Automatic pipe drilling and cutting device

Abstract

The present application relates to the field of pipe processing equipment, and discloses a kind of pipe automatic drilling cutting equipment, including workbench, be set to workbench and be used to realize pipe clamping, rotation and translation cooperation module and be set to workbench along the cutting assembly of perpendicular to pipe translation direction movement, workbench is moved and is set to the side surface of cutting assembly with the drilling assembly of parallel with the movement direction of cutting assembly;Cooperation module includes two guide sliding in workbench arm assembly, the first drive unit of control arm assembly relative close or far away and the second drive unit of control entire cooperation module along the axial translation of pipe;Arm assembly includes arm and rotation setting in the center positioning tensioning assembly of arm clamping side, on one of the arms on the side away from clamping side is equipped with the drive component of the center positioning tensioning assembly on this arm, rotates, this equipment has cutting and drilling function, can significantly reduce the total cost of equipment.

Description

Technical Field

[0001] This invention relates to the field of pipe processing equipment, and more particularly to an automatic drilling and cutting device for pipes. Background Technology

[0002] The production process of tubular parts for automobiles involves drilling and cutting. Drilling and cutting are generally divided into two steps, which are achieved by using pipe cutting equipment and drilling equipment respectively.

[0003] Before operation, both general drilling and pipe cutting equipment require a clamp to position the pipe. The structure of the positioning pipe is similar on both machines. Taking the pipe cutting equipment as an example, one can refer to a thin film pipe cutting machine disclosed in Chinese Patent No. CN211517655U. The pipe cutting machine includes a frame, a three-jaw chuck mounted on the frame, and a cutting mechanism that slides along the axial direction of the pipe. The three-jaw chuck is the clamp used to position the pipe.

[0004] Three-jaw chucks are used for radially limiting pipe fittings. The clamping or releasing of the three-jaw chuck requires the use of three jaws and a drive mechanism that drives the three jaws to move closer or further away synchronously. Due to differences in the internal structure of the chuck, existing drive mechanisms include motors and cylinders. The rotation of the three-jaw chuck is achieved by a separate drive motor. The axial limiting of the pipe fitting is achieved by changing the distance between the two three-jaw chucks. In existing structures, one three-jaw chuck is fixed horizontally, while the other three-jaw chuck can move closer to or further away from the fixed three-jaw chuck using a screw slide assembly, thereby achieving axial limiting of the pipe fitting.

[0005] The cutting and drilling of existing pipe fittings require different equipment. Each piece of equipment needs to be equipped with a mating component to achieve the functions of clamping, rotating and moving the pipe fittings, resulting in a high total equipment cost. In addition, the mating component needs to use four sets of drive mechanisms to achieve the clamping, rotating and moving of the pipe fittings. These include a drive mechanism to control the rotation of the three-jaw chuck, two drive mechanisms to control the clamping of the two three-jaw chucks, and a drive mechanism to control the horizontal movement of the three-jaw chuck. The large number of drive mechanisms further increases the total cost of the setup. Summary of the Invention

[0006] This invention addresses the drawback of existing pipe drilling and cutting methods that require different equipment, each with its own components, resulting in high overall equipment costs. It provides an automatic pipe drilling and cutting device that effectively reduces the total cost.

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

[0008] An automatic drilling and cutting device for pipe fittings includes a worktable, a mating module disposed on the worktable for clamping, rotating and translating the pipe fittings, and a cutting component disposed on the worktable and moving perpendicular to the translation direction of the pipe fittings. A drilling component is disposed on the side of the cutting component on the worktable and is parallel to the movement direction of the cutting component.

[0009] The mating module includes two guide arms that slide on the worktable, a first drive unit that controls the relative proximity or distance of the clamp arms, and a second drive unit that controls the axial translation of the entire mating module along the pipe fitting.

[0010] The clamping arm assembly includes clamping arms and a center positioning tensioning assembly rotatably disposed on the clamping side of the clamping arms. A drive component that drives the center positioning tensioning assembly on one of the clamping arms to rotate is mounted on the side away from the clamping side.

[0011] The center positioning tensioning assembly includes a mandrel that is axially sealed and expands and contracts along the clamping side of the pipe fitting, at least two tensioning members that are circumferentially spaced around the outer wall of the mandrel and elastically expand and contract along the radial side of the mandrel, and a drive sleeve that is sleeved outside the mandrel and axially sealed and expands and contracts along the clamping side of the pipe fitting. A pressing member that protrudes out of the side wall of the drive sleeve and is pressed against by the pipe fitting is fixed on the outer wall of the mandrel.

[0012] When the pipe fitting presses against the clamping element, the mandrel retracts towards the clamping arm. The movement of the mandrel causes a change in the air pressure inside the clamping arm, which causes the drive sleeve to extend away from the clamping arm and insert between the tensioning element and the mandrel. The tensioning element moves outward along the radial direction of the mandrel and presses against the inner wall of the pipe fitting.

[0013] The above solution has several advantages. First, by integrating the cutting and drilling components onto a single workbench and sharing a single mating module, the number of mating modules can be reduced, thereby lowering the overall cost. The movement of the cutting and drilling components is independently controlled, allowing for program-based selection of cutting and drilling operations. Second, the clamping arm assembly within the mating module is improved by adding a central positioning tensioning component. This component is driven by a drive unit and can rotate. Within the central positioning tensioning component, both the tensioning element and the pressing element are mounted on the mandrel. The tensioning element extends and retracts radially along the mandrel and the tubing, while the pressing element drives the mandrel and... The tensioning element extends and retracts along the product's axial direction. The drive sleeve retracts and extends in response to the extension and retraction of the mandrel. When extended, the drive sleeve can be inserted between the tensioning element and the mandrel to achieve outward expansion of the tensioning element. Therefore, when the clamping arm is relatively close to the clamping arm fitting, the pressing element is pressed against the end of the fitting, carrying the mandrel back towards the clamping arm. The drive sleeve extends outward and drives the tensioning element to extend outward and press against the inner ring wall of the fitting, thereby achieving axial and radial limiting of the fitting within a certain diameter range. Compared with the prior art, this clamping arm assembly can reduce the number of drive components used to achieve radial limiting of the fitting. The above improvements can significantly reduce the total equipment cost.

[0014] Preferably, the clamping end of the clamping arm is rotatably provided with a mounting blind cylinder with an opening facing the clamping end. The mounting blind cylinder forms a first mating groove and a second mating groove that are concentrically distributed and of different sizes for the sealing and extension of the drive sleeve and the mandrel, respectively. An air passage is provided between the side walls of the first mating groove and the second mating groove near the bottom of the groove, and a first elastic element is provided between the second mating groove and the mandrel to drive the mandrel to extend outward.

[0015] Using the above scheme, the structure of the blind cylinder is used to realize that when the mandrel extends or retracts, the second mating groove injects air into the first mating groove, thereby causing the drive tube sleeve to extend. The first elastic element is used to realize that the mandrel is in a retracted state and the drive tube sleeve is in a retracted state under normal conditions.

[0016] Preferably, the pressing component includes a pressing ring sleeved outside the drive tube sleeve, and connecting posts whose two ends are respectively connected to the middle of the inner ring wall of the pressing ring and the outer wall of the mandrel. At least two connecting posts are evenly spaced around the circumference of the pressing ring, and a clearance groove is provided on the outer wall of the drive tube sleeve for the connecting posts to pass through and move along the axial direction of the mandrel.

[0017] Using the above scheme, the pressure ring is assembled with the mandrel through the connecting post.

[0018] Preferably, the tensioning component includes a tensioning semi-ring located outside the mandrel, a telescopic rod with one end fixed to the middle of the inner ring wall of the tensioning semi-ring and the other end inserted into the side wall of the mandrel, and a limiting block that restricts the telescopic rod from detaching from the mandrel. An elastic pull member is provided between the limiting block and the mandrel to drive the telescopic rod to be in a retracted state in the normal state.

[0019] Preferably, the end of the drive sleeve away from the clamping arm is a truncated cone with the tip pointing outwards, and the tip has several clearance grooves along its circumference for the telescopic rod to pass through.

[0020] Preferably, the inner ring wall of the tensioning half-ring near the clamping arm is configured as a conical ring to facilitate the insertion of the tip of the drive sleeve.

[0021] Preferably, an elastic layer for increasing damping is fixed on the outer ring wall of the tensioning semi-ring.

[0022] Preferably, the first drive unit includes two mounting seats that slide along the moving direction of the pipe fitting, a lead screw that is rotatably engaged with a mounting seat at both ends, and a first drive motor mounted on a mounting seat for driving the lead screw to rotate. The lead screw includes two threaded sections with opposite thread directions. A mating block is fixed at the bottom of each of the two clamping arms. The two mating blocks have nuts that engage with the threaded sections and are screwed onto the threaded sections respectively.

[0023] Using the above scheme, as the first drive motor rotates, the two mating blocks can move closer or further apart, thereby enabling the two clamping arm assemblies to move closer or further apart.

[0024] Preferably, the second drive unit includes a fixed base fixedly installed on the bottom of the workbench, a first lead screw rotating between the two fixed bases, and a second motor installed on a fixed base for driving the first lead screw to rotate. A connecting plate is connected between the two mounting bases, and a mating plate is fixed to the bottom of the connecting plate. A nut that is screwed to the first lead screw is mounted on the mating plate.

[0025] Using the above scheme, as the second drive motor rotates, the mating block can move along the direction of pipe movement, thereby enabling the entire mating assembly to move along the direction of pipe movement.

[0026] This invention, by adopting the above technical solutions, has significant technical effects:

[0027] 1. The cutting and drilling components are integrated on a single worktable. The movement of the cutting and drilling components is independently controlled. The cutting and drilling operations can be selected using program control. The cutting and drilling components share a set of mating modules, which reduces the number of mating module sets and thus reduces the overall cost.

[0028] 2. An improvement is made to the clamping arm assembly in the mating module. A center positioning tensioning component is added to the clamping arm assembly. This center positioning tensioning component can rotate under the drive of the drive component. In the center positioning tensioning component, the tensioning element and the pressing element are both mounted on the mandrel. The tensioning element extends and retracts radially along the mandrel and the tube, while the pressing element can drive the mandrel and the tensioning element to extend and retract axially along the product. The drive sleeve retracts and extends in response to the extension and retraction of the mandrel. When the drive sleeve extends, it can be inserted between the tensioning element and the mandrel to realize the outward expansion of the tensioning element. Therefore, when the clamping arm is relatively close to the clamping arm tube, the pressing element is pressed by the end of the tube and carries the mandrel to retract towards the clamping arm. The drive sleeve extends outward and drives the tensioning element to extend outward and press against the inner ring wall of the tube, realizing the axial and radial limitation of the tube within a certain diameter range. Compared with the prior art, this clamping arm assembly can reduce the drive component used to realize the radial limitation of the tube. The above improvement can significantly reduce the total equipment cost. Attached Figure Description

[0029] Figure 1 This is an isometric view of an automatic pipe drilling and cutting device according to this embodiment;

[0030] Figure 2 This is a front view of an automatic pipe drilling and cutting device according to this embodiment;

[0031] Figure 3 This is an isometric view of the clamping arm assembly in this embodiment when it is not clamping the pipe.

[0032] Figure 4 This is an isometric view of the clamping arm assembly in this embodiment when clamping the pipe fitting;

[0033] Figure 5 This is a top view of the clamping arm assembly in this embodiment when it clamps the pipe fitting;

[0034] Figure 6 yes Figure 5 A sectional view of AA;

[0035] Figure 7 yes Figure 6 A cross-sectional view of BB.

[0036] The parts referred to by the numbers in the above attached figures are as follows: 1. Workbench; 101. Slotting; 2. Cutting machine; 3. Drilling machine; 4. Clamping arm; 5. Third drive motor; 6. Guide rail; 7. Slider; 8. Mounting base; 9. First drive motor; 10. Lead screw; 1001. Threaded section; 1002. Smooth section; 11. Fixed base; 12. First lead screw; 13. Second drive motor; 14. Connecting plate; 15. Mating plate; 16. Mating block; 17. Bearing; 18. Mounting blind cylinder; 19. Mandrel; 20. Pressure ring; 21. Drive sleeve; 211. Clearance groove; 212. Avoidance groove; 22. Tensioning half ring; 23. Nut; 24. First mating groove; 25. Second mating groove; 26. Air passage; 27. Connecting column; 28. Limiting block; 29. ​​First elastic element; 30. Telescopic rod; 31. Elastic pull element. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0038] An automatic drilling and cutting device for pipe fittings, as described in the following description. Figures 1-7 As shown, it includes a worktable 1, a mating module disposed on the worktable 1 for clamping, rotating and translating, and a cutting assembly and a drilling assembly disposed on the worktable 1 that move perpendicular to the translation direction of the pipe. In this embodiment, there are two sets of drilling assemblies, which are respectively located on both sides of the cutting assembly.

[0039] The cutting assembly includes a cutting machine 2 and a lead screw slide assembly that drives the cutting machine 2 forward and backward; the drilling assembly includes a drilling machine 3 and a lead screw slide assembly that drives the drilling machine 3 forward and backward. Both the cutting machine 2 and the drilling machine 3 are existing equipment, and this application does not improve their structures; therefore, their structures will not be described in detail. The lead screw slide assembly is also prior art, including a guide assembly, a lead screw pair assembly, and a drive motor; specific details will also not be described in detail.

[0040] The structural improvement in this application is a mating module, which includes two guide arm assemblies that slide on the worktable 1. Two guide rails 6 are arranged in parallel on the worktable 1. A slot 101 is opened between the two guide rails 6 on the worktable 1. A base plate is provided at the bottom of the clamping arm assembly. Two sliders 7 that are embedded in the guide rails 6 and guided to slide are fixed at the bottom of the base plate. The two clamping arm assemblies can move closer or further away from each other and are controlled by the first drive unit. The two clamping arm assemblies can also move synchronously along the axial direction of the pipe and are controlled by the second drive unit.

[0041] The first drive unit includes two mounting seats 8 that slide along the moving direction of the pipe fitting, a lead screw 10 that is rotatably engaged with a mounting seat 8 at both ends, and a first drive motor 9 mounted on a mounting seat 8 for driving the lead screw 10 to rotate. The upper end of the mounting seat 8 passes through the slot 101 and is embedded in the two guide rails 6 for guidance and sliding. The lead screw 10 includes a smooth rod section 1002 in the middle and threaded sections 1001 located at both ends of the smooth rod section 1002 with opposite thread directions. A mating block 16 is vertically fixed to the bottom of the base plate of each of the two clamping arms 4. Nuts 23 that mate with the threaded sections 1001 are fixed on the two mating blocks 16, and the two mating blocks 16 are respectively screwed onto a threaded section 1001.

[0042] The second drive unit includes a fixed base 11 fixedly installed at the bottom of the workbench 1, a first lead screw 12 rotating between the two fixed bases 11, and a second motor installed on a fixed base 11 for driving the first lead screw 12 to rotate. A connecting plate 14 is connected between the two mounting bases 8. A mating plate 15 is fixed at the bottom of the connecting plate 14. A nut that is screwed to the first lead screw 12 is mounted on the mating plate 15.

[0043] Combination Figures 3-7 As shown, the clamping arm assembly includes a clamping arm 4 and a center positioning tensioning component rotatably disposed on the clamping side of the clamping arm 4. The bottom is fixed to the bottom of the clamping arm 4. On one of the clamping arms 4, on the side away from the clamping side, a driving component is installed to drive the center positioning tensioning component on the clamping arm 4 to rotate. The driving component is a third drive motor 5.

[0044] A mounting blind cylinder 18 with an opening facing the clamping end is rotatably mounted on the clamping arm 4 via a bearing 17. The mounting blind cylinder 18 has a concentric tube at its center. A first mating groove 24 and a second mating groove 25, which are concentric and of different sizes, are formed between the mounting blind cylinder 18 and the concentric tube. The opening diameter of the first mating groove 24 and the second mating groove 25 is smaller than the inner diameter. An air passage 26 is provided between the side walls of the first mating groove 24 and the second mating groove 25 near the bottom of the groove.

[0045] The center positioning tensioning assembly includes a core rod 19 that is axially sealed and expands and contracts within the second mating groove 25, two tensioning members that are circumferentially spaced around the core rod 19 and expand and contracts radially along the core rod 19, and a drive sleeve 21 that is sleeved outside the core rod 19 and axially sealed and expands and contracts within the first mating groove 24. Both the core rod 19 and the drive sleeve 21 partially extend outside the clamping arm 4. A first elastic member 29, which is a spring, is provided between the second mating groove 25 and the core rod 19 to drive the core rod 19 to extend outward. A pressing member that extends outward to the side wall of the drive sleeve 21 and is pressed against by the pipe is fixed on the outer ring wall of the core rod 19 outside the clamping arm 4.

[0046] The tensioning element is located on the side of the pressing element away from the clamping arm 4. The tensioning element includes a tensioning half-ring 22 located outside the mandrel 19, a telescopic rod 30 with one end fixed to the middle of the inner ring wall of the tensioning half-ring 22 and the other end inserted into the side wall of the mandrel 19, and a limiting block 28 located inside the mandrel 19 to limit the telescopic rod 30 from disengaging from the mandrel 19. An elastic pull member 31 is provided between the limiting block 28 and the mandrel 19 to drive the telescopic rod 30 to be in a retracted state in the normal state. The elastic pull member 31 is a spring. An elastic layer for increasing damping is fixed on the outer ring wall of the tensioning half-ring 22. The elastic layer is a rubber layer.

[0047] The pressing component includes a pressing ring 20 sleeved outside the drive tube sleeve 21, and connecting posts 27 whose two ends are respectively connected to the middle of the inner ring wall of the pressing ring 20 and the outer wall of the mandrel 19. Two connecting posts 27 are evenly spaced around the circumference of the pressing ring 20. The pressing ring 20 and the connecting posts 27 are provided with through holes, and the outer wall of the mandrel 19 is provided with threaded holes. Bolts pass through the pressing ring 20 and the connecting posts 27 in sequence and are screwed and locked to the mandrel 19. The outer wall of the drive tube sleeve 21 is provided with a relief groove 211 for the connecting posts 27 to pass through and move along the axial direction of the mandrel 19. The end of the drive tube sleeve 21 away from the clamping arm 4 is shaped like a frustum with the tip pointing outwards, and the tip is provided with several clearance grooves 212 along its own circumference for the telescopic rod 30 to pass through. The inner ring wall of the tensioning half ring 22 near the clamping arm 4 is set into a conical ring shape to facilitate the tip of the drive tube sleeve 21 to be inserted.

[0048] Material is fed to the mating module using either a robotic arm or manual feeding, preferably a robotic arm. When the robotic arm places the pipe fitting between the two clamping arm assemblies, the first drive motor 9 starts, and the clamping arms 4 move closer together. After the mandrel 19 is inserted into the end of the pipe fitting, the robotic arm releases the pipe fitting. As the clamping arms 4 continue to move closer, the end of the pipe fitting contacts the pressure ring 20. The mandrel 19, due to the relative proximity of the clamping arms 4, is pressed against the clamping arms 4 and retracts towards the clamping arms 4. The second mating groove 25 moves towards the first mating groove 2. 4. Inject air into the tube, and drive the sleeve 21 to extend outward. The tip of the sleeve 21 is inserted between the tensioning half-ring 22 and the mandrel 19, causing the tensioning half-ring 22 to open outward and press against the inner ring wall of the tube. The clamping arm 4 is used to limit the axial displacement of the tube, while the tensioning half-ring 22 is used to limit the radial and circumferential displacement of the tube, thereby limiting the tube. Under the drive of the second drive motor 13, the tube moves in translation, and under the drive of the third drive motor 5, the tube rotates.

[0049] The starting and closing motors of the cutting machine 2, the starting and closing motors of the drilling machine 3, the drive motor that controls the translation of the cutting machine 2, the drive motor that controls the translation of the drilling machine 3, the first drive motor 9, the second drive motor 13, and the third drive motor 5 are all controlled by the PLC. The starting and closing sequence, forward and reverse switching, and speed changes of the above motors are realized by the existing logic programming of the PLC.

[0050] The automatic drilling and cutting equipment for pipe fittings integrates the drilling machine 3 and the cutting machine 2 on a single workbench 1. By sharing a set of mating modules, the total cost of the equipment is reduced. In the mating module, a center positioning tensioning component is added to the clamping arm 4. The relative proximity of the clamping arms 4 is used to limit the axial, circumferential and radial movement of the pipe fittings, reducing the number of drive components and further reducing costs.

[0051] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An automatic drilling and cutting device for pipe fittings, comprising a worktable (1), a mating module disposed on the worktable (1) for clamping, rotating and translating the pipe fittings, and a cutting assembly disposed on the worktable (1) and moving perpendicular to the translational direction of the pipe fittings, characterized in that: A drilling assembly is provided on the side of the cutting assembly on the worktable (1) and is parallel to the moving direction of the cutting assembly. The mating module includes two guide sliding clamping arm assemblies on the worktable (1), a first drive unit that controls the clamping arm assemblies to move closer or further away from each other, and a second drive unit that controls the entire mating module to translate along the axial direction of the pipe fitting. The clamping arm assembly includes a clamping arm (4) and a center positioning tensioning component rotatably disposed on the clamping side of the clamping arm (4). A drive component for driving the center positioning tensioning component on the clamping arm (4) to rotate is installed on one of the clamping arms (4) on the side away from the clamping side. The center positioning tensioning assembly includes a mandrel (19) that is axially sealed and telescopically telescopic on the clamping side of the clamping arm (4), at least two tensioning members that are circumferentially and evenly spaced around the outer wall of the mandrel (19) and are radially elastically telescopic, and a drive sleeve (21) that is sleeved outside the mandrel (19) and axially sealed and telescopically telescopic on the clamping side of the clamping arm (4). A pressing member that protrudes out to the side wall of the drive sleeve (21) and is pressed against by the pipe is fixed on the outer wall of the mandrel (19). When the pipe fitting presses against the pressure member, the mandrel (19) retracts towards the clamping arm (4). The movement of the mandrel (19) causes the air pressure inside the clamping arm (4) to change, causing the drive sleeve (21) to extend away from the clamping arm (4) and insert between the tensioning member and the mandrel (19). The tensioning member moves outward along the radial direction of the mandrel (19) and presses against the inner wall of the pipe fitting. The clamping end of the clamping arm (4) is rotatably provided with an installation blind cylinder (18) with its opening facing the clamping end. The installation blind cylinder (18) forms a first mating groove (24) and a second mating groove (25) that are concentrically distributed and of different sizes for sealing and telescopic extension of the drive sleeve (21) and the core rod (19). An air passage (26) is provided between the side walls of the first mating groove (24) and the second mating groove (25) near the bottom of the groove, and a first elastic element (29) is provided between the second mating groove (25) and the core rod (19) to drive the core rod (19) to extend outward. The pressing component includes a pressing ring (20) sleeved outside the drive tube sleeve (21), and connecting posts (27) whose two ends are respectively connected to the middle of the inner ring wall of the pressing ring (20) and the outer wall of the mandrel (19). At least two connecting posts (27) are evenly spaced around the circumference of the pressing ring (20). The outer wall of the drive tube sleeve (21) is provided with a relief groove (211) through which the connecting posts (27) can pass and move along the axial direction of the mandrel (19). The tensioning component includes a tensioning half-ring (22) located outside the mandrel (19), a telescopic rod (30) with one end fixed to the middle of the inner ring wall of the tensioning half-ring (22) and the other end inserted into the side wall of the mandrel (19), and a limiting block (28) that restricts the telescopic rod (30) from disengaging from the mandrel (19). An elastic puller (31) is provided between the limiting block (28) and the mandrel (19) to drive the telescopic rod (30) to be in a retracted state in the normal state. The end of the drive sleeve (21) away from the clamp arm (4) is a truncated cone with the tip pointing outwards, and the tip is provided with several clearance grooves (212) along its own circumference for the telescopic rod (30) to pass through.

2. The automatic drilling and cutting device for pipe fittings according to claim 1, characterized in that: The inner ring wall of the tensioning half ring (22) near the clamping arm (4) is configured as a conical ring to facilitate the insertion of the tip of the drive sleeve (21).

3. The automatic drilling and cutting device for pipe fittings according to claim 1, characterized in that: An elastic layer for increasing damping is fixed on the outer ring wall of the tensioned semi-ring (22).

4. The automatic drilling and cutting device for pipe fittings according to claim 1, characterized in that: The first drive unit includes two mounting seats (8) that slide along the moving direction of the pipe fitting, a lead screw (10) with both ends rotatably engaged with a mounting seat (8), and a first drive motor (9) mounted on a mounting seat (8) for driving the lead screw (10) to rotate. The lead screw (10) includes two threaded sections (1001) with opposite thread directions. A mating block (16) is fixed at the bottom of each of the two clamping arms (4). The two mating blocks (16) are equipped with nuts (23) that mate with the threaded sections (1001) and are screwed onto the threaded sections (1001) respectively.

5. The automatic drilling and cutting device for pipe fittings according to claim 4, characterized in that: The second drive unit includes a fixed base (11) fixedly installed at the bottom of the workbench (1), a first lead screw (12) rotating between the two fixed bases (11), and a second motor installed on a fixed base (11) for driving the first lead screw (12) to rotate. A connecting plate (14) is connected between the two mounting bases (8). A mating plate (15) is fixed at the bottom of the connecting plate (14). A nut that is screwed to the first lead screw (12) is assembled on the mating plate (15).

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