High-energy acoustic beam array regulation and control device and method for residual stress of gray iron guide rail

Abstract

The invention belongs to the technical field of gray iron guide rail residual stress regulation and control, and relates to a gray iron guide rail residual stress high-energy acoustic beam array regulation and control device and method. The device comprises a plurality of high-energy acoustic beam units, a guide screw, a propelling screw, a flat plate base, a left L-shaped support, a right L-shaped support, an upper supporting plate and a power ultrasonic power supply, each high-energy acoustic beam unit comprises an ultrasonic vibrator, a plugging bolt, a spring and an amplitude-change pole; an ultrasonic vibrator, a plug bolt and a spring on the device form a high-energy acoustic beam unit, and the high-energy acoustic beam unit is tightly pressed and attached to the surface of a residual stress concentration area of the gray iron guide rail through a coupling medium; the high-energy acoustic beam unit generates high-power ultrasonic waves under the driving of a power ultrasonic power supply, the high-power ultrasonic waves are emitted into the guide rail in a contact coupling mode, when the energy of the high-energy acoustic beam is larger than dislocation potential energy in a material, a residual stress field is broken, an internal stress field is redistributed again and reaches new balance, and residual stress is relaxed and released. And the residual stress on the surface and in the guide rail is reduced and homogenized.

Description

Technical Field

[0001] The invention belongs to the technical field of residual stress control of gray iron guide rails, and in particular relates to a high-energy acoustic beam array control device and method for residual stress of gray iron guide rails. Background Art

[0002] During the casting and machining processes, the guide rails of high-end manufacturing equipment and weapon equipment (made of HT250) will inevitably produce residual stresses of varying degrees due to uneven heating or force. The existence of residual stress greatly affects the dimensional stability, stiffness, fatigue strength, brittle fracture resistance and machining performance of the guide rails. Usually, cast iron guide rails containing residual stress are in an unstable state. Under the effect of the equilibrium effect of stress, the relaxation and redistribution of stress will cause the guide rails to deform or even crack, which seriously affects the assembly and normal use of the guide rails, and restricts the high-quality development of my country's high-end manufacturing equipment and weapon equipment.

[0003] Traditional stress relief methods include natural aging, stress relief annealing (artificial aging), vibration aging and other methods. The natural aging method has a long cycle and low efficiency. The traditional stress relief annealing method usually requires long-term heat preservation of the components, and the gray iron material is generally 8-12 hours, which greatly reduces the utilization rate of the guide rail, wastes energy and increases the machining cost. In addition, if the temperature control of the heating and cooling process is not proper, the new temperature gradient will also cause secondary stress. The vibration aging method is to use the overall resonance of the component to remove the residual stress inside the component, but this method is complicated to operate and the stress relief effect is not ideal. If it is not operated properly, it will also cause fatigue damage and even deformation and cracking. Therefore, in the different process treatments of machine tool guide rails, especially after casting and rough machining, it is necessary to find a new, low-cost and high-efficiency method to effectively reduce or homogenize the residual stress on the surface and inside of the gray iron guide rails as much as possible, so that the guide rails are in a low-stress state, which is convenient for subsequent precision machining and service. Summary of the invention

[0004] In order to break through the problems of traditional natural aging and heat treatment aging stress relief, such as long time consumption, high energy consumption, and environmental pollution, and effectively reduce or homogenize the residual stress on the surface and inside of the guide rail, the present invention provides a gray iron guide rail residual stress control device and method using a high-energy acoustic beam array, which can quickly remove the residual stress on the surface and inside of the guide rail.

[0005] In order to solve the above problems, the present invention provides a high-energy sound beam array control device for regulating the residual stress on the surface and inside of a gray iron guide rail, comprising a plurality of high-energy sound beam units, a guide screw 5, a push screw 6, a flat base 7, a left / right L-shaped support 8, an upper support plate 9, and a power ultrasonic power supply; each high-energy sound beam unit comprises an ultrasonic vibrator 3, a plug bolt 1, a spring 2, and a horn 11; the flat base 7 comprises a high-energy sound beam array control workbench 12 and a guide side 13, the guide side 13 being arranged at the four corners of the high-energy sound beam array control workbench 12, and having a guiding effect on the forward and backward movement of the left / right L-shaped support 8, so that the support does not deviate, and ensuring that the end faces of all ultrasonic vibrators on the support are parallel to the side faces of the guide rail, and can fit tightly during stress control work;

[0006] The upper support plate 9 is provided with a guide hole at each of its four corners, and is fixed above the high-energy sound beam array control workbench 12 through a guide screw 10. The gray iron guide rail is placed in the middle of the high-energy sound beam array control workbench 12 and is located below the upper support plate 9. The upper support plate 9 is provided with a vibrator mounting hole. Each ultrasonic vibrator 3 is vertically mounted in the ultrasonic vibrator flange mounting hole arranged on the upper support plate 9 through a plug bolt 1 and a spring 2 installed on its flange structure.

[0007] The left / right L-shaped support 8 is installed on both sides of the flat base 7; ultrasonic vibrator flange mounting holes are evenly arranged on the vertical plate of the left / right L-shaped support 8; the plug bolt 1 is sleeved on the spring, and each ultrasonic vibrator 3 is horizontally fixed in the vibrator mounting hole on the vertical plate of the left / right L-shaped support 8 through the plug bolt 1 and the spring 2 installed on its flange structure; four push screws 6 are respectively connected to the left / right L-shaped support 8 in pairs, and are used to push the left / right L-shaped support 8 to press against the gray iron guide rail; by rotating the four push screws 6 at both ends, the left / right L-shaped support 8 on both sides is forced to move toward the middle and clamp the guide rail, while compressing the spring 3;

[0008] The power ultrasonic power supply is connected to the ultrasonic vibrator, and the power supply excites the ultrasonic vibrator with a high-frequency and high-power sinusoidal wave signal, thereby causing the ultrasonic vibrator to emit high-frequency and high-power ultrasonic waves into the guide rail material.

[0009] Furthermore, eight ultrasonic vibrators 1 are disposed on each of the left and right L-shaped supports 8 .

[0010] Furthermore, 16 ultrasonic vibrators 1 are arranged on the upper support plate 9 .

[0011] Furthermore, the ultrasonic vibrator is a half-wavelength vibration system with a frequency of 15 kHz, the rated output power of the ultrasonic vibrator is 2000 W, and the output power after pressing the surface of the guide rail is 200 W.

[0012] Furthermore, the ultrasonic vibrator is mainly composed of a 15kHZ aluminum alloy piezoelectric ultrasonic transducer and a 15kHZ aluminum alloy stepped horn 11 .

[0013] Furthermore, the spring specifications are selected as follows: wire diameter 1.5mm, outer diameter 12mm, length 20mm, and 6 pieces per group.

[0014] Furthermore, the relative compression amount of the spring before and after the stress regulation of the guide rail is 3mm-5mm.

[0015] Furthermore, the power ultrasonic power supply selects a 15kHz digital ultrasonic power supply with automatic frequency tracking and a rated power of 2500W.

[0016] Another aspect of the present invention provides a method for regulating residual stress of a gray iron guide rail, comprising the following steps:

[0017] Step 1: Stress detection before regulation: Perform residual stress detection on the working surface of the gray iron guide rail, and record the size and distribution of residual stress on the guide rail surface before stress regulation;

[0018] Step 2: Place the guide rail on the high-energy acoustic beam array control workbench 12 to ensure the stability of the entire stress control device; apply high-temperature grease with coupling effect on the front end surface of each ultrasonic vibrator, adjust the left / right L-shaped support 8 and the upper support plate 9, so that all 32 ultrasonic vibrators 3 are tightly pressed against the upper surface, left end surface and right end surface of the guide rail, and the compression increment of each spring 2 is 3mm-5mm;

[0019] Step 3: Set the power ultrasonic power supply parameters; turn on the power ultrasonic power supplies one by one, adjust the amplitude setting parameters, and make the stable working frequency of a single control channel 15kHZ and the working power 200W;

[0020] Step 4: Stress regulation: Stress regulation is completed in two times, with a single regulation time of 30 minutes, and a 10-minute stop in the middle for system heat dissipation and adjustment of the compression state;

[0021] Step 5: stress detection after adjustment; after the guide rail stress adjustment is completed, the guide rail is taken out from the high-energy acoustic beam array adjustment workbench 12 and placed on the stress detection workbench for stress detection after adjustment; if the stress size and distribution state of the guide rail after adjustment are still large and concentrated, repeat the stress adjustment from the second step to the fourth step until the guide rail stress is effectively reduced and homogenized to a low stress state, that is, the stress value is less than 30% of the yield strength of the gray iron material.

[0022] Furthermore, in the fourth step, after the power supply parameters are set, the single working time of each power ultrasonic power supply is set to 30 minutes; the power ultrasonic power supplies are turned on one by one to start stress regulation; all power ultrasonic power supplies can also be group controlled by the upper computer, and the power ultrasonic power supplies can be synchronously turned on and stopped to send ultrasonic excitation signals; after the 30-minute stress regulation is completed, the regulation is stopped, and the stress regulation device is cooled for 10 minutes before performing the second 30-minute stress regulation.

[0023] Beneficial effects: The present invention adopts a structural form of a bottom plate base, a left L-shaped plate, a right L-shaped plate, a support plate, a push screw, and a double-headed guide screw. By adjusting the push screw, the ultrasonic vibrators on both sides are closely fitted to the two side surfaces of the gray iron guide rail; by installing and fixing the guide screw, the ultrasonic vibrator on the top is closely fitted to the top of the gray iron guide rail, and the high-energy ultrasonic energy generated by the ultrasonic vibrator acts on the inside of the guide rail. Under the action of alternating stress, the yield strength of the material will be reduced. When the energy of the high-energy sound beam is greater than the dislocation potential energy inside the material, the misaligned atoms of the material will be activated, and the residual stress field will be broken, eventually causing the material to produce a small plastic deformation, and the internal stress field will be redistributed and reach a new balance, and the residual stress can be relaxed and released, realizing the reduction and homogenization of the residual stress on the surface and inside of the guide rail. The present invention has the advantages of simple operation, short time consumption, low energy consumption, and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the high-energy acoustic beam array residual stress control device for gray iron guide rails of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of a high-energy sound beam unit of a high-energy sound beam guide rail control device for a gray iron guide rail of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the left / right L-shaped support of the gray iron rail high-energy acoustic beam array control device of the present invention;

[0027] Figure 4 This is a schematic diagram of the flat base structure of the gray iron rail high-energy acoustic beam array control device of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the upper support plate of the gray iron rail high-energy acoustic beam array control device of the present invention;

[0029] In the figure: 1-ultrasonic vibrator; 2-plug screw; 3-spring; 4-eye; 5-guide screw; 6-advance screw; 7-flat base; 8-left / right L-shaped support; 9-upper support plate. DETAILED DESCRIPTION

[0030] The purpose, content and advantages of the present invention are more clear, and the embodiments of the present invention are further described in detail below.

[0031] like Figures 1 to 5 As shown, the present invention proposes a gray iron guide rail residual stress control device using a high-energy acoustic beam array. The structure of the device mainly includes multiple high-energy acoustic beam units, a lifting ear 4, a guide screw 5, a push screw 6, a flat base 7, a left / right L-shaped support 8, an upper support plate 9, and a power ultrasonic power supply.

[0032] Each high-energy sound beam unit includes an ultrasonic vibrator 3 , a plugging bolt 1 , a spring 2 and a horn 11 .

[0033] The flat plate base 7 includes a high-energy acoustic beam array control workbench 12 and a guide side 13. The guide side 13 is arranged at the four corners of the high-energy acoustic beam array control workbench 12, and has a guiding effect on the forward and backward movement of the left / right L-shaped support 8, so that the support does not deflect, ensuring that the end faces of all ultrasonic vibrators on the support are parallel to the side faces of the guide rail, and can fit tightly against each other during stress control work.

[0034] The upper support plate 9 is provided with a guide hole at each of its four corners, and is fixed above the high-energy sound beam array control workbench 12 through a guide screw 10. The gray iron guide rail is placed in the middle of the high-energy sound beam array control workbench 12 and is located below the upper support plate 9. A vibrator mounting hole is provided on the upper support plate 9. Four lifting ears 4 are provided at the four corners of the upper support plate 9 for lifting the upper support plate 9.

[0035] The left / right L-shaped supports 8 are installed on both sides of the high-energy acoustic beam array control workbench 12 of the flat base 7; ultrasonic vibrator flange mounting holes are evenly arranged on the vertical plates of the left / right L-shaped supports 8; the plug bolt 1 is sleeved on the spring, and each ultrasonic vibrator 3 is horizontally fixed in the vibrator mounting hole on the vertical plate of the left / right L-shaped support 8 by the plug bolt 1 and the spring 2 installed on its flange structure; four pushing screws 6 are respectively connected to the left / right L-shaped supports 8 in pairs, and are used to push the left / right L-shaped supports 8 to press against the gray iron guide rail; by rotating the four pushing screws 6 at both ends, the left / right L-shaped supports 8 on both sides are forced to move toward the middle and clamp the guide rail, while compressing the spring 3.

[0036] The driving bolt 1 is sleeved on the spring, and each ultrasonic vibrator 3 is vertically installed in the ultrasonic vibrator flange mounting hole arranged on the upper support plate 9 through the driving bolt 1 and the spring 2 installed on its flange structure.

[0037] In the present invention, the design requirements of the spring 2 are: the spring specifications are selected to have a wire diameter of 1.5mm, an outer diameter of 12mm, and a length of 20mm, and a group of 6 springs are assembled together with the flange structure of the plug bolt 1 and the ultrasonic vibrator 3, so that the front end surface of the ultrasonic vibrator is pressed against the surface of the guide rail. The relative compression amount of the spring before and after the stress regulation of the guide rail is 3mm-5mm.

[0038] Design requirements of ultrasonic vibrator 1: The ultrasonic vibrator is a half-wavelength vibration system with a frequency of 15kHZ, which is composed of a 15kHZ aluminum alloy piezoelectric ultrasonic transducer and a 15kHZ aluminum alloy stepped horn 11. The transducer has a diameter of 70mm and a length of 165mm, and is composed of 4 PZT-8 piezoelectric chips and a 6061 aluminum alloy cylinder. The horn 11 is made of 6061 aluminum alloy, with a large end diameter of 70mm, a small end diameter of 50mm, and a length of 165mm. The rated output power of the ultrasonic vibrator is about 2000W, and the output power after pressing the surface of the guide rail is about 200W. There are 32 ultrasonic vibrators in this stress control device. 8 ultrasonic vibrators 1 are arranged on the left / right L-shaped support 8, and 16 ultrasonic vibrators 1 are arranged on the upper support plate 9.

[0039] In the present invention, 32 high-power ultrasonic power supplies are divided into two groups and placed in two 16-channel standard power supply control cabinets. According to the stress control strategy, 8 channels are defined as a stress control unit module, and the stress control device includes a total of 4 8-channel stress control unit modules. At the same time, according to the area of ​​the upper surface and left / right side surfaces of the guide rail, as well as the flange size of the ultrasonic vibrator and the area of ​​the front end surface of the amplitude transformer, the design of 32 ultrasonic vibrators can make as many vibrator end faces as possible fit with the end face of the guide rail, thereby increasing the control area and improving the control efficiency.

[0040] The kinematic pair of the guide rail needs to be rough-machined, semi-finished and fine-machined on the upper surface of the guide rail. The residual stress generated during machining is the essential reason for the deformation of the joint surface of the kinematic pair of the guide rail. As many stress control points as possible should be arranged on the upper surface to reduce and equalize stress. According to the number of control unit modules of the stress control device, the area of ​​the upper surface of the guide rail, the flange size of the ultrasonic vibrator and the area of ​​the front end face of the amplitude transformer, 16 ultrasonic vibrators are designed to make as many vibrator end faces as possible fit with the upper surface of the guide rail.

[0041] When cutting the guide rail, only the left / right end faces of the guide rail are rough-machined once. The machining residual stress generated on the two end faces is smaller than that on the upper end face, and the influence on the deformation of the guide rail as a whole is relatively small. According to the number of control unit modules of the stress control device, 8 stress control points are evenly arranged on the left / right end faces of the guide rail, and the residual stress inside the guide rail can be controlled.

[0042] Design requirements for power ultrasonic power supply: The power ultrasonic power supply selects a 15kHz digital ultrasonic power supply with automatic frequency tracking, with a rated power of 2500W, and outputs a high-voltage sinusoidal excitation signal to the ultrasonic vibrator to drive the ultrasonic vibrator to emit ultrasonic waves into the guide material. One power ultrasonic power supply is connected to an ultrasonic vibrator, and the stress control power is 200W. The power ultrasonic power supply is connected to the ultrasonic vibrator, and the power ultrasonic power supply excites the ultrasonic vibrator with a high-frequency and high-power sinusoidal wave signal, thereby causing the ultrasonic vibrator to emit high-frequency and high-power ultrasonic waves into the guide material.

[0043] The specific steps of the gray iron rail high energy acoustic beam array control method are as follows:

[0044] Step 1: Stress detection before regulation. Perform residual stress detection on the working surface of the gray iron guide rail and record the size and distribution of residual stress on the guide rail surface before stress regulation.

[0045] Step 2: Adjust the stress control device. Place the guide rail on the high-energy acoustic beam array control workbench 12 to ensure the stability of the entire stress control device. Apply high-temperature grease with coupling effect on the front end surface of each ultrasonic vibrator, adjust the left / right L-shaped support 8 and the upper support plate 9, so that all 32 ultrasonic vibrators 3 are tightly pressed against the upper surface, left end surface and right end surface of the guide rail, and the compression increment of each spring 2 is 3mm-5mm.

[0046] Step 3: Set the power ultrasonic power supply parameters. Turn on the power ultrasonic power supplies one by one, adjust the amplitude setting parameters (initial 10%), and through multiple frequency searches, make the stable working frequency of a single control channel about 15kHZ and the working power about 200W.

[0047] Step 4: Stress regulation. Stress regulation is completed in two times, with a single regulation time of 30 minutes, and a 10-minute stop in the middle for system heat dissipation and adjustment of the compression state. Specifically: After the power supply parameters are set, set the single working time of each power ultrasonic power supply to 30 minutes. Turn on the power ultrasonic power supplies one by one to start stress regulation. All power ultrasonic power supplies can also be group controlled through the upper computer, and the power ultrasonic power supplies can be synchronously turned on and off to send ultrasonic excitation signals. After the 30-minute stress regulation is completed, stop the regulation, and the stress regulation device will cool for 10 minutes before performing the second 30-minute stress regulation.

[0048] Step 5: Stress detection after adjustment. After the stress adjustment of the guide rail is completed, the guide rail is taken out from the high-energy acoustic beam array adjustment workbench 12 and placed on the stress detection workbench for stress detection after adjustment. If the stress size and distribution state of the guide rail after adjustment are still large and concentrated, repeat the stress adjustment from the second step to the fourth step until the stress of the guide rail is effectively reduced and homogenized to a low stress state, that is, the stress value is less than 30% of the yield strength of the gray iron material.

[0049] Working principle:

[0050] The ultrasonic vibrator 1, the plug bolt 2 and the spring 3 on the device form a high-energy sound beam unit, which is tightly pressed and attached to the surface of the residual stress concentration area of ​​the gray iron guide rail through the coupling medium. Driven by the power ultrasonic power supply, the high-energy sound beam unit will generate high-power ultrasonic waves (high-energy sound beams), which are incident into the inside of the guide rail through contact coupling. When the energy of the high-energy sound beam is greater than the dislocation potential energy inside the material, the residual stress field will be broken, the internal stress field will be redistributed and reach a new balance, the residual stress can be relaxed and released, and the residual stress on the surface and inside of the guide rail can be reduced and homogenized.

Claims

1. A high-energy acoustic beam array control device for residual stress of gray iron guide rail, characterized in that: It includes a plurality of high-energy sound beam units, a guide screw 5, a push screw 6, a flat base 7, a left / right L-shaped support 8, an upper support plate 9, and a power ultrasonic power supply; each high-energy sound beam unit includes an ultrasonic vibrator 3, a plug bolt 1, a spring 2, and an amplitude transformer 11; the flat base 7 includes a high-energy sound beam array control workbench 12 and a guide side 13, and the guide side 13 is arranged at the four corners of the high-energy sound beam array control workbench 12, and has a guiding effect on the forward and backward movement of the left / right L-shaped support 8, so that the support does not deviate, and ensures that the end faces of all ultrasonic vibrators on the support are parallel to the side of the guide rail, and can fit tightly during stress control work; The upper support plate 9 is provided with a guide hole at each of its four corners, and is fixed above the high-energy sound beam array control workbench 12 through a guide screw 10. The gray iron guide rail is placed in the middle of the high-energy sound beam array control workbench 12 and is located below the upper support plate 9. The upper support plate 9 is provided with a vibrator mounting hole. Each ultrasonic vibrator 3 is vertically mounted in the ultrasonic vibrator flange mounting hole arranged on the upper support plate 9 through a plug bolt 1 and a spring 2 installed on its flange structure. The left / right L-shaped support 8 is installed on both sides of the flat base 7; ultrasonic vibrator flange mounting holes are evenly arranged on the vertical plate of the left / right L-shaped support 8; the plug bolt 1 is sleeved on the spring, and each ultrasonic vibrator 3 is horizontally fixed in the vibrator mounting hole on the vertical plate of the left / right L-shaped support 8 through the plug bolt 1 and the spring 2 installed on its flange structure; four push screws 6 are respectively connected to the left / right L-shaped support 8 in pairs, and are used to push the left / right L-shaped support 8 to press against the gray iron guide rail; by rotating the four push screws 6 at both ends, the left / right L-shaped support 8 on both sides is forced to move toward the middle and clamp the guide rail, while compressing the spring 3; The power ultrasonic power supply is connected to the ultrasonic vibrator, and the power supply excites the ultrasonic vibrator with a high-frequency and high-power sinusoidal wave signal, thereby causing the ultrasonic vibrator to emit high-frequency and high-power ultrasonic waves into the guide rail material.

2. A high-energy acoustic beam array control device for residual stress of a gray iron guide rail as claimed in claim 1, characterized in that: Eight ultrasonic vibrators 1 are disposed on the left / right L-shaped supports 8 , respectively, and 16 ultrasonic vibrators 1 are disposed on the upper support plate 9 .

3. The high-energy acoustic beam array control device for residual stress of gray iron guide rail according to claim 1, characterized in that: The upper support plate 9 is provided with a lifting lug 4 .

4. A high-energy acoustic beam array control device for residual stress of a gray iron guide rail as claimed in claim 2 or 3, characterized in that: The ultrasonic vibrator is a half-wavelength vibration system with a frequency of 15 kHz. The rated output power of the ultrasonic vibrator is 2000W, and the output power after pressing the surface of the guide rail is 200W.

5. A high-energy acoustic beam array control device for residual stress of a gray iron guide rail as claimed in claim 4, characterized in that: The ultrasonic vibrator is mainly composed of a 15kHZ aluminum alloy piezoelectric ultrasonic transducer and a 15kHZ aluminum alloy stepped horn 11 .

6. A high-energy acoustic beam array control device for residual stress of a gray iron guide rail as claimed in claim 1, characterized in that: The spring specifications are selected as wire diameter 1.5mm, outer diameter 12mm, length 20mm, and 6 pieces per set.

7. A high-energy acoustic beam array control device for residual stress of a gray iron guide rail as claimed in claim 6, characterized in that: The relative compression of the spring before and after the guide rail is stress-controlled is 3mm-5mm.

8. The high-energy acoustic beam array control device for residual stress of a gray iron guide rail according to claim 1, characterized in that: The power ultrasonic power supply selects a 15kHz digital ultrasonic power supply with automatic frequency tracking and a rated power of 2500W.

9. A method for regulating residual stress of a gray iron guide rail using a gray iron guide rail residual stress high energy acoustic beam array regulating device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Stress detection before regulation: Perform residual stress detection on the working surface of the gray iron guide rail, and record the size and distribution of residual stress on the guide rail surface before stress regulation; Step 2: Place the guide rail on the high-energy acoustic beam array control workbench 12 to ensure the stability of the entire stress control device; apply high-temperature grease with coupling effect on the front end surface of each ultrasonic vibrator, adjust the left / right L-shaped support 8 and the upper support plate 9, so that all 32 ultrasonic vibrators 3 are tightly pressed against the upper surface, left end surface and right end surface of the guide rail, and the compression increment of each spring 2 is 3mm-5mm; Step 3: Set the power ultrasonic power supply parameters; turn on the power ultrasonic power supplies one by one, adjust the amplitude setting parameters, and make the stable working frequency of a single control channel 15kHZ and the working power 200W; Step 4: Stress regulation: Stress regulation is completed in two times, with a single regulation time of 30 minutes, and a 10-minute stop in the middle for system heat dissipation and adjustment of the compression state; Step 5: stress detection after adjustment; after the guide rail stress adjustment is completed, the guide rail is taken out from the high-energy acoustic beam array adjustment workbench 12 and placed on the stress detection workbench for stress detection after adjustment; if the stress size and distribution state of the guide rail after adjustment are still large and concentrated, repeat the stress adjustment from the second step to the fourth step until the guide rail stress is effectively reduced and homogenized to a low stress state, that is, the stress value is less than 30% of the yield strength of the gray iron material.

10. The method for regulating residual stress of a gray iron guide rail according to claim 9, characterized in that: In the fourth step, after the power supply parameters are set, the single working time of each power ultrasonic power supply is set to 30 minutes; the power ultrasonic power supplies are turned on one by one to start stress regulation; all power ultrasonic power supplies can also be group controlled through the upper computer, and the power ultrasonic power supplies can be synchronously turned on and stopped to send ultrasonic excitation signals; after the 30-minute stress regulation is completed, the regulation is stopped, and the stress regulation device is cooled for 10 minutes before the second 30-minute stress regulation is performed.

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