 1403 sprays the excess gas onto the saw blade 4. The sawdust on the saw blade 4 is blown away, and the sprayed gas can combine with the liquid in the nozzle 15 to improve the cleaning effect of the sawdust. When the air pressure inside the airbag 13 reaches a certain threshold, the inner cavity of the airbag 13 is connected to the air outlet 511 to expel excess gas. When the pressure is below the threshold, the pressure regulating component blocks the connection between the airbag 13 and the air outlet 511. This ensures that the airbag 13 is within a stable air pressure range, so that the scraper 14 can stably contact the side wall of the saw blade 4.

[0046] Furthermore, multiple air outlet channels 1403 are distributed at intervals along the width direction of the scraper 14. The inlets of the multiple air outlet channels 1403 are connected to the air collecting channel 1402 in the scraper 14. The air collecting channel 1402 is connected to the air outlet 511 through a flexible tube.

[0047] Specifically, such as Figure 6 As shown, multiple air outlet channels 1403 are evenly distributed along the width direction inside the scraper 14. The inlets of the multiple air outlet channels 1403 are connected to the collecting channel 1402. The collecting channel 1402 is connected to the airbag 13 through a hose. The hose needs to have a certain margin. Excess gas in the airbag 13 is transported to the collecting channel 1402 through the hose, and then transported to the air outlet channels 1403 respectively, and sprayed onto the side wall of the saw band 4. The spraying range is the width range of the scraper 14.

[0048] Furthermore, the pressure regulating assembly includes a sliding ring 504, a vertical rod 505, an adjusting block 506, and a spring 507. The sliding ring 504 is adapted to the inner cavity of the sleeve 502 and is located below the air outlet 511. The lower end of the vertical rod 505 passes through the sliding ring 504 and is connected to the bottom wall of the air inlet chamber 503, while the upper end passes through the adjusting block 506. The adjusting block 506 is threadedly connected to the inner wall of the sleeve 502. One end of the spring 507 acts on the adjusting block 506, and the other end acts on the sliding ring 504. Under the action of the air pressure inside the air inlet chamber 503, the sliding ring 504 can slide relative to the vertical rod 505 and the sleeve 502.

[0049] Furthermore, a first sealing ring 508 is axially embedded in the outer wall of the sliding ring 504, and a second sealing ring 509 is circumferentially embedded in the inner wall of the sliding ring 504.

[0050] Furthermore, a limiting block 510 connected to the inner wall of the sleeve 502 is provided below the sliding ring 504.

[0051] like Figure 7 As shown, the specific principle of the pressure regulating component is as follows: When the air pressure inside the airbag 13 exceeds the set threshold, that is, when the air pressure inside the air inlet chamber 503 can overcome the elastic force of the spring 507 and atmospheric pressure, the air pressure inside the air inlet chamber 503 pushes the sliding ring 504 upward. The sliding ring 504 moves along the axis of the upright 505 and compresses the spring 507 until the first sealing ring 508 on the outside of the sliding ring 504 moves upward beyond the air outlet 511. At this time, the air outlet 511 is connected to the air inlet chamber 503. The gas inside the airbag 13 is transported to the air collection channel 1402 of the scraper 14 through the air inlet chamber 503 and the air outlet 511, and then sprayed onto the saw blade 4 through the air outlet channel 1403. The amount of gas released by the airbag 13 per unit time needs to be matched with the inflation amount to ensure the stability of the air pressure, thereby ensuring the stability of the scraper 14. When the guide wheel 3 stops rotating, the impeller 7 stops inflating the airbag 13. When the air pressure inside the airbag 13 is lower than the threshold, it cannot overcome the elastic force of the spring 507 and the atmospheric pressure. The spring 507 resets and pushes the sliding ring 504 down. The first sealing ring 508 blocks the air passage between the air inlet chamber 503 and the air outlet 511. At this time, the exhaust valve 12 is opened to further reduce the air pressure inside the airbag 13 until it cannot overcome the elastic force of the elastic part 16. The elastic part 16 resets and the scraper 14 returns to its original position. The working end 1401 of the scraper 14 is disengaged from the saw blade 4.

[0052] In this embodiment, the adjusting block 506 is used to adjust the initial compression of the spring 507, thereby adjusting the internal air pressure threshold of the airbag 13. The greater the initial compression of the spring 507, the greater the pressure required for subsequent air pressure to overcome the elasticity of the spring 507. The upper end of the upright 505 passes through the adjusting block 506, with a gap between them to allow communication with the atmosphere. The adjusting block 506 is threadedly connected to the sleeve 502. The adjusting block 506 has an external thread in its circumference, and the upper part of the inner wall of the sleeve 502 has an internal thread that matches the external thread. When the adjusting block 506 is rotated, the adjusting block 506 can move up and down relative to the sleeve 502, thereby adjusting the degree of compression of the spring 507. The adjusting block 506 and the upright 505 can rotate relative to each other. The second sealing ring 509 is used to seal the gap between the inner wall of the sliding ring 504 and the upright 505, and the limiting block 510 is used to limit the downward displacement range of the sliding ring 504.

[0053] Furthermore, a notch 17 is provided on the side wall of the fixed base 1 for the scraper 14 to pass through, and the width of the notch 17 is greater than the thickness of the scraper 14.

[0054] Specifically, the notch 17 is for the passage of the scraper 14 and for the scraper 14 to rotate within a certain range, that is, to rotate until it contacts or separates from the saw blade 4. The width of the scraper 14 is greater than the thickness of the scraper 14. When the scraper 14 rotates to contact the saw blade 4, the scraper 14 just contacts the lower side wall of the notch 17. After the scraper 14 separates from the side wall of the saw blade 4, it just contacts the upper side wall of the notch 17.

[0055] Furthermore, the elastic part 16 is an elastic sheet, which is V-shaped. The included angle of the elastic sheet is adapted to the tilt angle of the scraper 14. One side of the elastic sheet acts on the bottom surface of the scraper 14, and the other side acts on the inner wall of the assembly cavity 18.

[0056] Specifically, the elastic part 16 is a V-shape formed by bending a metal elastic sheet. The lower side of the elastic sheet can be bonded to the inner wall of the assembly cavity 18, and the upper side can be bonded to the side wall of the scraper 14. The bonding point should avoid the location of the hose connecting to the air collection channel 1402. The opening of the elastic part 16 faces the saw blade 4. One side of the elastic sheet acts on the bottom surface of the scraper 14, and the other side acts on the inner wall of the assembly cavity 18. When the scraper 14 is pressed and rotated, it can squeeze the elastic sheet. After the pressure is released, the elastic sheet rebounds and drives the scraper 14 to separate from the side wall of the saw blade 4.

[0057] The working principle of this invention is as follows: During operation, the saw blade 4 moves at high speed, driving the guide wheel 3 to rotate. The guide wheel 3 drives the impeller 7 below to rotate. The impeller 7 delivers air to the air bladder 13 through the volute 6. The air bladder 13 inflates and expands. When the internal air pressure of the air bladder 13 reaches a certain value, it overcomes the elastic force of the elastic part 16 and begins to squeeze the scraper 14. The scraper 14 rotates to one side of the saw blade 4 and compresses the elastic part 16 until the working end 1401 of the scraper 14 touches the side wall of the saw blade 4. As the saw blade 4 moves, the scraper 14 scrapes the saw chips on the saw blade 4. At the same time, the liquid (usually coolant) sprayed by the nozzle 15 can wash away the saw chips attached to the scraper 14, improving the scraping effect of the scraper 14. As the guide wheel 3 continues to rotate, the airbag 13 is continuously inflated. When the internal air pressure exceeds the set threshold, the regulating component opens the air passage between the air outlet 511 and the air inlet chamber 503. The excess gas in the airbag 13 is transported to the air outlet channel 1403 inside the scraper 14. The gas further blows the side wall of the saw band 4, improving the cleaning effect. After the saw band 4 stops moving, the impeller 7 stops inflating the airbag 13. When the air pressure of the airbag 13 is lower than the threshold, the pressure regulating component blocks the air passage between the air outlet 511 and the air inlet chamber 503, and at the same time opens the exhaust valve 12 to further reduce the air pressure of the airbag 13. When the air pressure can no longer overcome the elastic force of the elastic part 16, the elastic part 16 resets and pushes the scraper 14 to rotate in the opposite direction by a certain angle, so that the working end 1401 of the scraper 14 is separated from the side wall of the saw band 4. This prevents the scraper 14 from being under stress all the time, making it less prone to bending and deformation, and improving the service life of the scraper 14.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Based on the technical essence of the present invention, any simple modifications, equivalent substitutions, and improvements made to the above embodiments within the spirit and principles of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A band saw for cutting copper rods, comprising a machine body, a saw blade (4) rotatably mounted on the machine body, and guide rods (2) mounted on the machine body. Along the forward direction of the saw blade (4), the guide rods (2) are distributed on the entry and exit sides of the saw blade (4). The lower end of the guide rods (2) is rotatably provided with guide wheels (3) for guiding the saw blade (4). The saw blade (4) passes between two opposing guide wheels (3). The band saw is characterized in that... The guide rod (2) is provided with a fixed seat (1) located in front of the guide wheel (3). The fixed seats (1) are symmetrically distributed on both sides of the saw blade (4). The fixed seat (1) has an assembly cavity (18) inside. A scraper (14) is rotatably provided in the assembly cavity (18). The working end (1401) of the scraper (14) passes through the side wall of the assembly cavity (18) and is adjacent to the saw blade (4) but does not contact it. The fixed seat (1) is provided with a nozzle (15) that sprays liquid toward the working end (1401) of the scraper (14). It also includes a top pressing mechanism that relies on the forward movement of the saw blade (4) to drive the guide wheel (3) to rotate and generate pressure so that the working end (1401) of the scraper (14) abuts against the side wall of the saw blade (4) to scrape the saw chips on the side wall of the saw blade (4). An elastic part (16) is provided on the lower side of the scraper (14). The pressing mechanism includes a power unit and an execution unit that applies pressure to the scraper (14). The execution unit presses the scraper (14) and squeezes the elastic part (16). The power unit provides pressure to the execution unit. The power unit is connected to the guide wheel (3). The saw blade (4) moves forward, driving the guide wheel (3) to rotate, thereby providing driving force to the power unit. The power unit is an impeller (7), which is connected to the lower end of the shaft (11) of the guide wheel (3). A volute (6) is provided on the outside of the impeller (7). The actuator is an airbag (13), which is located on the upper side of the scraper (14). The airbag (13) is connected to the air outlet of the volute (6). An air mesh plate (8) is provided on the bottom surface of the volute (6). An exhaust valve (12) located on the fixed seat (1) is connected to the airbag (13). When the exhaust valve (12) is opened, the elastic part (16) drives the scraper (14) to reset so that the working end (1401) of the scraper (14) is separated from the side wall of the saw blade (4). The guide wheel (3) rotates and drives the impeller (7) to rotate to inflate the airbag (13). The airbag (13) inflates and squeezes the scraper (14) so ​​that the working end (1401) of the scraper (14) abuts against the side wall of the saw blade (4).

2. A band saw for cutting copper rods according to claim 1, characterized in that, The mounting cavity (18) of the fixed base (1) is provided with a pressure regulating part (5) on its side wall. The scraper (14) is provided with an air outlet channel (1403). The outlet of the air outlet channel (1403) faces the side wall of the saw blade (4). The pressure regulating part (5) includes a base (501) and a sleeve (502) connected to the top of the base (501). The base (501) is provided with an air inlet chamber (503) connected to the airbag (13). The side wall of the sleeve (502) is provided with an air outlet (511) connected to the air outlet channel (1403). The air inlet chamber (503) and the air outlet (511) are connected by a pressure regulating component for adjusting the air pressure inside the airbag (13).

3. A band saw for cutting copper rods according to claim 2, characterized in that, The air outlet channels (1403) are distributed at intervals along the width direction of the scraper (14). The inlets of the multiple air outlet channels (1403) are connected to the air collection channels (1402) in the scraper (14). The air collection channels (1402) and the air outlet (511) are connected by a flexible hose.

4. A band saw for cutting copper rods according to claim 2, characterized in that, The pressure regulating assembly includes a sliding ring (504), a vertical rod (505), an adjusting block (506), and a spring (507). The sliding ring (504) is adapted to the inner cavity of the sleeve (502). The sliding ring (504) is located below the air outlet (511). The lower end of the vertical rod (505) passes through the sliding ring (504) and is connected to the bottom wall of the air inlet chamber (503). The upper end passes through the adjusting block (506). The adjusting block (506) is threadedly connected to the inner wall of the sleeve (502). One end of the spring (507) acts on the adjusting block (506), and the other end acts on the sliding ring (504). Under the action of the air pressure inside the air inlet chamber (503), the sliding ring (504) can slide relative to the vertical rod (505) and the sleeve (502).

5. A band saw for cutting copper rods according to claim 4, characterized in that, The outer wall of the sliding ring (504) is axially embedded with a first sealing ring (508), and the inner wall of the sliding ring (504) is circumferentially embedded with a second sealing ring (509).

6. A band saw for cutting copper rods according to claim 5, characterized in that, The sliding ring (504) is provided with a limiting block (510) below it, which is connected to the inner wall of the sleeve (502).

7. A band saw for cutting copper rods according to claim 1, characterized in that, The side wall of the fixed seat (1) is provided with a notch (17) for the scraper (14) to pass through, and the width of the notch (17) is greater than the thickness of the scraper (14).

8. A band saw for cutting copper rods according to claim 1, characterized in that, The elastic part (16) is an elastic sheet. The elastic sheet is V-shaped. The included angle of the elastic sheet is adapted to the tilt angle of the scraper (14). One side of the elastic sheet acts on the bottom surface of the scraper (14), and the other side acts on the inner wall of the assembly cavity (18).

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