Perforating machine for stainless steel pipe machining

Abstract

The invention relates to the technical field of machining equipment, in particular to a perforating machine for stainless steel pipe machining, which comprises a perforating drilling machine and a clamping device, the perforating drilling machine comprises a machine base, a stand column and a machine body, a liftable main shaft is slidably mounted in the machine body, a drill chuck is mounted at the lower end of the main shaft, and the main shaft is driven by a motor mounted on the rear side of the machine body; the motor is driven through a belt in a belt box above the machine body, a pressing wheel is rotatably installed on the right side of the machine body, the end, extending into the machine body, of a pressing wheel rotating shaft is rotatably connected with a pressing roller through an extension arm, a pressing plate is arranged at the bottom of a main shaft, and the circumferential outer wall of the pressing roller is pressed on the upper surface of the pressing plate. The clamping device comprises a top plate, a spring telescopic column, a top base, an upper clamping sleeve, a lower clamping sleeve, a base and a supporting table, and the supporting table is installed on a machine base of the trepanning drilling machine. The problems of positioning, deformation and efficiency in stainless steel pipe perforation are systematically solved through clamping, guiding and pressure balancing under the synergistic effect.

Description

Technical Field

[0001] The present invention relates to the technical field of machining equipment, and particularly to a piercing machine for processing stainless steel pipes. Background Art

[0002] Stainless steel pipes are widely used in fields such as petrochemical industry, medical devices, food processing, and architectural decoration due to their excellent corrosion resistance, high strength, and good processing performance. However, there are still some technical difficulties in the piercing process of stainless steel pipes.

[0003] The surface of stainless steel pipes is usually relatively smooth. Especially after high-precision polishing treatment, the friction coefficient between them and the fixture is relatively low, resulting in the traditional clamping device being difficult to provide sufficient clamping force. During high-speed or high-load piercing processing, the steel pipe is prone to sliding or offset, which not only affects the processing accuracy but may also cause tool wear or even tool breakage.

[0004] For stainless steel pipes with a relatively thin wall thickness (such as a wall thickness less than 2 mm), uneven radial force or local stress concentration during piercing processing may cause the pipe to collapse, ovalize, or wrinkle, resulting in a decrease in the finished product rate and an increase in the cost of subsequent straightening processes.

[0005] Therefore, there is an urgent need for a new type of piercing equipment for processing stainless steel pipes to solve the defects of the existing technology. Summary of the Invention

[0006] The purpose of the present invention is to provide a piercing machine for processing stainless steel pipes to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A piercing machine for stainless steel pipe processing, comprising a hole-opening drilling machine and a clamping device: The hole-opening drilling machine includes a machine base, a column, and a fuselage. A vertically movable main shaft is slidably installed inside the fuselage. A drill chuck is installed at the lower end of the main shaft. The main shaft is driven by a motor installed at the rear side of the fuselage. The motor is driven by a belt inside the belt box above the fuselage. A pressure wheel is rotatably installed on the right side of the fuselage. One end of the pressure wheel shaft extending into the interior of the fuselage is rotatably connected to a pressure roller through an extension arm. A pressure plate is provided at the bottom of the main shaft. The outer circumferential wall of the pressure roller is pressed against the upper surface of the pressure plate; The clamping device includes a top plate, a spring telescopic column, a top seat, an upper clamping sleeve, a lower clamping sleeve, a base, and a support platform. The support platform is installed on the machine base of the hole-opening drilling machine. The base is installed on the support platform. The lower clamping sleeve is detachably and fixedly installed on the base. The top plate is installed on the outer circumferential wall of a section of the main shaft extending out of the fuselage. The top seat is slidably installed directly below the top plate through a spring telescopic column. The upper clamping sleeve is detachably and fixedly installed at the bottom of the top seat; Semi-cylindrical pipe grooves are provided on the lower clamping sleeve and the upper clamping sleeve. After the lower clamping sleeve and the upper clamping sleeve are fitted together, a cylindrical pipe groove with the same diameter as the processed stainless steel pipe is formed. A vertically penetrating cutter head avoidance hole is provided at the center position of the upper clamping sleeve. The cutter head avoidance hole is used to avoid the hole-opening cutter clamped on the drill chuck.

[0009] Further, positioning card slots are provided on both the top seat and the base. The lower clamping sleeve and the upper clamping sleeve are in snap-fit with the positioning card slots. The outer contours of the lower clamping sleeves and upper clamping sleeves of different specifications are all of the same fixed size, and the diameters of the pipe grooves of the lower clamping sleeves and upper clamping sleeves of different specifications are different.

[0010] Further, the diameters of the cutter head avoidance holes on the upper clamping sleeves of different specifications are all of the same fixed size. A drill sleeve groove is provided at the top of the top seat. The cutter head avoidance hole and the drill sleeve groove are in plug-in fit with drill sleeves of different specifications. The outer diameters of the drill sleeves of different specifications are all of the same fixed size, and the inner diameters are of different sizes.

[0011] Further, a piercing machine for stainless steel pipe processing further includes a feeding device: The feeding device includes a guide rail, a driving workpiece clamping seat, and a driven workpiece clamping seat. The driving workpiece clamping seat and the driven workpiece clamping seat are both slidably installed on the guide rail through sliders at the bottom. The driving lead screw nut at the bottom of the driving workpiece clamping seat is in transmission connection with a driving lead screw. The clamping lead screw nut on the driven workpiece clamping seat is in transmission connection with a clamping lead screw. The driving lead screw is driven by a driving motor installed on the left side of the guide rail. The clamping lead screw is driven by a clamping motor installed on the right side of the guide rail; The guide rail, the driving lead screw, and the clamping lead screw are all located below the support platform. The driving workpiece clamping seat and the driven workpiece clamping seat cooperate to clamp both ends of the stainless steel pipe workpiece.

[0012] Further, handwheels are provided at the ends of both the clamping lead screw and the driving lead screw.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. When processing thin-walled steel pipes, the pipe grooves of the upper / lower clamping sleeves fully wrap the steel pipes, evenly distributing the radial stress to avoid local collapse; the buffering effect of the spring telescopic columns further reduces the impact deformation. By increasing the contact area through the matching pipe grooves of the upper / lower clamping sleeves and combining with the elastic clamping force of the spring telescopic columns, the friction force on the surface of the smooth steel pipe is significantly increased, solving the problem of insufficient clamping force of traditional fixtures. The circumferential clamping and drill sleeve guiding functions disperse the piercing stress, avoiding ovalization or wrinkling, and effectively solving the collapse problem of steel pipes with a wall thickness of <mm. The modular designed clamping sleeves and drill sleeves are adapted to the fixed clamping grooves through a unified outer diameter, enabling quick switching of specifications and strong adaptability. Through the synergistic effects of clamping, guiding, and pressure balance, the present invention systematically solves the positioning, deformation, and efficiency problems in the piercing of stainless steel pipes.

[0015] 2. During the processing of the present invention, the clamping motor drives the clamping lead screw to rotate, causing the clamping lead screw nut to drive the driven workpiece clamping seat to move along the guide rail until it is in close contact with and clamps the steel pipe. If fine adjustment is required, the handwheel can be manually rotated for precise locking. When the driving motor is started, it drives the driving lead screw to rotate, causing the driving lead screw nut to push the active workpiece clamping seat to move along the guide rail, thereby driving the axial feed of the steel pipe. During the movement of the steel pipe, it is assisted in positioning by the upper / lower clamping sleeves to ensure accurate piercing positions. Through the motor lead screw mechanism, the present invention realizes the precise, automatic, and stable feed of the workpiece. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a piercing machine for processing stainless steel pipes;

[0017] Figure 2 It is a schematic structural diagram during the processing of a piercing machine for processing stainless steel pipes;

[0018] Figure 3 It is a schematic structural diagram of an opening drill and a clamping device;

[0019] Figure 4 It is an exploded schematic structural diagram of an opening drill and a clamping device;

[0020] Figure 5 It is an exploded schematic structural diagram of the clamping device;

[0021] Figure 6 It is an exploded schematic structural diagram of the top seat;

[0022] Figure 7 It is a schematic structural diagram of the feeding device;

[0023] Figure 8 It is a partial structural schematic diagram of the left end of the feeding device;

[0024] Figure 9It is a partial structural schematic diagram of the right end of the feeding device.

[0025] In the figure: 1. Open-hole drill; 2. Clamping device; 3. Feeding device; 4. Workpiece; 5. Active workpiece clamping seat; 6. Driving lead screw; 7. Driving motor; 8. Clamping lead screw nut; 9. Driving lead screw nut; 10. Guide rail; 11. Slide seat; 12. Driven workpiece clamping seat; 13. Clamping lead screw; 14. Clamping motor; 15. Motor; 16. Belt box; 17. Machine body; 18. Pressure wheel; 19. Pressure roller; 20. Pressure plate; 21. Main shaft; 22. Drill chuck; 23. Top plate; 24. Spring telescopic column; 25. Top seat; 26. Upper clamping sleeve; 27. Lower clamping sleeve; 28. Base; 29. Support table; 30. Tool bit avoidance hole; 31. Drill sleeve groove; 32. Drill sleeve; 33. Handwheel. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1: Please refer to Figures 1 to 6, A piercing machine for stainless steel pipe processing, comprising a hole-opening drill 1 and a clamping device 2: The hole-opening drill 1 includes a machine base, a column, and a fuselage 17. A liftable main shaft 21 is slidably installed in the fuselage 17. A drill chuck 22 is installed at the lower end of the main shaft 21. The main shaft 21 is driven by a motor 15 installed at the rear side of the fuselage 17. The motor 15 is driven by a belt in a belt box 16 above the fuselage 17. A pressure wheel 18 is rotatably installed on the right side of the fuselage 17. One end of the rotating shaft of the pressure wheel 18 extending into the interior of the fuselage 17 is rotatably connected to a pressure roller 19 through an extension arm. A pressing plate 20 is provided at the bottom of the main shaft 21. The outer circumferential wall of the pressure roller 19 is pressed against the upper surface of the pressing plate 20; The clamping device 2 includes a top plate 23, a spring telescopic column 24, a top seat 25, an upper clamping sleeve 26, a lower clamping sleeve 27, a base 28, and a support platform 29. The support platform 29 is installed on the machine base of the hole-opening drill 1. The base 28 is installed on the support platform 29. The lower clamping sleeve 27 is detachably and fixedly installed on the base 28. The top plate 23 is installed on the circumferential outer wall of a section of the main shaft 21 extending out of the fuselage 17. The top seat 25 is slidably installed directly below the top plate 23 through the spring telescopic column 24. The upper clamping sleeve 26 is detachably and fixedly installed at the bottom of the top seat 25; Semi-cylindrical pipe grooves are provided on the lower clamping sleeve 27 and the upper clamping sleeve 26. After the lower clamping sleeve 27 and the upper clamping sleeve 26 are fitted together, a cylindrical pipe groove with the same diameter as the processed stainless steel pipe is formed. A vertically penetrating tool head avoidance hole 30 is provided at the center position of the upper clamping sleeve 26. The tool head avoidance hole 30 is used to avoid the hole-opening tool clamped on the drill chuck 22.

[0028] Positioning card slots are provided on both the top seat 25 and the base 28. The lower clamping sleeve 27 and the upper clamping sleeve 26 are in clamping fit with the positioning card slots. The outer contours of the lower clamping sleeves 27 and upper clamping sleeves 26 of different specifications are of the same fixed size, and the diameters of the pipe grooves of the lower clamping sleeves 27 and upper clamping sleeves 26 of different specifications are different.

[0029] The diameters of the tool head avoidance holes 30 on the upper clamping sleeves 26 of different specifications are of the same fixed size. A drill sleeve groove 31 is provided at the top of the top seat 25. The tool head avoidance hole 30 and the drill sleeve groove 31 are in plug-in fit with drill sleeves 32 of different specifications. The outer diameters of the drill sleeves 32 of different specifications are of the same fixed size and the inner diameters are of different sizes.

[0030] The working principle of this embodiment:

[0031] During processing, place the stainless-steel steel pipe in the semi-cylindrical pipe groove of the lower clamping sleeve 27. After starting the equipment, the main shaft 21 is driven by the motor 15 and moves downward through the belt box 16 transmission, driving the top plate 23 fixed thereon to press downward. The top plate 23 pushes the top seat 25 and the upper clamping sleeve 26 downward through the spring telescopic column 24, and closes with the lower clamping sleeve 27 to form a complete cylindrical pipe groove, and adaptively clamps the steel pipe through the elastic pressure of the spring telescopic column 24. After the clamping is completed, the main shaft 21 continues to move downward, driving the tool on the drill chuck 22 to pass through the tool head avoidance hole 30 of the upper clamping sleeve 26 to perforate the steel pipe. The tool is guided by the drill sleeve 32 to ensure the perpendicularity of the drilling; at the same time, the pressure wheel 18 applies a stable downward pressure to the pressure plate 20 through the pressure roller 19 to offset the axial reaction force during drilling and prevent the steel pipe from moving.

[0032] In this embodiment, when processing thin-walled steel pipes, the pipe grooves of the upper / lower clamping sleeves 26 / 27 fully wrap the steel pipes, evenly distribute the radial stress, and avoid local collapse; the buffering effect of the spring telescopic column 24 further reduces the impact deformation. By increasing the contact area through the matching pipe grooves of the upper / lower clamping sleeves 26 / 27 and combining with the elastic clamping force of the spring telescopic column 24, the friction force on the surface of the smooth steel pipe is significantly increased, and the problem of insufficient clamping force of the traditional fixture is solved. The circumferential clamping and the guiding function of the drill sleeve 32 disperse the perforation stress, avoid ovalization or wrinkling, and effectively solve the collapse problem of steel pipes with a wall thickness <2mm. The modular-designed clamping sleeves 26 / 27 and drill sleeves 32 are adapted to the fixed card slots through a unified outer diameter, quickly switch specifications, and have strong adaptability. This embodiment systematically solves the positioning, deformation, and efficiency problems in the perforation of stainless-steel steel pipes through the synergistic effects of clamping, guiding, and pressure balance.

[0033] Embodiment 2: Please refer to Figures 7 to 9 , a perforating machine for processing stainless-steel steel pipes, which is different from Embodiment 1 in that a perforating machine for processing stainless-steel steel pipes further includes a feeding device 3: The feeding device 3 includes a guide rail 10, a driving workpiece clamping seat 5 and a driven workpiece clamping seat 12. The driving workpiece clamping seat 5 and the driven workpiece clamping seat 12 are both slidably installed on the guide rail 10 through the slide seats 11 at the bottom. The driving lead screw nut 9 at the bottom of the driving workpiece clamping seat 5 is in transmission connection with the driving lead screw 6, and the clamping lead screw nut 8 on the driven workpiece clamping seat 12 is in transmission connection with the clamping lead screw 13. The driving lead screw 6 is driven by a driving motor 7 installed on the left side of the guide rail 10, and the clamping lead screw 13 is driven by a clamping motor 14 installed on the right side of the guide rail 10; The guide rail 10, the driving lead screw 6 and the clamping lead screw 13 are all located below the support table 29, and the driving workpiece clamping seat 5 and the driven workpiece clamping seat 12 cooperate to clamp both ends of the stainless-steel steel pipe workpiece 4.

[0034] Handwheels 33 are provided at the ends of both the clamping lead screw 13 and the driving lead screw 6.

[0035] The working principle of this embodiment:

[0036] During processing, the two ends of the stainless steel steel pipe workpiece 4 are respectively placed in the active workpiece clamping seat 5 and the driven workpiece clamping seat 12. Start the clamping motor 14 to drive the clamping lead screw 13 to rotate, so that the clamping lead screw nut 8 drives the driven workpiece clamping seat 12 to move along the guide rail 10 until it is in close contact with and clamps the steel pipe 4. If fine adjustment is required, the handwheel 33 can be manually rotated for precise locking. Start the driving motor 7 to drive the driving lead screw 6 to rotate, so that the driving lead screw nut 9 pushes the active workpiece clamping seat 5 to move along the guide rail 10, thereby driving the axial feed of the steel pipe 4. During the movement of the steel pipe 4, it is assisted in positioning by the upper / lower clamping sleeves 26 / 27 to ensure accurate piercing position.

Claims

1. A punching machine for stainless steel pipe processing, characterized in that: The invention comprises a hole drilling machine (1) and a clamping device (2): The hole drilling machine (1) comprises a machine base, a column and a machine body (17). A main shaft (21) which can be raised and lowered is slidably installed in the machine body (17). A drill chuck (22) is installed at the lower end of the main shaft (21). The main shaft (21) is driven by a motor (15) installed at the rear side of the machine body (17). The motor (15) is driven by a belt in a belt box (16) above the machine body (17). A pressure wheel (18) is rotatably installed on the right side of the machine body (17). One end of the pressure wheel (18) shaft extending into the machine body (17) is rotatably connected to a pressure roller (19) through an extension arm. A pressure plate (20) is provided at the bottom of the main shaft (21). The circumferential outer wall of the pressure roller (19) is pressed on the upper surface of the pressure plate (20). The clamping device (2) comprises a top plate (23), a spring telescopic column (24), a top seat (25), an upper clamping sleeve (26), a lower clamping sleeve (27), a base (28), and a support platform (29). The support platform (29) is mounted on the base of the drilling machine (1). The base (28) is mounted on the support platform (29). The lower clamping sleeve (27) is detachably fixedly mounted on the base (28). The top plate (23) is mounted on the circumferential outer wall of a section of the main shaft (21) extending out of the machine body (17). The top seat (25) is retractable by the spring. The column (24) is slidably mounted just below the top plate (23), and the upper clamping sleeve (26) is detachably fixedly mounted on the bottom of the top seat (25); a semi-cylindrical pipe groove is provided on the lower clamping sleeve (27) and the upper clamping sleeve (26); after the lower clamping sleeve (27) and the upper clamping sleeve (26) are fitted together, a cylindrical pipe groove having the same diameter as the stainless steel pipe being processed is formed; a vertically penetrating cutter head avoidance hole (30) is provided at the center of the upper clamping sleeve (26); the cutter head avoidance hole (30) is used to avoid a hole-opening tool clamped on the drill chuck (22).

2. A punching machine for stainless steel pipe processing according to claim 1, characterized in that: The top seat (25) and the base (28) are both provided with positioning slots, and the lower clamping sleeve (27) and the upper clamping sleeve (26) are engaged with the positioning slots. The outer contours of the lower clamping sleeves (27) and the upper clamping sleeves (26) of different specifications are all of the same fixed size, and the pipe groove diameters of the lower clamping sleeves (27) and the upper clamping sleeves (26) of different specifications are different.

3. A punching machine for stainless steel pipe processing according to claim 1, characterized in that: The diameters of the cutter head avoidance holes (30) on the upper clamping sleeves (26) of different specifications are all of the same fixed size. A drill sleeve groove (31) is provided on the top of the top seat (25). The cutter head avoidance holes (30) and the drill sleeve groove (31) are plugged and matched with drill sleeves (32) of different specifications. The outer diameters of the drill sleeves (32) of different specifications are all of the same fixed size, and the inner diameters are of different sizes.

4. A punching machine for stainless steel pipe processing according to claim 3, characterized in that: Also includes a feeding device (3): The feeding device (3) comprises a guide rail (10), an active workpiece clamping seat (5) and a driven workpiece clamping seat (12); the active workpiece clamping seat (5) and the driven workpiece clamping seat (12) are both slidably mounted on the guide rail (10) via a slide seat (11) at the bottom; a driving screw nut (9) at the bottom of the active workpiece clamping seat (5) is transmission-connected to the driving screw (6); a clamping screw nut (8) on the driven workpiece clamping seat (12) is transmission-connected to the clamping screw nut (8) on the driven workpiece clamping seat (12) The guide rail (10), the driving screw (6) and the clamping screw (13) are connected by transmission, the driving screw (6) is driven by a driving motor (7) installed on the left side of the guide rail (10), and the clamping screw (13) is driven by a clamping motor (14) installed on the right side of the guide rail (10); the guide rail (10), the driving screw (6) and the clamping screw (13) are all located below the support platform (29), and the active workpiece clamping seat (5) and the driven workpiece clamping seat (12) cooperate to clamp the two ends of the stainless steel pipe workpiece (4).

5. A punching machine for stainless steel pipe processing according to claim 4, characterized in that: Hand wheels (33) are provided at the ends of the clamping screw (13) and the driving screw (6).

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