Method for machining integrally-closed impeller through cooperation of planing table type boring machine and vertical rotating table

Abstract

The invention relates to the field of machining, in particular to a method for machining an integrally closed impeller through cooperation of a planing table type boring machine and a vertical rotating table. According to the method, machining is achieved through cooperation of a planing table type boring machine and a vertical rotating table; a vertical rotating table (2) is additionally arranged on a rotating table (5) of the planing table type boring machine; the vertical rotating table relatively fixes the bottom of a workpiece (4) to be machined through a connecting structure (3); the workpiece to be machined is a blank of the integral closed impeller; the rotary worktable (2) is a vertical worktable; a rotating motor of the rotating table (2) rotates to drive a to-be-machined workpiece (4) to rotate for machining; the planing table type boring machine is matched with the integrated high-precision vertical rotating table to form a new linkage machining system, the machining state in the runner is clearly visible at the horizontal machining view angle, and real-time monitoring is facilitated; and cuttings are convenient to discharge. A boring rod of the spindle power system (1) is slender and telescopic, and interference in the machining process is small.

Description

Technical Field

[0001] This invention relates to the field of machining, and more particularly to a method for machining an integral closed impeller using a planer-type boring machine and a vertical rotary table. Background Technology

[0002] Large closed impellers, as high-performance core components, are widely used in critical equipment subjected to extreme conditions such as high pressure, high speed, and strong corrosion, covering multiple core industrial sectors. In the petrochemical industry, they are mainly used in compressor impellers of catalytic cracking units and circulating compressor rotor impellers for hydrogenation reactors. These devices need to operate for extended periods in high-temperature, high-pressure, and corrosive media, requiring extremely high fatigue resistance and material stability from the impellers. In the air energy storage industry, a typical application is as the core rotor impeller of large air expanders and compressors, requiring excellent aerodynamic performance and structural strength to adapt to frequent start-stop and high-load operation. Furthermore, in other high-end industrial scenarios such as heavy-duty gas turbine compressors and compressors for deep-sea oil and gas extraction platforms, impellers must meet even more stringent standards for corrosion resistance, fatigue resistance, and overall reliability.

[0003] Large, integral, closed impellers offer numerous significant advantages, particularly in performance and structure. They are typically made from a single block of high-strength alloys such as high-temperature alloys and titanium alloys, machined as a single piece using a five-axis CNC machine tool. With no connecting interfaces, their fatigue strength far exceeds that of traditional welded impellers, and raw material utilization is increased by approximately 30%, fundamentally avoiding stress concentration and potential cracking risks associated with welded joints. Furthermore, they offer simplified manufacturing processes, eliminating complex steps such as alignment, assembly welding, and post-weld processing found in multi-body welding. This solves problems like poor weld accessibility and difficulty in controlling weld quality due to narrow flow channels, while also reducing reliance on highly skilled welders and specialized welding qualifications, significantly improving production consistency and efficiency. They also offer environmental and quality advantages, with no welding fumes or harmful gas emissions throughout the manufacturing process, improving the working environment and reducing health hazards to operators. Additionally, they eliminate the need for post-weld heat treatment and X-ray inspection, reducing rework rates and quality risks caused by welding defects and enhancing overall product reliability.

[0004] However, large integral closed impellers face several technical challenges in machining. The primary challenge is the space and tool rigidity problem. Their flow channel structure often has a width-to-depth ratio exceeding 1:5, resulting in extremely limited space. Machining requires slender tools with a large length-to-diameter ratio, which can easily lead to insufficient tool rigidity, tool deflection, and vibration, severely affecting blade accuracy and surface quality. Secondly, there are programming and machining path planning challenges. Impeller blades are mostly complex three-dimensional free-form surfaces with high blade twist and small blade spacing, resulting in a high risk of interference between adjacent blades. High-precision five-axis CNC programming using professional CAM systems such as UG and HyperMILL is necessary to ensure a reasonable and safe tool path. Thirdly, there are challenges in chip removal and heat dissipation control. The narrow flow channel makes it difficult for chips to be discharged smoothly, easily causing accumulation and secondary cutting. Furthermore, the poor heat dissipation conditions in the machining area, with local temperatures often reaching 300–500°C, can easily lead to premature tool wear, burning, and workpiece thermal deformation, placing extremely high demands on the selection of cooling media and the optimization of cutting parameters.

[0005] Currently, there are three main types of equipment used for machining closed impellers: five-axis EDM, cradle-type five-axis machining centers, and vertical-horizontal convertible five-axis machining centers. Different equipment has different maximum machining diameters to suit the machining needs of closed impellers of different specifications. Among them, the maximum machining diameter of five-axis EDM is ≤500mm, the cradle-type five-axis machining center can machine closed impellers with a maximum diameter ≤1000mm, and the vertical-horizontal convertible five-axis machining center has a wider machining range, covering closed impellers with a maximum diameter ≤1100mm.

[0006] While various closed-loop impeller machining equipment can meet basic machining needs, they all have significant shortcomings. The core issues with five-axis EDM (Electrical Discharge Machining) lie in machining efficiency and cost (it's only suitable for impellers with a diameter less than 600mm), with a single-piece machining cycle of 20-30 days or longer, and high costs—3-5 times that of conventional cutting—making it unsuitable for high-volume, low-cost machining scenarios. Cradle-type five-axis machining centers suffer from drawbacks related to machining operation and equipment rigidity. Not only is the machining process poorly visible and chip removal difficult, but under heavy-load machining conditions, insufficient table rigidity can easily cause vibration problems, affecting machining stability.

[0007] The core flaw of the vertical-horizontal convertible five-axis machining center lies in the contradiction between its structural design and machining accuracy and efficiency. The spindle head of this equipment is too large, with a diameter of not less than 500mm, which poses a high risk of interference with the impeller blades during machining. To avoid interference, an extended tool with a length of not less than 300mm is required. However, the extended tool leads to a decrease in rigidity, resulting in reduced machining efficiency and affecting machining accuracy, making it difficult to guarantee the machining quality of the closed impeller.

[0008] On January 28, 2026, a search was conducted in the China Patent Publication Database using "horizontal and milling machine and vertical and closed and impeller and rotation" as the abstract keywords, with the option to allow synonym expansion, but no relevant literature was found.

[0009] On January 28, 2026, an abstract search was conducted on CNKI (China National Knowledge Infrastructure) for the keywords "horizontal milling machine, vertical milling machine, closed milling machine, impeller, and rotation," but no relevant literature was found.

[0010] On January 28, 2026, a search was conducted on the website of the United States Patent and Trademark Office for the term "Horizontal with Milling machine with Vertical with Closed type with Impeller with Rotation," but no relevant literature was found; the search URL is https: / / ppubs.uspto.gov / pubwebapp / .

[0011] On January 28, 2026, a search was conducted on WIPO's website https: / / patentscope2.wipo.int / for the term "Horizontal and Milling machine and Vertical and Closed type and Impeller and Rotation", but no relevant literature was found.

[0012] On January 28, 2026, a search was conducted on the website of the Japan Patent Office (https: / / www.j-platpat.inpit.go.jp / ) for the term "Horizontal and Milling machine and Vertical and Closed type and Impeller and Rotation," but no relevant literature was found.

[0013] This is completely different from the concept of the present invention. Summary of the Invention

[0014] Purpose of the invention: To provide a method for machining integral closed impellers by combining a planer-type boring machine and a vertical rotary table with better performance. For specific purposes, see the several substantial technical effects in the specific implementation section.

[0015] To achieve the above objectives, the present invention adopts the following technical solution:

[0016] A method for machining integral closed impellers using a planer-type boring machine and a vertical rotary table, characterized in that...

[0017] This method achieves machining by using a planer-type boring machine and a vertical rotary table in combination;

[0018] A rotary table 2 is arranged on one side of the machining head of the rotary table 5 of the planer-type boring machine;

[0019] The rotary worktable 2 is arranged vertically and includes a housing. A rotary motor is arranged in the housing. The rotary motor is a forward and reverse motor. A fixed plate is arranged on the power shaft of the rotary motor. The bottom of the workpiece 4 to be processed is fixed relative to the fixed plate by a connecting structure 3, which serves as a clamp.

[0020] The workpiece to be processed is a structure capable of machining an integral closed impeller;

[0021] The rotary table 2 is a vertical table;

[0022] The rotary table 2's rotating motor drives the workpiece 4 to be processed, enabling multi-angle processing.

[0023] The planer-type boring machine, combined with the integrated high-precision vertical rotary table, forms a new linkage machining system. From a horizontal machining perspective, the machining status inside the flow channel is clearly visible, which is convenient for real-time monitoring. The chips are naturally discharged with the assistance of gravity, which facilitates the removal of iron filings.

[0024] A further technical solution of the present invention is that the rotary table 2 has a machining indexing accuracy of ≤5″, the spindle torque of the planer-type boring machine is ≥2000N・m, and the long-stroke boring bar can be extended to 800mm.

[0025] A further technical solution of the present invention is that the planer-type boring machine includes a telescopic boring bar design, the distance between the spindle head and the workpiece is adjustable, and the interference of flow channel machining is small.

[0026] A further technical solution of the present invention is that the rotation angle of the rotary table 2's rotating motor can be adjusted in conjunction with the planer-type boring machine, that is, the position of the workpiece 4 to be processed is adjusted by the rotation angle, and the position of the processing head is adjusted by the planer-type boring machine.

[0027] A further technical solution of the present invention is that it also includes a high-pressure cooling system, which is a device for delivering cutting fluid under high pressure, spraying the cutting fluid onto the cutting area between the tool and the workpiece, thereby both cooling and removing chips.

[0028] A further technical solution of the present invention is that a guard plate is arranged below the rotary table 5 of the planer-type boring machine.

[0029] A further technical solution of the present invention is that the workpiece 4 to be processed can be processed into a closed impeller flow channel.

[0030] A further technical solution of the present invention is that the connecting structure 3 is a threaded hole arranged on the fixed plate, and the workpiece 4 to be processed is also arranged with a threaded hole, and the two threaded holes are connected by bolts.

[0031] The present invention, employing the above technical solution, has the following beneficial effects compared to the prior art: Addressing the urgent need for large, integral, closed impellers (1000mm-1600mm) in high-end equipment fields such as petrochemicals and air energy storage, and to solve the bottlenecks of existing processing equipment in terms of processing range, precision, efficiency, and stability, this solution achieves efficient, high-precision, and low-cost integrated processing of such impellers. Based on a traditional horizontal boring machine, this solution integrates a high-precision vertical rotary table with an indexing accuracy ≤5″, constructing a five-axis linkage processing system. It retains the core advantages of the horizontal boring machine, such as a spindle torque ≥2000N・m and a boring bar extension up to 800mm. The core advantages are prominent: firstly, the processing range covers 1000mm-1600mm. The machine features a large impeller with a maximum machining diameter of 1600mm; a horizontal layout with a telescopic boring bar, adjustable spindle head and workpiece distance, minimal interference during flow channel machining, and tool length reduction of 30%-50% with increased rigidity of 40%, effectively suppressing tool deflection and vibration; and a horizontal machining perspective for clear monitoring of the flow channel's internal machining status, with chips naturally discharged by gravity, and a high-pressure cooling system increasing chip removal efficiency by 60%, preventing chip damage to the workpiece. Compared to existing cradle-type and vertical-horizontal convertible five-axis machines, this machine offers a superior maximum machining diameter, approximately 30% longer tool life, excellent machining visibility, and low interference risk. It also specifically addresses several core defects of existing technologies: by combining a telescopic boring bar with a vertical rotary table, it adapts to flow channel spaces with large width-to-depth ratios, eliminating the need for slender tools, and relying on high spindle torque to ensure tool rigidity, thus preventing tool deflection and vibration at the source and ensuring blade shape accuracy and surface quality; the combination of a horizontal boring bar and a high-precision vertical rotary table... The five-axis linkage system adjusts the position of the workpiece and machining head in tandem, providing clear visibility and precisely avoiding blade interference, thus reducing the difficulty of planning the path for complex curved blade surfaces. The vertical rotary table gravity chip removal design, combined with a high-pressure cooling system, efficiently removes chips and prevents secondary cutting, while rapidly cooling the workpiece to address tool wear, burn-out, and workpiece thermal deformation. The horizontal boring five-axis linkage machining system, combined with efficient cutting processes, eliminates the complex EDM process and subsequent impeller welding steps, significantly shortening the cycle time, reducing costs, and adapting to high-volume processing needs. The combination of a horizontal machining perspective and a vertical rotary table solves the problems of poor visibility and difficult chip removal. The rigid structure of the horizontal boring machine and the stable support of the rotary table prevent vibration under heavy loads, ensuring stable machining. The compact horizontal boring spindle head, telescopic boring bar, and five-axis linkage adjustment avoid interference between the spindle head and blades, eliminating the need for extended tools, ensuring tool rigidity, improving machining efficiency and accuracy, and meeting the quality requirements for closed impeller machining. Attached Figure Description

[0032] To further illustrate the present invention, the following description is provided in conjunction with the accompanying drawings:

[0033] Figure 1 This is a schematic diagram of the invention.

[0034] Figure 2 An installation diagram of the workpiece to be processed for the invention;

[0035] Figure 3 Layout diagram of a conventional horizontal five-axis machining center;

[0036] Figure 4 This is a layout diagram of a cradle-type five-axis machining center based on existing technology.

[0037] The components include: 1. Spindle power system of planer-type boring machine; 2. Vertical rotary table; 3. Connecting structure; 4. Workpiece to be processed; 5. Rotary table of planer-type boring machine. Detailed Implementation

[0038] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.

[0040] This invention provides multiple parallel solutions; the different descriptions represent improved solutions or parallel solutions based on the basic solution. Each solution has its own unique characteristics. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other. Fixing methods not described herein can be any type of fixing, such as threaded fixing, bolt fixing, or adhesive bonding.

[0041] Example 1: Referring to all the attached drawings; a method for machining an integral closed impeller using a planer-type boring machine and a vertical rotary table, characterized in that,

[0042] This method achieves machining by using a planer-type boring machine and a vertical rotary table in combination;

[0043] A vertical rotary table 2 is arranged on the rotary table 5 of the planer-type boring machine;

[0044] The rotary worktable 2 is arranged vertically and includes a housing. A rotary motor is arranged in the housing. The rotary motor is a forward and reverse motor. A fixed plate is arranged on the power shaft of the rotary motor. The bottom of the workpiece 4 to be processed is fixed relative to the fixed plate by a connecting structure 3, which serves as a clamp.

[0045] The workpiece to be processed is a structure capable of machining an integral closed impeller;

[0046] The rotary table 2 is a vertical table;

[0047] The rotary table 2's rotating motor drives the workpiece 4 to be processed, enabling multi-angle processing.

[0048] The planer-type boring machine, combined with the integrated high-precision vertical rotary table, forms a new linkage machining system. From a horizontal machining perspective, the machining status inside the flow channel is clearly visible, which is convenient for real-time monitoring. The chips are naturally discharged with the assistance of gravity, which facilitates the removal of iron filings.

[0049] The substantive technical effects and their implementation process, i.e., the basic functions and non-obviousness, are as follows:

[0050] Addressing the urgent need for large integral closed impellers with diameters of 1000mm-1600mm in high-end equipment fields such as petrochemicals and air energy storage, this project aims to overcome the technical bottlenecks of existing processing equipment in terms of processing range, precision, efficiency, and stability, and achieve efficient, high-precision, and low-cost integrated processing of large integral closed impellers.

[0051] Based on the traditional horizontal boring machine, a high-precision vertical rotary table with an indexing accuracy of ≤5″ is integrated to form a five-axis linkage machining system, retaining the core advantages of the horizontal boring machine, such as a high-torque spindle torque of ≥2000N・m and a long-stroke boring bar that can be extended to 800mm.

[0052] Core technological advantages:

[0053] 1. Breakthrough in processing range: Maximum processing diameter up to 1600mm, covering large impellers from 1000mm to 1600mm;

[0054] 1. Optimized interference control: Horizontal layout + telescopic boring bar design, adjustable distance between spindle head and workpiece, small interference in flow channel machining, tool length can be shortened by 30%-50%, tool rigidity is increased by 40%, effectively suppressing tool deflection and vibration;

[0055] 1. Improved visibility and chip removal: Under a horizontal machining perspective, the machining status inside the flow channel is clearly visible, facilitating real-time monitoring; chips are naturally discharged with the assistance of gravity, making it easier to remove iron filings. Combined with a high-pressure cooling system, chip removal efficiency is increased by 60%, preventing chips from scratching the workpiece.

[0056] (III) Performance Comparison Table with Existing Equipment

[0057] Performance indicators The device of the present invention Cradle-style five-axis Vertical / Horizontal Convertible Five-Axis Maximum machining diameter 1600mm 1000mm closed impeller 1100mm closed impeller Tool life Extended by approximately 30% conventional shorten by about 20% Processing visibility Good real-time monitoring Poor occlusion General partial occlusion Processing interference Small interference Larger interference Interference

[0058] In contrast to the shortcomings of existing technologies, such as "the challenges of space and tool rigidity, where the width-to-depth ratio of the flow channel structure often exceeds 1:5, resulting in extremely limited space and requiring the use of slender tools with a large length-to-diameter ratio for machining, which easily leads to insufficient tool rigidity, tool deflection, and vibration, severely affecting blade profile accuracy and surface quality," this invention innovatively combines "the telescopic boring bar design of a planer-type boring machine with a vertically arranged rotary table." The telescopic boring bar allows for adjustable distance between the spindle head and the workpiece, adapting to the space requirements of flow channels with large width-to-depth ratios. It eliminates the need for slender tools with excessively large length-to-diameter ratios. Simultaneously, the spindle torque of the planer-type boring machine is ≥2000 N·m, ensuring tool rigidity and fundamentally avoiding tool deflection and vibration problems, thus ensuring blade profile accuracy and surface quality.

[0059] In contrast to the shortcomings of existing technologies, such as "problems with programming and machining path planning, impeller blades are mostly complex three-dimensional freeform surfaces with large blade twist and small blade spacing, resulting in a high risk of interference between adjacent blades," this invention innovatively and non-obviously combines a planer-type boring machine with a vertical rotary table with an indexing accuracy of ≤5″ to form a five-axis linkage machining system. By linking the rotary table's rotating motor with the planer-type boring machine, the position of the workpiece and the machining head are optimized in real time. Combined with the clear visibility from a horizontal machining perspective, the interference risk between adjacent blades is accurately avoided, reducing the difficulty of machining path planning for complex three-dimensional freeform surface blades.

[0060] Compared to the shortcomings of existing technologies, such as "difficulties in chip removal and heat dissipation control, narrow flow channels making it difficult for chips to be discharged smoothly, easily causing accumulation and secondary cutting, and poor heat dissipation conditions in the machining area, with local temperatures often reaching 300-500°C, which can easily lead to premature tool wear, burning, and workpiece thermal deformation," this invention innovatively combines "the gravity chip removal design of a vertical rotary table with a high-pressure cooling system." By using a vertically arranged rotary table to drive the workpiece to be processed to rotate, the chips fall naturally into the rotary table of the planer-type boring machine under gravity. At the same time, the high-pressure cooling system sprays cutting fluid into the cutting area, which not only achieves efficient chip removal and avoids secondary cutting, but also quickly reduces the temperature of the machining area, solving the problems of tool wear, burning, and workpiece thermal deformation caused by poor heat dissipation conditions.

[0061] In contrast to the shortcomings of existing technologies, such as the "efficiency and cost issues of five-axis EDM, with a single-piece processing cycle of 20-30 days and processing costs 3-5 times that of conventional cutting, making it difficult to adapt to large-volume, low-cost processing scenarios," this invention innovatively combines a "horizontal boring five-axis linkage machining system with a high-efficiency cutting process." By achieving integrated machining through five-axis linkage, it eliminates the complex electrical discharge machining process in five-axis EDM, avoids the subsequent processing steps of welded impellers, significantly shortens the processing cycle, and eliminates the need for high EDM consumables and equipment maintenance costs, making it suitable for large-volume, low-cost processing needs.

[0062] In contrast to the shortcomings of existing technologies, such as "poor visibility during machining on the rotary table of a cradle-type planer boring machine, difficulty in chip removal, and insufficient rigidity of the worktable under heavy-duty machining conditions, which easily leads to vibration problems and affects machining stability," this invention innovatively combines "a vertically arranged rotary worktable with the horizontal machining perspective of a planer boring machine." The horizontal machining perspective makes the machining status inside the flow channel clearly visible, facilitating real-time monitoring and solving the problem of poor visibility. Chips are naturally discharged into the rotary worktable of the planer boring machine under gravity, reducing the difficulty of chip removal. At the same time, the rigid structure of the planer boring machine and the stable support design of the vertical rotary worktable prevent worktable vibration under heavy-duty machining conditions, ensuring machining stability.

[0063] In contrast to the shortcomings of existing technologies, such as the large spindle head of the rotary table in vertical-horizontal convertible planer boring machines (with a diameter of at least 500mm, posing a high risk of interference with impeller blades during machining), and the need to use extended tools of at least 300mm to avoid interference, which leads to reduced rigidity, lower machining efficiency, and compromised machining accuracy, this invention innovatively combines the compact spindle head design of a planer boring machine with a telescopic boring bar and a five-axis linkage adjustment mechanism. By flexibly adjusting the distance between the spindle head and the workpiece using the telescopic boring bar, and optimizing the linkage position between the rotary table and the machining head, the risk of interference between the spindle head and impeller blades is completely avoided. This eliminates the need for extended tools, ensuring tool rigidity while improving machining efficiency and accuracy, thus meeting the machining quality requirements of closed impellers.

[0064] Example 2: As a further improvement, parallel, or optional independent solution, the rotary table 2 has a machining indexing accuracy of ≤5″, the spindle torque of the planer-type boring machine is ≥2000 N·m, and the long-stroke boring bar can be extended to 800 mm. The substantial technical effects and their implementation process, i.e., the basic functions and non-obvious aspects, are as follows: Combined machining can increase machining speed and allow for greater adjustment dimensions.

[0065] Example 3: As a further improvement, parallel, or optional independent solution, the planer-type boring machine incorporates a telescopic boring bar design, adjustable distance between the spindle head and the workpiece, and minimal interference during flow channel machining. The substantial technical effects and their implementation process, i.e., basic functions and non-obvious aspects, are as follows: the machining length can be adjusted.

[0066] Example 4: As a further improvement, parallel, or optional independent solution, the rotation angle of the rotary table 2's rotary motor can be adjusted in conjunction with the planer-type boring machine. That is, the position of the workpiece 4 to be processed is adjusted by the rotation angle, and the position of the machining head is adjusted by the planer-type boring machine. The substantial technical effect and its implementation process, i.e., the basic function and non-obvious aspects, are as follows: It enables rapid workpiece adjustment and machining, avoiding the disadvantages of traditional five-axis machining requiring multi-directional coordinate system adjustments.

[0067] Example 5: As a further improvement, parallel, or optional independent solution, it also includes a high-pressure cooling system. This system is a device that delivers cutting fluid at high pressure, spraying the fluid onto the cutting area between the tool and the workpiece, thus both cooling and chip removal. The substantial technical effect and its implementation process, i.e., the basic function and non-obvious aspects, are as follows: improved chip removal.

[0068] Example 6: As a further improvement, parallel, or optional independent solution, a guard plate is arranged under the rotary table 5 of the planer boring machine.

[0069] Example 7: As a further improvement, parallel, or optional independent solution, the workpiece 4 to be processed can be processed into a closed impeller flow channel.

[0070] Example 8: As a further improvement, parallel, or optional independent solution, the connecting structure 3 consists of threaded holes arranged on the fixed plate, and the workpiece 4 to be processed also has threaded holes. The two threaded holes are connected by bolts. The substantial technical effects and their implementation process, i.e., the basic functions and non-obvious aspects, are as follows: The clamping system and structure of the mold are existing technologies and will not be described in detail here.

[0071] In general, this invention relates to the field of machining, and more particularly to a method for machining integral closed impellers using a planer-type boring machine and a vertical rotary table. This method achieves machining through the cooperation of a planer-type boring machine and a vertical rotary table; the planer-type boring machine is constructed by adding a vertical rotary table 2 to the rotary table 5 of the planer-type boring machine; the vertical rotary table is fixed to the bottom of the workpiece 4 to be machined via a connecting structure 3; the workpiece to be machined is a blank of an integral closed impeller; the rotary table 2 is a vertical table; the rotation of the rotary table 2's motor drives the workpiece 4 to rotate for machining; the planer-type boring machine combined with the integrated high-precision vertical rotary table forms a new linkage machining system. From a horizontal machining perspective, the machining status inside the flow channel is clearly visible, facilitating real-time monitoring; chips are easily discharged. The spindle power system 1 features a slender and extendable boring bar, resulting in minimal interference during machining.

[0072] Innovatively, each of the above effects exists independently, yet a single structure can be used to combine the results.

[0073] It should be noted that the various modules of this invention are an integration of existing technology modules and do not involve any new modules. Even if some modules use programs, those programs are undoubtedly known programs.

[0074] It should be noted that the multiple solutions provided by this invention include their own basic solutions, are independent of each other and do not restrict each other, but they can also be combined with each other without conflict to achieve multiple effects together.

[0075] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims.

Claims

1. A method for machining an integral closed impeller using a planer-type boring machine and a vertical rotary table, characterized in that, This method achieves machining by using a planer-type boring machine and a vertical rotary table in combination; Add a vertical rotary table (2) to the rotary table (5) of the planer boring machine; The rotary worktable (2) is arranged vertically. The rotary worktable (2) includes a housing. A rotary motor is arranged in the housing. The rotary motor is a forward and reverse motor. A fixed disk is arranged on the power shaft of the rotary motor. The bottom of the workpiece (4) to be processed is fixed relative to the fixed disk through a connecting structure (3). The workpiece to be processed is a blank of an integral closed impeller; The rotary table (2) is a vertical table; The rotating motor of the rotary table (2) drives the workpiece (4) to be processed to achieve multi-angle processing; The planer-type boring machine, combined with the integrated high-precision vertical rotary table, forms a new linkage machining system. From a horizontal machining perspective, the machining status inside the flow channel is clearly visible, which is convenient for real-time monitoring. The chips are naturally discharged with the assistance of gravity, which facilitates the removal of iron filings.

2. The method for machining an integral closed impeller using a planer-type boring machine and a vertical rotary table as described in claim 1, characterized in that... The rotary worktable (2) has an indexing accuracy of ≤5″, the spindle torque of the planer-type boring machine is ≥2000N・m, and the long-stroke boring bar can be extended to 800mm.

3. The method for machining an integral closed impeller using a planer-type boring machine and a vertical rotary table as described in claim 1, characterized in that... The planer-type boring machine includes a telescopic boring bar design, the distance between the spindle head and the workpiece is adjustable, and the interference of flow channel machining is small.

4. The method for machining an integral closed impeller using a planer-type boring machine and a vertical rotary table as described in claim 1, characterized in that... The rotation angle of the rotary table (2) can be adjusted in conjunction with the rotary table of the planer boring machine. That is, the position of the workpiece (4) to be processed can be adjusted by rotating the angle, and the position of the machining spindle head can be adjusted by the planer boring machine.

5. The method for machining an integral closed impeller using a planer-type boring machine and a vertical rotary table as described in claim 1, characterized in that... It also includes a high-pressure cooling system, which is a device that delivers cutting fluid at high pressure, spraying the cutting fluid onto the cutting area between the tool and the workpiece to both cool it down and remove chips.

6. The method for machining an integral closed impeller using a planer-type boring machine and a vertical rotary table as described in claim 1, characterized in that... A guard plate is arranged under the rotary table (5) of the planer-type boring machine.

7. The method for machining an integral closed impeller using a planer-type boring machine and a vertical rotary table as described in claim 1, characterized in that... The workpiece to be processed (4) can be processed into a closed impeller flow channel.

8. The method for machining an integral closed impeller using a planer-type boring machine and a vertical rotary table as described in claim 1, characterized in that... The connecting structure (3) is a threaded hole arranged on the fixed plate, and the workpiece (4) to be processed is also arranged with a threaded hole. The two threaded holes are connected by bolts.

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