A device for homogenizing and strengthening residual stress of ring based on direct drive high-speed rotation

Abstract

This invention relates to the field of residual stress homogenization and strengthening technology for ring-shaped workpieces, and discloses a device for residual stress homogenization and strengthening of ring-shaped workpieces based on direct-drive high-speed rotation. The device includes a base, on which a high-speed rotating device is fixed. The high-speed rotating device includes an electric spindle, a spindle seat, a support, a coupling, a clamp, and a ring-shaped workpiece. The electric spindle directly transmits torque to the clamp through the coupling, and then to the ring-shaped workpiece. A protective cover, a protective cover box cover, and a rear cover plate are provided around the high-speed rotating device to ensure operator safety. A sensor bracket is fixed on the base for adjusting the angle of a temperature sensor. A control cabinet is provided outside the base to control the normal operation of the high-speed rotating device. The main feature of this invention is that the electric spindle directly drives the ring-shaped workpiece to rotate at high speed. By utilizing high-speed centrifugal rotation, the residual stress inside the ring-shaped workpiece is homogenized, and the mechanical properties of the ring-shaped workpiece are strengthened. Simultaneously, the protective cover completely encloses the high-speed rotating device, greatly improving safety during operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of residual stress homogenization and strengthening of ring-shaped workpieces, in particular to a residual stress homogenization and strengthening device for ring-shaped workpieces based on direct-drive high-speed rotation. BACKGROUND

[0002] An aero-engine is the only power source of an airplane and is a core component of the airplane. Modern aero-engines, including turbojet engines, turbofan engines, turboshaft engines, and turboprop engines, use a large number of ring-shaped parts. Among them, a turbine disc plays a crucial role in the output thrust of the engine.

[0003] The performance indicators of the turbine disc are extremely strict, and it is required to maintain good mechanical properties at high temperatures. During machining and manufacturing, the turbine disc blank is usually formed by isothermal die forging, and then is machined by mechanical cutting, and contains heat treatment and surface treatment processes. When forging the turbine disc blank, it is inevitable to introduce significant residual stress to the turbine disc blank. These residual stresses will cause unpredictable machining deformation during cutting, will cause a decrease in machining accuracy, and will also cause a decrease in the strength of the turbine disc under working conditions, and will further cause material failure and other serious problems under severe working loads. At present, the residual stress homogenization methods mainly include thermal aging, vibration aging, and ultrasonic aging technologies, which have been widely used. However, due to the particularity of the turbine disc parts, it is difficult to homogenize and control the residual stress of the turbine disc parts.

[0004] Therefore, the present application provides a residual stress homogenization and strengthening device for ring-shaped workpieces based on direct-drive high-speed rotation. The main feature is that the electric spindle directly drives the ring-shaped workpiece to rotate at high speed, and uses high-speed rotation centrifugation to homogenize the internal residual stress of the ring-shaped workpiece and strengthen the mechanical properties of the ring-shaped workpiece. At the same time, the protective cover completely wraps the high-speed rotation equipment, greatly improving the safety performance during operation. SUMMARY

[0005] (I) Technical problems solved

[0006] In view of the deficiencies of the prior art, the present application provides a residual stress homogenization and strengthening device for ring-shaped workpieces based on direct-drive high-speed rotation. The high-speed rotation homogenizes the internal machining residual stress of the ring-shaped workpiece and strengthens the mechanical properties of the ring-shaped workpiece. At the same time, the protective cover completely wraps the high-speed rotation equipment, greatly improving the safety performance during operation.

[0007] (II) Technical solutions

[0008] In order to achieve the above object, the present application provides the following technical scheme: a kind of residual stress homogenization and strengthening device of ring piece based on direct drive high-speed rotation, the upper surface of pedestal is fixed with high-speed rotating equipment, the high-speed rotating equipment includes: motorized spindle, spindle seat, support, coupling, clamp, ring piece etc., wherein, the support is fixed on the upper surface of the pedestal, the spindle seat is fixed on the upper surface of the support, the motorized spindle is installed in the spindle seat, the coupling is used to connect the motorized spindle with the clamp, the ring piece is fixed on the clamp, the upper surface of the pedestal is fixed with a shield, the upper end of the shield is fixed with a shield lifting ring, a plurality of quick clamps are installed on one side of the shield, the other side of the shield is fixed with a back cover plate, a perspective window is arranged on the side of the shield, the perspective window is fixed on the shield by glass pressure bar, the quick clamps connect the shield box cover with the shield, the upper end of the shield box cover is fixed with a shield box cover lifting ring, a pedestal lifting ring is fixed on the pedestal, a sensor support is fixed on the pedestal, a temperature sensor is fixed on the sensor support, a control cabinet is arranged on the outside of the pedestal, a display screen is arranged on the control cabinet, the control cabinet is connected with the temperature sensor and the motorized spindle by wire group.

[0009] Preferably, the motorized spindle is arranged along the horizontal direction, the motorized spindle is directly connected with the clamp through the coupling, the clamp clamps the ring piece, the motorized spindle is YTG series high-speed permanent magnet synchronous motor, and the motorized spindle is driven by a frequency converter.

[0010] Preferably, the spindle seat is provided with a cooling device, and two pairs of high-precision angular contact ball bearings are arranged on the two sides of the spindle seat and connected with the motorized spindle.

[0011] Preferably, the high-speed rotating equipment is provided with the shield, the shield box cover and the back cover plate, the shield is fixed on the pedestal, the back cover plate is fixed on the back side of the shield, and the shield box cover is installed on the front side of the shield through the quick clamps.

[0012] Preferably, the temperature sensor is fixed on the pedestal through the sensor support, and the sensor support can change the pose of the temperature sensor according to the size of the ring piece.

[0013] Preferably, the pedestal is made of gray cast iron, and the shield, the shield box cover and the back cover plate are made of high-strength steel.

[0014] (Three) beneficial effects

[0015] The present application provides a kind of residual stress homogenization and strengthening device of ring piece based on direct drive high-speed rotation, with the following beneficial effects:

[0016] 1. The electric spindle directly drives the ring piece to rotate at high speed, utilizes the centrifugal stress generated by high-speed rotation, homogenizes the machining residual stress inside the ring piece, and strengthens the mechanical properties of the ring piece.

[0017] 2. The ring piece is fixed to the electric spindle through a coupling, a clamp, etc., and the electric spindle drives the ring piece to rotate synchronously, so that power is fully transmitted to the ring piece, and the use efficiency of the electric spindle is improved.

[0018] 3. The base, the shield, the shield box cover, the rear cover plate and other structures greatly ensure the safety of the operator, the top end of the base, the shield and the shield box cover is provided with a lifting ring, which is convenient for transportation, installation, disassembly and other operations, the shield box cover is quickly installed on the shield by using a quick clamp, and the ring piece is conveniently disassembled and replaced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is a front side view of the structure of the present application

[0020] Fig. 2 is a rear side view of the structure of the present application

[0021] Fig. 3 is a structure diagram of the high-speed rotating equipment A of the present application

[0022] The symbols in the drawings are explained as follows:

[0023] A, high-speed rotating equipment; 1, base; 2, sensor support; 3, temperature sensor; 4, base lifting ring; 5, wire group; 6, control cabinet; 7, display screen; 8, perspective window; 9, quick clamp; 10, shield lifting ring; 11, shield; 12, shield box cover lifting ring; 13, shield box cover; 14, rear cover plate; 15, glass pressure strip; 16, electric spindle; 17, spindle seat; 18, support; 20, clamp; 21, ring piece. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] As Figs. 1-3As shown, the present application provides a technical solution: a kind of residual stress homogenization and strengthening device based on direct drive high-speed rotation ring piece, the upper surface of pedestal 1 is fixed with high-speed rotating equipment A, high-speed rotating equipment A includes: motorized spindle 16, spindle base 17, support 18, coupling 19, clamp 20, ring piece 21 etc., wherein, support 18 is fixed on the upper surface of pedestal 1, spindle base 17 is fixed on the upper surface of support 18, motorized spindle 16 is installed in spindle base 17, coupling 19 is used to connect motorized spindle 16 and clamp 20, ring piece 21 is fixed on clamp 20, the upper surface of pedestal 1 is fixed with shroud 11, the upper end of shroud 11 is fixed with shroud lifting ring 10, a plurality of quick clamps 9 are installed on one side of shroud 11, the other side of shroud 11 is fixed with back cover plate 14, the side of shroud 11 is provided with perspective window 8, perspective window 8 is fixed on shroud 11 by glass pressure strip 15, quick clamp 9 connects shroud box cover 13 and shroud 11, the upper end of shroud box cover 13 is fixed with shroud box cover lifting ring 12, pedestal lifting ring 4 is fixed on pedestal 1, sensor support 2 is fixed on pedestal 1, temperature sensor 3 is fixed on sensor support 2, the outer side of pedestal 1 is provided with control cabinet 6, display screen 7 is arranged on control cabinet 6, control cabinet 6 is connected with temperature sensor 3 and motorized spindle 16 by wire group 5.

[0026] Further, motorized spindle 16 is arranged along horizontal direction, motorized spindle 16 is directly connected with clamp 20 through coupling 19, clamp 20 holds ring piece 21, each part of shafting is checked and designed with certain margin, to ensure the safety and reliability of high-speed rotating equipment in whole life cycle, the model of motorized spindle 16 is YTG series high-speed permanent magnet synchronous motor, motorized spindle 16 is driven by frequency converter.

[0027] Further, spindle base 17 is provided with cooling device, to provide circulating cooling oil circuit for rotating shafting, to ensure that bearing temperature is appropriate under high-speed rotating condition of shafting, to prolong service life of equipment, two pairs of high-precision angular contact ball bearings are distributed on the two sides of spindle base 17 and connected with motorized spindle 16.

[0028] Further, shroud 11, shroud box cover 13 and back cover plate 14 are arranged around high-speed rotating equipment A, shroud 11 is fixed on pedestal 1, back cover plate 14 is fixed on the back side of shroud 11, shroud box cover 13 is installed on the front side of shroud 11 through quick clamp 9, to ensure the safety of high-speed rotating equipment operation.

[0029] Further, temperature sensor 3 is fixed on pedestal 1 through sensor support 2, sensor support 2 can change the pose of temperature sensor 3 according to the size of ring piece 21, to accurately measure the temperature of ring piece part.

[0030] Further, the base 1 adopts gray cast iron material, has the advantages of high strength, large specific gravity and good machinability, can make the whole equipment have high rigidity and good stability, the shroud 11, the shroud box 13 and the rear cover plate 14 all adopt high-strength steel material, have good strength, and fully ensure the safety of the operator.

[0031] The working process of the application is as follows: first, the shroud box cover 13 is opened by lifting the shroud box cover lifting ring 12 with the quick clamp 9 on the shroud 11 opened; second, the ring piece 21 is clamped on the clamp 20 to ensure that the ring piece 21 does not loosen during high-speed rotation; third, the shroud box cover 13 is butted with the shroud 11 by lifting the shroud box cover lifting ring 12, and the quick clamp 9 on the shroud 11 is closed to ensure that the shroud box cover 13 and the shroud 11 are tightly matched; fourth, the temperature sensor 3 is adjusted to an appropriate angle by the sensor support 2, so that the temperature sensor 3 accurately measures the temperature around the ring piece 21, and the temperature signal is transmitted to the control cabinet 6 in real time through the wire group 5; fifth, the speed of the electric spindle 16 is set through the display screen 7, the data signal is transmitted to the electric spindle 16 through the wire group 5, the electric spindle 16 transmits the torque to the clamp 20 through the coupling 19, and then to the ring piece 21, so that the ring piece 21 rotates synchronously with the electric spindle 16; sixth, the control cabinet 6 adjusts the cooling device inside the spindle seat 17 according to the temperature signal input by the temperature sensor 3, so that the working temperature of the electric spindle 16 is within a reasonable range; seventh, the working state of the ring piece 21 can be observed through the perspective window 8 to ensure that the ring piece 21 has no abnormal condition during high-speed rotation; eighth, after the ring piece 21 is processed, the quick clamp 9 on the shroud 11 is opened, the shroud box cover 13 is loosened and lifted away, and the reinforced ring piece 21 is taken out, and then the homogenization and reinforcement of the residual stress of the ring piece 21 are completed.

[0032] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present application have been shown and described, it would be appreciated by those skilled in the art that changes can be made in these embodiments without departing from the principles and spirit of the application, the scope of which is defined in the claims and their equivalents.

Claims

1. A device for homogenizing and strengthening residual stress of a ring based on direct drive high-speed rotation, characterized in that, The upper surface of the base (1) is fixed with a high-speed rotating device (A), which comprises an electric spindle (16), a spindle seat (17), a support (18), a coupling (19), a clamp (20) and a ring (21), wherein the support (18) is fixed on the upper surface of the base (1), the spindle seat (17) is fixed on the upper surface of the support (18), the electric spindle (16) is installed in the spindle seat (17), the coupling (19) is used to connect the electric spindle (16) and the clamp (20), the ring (21) is fixed on the clamp (20), the upper surface of the base (1) is fixed with a shield (11), the upper end of the shield (11) is fixed with a shield lifting ring (10), a plurality of quick clamps (9) are installed on one side of the shield (11), the other side of the shield (11) is fixed with a back cover plate (14), a perspective window (8) is arranged on the side of the shield (11), the perspective window (8) is fixed on the shield (11) through a glass pressure strip (15), the quick clamps (9) connect a shield box cover (13) and the shield (11), the upper end of the shield box cover (13) is fixed with a shield box cover lifting ring (12), the base (1) is fixed with a base lifting ring (4), a sensor support (2) is fixed on the base (1), a temperature sensor (3) is fixed on the sensor support (2), the outer side of the base (1) is provided with a control cabinet (6), the control cabinet (6) is provided with a display screen (7), the control cabinet (6) is connected with the temperature sensor (3) and the electric spindle (16) through a wire group (5).

2. The device for homogenization and strengthening of residual stresses in rings based on direct drive high-speed rotation according to claim 1, characterized in that: The electric spindle (16) is arranged in the horizontal direction, the electric spindle (16) is directly connected with the clamp (20) through the coupling (19), the clamp (20) clamps the ring (21), the electric spindle (16) is a YTG series high-speed permanent magnet synchronous motor, and the electric spindle (16) is driven by a frequency converter.

3. The device for homogenization and strengthening of residual stresses in rings based on direct drive high-speed rotation according to claim 1, characterized in that it comprises: The spindle seat (17) is provided with a cooling device, and two pairs of high-precision angular contact ball bearings are arranged on the two sides of the spindle seat (17) and connected with the electric spindle (16).

4. The device for homogenization and strengthening of residual stresses in rings based on direct drive high-speed rotation according to claim 1, characterized in that: The high-speed rotating device (A) is provided with the shield (11), the shield box cover (13) and the back cover plate (14), the shield (11) is fixed on the base (1), the back side of the shield (11) is fixed with the back cover plate (14), and the front side of the shield (11) is provided with the shield box cover (13) through the quick clamps (9).

5. The device for homogenization and strengthening of residual stresses in rings based on direct drive high-speed rotation according to claim 1, characterized in that: The temperature sensor (3) is fixed on the base (1) through the sensor support (2), and the sensor support (2) can change the position of the temperature sensor (3) according to the size of the ring (21).

6. The device for homogenization and strengthening of residual stresses in rings based on direct drive high-speed rotation according to claim 1, characterized in that: The base (1) is made of gray cast iron, and the shield (11), the shield box cover (13) and the back cover plate (14) are made of high-strength steel.

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