CN121552017B - Processing method of partition board sleeve - Google Patents
Processing method of partition board sleeveInfo
- Publication number
- CN121552017B CN121552017B CN202610098703.5A CN202610098703A CN121552017B CN 121552017 B CN121552017 B CN 121552017B CN 202610098703 A CN202610098703 A CN 202610098703A CN 121552017 B CN121552017 B CN 121552017B
- Authority
- CN
- China
- Prior art keywords
- finishing
- block
- critical
- key
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
本发明属于隔板套生产技术领域，尤其是一种隔板套加工方法，包括以下步骤：S1、根据对隔板套性能的影响程度，将隔板套的待加工面分为关键面和非关键面；S2、对关键面和非关键面进行粗加工和半精加工，半精加工后，关键面预留的精加工余量为0.8‑1mm，非关键面预留的精加工余量为1.5‑4mm；S3、对关键面进行无损检测，对检测到的缺陷进行修复，直到关键面的质量满足要求；S4、将关键面和非关键面精加工至设计尺寸。本发明减少精加工余量，特别是关键面的精加工余量大幅度减少，在半精加工阶段即可发现大部分铸造缺陷，不影响精加工进度，精加工后缺陷显著减少，仅剩局部少量缺陷，整体质量可控性提高，产品质量得到提升。
This invention belongs to the field of partition sleeve manufacturing technology, specifically a partition sleeve processing method, comprising the following steps: S1, dividing the surfaces to be processed into critical surfaces and non-critical surfaces according to their degree of influence on the performance of the partition sleeve; S2, performing rough machining and semi-finishing on the critical and non-critical surfaces. After semi-finishing, the finishing allowance reserved for the critical surfaces is 0.8-1mm, and the finishing allowance reserved for the non-critical surfaces is 1.5-4mm; S3, performing non-destructive testing on the critical surfaces, repairing any defects detected until the quality of the critical surfaces meets the requirements; S4, finishing the critical and non-critical surfaces to the design dimensions. This invention reduces the finishing allowance, especially significantly reducing the finishing allowance for the critical surfaces. Most casting defects can be detected in the semi-finishing stage without affecting the finishing progress. After finishing, defects are significantly reduced, leaving only a small number of local defects, improving overall quality controllability and enhancing product quality.
Description
Technical Field
The invention belongs to the technical field of production of a separator sleeve, and particularly relates to a method for processing the separator sleeve.
Background
The steam turbine diaphragm sleeve is made of ZG15CrMoA alloy castings, and can be put into use only after rough machining, semi-finishing and finishing. In the traditional processing technology, 5mm finish allowance is reserved on a single side after semi-finish machining, casting defects (such as sand holes, air holes, slag inclusion and the like) are covered by excessively thick materials, so that the casting defects are not completely exposed, the casting defects are found out only in the later finish machining, the machine is required to be stopped, the defects of a workpiece and repair welding are eliminated, the delivery cycle is influenced, the production cost is increased, the unit credit is influenced, and the quality risk is large.
Disclosure of Invention
The invention aims to solve the technical problem of providing a processing method of a partition board sleeve, which shortens the whole manufacturing period and reduces the quality risk.
In order to solve the problems, the technical scheme adopted by the invention is that the processing method of the baffle plate sleeve comprises the following steps:
s1, dividing a surface to be processed of the separator sleeve into a key surface and a non-key surface according to the influence degree on the performance of the separator sleeve;
S2, rough machining and semi-finishing are carried out on the key surface and the non-key surface, after semi-finishing, the reserved finishing allowance of the key surface is 0.8-1mm, and the reserved finishing allowance of the non-key surface is 1.5-4mm;
S3, carrying out nondestructive testing on the key surface, and repairing the detected defect until the quality of the key surface meets the requirement;
and S4, finishing the critical surface and the non-critical surface to the design size.
Further, in step S2, during semi-finishing, the critical surface is firstly processed and whether the critical surface has defects is monitored in real time, then the non-critical surface is processed, if the critical surface has obvious defects, the finishing allowance reserved for the non-critical surface is 3-4mm, and if the critical surface does not have obvious defects, the finishing allowance reserved for the non-critical surface is 1.5-2mm.
Further, in step S3, repairing the detected defect includes performing excavation, grinding, preheating, repair welding and post-welding heat treatment on the defect.
Further, during preheating, the inner wall of the pit and the base material area within the range of at least 50mm around are heated to 150-250 ℃, after preheating, an electric blanket or heat preservation cotton is immediately adopted to wrap the preheating area for heat preservation, and a thermal infrared imager is utilized to monitor the uniformity of a temperature field in real time, so that no low-temperature dead angle is ensured.
Further, the pit after the defect is excavated is sequentially provided with a spherical pit, a first step and a second step from bottom to top, the first step and the second step are in transitional connection through a first curved surface, and the second step and the surface of the base material are in transitional connection through a second curved surface;
the repair welding process comprises the following steps:
the welding gun is perpendicular to the surface of the base material, spiral ascending filling is carried out on the spherical pit, and when the filling is close to the first step, the welding gun carries out transverse zigzag swinging filling until the part below the first step is filled;
Forced cooling and hammering are carried out on the filling layer below the first step;
The welding gun performs transverse zigzag swing filling until the part below the second step is filled;
Forced cooling and hammering are carried out on the filling layer below the second step;
the welding gun performs transverse zigzag swing filling until the whole pit is filled;
and cooling and hammering the filling layer in the whole pit strongly.
Further, the widths of the first step and the second step are larger than or equal to 5mm, the vertical distance from the first step to the center of the spherical pit is 3-5mm, the vertical distance between the first step and the second step is 3-5mm, the vertical distance between the second step and the surface of the base material is 3-5mm, and the radiuses of the spherical pit, the first curved surface and the second curved surface are larger than or equal to 5mm.
Further, the ultra-low hydrogen type R307 welding rod is adopted, is dried for 1-2 hours at 350-400 ℃, and is stored in a storage container at 100-150 ℃ and is taken along with use.
In step S2, semi-finishing is carried out by adopting a vertical lathe, wherein 4 sliding tables and a plurality of supporting columns are arranged on a working table surface of the vertical lathe, the sliding tables are in sliding fit with the working table surface in the radial direction, a positioning block is arranged on each sliding table, the positioning block is connected with a clamping force applying mechanism, the upper surface of the positioning block is provided with a supporting block, the side wall of the supporting block, which faces the center of the working table surface, is provided with a pressure sensor, the side wall of the pressure sensor, which faces the center of the working table surface, is provided with a clamping block, the side wall of the clamping block is fixedly provided with a plurality of studs, and the studs penetrate through the supporting block and are connected with locking nuts;
the partition board sleeve is horizontally arranged on the support column, and the clamping force applying mechanism drives the support block to radially move, so that the clamping block clamps the bottom of the outer circumferential surface of the partition board sleeve;
when the key surface is semi-finished, the pressure sensor is used for monitoring the clamping force, the triaxial acceleration sensor is used for monitoring the vibration of the clamping block, and whether the turning tool reaches the defect position is judged according to the clamping force and the vibration variation amplitude.
Further, the clamping block comprises a fixed block and a movable block, the stud is arranged on the side wall of the fixed block, which faces the center of the working table, is an arc surface coaxial with the working table, a chute is arranged on the arc surface, a sliding block is arranged in the chute, the sliding block is fixedly connected with the movable block, the movable block is in sliding fit with the arc surface, and the triaxial acceleration sensor is arranged on the movable block.
The invention has the beneficial effects that 1, the finishing allowance is reduced, particularly the finishing allowance of a key surface is greatly reduced, most casting defects can be found in a semi-finishing stage, the finishing progress is not influenced, the defects are obviously reduced after finishing, only a small number of defects remain, the overall quality controllability is improved, and the product quality is improved.
2. The key surfaces on the spacer sleeve generally comprise radial steam covers, axial sealing surfaces, outer circle supporting surfaces, end positioning surfaces and the like, and the surfaces corresponding to the key surfaces are generally non-key surfaces, such as outer circumferential surfaces corresponding to the radial steam covers, inner circumferential surfaces corresponding to the outer circle supporting surfaces, outer circumferential surfaces corresponding to the axial sealing surfaces, end surfaces corresponding to the end positioning surfaces or stepped surfaces and the like. During repair welding, a large amount of heat input with high concentration is needed, so that the base metal is locally heated and expanded and is restrained by surrounding cold metal to generate compression plastic deformation, and the base metal is contracted and restrained during cooling to generate unrecoverable tensile stress and deformation, and if the deformation is larger than the finishing allowance, the size of the finished partition sleeve cannot reach the standard. Therefore, the invention reserves enough machining allowance on the non-critical surface, provides insurance for unpredictable welding deformation of the critical surface, can cut off the deformed part by finish machining when the deformation is large during repair welding of the critical surface, and compensates the cut part of the critical surface by utilizing the reserved machining allowance of the non-critical surface so as to ensure the dimensional accuracy of the whole partition sleeve.
Drawings
FIG. 1 is a schematic flow chart of the present invention;
FIG. 2 is a schematic illustration of the division of critical and non-critical surfaces on a spacer sleeve;
FIG. 3 is a schematic view of a pit after defect removal;
FIG. 4 is a semi-finished schematic;
FIG. 5 is an enlarged schematic view of portion A of FIG. 4;
FIG. 6 is a schematic cross-sectional view of A-A in FIG. 5;
The reference numerals comprise 1-spherical pit, 2-first step, 3-first curved surface, 4-second step, 5-base material surface, 6-second curved surface, 10-working table, 11-sliding table, 12-supporting column, 13-positioning block, 15-clamping force applying mechanism, 16-supporting block, 17-pressure sensor, 18-clamping block, 181-fixed block, 182-movable block, 183-sliding block, 19-stud, 110-locking nut and 111-triaxial acceleration sensor.
Detailed Description
The invention will be further described with reference to the drawings and examples.
The processing method of the baffle plate sleeve of the invention, as shown in figure 1, comprises the following steps:
S1, dividing the surface to be processed of the separator sleeve into a key surface and a non-key surface according to the influence degree on the performance of the separator sleeve. The key surface is usually a surface matched with other parts, such as a radial steam cover, an axial sealing surface, an outer circle supporting surface and an end positioning surface, as shown in fig. 2, the radial steam cover is a channel bottom surface positioned on the inner wall of the partition sleeve and is used for installing the partition, the axial sealing surface is an end surface of the partition sleeve and is in contact with an adjacent cylinder or the partition, the outer circle supporting surface is positioned on the outer wall of the partition sleeve and is matched with the cylinder and used for supporting the whole partition sleeve, and the end positioning surface is used for determining the axial position of the partition sleeve in the cylinder and preventing the partition sleeve from axially moving in a stringing way and is positioned on the step surface of the outer circle.
S2, carrying out rough machining and semi-finishing on the key surface and the non-key surface, wherein after semi-finishing, the reserved finishing allowance of the key surface is 0.8-1mm, and the reserved finishing allowance of the non-key surface is 1.5-4mm. By reducing the finishing allowance, particularly the finishing allowance of the key surface is greatly reduced, most casting defects can be found in the semi-finishing stage, so that the defects are treated in time, the defects are obviously reduced after finishing, only a small number of defects remain, the finishing progress is not influenced, the overall quality controllability is improved, and the product quality is improved.
S3, carrying out nondestructive testing on the key surface, and repairing the detected defect until the quality of the key surface meets the requirement. Repairing the detected defects includes digging out the defects, polishing, preheating, repair welding and post-welding heat treatment. When preheating, the inner wall of the pit and the base material area within the range of at least 50mm around are heated to 150-250 ℃, after preheating, an electric blanket or heat preservation cotton is immediately adopted to wrap the preheating area for heat preservation, and the thermal infrared imager is utilized to monitor the uniformity of a temperature field in real time, so that no low-temperature dead angle is ensured, the temperature difference in the repair welding process is reduced, and the welding stress and deformation are reduced.
And S4, finishing the critical surface and the non-critical surface to the design size.
During repair welding, a large amount of heat input with high concentration is needed, so that the base metal is locally heated and expanded and is restrained by surrounding cold metal to generate compression plastic deformation, and the base metal is contracted and restrained during cooling to generate unrecoverable tensile stress and deformation, and if the deformation is larger than the finishing allowance, the size of the finished partition sleeve cannot reach the standard. In addition, the critical surface deformation may also cause adjacent non-critical surfaces to deform. As shown in fig. 2, the outer circumferential surface corresponding to the radial steam cover, the inner circumferential surface corresponding to the outer circumferential supporting surface, the outer circumferential surface corresponding to the axial sealing surface, the end surface corresponding to the end positioning surface, the stepped surface and the like are usually non-critical surfaces, and the invention reserves enough machining allowance on the non-critical surfaces to provide insurance for unpredictable welding deformation of the critical surfaces, and when the deformation is large during repair welding of the critical surfaces, the deformed parts can be cut off by finish machining, and the reserved machining allowance of the non-critical surfaces is utilized to compensate the cut-off parts of the critical surfaces, so that the dimensional accuracy of the whole partition plate sleeve is ensured.
The invention can ensure the processing quality of the key surface preferentially, further ensure the integral performance of the separator sleeve, and can reduce deformation by adopting a lower-standard repairing mode if casting defects occur during finish machining of the non-key surface.
When the key surface is obviously defective, the non-key surface needs to reserve more finishing allowance to ensure the final dimensional accuracy, and when the key surface is not obviously displayed, the finishing allowance of the non-key surface can be reduced, the finishing amount of finishing is reduced, and the finishing efficiency is improved. In order to flexibly determine the finishing allowance of the non-critical surface during semi-finishing, in the step S2 of the invention, the critical surface is firstly processed and whether the critical surface has defects is monitored in real time during semi-finishing, then the non-critical surface is processed, the finishing allowance reserved for the non-critical surface is 3-4mm if the critical surface has obvious defects, and the finishing allowance reserved for the non-critical surface is 1.5-2mm if the critical surface has no obvious defects.
By monitoring the critical surface in real time, whether defects exist or not can be initially known, when the defects exist, the non-critical surface is finished and processed, more finishing allowance is reserved for the non-critical surface, if the defects do not exist, the finishing allowance of the non-critical surface is reduced, the finishing efficiency of the non-critical surface can be improved, and casting defects possibly existing on the non-critical surface can be timely found.
The pit after the defect is excavated can be a conventional spherical pit, a trapezoid pit and the like, in order to improve repair welding quality and reduce deformation, the pit after the defect is excavated is sequentially a spherical pit 1, a first step 2 and a second step 4 from bottom to top, the first step 2 and the second step 4 are in transitional connection through a first curved surface 3, and the second step 4 and a base material surface 5 are in transitional connection through a second curved surface 6. Specifically, the widths of the first step 2 and the second step 4 are greater than or equal to 5mm, the vertical distance from the first step 2 to the center of the spherical pit 1 is 3-5mm, the vertical distance between the first step 2 and the second step 4 is 3-5mm, the vertical distance between the second step 4 and the base material surface 5 is 3-5mm, and the radii of the spherical pit 1, the first curved surface 3 and the second curved surface 6 are greater than or equal to 5mm.
The spherical pit 1 is in a spherical shape, replaces the traditional flat bottom or sharp bottom, has optimal stress distribution, and provides uniform cladding space for subsequent surfacing filling. Two layers of steps are designed, so that clear positioning and height reference planes are provided for vision in the welding process, and the thickness of each welding layer is accurately controlled. The stress concentration points can be eliminated by curved surface transition between the second step 4 and the base material surface 5 and between the first step 2 and the second step 4.
When the defect is removed, a plurality of milling cutters can be adopted to sequentially cut, so that a spherical pit 1, a first step 2, a first curved surface 3, a second step 4 and a second curved surface 6 are formed.
The repair welding process comprises the following steps:
The welding gun is perpendicular to the surface of the base material, and performs spiral ascending filling in the spherical pit 1, and when the filling is close to the first step 2, specifically, when the distance from the surface of the filling layer to the first step is about 2mm, the welding gun performs transverse zigzag swinging filling until the part below the first step 2 is filled. The filling mode can ensure the filling uniformity of the welding material.
Forced cooling and hammering are carried out on the filling layer below the first step 2;
the welding gun performs transverse zigzag swing filling until the part below the second step 4 is filled;
forced cooling and hammering are carried out on the filling layer below the second step 4;
the welding gun performs transverse zigzag swing filling until the whole pit is filled;
and (5) forcibly cooling and hammering the filling layer in the whole pit.
When one layer of welding is finished, forced cooling is immediately carried out, namely the temperature of a welding bead is quickly reduced to a preset target value, the interlayer temperature can be prevented from being too high, the range of a heat affected zone is reduced, and excessive growth of welding bead metal and HAZ grains is avoided. Forced cooling can be achieved by compressed air cooling.
After solidification and cooling of the weld, strong tensile residual stress is generated in the center of the weld, and the tensile residual stress can lead to cold cracking and stress corrosion. By hammering the weld layer, the weld layer metal is stretched, plastic deformation occurs, and the deformation partially counteracts the internal shrinkage strain, thereby significantly reducing longitudinal and transverse weld tensile stresses, and even generating beneficial compressive stresses in the surface layer, and correcting the weld deformation.
During welding, an ultralow-hydrogen type R307 welding rod is adopted, is dried for 1-2 hours at 350-400 ℃, and is stored in a storage container at 100-150 ℃ and is taken at any time, so that the welding quality is ensured.
At present, various modes for detecting casting defects exist, such as eddy current induced on the surface layer of a workpiece by using an alternating magnetic field, the defects can disturb the eddy current and cause impedance or voltage change of a detection coil, a high-resolution industrial camera and a multi-angle light source are used for acquiring images of the surface of the workpiece, ultrasonic detection, industrial CT scanning and the like. In the step S3, nondestructive detection can be directly performed on the key surface by adopting the mode, but the detection equipment is integrated on a processing machine tool to be difficult to implement in order to monitor whether casting defects appear on the key surface during semi-finishing.
In order to monitor whether the processed surface has defects more conveniently, in step S2, semi-finishing is performed by using a vertical lathe, and the partition plate sleeve is a large-sized disc part, and is usually processed by using the vertical lathe. As shown in fig. 4 to 6, 4 sliding tables 11 and a plurality of support columns 12 are arranged on the working table 10 of the vertical lathe, the sliding tables 11 and the working table 10 are in sliding fit in the radial direction, and the radial positions of the sliding tables 11 can be adjusted. Each sliding table 11 is provided with a positioning block 13. The upper surface of the positioning block 13 is provided with a supporting block 16, the side wall of the supporting block 16 facing the center of the working table surface 10 is provided with a pressure sensor 17, the side wall of the pressure sensor 17 facing the center of the working table surface 10 is provided with a clamping block 18, the side wall of the clamping block 18 is fixedly provided with a plurality of studs 19, the studs 19 penetrate through the supporting block 16 and are connected with a locking nut 110, and the clamping block 18 is provided with a triaxial acceleration sensor 111.
The positioning block 13 is connected with a clamping force applying mechanism 15, and the clamping force applying mechanism 15 can provide radial thrust, so that the clamping block 18 on the positioning block 13 can clamp the outer circle of the baffle sleeve. The clamping force applying mechanism 15 may be a hydraulic cylinder or the like, and is mounted on the table top 10 and connected with the sliding table 11, directly pushes the sliding table 11 to move radially and provide clamping force, and the positioning block 13 is fixed on the sliding table 11. In addition, the locating block 13 can be in sliding fit with the sliding table 11, the clamping force applying mechanism 15 can be an adjusting bolt, the adjusting bolt is in threaded fit with the locating block 13, the adjusting bolt is rotatably arranged on the sliding table 11, the locating block 13 can be pushed to move by rotating the adjusting bolt, and the sliding table 11 can be locked and fixed on the working table 10 through the locating screw.
The pressure sensor 17 can detect the pressure between the clamping block 18 and the supporting block 16, the pressure sensor 17 detects the initial installation pressure between the supporting block 16 and the clamping block 18 after the clamping block 18 is installed on the supporting block 16, and when the clamping block 18 clamps the separator sleeve, the pressure sensor 17 can detect the clamping force of the clamping block 18 to the separator sleeve.
During clamping, the partition board sleeves are horizontally arranged on each support column 12, and the support columns 12 support the bottom surfaces of the partition board sleeves. After the partition board sleeve is adjusted to be coaxial with the workbench surface 10, the clamping force applying mechanism 15 drives the positioning block 13 and the supporting block 16 and the clamping block 18 on the positioning block 13 to integrally and radially move, so that the clamping block 18 clamps the bottom of the outer circumferential surface of the partition board sleeve.
When the key surface is semi-finished, the pressure sensor 17 is used for monitoring the clamping force, the triaxial acceleration sensor 111 is used for monitoring the vibration of the clamping block 18, and whether the turning tool reaches the defect position is judged according to the clamping force and the vibration variation amplitude.
When the processed surface has no defect, the turning tool can stably cut, and the cutting force and the vibration of the baffle plate sleeve are stable. When the machined surface has casting defect, the cutting force will change greatly when the cutter reaches the defect, for example, when the cutter encounters air holes and sand holes, the cutting edge will lose material support instantaneously, the cutting force will drop suddenly, when the cutter cuts out the defect and cuts into sound material again, the cutting force will rise sharply, the whole process will be completed within millisecond, and when the cutter encounters cracks or hard particles, the cutting force rises and then drops suddenly. In addition, imperfections can cause significant vibration anomalies in the turning tool and spacer sleeve.
In the invention, the clamping force of the clamping blocks 18 on the 4 sliding tables 11 to the baffle plate sleeve is detected by the pressure sensor 17, and in an ideal rigid system, the clamping force is constant, but in reality, a workpiece, a clamp and a turning tool are elastic systems, when the cutting force changes, the system can generate tiny elastic deformation, the load distribution of each clamping block 18 is changed, namely the clamping force changes, and the pressure sensor 17 can detect the change. When the spacer sleeve clamping is completed but not turned, the clamping force of each clamping block 18 is balanced, the system is in static balance, and when the cutting force of the turning tool acts on the workpiece, the workpiece has a tiny displacement or rotation trend for resisting the cutting force, the trend leads to the change of contact pressure and microscopic clearance between the workpiece and each clamping block 18, the pressure of part of the clamping points can be increased (part of the cutting force is shared), and the part of the clamping points can be reduced (even the instantaneous micro-separation trend occurs). When the cutting surface of the baffle plate sleeve is defect-free, the material is uniform and sound, the cutting force is stable, the clamping force presents stable and periodical tiny fluctuation along with the change of the cutting depth and the feeding rule of the turning tool, the fluctuation frequency is consistent with the main frequency of the cutting force, and the signal change rule and the coordination of each clamping point are realized. When the turning tool encounters a defect, if the cutting force suddenly decreases, the spacer sleeve which is originally compressed has a rebound tendency, and if the cutting force suddenly increases, the spacer sleeve has a further displacement or rotation tendency, which can cause abrupt changes in the clamping force of each clamping block 18. It can be preliminarily determined whether the turning tool encounters a defect or not based on the detection results of the respective pressure sensors 17.
Meanwhile, when the lathe tool encounters a defect, irregular vibration is generated on the partition plate sleeve, the original stable vibration amplitude and vibration frequency are broken, and the vibration of the partition plate sleeve is transmitted to the clamping block 18, so that the vibration frequency and the vibration amplitude of the clamping block 18 are detected through the triaxial acceleration sensor 111, and when the vibration frequency and the vibration amplitude of the clamping block 18 suddenly change greatly, the lathe tool is indicated to encounter a welding defect.
If the abrupt change of the pressure value is detected by the pressure sensor 17 and the abrupt change of the vibration frequency and the vibration amplitude of the clamping block 18 is detected, it can be considered that the turning tool encounters a welding defect. If no abrupt change occurs in the detection values of the pressure sensor 17 and the triaxial acceleration sensor 111 during turning of a certain key surface, it is considered that no defect exists on the key surface.
The vibration amplitude of the baffle plate sleeve is smaller, so that the vibration amplitude of the clamping block 18 is smaller, in order to more clearly detect abnormal vibration, the clamping block 18 comprises a fixed block 181 and a movable block 182, a stud 19 is arranged on the side wall of the fixed block 181, the side wall of the fixed block 181 facing the center of the working table top 10 is a cambered surface coaxial with the working table top 10, a sliding groove is formed in the cambered surface, a sliding block 183 is arranged in the sliding groove, the sliding block 183 can slide in the sliding groove, the sliding distance of the sliding block 183 can slide back and forth is about 2mm, the sliding block 183 is fixedly connected with the movable block 182, and the movable block 182 can be driven to synchronously move when the sliding block 183 slides. The movable block 182 is slidably engaged with the arc surface, and the triaxial acceleration sensor 111 is mounted on the movable block 182.
During clamping, the sliding block 183 is located at the middle position of the sliding groove, namely, the sliding block 183 can slide by about 1mm in two directions along the sliding groove. Elastic gaskets can be arranged in the sliding grooves at the two ends of the sliding block 183, so that the sliding block 183 is always positioned in the middle of the sliding groove when not clamped. After the spacer sleeve is clamped by the movable block 182, turning is started. During normal turning, the diaphragm sleeve vibrates slightly in amplitude, and the movable block 182 remains stationary relative to the fixed block 181. When the turning tool encounters a defect, a high-frequency and high-amplitude cutting force impact pulse is instantaneously generated, the impact pulse force mainly comprises radial (the depth of a knife) and tangential (the cutting speed) components, the impact pulse is transmitted to the movable block 182 in the form of stress waves, the tangential component of the impact pulse generates instantaneous tangential thrust to the movable block 182, the tangential thrust overcomes system resistance and inertia, the movable block 182 is driven to do a rapid back and forth shaking motion, thereby generating clear shaking signals, the shaking amplitude is usually between tens of micrometers and hundreds of micrometers, and the triaxial acceleration sensor 111 can accurately detect the shaking.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The processing method of the separator sleeve is characterized by comprising the following steps of:
S1, dividing a surface to be processed of the partition plate sleeve into a key surface and a non-key surface according to the influence degree on the performance of the partition plate sleeve, wherein the key surface is a radial steam cover, an axial sealing surface, an outer circle supporting surface and an end positioning surface, and the non-key surface is an outer circle circumferential surface corresponding to the radial steam cover, an inner circle circumferential surface corresponding to the outer circle supporting surface, an outer circle circumferential surface corresponding to the axial sealing surface, an end surface corresponding to the end positioning surface or a step surface;
S2, rough machining and semi-finishing are carried out on the key surface and the non-key surface, after semi-finishing, the reserved finishing allowance of the key surface is 0.8-1mm, and the reserved finishing allowance of the non-key surface is 1.5-4mm;
During semi-finishing, firstly processing a critical surface and monitoring whether the critical surface has defects in real time, then processing a non-critical surface, wherein if the critical surface has obvious defects, the reserved finishing allowance of the non-critical surface is 3-4mm, and if the critical surface does not have obvious defects, the reserved finishing allowance of the non-critical surface is 1.5-2mm;
S3, carrying out nondestructive testing on the key surface, and repairing the detected defect until the quality of the key surface meets the requirement;
repairing the detected defects, including digging, polishing, preheating, repair welding and post-welding heat treatment;
The pit after the defect is excavated is sequentially provided with a spherical pit (1), a first step (2) and a second step (4) from bottom to top, the first step (2) and the second step (4) are in transitional connection through a first curved surface (3), and the second step (4) and the surface (5) of the base material are in transitional connection through a second curved surface (6);
the repair welding process comprises the following steps:
the welding gun is perpendicular to the surface of the base material, spiral ascending filling is carried out on the spherical pit (1), and when the filling is close to the first step (2), the welding gun carries out transverse zigzag swinging filling until the part below the first step (2) is filled;
Forced cooling and hammering are carried out on the filling layer below the first step (2);
the welding gun performs transverse zigzag swing filling until the part below the second step (4) is filled;
forced cooling and hammering are carried out on the filling layer below the second step (4);
the welding gun performs transverse zigzag swing filling until the whole pit is filled;
Strongly cooling and hammering the filling layer in the whole pit;
and S4, finishing the critical surface and the non-critical surface to the design size.
2. The method for processing the partition board sleeve according to claim 1, wherein the base material area in the range of at least 50mm on the inner wall and the periphery of the pit is heated to 150-250 ℃ during preheating, and after preheating, an electric blanket or heat-insulating cotton is immediately adopted to wrap and insulate the preheated area, and a thermal infrared imager is used for monitoring the uniformity of a temperature field in real time, so that no low-temperature dead angle is ensured.
3. The method for processing the spacer bush according to claim 1, wherein the widths of the first step (2) and the second step (4) are greater than or equal to 5mm, the vertical distance from the first step (2) to the center of the spherical pit (1) is 3-5mm, the vertical distance between the first step (2) and the second step (4) is 3-5mm, the vertical distance between the second step (4) and the base material surface (5) is 3-5mm, and the radii of the spherical pit (1), the first curved surface (3) and the second curved surface (6) are greater than or equal to 5mm.
4. The method for manufacturing a separator according to claim 1, wherein the ultra-low hydrogen type R307 welding rod is used, baked for 1-2 hours at 350-400 ℃ and stored in a storage container at 100-150 ℃ and taken as it is.
5. The baffle plate sleeve processing method according to claim 1, characterized in that in the step S2, a vertical lathe is adopted for semi-finishing, 4 sliding tables (11) and a plurality of supporting columns (12) are arranged on a working table surface (10) of the vertical lathe, the sliding tables (11) are in sliding fit with the working table surface (10) in the radial direction, a positioning block (13) is arranged on each sliding table (11), the positioning block (13) is connected with a clamping force applying mechanism (15), a supporting block (16) is arranged on the upper surface of the positioning block (13), a pressure sensor (17) is arranged on the side wall of the supporting block (16) facing the center of the working table surface (10), a clamping block (18) is arranged on the side wall of the pressure sensor (17) facing the center of the working table surface (10), a plurality of studs (19) are fixedly arranged on the side wall of the clamping block (18), the studs (19) penetrate through the supporting block (16) and are connected with locking nuts (110), and a triaxial acceleration sensor (111) is arranged on the clamping block (18).
The partition board sleeve is horizontally arranged on the support column (12), and the clamping force applying mechanism (15) drives the support block (16) to move radially, so that the clamping block (18) clamps the bottom of the outer circumferential surface of the partition board sleeve;
When the key surface is semi-finished, the clamping force is monitored by using the pressure sensor (17), meanwhile, the vibration of the clamping block (18) is monitored by using the triaxial acceleration sensor (111), and whether the turning tool reaches the defect position is judged according to the clamping force and the vibration variation amplitude.
6. The method for processing the partition board sleeve according to claim 5, wherein the clamping block (18) comprises a fixed block (181) and a movable block (182), the stud (19) is arranged on the side wall of the fixed block (181), the side wall of the fixed block (181) facing the center of the working table surface (10) is an arc surface coaxial with the working table surface (10), a chute is arranged on the arc surface, a sliding block (183) is arranged in the chute, the sliding block (183) is fixedly connected with the movable block (182), the movable block (182) is in sliding fit with the arc surface, and the triaxial acceleration sensor (111) is arranged on the movable block (182).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202610098703.5A CN121552017B (en) | 2026-01-26 | 2026-01-26 | Processing method of partition board sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202610098703.5A CN121552017B (en) | 2026-01-26 | 2026-01-26 | Processing method of partition board sleeve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN121552017A CN121552017A (en) | 2026-02-24 |
| CN121552017B true CN121552017B (en) | 2026-04-17 |
Family
ID=98804474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202610098703.5A Active CN121552017B (en) | 2026-01-26 | 2026-01-26 | Processing method of partition board sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN121552017B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH686878A5 (en) * | 1993-02-18 | 1996-07-31 | Starrfrosmaschinen Ag | Method and appts. for machining blower blades |
| CN104384825A (en) * | 2014-08-01 | 2015-03-04 | 中国人民解放军第五七一九工厂 | Machining deformation control method of bushing thin-wall part |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19753116C1 (en) * | 1997-11-29 | 1999-07-08 | Actech Gmbh Adv Casting Tech | Bainitic hardened brake disc |
| CN203629795U (en) * | 2013-10-12 | 2014-06-04 | 万向钱潮股份有限公司 | Novel PV test detection device |
| CN105945437B (en) * | 2016-05-31 | 2018-06-22 | 共享铸钢有限公司 | A kind of faults repair method after low-alloy cast steel part finishing |
| CN112935715B (en) * | 2021-01-29 | 2022-03-29 | 江南工业集团有限公司 | Machining manufacturing method for airplane wheel hub |
| CN116276099A (en) * | 2022-12-05 | 2023-06-23 | 天津大学 | A dual-robot intelligent collaborative processing system and method for large castings |
| CN119289828A (en) * | 2024-10-18 | 2025-01-10 | 哈尔滨汽轮机厂有限责任公司 | A method for measuring flow through assembly of thermal power steam turbine |
| CN120080115A (en) * | 2025-01-21 | 2025-06-03 | 沈阳透平机械股份有限公司 | A high plasticity comb tooth seal processing method and processing tool and fixture thereof |
-
2026
- 2026-01-26 CN CN202610098703.5A patent/CN121552017B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH686878A5 (en) * | 1993-02-18 | 1996-07-31 | Starrfrosmaschinen Ag | Method and appts. for machining blower blades |
| CN104384825A (en) * | 2014-08-01 | 2015-03-04 | 中国人民解放军第五七一九工厂 | Machining deformation control method of bushing thin-wall part |
Also Published As
| Publication number | Publication date |
|---|---|
| CN121552017A (en) | 2026-02-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100718574B1 (en) | Apparatus and method for forming weld joints having compressive residual stress patterns | |
| Field et al. | Surface finish and surface integrity | |
| US20030120374A1 (en) | Method for Producing a Bore | |
| CN114054813B (en) | Machining method for large-size thin-wall special-shaped cover body | |
| CN110449848B (en) | Processing technology for overlaying stellite hard alloy thin-wall sleeve | |
| US8245375B2 (en) | Apparatus for repairing turbine rotor | |
| CN110625628A (en) | Method and device for removing nondestructive testing defects of large steel castings | |
| CN121552017B (en) | Processing method of partition board sleeve | |
| CN115007920B (en) | A precision milling method for the outer wall of thin-walled nickel-based alloy workpieces | |
| CN218983317U (en) | CNC cylinder work piece compresses tightly and mills rotatory tray device of location | |
| KR102036980B1 (en) | A Method for Predicting Tool Wear Overlap Geometry | |
| CN110744560B (en) | Steel casting surface robot cutting device meeting NDT flaw detection requirement | |
| CN112355576B (en) | Machining method for high-precision wing-shaped elastic shaft part | |
| CN102489933A (en) | Shield sealing contact surface restoring method | |
| US6973367B2 (en) | Method for producing a bore | |
| CN115255835A (en) | Propeller production process and production line | |
| CN105921776A (en) | Method to make standard surface roughness by boring aluminum alloy | |
| JP3687324B2 (en) | Cylinder bore high-precision fine groove machining apparatus and machining method | |
| CN113523718B (en) | Manufacturing process of nuclear main pump bearing guide ring key groove of nuclear power station | |
| Balasubramanian et al. | Novel fatigue tester for additively manufactured metals | |
| CN115008121B (en) | A method for reworking, repairing and remanufacturing of an engine connecting rod | |
| CN116571966B (en) | Processing method for reducing surface roughness of pump hub of hydraulic torque converter | |
| Li et al. | Residual stress and fatigue properties of AISI H13 steel by sustainable dry milling | |
| Patil et al. | Design and Development of Honing Tool | |
| Wedderbum | Development of a creep sample retrieval technique and friction weld site repair procedure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |