A tooth groove grinding machine for band saw blade production

Abstract

The application relates to the technical field of sawing machining, and discloses a tooth groove grinding machine bed for band saw blade production, which comprises a supporting seat, a supporting plate is slidably installed at the top of the supporting seat, and a bearing plate for bearing a band saw blade is fixedly installed at the top of the supporting plate. In the process of the supporting plate and the band saw blade advancing, the flow of hydraulic medium in the cylinder body rodless cavity and the auxiliary conveying pipe drives the push plate to continuously move to compensate for the missing displacement when the auxiliary cam is worn, so that the corresponding teeth on the band saw blade can be normally polished by the grinding wheel, the probability of the polishing depth being reduced due to the position deviation of the tooth groove is reduced, and under the action of the pulling force of the auxiliary tension spring and the spring elasticity, the worker needs to stop the machine to replace the band saw blade and simultaneously maintain and replace the auxiliary cam after the current band saw blade is polished, so that the polishing quality of the band saw blade is ensured, the continuity of the tooth groove grinding is ensured, the machine does not need to be immediately stopped for replacing the auxiliary cam in the middle, and the polishing efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of sawing technology, and in particular to a tooth groove grinding machine tool for band saw blade production. Background Technology

[0002] During the production and processing of band saw blades, the tooth grooves need to be ground with a grinding wheel to ensure that the tooth shape meets the standard and the tooth blocks are sharp enough.

[0003] like Figure 1 As shown, when grinding the tooth grooves on the band saw blade, the band saw blade to be ground is mounted on the support plate 3, and a grinding wheel is provided on the side of the support plate 3 near the saw blade. During grinding, the drive source drives the rotating shaft 5, the main cam 6, and the auxiliary cam 7 to rotate. When the main cam 6 rotates, it pushes the push rod 4, which is hinged to the support plate 3, to deflect by squeezing the push rod 4. This causes the end of the push rod 4 away from the main cam 6 to engage with the tooth grooves of the band saw blade to push the band saw blade to move. At the same time, the auxiliary cam 7 squeezes the limit post 9. The support plate 2, bearing plate 3, and band saw blade are first moved towards the grinding wheel, and then moved back to their original positions under the action of the main tension spring 11. Then, through the coordinated cooperation of the main cam 6 and the auxiliary cam 7, the band saw blade moves back and forth along its length direction and along the direction of the support plate 2. This allows the band saw blade to move normally away from the grinding wheel after the current tooth groove is ground, without interference from the grinding wheel. Ultimately, the band saw blade is ground while moving along its length direction, achieving automatic grinding without manual operation.

[0004] When the support plate 2, the bearing plate 3, and the band saw blade move towards the grinding wheel under the action of the secondary cam 7, the grinding depth of the grinding wheel on the tooth groove is also small due to the small thickness of the band saw blade. This results in high movement accuracy of the support plate 2, the bearing plate 3, and the band saw blade. Even a slight deviation may lead to over-grinding or insufficient grinding depth of the tooth groove. When the main cam 6 and the secondary cam 7 rotate synchronously, the main cam 6 only needs to overcome the friction between the band saw blade and the bearing plate 3 through the push rod 4, while the secondary cam 7 needs to overcome the friction from all the structures on the support plate 2 and the bearing plate 3. This causes the wear rate of the secondary cam 7 to be significantly greater than that of the main cam 6 during operation. When the secondary cam 7 wears, the support plate 2, the bearing plate 3, and the band saw blade cannot move to the target position, resulting in insufficient grinding depth of the grinding wheel on the tooth groove. This leads to a decrease in the sharpness of the saw blade, an increase in cutting resistance, and affects the grinding quality. Summary of the Invention

[0005] This application proposes a tooth groove grinding machine for band saw blade production. During the band saw blade grinding process, if the secondary cam wears and causes the band saw blade to fail to move to the target position, the flow of hydraulic medium in the rodless chamber of the cylinder and the secondary delivery pipe drives the push plate to continuously move to compensate for the missing displacement. This ensures that the corresponding tooth grooves on the band saw blade can be properly ground by the grinding wheel, reducing the probability of reduced grinding depth due to positional deviation. Simultaneously, under the action of the secondary tension spring and spring force, the machine only needs to be stopped to replace the band saw blade and repair or replace the secondary cam after the current band saw blade grinding is completed. This ensures both the quality of band saw blade grinding and the continuity of tooth groove grinding, eliminating the need for immediate machine stoppage and secondary cam replacement, thus improving grinding efficiency. This addresses the problem of reduced grinding accuracy and impacted production quality caused by cam wear during the grinding of the tooth grooves as the band saw blade travels along its length and reciprocates towards the grinding wheel.

[0006] To achieve the above objectives, this application adopts the following technical solution: a tooth groove grinding machine for band saw blade production, comprising a support base, a support plate slidably mounted on the top of the support base, a support plate for supporting the band saw blade fixedly mounted on the top of the support plate, a secondary cam rotatably mounted on the side of the support plate away from the support plate for driving the support plate, the support plate, and the band saw blade to move, a hydraulic cylinder fixedly mounted on the top of the support base by bolts, a push plate fixedly mounted on the telescopic end of the hydraulic cylinder, a reversing valve provided on one side of the hydraulic cylinder, and the reversing valve being drively connected to the push plate, and a limit baffle fixedly mounted on the top of the support base by bolts for monitoring whether the support plate has moved to the desired position. At the target position, a sliding plate is fixedly installed at the bottom of the support plate, and the sliding plate is placed between the push plate and the limit baffle. The limit baffle is connected to the reversing valve. When the secondary cam is not worn and the support plate, the bearing plate and the band saw blade move normally to the target position, the transmission connection between the reversing valve and the hydraulic cylinder is disconnected, and the output end of the hydraulic cylinder will not apply force to the sliding plate. When the secondary cam is worn due to long-term operation, causing the support plate, the bearing plate and the band saw blade to not move to the target position, the transmission connection between the reversing valve and the hydraulic cylinder is delayed due to the transmission connection between the limit baffle and the reversing valve, thereby causing the output end of the hydraulic cylinder to apply force to the sliding plate, causing the support plate, the bearing plate and the band saw blade to move to the target position.

[0007] Furthermore, a rotating shaft is rotatably mounted on the side of the support plate near the secondary cam, the secondary cam is fixedly fitted on the outer side of the bottom end of the rotating shaft, a limiting seat is fixedly mounted on the top of the support seat, and a limiting post adapted to the secondary cam is rotatably mounted on the end of the limiting seat near the rotating shaft.

[0008] Furthermore, two sliding columns are symmetrically fixedly installed on the top of the support base, and two sets of sliding plates are provided. The sliding plates of the same set are slidably fitted on the outside of the corresponding sliding column to slide and connect with the sliding column.

[0009] Furthermore, the hydraulic cylinder has a hydraulic chamber inside, and a piston is airtightly slidably installed inside the hydraulic chamber. A hydraulic rod is fixedly installed at the end of the piston away from the limiting seat. The end of the hydraulic rod away from the piston slides through the side wall of the hydraulic cylinder and is fixedly connected to the push plate. Both ends of the push plate are slidably fitted on the outside of the corresponding sliding column.

[0010] Furthermore, the outlet of the reversing valve is fixedly connected to the rodless chamber of the hydraulic cylinder through the main delivery pipe, the reversing valve is provided with an inlet, and the inlet is fixedly connected to the outlet of the liquid pump through a connecting pipe, the reversing valve is provided with a return port, and the return port is fixedly connected to the storage tank through a connecting pipe.

[0011] Furthermore, a cylinder is fixedly installed on the side of the limiting baffle near the slide plate, and a piston rod is airtightly slidably installed on the side of the cylinder near the slide plate. The rodless chamber of the cylinder is fixedly connected to the hydraulic control port of the reversing valve through the auxiliary delivery pipe, and the rodless chamber of the cylinder and the auxiliary delivery pipe are filled with hydraulic medium.

[0012] Furthermore, a spring is fixedly installed in the rodless cavity of the cylinder, and the two ends of the spring are fixedly connected to the inner side wall of the cylinder and the piston rod, respectively, to assist the piston rod in resetting.

[0013] Furthermore, a secondary tension spring is fixedly installed in the rodless chamber of the hydraulic cylinder. The two ends of the secondary tension spring are fixedly connected to the inner wall of the hydraulic cylinder and the piston, respectively, to assist the piston in resetting.

[0014] The beneficial effects of this invention are as follows: This application provides a tooth groove grinding machine for band saw blade production. While the auxiliary cam and limit post work together to drive the support plate, bearing plate, and band saw blade to reciprocate along the axis of the sliding column, when the auxiliary cam wears due to prolonged operation, the hydraulic medium in the rodless chamber of the cylinder and the auxiliary delivery pipe allows hydraulic oil to continuously enter the rodless chamber of the hydraulic cylinder through the main delivery pipe. This squeezes the piston and push plate until the sliding plate and limit baffle are in contact, compensating for the wear of the auxiliary cam. This ensures that the corresponding tooth grooves on the band saw blade can be properly ground by the grinding wheel, reducing the probability of reduced grinding depth due to positional deviation. Simultaneously, under the action of the auxiliary tension spring and spring force, the push plate and piston rod return to their normal positions, preparing for subsequent displacement compensation. After the current band saw blade is ground, the worker stops the machine to replace the band saw blade and simultaneously repairs and replaces the auxiliary cam. This ensures both the quality of band saw blade grinding and the continuity of tooth groove grinding, eliminating the need for immediate machine stoppage to replace the auxiliary cam and improving grinding efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the bearing plate and push rod of the present invention; Figure 3 This is a schematic diagram of the structure of the support base, support plate and main tension spring of the present invention; Figure 4 This is a schematic diagram of the structure of the support base, sliding column, and hydraulic cylinder of the present invention; Figure 5 This is a bottom view of the support plate and sliding plate structure of the present invention; Figure 6 This is a top cross-sectional view of the hydraulic cylinder of the present invention; Figure 7 This is a side view cross-sectional structural diagram of the limiting baffle of the present invention.

[0016] In the diagram: 1. Support seat; 2. Support plate; 3. Bearing plate; 4. Push rod; 5. Rotating shaft; 6. Main cam; 7. Secondary cam; 8. Limit seat; 9. Limit post; 10. Limit plate; 11. Main tension spring; 12. Sliding column; 13. Slide plate; 14. Limit baffle; 15. Hydraulic cylinder; 16. Push plate; 17. Hydraulic chamber; 18. Piston; 19. Hydraulic rod; 20. Reversing valve; 201. Inlet; 202. Return port; 21. Main delivery pipe; 22. Cylinder body; 23. Piston rod; 24. Secondary delivery pipe; 25. Spring; 26. Secondary tension spring. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] See Figures 1 to 7A band saw blade tooth groove grinding machine includes a support base 1. Two sliding columns 12 are symmetrically fixedly mounted on the top of the support base 1. A support plate 2 is positioned above the sliding columns 12. A grinding wheel is mounted on the support base 1 and placed on one side of the support plate 2. Two pairs of sliding plates 13 are symmetrically fixedly mounted on the bottom of the support plate 2, and the two pairs of sliding plates 13 are respectively limited and slidably connected to the corresponding sliding columns 12. A bearing plate 3 is fixedly mounted on the top of the support plate 2. The side of the bearing plate 3 closest to the grinding wheel is used to mount the band saw blade to be ground. A push rod 4 is hinged to the bottom of one side of the bearing plate 3. The end of the push rod 4 closest to the band saw blade moves the band saw blade along its length direction by engaging with the tooth grooves of the band saw blade. A rotating shaft 5 is rotatably mounted on the side of the support plate 2 away from the grinding wheel. The outer side of the top of the rotating shaft 5... A main cam 6 is fixedly mounted, and a secondary cam 7 is fixedly mounted on the outer side of the bottom end of the rotating shaft 5. When the rotating shaft 5, main cam 6 and secondary cam 7 are rotated by the drive source, the main cam 6 presses the end of the push rod 4 near the main cam 6, causing the push rod 4, which is hinged on the bearing plate 3, to deflect. This causes the end of the push rod 4 near the grinding wheel to contact the band saw blade and push the band saw blade forward. A limit seat 8 is fixedly mounted on the side of the support base 1 near the rotating shaft 5. A limit post 9 that cooperates with the secondary cam 7 is rotatably mounted on the end of the limit seat 8 near the rotating shaft 5. A limit plate 10 is fixedly mounted on the end of the limit seat 8 away from the limit post 9. Two main tension springs 11 are symmetrically fixedly mounted on the side of the limit plate 10 near the support plate 2. The end of the main tension spring 11 away from the limit plate 10 is fixedly connected to the support plate 2.

[0019] When grinding the tooth grooves of the band saw blade, the band saw blade is mounted on the support plate 3 near the grinding wheel, with the tooth blocks facing the grinding wheel. The drive source drives the rotating shaft 5, the main cam 6, and the auxiliary cam 7 to rotate. The main cam 6 presses against the end of the push rod 4 near the main cam 6, causing the push rod 4, which is hinged to the support plate 3, to deflect. This causes the end of the push rod 4 near the grinding wheel to contact the band saw blade and push the band saw blade forward. The main tension spring 11 is stretched. At the same time, the auxiliary cam 7 rotates and comes into contact with the limiting post 9. When the curved profile of the auxiliary cam 7 rotates to the limiting post 9, the auxiliary cam 7, influenced by the curved profile of the protruding part of the auxiliary cam 7, can drive the support plate 2, the support plate 3, and the band saw through the rotating shaft 5. The band saw blade gradually moves away from the limiting post 9 along the axis of the sliding post 12, that is, towards the grinding wheel. After the curved contour of the protruding part rotates away, the support plate 2, the bearing plate 3 and the band saw blade gradually move towards the limiting plate 10 and reset under the action of the elastic force of the main tension spring 11. Then, through the coordinated cooperation of the main cam 6, the secondary cam 7 and the main tension spring 11, the band saw blade achieves the purpose of moving along its length direction and moving back and forth along the direction of the support plate 2. This allows the band saw blade to move normally away after the current tooth groove is ground by the grinding wheel without being interfered with by the grinding wheel. Finally, the purpose of the band saw blade moving along its length direction and being ground is achieved, realizing automatic grinding without the need for manual operation to drive the band saw blade to move.

[0020] A limiting baffle 14 is fixedly installed on the top of the support base 1 by bolts. The limiting baffle 14 is slidably fitted on the outside of one of the sliding columns 12 and is placed between the two sliding plates 13. When the support plate 2 drives the bearing plate 3 and the band saw blade to move back and forth, the band saw blade model remains unchanged, that is, its tooth groove depth remains unchanged. The distance that the support plate 2, the bearing plate 3 and the band saw blade move along the axis of the sliding column 12 also remains unchanged. Therefore, the limiting baffle 14 is fixedly installed with bolts at a position that can fit with the sliding plate 13 according to the moving distance of the sliding plate 13. After the support plate 2 and the sliding plate 13 move to the target position under the action of the secondary cam 7, one of the sliding plates 13 near the rotating shaft 5 just fits with the limiting baffle 14.

[0021] A hydraulic cylinder 15 is fixedly installed on the top of the support base 1 by bolts, and the hydraulic cylinder 15 is placed on the side of the slide column 12 near the limiting plate 10. The hydraulic cylinder 15 has a hydraulic chamber 17 inside, and a piston 18 is airtightly slidably installed inside the hydraulic chamber 17. A hydraulic rod 19 is fixedly installed on the end of the piston 18 away from the limiting plate 10. The end of the hydraulic rod 19 away from the piston 18 slides through the side wall of the hydraulic cylinder 15 and is fixedly installed with a push plate 16. Both ends of the push plate 16 are slidably fitted on the outside of the corresponding slide column 12, and the push plate 16 is placed on the side of the slide plate 13 away from the limiting plate 14 during the movement. That is, the slide plate 13 is placed between the push plate 16 and the limiting plate 14. A secondary tension spring 26 is fixedly installed in the rodless chamber of the hydraulic cylinder 15. The two ends of the secondary tension spring 26 are fixedly connected to the inner side wall of the hydraulic cylinder 15 and the piston 18, respectively.

[0022] The rodless chamber of hydraulic cavity 17 is filled with hydraulic medium, which is hydraulic oil in this embodiment. A directional valve 20 is fixedly installed on one side of hydraulic cylinder 15. The directional valve 20 is a two-position three-way valve. The outlet of the directional valve 20 is fixedly connected to the rodless chamber of hydraulic cylinder 15 through the main delivery pipe 21. The inlet 201 of the directional valve 20 is fixedly connected to the outlet of the hydraulic pump through a connecting pipe. The delivery port of the hydraulic pump is fixedly connected to the oil storage tank through a connecting pipe. The return port 202 of the directional valve 20 is fixedly connected to the oil storage tank through a connecting pipe. In the initial state, the valve core inside the directional valve 20 is under the action of the elastic element. This connects the outlet of the reversing valve 20 to the inlet 201, while the outlet and return port 202 of the reversing valve 20 are not connected. When the support plate 2 and the slide plate 13 move toward the grinding wheel along the axis of the slide column 12 under the action of the auxiliary cam 7, the hydraulic oil in the oil tank is delivered to the rodless chamber of the hydraulic chamber 17 through the inlet 201 of the reversing valve 20 and the main delivery pipe 21 by the hydraulic pump. Then, the piston 18 drives the hydraulic rod 19 and the push plate 16 to slide synchronously. When the push plate 16 slides, it remains in contact with the slide plate 13 but does not apply force to the slide plate 13.

[0023] A cylinder body 22 is fixedly installed on the side of the limit baffle 14 near the slide plate 13, and a piston rod 23 is airtightly slidably installed on the side of the cylinder body 22 near the slide plate 13. The rodless chamber of the cylinder body 22 is fixedly connected to the hydraulic control port of the directional valve 20 through the auxiliary delivery pipe 24, and the rodless chamber of the cylinder body 22 and the auxiliary delivery pipe 24 are filled with hydraulic medium. The hydraulic control port is used on the directional valve 20 for transmission connection with the internal elastic element of the directional valve 20. When the elastic element inside the directional valve 20 is deformed by force, it will drive the valve core to move synchronously, thereby... The connection state between the outlet, inlet 201 and return port 202 of the directional valve 20 is changed by the position change of the valve core. A spring 25 is fixedly installed in the rodless cavity of the cylinder 22. The two ends of the spring 25 are fixedly connected to the inner side wall of the cylinder 22 and the piston rod 23, respectively. When the support plate 2 and the slide plate 13 are placed in the initial position under the tension of the main tension spring 11, the slide plate 13 between the limit baffle 14 and the push plate 16 is in contact with the end of the piston rod 23 away from the limit baffle 14 under the elastic force of the spring 25.

[0024] When the hydraulic rod 19 and push plate 16 move towards the limit baffle 14 under the action of hydraulic oil, the support plate 2 and slide plate 13 also move towards the grinding wheel under the action of the auxiliary cam 7. The hydraulic medium in the auxiliary delivery pipe 24 is squeezed towards the hydraulic control port of the reversing valve 20 by the squeezing of the piston rod 23 by the slide plate 13, thereby causing the elastic element inside the reversing valve 20 to deform and the valve core to gradually move. When the valve core moves, it gradually releases the blockage between the outlet and inlet 201 of the reversing valve 20, so that the outlet and inlet 201 of the reversing valve 20 are connected. When the slide plate 13 moves to fit against the limit baffle 14, that is, when the band saw blade on the bearing plate 3 moves to the target position, the outlet and inlet of the reversing valve 20 are connected. When the space between 201 and 202 is blocked, the hydraulic oil cannot continue to enter the reversing valve 20. At this time, the piston 18, hydraulic rod 19 and push plate 16 also move to the target position. Subsequently, when the support plate 2, bearing plate 3 and band saw blade are reset under the action of the main tension spring 11, the hydraulic oil in the rodless chamber of the hydraulic cylinder 15 flows to the oil tank through the main delivery pipe 21 and the return port 202 under the action of the auxiliary tension spring 26 and the elastic force of the spring 25. This causes the piston 18, hydraulic rod 19 and push plate 16 to move in the opposite direction and reset. The piston rod 23 also moves in the opposite direction and resets. The hydraulic medium that was originally squeezed and flowed into the hydraulic control port of the reversing valve 20 through the auxiliary delivery pipe 24 in the rodless chamber of the cylinder body 22 also flows back into the rodless chamber of the cylinder body 22 under the action of the elastic element inside the reversing valve 20.

[0025] When the secondary cam 7 wears down due to prolonged operation, the support plate 2, bearing plate 3, and band saw blade cannot move to the target position under the action of the secondary cam 7. The slide plate 13 does not fit with the limit baffle 14, resulting in the hydraulic medium in the rodless chamber of the cylinder 22 not flowing completely into the hydraulic control port of the directional valve 20 through the secondary delivery pipe 24. The pressure on the elastic element inside the directional valve 20 is less than the pressure of the valve core switching position. That is, at this time, the inlet port 201 is still connected to the outlet port of the directional valve 20, and the hydraulic oil can still enter the rodless chamber of the hydraulic cylinder 15 through the main delivery pipe 21, thereby continuing to squeeze the piston 18. This causes the hydraulic rod 19 to apply force to the slide plate 13 through the push plate 16 until the slide plate 13 fits with the limit baffle 14. This compensates for the wear of the secondary cam 7 when the band saw blade fails to move to the target position due to wear, so that the band saw blade can move to the target position. The corresponding tooth grooves can be normally ground by the grinding wheel, reducing the probability of reduced grinding depth due to positional deviation. After the slide plate 13 and the limit baffle 14 are in contact, the hydraulic oil in the rodless chamber of the hydraulic cylinder 15 flows normally to the oil tank through the main delivery pipe 21 and the return port 202. The hydraulic medium that was originally squeezed and flowed into the hydraulic control port of the reversing valve 20 through the auxiliary delivery pipe 24 in the rodless chamber of the cylinder body 22 also flows back into the rodless chamber of the cylinder body 22 under the action of the elastic element inside the reversing valve 20. This allows the push plate 16 and the piston rod 23 to be reset normally, preparing for subsequent displacement compensation. Until the current band saw blade is ground, the worker stops the machine to replace the band saw blade and repairs and replaces the auxiliary cam 7. This ensures the continuity of tooth groove grinding while ensuring the quality of band saw blade grinding, without having to stop the machine immediately to replace the auxiliary cam 7, thus improving grinding efficiency.

[0026] Working principle: When grinding the tooth grooves of the band saw blade, the band saw blade is mounted on the support plate 3 near the grinding wheel, with the tooth surface facing the grinding wheel. The drive source drives the rotating shaft 5, the main cam 6, and the auxiliary cam 7 to rotate. The main cam 6 presses against the end of the push rod 4 near the main cam 6, causing the push rod 4, which is hinged to the support plate 3, to deflect. This causes the end of the push rod 4 near the grinding wheel to contact the band saw blade and push the band saw blade forward. The main tension spring 11 is stretched. At the same time, the auxiliary cam 7 rotates and comes into contact with the limiting post 9. Affected by the curved contour of the protruding part of the auxiliary cam 7, the auxiliary cam 7 can drive the support plate 2, the support plate 3, and the band saw blade along the axis of the sliding column 12 through the rotating shaft 5. The band saw blade moves gradually away from the limiting post 9, that is, towards the grinding wheel. After the curved contour of the protruding part rotates and moves away, the support plate 2, the bearing plate 3 and the band saw blade gradually move towards the limiting plate 10 and reset under the action of the main tension spring 11. Then, through the coordinated cooperation of the main cam 6, the secondary cam 7 and the main tension spring 11, the band saw blade achieves the purpose of moving along its length direction and moving back and forth along the direction of the support plate 2. This allows the band saw blade to move normally away after the current tooth groove is ground by the grinding wheel without being interfered with by the grinding wheel. Finally, the purpose of the band saw blade moving along its length direction and being ground is achieved, realizing automatic grinding without the need for manual operation to drive the band saw blade to move. In the initial state, before the curved contour of the protruding part of the secondary cam 7 rotates to fit against the limiting post 9, each slide plate 13 is also in its initial position. At this time, under the action of the tension spring 26, the push plate 16 fits against the corresponding slide plate 13. Under the action of the spring 25, the slide plate 13 between the limiting baffle 14 and the push plate 16 fits against the end of the piston rod 23 away from the limiting baffle 14. Under the action of the elastic element, the valve core inside the reversing valve 20 connects the liquid outlet of the reversing valve 20 with the liquid inlet 201, while the liquid outlet and the return port 202 of the reversing valve 20 are not in the same position. In the connected state, when the support plate 2 and slide plate 13 move towards the grinding wheel along the axis of the slide column 12 under the action of the auxiliary cam 7, the hydraulic oil in the oil tank is delivered to the rodless chamber of the hydraulic chamber 17 through the inlet 201 of the reversing valve 20 and the main delivery pipe 21 by the hydraulic pump. This, in turn, drives the hydraulic rod 19 and push plate 16 to slide synchronously via the piston 18. The push plate 16 remains in contact with the slide plate 13 but does not exert force on it. Simultaneously, the pressure exerted by the slide plate 13 on the piston rod 23 forces the hydraulic medium in the auxiliary delivery pipe 24 towards the hydraulic control port of the reversing valve 20. This causes the elastic element inside the directional valve 20 to deform, and the valve core gradually moves. As the valve core moves, it gradually releases the blockage between the outlet and inlet 201 of the directional valve 20, allowing the outlet and inlet 201 of the directional valve 20 to connect. When the slide plate 13 moves to engage with the limit baffle 14, that is, when the band saw blade on the bearing plate 3 moves to the target position, the hydraulic oil cannot continue to enter the directional valve 20 because the outlet and inlet 201 of the directional valve 20 are blocked. At this time, the piston 18, hydraulic rod 19, and push plate 16 also move to the target position. Subsequently, when When the support plate 2, bearing plate 3 and band saw blade are reset under the action of the main tension spring 11, under the action of the tension of the auxiliary tension spring 26 and the elasticity of the spring 25, the hydraulic oil in the rodless chamber of the hydraulic cylinder 15 flows to the oil tank through the main delivery pipe 21 and the return port 202, causing the piston 18, hydraulic rod 19 and push plate 16 to move in the opposite direction to reset. The piston rod 23 also moves in the opposite direction to reset. The hydraulic medium that was originally squeezed in the rodless chamber of the cylinder 22 and flowed into the hydraulic control port of the reversing valve 20 through the auxiliary delivery pipe 24 also flows back to the rodless chamber of the cylinder 22 under the action of the elastic element inside the reversing valve 20. When the secondary cam 7 wears down due to prolonged operation, the support plate 2, bearing plate 3, and band saw blade cannot move to the target position under the action of the secondary cam 7. The slide plate 13 does not fit with the limit baffle 14, resulting in the hydraulic medium in the rodless chamber of the cylinder 22 not flowing completely into the hydraulic control port of the directional valve 20 through the secondary delivery pipe 24. The pressure on the elastic element inside the directional valve 20 is less than the pressure of the valve core switching position. That is, at this time, the inlet port 201 is still connected to the outlet port of the directional valve 20, and the hydraulic oil can still enter the rodless chamber of the hydraulic cylinder 15 through the main delivery pipe 21, thereby continuing to squeeze the piston 18. This causes the hydraulic rod 19 to apply force to the slide plate 13 through the push plate 16 until the slide plate 13 fits with the limit baffle 14. This compensates for the wear of the secondary cam 7 when the band saw blade fails to move to the target position due to wear, so that the band saw blade can move to the target position. The corresponding tooth grooves can be normally ground by the grinding wheel, reducing the probability of reduced grinding depth due to positional deviation. After the slide plate 13 and the limit baffle 14 are in contact, the hydraulic oil in the rodless chamber of the hydraulic cylinder 15 flows normally to the oil tank through the main delivery pipe 21 and the return port 202. The hydraulic medium that was originally squeezed and flowed into the hydraulic control port of the reversing valve 20 through the auxiliary delivery pipe 24 in the rodless chamber of the cylinder body 22 also flows back into the rodless chamber of the cylinder body 22 under the action of the elastic element inside the reversing valve 20. This allows the push plate 16 and the piston rod 23 to be reset normally, preparing for subsequent displacement compensation. Until the current band saw blade is ground, the worker stops the machine to replace the band saw blade and repairs and replaces the auxiliary cam 7. This ensures the continuity of tooth groove grinding while ensuring the quality of band saw blade grinding, without having to stop the machine immediately to replace the auxiliary cam 7, thus improving grinding efficiency.

[0027] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tooth groove grinding machine for band saw blade production, comprising a support base (1), a support plate (2) slidably mounted on the top of the support base (1), a bearing plate (3) for supporting the band saw blade fixedly mounted on the top of the support plate (2), and a secondary cam (7) rotatably mounted on the side of the support plate (2) away from the bearing plate (3) for driving the support plate (2), the bearing plate (3), and the band saw blade to move, characterized in that, A hydraulic cylinder (15) is fixedly installed on the top of the support base (1) by bolts. A push plate (16) is fixedly installed on the telescopic end of the hydraulic cylinder (15). A reversing valve (20) is provided on one side of the hydraulic cylinder (15), and the reversing valve (20) is connected to the push plate (16) in a transmission connection. A limit baffle (14) is fixedly installed on the top of the support base (1) by bolts to monitor whether the support plate (2) has moved to the target position. Two sliding columns (12) are symmetrically fixedly installed on the top of the support base (1). A sliding plate (13) is fixedly installed on the bottom of the support plate (2), and the sliding plate (13) is placed between the push plate (16) and the limit baffle (14). The limit baffle (14) is connected to the reversing valve (20) in a transmission connection. A hydraulic chamber (17) is opened inside the hydraulic cylinder (15). The piston (18) is airtightly slidably installed inside the hydraulic chamber (17). A hydraulic rod (19) is fixedly installed at the end of the piston (18) away from the limit seat (8). The end of the hydraulic rod (19) away from the piston (18) slides through the side wall of the hydraulic cylinder (15) and is fixedly connected to the push plate (16). Both ends of the push plate (16) are slidably fitted on the outside of the corresponding slide column (12). A cylinder body (22) is fixedly installed on the side of the limit baffle (14) near the slide plate (13). A piston rod (23) is airtightly slidably installed on the side of the cylinder body (22) near the slide plate (13). The rodless chamber of the cylinder body (22) is fixedly connected to the hydraulic control port of the reversing valve (20) through the auxiliary delivery pipe (24). The rodless chamber of the cylinder body (22) and the auxiliary delivery pipe (24) are filled with hydraulic medium. When the secondary cam (7) is not worn and the support plate (2), bearing plate (3) and band saw blade move normally to the target position, the transmission connection between the reversing valve (20) and the hydraulic cylinder (15) is disconnected, and the output end of the hydraulic cylinder (15) will not exert force on the slide plate (13). When the secondary cam (7) is worn due to long-term operation, causing the support plate (2), bearing plate (3) and band saw blade to not move to the target position, the transmission connection between the reversing valve (20) and the hydraulic cylinder (15) is delayed through the transmission connection between the limit baffle (14) and the reversing valve (20), thereby causing the output end of the hydraulic cylinder (15) to exert force on the slide plate (13) so that the support plate (2), bearing plate (3) and band saw blade move to the target position.

2. The tooth groove grinding machine tool for band saw blade production according to claim 1, characterized in that, The support plate (2) has a rotating shaft (5) rotatably mounted on the side near the auxiliary cam (7). The auxiliary cam (7) is fixedly fitted on the outer side of the bottom end of the rotating shaft (5). The top of the support seat (1) is fixedly mounted with a limiting seat (8). The end of the limiting seat (8) near the rotating shaft (5) is rotatably mounted with a limiting post (9) that is compatible with the auxiliary cam (7).

3. A tooth groove grinding machine tool for band saw blade production according to claim 2, characterized in that, The slide plate (13) is provided in two sets. The slide plates (13) in the same set are slidably fitted on the outside of the corresponding slide column (12) to slide and connect with the slide column (12).

4. A tooth groove grinding machine tool for band saw blade production according to claim 3, characterized in that, The outlet of the reversing valve (20) is fixedly connected to the rodless chamber of the hydraulic cylinder (15) through the main delivery pipe (21). The reversing valve (20) is provided with an inlet (201), and the inlet (201) is fixedly connected to the outlet of the liquid pump through a connecting pipe. The reversing valve (20) is provided with a return port (202), and the return port (202) is fixedly connected to the storage tank through a connecting pipe.

5. A tooth groove grinding machine tool for band saw blade production according to claim 4, characterized in that, A spring (25) is fixedly installed in the rodless cavity of the cylinder (22). The two ends of the spring (25) are fixedly connected to the inner side wall of the cylinder (22) and the piston rod (23) respectively, and are used to assist the piston rod (23) in resetting.

6. A tooth groove grinding machine tool for band saw blade production according to claim 5, characterized in that, A secondary tension spring (26) is fixedly installed in the rodless cavity of the hydraulic cylinder (15). The two ends of the secondary tension spring (26) are fixedly connected to the inner wall of the hydraulic cylinder (15) and the piston (18) respectively, and are used to assist the piston (18) in resetting.

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