Positioning and correcting guide tool for forming bevel gear

Abstract

The utility model relates to powder metallurgy technical field discloses helical gear forming positioning correction guiding frock, including work table and fixedly connected hydraulic press of work table on, and the connecting column is connected between work table and hydraulic press, and the connecting column is hydraulic column, and the installation platform, telescopic column and the compression plate provide sliding guide, and the hydraulic press drive hydraulic column drives the installation platform and the mould and carries out the compression, and the hydraulic press drive telescopic column drives the compression plate to go up and down, and the compression plate rear side is equipped with the feeding structure that comprises the hopper and the sliding block, and the work table right side is equipped with the integrated controller and the sound source locator. The utility model discloses through sound source locator realizes the compression process defect monitoring, utilizes the detection head to carry out the secondary detection after demolding, and realizes the defect automatic backfill correction with hydraulic press drive, solves the problem that the prior art cannot monitor and correct the defect in real time, improves the finished product qualification rate.

Description

Technical Field

[0001] This utility model relates to the fields of powder metallurgy and gear manufacturing technology, and in particular to a helical gear forming positioning correction guide tool. Background Technology

[0002] As a key transmission component, helical gears are widely used in automobiles, machinery and precision instruments. Currently, powder metallurgy forming technology has become one of the main processes for manufacturing helical gears due to its advantages of high efficiency and high material utilization. However, the powder pressing process is a complex physical and mechanical process. Due to factors such as uneven powder distribution, changes in mold friction and unstable pressing force transmission, structural defects such as uneven density and microcracks will be generated inside the gear.

[0003] Traditional powder metallurgy helical gear forming equipment lacks effective real-time monitoring methods during the pressing process, making it impossible to dynamically control the quality of the gear structure forming inside the mold. The equipment's inspection process is often set after demolding. If a defect is found at this time, the gear is judged as scrap and can only be scrapped and reworked. This not only wastes raw materials but also significantly reduces the overall production efficiency and product qualification rate. Especially for helical gears that require high precision, any slight deviation in production will affect the final transmission performance.

[0004] Therefore, there is an urgent need in the existing technology for an automated device that can integrate molding, defect location, and real-time correction to overcome the problems of existing helical gear molding equipment being unable to monitor internal defects in real time and difficult to correct them in time during the pressing process, resulting in low finished product qualification rate and fragmented demolding and inspection processes.

[0005] Therefore, this utility model proposes a helical gear forming positioning correction guide tool to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems of existing helical gear forming positioning and correction guide fixtures, such as the inability to monitor internal defects in real time during the pressing process, the difficulty in timely correction, and the dispersion of demolding and inspection processes, this utility model aims to provide a helical gear forming positioning and correction guide fixture with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a helical gear forming positioning correction guide fixture, including: a worktable, a hydraulic press, a connecting column, a hydraulic column, a mounting platform, a mold, a ring rail, a detection head, a telescopic column, a pressure-resistant plate, a powder tank, a mounting plate, a guide rail, a slider, a funnel, an integrated controller, a sound source locator, and a push column.

[0008] The workbench is provided with four connecting columns that are fixedly connected to the bottom of the hydraulic press. The connecting columns pass through the mounting platform and the pressure plate, providing sliding guide support for the lifting and lowering movement of the hydraulic column, the mounting platform, the telescopic column and the pressure plate.

[0009] The hydraulic press has a sliding connection to the hydraulic column inside, and the bottom of the hydraulic column is fixedly connected to the mounting platform. The inner perimeter of the mounting platform fits around the outer wall of the connecting column, and the bottom of the mounting platform is fixedly connected to the mold.

[0010] The bottom of the mounting platform is also fixedly connected to the ring rail, and the detection head is slidably connected to the outer wall of the ring rail. The detection head is used to scan for defects in the formed helical gear.

[0011] The telescopic columns are slidably connected to the bottom of the left and right sides of the hydraulic press. The bottom of the two telescopic columns is fixedly connected to the pressure-resistant plate. The inner perimeter of the pressure-resistant plate is fitted to the outer wall of the connecting column. The powder trough is opened inside the pressure-resistant plate to hold the powder to be pressed.

[0012] The mounting plate is fixedly connected to the rear side of the pressure-resistant plate, and the guide rail is fixedly connected to the top left and right sides of the mounting plate. The slider is slidably connected to the outer wall of the guide rail, and the funnel is fixedly connected to the front side of the slider. The funnel is used to load powder, and the outlet of the funnel can be moved to directly above the powder trough to achieve precise filling of powder.

[0013] The integrated controller is installed on the right side of the workbench, and the sound source locator is installed on the left side of the integrated controller. The sound source locator is used to collect sound wave signals in real time during the pressing process.

[0014] The push column is fixedly connected to the top of the worktable. The push column is located below the powder tank in the vertical direction and is used to push the helical gear upward during demolding.

[0015] Preferably, the bottom height of the sound source locator is consistent with the top height of the anti-pressure plate in its unlowered state, and the position setting can ensure that the sound source locator receives the pressure sound wave signal from the powder tank at the optimal angle.

[0016] Preferably, the detection head is electrically connected to the integrated controller, and the detection head transmits the defect information obtained by scanning to the integrated controller in real time to guide the subsequent correction process.

[0017] Preferably, the integrated controller is electrically connected to the sound source locator. The integrated controller integrates sound source focusing and localization technology and defect coupling feature extraction technology to analyze, locate and identify internal defects in the acquired sound wave signals. At the same time, the integrated controller can activate real-time compensation control technology to dynamically adjust the working parameters of the hydraulic press and the telescopic column.

[0018] Preferably, the bottom of the mold is equipped with a friction plate design to reduce the demolding friction coefficient. The friction plate design can effectively reduce the adhesion force between the mold and the forming helical gear, so as to ensure product accuracy and demolding success rate.

[0019] Preferably, the integrated controller is equipped with a display and buttons on the front side. The display is used to show the operating parameters of the equipment and the defect detection results, and the buttons are used by the operator to input control commands and perform emergency stop operations.

[0020] Preferably, a baffle is fixedly connected to the top rear side of the mounting plate. The baffle is located behind the moving path of the funnel and is used to protect the powder and the operating area during the feeding process.

[0021] Preferably, the bottom of the funnel is provided with a discharge port, the slider is slidably engaged with the guide rail, and the slider drives the funnel to perform horizontal reciprocating motion on the guide rail, so as to realize the precise feeding of the powder trough by the discharge port of the funnel.

[0022] This utility model has the following beneficial effects:

[0023] 1. This utility model, by setting up a sound source locator and an integrated controller, uses sound source focusing and positioning technology to collect the pressing sound wave signal in real time and perform frequency domain and entropy value analysis. This solves the problem that existing equipment cannot monitor internal defects in real time during the pressing process and is difficult to correct in time. It achieves the effects of accurately locking the defect location, adjusting parameters in real time and performing secondary pressing correction through feedback control of hydraulic and telescopic components, and significantly improving the finished product qualification rate and defect identification accuracy.

[0024] 2. This utility model solves the problem of low molding accuracy caused by lateral displacement and shaking of various moving parts during the pressing process by setting a connecting column that passes through the mounting platform and the pressure plate between the workbench and the hydraulic press. It achieves the effect of providing precise vertical guidance and support for the hydraulic column, mounting platform and pressure plate, ensuring strict alignment between the mold and the powder tank center, and effectively improving the geometric accuracy of helical gear molding.

[0025] 3. This utility model solves the problems of separation of inspection process after demolding and inability to repair defects online by setting a ring rail at the bottom of the mounting platform in conjunction with the detection head and the lifting and resetting mechanism of the anti-pressure plate driven by the telescopic column. It achieves the effect of all-round appearance scanning immediately after the helical gear is ejected, automatic backfilling and heavy pressure correction once defects are found, and realizing the effect of integrated closed-loop control of molding, inspection and correction. Attached Figure Description

[0026] Figure 1 This is a perspective view of the helical gear forming positioning correction guide tool proposed in this utility model;

[0027] Figure 2 This is a front view of the helical gear forming positioning correction guide tool proposed in this utility model;

[0028] Figure 3 This is a cross-sectional view of the hydraulic structure in the helical gear forming positioning correction guide tooling proposed in this utility model;

[0029] Figure 4 This is a cross-sectional view of the conveying structure in the helical gear forming positioning correction guide tooling proposed in this utility model;

[0030] Figure 5 This is an exploded view of the conveying structure in the helical gear forming positioning correction guide tooling proposed in this utility model.

[0031] Legend:

[0032] 1. Workbench; 2. Hydraulic press; 3. Connecting column; 4. Hydraulic column; 5. Mounting platform; 6. Mold; 7. Ring rail; 8. Detection head; 9. Telescopic column; 10. Pressure plate; 11. Powder tank; 12. Mounting plate; 13. Baffle; 14. Guide rail; 15. Slider; 16. Funnel; 17. Integrated controller; 18. Display; 19. Button; 20. Sound source locator; 21. Push column. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0034] Example:

[0035] Please refer to Figures 1 to 5This utility model provides a helical gear forming positioning and correction guide fixture, which aims to solve the problems of low finished product qualification rate and fragmented demolding and inspection processes caused by the lack of real-time internal defect monitoring and automatic correction capabilities in existing helical gear forming equipment during the pressing process. Figures 1 to 3 As shown, the main structure of the helical gear forming positioning correction guide fixture includes a worktable 1 and a hydraulic press 2 fixedly connected above the worktable 1. The worktable 1 serves as the mounting base for the entire device, providing stable support for the entire equipment. The hydraulic press 2, as the main power output source, is located directly above the worktable 1. Four connecting columns 3 are fixedly connected to the top perimeter of the worktable 1 and the bottom perimeter of the hydraulic press 2. The four connecting columns 3 are arranged vertically in a rectangular pattern to form a rigid support structure for the overall frame. The connecting columns 3 penetrate the mounting platform 5 and the pressure plate 10, providing precise vertical sliding guide support for the hydraulic column 4, mounting platform 5, telescopic column 9, and pressure plate 10, preventing the moving parts from shifting or shaking during lifting. The hydraulic press 2 has a hydraulic column 4 slidably connected inside. Driven by the hydraulic press 2, the hydraulic column 4 can reciprocate vertically. A mounting platform 5 is fixedly connected to the bottom of the 4. The mounting platform 5 serves as the mounting carrier for the upper mold 6. The inner perimeter of the mounting platform 5 fits around the outer wall of the connecting column 3. The connecting column 3 restricts the horizontal displacement of the mounting platform 5 and guides the mounting platform 5 to rise and fall smoothly in the vertical direction. A mold 6 is fixedly connected to the center of the bottom of the mounting platform 5. The mold 6 is used to press the powder into the powder tank 11 below under hydraulic drive to form the powder. The bottom of the mold 6 is designed with friction plates to reduce the demolding friction coefficient and ensure that the helical gear can be smoothly released from the mold 6 after molding. At the same time, a ring rail 7 is also fixedly connected to the bottom of the mounting platform 5. The ring rail 7 is arranged around the periphery of the mold 6. A detection head 8 is slidably connected to the outer wall of the ring rail 7. The detection head 8 can move in a circle along the ring rail 7. The detection head 8 is electrically connected to the integrated controller 17 and is used to perform 360-degree appearance defect detection after the helical gear is demolded.

[0036] To solve the aforementioned technical problems, the core of the technical solution in this embodiment lies in the fact that the helical gear forming positioning correction guide fixture also includes a lower pressure-bearing and feeding structure for carrying powder and achieving demolding. Furthermore, the lower pressure-bearing and feeding structure forms a specific structural fit and connection relationship with the aforementioned hydraulic press 2 and worktable 1 through the connecting column 3. Please refer to [the relevant documentation / reference]. Figure 1 , Figure 2 and Figure 4As shown, the lower pressure-bearing and feeding structure is described in detail below. Telescopic columns 9 are slidably connected to the bottom left and right sides of the hydraulic press 2. Under the control of the hydraulic press 2, the telescopic columns 9 can extend and retract vertically. The telescopic columns 9 serve as the main driving component of the lower pressure-bearing structure. A pressure-resistant plate 10 is fixedly connected to the bottom of both telescopic columns 9. The pressure-resistant plate 10 serves as the main load-bearing and stress-bearing component during powder pressing. The inner perimeter of the pressure-resistant plate 10 fits around the outer wall of the connecting column 3, guiding the pressure-resistant plate 10 to rise and fall smoothly in the vertical direction. A powder trough 11 for accommodating powder is opened in the center of the pressure-resistant plate 10. The top of the powder trough 11 is aligned with the pressing area of ​​the mold 6. An mounting plate 12 is fixedly connected to the rear side of the pressure-resistant plate 10. The mounting plate 12 serves as the mounting carrier for the feeding mechanism and rises and falls synchronously with the pressure-resistant plate 10. Guide rails 14 are fixedly connected to the top left and right sides of the mounting plate 12. The guide rails 14 extend horizontally and are designed to... The guide rail 14 is slidably connected to a slider 15 on its outer wall. The slider 15 can reciprocate horizontally on the guide rail 14. A funnel 16 is fixedly connected to the front side of the slider 15. The funnel 16 is used to load powder. The bottom of the funnel 16 has a discharge port. The slider 15 is slidably engaged with the guide rail 14, so that the discharge port of the funnel 16 can be moved to the top of the powder tank 11 to achieve precise filling of powder. A baffle 13 is fixedly connected to the rear side of the top of the mounting plate 12. The baffle 13 is set behind the funnel 16 to provide protection for powder and operating area during feeding. A push column 21 is fixedly connected to the top center of the workbench 1. The push column 21 is located below the pressure plate 10. The push column 21 is located below the powder tank 11 in the vertical direction and is aligned with the axis of the powder tank 11. The push column 21 is used to push the pressed helical gear upward from the powder tank 11 when the pressure plate 10 descends to achieve demolding.

[0037] Based on the above embodiments, in order to realize intelligent human-machine interaction and real-time monitoring of equipment operation status, an integrated controller 17 is installed on the right side of the workbench 1. A display 18 and a button 19 are installed on the front side of the integrated controller 17. The display 18 is used to display pressing parameters, defect location information, and equipment operation status in real time. The button 19 is used by the operator to input control commands and perform emergency stop operations. The integrated controller 17 establishes electrical connections with the hydraulic press 2, telescopic column 9, detection head 8, and sound source locator 20 to realize centralized data processing and command issuance. In order to ensure the accuracy of sound wave signal acquisition and avoid structural obstruction causing signal attenuation, the bottom height of the sound source locator 20 is consistent with the top height of the anti-pressure plate 10 in the unlowered state. The height position relationship allows the sound source locator 20 to receive the pressing sound wave signal from the powder tank 11 at the optimal angle. The sound source locator 20 and the integrated controller 17 are connected to the hydraulic press 2, telescopic column 9, detection head 8, and sound source locator 20. The integrated controller 17 is electrically connected to transmit the collected analog sound wave signal to the integrated controller 17 for subsequent feature extraction and analysis. In order to improve the surface quality of the helical gear after molding and reduce the demolding difficulty, the bottom of the mold 6 is equipped with a friction plate design to reduce the demolding friction coefficient. The friction plate design can effectively reduce the adhesion between the mold 6 and the metal powder, and prevent the gear surface from being scratched and chipped due to excessive friction at the moment of demolding. For protection and guiding stability during the feeding process, a baffle 13 is fixedly connected to the top rear side of the mounting plate 12. The baffle 13 is located behind the moving path of the funnel 16. The baffle 13 is used to prevent the funnel 16 from slipping and dust from splashing backward during the retraction process. The slider 15 is slidably engaged with the guide rail 14. The fit accuracy between the slider 15 and the guide rail 14 ensures the stability of the funnel 16 during the movement process, so that the discharge port of the funnel 16 can be moved to the top of the powder tank 11 for precise feeding.

[0038] Working principle: When the equipment is first used, the operator first sets the working parameters through the button 19 on the front of the integrated controller 17, and loads the dust raw material used to make helical gears into the inside of the funnel 16. The front of the slider 15 is fixedly connected to the funnel 16, and the slider 15 slides against the outer wall of the guide rail 14. The guide rail 14 is fixedly connected to the anti-pressure plate 10 through the mounting plate 12. Therefore, the slider 15 can drive the funnel 16 to reciprocate in the back and forth direction on the guide rail 14. The slider 15 is driven to slide forward, which drives the discharge port at the bottom of the funnel 16 to move. The powder material falls naturally under gravity and fills the internal space of the powder trough 11 at the position directly above the inside of the pressure plate 10. The baffle 13 is fixedly connected to the top rear side of the mounting plate 12. The baffle 13 plays a blocking and protective role in this process to prevent dust from splashing to the rear of the equipment. The slider 15 and the funnel 16 move synchronously with the lifting and lowering action of the pressure plate 10 to complete the precise conveying and filling of dust. After the filling process is completed, the slider 15 drives the funnel 16 to slide back and reset along the guide rail 14, waiting for the next filling command.

[0039] After the filling process is completed, the hydraulic press 2 starts working. The hydraulic press 2 controls the internally sliding hydraulic column 4 to move downward. The hydraulic column 4 drives the mounting platform 5, which is fixedly connected at the bottom, to slide vertically downward along the outer wall of the connecting column 3. During this process, the connecting column 3 provides stable guiding support for the mounting platform 5 to prevent the mounting platform 5 from deflecting. The mold 6 at the bottom of the mounting platform 5 is then aligned and pressed into the powder trough 11 inside the pressure plate 10, forcibly pressing the dust in the powder trough 11 into the shape of a helical gear. During the pressing process of the mold 6 pressing into the powder trough 11, the sound source locator 20 located on the left side of the integrated controller 17 starts working. The bottom height of the sound source locator 20 is consistent with the top height of the pressure plate 10 in the un-lowered state. The position setting ensures the directness and accuracy of sound wave acquisition. The sound source locator 20 acquires the sound wave signal generated during the pressing process in real time and transmits the acquired sound wave signal to The integrated controller 17 internally runs a sound source focusing and localization technology algorithm. The integrated controller 17 performs frequency domain conversion processing and coupling analysis on the received signal and calculates the confidence distribution entropy. The integrated controller 17 determines the defect focusing domain by combining the structural parameters of the helical gear with the back propagation path, thereby improving the defect localization accuracy. The integrated controller 17 has a built-in defect feature library. Combined with historical sound wave data, it performs mutual information analysis of the feature distribution entropy and confidence distribution entropy of the signal through defect coupling feature extraction technology, thereby filtering out time-domain defect signals. When the integrated controller 17 identifies a defect, it starts real-time compensation control technology to control the hydraulic press 2 and the telescopic column 9 to fine-tune the working parameters, which significantly improves the defect correction efficiency. At the same time, the bottom of the mold 6 is designed with friction plates to reduce the demolding friction coefficient, ensuring product accuracy and demolding success rate.

[0040] After pressing and real-time correction are completed, the demolding stage begins. The hydraulic press 2 controls the telescopic columns 9 on the left and right sides to slide down. The telescopic columns 9 drive the anti-pressure plate 10, which is fixedly connected to the bottom, to slide down along the outer wall of the connecting column 3. The connecting column 3 again acts as a guide. Since the position of the push column 21 at the top of the workbench 1 is fixed, as the anti-pressure plate 10 descends, the push column 21 passes through the bottom of the anti-pressure plate 10 and enters the powder tank 11, pushing the helical gear pressed and formed in the powder tank 11 upward and detaching it from the powder tank 11. Then, the ring rail 7 fixedly connected to the bottom of the mounting table 5 comes into play. The detection head 8, which is slidably connected to the outer wall of the ring rail 7, slides along the ring rail 7. The detection head 8 performs an all-round scan around the ejected helical gear to detect appearance defects. The detection head 8 transmits the detected defect location information to the defect feature library of the integrated controller 17. The display 18 displays the detection results in real time.

[0041] If the inspection head 8 detects a defect in the helical gear, the integrated controller 17 sends a control command to the hydraulic press 2. The hydraulic press 2 controls the telescopic column 9 to slide upward. The telescopic column 9 drives the anti-pressure plate 10 and the fixed mounting plate 12 to rise and reset synchronously, so that the defective helical gear is re-inserted into the powder tank 11. Then the hydraulic press 2 drives the hydraulic column 4 to descend again, driving the mold 6 to press into the powder tank 11 again. The above pressing and correction process is repeated until the inspection result is qualified, so that the equipment completes the entire process of helical gear from powder filling, pressing, defect location, correction to demolding.

Claims

1. A helical gear forming positioning correction guide fixture, including a worktable (1) and a hydraulic press (2) fixedly connected above the worktable (1); Its features are, Four connecting columns (3) are fixedly connected to the top perimeter of the workbench (1) and the bottom perimeter of the hydraulic press (2). The connecting columns (3) are sliding guide supports. The hydraulic press (2) has a hydraulic column (4) slidably connected inside. The bottom of the hydraulic column (4) is fixedly connected to a mounting platform (5). The inner periphery of the mounting platform (5) fits the outer wall of the connecting column (3). The bottom of the mounting platform (5) is fixedly connected to a mold (6) and a ring rail (7), and the outer wall of the ring rail (7) is slidably connected to a detection head (8); The bottom of the left and right sides of the hydraulic press (2) is slidably connected with telescopic columns (9), and the bottom of the two telescopic columns (9) is fixedly connected with a pressure plate (10). The inner perimeter of the pressure plate (10) is fitted around the outer wall of the connecting column (3), and a powder trough (11) is opened inside the pressure plate (10). The rear side of the pressure-resistant plate (10) is fixedly connected to the mounting plate (12), the top left and right sides of the mounting plate (12) are fixedly connected to the guide rail (14), the outer wall of the guide rail (14) is slidably connected to the slider (15), and the front side of the slider (15) is fixedly connected to the funnel (16). An integrated controller (17) is installed on the right side of the workbench (1), and a sound source locator (20) is installed on the left side of the integrated controller (17). A push column (21) is fixedly connected to the top of the workbench (1), and the push column (21) is located below the powder tank (11) in the vertical direction.

2. The helical gear forming positioning correction guide fixture according to claim 1, characterized in that, The connecting column (3) passes through the mounting platform (5) and the pressure plate (10).

3. The helical gear forming positioning correction guide fixture according to claim 1, characterized in that, The detection head (8) is electrically connected to the integrated controller (17).

4. The helical gear forming positioning correction guide fixture according to claim 1, characterized in that, The sound source locator (20) is electrically connected to the integrated controller (17), and the bottom height of the sound source locator (20) is consistent with the top height of the pressure plate (10) in the unlowered state.

5. The helical gear forming positioning correction guide fixture according to claim 1, characterized in that, A baffle (13) is fixedly connected to the top rear side of the mounting plate (12).

6. The helical gear forming positioning correction guide fixture according to claim 1, characterized in that, The bottom of the funnel (16) is provided with a discharge port, and the slider (15) is slidably engaged with the guide rail (14), so that the discharge port of the funnel (16) can be moved to the top of the powder tank (11).

7. The helical gear forming positioning correction guide fixture according to claim 1, characterized in that, The bottom of the mold (6) is designed with friction plates to reduce the coefficient of friction during demolding.

8. The helical gear forming positioning correction guide fixture according to claim 1, characterized in that, The integrated controller (17) has a display (18) and buttons (19) mounted on its front side.

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