Electric cylinder type fin forming machine

Abstract

The utility model discloses an electric cylinder type fin forming machine which comprises a rack, an upper die base plate, a lower die base plate and a lower die sliding plate. The upper mold base plate is driven by an upper mold electric cylinder, and the lower mold base plate is driven by a lower mold electric cylinder to realize relative movement in the vertical direction, so that mold closing and mold opening are completed; an electric cylinder in the middle of the bottom of the lower die base plate drives the lower die sliding plate to horizontally move, and fin bending is achieved. The control system independently controls the displacement, speed and acceleration of each electric cylinder, and a connection displacement sensor, a pressure sensor and a temperature sensor monitor forming parameters in real time and dynamically adjust the forming parameters. The upper / lower die substrate is provided with a die positioning structure to support quick replacement of dies of different specifications; the rack is provided with protective devices such as a safety grating and a detachable protective cover, moving parts are isolated, and safety is guaranteed. A traditional mechanical cam is replaced with electric cylinder driving, the problems that existing equipment is low in automation degree, poor in die adaptation and insufficient in safety are solved, and the automatic fin die changing device has the advantages of high-precision control, efficient die changing, safety, reliability and the like and is suitable for automatic production of fins of multiple specifications.

Description

Technical Field

[0001] This invention relates to the field of fin forming equipment technology, specifically to a fin forming machine that uses an electric cylinder to achieve high-precision motion control and integrates an intelligent sensing system. It is suitable for the automated stamping production of heat exchanger fins, and particularly relates to the efficient forming of fins of various specifications such as straight fins and corrugated fins. Background Technology

[0002] As a core component of heat exchange equipment (such as radiators and condensers), the forming quality of fins directly affects heat exchange efficiency. Traditional fin forming machines generally adopt a mechanical stamping structure, using a motor-driven cam mechanism to convert rotary motion into linear motion, thereby achieving the stamping and bending of metal sheets. However, such equipment has the following significant drawbacks:

[0003] 1. Insufficient motion control precision: Relying on the fixed contour curve drive of mechanical cams, the displacement, speed and acceleration of the upper and lower templates cannot be dynamically adjusted in real time, making it difficult to meet the differentiated requirements of different fins (such as high fins with a height of more than 10mm or ultra-thin fins) for forming pressure and stroke.

[0004] 2. Low mold replacement efficiency: Mold installation relies on manual alignment and bolt fixing, lacks standardized positioning structure, and time is required to adjust mechanical limits when changing to different specifications of molds, resulting in long downtime and making it unsuitable for multi-variety small-batch production mode;

[0005] 3. Outdated safety protection design: Moving parts (such as stamping slides) are exposed, which can easily lead to safety accidents due to accidental contact by operators. In addition, traditional protective devices obstruct the operator's field of vision, making it inconvenient for equipment debugging and mold observation.

[0006] 4. Lack of intelligence: It lacks a real-time sensing feedback mechanism, making it impossible to monitor key parameters such as pressure, temperature, and displacement during the molding process, and making it difficult to achieve quality traceability and process optimization.

[0007] Therefore, there is an urgent need for an electric cylinder fin forming equipment that can accurately control forming parameters, support rapid mold changing, and has intelligent safety protection, in order to solve the technical bottlenecks of traditional mechanical equipment. Through the coordinated movement of multiple electric cylinders, real-time sensor feedback, and rapid positioning structure, high-precision control, efficient mold changing, and safety protection of the fin forming process can be achieved to meet diverse production needs. Summary of the Invention

[0008] The purpose of this invention is to provide an automated fin stamping production equipment to solve the problems mentioned in the background art.

[0009] An electric cylinder type fin forming machine includes a frame, an upper mold base plate and a lower mold base plate installed within the frame, and a lower mold slide plate installed on the lower mold base plate. Guide rails are provided on both sides of the frame sidewalls. The upper mold base plate and the lower mold base plate are movably installed within the frame of the frame via the guide rails and move relative to each other within the frame of the frame along the guide rails. The machine is characterized by:

[0010] The upper mold base plate is mounted on the upper frame of the machine frame via an upper mold electric cylinder, and the upper mold electric cylinder drives the upper mold base plate to move downward in the vertical direction; the lower mold base plate is mounted on the lower frame of the machine frame via a lower mold electric cylinder, and the lower mold electric cylinder drives the lower mold base plate to move upward in the vertical direction, so as to realize the mold closing and mold opening actions between the upper mold and the lower mold.

[0011] A central electric cylinder is provided at the bottom of the lower mold base plate. The push rod of the central electric cylinder is connected to the lower mold slide plate, driving the lower mold slide plate to move in the horizontal direction (front and back direction) to complete the bending action in the fin forming process.

[0012] Furthermore: the guide rail is a guide post, installed on the upper part of the frame. The upper mold base plate and the lower mold base plate are provided with guide post holes. The upper mold base plate and the lower mold base plate are movably installed on the guide post through the guide post holes and move relative to each other along the guide post within the frame of the machine. Return springs are respectively installed on the guide post, and the return springs connect the upper mold base plate and the lower mold base plate to the upper frame and the lower frame of the machine, respectively. The return springs restrict the upper mold base plate and the lower mold base plate to the middle of the inner frame of the machine.

[0013] Furthermore, the upper mold electric cylinder, lower mold electric cylinder, and intermediate electric cylinder are all connected to a control system. The control system independently controls the displacement, speed, and acceleration of each electric cylinder to achieve precise control of the fin forming process.

[0014] Furthermore, the travel distances of the upper mold electric cylinder driving the upper mold base plate to move downward in the vertical direction, the lower mold electric cylinder driving the lower mold base plate to move upward in the vertical direction, and the lower mold slide plate moving in the horizontal direction (front and back direction) can be adjusted according to the control program, with an adjustment range of 1-30mm.

[0015] Furthermore: the frame is equipped with a protective device, which includes a safety light curtain or a protective cover, used to isolate the operator from the upper mold base plate, lower mold slide plate, and electric cylinder push rod during equipment operation. The safety light curtain forms a protective area by emitting infrared beams, and triggers the equipment to stop when personnel enter. The protective cover is a detachable metal or polymer sheet structure that covers the outside of the moving parts of the frame.

[0016] Furthermore, a QR code scanner is provided on the lower part of the upper mold base plate. When the equipment changes the mold, the QR code information on the mold is scanned and input into the control system. The control system automatically loads the molding parameters corresponding to the mold (such as mold closing stroke and bending angle).

[0017] Furthermore: the control system is connected to a sensor array, including:

[0018] Displacement sensors are installed at the connection between the cylinder body and the push rod of each electric cylinder to monitor the displacement of the push rod in real time.

[0019] Pressure sensors are installed on the contact surfaces between the upper mold base plate and the upper mold, and between the lower mold base plate and the lower mold to monitor the pressure between the molds;

[0020] A temperature sensor is installed in a key part of the mold near the fin forming area to collect the forming temperature in real time.

[0021] The sensor array feeds data back to the control system to enable dynamic adjustment of molding parameters. Attached Figure Description

[0022] Figure 1 The three-dimensional structural diagram of the present invention (the protective device is not fully shown) shows the installation positions of the frame, the upper mold electric cylinder, the lower mold electric cylinder, and the lower mold slide plate;

[0023] Figure 2 The main view of the present invention shows the installation positions of the frame, the upper mold electric cylinder, the lower mold electric cylinder and the lower mold slide, as well as the relative motion relationship between each sensor and its corresponding upper mold base plate and lower mold base plate, and the connection structure between the intermediate electric cylinder and the lower mold slide.

[0024] Figure 3 :along Figure 2 A cross-sectional view along the AA direction shows the relative motion between the upper mold base plate and the lower mold base plate, as well as the connection structure between the intermediate electric cylinder and the lower mold slide plate.

[0025] Figure 4 : A structural diagram of the lower mold slide plate, showing the position of the connecting seat on the lower mold slide plate;

[0026] Figure 5 : A schematic diagram of the structure of Embodiment 2 of the present invention, showing the relationship between the guide post and the reset spring and the upper and lower substrates;

[0027] Figure 6 The logic block diagram of the control system shows the signal interaction process between the electric cylinder drive, sensor group, and control system.

[0028] In the figure: frame (100), upper frame (110), lower frame (120), guide rail (130), reset spring (140), upper mold base plate (200), upper mold (201), upper mold electric cylinder (210), lower mold base plate (300), lower mold (301), lower mold electric cylinder (310), lower mold slide plate (400), connecting seat (401), intermediate electric cylinder (410), human-machine interface control box (500), displacement sensor (501), pressure sensor (502), temperature sensor (503), barcode scanner (504), safety light curtain (600), protective cover (601); Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings. Example

[0030] like Figure 1-3 As shown, an electric cylinder type fin forming machine includes a frame (100) and an upper mold base plate (200), a lower mold base plate (300), and a lower mold slide plate (400) installed within the frame (100). The fins move vertically relative to each other along guide rails (130) within the frame. The specific structure is as follows:

[0031] 1. Electric cylinder drive system

[0032] Mold closing / opening mechanism: The upper mold base plate (200) is mounted on the upper frame (110) of the frame (100) via an upper mold electric cylinder (210). The cylinder body of the upper mold electric cylinder (210) is fixed to the upper frame (110), and the push rod is connected to the top of the upper mold base plate (200) to drive the upper mold base plate (200) to move downward in the vertical direction; the lower mold base plate (300) is mounted on the lower frame (120) of the frame (100) via a lower mold electric cylinder (310). The cylinder body of the lower mold electric cylinder (310) is fixed to the lower frame (120), and the push rod of the lower mold electric cylinder is connected to the bottom of the lower mold base plate (300) to drive the lower mold base plate (300) to move upward in the vertical direction; the upper mold base plate (200) and the lower mold base plate (300)

[0033] The guide rail (130) is mounted on the side wall of the frame (100), and its slider is connected to the upper mold base plate (200) and the lower mold base plate (300) respectively, so as to control the guide rail (130) to control the accuracy of the upper mold base plate (200) and the lower mold base plate (300) in vertical linear motion.

[0034] By using the synchronous or asynchronous movement of the upper mold electric cylinder (210) and the lower mold electric cylinder (310), the upper mold (201) and the lower mold (301) can be accurately closed (relatively close) and quickly opened (relatively separate), thereby replacing the mechanical unidirectional force delivery drive structure in traditional equipment, omitting the spring demolding device, and reducing energy consumption.

[0035] Bending and forming mechanism: such as Figure 4 As shown, the bottom of the lower mold slide plate (400) is provided with a connecting seat (401), and the lower mold base plate (300) is provided with a through groove for the connecting seat (401) to move. An intermediate electric cylinder (410) is fixedly installed at the center of the bottom of the lower mold base plate (300). The push rod of the intermediate electric cylinder (410) extends in the horizontal direction (front and back direction) and is fixedly connected to the connecting seat (401) at the bottom of the lower mold slide plate (400). Driving the lower mold slide plate (400) allows it to slide back and forth on the table surface of the lower mold base plate (300), thereby realizing the horizontal displacement control of the bending process during fin forming.

[0036] 2. Intelligent Control System

[0037] The upper mold electric cylinder (210), lower mold electric cylinder (310), and intermediate electric cylinder (410) are all connected to the control system via servo drives. This control system is installed in a human-machine interface control box (500). The control system uses a PLC or industrial computer and can independently set the displacement stroke (accuracy ±0.05mm), movement speed (adjustable from 0-200mm / s), and acceleration curve (such as trapezoidal or S-shaped curve) of each electric cylinder. Precise control of the mold closing pressure and bending angle is achieved through a multi-axis motion control algorithm. The coordination relationships between its various parts are as follows: Figure 6 As shown.

[0038] 3. Quick mold change system

[0039] The upper surfaces of both the upper mold base plate (200) and the lower mold base plate (300) are provided with mold positioning structures, including: main positioning components: two symmetrically distributed conical positioning pins and positioning holes, with a conical surface fit tolerance of H7 / h6, to ensure quick alignment during mold installation.

[0040] 4. Security Protection System

[0041] The front and rear sides of the frame (100) are equipped with protective devices, which include: a safety light curtain (600), which is installed at the front opening of the frame (100), and consists of a transmitter and a receiver. It emits infrared beams to form a protective plane with a spacing of 150mm. When a person's limb enters the danger zone, the control system (500) immediately triggers all electric cylinders to stop in an emergency, with a response time of <50ms; and a detachable protective cover (602): a metal frame structure covering the front and rear sides of the frame (100). The surface is made of a combination of transparent acrylic sheet and aluminum alloy profile, with a reserved openable observation window. A contact switch is provided at the pivot of the protective cover (602). The equipment cannot be started when the protective cover (602) is opened.

[0042] 5. Intelligent Sensing System

[0043] The control system (500) is connected to a sensor group to collect data on the molding process in real time.

[0044] Displacement sensor (501): Magnetostrictive displacement sensor, installed at the connection between the push rod and its corresponding part of each electric cylinder, with a resolution of 0.01mm, monitors the push rod stroke in real time and feeds it back to the control system;

[0045] Pressure sensor (502): a resistance strain gauge sensor, embedded in the contact surface between the upper mold base plate (200) and the upper mold (201), and the contact surface between the lower mold base plate (300) and the lower mold (301), with a range of 0-50kN and an accuracy of ±0.5%FS, used to monitor the pressure value when the mold is closed and prevent overload damage;

[0046] Temperature sensor (503): K-type thermocouple, installed in the core part of the mold (201 / 301) near the fin forming area (≤5mm from the forming surface), to collect temperature data in real time (measurement range -20℃~400℃), and trigger an alarm when the temperature is abnormal (such as exceeding the temperature resistance threshold of the mold material).

[0047] The frame (100) adopts a welded steel frame with adjustable feet at the bottom for horizontal calibration. A linear guide rail (150) is set in the vertical direction inside the frame. The upper mold base plate (200) and the lower mold base plate (300) cooperate through the guide rail (150) to ensure the stability of vertical movement.

[0048] In use, the operator triggers the power-on function through the human-machine interface (500), and the control system automatically enters the active detection mode to detect the operating parameters of the upper mold substrate (200) and the lower mold substrate (300). After the detection is completed, the system automatically switches to the working state.

[0049] Taking a fin with a punching height of 20mm and a width of 5mm as an example: After the system is turned on and the equipment completes the system test, the system enters the working state. The upper electric cylinder (210) first moves down to 20mm according to the system command, that is, the punch of the upper die (201) punches down the metal sheet by 20mm, and then the upper electric cylinder (210) stops moving. The lower electric cylinder (310) retracts down by 20mm, driving the lower die (301) to come out. After the lower die (301) returns to its position, the middle electric cylinder (410) starts to work, pushing the lower die slide plate (400) to drive the lower die (301) to move forward horizontally by 5mm, completing the horizontal folding of the metal sheet. At this time, both the upper electric cylinder (210) and the lower electric cylinder (310) are in a stopped state. After the middle electric cylinder (410) completes the horizontal push, it stops. The system instructs the lower electric cylinder (310) to move upward 20mm, thus realizing the U-shaped bending of the metal sheet. After the metal sheet is bent upward, the lower electric cylinder (310) stops, and the upper electric cylinder (210) moves back 20mm to return to its original position, removing the upper mold (201). The upper electric cylinder (210) and the lower electric cylinder (310) stop working. The middle electric cylinder (410) pulls the middle slide plate (400) forward 5mm to complete the punching of the first fin. This cycle is repeated to complete the production and processing of the fin.

[0050] When changing molds, the operator triggers the "mold changing mode" through the human-machine interface (500). The control system controls the upper mold base plate (200) and the lower mold base plate (300) to open, so that the upper and lower molds are in a disengaged state. After removing the old mold, the positioning hole of the new mold is aligned with the positioning pin on the base plate, pushed into place and clamped and fixed. At the same time, the QR code on the mold is recognized by the barcode scanner (504), and the control system automatically loads the molding parameters corresponding to the mold (such as mold closing stroke and bending angle).

[0051] When the equipment is running, the safety light curtain (601) monitors the operating area in real time. If a person accidentally touches the protected area, the power supply of the electric cylinder will be cut off and the brake will be applied immediately. The sensor group will upload displacement, pressure and temperature data to the control system in real time. The electric cylinder motion parameters will be dynamically adjusted through the PID algorithm. For example, when the pressure sensor (502) detects that the mold closing pressure exceeds the set value, the feed speed of the upper mold electric cylinder (210) will be automatically reduced to avoid damage to the mold.

[0052] In summary, this invention replaces the traditional mechanical cam with an electric cylinder drive, and combines intelligent sensing and rapid mold changing technology to significantly improve the accuracy, efficiency and safety of fin forming, making it suitable for integrated applications in automated production lines. Example

[0053] like Figure 5 As shown; in order to control the vertical movement of the upper and lower mold substrates, guide pillars are used instead of guide rails (130) in this embodiment to provide guidance for the upper mold substrate (200) and the lower mold substrate (300).

[0054] To facilitate the installation of the guide pillars, guide pillar holes are added at the opposite positions of the upper die base plate (200) and the lower die base plate (300), allowing the upper die base plate (200) and the lower die base plate (300) to be movably mounted on the guide rail (130). This design makes the frame more stable, reduces motion friction, and improves vertical accuracy. Simultaneously, return springs (140) can be added to the guide pillars. The return spring (140) connected to the upper die base plate (200) is a tension spring, while the return spring (140) connected to the lower die base plate is a tension spring. The spring force offsets part of the weight of the upper die base plate (200) and the lower die base plate (300), reducing the load on the electric cylinder. It also assists in the reset of the upper and lower die base plates after stamping. Through guide pillar guidance and spring assistance, the stability of equipment operation is improved, the energy consumption of the electric cylinder is reduced, and the efficiency and reliability of the stamping action are optimized.

Claims

1. An electric cylinder type fin forming machine, comprising a frame, an upper mold base plate and a lower mold base plate installed within the frame, and a lower mold slide plate installed on the lower mold base plate, wherein guide rails are provided on both sides of the side wall of the frame, and the upper mold base plate and the lower mold base plate are movably installed within the frame of the frame via the guide rails, and move relative to each other within the frame of the frame along the guide rails, characterized in that: The upper mold base plate is mounted on the upper frame of the machine frame via an upper mold electric cylinder, and the upper mold electric cylinder drives the upper mold base plate to move downward in the vertical direction; the lower mold base plate is mounted on the lower frame of the machine frame via a lower mold electric cylinder, and the lower mold electric cylinder drives the lower mold base plate to move upward in the vertical direction, so as to realize the mold closing and mold opening actions between the upper mold and the lower mold. A central electric cylinder is provided at the bottom of the lower mold base plate. The push rod of the central electric cylinder is connected to the lower mold slide plate, driving the lower mold slide plate to move horizontally to complete the bending action in the fin forming process.

2. The electric cylinder type fin forming machine according to claim 1, characterized in that... The guide rail is a guide post, which is installed on the upper part of the frame. The upper mold base plate and the lower mold base plate are provided with guide post holes. The upper mold base plate and the lower mold base plate are movably installed on the guide post through the guide post holes and move relative to each other along the guide post within the frame of the frame. Return springs are respectively installed on the guide post, and the return springs connect the upper mold base plate and the lower mold base plate to the upper frame and the lower frame of the frame, respectively. The return springs restrict the upper mold base plate and the lower mold base plate to the middle of the inner frame of the frame.

3. The electric cylinder type fin forming machine according to claim 1, characterized in that, The upper mold electric cylinder, lower mold electric cylinder, and intermediate electric cylinder are all connected to a control system. The control system independently controls the displacement, speed, and acceleration of each electric cylinder to achieve precise control of the fin forming process.

4. The electric cylinder type fin forming machine according to claim 1 or 2, characterized in that, The travel distances of the upper mold electric cylinder driving the upper mold base plate to move downward in the vertical direction, the lower mold electric cylinder driving the lower mold base plate to move upward in the vertical direction, and the lower mold slide plate moving horizontally can be adjusted according to the control program, with an adjustment range of 1-30mm.

5. The electric cylinder type fin forming machine according to claim 1, characterized in that, The frame is equipped with a protective device, which includes a safety light curtain or a protective cover, used to isolate the operator from the upper mold base plate, lower mold slide plate, and electric cylinder push rod during equipment operation. The safety light curtain forms a protective area by emitting infrared beams, and the collected data is input into the control system. When personnel enter, the equipment is triggered to stop. The protective cover is a detachable metal or polymer sheet structure that covers the outside of the moving parts of the frame.

6. The electric cylinder type fin forming machine according to claim 1, characterized in that, The lower part of the upper mold base plate is equipped with a QR code scanner. When the equipment changes the mold, the QR code information on the mold is scanned and input into the control system. The control system automatically loads the molding parameters corresponding to the mold.

7. The electric cylinder type fin forming machine according to claim 3, characterized in that, The control system is connected to a sensor array, including: Displacement sensors are installed at the connection between the cylinder body and the push rod of each electric cylinder to monitor the displacement of the push rod in real time. Pressure sensors are installed on the contact surfaces between the upper mold base plate and the upper mold, and between the lower mold base plate and the lower mold to monitor the pressure between the molds; A temperature sensor is installed in a key part of the mold near the fin forming area to collect the forming temperature in real time. The sensor array feeds data back to the control system to enable dynamic adjustment of molding parameters.

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