A multi-point flexible inner-outer type vibration straightening device for large thin-wall ring parts

Abstract

A kind of large thin-walled ring piece multi-point flexible inner and outer shape vibration straightening device, including straightening vibration platform (1), outer pasting straightening arc block (2), outer support height movable adjusting block (3), adjustable eccentric exciter (4), inner pasting straightening arc block (5), inner support movable adjusting support rod (6), inner support support column (7), the large thin-walled ring piece (8) to be straightened is clamped and fixed on straightening vibration platform (1), be provided with multiple outer pasting straightening arc block and inner pasting straightening arc block, so that the working position of flexible adjusting device can be adjusted according to the different structural characteristics of large thin-walled ring piece, different deformation state, adjustable eccentric exciter is installed on straightening vibration platform, vibration of exciter is transmitted to large thin-walled ring piece by straightening vibration platform, realize the double straightening effect of vibration straightening and device straightening, effectively improve the combination straightening efficiency, so that the shape size stability of ring piece after straightening is better.

Description

TECHNICAL FIELD

[0001] The present application relates to a ring shape correcting device, in particular to a multi-point flexible inner and outer shape vibration correcting device for large thin-walled ring parts. BACKGROUND

[0002] With the development of lightweight, precision and integration of modern aerospace and aviation products, the demand for large thin-walled structural parts and the quality of processing are increasingly improved. More than 90% of the workpiece material is removed in the processing of such large thin-walled ring parts. At the same time, the blank of the forged (cast) part has a complex stress state after forming. The initial residual stress and the residual stress introduced by processing change, resulting in unpredictable deformation of the main process, uncontrolled quality risk of product processing, and serious impact on the delivery of aerospace product task nodes.

[0003] A shell product end face roundness vibration aging shape correcting device and method are disclosed in Chinese patent (CN104372168A). For the problem of end face roundness out-of-tolerance after welding and machining of the shell product, a single-rod two-way inner supporting circle type shape correcting device is used. After the short-axis end area of the product is deformed and the two ends are lifted and supported, the vibration exciter is installed on the product for vibration aging. Analysis of the shape correcting device of the patent shows that: (1) the shape correcting device adopts a two-way inner supporting circle method at the two ends of the deformed short axis, and no effective shape correcting measures are taken at the long axis end. Moreover, it is not suitable for products with local area deformation, and the device has low applicability. (2) The main feature of the deformation of the product part is large-scale and multi-area deformation. The shape correcting device has small coverage area, and cannot simultaneously correct the shape of large-scale and multi-area. The non-corrected area is prone to uncontrollable shape changes, and the shape correcting process has high risk and low controllability. (3) During the shape correcting process, the vibration exciter is installed on the shell product, which is prone to over-deformation of the product during vibration for large thin-walled ring parts with weak rigidity. (4) The vibration aging method mainly releases and reduces the residual stress of the workpiece, and the research and application of the deformation state of the workpiece after vibration aging are less. The vibration shape correcting device has not fully played the best effect of vibration shape correcting. It can be seen that the above vibration aging shape correcting device needs to be improved to enhance the shape correcting effect and better meet the shape precision design requirements of the workpiece product. SUMMARY

[0004] The purpose of the present application is to provide a large thin-walled ring piece multi-point flexible inner and outer type vibration shape correcting device, which realizes multi-point shape correction of the inner and outer of the workpiece, multi-region coverage, and flexible structure design of the shape correcting device, which can flexibly adjust the shape correcting support and rigidly clamp the constraint mode according to the structure characteristics and surface deformation state of different ring products; and the vibration treatment of the large thin-walled ring piece deformation law is obtained by ABAQUS simulation analysis, which guides the action position of the on-site vibration exciter clamping vibration shape correcting platform, so that the vibration shape correction and the multi-point flexible inner and outer type flexible shape correcting device greatly increase the shape correction efficiency, the product surface quality is controllable during the shape correction process, the internal stress distribution of the product after the shape correction is stable and uniform, and the product surface size precision meets the requirements.

[0005] The technical scheme adopted by the present application to achieve the purpose of the present application is a large thin-walled ring piece multi-point flexible inner and outer type vibration shape correcting device, characterized by:

[0006] It comprises a shape correcting vibration platform, an outer fitting shape correcting arc block, an outer support height movable adjusting block, an adjustable eccentric exciter, an inner fitting shape correcting arc block, an inner support movable adjusting support rod, and an inner support support column.

[0007] The large thin-walled ring piece is clamped and fixed on the shape correcting vibration platform, the inner surface of the large thin-walled ring piece is clamped and fixed by a pressing plate bolt and a pressing plate, and the outer surface is clamped and fixed by a long threaded rod and a pressing plate on the upper end surface of the large thin-walled ring piece.

[0008] The outer support height movable adjusting block is installed on the shape correcting vibration platform, the square bottom of the square bottom of the square bottom screw is matched with the annular sliding track on the shape correcting vibration platform, the outer support height movable adjusting block can freely slide according to the required shape correcting area of the outer shape of the large thin-walled ring piece, and is connected and fixed with the shape correcting vibration platform by using a gasket nut, an elongated pressing plate; the tight screw is connected and matched with the tight screw hole and the threaded tight screw hole on the outer support sliding support, so that the outer support sliding support is fixed on the outer support height movable adjusting block; the outer arc block adjusting bolt is threadedly connected with the threaded hole on the outer support sliding support, and is threadedly fixed with the outer fitting shape correcting arc block.

[0009] The middle column light rod of the inner support support column is connected with the middle connecting hole of the shape correcting vibration platform, and the column connecting bolt is threadedly connected and fixed with the threaded connecting hole, so that the inner support support column is rigidly connected with the shape correcting vibration platform; one end of the inner support movable adjusting support rod is connected to the inner support support column through a sleeve, and the other end is connected to the inner fitting shape correcting arc block; the inner support movable adjusting support rod is further provided with a support rod adjusting nut in the middle; a hexagonal tightening nut is arranged at the top of the inner support support column for tightening and fixing the inner support movable adjusting support rod.

[0010] The adjustable eccentric exciter is threadedly fixed on the shape correcting vibration platform by using an arc-shaped clamping block and a fixing bolt.

[0011] Compared with the prior art, the present application has the following advantages:

[0012] I. A multi-point, multi-zone, and large-area shaping device is adopted, a plurality of outer and inner fitting shaping arc blocks are arranged, the double shaping protection effect of outer hoop circle and inner support circle is realized, and over-deformation of the loading area or non-shaping area of the ring part during the shaping process is effectively prevented.

[0013] II. The outer support height movable adjusting block can slide along the annular sliding track of the shaping vibration platform, one end of the inner support movable adjusting support rod is connected to the inner support support column through a sleeve, the inner support movable adjusting support rod can be rotated to a suitable angle by rotating the sleeve, the shaping device can flexibly adjust the working position according to different structural characteristics and different deformation states of the large thin-walled ring part, and the local and overall shaping effects are realized.

[0014] III. The shaping process adopts a combination of the exciter vibration processing method and the shaping device, fully utilizes the vibration shaping deformation law, effectively improves the combination shaping efficiency, and effectively homogenizes the residual stress of the ring part during the shaping process, so that the dimensional stability of the shaped ring part is better, and the shaped ring part is effectively prevented from rebounding after the shaping device is unloaded.

[0015] IV. The large thin-walled ring part, especially the large thin-walled ring part used in aerospace, has the characteristics of large size and thinness, and is of annular structure. The exciter is not easy to clamp and fix on the annular part, and if the exciter is directly clamped on the ring part, the clamping force and the vibration force are easy to cause additional damage to the thin-walled ring part. Therefore, the exciter is installed on the shaping vibration platform in the present application, the vibration of the exciter is transmitted to the large thin-walled ring part through the shaping vibration platform, the clamping is convenient, the product structure characteristics are not restricted, and the product is effectively protected from over-deformation caused by direct clamping and vibration processing on the large thin-walled ring part, and the surface quality and the shape precision of the product are effectively protected.

[0016] Further, a plurality of threaded pin holes are arranged on the outer support height movable adjusting block.

[0017] Through the plurality of threaded pin holes, the positions of the outer support sliding support and the outer fitting shaping arc block can be adjusted up and down according to the height of the outer shape surface deformation area of the large thin-walled ring part.

[0018] Further, a plurality of height adjusting sleeves of different lengths can be sleeved on the inner support support column.

[0019] By using the height adjusting sleeves of different lengths, the positions of the inner support movable adjusting support rod and the inner fitting shaping arc block can be adjusted up and down according to the height of the inner shape surface deformation area of the large thin-walled ring part.

[0020] The application will be described in further detail below with reference to the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the assembly structure schematic diagram of the clamping structure of the vibration straightening device for large thin-walled ring pieces of the application.

[0022] Figure 2 is the assembly structure schematic diagram of the clamping structure assembly of the application.

[0023] Figure 3 is the three-dimensional structure schematic diagram of the inner shape straightening adjusting structure assembly of the application.

[0024] Figure 4 is the structure schematic diagram of the outer shape straightening hoop circular structure assembly of the application.

[0025] Figure 5 is the structure schematic diagram of the outer support sliding support of the application.

[0026] Figure 6 is the schematic diagram of the adjustable eccentric exciter and its clamping structure of the application.

[0027] Figure 7 is the three-dimensional structure schematic diagram of the inner shape straightening adjusting structure assembly with height adjusting sleeve of the application.

[0028] Figure 8 is the vibration processing simulation model and simulation result diagram of the large thin-walled ring piece of the application. DETAILED DESCRIPTION

[0029] Embodiment 1

[0030] Figures 1 to 6 It is shown that one specific embodiment of the application is a multi-point flexible inner and outer shape vibration straightening device for large thin-walled ring pieces, which comprises a straightening vibration platform 1, an outer adhering straightening arc block 2, an outer support height movable adjusting block 3, an adjustable eccentric exciter 4, an inner adhering straightening arc block 5, an inner support movable adjusting support rod 6, and an inner support support column 7.

[0031] The large thin-walled ring piece 8 is clamped and fixed on the straightening vibration platform 1, the inner type surface bottom of the large thin-walled ring piece 8 is clamped and fixed through the pressing plate bolt 9 and the pressing plate 10, and the outer type surface is clamped and fixed through the long threaded rod 11 and the pressing plate 10 on the upper end surface of the large thin-walled ring piece 8.

[0032] The outer support height movable adjusting block 3 is installed on the shaping vibration platform 1, the bottom surface square base 1901 of the square base screw 19 is matched with the annular sliding track 103 on the shaping vibration platform 1, the outer support height movable adjusting block 3 can be freely slid according to the required shaping area of the large thin-walled ring 8, and is connected and fixed with the shaping vibration platform 1 by using the gasket nut 20 and the long-shaped pressing plate 21; the tight pin screw 18 is connected and matched with the tight pin screw through hole 1602 on the outer support sliding support 16 and the threaded tight pin hole 301, so that the outer support sliding support 16 is fixed on the outer support height movable adjusting block 3; the outer arc block adjusting screw 17 is screw-connected with the threaded through hole 1601 on the outer support sliding support 16, and is screw-fastened with the outer fitting shaping arc block 2;

[0033] The light column 701 in the inner support support column 7 is matched and connected with the connecting through hole 102 in the shaping vibration platform 1, the column connecting screw 13 is screw-connected and fixed with the threaded connecting hole 101, so that the inner support support column 7 is rigidly and fixedly connected with the shaping vibration platform 1; one end of the inner support movable adjusting support rod 6 is connected to the inner support support column 7 through a sleeve, and the other end is connected to the inner fitting shaping arc block 5; the inner support movable adjusting support rod 6 is further provided with a support rod adjusting nut 15 in the middle part; the hexagonal tightening nut 12 is arranged at the top of the inner support support column 7 and is used for tightening and fixing the inner support movable adjusting support rod 6;

[0034] The adjustable eccentric exciter 4 is screw-fixed on the shaping vibration platform 1 by using the arc-shaped clamping block 22 and the fixing screw 23, and the specific installation position corresponds to the vicinity of the maximum deformation area of the large thin-walled ring 8; the vibration of the adjustable eccentric exciter 4 is transmitted to the large thin-walled ring 8 through the shaping vibration platform 1.

[0035] A plurality of groups of threaded tight pin holes 301 are arranged on the outer support height movable adjusting block 3.

[0036] In this example, the outer and inner fitting shape correction arc blocks 2 and 5 of corresponding sizes are matched according to the size of the required shape correction ring, so that the working surface of the shape correction arc block is in contact with the maximum fitting surface of the ring; the inner type adopts 8 shape correction areas on the upper and lower ends of the ring for inner support shape correction, the rotating sleeve drives the inner support movable adjusting strut 6 to rotate to the appropriate angle to support and correct the area with large deformation of the ring, the extension feed amount of the inner support movable adjusting strut 6 is gradually adjusted according to the deformation state of the ring, and the pushing force is maintained for a period of time, then the adjusting extension feed amount is increased, and the pushing force is maintained for a period of time. At the same time, the outer type adopts 12 areas in 6 directions on the circumference of the ring for outer hoop circle shape correction, for the area of the ring outward bulging deformation, the outer fitting shape correction arc block 2 is adjusted by the outer arc block adjusting bolt 17 to hoop inwardly to the ring, for the inward deformation area, the appropriate hoop feed amount is adjusted in cooperation with the inner support device to prevent the ring from being over-deformed due to the excessive inner support feed amount. Since the outer support height adjustable block 3 is provided with a plurality of threaded pin holes 301, the positions of the outer support sliding support 16 and the outer fitting shape correction arc block 2 can be adjusted up and down according to the height of the deformation area of the outer shape of the ring.

[0037] Example 2

[0038] Figure 1 、 Figure 2 , and Figures 4 to 7 It is shown that the second specific embodiment of the present application, in addition to the height adjusting sleeve 14 sleeved on the inner support support column 7, the rest of the structure is the same as the first specific embodiment.

[0039] By selecting height adjusting sleeves 14 of different lengths, the positions of the inner support movable adjusting strut 6 and the inner fitting shape correction arc block 5 can be adjusted up and down according to the height of the deformation area of the inner shape of the ring.

[0040] Figure 8It is shown that the ABAQUS software is used for vibration simulation analysis of the large thin-walled ring 8, in order to improve the calculation simulation rate and obtain more accurate simulation operation results, the shape vibration platform 1 and the large thin-walled ring 8 model are simplified, the periodic cyclic loading force is applied at the circumferentially symmetrical position of the shape vibration platform 1, the vibration time is 20 min, the displacement change cloud atlas of the large thin-walled ring 8 is obtained, the simulation results show that the strain change of the large thin-walled ring 8 near the vibration loading position area is more obvious, through analysis, it is found that during the vibration process, the external excitation transmits to the large thin-walled ring 8 in the form of energy wave, the area near the vibration loading position of the large thin-walled ring 8 absorbs the maximum energy, the stress change of this area is larger than that of other parts, the internal stress of the large thin-walled ring 8 is redistributed, the stress homogenization process leads to the size change of the surface of this area, and finally reaches a stable state. The adjustable eccentric exciter 4 is fixed on the shape vibration platform 1, the specific installation position corresponds to the area near the maximum deformation area of the large thin-walled ring 8, the vibration of the adjustable eccentric exciter 4 is transmitted to the large thin-walled ring 8 through the shape vibration platform 1, the double shaping effect of vibration shaping and device shaping is realized, and during the vibration process, the stress distribution in the large thin-walled ring 8 is redistributed and stabilized, which effectively avoids the springback deformation of the large thin-walled ring 8 after the shape correction device is disassembled.

Claims

1. A large thin-walled ring piece multi-point flexible inner and outer shape vibration straightening device, characterized in that: it comprises a straightening vibration platform (1), an outer fitting straightening arc block (2), an outer support height movable adjusting block (3), an adjustable eccentric exciter (4), an inner fitting straightening arc block (5), an inner support movable adjusting support rod (6), and an inner support support column (7); the large thin-walled ring piece (8) to be straightened is clamped and fixed on the straightening vibration platform (1), the inner surface of the large thin-walled ring piece (8) is clamped and fixed by a pressing plate bolt (9) and a pressing plate (10), and the outer surface is clamped and fixed by a long threaded rod (11) and the pressing plate (10) on the upper end surface of the large thin-walled ring piece (8); the outer support height movable adjusting block (3) is installed on the straightening vibration platform (1), the square bottom (1901) of the square bottom screw rod (19) is matched with the annular sliding track (103) on the straightening vibration platform (1), the outer support height movable adjusting block (3) can freely slide according to the required straightening area of the outer shape of the large thin-walled ring piece (8), and is fixed and connected with the straightening vibration platform (1) by using a gasket nut (20) and an elongated pressing plate (21); the tight nail screw (18) is connected and matched with the tight nail screw light hole (1602) and the threaded tight nail hole (301) on the outer support sliding support (16), so that the outer support sliding support (16) is fixed on the outer support height movable adjusting block (3); the outer arc block adjusting bolt (17) is threadedly connected with the threaded through hole (1601) on the outer support sliding support (16), and is threadedly fixed with the outer fitting straightening arc block (2); the middle column light rod (701) of the inner support support column (7) is matched and connected with the connecting through hole (102) in the straightening vibration platform (1), the column connecting bolt (13) is threadedly connected and fixed with the threaded connecting hole (101), so that the inner support support column (7) is rigidly connected with the straightening vibration platform (1); one end of the inner support movable adjusting support rod (6) is connected to the inner support support column (7) through a sleeve, the other end is connected to the inner fitting straightening arc block (5), and the middle part of the inner support movable adjusting support rod (6) is further provided with a support rod adjusting nut (15); the top of the inner support support column (7) is provided with a hexagonal tightening nut (12) for tightening the inner support movable adjusting support rod (6); the adjustable eccentric exciter (4) is threadedly fixed on the straightening vibration platform (1) by using an arc-shaped clamping block (22) and a fixing bolt (23). A plurality of threaded tight nail holes (301) are arranged on the outer support height movable adjusting block (3). A plurality of height adjusting sleeves (14) of different lengths can be sleeved on the inner support support column (7). ​ ​ ​ 2. The multi-point flexible internal and external profile vibration straightening device for large thin-walled ring parts according to claim 1, characterized in that: ​ 3. The multi-point flexible internal and external profile vibration straightening device for large thin-walled ring parts according to claim 1 or 2, characterized in that: ​

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