CN112322888A - Online reduction method and device for additive composite manufacturing stress based on symmetric high-frequency vibration - Google Patents
Online reduction method and device for additive composite manufacturing stress based on symmetric high-frequency vibration Download PDFInfo
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- CN112322888A CN112322888A CN202011047291.1A CN202011047291A CN112322888A CN 112322888 A CN112322888 A CN 112322888A CN 202011047291 A CN202011047291 A CN 202011047291A CN 112322888 A CN112322888 A CN 112322888A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention belongs to the technical field of residual stress reduction, and relates to an online reduction method and device for large thin-walled part additive composite manufacturing stress based on symmetric high-frequency vibration. The method comprises the following specific steps: carrying out frequency sweeping vibration on the matrix to obtain the natural frequency of the matrix; setting technological parameters of an upper end vibrating device and a lower end vibrating device; after the additive manufacturing is started, firstly, using a lower-end high-frequency vibration device to carry out vibration aging on the base body part; and (3) starting the upper-end high-frequency vibration device to vibrate and age the workpiece when the height of the workpiece increases and reaches a preset height (the upper-end vibration device can clamp the workpiece). According to the invention, the four high-frequency vibration sources are arranged at the joint of the substrate and the additive manufacturing workpiece, so that the effect of vibration superposition is achieved, the amplitude of high-frequency vibration is improved, the energy input is increased, and the stress reduction effect of the residual stress reduction effect is regulated and controlled, thereby realizing the online reduction of the composite additive manufacturing stress of the large thin-wall part.
Description
Technical Field
The invention belongs to the technical field of additive composite manufacturing, and particularly relates to an online stress reduction method and device in additive composite manufacturing of a large thin-walled part.
Background
With the development of additive manufacturing technology, the additive manufacturing technology is increasingly applied to the manufacturing, operation and maintenance of large-scale complex components in the field of equipment such as aerospace and maritime work. In combination with the rapid manufacturing requirements of large complex components such as aircraft panels and engine blisks, a composite manufacturing technology of cast forging and additive manufacturing has become the most potential solution, for example: the method is characterized in that wall plate structures which are criss-cross and different in size are manufactured on a base body of a plate material in an additive mode, blisk blades are manufactured on a base body of a forging piece in an additive mode, and the like. Along with the layer-by-layer superposition forming of the additive manufacturing structure, the temperature gradient between the forming structure and the base body is increased, the internal stress of the forming structure is gradually increased, the forming structure is deformed by the excessive internal stress, and even the forming structure is cracked and separated from the base body, so that the precision and the quality of additive manufacturing are seriously influenced, and even a workpiece is scrapped.
At present, a mode of staged additive manufacturing and time-sharing stress-relief heat treatment is generally adopted to relieve residual stress generated in the additive manufacturing process, namely deformation and cracking caused by overlarge stress accumulation are avoided, and in combination with the size of a workpiece and the requirements of an additive manufacturing process, additive manufacturing is interrupted every time a certain amount of structures are additively manufactured, stress-relief heat treatment is carried out, and the steps are repeated until the workpiece is manufactured through forming. The method interrupts the forming manufacture for many times, and seriously influences the manufacturing efficiency; in addition, the metal additive manufacturing needs to purify the processing atmosphere, and the manufacturing cost is increased by exhausting and purifying the atmosphere for multiple times.
Therefore, when a large-scale complex structure is manufactured by adopting an additive composite manufacturing technology, particularly for a large-scale thin-wall structure, how to design a reasonable online stress reduction device is to reduce the stress of a workpiece on line, which is a guarantee and key for successfully finishing the additive composite manufacturing of the large-scale thin-wall structure and is also a fundamental way for improving the manufacturing efficiency and reducing the cost of the workpiece.
Disclosure of Invention
The purpose of the invention is as follows:
the invention designs a symmetrical high-frequency vibration-based online reduction method and device for composite additive manufacturing stress of a large complex-structure thin-wall part, and aims to solve the problems in the aspects of regulation and control of residual stress reduction efficiency and reduction effect in the prior art.
The technical scheme is as follows:
a method for online reducing stress in additive composite manufacturing based on symmetric high-frequency vibration, in particular to a method for online reducing stress in additive composite manufacturing of a large thin-walled part, is characterized by being executed according to the following steps:
(a) firstly, carrying out frequency sweeping vibration on a substrate to obtain the natural frequency of the substrate;
(b) calculating the mass of the workpiece according to different printed heights, wherein the method needs to calculate the total mass of the base body and the workpiece when the height of the workpiece rises by 30-50 mm every time so as to obtain the natural frequencies with different masses, and the process parameters of the upper end vibrating device and the lower end vibrating device are changed timely according to the natural frequencies;
(c) after the additive manufacturing is started, two high-frequency vibration devices with symmetrical lower ends perform vibration aging on the base body and the growing workpiece for continuous vibration until the machining is finished;
(d) when the height of the workpiece reaches 30-50 mm, changing the vibration frequency of the two sides of the lower end and the upper end according to the mass change of the base body and the workpiece, simultaneously clamping the workpiece by using high-frequency vibration devices on the two sides of the upper end, starting to perform vibration aging on the workpiece with the height of 0-50 mm, setting the vibration aging time to be 10-30 min according to the mass difference of the workpiece, and then automatically returning the upper end vibration device to the initial position; when the height of a printed workpiece is increased to 100mm, changing the vibration frequency of vibration sources at two sides of the lower end and the upper end according to the total mass of a measured base body and the workpiece, enabling the height of a high-frequency vibration device at the upper end to rise by 50mm and clamp the workpiece, continuing performing vibration aging on the workpiece at the position with the height of 50-100 mm, and repeating the steps, wherein once the height of the workpiece rises by 50mm, the vibration frequency of the upper end and the lower end is adjusted once, the vibration device at the upper end rises by 50mm, and performing vibration aging on the newly grown position of the workpiece once;
(e) if the workpiece 24 is machined, part of the residual stress still exists, and the workpiece can be subjected to secondary or multiple vibration aging until the residual stress is reduced to meet the requirement.
The process parameters set in the step (b) are as follows: the vibration frequency is 1 k-2 kHz, the exciting force is 40-80 MPa, and the vibration time is 10-30 min.
In the step (d), in order to ensure that all the workpieces subjected to additive manufacturing are subjected to high-frequency vibration, the height of 50mm is determined according to the longitudinal size of a contact surface between a vibration amplifier and the workpieces, and a high-frequency vibration device at the lower end is started when the workpieces start to be printed and is stopped until the processing is finished; the change of the high-frequency vibration frequency of the upper end and the lower end is determined according to the total mass of the base body and the workpiece, the mass of the workpiece is continuously increased along with the increase of the printing size of the workpiece, the natural frequency of the workpiece is changed, the total mass of the workpiece and the base body with different heights is calculated before the workpiece is printed, the natural frequency of the base body and the whole workpiece under different masses is calculated, and the vibration frequency of the upper end vibration device and the lower end vibration device is required to be changed once per liter to achieve the optimal stress relief effect; natural frequency calculation formula:
wherein k is the stiffness coefficient N/m, m being the mass of the object;
the stiffness coefficient k is related to the hardness of the workpiece, and the determination of the natural frequency is only related to the mass; the basis for determining the magnitude of the exciting force is that the sum of the dynamic stress and the residual stress is larger than the yield limit of the material, the dynamic stress is smaller than the fatigue limit, and the range of the exciting force can be set between 40 MPa and 80 MPa; the vibration aging time is related to the quality of the workpiece, and the larger the quality is, the longer the aging time is, and the time is between 10min and 30 min.
An apparatus for on-line stress relief based on symmetric high-frequency vibration additive composite manufacturing as described above, characterized in that:
the base body is fixed on the workbench, and the left side and the right side of the base body are provided with lower end high-frequency vibration devices; an adjusting bracket is arranged on the workbench, a lifting device is arranged on the adjusting bracket, and an upper-end high-frequency vibration device is fixed on the lifting device; a printing device is arranged above the substrate.
The upper end high-frequency vibration device and the lower end high-frequency vibration device comprise vibration amplifiers for clamping workpieces; the other end of the vibration amplifier is provided with an electromagnetic vibration exciter.
The high-frequency vibration devices at the lower ends of the left side and the right side are fixed on the workbench, and the high-frequency vibration devices at the upper ends of the left side and the right side are fixed on the lifting devices at the left side and the right side; the lifting device comprises: the lifting adjusting motor is fixed on the adjusting support, a lower end ball screw is connected above the lifting adjusting motor, a lifting platform is arranged above the lower end ball screw, a horizontal adjusting motor is fixed on the lifting platform and connected with an upper end ball screw, and the other end of the upper end ball screw is connected with an upper end high-frequency vibration device.
The adjusting bracket, the lower end high-frequency vibration device, the lifting device and the upper end high-frequency vibration device are symmetrically arranged.
The circuit connection relationship of the high-frequency vibration device is as follows: the industrial personal computer is connected with the signal generator, the signal generator is connected with the power amplifier, and the power amplifier is connected with the electromagnetic vibration exciter; the acceleration sensor is connected with the vibration signal collector, and the vibration signal collector is connected with the industrial personal computer. .
The invention has the beneficial effects that:
(1) the joint of the base body and the additive manufacturing workpiece structure is provided with four symmetrical high-frequency vibration sources, and the vibration superposition effect can be achieved by adjusting the frequency, the exciting force and the vibration time of the four vibration sources, so that the high-frequency vibration amplitude is improved, the energy input is increased, and the residual stress reduction effect is regulated and controlled.
(2) According to the geometric characteristics and the material characteristics of the structures of the substrate and the material increase manufacturing workpiece, the vibration amplifier is designed adaptively, and the stress reduction effect is improved.
(3) The characteristics of gradual growth of the workpiece and dynamic increase of residual stress in the material increase manufacturing process are combined, and the stress is reduced on line by regulating and controlling the excitation frequency, the excitation force and the vibration time of the upper end.
Drawings
FIG. 1 is a schematic diagram of a high frequency vibration abatement additive manufacturing stress apparatus;
FIG. 2 is a top plan view of a portion of the base at the source of vibration;
FIG. 3 is a schematic circuit diagram of an upper symmetrical dither system;
the figure is marked with: an industrial personal computer 1, an upper end left signal generator 2, an upper end left power amplifier 3, an upper end left electromagnetic exciter 4, an upper end left acceleration sensor 5, an upper end right acceleration sensor 6, an upper end left vibration signal collector 7, an upper end right signal generator 8, an upper end right power amplifier 9, an upper end right electromagnetic exciter 10, an upper end right vibration signal collector 11, an upper end vibration amplifier 12, an upper end bracket 13, an upper end ball screw 14, a horizontal adjustment motor 15, a lifting platform 16, a support plate 17, a lower end support rod 18, a lower end ball screw 19, a lifting adjustment motor 20, a bolt 21, an adjustment bracket 22, a workbench 23, a workpiece 24, a base body 25, a lower end vibration amplifier 26, an adjusting sheet 27, a lower end electromagnetic exciter 28, a cooling device 29 and a printing device 30.
The specific implementation mode is as follows:
in order to further explain the stress online reduction device for the high-frequency vibration additive manufacturing workpiece, the following description is provided with the accompanying drawings.
As shown in fig. 1 and 2, a workpiece 24 of an additive manufactured workpiece is disposed on a substrate 25. The base body 25 is provided on the table 23, and on both left and right sides thereof, lower end vibration amplifiers 26 are provided, the lower end vibration amplifiers 26 being used for clamping and fixing the workpiece. The lower end vibration amplifier 26 is provided at the other end thereof with a lower end electromagnetic exciter 28, and the lower end electromagnetic exciter 28 generates an amplitude which is amplified by the lower end vibration amplifier 26 and acts on the workpiece 24. The base body 25 is adjusted for clamping by varying the thickness of the adjustment flap 27. Adjusting brackets 22 are provided on both sides of the lower-end high-frequency vibration device, and the adjusting brackets 22 are fixed to a table 23 by bolts 21. The lifting adjusting motor 20 is fixed with the adjusting bracket 22, a lower end ball screw 19 is connected above the lifting adjusting motor 20, and the lifting adjusting motor 20 is used for adjusting the lower end ball screw 19 so as to control the vertical height of the upper end high-frequency vibration device. Lower end support rods 18 are arranged on two sides of the lower end ball screw 19 and play a role in supporting and limiting. A support plate 17 is arranged above the lower end ball screw 19 and used for supporting and fixing the lifting platform 16. An upper end high-frequency vibration device is fixed on the lifting platform 16, wherein: horizontal adjustment motor 15 is connected with upper end ball 14, and upper end ball 14 both sides are equipped with upper end support 13, play support and spacing effect. An upper end electromagnetic vibration exciter 4 is arranged at the other end of the upper end ball screw 14, and an upper end vibration amplifier 12 is arranged between the upper end electromagnetic vibration exciter 4 and the workpiece 24. The additively manufactured workpiece 24 is clamped by the lower end vibration amplifier 26 and the upper end vibration amplifier 12, and is vibrated in-line by the electromagnetic exciter. And a cooling device 29 is arranged outside the electromagnetic vibration exciter to cool the electromagnetic vibration exciter at the upper end and the lower end, so that the device is prevented from being damaged by high temperature in the additive manufacturing process. A printing device 30 is disposed above the workpiece 24, and as the height of the workpiece 24 increases, the printing device 30 also increases.
As shown in fig. 3, the lead connection sequence of the high frequency vibration device on the left side of the upper end is: the device comprises an industrial personal computer 1, an upper left signal generator 2, an upper left power amplifier 3 and an upper left electromagnetic vibration exciter 4; the upper end left side acceleration sensor 5, the upper end left side signal collector 7 and the industrial personal computer 1. The wire connection sequence of the high-frequency vibration device on the right side of the upper end is as follows: the device comprises an industrial personal computer 1, an upper right signal generator 8, an upper right power amplifier 9 and an upper right electromagnetic vibration exciter 10; the upper end right side acceleration sensor 6, the upper end right side vibration signal collector 11 and the industrial personal computer 1.
The left side of the other lower ends and the right side of the lower ends are connected in the same way as before. In the control system, an industrial personal computer 1, a signal generator, a power amplifier, an electromagnetic vibration exciter, an acceleration sensor and a signal collector are all conventional devices.
The symmetrical high-frequency vibration online stress relief method comprises the following steps:
1. before the workpiece 24 starts additive manufacturing, the substrate 25 is subjected to frequency sweep vibration, and the natural frequency of the substrate 25 is obtained. The base body 25 is sandwiched between two vibration amplifiers 26 at the lower end, and the base body 25 is fixedly clamped by the thickness of an adjustment piece 27 between the vibration amplifiers 26 and an electromagnetic exciter 28.
2. The technical parameter ranges of the upper end vibrating device and the lower end vibrating device are set, the vibration frequency is 1 k-2 kHz, the exciting force is 60-80 MPa, and the vibration time is 10-30 min.
3. After the additive manufacturing is started, the base 25 and the workpiece 24 are first subjected to vibratory stress using a lower-end high-frequency vibratory apparatus for a constant vibration time until the machining is completed.
4. Along with the increase of the height of a workpiece, when the height reaches 30-50 mm, the horizontal adjusting motor 15 drives the upper end ball screw 14 to enable the upper end vibration amplifier 12 to clamp the workpiece 24 and start high-frequency vibration aging, meanwhile, the frequency of the upper end vibration device and the lower end vibration device is adjusted according to the mass changes of the base body 25 and the workpiece 24, online stress reduction is achieved, when the vibration time is up (10 min-30 min), the upper end vibration stops, the vibration devices on the two sides of the upper end move back to the initial position, and the lower end continues to vibrate until the machining is finished.
5. As the additive manufacturing progresses, the height of the workpiece 24 rises continuously, and when the height rises to 100mm, the action of step 4 is repeated. By analogy, when the height of the workpiece 24 rises by 50mm, the vibration frequency of the upper end and the lower end is adjusted once, and the workpiece is subjected to vibration aging once. The longitudinal height of the contact surface of the vibration amplifier and the workpiece is 50mm, the vibration amplifier can be designed according to different shapes of workpieces 24, and the size of the exciting force can be changed by changing the contact area, so that the optimal stress relief effect is achieved.
6. If the workpiece 24 is machined, part of the residual stress still exists, and the workpiece can be subjected to secondary or multiple vibration aging until the residual stress is reduced to meet the requirement.
In the step 4, in order to ensure that all the workpieces subjected to additive manufacturing are subjected to high-frequency vibration, the height of 50mm is determined according to the longitudinal dimension of the contact surface of the vibration amplifier and the workpieces, and the high-frequency vibration device at the lower end is started when the workpieces start to be printed and is stopped until the processing is finished; the change of the high-frequency vibration frequency of the upper end and the lower end is determined according to the total mass of the base body and the workpiece, the mass of the workpiece is continuously increased along with the increase of the printing size of the workpiece, the natural frequency of the workpiece is changed, the total mass of the workpiece and the base body with different heights is calculated before the workpiece is printed, the natural frequency of the base body and the whole workpiece under different masses is calculated, and the vibration frequency of the upper end vibration device and the lower end vibration device is required to be changed once per liter to achieve the optimal stress relief effect; natural frequency calculation formula:
wherein k is the stiffness coefficient N/m, m being the mass of the object;
the stiffness coefficient k is related to the hardness of the workpiece, and the determination of the natural frequency is only related to the mass; the basis for determining the magnitude of the exciting force is that the sum of the dynamic stress and the residual stress is larger than the yield limit of the material, the dynamic stress is smaller than the fatigue limit, and the range of the exciting force can be set between 40 MPa and 80 MPa; the vibration aging time is related to the quality of the workpiece, and the larger the quality is, the longer the aging time is, and the time is between 10min and 30 min.
Claims (8)
1. A method for online reducing stress in additive composite manufacturing based on symmetric high-frequency vibration, in particular to a method for online reducing stress in additive composite manufacturing of a large thin-walled part, is characterized by being executed according to the following steps:
(a) firstly, carrying out frequency sweeping vibration on a substrate to obtain the natural frequency of the substrate;
(b) calculating the mass of the workpiece according to different printed heights, wherein the method needs to calculate the total mass of the base body and the workpiece when the height of the workpiece rises by 30-50 mm every time so as to obtain the natural frequencies with different masses, and the process parameters of the upper end vibrating device and the lower end vibrating device are changed timely according to the natural frequencies;
(c) after the additive manufacturing is started, two high-frequency vibration devices with symmetrical lower ends perform vibration aging on the base body and the growing workpiece for continuous vibration until the machining is finished;
(d) when the height of the workpiece reaches 30-50 mm, changing the vibration frequency of the two sides of the lower end and the upper end according to the mass change of the base body and the workpiece, simultaneously clamping the workpiece by using high-frequency vibration devices on the two sides of the upper end, starting to perform vibration aging on the workpiece with the height of 0-50 mm, setting the vibration aging time to be 10-30 min according to the mass difference of the workpiece, and then automatically returning the upper end vibration device to the initial position; when the height of a printed workpiece is increased to 100mm, changing the vibration frequency of vibration sources at two sides of the lower end and the upper end according to the total mass of a measured base body and the workpiece, enabling the height of a high-frequency vibration device at the upper end to rise by 50mm and clamp the workpiece, continuing performing vibration aging on the workpiece at the position with the height of 50-100 mm, and repeating the steps, wherein once the height of the workpiece rises by 50mm, the vibration frequency of the upper end and the lower end is adjusted once, the vibration device at the upper end rises by 50mm, and performing vibration aging on the newly grown position of the workpiece once;
(e) if the workpiece 24 is machined, part of the residual stress still exists, and the workpiece can be subjected to secondary or multiple vibration aging until the residual stress is reduced to meet the requirement.
2. The method for on-line mitigation of stresses based on symmetric dither composite fabrication as recited in claim 1, wherein: the process parameters set in the step (b) are as follows: the vibration frequency is 1 k-2 kHz, the exciting force is 40-80 MPa, and the vibration time is 10-30 min.
3. The method for on-line mitigation of stresses based on symmetric dither composite fabrication as recited in claim 1, wherein: in the step (d), in order to ensure that all the workpieces subjected to additive manufacturing are subjected to high-frequency vibration, the height of 50mm is determined according to the longitudinal size of a contact surface between a vibration amplifier and the workpieces, and a high-frequency vibration device at the lower end is started when the workpieces start to be printed and is stopped until the processing is finished; the change of the high-frequency vibration frequency of the upper end and the lower end is determined according to the total mass of the base body and the workpiece, the mass of the workpiece is continuously increased along with the increase of the printing size of the workpiece, the natural frequency of the workpiece is changed, the total mass of the workpiece and the base body with different heights is calculated before the workpiece is printed, the natural frequency of the base body and the whole workpiece under different masses is calculated, and the vibration frequency of the upper end vibration device and the lower end vibration device is required to be changed once per liter to achieve the optimal stress relief effect; natural frequency calculation formula:
wherein k is the stiffness coefficient N/m, m being the mass of the object;
the stiffness coefficient k is related to the hardness of the workpiece, and the determination of the natural frequency is only related to the mass; the basis for determining the magnitude of the exciting force is that the sum of the dynamic stress and the residual stress is larger than the yield limit of the material, the dynamic stress is smaller than the fatigue limit, and the range of the exciting force can be set between 40 MPa and 80 MPa; the vibration aging time is related to the quality of the workpiece, and the larger the quality is, the longer the aging time is, and the time is between 10min and 30 min.
4. An apparatus for on-line mitigation of stresses based on symmetric high-frequency vibratory additive composite manufacturing according to claim 1, wherein:
the base body (25) is fixed on the workbench (23), and the left side and the right side of the base body (25) are provided with lower end high-frequency vibration devices; an adjusting bracket (22) is arranged on the workbench (23), a lifting device is arranged on the adjusting bracket (22), and a high-frequency vibration device at the upper end is fixed on the lifting device; a printing device (30) is provided above the base (25).
5. The device based on symmetrical high-frequency vibration additive composite manufacturing stress online reduction of claim 4, wherein: the upper end high-frequency vibration device and the lower end high-frequency vibration device comprise vibration amplifiers for clamping a workpiece (24); the other end of the vibration amplifier is provided with an electromagnetic vibration exciter.
6. The device based on symmetrical high-frequency vibration additive composite manufacturing stress online reduction of claim 4, wherein: the lower end high-frequency vibration devices on the left side and the right side are fixed on the workbench (23), and the upper end high-frequency vibration devices on the left side and the right side are fixed on the lifting devices on the left side and the right side; the lifting device comprises: the lifting adjusting motor (20) is fixed on the adjusting support (22), a lower end ball screw (19) is connected above the lifting adjusting motor (20), a lifting platform (16) is arranged above the lower end ball screw (19), a horizontal adjusting motor (15) is fixed on the lifting platform (16), the horizontal adjusting motor (15) is connected with an upper end ball screw (14), and the other end of the upper end ball screw (14) is connected with an upper end high-frequency vibration device.
7. The device based on symmetrical high-frequency vibration additive composite manufacturing stress online reduction of claim 4, wherein: the adjusting bracket (22), the lower end high-frequency vibration device, the lifting device and the upper end high-frequency vibration device are symmetrically arranged.
8. The device based on symmetrical high-frequency vibration additive composite manufacturing stress online reduction of claim 4, wherein: the circuit connection relationship of the high-frequency vibration device is as follows: the industrial personal computer is connected with the signal generator, the signal generator is connected with the power amplifier, and the power amplifier is connected with the electromagnetic vibration exciter; the acceleration sensor is connected with the vibration signal collector, and the vibration signal collector is connected with the industrial personal computer.
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| CN113909503A (en) * | 2021-10-27 | 2022-01-11 | 沈阳工业大学 | Micro-vibration-based auxiliary metal part laser additive manufacturing device and method |
| CN115592288A (en) * | 2022-09-15 | 2023-01-13 | 北京工业大学（Cn） | Method and device for improving additive manufacturing molding quality |
| EP4272880A1 (en) * | 2022-05-06 | 2023-11-08 | Siemens Energy Global GmbH & Co. KG | Stress relieving for continuous flow engine components |
| WO2023236256A1 (en) * | 2022-06-08 | 2023-12-14 | 五邑大学 | Electric arc additive device, control method for electric arc additive device, and storage medium |
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