Double-end sawing and internal and external grinding all-in-one machine for large-diameter aluminum alloy pipe belt

Abstract

The invention belongs to the technical field of saw blade grinding and repairing, and particularly relates to a double-end sawing and internal and external grinding all-in-one machine for a large-diameter aluminum alloy pipe belt, which is characterized in that after an intermittent driving plate assembly is lifted upwards by a lifting assembly, an internal tooth grinding assembly is aligned to the upper end of a helical tooth saw disc of a double-saw-disc machine tool through an X-axis sliding bracket; the limiting switch is used for controlling the downward moving stroke of the lifting assembly so that outer tooth tips of the inner tooth grinding assembly and outer tooth gaps of the helical tooth saw disc can be embedded, the inner tooth grinding assembly sufficiently grinds the inner side of the helical tooth saw disc, and the intermittent drive plate assembly sucks the saw disc to complete ratchet wheel one-way intermittent transmission so as to grind all inner grooves of the saw disc. The outer side of the saw disc is fully polished by the outer tooth flexible polishing assembly; the lifting assembly is matched with the X-axis sliding support to enable the helical tooth grinding block to be in butt joint with the inner sides of helical teeth of the saw disc, the helical tooth grinding block rotates in the direction of the shearing face in the tooth groove through the stepping motor to grind the inner teeth of the saw disc, and then the sufficient grinding effect of the inner side dead corners of the saw disc of the double-saw-disc machine tool is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of saw blade grinding and repairing, and in particular relates to a large-caliber aluminum alloy pipe band double-head saw internal and external grinding integrated machine. Background Art

[0002] The large-diameter aluminum alloy tube and strip double-head saw is a metal material cutting tool, which is mainly used for fast and accurate cutting of aluminum alloy tubes and strips. It adopts a double-head design, that is, the equipment has two saw heads, which can work simultaneously or separately to improve cutting efficiency. The internal and external grinding of the double-head saw usually refers to the grinding and maintenance process of the saw blade, which is an important step to ensure the stable performance of the saw blade, improve cutting efficiency and service life.

[0003] For the internal and external grinding operation of metal bevel saw blades, due to the special characteristics of the saw disc, its hardness and toughness are required to far exceed the performance of the object being cut, which makes the saw disc very difficult to grind. The current traditional grinding machine system separates the internal and external cylindrical grinding from the surface grinding. After performing a grinding operation, the operator is required to manually switch the grinding disc, and then put it into the next grinder to fix it and perform the corresponding operation. This method is very troublesome during the operation, and the production efficiency is reduced. In addition, during the switching of the grinding disc, the fixed center axis will produce deviations, resulting in unqualified products and unnecessary troubles for future use.

[0004] Therefore, a large-caliber aluminum alloy pipe strip double-head sawing and internal and external grinding integrated machine is designed to solve the above problems. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a large-caliber aluminum alloy pipe band double-head sawing and internal and external grinding integrated machine to achieve the high-efficiency grinding effect of the inner and outer sides of the saw disc.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large-diameter aluminum alloy tube strip double-head sawing and internal and external grinding integrated machine, including a double saw disk machine tool and a high-efficiency internal and external grinding integrated machine installed on the top of the double saw disk machine tool, the high-efficiency internal and external grinding integrated machine including an X-axis sliding bracket, a lifting assembly, an internal gear grinding assembly, an intermittent dial assembly, an external gear flexible grinding assembly and a limit switch, the X-axis sliding bracket is threadedly sleeved on both sides of the double saw disk machine tool, the lifting assembly is fixedly connected to the top of the X-axis sliding bracket, the internal gear grinding assembly is installed on the inner side of the lifting assembly, the intermittent dial assembly is installed on the bottom of the lifting assembly for sucking the saw disk, the external gear flexible grinding assembly is clamped on the top outer side of the lifting assembly, and the limit switch is installed on the upper end of the internal gear grinding assembly; After the lifting assembly lifts the intermittent dial assembly upward, the inner tooth grinding assembly is positioned opposite the upper end of the bevel saw disk of the double saw disk machine tool through the X-axis sliding bracket, and the limit switch is used to control the downward stroke of the lifting assembly to fit the outer tooth tip of the inner tooth grinding assembly with the outer tooth gap of the bevel saw disk. The inner tooth grinding assembly fully grinds the inner side of the bevel saw disk, and the intermittent dial assembly attracts the saw disk to complete the one-way intermittent transmission of the ratchet to grind each inner groove of the saw disk, and the outer tooth flexible grinding assembly fully grinds the outer side of the saw disk.

[0007] Preferably, the internal gear grinding assembly includes a conveying shaft, a dust cover, a stepper motor, a rotating disk and a bevel gear grinding block, the conveying shaft is installed on the inner side of the lifting assembly, the dust cover is fixedly connected to the outer side of the conveying shaft, the stepper motor is installed inside the dust cover for connecting the rotating disk, the outer surface of the rotating disk is welded and fixed to one side of the bevel gear grinding block, and the bevel gear grinding block is embedded in the outer tooth gap of the saw disk of the double saw disk machine tool.

[0008] Preferably, the lifting assembly includes a fixed bracket, a propulsion cylinder, a lifting platform, a linear shaft and a positioning plate, the fixed bracket is fixedly connected to the top of the X-axis sliding bracket, the lifting platform is slidably sleeved on the middle part of the fixed bracket, the positioning plate is fixedly connected to the inner side of the lifting platform, the linear shaft passes through the interior of the positioning plate for connecting the fixed bracket, and the output end of the propulsion cylinder is fixedly connected to the bottom of the positioning plate.

[0009] Preferably, the intermittent dial assembly includes a limit shell, a rotating disk, a motor drive shaft, a limit ratchet, an engaging slide rod, a limit pawl, a connecting shaft and a telescopic suction rod, the motor drive shaft is fixedly connected to the middle part of the rotating disk, the rotating disk is rotatably connected to the inner side of the limit shell, the limit shell is installed on the top side of the lifting platform, the limit ratchet is sleeved on the bottom of the motor drive shaft, the outer side of the engaging slide rod is engaged with the outer teeth of the limit ratchet, one side of the limit pawl is fixedly connected to the outer wall of the connecting shaft, the connecting shaft is rotatably connected to the inside of the limit shell, and the telescopic suction rod is installed on the outer side of the rotating disk.

[0010] Preferably, the telescopic suction rod includes a hydraulic cylinder, a hollow sleeve rod, an outer rod and a magnet block. The hydraulic cylinder is installed inside the hollow sleeve rod for connecting the outer rod. The outer rod is slidably sleeved inside the hollow sleeve rod. The magnet block is fixedly connected to the outside of the outer rod for suctioning the metal saw disk.

[0011] Preferably, a compression spring seat is fixedly connected to the interior of the limiting shell, and a protruding end of the compression spring seat abuts against an outer wall surface of the limiting pawl.

[0012] Preferably, a limit spring seat is further provided on one side of the engagement slide rod, and two sides of the limit spring seat are respectively fixedly connected to the engagement slide rod and the opposite side surfaces of the limit shell.

[0013] Preferably, the external tooth flexible grinding assembly includes a mounting frame, a DC motor and an external tooth grinding disc, the mounting frame is rotatably connected to the inner side of the top of the lifting platform, the DC motor is installed on one side of the mounting frame for connecting the external tooth grinding disc, and the surface of the external tooth grinding disc is used for grinding the outer side of the saw disc.

[0014] Preferably, a driving motor and a bidirectional screw are also provided on the inner side of the bottom of the double saw disk machine tool, the motor shaft of the driving motor is fixedly connected to one end of the bidirectional screw through a coupling, and the bidirectional screw is threadedly sleeved on the inner side of the bottom of the X-axis sliding bracket.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the bevel tooth grinding block is connected to the inner side of the bevel teeth of the saw disk through the lifting assembly and the X-axis sliding bracket. The bevel tooth grinding block is rotated along the shear surface direction in the tooth groove by a stepper motor to grind the inner teeth of the saw disk, thereby improving the full grinding effect of the dead corners on the inner side of the saw disk of the double saw disk machine tool.

[0016] 2. In the present invention, the outer rod and the magnet block firmly hold the saw disc, and the intermittent transmission is completed in one direction through the intermittent dial assembly, so that the bevel grinding block can grind the groove surface of each inner groove of the saw disc.

[0017] 3. In the present invention, the outer tooth flexible grinding assembly can be rotated along the bottom of the lifting platform to control the grinding direction, so as to facilitate efficient grinding of the outer side of the saw disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is an enlarged view of the connection between the internal gear grinding assembly and the saw disc in the present invention; Figure 3 It is a side view of the high-efficiency internal and external grinding integrated machine of the present invention; Figure 4 This is a cross-sectional effect diagram of the fixed bracket in the present invention; Figure 5 It is a schematic diagram of the structure of the external gear flexible grinding assembly in the present invention; Figure 6 It is a schematic diagram of the structure inside the limiting shell in the present invention; Figure 7 It is a schematic diagram of the structure of the outer side of the rotating disk in the present invention; Figure 8 This is a diagram showing the position of the saw blades of the double saw disc machine tool in the present invention.

[0019] In the figure: 1. Double saw disc machine; 2. High-efficiency internal and external grinding machine; 3. X-axis sliding bracket; 4. Lifting assembly; 5. Internal gear grinding assembly; 6. Intermittent dial assembly; 7. External gear flexible grinding assembly; 8. Limit switch; 9. Conveyor shaft; 10. Dust cover; 11. Stepper motor; 12. Rotating disk; 13. Bevel gear grinding block; 14. Fixed bracket; 15. Propelling cylinder; 16. Lifting platform; 17. Linear axis; 18. Positioning plate; 19. Limit shell ; 20. Rotating disk; 21. Motor drive shaft; 22. Limit ratchet; 23. Engaging slide rod; 24. Limit pawl; 25. Connecting shaft; 26. Telescopic suction rod; 27. Hydraulic cylinder; 28. Hollow sleeve rod; 29. ​​External rod; 30. Magnet block; 31. Compression spring seat; 32. Limit spring seat; 33. Mounting bracket; 34. DC motor; 35. External tooth grinding disc; 36. Drive motor; 37. Bidirectional screw; 38. Leaf spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 1-Figure 8 The illustrated embodiment of a large-caliber aluminum alloy tube strip double-head sawing and internal and external grinding integrated machine comprises a double saw disc machine 1 and a high-efficiency internal and external grinding integrated machine 2 installed on the top of the double saw disc machine 1, wherein the high-efficiency internal and external grinding integrated machine 2 comprises an X-axis sliding bracket 3, a lifting assembly 4, an internal gear grinding assembly 5, an intermittent dial assembly 6, an external gear flexible grinding assembly 7 and a limit switch 8, wherein the X-axis sliding bracket 3 is threadedly sleeved on both sides of the double saw disc machine 1, the lifting assembly 4 is fixedly connected to the top of the X-axis sliding bracket 3, the internal gear grinding assembly 5 is installed on the inner side of the lifting assembly 4, the intermittent dial assembly 6 is installed on the bottom of the lifting assembly 4 for attracting the saw disc, the external gear flexible grinding assembly 7 is clamped on the top outer side of the lifting assembly 4, and the limit switch 8 is installed on the upper end of the internal gear grinding assembly 5; After the lifting assembly 4 lifts the intermittent dial assembly 6 upwards, the inner tooth grinding assembly 5 is placed opposite the upper end of the bevel saw disk of the double saw disk machine tool 1 through the X-axis sliding bracket 3, and the limit switch 8 is used to control the downward stroke of the lifting assembly 4 to fit the outer tooth tip of the inner tooth grinding assembly 5 with the outer tooth gap of the bevel saw disk. The inner tooth grinding assembly 5 fully grinds the inner side of the bevel saw disk, and the intermittent dial assembly 6 attracts the saw disk to complete the ratchet one-way intermittent transmission to grind each inner groove of the saw disk, and the outer tooth flexible grinding assembly 7 fully grinds the outer side of the saw disk.

[0022] The bevel gear grinding block 13 is connected to the inner side of the bevel gear of the saw disk through the lifting assembly 4 in cooperation with the X-axis sliding bracket 3. The bevel gear grinding block 13 is rotated along the shear surface direction in the tooth groove by the stepping motor 11 to grind the inner teeth of the saw disk, thereby improving the full grinding effect of the dead corners on the inner side of the saw disk of the double saw disk machine tool 1; the outer gear flexible grinding assembly 7 rotates along the bottom of the lifting platform 16 to control the grinding direction, which is convenient for efficient grinding of the outer side of the saw disk; the one-way intermittent transmission is completed through the intermittent dial assembly 6, thereby facilitating the bevel gear grinding block 13 to grind the groove surface of each inner groove of the saw disk.

[0023] The internal gear grinding assembly 5 includes a conveying shaft 9, a dust cover 10, a stepper motor 11, a rotating disk 12 and a bevel gear grinding block 13. The conveying shaft 9 is installed on the inner side of the lifting assembly 4, the dust cover 10 is fixedly connected to the outer side of the conveying shaft 9, the stepper motor 11 is installed inside the dust cover 10 for connecting the rotating disk 12, the outer surface of the rotating disk 12 is welded and fixed to one side of the bevel gear grinding block 13, and the bevel gear grinding block 13 is embedded in the outer tooth gap of the saw disk of the double saw disk machine tool 1.

[0024] Connect the dust cover 10 to the outer end of the conveying shaft 9, start the stepper motor 11 inside the dust cover 10, and the stepper motor 11 drives the rotating disk 12 and the outer bevel grinding block 13 to rotate. The bevel grinding block 13 is rotated along the shear surface direction in the tooth groove by the stepper motor 11 to grind the inner teeth of the saw disk, thereby improving the full grinding effect of the dead corner inside the saw disk of the double saw disk machine tool 1.

[0025] The lifting assembly 4 includes a fixed bracket 14, a propulsion cylinder 15, a lifting platform 16, a linear shaft 17 and a positioning plate 18. The fixed bracket 14 is fixedly connected to the top of the X-axis sliding bracket 3, the lifting platform 16 is slidably sleeved in the middle of the fixed bracket 14, the positioning plate 18 is fixedly connected to the inner side of the lifting platform 16, the linear shaft 17 passes through the interior of the positioning plate 18 for connecting the fixed bracket 14, and the output end of the propulsion cylinder 15 is fixedly connected to the bottom of the positioning plate 18.

[0026] In order to ensure the smooth docking of the bevel grinding block 13 with the inner tooth groove of the saw disk, the propulsion cylinder 15 inside the fixed bracket 14 is started through the control end, and the propulsion cylinder 15 pulls the positioning plate 18 and then drives the lifting platform 16 to move downward. The linear shaft 17 is sleeved inside the positioning plate 18 to guide the lifting platform 16 and improve the stability of the movement of the lifting platform 16, that is, the downward movement stroke of the lifting component 4 is accurately controlled by the limit switch 8. As the lifting component 4 moves downward, the outer tooth tip of the bevel grinding block 13 of the inner tooth grinding component 5 will gradually approach the outer tooth gap of the bevel saw disk. Fine adjustment is performed to ensure that the cooperation between the inner tooth grinding component and the bevel saw disk reaches the best state. When the two are in contact, the outer tooth tip of the bevel grinding block 13 can be smoothly embedded in the inner tooth groove of the bevel saw disk.

[0027] The intermittent dial assembly 6 includes a limit shell 19, a rotating disk 20, a motor drive shaft 21, a limit ratchet 22, an engaging slide bar 23, a limit pawl 24, a connecting shaft 25 and a telescopic suction rod 26. The motor drive shaft 21 is fixedly connected to the middle part of the rotating disk 20, and the rotating disk 20 is rotatably connected to the inner side of the limit shell 19. The limit shell 19 is installed on the top side of the lifting platform 16. The limit ratchet 22 is sleeved on the bottom of the motor drive shaft 21. The outer side of the engaging slide bar 23 is engaged with the outer teeth of the limit ratchet 22. One side of the limit pawl 24 is fixedly connected to the outer wall of the connecting shaft 25. The connecting shaft 25 is rotatably connected to the inside of the limit shell 19, and the telescopic suction rod 26 is installed on the outer side of the rotating disk 20.

[0028] The rotating disk 20 is driven to rotate by driving the motor driving shaft 21. At the same time, the limit ratchet 22 connected to the inner side of the motor driving shaft 21 rotates synchronously. In this process, under the joint action of the limit spring seat 32, the outer meshing slide bar 23 is gradually engaged and limited along the outer teeth of the limit ratchet 22, thereby increasing the resistance of the limit ratchet 22 to prevent excessive rotation; at the same time, the limit pawl 24 on one side is bounced outward along the outer teeth of the limit ratchet 22, and the leaf spring 38 seat is restored. Under the elastic support of the spring, the limit pawl 24 on the other side of the compression spring seat 31 is pushed outward at the same time under the push of the compression spring seat 31. The elastic force of the compression spring seat 31 is greater than the deformation elastic force of the leaf spring 38. When it moves to the meshing gap of the limit ratchet 22, the compression spring seat 31 is restored and pushes the limit pawl 24 to rest against the gap of the limit ratchet 22, thereby completing the unidirectional intermittent rotation operation of the rotating disk 20.

[0029] The telescopic suction rod 26 includes a hydraulic cylinder 27, a hollow sleeve rod 28, an outer rod 29 and a magnet block 30. The hydraulic cylinder 27 is installed inside the hollow sleeve rod 28 for connecting the outer rod 29. The outer rod 29 is slidably sleeved inside the hollow sleeve rod 28. The magnet block 30 is fixedly connected to the outer side of the outer rod 29 for sucking the metal saw disk.

[0030] Before the rotating disk 20 rotates intermittently, the hydraulic cylinder 27 inside the hollow sleeve rod 28 can be started, and its piston end pushes the outer rod 29 to extend out of the hollow sleeve rod 28, so that the outermost magnet block 30 contacts and magnetically attracts the surface of the metal saw disk, and cooperates with the intermittently rotating rotating disk 20 to drive the saw disk to rotate synchronously, so that the inner tooth grooves of the saw disk can be evenly ground by the bevel tooth grinding block 13.

[0031] A compression spring seat 31 is also fixedly connected to the interior of the limiting shell 19 , and a protruding end of the compression spring seat 31 abuts against an outer wall surface of the limiting pawl 24 .

[0032] A limit spring seat 32 is further provided on one side of the engagement slide bar 23 , and two sides of the limit spring seat 32 are fixedly connected to the engagement slide bar 23 and the opposite side surfaces of the limit shell 19 .

[0033] The external tooth flexible grinding assembly 7 includes a mounting frame 33, a DC motor 34 and an external tooth grinding disc 35. The mounting frame 33 is rotatably connected to the inner side of the top of the lifting platform 16. The DC motor 34 is installed on one side of the mounting frame 33 for connecting the external tooth grinding disc 35. The surface of the external tooth grinding disc 35 is used to grind the outer side of the saw disc.

[0034] A driving motor 36 and a bidirectional screw 37 are also provided on the inner side of the bottom of the double saw disc machine tool 1. The motor shaft of the driving motor 36 is fixedly connected to one end of the bidirectional screw 37 through a coupling. The bidirectional screw 37 is threadedly sleeved on the inner side of the bottom of the X-axis sliding bracket 3.

[0035] The X-axis sliding bracket 3 can complete bidirectional movement with the cooperation of the bidirectional screw 37, and cooperate with the limit switch 8 to enable the bevel grinding block 13 to accurately locate the saw disk and fit into its inner tooth groove; on the other hand, the staff can flexibly screw the mounting frame 33 according to the grinding position of the outer side of the saw disk, so that the outer tooth grinding disc 35 can face the outer surface of the saw disk and grind the tip surface, and start the DC motor 34 to drive the outer tooth grinding disc 35 to complete the efficient grinding operation of the outer side of the saw disk.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A large-caliber aluminum alloy pipe strip double-head sawing and internal and external grinding integrated machine, comprising a double-saw disc machine tool (1) and a high-efficiency internal and external grinding integrated machine (2) installed on the top of the double-saw disc machine tool (1), characterized in that: The high-efficiency internal and external grinding machine (2) comprises an X-axis sliding bracket (3), a lifting assembly (4), an internal gear grinding assembly (5), an intermittent dial assembly (6), an external gear flexible grinding assembly (7) and a limit switch (8), wherein the X-axis sliding bracket (3) is threadedly sleeved on both sides of the double saw disc machine tool (1), the lifting assembly (4) is fixedly connected to the top of the X-axis sliding bracket (3), the internal gear grinding assembly (5) is installed on the inner side of the lifting assembly (4), the intermittent dial assembly (6) is installed on the bottom of the lifting assembly (4) for attracting the saw disc, the external gear flexible grinding assembly (7) is clamped on the outer side of the top of the lifting assembly (4), and the limit switch (8) is installed on the upper end of the internal gear grinding assembly (5); After the lifting assembly (4) lifts the intermittent dial assembly (6) upward, the inner tooth grinding assembly (5) is positioned opposite the upper end of the bevel saw disk of the double saw disk machine tool (1) through the X-axis sliding bracket (3). The limit switch (8) is used to control the downward movement of the lifting assembly (4) to fit the outer tooth tip of the inner tooth grinding assembly (5) into the outer tooth gap of the bevel saw disk. The inner tooth grinding assembly (5) fully grinds the inner side of the bevel saw disk. The intermittent dial assembly (6) attracts the saw disk to complete the one-way intermittent transmission of the ratchet to grind each inner groove of the saw disk. The outer tooth flexible grinding assembly (7) fully grinds the outer side of the saw disk.

2. The large-caliber aluminum alloy pipe band double-head saw and internal and external grinding integrated machine according to claim 1, characterized in that: The internal gear grinding assembly (5) comprises a conveying shaft (9), a dust cover (10), a stepper motor (11), a rotating disk (12) and a bevel gear grinding block (13); the conveying shaft (9) is mounted on the inner side of the lifting assembly (4); the dust cover (10) is fixedly connected to the outer side of the conveying shaft (9); the stepper motor (11) is mounted inside the dust cover (10) for connecting to the rotating disk (12); the outer surface of the rotating disk (12) is welded and fixed to one side of the bevel gear grinding block (13); and the bevel gear grinding block (13) is embedded in the outer tooth gap of the saw disk of the double saw disk machine tool (1).

3. The large-caliber aluminum alloy pipe band double-head saw and internal and external grinding integrated machine according to claim 1, characterized in that: The lifting assembly (4) comprises a fixed bracket (14), a propulsion cylinder (15), a lifting platform (16), a linear shaft (17) and a positioning plate (18); the fixed bracket (14) is fixedly connected to the top of the X-axis sliding bracket (3); the lifting platform (16) is slidably sleeved on the middle of the fixed bracket (14); the positioning plate (18) is fixedly connected to the inner side of the lifting platform (16); the linear shaft (17) passes through the interior of the positioning plate (18) for connecting to the fixed bracket (14); and the output end of the propulsion cylinder (15) is fixedly connected to the bottom of the positioning plate (18).

4. The large-caliber aluminum alloy pipe band double-head saw and internal and external grinding integrated machine according to claim 3, characterized in that: The intermittent dial assembly (6) comprises a limit housing (19), a rotating disk (20), a motor drive shaft (21), a limit ratchet (22), an engaging slide bar (23), a limit pawl (24), a connecting shaft (25) and a telescopic suction rod (26), wherein the motor drive shaft (21) is fixedly connected to the middle part of the rotating disk (20), the rotating disk (20) is rotatably connected to the inner side of the limit housing (19), the limit housing (19) is mounted on one side of the top of the lifting platform (16), the limit ratchet (22) is sleeved on the bottom of the motor drive shaft (21), the outer side of the engaging slide bar (23) is meshed with the outer teeth of the limit ratchet (22), one side of the limit pawl (24) is fixedly connected to the outer wall of the connecting shaft (25), the connecting shaft (25) is rotatably connected to the inside of the limit housing (19), and the telescopic suction rod (26) is mounted on the outer side of the rotating disk (20).

5. The large-caliber aluminum alloy pipe band double-head saw and internal and external grinding integrated machine according to claim 4, characterized in that: The telescopic suction rod (26) comprises a hydraulic cylinder (27), a hollow sleeve rod (28), an outer rod (29) and a magnet block (30); the hydraulic cylinder (27) is installed inside the hollow sleeve rod (28) for connecting to the outer rod (29); the outer rod (29) is slidably sleeved inside the hollow sleeve rod (28); and the magnet block (30) is fixedly connected to the outer side of the outer rod (29) for suctioning the metal saw disk.

6. The large-caliber aluminum alloy pipe band double-head saw and internal and external grinding integrated machine according to claim 4, characterized in that: A compression spring seat (31) is also fixedly connected to the interior of the limiting shell (19), and a protruding end of the compression spring seat (31) abuts against an outer wall surface of the limiting pawl (24).

7. The large-caliber aluminum alloy pipe band double-head saw and internal and external grinding integrated machine according to claim 5, characterized in that: A limit spring seat (32) is also provided on one side of the engagement slide bar (23), and two sides of the limit spring seat (32) are respectively fixedly connected to the engagement slide bar (23) and the opposite side surfaces of the limit shell (19).

8. The large-caliber aluminum alloy pipe band double-head saw and internal and external grinding integrated machine according to claim 3, characterized in that: The external gear flexible grinding assembly (7) comprises a mounting frame (33), a DC motor (34) and an external gear grinding disc (35); the mounting frame (33) is rotatably connected to the inner side of the top of the lifting platform (16); the DC motor (34) is mounted on one side of the mounting frame (33) for connecting to the external gear grinding disc (35); and the surface of the external gear grinding disc (35) is used for grinding the outer side of the saw disc.

9. The large-caliber aluminum alloy pipe band double-head saw and internal and external grinding integrated machine according to claim 1, characterized in that: A driving motor (36) and a bidirectional screw (37) are also provided on the inner side of the bottom of the double saw disc machine tool (1); the motor shaft of the driving motor (36) is fixedly connected to one end of the bidirectional screw (37) via a coupling; and the bidirectional screw (37) is threadedly sleeved on the inner side of the bottom of the X-axis sliding bracket (3).

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