High-speed gear shaft forge piece correcting device and method thereof

Abstract

The invention discloses a high-speed gear shaft forge piece correcting device and method, and belongs to the technical field of part machining. The high-speed gear shaft forge piece correcting device comprises a clamping mechanism, a pressure mechanism and a pressing block and further comprises an extrusion structure, the extrusion structure comprises a sliding rod, a connecting block and an extrusion gear, the pressing block is provided with a sliding hole perpendicular to the axial direction of a gear shaft, the sliding rod is in sliding connection with the sliding hole, and the connecting block is connected with the sliding rod; the detection part is used for detecting the displacement of the sliding rod in the axial direction of the sliding hole; the driving part is used for driving the extrusion gear to move in the axial direction of the gear shaft; the controller determines the maximum bending deformation position of the gear shaft on the tooth surface section according to the maximum displacement of the sliding rod, so that the driving part is controlled to drive the gear to slide to the maximum bending deformation position of the tooth surface section, and then the pressure mechanism is controlled to apply pressure to the gear shaft. According to the high-speed gear shaft forge piece correcting device, in the process of correcting the tooth surface section of the gear shaft, damage to the tooth surface section of the gear shaft caused by too large local pressure of the tooth surface section of the gear shaft can be avoided.

Description

Technical Field

[0001] This invention relates to the field of parts processing technology, specifically to a straightening device and method for high-speed gear shaft forgings. Background Technology

[0002] High-speed gear shafts are core transmission components in heavy machinery, ships, and generator sets. Their transmission accuracy directly determines the overall operational stability and service life of the equipment, thus requiring extremely high dimensional accuracy and straightness. These components are typically formed using hot forging. During hot forging and the subsequent cooling stage, the forgings are prone to bending deformation due to multiple factors, including thermal stress, metal microstructure transformation, and residual stress release. If the deformation exceeds the allowable range and is not corrected, it will not only lead to uneven distribution of subsequent machining allowances and reduced machining efficiency, but also cause increased transmission noise and accelerated wear after assembly and use. In severe cases, it can directly cause component failure and subsequent equipment malfunction. Therefore, the straightening process is an indispensable and crucial step in the production process of high-speed gear shaft forgings.

[0003] Currently, most existing gear shaft forging straightening devices adopt the traditional structure of pressure straightening combined with dial indicator detection. The working principle is as follows: the dial indicator accurately locates the bending deformation position and deformation amount of the gear shaft, and then the forging is supported at multiple points with pad blocks. The extrusion head of the press applies reverse extrusion force to the bending deformation area, causing the gear shaft to deform in the opposite direction, and finally achieving the straightening purpose.

[0004] However, in practical production applications, such devices have certain technical limitations when used for forgings of high-speed gear shafts with long tooth surfaces. After forging, in addition to overall bending deformation, these gear shafts are prone to local bending deformation on the tooth surface due to factors such as uneven distribution of metal structure in the tooth area and differences in the shrinkage rate between the tooth surface and the shaft body during cooling. When using existing pressure straightening devices to correct this type of deformation, during the inspection stage, due to the tooth surface structure of the gear shaft, the outer edge of the tooth surface is not continuous, making it difficult for the dial indicator probe to directly and accurately measure the curvature of the tooth surface. During the pressure application stage, the extrusion head of the press directly acts on the tooth surface of the gear shaft to apply reverse extrusion force. However, the extrusion force required for straightening is usually large. This large pressure directly acts on the tooth surface, easily causing secondary damage such as tooth surface abrasion and tooth profile distortion, affecting the original accuracy of the teeth and leading to a decrease in the transmission accuracy of the straightened gear shaft. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems in the prior art and provide a high-speed gear shaft forging straightening device that can prevent damage to the gear shaft tooth surface during the straightening process.

[0006] This invention provides a straightening device for high-speed gear shaft forgings, including a clamping mechanism, a pressure mechanism, and a pressure block. The clamping mechanism is used to clamp and drive the gear shaft to rotate about its own axial direction. The pressure block is connected to the pressure mechanism. The device also includes: The extrusion structure includes a slide rod, a connecting block, and an extrusion gear. The extrusion block has a sliding hole perpendicular to the gear shaft axis. The slide rod is slidably connected to the sliding hole. The connecting block is connected to the slide rod. When the pressure mechanism applies pressure, the extrusion block can abut against the connecting block. The extrusion gear is rotatably connected to the connecting block. The extrusion gear meshes with the tooth surface section of the gear shaft. The axial direction of the extrusion gear is parallel to the axial direction of the gear shaft. The detection unit, connected to the slide rod, is used to detect the displacement of the slide rod along the axial direction of the slide hole; The drive unit, connected to the pressure mechanism, is used to drive the extrusion gear to move axially along the gear shaft; The controller is electrically connected to the detection unit, the pressure mechanism, and the drive unit. The controller determines the point of maximum bending deformation of the gear shaft on the tooth surface section based on the maximum displacement of the slide rod, thereby controlling the drive unit to drive the gear to slide to the point of maximum bending deformation on the tooth surface section. Then, the controller controls the pressure mechanism to drive the pressure block to move radially along the gear shaft towards the side closer to the gear shaft in order to apply pressure to the gear shaft.

[0007] Preferably, the pressure block is provided with two identical extrusion structures, which are symmetrically arranged relative to the central axis of the gear shaft. The gear of each extrusion structure is meshed with the tooth surface of the gear shaft. The slide rod of each extrusion structure is connected to a detection unit. The controller is electrically connected to the clamping mechanism. The controller controls the clamping mechanism to drive the gear shaft to rotate. When the clamping mechanism drives the gear shaft to rotate until the displacement of the two slide rods towards the side closer to the pressure block is the same and the maximum, the controller controls the clamping mechanism to stop rotating and then controls the pressure mechanism to apply pressure.

[0008] Preferably, the pressure block is provided with a rack, the rack is fixedly connected to the pressure block, and the area of ​​the upper end face of the connecting block is larger than the area of ​​the cross-section of the slide rod. During the pressure application process of the pressure mechanism, the slide rod slides along the axial direction of the sliding hole towards the side of the pressure block until the upper end face of the connecting block abuts against the lower end face of the pressure block. At this point, the rack engages with the extrusion gear, and the rack restricts the rotation of the extrusion gear.

[0009] Preferably, the detection unit includes a sleeve and a pressure sensor. The sleeve is connected to the pressure block, and the axial direction of the sleeve is parallel to the axial direction of the sliding hole. One end of the sliding rod is slidably connected to the inner cavity of the sleeve. The pressure sensor is disposed in the inner cavity of the sleeve. A spring is disposed in the inner cavity of the sleeve. One end of the spring abuts against the end of the sliding rod, and the other end of the spring abuts against the pressure sensor. The spring is used to apply an elastic force toward the gear shaft side to the sliding rod. The pressure sensor is used to detect the real-time elastic force of the spring. The controller is electrically connected to the pressure sensor, and the controller calculates the displacement of the sliding rod based on the spring constant and the real-time elastic force.

[0010] Preferably, the cross-section of the slide rod is non-circular, the inner wall of the sliding hole matches the outer wall of the slide rod, and the sliding hole can restrict the slide rod from rotating axially around the sliding hole.

[0011] Preferably, a support mechanism is provided on each side of the pressure block. When the total runout of the gear shaft tooth surface section is zero, the shaft diameters at both ends of the gear shaft tooth surface section abut against the two support mechanisms respectively. The support mechanisms are used to apply a supporting force toward the side of the pressure block to the shaft diameter of the gear shaft.

[0012] Preferably, the hardness value of the extruded gear tooth surface is lower than the hardness value of the gear shaft tooth surface section.

[0013] Preferably, the extrusion gear is detachably connected to the connecting block, and the extrusion gear comes in various specifications with different modules.

[0014] Preferably, the pressure mechanism is a hydraulic mechanism.

[0015] The present invention also provides a method for straightening gear shafts using a high-speed gear shaft forging straightening device, comprising the following steps: The high-speed gear shaft forging is clamped in the clamping mechanism to make the gear shaft axis parallel to the extruded gear axis, ensuring that the gear shaft and the extruded gear have the same module and mesh with each other. The clamping mechanism drives the gear shaft to rotate around its own axis. When the tooth surface of the gear shaft bends and deforms, the squeezed gear slides along the axis of the sliding hole with the undulation of the gear shaft, thereby pushing the slide rod to slide. The greater the deformation, the greater the displacement of the slide rod. The detection unit collects the real-time displacement of the slide bar and transmits it to the controller. The controller analyzes the full circumferential displacement change of the same cross section of the gear shaft, captures the maximum displacement of the slide bar, and then drives the pressure mechanism to move axially through the drive unit to determine the maximum bending deformation of the entire tooth surface section of the gear shaft and the corresponding axial position. The controller controls the pressure mechanism to apply pressure, and the pressure mechanism drives the pressure block to move closer to the gear shaft until the pressure block abuts against the connecting block. The pressure applied by the pressure mechanism is transmitted to the extrusion gear, and the extrusion gear transmits the pressure to the deformed part of the gear shaft tooth surface through the meshing surface, thereby correcting the tooth surface of the gear shaft.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The high-speed gear shaft forging straightening device of the present invention drives the gear shaft to slowly rotate around its own axis through the clamping mechanism. The extrusion gear continuously meshes with the tooth surface and slides axially along the sliding hole with slight undulations of the tooth surface. If there is bending deformation in the tooth surface section, it will generate axial thrust on the extrusion gear, causing the slide rod to slide synchronously. The more obvious the deformation, the greater the displacement of the slide rod. The detection unit collects displacement data in real time and transmits it to the controller. The controller analyzes the circumferential displacement change, captures the maximum displacement, and then drives the pressure mechanism to move axially through the drive unit to accurately locate the maximum bending deformation and corresponding axial position of the entire tooth surface section. The controller drives the pressure mechanism and the extrusion structure to move axially, so that the extrusion gear is aligned with the maximum deformation point. The pressure mechanism drives the pressure block to move radially closer to the shaft body, and the slide rod slides relative to the sliding hole until the pressure block abuts against the connecting block. The pressure is transmitted to the deformation point through the connecting block and the extrusion gear through the tooth surface meshing, and is evenly applied to the tooth root and tooth surface bearing area, avoiding local stress concentration and preventing tooth surface damage and tooth shape distortion of the gear shaft tooth surface section during straightening. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the AA surface of the present invention; Figure 4 This is a schematic diagram of the first working state of the pressing block of the present invention; Figure 5 This is a schematic diagram of the second working state of the extrusion gear of the present invention; Figure 6 This is a schematic diagram of the second working state of the pressing block of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Gear shaft; 101. Clamping mechanism; 102. Pressure mechanism; 103. Pressure block; 104. Slide rod; 105. Connecting block; 106. Extrusion gear; 107. Detection unit; 108. Drive unit; 2. Rack; 301. Sleeve; 302. Pressure sensor; 303. Spring; 4. Support mechanism. Detailed Implementation

[0019] The following is in conjunction with the appendix Figures 1-6 The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] like Figures 1-6 As shown, the present invention provides a high-speed gear shaft 1 forging straightening device, including a clamping mechanism 101, a pressure mechanism 102, and a pressure block 103. The clamping mechanism 101 is used to clamp and drive the gear shaft 1 to rotate around its own axial direction. The pressure block 103 is connected to the pressure mechanism 102. It also includes a pressing structure, a detection unit 107, a driving unit 108, and a controller. The pressing structure includes a slide rod 104, a connecting block 105, and a pressing gear 106. The pressure block 103 has a sliding hole perpendicular to the axial direction of the gear shaft 1. The slide rod 104 is slidably connected to the sliding hole. The connecting block 105 is connected to the slide rod 104. When the pressure mechanism 102 applies pressure, the pressure block 103 can abut against the connecting block 105. The pressing gear 106 is rotatably connected to the connecting block 105. The tooth surface section of gear shaft 1 is toothed, and the axial direction of the extrusion gear 106 is parallel to the axial direction of gear shaft 1. The detection unit 107 is connected to the slide rod 104 and is used to detect the displacement of the slide rod 104 along the axial direction of the sliding hole. The drive unit 108 is connected to the pressure mechanism 102 and is used to drive the extrusion gear 106 to move along the axial direction of gear shaft 1. The controller is electrically connected to the detection unit 107, the pressure mechanism 102 and the drive unit 108. The controller determines the maximum bending deformation point of gear shaft 1 at the tooth surface section based on the maximum displacement of the slide rod 104, thereby controlling the drive unit 108 to drive the gear to slide to the maximum bending deformation point at the tooth surface section, and then controlling the pressure mechanism 102 to drive the pressure block 103 to move radially towards the side closer to gear shaft 1 to apply pressure to gear shaft 1.

[0021] The working principle of the above embodiments is briefly described below: The components of this device work together to detect and correct the bending deformation of the tooth surface section of the high-speed gear shaft 1. The clamping mechanism 101 can be a three-jaw chuck with a power unit. The gear shaft 1 is clamped in the three-jaw chuck, which is rotatably connected to the frame of the entire correction device. The power unit drives the three-jaw chuck to rotate, thereby driving the gear shaft 1 to rotate around its own axis. This clamps the gear shaft 1 and drives it to rotate around its own axis, providing a basis for deformation detection of the entire tooth surface section of the gear shaft 1. The pressure mechanism 102 can be a hydraulic press or similar equipment. The pressure mechanism 102 applies radial correction force through the pressure block 103. The extrusion gear 106 of the extrusion structure precisely meshes with the tooth surface section of the gear shaft 1, serving as both an adaptation carrier for deformation detection and protection of the tooth surface section of the gear shaft 1 during correction. The detection unit 107 can be a contact or non-contact displacement sensor to detect the axial displacement of the slide rod 104 along the sliding hole. The drive unit 108 can be a hydraulic cylinder or an electric rail or similar equipment to drive the pressure mechanism 102 to move axially along the gear shaft 1.

[0022] Before correction, the high-speed gear shaft 1 forging is clamped in the clamping mechanism 101 to ensure that it is firmly clamped and that the shaft surface is not damaged. At the same time, the clamping posture is adjusted so that the axis of the gear shaft 1 is parallel to the axis of the extrusion gear 106, ensuring that the module of the extrusion gear 106 is consistent with the module of the gear shaft 1, that the tooth surface of the extrusion gear 106 meshes tightly with the tooth surface section of the gear shaft 1, and that the slide rod 104 slides smoothly without jamming the sliding hole of the pressure block 103.

[0023] During the deformation detection and positioning stage, the clamping mechanism 101 drives the gear shaft 1 to slowly rotate around its own axis. The pressing gear 106 maintains continuous meshing with the tooth surface section of the gear shaft 1. (Although the tooth surface section of the gear shaft 1 experiences slight undulations during rotation, the pressing gear 106 slides along the axial direction of the sliding hole due to these undulations. Therefore, the slight undulations of the tooth surface section of the gear shaft 1 have little impact on the continuous meshing between the pressing gear 106 and the gear shaft 1.) Since the pressing gear 106 is connected to the slide rod 104 via the connecting block 105, the slide rod 104 can slide along the axial direction of the sliding hole on the pressure block 103. When there is bending deformation in the tooth surface section of the gear shaft 1, the rotation of the gear shaft 1 will generate a thrust along the axial direction of the sliding hole on the pressing gear 106, thereby driving the slide rod 104 to slide along the axial direction of the sliding hole. The more obvious the bending deformation of the gear shaft 1, the greater the displacement of the slide rod 104 (generated when the slide rod 104 slides). The detection unit 107 collects the displacement data of the slide bar 104 in real time and transmits it to the controller. The controller analyzes the displacement changes during the full circumferential rotation process to accurately capture the maximum displacement of the slide bar 104 when the gear shaft 1 rotates once. Then, the drive unit 108 drives the pressure mechanism 102 to move along the axial direction of the gear shaft 1, thereby determining the maximum bending deformation and the corresponding axial position (the point of maximum bending deformation) of the entire tooth surface section of the gear shaft 1. Through the mutual meshing of the extrusion gear 106 and the gear shaft 1, the bending deformation of the gear shaft 1 is converted into a quantifiable and stable displacement of the slide bar 104, achieving precise positioning of the deformation point. Moreover, the entire process is carried out through the meshing contact of the gears, preventing the slide bar 104 from continuously fluctuating with the undulations of the tooth tip and tooth root, thus ensuring the accuracy of the detection of the circular runout of the tooth surface section of the gear shaft 1.

[0024] After positioning is completed, the controller activates the drive unit 108, driving the pressure mechanism 102 and the connected extrusion structure to move axially along the gear shaft 1 until the extrusion gear 106 is precisely aligned with the maximum bending deformation point of the gear shaft 1 tooth surface section. At this time, the controller controls the pressure mechanism 102 to move, driving the pressure block 103 to move radially along the gear shaft 1 towards the side closer to the shaft body. The slide rod 104 of the pressure block 103 continues to slide relative to the sliding hole until the pressure block 103 abuts against the connecting block 105. The pressure mechanism 102 applies extrusion force towards the gear shaft 1 to the connecting block 105 through the pressure block 103, which is then transmitted to the gear shaft 1 tooth surface section by the extrusion gear 106 through tooth surface meshing. Because the tooth surface of the extrusion gear 106 meshes precisely with the tooth surface section of the gear shaft 1, the force-bearing area of ​​the tooth surface section of the gear shaft 1 can be increased, so that the corrective force can be evenly applied to the tooth root and tooth surface bearing area at the deformation point of the tooth surface section of the gear shaft 1, avoiding local stress concentration. This ensures that the tooth surface section of the gear shaft 1 is under pressure smoothly and will not cause problems such as scratches or tooth shape distortion on the tooth surface section of the gear shaft 1.

[0025] The high-speed gear shaft 1 forging straightening device of the present invention can ensure the accuracy of the detection of the circular runout of the gear shaft 1 tooth surface section by precisely meshing the tooth surface of the extrusion gear 106 with the tooth surface section of the gear shaft 1, thereby ensuring the accurate positioning of the maximum bending deformation point of the gear shaft 1 tooth surface section. During the force application process, the meshing surfaces of the extrusion gear 106 and the gear shaft 1 are closely fitted, and the straightening force is evenly distributed throughout the meshing area, avoiding damage to the tooth surface section of the gear shaft 1 caused by excessive local pressure.

[0026] Based on the above embodiments, in order to make the force on the tooth surface section of gear shaft 1 more uniform and avoid shaft displacement during the correction process, the correction accuracy and stability are further improved.

[0027] like Figure 3 , Figure 4 and Figure 6 As shown, the pressure block 103 is provided with two identical extrusion structures. The two extrusion structures are symmetrically arranged with respect to the central axis of the gear shaft 1. The gear of each extrusion structure is meshed with the tooth surface of the gear shaft 1. Each slide rod 104 of the extrusion structure is connected to a detection unit 107. The controller is electrically connected to the clamping mechanism 101. The controller controls the clamping mechanism 101 to drive the gear shaft 1 to rotate. When the clamping mechanism 101 drives the gear shaft 1 to rotate until the displacement of the two slide rods 104 towards the side closer to the pressure block 103 is the same and the maximum, the controller controls the clamping mechanism 101 to stop rotating and then controls the pressure mechanism 102 to apply pressure.

[0028] Two identical extrusion structures are installed on the pressure block 103, ensuring that they are symmetrically distributed relative to the central axis of the gear shaft 1. The dual extrusion gears 106 mesh synchronously with the tooth surface section of the gear shaft 1. Each slide rod 104 is connected to a corresponding detection unit 107. The controller and the clamping mechanism 101 establish signal linkage. The clamping mechanism 101 drives the gear shaft 1 to rotate, and the dual extrusion gears 106 mesh synchronously with the tooth surface section of the gear shaft 1, causing the corresponding slide rod 104 to slide. The dual detection units 107 collect displacement data in real time and transmit it to the controller. When the controller detects that the displacement of the two slide rods 104 towards the side closer to the pressure block 103 is the same and both have reached their maximum values, it indicates that the maximum bending deformation of the gear shaft 1 is exactly at the symmetrical center of the dual extrusion structure, and the circumferential position is precisely aligned. The controller immediately commands the clamping mechanism 101 to stop rotating. This design eliminates the error of single-sided detection through symmetrical detection, achieving precise positioning of the deformation area in both the circumferential and axial directions. At this time, the controller controls the pressure mechanism 102 to apply pressure, ensuring that the pressure applied by the pressure mechanism 102 is collinear with and opposite to the bending deformation direction of the gear shaft 1 tooth surface section, thereby ensuring the correction effect. Moreover, the double extrusion structure can transmit the correction force synchronously during correction, making the gear shaft 1 tooth surface section more uniformly stressed, avoiding shaft offset during correction, and further improving correction accuracy and stability.

[0029] As a preferred option, such as Figures 1-6 As shown, the pressure block 103 is equipped with a rack 2, which is fixedly connected to the pressure block 103. The area of ​​the upper end face of the connecting block 105 is larger than the cross-sectional area of ​​the slide rod 104. During the pressure application process of the pressure mechanism 102, the slide rod 104 slides along the axial direction of the sliding hole towards the side of the pressure block 103 until the upper end face of the connecting block 105 abuts against the lower end face of the pressure block 103. At this point, the rack 2 engages with the extrusion gear 106, and the rack 2 restricts the rotation of the extrusion gear 106. The pressure mechanism 102 applies pressure to drive the pressure block 103 to move downward, and the slide rod 104 slides along the axial direction of the sliding hole towards the side of the pressure block 103, driving the connecting block 105 to move upward synchronously until the upper end face of the connecting block 105 abuts tightly against the lower end face of the pressure block 103. At this point, the rack 2 is precisely engaged with the extrusion gear 106. The rack 2 restricts the rotation of the extrusion gear 106 through toothed joints, keeping the extrusion gear 106 in a fixed position and meshing with the tooth surface section of the gear shaft 1. This prevents the extrusion gear 106 from rotating under the action of the corrective force, thereby preventing relative sliding between the tooth surface of the extrusion gear 106 and the tooth surface of the gear shaft 1, and thus preventing the tooth surface of the gear shaft 1 from being scratched. At the same time, the fixed extrusion gear 106 can form a rigid support, allowing the corrective force to be transmitted more accurately to the deformed area, improving the stability of the corrective effect, and preventing the tooth profile distortion of the gear shaft 1.

[0030] As a preferred option, such as Figure 3 , Figure 4 and Figure 6As shown, the detection unit 107 includes a sleeve 301 and a pressure sensor 302. The sleeve 301 is connected to the pressure block 103, and the axial direction of the sleeve 301 is parallel to the axial direction of the sliding hole. One end of the sliding rod 104 is slidably connected to the inner cavity of the sleeve 301. The pressure sensor 302 is located in the inner cavity of the sleeve 301. A spring 303 is provided in the inner cavity of the sleeve 301. One end of the spring 303 abuts against the end of the sliding rod 104, and the other end of the spring 303 abuts against the pressure sensor 302. The spring 303 is used to apply an elastic force toward the gear shaft 1 side to the sliding rod 104. The pressure sensor 302 is used to detect the real-time elastic force of the spring 303. The controller is electrically connected to the pressure sensor 302, and the controller calculates the displacement of the sliding rod 104 based on the elastic coefficient of the spring 303 and the real-time elastic force. During the detection process, the spring 303 inside the detection unit 107 continuously applies an elastic force towards the gear shaft 1 on the slide rod 104, ensuring a tight meshing between the tooth surface of the extrusion gear 106 and the tooth surface of the gear shaft 1. When the slide rod 104 slides with the extrusion gear 106, the spring 303 compresses or stretches, causing a change in the elastic force of the spring 303. The pressure sensor 302 detects this elastic force in real time and transmits it to the controller. Based on the preset elastic coefficient and the real-time elastic force, the controller accurately calculates the displacement of the slide rod 104 (F=k*x, where F is the increment of the real-time elastic force of the spring 303, k is the elastic coefficient of the spring 303, and x is the increment of the compression of the spring 303, which is also the displacement of the slide rod 104). Compared to direct displacement detection, this design uses the spring 303 to buffer and reduce the interference of undulations in the tooth surface of the gear shaft 1 on the detection signal, improving the accuracy of detecting minute displacements. At the same time, the elastic force of the spring 303 can adaptively adjust the meshing pressure, avoiding hard contact damage to the tooth surface of the gear shaft 1, thus balancing detection accuracy and protection of the tooth surface of the gear shaft 1.

[0031] As a preferred option, such as Figures 2-4 As shown, the cross-section of the slide rod 104 is non-circular, and the inner wall of the sliding hole matches the outer wall of the slide rod 104. The sliding hole restricts the slide rod 104 from rotating axially around the sliding hole. Driven by the extrusion gear 106, the slide rod 104 slides along the sliding hole. The non-circular structure effectively restricts the slide rod 104 from rotating axially, thus preventing the connecting block 105 and the extrusion gear 106 from rotating with the slide rod 104. This ensures that the extrusion gear 106 always maintains a preset posture and meshes with the tooth surface section of the gear shaft 1, preventing meshing misalignment due to rotation. This ensures the accuracy of the detection data and the stability of the correction force transmission, preventing damage and correction errors caused by meshing deviations between the two tooth surfaces.

[0032] As a preferred option, such as Figures 1-3As shown, the high-speed gear shaft 1 forging straightening device as described in claim 1 is characterized in that a support mechanism 4 is provided on each side of the pressure block 103. When the total runout of the gear shaft 1 tooth surface section is zero, the shaft diameters at both ends of the gear shaft 1 tooth surface section abut against the two support mechanisms 4 respectively. The support mechanisms 4 are used to apply a supporting force towards one side of the pressure block 103 to the shaft diameters of the gear shaft 1. The support mechanisms 4 are always in contact with the shaft diameters at both ends of the gear shaft 1, providing radial support force, balancing the straightening force applied by the pressure mechanism 102 during the straightening process, preventing the gear shaft 1 from tilting or shifting due to unilateral force, and ensuring that the gear shaft 1 tooth surface section is always in a horizontal straightening state. At the same time, the supporting force can help fix the position of the gear shaft 1, reduce the shaking of the gear shaft 1 shaft body during the straightening process, and improve the deformation positioning accuracy and straightening effect.

[0033] As a preferred option, such as Figures 1-6 As shown, the hardness value of the tooth surface of the extrusion gear 106 is lower than that of the tooth surface section of the gear shaft 1. During the meshing detection and correction process between the extrusion gear 106 and the tooth surface section of the gear shaft 1, due to the hardness difference, even if there is slight meshing pressure or relative friction, only a small amount of wear will occur on the tooth surface of the extrusion gear 106, and it will not cause scratches, indentations or other damage to the tooth surface section of the gear shaft 1, which has higher hardness. At the same time, the slight deformation of the extrusion gear 106 can enhance the meshing fit and improve the protection of the tooth surface section of the gear shaft 1.

[0034] As a preferred option, such as Figures 1-6 As shown, the extrusion gear 106 is detachably connected to the connecting block 105. The extrusion gear 106 comes in various specifications, with different modules for different specifications. The corresponding extrusion gear 106 can be quickly replaced according to the module of the gear shaft 1 to be corrected, thereby adapting to the correction work of different gear shafts 1 and improving the applicability of the entire device.

[0035] As a preferred option, such as Figures 1-3 As shown, the pressure mechanism 102 is a hydraulic mechanism. The hydraulic mechanism drives the pressure block 103 to move downward by smoothly applying pressure. Compared with mechanical pressure, hydraulic pressure has the advantages of uniform pressure output, precise adjustment, and good buffering, which can avoid damage to the tooth surface of the gear shaft 1 caused by instantaneous pressure impact.

[0036] The present invention also provides a method for straightening gear shaft 1 using a high-speed gear shaft 1 forging straightening device, comprising the following steps: The high-speed gear shaft 1 forging is clamped in the clamping mechanism 101, so that the axis of gear shaft 1 is parallel to the axis of extrusion gear 106, ensuring that the gear shaft 1 and extrusion gear 106 have the same module and mesh with each other. The clamping mechanism 101 drives the gear shaft 1 to rotate around its own axis. When the tooth surface section of the gear shaft 1 is bent and deformed, the extrusion gear 106 slides along the sliding hole axis with the undulation of the gear shaft 1, thereby pushing the slide rod 104 to slide. The greater the deformation, the greater the displacement of the slide rod 104. The detection unit 107 collects the real-time displacement of the slide bar 104 and transmits it to the controller. The controller analyzes the full circumferential displacement change of the same section of the gear shaft 1, captures the maximum displacement of the slide bar 104, and then drives the pressure mechanism 102 to move axially through the drive unit 108 to determine the maximum bending deformation of the entire tooth surface section of the gear shaft 1 and the corresponding axial position. The controller controls the pressure mechanism 102 to apply pressure. The pressure mechanism 102 drives the pressure block 103 to move closer to the gear shaft 1 until the pressure block 103 abuts against the connecting block 105. The pressure applied by the pressure mechanism 102 is transmitted to the extrusion gear 106. The extrusion gear 106 transmits the pressure to the deformed part of the tooth surface section of the gear shaft 1 through the meshing surface, thereby correcting the tooth surface section of the gear shaft 1.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A straightening device for high-speed gear shaft forgings, comprising a clamping mechanism, a pressure mechanism, and a pressure block, wherein the clamping mechanism is used to clamp and drive the gear shaft to rotate about its own axial direction, and the pressure block is connected to the pressure mechanism, characterized in that, Also includes: The extrusion structure includes a slide rod, a connecting block, and an extrusion gear. The extrusion block has a sliding hole perpendicular to the gear shaft axis. The slide rod is slidably connected to the sliding hole. The connecting block is connected to the slide rod. When the pressure mechanism applies pressure, the extrusion block can abut against the connecting block. The extrusion gear is rotatably connected to the connecting block. The extrusion gear meshes with the tooth surface section of the gear shaft. The axial direction of the extrusion gear is parallel to the axial direction of the gear shaft. The detection unit, connected to the slide rod, is used to detect the displacement of the slide rod along the axial direction of the slide hole; The drive unit, connected to the pressure mechanism, is used to drive the extrusion gear to move axially along the gear shaft; The controller is electrically connected to the detection unit, the pressure mechanism, and the drive unit. The controller determines the point of maximum bending deformation of the gear shaft on the tooth surface section based on the maximum displacement of the slide rod, thereby controlling the drive unit to drive the gear to slide to the point of maximum bending deformation on the tooth surface section. Then, the controller controls the pressure mechanism to drive the pressure block to move radially along the gear shaft towards the side closer to the gear shaft in order to apply pressure to the gear shaft.

2. The high-speed gear shaft forging straightening device as described in claim 1, characterized in that, The pressure block is provided with two identical extrusion structures, which are symmetrically arranged relative to the central axis of the gear shaft. The gear of each extrusion structure is meshed with the tooth surface of the gear shaft. The slide rod of each extrusion structure is connected to a detection unit. The controller is electrically connected to the clamping mechanism. The controller controls the clamping mechanism to drive the gear shaft to rotate. When the clamping mechanism drives the gear shaft to rotate until the displacement of the two slide rods towards the side closer to the pressure block is the same and the maximum, the controller controls the clamping mechanism to stop rotating and then controls the pressure mechanism to apply pressure.

3. The high-speed gear shaft forging straightening device as described in claim 2, characterized in that, The pressure block is provided with a rack, which is fixedly connected to the pressure block. The area of ​​the upper end face of the connecting block is larger than the cross-sectional area of ​​the slide rod. During the pressure application process of the pressure mechanism, the slide rod slides along the sliding hole axially towards the side of the pressure block until the upper end face of the connecting block abuts against the lower end face of the pressure block. At this point, the rack engages with the extrusion gear, and the rack restricts the rotation of the extrusion gear.

4. The high-speed gear shaft forging straightening device as described in claim 2, characterized in that, The detection unit includes a sleeve and a pressure sensor. The sleeve is connected to the pressure block, and the axial direction of the sleeve is parallel to the axial direction of the sliding hole. One end of the sliding rod is slidably connected to the inner cavity of the sleeve. The pressure sensor is located in the inner cavity of the sleeve. A spring is provided in the inner cavity of the sleeve. One end of the spring abuts against the end of the sliding rod, and the other end of the spring abuts against the pressure sensor. The spring is used to apply an elastic force toward the gear shaft side to the sliding rod. The pressure sensor is used to detect the real-time elastic force of the spring. The controller is electrically connected to the pressure sensor, and the controller calculates the displacement of the sliding rod based on the spring constant and the real-time elastic force.

5. The high-speed gear shaft forging straightening device as described in claim 1, characterized in that, The cross-section of the slide rod is non-circular, and the inner wall of the sliding hole matches the outer wall of the slide rod. The sliding hole can restrict the slide rod from rotating axially around the sliding hole.

6. The high-speed gear shaft forging straightening device as described in claim 1, characterized in that, Each side of the pressure block is provided with a support mechanism. When the total runout of the gear shaft tooth surface section is zero, the shaft diameters at both ends of the gear shaft tooth surface section abut against the two support mechanisms respectively. The support mechanisms are used to apply a supporting force toward the side of the pressure block to the shaft diameter of the gear shaft.

7. The high-speed gear shaft forging straightening device as described in claim 1, characterized in that, The hardness value of the extruded gear tooth surface is lower than the hardness value of the gear shaft tooth surface section.

8. The high-speed gear shaft forging straightening device as described in claim 1, characterized in that, The extrusion gear is detachably connected to the connecting block. The extrusion gear comes in various specifications, and the module of the extrusion gear varies with the specifications.

9. The high-speed gear shaft forging straightening device as described in claim 1, characterized in that, The pressure mechanism is a hydraulic mechanism.

10. A method for straightening high-speed gear shaft forgings using the straightening device as described in claim 1, characterized in that, Includes the following steps: The high-speed gear shaft forging is clamped in the clamping mechanism to make the gear shaft axis parallel to the extruded gear axis, ensuring that the gear shaft and the extruded gear have the same module and mesh with each other. The clamping mechanism drives the gear shaft to rotate around its own axis. When the tooth surface of the gear shaft bends and deforms, the squeezed gear slides along the axis of the sliding hole with the undulation of the gear shaft, thereby pushing the slide rod to slide. The greater the deformation, the greater the displacement of the slide rod. The detection unit collects the real-time displacement of the slide bar and transmits it to the controller. The controller analyzes the full circumferential displacement change of the same cross section of the gear shaft, captures the maximum displacement of the slide bar, and then drives the pressure mechanism to move axially through the drive unit to determine the maximum bending deformation of the entire tooth surface section of the gear shaft and the corresponding axial position. The controller controls the pressure mechanism to apply pressure, and the pressure mechanism drives the pressure block to move closer to the gear shaft until the pressure block abuts against the connecting block. The pressure applied by the pressure mechanism is transmitted to the extrusion gear, and the extrusion gear transmits the pressure to the deformed part of the gear shaft tooth surface through the meshing surface, thereby correcting the tooth surface of the gear shaft.

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