A laser cutting machine for metal pipes

Abstract

The present application relates to laser cutting equipment technical field, specifically is a kind of metal pipe fittings laser cutting machine, including drive assembly and laser being set on it, the cutting machine also includes linkage box being slid left and right on drive assembly, linkage box is provided with support mechanism and collection mechanism on it by shaft cylinder, support mechanism is adapted to the inner wall of pipe fitting and is supported in it, collection mechanism tracks laser and collects slag, the present application uses linkage box to drive shaft cylinder to insert into the inside of pipe fitting to be cut, and by several groups of abutting assembly, it is adapted to the pipe fitting of different shapes, in the form of inner support, abutting on the inner wall of pipe fitting, so that shaft cylinder drives collection bin to always be located in the central position of pipe fitting;By moving linkage box, collection bin is always located in the cutting position of pipe fitting, and make two baffles always correspond to laser, by baffle, the slag splashed during cutting is guided to the steel wire filler in collection bin, and then capture slag, actively collected.

Description

Technical Field

[0001] This invention relates to the field of laser cutting equipment technology, specifically a laser cutting machine for metal pipes. Background Technology

[0002] Laser cutting, as a high-precision and highly flexible thermal processing method, has been widely used in the field of metal pipe processing. Compared with traditional sawing, stamping and mechanical milling processes, laser cutting has significant advantages such as high cutting accuracy, narrow kerf, small heat-affected zone and good cross-sectional quality.

[0003] When processing metal pipes, existing laser cutting machines typically use a configuration where a chuck holds the pipe and drives it to rotate, while the laser head moves or swings along the pipe's axial direction. Specifically, the equipment generally includes a bed, a front chuck and a rear chuck mounted on the bed, a three-axis linkage mechanism mounted above the chuck, and a laser head installed at the execution end of the mechanism.

[0004] The front and rear chucks can jointly clamp the pipe and drive it to rotate. The rear chuck can feed the pipe axially along the bed. The three-axis linkage mechanism has the freedom of movement in the X, Y and Z axes. The laser head follows the swing mechanism and swings within a certain angle range, thereby realizing the cutting of the pipe at different positions in the circumferential and axial directions.

[0005] When using the laser cutting machine with the above configuration to cut pipes, the pipes are first fed into the chuck by manual or automatic feeding mechanism. The front and rear chucks clamp and center synchronously. Then, the CNC system drives the chuck to rotate the pipe to the target angle, and at the same time drives the laser head to move along the pipe axis to the cutting position. The laser beam is emitted from the nozzle and acts on the pipe wall, cutting through the pipe wall with the help of auxiliary gas.

[0006] Even after the laser penetrates the upper sidewall of the pipe, it still retains high energy, which can easily cause burns, overheating, or even cut through the lower inner wall. At the same time, molten slag splashes at high speed into the inner cavity of the pipe and adheres to the inner wall. After cooling, it forms a slag that is difficult to remove. To address this, existing technologies typically use a mandrel with a slightly smaller outer diameter inserted into the pipe. The mandrel serves several purposes: blocking the laser and protecting the lower inner wall; catching the molten slag and preventing it from directly adhering to the inner wall; and providing radial support to the inner cavity of the pipe to suppress deformation.

[0007] However, the existing mandrel still has obvious shortcomings: First, the mandrel is placed in the tube by gravity alone, and its posture is uncontrollable. When cutting the lower part of the tube, the mandrel is close to the lower inner wall, and the distance between it and the cut exit is too small, blocking the slag discharge channel. The auxiliary gas and molten slag are difficult to discharge. Moreover, the mandrel itself directly affects the complete penetration of the laser into the tube, resulting in a decrease in cutting quality.

[0008] Secondly, the mandrel only passively blocks the molten slag on its surface. After high-speed impact, the molten slag is prone to rebound and adhere to the inner wall of the pipe, affecting the cutting quality. Thirdly, the mandrel has a fixed cross-sectional shape, which is difficult to adapt to the inner cavity of irregularly shaped pipes such as rectangular pipes and triangular pipes. There are dead angles at the edges and cross-sectional changes, which leads to the molten slag directly adhering to the inner wall of the pipe.

[0009] Therefore, existing laser cutting machines for metal pipes still need improvement in terms of laser penetration protection and slag collection. Summary of the Invention

[0010] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a metal pipe laser cutting machine, including a drive assembly and a laser mounted thereon. The cutting machine also includes a linkage box that is slidably mounted on the drive assembly. A support mechanism and a collection mechanism are mounted on the linkage box via a shaft. The support mechanism adapts to the inner wall of the pipe and provides internal support for it. The collection mechanism tracks the laser and collects the molten slag.

[0011] The support mechanism includes several sets of clamping components fixedly installed on the shaft cylinder. The clamping components are clamped against the inner wall of the pipe by means of internal support. By adjusting the position of each clamping component, it can adapt to pipes of different shapes.

[0012] The collection mechanism includes a shaft rotatably mounted on a cylindrical shaft, a collection chamber fixedly installed at the right end of the shaft, and two baffles slidingly mounted on the collection chamber along the radial direction of the shaft. When cutting the pipe, the end of the baffle away from the shaft axis is attached to the inner wall of the pipe.

[0013] The collection chamber is equipped with wire filler for capturing splashed molten slag.

[0014] Preferably, several sets of the clamping components are arranged at equal intervals in the left-right direction, and each set of clamping components consists of several components arranged at equal intervals along the circumference of the shaft.

[0015] Preferably, in two adjacent sets of abutting components, one set has three abutting components and the other set has four abutting components.

[0016] Preferably, the clamping assembly includes a clamping plate slidably connected to the shaft cylinder, and a roller is rotatably connected to one end of the clamping plate away from the shaft axis.

[0017] Preferably, a push-pull plate is hinged to the side of the abutment plate near the shaft axis, and a sliding block is hinged to the end of the push-pull plate near the shaft axis.

[0018] Preferably, a plurality of threaded rods are rotatably provided on the shaft, and the threaded rods are threadedly connected to the corresponding sliding blocks. A plurality of encoder motors are fixedly installed on the shaft, and the encoder motors are connected to the corresponding threaded rods through a belt drive structure.

[0019] Preferably, a roller is rotatably provided on the side of the shielding plate away from the axis of the shaft, and the area between the two shielding plates corresponds to the laser.

[0020] Preferably, two electric cylinders are fixedly installed on the collection chamber. The piston rods of the electric cylinders are fixedly connected to the corresponding baffles. The electric cylinders drive the rollers to always be in contact with the inner wall of the pipe through the baffles.

[0021] Preferably, a synchronous motor is fixedly installed inside the linkage box, and the output shaft of the synchronous motor is fixedly connected to the shaft rod.

[0022] Preferably, a plurality of grid bars are fixedly connected at equal intervals along the edge of the collection chamber and in the area between the two baffles. The grid bars are used to prevent the steel wire filler from falling out of the collection chamber.

[0023] The beneficial effects of this invention are as follows: First, this invention uses a linkage box to drive the shaft cylinder to be inserted into the pipe to be cut, and uses several sets of clamping components to adapt to pipes of different shapes, clamping it against the inner wall of the pipe in an internal support manner, so that the shaft cylinder drives the collection chamber to always be in the center position of the pipe; by moving the linkage box, the collection chamber is always in the cutting position of the pipe, and the two baffles are always directly opposite the laser. The baffles guide the molten slag splashed during cutting to the steel wire filler in the collection chamber, thereby capturing the molten slag and actively collecting it. This effectively solves the problems of existing mandrels relying solely on gravity, uncontrollable posture, easy blockage of slag discharge channels, and difficulty in adapting to irregularly shaped pipes, and improves the reliability of internal support and molten slag collection in pipes.

[0024] Second, this invention uses two electric cylinders to drive the corresponding baffle plates to slide radially, so that the rollers on the baffle plates are always in contact with the inner wall of the pipe. Thus, when the synchronous motor drives the collection bin to rotate synchronously with the laser through the shaft, the baffle plates can adapt to different pipe shapes to effectively guide the molten slag, avoiding dead angles at the corners and cross-sectional changes of irregularly shaped pipes such as rectangular pipes and triangular pipes, thereby ensuring the molten slag collection effect.

[0025] Third, this invention uses steel wire filler to capture molten slag through its own gaps, allowing molten slag splashed onto the steel wire filler to pass through the gaps and move into the collection chamber. Molten slag impacting the steel wire filler is also prevented from rebounding due to the deformation and buffering effect of the steel wire filler. At the same time, several grid rods are fixedly connected at equal intervals along the edge of the collection chamber and in the area between the two baffles. The grid rods are used to prevent the steel wire filler from falling out of the collection chamber, thereby achieving active collection of molten slag and preventing molten slag from rebounding and adhering to the inner wall of the pipe. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a partial sectional view of the shaft cylinder, synchronous motor, linkage box and shaft in this invention;

[0029] Figure 3 This is a schematic diagram of the structure of the collection bin, rollers, clamping plate and baffle plate in this invention;

[0030] Figure 4 This is a partial cross-sectional view of the shaft cylinder, the clamping plate, the sliding block, and the push-pull plate in this invention;

[0031] Figure 5 This is a side view of the rollers fitting against the inner wall of the triangular tube in this invention;

[0032] Figure 6 This is a partial structural diagram of the shaft cylinder, threaded rod, and encoder motor in this invention;

[0033] Figure 7 This is a partial cross-sectional view of the shaft, collection bin, grid bar, and baffle plate in this invention.

[0034] In the diagram: 1. Drive assembly; 2. Laser; 3. Linkage box; 4. Shaft cylinder; 5. Support mechanism; 6. Collection mechanism; 41. Push-pull plate; 42. Sliding block; 43. Threaded rod; 44. Encoding motor; 51. Clamping assembly; 61. Shaft; 62. Collection bin; 63. Baffle plate; 64. Synchronous motor; 511. Clamping plate; 512. Roller; 621. Electric cylinder; 622. Grille bar; 631. Drum. Detailed Implementation

[0035] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0036] See Figure 1 , Figure 2 and Figure 3 A metal pipe laser cutting machine includes a drive assembly 1 and a laser 2 mounted thereon. The cutting machine also includes a linkage box 3 that is slidably mounted on the drive assembly 1. A support mechanism 5 and a collection mechanism 6 are mounted on the linkage box 3 via a shaft cylinder 4. The support mechanism 5 adapts to the inner wall of the pipe and provides internal support for it. The collection mechanism 6 tracks the laser 2 and collects the molten slag.

[0037] In this embodiment, the drive assembly 1 adopts the conventional configuration of existing laser cutting machines, such as including a bed, a chuck is provided on the bed via the spindle box, and a three-axis linkage mechanism for driving the laser 2 is provided on the spindle box. During cutting, the chuck clamps the tube and feeds it in a straight line along the bed to realize the axial feeding of the tube; the three-axis linkage mechanism has motion degrees of freedom in the X, Y and Z axis directions, and can drive the laser 2 to rotate and cut around tubes of different shapes and diameters.

[0038] During cutting, the linkage box 3 drives the shaft cylinder 4 into the clamped and positioned tube to be cut. At the same time, the shaft cylinder 4 drives the support mechanism 5 and the collecting mechanism 6 to move into the inner cavity of the tube. After the support mechanism 5 enters the tube with the shaft cylinder 4, it adapts to the inner wall of the tube and abuts against the inner wall of the tube through internal support, so that the shaft cylinder 4 and the collecting mechanism 6 remain stable inside the tube. The collecting mechanism 6 corresponds to the position of the laser 2.

[0039] Subsequently, laser 2 cuts the pipe fitting, and linkage box 3 moves left and right according to the cutting position, so that collection mechanism 6 tracks laser 2 and is located in the corresponding cutting area inside the pipe fitting, collecting the molten slag generated during the cutting process, reducing the molten slag splashing and adhering to the inner wall of the pipe fitting, thereby protecting the inner wall of the pipe fitting and improving the cutting quality. After the cutting is completed, support mechanism 5 releases the clamping on the inner wall of the pipe fitting, and linkage box 3 drives shaft cylinder 4 to exit the pipe fitting.

[0040] It should be noted that a lead screw is rotatably mounted on the drive assembly 1, and the lead screw is threadedly connected to the linkage box 3. A drive motor is fixedly mounted on the drive assembly 1, and the output shaft of the drive motor is fixedly connected to the lead screw. By starting the drive motor, the output shaft of the drive motor is rotated in both directions, thereby driving the linkage box 3 to move left and right through the lead screw.

[0041] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The support mechanism 5 includes several sets of clamping components 51 fixedly installed on the shaft cylinder 4. The clamping components 51 are clamped against the inner wall of the pipe fitting by means of internal support. By adjusting the position of each clamping component 51, it can adapt to pipe fittings of different shapes. The several sets of clamping components 51 are arranged at equal intervals in the left and right directions. Each set of clamping components 51 consists of several units arranged at equal intervals along the circumference of the shaft rod 61. In two adjacent sets of clamping components 51, one set has three clamping components 51 and the other set has four clamping components 51.

[0042] When providing internal support for the pipe fitting, several clamping components 51 form multiple support positions on the pipe fitting. According to the cross-sectional shape of the inner cavity of the pipe fitting, the position of each clamping component 51 is adjusted so that each clamping component 51 extends or retracts radially along the shaft cylinder 4 until it is pressed against the inner wall of the pipe fitting. This allows it to adapt to pipe fittings of different shapes such as rectangular pipes and triangular pipes, and keeps the shaft cylinder 4 in the center position inside the pipe fitting.

[0043] Taking a rectangular tube as an example, after the shaft cylinder 4 is inserted into the rectangular tube, a set of four clamping components 51 correspond to the four inner sides of the rectangular tube respectively. By adjusting the positions of the four clamping components 51 in the set in pairs, the four clamping components 51 are clamped against the inner wall of the rectangular tube respectively; the set of three clamping components 51 retracts and does not contact the inner wall of the tube.

[0044] Taking a triangular tube as an example, when the shaft cylinder 4 is inserted into the triangular tube, a set of three clamping components 51 correspond to the three inner sides of the triangular tube respectively. By adjusting the position of the three clamping components 51 in the set, the three clamping components 51 are clamped against the inner wall of the triangular tube respectively; a set of four clamping components 51 retracts and does not contact the inner wall of the tube, thereby forming a reliable internal support for the tube.

[0045] See Figure 1 , Figure 2 , Figure 3 and Figure 7 The collecting mechanism 6 includes a shaft 61 rotatably mounted on the shaft cylinder 4. A collecting chamber 62 is fixedly installed on the right end of the shaft 61. Two baffles 63 are slidably arranged on the collecting chamber 62 along the radial direction of the shaft 61. When cutting the pipe, the end of the baffle 63 away from the axis of the shaft 61 is attached to the inner wall of the pipe. The collecting chamber 62 is filled with wire filler for capturing splashed molten slag.

[0046] When cutting the pipe fitting, the shaft 4 drives the collection chamber 62 to correspond to the cutting position through the shaft 61, and the shaft 61 drives the collection chamber 62 to rotate synchronously, so that the collection chamber 62 tracks the rotation of the laser 2. The two baffles 63 on the collection chamber 62 extend outward and fit against the inner wall of the pipe fitting. An opening area is formed between the two baffles 63 that is directly opposite the laser 2. When the molten slag generated by the laser 2 cutting through the pipe wall splashes into the inner cavity of the pipe fitting, it is first blocked and guided by the two baffles 63, so that the molten slag gathers in the collection chamber 62 along the baffles 63, avoiding the molten slag from directly rebounding to the inner wall of the pipe fitting.

[0047] After the molten slag enters the collection chamber 62, it comes into contact with the wire mesh filling material inside. Due to the irregular gaps in the wire mesh filling material, the high-speed splashing molten slag can penetrate into the interior of the wire mesh filling material and consume kinetic energy during the collision with the wire. Some of the molten slag adheres to and sticks to the surface of the wire and cools and solidifies, while some of the molten slag continues to pass through the gaps and enter the depth of the collection chamber 62, where it is blocked by the subsequent wire. The wire mesh filling material deforms and buffers when the molten slag is impacted, which can prevent the molten slag from rebounding due to the impact, thereby stably collecting the molten slag in the collection chamber 62 and reducing slag buildup on the inner wall of the pipe fitting.

[0048] It should be noted that the steel wire filler is not shown in the attached figure. The steel wire filler is a loose, irregularly spaced ball of steel wire. The steel wire filler can be formed by multiple thin steel wires twisted together randomly. It is filled in the area between the two baffles 63 in the collection chamber 62 so that the molten slag can penetrate into it and be adhered to, buffered and captured by the surface of the steel wire.

[0049] To adapt to the internal support of pipe fittings with different shapes and diameters, the present invention designs the following structure: (See reference) Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The clamping assembly 51 includes a clamping plate 511 slidably connected to the shaft cylinder 4. A roller 512 is rotatably connected to one end of the clamping plate 511 away from the axis of the shaft rod 61. A push-pull plate 41 is hinged to one side of the clamping plate 511 near the axis of the shaft rod 61. A sliding block 42 is hinged to one end of the push-pull plate 41 near the axis of the shaft rod 61. Several threaded rods 43 are rotatably provided on the shaft cylinder 4. The threaded rods 43 are threadedly connected to the corresponding sliding blocks 42. Several encoder motors 44 are fixedly installed on the shaft cylinder 4. The encoder motors 44 are connected to the corresponding threaded rods 43 through a belt drive structure.

[0050] In this embodiment, the belt drive structure includes a driven pulley fixedly installed on the outside of the threaded rod 43, a driving pulley fixedly installed on the output shaft of the encoder motor 44, and a synchronous belt wound between the driving pulley and the corresponding driven pulley.

[0051] When internal support pipe is needed, the encoder motor 44 is started. The output shaft of the encoder motor 44 drives the corresponding threaded rod 43 to rotate on the shaft cylinder 4. The threaded rod 43 drives the push-pull plate 41, which is hinged to it, to move through the transverse sliding block 42. This causes the push-pull plate 41 to push the corresponding abutment plate 511 to slide outward along the radial direction of the shaft cylinder 4, so that the abutment plate 511 drives the roller 512 on it to abut against the inner wall of the pipe.

[0052] By controlling the start of each encoder motor 44 by the host computer, the encoder motor 44 controls the rotation angle of its output shaft, which can precisely control the moving distance of the sliding block 42, and thus control the radial extension of the clamping plate 511 and the roller 512. This allows the roller 512 to adapt to the inner wall of pipes with different diameters and shapes. The roller 512 rolls in contact with the inner wall of the pipe, which can reduce the frictional resistance during the clamping process and facilitate the relative movement or position adjustment of the pipe.

[0053] In order to allow most of the splashed slag to move into the collection chamber 62, the present invention is designed with the following structure: See Figure 1 , Figure 2 , Figure 3 and Figure 7 A roller 631 is rotatably mounted on the side of the shielding plate 63 away from the axis of the shaft 61. The area between the two shielding plates 63 corresponds to the laser 2. A synchronous motor 64 is fixedly installed inside the linkage box 3. The output shaft of the synchronous motor 64 is fixedly connected to the shaft 61.

[0054] When cutting the pipe fitting, the baffle plate 63 is moved so that the baffle plate 63 drives the roller 631 on it to always be in contact with the inner wall of the pipe fitting. The laser 2 cuts the pipe wall along the circumference of the pipe fitting. The cutting position changes continuously in the circumference of the pipe fitting. The synchronous motor 64 starts and drives the collection chamber 62 to rotate synchronously through the shaft 61. The collection chamber 62 drives the two baffle plates 63 to rotate together around the axis of the shaft 61. The roller 631 rolls in contact with the inner wall of the pipe fitting, so that the area between the two baffle plates 63 always corresponds to the laser 2.

[0055] The roller 631 rolls along the inner wall of the pipe, reducing the frictional resistance between the baffle plate 63 and the inner wall of the pipe, so that the two baffle plates 63 can smoothly follow the laser 2 to rotate synchronously. The molten slag splashed after the laser 2 cuts through the pipe wall can directly enter the area between the two baffle plates 63 and be guided into the collection chamber 62, where it is captured by the steel wire filler. This prevents the molten slag from splashing to other parts of the inner wall of the pipe, improves the molten slag collection effect, and protects the inner wall of the pipe.

[0056] To ensure that the roller 631 always rolls in close contact with the inner wall of the pipe, the present invention designs the following structure: (See reference) Figure 7 Two electric cylinders 621 are fixedly installed on the collection chamber 62. The piston rod of the electric cylinder 621 is fixedly connected to the corresponding baffle plate 63. The electric cylinder 621 drives the roller 631 to always be in contact with the inner wall of the pipe through the baffle plate 63.

[0057] In this invention, a force sensor is provided at the end of the piston rod of the electric cylinder 621. The force sensor is used to detect the force between the end of the piston rod of the electric cylinder 621 and the corresponding baffle plate 63. The force can reflect the contact pressure between the roller 631 and the inner wall of the pipe.

[0058] During the cutting process, when the shape or diameter of the inner wall of the pipe changes, the pressure between the roller 631 and the inner wall of the pipe changes accordingly. The force sensor collects the pressure signal in real time and feeds it back to the controller. If the pressure detected by the force sensor is less than the preset lower limit, it means that the roller 631 is not in contact with the inner wall of the pipe or the inner diameter of the pipe has increased. The controller controls the piston rod of the electric cylinder 621 to extend, pushing the baffle plate 63 and the roller 631 to move outward until the roller 631 re-fits the inner wall of the pipe.

[0059] If the detected pressure is greater than the preset upper limit, it indicates that the roller 631 is over-pressed or the inner diameter of the pipe is too small. The controller controls the piston rod of the electric cylinder 621 to retract, so that the baffle plate 63 and the roller 631 retract appropriately to avoid deformation of the pipe or jamming of the roller 631. This allows the collection chamber 62 to adapt to the changes in the inner wall of different pipe diameters and different shapes of pipes such as rectangular and triangular pipes, ensuring the slag collection effect.

[0060] To prevent the wire mesh filling inside the collection chamber 62 from falling out when it rotates, the present invention designs the following structure: (See attached text) Figure 7 A number of grid bars 622 are fixedly connected at equal intervals along the edge of the collection chamber 62 and in the area between the two baffles 63. The grid bars 622 are used to prevent the steel wire filler from falling out of the collection chamber 62.

[0061] The loose, lumpy steel wire filler is compressed to reduce its volume and then inserted into the collection chamber 62 through the gap between adjacent grid bars 622. After being released, the steel wire filler returns to its fluffy state in the collection chamber 62 and is located between the two baffles 63. At this time, the grid bars 622, which are arranged at equal intervals, form a barrier at the entrance of the steel wire filler to prevent the steel wire filler from falling out when the collection chamber 62 rotates with the shaft 61.

[0062] Although the present invention adds structures such as a collection chamber 62, a clamping plate 511, a baffle plate 63 and a roller 631 to the traditional laser cutting machine, which slightly increases the initial manufacturing and assembly costs of the equipment, the adaptive internal support can keep workpieces with different cross-sectional shapes and pipe diameters stable, centered and suppress deformation during the cutting process, thereby improving cutting accuracy and consistency.

[0063] By actively collecting and shielding the molten slag that moves and rotates synchronously with the cutting position, high-speed splashing slag can be guided and buffered to prevent it from rebounding and adhering to the inner wall of the workpiece, thus reducing subsequent cleaning, rework, and scrap. Through rolling contact and pressure feedback adjustment, it can adapt to changes in irregularly shaped cavities such as rectangles and triangles, reducing jamming and wear, and ensuring continuous and stable production. As a result, the increased initial investment can be quickly recovered by improving the yield, reducing cleaning and maintenance costs, and expanding the scope of application of the equipment, achieving good economic benefits and possessing high practical and promotional value.

[0064] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0065] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0067] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A laser cutting machine for metal pipe fittings, comprising a drive assembly and a laser mounted thereon, characterized in that, The cutting machine also includes a linkage box that slides left and right on the drive assembly. The linkage box is equipped with a support mechanism and a collection mechanism via a shaft. The support mechanism adapts to the inner wall of the pipe and provides internal support, while the collection mechanism tracks the laser and collects the molten slag. The support mechanism includes several sets of clamping components fixedly installed on the shaft cylinder. The clamping components are clamped against the inner wall of the pipe fitting by means of internal support. By adjusting the position of each clamping component, it can adapt to pipe fittings of different shapes. The collection mechanism includes a shaft rotatably mounted on a cylinder, a collection chamber fixedly installed at the right end of the shaft, and two baffles slidingly mounted on the collection chamber along the radial direction of the shaft. When cutting the pipe, the end of the baffle away from the shaft axis is attached to the inner wall of the pipe. The collection chamber is equipped with wire filler for capturing splashed molten slag.

2. The laser cutting machine for metal pipes according to claim 1, characterized in that, Several sets of the aforementioned clamping components are arranged at equal intervals along the left-right direction, and each set of clamping components consists of several components arranged at equal intervals along the circumference of the shaft.

3. A laser cutting machine for metal pipes according to claim 1, characterized in that, In two adjacent sets of clamping components, one set has three clamping components and the other set has four clamping components.

4. A laser cutting machine for metal pipes according to claim 1, characterized in that, The clamping assembly includes a clamping plate slidably connected to the shaft cylinder, and a roller is rotatably connected to one end of the clamping plate away from the shaft axis.

5. A laser cutting machine for metal pipe fittings according to claim 4, characterized in that, A push-pull plate is hinged to the side of the abutment plate near the shaft axis, and a sliding block is hinged to the end of the push-pull plate near the shaft axis.

6. A laser cutting machine for metal pipe fittings according to claim 5, characterized in that, Several threaded rods are rotatably mounted on the shaft, and the threaded rods are threadedly connected to the corresponding sliding blocks. Several encoder motors are fixedly mounted on the shaft, and the encoder motors are connected to the corresponding threaded rods through a belt drive structure.

7. A laser cutting machine for metal pipes according to claim 1, characterized in that, A roller is rotatably mounted on the side of the shielding plate away from the axis of the shaft, and the area between the two shielding plates corresponds to the laser.

8. A laser cutting machine for metal pipe fittings according to claim 7, characterized in that, Two electric cylinders are fixedly installed on the collection chamber. The piston rods of the electric cylinders are fixedly connected to the corresponding baffles. The electric cylinders drive the rollers to always be in contact with the inner wall of the pipe through the baffles.

9. A laser cutting machine for metal pipe fittings according to claim 1, characterized in that, A synchronous motor is fixedly installed inside the linkage box, and the output shaft of the synchronous motor is fixedly connected to the shaft.

10. A laser cutting machine for metal pipes according to claim 1, characterized in that, Several grid bars are fixedly connected at equal intervals along the edge of the collection chamber and in the area between the two baffles. The grid bars are used to prevent the steel wire filler from falling out of the collection chamber.

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