A stainless steel pipe making machine band sawing machine conformal sawing device and sawing method

Abstract

The present invention belongs to the technical field of band saws, and particularly relates to a conformal sawing device and a sawing method for a stainless steel pipe making machine band saw, comprising a base, on which a control unit and a clamping assembly are fixedly mounted, the clamping assembly fixedly clamps a stainless steel pipe, a lifting assembly is mounted on the top of the base, and two groups of symmetrically arranged conformal sawing assemblies are mounted on the lifting assembly. By arranging the conformal sawing assembly, the guide block always keeps in contact with the outer wall of the stainless steel pipe during the sawing descent process, which can maximize the stability of the saw blade during the sawing process, prevent the saw blade from shaking, improve the sawing effect, and reduce the production cost; by arranging the lifting assembly, the variable speed descent of the saw blade is achieved, and the sawing speed is improved while ensuring the sawing quality, the sawing blade utilization rate is maximized, and the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of band sawing machines, and in particular relates to a conformal sawing device and a sawing method for a band sawing machine for a stainless steel pipe making machine. Background Art

[0002] Band saws are machine tools used to saw various metal materials. They are divided into horizontal and vertical types according to their structure, and semi-automatic, fully automatic, and CNC according to their functions. Horizontal types can be divided into double-column and scissor types.

[0003] The guides of the band saws in the prior art are fixed, and the spacing is adjusted manually or hydraulically according to the width of the workpiece. The sawing process of complex workpieces must be slowed down, otherwise the life of the saw blade will be greatly shortened. At present, the society has overcapacity and the profit is getting lower and lower. In addition, the sawing speed needs to be continuously improved with the improvement of production technology. The original sawing method has low production efficiency and high production cost. Summary of the invention

[0004] The invention provides a conformal sawing device and a sawing method for a stainless steel pipe making machine band saw, wherein different cutting speeds are set during the sawing process to improve the sawing efficiency, a guide block is provided to automatically adjust the width, the wear of the band saw blade is reduced, and the life of the band saw blade is extended.

[0005] The technical solution of the present invention is realized as follows: a stainless steel pipe making machine band sawing machine form-conforming sawing device comprises a base, a control unit and a clamping assembly are fixedly mounted on the base, the clamping assembly fixedly clamps the stainless steel pipe, a lifting assembly is mounted on the top of the base, the lifting assembly comprises a first cylinder and a sliding support rod fixedly mounted on the top of the base, the piston rod of the first cylinder is fixedly mounted on a supporting crossbeam, the first cylinder drives the supporting crossbeam to rise and fall along the sliding support rod, a driving wheel and a driven wheel are symmetrically mounted on both sides of the supporting crossbeam, a saw blade is sleeved between the driving wheel and the driven wheel, the lifting assembly is also provided with a hydraulic adjustment unit, the clamping assembly also comprises a second cylinder, the second cylinder is communicated with the hydraulic adjustment unit, two groups of symmetrically arranged form-conforming sawing assemblies are mounted on the lifting assembly, the hydraulic adjustment unit is used to control the form-conforming sawing assembly to achieve variable speed descent during the descending sawing process, and the clamping assembly and the lifting assembly are both electrically connected to the control unit;

[0006] The conformable sawing assembly includes a connecting rod, which is fixedly connected to the lifting assembly. The connecting rod is slidably connected to a guide block, which is slidably connected to the saw blade. The guide block is kept in contact with the outer wall of the stainless steel pipe during the sawing process.

[0007] As a preferred embodiment, the clamping assembly includes a rib plate and a first clamping die fixedly mounted on the top of the base, the rib plate and the first clamping die are fixedly connected, a second clamping die opposite to the first clamping die is slidably mounted on the top of the base, the stainless steel pipe is fixedly clamped between the first clamping die and the second clamping die, the second cylinder is fixedly mounted on the sliding support rod, one end of the second clamping die away from the first clamping die is fixedly connected to the piston rod of the second cylinder, and the second cylinder can push the second clamping die to slide on the top of the base.

[0008] As a preferred embodiment, the side walls of the sliding support rod are fixedly installed with a first inductive proximity switch and a second inductive proximity switch in sequence from high to low. The first inductive proximity switch and the second inductive proximity switch are used to sense the position of the support beam. When the lower edge of the saw blade contacts the upper edge of the inner wall of the stainless steel pipe, the first inductive proximity switch senses the support beam and sends an electrical signal to the control unit. When the lower edge of the saw blade contacts the lower edge of the inner wall of the stainless steel pipe, the second inductive proximity switch senses the support beam and sends an electrical signal to the control unit.

[0009] As a preferred embodiment, the hydraulic regulating unit includes a main oil pipe and a subsidiary oil pipe, the main oil pipe is connected to a main regulating valve, the main regulating valve is connected to a reversing valve, one direction of the reversing valve is connected to a first oil return pipe, the other direction of the reversing valve is connected to an oil supply pipe, an oil pump is installed on the oil supply pipe, the subsidiary oil pipe is connected to a subsidiary regulating valve, the subsidiary regulating valve is connected to a solenoid valve, the solenoid valve is connected to a second oil return pipe, the oil supply pipe, the first oil return pipe and the second oil return pipe are all connected to a fuel tank

[0010] As a preferred embodiment, the conformable sawing assembly also includes a fixed frame, which is in a "concave" shape, and a sliding column is fixedly installed in the fixed frame. The connecting rod slides along the sliding column, and a spring is arranged on the sliding column between the connecting rod and the stainless steel pipe. The guide block is fixedly installed on the bottom of the fixed frame, and the spring pushes the fixed frame and the guide block to maintain contact with the outer wall of the stainless steel pipe during the sawing process through its own elastic force.

[0011] As a preferred embodiment, the form-following sawing component includes a fixed frame, which is in a "concave" shape. A servo motor is fixedly installed on the side of the fixed frame away from the stainless steel pipe. A threaded rod is rotatably installed in the fixed frame. The threaded rod is threadedly driven and connected to the connecting rod. The servo motor drives the threaded rod to rotate. A third inductive proximity switch is installed at one end of the guide block close to the stainless steel pipe. The third inductive proximity switch is electrically connected to the control unit. The third inductive proximity switch feeds back distance information to the control unit. The control unit controls the servo motor to drive the threaded rod to rotate to ensure that the guide block remains in contact with the outer wall of the stainless steel pipe during the sawing process.

[0012] As a preferred embodiment, the guide block includes a guide block body, and a first pulley and a second pulley are symmetrically arranged on both sides of the guide block body for rotation. The first pulley and the second pulley remain in contact with the outer wall of the stainless steel pipe during the sawing process. A through groove is opened at the bottom of the guide block body, and the saw blade slides through the through groove, and the saw blade remains in contact with the inner wall of the through groove.

[0013] The present invention also discloses a sawing method of a stainless steel pipe making machine band sawing machine conformal sawing device, comprising the following steps:

[0014] S1: placing a stainless steel pipe between a first clamping die and a second clamping die, and controlling a control unit to control a second cylinder to extend a piston rod and push the second clamping die to slide, thereby clamping the stainless steel pipe;

[0015] S2: The first cylinder remains in the extended state, and the control unit starts the belt motor to drive the driving wheel to rotate, which in turn drives the saw blade to rotate, and the saw blade drives the driven wheel to rotate;

[0016] S3: The control unit controls the hydraulic regulating unit to open the main regulating valve, open the reversing valve to connect the first oil return pipe, and close the auxiliary regulating valve, so that the hydraulic oil of the first cylinder flows into the oil tank through the main oil pipe and the first oil return pipe in sequence, and the piston rod of the first cylinder is slowly contracted, thereby driving the supporting beam to slowly descend;

[0017] S4: The saw blade slowly descends following the supporting crossbeam. When the lower edge of the saw blade contacts the upper edge of the stainless steel pipe, the saw blade starts to saw the stainless steel pipe and keeps slowly descending. During the descending sawing process, the conformal sawing assembly keeps in contact with the outer wall of the stainless steel pipe.

[0018] S5: When the lower edge of the saw blade contacts the upper edge of the inner wall of the stainless steel pipe, the first inductive proximity switch senses the supporting beam and feeds back an electrical signal to the control unit, and the control unit controls the hydraulic adjustment unit to open the auxiliary adjustment valve and the solenoid valve, so that the hydraulic oil of the first cylinder flows into the oil tank through the main oil pipe and the auxiliary oil pipe (378) at the same time, and the outflow speed of the hydraulic oil in the first cylinder becomes faster, so that the piston rod of the first cylinder can be quickly contracted, thereby driving the saw blade to descend quickly;

[0019] S6: When the lower edge of the saw blade contacts the lower edge of the inner wall of the stainless steel pipe, the second inductive proximity switch senses the supporting beam and feeds back an electrical signal to the control unit. The control unit controls the hydraulic regulating unit to close the auxiliary regulating valve and the solenoid valve, so that the hydraulic oil of the first cylinder flows into the oil tank only through the main oil pipe and the first return oil pipe. The outflow speed of the hydraulic oil in the first cylinder slows down, and the piston rod of the first cylinder is slowly contracted again, thereby driving the saw blade to keep slowly descending.

[0020] S7: After the stainless steel pipe is sawed, the first cylinder retracts all the piston rods, and the saw blade reaches the lowest position. The control unit controls the hydraulic adjustment unit to switch to the connected oil supply pipe, and then starts the oil pump to return the hydraulic oil in the oil tank to the first cylinder through the oil supply pipe and the main oil pipe. The piston rod of the first cylinder is extended, and then drives the supporting beam and the saw blade to rise to the initial position.

[0021] After adopting the above technical solution, the beneficial effects of the present invention are:

[0022] The present invention provides a conformal sawing assembly, and the distance between the two guide blocks changes with the sawing operation during the sawing descent process, that is, at the beginning of sawing, the sawing area is small and the distance between the two guide blocks is small, and as the sawing goes deeper, the distance between the two guide blocks also increases, which can ensure that the saw blade remains stable during the sawing process, prevent the saw blade from shaking, improve the sawing effect, obtain a smoother and more accurate sawing surface, and can extend the service life of the saw blade and reduce the production cost;

[0023] The present invention provides a lifting component and realizes variable speed descent of the saw blade through a hydraulic adjustment unit. Compared with the uniform and slow descent of the traditional technology, the sawing speed is improved while ensuring the sawing quality, the utilization rate of the saw blade is maximized, and the production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a conformal sawing device of a band sawing machine for a stainless steel pipe making machine of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the hydraulic adjustment unit when the supporting crossbeam in the present invention is slowly lowered;

[0026] Figure 3 It is a structural schematic diagram of the hydraulic adjustment unit when the supporting crossbeam in the present invention is rapidly lowered;

[0027] Figure 4 It is a structural schematic diagram of the hydraulic adjustment unit when the supporting crossbeam in the present invention rises;

[0028] Figure 5 It is a schematic diagram of the relative positions of the shape-conforming sawing component and the stainless steel pipe when the first inductive proximity switch in the present invention sends an electrical signal;

[0029] Figure 6 It is a schematic diagram of the relative positions of the shape-conforming sawing assembly and the stainless steel pipe when the supporting crossbeam in the present invention is rapidly lowered;

[0030] Figure 7 It is a schematic diagram of the relative positions of the shape-conforming sawing component and the stainless steel pipe when the second inductive proximity switch of the present invention sends an electrical signal;

[0031] Figure 8 It is a structural schematic diagram of the second embodiment of the shape-conforming sawing assembly in the present invention;

[0032] Fig. 9 It is a schematic diagram of the structure of the guide block in the present invention.

[0033] In the figure, 1-base; 11-control unit; 2-clamping assembly; 21-rib plate; 22-first clamping die; 23-stainless steel pipe; 24-second clamping die; 25-second cylinder; 3-lifting assembly; 31-driving wheel; 32-supporting crossbeam; 33-first inductive proximity switch; 34-second inductive proximity switch; 35-driven wheel; 36-saw blade; 37-hydraulic adjustment unit; 371-main oil pipe; 372-main regulating valve; 373-reversing valve; 374-oil supply pipe; 375-oil pump; 376-hydraulic adjustment unit; 377-main oil pipe; 378-main oil pipe; 379-reversing valve; 380-oil pipe; 381-oil pump; 382-main oil pipe; 383-reversing valve; 384-oil supply pipe; 385-oil pump; 386-hydraulic adjustment unit; 387-main oil pipe; 388-main oil pipe; 389-reversing valve; 390-oil pipe; 401-oil pump; 402-oil pump; 403-oil pump; 404-oil pump; 405-oil pump; 406-oil pump; 407-oil pump; 408-oil pump; 410-oil pump; 411-oil pump; 412-oil pump; 413-oil pump; 414-oil pump; 415-oil pump; 416-oil pump; 417-oil pump; 418-oil pump; 419-oil pump; 420-oil pump; 421-oil pump; 422-oil pump; 423-oil pump; 424-oil pump; 425-oil pump; 76-first oil return pipe; 377-oil tank; 378-auxiliary oil pipe; 379-auxiliary regulating valve; 3710-solenoid valve; 3711-second oil return pipe; 38-first cylinder; 39-sliding support rod; 4-contact sawing assembly; 41-connecting rod; 42-fixed frame; 43-spring; 44-sliding column; 45-guide block; 451-guide block body; 452-first pulley; 453-second pulley; 454-through groove; 46-threaded rod; 47-servo motor; 48-third inductive proximity switch. DETAILED DESCRIPTION

[0034] The structural principle and working principle of the present invention are described in detail below in conjunction with the accompanying drawings:

[0035] As attached Figure 1As shown, the present invention discloses a conformal sawing device for a stainless steel pipe making machine band saw, comprising a base 1, on which a control unit 11 and a clamping assembly 2 are fixedly installed, the clamping assembly 2 fixedly clamps a stainless steel pipe 23, a lifting assembly 3 is installed on the top of the base 1, the lifting assembly 3 comprises a first cylinder 38 and a sliding support rod 39 fixedly installed on the top of the base 1, the piston rod of the first cylinder 38 is fixedly installed with a supporting beam 32, the first cylinder 38 drives the supporting beam 32 to rise and fall along the sliding support rod 39, a driving wheel 31 and a driven wheel 35 are symmetrically installed on both sides of the supporting beam 32, a saw blade 36 is sleeved and connected between the driving wheel 31 and the driven wheel 35, the driving wheel 31 can drive the saw blade 36 to rotate, and under the drive of the first cylinder 38, the saw blade 36 can follow the supporting beam 32 to achieve lifting and falling.

[0036] The lifting assembly 3 is provided with a belt-rotating motor, which is used to drive the driving wheel 31 to rotate, and then drive the saw blade 36 to rotate around the driving wheel 31 and the driven wheel 35. The first cylinder 38 drives the saw blade 36. When the saw blade 36 descends, the saw blade 36 maintains reciprocating motion, thereby realizing the sawing of the stainless steel pipe 23. The lifting assembly 3 is also provided with a hydraulic adjustment unit 37. The second cylinder 31 is connected to the hydraulic adjustment unit 37. Two groups of symmetrically arranged conformal sawing assemblies 4 are installed on the lifting assembly 3. The hydraulic adjustment unit 37 is used to control the conformal sawing assemblies 4 to achieve variable speed descent during the descending sawing process. The clamping assembly 2 and the lifting assembly 3 are both electrically connected to the control unit 11. The control unit 11 can control the clamping assembly 2 and the lifting assembly 3 to complete corresponding operations.

[0037] Furthermore, the clamping assembly 2 includes a rib plate 21 and a first clamping die 22 fixedly mounted on the top of the base 1. The rib plate 21 and the first clamping die 22 are fixedly connected. The rib plate 21 is used to support the first clamping die 22 to ensure that the first clamping die 22 is firm and stable when clamping the stainless steel pipe 23. A second clamping die 24 opposite to the first clamping die 22 is slidably mounted on the top of the base 1. The first clamping die 22 and the second clamping die 24 are both provided with grooves suitable for the stainless steel pipe 23 on the opposite sides. The clamping assembly 2 also includes a second cylinder 25, the second cylinder 25 is fixedly installed on the sliding support rod 39, and the end of the second clamping die 24 away from the first clamping die 22 is fixedly connected to the piston rod of the second cylinder 25. The second cylinder 25 can push the second clamping die 24 to slide on the top of the base 1, and the stainless steel pipe 23 is placed between the first clamping die 22 and the second clamping die 24. The second cylinder 25 pushes the second clamping die 24 to slide in the direction close to the first clamping die 22, and the stainless steel pipe 23 is fixedly clamped between the first clamping die 22 and the second clamping die 24.

[0038] It should be noted that since the length of the stainless steel pipe 23 is often relatively long, two or more clamping assemblies 2 are usually required for stable clamping. Therefore, the present invention does not limit the number of clamping assemblies 2. In the embodiment disclosed in the present invention, two clamping assemblies 2 are provided.

[0039] The first inductive proximity switch 33 and the second inductive proximity switch 34 are fixedly installed on the side wall of the sliding support rod 39 from high to low, and the first inductive proximity switch 33 and the second inductive proximity switch 34 are used to sense the position of the support beam 32. When the lower edge of the saw blade 36 contacts the upper edge of the inner wall of the stainless steel pipe 23, the first inductive proximity switch 33 senses the support beam 32 and sends an electrical signal to the control unit 11, and when the lower edge of the saw blade 36 contacts the lower edge of the inner wall of the stainless steel pipe 23, the second inductive proximity switch 34 senses the support beam 32 and sends an electrical signal to the control unit 11.

[0040] Furthermore, as attached Figure 2 As shown, the hydraulic regulating unit 37 includes a main oil pipe 371 and a secondary oil pipe 378. The main oil pipe 371 is connected to a main regulating valve 372, and the main regulating valve 372 is connected to a reversing valve 373. The reversing valve 373 is connected to a first return oil pipe 376 in one direction and to an oil supply pipe 374 in the other direction. An oil pump 375 is installed on the oil supply pipe 374. The secondary oil pipe 378 is connected to a secondary regulating valve 379, and the secondary regulating valve 379 is connected to a solenoid valve 3710. The solenoid valve 3710 is connected to a second return oil pipe 3711. The oil supply pipe 374, the first return oil pipe 376 and the second return oil pipe 3711 are all connected to an oil tank 377.

[0041] As attached Figure 5 As shown, in the first embodiment of the conformable sawing assembly 4 of the present invention, the conformable sawing assembly 4 includes a connecting rod 41 and a fixed frame 42, the connecting rod 41 is fixedly connected to the lifting assembly 3, the fixed frame 42 is "concave", a sliding column 44 is fixedly installed in the fixed frame 42, the connecting rod 41 slides along the sliding column 44, a guide block 45 is fixedly installed at the bottom of the fixed frame 42, the guide block 45 can follow the fixed frame 42 to form a sliding connection with the connecting rod 41, the guide block 45 and the saw blade 36 maintain a sliding connection, that is, the saw blade 36 passes through the guide block 45 and can slide along the guide block 45, a spring 43 is arranged on the sliding column 44 between the connecting rod 41 and the stainless steel pipe 23, and the spring 43 pushes the fixed frame 42 and the guide block 45 to keep in contact with the outer wall of the stainless steel pipe 23 during the sawing process through its own elastic force.

[0042] As attached Figure 8As shown, in the second embodiment of the form-following sawing component 4 of the present invention, the form-following sawing component 4 includes a connecting rod 41 and a fixed frame 42, the connecting rod 41 is fixedly connected to the lifting component 3, the fixed frame 42 is "concave", and a servo motor 47 is fixedly installed on the side of the fixed frame 42 away from the stainless steel pipe 23, a threaded rod 46 is rotatably installed in the fixed frame 42, the threaded rod 46 is threadedly driven and connected to the connecting rod 41, the servo motor 47 drives the threaded rod 46 to rotate, and a third inductive proximity switch 48 is installed at one end of the guide block 45 close to the stainless steel pipe 23, the third inductive proximity switch 48 is electrically connected to the control unit 11, and the third inductive proximity switch 48 feeds back distance information to the control unit 11, and the control unit 11 controls the servo motor 47 to drive the rotation of the threaded rod 46 to ensure that the guide block 45 maintains contact with the outer wall of the stainless steel pipe 23 during the sawing process.

[0043] As attached Fig. 9 As shown, the guide block 45 includes a guide block body 451, and a first pulley 452 and a second pulley 453 are symmetrically arranged on both sides of the guide block body 451. The first pulley 452 and the second pulley 453 maintain contact with the outer wall of the stainless steel pipe 23 during the sawing process. A through groove 454 is opened at the bottom of the guide block body 451, and the saw blade 36 slides through the through groove 454, and the saw blade 36 maintains contact with the inner wall of the through groove 454. Since the guide block 45 always maintains contact with the outer wall of the stainless steel pipe 23 during the sawing process, the shaking amount of the saw blade 36 during the sawing process can be effectively reduced, the sawing efficiency is improved, and a smoother and more accurate sawing surface can be obtained.

[0044] In the first embodiment of the form-fitting sawing assembly 4 of the present invention, the form-fitting sawing assembly 4 is provided with two symmetrical groups. Before sawing, the spacing between the guide blocks 45 in the two groups of form-fitting sawing assemblies 4 is smaller than the outer wall diameter of the stainless steel pipe 23. The form-fitting sawing assembly 4 follows the lifting assembly 3 to descend. When the first pulley 452 and the second pulley 453 in the two groups of guide blocks 45 contact the outer wall of the stainless steel pipe 23, the first pulley 452 and the second pulley 453 roll along the outer wall surface of the stainless steel pipe 23. As the outer wall diameter of the stainless steel pipe 23 gradually increases, the two groups of guide blocks 45 move away from each other, and then push the two groups of fixed frames 42 to move away from each other and stretch the corresponding springs 43. The two groups of springs 43 generate a contraction force. At the same time, during the process of the two groups of guide blocks 45 moving away from each other, the saw blade 36 always keeps in contact with the inner wall of the through groove 454, so that the guide block 45 can effectively guide the saw blade 36.

[0045] As the follow-up sawing assembly 4 continues to descend following the lifting assembly 3, the diameter of the outer wall of the stainless steel pipe 23 gradually decreases. Under the action of the contraction force of the spring 43, the two groups of guide blocks 45 are driven to move closer to each other, and then the two groups of fixed frames 42 are pushed to move closer to each other, keeping the first pulley 452 and the second pulley 453 in contact with the outer wall of the stainless steel pipe 23 until the sawing is completed. When the follow-up sawing assembly 4 reaches the lowest position, the spring 43 returns to its initial state.

[0046] In the second embodiment of the form-fitting sawing assembly 4 of the present invention, the form-fitting sawing assembly 4 is provided with two symmetrical groups. Before sawing, the spacing between the guide blocks 45 in the two groups of form-fitting sawing assemblies 4 is smaller than the outer wall diameter of the stainless steel pipe 23. The form-fitting sawing assembly 4 follows the lifting assembly 3 to descend. When the first pulley 452 and the second pulley 453 in the two groups of guide blocks 45 contact the outer wall of the stainless steel pipe 23, the first pulley 452 and the second pulley 453 roll along the outer wall surface of the stainless steel pipe 23. At this time, the third inductive proximity switch 48 senses the distance information of the stainless steel pipe 23 and feeds the distance information back to the control unit. 11. The control unit 11 controls the servo motor 47 to drive the threaded rod 46 to rotate in the forward direction. Under the action of the thread, the two groups of fixed frames 42 move away from each other along the connecting rod 41, and then drive the two groups of guide blocks 45 to move away from each other. The control unit 11 controls the servo motor 47 to rotate the positions of the two groups of guide blocks 45, and keeps the first pulley 452 and the second pulley 453 rolling along the outer wall surface of the stainless steel pipe 23. At the same time, during the process of the two groups of guide blocks 45 moving away from each other, the saw blade 36 always keeps in contact with the inner wall of the through groove 454, so that the guide block 45 can effectively guide the saw blade 36.

[0047] As the conformable sawing assembly 4 continues to descend following the lifting assembly 3, the diameter of the outer wall of the stainless steel pipe 23 gradually decreases, and the control unit 11 controls the servo motor 47 to rotate the positions of the two groups of guide blocks 45, driving the two groups of guide blocks 45 to move closer to each other, keeping the first pulley 452 and the second pulley 453 rolling along the outer wall surface of the stainless steel pipe 23, and keeping the first pulley 452 and the second pulley 453 in contact with the outer wall of the stainless steel pipe 23 until the sawing is completed. When the conformable sawing assembly 4 reaches the lowest position, the two groups of guide blocks 45 return to the initial position.

[0048] As attached Figure 2As shown, the first cylinder 38 is connected to the hydraulic adjustment unit 37. Before the sawing process, the piston rod of the first cylinder 38 remains in the extended state. At this time, the lifting component 3 and the follow-up sawing component 4 are in the highest position. During the sawing process, the hydraulic adjustment unit 37 opens the main regulating valve 372, opens the reversing valve 373 to connect to the first return oil pipe 376, and closes the auxiliary regulating valve 379, so that the hydraulic oil of the first cylinder 38 will flow into the oil tank 377 through the main oil pipe 371 and the first return oil pipe 376 in turn. The piston rod of the first cylinder 38 is slowly contracted under the action of gravity, and then drives the saw blade 36 to slowly descend. During the descent, the saw blade 36 keeps rotating. When the saw blade 36 contacts the outer wall of the stainless steel pipe 23, the saw blade 36 starts to saw the stainless steel pipe 23. During the sawing process, the saw blade 36 keeps descending slowly.

[0049] As attached Figure 5 and attached Figure 6 As shown, as the saw blade 36 descends, the lower edge of the saw blade 36 contacts the upper edge of the inner wall of the stainless steel pipe 23. At this time, the sawing force of the saw blade 36 on the stainless steel pipe 23 is gradually dispersed along the inner wall of the stainless steel pipe 23, and the sawing resistance of the saw blade 36 is also gradually dispersed.

[0050] In order to improve the sawing efficiency, the descent speed of the saw blade 36 can be appropriately accelerated to increase the sawing speed. Since the stress on the saw blade 36 is gradually dispersed, the descent speed of the saw blade 36 can be appropriately increased under this working condition. The saw blade 36 will not produce plastic deformation and can still maintain sufficient sawing stability. The sawing surface of the stainless steel pipe 23 can also maintain sufficient smoothness.

[0051] As attached Figure 4 As shown, in the process from the lower edge of the saw blade 36 contacting the upper edge of the inner wall of the stainless steel pipe 23 to the lower edge of the saw blade 36 contacting the lower edge of the inner wall of the stainless steel pipe 23, the hydraulic adjustment unit 37 opens the auxiliary adjustment valve 379 and the solenoid valve 3710, so that the hydraulic oil of the first cylinder 38 will flow into the oil tank 377 through the main oil pipe 371 and the auxiliary oil pipe 378 at the same time, the outflow speed of the hydraulic oil in the first cylinder 38 is accelerated, and the piston rod of the first cylinder 38 is able to shrink rapidly under the action of gravity, thereby driving the saw blade 36 to keep descending rapidly while sawing the stainless steel pipe 23.

[0052] As attached Figure 7 As shown, as the saw blade 36 descends, the lower edge of the saw blade 36 contacts the lower edge of the inner wall of the stainless steel pipe 23. At this time, the sawing force of the saw blade 36 on the stainless steel pipe 23 is gradually concentrated along the inner wall of the stainless steel pipe 23, and the stress on the saw blade 36 is also gradually concentrated. The saw blade 36 needs to reduce the descending speed to prevent the saw blade 36 from plastic deformation and to ensure that the sawing surface of the stainless steel pipe 23 has sufficient smoothness.

[0053] As attached Figure 2 As shown, in the process from when the lower edge of the saw blade 36 contacts the lower edge of the inner wall of the stainless steel pipe 23 to when sawing is completed, in order to reduce the descending speed of the saw blade 36, the hydraulic adjustment unit 37 closes the auxiliary regulating valve 379 and the solenoid valve 3710, so that the hydraulic oil of the first cylinder 38 still only flows into the oil tank 377 through the main oil pipe 371, the outflow speed of the hydraulic oil in the first cylinder 38 slows down, and the piston rod of the first cylinder 38 slowly contracts, driving the saw blade 36 to slowly descend.

[0054] As attached Figure 4 As shown, after the cutting of the stainless steel pipe 23 is completed, the piston rod of the first cylinder 38 is completely retracted, and the saw blade 36 reaches the lowest position. At this time, the hydraulic adjustment unit 37 opens the reversing valve 373 to switch to the connecting oil supply pipe 374, the main oil pipe 371 remains open, and the auxiliary oil pipe 378 remains closed. Then the oil pump 375 is turned on to return the hydraulic oil in the oil tank 377 to the first cylinder 38 through the oil supply pipe 374 and the main oil pipe 371, and the piston rod of the first cylinder 38 is extended, thereby driving the supporting beam 32 and the saw blade 36 to rise to the initial position, thereby completing a lifting and sawing operation.

[0055] The present invention also discloses a sawing method of a stainless steel pipe making machine band sawing machine, comprising the following steps:

[0056] S1: The stainless steel pipe 23 is placed between the first clamping die 22 and the second clamping die 24, and the control unit 11 controls the second cylinder 25 to extend the piston rod and push the second clamping die 24 to slide, thereby clamping the stainless steel pipe 23;

[0057] S2: The first cylinder 38 remains in the extended state, and the control unit 11 starts the belt motor to drive the driving wheel 31 to rotate, and then drives the saw blade 36 to rotate, and the saw blade 36 drives the driven wheel 35 to rotate;

[0058] S3 The control unit 11 controls the hydraulic regulating unit 37 to open the main regulating valve 372, open the reversing valve 373 to connect to the first oil return pipe 376, and close the auxiliary regulating valve 379, so that the hydraulic oil of the first cylinder 38 will flow into the oil tank 377 through the main oil pipe 371 and the first oil return pipe 376 in sequence, and the piston rod of the first cylinder 38 can be slowly contracted, thereby driving the supporting beam 32 to slowly descend;

[0059] S4: The saw blade 36 slowly descends following the support beam 32. When the lower edge of the saw blade 36 contacts the upper edge of the stainless steel pipe 23, the saw blade 36 starts to saw the stainless steel pipe 23 and keeps slowly descending. During the descending sawing process of the saw blade 36, the conformal sawing assembly 4 keeps in contact with the outer wall of the stainless steel pipe 23.

[0060] S5: When the lower edge of the saw blade 36 contacts the upper edge of the inner wall of the stainless steel pipe 23, the first inductive proximity switch 33 senses the supporting beam 32 and feeds back an electrical signal to the control unit 11. At this time, the control unit 11 controls the hydraulic adjustment unit 37 to open the auxiliary adjustment valve 379 and the solenoid valve 3710, so that the hydraulic oil of the first cylinder 38 flows into the oil tank 377 through the main oil pipe 371 and the auxiliary oil pipe 378 at the same time. The outflow speed of the hydraulic oil in the first cylinder 38 becomes faster, and the piston rod of the first cylinder 38 can be quickly contracted, thereby driving the saw blade 36 to keep descending rapidly during the process of sawing the stainless steel pipe 23;

[0061] S6: When the lower edge of the saw blade 36 contacts the lower edge of the inner wall of the stainless steel pipe 23, the second inductive proximity switch 34 senses the supporting beam 32 and feeds back an electrical signal to the control unit 11. At this time, the control unit 11 controls the hydraulic adjustment unit 37 to close the auxiliary adjustment valve 379 and the solenoid valve 3710, so that the hydraulic oil of the first cylinder 38 flows into the oil tank 377 only through the main oil pipe 371 and the first return oil pipe 376. The outflow speed of the hydraulic oil in the first cylinder 38 slows down, and the piston rod of the first cylinder 38 is slowly retracted again, thereby driving the saw blade 36 to keep slowly descending during the process of sawing the stainless steel pipe 23.

[0062] S7: After the sawing of the stainless steel pipe 23 is completed, the first cylinder 38 retracts all the piston rods and the saw blade 36 reaches the lowest position. At this time, the control unit 11 controls the hydraulic adjustment unit 37 to open the reversing valve 373 to connect the oil supply pipe 374, and then turns on the oil pump 375 to return the hydraulic oil in the oil tank 377 to the first cylinder 38 through the oil supply pipe 374 and the main oil pipe 371. The piston rod of the first cylinder 38 is extended, thereby driving the supporting beam 32 and the saw blade 36 to rise to the initial position.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A stainless steel pipe making machine band sawing machine conformal sawing device, comprising a base (1), on which a control unit (11) and a clamping assembly (2) are fixedly mounted, wherein the clamping assembly (2) is used to fix and clamp a stainless steel pipe (23), characterized in that: A lifting assembly (3) is installed on the top of the base (1), and the lifting assembly (3) comprises a first cylinder (38) and a sliding support rod (39) fixedly installed on the top of the base (1); a supporting crossbeam (32) is fixedly installed on the piston rod of the first cylinder (38); the first cylinder (38) drives the supporting crossbeam (32) to rise and fall along the sliding support rod (39); a driving wheel (31) and a driven wheel (35) are symmetrically installed on both sides of the supporting crossbeam (32); a saw wheel (31) and a driven wheel (35) are sleeved and connected between the driving wheel (31) and the driven wheel (35). The lifting assembly (36) is also provided with a hydraulic adjustment unit (37), the clamping assembly (2) also includes a second cylinder (25), the second cylinder (25) is connected to the hydraulic adjustment unit (37), two groups of symmetrically arranged shape-following sawing assemblies (4) are installed on the lifting assembly (3), the hydraulic adjustment unit (37) is used to control the shape-following sawing assemblies (4) to achieve variable speed descent during the descent sawing process, and the clamping assembly (2) and the lifting assembly (3) are both electrically connected to the control unit (11); The shape-following sawing assembly (4) comprises a connecting rod (41), the connecting rod (41) is fixedly connected to the lifting assembly (3), the connecting rod (41) is slidably connected to a guide block (45), the guide block (45) is slidably connected to the saw blade (36), and the guide block (45) is kept in contact with the outer wall of the stainless steel pipe (23) during the sawing process; The side walls of the sliding support rod (39) are fixedly mounted with a first inductive proximity switch (33) and a second inductive proximity switch (34) in sequence from high to low. The first inductive proximity switch (33) and the second inductive proximity switch (34) are used to sense the position of the support beam (32). When the lower edge of the saw blade (36) contacts the upper edge of the inner wall of the stainless steel pipe (23), the first inductive proximity switch (33) senses the support beam (32) and sends an electrical signal to the control unit (11). When the lower edge of the saw blade (36) contacts the lower edge of the inner wall of the stainless steel pipe (23), the second inductive proximity switch (34) senses the support beam (32) and sends an electrical signal to the control unit (11). The hydraulic adjustment unit (37) comprises a main oil pipe (371) and a secondary oil pipe (378); the main oil pipe (371) is connected to a main regulating valve (372); the main regulating valve (372) is connected to a reversing valve (373); one direction of the reversing valve (373) is connected to a first oil return pipe (376); the other direction of the reversing valve (373) is connected to an oil supply pipe (374); an oil pump (375) is installed on the oil supply pipe (374); the secondary oil pipe (378) is connected to a secondary regulating valve (379); the secondary regulating valve (379) is connected to a solenoid valve (3710); the solenoid valve (3710) is connected to a second oil return pipe (3711); the oil supply pipe (374), the first oil return pipe (376) and the second oil return pipe (3711) are all connected to an oil tank (377); The shape-following sawing assembly (4) further comprises a fixed frame (42), the fixed frame (42) is in a "concave" shape, a sliding column (44) is fixedly installed in the fixed frame (42), the connecting rod (41) slides along the sliding column (44), a spring (43) is arranged on the sliding column (44) between the connecting rod (41) and the stainless steel pipe (23), the guide block (45) is fixedly installed at the bottom of the fixed frame (42), and the spring (43) pushes the fixed frame (42) and the guide block (45) to keep in contact with the outer wall of the stainless steel pipe (23) during the sawing process through its own elastic force; The guide block (45) comprises a guide block body (451), and a first pulley (452) and a second pulley (453) are symmetrically arranged on both sides of the guide block body (451), and the first pulley (452) and the second pulley (453) are kept in contact with the outer wall of the stainless steel pipe (23) during the sawing process. A through groove (454) is opened at the bottom of the guide block body (451), and the saw blade (36) slides through the through groove (454), and the saw blade (36) keeps in contact with the inner wall of the through groove (454).

2. A stainless steel pipe making machine band sawing machine form-fitting sawing device, comprising a base (1), on which a control unit (11) and a clamping assembly (2) are fixedly mounted, wherein the clamping assembly (2) is used to fixedly clamp a stainless steel pipe (23), characterized in that: A lifting assembly (3) is installed on the top of the base (1), and the lifting assembly (3) comprises a first cylinder (38) and a sliding support rod (39) fixedly installed on the top of the base (1); a supporting crossbeam (32) is fixedly installed on the piston rod of the first cylinder (38); the first cylinder (38) drives the supporting crossbeam (32) to rise and fall along the sliding support rod (39); a driving wheel (31) and a driven wheel (35) are symmetrically installed on both sides of the supporting crossbeam (32); a saw wheel (31) and a driven wheel (35) are sleeved and connected between the driving wheel (31) and the driven wheel (35). The lifting assembly (36) is also provided with a hydraulic adjustment unit (37), the clamping assembly (2) also includes a second cylinder (25), the second cylinder (25) is connected to the hydraulic adjustment unit (37), two groups of symmetrically arranged shape-following sawing assemblies (4) are installed on the lifting assembly (3), the hydraulic adjustment unit (37) is used to control the shape-following sawing assemblies (4) to achieve variable speed descent during the descent sawing process, and the clamping assembly (2) and the lifting assembly (3) are both electrically connected to the control unit (11); The shape-following sawing assembly (4) comprises a connecting rod (41), the connecting rod (41) is fixedly connected to the lifting assembly (3), the connecting rod (41) is slidably connected to a guide block (45), the guide block (45) is slidably connected to the saw blade (36), and the guide block (45) is kept in contact with the outer wall of the stainless steel pipe (23) during the sawing process; The side walls of the sliding support rod (39) are fixedly mounted with a first inductive proximity switch (33) and a second inductive proximity switch (34) in sequence from high to low. The first inductive proximity switch (33) and the second inductive proximity switch (34) are used to sense the position of the support beam (32). When the lower edge of the saw blade (36) contacts the upper edge of the inner wall of the stainless steel pipe (23), the first inductive proximity switch (33) senses the support beam (32) and sends an electrical signal to the control unit (11). When the lower edge of the saw blade (36) contacts the lower edge of the inner wall of the stainless steel pipe (23), the second inductive proximity switch (34) senses the support beam (32) and sends an electrical signal to the control unit (11). The hydraulic adjustment unit (37) comprises a main oil pipe (371) and a secondary oil pipe (378); the main oil pipe (371) is connected to a main regulating valve (372); the main regulating valve (372) is connected to a reversing valve (373); one direction of the reversing valve (373) is connected to a first oil return pipe (376); the other direction of the reversing valve (373) is connected to an oil supply pipe (374); an oil pump (375) is installed on the oil supply pipe (374); the secondary oil pipe (378) is connected to a secondary regulating valve (379); the secondary regulating valve (379) is connected to a solenoid valve (3710); the solenoid valve (3710) is connected to a second oil return pipe (3711); the oil supply pipe (374), the first oil return pipe (376) and the second oil return pipe (3711) are all connected to an oil tank (377); The form-following sawing assembly (4) comprises a fixed frame (42), the fixed frame (42) is in a "concave" shape, a servo motor (47) is fixedly installed on a side of the fixed frame (42) away from the stainless steel pipe (23), a threaded rod (46) is rotatably installed in the fixed frame (42), the threaded rod (46) is threadedly driven and connected to the connecting rod (41), the servo motor (47) drives the threaded rod (46) to rotate, and a third inductive proximity switch (48) is installed on one end of the guide block (45) close to the stainless steel pipe (23), the third inductive proximity switch (48) is electrically connected to the control unit (11), the third inductive proximity switch (48) feeds back distance information to the control unit (11), and the control unit (11) controls the servo motor (47) to drive the threaded rod (46) to rotate to ensure that the guide block (45) maintains contact with the outer wall of the stainless steel pipe (23) during the sawing process; The guide block (45) comprises a guide block body (451), and a first pulley (452) and a second pulley (453) are symmetrically arranged on both sides of the guide block body (451), and the first pulley (452) and the second pulley (453) are kept in contact with the outer wall of the stainless steel pipe (23) during the sawing process. A through groove (454) is opened at the bottom of the guide block body (451), and the saw blade (36) slides through the through groove (454), and the saw blade (36) keeps in contact with the inner wall of the through groove (454).

3. A stainless steel pipe making machine band sawing machine conformal sawing device according to claim 1 or 2, characterized in that: The clamping assembly (2) comprises a rib plate (21) and a first clamping die (22) fixedly mounted on the top of the base (1); the rib plate (21) and the first clamping die (22) are fixedly connected; a second clamping die (24) opposite to the first clamping die (22) is slidably mounted on the top of the base (1); the stainless steel pipe (23) is fixedly clamped between the first clamping die (22) and the second clamping die (24); the second cylinder (25) is fixedly mounted on the sliding support rod (39); an end of the second clamping die (24) away from the first clamping die (22) is fixedly connected to a piston rod of the second cylinder (25); and the second cylinder (25) is capable of pushing the second clamping die (24) to slide on the top of the base (1).

4. The stainless steel pipe making machine band sawing machine conformal sawing device according to claim 3, characterized in that: The sawing method of the stainless steel pipe making machine band sawing machine conformal sawing device comprises the following steps: S1: placing the stainless steel pipe (23) between the first clamping die (22) and the second clamping die (24), and the control unit (11) controls the second cylinder (25) to extend the piston rod and push the second clamping die (24) to slide, thereby clamping the stainless steel pipe (23); S2: The first cylinder (38) remains in the extended state, and the control unit (11) starts the belt motor to drive the driving wheel (31) to rotate, which in turn drives the saw blade (36) to rotate, and the saw blade (36) drives the driven wheel (35) to rotate; S3: The control unit (11) controls the hydraulic regulating unit (37) to open the main regulating valve (372), open the reversing valve (373) to connect to the first oil return pipe (376), and close the auxiliary regulating valve (379), so that the hydraulic oil of the first cylinder (38) flows into the oil tank (377) through the main oil pipe (371) and the first oil return pipe (376) in sequence, and the piston rod of the first cylinder (38) is slowly contracted, thereby driving the supporting beam (32) to slowly descend; S4: The saw blade (36) slowly descends following the supporting crossbeam (32). When the lower edge of the saw blade (36) contacts the upper edge of the stainless steel pipe (23), the saw blade (36) starts to saw the stainless steel pipe (23) and keeps slowly descending. During the descending sawing process of the saw blade (36), the shape-conforming sawing assembly (4) keeps in contact with the outer wall of the stainless steel pipe (23); S5: When the lower edge of the saw blade (36) contacts the upper edge of the inner wall of the stainless steel pipe (23), the first inductive proximity switch (33) senses the supporting beam (32) and feeds back an electrical signal to the control unit (11). The control unit (11) controls the hydraulic adjustment unit (37) to open the auxiliary adjustment valve (379) and the solenoid valve (3710), so that the hydraulic oil of the first cylinder (38) flows into the oil tank (377) through the main oil pipe (371) and the auxiliary oil pipe (378) at the same time. The outflow speed of the hydraulic oil in the first cylinder (38) becomes faster, and the piston rod of the first cylinder (38) is able to shrink rapidly, thereby driving the saw blade (36) to descend rapidly. S6: When the lower edge of the saw blade (36) contacts the lower edge of the inner wall of the stainless steel pipe (23), the second inductive proximity switch (34) senses the supporting beam (32) and feeds back an electrical signal to the control unit (11). The control unit (11) controls the hydraulic adjustment unit (37) to close the auxiliary adjustment valve (379) and the solenoid valve (3710), so that the hydraulic oil of the first cylinder (38) flows into the oil tank (377) only through the main oil pipe (371) and the first return oil pipe (376). The outflow speed of the hydraulic oil in the first cylinder (38) slows down, and the piston rod of the first cylinder (38) is slowly retracted again, thereby driving the saw blade (36) to keep slowly descending; S7: After the sawing of the stainless steel pipe (23) is completed, the first cylinder (38) retracts all piston rods, the saw blade (36) reaches the lowest position, the control unit (11) controls the hydraulic adjustment unit (37) to switch to the connecting oil supply pipe (374), and then starts the oil pump (375) to return the hydraulic oil in the oil tank (377) to the first cylinder (38) through the oil supply pipe (374) and the main oil pipe (371), so that the piston rod of the first cylinder (38) is extended, thereby driving the supporting beam (32) and the saw blade (36) to rise to the initial position.

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