Temperature control device of cold stamping die and temperature control type cold stamping die

Abstract

The utility model relates to the technical field of cold stamping of automobile, more specifically, a kind of temperature control device and temperature control type cold stamping die of cold stamping die, temperature control device includes: temperature measuring device, the temperature measuring device is wireless temperature sensor with temperature sensing probe, and the temperature sensing probe of cold stamping die is used for real-time detection cold stamping die surface temperature;Cooling device, including vortex tube, solenoid valve and air outlet pipe, the air inlet of vortex tube is connected gas source by the solenoid valve, the cold side air outlet of vortex tube is connected the air outlet pipe, and the air outlet pipe is used to fixed-point blow cold air to cold stamping die;Control system, the wireless temperature sensor and the solenoid valve are respectively connected with the control system communication.The utility model can monitor the real-time temperature data of cold stamping die and automatically closed-loop control cooling cooling to cold stamping die, and can reduce cost, avoid increasing floor area.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive cold stamping, and more specifically, to a temperature control device for a cold stamping die and a temperature-controlled cold stamping die. Background Technology

[0002] During the drawing process, cold stamping dies are prone to defects such as cracking, hidden cracks, and wrinkling. These defects can lead to serious problems such as water leakage and insufficient strength in vehicles. Factors affecting the quality of drawing defects include: production parameter settings, press precision, die condition, material properties, and automation status. While most defects in cold stamping dies can be resolved through these improvements, for certain deep-drawing dies (such as side panels, rear partitions, door panels, and trunk partitions), conventional solutions are often insufficient to completely eliminate cracking. Furthermore, extensive production data shows that these defects typically occur in the later stages of production. Due to die heating, the die expands and contracts, reducing the clearance and hindering material flow during stamping, resulting in cracking in the parts.

[0003] To improve the problem of cracking and other defects in parts produced in the later stages of deep drawing die production, the industry typically uses fan or vortex tube cooling methods. However, both have limitations: when using fans for cooling, the die temperature data cannot be obtained in real time, making it impossible to accurately determine when to turn on the fan to cool the die; the cooling effect of fans is limited, and they occupy space and are inconvenient to use; although vortex tubes can achieve the required cooling, the inability to obtain the die temperature in real time makes it impossible to determine when to turn on the vortex tubes. If they are turned on for cooling for a long time, there will be a waste of energy, and in the later stages, excessive die cooling may cause wrinkling and other defects in the parts due to thermal expansion and contraction.

[0004] To obtain real-time surface temperature data during mold production and facilitate timely cooling, the industry currently employs two main methods for temperature measurement. One method involves using a handheld thermal imager to measure temperature during machine downtime; the other utilizes an infrared camera mounted on the machine tool for real-time temperature measurement with background data acquisition. However, both methods present production challenges: handheld thermal imager measurement requires production to be stopped, impacting efficiency, and each stop takes a considerable amount of time, allowing the mold to cool naturally, resulting in inaccurate measurements; installing infrared cameras on the press requires multiple cameras, necessitating extensive computation and demanding high-performance hardware such as cameras and processors, leading to significant investment costs. Furthermore, during mold stamping, the temperature cannot be obtained due to obstruction.

[0005] Existing technology discloses a temperature-controlled stamping die and method for high-strength steel plates. The die includes a high-strength steel plate, a cooling system, a temperature measuring system, and parallel upper and lower die modules. The upper and lower die modules close together to stamp the high-strength steel plate. An infrared thermal imager collects temperature data of the rounded corners at the end of the upper die module after each stamping operation and displays it on a computer. The cooling system uses air outlets on air pipes located around the die parting point to air-cool the upper die module, lower die module, and the formed high-strength steel plate according to temperature change data. This solution has high investment costs, and temperature cannot be obtained during production due to die obstruction. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a temperature control device for cold stamping dies and a temperature-controlled cold stamping die, which can monitor the temperature of the cold stamping die in real time, automatically control the cooling of the cold stamping die in a closed loop, and reduce costs.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A temperature control device for a cold stamping die is provided, comprising: A temperature measuring device, wherein the temperature measuring device is a wireless temperature sensor with a temperature sensing probe, and the temperature sensing probe installed on the cold stamping die is used to detect the surface temperature of the cold stamping die in real time. The cooling device includes a vortex tube, a solenoid valve, and an exhaust pipe. The air inlet of the vortex tube is connected to an external air source through the solenoid valve. The cold side air outlet of the vortex tube is connected to the exhaust pipe. The exhaust pipe is used to blow cold air onto the cold stamping die at a fixed point. The control system is configured to communicate with the wireless temperature sensor and the solenoid valve.

[0008] This invention relates to a temperature control device for cold stamping dies. During use, a temperature sensor probe monitors the die temperature at its installation location in real time, and the temperature sensor sends the temperature data to the control system. The control system compares the real-time monitored temperature data with a preset temperature range. When the monitored real-time temperature data is higher than the preset temperature range, and the press is in the open mold state, the control solenoid valve opens, and compressed air is introduced into the vortex tube through an air source. The high-speed airflow generates vortices within the vortex tube and separates into cold and hot airflows. The cold airflow flows out through the cold side outlet of the vortex tube and is blown onto the cold stamping die through the outlet pipe for cooling. When the monitored real-time temperature data is within the preset range, the current state is maintained. When the monitored real-time temperature data is lower than the preset temperature range, the control solenoid valve closes, and the vortex tube stops outputting cold air. This invention can monitor the real-time temperature data of cold stamping dies and automatically control the cooling of the cold stamping die in a closed loop, while also reducing costs.

[0009] Furthermore, the wireless temperature sensor includes a main frame, a lithium battery, a display screen, a temperature acquisition transmitter motherboard, an antenna, and the temperature sensing probe. The main frame is mounted on the cold stamping mold. The lithium battery and the temperature acquisition transmitter motherboard are located within the main frame. The display screen is located within the main frame. The temperature acquisition transmitter motherboard has a microcontroller and a wireless transmission module electrically connected to each other. The microcontroller and the display screen are electrically connected to the lithium battery. The temperature sensing probe is electrically connected to the microcontroller. The wireless transmission module is wirelessly connected to the control system. The antenna is movably connected to the wireless transmission module.

[0010] Furthermore, the control system includes a cloud database, a host computer, and a PLC controller. The wireless transmission module communicates wirelessly with the cloud database, the host computer communicates with the cloud database, the PLC controller communicates with the host computer, and the solenoid valve communicates with the PLC controller.

[0011] Furthermore, the cloud database includes a push module, which communicates with WeChat Work via the WeChat Work API interface.

[0012] Furthermore, the main frame is a plastic structure, and the main frame is provided with threaded holes, through which connectors are installed to mount the main frame onto the cold stamping die.

[0013] Furthermore, the detection range of the temperature sensing probe is... .

[0014] Furthermore, it also includes a support rib plate, which is disposed on the cold stamping die, and the vortex tube is installed on the support rib plate.

[0015] This invention also provides a temperature-controlled cold stamping die. During production, a temperature sensor probe monitors the die temperature at the installation location in real time, and the temperature measuring device sends the temperature data to the control system. The control system compares the real-time monitored temperature data with a preset temperature range. When the monitored real-time temperature data is higher than the preset temperature range, and the press is in the open state, the control solenoid valve opens, and the vortex tube receives compressed air through an air source. The high-speed airflow generates vortices within the vortex tube and separates into cold and hot airflows. The cold airflow flows out through the cold side outlet of the vortex tube and is blown onto the cold stamping die through the outlet pipe for cooling. When the monitored real-time temperature data is within the preset range, the current state is maintained. When the monitored real-time temperature data is lower than the preset temperature range, the control solenoid valve closes, and the vortex tube stops outputting cold airflow. In this invention, a temperature control device is designed and installed on the existing cold stamping die, which can monitor the real-time temperature data of the cold stamping die and automatically control the cooling of the cold stamping die in a closed loop, thereby reducing costs and avoiding increasing the floor space required.

[0016] The present invention relates to a temperature-controlled cold stamping die, comprising an upper die, a lower die, and a temperature control device for the aforementioned cold stamping die. The upper die and the lower die are closed to cold stamp and form parts. The temperature measuring device and the cooling device are installed on the upper die and / or the lower die.

[0017] Furthermore, the upper mold and / or lower mold are provided with blind holes for mounting the temperature sensing probe.

[0018] Furthermore, the depth of the blind hole is 2mm to 5mm.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: It can monitor the temperature of cold stamping dies in real time, automatically control the cooling of cold stamping dies in a closed loop, and reduce costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the temperature control device for the cold stamping die in an embodiment of this utility model; Figure 2 This is a schematic diagram of the temperature-controlled cold stamping die in an embodiment of this utility model; Figure 3 This is a schematic diagram of the vortex tube in an embodiment of the present invention.

[0021] In the attached diagram: 1-Wireless temperature sensor; 101-Temperature sensor probe; 2-Vortex tube; 201-Air inlet; 202-Cold side air outlet; 3-Outlet air pipe; 4-Solenoid valve; 5-Cloud database; 6-Host computer; 7-PLC controller; 8-Supporting rib; 9-Upper mold; 10-Lower mold; 11-Blind hole. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0023] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0024] Example 1 A temperature control device for a cold stamping die, such as Figures 1 to 3 As shown, it includes: a temperature measuring device, which is a wireless temperature sensor 1 with a temperature sensing probe 101, and the temperature sensing probe 101 installed on the cold stamping die is used to detect the surface temperature of the cold stamping die in real time; a cooling device, including a vortex tube 2, a solenoid valve 4 and an exhaust pipe 3, the air inlet 201 of the vortex tube 2 is connected to an external air source through the solenoid valve 4, the cold side air outlet 202 of the vortex tube 2 is connected to the exhaust pipe 3, and the exhaust pipe 3 is used to blow cold air to the cold stamping die at a fixed point; and a control system, in which the wireless temperature sensor 1 and the solenoid valve 4 are respectively connected to the control system for communication.

[0025] The aforementioned temperature control device for cold stamping dies monitors the die temperature at its installation location in real time via a temperature sensor probe 101. The temperature sensor sends the temperature data to the control system. The control system compares the real-time monitored temperature data with a preset temperature range. When the monitored real-time temperature data is higher than the preset temperature range, and the press is in the open mold state, the control solenoid valve 4 opens, and the vortex tube 2 receives compressed air through an air source. The high-speed airflow generates a vortex within the vortex tube 2 and separates into cold and hot airflows. The cold airflow flows out through the cold side outlet 202 of the vortex tube 2 and is blown onto the cold stamping die through the outlet pipe 3 for cooling. When the monitored real-time temperature data is within the preset range, the current state is maintained. When the monitored real-time temperature data is lower than the preset temperature range, the control solenoid valve 4 closes, and the vortex tube 2 stops outputting the cold airflow. This embodiment can monitor the real-time temperature data of the cold stamping die and automatically control the cooling of the cold stamping die in a closed loop, thus reducing costs.

[0026] A silencer is installed at the hot end outlet of the vortex tube 2 to reduce the noise generated by the hot exhaust.

[0027] The wireless temperature sensor 1 includes a main frame, a lithium battery, a display screen, a temperature acquisition transmitter motherboard, an antenna, and a temperature sensing probe 101. The main frame is mounted on a cold-stamping mold. The lithium battery and the temperature acquisition transmitter motherboard are located within the main frame. The display screen is located within the main frame. The temperature acquisition transmitter motherboard has a microcontroller and a wireless transmission module electrically connected. The microcontroller and the display screen are electrically connected to the lithium battery. The temperature sensing probe 101 is electrically connected to the microcontroller. The wireless transmission module is wirelessly connected to the control system. The antenna is movably connected to the wireless transmission module. Specifically, the temperature sensing probe 101 is a PT100 resistance temperature sensor, and the temperature detection range is [not specified in the original text]. The PT100 resistance temperature sensor probe 101 makes close contact with the surface of the mold being tested. While absorbing heat, its own resistance changes accordingly. The resistance signal is converted into a digital value that can be processed by the microcontroller via the temperature acquisition transmitter motherboard. The microcontroller then converts this digital signal into a temperature value. The microcontroller packages the processed temperature data into data frames conforming to a specific wireless protocol and sends them to the wireless transmission module. The wireless transmission module modulates the digital signal onto a specific radio wave frequency band for transmission. The antenna effectively converts the high-frequency current energy generated by the transmission module into electromagnetic wave energy and radiates it into space. The lithium battery provides independent power, eliminating the need for an external power cord and allowing for installation in different locations as needed. The display screen includes a battery level indicator and power indicator lights, facilitating timely replacement of the lithium battery by on-site personnel to maintain temperature monitoring.

[0028] The main frame is made of plastic and has threaded holes for mounting connectors to the cold stamping die. Specifically, the specifications of the main frame are as follows: The overall structure is lightweight.

[0029] like Figure 1 , Figure 2 As shown, it also includes a support rib plate 8, which is located on the cold stamping die, and the vortex tube 2 is installed on the support rib plate 8. The vortex tube 2 can be installed on the original cold stamping die, avoiding increasing the floor space.

[0030] like Figure 1 As shown, the control system includes a cloud database 5, a host computer 6, and a PLC controller 7. The wireless transmitter module communicates wirelessly with the cloud database 5, the host computer 6 is communicatively connected to the cloud database 5, the PLC controller 7 is communicatively connected to the host computer 6, and the solenoid valve 4 is communicatively connected to the PLC controller 7. In this embodiment, the wireless temperature sensor 1 directly reports temperature data to the cloud database 5. Cloud commands first reach the host computer 6, are verified and confirmed, and then sent by the host computer 6 to the PLC for execution, causing the solenoid valve 4 to open or close. Simultaneously, the PLC can transmit data to the cloud database 5 via the host computer 6.

[0031] Example 2 This embodiment is similar to Embodiment 1, except that the cloud database 5 includes a push module, which communicates with WeChat Work via the WeChat Work API interface. In this embodiment, data from the wireless temperature sensor 1, PLC status, and gas source status are all aggregated in the cloud database 5. By calling the WeChat Work API, information can be pushed to WeChat Work in real time, allowing personnel to monitor production status without going to the work site, significantly improving personnel efficiency. The push logic runs in the cloud; even if the local factory's network or the host computer 6 experiences a brief interruption, as long as data uploads resume, the cloud can still process unpush messages after the connection is restored.

[0032] The core task of the host computer 6 is to communicate stably and in real-time with the PLC controller 7 to ensure uninterrupted production. Running additional network requests on the host computer 6, such as calling the WeChat API, performing logical judgments, and managing message queues, will increase its CPU and network load, introducing unnecessary risks. It should be noted that, depending on the actual application scenario, such as in special environments where network connectivity to the cloud is unavailable, the push module can also be set up on the host computer 6.

[0033] Example 3 A temperature-controlled cold stamping die, such as Figure 1 , Figure 2 As shown, the device includes an upper mold 9, a lower mold 10, and a temperature control device for a cold stamping die according to Embodiment 1 or Embodiment 2. The upper mold 9 and the lower mold 10 are closed to cold stamp the part. A temperature measuring device and a cooling device are installed on the upper mold 9 and / or the lower mold 10.

[0034] In the aforementioned temperature-controlled cold stamping die, during production, the temperature sensor 101 monitors the die temperature at the installation location in real time, and the temperature measuring device sends the temperature data to the control system. The control system compares the real-time monitored temperature data with a preset temperature range. When the monitored real-time temperature data is higher than the preset temperature range, and the press is in the open state, the control solenoid valve 4 opens, and the vortex tube 2 receives compressed air through an air source. The high-speed airflow generates a vortex within the vortex tube 2 and separates into cold and hot airflows. The cold airflow flows out through the cold side outlet 202 of the vortex tube 2 and is blown onto the cold stamping die through the outlet pipe 3 for cooling. When the monitored real-time temperature data is within the preset range, the current state is maintained. When the monitored real-time temperature data is lower than the preset temperature range, the control solenoid valve 4 closes, and the vortex tube 2 stops outputting cold airflow. In this embodiment, a temperature control device is designed and installed on the existing cold stamping die, which can monitor the real-time temperature data of the cold stamping die and automatically control the cooling of the cold stamping die in a closed loop, thereby reducing costs and avoiding increasing the floor space.

[0035] like Figure 1 As shown, the upper die 9 and / or the lower die 10 are provided with blind holes 11 for mounting temperature sensing probes 101. Correspondingly, the support ribs 8 and the vortex tubes 2 on them are provided on the corresponding upper die 9 and / or lower die 10, so that the exhaust pipe 3 is always aligned with the temperature measuring position on the cold stamping die during press operation.

[0036] It should be noted that, depending on actual needs, multiple sets of temperature measuring devices and cooling devices can be installed in the upper die 9 or the lower die 10 respectively to cool down multiple temperature measuring positions on the cold stamping die, eliminating defects such as cracking or dark cracks in parts caused by increased die temperature in the later stages of deep drawing die production. Figure 2 As shown, the lower mold 10 is equipped with two sets of temperature measuring devices and cooling devices.

[0037] The depth of the blind hole 11 is 2mm~5mm, which improves the temperature measurement efficiency and accuracy of the temperature sensing probe 101.

[0038] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0039] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A temperature control device for a cold stamping die, characterized in that, include: Temperature measuring device, the temperature measuring device is a wireless temperature sensor (1) with a temperature sensing probe (101), the temperature sensing probe (101) installed on the cold stamping die is used to detect the surface temperature of the cold stamping die in real time. The cooling device includes a vortex tube (2), a solenoid valve (4) and an exhaust pipe (3). The air inlet (201) of the vortex tube (2) is connected to an external air source through the solenoid valve (4). The cold side air outlet (202) of the vortex tube (2) is connected to the exhaust pipe (3). The exhaust pipe (3) is used to blow cold air to the cold stamping die at a fixed point. The wireless temperature sensor (1) and the solenoid valve (4) are respectively connected to the control system in communication.

2. The temperature control device for cold stamping dies according to claim 1, characterized in that, The wireless temperature sensor (1) includes a main frame, a lithium battery, a display screen, a temperature acquisition transmitter motherboard, an antenna, and the temperature sensing probe (101). The main frame is mounted on a cold stamping mold. The lithium battery and the temperature acquisition transmitter motherboard are located inside the main frame. The display screen is located on the main frame. The temperature acquisition transmitter motherboard has a microcontroller and a wireless transmission module that are electrically connected. The microcontroller and the display screen are electrically connected to the lithium battery. The temperature sensing probe (101) is electrically connected to the microcontroller. The wireless transmission module is wirelessly connected to the control system. The antenna is movably connected to the wireless transmission module.

3. The temperature control device for cold stamping dies according to claim 2, characterized in that, The control system includes a cloud database (5), a host computer (6), and a PLC controller (7). The wireless transmission module communicates wirelessly with the cloud database (5), the host computer (6) communicates with the cloud database (5), the PLC controller (7) communicates with the host computer (6), and the solenoid valve (4) communicates with the PLC controller (7).

4. The temperature control device for cold stamping dies according to claim 3, characterized in that, The cloud database (5) includes a push module, which communicates with WeChat Work through the WeChat Work API interface.

5. The temperature control device for cold stamping dies according to claim 2, characterized in that, The main frame is made of plastic and has threaded holes. Connectors are installed in the threaded holes to mount the main frame onto the cold stamping die.

6. The temperature control device for cold stamping dies according to claim 1, characterized in that, The detection range of the temperature sensing probe (101) is .

7. The temperature control device for cold stamping dies according to claim 1, characterized in that, It also includes a support rib (8), which is disposed on the cold stamping die, and the vortex tube (2) is installed on the support rib (8).

8. A temperature-controlled cold stamping die, characterized in that, The device includes an upper die (9), a lower die (10), and a temperature control device for a cold stamping die according to any one of claims 1 to 7, wherein the upper die (9) and the lower die (10) are closed to cold stamp the part; the temperature measuring device and the cooling device are installed on the upper die (9) and / or the lower die (10).

9. The temperature-controlled cold stamping die according to claim 8, characterized in that, The upper mold (9) and / or the lower mold (10) are provided with blind holes (11) for mounting the temperature sensing probe (101).

10. The temperature-controlled cold stamping die according to claim 9, characterized in that, The depth of the blind hole (11) is 2mm~5mm.

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