Flexible flywheel piercing device

Abstract

The utility model discloses a flexible flywheel punching processing device relates to automobile parts processing die technical field. The die includes mould core, positioning subassembly, multiple punch assembly and punch drive arrangement, the middle part of mould core is provided with flexible flywheel positioning station, and positioning subassembly is used for workpiece positioning, and multiple punch assembly is arranged around positioning station and is even along the feed direction front and back staggered in ring shape, and each punch assembly contains punch and punch guide sleeve, punch drive arrangement can drive all punch synchronous side feed, and the stamping forming of all signal hole is completed once, and the automatic falling structure of waste material is arranged to the die core corresponding to the blanking position, and the waste material can be automatically discharged under the action of gravity. The utility model can realize the one -off synchronous stamping processing of flexible flywheel signal hole, and the processing efficiency is greatly improved, and the division cumulative error is eliminated to guarantee the hole position precision.

Description

Technical Field

[0001] This utility model relates to the field of mechanical manufacturing technology, specifically to automotive parts processing mold equipment, and more particularly to a flexible flywheel punching processing device. Background Technology

[0002] A flexible flywheel, also known as a kinetic flywheel, is a core component of the powertrain system in automatic transmission vehicles. It connects the engine crankshaft to the torque converter and performs multiple functions, including power transmission, torsional vibration damping, and engine starting. Flexible flywheels typically have a near-basin-shaped structure, with a ring of evenly distributed signal holes machined into their sidewalls or disc. These signal holes, in conjunction with a speed sensor, are used to acquire real-time crankshaft position and speed signals, forming a crucial foundation for precise ignition and fuel injection control by the engine electronic control unit (ECU).

[0003] Currently, the processing of signal holes in flexible flywheels mainly employs two methods: laser drilling and traditional stamping drilling.

[0004] Laser drilling uses a non-contact processing method and has high forming accuracy, but the equipment purchase cost is high and the processing efficiency per station is low. It is particularly uneconomical in mass production scenarios and is difficult to adapt to the needs of large-scale production.

[0005] Traditional stamping and punching methods have the following technical drawbacks: Most of them adopt a single-punch step-by-step stamping process, which requires processing hole by hole and switching between workstations with an indexing and rotating mechanism. The process involves many steps, long processing time, and low production efficiency, making it difficult to meet the cycle time requirements of large-scale automated production.

[0006] When punching holes in multiple stations in stages, the cumulative error of the indexing mechanism and the repeated positioning error of the worktable make it difficult to guarantee the positional accuracy between signal holes, which ultimately affects the accuracy of speed signal acquisition.

[0007] Burrs and debris are easily generated during the punching process, and the subsequent cleaning process requires extra time, which disrupts the overall processing rhythm and further reduces production efficiency.

[0008] In view of this, we propose a flexible flywheel punching device. Utility Model Content

[0009] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a flexible flywheel punching processing device, which aims to solve the technical problems of low processing efficiency, insufficient hole position accuracy and cumbersome waste cleaning in the existing flexible flywheel signal hole punching processing, and realize efficient, high-precision, low-burr one-time punching forming of signal holes.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: A flexible flywheel punching device includes a die core, a positioning assembly, multiple sets of punch assemblies, and a punch driving device.

[0011] The center of the mold core is provided with a positioning station for holding the flexible flywheel to be processed; the positioning component is installed at the positioning station of the mold core to perform circumferential and radial positioning of the flexible flywheel, ensuring that the workpiece and the punch are aligned.

[0012] Multiple sets of punch assemblies are arranged in a uniform ring around the circumference of the positioning station, with each set of punch assemblies staggered front to back along its own feed axis. The number and arrangement of the punch assemblies match the distribution of the signal holes in the flexible flywheel design. Each set of punch assemblies includes a punch and a punch guide sleeve. The punch is slidably mounted in the guide hole of the punch guide sleeve, and the front end of the punch facing the positioning station has a blanking end adapted to the size of the signal hole to be processed. The punch guide sleeve is used to precisely guide the movement direction of the punch, ensuring the accuracy of the punching position.

[0013] The punch drive device is fixedly installed on the outside of the mold core. The output end of the punch drive device is connected to the tail end of all punches for transmission. It is used to drive all punches to feed synchronously towards the center of the positioning station along the punch guide sleeve, so as to realize the one-time synchronous stamping of all signal holes on the side wall of the flexible flywheel.

[0014] The die core is equipped with an automatic waste discharge structure at the punching position of each punch. The waste generated during punching can be automatically discharged downwards under the action of gravity through the automatic waste discharge structure, without the need for additional cleaning process.

[0015] Furthermore, the positioning component includes at least three positioning pins, all of which are evenly distributed around the circumference of the positioning station. The upper end of each positioning pin protrudes upward from the top surface of the mold core and is used to engage with the reference positioning hole on the flexible flywheel to achieve rapid and accurate positioning of the workpiece.

[0016] Furthermore, the staggered distance between adjacent punch assemblies along the feed direction is 0.5mm~2mm, so that there is a slight time difference when the punching working end of each punch contacts the flexible flywheel sidewall, thus dispersing the overall punching force in time and space, avoiding the concentration of punching force that causes local deformation of the workpiece, and improving the forming quality of the signal hole.

[0017] Furthermore, the punch drive device is a common pneumatic stamping mechanism, which can complete the stamping process without the need for a dedicated high-power stamping equipment. The equipment investment cost is low, which is suitable for the economic requirements of mass production.

[0018] The present invention has the following advantages over the prior art: 1. Significantly improves processing efficiency. By arranging multiple sets of punch assemblies in a ring around the flexible flywheel positioning station and driving the synchronous lateral punching, all signal holes of the flexible flywheel can be processed and formed simultaneously in one go. This eliminates the need for indexing rotation and hole-by-hole processing, significantly shortening the processing time per piece and matching the cycle time requirements of large-scale automated production.

[0019] 2. Ensure the positional accuracy of the signal holes. Multiple sets of punches complete the stamping process simultaneously, fundamentally avoiding the positional deviation between holes caused by the cumulative indexing error and the repeated positioning error of the worktable in traditional step-by-step stamping. This ensures the circumferential positional accuracy between each signal hole and guarantees the accuracy of subsequent speed and position signal acquisition.

[0020] 3. Staggered arrangement reduces hole edge deformation. The punch assembly is arranged in a uniform ring and staggered back and forth along the feed direction, so that the punching force is released in a distributed manner in time and space, avoiding local deformation of the workpiece caused by the instantaneous concentration of punching force, and effectively ensuring the forming quality and edge smoothness of the signal hole.

[0021] 4. Automatic waste discharge, saving cleaning costs. Utilizing a side-punching method combined with an automatic waste discharge structure, the waste chips naturally fall and are discharged under gravity after punching, eliminating the need for additional cleaning mechanisms or manual cleaning procedures. This simplifies the processing flow and reduces equipment and labor costs.

[0022] 5. Low equipment cost and wide applicability. The entire mold can be driven by a common pneumatic punch press, without the need for special high-power stamping equipment. The equipment investment is small, which is suitable for the economic requirements of mass production of flexible flywheels. At the same time, the number and diameter of the punches can be adjusted to accommodate the processing of flexible flywheels of different specifications. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a frontal cross-sectional view of the present invention. Figure 3 This is a schematic diagram of the punch guide sleeve in this utility model; Figure 4 This is a schematic diagram of the distribution structure of the punch assembly of this utility model; Figure 5 This is a cross-sectional schematic diagram of the automatic waste falling structure of this utility model; Figure 6 This is a schematic diagram of the positioning component of this utility model; Figure 7 This is a schematic diagram of the connection structure of the punch drive device of this utility model; Figure 8 This is an enlarged view of the material feeding channel in this utility model; Figure 9 This is a schematic diagram of the waste outlet structure of this utility model.

[0024] The meanings of the labels in the diagram are as follows: 1. Mold core; 2. Positioning station; 3. Positioning component; 31. Positioning pin; 4. Punch assembly; 41. Punch; 411. Punching working end; 42. Punch guide sleeve; 5. Punch drive device; 6. Automatic waste dropping structure; 61. Waste discharge channel; 62. Waste outlet; 7. Flexible flywheel. Detailed Implementation

[0025] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Example

[0026] like Figures 1 to 9 As shown, this embodiment provides a flexible flywheel punching processing device, including a die core 1, a positioning assembly 3, multiple punch assemblies 4, and a punch driving device 5. The die core 1 is integrally formed from high-strength mold steel, possessing good structural rigidity and wear resistance, and can withstand the load impact of continuous stamping operations.

[0027] A recessed positioning station 2 is provided in the middle of the mold core 1. The contour of the positioning station 2 is adapted to the bottom shape of the flexible flywheel 7 to be processed, and is used to support the flexible flywheel 7 to be processed, restricting the radial movement of the workpiece. The positioning component 3 is installed at the positioning station 2 of the mold core 1, and is used to perform dual positioning of the flexible flywheel 7 in both circumferential and radial directions, ensuring that the workpiece and the punch 41 are accurately aligned and avoiding positional deviation during the stamping process. Specifically, the positioning component 3 includes at least three positioning pins 31. In this embodiment, three positioning pins 31 are provided. All positioning pins 31 are evenly distributed along the circumference of the positioning station 2. The upper end of the positioning pin 31 protrudes upward from the top surface of the mold core 1. The upper end of the positioning pin 31 is provided with a guide chamfer to facilitate the quick assembly and positioning of the flexible flywheel 7. The positioning pin 31 and the mold core 1 are detachably fixedly connected and can be replaced and adjusted according to the positioning hole position of different specifications of workpieces. In use, align the reference positioning hole of the flexible flywheel 7 with the positioning pin 31 and place it downwards to complete the rapid and accurate positioning of the workpiece.

[0028] Multiple sets of punch assemblies 4 are uniformly arranged in a ring around the circumference of the positioning station 2. The number of punch assemblies 4 is consistent with the number of signal holes designed for the flexible flywheel 7, and the arrangement matches the distribution position of the signal holes one by one to ensure that the hole position meets the design requirements after stamping. Each set of punch assemblies 4 is staggered back and forth along its own feed axis. The stagger distance between adjacent punch assemblies 4 along the feed direction is 0.5mm~2mm. In this embodiment, the stagger distance is 1mm. This staggered design creates a slight time difference when the blanking working end 411 of each punch 41 contacts the side wall of the flexible flywheel 7, dispersing the overall blanking force in time and space. This avoids the instantaneous concentration of blanking force that could cause local deformation of the workpiece, while also reducing the requirements for blanking power and improving the forming quality and edge smoothness of the signal holes.

[0029] Each punch assembly 4 includes a punch 41 and a punch guide sleeve 42. The punch guide sleeve 42 is embedded and fixed inside the die core 1. The punch 41 is slidably assembled in the guide hole of the punch guide sleeve 42. The guide hole of the punch guide sleeve 42 and the punch 41 have a high-precision clearance fit. The inner wall of the guide hole is provided with a lubricating layer, which can accurately guide the movement direction of the punch 41, ensure the accuracy of the punching position, and reduce the wear of the punch 41's reciprocating motion, thus extending its service life. The front end of the punch 41 facing the positioning station 2 is provided with a blanking working end 411 that matches the size of the signal hole to be processed. The blanking working end 411 has a chamfered cutting edge structure, which can reduce punching burrs and improve the forming quality of the hole wall. The outer diameter of the blanking working end 411 is consistent with the inner diameter of the signal hole to be processed, ensuring the punching dimensional accuracy.

[0030] The punch drive device 5 is fixedly installed on the outside of the mold core 1. In this embodiment, the punch drive device 5 is a pneumatic stamping mechanism, which can complete the stamping process without the need for a dedicated high-power stamping equipment. The equipment investment cost is low, which is suitable for the economic requirements of mass production. The output end of the punch drive device 5 is provided with a linkage ring structure. The tail ends of all punches 41 are connected to the linkage ring for transmission. The punch drive device 5 can drive all punches 41 to feed synchronously to the center of the positioning station 2 along the punch guide sleeve 42 through the linkage ring. This enables all signal holes on the side wall of the flexible flywheel 7 to be stamped synchronously in one go, without the need for indexing rotation and hole-by-hole processing, which significantly improves processing efficiency.

[0031] The die core 1 is equipped with an automatic scrap discharge structure 6 at the punching position of each punch 41. The scrap generated during punching can be automatically discharged downwards under the action of gravity through the automatic scrap discharge structure 6. Specifically, the automatic scrap discharge structure 6 includes a scrap discharge channel 61 opened at the punching position of the die core 1. The upper end of the scrap discharge channel 61 is directly opposite the punching position. The round scrap generated during punching directly enters the scrap discharge channel 61 under the pushing force of the punch 41. The lower end of the scrap discharge channel 61 extends to the bottom of the die core 1 to form a scrap outlet 62. The scrap discharge channel 61 is inclined downwards in the vertical direction. The inner wall of the channel is a smooth transition surface without protrusions or jamming structures. The scrap entering the scrap discharge channel 61 can slide down the channel under its own gravity and finally be automatically discharged from the outside of the die core 1 through the scrap outlet 62. There is no need to configure an additional cleaning mechanism or arrange a manual cleaning process, which simplifies the processing flow and reduces equipment and labor costs.

[0032] The top surface of the positioning station 2 is also equipped with a support pad. The top surface of the support pad is flush with the bottom of the side wall to be processed of the flexible flywheel 7. It can provide support for the side wall of the workpiece during the stamping process, avoid the side wall from being dented and deformed under the force during stamping, and further ensure the quality of punching.

[0033] The working process of this device is as follows: First, the flexible flywheel 7 to be processed is placed on the positioning station 2 of the mold core 1, and precise positioning is achieved by the cooperation of the positioning pin 31 with the workpiece reference positioning hole. Then, the punch drive device 5 is started, driving all the punches 41 to feed synchronously to the center of the positioning station 2 along the punch guide sleeve 42. Due to the staggered arrangement of the punch assembly 4, each punch 41 contacts the side wall of the workpiece in sequence and completes the punching. All signal holes are punched and formed at one time. The waste generated during the punching process is pushed into the blanking channel 61 by the punch 41, and slides down along the blanking channel 61 under the action of gravity and is automatically discharged from the waste outlet 62. After the punching is completed, the punch drive device 5 drives the punches 41 to reset synchronously, and the processed flexible flywheel 7 is taken out, and the next processing cycle can be entered.

Claims

1. A flexible flywheel punching processing device, characterized in that: The device includes a mold core (1), a positioning assembly (3), multiple sets of punch assemblies (4), and a punch drive device (5). The mold core (1) has a positioning station (2) in the middle for holding the flexible flywheel to be processed. The positioning assembly (3) is installed at the positioning station (2) of the mold core (1) for circumferential and radial positioning of the flexible flywheel. The multiple sets of punch assemblies (4) are arranged in a ring around the positioning station (2), and each set of punch assemblies (4) is staggered back and forth along its own feed axis. Each set of punch assemblies (4) includes a punch (41) and a punch guide sleeve (42), and the punch (41) is slidably assembled on the punch guide sleeve. Inside the guide hole of the sleeve (42), the punch (41) is provided with a punching working end (411) that is adapted to the size of the signal hole to be processed at the front end of the positioning station (2); the punch driving device (5) is fixedly installed on the outside of the mold core (1), and the output end of the punch driving device (5) is connected to the tail end of all punches (41) for driving all punches (41) to feed synchronously towards the center of the positioning station (2) along the punch guide sleeve (42); the mold core (1) is provided with a waste automatic dropping structure (6) at the punching position of each punch (41), and the waste generated by punching is automatically discharged downward under the action of gravity through the waste automatic dropping structure (6).

2. The flexible flywheel punching device according to claim 1, characterized in that: The positioning component (3) includes at least three positioning pins (31), all of which are evenly distributed around the circumference of the positioning station (2). The upper end of the positioning pin (31) protrudes upward from the top surface of the mold core (1) and is used to engage with the reference positioning hole on the flexible flywheel.

3. The flexible flywheel punching device according to claim 2, characterized in that: The upper end of the positioning pin (31) is provided with a guide chamfer, and the positioning pin (31) and the mold core (1) are detachably fixedly connected.

4. The flexible flywheel punching device according to claim 1, characterized in that: The staggered distance between adjacent punch assemblies (4) along the feed direction is 0.5mm to 2mm, so that there is a time difference when the punching working end (411) of each punch (41) contacts the flexible flywheel sidewall.

5. The flexible flywheel punching apparatus according to claim 1, characterized in that: The automatic waste dropping structure (6) includes a waste dropping channel (61) opened at the punching position of the die core (1). The upper end of the waste dropping channel (61) is directly opposite the punching position, and the lower end extends to the bottom of the die core (1) to form a waste outlet (62).

6. The flexible flywheel punching apparatus according to claim 5, characterized in that: The material discharge channel (61) is inclined downward in the vertical direction, and the inner wall of the channel is a smooth transition surface. The waste material slides down and is discharged under the action of gravity along the material discharge channel (61).

7. The flexible flywheel punching apparatus according to claim 1, characterized in that: The punch drive device (5) is a pneumatic stamping mechanism. The output end of the pneumatic stamping mechanism is equipped with a linkage ring, and the tail ends of all punches (41) are connected to the linkage ring for transmission.

8. The flexible flywheel punching apparatus according to claim 1, characterized in that: The punch guide sleeve (42) is embedded and fixed inside the mold core (1). The guide hole of the punch guide sleeve (42) is clearance-fitted with the punch (41), and a lubricating layer is provided on the inner wall of the guide hole.

9. The flexible flywheel punching apparatus according to claim 1, characterized in that: The top surface of the positioning station (2) is provided with a support pad, and the top surface of the support pad is flush with the bottom of the side wall to be processed of the flexible flywheel.

10. The flexible flywheel punching apparatus according to claim 4, characterized in that: The punching end (411) of the punch (41) has a chamfered cutting edge structure, and the outer diameter of the punching end (411) is consistent with the inner diameter of the signal hole to be processed.

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