Method and device for shot peening a spiral bevel gear

Abstract

This invention discloses a shot peening method and apparatus for spiral bevel gears. The method includes: controlling a turntable to rotate at a set rotational speed, thereby driving the spiral bevel gear to rotate; controlling a spray gun to perform shot peening on the rotating spiral bevel gear according to a set spray gun posture, spray gun path, and spray gun movement speed; wherein, the spray gun posture is determined based on the impact center point of the shot on the spiral bevel gear; the spray gun path is determined based on the motion characteristics of the spiral bevel gear and the spray gun; the turntable rotational speed and spray gun movement speed are determined after speed matching based on the performance parameters of the spray gun. This invention can be applied to shot peening of gears with different inner and outer diameters, effectively avoiding the problem of uneven shot peening, while avoiding quality problems such as cracks induced by over-peening, and shortening the development cycle of gear shot peening processes.

Description

Technical Field

[0001] This invention belongs to the field of gear processing technology, and specifically relates to a shot peening method and apparatus for spiral bevel gears. Background Technology

[0002] Spiral bevel gears are key components in high-end gearboxes and reducers of engineering machinery transmission systems, playing a crucial role in reducing speed and increasing torque, as well as changing the direction of power transmission. Logarithmic spiral bevel gears, in particular, are a new type of spiral bevel gear with a conical logarithmic spiral curve as the tooth profile and an involute curve as the tooth contour curve. The angle between the tangent to the conical logarithmic spiral curve at any point on the curve and the generatrix of the cone is constant, i.e., the helix angle is constant, resulting in better transmission characteristics. The service life and performance of engineering machinery transmission systems are closely related to the surface hardness, residual stress distribution, and surface roughness of spiral bevel gears. High-speed, high-overload, high-impact, and high-temperature operating environments place extremely high demands on the quality of spiral bevel gears. Based on these high requirements, in addition to carburizing, quenching, and grinding, shot peening is commonly used to strengthen the gears and increase their fatigue strength, especially the bending fatigue strength at the tooth root.

[0003] Gear shot peening typically involves rotating the gear using a turntable while the shot gun feeds at a constant speed along the gear's axis or radial direction, thus achieving shot peening strengthening of all gear tooth roots. However, in actual shot peening process development, a common approach is to maintain a constant turntable speed and initially use a relatively fast shot gun feed speed to check for residual fluorescence on the gear surface. If fluorescence remains, the shot gun speed is gradually reduced, and the peening time is increased accordingly. The fluorescence residue is then checked again until 2% remains, which is considered 100% coverage. A typical technical requirement is 200% coverage, achieved by doubling the peening time (i.e., halving the shot gun speed). This trial-and-error method is time-consuming and labor-intensive, prone to uneven stress distribution, over-peening and under-peening, and crack initiation, which negatively impacts the improvement of the gear surface's fatigue and wear resistance. Furthermore, there is no predictable pattern when the gear's diameter or inner / outer diameter changes, requiring the entire process to be repeated. Therefore, there is an urgent need to develop a shot peening strengthening method that can shorten the development cycle of gear shot peening process while improving shot peening quality. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a method and apparatus for shot peening spiral bevel gears, which can be applied to shot peening of gears with different inner and outer diameters. It effectively avoids the problem of uneven shot peening of gears, avoids quality problems such as cracks induced by excessive shot peening, and can shorten the development cycle of gear shot peening process.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, a method for shot peening a spiral bevel gear is provided, comprising: controlling a turntable to rotate at a set turntable speed, thereby driving a spiral bevel gear to rotate; controlling a spray gun to perform shot peening on the rotating spiral bevel gear with a set spray gun posture, spray gun path, and spray gun movement speed; wherein the spray gun posture is determined based on the impact center point of the shot on the spiral bevel gear; the spray gun path is determined based on the motion characteristics of the spiral bevel gear and the spray gun; and the turntable speed and spray gun movement speed are determined after speed matching based on the performance parameters of the spray gun.

[0007] Furthermore, the impact center point is the intersection of the root region and the root region of the spiral bevel gear, and is offset towards the root region at a set distance.

[0008] Furthermore, the spray gun posture is determined based on the impact center point of the shot peening on the spiral bevel gear, including: determining the spray gun direction based on the impact direction, the projection of the impact direction on the horizontal plane being on the line connecting the adjacent tooth apex and the impact center point; determining the spray gun angle, when the impact direction is 90° with the spiral line where the impact center point is located, point P remains stationary, and in the vertical direction, the spray gun deviates from the PA line in the direction away from the tooth tip. That is, the concave surface deviates upwards. Convex surface deviates downwards Wherein, point P is the impact center, and line PA is the line connecting the apex of the adjacent tooth to the impact center. The angle between the extension of the spray gun and the PA line when the spray gun is perpendicular to the midpoint of the spiral.

[0009] Furthermore, the spray gun path is determined based on the motion characteristics of the spiral bevel gear and the spray gun, including: when the spiral bevel gear rotates with the turntable, the spray gun reciprocates above the spiral bevel gear along the spiral direction, and the path formed by the spray gun is a cone, then the spray gun path is:

[0010] ;

[0011] in, , , These are the x, y, and z coordinates corresponding to the spray gun path. Let be the distance from the starting point of the conic logarithmic spiral curve to the apex of the cone. The independent variable is denoted by , which represents the projection angle of the angle through which the impact center point rotates onto the bottom surface. It is a semi-cone angle. The helix angle of the spiral bevel gear. This is the distance from the center point of the spray gun exit to the center point of impact. The angle between the extension of the spray gun and the PA line when the spray gun is perpendicular to the midpoint of the spiral.

[0012] Furthermore, the performance parameters of the spray gun include: shot peening linear velocity. and step distance .

[0013] Furthermore, the turntable rotation speed and the spray gun movement speed are specifically as follows:

[0014] Turntable speed ;

[0015] Spray gun movement speed ;

[0016] in, Let be the diameter of a certain impact center point on the spiral bevel gear. , Let be the distance from the starting point of the conic logarithmic spiral curve to the apex of the cone. The independent variable is denoted by , which represents the projection angle of the angle through which the impact center point rotates onto the bottom surface. It is a semi-cone angle. The helix angle of the spiral bevel gear.

[0017] Furthermore, the size of the shot peening pellets is less than or equal to half the minimum fillet radius of the root radius of the spiral bevel gear.

[0018] Furthermore, the root radius (R-angle) of the spiral bevel gear is equal to the fillet radius of the cutting tool used to machine the spiral bevel gear.

[0019] Furthermore, a shot blasting gun is installed on both the concave and convex surfaces of the spiral bevel gear teeth, and shot blasting is performed on both surfaces simultaneously.

[0020] Secondly, a spiral bevel gear shot peening device is provided, comprising: a first execution module for controlling the rotation of a turntable at a set turntable speed, thereby driving the spiral bevel gear to rotate; and a second execution module for controlling a spray gun to perform shot peening on the rotating spiral bevel gear at a set spray gun posture, spray gun path, and spray gun movement speed; wherein the spray gun posture is determined based on the impact center point of the shot on the spiral bevel gear; the spray gun path is determined based on the motion characteristics of the spiral bevel gear and the spray gun; and the turntable speed and spray gun movement speed are determined after speed matching based on the performance parameters of the spray gun.

[0021] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: This invention controls the rotation of a turntable at a set rotation speed, thereby driving the spiral bevel gear to rotate; it controls the spray gun to perform shot peening on the rotating spiral bevel gear with a set spray gun posture, spray gun path, and spray gun movement speed; wherein, the spray gun posture is determined based on the impact center point of the shot on the spiral bevel gear; the spray gun path is determined based on the motion characteristics of the spiral bevel gear and the spray gun; the turntable rotation speed and spray gun movement speed are determined after speed matching based on the performance parameters of the spray gun. This invention can be applied to shot peening of gears with different inner and outer diameters, effectively avoiding the problem of uneven shot peening, while also avoiding quality problems such as cracks induced by over-peening, and shortening the development cycle of gear shot peening processes. Attached Figure Description

[0022] Figure 1 This is a schematic diagram showing the direction of the spray gun's movement and its relative position to the gear during shot peening of the driven wheel in the spiral bevel gear in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram showing the direction of the spray gun's movement and its relative position to the gear during shot peening of the drive wheel in the spiral bevel gear in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the angle of the spiral bevel gear concave spray gun in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the angle of the spiral bevel gear convex spray gun in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram showing the spray gun perpendicular to the spiral line at the midpoint when the gear is at the center line position.

[0027] Figure 6 This is a schematic diagram of the geometric relationship between the spiral curve Q0Q2 of the spray gun path and the spiral curve P0P2 of the spray point;

[0028] Figure 7 This is a schematic diagram showing the relative positions of the driven wheel and the two spray guns in an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram showing the relative positions of the drive wheel and the two spray guns in an embodiment of the present invention. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0031] Example 1:

[0032] like Figures 1-8As shown, a shot peening method for a spiral bevel gear includes: controlling a turntable to rotate at a set turntable speed, thereby driving the spiral bevel gear to rotate; controlling a spray gun to perform shot peening on the rotating spiral bevel gear with a set spray gun posture, spray gun path, and spray gun movement speed; wherein, the spray gun posture is determined based on the impact center point of the shot on the spiral bevel gear; the spray gun path is determined based on the motion characteristics of the spiral bevel gear and the spray gun; and the turntable speed and spray gun movement speed are determined after speed matching based on the performance parameters of the spray gun.

[0033] The target of shot peening for spiral bevel gears is the root portion between the pitch circle and the root circle. The key location is the R-angle of the root (because the R-angle is a stress concentration point). The center point of shot peening is the intersection of the root region and the root region, offset 1-2 mm from the root region.

[0034] The shot size should be less than or equal to half the smallest fillet radius of the left and right R-angles. Considering shot peening efficiency, it should be as close as possible to half the fillet radius of the R-angle. Determination of R-angle fillet radius: Since the R-angle of the helical bevel gear is variable and cannot be measured, it can be determined by the fillet radius of the tool used in gear machining.

[0035] Considering the concave and convex surfaces, i.e. the positions of the left and right radius corners, at least two spray guns are needed.

[0036] As the gear rotates with the turntable, the spray gun reciprocates along a spiral direction above the gear. The direction of the spray gun's movement is as follows: Figure 1 , Figure 2 As shown by the double arrows, the trajectory of the injection point is along the helix direction where the gear tooth root is located.

[0037] (1) Spray gun posture

[0038] The impact center P of the shot peening is the intersection of the tooth root region and the tooth bottom region, and is offset towards the tooth root region by 1~2mm. Since the shot peening flow is generally a stream of cylindrical shot particles with a diameter of 8mm, it can cover the entire tooth root region.

[0039] To ensure accessibility, the projection of the impact direction onto the horizontal plane lies on the line connecting the apex of the adjacent tooth and the impact center point P; for example... Figure 3 , Figure 4 As shown by the dashed line, the distance from the center point Q of the spray gun exit to the impact point P is L.

[0040] To ensure the impact direction is approximately 90° to the spiral line containing the impact center, minimizing shot peening energy loss, point P remains stationary. In the vertical direction, the direction of the spray gun away from the tooth tip deviates from line PA. That is, the concave surface deviates upwards. Convex surface deviates downwards Wherein, point P is the impact center, and line PA is the line connecting the apex of the adjacent tooth to the impact center. The angle between the extension of the spray gun and the PA line when the spray gun is perpendicular to the midpoint of the spiral.

[0041] The angle is determined by the position of the midpoint of the gear in the vertical direction, such as... Figure 5 As shown, align the spray gun perpendicular to the spiral line at the midpoint. At this point, the angle between the extended line of the spray gun and line PA is... .

[0042] (2) Spray gun path

[0043] As the gear rotates with the turntable, the spray gun reciprocates along a spiral direction above the gear. The path formed by the spray gun is a cone. Let's assume a moving point on the spray gun path is... The spray gun starts from the initial point Exercise until the point At that time, the spray gun path spiral curve and the spiral curve of the injection point Geometric relationships such as Figure 6 As shown. The parametric equation of the helix containing the tooth root is known to be:

[0044] ;

[0045] in, , , These are the x, y, and z coordinates of a point on the tooth root line. Let be the distance from the starting point of the conic logarithmic spiral curve to the apex of the cone. The independent variable is denoted by , which represents the projection angle of the angle through which the impact center point rotates onto the bottom surface; the curve is shown. At point tangent and passing through point conical generatrix The angle formed is , It is a semi-cone angle. The helix angle of the spiral bevel gear. This is the distance from the center point of the spray gun exit to the center point of impact. The angle between the extension of the spray gun and line PA when the spray gun is perpendicular to the midpoint of the spiral. The integral constant .

[0046] like Figure 6 As shown, Center point of spray gun exit If the distance from the impact point P is L, then:

[0047] ;

[0048] ;

[0049] ;

[0050] ;

[0051] .

[0052] Similarly, the spray gun path equation can be derived as follows:

[0053] ;

[0054] The path rotates by an angle around the z-axis of the xyz coordinate system. The shot peening path after rotation is:

[0055] ;

[0056] The spray gun path is as follows:

[0057] ;

[0058] in, , , These are the x, y, and z coordinates corresponding to the spray gun path. This represents the distance from the starting point to the apex of the logarithmic spiral curve of the cone (base cone). The independent variable is denoted by , which represents the projection angle of the angle through which the impact center point rotates onto the bottom surface. It is a semi-cone angle. The helix angle of the spiral bevel gear. This is the distance from the center point of the spray gun exit to the center point of impact. The angle between the extension of the spray gun and the PA line when the spray gun is perpendicular to the midpoint of the spiral.

[0059] The spray gun path equation is passed to the robot or machine tool.

[0060] (3) Matching of turntable speed and shot peening speed

[0061] shot peening linear velocity The typical shot peening speed is 90-350 mm / s, with the appropriate speed selected based on the gear hardness and surface roughness requirements. Under the same conditions, a slower shot peening speed results in a deeper strengthening depth, higher shot peening intensity, and higher fatigue life. However, it also increases surface roughness and the tendency for cracking. Therefore, a suitable shot peening speed can be selected by comprehensively considering factors such as the GA-BP neural network.

[0062] Step length The overlap is typically 2-8mm, depending on the nozzle diameter and peening distance. The nozzle diameter is generally 8mm, and the peening distance is 150mm, with a 50% overlap.

[0063] Time required for a shot-peening gear to complete one revolution: t = πD n / V 线 (t is in seconds);

[0064] Determine the gear speed: rpm = 1 / (t / 60)60 / t;

[0065] Spray gun movement speed: V 枪 =S 步 / t.

[0066] The following can be derived from the three formulas above:

[0067] Turntable speed ;

[0068] Spray gun movement speed ;

[0069] in, Let be the diameter of a certain impact center point on the spiral bevel gear. , Let be the distance from the starting point of the conic logarithmic spiral curve to the apex of the cone. The independent variable is denoted by , which represents the projection angle of the angle through which the impact center point rotates onto the bottom surface, in degrees. It is a semi-cone angle. The helix angle of the spiral bevel gear.

[0070] (4) According to this process setting, shot peening twice can achieve 200% coverage and uniform stress distribution.

[0071] The workpiece rotation speed is transmitted to the turntable, and the spray gun movement speed is transmitted to the robot or machine tool.

[0072] The technical solution of the present invention will be further explained below through a specific spiral bevel gear shot peening process.

[0073] A spiral bevel gear, consisting of a driving and driven gear, requires shot peening. The required shot peening intensity is 0.44 mmA, coverage is 200%, the residual pressure peak at 50 μm on the tooth root subsurface is -1000 MPa, and the surface roughness is Ra 2.8 μm. The gear is machined using a disc milling cutter with a main cutting edge radius of 1.7 mm. Therefore, the selected shot size is 0.8 mm, and the shot peening velocity is V. 线 It is 200 mm / s.

[0074] As the gear rotates with the turntable, the spray guns reciprocate along a spiral direction above the gears, with the two spray guns respectively spraying directly at the R-angle positions of the concave and convex surfaces, as shown in the diagram. Figure 7 , Figure 8 As shown.

[0075] (1) Spray gun posture

[0076] The impact center point P of the shot peening is located at the intersection of the tooth root region and the tooth bottom region, and is offset from the tooth root region by 1mm. The projection of the impact direction on the horizontal plane is on the line connecting the apex of the adjacent tooth and the impact center point P. The distance between the center point Q of the spray gun exit and the impact point P is 150mm.

[0077] At the midpoint of the driven wheel in the vertical direction, align the spray gun perpendicular to the spiral line at the midpoint. At this point, the angle between the extended line of the spray gun and the PA line is... The angle is 10°, with the concave side of the spray gun deviating upwards by 10° and the convex side deviating downwards by 10°.

[0078] At the midpoint of the vertical direction of the drive wheel, align the spray gun perpendicular to the spiral line at the midpoint. At this point, the angle between the extended line of the spray gun and the PA line is... The angle is 5°, with the concave side of the spray gun deviating upwards by 5° and the convex side deviating downwards by 5°.

[0079] (2) Spray gun path

[0080] The driven wheel has a helix angle of 35°. The distance 'a' from the starting point of the logarithmic helix curve of the cone (base cone) to the apex of the cone is 58.04 mm. The half-cone angle is... The angle is 65°, and L = 150 mm. It is 10°.

[0081] The shot peening path equation for the driven wheel spiral bevel gear is:

[0082] ;

[0083] ;

[0084] ;

[0085] The shot peening gun path equation of the driven wheel is transmitted to the robot or machine tool.

[0086] The driving wheel helix angle is 35°, and the distance 'a' from the starting point of the logarithmic spiral curve of the conic (base cone) to the apex of the cone is 58.04 mm.

[0087] Half cone angle The angle is 28.5°, and the length is L=150mm. It is 5°.

[0088] The shot peening path equation for the driving helical bevel gear is:

[0089] ;

[0090] ;

[0091] ;

[0092] The path equation of the active wheel shot peening gun is transmitted to the robot or machine tool.

[0093] (3) Matching of turntable speed and shot peening speed

[0094] shot peening linear velocity The shot peening speed is 200 mm / s. The shot peening distance is 150 mm, the nozzle diameter is 8 mm, and the shot peening step distance is 50%. It is 4mm.

[0095] When shot peening the driven wheel

[0096] Turntable speed rpm (r / min) = = =

[0097] Spray gun movement speed V 枪 (mm / s) = = = ;

[0098] During active wheel shot peening,

[0099] Turntable speed rpm (r / min) = = = ;

[0100] Spray gun movement speed V 枪 (mm / s) = = = = .

[0101] The workpiece rotation speed is transmitted to the turntable, and the spray gun movement speed is transmitted to the robot or machine tool.

[0102] After shot peening, follow this process setting and perform shot peening twice to achieve good results.

[0103] Coverage detection was performed on the shot-peened surface of the gear, and the coverage met the 200% image feature.

[0104] The residual stress at the tooth root was detected using X-ray diffraction, reaching -1200 MPa. The surface morphology of the shot peening was observed using a portable microscope, and no cracks or other defects were found. This demonstrates the feasibility of the gear shot peening method based on the spray gun attitude-path-velocity matching strategy designed in this invention.

[0105] This invention proposes a gear shot peening method based on an attitude-path-velocity matching strategy. It develops a method for shot peening attitude and path direction applicable to gear surfaces with different diameters and helix angles, achieving shot peening strengthening of helical and eccentric gears. This shortens the development cycle of gear shot peening processes. Simultaneously, a shot peening method matching the spray gun speed with the turntable rotation speed is developed, further solving the problem of uneven shot peening caused by inconsistent shot velocities between the inner and outer diameters during turntable rotation when peening the driving and driven gears, thus improving shot peening quality. Furthermore, since tooth root grinding is unattainable, this helical gear shot peening method can reduce tooth root roughness and also solves the problems of poor roughness and high noise associated with gears of equal height that cannot be ground.

[0106] Example 2:

[0107] Based on the spiral bevel gear shot peening method described in Embodiment 1, this embodiment provides a spiral bevel gear shot peening device, including:

[0108] The first execution module is used to control the rotation of the turntable at a set turntable speed, thereby driving the spiral bevel gear to rotate.

[0109] The second execution module is used to control the spray gun to perform shot peening on the rotating spiral bevel gear according to the set spray gun posture, spray gun path and spray gun moving speed.

[0110] The spray gun posture is determined based on the impact center point of the shot on the spiral bevel gear;

[0111] The spray gun path is determined based on the helical bevel gear and the motion characteristics of the spray gun;

[0112] The rotational speed of the turntable and the moving speed of the spray gun are determined by speed matching based on the performance parameters of the spray gun.

[0113] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for shot peening spiral bevel gears, characterized in that, include: The turntable is controlled to rotate at a set rotation speed, which in turn drives the spiral bevel gear to rotate. With the set spray gun posture, spray gun path and spray gun moving speed, the spray gun is controlled to perform shot peening operation on the rotating spiral bevel gear; The spray gun posture is determined based on the impact center point of the shot on the spiral bevel gear; The spray gun path is determined based on the helical bevel gear and the motion characteristics of the spray gun; The rotational speed of the turntable and the moving speed of the spray gun are determined by speed matching based on the performance parameters of the spray gun. The spray gun path is determined based on the motion characteristics of the spiral bevel gear and the spray gun, including: As the spiral bevel gear rotates with the turntable, the spray gun reciprocates above the spiral bevel gear along a spiral direction. The path formed by the spray gun is a cone, so the spray gun path is: ； in, , , These are the x, y, and z coordinates corresponding to the spray gun path. Let be the distance from the starting point of the conic logarithmic spiral curve to the apex of the cone. The independent variable is denoted by , which represents the projection angle of the angle through which the impact center point rotates onto the bottom surface. It is a semi-cone angle. The helix angle of the spiral bevel gear. This is the distance from the center point of the spray gun exit to the center point of impact. When the spray gun is perpendicular to the midpoint of the spiral, the angle between the extension of the spray gun and the PA line; The impact center point is the intersection of the root region and the bottom region of the spiral bevel gear, and is offset from the root region by a set distance. The performance parameters of the spray gun include: shot peening linear velocity. and step distance ; The specific values ​​for the turntable rotation speed and the spray gun movement speed are: Turntable speed ; Spray gun movement speed ; in, Let be the diameter of a certain impact center point on the spiral bevel gear. , Let be the distance from the starting point of the conic logarithmic spiral curve to the apex of the cone. The independent variable is denoted by , which represents the projection angle of the angle through which the impact center point rotates onto the bottom surface. It is a semi-cone angle. The helix angle of the spiral bevel gear.

2. The shot peening method for spiral bevel gears according to claim 1, characterized in that, The spray gun posture is determined based on the impact center point of the shot on the spiral bevel gear, including: The direction of the spray gun is determined based on the direction of impact, and the projection of the impact direction on the horizontal plane is on the line connecting the apex of the adjacent tooth and the center point of impact. Determine the spray gun angle. When the impact direction forms a 90° angle with the spiral line where the impact center point is located, point P remains stationary. In the vertical direction, the spray gun deviates from the PA line in the direction away from the tooth tip. That is, the concave surface deviates upwards. Convex surface deviates downwards Wherein, point P is the impact center, and line PA is the line connecting the apex of the adjacent tooth to the impact center. The angle between the extension of the spray gun and the PA line when the spray gun is perpendicular to the midpoint of the spiral.

3. The shot peening method for spiral bevel gears according to claim 1, characterized in that, The size of the shot peening pellets is less than or equal to half the minimum fillet radius of the root radius of the spiral bevel gear.

4. The shot peening method for spiral bevel gears according to claim 3, characterized in that, The root radius (R-angle) of the spiral bevel gear is equal to the fillet radius of the cutting tool used to machine the spiral bevel gear.

5. The shot peening method for spiral bevel gears according to claim 1, characterized in that, A shot blasting gun is installed on both the concave and convex surfaces of the spiral bevel gear teeth, and shot blasting is performed on both surfaces simultaneously.

6. A spiral bevel gear shot peening device, characterized in that, include: The first execution module is used to control the rotation of the turntable at a set turntable speed, thereby driving the spiral bevel gear to rotate. The second execution module is used to control the spray gun to perform shot peening on the rotating spiral bevel gear according to the set spray gun posture, spray gun path and spray gun moving speed. The spray gun posture is determined based on the impact center point of the shot on the spiral bevel gear; The spray gun path is determined based on the helical bevel gear and the motion characteristics of the spray gun; The rotational speed of the turntable and the moving speed of the spray gun are determined by speed matching based on the performance parameters of the spray gun. The spray gun path is determined based on the motion characteristics of the spiral bevel gear and the spray gun, including: As the spiral bevel gear rotates with the turntable, the spray gun reciprocates above the spiral bevel gear along a spiral direction. The path formed by the spray gun is a cone, so the spray gun path is: ； in, , , These are the x, y, and z coordinates corresponding to the spray gun path. Let be the distance from the starting point of the conic logarithmic spiral curve to the apex of the cone. The independent variable is denoted by , which represents the projection angle of the angle through which the impact center point rotates onto the bottom surface. It is a semi-cone angle. The helix angle of the spiral bevel gear. This is the distance from the center point of the spray gun exit to the center point of impact. When the spray gun is perpendicular to the midpoint of the spiral, the angle between the extension of the spray gun and the PA line; The impact center point is the intersection of the root region and the bottom region of the spiral bevel gear, and is offset from the root region by a set distance. The performance parameters of the spray gun include: shot peening linear velocity. and step distance ; The specific values ​​for the turntable rotation speed and the spray gun movement speed are: Turntable speed ; Spray gun movement speed ; in, Let be the diameter of a certain impact center point on the spiral bevel gear. , Let be the distance from the starting point of the conic logarithmic spiral curve to the apex of the cone. The independent variable is denoted by , which represents the projection angle of the angle through which the impact center point rotates onto the bottom surface. It is a semi-cone angle. The helix angle of the spiral bevel gear.

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