Electric cylinder type intelligent fin forming machine

Abstract

The invention discloses an electric cylinder type intelligent 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] The present invention relates to the technical field of fin forming equipment, and specifically to a fin forming machine that realizes high-precision motion control through electric cylinder drive and has an integrated intelligent sensing system. The present invention is suitable for the automated stamping production of heat exchanger fins, and in particular to the efficient forming of fins of various specifications such as straight fins and corrugated fins. Background Art

[0002] As the core component of heat exchange equipment (such as radiators and condensers), the quality of fin forming directly affects the heat exchange efficiency. Traditional fin forming machines generally use a mechanical stamping structure, which converts rotary motion into linear motion through a motor-driven cam mechanism to achieve stamping and bending of metal sheets. However, this type of equipment has the following significant defects: 1. Insufficient motion control accuracy: Relying on the fixed profile curve drive of the mechanical cam, the displacement, speed and acceleration of the upper and lower templates cannot be adjusted dynamically 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; 2. Low efficiency of mold replacement: mold installation relies on manual alignment and bolt fixing, lacks standardized positioning structure, and requires time-consuming adjustment of mechanical limits when replacing molds of different specifications, resulting in long downtime and unable to adapt to the multi-variety small batch production mode; 3. Outdated safety protection design: Moving parts (such as stamping slides and transmission connecting rods) are exposed, and operators are prone to accidental touches, and traditional protective devices (such as fixed fences) block the operator's field of vision, making it inconvenient for equipment debugging and mold observation; 4. Lack of intelligence: There is a lack of real-time sensor feedback mechanism, which makes it impossible to monitor key parameters such as pressure, temperature, displacement, etc. during the molding process, making it difficult to achieve quality traceability and process optimization.

[0003] Therefore, there is an urgent need for an electric cylinder fin forming equipment that can accurately control forming parameters, support rapid mold change, and have intelligent safety protection to solve the technical bottleneck of traditional mechanical equipment. Through the coordinated movement of multiple electric cylinders, real-time feedback from sensors and rapid positioning structure, high-precision control, efficient mold change and safety protection of the fin forming process can be achieved to meet diversified production needs. Summary of the invention

[0004] The purpose of the present invention is to provide an automated fin stamping production equipment to solve the problems raised in the above background technology.

[0005] An electric cylinder type intelligent fin forming machine, comprising a frame, an upper die substrate and a lower die substrate installed in the frame, and a lower die slide plate installed on the lower die substrate. Guide rails are arranged on both sides of the side wall of the frame. The upper die substrate and the lower die substrate are movably installed in the frame of the frame through the guide rails and move relative to each other along the guide rails in the frame of the frame. It is characterized in that: The upper die substrate is installed on the upper frame of the frame through an upper die electric cylinder, and the upper die electric cylinder drives the upper die substrate to move downward in the vertical direction; the lower die substrate is installed on the lower frame of the frame through a lower die electric cylinder, and the lower die electric cylinder drives the lower die substrate to move upward in the vertical direction to realize the mold closing and mold opening actions between the upper die and the lower die; An intermediate electric cylinder is arranged at the bottom of the lower die substrate, and a push rod of the intermediate electric cylinder is connected to the lower die slide plate to drive the lower die slide plate to move in the horizontal direction (front-back direction) to complete the bending action in the fin forming process.

[0006] Further: The guide rails are guide columns installed on the upper part of the frame. Guide column holes are provided on the upper die substrate and the lower die substrate. The upper die substrate and the lower die substrate are movably installed on the guide columns through the guide column holes and move relative to each other along the guide columns in the frame of the frame; return springs are respectively sleeved on the guide columns, and the upper die substrate and the lower die substrate are respectively connected to the upper frame and the lower frame of the frame through the return springs. Through the return springs, the upper die substrate and the lower die substrate are restricted to the middle of the inner frame of the frame Further: The upper die electric cylinder, the lower die electric cylinder and the intermediate electric cylinder are all connected to a control system, and the control system independently controls the displacement, speed and acceleration of each electric cylinder to realize the precise control of the fin forming process.

[0007] Further: The stroke distances of the upper die electric cylinder driving the upper die substrate to move downward in the vertical direction, the lower die electric cylinder driving the lower die substrate to move upward in the vertical direction, and the lower die slide plate moving in the horizontal direction (front-back direction) can be adjusted according to the control program, and the adjustment range is 1-30 mm.

[0008] Further: A protection device is arranged on the frame. The protection device isolates the operator from the moving parts during the operation of the equipment. The protection device can be a safety light curtain or a protective cover, etc., for isolating the operator from the moving parts (such as the upper die substrate, the lower die slide plate, the electric cylinder push rod, etc.) during the operation of the equipment. The safety light curtain forms a protection area by emitting infrared light beams, and triggers the equipment to stop when a person enters; the protective cover is a detachable metal or polymer plate structure, covering the outside of the moving parts of the frame.

[0009] Further: A QR code scanner is provided at the lower part of the upper die substrate. When the mold is replaced on the equipment, the QR code information on the mold is input into the control system through the scanner, and the control system automatically loads the corresponding molding parameters of the mold (such as the mold closing stroke, bending angle). Further: The control system is connected with a sensor group, including: A displacement sensor is 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; A pressure sensor is installed on the contact surfaces between the upper die substrate and the upper die, and between the lower die substrate and the lower die to monitor the pressure between the molds; A temperature sensor is installed at the key parts of the mold near the fin forming area to collect the forming temperature in real time; The sensor group feeds back the data to the control system to realize the dynamic adjustment of the molding parameters. Description of the Drawings

[0010] Figure 1 : The three-dimensional structure schematic diagram of the present invention (the protection device is not fully shown), showing the installation positions of the frame, the upper die electric cylinder, the lower die electric cylinder and the lower die slide plate; Figure 2 : The front view structure schematic diagram of the present invention, showing the installation positions of the frame, the upper die electric cylinder, the lower die electric cylinder and the lower die slide plate, as well as the relative movement relationship between each sensor and its corresponding upper die substrate and lower die substrate, and the connection structure between the intermediate electric cylinder and the lower die slide plate; Figure 3 : Along Figure 1 The cross-sectional view in the A-A direction in shows the relative movement relationship between the upper die substrate and the lower die substrate, and the connection structure between the intermediate electric cylinder and the lower die slide plate; Figure 4 : The structure schematic diagram of the lower die slide plate, showing the position of the connecting seat on the lower die slide plate; Figure 5 : The structure schematic diagram of Embodiment 2 of the present invention, showing the relationship between the guide post and the return spring and the upper and lower substrates; Figure 6 : The logic block diagram of the control system, showing the signal interaction process between the electric cylinder drive, the sensor group and the control system.

[0011] In the figure: frame (100), upper frame of the frame (110), lower frame of the frame (120), guide rail (130), return spring (140), upper die base plate (200), upper die (201), upper die electric cylinder (210), lower die base plate (300), lower die (301), lower die electric cylinder (310), lower die 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 grating (600), protective cover (601); Detailed implementation mode

[0012] The present invention will be further described in detail below with reference to the accompanying drawings. Embodiment 1

[0013] As Figures 1 - 3 shown, an electric cylinder type intelligent fin forming machine includes a frame (100) and an upper die base plate (200), a lower die base plate (300) and a lower die slide plate (400) installed in the frame (100). They move up and down relatively along the guide rail (130) within the frame of the frame. The specific structure is as follows: 1. Electric cylinder drive system Clamping / mold opening mechanism: The upper die base plate (200) is installed on the upper frame (110) of the frame (100) through the upper die electric cylinder (210). The cylinder body of the upper die electric cylinder (210) is fixed to the upper frame (110), and the push rod is connected to the top of the upper die base plate (200) to drive the upper die base plate (200) to move downward along the vertical direction; The lower die base plate (300) is installed on the lower frame (120) of the frame (100) through the lower die electric cylinder (310). The cylinder body of the lower die electric cylinder (310) is fixed to the lower frame (120), and the push rod of the lower die electric cylinder is connected to the bottom of the lower die base plate (300) to drive the lower die base plate (300) to move upward along the vertical direction; The upper die base plate (200) and the lower die base plate (300) The guide rail (130) is installed on the side wall of the frame (100), and its sliders are respectively connected to the upper die base plate (200) and the lower die base plate (300) to control the precision of the guide rail (130) in controlling the up and down linear motion of the upper die base plate (200) and the lower die base plate (300).

[0014] Through the synchronous or asynchronous movement of the upper die electric cylinder (210) and the lower die electric cylinder (310), the precise clamping (relatively approaching) and rapid mold opening (relatively separating) of the upper die (201) and the lower die (301) are realized, thus replacing the mechanical unidirectional force transmission drive structure in traditional equipment, omitting the spring demolding device, and reducing energy consumption.

[0015] Bending and forming mechanism: As Figure 4As shown, a connecting seat (401) is provided at the bottom of the lower die slide plate (400), and a through groove for the connecting seat (401) to move is provided on the lower die base plate (300). An intermediate electric cylinder (410) is fixedly installed at the center position of the bottom of the lower die base plate (300). The push rod of the intermediate electric cylinder (410) extends in the horizontal direction (front-back direction) and is fixedly connected to the connecting seat (401) at the bottom of the lower die slide plate (400), driving the lower die slide plate (400) to slide back and forth on the table surface of the lower die base plate (300), realizing the horizontal displacement control of the bending process during the fin forming process.

[0016] 2. Intelligent control system The upper die electric cylinder (210), the lower die electric cylinder (310), and the intermediate electric cylinder (410) are all connected to the control system through servo drivers, and the control system is installed in a human-machine interface control box (500). The control system uses a PLC or an industrial computer, and can independently set the displacement stroke (accuracy ±0.05 mm), movement speed (adjustable from 0 to 200 mm / s), and acceleration curve (such as trapezoidal, S-shaped curve) of each electric cylinder, and realizes the precise control of the clamping pressure and bending angle through a multi-axis motion control algorithm. The cooperation relationship between its various parts is as Figure 6 shown.

[0017] 3. Quick die change system Die positioning structures are provided on the upper surfaces of the upper die base plate (200) and the lower die base plate (300), including: main positioning components: two conical positioning pins and positioning holes symmetrically distributed, with a conical surface fit tolerance of H7 / h6 to ensure quick alignment during die installation.

[0018] 4. Safety protection system Protection devices are provided on the front and rear sides of the frame (100). The protection devices include: a safety light curtain (600), installed at the front opening of the frame (100), consisting of a transmitting end and a receiving end, emitting an infrared beam to form a protection plane with a 150 mm spacing. When a person's limb enters the dangerous area, the control system (500) immediately triggers all electric cylinders to stop urgently, with a response time < 50 ms; a detachable protective cover (602): a metal frame structure covering the front and rear sides of the frame (100), with a surface combination of transparent acrylic plates and aluminum alloy profiles, reserving an openable observation window. A contact switch is provided at the rotating shaft of the protective cover (602), and the equipment cannot be started when the protective cover (602) is opened.

[0019] 5. Intelligent sensing system The control system (500) is connected to a sensor group to collect the data of the forming process in real time.

[0020] Displacement sensor (501): Magnetostrictive displacement sensor, installed at the connection between the push rod of each electric cylinder and its corresponding part, with a resolution of 0.01 mm, which real-time monitors the push rod stroke and feeds back to the control system; Pressure sensor (502): Resistance strain sensor, embedded in the contact surfaces between the upper die substrate (200) and the upper die (201), and between the lower die substrate (300) and the lower die (301), with a measuring range of 0 - 50 kN and an accuracy of ±0.5% FS, used to monitor the pressure value when the die is closed to prevent overload damage; Temperature sensor (503): K-type thermocouple, installed at the core part of the die (201 / 301) near the fin forming area (distance from the forming surface ≤ 5 mm), which real-time collects temperature data (measurement range -20°C ~ 400°C), and triggers an alarm when the temperature is abnormal (such as exceeding the temperature resistance threshold of the die material).

[0021] The frame (100) of the machine is made of a welded steel section frame, with adjustable feet at the bottom for horizontal calibration. Linear guides (150) are vertically arranged inside the frame. The upper die substrate (200) and the lower die substrate (300) are matched through the guides (150) to ensure the smoothness of vertical movement.

[0022] When the present invention is in use, the operator triggers the startup through the human-machine interface (500), and the control system automatically enters the active detection mode to detect the operating parameters of the upper die substrate (200) and the lower die substrate (300). After the detection is completed, the system automatically switches to the working state.

[0023] Taking the fin with a punching height of 20 mm and a width of 5 mm as an example: When the system is powered on and the equipment completes the system detection, the system switches to the working state. The upper electric cylinder (210) first descends to 20 mm according to the system instruction, that is, the punch of the upper die (201) punches the metal sheet downward by 20 mm, and the upper electric cylinder (210) stops moving. The lower electric cylinder (310) retracts downward by 20 mm, driving the lower die (301) to disengage. 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 5 mm to complete 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 and stops, the system instructs the lower electric cylinder (310) to move upward by 20 mm, that is, to realize the U-shaped bending of the metal sheet. After the upper folding of the metal sheet is completed, the lower electric cylinder (310) enters the stopped state, and the upper electric cylinder (210) retracts 20 mm to return to its position, disengaging the upper die (201). The upper electric cylinder (210) and the lower electric cylinder (310) both stop working, and the middle electric cylinder (410) pulls the middle slide plate (400) forward by 5 mm to complete the punching of the first fin. By repeating this cycle, the production and processing of the fins are completed.

[0024] When changing the mold, the operator triggers the "mold change mode" through the human-machine interface (500), and the control system controls the upper mold substrate (200) and the lower mold substrate (300) to open, so that the upper and lower molds are in a disengaged state. After removing the old mold, align the positioning holes of the new mold with the positioning pins on the substrate, and clamp and fix it in place after pushing it in place. At the same time, the QR code on the mold is recognized by the barcode scanner (504), and the control system automatically loads the forming parameters corresponding to the mold (such as the mold closing stroke, bending angle).

[0025] During equipment operation, the safety light curtain (601) monitors the operation area in real time. If someone accidentally touches the protected area, the power supply of the electric cylinder will be cut off immediately and braking will be performed; the sensor group uploads displacement, pressure, and temperature data to the control system in real time, and dynamically adjusts the motion parameters of the electric cylinder through the PID algorithm. For example, when the pressure sensor (502) detects that the mold closing pressure exceeds the set value, the feeding speed of the upper mold electric cylinder (210) is automatically reduced to avoid mold damage.

[0026] In summary, the present invention replaces the traditional mechanical cam with an electric cylinder drive, combines intelligent sensing and rapid mold change technology, significantly improves the accuracy, efficiency, and safety of fin forming, and is suitable for integrated applications in automated production lines.

[0027] Embodiment 2

[0028] As Figure 5 shown; in order to control the vertical movement of the upper and lower mold substrates, in this embodiment, guide pillars are used instead of guide rails (130) to provide guidance for the upper mold substrate (200) and the lower mold substrate (300).

[0029] To cooperate with the installation of the guide pillars, guide pillar holes are added at the relative positions of the upper mold substrate (200) and the lower mold substrate (300), so that the upper mold substrate (200) and the lower mold substrate (300) can be movably installed on the guide rails (130). Such a design makes the frame more stable, reduces movement friction, and improves vertical accuracy. At the same time, a return spring (140) can also be added to the guide pillars. The return spring (140) connected to the upper mold substrate (200) is a tension spring, while the return spring (140) connected to the lower mold substrate is a compression spring. The elastic force of the spring offsets part of the self-weight of the upper mold substrate (200) and the lower mold substrate (300), reducing the load on the electric cylinder. At the same time, it assists the upper and lower mold substrates to reset after stamping. Through guide pillar guidance + spring assistance, the operation stability of the equipment 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 intelligent fin forming machine, comprising a frame, an upper mold base plate and a lower mold base plate installed in the frame, and a lower mold slide plate installed on the lower mold base plate, guide rails are arranged 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 in the frame of the frame through the guide rails, and move relatively along the guide rails in the frame of the frame, characterized in that: The upper mold base plate is installed on the upper frame of the frame through the 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 installed on the lower frame of the frame through the lower mold electric cylinder, and the lower mold electric cylinder drives the lower mold base plate to move upward in the vertical direction to realize the mold closing and mold opening actions between the upper mold and the lower mold; An intermediate electric cylinder is arranged at the bottom of the lower mold base plate, and a push rod of the intermediate electric cylinder is connected to the lower mold slide plate to drive the lower mold slide plate to move in a horizontal direction (front and back direction) to complete the bending action during the fin forming process.

2. The electric cylinder type intelligent fin forming machine according to claim 1 is characterized in that The guide rails are guide posts, which are 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 posts through the guide post holes, and make relative movements along the guide posts within the frame of the frame. Reset springs are respectively mounted on the guide posts, and the upper mold base plate and the lower mold base plate are respectively connected to the upper frame and the lower frame of the frame by the reset springs. The upper mold base plate and the lower mold base plate are restricted to the middle part of the inner frame of the frame by the reset springs.

3. The electric cylinder type intelligent fin forming machine according to claim 1 is characterized in that: The upper die electric cylinder, the lower die electric cylinder and the middle electric cylinder are all connected to a control system, and 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 intelligent fin forming machine according to claim 1 or 2, characterized in that: The upper mold electric cylinder drives the upper mold base plate to move downward in the vertical direction, the lower mold electric cylinder drives the lower mold base plate to move upward in the vertical direction, and the stroke distance of the lower mold slide plate moving in the horizontal direction (front and back direction) can be adjusted according to the control program, and the adjustment range is 1-30mm.

5. The electric cylinder type intelligent fin forming machine according to claim 1, characterized in that: The frame is provided with a protective device, which includes a safety grating, a protective cover or other isolation structure, which is used to isolate the operator from the moving parts (such as the upper mold base plate, the lower mold slide plate, the electric cylinder push rod, etc.) when the equipment is running. The safety grating forms a protection area by emitting infrared light beams, and the collected data is input into the control system. When a person enters, the equipment is triggered to stop; the protective cover is a detachable metal or polymer plate structure, covering the outside of the moving parts of the frame.

6. The electric cylinder type intelligent fin forming machine according to claim 1, characterized in that: A QR code scanner is provided at the lower part of the upper mold substrate. When the equipment changes the mold, the QR code information on the mold is input into the control system through the scanner, and the control system automatically loads the molding parameters corresponding to the mold.

7. The electric cylinder type intelligent fin forming machine according to claim 2, characterized in that: The control system is connected to a sensor group, including: The displacement sensor is 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; The temperature sensor is installed in the key part of the mold close to the fin forming area to collect the forming temperature in real time; The sensor group feeds back data to the control system to achieve dynamic adjustment of molding parameters.

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