A superfinishing tooth face reinforced gear box machining device

Abstract

The utility model discloses a kind of superfinishing gear face reinforced gear box processing devices, including workbench, the top of the workbench is provided with driving clamping assembly, the driving clamping assembly is used to clamp and fix workpiece, adjusting limiting component is provided on the driving clamping assembly, the adjusting limiting component is used to adjust the clamping structure on the driving clamping assembly.The electric push rod in the utility model driving clamping assembly and pressure sensor constitute force control closed loop, workpiece can be monitored in real time by the clamping force of clamping block by pressure sensor, electric push rod can be dynamically adjusted thrust according to processing stage, when superfinishing, clamping force can be reduced to 0.1-0.3MPa, avoid tooth surface pressure injury or thin-walled cylinder deformation, when tooth surface reinforcement, clamping force can be promoted to 0.6-1.0MPa, prevent workpiece deviation, so that the same set of fixture can seamlessly adapt two kinds of technology.

Description

Technical Field

[0001] This utility model relates to the field of gear processing technology, specifically to a gearbox processing device for ultra-precision machining of tooth surfaces. Background Technology

[0002] In the field of gearbox manufacturing, the machining accuracy of key components such as gears and thin-walled cylinders directly determines the transmission efficiency, noise level and service life of the gearbox. Ultra-precision machining requires controlling the tooth surface roughness to Ra≤0.25μm and the tooth profile tolerance to ≤0.008mm. Tooth surface strengthening requires ensuring that the surface hardened layer depth is 0.05-0.2mm and there are no local pressure marks. Reliable clamping fixtures are the core prerequisite for achieving the above accuracy requirements.

[0003] According to application number CN202021881309.3, a processing device for thin-walled cylinders in gearboxes is disclosed, which solves the shortcomings of existing technologies such as high labor consumption and low work efficiency. The device includes a base and a cutting tool. A sliding seat is slidably arranged on the top of the base. A support plate and a base are connected to the top of the sliding seat in sequence by hexagonal screws. A bracket is fixed to one side of the support plate by countersunk bolts. A pressure rod is slidably arranged on the bracket. A pressure plate is welded to the bottom of the pressure rod. A rotating rod is movably connected to the support plate by a pin.

[0004] The fixtures in the above cases can only match workpieces of a single specification and can only fix thin-walled cylinders of a specific size. When machining gears or cylinders with a diameter difference of more than 10mm, the entire fixture body needs to be disassembled and replaced. Moreover, the clamping force of the fixture is mostly a fixed value and cannot be dynamically adjusted according to the process stage. If low-pressure clamping is used, the workpiece is prone to displacement during the strengthening stage, resulting in uneven tooth surface strengthening. If high-pressure clamping is used, tooth surface damage or excessive cylinder ovality is likely to occur during the ultra-precision machining stage. It is difficult to meet the needs of both processes. Therefore, we provide an ultra-precision gearbox tooth surface strengthening processing device. Utility Model Content

[0005] The purpose of this invention is to provide a gearbox machining device for ultra-precision machining of tooth surfaces to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a gearbox machining device for ultra-precision machining of tooth surfaces, comprising a worktable, a drive clamping assembly being provided on the top of the worktable, the drive clamping assembly being used to clamp and fix the workpiece, and an adjustment limit assembly being provided on the drive clamping assembly, the adjustment limit assembly being used to adjust the clamping structure on the drive clamping assembly.

[0007] Optionally, the drive clamping assembly includes two connecting plates, which are respectively installed on the left and right sides of the top of the worktable. An electric push rod is installed on the side of the two connecting plates that is far apart from each other. The output end of the electric push rod passes through the connecting plate and extends to its outside. A pressure sensor is installed on the output end of the electric push rod.

[0008] Optionally, a movable housing is installed on the side of the pressure sensor away from the electric push rod. The top and bottom of the inner wall of the movable housing are rotatably connected by a rotating shaft. Two clamping blocks are rotatably connected to the surface of the rotating shaft. The side of the clamping blocks away from the connecting plate passes through the movable housing and extends to its outside. A rubber block is installed on the clamping block.

[0009] Optionally, the adjusting limit assembly includes four arc-shaped blocks, which are mounted on the clamping block and located inside the movable housing. A threaded rod is mounted on the top of each arc-shaped block, and the top end of the threaded rod penetrates the movable housing and extends to its exterior.

[0010] Optionally, a locking nut is threaded onto the surface of the threaded rod, and a fixing washer is fitted onto the surface of the threaded rod and at the bottom of the locking nut.

[0011] Optionally, the top of the workbench is provided with a collection shell, and slots are provided on the left and right sides of the bottom of the collection shell. A plug is installed on the top of the workbench at the position corresponding to the slot. The top of the plug penetrates the slot and extends into it to contact the inner wall of the slot.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The electric push rod and pressure sensor in the drive clamping assembly of this utility model form a force control closed loop. The pressure sensor can monitor the clamping force of the clamping block on the workpiece in real time. The electric push rod can dynamically adjust the thrust according to the processing stage. During ultra-precision machining, the clamping force can be reduced to 0.1-0.3MPa to avoid tooth surface damage or deformation of thin-walled cylinders. During tooth surface strengthening, the clamping force can be increased to 0.6-1.0MPa to prevent workpiece displacement, so that the same set of fixtures can be seamlessly adapted to two processes.

[0014] 2. The adjustable limit assembly of this utility model can be flexibly adapted to gears or thin-walled cylinders of different diameters. By adjusting the clamping distance and opening angle of the two clamping blocks, it can adapt to the outer circle contour of different workpieces. After adjustment, the position is locked by locking nuts and fixing washers to ensure clamping stability and improve the flexibility and applicability during use. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2This is a three-dimensional structural cross-sectional view of the present invention;

[0017] Figure 3 This is a three-dimensional structural diagram of the drive clamping assembly and the adjustment limiting assembly of this utility model;

[0018] Figure 4 This is a three-dimensional cross-sectional view of the drive clamping assembly and the adjustment limiting assembly of this utility model;

[0019] Figure 5 This is a three-dimensional structural diagram of the clamping block and threaded rod of this utility model.

[0020] In the diagram: 1. Workbench; 2. Drive clamping assembly; 21. Connecting plate; 22. Electric push rod; 23. Pressure sensor; 24. Moving shell; 25. Rotating shaft; 26. Clamping block; 27. Rubber block; 3. Adjustment limit assembly; 31. Arc block; 32. Threaded rod; 33. Locking nut; 34. Fixing washer; 4. Collection shell; 5. Slot; 6. Insertion block; 7. Fixing block; 8. Guide rod; 9. Guide cylinder. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 A gearbox machining device for ultra-precision machining and tooth surface strengthening includes a worktable 1. A controller is mounted on the front of the worktable 1. The controller integrates the control of the thrust output of the electric push rod 22 and the data feedback of the pressure sensor 23 to realize an automated closed loop for real-time monitoring and dynamic adjustment of the clamping force. The clamping force parameters for ultra-precision machining and tooth surface strengthening, such as 0.1-0.3MPa and 0.6-1.0MPa, can be preset without manual adjustment. A collection shell 4 is provided on the top of the worktable 1. The bottom of the collection shell 4 is in contact with the top of the worktable 1. The collection shell 4 collects the grinding wheel generated during ultra-precision machining. The debris and residual shot from the tooth surface strengthening process are collected in a collection shell 4. Slots 5 are provided on both the left and right sides of the bottom. A plug 6 is installed on the top of the worktable 1 at the position corresponding to the slot 5. The top of the plug 6 penetrates the slot 5 and extends into it, contacting the inner wall of the slot 5. The quick-release structure of the slot 5 and the plug 6 enables the quick assembly and disassembly of the collection shell 4, ensuring the stability of the collection shell 4 on the worktable 1. Pulling the collection shell 4 upwards separates the slot 5 from the plug 6, thus completing the disassembly. Ultra-precision machining is the fine grinding of the tooth surface by a diamond grinding wheel, and tooth surface strengthening is the gear shot peening strengthening process.

[0023] A drive clamping assembly 2 is installed on the top of the worktable 1. The drive clamping assembly 2 includes two connecting plates 21, which are respectively installed on the left and right sides of the top of the worktable 1. The connecting plates 21 are fixedly connected to the worktable 1 by welding. The symmetrical layout of the connecting plates 21 ensures the balance of clamping forces on both sides and avoids workpiece displacement due to uneven force. Electric push rods 22 are installed on the side of the two connecting plates 21 that are far apart from each other. The electric push rods 22 provide the power source for clamping. Through the extension and retraction of the output end, they drive the moving shell 24 to move closer to and away from the workpiece, realizing the clamping and release of the workpiece. This can be controlled by... The device adjusts the extension speed and thrust to adapt to the clamping requirements of different workpieces. The output end of the electric push rod 22 passes through the connecting plate 21 and extends to its exterior. A pressure sensor 23 is installed on the output end of the electric push rod 22. The pressure sensor 23 monitors the actual clamping force of the clamping block 26 on the workpiece in real time and feeds the data back to the controller. A movable shell 24 is installed on the side of the pressure sensor 23 away from the electric push rod 22. The movable shell 24 provides a through-mount channel for the clamping block 26, restricts the radial displacement of the clamping block 26, and ensures the stability of the clamping direction. The top and bottom of the inner wall of the movable shell 24 are rotatably connected by a rotating shaft 25. Two clamping blocks 26 are rotatably connected to the surface of the rotating shaft 25. The clamping blocks 26 are clamping actuators that directly contact the workpiece. The workpiece is clamped by the relative movement of the two clamping blocks 26. With the help of the adjusting limit component 3, the opening and closing angle and clamping distance can be changed to adapt to gears or thin-walled cylinders of different diameters. The side of the clamping block 26 away from the connecting plate 21 penetrates through the movable shell 24 and extends to its outside. The top and bottom of the clamping block 26 slide in contact with the inner wall of the movable shell 24, respectively. Rubber blocks 27 are installed on the clamping blocks 26 to achieve flexible clamping and avoid damage to the gear surface caused by the clamping blocks 26 directly contacting the workpiece. The surface of the cylinder is scratched to increase the friction coefficient between the clamping block 26 and the workpiece. The rubber block 27 is fixedly connected to the clamping block 26 by adhesive. The rubber block 27 is made of nitrile rubber. A fixing block 7 is installed at the bottom of the movable shell 24. A guide rod 8 is installed on the side of the fixing block 7 near the connecting plate 21. A guide cylinder 9 is installed on the connecting plate 21 at the position corresponding to the guide rod 8. The end of the guide rod 8 near the guide cylinder 9 passes through the connecting plate 21 and the guide cylinder 9 in sequence and extends to the outside of the guide cylinder 9. By setting the fixing block 7, the guide rod 8 and the guide cylinder 9, the stability of the movable shell 24 when moving laterally is improved.

[0024] The drive clamping assembly 2 is equipped with an adjustment limit assembly 3, which includes four arc-shaped blocks 31. The arc-shaped blocks 31 are mounted on the clamping blocks 26 and located inside the movable housing 24. The top and bottom of the arc-shaped blocks 31 slide in contact with the inner wall of the movable housing 24, respectively. The arc-shaped blocks 31 serve as the adjustment medium for the clamping blocks 26. By sliding the arc-shaped blocks 31 along the inner side of the clamping blocks 26, the opening angle and relative distance between the two clamping blocks 26 are changed. A threaded rod 32 is installed on the top of the arc-shaped blocks 31. The threaded drive has self-locking properties, fixing the position of the arc-shaped blocks 31 and preventing loosening after adjustment. The top of the threaded rod 32 penetrates the movable housing 24 and extends to its outside. A locking nut 33 is threadedly connected to the surface of the threaded rod 32. The locking nut 33 enables adjustment. Locking: After the spacing and angle of the clamping blocks 26 are adjusted to the correct position, tighten the locking nut 33 to fix the threaded rod 32 onto the movable housing 24. This prevents the threaded rod 32 from loosening due to processing vibration, limits the axial displacement of the threaded rod 32, and ensures that the clamping blocks 26 maintain a stable clamping state during processing. A fixing washer 34 is fitted on the surface of the threaded rod 32 and at the bottom of the locking nut 33. The top and bottom of the fixing washer 34 are in close contact with the movable housing 24 and the locking nut 33, respectively. The fixing washer 34 increases the contact area between the locking nut 33 and the movable housing 24, preventing the locking nut 33 from directly damaging the surface of the movable housing 24. The fixing washer 34 is made of spring steel and has a certain elasticity, which can offset the slight loosening caused by processing vibration.

[0025] Adjust the angle between the two clamping blocks 26 according to the size of the workpiece. Loosen the locking nut 33 on the threaded rod 32 counterclockwise with a wrench to release the limit on the threaded rod 32. If the diameter of the workpiece is larger than the current clamping distance, widen the angle between the two clamping blocks 26. If the diameter of the workpiece is smaller, narrow the distance between the two clamping blocks 26 so that the threaded rod 32 can move within the arc-shaped opening at the top of the movable housing 24. After adjusting to the appropriate position, fix the position of the threaded rod 32 with the locking nut 33.

[0026] In use, place the workpiece horizontally between the two clamping blocks 26, ensuring that the workpiece axis is approximately coaxial with the axis of rotation 25. Click on the ultra-precision machining button on the controller, and the electric push rods 22 on both sides extend synchronously, driving the moving shell 24 and the clamping blocks 26 to move closer to the workpiece. When the rubber block 27 on the clamping block 26 contacts the workpiece, the pressure sensor 23 provides real-time feedback of clamping force data, which is transmitted to the controller. When the force reaches the preset ultra-precision machining clamping force, such as 0.2MPa, the controller automatically stops the extension of the electric push rods 22, and then the workpiece is finely ground by an external diamond grinding wheel.

[0027] After the ultra-precision machining is completed, there is no need to loosen the workpiece. Click the strengthening mode on the controller, and the electric push rod 22 will slowly extend again. The pressure sensor 23 will provide real-time feedback of the force value until the preset strengthening clamping force, such as 0.8MPa, is reached. Then, the external shot peening head can be aimed at the tooth surface of the workpiece for blasting.

[0028] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gearbox machining device for ultra-precision tooth surface strengthening, characterized in that: Includes a worktable (1), the top of which is provided with a drive clamping assembly (2), the drive clamping assembly (2) is used to clamp and fix the workpiece, and the drive clamping assembly (2) is provided with an adjustment limit assembly (3), the adjustment limit assembly (3) is used to adjust the clamping structure on the drive clamping assembly (2).

2. The ultra-precision gearbox machining device according to claim 1, characterized in that: The drive clamping assembly (2) includes a connecting plate (21). There are two connecting plates (21) installed on the left and right sides of the top of the workbench (1). Electric push rods (22) are installed on the side of the two connecting plates (21) that are far apart from each other. The output end of the electric push rod (22) passes through the connecting plate (21) and extends to its outside. A pressure sensor (23) is installed on the output end of the electric push rod (22).

3. The ultra-precision gearbox machining device according to claim 2, characterized in that: The pressure sensor (23) is mounted on a movable housing (24) on the side away from the electric push rod (22). The top and bottom of the inner wall of the movable housing (24) are fixedly connected by a rotating shaft (25). Two clamping blocks (26) are rotatably connected to the surface of the rotating shaft (25). The clamping blocks (26) on the side away from the connecting plate (21) penetrate the movable housing (24) and extend to its outside. A rubber block (27) is mounted on the clamping block (26).

4. The ultra-precision gearbox machining device according to claim 3, characterized in that: The adjustment limit assembly (3) includes four arc-shaped blocks (31), which are mounted on the clamping block (26) and located inside the movable shell (24). A threaded rod (32) is mounted on the top of the arc-shaped block (31), and the top end of the threaded rod (32) passes through the movable shell (24) and extends to its outside.

5. The ultra-precision gearbox machining device according to claim 4, characterized in that: The threaded rod (32) is threaded with a locking nut (33), and a fixing washer (34) is fitted on the surface of the threaded rod (32) and at the bottom of the locking nut (33).

6. The ultra-precision gearbox machining device according to claim 1, characterized in that: The top of the workbench (1) is provided with a collection shell (4), and slots (5) are provided on the left and right sides of the bottom of the collection shell (4). A plug (6) is installed on the top of the workbench (1) and at the position corresponding to the slot (5). The top of the plug (6) passes through the slot (5) and extends into its interior to contact the inner wall of the slot (5).

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