Automatic rotary cutting device for industrial pump impeller

Abstract

The invention relates to the technical field of cutting machine tools, in particular to an automatic rotary cutting device for an industrial pump impeller, which comprises a machine tool, a movable pedestal and a laser cutting head, and an additional seat is arranged on the movable pedestal; the bottom of the additional seat is connected with a biased rotating guide rail through a rotating shaft driven by a motor; a laser cutting head is mounted at the tail end of the telescopic rod through a hanging seat; when the laser cutting head is located under the rotating shaft, the laser cutting head is in a three-axis linkage cutting mode, and when the laser cutting head is biased, the laser cutting head is in a rotary cutting mode. The lifting seat is provided with a double-layer protection structure, an outer layer protection structure comprises a lifting type sleeve installed on the lifting seat, an expansion end head structure is installed on the sleeve, the sleeve provides protection for the laser cutting head after moving downwards, and the expansion end head structure enters a side clamping groove in the rotating guide rail after the sleeve moves upwards. The inner layer protection comprises a supporting system consisting of a fixed ball guide rod and a movable ball guide rod; and efficient and high-precision impeller cutting can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of cutting machine tools, in particular to an automatic rotary cutting device for an industrial pump impeller. Background Art

[0002] As the core component of fluid conveying equipment, industrial pump impellers are widely used in petrochemical, electric power, water conservancy, metallurgy and other fields. Their performance directly affects the efficiency and service life of the pump. The impeller is usually composed of a cover plate and blades, with a complex structure and high requirements for processing accuracy. Traditional impeller processing methods mainly include casting, milling and welding. Although the cast impeller can achieve complex shapes, there are problems such as low material utilization and large subsequent processing volume; and although the milling process has high precision, the processing cycle is long and the cost is high, especially for high-hardness materials. The processing efficiency is low.

[0003] In recent years, laser cutting technology has gradually become an important means of impeller processing due to its high precision, non-contact processing and adaptability to complex shapes. In impeller processing, existing laser cutting equipment is mainly used for cutting and forming the blanks of impeller blades and cover plates. Among them, impeller blades are mostly curved structures, and three-axis laser cutting requires frequent path adjustment. When processing circular cover plates, their circular forming also relies on three-axis linkage. The equipment load is large, and repeated positioning errors can easily lead to dimensional deviations. In addition, the existing laser cutting equipment does not provide sufficient protection for the cutting head. When loading metal sheets, the laser head is easily affected by collisions, resulting in reduced cutting accuracy. At the same time, the waste or finished products after cutting are easily stuck in the cutting seam, requiring manual intervention, affecting the continuity of automated production. Summary of the invention

[0004] The object of the present invention is to provide an automatic rotary cutting device for an industrial pump impeller, so as to achieve the purpose of efficient and high-precision impeller cutting, and to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an automatic rotary cutting device for an industrial pump impeller, comprising a machine tool, a movable pedestal, and a laser cutting head, wherein an additional seat is provided on the movable pedestal; The bottom of the additional seat is connected to an offset rotating guide rail through a rotating shaft driven by a motor; a telescopic rod is provided on the rotating guide rail, and a laser cutting head is installed at the end of the telescopic rod through a hanging seat; when the laser cutting head is located directly below the rotating shaft, it is a three-axis linkage cutting mode, and when the laser cutting head is offset, it is a rotating cutting mode; A double-layer protection structure is provided on the hanging seat. The outer protection includes a lifting sleeve installed on the hanging seat. An expansion head structure is installed on the sleeve. After the sleeve moves down, it provides protection for the laser cutting head. After the sleeve moves up, the expansion head structure enters the side slot on the rotating guide rail. The hanging seat is positioned through the expansion connection of the expansion head structure. The inner protection includes a support system composed of a fixed ball guide rod and a movable ball guide rod. The fixed ball guide rod and the movable ball guide rod are installed on the ring seat. The ball guide rods are dispersed around the laser cutting head through elastic members for protection. When the sleeve moves upward, the movable ball guide rods can be gathered on both sides of the fixed ball guide rod to provide unilateral moving support for the laser cutting head.

[0006] Preferably, a knocking rod is hinged on the side wall of the sleeve, forming a linkage blanking mechanism with the stop rod on the hanging seat; When the sleeve moves upward, the knocking rod is compressed by the stop rod and warps upward. When the sleeve moves downward, the knocking rod resets and drops vertically.

[0007] Preferably, the rotary guide rail realizes 360° rotation through a rotating shaft driven by a motor; The telescopic rod adjusts its radial position on the rotary guide rail through a lead screw transmission mechanism to change the circular cutting radius of the laser cutting head.

[0008] Preferably, the lifting sleeve realizes lifting movement through the drive of a cylinder. When the sleeve descends, it completely wraps the laser cutting head. When it rises, it exposes the laser cutting head for cutting operations.

[0009] Preferably, the expansion end structure includes a base, an end block connected by a spring guide rod, and an expandable friction increasing sleeve. When the sleeve rises, the friction increasing sleeve expands in the side card slot to generate frictional locking.

[0010] Preferably, the outer surface of the friction increasing sleeve is provided with anti-slip lines, and the inner wall of the side card slot is provided with a matching friction cushion layer, and the two cooperate to achieve reliable frictional locking.

[0011] Preferably, the number of movable ball guide rods is at least 6, symmetrically distributed around the fixed ball guide rod, and kept in a dispersed state through elastic members.

[0012] Preferably, the movable ball guide rod is connected to the sleeve through a steel wire linkage mechanism. When the sleeve rises, the movable ball guide rod is pulled by the steel wire to approach the fixed ball guide rod.

[0013] Preferably, balls are installed at the bottom ends of the fixed ball guide rod and the movable ball guide rod, and the balls contact the surface of the workpiece during operation to provide support.

[0014] Preferably, in the three-axis linkage cutting mode, the moving pedestal controls the laser cutting head to complete complex contour cutting through the X, Y, and Z axis movements.

[0015] Preferably, in the rotary cutting mode, the moving pedestal remains stationary, and the laser cutting head is driven by the rotation of the rotating shaft to complete circular cutting.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the collaborative design of the rotating guide rail and the three-axis moving pedestal, the flexible switching processing between cutting the impeller cover plate along a circular trajectory and cutting the blade along a complex trajectory is realized. In the rotating cutting mode, the moving pedestal is stationary, and only the rotation shaft drive is required to complete high-precision circular forming, significantly reducing the calculation load of the three-axis linkage and improving the processing efficiency. When cutting complex blades, the laser cutting head returns directly below the rotation shaft, and the path is precisely controlled by the three-axis system to meet diverse processing requirements.

[0017] 2. The present invention improves the accuracy and reliability of the laser cutting head through a double-layer protection structure. The outer layer protection is a sleeve controlled by a cylinder, which surrounds the laser cutting head in the non-working state to avoid damage caused by collision during loading. In the working state, the friction locking mechanism between the expansion end structure and the side card slot effectively suppresses vibration and offset, ensuring stability during rotary cutting. The inner layer protection, through the linkage of the movable ball guide rod under the elastic member and the steel wire rope, can not only surround and protect the laser head but also gather into a support structure during cutting, contacting the plate through the ball, providing both anti-collision and dynamic support, and double guaranteeing the cutting accuracy.

[0018] 3. Through the linkage design of the knocking rod and the blocking rod, the present invention automatically triggers the knocking of the plate when the sleeve descends, promoting the separation of the cut workpiece and avoiding the problem of manual intervention due to material jamming, thus enhancing the automation level of continuous production. Brief Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the machine tool of the present invention.

[0020] Figure 2 It is the first schematic diagram of the cutting part structure of the present invention.

[0021] Figure 3 It is the second schematic diagram of the cutting part structure of the present invention.

[0022] Figure 4 It is a schematic diagram of the rotating guide rail and the laser head structure of the present invention.

[0023] Figure 5 It is a schematic diagram of the laser cutting head installation structure of the present invention.

[0024] Figure 6 It is a schematic diagram of the double-layer protection structure of the present invention.

[0025] Figure 7 It is a schematic diagram of the ball guide rod structure of the present invention.

[0026] Figure 8 It is a schematic diagram of the sleeve structure of the present invention.

[0027] Figure 9 It is a schematic diagram of the expansion end structure of the present invention.

[0028] Figure 10 This is a schematic diagram of the ball guide rod mounting structure of the present invention.

[0029] Figure 11 This is a schematic diagram of the ball guide rod control structure of the present invention.

[0030] In the figure: 1, machine tool; 2, moving pedestal; 3, additional seat; 4, rotating shaft; 5, rotating guide rail; 6, telescopic rod; 7, hanging seat; 8, laser cutting head; 9, guide groove; 10, limiting guide rod; 11, sleeve; 12, cylinder; 13, base; 14, spring guide rod; 15, end block; 16, lower support rod; 17, upper support rod; 18, friction increasing sleeve; 19, side card slot; 20, cushion layer; 21, ring seat; 22, end seat; 23, fixed ball guide rod; 24, movable ball guide rod; 25, sliding seat; 26, elastic member; 27, ball; 28, connecting block; 29, steel wire rope; 30, through groove; 31, hinge seat; 32, knocking rod; 33, side block; 34, blocking rod. Specific embodiments

[0031] Next, in combination with the accompanying drawings and specific embodiments, the present invention will be further described. It should be noted that, on the premise of no conflict, any combination can be formed among the following-described embodiments or technical features to form new embodiments. It should be known that the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0032] Please refer to Figures 1 to 11 , the present invention provides a technical solution: an automatic rotary cutting device for an industrial pump impeller, which belongs to a part of an intelligent welding system for the processing of industrial pump impellers and is used for the forming processing of impeller component blanks. This automatic rotary cutting device is used to cut a finished metal plate into a certain shape to process the blanks of circular impeller covers and fan-shaped impeller blades for subsequent processing and assembly.

[0033] This automatic rotary cutting device is a laser cutting structure, and its basis is a table-type machine tool 1. A three-axis moving pedestal 2 is installed on the machine tool 1. The moving pedestal 2 is installed through three tracks of the X-axis, Y-axis, and Z-axis. After placing a metal plate on the machine tool 1, the moving pedestal 2 can move the laser cutting head 8 to any point of the metal plate for cutting, and move it in cooperation with an accurate three-axis control system to complete the sizing processing of the impeller components.

[0034] An additional seat 3 is provided on the mobile pedestal 2 of the present invention. A rotating shaft 4 is installed at the bottom of the additional seat 3. The rotating shaft 4 is controlled by a motor drive group in the additional seat 3. A rotating guide rail 5 is fixedly installed at the bottom end of the rotating shaft 4. The rotating guide rail 5 is offset and installed on the rotating shaft 4. And a telescopic rod 6 is driven and installed on the rotating guide rail 5. The telescopic rod 6 is controlled by a lead screw assembly and can move at a fixed point in the rotating guide rail 5. A suspension seat 7 is installed at the end of the telescopic rod 6 in the rotating guide rail 5. The laser cutting head 8 is installed through the suspension seat 7. When the telescopic rod 6 drives the suspension seat 7 to move to the proximal end of the additional seat 3, the laser cutting head 8 is directly below the rotating shaft 4. At this time, the rotating shaft 4 is in a stationary state. The laser cutting head 8 is directly controlled by the mobile pedestal 2 to move and cut according to a set trajectory, mainly for processing the complex blade structure of the impeller. Conversely, when the telescopic rod 6 drives the suspension seat 7 to move to the distal end of the additional seat 3, the laser cutting head 8 is offset and installed on the rotating shaft 4 through the rotating guide rail 5. At this time, the mobile pedestal 2 can be in a stationary state. The rotating shaft 4 drives the rotating guide rail 5 to rotate automatically. The laser cutting head 8 moves in a circular trajectory for cutting, mainly for processing the circular impeller cover plate. By adjusting the fixed-point movement of the telescopic rod 6, cover plates of different sizes can be processed. The mobile pedestal 2 is mainly used to drive the laser cutting head 8 to change the cutting position, without the need for complex three-axis calculations and movements, improving the processing efficiency of the cover plate.

[0035] Further, in order to improve the cutting accuracy of the laser cutting head 8, the present invention is provided with a double-layer protection structure for the laser cutting head 8 to prevent the laser cutting head 8 from being damaged and affecting the accuracy. First, an outer protection structure is provided on the suspension seat 7. Guide grooves 9 are provided on both sides of the suspension seat 7. A limiting guide rod 10 is installed in a limited and movable manner through the guide grooves 9. A sleeve 11 is fixedly installed at the bottom end of the limiting guide rod 10. The sleeve 11 is controlled to lift and lower by a cylinder 12. When the laser cutting head 8 is in a non-working state, the cylinder 12 lowers the sleeve 11, and the sleeve 11 can surround the laser cutting head 8 to prevent the laser cutting head 8 from being damaged by the impact of foreign objects during the placement of the metal plate. At the same time, an expansion end structure is provided at the end of the limiting guide rod 10. The expansion end structure can provide an auxiliary fixing effect for the suspension seat 7 and the laser cutting head 8 after the sleeve 11 moves upward, ensuring that the laser cutting head 8 can rotate and cut along with the rotating guide rail 5.

[0036] The expansion end structure includes a base 13 fixedly installed at the top of the limit guide rod 10. A end block 15 is movably installed on the base 13 through a spring guide rod 14. A deformable friction increasing sleeve 18 is connected between the base 13 and the end block 15. Threads, blocks, etc. are provided on the outer wall of the friction increasing sleeve 18. A lower support rod 16 is installed on the base 13 for one-way rotation, and an upper support rod 17 is installed on the end block 15 for one-way rotation. The lower support rod 16 and the upper support rod 17 are hinged. Side slots 19 are provided on both sides of the rotary guide rail 5, and a cushion layer 20 is provided on the inner wall of the side slots 19. After the sleeve 11 moves upward, the expansion end structure enters the side slots 19. The end block 15 is squeezed by the side slots 19 and moves towards the base 13. The upper support rod 17 and the lower support rod 16 can rotate and expand outward, squeezing the friction increasing sleeve 18 from the inside, so that the friction increasing sleeve 18 expands in the side slots 19. The friction increasing sleeve 18 and the cushion layer 20 are engaged with each other to generate resistance, and together with the self-positioning ability of the telescopic rod 6, the suspension seat 7 will not shift after the adjustment is completed, ensuring the processing accuracy of the laser cutting head 8.

[0037] Secondly, an inner protection structure is provided on the laser cutting head 8. The inner protection structure can also provide a rotational support function for the laser cutting head 8. A ring seat 21 is provided on the laser cutting head 8, and a vertical end seat 22 is installed on one side of the ring seat 21. A fixed ball guide rod 23 is installed below the end seat 22. An active ball guide rod 24 is slidably installed in the ring seat 21. There are at least six active ball guide rods 24, and the active ball guide rods 24 are symmetrically arranged on both sides of the fixed ball guide rod 23. The top end of the active ball guide rod 24 is installed with a moving slide seat 25, which is connected to the ring seat 21 through the slide seat 25. An elastic member 26 is connected between the slide seats 25 belonging to both sides of the fixed ball guide rod 23. An elastic member 26 is also connected between the slide seat 25 close to the fixed ball guide rod 23 and the top end of the fixed ball guide rod 23. Through the elastic force of the elastic member 26, the active ball guide rods 24 on both sides of the fixed ball guide rod 23 can be spread out, so as to surround the laser cutting head 8, and cooperate with the sleeve 11 to provide a protection function for the laser cutting head 8. At the same time, a vertical through groove 30 is provided on the end seat 22. A connecting block 28 is installed in a limited way through the through groove 30. The connecting block 28 is fixedly connected to the sleeve 11. The connecting block 28 is also connected to the two slide seats 25 farthest from the fixed ball guide rod 23 through a steel rope 29. When the sleeve 11 rises to expose the laser cutting head 8 and enter the working state, the sleeve 11 can also drive the connecting block 28 to move upward, and then generate a pulling force on the two end slide seats 25 through the steel rope 29, so that all the active ball guide rods 24 overcome the elastic force of the elastic member 26 and move together, fitting on both sides of the fixed ball guide rod 23. At this time, both the fixed ball guide rod 23 and the active ball guide rods 24 are located on the periphery of the workpiece to be cut. Ball bearings 27 are provided at the bottom ends of the fixed ball guide rod 23 and the active ball guide rods 24. Therefore, all the ball guide rods contact the non-cut part of the metal plate through the ball bearings 27, providing a moving support function for the laser cutting head 8, ensuring the cutting accuracy, and not affecting the normal cutting process and not generating pressure on the cut part.

[0038] A knocking rod 32 is also rotatably installed on the side wall of the sleeve 11 through a hinge seat 31. The knocking rod 32 is in a drooping state under normal circumstances, and its bottom end can contact the metal plate. A stop rod 34 is vertically installed on the hanging seat 7 through a side seat. The stop rod 34 is above the top end of the knocking rod 32. When the sleeve 11 moves upward, the stop rod 34 can generate a pressure on the top end of the knocking rod 32, making the knocking rod 32 turn into an upturned state. At this time, it will not affect the normal cutting work of the laser cutting head 8. After a workpiece is cut, the sleeve 11 can move downward, and the pressure on the knocking rod 32 disappears, and it can return to the drooping state, so as to contact the metal plate for knocking, making the plate generate slight vibrations, and avoiding the workpiece being stuck in the cut seam and not falling off.

[0039] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic rotary cutting device for an industrial pump impeller, comprising a machine tool, a moving pedestal, and a laser cutting head, characterized in that: An additional seat is provided on the mobile pedestal; The bottom of the additional seat is connected to a rotation guide rail installed offset through a rotating shaft driven by a motor; a telescopic rod is provided on the rotation guide rail, and the end of the telescopic rod is installed with a laser cutting head through a hanging seat; when the laser cutting head is directly below the rotating shaft, it is in a three-axis linkage cutting mode, and when the laser cutting head is offset, it is in a rotary cutting mode; The hanging seat is provided with a double-layer protection structure composed of an outer layer protection and an inner layer protection. The outer layer protection includes a lifting sleeve installed on the hanging seat, and an expansion end structure is installed on the sleeve. After the sleeve moves down, it provides protection for the laser cutting head, and after the sleeve moves up, the expansion end structure enters the side card slot on the rotation guide rail, and the hanging seat is positioned through the expansion connection of the expansion end structure; The inner layer protection includes a support system composed of a fixed ball guide rod and a movable ball guide rod. The fixed ball guide rod and the movable ball guide rod are installed on the ring seat, and the ball guide rods are dispersed around the laser cutting head through elastic members for protection. When the sleeve moves up, the movable ball guide rods can gather on both sides of the fixed ball guide rod to provide unilateral moving support for the laser cutting head.

2. The automatic rotary cutting device for an industrial pump impeller according to claim 1, characterized in that: A knocking rod is hinged on the side wall of the sleeve, and forms a linkage blanking mechanism with a stop rod on the hanging seat; When the sleeve moves up, the knocking rod is compressed by the stop rod and warps up, and when the sleeve moves down, the knocking rod resets and drops.

3. An automatic rotary cutting device for an industrial pump impeller according to claim 1, characterized in that: The rotation guide rail realizes 360° rotation through a rotating shaft driven by a motor; The telescopic rod adjusts its radial position on the rotation guide rail through a lead screw transmission mechanism to change the circular cutting radius of the laser cutting head.

4. An automatic rotary cutting device for an industrial pump impeller according to claim 1, characterized in that: The lifting sleeve realizes lifting movement through a cylinder drive. When the sleeve descends, it completely wraps the laser cutting head, and when it ascends, it exposes the laser cutting head for cutting operations.

5. An automatic rotary cutting device for an industrial pump impeller according to claim 1, characterized in that: The expansion end structure includes a base, an end block connected by a spring guide rod, and an expandable friction increasing sleeve. When the sleeve ascends, the friction increasing sleeve expands in the side card slot to generate frictional locking.

6. The automatic rotary cutting device for an industrial pump impeller according to claim 5, characterized in that: The outer surface of the friction increasing sleeve is provided with anti-slip lines, and the inner wall of the side card slot is provided with a matching friction cushion layer, and the two cooperate to achieve reliable frictional locking.

7. An automatic rotary cutting device for an industrial pump impeller according to claim 1, characterized in that: The number of the movable ball guide rods is at least 6, symmetrically distributed around the fixed ball guide rod, and maintained in a dispersed state through elastic members.

8. An automatic rotary cutting device for an industrial pump impeller according to claim 7, characterized in that: The movable ball guide rods are connected to the sleeve through a steel wire linkage mechanism. When the sleeve ascends, the movable ball guide rods are pulled by the steel wire to approach the fixed ball guide rod.

9. An automatic rotary cutting device for an industrial pump impeller according to claim 1, characterized in that: Both the bottom ends of the fixed ball guide rod and the movable ball guide rod are installed with balls, and the balls contact the surface of the workpiece during work to provide support.

10. An automatic rotary cutting device for an industrial pump impeller according to claim 1, characterized in that: In the three-axis linkage cutting mode, the mobile pedestal controls the laser cutting head to complete complex contour cutting through the X, Y, and Z axis movements.

11. An automatic rotary cutting device for an industrial pump impeller according to claim 1, characterized in that: In the rotary cutting mode, the mobile pedestal remains stationary, and the rotation of the rotating shaft drives the laser cutting head to complete circular cutting.

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