Ultrathin-wall pump body machining equipment

Abstract

The invention discloses machining equipment for an ultra-thin wall pump body, and belongs to the technical field of laser cutting. The equipment comprises a laser cutting mechanism, a supporting assembly, a rotating mechanism, an inner supporting assembly and a slag discharging and separating assembly. The supporting assembly is provided with two sets of symmetrical driving units. The rotating mechanism is used for driving the pressure-bearing barrel to rotate; the inner supporting assembly comprises inner supporting blocks capable of being opened and closed in the radial direction and center shafts movably penetrating through the inner supporting blocks, and the ends of the two center shafts are in butt joint in the cutting area to be spliced into a V-shaped sinking groove to bear slag. When the driving unit drives the inner supporting assembly to retreat towards the outer side, a limiting structure of the slag discharging and separating assembly forces the center shaft to stop, the generated relative displacement difference is used for driving the inner supporting block to contract in the radial direction for discharging, and slag leakage and pipe opening cleaning are executed synchronously through the relative stretching-out action of the center shaft. Active uniform supporting and automatic deslagging and unloading of the ultrathin-wall pipe are achieved through mechanical linkage, and the problems that the thin-wall pipe is prone to deformation and slag retention during machining are solved.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, and in particular to a machining equipment for ultra-thin-walled pump bodies. Background Technology

[0002] In the mass production of vertical multistage pumps, the stainless steel cylinder, as a core pressure-bearing component, is designed with extremely thin walls to achieve ultimate lightweighting and reduce manufacturing costs. This ultra-thin wall design results in extremely poor radial compressive rigidity of the cylinder itself. Currently, existing pipe machining equipment generally relies on traditional clamping and support processes when performing high-energy laser length cutting on such ultra-thin-walled pump bodies. The most common method is to directly apply radial clamping force to the cylinder using the external chuck of the machine tool for fixation, or to prevent the outer layer from collapsing, insert a solid rigid mandrel inside the cylinder as a passive support, and then drive the cylinder to rotate synchronously to complete a full circumference of laser cutting. Simultaneously, during the cutting process, the laser head nozzle continuously sprays high-pressure auxiliary gas downwards along with the laser beam to blow away molten metal.

[0003] However, this processing method, which relies on traditional solid fixed mandrels, has drawbacks in practical applications. Because the outer diameter of the solid mandrel is fixed and there is an assembly gap between it and the inner wall of the tube, it can only provide passive rigid restraint and is difficult to apply active and uniform radial support to the extremely thin tube wall. This makes the tube body prone to shrinkage and deformation when clamped and cut under force, making it difficult to ensure the roundness of the cut. At the same time, when the high-energy laser cuts through the ultra-thin tube wall instantly, the high-temperature laser beam and liquid metal slag will fall directly onto the mandrel surface, causing local thermal damage to the mandrel. The high-temperature slag trapped in the narrow gap is difficult to clean and can easily cause material ejection interference, affecting the continuous automated operation of machining.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0005] This invention provides a machining equipment for ultra-thin-walled pump bodies to solve the technical problems of existing solid fixed mandrels in laser cutting ultra-thin tubes, which are prone to shrinkage and deformation due to lack of active radial support, and the lack of a slag discharge structure that causes molten slag to accumulate and easily cause material ejection interference, thus affecting continuous automated operation.

[0006] This invention employs the following technical solution: a machining equipment for ultra-thin-walled pump bodies, including a laser cutting mechanism; The support assembly, located at the bottom of the laser cutting mechanism, has a support bed and two sets of drive units symmetrically arranged on it. The drive units are used to provide support and linear drive force for retraction to both sides. Two rotating mechanisms are symmetrically provided and fixed to both ends of the support bed, respectively, for centering, clamping and driving the pressure cylinder to rotate; Two internal support components are symmetrically arranged and are respectively located between the corresponding rotating mechanism and the pressure-bearing cylinder. Each component includes a radially openable internal support block and a movable through-center shaft. The ends of the center shafts of the two internal support components are joined together in the cutting area to form a V-shaped sinking trough for receiving molten slag. Two slag discharge separation components are symmetrically arranged, each passing through a corresponding rotating mechanism and connected to the central shaft. Both have a limiting structure that restricts the axial retraction of the central shaft. When the drive units on both sides drive the corresponding inner support components to retreat outward, the limiting structure forces the central shaft to stop. Utilizing the resulting relative displacement difference, the inner support block is driven to radially contract and unload material, and simultaneously, the relative extension of the central shaft performs the actions of cleaning leaked slag and pipe opening.

[0007] Furthermore, each of the inner support components also includes a main fixed platform, several sliding guide rails, and several guide blocks. One end of the central shaft movably passes through the main fixed platform and engages with it via a keyway. Several sliding guide rails are arranged circumferentially along the end face of the main fixed platform. One end of the inner support block is correspondingly slidably mounted on the sliding guide rail. Several guide blocks are arranged along the straight direction of the central shaft, and several guide blocks arranged in a straight line are defined as a group. Three groups are arranged circumferentially to correspond to the inner support blocks respectively. Several inner support blocks are arranged circumferentially along the central shaft. Opening and closing grooves are provided on both sides of the guide blocks. The relative displacement between the main fixed platform and the central shaft is used to convert the trajectory change of the opening and closing grooves into radial pushing and pulling of the inner support blocks along the sliding guide rails.

[0008] Furthermore, the opening and closing slide groove consists of a horizontal slide groove and a downward inclined slide groove. The inner support assembly also includes several concave slide rail blocks distributed in a straight line along the inner bottom surface of the inner support block. The concave slide rail blocks are correspondingly arranged with the guide block. The inner wall surface of the vertical end of the concave slide rail block has a ball. The ball is slidably arranged in the opening and closing slide groove. During the material unloading and separation stroke, the ball smoothly transitions from the horizontal slide groove and slides into the inclined slide groove, guiding the inner support block to generate radial contraction inward to detach from the inner wall of the pressure cylinder.

[0009] Furthermore, a tapered end extends movably into one end of the central shaft via a horizontal shaft. The tapered end is made of copper. The tapered ends of the two inner support components are initially joined to form a V-shaped recessed groove aligned with the laser cutting area. The inner support component also includes an annular brush fixedly sleeved on the horizontal shaft. The annular brush is located between the front side of one end of the inner support block and the rear side of the tapered end. In the initial state, there is a clearance between the annular brush and the tapered end. This clearance is used to separate the joined tapered ends when the central shaft extends forward relative to the tube body, allowing the molten slag that has lost its coating to fall off. The annular brush also pushes forward with the movement to clean the inner wall of the pressure-bearing cylinder end.

[0010] Furthermore, each of the slag separation components includes a movable sleeve and a fixed sleeve. The limiting structure is an inverted L-shaped rod. The rotating mechanism has a through hole on the same horizontal line inside. One end of the movable sleeve is connected to one end of the central shaft, and the other end passes horizontally through the through hole. The fixed sleeve is horizontally fixed inside the through hole. The movable sleeve moves through the fixed sleeve and engages with the keyway. The horizontal end of the inverted L-shaped rod is fixed to the outer side of the rotating mechanism. During the overall retraction stroke, its vertical end touches and blocks the end of the movable sleeve to achieve a stop and limit on the central shaft.

[0011] Furthermore, the slag separation assembly also includes a return spring sleeved on the movable sleeve rod. One end of the return spring is connected to one end of the inner wall of the fixed sleeve, and the other end is connected to the side of the protruding edge integrally provided on the movable sleeve rod. Electromagnets are embedded in the end face of the rotating mechanism and the corresponding near end face of the main fixed platform. A control switch is provided on the main fixed platform to control the electromagnet to be energized. When the equipment is reset and closed and the electromagnet is de-energized, the elastic force released by the return spring drives the movable sleeve rod and the central shaft to reset and move, so as to guide the inner support block to perform in-situ radial expansion relative to the pressure-bearing cylinder by utilizing the trajectory of the opening and closing slide.

[0012] Furthermore, the two sets of drive units of the support assembly are symmetrically arranged along the longitudinal direction of the support bed. Each set of drive units includes a ball screw, a drive motor, a sliding block, a support base plate, and two guide rods. The support base plate is horizontally fixed inside the support bed near the center. The ball screw is horizontally arranged, with its two ends rotatably mounted between the inner wall of the end of the support bed and the support base plate via bearing seats. The drive motor is embedded and fixed at the end of the support bed, and its output end is coaxially connected to the ball screw. The two guide rods are parallel and symmetrically distributed on both sides of the ball screw, with their two ends fixed between the inner wall of the support bed and the support base plate. The center thread of the sliding block is threaded onto the ball screw, and its two sides slide through the corresponding guide rods. A trigger bending rod is fixed on the upper side of the sliding block. When the drive motor drives the sliding block to move linearly along the guide rod, the upward-extending end of the trigger bending rod abuts against and pushes the main fixed platform of the inner support assembly to perform a synchronous material retraction displacement to both sides.

[0013] Furthermore, each set of driving units is provided with at least two support units spaced apart. The two support units are arranged side by side on the side of the corresponding sliding block. Each support unit includes a support base, a support column, a V-shaped support member, and several support balls. The support base on one side is fixed to the trigger bending rod by a connecting rod. The support bases of the two side-by-side support units are connected to each other by a transverse connecting rod. The V-shaped support member is vertically supported on the support base by the support column. Several support balls are equidistantly embedded along the upper V-shaped surface of the V-shaped support member for placing the pressure cylinder. The rolling contact reduces the frictional resistance when the pressure cylinder rotates, and synchronously supports the bottom of the cut and separated cylinder as the sliding block moves linearly, so as to prevent the ultra-thin wall tube from undergoing radial bending deformation due to loss of internal support.

[0014] Furthermore, each of the rotating mechanisms includes a T-shaped frame, a chuck base, a three-jaw chuck, a driven pulley, a motor mounting base, a rotary motor, and a belt body. The T-shaped frame is fixed at the end of the support bed, the chuck base is fixed to the side of the T-shaped frame, the three-jaw chuck bearing is rotatably mounted on the side of the chuck base, the driven pulley is fixedly sleeved on the protruding end of the three-jaw chuck that protrudes from the through hole of the chuck base, the rotary motor is fixed to the chuck base via the motor mounting base, and the output end of the rotary motor has a drive pulley. The drive pulley is connected to the driven pulley via the belt body to drive the three-jaw chuck to rotate. A slag collection box is also fixed to the side of the sliding block of a set of drive units to collect waste slag that leaks from the V-shaped sinkhole.

[0015] Furthermore, linear guide rails are fixed on both sides of the upper surface of the support bed, and a transmission rack is provided on one side of one set of linear guide rails. The laser cutting mechanism includes a cabinet shell, a linear motion module, and a laser cutting head. The cabinet shell is slidably mounted on two linear guide rails, and a drive gear that meshes with the transmission rack is fixed on the bottom frame via a drive component. The linear motion module is horizontally fixed inside the cabinet shell, and a vertical cylinder is provided at its sliding end. The laser cutting head is located at the extension end of the cylinder and is used to adjust the horizontal addressing position and vertical focusing height of the laser cutting head.

[0016] The above-mentioned at least one technical solution adopted in this invention can achieve the following beneficial effects: A machining equipment for ultra-thin-walled pump bodies utilizes symmetrically arranged inner support components with radial opening and closing functions on the support bed. These inner support blocks provide active and uniform radial support to the inner wall of the ultra-thin-walled pressure cylinder, effectively solving problems such as pipe wall shrinkage, deformation, and insufficient cutting roundness caused by gaps and passive limiting in traditional solid fixed mandrels. This improves the machining accuracy of thin-walled parts. The V-shaped recessed groove formed by the initial docking of the two central shaft ends, aligned with the laser cutting area, effectively receives and isolates high-temperature molten slag, protecting the mechanism from laser thermal damage and solving the cleaning problem caused by liquid metal adhesion. More importantly, through the mechanical linkage between the limiting structure of the slag discharge separation component and the retraction stroke of the drive unit, the generated relative displacement difference automatically triggers the radial contraction of the inner support blocks to achieve unloading without an additional power source. Simultaneously, the relative extension of the central shaft completes slag leakage and pipe opening cleaning, eliminating material unloading interference caused by molten slag retention and improving the continuity and automation level of ultra-thin-walled pump body machining. Attached Figure Description

[0017] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0018] See the attached diagram.

[0019] Figure 1 This is an overall schematic diagram of a machining equipment for an ultra-thin-walled pump body according to this application.

[0020] Figure 2 for Figure 1 A magnified structural diagram at point A.

[0021] Figure 3 for Figure 1 A schematic diagram of the bottom structure.

[0022] Figure 4 for Figure 3 A magnified structural diagram at point B.

[0023] Figure 5 for Figure 1 A schematic diagram of the welding assembly structure.

[0024] Figure 6 for Figure 5 A partial structural diagram.

[0025] Figure 7 for Figure 6 A magnified structural diagram at point C.

[0026] Figure 8 for Figure 5 A schematic diagram of the planar structure.

[0027] Figure 9 for Figure 8 A magnified structural diagram at point C.

[0028] Figure 10 for Figure 8 Schematic diagram of the inner support component.

[0029] Figure label: 1. Laser cutting mechanism; 11. Cabinet shell; 12. Linear movement module; 13. Laser cutting head; 2. Support assembly; 21. Support bed; 22. Linear guide rail; 23. Transmission rack; 24. Ball screw; 25. Drive motor; 26. Sliding block; 27. Support base plate; 28. Support base frame; 29. ​​V-shaped support; 210. Support ball; 211. Guide rod; 212. Trigger bending rod; 3. Rotation mechanism; 31. T-shaped frame; 32. Chuck base; 33. Three-jaw chuck 34. Driven pulley; 35. Motor mounting base; 36. Rotary motor; 37. Belt body; 38. Welding slag collection box; 4. Internal support assembly; 41. Main fixed platform; 42. Control switch; 43. Sliding guide rail; 44. Internal support block; 441. Concave slide rail block; 45. Guide block; 451. Opening and closing slide groove; 46. Conical end; 47. Annular brush; 48. Central shaft; 5. Slag discharge separation assembly; 51. Movable sleeve; 52. Fixed sleeve; 53. Return spring; 54. Inverted L-shaped rod. Detailed Implementation

[0030] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0031] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Reference Figures 1-10As shown, the present invention provides an ultra-thin wall pump body machining equipment, which is applied to the laser cutting of the ultra-thin wall pressure-bearing cylinder of the pump body. It mainly relies on mechanical limit and differential speed linkage to realize automated slag discharge and unloading and non-destructive support.

[0033] Specifically, the ultra-thin wall pump body machining equipment mainly includes a laser cutting mechanism 1, a support component 2, a rotating mechanism 3, an inner support component 4, and a slag discharge and separation component 5. The laser cutting mechanism 1 is mounted on the support component 2. The support component 2 has a bottom support bed 21. Two drive units and corresponding support units are symmetrically arranged longitudinally on the support bed 21. The drive units provide the bottom support and linear driving force for the whole machine to move backward to both sides.

[0034] The support assembly 2 includes a bottom support bed 21, on which two linear guide rails 22 are symmetrically fixed on both sides of the upper surface. The linear guide rails 22 extend along the length of the support bed 21 and provide a guiding reference for the axial movement of the laser cutting mechanism 1. A transmission rack 23 is fixed parallel to one side edge of the linear guide rail 22.

[0035] The laser cutting mechanism 1 includes a cabinet shell 11, which is slidably mounted on two linear guide rails 22 to form a bridge structure spanning the support bed 21. A drive gear (not shown in the figure) is fixed on the bottom frame of the cabinet shell 11 by a drive component. The drive gear meshes with a transmission rack 23 and drives the drive gear to rotate through the drive component. The cabinet shell 11 can move quickly along the linear guide rails 22 to adjust the axial position of the laser cutting head 13 in the pressure cylinder.

[0036] A linear motion module 12 is horizontally fixed inside the cabinet shell 11. A vertically positioned cylinder is installed at the sliding end of the linear motion module 12, and the laser cutting head 13 is fixed to the telescopic end of the cylinder. By relying on the horizontal fine-tuning of the linear motion module 12 and the vertical telescopic movement of the cylinder, the laser cutting head 13 can precisely adjust its horizontal focusing position and vertical focusing height to adapt to pressure-bearing cylinders of different specifications.

[0037] Each drive unit includes a ball screw 24, a drive motor 25, a sliding block 26, a support base plate 27, and two guide rods 211. The support base plate 27 is horizontally fixed inside the support bed 21 near the center. The ball screw 24 is horizontally arranged, with its two ends rotatably mounted between the inner wall of the end of the support bed 21 and the support base plate 27 via bearing seats. The drive motor 25 is embedded and fixed at the end of the support bed 21, and its output end is coaxially connected to the ball screw 24. The two guide rods 211 are parallel and symmetrically distributed on both sides of the ball screw 24, with their two ends fixed between the inner wall of the support bed 21 and the support base plate 27, respectively. The sliding block 26 is threaded onto the ball screw 24 at its center, and its two sides slide along the corresponding guide rods 211. A trigger bending rod 212 is fixed on the upper side of the sliding block 26. When the drive motor 25 drives the sliding block 26 to move linearly along the guide rod 211, the upper end of the trigger bending rod 212 abuts against and pushes the main fixed platform 41 of the inner support assembly 4, thereby performing a material retraction displacement that is synchronously pulled apart to both sides.

[0038] In actual processing, after laser cutting is completed, the drive motor 25 receives a control signal and starts to reverse. The high-speed rotation of the ball screw 24 converts the torque into the linear translation of the sliding block 26. Under the guidance of the two guide rods 211, the sliding block 26 moves linearly along the guide rods 211. The end of the trigger bending rod 212 extends upward and abuts against and drives the inner support assembly 4 to move backward smoothly, thereby applying a stable axial tension to the pressure cylinder and then performing a material ejection displacement that pulls the material out to both sides simultaneously, thus realizing the automatic separation of the cut pipe section.

[0039] To prevent the ultra-thin-walled tube from bending during processing and unloading, each drive unit is equipped with at least two spaced support units. The two support units are arranged side-by-side on the side of the corresponding sliding block 26. Each support unit includes a support base 28, a support column, a V-shaped support 29, and several support balls 210. The support base 28 on one side is fixed to the trigger bending rod 212 via a connecting rod. The support bases 28 of the two side-by-side support units are connected by a transverse connecting rod. Interconnected to form a multi-point force-bearing support structure, the V-shaped support member 29 is vertically supported on the support base frame 28 by the support column, providing a contoured support surface, and several support balls 210 are equidistantly embedded along the upper V-shaped surface of the V-shaped support member 29, acting as a rolling friction-reducing medium. In order to further protect the outer surface of the pressure-bearing cylinder, the support balls 210 are made of non-metallic high-performance engineering plastics such as nylon or polyoxymethylene. This soft contact can prevent the metal balls from leaving rolling marks on the outer wall of the cylinder due to the hardness difference when rotating at high speed.

[0040] During the cutting preparation and rotary processing stages, the pressure-bearing cylinder is placed on the support unit. On the one hand, the rolling contact of the support ball 210 reduces the surface friction resistance of the pressure-bearing cylinder during rotation. During the unloading stage, when the sliding block 26 moves outward, it drags the support base 28 backward in sync through the connecting rod, so that the V-shaped support 29 is always supported below the center of gravity of the separated pipe section. On the other hand, as the sliding block 26 moves linearly, it provides synchronous follow-up support to the bottom of the cut and separated cylinder, providing uninterrupted dynamic support and preventing the ultra-thin-walled pipe from radially deflecting and bending due to loss of internal support force.

[0041] Two rotating mechanisms 3 are symmetrically fixed at both ends of the support bed 21 for centering, clamping, and driving the pressure cylinder to rotate. Each rotating mechanism 3 includes a T-shaped frame 31, a chuck base 32, a three-jaw chuck 33, and jaws 331; a driven pulley 34, a motor mounting base 35, a rotary motor 36, and a belt body 37. The T-shaped frame 31 is fixed at the end of the support bed 21, and the chuck base 32 is fixed on the side of the T-shaped frame 31, serving as the machining bearing reference for the rotary spindle. The bearings of the three-jaw chuck 33 are rotatably mounted on the side of the chuck base 32 for self-centering clamping and fixing of the end of the pressure cylinder. Driven pulley 34 is fixedly sleeved on the protruding end of the three-jaw chuck 33 protruding from the through hole of the chuck base 32. Rotary motor 36 is fixed to the chuck base 32 via motor mounting bracket 35. A drive pulley is fixed to the output end of rotary motor 36. The drive pulley is connected to driven pulley 34 via belt body 37. Driven pulley 34 is fixedly sleeved on the protruding end of the three-jaw chuck 33 protruding from the through hole of the chuck base 32 to drive the three-jaw chuck 33 to rotate smoothly. In addition, a slag collection box 38 is fixed to the side of the sliding block 26 of a set of drive units. The slag collection box 38 is used to collect waste slag that leaks from the cutting area.

[0042] Specifically, the surface of the jaws 331 of the three-jaw chuck that contacts the outer wall of the pressure-bearing cylinder is designed as a contoured arc surface that matches the outer diameter of the cylinder. This contoured design can evenly distribute the clamping force over a larger circumferential contact area. An anti-slip elastic layer is also fixed on the contoured arc surface by an adhesive process. This anti-slip elastic layer is made of nitrile rubber or fluororubber with a high coefficient of friction. Its function is to ensure that the cylinder does not slip axially or circumferentially during high-speed laser cutting by increasing static friction while maintaining extremely low radial clamping force, thereby preventing the ultra-thin-walled cylinder from undergoing radial diameter reduction deformation due to local stress concentration.

[0043] During the cutting operation, the rotary motors 36 on both sides start synchronously. The driving pulley at the output end of the rotary motor 36 is connected to the driven pulley 34 through the belt body 37. The flexible belt filters the high-frequency vibration during motor operation to ensure the cutting quality of the pipe wall, driving the three-jaw chuck 33 to rotate smoothly, thereby driving the pressure cylinder to rotate 360 ​​degrees at a uniform speed. This, in conjunction with the laser cutting head 13 fixed above, completes the processing of the annular slit. In addition, a slag collection box 38 is fixed on the side of the sliding block 26 of a set of drive units. During the unloading stroke, the slag collection box 38 moves synchronously with the sliding block 26, always remaining directly below the annular slit, to collect the waste slag that falls from the cutting area, achieving real-time and precise centralized collection of processing waste.

[0044] To achieve efficient internal support and auxiliary slag removal, two internal support components 4 are symmetrically arranged, respectively located between the corresponding rotating mechanism 3 and the pressure-bearing cylinder. Each internal support component 4 includes a main fixed platform 41, several sliding guide rails 43, several guide sliders 45, radially openable internal support blocks 44, and a central shaft 48 that can be moved through. One end of the central shaft 48 moves through the main fixed platform 41 and cooperates with it via a keyway. As the central action hub, it ensures smooth relative sliding while strictly limiting circumferential deflection through the keyway. Several sliding guide rails 43 are arranged circumferentially along the end face of the main fixed platform 41. One end of the inner support block 44 is slidably arranged on the sliding guide rail 43, which serves as the arc-shaped execution end that directly contacts and supports the pipe wall. Several guide sliders 45 are arranged in a straight line along the central axis 48. Several guide sliders 45 arranged in a straight line are defined as a group, and three groups are arranged in the circumferential direction to correspond to the inner support blocks 44 respectively. Several inner support blocks 44 are arranged circumferentially along the central axis 48. Opening and closing grooves 451 are opened on both sides of the guide slider 45, forming a component that uses the mechanical principle of inclined plane to convert axial tension into radial pushing and pulling force.

[0045] To ensure a damage-free internal support process, a polyurethane protective pad is wrapped around the arc-shaped surface of the inner support block 44 that contacts the inner wall of the pressure-bearing cylinder. This pad can compensate for the irregularity of the inner wall of the cylinder through its own slight elastic deformation, ensuring the uniform radial distribution of the support force. At the same time, the axial ends of the inner support block 44 are machined with smooth R-angle transitions to eliminate mechanical scratches caused by the sharp angles of the metal edges inside the pipe. Combined with the aforementioned in-situ expansion action of the inner support block 44, support for the inner wall of the ultra-thin-walled pressure-bearing cylinder is achieved.

[0046] Furthermore, the opening and closing slide 451 consists of a horizontal slide and a downward inclined slide. The inner support assembly 4 also includes several concave slide blocks 441 distributed in a straight line along the inner bottom surface of the inner support block 44. The concave slide blocks 441 are correspondingly arranged with the guide block 45. The inner wall surface of the vertical end of the concave slide block 441 has a ball. The ball is slidably arranged in the opening and closing slide 451. When the main fixed platform 41 and the central axis 48 are relatively displaced, the trajectory change of the opening and closing slide 451 can be converted into a radial push and pull of the inner support block 44 along the sliding guide rail 43.

[0047] When maintaining the tensioned state, the slider resides in the horizontal section of the opening and closing slide groove 451, and the inner support block 44 maintains its maximum outer diameter and presses tightly against the inner wall of the tube. When entering the unloading and demolding process, the main fixed platform 41 is forced to move outward, while the central axis 48 is suitable for restricted stagnation. The slider then slides across the horizontal section into the downward inclined slide groove. The downward component force generated by this inclined trajectory forcibly pulls the concave slide rail block 441 and the inner support block 44 to retract along the sliding guide rail 43 on the end face of the main fixed platform 41 towards the axis of the central axis 48, thereby relieving the radial positive pressure on the inner wall of the pressure-bearing cylinder and achieving frictionless physical separation.

[0048] To achieve efficient thermal protection and slag diversion at the bottom of the cutting kerf, the opposing extended ends of the central shafts 48 included in the two inner support components 4 are physically connected directly below the laser cutting area. Specifically, an axial through hole is provided on the end face of each central shaft 48 near the cutting center. One end of a horizontal shaft is slidably inserted into the axial through hole and connected to its inner wall by a connecting spring. The other end of the horizontal shaft extending outside the central shaft 48 is fixedly installed with a conical end 46 made of copper. The cross-section of the conical end 46 is a tapered frustum. When the left and right central shafts 48 are closed at the cutting center, the front faces of the two opposing conical ends 46 abut against each other, and their inclined surfaces fit together to form a V-shaped recessed groove with the opening facing upward and symmetrically aligned with the laser cutting trajectory above. This design utilizes the excellent thermal conductivity of copper to quickly conduct and dissipate the residual heat from the laser penetration after penetrating the ultra-thin tube wall, effectively preventing high-temperature slag from burning through the bottom tooling or forming stubborn adhesion on the surface.

[0049] In terms of spatial arrangement, an annular brush 47 for cleaning inside the pipe is coaxially fixed on the outer cylindrical surface of the aforementioned horizontal axis. From the axial arrangement, the annular brush 47 is confined between the front end face of the inner support block 44 and the rear large-diameter end face of the copper conical end 46. From the radial spatial relationship, the outer diameter of the bristles of the annular brush 47 is matched with the inner diameter of the pressure-bearing cylinder. Since the annular brush 47 is completely outside the front end of the inner support block 44 in the axial direction, when the inner support block 44 is guided downward by the opening and closing slide groove 451 to perform a radial retraction and avoidance action, its retraction trajectory is offset from that of the annular brush 47, and the two will not interfere with each other structurally.

[0050] In addition, in the initial assembly and processing state, a physical clearance is reserved between the front end face of the annular brush 47 fixed on the horizontal axis and the back of the front conical end 46. This clearance forms a heat radiation isolation zone in space, which not only cuts off the heat conduction path of the high temperature absorbed by the copper conical end 46 to the rear annular brush 47, but also avoids the carbonization and damage of the brush bristles caused by sparks or high temperature accumulation, thus extending the service life of the cleaning components.

[0051] Electromagnets are embedded in the end face of the rotating mechanism 3 and the corresponding near end face of the main fixed platform 41. The main fixed platform 41 is equipped with a control switch 42 to control the electromagnet to be energized. When the main fixed platform 41 moves with the sliding block 26 and abuts against the end face of the three-jaw chuck 33, the control switch 42 is triggered, thereby controlling the electromagnet to be energized to generate magnetic force. This magnetic force causes the main fixed platform 41 and the three-jaw chuck 33 to be attracted and locked, ensuring that the relative position of the two remains unchanged during processing and resetting. This design is used to cooperate with the slag discharge separation component 5 to execute differential speed linkage logic, ensuring the non-destructive clamping and unloading of ultra-thin wall pipes.

[0052] The slag separation components 5 are symmetrically arranged on both sides of the rotating mechanism 3 and are coaxially linked with the internal central shaft 48. Each set of slag separation components 5 is composed of a movable sleeve 51, a fixed sleeve 52, a return spring 53, and an inverted L-shaped rod 54 as a limiting structure. The fixed sleeve 52 is horizontally fixed to the inner wall of the through hole inside the rotating mechanism 3. The movable sleeve 51 is in the shape of a stepped shaft. One end of it passes through the rotating mechanism 3 and is rigidly connected to one end of the central shaft 48. The other end extends horizontally outward and passes through the through hole. The movable sleeve 51 moves through the fixed sleeve 52. The two are connected by a keyway to form a sliding connection. This keyway limiting method ensures that the circumferential angle of the movable sleeve 51 remains fixed when it moves back and forth with the drive unit, thereby ensuring that the opening direction of the slag discharge V-shaped groove at the front end of the central shaft 48 is always facing upward and aligned with the laser cutting point.

[0053] The inverted L-shaped rod 54 serves as a mechanical reference for absolute displacement. Its horizontal end is fixed to the side wall of the T-shaped frame 31, and its vertical end extends downwards, directly opposite the end of the movable sleeve rod 51. When the equipment completes the cutting and retraction stroke, the drive unit triggers the bending rod 212 to move the main fixed table 41 outwards. At this time, the movable sleeve rod 51 extends outwards from the rotating mechanism 3. When it moves to a preset distance, the vertical end of the inverted L-shaped rod 54 touches and rigidly blocks the end of the movable sleeve rod 51. Due to the mechanical interference, the central shaft 48 is forcibly locked in the current spatial position and stops.

[0054] Since the drive motor 25 is still pulling the main fixed platform 41 to continue to move outward, an axial relative displacement difference is generated between the main fixed platform 41 and the central shaft 48. This displacement difference guides the ball on the inner support block 44 to slide into the inclined section of the opening and closing slide groove 451, forcing the inner support block 44 to perform a radial shrinkage unloading action. At the same time, the copper conical end 46 at the front end of the central shaft 48 separates relative to each other, causing the accumulated slag to fall to the bottom. During the equipment reset stage, the slag discharge separation component 5 uses the reset spring 53 and electromagnet to reset the mechanism. The reset spring 53 is sleeved on the movable sleeve rod 51, with one end abutting against the inner wall of the fixed sleeve 52 and the other end abutting against the integrated protruding side of the movable sleeve rod 51.

[0055] When the equipment performs a reset and closing action, and the main fixed platform 41 retracts to the position abutting against the rotating mechanism 3, the control switch 42 is triggered, energizing the electromagnet and locking the main fixed platform 41 to the rotating mechanism 3. At this time, the reset spring 53 is under high pressure compression. During a new round of feeding and tightening, the control system de-energizes the electromagnet, and the reset spring 53 instantly releases its elastic force, driving the movable sleeve 51 and the central shaft 48 to quickly reset and move. This action drives the inclined surface of the opening and closing slide 451 to push the sliding ball, causing the inner support block 44 to perform in-situ radial expansion relative to the pressure-bearing cylinder. Since the outer main fixed platform 41 is stationary at this time, the inner support block 44 only pops out radially, eliminating the axial tensile force and thus protecting the inner wall of the ultra-thin-walled cylinder from scratches.

[0056] Working Principle: After the laser cutting head 13 completes the circumferential cutting of the ultra-thin-walled pressure cylinder, the active clamping state of the three-jaw chuck 33 is released, and the jaws 331 loosen their restraint on the outer wall of the pressure cylinder. Subsequently, two sets of symmetrically arranged drive motors 25 start synchronously, driving the ball screws 24 to rotate, which in turn drives the sliding blocks 26 on both sides to perform linear retraction and translation along the guide rods 211 to both ends of the bed. During this process, the sliding blocks 26 push the main fixed table 41 to move outward synchronously through the trigger bending rods 212. Since the inner support block 44 of the inner support assembly 4 is still in a radially expanding state at this time, it maintains close contact with the inner wall of the pressure cylinder, thereby causing the two pressure cylinder segments after cutting and separation to move to both sides. At the same time, the V-shaped support 29 located on the side of the sliding block 26 dynamically supports the bottom of the separated segments, ensuring that the pressure cylinder segments remain in a horizontal and stable state during axial movement, thereby achieving physical avoidance of the cutting area and facilitating subsequent unloading operations.

[0057] As the mechanism continues to move laterally, the action logic of the slag discharge separation component 5 is passively triggered. The movable sleeve 51 extends outward with the central shaft 48 until its end contacts and abuts against the vertical end of the inverted L-shaped rod 54. Due to the mechanical rigidity limiting effect, the central shaft 48 is forced to stop its axial movement. At this time, the drive motor 25 continues to drive the sliding block 26 and the main fixed platform 41 to move outward, so that a relative displacement difference is generated between the main fixed platform 41 and the central shaft 48. Under the action of this displacement difference, the inner support block 44 first slides in the horizontal sliding groove section of the opening and closing sliding groove 451 through the concave sliding rail block 441, causing the front end of the central shaft 48 to push forward relative to the end of the cylinder.

[0058] During this process, the conical ends 46 of the joint separate, and the high-temperature welding slag accumulated on them loses its physical enclosure, sliding down the copper conical surface into the welding slag collection box 38 below. Simultaneously, the accompanying annular brush 47 performs a sweeping cleaning of the inner wall of the pressure-bearing cylinder. As the displacement difference further increases, the concave slide block 441 moves from the horizontal slide section to the inclined slide section, guiding several inner support blocks 44 to overcome resistance and retract radially towards the center, thereby releasing the support for the inner wall of the pressure-bearing cylinder. When the main fixed platform 41 moves to the end of its stroke and touches the control switch 42 located on its end face, the electromagnet is energized to generate magnetic force, causing the end face of the three-jaw chuck 33 to tightly engage and lock with the main fixed platform 41. At this time, the cut and separated pipe fittings are only supported by the support unit, and can be unloaded manually or by a robotic arm.

[0059] When the pipe fittings are removed and the equipment is ready to process a new batch of pressure cylinders, the equipment enters the reset process. The drive motor 25 receives a reverse command and drives the sliding blocks 26 on both sides and the mounted components to gradually move towards the cutting center. When the mechanism resets to the preset position, the electromagnet is de-energized and locked through the human-machine interface control system. At this time, the reset spring 53, which is in a compressed state, releases its elastic force. This elastic force pushes the movable sleeve rod 51 and the connected central shaft 48 to extend forward rapidly relative to the main fixed table 41. This causes the inclined trajectory of the opening and closing slide groove 451 to push the concave slide rail block 441 again, forcing the inner support block 44 to perform a radial expansion action along the sliding guide rail 43 on the end face of the main fixed table 41. The inner support assembly 4 is thus re-supported and inserted into the inner wall of the new pressure cylinder.

[0060] To eliminate the impact of the instantaneous spring ejection on the ultra-thin-walled pipe, a damping buffer structure (such as a hydraulic damper or air cushion buffer) is provided between the movable sleeve 51 and the fixed sleeve 52, allowing the central shaft 48 to drive the inner support block 44 to extend forward smoothly at a controlled constant speed. During this process, the inclined trajectory of the opening and closing slide groove 451 guides the inner support block 44 to slowly and evenly conform to the inner wall of the pressure-bearing cylinder to perform radial expansion. This smooth expansion action limited by damping not only eliminates the physical impact of the inner support block 44 at the moment of contact, avoiding local dent deformation of the ultra-thin-walled pipe, but also avoids scratches on the inner surface of the pipe by axial pulling through in-situ expansion, ensuring damage-free support.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A machining equipment for ultra-thin-walled pump bodies, used for laser cutting of ultra-thin-walled pressure-bearing cylinders of pump bodies, characterized in that, include Laser cutting mechanism (1); The support assembly (2) is located at the bottom of the laser cutting mechanism (1) and has a support bed (21) and two sets of drive units symmetrically arranged thereon. The drive units are used to provide support and linear drive force for retraction to both sides. Two rotating mechanisms (3) are symmetrically provided and are respectively fixed at both ends of the support bed (21) for centering, clamping and driving the pressure cylinder to rotate; Two inner support components (4) are symmetrically provided and are respectively located between the corresponding rotating mechanism (3) and the pressure-bearing cylinder. Each includes an inner support block (44) that can be opened and closed radially and a central shaft (48) that can be moved through. The ends of the central shaft (48) of the two inner support components (4) are joined together in the cutting area to form a V-shaped sinking trough for receiving molten slag. Two slag discharge separation components (5) are symmetrically arranged, and are respectively connected to the central shaft (48) through the corresponding rotating mechanism (3). Both have a limiting structure to restrict the axial retraction of the central shaft (48). When the driving units on both sides drive the corresponding inner support components (4) to retreat outward, the limiting structure forces the central shaft (48) to stop. Using the resulting relative displacement difference, the inner support block (44) is driven to radially retract and unload, and the leakage slag and pipe cleaning actions are performed simultaneously through the relative extension of the central shaft (48).

2. The ultra-thin-wall pump body machining equipment according to claim 1, characterized in that: Each of the inner support components (4) further includes a main fixed platform (41), a plurality of sliding guide rails (43) and a plurality of guide blocks (45). One end of the central shaft (48) movably passes through the main fixed platform (41) and engages with it via a keyway. A plurality of sliding guide rails (43) are arranged circumferentially along the end face of the main fixed platform (41). One end of the inner support block (44) is correspondingly slidably disposed on the sliding guide rails (43). A plurality of guide blocks (45) are arranged along the straight direction of the central shaft (48) and guide the straight... A group of linearly arranged guide blocks (45) are defined as a set, and three groups are arranged along the circumferential direction to correspond to the inner support block (44) respectively. A number of inner support blocks (44) are arranged along the circumferential direction of the central axis (48). Opening and closing grooves (451) are provided on both sides of the guide blocks (45), which are used to convert the trajectory change of the opening and closing grooves (451) into radial pushing and pulling of the inner support block (44) along the sliding guide rail (43) by the relative displacement generated between the main fixed platform (41) and the central axis (48).

3. The ultra-thin wall pump body machining equipment according to claim 2, characterized in that: The opening and closing slide groove (451) consists of a horizontal slide groove and a downward inclined slide groove. The inner support assembly (4) also includes a number of concave slide rail blocks (441) that are linearly distributed along the inner bottom surface of the inner support block (44). The concave slide rail blocks (441) are correspondingly arranged with the guide block (45). The inner wall surface of the vertical end of the concave slide rail block (441) has a ball. The ball is slidably arranged in the opening and closing slide groove (451) and is used to guide the inner support block (44) to generate radial contraction inward to separate from the inner wall of the pressure cylinder by smoothly transitioning from the horizontal slide groove and sliding into the inclined slide groove during the material discharge separation stroke.

4. The ultra-thin wall pump body machining equipment according to claim 2, characterized in that: A tapered end (46) extends into one end of the central shaft (48) via a horizontal axis. The tapered end (46) is made of copper. The tapered ends (46) of the two inner support components (4) are initially joined to form a V-shaped recessed groove aligned with the laser cutting area. The inner support component (4) also includes an annular brush (47) fixedly sleeved on the horizontal axis. The annular brush (47) is located between the front side of one end of the inner support block (44) and the rear side of the tapered end (46). In the initial state, there is a clearance between the annular brush (47) and the tapered end (46). When the central shaft (48) extends forward relative to the tube body, the joined tapered ends (46) are separated to allow the molten slag that has lost its coating to fall off. The annular brush (47) is pushed forward with the movement to clean the inner wall of the pressure-bearing cylinder end.

5. The ultra-thin wall pump body machining equipment according to claim 2, characterized in that: Each of the slag separation components (5) includes a movable sleeve (51) and a fixed sleeve (52). The limiting structure is an inverted L-shaped rod (54). The rotating mechanism (3) has a through hole on the same horizontal line inside. One end of the movable sleeve (51) is connected to one end of the central shaft (48), and the other end passes horizontally through the through hole. The fixed sleeve (52) is horizontally fixed inside the through hole. The movable sleeve (51) moves through the fixed sleeve (52) and cooperates with the keyway. The horizontal end of the inverted L-shaped rod (54) is fixed to the outer side of the rotating mechanism (3) and is used to touch and block the end of the movable sleeve (51) by its vertical end during the overall retraction stroke, so as to achieve the stopping and limiting of the central shaft (48).

6. The ultra-thin wall pump body machining equipment according to claim 5, characterized in that: The slag separation assembly (5) also includes a reset spring (53) sleeved on the movable sleeve (51). One end of the reset spring (53) is connected to one end of the inner wall of the fixed sleeve (52), and the other end is connected to the side of the protrusion integrally provided on the movable sleeve (51). Electromagnets are embedded in the end face of the rotating mechanism (3) and the corresponding near end face of the main fixed platform (41). The main fixed platform (41) is provided with a control switch (42) for controlling the electromagnet to be energized. When the equipment is reset and closed and the electromagnet is de-energized, the elastic force released by the reset spring (53) drives the movable sleeve (51) and the central shaft (48) to reset and move, so as to guide the inner support block (44) to perform in-situ radial expansion relative to the pressure cylinder by using the trajectory of the opening and closing slide (451).

7. The ultra-thin wall pump body machining equipment according to claim 1, characterized in that: The two sets of drive units of the support assembly (2) are symmetrically arranged longitudinally along the support bed (21). Each set of drive units includes a ball screw (24), a drive motor (25), a sliding block (26), a support base plate (27), and two guide rods (211). The support base plate (27) is horizontally fixed inside the support bed (21) near the center. The ball screw (24) is horizontally arranged, and its two ends are rotatably mounted between the inner wall of the end of the support bed (21) and the support base plate (27) through bearing seats. The drive motor (25) is embedded and fixed at the end of the support bed (21), and its output end is coaxially connected to the ball screw (24). The guide rods (211) are symmetrically distributed on both sides of the ball screw (24), and their two ends are fixed between the inner wall of the support bed (21) and the support base plate (27). The center thread of the sliding block (26) is threaded on the ball screw (24), and its two sides slide through the corresponding guide rods (211). The upper side of the sliding block (26) is fixed with a trigger bending rod (212), which is used to abut and push the main fixed table (41) of the inner support assembly (4) through the upward extension end of the trigger bending rod (212) when the drive motor (25) drives the sliding block (26) to make a linear translation along the guide rod (211), so as to perform a material retraction displacement that is synchronously pulled open to both sides.

8. The ultra-thin wall pump body machining equipment according to claim 7, characterized in that: Each set of driving units is provided with at least two support units spaced apart. The two support units are arranged side by side on the side of the corresponding sliding block (26). Each support unit includes a support base (28), a support column, a V-shaped support (29), and several support balls (210). The support base (28) on one side is fixed to the trigger bending rod (212) by a connecting rod. The support bases (28) of the two support units arranged side by side are connected by a transverse... The connecting rods are interconnected, and the V-shaped support (29) is vertically supported on the support base (28) by the support column. A number of support balls (210) are equidistantly embedded along the upper V-shaped surface of the V-shaped support (29) for placing the pressure cylinder. The rolling contact reduces the frictional resistance when the pressure cylinder rotates, and the ball ball provides synchronous follow-up support to the bottom of the cut and separated cylinder as the sliding block (26) moves linearly, so as to prevent the ultra-thin wall tube from undergoing radial bending deformation due to loss of internal support.

9. The ultra-thin wall pump body machining equipment according to claim 7, characterized in that: Each of the aforementioned rotating mechanisms (3) includes a T-shaped frame (31), a chuck base (32), a three-jaw chuck (33), a driven pulley (34), a motor mounting base (35), a rotary motor (36), and a belt body (37). The T-shaped frame (31) is fixed at the end of the support bed (21), the chuck base (32) is fixed to the side of the T-shaped frame (31), the three-jaw chuck (33) is rotatably mounted on the side of the chuck base (32), and the driven pulley (34) is fixedly sleeved on the three-jaw chuck. (33) protrudes from the through hole of the chuck base (32). The rotary motor (36) is fixed on the chuck base (32) by the motor mounting seat (35). The output end of the rotary motor (36) has a drive pulley. The drive pulley is connected to the driven pulley (34) through the belt body (37) to drive the three-jaw chuck (33) to rotate. A set of sliding blocks (26) of the drive unit is also fixed with a slag collection box (38) for receiving the waste slag that falls from the V-shaped sinking trough.

10. The ultra-thin wall pump body machining equipment according to claim 1, characterized in that: Linear guide rails (22) are fixed on both sides of the upper end face of the support bed (21). One side of a set of linear guide rails (22) has a transmission rack (23). The laser cutting mechanism (1) includes a cabinet shell (11), a linear motion module (12) and a laser cutting head (13). The cabinet shell (11) is slidably mounted on two linear guide rails (22), and a drive gear that meshes with the transmission rack (23) is fixed on the bottom frame by a drive component. The linear motion module (12) is horizontally fixed inside the cabinet shell (11) and a vertical cylinder is provided at the sliding end. The laser cutting head (13) is located at the extension end of the cylinder and is used to adjust the horizontal addressing position and vertical focusing height of the laser cutting head (13).

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