A reinforcing rib integrated stamping device for an automobile seat framework

Abstract

The utility model discloses a kind of automobile seat framework reinforcing rib integrated stamping device;It includes upper die, lower die, edge ring and control system, and the innovation is integrated in upper die One set of composite high-frequency micro-impact system, the system is composed of integral vibration subsystem and local strengthening vibration subsystem;Integral vibration subsystem is connected by rigid connection in the back of main punch large-power pre-tightening piezoelectric actuator, force punch whole body produce fundamental frequency vibration, global activation material;Local strengthening vibration subsystem is inlayed small pre-tightening piezoelectric actuator in the working profile of main punch, and high-frequency resonance impact is carried out to difficult forming area such as reinforcing rib root portion;Two sets of systems are independently driven by multichannel high-voltage amplifier, and work timing and parameters are intelligently coordinated by control system;The utility model can significantly improve material fluidity, ensure that reinforcing rib is perfectly filled, effectively solve the problem of cracking and filling deficiency in high-strength steel deep rib forming, with very high industrial application value.

Description

Technical Field

[0001] This utility model relates to the field of metal sheet stamping and forming technology, and in particular to an integrated stamping device for reinforcing ribs of automobile seat frames. Background Technology

[0002] The car seat frame is an important component of the car safety system. Its strength and lightweight level are directly related to the safety of the occupants and the energy efficiency of the whole vehicle. Adding reinforcing ribs to the stamped parts of the seat frame is a key means to improve its rigidity and strength. However, in traditional stamping processes, especially when using high-strength steel plates or when forming deep and steep reinforcing ribs, technical problems such as insufficient material fluidity, incomplete filling, and micro-cracks or fractures easily appearing at the root of the reinforcing ribs are often encountered.

[0003] To address these issues, the industry typically employs methods such as adding processes (e.g., step-by-step stamping), reducing stamping speed, or using more ductile materials. However, these methods can lead to reduced production efficiency, increased costs, or failure to achieve lightweighting goals. In addition, there have been attempts to use complex control technologies such as hydraulic or servo-assisted blanking, but their effectiveness in improving material flowability is limited, and the system costs are high.

[0004] Therefore, there is an urgent need for a stamping device that can effectively promote material flow in difficult-to-form areas, improve product quality and yield, and has a compact structure that is easy to integrate into existing production lines. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an integrated stamping device for reinforcing ribs of automotive seat frames. This device significantly reduces the flow stress of the material by applying mechanical vibration of a specific frequency to the sheet metal during the stamping process, promoting the material to flow deep into the mold cavity, thereby achieving perfect forming of the reinforcing ribs.

[0006] To achieve the above objectives, this utility model provides an integrated stamping device for reinforcing ribs of an automotive seat frame, comprising an upper die assembly, a lower die assembly, and a control system. The upper die assembly includes a main punch, and the lower die assembly includes a lower die that cooperates with the main punch.

[0007] The main punch integrates a composite high-frequency micro-impact system.

[0008] The composite high-frequency micro-impact system includes an overall vibration subsystem, a locally reinforced vibration subsystem, and a multi-channel high-voltage amplifier that powers both the overall and locally reinforced vibration subsystems. The overall vibration subsystem includes at least two high-power first pre-tightened piezoelectric actuators, which are rigidly connected to the back or side of the main punch via fasteners. The locally reinforced vibration subsystem includes several small second pre-tightened piezoelectric actuators, which are embedded in mounting holes inside the main punch, with their impact end faces flush with the working surface of the main punch. The multi-channel high-voltage amplifier is signal-connected to the control system and independently connected to each of the first and second pre-tightened piezoelectric actuators.

[0009] The control system is a PLC or motion controller, which is configured to independently control the start-up timing, vibration frequency and vibration amplitude of the overall vibration subsystem and the local reinforcement vibration subsystem; the control system is configured to: start the overall vibration subsystem first during the stamping process, and then start the local reinforcement vibration subsystem later in the stamping stroke or based on sensor feedback signals.

[0010] Furthermore, this utility model provides an integrated stamping device for reinforcing ribs of an automotive seat frame, wherein the main punch is also machined with a cooling channel, which is arranged around the mounting positions of the first pre-tightened piezoelectric actuator and the second pre-tightened piezoelectric actuator; the inlet and outlet of the cooling channel are connected to an external mold temperature controller through pipes to form a forced circulation cooling circuit.

[0011] Furthermore, this utility model provides an integrated stamping device for reinforcing ribs of an automobile seat frame, wherein the first pre-tightened piezoelectric actuator in the overall vibration subsystem is symmetrically arranged on the mounting platform on the back of the main punch, and is rigidly connected to the main punch by high-strength screws.

[0012] Furthermore, this utility model provides an integrated stamping device for reinforcing ribs of an automobile seat frame, wherein the second pre-tightened piezoelectric actuator in the local reinforcement vibration subsystem is fixed in the mounting hole of the main punch by an interference fit; the axis of the mounting hole points to the root of the reinforcing rib to be formed or the stress concentration area.

[0013] Furthermore, the present invention provides an integrated stamping device for reinforcing ribs of an automobile seat frame, wherein the fundamental frequency range of the overall vibration subsystem is 500Hz to 1500Hz, and the local resonant impact frequency range of the local reinforcement vibration subsystem is 2000Hz to 5000Hz.

[0014] Compared with the prior art, the integrated stamping device for reinforcing car seat frames of this utility model has the following advantages:

[0015] During the stamping process, the control system first instructs the overall vibration subsystem to start, causing the main punch to vibrate at a low frequency (e.g., 500-1500Hz), which globally "activates" the sheet metal and reduces its average deformation resistance. Subsequently or simultaneously, at the critical stage of the stamping stroke, the control system instructs the local reinforcement vibration subsystem to start, which performs high-frequency (e.g., 2000-5000Hz) micro-impact on the most difficult-to-fill areas. This composite vibration mode of "overall softening and local forging" produces a synergistic effect, which can effectively solve the problems of insufficient material filling and root cracking, and significantly improve the forming depth and quality of the reinforcing ribs. At the same time, the device can be directly integrated into existing presses, with low modification costs, strong adaptability, and high industrial application value. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an integrated stamping device for reinforcing ribs of an automobile seat frame according to the present invention.

[0017] Figure 2 for Figure 1 Schematic diagram of the structure with changing perspective;

[0018] Figure 3 This is an exploded view of the integrated stamping device for reinforcing ribs of an automobile seat frame according to this utility model.

[0019] Figure 4 for Figure 3 Schematic diagram of the structure with changing perspective.

[0020] The components are: 1. Main punch; 2. Lower die; 3. First pre-tightened piezoelectric actuator; 4. Second pre-tightened piezoelectric actuator; 5. Mounting hole; 6. Impact end face; 7. Cooling channel; 8. Mounting platform. Detailed Implementation

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

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figures 1-4 As shown, this embodiment provides an integrated stamping device for reinforcing ribs of an automotive seat frame, which includes an upper die assembly, a lower die assembly, and a control system. The upper die assembly includes a main punch 1, and the lower die assembly includes a lower die 2 that cooperates with the main punch 1.

[0025] The main punch 1 is integrated with a composite high-frequency micro-impact system;

[0026] The composite high-frequency micro-impact system includes an overall vibration subsystem, a locally enhanced vibration subsystem, and a multi-channel high-voltage amplifier that powers both the overall and locally enhanced vibration subsystems. The overall vibration subsystem includes at least two high-power first pre-tightened piezoelectric actuators 3, which are rigidly connected to the back or side of the main punch 1 via fasteners. The fundamental frequency range of the overall vibration subsystem is 500Hz to 1500Hz. The locally enhanced vibration subsystem includes several small second pre-tightened piezoelectric actuators 4, which are embedded in mounting holes 5 inside the main punch 1, with their impact end faces 6 flush with the working surface of the main punch 1. The local resonant impact frequency range of the locally enhanced vibration subsystem is 2000Hz to 5000Hz. The multi-channel high-voltage amplifier is signal-connected to the control system and independently connected to each of the first and second pre-tightened piezoelectric actuators 3 and 4.

[0027] The main punch 1 is also machined with a cooling channel 7, which is arranged around the installation positions of the first pre-tightened piezoelectric actuator 3 and the second pre-tightened piezoelectric actuator 4. The inlet and outlet of the cooling channel 7 are connected to an external mold temperature controller through pipes to form a forced circulation cooling circuit.

[0028] The first pre-tightened piezoelectric actuator 3 in the overall vibration subsystem is symmetrically arranged on the mounting platform 8 on the back of the main punch 1 and is rigidly connected to the main punch 1 by high-strength screws; the second pre-tightened piezoelectric actuator 4 in the local reinforcement vibration subsystem is fixed in the mounting hole 5 of the main punch 1 by interference fit; the axis of the mounting hole 5 points to the root of the reinforcing rib to be formed or the stress concentration area;

[0029] The control system is a PLC or motion controller, which is configured to independently control the start-up timing, vibration frequency and vibration amplitude of the overall vibration subsystem and the local reinforcement vibration subsystem. During the stamping process, the overall vibration subsystem is started first, and the local reinforcement vibration subsystem is started later in the stamping stroke or based on sensor feedback signals.

[0030] Example

[0031] The integrated stamping device for reinforcing car seat frames in this embodiment mainly includes an upper die assembly, a lower die assembly, and a control system.

[0032] The upper mold assembly includes, from top to bottom, an upper template, a punch fixing plate, and a main punch 1. The upper template is used to connect with the slider of the press. The punch fixing plate is fixed to the upper template by bolts. The main punch 1 is fixed to its lower part by bolts and positioning pins. The working surface of the main punch 1 corresponds to the shape of the reinforcing rib of the car seat frame to be formed.

[0033] The lower mold assembly includes a lower mold 2, whose cavity cooperates with the main punch 1 to jointly form the final shape of the reinforcing rib;

[0034] The core improvement of this solution lies in the composite high-frequency micro-impact system integrated within the upper mold assembly;

[0035] Overall vibration subsystem: On the back of the main punch 1, two flat mounting platforms 8 are symmetrically machined. Two high-power first preloaded piezoelectric actuators 3 are fastened to these two mounting platforms 8 by four high-strength internal hexagon screws. To ensure efficient transmission of vibration energy, high thermal conductivity silicone grease is applied between the mounting platform 8 and the base of the first preloaded piezoelectric actuator 3 to improve contact. The preload torque of the screws is strictly calculated and controlled to ensure connection rigidity. When the two first preloaded piezoelectric actuators 3 are driven in the same frequency and phase, they together force the main punch 1 to generate fundamental frequency vibration along the stamping direction.

[0036] Localized Vibration Enhancement Subsystem: On the main punch 1, corresponding to the root end position of the seat frame reinforcing rib, multiple interference fit mounting holes 5 are machined vertically downward. Multiple second pre-tightened piezoelectric actuators 4 are tightly pressed into and fixed in the mounting holes 5 by their outer walls interfering with each other. After installation, the impact end faces 6 of these small second actuators are precision ground to ensure that they are perfectly flush with the working surface of the main punch 1, so that high-frequency impact force can be directly applied to the plate.

[0037] Cooling system: Inside the main punch 1, a complex cooling channel 7 is machined by means of cross drilling and process hole sealing. The path of the channel closely surrounds all the first preloaded piezoelectric actuators 3. The inlet and outlet of the cooling channel 7 are connected to the external mold temperature controller 15 through hoses to form a forced circulation cooling loop, which continuously removes the heat generated by the actuators during operation, ensuring the stability and life of the system.

[0038] Control system: The control system is based on a PLC / motion controller. It receives stroke signals from the press or internal preset programs. The input terminal of the multi-channel high-voltage amplifier is connected to the digital output terminal of the PLC / motion controller 14. Its high-voltage output terminal is connected to the electrical interface of each first pre-tightened piezoelectric actuator 3 and the second pre-tightened piezoelectric actuator 4 through high-voltage resistant cables. The mold temperature controller and power supply provide cooling protection and power supply for the entire system.

[0039] During operation, the press slide moves the upper die assembly downwards. Then, the main punch 1 contacts the sheet metal and begins applying pressure. When the pressure reaches the set value, the PLC / motion controller issues a command, and the multi-channel high-voltage amplifier drives the first pre-tightened piezoelectric actuator 3 to operate. The main punch 1 then begins to vibrate as a whole at a frequency of 800Hz. When the stamping stroke reaches 85%, the PLC / motion controller activates the second pre-tightened piezoelectric actuator 4, causing it to impact the root of the reinforcing rib at a frequency of 2500Hz until the stroke ends. After stamping is complete, all vibrations stop, the upper die returns, and the workpiece is ejected by the ejection device in the lower die 2.

[0040] The parts not described in detail in this utility model, including the pre-tensioned piezoelectric actuator, PLC / motion controller, and multi-channel high-voltage amplifier, are all technologies known to those skilled in the art.

[0041] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An integrated stamping device for reinforcing ribs of an automobile seat frame, characterized in that, It includes an upper mold assembly, a lower mold assembly, and a control system. The upper mold assembly includes a main punch (1), and the lower mold assembly includes a lower mold (2) that cooperates with the main punch (1). The main punch (1) integrates a composite high-frequency micro-impact system; The composite high-frequency micro-impact system includes an overall vibration subsystem, a local enhanced vibration subsystem, and a multi-channel high-voltage amplifier that powers the overall vibration subsystem and the local enhanced vibration subsystem. The overall vibration subsystem includes at least two high-power first pre-tightened piezoelectric actuators (3), which are rigidly connected to the back or side of the main punch (1) by fasteners. The local enhanced vibration subsystem includes several small second pre-tightened piezoelectric actuators (4), which are embedded in mounting holes (5) inside the main punch (1), and their impact end faces (6) are flush with the working surfaces of the main punch (1). The multi-channel high-voltage amplifier is signal-connected to the control system and independently connected to each of the first pre-tightened piezoelectric actuators (3) and the second pre-tightened piezoelectric actuators (4).

2. The integrated stamping device for reinforcing ribs of an automobile seat frame according to claim 1, characterized in that, The main punch (1) is also machined with a cooling channel (7), which is arranged around the installation positions of the first pre-tightened piezoelectric actuator (3) and the second pre-tightened piezoelectric actuator (4). The inlet and outlet of the cooling channel (7) are connected to an external mold temperature controller through pipes to form a forced circulation cooling circuit.

3. The integrated stamping device for reinforcing ribs of an automobile seat frame according to claim 1, characterized in that, The first pre-tightened piezoelectric actuator (3) in the overall vibration subsystem is symmetrically arranged on the mounting platform (8) on the back of the main punch (1) and is rigidly connected to the main punch (1) by high-strength screws.

4. The integrated stamping device for reinforcing ribs of an automobile seat frame according to claim 1, characterized in that, The second pre-tightened piezoelectric actuator (4) in the local reinforced vibration subsystem is fixed in the mounting hole (5) of the main punch (1) by interference fit; the axis of the mounting hole (5) points to the root of the reinforcing rib to be formed or the stress concentration area.

5. The integrated stamping device for reinforcing ribs of an automobile seat frame according to claim 1, characterized in that, The fundamental frequency range of the overall vibration subsystem is 500Hz to 1500Hz, and the local resonant impact frequency range of the locally enhanced vibration subsystem is 2000Hz to 5000Hz.

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