A method for correcting boring of large housings

Abstract

The present application belongs to the technical field of mechanical processing, and specifically discloses a correction method for processing large machine shells on a boring machine, which comprises the following steps: setting a correction platform, setting a balance lug, correcting the positions during the processing of a middle split surface and an arc cavity, obtaining a correction reference for the processing of a machine shell assembly, and correcting the positions during the processing of the sealing positions at both ends of the machine shell assembly. Compared with the prior art, the present application effectively solves the problem of the difficulty in accurately aligning and fine-tuning a large machine shell on a fixed workbench by constructing a systematic correction system and using a step-by-step, fine and controllable adjustment mechanism. The positioning accuracy and correction efficiency of the large machine shell on the fixed workbench of the boring machine are significantly improved, the operation process is simplified, and the dependence on the experience of the operator is reduced, thereby effectively guaranteeing the processing quality of key positions such as the middle split surface, the arc cavity and the sealing positions of the assembly, and improving the reliability and consistency of the overall processing technology.

Description

Technical Field

[0001] This invention belongs to the field of machining technology, and in particular relates to a method for correcting large machine housings machined by boring machines. Background Technology

[0002] The housing is the outer shell of a large centrifugal vacuum pump compressor, and its machining quality has a significant impact on the overall performance of the equipment. Common large housings often employ a horizontally split structure, consisting of an upper housing and a lower housing. In conventional housing manufacturing processes, the upper and lower housings need to be machined separately on a CNC gantry milling machine for the horizontal split surface, internal partitions, and positioning cavities. Subsequently, the upper and lower housings are assembled, and the bearing and sealing positions are machined on a CNC floor-type boring and milling machine. This horizontal clamping method offers advantages such as simple operation during the machining preparation stage, easy control during hoisting, and relatively intuitive and efficient calibration.

[0003] However, for certain large vacuum pump housings, the dimensions and weight exceed conventional ranges: the upper housing measures 4133 mm × 3760 mm × 1700 mm, with a raw weight of approximately 23 tons; the lower housing measures 4868 mm × 3760 mm × 2800 mm, with a raw weight of approximately 28 tons; the combined weight of these upper and lower housings reaches 46 tons. However, the working stroke of existing CNC gantry milling machines cannot accommodate such large housings, making it impossible to perform machining tasks on the horizontal split surface, internal partitions, and positioning cavities. Furthermore, the maximum load capacity of the rotary table on most conventional CNC floor-type boring machines is only 40 tons, insufficient to support the machining of bearing and sealing positions on the combined housing. Therefore, to address these shortcomings, companies need to outsource manufacturing, leading to increased production costs and longer production cycles. This severely restricts cost control and production schedule management for centrifugal vacuum pump compressors, and the quality of outsourced manufacturing is difficult to monitor effectively, posing potential risks.

[0004] Furthermore, when machining large machine housings using a fixed worktable on a CNC floor-type boring and milling machine, the traditional calibration methods are ill-suited to the clamping environment of the fixed worktable due to the large weight and volume of the housing. This makes it difficult to guarantee the housing's positioning accuracy, adjust its posture during hoisting, and perform complex fine-tuning operations during the machining of the split surface and arc cavities. These issues easily lead to the accumulation of machining deviations, affecting the final assembly accuracy and the stability of equipment operation. These problems highlight the shortcomings of existing technologies in the calibration of large machine housings, necessitating the development of an efficient calibration solution suitable for a fixed worktable.

[0005] To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention

[0006] The purpose of this invention is to provide a correction method for machining large machine housings on a boring machine, so as to solve the technical problem that it is difficult to perform accurate and efficient position correction of large machine housings on a fixed worktable in the prior art, effectively improve the correction accuracy, simplify the operation process, and ensure the machining quality.

[0007] To achieve the above objectives, the technical solution of the present invention is: a method for correcting large machine housings machined on a boring machine, comprising:

[0008] Setting up a straightening platform: The straightening platform is fixedly installed on the fixed worktable of the boring machine. The straightening platform has a preset reference surface and a preset connection structure. The upper surface of the straightening platform is a reference surface used to support and position the machine housing, and the side surface of the straightening platform is a connection surface with a preset connection structure. Using the preset connection structure on the straightening platform, the straightening element is connected to the straightening platform.

[0009] Set up balancing lugs: Multiple symmetrically arranged balancing lugs are set on the side plates of the upper and lower housings respectively to achieve balanced lifting of the upper and lower housings and position and posture adjustment during the processing process.

[0010] Position correction during machining of the split surface and arc cavity:

[0011] Using a steel wire rope connected to the balance lug of the lower housing, the lower housing is lifted, transported and placed on the reference surface of the correction platform in a vertical manner with the center split surface of the lower housing. After placement, the center split surface of the lower housing extends 5-10mm beyond the corresponding connecting surface of the positioning platform in the horizontal direction, while the steel wire rope is in a taut state.

[0012] The vertical position of the lower housing away from the split surface is lifted and finely adjusted by jacks, thereby adjusting the vertical position of the split surface of the lower housing. Then, the straightening element is adjusted to drive the lower housing to make fine adjustments in the horizontal position, thereby adjusting the horizontal position of the split surface of the lower housing. While adjusting the position, the position of the split surface of the lower housing is monitored by a detection tool until the position deviation of the split surface of the lower housing meets the preset accuracy conditions. The lower housing is then tightened, the steel wire rope is loosened, and the detection tool is used again to confirm that the split surface of the lower housing meets the preset accuracy conditions. Then, the split surface and arc cavity of the lower housing are processed.

[0013] Repeat the aforementioned steps to correct the position of the upper housing. After the correction is completed, perform machining operations on the split surface and arc cavity of the upper housing.

[0014] The machining calibration benchmark for the housing assembly was obtained as follows:

[0015] The lower housing is installed horizontally on the rotary table of the floor-type boring and milling machine. The bearing positions at both ends of the lower housing are roughed and finished in sequence to ensure the coaxiality of the bearing positions at both ends. After the machining is completed, the bearing positions at both ends of the lower housing will be used as the correction reference when machining the sealing positions at both ends of the housing assembly.

[0016] Position adjustment when machining the sealing positions at both ends of the housing assembly:

[0017] The upper and lower housings are combined to form a housing assembly. The housing assembly is lifted and transported to the reference surface of the straightening platform using lifting lugs. The straightening elements are adjusted to drive the housing assembly to make fine adjustments to its horizontal position within the reference surface until the position deviation of the corresponding side of the correction reference is less than 0.01mm. The sealing position at one end of the housing assembly is then machined.

[0018] After lifting the housing assembly with the lifting lugs and turning it around, place it back on the reference surface. Repeat the aforementioned steps to readjust the position of the housing assembly until the positional deviation of the corresponding side correction reference is less than 0.01mm. Then, process the sealing position at the other end of the housing assembly.

[0019] Furthermore, the corrective element includes a connecting screw, a corrective plate, and a corrective nut. The preset connection structure consists of multiple threaded connection holes arranged circumferentially on the connection surface of the corrective platform. The connecting screw is installed on the connection structure by means of a threaded connection. The corrective plate is installed on the connecting screw in a way that allows it to move axially along the connecting screw. The corrective nut is threaded onto the connecting screw. The corrective plate is located between the corrective nut and the corrective platform.

[0020] Furthermore, the upper part of the correction plate is provided with a detachable extension plate, one end of which is connected to the correction plate and the other end extends horizontally toward the correction platform; the lower part of the correction plate is provided with a pad, which is installed on the wall of the correction plate facing the correction platform.

[0021] Furthermore, the specific steps for adjusting the corrective elements and driving the lower housing to make fine adjustments to its lateral position are as follows:

[0022] Tighten the adjusting nut, and the straightening plate is driven by the adjusting nut to directly fit against the center surface of the lower housing, thus pushing the lower housing to move.

[0023] Furthermore, the specific steps for adjusting the straightening element and driving the housing assembly to make fine adjustments to its horizontal position within the reference plane are as follows: Tighten the adjusting nut, and the straightening plate is driven by the adjusting nut to move towards the housing assembly. After the extension plate abuts against the housing assembly, continue to tighten the adjusting nut, and the straightening plate moves accordingly and pushes the housing assembly to move through the extension plate.

[0024] Furthermore, the reference surface of the correction platform is provided with multiple fixing threaded holes to fix the upper or lower housing.

[0025] The beneficial effects of this technical solution are as follows:

[0026] This invention relates to a method for correcting large machine housings machined on a boring machine. By setting a correction platform on the fixed worktable of the boring machine, a stable correction foundation with a precise reference surface and connectable correction elements is constructed. The installation of balancing lugs enables balanced hoisting of the machine housing, providing a prerequisite for subsequent precise placement. During the machining of the split surface and arc cavity, a step-by-step operation combining initial constraint with steel wire rope, vertical fine-tuning with jacks, and horizontal fine-tuning with correction elements, supplemented by real-time monitoring with detection tools, achieves high-precision position correction of the massive machine housing on the fixed worktable. When machining the sealing positions at both ends of the machine housing assembly, relying on the pre-machined correction reference and combining it with correction elements, the horizontal position of the assembly is finely adjusted. By turning the adjusting nut to drive the correction plate with an extension plate, the assembly is smoothly pushed, ensuring that the positional deviation of the correction reference is less than 0.01 mm, resulting in high correction accuracy.

[0027] Compared to existing technologies, this invention effectively solves the problem of precise alignment and fine-tuning of large machine housings on a fixed worktable by constructing a systematic correction system and adopting a step-by-step, precise, and controllable adjustment mechanism. It significantly improves the positioning accuracy and correction efficiency of large machine housings on the fixed worktable of a boring machine, simplifies the operation process, reduces reliance on operator experience, and thus effectively ensures the machining quality of key components such as the split surface, arc cavity, and sealing position of the assembly, improving the reliability and consistency of the overall machining process. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the correction process for a method of correcting a large machine housing machined on a boring machine according to the present invention;

[0029] Figure 2 This is a schematic diagram showing the positional distribution of the balance lugs in the main view of the housing assembly of the present invention.

[0030] Figure 3 This is a schematic diagram showing the positional distribution of the balance lugs in a side view of the housing assembly of the present invention.

[0031] Figure 4 This is a top view of the correction platform.

[0032] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0033] Figure 6 A side view diagram of the correction platform;

[0034] Figure 7 This is a schematic diagram of the corrective element.

[0035] Figure 8 This is a schematic diagram illustrating the correction of the split surface of the lower housing according to the present invention;

[0036] Figure 9 This is a schematic diagram of the correction of the housing assembly of the present invention;

[0037] Figure 10 for Figure 8 A magnified view of a section at point B in the middle;

[0038] Figure 11 for Figure 9 A magnified view of a section at point C. Detailed Implementation

[0039] The following detailed description illustrates the specific implementation method:

[0040] The reference numerals in the accompanying drawings include: upper housing 1, lower housing 2, split surface 201, bottom flange 202, balance lug 3, reference surface 4, fixing threaded hole 401, connecting surface 5, straightening plate 6, connecting screw 7, straightening nut 8, pad 9, extension plate 10.

[0041] 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.

[0042] The basic implementation examples are as follows: Figure 1-11 As shown: A method for correcting large machine housings machined on a boring machine, the method specifically includes:

[0043] Setting up the straightening platform: The straightening platform is fixedly installed on the fixed worktable of the boring machine. The platform can be directly fixed to the T-slots or pre-drilled mounting holes of the fixed worktable using bolts, pressure plates, or other fasteners. The straightening platform has a preset reference surface 4 and a preset connection structure. To ensure accurate positioning, the platform is made of HT300 steel. Both the upper and lower end faces of the platform undergo roughing and finishing to ensure necessary flatness and parallelism. Stress relief treatment was performed before machining to ensure dimensional stability. Furthermore, the upper end face of the straightening platform serves as the reference surface 4 for supporting and positioning the machine housing. Multiple threaded holes 401 are distributed on the upper end face for installing screws used to clamp the machine housing. The side face of the straightening platform (i.e., the circumferential vertical end face) is a connection surface 5 with a preset connection structure. The straightening element is connected to the straightening platform using this preset connection structure. This embodiment achieves the function of machining large machine housings on existing equipment by fixing the straightening platform to the fixed worktable of the boring machine and connecting the straightening elements using the reference surface 4 on the platform and the connecting structure. This avoids the high cost and long cycle caused by outsourcing the machining of large machine housings due to size and weight limitations, and helps to ensure machining quality. Furthermore, the straightening elements in this embodiment include a connecting screw 7, a straightening plate 6, and a straightening nut 8. The preset connecting structure consists of multiple threaded connecting holes arranged on the connecting surface 5 along the circumference of the straightening platform. The connecting screw 7 is installed in the connecting structure by threaded connection. The straightening plate 6 is installed in the connecting screw 7 in a drivable manner along the axial direction of the connecting screw 7. The straightening nut 8 is threadedly installed in the connecting screw 7. The straightening plate 6 is located between the straightening nut 8 and the straightening platform. The connecting screw 7 provides guidance and support for axial movement. The straightening plate 6 is used to directly or indirectly push the corresponding housing. The straightening nut 8 acts as a force-applying component, providing axial thrust to move the straightening plate 6. Furthermore, a detachable extension plate 10 is provided on the upper part of the straightening plate 6. One end of the extension plate 10 is connected to the straightening plate 6, and the other end extends horizontally towards the straightening platform. The extension plate 10 increases the effective contact range of the straightening plate 6, allowing it to reach housing parts further away, thus enabling more flexible adjustments. A pad 9 is provided on the lower part of the straightening plate 6. The pad 9 is installed on the wall facing the straightening platform side of the straightening plate 6. The pad 9 is a solid block structure, fixed to the wall facing the straightening platform side of the straightening plate 6 by welding, bolting, or other methods. Its function is to prevent the straightening plate 6 from directly impacting the straightening platform, while effectively controlling the lateral distance between the straightening plate 6 and the straightening platform, thereby achieving control over the centering plane position correction.

[0044] Balance lugs 3 are provided: Multiple symmetrically arranged balance lugs 3 are respectively provided on the side plates of the upper housing 1 and the lower housing 2 to achieve balanced lifting of the upper housing 1 and the lower housing 2 and positional adjustment during the processing transition. The balance lugs 3 are structural components used for lifting and transportation, and are fixed to the side plates of the corresponding housings by welding, bolting, or other methods. As a preferred embodiment, four balance lugs 3 are provided on the side plates of the upper housing 1 and the lower housing 2 respectively, that is, four balance lugs 3 are provided on the upper housing 1 and four balance lugs 3 are provided on the lower housing 2; and the balance lugs 3 on each housing are symmetrical, which means that they are symmetrical in both the length and width directions of the corresponding housings. To facilitate quick and easy clamping of the upper and lower housings 2, a balancing lug 3 is designed. Simultaneously, the balancing lug 3 also serves as an auxiliary positioning tool. Its levelness and tilt angle can be easily adjusted to ensure the mid-section is perpendicular to the platform and to precisely control its distance from the connecting surface 5, thus meeting the positioning accuracy requirements of subsequent processing. Therefore, during the positioning process before machining the mid-section, the tensioning of the lug with a steel wire rope provides auxiliary positioning. Since the machining process of the upper and lower housings 2 involves roughing, semi-finishing, and finishing, requiring multiple lifting and clamping operations, the center of gravity of the housing changes with each clamping operation due to the removal of excess material. Therefore, this design of the balancing lug 3 provides balanced lifting at each stage.

[0045] Position correction during machining of the split surface and arc cavity:

[0046] Using a steel wire rope connected to the balance lug 3 of the lower housing 2 via a buckle, the housing is lifted in a balanced manner. After lifting, the mid-section 201 of the lower housing 2 is perpendicular to (or visually perpendicular; due to swaying during the lifting process, absolute perpendicularity cannot be guaranteed, but its overall trend is vertical, which is understandable to those skilled in the art and will not be elaborated here) reference surface 4. It is then transported and placed on the reference surface 4 of the correction platform. For ease of subsequent correction, after placement, the mid-section 201 of the lower housing 2 extends 55-10mm beyond the corresponding connecting surface of the positioning platform in the horizontal direction, and the steel wire rope should be taut.

[0047] By using jacks to lift and fine-tune the vertical position of the end of the lower housing 2 away from the center plane 201, the vertical position of the center plane 201 of the lower housing 2 can be adjusted. The specific lifting position can be selected and adjusted by those skilled in the art according to the actual housing structure or site conditions. For example, the lifting position is the rear positioning point of the lower housing 2. The purpose is to adjust the center plane 201 of the corresponding housing so that it is perpendicular to the reference plane 4 in the vertical direction, that is, to ensure that the center plane 201 is in a vertical state during the processing.

[0048] Then, the corrective element is adjusted to drive the lower housing 2 to make a slight adjustment in its position in the lateral direction, thereby adjusting the left and right positions of the center plane 201 of the lower housing 2. The specific adjustment steps are as follows: turn the adjusting nut, and the corrective plate 6 is driven by the adjusting nut to directly fit against the center plane 201 of the lower housing 2, and push the lower housing 2 to move.

[0049] While adjusting the position, the position of the mid-face 201 of the lower housing 2 is monitored using a detection tool until the position deviation of the mid-face 201 of the lower housing 2 meets the preset accuracy conditions. Then, the steel wire rope is loosened and the lower housing 2 is pressed and fixed onto the reference surface 4. Subsequently, the mid-face 201 and the arc cavity of the lower housing 2 are processed. The detection tool can be a laser tracker, a coordinate measuring machine, a dial indicator, or a level, etc. In this embodiment, a dial indicator is preferred. First, the dial indicator is used to check the vertical position of the mid-face 201 of the housing to make the data consistent. Then, during the adjustment of the correction element, the dial indicator is used to check the horizontal position of the mid-face 201 of the housing to make the data consistent. At this time, relying on the fixing threaded hole 401 on the reference surface 4, the housing is pressed and fixed by screws and other fasteners. Only then can the steel wire rope be loosened, and the mid-face 201 and the arc cavity of the lower housing 2 are processed. During the correction of the split surface 201, one or more correction elements installed on the connecting surface 5 corresponding to the split surface 201 can be used to coordinate their actions synchronously to achieve precise and rapid position correction. Through position adjustment and correction, the consistency of positioning accuracy of the upper and lower housings 2 before their respective processing is ensured, laying the foundation for subsequent assembly and overall processing. This step-by-step, precise, and controllable correction method effectively solves the problem of difficulty in accurately aligning large housings before processing, significantly improves processing accuracy and efficiency, reduces the difficulty and potential errors of manual operation, and thus ensures the processing quality of the split surface 201 and the arc cavity of the large housing.

[0050] Then the upper housing 1 is processed. Since the correction method and principle are the same, the above steps can be repeated to achieve the position correction of the upper housing 1. After the correction is completed, the upper housing 1 is fixed, and then the corresponding processing operations are carried out on the split surface and arc cavity of the upper housing 1.

[0051] Before machining the sealing positions at both ends of the housing assembly, it is necessary to obtain a correction datum for machining the housing assembly. The method for obtaining the datum can be selected or adjusted by those skilled in the art according to the actual situation. The method for obtaining the correction datum provided in this embodiment is as follows:

[0052] In this embodiment, the correction datum is the bearing positions at both ends of the lower housing 2. Since the bearing positions are key functional parts in the housing machining process, high-precision machining of them and using them as the datum ensures extremely high relative accuracy and coaxiality between the subsequent sealing positions and the bearing positions. This not only avoids the cumulative errors that may be introduced by multiple clamping or datum conversions, but also simplifies the clamping and positioning process of the subsequent housing assembly, significantly improving the machining accuracy of the sealing positions at both ends of the large housing assembly and the overall assembly quality, thereby ensuring the performance and reliability of the final product. The lower housing 2 is mounted horizontally on the rotary table of a floor-type boring and milling machine. The bearing positions at both ends of the lower housing 2 are then rough-machined and finish-machined sequentially to ensure the coaxiality requirements of the bearing positions at both ends. After machining, the bearing positions at both ends of the lower housing 2 become the correction datum when machining the sealing positions at both ends of the housing assembly.

[0053] Once the correction reference is obtained, the position adjustment can be performed when machining the sealing positions at both ends of the housing assembly. The specific steps are as follows:

[0054] First, the sealing position at one end is machined. The upper housing 1 and the lower housing 2 are combined to obtain the housing assembly. The housing assembly is lifted and transported to the reference surface 4 of the straightening platform using lifting lugs. The straightening element is adjusted to drive the housing assembly to make fine adjustments to its horizontal position within the reference surface 4, that is, to adjust its front-back and left-right positions on the reference surface 4. The specific fine adjustment steps are as follows: Tighten the adjusting nut, and the straightening plate 6 is driven by the adjusting nut to move towards the housing assembly until the extension plate 10 abuts against the housing assembly. Continue to tighten the adjusting nut, and the straightening plate 6 moves accordingly and pushes the housing assembly to move through the extension plate 10 until the position deviation of the corresponding side of the correction reference is less than 0.01mm. The sealing position at one end of the housing assembly is then rough and fine machined. The specific abutting position of the extension plate 10 can be adjusted according to the specific structure of the housing. In this embodiment, it is preferably the side end face of the bottom flange 202 of the lower housing 2. At the same time, the bottom surface of the extension plate 10 is preferably in contact with the reference surface 4 to ensure stability during the adjustment process. During correction, multiple correction elements are set along the circumference of the correction platform. Relying on the synchronous and coordinated action of multiple correction elements, the correction operation can be completed quickly and accurately.

[0055] After machining the sealing position at one end, the housing assembly needs to be reversed to machine the sealing position at the other end. The specific steps are as follows: using the balancing lugs 3 mounted on the housing, the housing assembly is safely lifted from the reference surface 4 of the straightening platform and rotated 180 degrees in the air so that the sealing position at the other end faces the boring machine machining area. Then, the reversed housing assembly is smoothly placed back onto the reference surface 4 of the straightening platform. After the housing assembly is reversed and repositioned, the same precise position adjustment steps as when machining the first sealing position need to be performed again until the positional deviation meets the accuracy requirement of less than 0.01mm. Once the housing assembly is precisely adjusted and locked again, the sealing position at the other end of the housing assembly can be machined. The method of this embodiment effectively solves the problems of difficult precise alignment caused by the large size and heavy weight of large housing assemblies when machining the sealing positions at both ends, as well as the difficulty in maintaining accuracy after two machining direction changes. By utilizing the balance lug 3 to achieve safe lifting and orientation adjustment of the housing assembly, and combining it with the correction element for high-precision horizontal position fine adjustment, the correction reference on the corresponding side of the housing assembly can be precisely adjusted to a positional deviation of less than 0.01mm after each placement. This ensures that the sealing positions at both ends of the housing assembly can be aligned with extremely high precision during processing, thereby guaranteeing the consistency and reliability of processing quality and significantly improving the overall assembly accuracy and sealing performance of large housing assemblies.

[0056] It should be noted that the steps of setting up the correction platform and setting up the balancing lugs 3 in this embodiment do not have a strict sequential order. Furthermore, the separate machining of the upper housing 1 and the lower housing 2 also does not have a strict sequential order. Obtaining the correction benchmark only needs to be completed before adjusting the positions of the sealing positions at both ends of the housing assembly. This is understandable to those skilled in the art and will not be elaborated upon here. This step-by-step, precise correction and machining process in this embodiment enables the factory to complete the precision machining of ultra-large housings on existing equipment, effectively solving the problems of high costs, long cycles, and difficulty in quality assurance caused by outsourcing.

[0057] 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.

[0058] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A method for correcting large machine housings machined on a boring machine, characterized in that, include: Setting up a correction platform: The correction platform is fixedly installed on the fixed worktable of the boring machine. The correction platform has a preset reference surface and a preset connection structure. The upper surface of the correction platform is a reference surface for supporting and positioning the machine housing. The side surface of the correction platform is a connection surface with the preset connection structure. The correction element is connected to the correction platform using the preset connection structure on the correction platform. Set up balancing lugs: Multiple symmetrically arranged balancing lugs are set on the side plates of the upper and lower housings respectively to achieve balanced lifting of the upper and lower housings and position and posture adjustment during the processing process. Position correction during machining of the split surface and arc cavity: Using a steel wire rope connected to the balance lug of the lower housing, the lower housing is lifted, transported, and placed on the reference surface of the correction platform in a vertical manner with the split surface of the lower housing perpendicular to it. After placement, the split surface of the lower housing extends 5-10mm beyond the corresponding connecting surface of the positioning platform in the horizontal direction, while the steel wire rope is taut. The lower housing is then lifted by a jack and its vertical position away from the split surface is finely adjusted, thereby adjusting the vertical position of the split surface of the lower housing. Then, the correction element is adjusted to drive the lower housing to make fine adjustments in the horizontal direction, thereby adjusting the horizontal position of the split surface of the lower housing. While adjusting the position, the position of the split surface of the lower housing is monitored using a detection tool until the position deviation of the split surface of the lower housing meets the preset accuracy conditions. The lower housing is then tightened, the steel wire rope is released, and the detection tool is used again to confirm that the split surface of the lower housing meets the preset accuracy conditions. Then, machining operations are carried out on the split surface and arc cavity of the lower housing. Repeat the aforementioned steps to correct the position of the upper housing. After the correction is completed, perform machining operations on the split surface and arc cavity of the upper housing. Obtaining the machining calibration benchmark for the housing assembly: The lower housing is installed on the rotary table of the floor-type boring and milling machine with the split surface horizontal. The bearing positions at both ends of the lower housing are roughed and finished in sequence to ensure the coaxiality requirement of the bearing positions at both ends. After machining, the bearing positions at both ends of the lower housing are the calibration benchmark when machining the sealing positions at both ends of the housing assembly. Position correction during machining of the sealing positions at both ends of the housing assembly: Assemble the upper and lower housings to obtain the housing assembly. Lift the housing assembly using lifting lugs and transport it to the reference surface of the correction platform. Adjust the correction elements to drive the housing assembly to make minor horizontal adjustments within the reference surface until the position deviation of the correction reference on the corresponding side is less than 0.01mm. Machining one end of the housing assembly sealing position. Lift the housing assembly using lifting lugs, turn it around, and place it back on the reference surface. Repeat the above steps to readjust the position of the housing assembly until the position deviation of the correction reference on the corresponding side is less than 0.01mm. Machining the other end of the housing assembly sealing position.

2. The method for correcting a large machine housing machined on a boring machine according to claim 1, characterized in that: The corrective element includes a connecting screw, a corrective plate, and a corrective nut. The preset connection structure consists of multiple threaded connection holes arranged circumferentially on the connection surface of the corrective platform. The connecting screw is installed in the connection structure by means of a threaded connection. The corrective plate is installed in the connecting screw in a manner that allows it to be driven to move axially along the connecting screw. The corrective nut is threadedly installed in the connecting screw. The corrective plate is located between the corrective nut and the corrective platform.

3. The method for correcting a large machine housing machined on a boring machine according to claim 2, characterized in that: The upper part of the correction plate is provided with a detachable extension plate, one end of which is connected to the correction plate and the other end extends horizontally toward the correction platform; the lower part of the correction plate is provided with a pad, which is installed on the wall of the correction plate facing the correction platform.

4. The method for correcting a large machine housing machined on a boring machine according to claim 3, characterized in that: The specific steps for the adjustment and correction element to drive the lower housing to make fine adjustments to its position in the lateral direction are as follows: Tightening the adjusting nut causes the straightening plate to be driven by the adjusting nut to directly adhere to the center surface of the lower housing, thus pushing the lower housing to move.

5. The method for correcting a large machine housing machined on a boring machine according to claim 3, characterized in that: The specific steps for the adjustment and correction element to finely adjust the horizontal position of the housing assembly within the reference plane are as follows: Tighten the adjusting nut, and the straightening plate moves toward the housing assembly driven by the adjusting nut until the extension plate abuts against the housing assembly. Continue to tighten the adjusting nut, and the straightening plate moves accordingly and pushes the housing assembly to move through the extension plate.

6. The method for correcting a large machine housing machined on a boring machine according to claim 1, characterized in that: The reference surface of the correction platform is provided with multiple fixed threaded holes.

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