A laser cutting machine and process based on hardware fitting machining

Abstract

The application relates to the technical field of laser cutting and discloses a laser cutting machine based on hardware accessory machining and a process, wherein the laser cutting machine based on hardware accessory machining comprises a laser cutting machine main body, a support pipe shaft center is aligned with a front chuck main shaft box shaft center, two sleeve rings are fixedly arranged on the outer wall of one end of the support pipe close to the laser cutting machine main body in an axial direction, a plurality of jacks are slidably arranged on the sleeve rings in a ring shape and at equal intervals, two round rods are fixedly connected to a transmission rod, a plurality of jacking grooves are formed in the round rods, and the jacking grooves drive the jacks to move in a radial direction when the round rods move. A plurality of groups of jacks are synchronously expanded outward, uniform support limiting of the inner wall of a pipe is formed, the abutting force of an external clamping mechanism is reduced, the top jacks are actively avoided from the laser focal point through linkage cooperation of the let-in grooves and the connecting rods, interference between components and laser is avoided, and extrusion deformation and heat deformation of the thin-wall pipe are effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, and in particular to a laser cutting machine and process for processing hardware parts. Background Technology

[0002] In the field of hardware parts processing, laser cutting equipment is widely used due to its advantages such as high processing precision and narrow kerf. In the processing of tubular workpieces, the equipment is usually equipped with a clamping mechanism that forms a tight contact with the outer wall of the tubing. It relies on friction to transmit motion torque and feed force, thereby driving the tubing to perform radial rotation and axial feed motion to complete various feature cuts in the circumferential and length directions of the tubing.

[0003] However, the aforementioned clamping method faces significant challenges when machining thin-walled tubes. Thin-walled tubes have low radial structural stiffness. When the clamping mechanism applies a force sufficient to meet motion transmission requirements, the tube wall is prone to localized plastic deformation at the clamping point, manifesting as out-of-roundness of the tube end, surface indentations, or even tube wall collapse, directly impacting the finished product yield of the machined parts. Furthermore, because the clamping position is close to the laser cutting area, the high temperatures generated during the cutting process cause a sharp decrease in the yield strength of the tube material near the cut. Under the combined effect of clamping forces, this localized heat-affected zone further exacerbates the tube wall deformation tendency, making the yield problem even more pronounced.

[0004] To address the aforementioned issues, existing technologies include improved solutions such as using fan-shaped jaws to increase the contact area and disperse the clamping force, or inserting a simple mandrel inside the tube for auxiliary support. However, increasing the contact area does not fundamentally change the mechanical mode of the clamping force acting from the outside in on the thin-walled tube, and there is still a risk of deformation for extremely thin tubes. Inserting a simple mandrel poses a risk of interference with the laser cutting point and cannot adaptively adjust the support position as the cutting process progresses, limiting its effectiveness in actual continuous production. Summary of the Invention

[0005] In view of the problem that existing technologies can easily cause deformation when the clamping mechanism applies pressure to the outside of the tube during laser cutting of thin-walled tubes, a laser cutting machine based on hardware parts processing is proposed.

[0006] Its purpose is to provide uniform abutment support to the inner wall of the pipe to be cut, reduce the abutment force of the existing clamping mechanism, avoid clamping deformation, and at the same time, the inner wall abutment component can adaptively avoid the laser focus according to the cutting state.

[0007] The technical solution of this invention is a laser cutting machine based on the processing of hardware parts, including a laser cutting machine body and a fixing frame fixedly installed on the side wall of the front chuck spindle box of the laser cutting machine body. A fixing plate is fixedly connected to the other end of the fixing frame. A support tube is slidably arranged transversely through the fixing plate. The axis of the support tube is aligned with the axis of the front chuck spindle box. Two collars are axially fixedly arranged on the outer wall of the end of the support tube near the laser cutting machine body. Multiple top supports are slidably arranged in a ring at equal intervals on the collars. Multiple sliding plates are axially slidably connected to the collar near the fixing plate. The sliding plates slide in cooperation with the corresponding top supports. An electric push rod is fixedly installed on the side of the fixed plate away from the main body of the laser cutting machine. The output end of the electric push rod is rotatably connected to a transmission rod. The transmission rod is set inside the support tube, and two round rods are fixedly connected to the transmission rod. Multiple lifting grooves are opened on the round rods. When the round rods move, the lifting grooves drive the top support to move radially. A movable ring is rotatably connected to the outer wall of the support tube near the main body of the laser cutting machine. A counterweight is fixedly connected below the movable ring. A clearance groove is opened on the movable ring. The clearance groove is composed of an arc groove and a connected trapezoidal groove. A connecting rod is fixedly connected to the sliding plate. The other end of the connecting rod is slidably engaged with the clearance groove.

[0008] Furthermore, the top support includes a connecting plate, which is slidably connected to a corresponding sliding plate or collar. A base is fixedly connected to one end of the connecting plate away from the support tube, and a top support skin is fixedly connected to the base. The other end of the connecting plate movably passes through the collar and extends into the support tube.

[0009] Furthermore, the side of the top support skin is arc-shaped, and the arc-shaped side of the top support skin is adapted to the inner diameter of the thin-walled tube.

[0010] Furthermore, a support frame is fixedly installed on the electric push rod, the support frame is connected and fixed to the fixed plate, a rotating sleeve is fixedly connected to the output end of the electric push rod, and one end of the transmission rod is rotatably connected to the rotating sleeve.

[0011] Furthermore, a positioning ring is fixedly connected to the outer wall of the end of the support tube near the electric push rod.

[0012] Furthermore, the round rod slides in contact with the inner wall of the support tube, the lifting groove includes a flat groove portion opened axially along the arc surface of the round rod, a trapezoidal protrusion is fixedly provided in the flat groove portion, and a slider is fixedly connected to the connecting plate, the slider slidingly engaging with the lifting groove.

[0013] Furthermore, the top support and the corresponding slide plate or collar are connected by an elastic element one, and one end of the transmission rod is fixedly connected to the support tube by an elastic element two.

[0014] Furthermore, a U-shaped frame is fixedly installed on the side of the fixing plate facing the main body of the laser cutting machine. The U-shaped frame is inclined and has two push rods fixedly connected in a symmetrical structure on it.

[0015] Another objective of this invention is to provide a laser cutting process for hardware accessories, which aims to solve the problem of clamping deformation during the cutting of thin-walled tubes and achieve internal flexible support and adaptive displacement.

[0016] To achieve the above objectives, the present invention provides the following technical solution: a laser cutting process for hardware accessories, comprising the following steps: S1. Place the thin-walled tube between the front and rear chuck spindle boxes. The clamping mechanism lightly clamps the outer wall of the tube. The rear chuck spindle box drives the tube to move axially to the cutting position. S2. The electric push rod extends and drives the support tube into the inside of the pipe. After the support tube stops, the round rod continues to move, and the top support expands radially in sync, abutting against the inner wall of the pipe. S3. The laser cutting head performs piercing and contour cutting on the pipe. The connecting rod and the relief groove cooperate to make the top support near the laser cutting head axially offset to avoid the laser focus. S4. After the cutting is completed, the electric push rod retracts and resets, and the cut pipe falls off. Then repeat S1-S3 until all the pipes are cut.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. When the support tube moves axially, it drives the top support components to extend into the tube. Multiple sets of top support components expand outward simultaneously, forming uniform support and limiting on the inner wall of the tube. This reduces the resistance force of the external clamping mechanism, and the clamping force only needs to meet the transmission requirements of tube feeding and rotation. Relying on the linkage between the clearance groove and the connecting rod, the mechanism can dynamically adjust the position of the top support components as the tube rotates, so that the top support components actively avoid the laser focus. This avoids interference between the components and the laser, and effectively prevents the thin-walled tube from being deformed by compression and heat, thereby effectively improving the yield of hardware parts.

[0018] 2. The U-shaped frame and the push rod work together to automatically push out the finished hardware when the support tube is reset. At the same time, the U-shaped frame interferes with the falling trajectory of the finished hardware, preventing the freshly cut end face from being deformed or damaged by impact, thus further improving the product qualification rate. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the laser cutting machine based on hardware parts processing according to the present invention; Figure 2 This is a schematic diagram of the front chuck spindle box and fixing frame structure of the laser cutting machine based on hardware parts processing according to the present invention. Figure 3 This is a schematic diagram of the support tube and top support structure of the laser cutting machine based on hardware parts processing according to the present invention; Figure 4 This is a schematic diagram of the fixing plate and support tube structure of the laser cutting machine based on hardware parts processing according to the present invention; Figure 5 This is a schematic diagram of the collar and top support structure of the laser cutting machine based on hardware parts processing according to the present invention; Figure 6 This is a schematic diagram of the internal structure of the support tube of the laser cutting machine based on the processing of hardware parts according to the present invention; Figure 7 This is a schematic diagram of the top support and round rod structure of the laser cutting machine based on hardware parts processing according to the present invention; Figure 8 This is a schematic diagram of the movable ring and connecting rod structure of the laser cutting machine based on hardware parts processing according to the present invention; Figure 9 This is a schematic diagram of the movable ring structure of the laser cutting machine based on the processing of hardware parts according to the present invention.

[0020] In the picture: 1. Laser cutting machine body; 2. Fixing frame; 3. Fixing plate; 4. Support tube; 5. Collar; 6. Slide plate; 7. Push rod; 8. Top support component; 81. Connecting plate; 82. Base; 83. Top support skin; 9. Elastic component one; 10. Support frame; 11. Electric push rod; 12. Transmission rod; 13. Rotating sleeve; 14. Positioning ring; 15. Round rod; 16. Lifting groove; 17. Slider; 18. Elastic component two; 19. Movable ring; 20. Counterweight; 21. Leaving groove; 22. Connecting rod; 23. U-shaped frame. Detailed Implementation

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] Example 1, referring to Figures 1-9This invention provides a laser cutting machine for processing hardware parts, comprising a laser cutting machine body 1 and a fixing frame 2 fixedly installed on the side wall of the front chuck spindle box of the laser cutting machine body 1. A fixing plate 3 is fixedly connected to the other end of the fixing frame 2. A support tube 4 is laterally slidably arranged on the fixing plate 3, with its axis aligned with the axis of the front chuck spindle box. Two collars 5 are axially fixedly arranged on the outer wall of the end of the support tube 4 closest to the laser cutting machine body 1. Multiple top supports 8 are slidably arranged in a ring at equal intervals on the collars 5. Multiple sliding plates 6 are axially slidably connected to the collars 5 closest to the fixing plate 3, and the sliding plates 6 slide in cooperation with the corresponding top supports 8. The fixing plate 3 is further... An electric push rod 11 is fixedly installed on one side of the laser cutting machine body 1. The output end of the electric push rod 11 is rotatably connected to a transmission rod 12. The transmission rod 12 is set inside the support tube 4, and two round rods 15 are fixedly connected to the transmission rod 12. Multiple lifting grooves 16 are opened on the round rods 15. When the round rods 15 move, the lifting grooves 16 drive the top support 8 to move radially. A movable ring 19 is rotatably connected to the outer wall of the support tube 4 near the laser cutting machine body 1. A counterweight 20 is fixedly connected below the movable ring 19. A clearance groove 21 is opened on the movable ring 19. The clearance groove 21 is composed of an arc groove and a connected trapezoidal groove. A connecting rod 22 is fixedly connected to the slide plate 6. The other end of the connecting rod 22 is slidably engaged with the clearance groove 21.

[0023] Specifically, when the front and rear chuck spindle boxes move the thin-walled tube to the cutting position, the electric push rod 11 extends and drives the support tube 4 to precisely move into the tube through the transmission rod 12, so that the gap between the two collars 5 is exactly aligned with the cutting end of the tube; when the support tube 4 reaches the maximum stroke position, the electric push rod 11 continues to extend, and the transmission rod 12 drives the round rod 15 to move axially inside the support tube 4. The lifting groove 16 on the round rod 15 synchronously drives the corresponding top support 8 to extend radially outward. Multiple top support 8 work together to apply a uniform outward abutment force to the inner wall of the tube, thereby achieving stable support and limiting of the tube. This can significantly reduce the clamping force required by the clamping mechanism on the front chuck spindle box, and fundamentally avoid the deformation problems such as out-of-roundness, indentation or collapse of the thin-walled tube due to external pressure clamping; during the radial rotation and cutting process of the tube with the spindle box... With the help of the counterweight 20 to limit the movement of the ring 19 by gravity, the trapezoidal groove in the clearance groove 21 is always kept facing upward. When the pipe drives the support pipe 4 to rotate synchronously, the connecting rod 22 at the top of the clearance groove 21 will slide along the inclined surface of the trapezoidal groove, thereby driving the connected slide plate 6 to move axially. Through the sliding cooperation between the slide plate 6 and the top support 8, the top support 8 on the corresponding side of the cutting area is driven to move radially, so as to accurately make room for the laser focus formed by the laser cutting head and completely avoid the risk of interference between the laser and the top support 8. After the cutting operation is completed, the electric push rod 11 retracts, the transmission rod 12 drives the round rod 15 to reverse and reset, the lifting groove 16 releases the lifting force on the top support 8, the top support 8 is retracted to the outer wall of the support pipe 4 and the support pipe 4 is smoothly withdrawn from the pipe with the transmission rod 12, completing a single cutting support cycle. This structure uses a built-in radial top support design to replace the traditional external clamping auxiliary support, which optimizes the stress mode of thin-walled tubes from a mechanical perspective. Combined with the adaptive avoidance mechanism of the top support component 8, it not only efficiently solves the industry pain point of thin-walled tube clamping deformation, but also completely eliminates the hidden danger of interference with the laser cutting head. Moreover, no manual intervention is required to adjust the support position throughout the process, which can perfectly adapt to the continuous production rhythm and effectively improve the finished product qualification rate and production efficiency of hardware parts processing.

[0024] Reference Figure 5 , Figure 7 The top support 8 includes a connecting plate 81, which is slidably connected to the corresponding slide plate 6 or collar 5. A base 82 is fixedly connected to one end of the connecting plate 81 away from the support tube 4. A top support skin 83 is fixedly connected to the base 82. The other end of the connecting plate 81 movably passes through the collar 5 and extends into the support tube 4.

[0025] Specifically, the connecting plate 81 and the corresponding sliding plate 6 or collar 5 form a radial sliding engagement. When the round rod 15 moves axially inside the support tube 4, the lifting groove 16 will abut against the inner end of the connecting plate 81, pushing the connecting plate 81 to move radially outward, thereby driving the base 82 fixed to the outer end of the connecting plate 81 and the top support skin 83 to extend synchronously. The top support skin 83, as a component that directly contacts the inner wall of the tube, is made of elastic anti-slip material, which can increase the contact friction with the inner wall of the tube to improve the support stability, and avoid scratching or indenting the inner wall of the tube. With the even distribution of multiple top support parts 8, uniform force support is achieved for the inner wall of the tube.

[0026] Reference Figure 7 The top support skin 83 has an arc-shaped side, and the arc-shaped side of the top support skin 83 is adapted to the inner diameter of the thin-walled pipe.

[0027] Specifically, the side of the top support skin 83 adopts an arc-shaped design that matches the inner diameter of the thin-walled pipe. When the top support 8 extends radially under the drive of the lifting groove 16, its arc-shaped side can form a complete surface contact with the inner wall of the pipe. Combined with the characteristics of the elastic anti-slip material, it can not only evenly distribute the supporting force to the contact area of ​​the inner wall of the pipe, avoiding the inner wall indentation or hidden deformation caused by local pressure concentration, but also improve the contact friction through the tightness of the arc-shaped fit, further enhancing the stability of the support limit, preventing the pipe from shaking due to gaps during processing, and improving the cutting accuracy.

[0028] It should be noted that the top support 83 and the base 82 are connected in a detachable manner (such as by snap-fit ​​or threaded locking). This design gives the equipment flexible specification adaptability. When processing thin-walled tubes with different inner diameters, the currently adapted top support 83 can be quickly removed and replaced with an arc-shaped top support 83 that precisely matches the inner diameter of the target tube. This ensures that the arc-shaped side of the top support 83 can still form complete surface contact with the inner wall of the new tube after replacement. By replacing the top support 83, it can adapt to the processing needs of thin-walled tubes with various inner diameters, significantly reducing the specification adaptation cost and adjustment time of the equipment. This effectively broadens the application scenarios of this laser cutting machine in processing thin-walled tube hardware parts of different specifications, further enhancing the practicality and market adaptability of the equipment. Reference Figure 4 , Figure 6 A support frame 10 is fixedly installed on the electric push rod 11. The fixed frame 2 is connected and fixed to the fixed plate 3. A rotating sleeve 13 is fixedly connected to the output end of the electric push rod 11. One end of the transmission rod 12 is rotatably connected to the rotating sleeve 13.

[0029] Specifically, the electric push rod 11 is securely fixed by the support frame 10, providing reliable support for its telescopic movement. One end of the transmission rod 12 forms a rotational engagement with the rotating sleeve 13, adapting to the rotation during the pipe annular cutting motion.

[0030] Reference Figure 4 A positioning ring 14 is fixedly connected to the outer wall of the end of the support tube 4 near the electric push rod 11.

[0031] Specifically, the positioning ring 14 is slidably sleeved on the outer wall of the support tube 4, and the positioning ring 14 is tightly abutted against the outer wall of the support tube 4 by a threaded bolt, so as to realize the detachable fixation of the positioning ring 14 and the support tube 4. Its core function is to accurately limit the axial movement of the support tube 4. When the support tube 4 moves into the tube under the drive of the electric push rod 11, until the positioning ring 14 forms a rigid abutment with the fixing plate 3, the support tube 4 can no longer move forward, thereby ensuring that the gap between the two collars 5 can be accurately aligned with the annular cutting area of ​​the tube. By loosening the fixing bolts, sliding and adjusting the axial position of the positioning ring 14 on the outer wall of the support pipe 4, and then re-tightening the bolts, it can flexibly adapt to thin-walled pipes of different lengths or cutting ports at different preset positions. Regardless of changes in pipe size or cutting position, it can quickly calibrate the gap between the two collars 5 and the alignment accuracy of the cutting area without the need for complex adjustments to the main body of the support mechanism. The operation is convenient and efficient, further improving the adaptability of the equipment to different processing requirements, ensuring the consistency and accuracy of the support position during the cutting process, and providing a reliable guarantee for the stability of processing quality.

[0032] Reference Figure 7 The round rod 15 slides in contact with the inner wall of the support tube 4. The lifting groove 16 includes a flat groove portion opened axially along the arc surface of the round rod 15. A trapezoidal protrusion is fixedly provided in the flat groove portion. A slider 17 is fixedly connected to the connecting plate 81. The slider 17 slides in cooperation with the lifting groove 16.

[0033] Specifically, after the support tube 4 stops moving at the limit position, the electric push rod 11 continues to extend, driving the round rod 15 to move axially inside the support tube 4. As the round rod 15 moves, the trapezoidal protrusion in the lifting groove 16 gradually abuts against the slider 17. The inclined surface of the trapezoidal protrusion guides the slider 17 to move, thereby driving the connecting plate 81 and the overall top support 8 to extend radially outward, ultimately making the top support 8 tightly abut against the inner wall of the thin-walled tube, completing the top support of the inner tube wall.

[0034] Reference Figure 6 The top support 8 and the corresponding slide plate 6 or collar 5 are connected by an elastic element 9, and one end of the transmission rod 12 is fixedly connected to the support tube 4 by an elastic element 18.

[0035] Specifically, the elastic element 9 is always in a stretched state and can continuously apply radial inward pulling force to the top support 8. When the slider 17 is not in contact with the trapezoidal protrusion, all the top support 8 will synchronously contract radially under the traction of the elastic element 9. After contraction, the overall annular outer diameter is smaller than the inner diameter of the pipe, ensuring that the support pipe 4 can smoothly enter and exit the pipe without jamming. The support tube 4 can move axially and rotate radially on the fixed plate 3. A damping structure is provided between the two. The compressive force of the elastic element 18 is greater than the damping resistance, so as to realize the sequential switching of the mechanism's actions: When the electric push rod 11 extends outward, the transmission rod 12 first overcomes the damping resistance and drives the support tube 4 to complete the axial feed first. After the support tube 4 reaches the limit position and can no longer move, the transmission rod 12 continues to advance and compress the elastic element 18, thereby driving the round rod 15 to move inside the support tube 4, completing the outward pushing action of the top support 8; Conversely, when the electric push rod 11 retracts, the elastic element 18 releases the compressive force, first pushing the round rod 15 to reset in the opposite direction, the slider 17 disengages from the trapezoidal protrusion, and the top support 8 releases its abutment support to the inner wall of the tube. After the round rod 15 is fully reset, the transmission rod 12 then drives the support tube 4 to move backward as a whole, completing the mechanism reset. This structure relies on the combination of elasticity and damping to precisely distinguish the timing of movements, ensuring a smooth and continuous motion process that effectively prevents collisions and interference between components. Example 2, refer to Figure 3 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that a U-shaped frame 23 is fixedly installed on the side of the fixing plate 3 facing the laser cutting machine body 1. The U-shaped frame 23 is inclined and has two push rods 7 fixedly connected in a symmetrical structure on the U-shaped frame 23.

[0036] Specifically, the lower end of the U-shaped frame 23 is lower than the bottom surface of the lowest support skin 83 in its fully retracted state. After the tube is laser-cut, the finished hardware is fitted onto the outside of the support 8. When the support tube 4 moves backward to reset, the end face of the finished tube near the fixed plate 3 forms a contact limit with the push rod 7. Relying on the blocking action of the push rod 7, the finished tube gradually detaches from the support 8 as the support tube 4 moves backward, achieving automatic unloading. The finished tube, detached from the support structure, continues to fall and contacts the lower end of the inclined U-shaped frame 23. Under the guidance of the frame, its posture deflects, changing its falling trajectory and landing angle. This effectively avoids the freshly cut end face being directly subjected to hard impact, preventing bumps, deformation, or burrs on the cut surface, further ensuring the appearance and processing quality of the finished hardware. The remaining structure is the same as in Example 1.

[0037] Based on embodiments 1-2, the working principle of this invention is as follows: The front and rear chuck spindle boxes transport the thin-walled tube to the cutting station. The electric push rod 11 extends and drives the support tube 4 into the tube through the transmission rod 12. The positioning ring 14 abuts against the fixing plate 3 to complete the stroke limit, so that the gap between the two collars 5 is precisely aligned with the cutting port. The electric push rod 11 continues to extend, compressing the elastic element 18 and driving the round rod 15 to move axially. The trapezoidal protrusion in the lifting groove 16 cooperates with the slider 17 to push the top support 8 to extend radially outward. The top support skin 83 fits against the inner wall of the tube to form support, effectively reducing the clamping force of the external clamping mechanism and avoiding tube deformation. During the cutting operation, the counterweight 20 restricts the posture of the movable ring 19, and the clearance groove 21 cooperates with the connecting rod 22 and the slide plate 6 to drive the top support 8 corresponding to the cutting area to retract, making room for the laser and eliminating interference problems. After the cutting is completed, the electric push rod 11 retracts, the elastic element 2 18 first drives the round rod 15 to reset, the elastic element 1 9 pulls the top support 8 to retract, and then the support tube 4 exits the tube.

[0038] Example 3, referring to Figures 1-9 The third embodiment of the present invention provides a laser cutting process for hardware accessories, comprising the following steps: S1. Place the thin-walled tube between the front and rear chuck spindle boxes. The clamping mechanism lightly clamps the outer wall of the tube. The rear chuck spindle box drives the tube to move axially to the cutting position. S2. The electric push rod 11 extends and drives the support tube 4 into the inside of the pipe. After the support tube 4 stops, the round rod 15 continues to move, and the top support 8 expands radially in sync, abutting against the inner wall of the pipe. S3. The laser cutting head performs perforation and contour cutting on the pipe. The connecting rod 22 and the relief groove 21 cooperate to make the top support 8 near the laser cutting head axially offset to avoid the laser focus. S4. After the cutting is completed, the electric push rod 11 retracts and resets, and drives the cut pipe to fall. Then repeat S1-S3 until the pipe is completely cut.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A laser cutting machine for processing hardware parts, comprising a laser cutting machine body (1), characterized in that, It also includes a fixed bracket (2) fixedly installed on the side wall of the front chuck spindle box of the laser cutting machine body (1). The other end of the fixed bracket (2) is fixedly connected to a fixed plate (3). A support tube (4) is slidably arranged through the fixed plate (3). The axis of the support tube (4) is aligned with the axis of the front chuck spindle box. Two collars (5) are axially fixed on the outer wall of the end of the support tube (4) near the laser cutting machine body (1). Multiple top support pieces (8) are slidably arranged in a ring at equal intervals on the collars (5). Multiple sliding plates (6) are axially slidably connected on the collar (5) near the fixed plate (3). The sliding plates (6) are slidably engaged with the corresponding top support pieces (8). An electric push rod (11) is fixedly installed on the side of the fixed plate (3) away from the laser cutting machine body (1). The output end of the electric push rod (11) is rotatably connected to a transmission rod (12). The transmission rod (12) is set inside the support tube (4), and two round rods (15) are fixedly connected to the transmission rod (12). Multiple lifting grooves (16) are opened on the round rods (15). When the round rods (15) move, the lifting grooves (16) drive the top support (8) to move radially. A movable ring (19) is rotatably connected to the outer wall of the support tube (4) near the laser cutting machine body (1). A counterweight (20) is fixedly connected below the movable ring (19). A clearance groove (21) is opened on the movable ring (19). The clearance groove (21) is composed of an arc groove and a connected trapezoidal groove. A connecting rod (22) is fixedly connected to the slide plate (6). The other end of the connecting rod (22) slides in cooperation with the clearance groove (21).

2. The laser cutting machine based on hardware parts processing according to claim 1, characterized in that, The top support (8) includes a connecting plate (81), which is slidably connected to the corresponding sliding plate (6) or collar (5). A base (82) is fixedly connected to one end of the connecting plate (81) away from the support tube (4). A top support skin (83) is fixedly connected to the base (82). The other end of the connecting plate (81) movably passes through the collar (5) and extends into the support tube (4).

3. The laser cutting machine based on hardware parts processing according to claim 2, characterized in that, The top support skin (83) has an arc-shaped side, and the arc-shaped side of the top support skin (83) is adapted to the inner diameter of the thin-walled pipe.

4. The laser cutting machine based on hardware parts processing according to claim 1, characterized in that, A support frame (10) is fixedly installed on the electric push rod (11). The fixed frame (2) is connected and fixed to the fixed plate (3). A rotating sleeve (13) is fixedly connected to the output end of the electric push rod (11). One end of the transmission rod (12) is rotatably connected to the rotating sleeve (13).

5. The laser cutting machine based on hardware parts processing according to claim 1, characterized in that, A positioning ring (14) is fixedly connected to the outer wall of one end of the support tube (4) near the electric push rod (11).

6. The laser cutting machine based on hardware parts processing according to claim 2, characterized in that, The round rod (15) slides in contact with the inner wall of the support tube (4). The lifting groove (16) includes a flat groove portion opened axially along the arc surface of the round rod (15). A trapezoidal protrusion is fixedly provided in the flat groove portion. A slider (17) is fixedly connected to the connecting plate (81). The slider (17) slides in cooperation with the lifting groove (16).

7. The laser cutting machine based on hardware parts processing according to claim 1, characterized in that, The top support (8) and the corresponding slide plate (6) or collar (5) are connected by an elastic element one (9), and one end of the transmission rod (12) is fixedly connected to the support tube (4) by an elastic element two (18).

8. The laser cutting machine based on hardware parts processing according to claim 1, characterized in that, A U-shaped frame (23) is fixedly installed on the side of the fixed plate (3) facing the main body (1) of the laser cutting machine. The U-shaped frame (23) is inclined and has two push rods (7) fixedly connected in a symmetrical structure on the U-shaped frame (23).

9. A laser cutting process for hardware parts, applied to the laser cutting machine for hardware parts processing as described in claim 1, characterized in that, Includes the following steps: S1. Place the thin-walled tube between the front and rear chuck spindle boxes. The clamping mechanism lightly clamps the outer wall of the tube. The rear chuck spindle box drives the tube to move axially to the cutting position. S2. The electric push rod (11) extends and drives the support tube (4) into the inside of the pipe. After the support tube (4) stops, the round rod (15) continues to move, and the top support (8) expands radially in sync and abuts against the inner wall of the pipe. S3. The laser cutting head pierces and cuts the contour of the pipe. The connecting rod (22) and the relief groove (21) work together to make the top support (8) near the laser cutting head axially offset to avoid the laser focus. S4. After the cutting is completed, the electric push rod (11) retracts and resets, and drives the cut pipe to fall. Then repeat S1-S3 until the pipe is completely cut.

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