A precision grinding and polishing machine for the end face of a scroll plate

Abstract

The application relates to the technical field of scroll disc processing equipment, in particular to a scroll disc end face precision grinding and polishing machine, which comprises a workbench, a supporting top plate arranged on the top of the workbench and a multi-station indexing rotary table arranged in the workbench, four circumferentially-distributed grinding processing devices are arranged between the multi-station indexing rotary table and the supporting top plate, and four workpiece centering clamping mechanisms are arranged on the top surface of the multi-station indexing rotary table and correspond to the four grinding processing devices. The scroll disc end face precision grinding and polishing machine is characterized in that the multi-station indexing rotary table is matched with the four circumferentially-distributed grinding processing devices to form a four-station integrated layout of rough grinding, precision grinding, polishing and on-line monitoring; the rotary table is driven by a cam divider to realize 90-degree accurate intermittent indexing; the workpiece can be clamped once to complete the whole-process processing, and the cumulative positioning error caused by multiple clamping can be completely avoided.

Description

Technical Field

[0001] This application relates to the field of scroll plate processing equipment technology, and in particular to a precision grinding and polishing machine for the end face of a scroll plate. Background Technology

[0002] The scroll plate is a core moving component of scroll compressors, scroll vacuum pumps, scroll expanders, and other scroll fluid machinery. The flatness, surface roughness, and parallelism of its end faces are key indicators determining the overall sealing performance, volumetric efficiency, operating noise, and service life of the machine. With technological upgrades in fields such as new energy refrigeration, industrial vacuum, and gas transportation, the industry's requirements for the machining precision of scroll plate end faces are constantly increasing. Typically, the flatness of the end face is required to be controlled within 1μm, and the surface roughness to reach Ra 0.05μm or less. This places extremely high demands on the machining precision, stability, and batch consistency of grinding and polishing equipment.

[0003] In existing technologies, the grinding and polishing of the end face of a scroll gear mostly employs general-purpose flat grinding equipment, which has several technical drawbacks: First, it is mostly a single-station processing mode, requiring the rough grinding, fine grinding, and polishing processes to be transferred between different machines or to be clamped and switched multiple times on the same machine. This not only results in low processing efficiency but also generates cumulative positioning errors from multiple clamping operations, making it difficult to guarantee the consistency of accuracy in batch processing. Second, workpiece clamping generally adopts an outer-circle rigid clamping structure, and the centering accuracy relies on manual adjustment. This easily leads to problems such as excessive perpendicularity between the end face and the workpiece base circle. At the same time, rigid clamping can easily cause local deformation of the workpiece's outer circle, thus affecting the scroll gear. Firstly, the workpiece surface is easily scratched during clamping due to poor form and position accuracy. Secondly, the grinding head often uses a rigid connection structure, which cannot adapt to the slight form and position deviations of the workpiece end face. The grinding pressure distribution is uneven, and the edge area of ​​the workpiece is prone to over-polishing and edge collapse. Moreover, there is a lack of real-time pressure detection means that the machining allowance and surface accuracy cannot be accurately controlled. Thirdly, the grinding fluid supply often adopts a flooding method, which means that the abrasive cannot be accurately applied to the grinding contact area. The abrasive utilization rate is low, and the waste liquid recovery structure is simple. The grinding fluid and abrasive particles cannot be effectively recycled, resulting in high processing costs. Furthermore, the waste liquid is prone to splashing and seeping into the moving parts of the equipment, affecting the service life of the equipment.

[0004] Therefore, developing a vortex disk end face precision grinding and polishing machine that can achieve multi-station continuous processing, high-precision centering and clamping, floating pressure controllable grinding, directional supply and recycling of grinding fluid, and online quality monitoring is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a precision grinding and polishing machine for the end face of a scroll disk, which has advantages such as multi-station continuous processing and high-precision centering and clamping, thus solving the problems mentioned above.

[0006] This application provides a precision grinding and polishing machine for the end face of a scroll disk, which adopts the following technical solution:

[0007] A precision grinding and polishing machine for the end face of a scroll plate includes a worktable, a support top plate disposed on the top of the worktable, and a multi-station indexing turntable disposed inside the worktable. Four grinding processing devices are disposed circumferentially between the multi-station indexing turntable and the support top plate. Four workpiece centering and clamping mechanisms are also disposed on the top surface of the multi-station indexing turntable corresponding to the four grinding processing devices.

[0008] The grinding processing device is used to grind the end face of the scroll disk body. The four grinding processing devices correspond to the rough grinding station, fine grinding station, polishing station and online monitoring station, respectively. The workpiece centering and clamping mechanism is used to center and clamp the scroll disk body.

[0009] The grinding processing device includes a grinding execution head, a connecting plate, a drive housing, and a pressure sensor. The grinding execution head, the connecting plate, and the drive housing are arranged sequentially from bottom to top. The connecting plate is rotatably connected to the lower part of the drive housing. The pressure sensor is installed on the top surface of the grinding execution head. Four floating support structures are provided between the grinding execution head and the connecting plate.

[0010] The workpiece centering and clamping mechanism includes a workpiece clamping platform, a fixed plate, a central drive disk, four moving blocks, four hinge rods, four clamping blocks, and a rotary cylinder. The fixed plate and the rotary cylinder are both fixedly connected inside the workpiece clamping platform. The central drive disk is rotatably connected to the top surface of the fixed plate. The hinge rods are hinged between the moving blocks and the central drive disk. The rotary cylinder is used to drive the central drive disk to rotate. The four moving blocks correspond to the four clamping blocks respectively. The inner sides of the four clamping blocks are all in contact with the outer wall of the scroll disk body.

[0011] Optionally, three of the grinding execution heads are respectively a coarse grinding execution head, a fine grinding execution head, and a polishing execution head, and the other grinding execution head is an online monitoring device. The coarse grinding execution head, the fine grinding execution head, and the polishing execution head are respectively a cast iron bonded diamond grinding disc, a resin bonded diamond grinding disc, and a polyurethane polishing disc. The top of the supporting top plate is fixedly connected to four lifting cylinders extending to its bottom. The drive housing is installed on the output end of the lifting cylinders, and the drive housing has a built-in drive motor that can drive the connecting plate to rotate.

[0012] Optionally, the floating support structure includes a fixed sleeve, a telescopic rod, and a return spring. The fixed sleeve is installed at the bottom of the connecting plate, the telescopic rod is sleeved inside the fixed sleeve, and the return spring is fixedly connected between the fixed sleeve and the telescopic rod.

[0013] Optionally, all four clamping blocks are slidably connected to the top surface of the workpiece clamping table, and the four clamping blocks are respectively fixedly connected to four moving blocks. The top surface of the workpiece clamping table is provided with positioning grooves for limiting the clamping blocks, and rubber pads are adhered to the inner side of each of the four clamping blocks.

[0014] Optionally, a cam divider is installed inside the worktable. The cam divider is used to drive the multi-station indexing turntable to rotate intermittently, and the output end of the cam divider rotates by 90° each time. A flexible sealing skirt extending to the bottom is fixedly connected to the outer peripheral wall of the multi-station indexing turntable.

[0015] Optionally, the outer side of the workbench is provided with a directional liquid supply module capable of supplying liquid to the coarse grinding station, fine grinding station and polishing station respectively. A fixed platform is fixedly connected inside the workbench. The upper surface of the fixed platform and the inner wall of the workbench form a recessed cavity. The multi-station indexing turntable is rotatably connected to the top surface of the fixed platform.

[0016] Optionally, the directional liquid supply module includes a fixed housing, an abrasive liquid storage tank, a precision metering pump, a distributor, a liquid delivery pipe, and three fan-shaped nozzles. The abrasive liquid storage tank and the precision metering pump are both installed inside the fixed housing. The input end of the precision metering pump is connected to the drain end of the abrasive liquid storage tank. The distributor is installed on the top surface of the fixed housing. The liquid delivery pipe connects the distributor to the precision metering pump. The three branch ports of the distributor are respectively connected to the three fan-shaped nozzles. The spray direction of the fan-shaped nozzles forms an angle of 15°-30° with the rotational linear velocity direction of the corresponding actuator head. The nozzle outlet is directly opposite the contact arc area between the actuator head and the workpiece end face.

[0017] Optionally, the directional liquid supply module further includes two liquid collection hoppers, two liquid collection pipes, and a return liquid main pipe. The two liquid collection hoppers are installed on the bottom surface of the fixed platform. An interception grid connected to the two liquid collection hoppers is installed inside the fixed platform. The two liquid collection pipes are used to connect the liquid outlets of the two liquid collection hoppers to the return liquid main pipe. The liquid outlet of the return liquid main pipe is connected to the top of the abrasive storage tank.

[0018] Optionally, the abrasive storage tank is internally fixedly connected to a vertically arranged partition, and a filter plate is installed between the partition and the inner wall of the abrasive storage tank. The filter plate is used to filter and recycle the used polishing liquid. A nozzle seat is fixedly connected to the outside of the drive housing, and the fan-shaped nozzle is installed on the nozzle seat. A protective shell plate is installed on the outside of the fixed housing.

[0019] Optionally, support columns are provided on both the left and right sides of the workbench. A lifting column extending to the top of the support column is slidably connected inside the support column. The top of the lifting column is fixedly connected to the support top plate, so that the support top plate and the two lifting columns form a gantry structure. A hydraulic cylinder capable of driving the lifting column to move up and down is installed inside the support column.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. This vortex disc end face precision grinding and polishing machine adopts a multi-station indexing turntable with four circumferentially distributed grinding processing devices to form an integrated layout of four stations: rough grinding, fine grinding, polishing, and online monitoring. The turntable is driven by a cam divider to achieve 90° precise intermittent indexing. The workpiece can be clamped once to complete the entire process, completely avoiding the cumulative positioning error caused by multiple clamping. While greatly improving the processing efficiency, it ensures the positioning accuracy between each process and the consistency of batch processing.

[0022] 2. This precision grinding and polishing machine for the end face of the scroll plate uses a workpiece centering and clamping mechanism with a linkage structure of a central drive plate, hinge rod, moving block and clamping block. The four clamping blocks are synchronously radially clamped along the positioning groove by rotating the central drive plate through a rotary cylinder. It has high centering accuracy and fast clamping efficiency. The inner side of the clamping block is equipped with a rubber pad, which can increase friction to ensure clamping stability and buffer the clamping force to avoid deformation of the outer circle of the workpiece and surface damage caused by rigid clamping, effectively ensuring the shape and position accuracy of the scroll plate.

[0023] 3. This vortex disc end face precision grinding and polishing machine features a grinding execution head that is flexibly connected to the connecting plate via four sets of floating support structures (fixed sleeve, telescopic rod, and return spring). This allows for axial floating and adaptive fitting to the workpiece end face, automatically compensating for minor dimensional and positional deviations and ensuring uniform grinding pressure distribution. This fundamentally prevents over-polishing and edge collapse of the workpiece. Furthermore, a pressure sensor at the top of the grinding execution head collects pressure data in real time, and combined with a lifting cylinder, achieves closed-loop control of the grinding pressure. This allows for precise control of the machining allowance, significantly improving the flatness and surface quality of the end face.

[0024] 4. This vortex disc end face precision grinding and polishing machine uses a fan-shaped nozzle with a directional liquid supply module to spray abrasive at a 15°-30° angle along the rotational linear velocity direction of the actuator head onto the grinding contact arc area. This ensures precise application of abrasive to the processing area, significantly improving abrasive utilization. A recycling loop consisting of a liquid collection hopper, collection pipe, and return main pipe, combined with a multi-stage filtration structure formed by baffles and filter plates inside the abrasive storage tank, achieves filtration, purification, and recycling of the grinding fluid, reducing processing consumable costs. Simultaneously, the recessed cavity formed by the fixed platform and worktable, and the flexible sealing skirt around the turntable effectively prevent waste liquid splashing, protecting internal moving parts. The protective shell plate on the outer side of the fixed outer casing further protects the liquid supply components, enhancing equipment operational reliability. Attached Figure Description

[0025] Figure 1 This is a three-dimensional view of the overall structure of this application;

[0026] Figure 2 This is a schematic diagram of the grinding processing apparatus of this application;

[0027] Figure 3 This is a schematic diagram of the floating support structure of this application;

[0028] Figure 4 This is a schematic diagram of the cam divider of this application;

[0029] Figure 5 This is a schematic diagram of the workpiece centering and clamping mechanism of this application;

[0030] Figure 6 This is a schematic diagram of the directional liquid supply module of this application;

[0031] Figure 7 This is a schematic diagram of the liquid collection hopper in this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Worktable; 2. Scroll plate body; 3. Support top plate; 4. Multi-station indexing turntable; 5. Grinding processing device; 51. Lifting cylinder; 52. Grinding execution head; 53. Connecting plate; 54. Drive housing; 55. Pressure sensor; 56. Fixed sleeve; 57. Telescopic rod; 58. Return spring; 6. Workpiece centering and clamping mechanism; 61. Workpiece clamping table; 62. Fixed plate; 63. Central drive disk; 64. Moving block; 65. Hinge rod; 66. Clamping block; 67. Rotary cylinder; 68. Fixed... 7. Slot; 8. Cam divider; 9. Flexible sealing skirt; 10. Support column; 11. Lifting column; 12. Hydraulic cylinder; 13. Directional liquid supply module; 14. Fixed outer shell; 15. Abrasive storage tank; 16. Liquid collection hopper; 17. Liquid collection pipe; 18. Main return liquid pipe; 19. Precision metering pump; 10. Diverter; 10. Liquid delivery pipe; 11. Fan-shaped nozzle; 12. Fixed platform; 13. Interception grid; 14. Partition plate; 15. Filter plate; 16. Nozzle holder; 17. Protective shell plate. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1 to 3 This embodiment of a precision grinding and polishing machine for the end face of a scroll disk includes a worktable 1, a supporting top plate 3 disposed on the top of the worktable 1, and a multi-station indexing turntable 4 disposed inside the worktable 1. The worktable 1 serves as the load-bearing base of the entire machine, providing a stable support foundation for the installation and operation of various components. Four grinding processing devices 5 are evenly distributed circumferentially between the multi-station indexing turntable 4 and the supporting top plate 3. Four workpiece centering and clamping mechanisms 6 are also disposed on the top surface of the multi-station indexing turntable 4 corresponding to the four grinding processing devices 5, achieving a one-to-one correspondence between the workstations and the processing mechanisms. The grinding processing devices 5 are used to perform high-precision grinding and polishing processing on the end face of the scroll disk body 2. The four grinding processing devices 5 correspond sequentially to the rough grinding station, fine grinding station, polishing station, and online monitoring station, enabling the completion of the entire process of precision machining and quality inspection of the end face of the scroll disk body 2 in one operation. The workpiece centering and clamping mechanism 6 is used to accurately center and stably clamp the scroll plate body 2, effectively avoiding workpiece offset and loosening during processing and ensuring processing accuracy.

[0036] The grinding processing device 5 includes a grinding execution head 52, a connecting plate 53, a drive housing 54, and a pressure sensor 55. The grinding execution head 52, connecting plate 53, and drive housing 54 are coaxially distributed from bottom to top, forming a compact overall structure with stable transmission. The connecting plate 53 is rotatably connected to the lower part of the drive housing 54 and can rotate independently relative to the drive housing 54, driving the bottom grinding execution head 52 to complete the rotary grinding action. The pressure sensor 55 is fixedly installed on the top surface of the grinding execution head 52 and can collect axial clamping pressure data in real time and accurately during the grinding process, providing data support for precise pressure control. Four floating support structures arranged in a rectangular array are provided between the grinding execution head 52 and the connecting plate 53, giving the grinding execution head 52 axial adaptive floating capability, which can conform to the small shape and position errors of the end face of the scroll plate body 2, ensuring uniform grinding force.

[0037] Specifically, the three grinding execution heads 52 are respectively a rough grinding execution head, a fine grinding execution head, and a polishing execution head, adapted to the precision requirements of different processing steps. The other grinding execution head 52 is an online monitoring device used to complete online detection of parameters such as the flatness and roughness of the finished surface. Among them, the rough grinding execution head uses a cast iron bonded diamond grinding disc, which has high hardness and large grinding volume, and can quickly remove the excess material on the end face of the scroll plate and correct the basic shape and position errors of the end face; the fine grinding execution head uses a resin bonded diamond grinding disc, which has fine abrasive grains and high grinding precision, and can complete the fine finishing of the end face and reduce the surface roughness; the polishing execution head uses a polyurethane polishing disc, which is soft and has good conformability, and can achieve ultra-fine polishing of the end face and improve the surface finish of the workpiece. The top of the supporting top plate 3 is fixedly connected to four lifting cylinders 51 extending to its bottom. The drive housing 54 is fixedly installed on the output end of the lifting cylinders 51. The extension and retraction of the lifting cylinders 51 can drive the entire grinding processing device 5 to move vertically up and down, realizing processing feed and reset avoidance. Furthermore, the drive housing 54 has a built-in drive motor that can drive the connecting plate 53 to rotate, providing a stable power source for the rotary processing of the grinding execution head 52.

[0038] It should be noted that the floating support structure includes a fixed sleeve 56, a telescopic rod 57, and a return spring 58. The fixed sleeve 56 is fixedly installed at the bottom of the connecting plate 53. The telescopic rod 57 is vertically slidably sleeved inside the fixed sleeve 56 and can slide and extend along the axial direction of the fixed sleeve 56. The return spring 58 is fixedly connected between the inner wall of the top of the fixed sleeve 56 and the end face of the top of the telescopic rod 57. Under normal conditions, the extension and return of the telescopic rod 57 is achieved by the elastic force of the return spring 58. During processing, it can adaptively compress and extend according to the flatness of the workpiece end face, achieving flexible fitting grinding and completely avoiding defects such as uneven end face force, edge collapse, and local over-grinding caused by rigid grinding.

[0039] Please see Figure 1 , Figure 4 and Figure 5In this embodiment, the workpiece centering and clamping mechanism 6 includes a workpiece clamping table 61, a fixed plate 62, a central drive disk 63, four moving blocks 64, four hinge rods 65, four clamping blocks 66, and a rotary cylinder 67. The fixed plate 62 and the rotary cylinder 67 are both fixedly connected inside the workpiece clamping table 61, resulting in a concealed structure that is less susceptible to interference from processing dust and waste liquid, and exhibits strong operational stability. The central drive disk 63 is horizontally rotatably connected to the top surface of the fixed plate 62, allowing for smooth rotation. The hinge rods 65 are hinged between the moving blocks 64 and the central drive disk 63, forming a four-bar synchronous transmission structure. The rotary cylinder 67 serves as a power source to drive the central drive disk 63 to rotate forward or backward. The four moving blocks 64 correspond one-to-one with the four clamping blocks 66, achieving linkage transmission. The inner clamping surfaces of the four clamping blocks 66 precisely fit against the outer wall of the scroll plate body 2, achieving annular centering and clamping of the scroll plate body 2.

[0040] Specifically, four clamping blocks 66 are horizontally slidably connected to the top surface of the workpiece clamping table 61, ensuring smooth and seamless sliding. Each of the four clamping blocks 66 is fixedly connected to one of the four moving blocks 64, guaranteeing synchronous transmission. A positioning groove 68 is provided on the top surface of the workpiece clamping table 61 to radially limit the movement of the clamping blocks 66, ensuring that the four clamping blocks 66 always open and close synchronously in the radial direction, resulting in higher centering accuracy. Furthermore, anti-slip buffer rubber pads are adhered to the inner clamping surfaces of the four clamping blocks 66, increasing friction with the outer wall of the scroll plate, improving clamping stability, and preventing deformation and scratches on the workpiece outer wall caused by rigid clamping and squeezing, effectively protecting the workpiece forming accuracy.

[0041] It should be noted that a cam divider 7 is installed inside the worktable 1. The cam divider 7 is used to drive the multi-station indexing rotary table 4 to perform intermittent and precise rotation, realizing automatic switching of workstations. Furthermore, the output end of the cam divider 7 rotates at a fixed angle of 90° each time, precisely matching the four-station layout. After each rotation, each grinding and processing device 5 is precisely aligned without any alignment deviation. A flexible sealing skirt 8 extending to the bottom of the multi-station indexing rotary table 4 is fixedly connected to its outer peripheral wall. The bottom surface of the flexible sealing skirt 8 is in close contact with the top surface of the fixed table 13, effectively preventing grinding waste liquid and abrasive dust from entering the rotation gap of the rotary table, avoiding impurities from jamming rotating parts, and preventing waste liquid leakage, thus improving the equipment's sealing performance and service life.

[0042] Please see Figure 1 , Figure 6 and Figure 7In this embodiment, a directional liquid supply module 12 is provided on the outer side of the workbench 1, capable of independently and precisely supplying liquid to the rough grinding station, fine grinding station, and polishing station, providing suitable grinding and polishing media for each grinding and polishing process. A fixed platform 13 is fixedly connected inside the workbench 1. The upper surface of the fixed platform 13 and the inner wall of the workbench 1 form a sunken liquid collection cavity, facilitating the unified collection of processing waste liquid and preventing waste liquid splashing and accumulation. The multi-station indexing turntable 4 is rotatably connected to the top surface of the fixed platform 13, providing stable and reliable rotational support.

[0043] The directional liquid supply module 12 includes a fixed housing 121, an abrasive liquid storage tank 122, a precision metering pump 126, a distributor 127, a liquid delivery pipe 128, and three fan-shaped nozzles 129. The abrasive liquid storage tank 122 and the precision metering pump 126 are both embedded inside the fixed housing 121, forming a neat structure with protective features. The input end of the precision metering pump 126 is precisely connected to the drain end of the abrasive liquid storage tank 122, allowing for the quantitative extraction of grinding and polishing liquid from the tank. The distributor 127 is fixedly installed on the top surface of the fixed housing 121, and the liquid delivery pipe 128 connects the distributor 127 to the output end of the precision metering pump 126, achieving stable medium delivery. The three branch ports of the distributor 127 are respectively connected to the three fan-shaped nozzles 129, matching the roughing, fine, and polishing stations. The angle between the spray direction of the fan-shaped nozzle 129 and the rotational linear velocity direction of the corresponding grinding execution head 52 is set to 15°-30°. The nozzle outlet is precisely aligned with the contact arc area between the execution head and the end face of the vortex disk, so that the abrasive medium is precisely applied to the core processing area, greatly improving the medium utilization rate and processing uniformity.

[0044] Specifically, the directional liquid supply module 12 also includes two liquid collection hoppers 123, two liquid collection pipes 124, and a return liquid main pipe 125. The two liquid collection hoppers 123 are symmetrically installed on the bottom surface of the fixed platform 13, which can comprehensively collect the waste processing fluid in the sinking cavity. The fixed platform 13 is equipped with an interception grid 14 that communicates with the two liquid collection hoppers 123, which can initially intercept large particles of grinding debris and impurities in the waste liquid to avoid pipe blockage. The two liquid collection pipes 124 are used to stably connect the liquid outlets of the two liquid collection hoppers 123 and the return liquid main pipe 125. The liquid outlet of the return liquid main pipe 125 is connected to the top of the abrasive storage tank 122 to realize the return collection of waste liquid, forming a closed-loop liquid supply and recovery system.

[0045] It should be noted that a vertically arranged partition 15 is fixedly connected inside the abrasive storage tank 122, dividing the interior of the tank into a storage area and a return filtration area. A filter plate 16 is fixedly installed between the partition 15 and the inner wall of the abrasive storage tank 122. The filter plate 16 can finely filter the returned waste polishing fluid and grinding fluid, removing internal grinding debris and impurities. The filtered clean medium can be reused in processing, realizing the recycling of the medium and reducing processing costs. A nozzle seat 17 is fixedly connected to the outside of the drive housing 54. The fan-shaped nozzle 129 is detachably installed on the nozzle seat 17, which is stable and easy to disassemble, maintain, and finely adjust the angle. A protective shell plate 18 is installed on the outside of the fixed outer shell 121 to protect the internal pump body, pipelines, and tank structure, preventing dust and external force collisions from damaging equipment components.

[0046] Please see Figure 1 and Figure 6 In this embodiment, support columns 9 are provided on both the left and right sides of the workbench 1. Lifting columns 10 extending to their tops are slidably connected inside the support columns 9. The tops of the lifting columns 10 are fixedly connected to the support top plate 3, so that the support top plate 3, the two lifting columns 10, and the two sets of support columns 9 together form a gantry support structure. The entire machine has strong support rigidity and is not easily deformed during operation, ensuring the stability of precision machining. Hydraulic cylinders 11 are installed inside the support columns 9 to drive the lifting columns 10 to move up and down. These cylinders, in conjunction with the lifting cylinder 51, can finely adjust the overall height of the support top plate 3 to meet the processing requirements of scroll plates of different thicknesses and specifications.

[0047] Specifically, the left support column 9 is fixedly connected to the top of the fixed housing 121, realizing the integrated assembly of the liquid supply module and the support structure, which is compact and reasonably laid out; the right support column 9 is fixedly connected to the workbench 1, and the forces on both sides are balanced, further improving the overall structural stability of the machine.

[0048] The working principle of the above embodiments is as follows:

[0049] When this equipment is in operation, it first starts up to complete the machine self-inspection. Then, the scroll plate body 2 to be processed is placed on the clamping station of the workpiece clamping table 61. The central drive plate 63 is driven to rotate by the rotary cylinder 67. The central drive plate 63 pulls four sets of moving blocks 64 radially along the positioning groove 68 through the hinge rod 65, which drives the four clamping blocks 66 to clamp the outer wall of the scroll plate body 2 in a synchronous manner, completing the high-precision centering clamping. After the clamping is completed, the equipment enters the processing state.

[0050] Subsequently, the cam divider 7 is activated, driving the multi-station indexing turntable 4 to rotate precisely 90° each time, achieving automatic station switching. The clamped scroll plate body 2 is sequentially transported to the rough grinding station, fine grinding station, polishing station, and online monitoring station. During processing, the gantry structure, in conjunction with the hydraulic cylinder 11, completes the overall height adaptation adjustment. The lifting cylinder 51 corresponding to each station drives the grinding processing device 5 to descend vertically, causing the grinding execution head 52 to fit against the end face of the scroll plate body 2. The drive motor inside the drive housing 54 drives the connecting plate 53 and the bottom grinding execution head 52 to rotate at high speed. Simultaneously, the pressure sensor 55 monitors the grinding pressure in real time, and the return spring 58 of the floating support structure achieves flexible adaptive grinding, ensuring uniform force on the end face.

[0051] Simultaneously, the directional liquid supply module 12 starts working, and the precision metering pump 126 quantitatively draws the grinding or polishing liquid from the abrasive storage tank 122. After being diverted by the distributor 127, it is precisely sprayed to the grinding contact area of ​​each workstation through three sets of fan-shaped nozzles 129, providing a stable abrasive medium for the rough grinding, fine grinding, and polishing processes. The waste liquid and grinding debris generated during processing fall into the sunken cavity enclosed by the fixed table 13 and the worktable 1. After preliminary filtration by the interception grid 14, it flows back to the abrasive storage tank 122 through the liquid collection hopper 123, the liquid collection pipe 124, and the return liquid main pipe 125. Then, it is finely filtered by the internal filter plate 16 and recycled for reuse, realizing the closed-loop utilization of the medium.

[0052] After single-station processing is completed, the lifting cylinder 51 drives the grinding device 5 to rise and reset. The cam divider 7 then drives the turntable to index and switch stations, sequentially completing the entire process of rough grinding to remove excess material, fine grinding to correct accuracy, and polishing to improve surface finish. Finally, the workpiece is transferred to the online monitoring station, where the online monitoring device performs real-time detection of key parameters such as the flatness and roughness of the finished scroll plate end face to determine if the product processing is qualified. After all processes are completed, the rotary cylinder 67 drives the central drive plate 63 to rotate in the reverse direction, causing the clamping block 66 to release the workpiece. The operator can then remove the finished workpiece, completing a single processing cycle. The equipment can operate continuously and repeatedly, achieving high-precision batch processing.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision grinding and polishing machine for the end face of a scroll plate, comprising a worktable (1), a support top plate (3) disposed on the top of the worktable (1), and a multi-station indexing rotary table (4) disposed inside the worktable (1), characterized in that: Four grinding processing devices (5) are arranged circumferentially between the multi-station indexing turntable (4) and the supporting top plate (3). Four workpiece centering clamping mechanisms (6) are also arranged on the top surface of the multi-station indexing turntable (4) corresponding to the four grinding processing devices (5). The grinding processing device (5) is used to grind the end face of the scroll plate body (2). The four grinding processing devices (5) correspond to the rough grinding station, fine grinding station, polishing station and online monitoring station respectively. The workpiece centering and clamping mechanism (6) is used to center and clamp the scroll plate body (2). The grinding processing device (5) includes a grinding execution head (52), a connecting plate (53), a drive housing (54), and a pressure sensor (55). The grinding execution head (52), the connecting plate (53), and the drive housing (54) are distributed from bottom to top. The connecting plate (53) is rotatably connected to the bottom of the drive housing (54). The pressure sensor (55) is installed on the top surface of the grinding execution head (52). Four floating support structures are provided between the grinding execution head (52) and the connecting plate (53). The workpiece centering and clamping mechanism (6) includes a workpiece clamping table (61), a fixed plate (62), a central drive disk (63), four moving blocks (64), four hinge rods (65), four clamping blocks (66), and a rotary cylinder (67). The fixed plate (62) and the rotary cylinder (67) are both fixedly connected to the inside of the workpiece clamping table (61). The central drive disk (63) is rotatably connected to the top surface of the fixed plate (62). The hinge rods (65) are hinged between the moving blocks (64) and the central drive disk (63). The rotary cylinder (67) is used to drive the central drive disk (63) to rotate. The four moving blocks (64) correspond to the four clamping blocks (66) respectively. The inner sides of the four clamping blocks (66) are all in contact with the outer wall of the scroll plate body (2).

2. The precision grinding and polishing machine for the end face of a scroll disk according to claim 1, characterized in that: Three of the grinding execution heads (52) are respectively a coarse grinding execution head, a fine grinding execution head and a polishing execution head, and the other grinding execution head (52) is an online monitoring device. The coarse grinding execution head, the fine grinding execution head and the polishing execution head are respectively a cast iron bonded diamond grinding disc, a resin bonded diamond grinding disc and a polyurethane polishing disc. The top of the supporting top plate (3) is fixedly connected to four lifting cylinders (51) extending to its bottom. The drive housing (54) is installed on the output end of the lifting cylinders (51), and the drive housing (54) has a built-in drive motor that can drive the connecting plate (53) to rotate.

3. The precision grinding and polishing machine for the end face of a scroll disk according to claim 1, characterized in that: The floating support structure includes a fixed sleeve (56), a telescopic rod (57), and a return spring (58). The fixed sleeve (56) is installed at the bottom of the connecting plate (53), the telescopic rod (57) is sleeved inside the fixed sleeve (56), and the return spring (58) is fixedly connected between the fixed sleeve (56) and the telescopic rod (57).

4. The precision grinding and polishing machine for the end face of a scroll disk according to claim 1, characterized in that: The four clamping blocks (66) are slidably connected to the top surface of the workpiece clamping table (61). The four clamping blocks (66) are fixedly connected to the four moving blocks (64). The top surface of the workpiece clamping table (61) is provided with positioning grooves (68) for limiting the clamping blocks (66), and rubber pads are glued to the inner side of the four clamping blocks (66).

5. The precision grinding and polishing machine for the end face of a scroll disk according to claim 1, characterized in that: The worktable (1) is internally equipped with a cam divider (7), which is used to drive the multi-station indexing turntable (4) to rotate intermittently. The output end of the cam divider (7) rotates 90° each time. A flexible sealing skirt (8) extending to the bottom of the multi-station indexing turntable (4) is fixedly connected to the outer peripheral wall of the multi-station indexing turntable (4).

6. The precision grinding and polishing machine for the end face of a scroll disk according to claim 1, characterized in that: The outer side of the workbench (1) is provided with a directional liquid supply module (12) that can supply liquid to the coarse grinding station, fine grinding station and polishing station respectively. The workbench (1) is fixedly connected to a fixed platform (13). The upper surface of the fixed platform (13) surrounds the inner wall of the workbench (1) to form a sunken cavity. The multi-station indexing turntable (4) is rotatably connected to the top surface of the fixed platform (13).

7. A precision grinding and polishing machine for the end face of a scroll disk according to claim 6, characterized in that: The directional liquid supply module (12) includes a fixed housing (121), an abrasive liquid storage tank (122), a precision metering pump (126), a distributor (127), a liquid delivery pipe (128), and three fan-shaped nozzles (129). The abrasive liquid storage tank (122) and the precision metering pump (126) are both installed inside the fixed housing (121). The input end of the precision metering pump (126) is connected to the drain end of the abrasive liquid storage tank (122). The distributor (127) is installed on the top surface of the fixed housing (121). The liquid delivery pipe (128) connects the distributor (127) to the precision metering pump (126). The three branch ports of the distributor (127) are respectively connected to three fan-shaped nozzles (129). The spraying direction of the fan-shaped nozzle (129) is at an angle of 15°-30° with the rotational linear velocity direction of the corresponding actuator head. The nozzle outlet is directly opposite the contact arc area between the actuator head and the end face of the workpiece.

8. A precision grinding and polishing machine for the end face of a scroll disk according to claim 7, characterized in that: The directional liquid supply module (12) also includes two liquid collection hoppers (123), two liquid collection pipes (124), and a return liquid main pipe (125). The two liquid collection hoppers (123) are installed on the bottom surface of the fixed platform (13). The fixed platform (13) is equipped with an interception grid (14) that communicates with the two liquid collection hoppers (123). The two liquid collection pipes (124) are used to connect the liquid outlet of the two liquid collection hoppers (123) and the return liquid main pipe (125). The liquid outlet of the return liquid main pipe (125) is connected to the top of the abrasive storage tank (122).

9. A precision grinding and polishing machine for the end face of a scroll disk according to claim 7, characterized in that: The abrasive storage tank (122) is internally fixedly connected to a vertically arranged partition (15). A filter plate (16) is installed between the partition (15) and the inner wall of the abrasive storage tank (122). The filter plate (16) is used to filter and recycle the polishing liquid after use. A nozzle seat (17) is fixedly connected to the outside of the drive housing (54). The fan-shaped nozzle (129) is installed on the nozzle seat (17). A protective shell plate (18) is installed on the outside of the fixed outer shell (121).

10. A precision grinding and polishing machine for the end face of a scroll disk according to claim 1, characterized in that: Support columns (9) are provided on both the left and right sides of the workbench (1). A lifting column (10) extending to the top of the support column (9) is slidably connected inside the support column (9). The top of the lifting column (10) is fixedly connected to the support top plate (3), so that the support top plate (3) and the two lifting columns (10) form a gantry structure. A hydraulic cylinder (11) capable of driving the lifting column (10) to move up and down is installed inside the support column (9).

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