Water cooling control system and temperature regulation and control method

Abstract

The invention belongs to the technical field of laser cutting, and discloses a water cooling control system and a temperature regulation and control method. The water cooling control system comprises a cutting head control unit, a cutting head constant temperature unit, an environment data acquisition module, a temperature acquisition module, a cooling water circulation unit and a water cooling machine control unit. According to the water cooling control system provided by the invention, the working condition of the cutting head and the external environment are monitored in real time through the cutting head control unit, the environmental data acquisition module and the temperature acquisition module, and then the cooling water circulation unit is controlled by the water cooling machine control unit to correspondingly adjust the temperature and flow of cooling water; therefore, the stable operation of the cutting head in various complex environments can be ensured.

Description

Technical Field

[0001] The present invention relates to the field of laser cutting technology, and in particular to a water cooling control system and a temperature control method. Background Art

[0002] Laser cutting machines are widely used in metal processing, aerospace, automobile manufacturing and other fields. The cutting head is the core component of the laser cutting machine, and its performance directly affects the cutting quality and efficiency. The cutting head generates a lot of heat during operation. If the heat cannot be dissipated in a timely and effective manner, the following problems may occur:

[0003] 1. Failure of optical components: Excessive temperature can cause deformation or damage to optical lenses, reflectors and other components, affecting the quality of the laser beam.

[0004] 2. Damage to electrical components: Electronic components are sensitive to temperature, and overheating may cause performance degradation or even burn out.

[0005] 3. Reduced cutting accuracy: Thermal expansion of the mechanical structure caused by temperature changes will affect the positioning accuracy of the cutting head.

[0006] 4. Shortened equipment life: Long-term overheating operation accelerates equipment aging and increases maintenance costs.

[0007] The existing cooling method of the cutting head mainly relies on a single water cooling structure, which has the following problems:

[0008] 1. Inaccurate temperature control: The cooling water temperature is fixed and cannot be adjusted according to actual needs, resulting in temperature fluctuations of the cutting head.

[0009] 2. Slow response speed: Unable to quickly respond to changes in the external environment and cutting head power, and low cooling efficiency.

[0010] 3. Lack of intelligent adjustment: It cannot be dynamically adjusted according to the working conditions of the cutting head and the external environment, resulting in overcooling or overheating.

[0011] 4. Poor environmental adaptability: The ambient temperature and humidity vary greatly in different regions, seasons, and times, and the existing water cooling structure is difficult to adapt.

[0012] Therefore, there is an urgent need for a water cooling control system that can monitor the working condition and external environment of the cutting head in real time and intelligently adjust the cooling water temperature and flow rate to ensure that the cutting head can operate stably in various complex environments. Summary of the invention

[0013] The purpose of the present invention is to provide a water cooling control system and a temperature control method to monitor the working condition and external environment of the cutting head in real time, and intelligently adjust the cooling water temperature and flow rate of the water cooling control system to ensure that the cutting head can operate stably in various complex environments.

[0014] To achieve this object, the present invention adopts the following technical solutions:

[0015] A water cooling control system for cooling a cutting head, the water cooling control system comprising a cutting head control unit, a cutting head thermostatic unit, an environmental data acquisition module, a temperature acquisition module, a cooling water circulation unit and a water chiller control unit;

[0016] The cutting head control unit is electrically connected to the cutting head, and the cutting head control unit is configured to control the operation of the cutting head and to collect working condition data of the cutting head;

[0017] The cutting head thermostatic unit is arranged on the cutting head, the water outlet and the water inlet of the cooling water circulation unit are connected to the cutting head thermostatic unit through pipelines, the cooling water circulation unit supplies circulating cooling water to the cutting head thermostatic unit, and the cutting head thermostatic unit exchanges heat with the cutting head through the cooling water supplied by the cooling water circulation unit, so as to cool the cutting head;

[0018] The environmental data acquisition module is configured to acquire external environmental data;

[0019] The temperature acquisition module is configured to acquire the temperature of the water inlet and the water outlet of the thermostatic unit of the cutting head, and is configured to acquire the temperature of the water inlet and the water outlet of the cooling water circulation unit;

[0020] The cutting head control unit, the cooling water circulation unit, and the environmental data acquisition module are all electrically connected to the water chiller control unit, and the water chiller control unit is configured to control the operation of the cooling water circulation unit so as to adjust the flow rate and temperature of the supplied cooling water accordingly.

[0021] Preferably, the water cooling control system further comprises a pressure sensor, and the pressure sensor is used for the pressure in each pipeline.

[0022] Preferably, the cutting head control unit includes a first processor, a first acquisition module and a communication interface, the first processor is electrically connected to the first acquisition module, the first processor and the first acquisition module are both arranged on the cutting head, and the first processor communicates with the water chiller control unit through the communication interface.

[0023] Preferably, the cutting head thermostatic unit comprises a cooling water channel and a heat exchanger, the cooling water channel is arranged on the cutting head, and the heat exchanger is attached to the cutting head and located in the middle of the cooling water channel.

[0024] Preferably, the cooling water circulation unit comprises:

[0025] Water storage tank, used to store cooling water;

[0026] A refrigeration module, used to cool the cooling water;

[0027] A heating module, used for heating cooling water;

[0028] A circulating water pump, used to extract cooling water from the water storage tank and transport the cooling water to the outside of the cooling water circulation unit;

[0029] The flow control valve is used to control the flow of cooling water supplied by the circulating water pump.

[0030] Preferably, the environmental data acquisition module includes at least one temperature and humidity sensor.

[0031] A temperature control method is provided, wherein the temperature of the cutting head is controlled by the water cooling control system. The temperature control method comprises the following steps:

[0032] Initial detection: collecting external environment data and the working condition data of the cutting head, and collecting the water inlet and outlet temperatures of the thermostatic unit of the cutting head, and the water inlet and outlet temperatures of the cooling water circulation unit;

[0033] Temperature difference judgment and preheating: comparing the water inlet temperature T_in of the thermostatic unit of the cutting head with the set temperature T_set, if T_in is lower than T_set and the difference is greater than the first threshold value ΔT1, controlling the cooling water circulation unit to preheat the cooling water;

[0034] Start cooling: after the preheating state ends or when preheating is not required, start the cooling water circulation unit to supply cooling water to the cutting head constant temperature unit and exchange heat with the cutting head;

[0035] Continuous monitoring: continuously collect and compare the deviation between T_in and T_set. If the deviation is greater than the second threshold ΔT2, or a significant change in the external environment data is detected, enter the step of "dynamic adjustment";

[0036] Dynamic adjustment: According to the real-time deviation between T_in and T_set and the temperature change rate (dT_in / dt), the cooling water circulation unit is controlled to adjust the temperature or flow of the cooling water so that T_in gradually approaches T_set;

[0037] Stable operation: If |T_in-T_set| does not exceed the predetermined range (δ), the current adjustment state is maintained and continuously monitored until the cutting operation is completed or the system is shut down.

[0038] Preferably, the step of "start cooling" and the step of "continuous monitoring" further include:

[0039] Real-time monitoring and prediction: Continuously collect and calculate the relationship between T_in and time to predict the time required to reach T_set.

[0040] Preferably, the steps of “real-time detection and prediction” and “continuous monitoring” further include:

[0041] Temperature compensation and adjustment: If there is still a deviation between T_in and T_set, the cooling water circulation unit is controlled to adjust the temperature or flow rate of the cooling water so that T_in is stabilized at T_set.

[0042] Preferably, the step of "dynamic adjustment" further includes:

[0043] Anti-condensation control: Calculate or query the dew point temperature T_dew based on the external environment data, and when T_in is lower than the sum of T_dew and the safety margin ΔD, control the cooling water circulation unit to increase the cooling water temperature or reduce the flow rate accordingly to avoid condensation.

[0044] Beneficial effects of the present invention:

[0045] First, the cooling water circulation unit is controlled by the water chiller control unit to adjust the flow rate and temperature of the cooling water supply accordingly, so that it can be adjusted according to actual needs, thereby reducing the temperature fluctuation of the cutting head.

[0046] Secondly, before cooling, the water inlet temperature of the cutting head thermostat unit is compared with the set temperature through the water cooler control unit. If the water inlet temperature of the cooling water circulation unit is lower than the set value, the water cooler control unit controls the cooling water circulation unit to preheat the cooling water, thereby being able to quickly respond to changes in ambient temperature and cutting head power, with high cooling efficiency.

[0047] Again, the external environmental data is continuously monitored through the environmental data acquisition module, the cutting head control unit continuously monitors the working condition data of the cutting head, and the temperature acquisition module continuously monitors the temperature of the water inlet and outlet of the constant temperature unit of the cutting head and the temperature of the water inlet and outlet of the cooling water circulation unit. If it is detected that the water inlet temperature of the constant temperature unit of the cutting head deviates from the set value, the water chiller control unit controls the cooling water circulation unit to adjust the temperature or flow of the cooling water accordingly, so that it can be dynamically adjusted according to the working condition of the cutting head and the external environment, thereby avoiding overcooling or overheating.

[0048] Finally, by continuously monitoring the external environmental data through the environmental data acquisition module, the water-cooling machine control unit can control the cooling water circulation unit to adjust the temperature and flow of the cooling water accordingly according to the environmental data, thereby improving the environmental adaptability of the water-cooling control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1It is a structural schematic diagram of the water cooling control system provided by the present invention;

[0050] Figure 2 The dew point temperature meter provided by the present invention; DETAILED DESCRIPTION

[0051] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0052] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0053] In the present application, the term "and / or" is a description of the association relationship of associated objects, indicating that three relationships may exist. For example, a centrifugal vortex magnetic pump and / or a centrifugal vortex magnetic pump can represent: the existence of a centrifugal vortex magnetic pump alone, the existence of a centrifugal vortex magnetic pump and a centrifugal vortex magnetic pump at the same time, and the existence of a centrifugal vortex magnetic pump alone. In addition, the character " / " in the present application generally indicates that the objects associated before and after are in an "and / or" relationship.

[0054] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0055] In the present application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, and the like. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0056] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0057] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0058] See also Figure 1 and Figure 2 The present embodiment provides a water cooling control system for cooling a cutting head. The water cooling control system includes a cutting head control unit, a cutting head constant temperature unit, an environmental data acquisition module, a temperature acquisition module, a cooling water circulation unit, and a water chiller control unit.

[0059] The cutting head control unit is electrically connected to the cutting head, and the cutting head control unit is configured to control the operation of the cutting head and to collect the working condition data of the cutting head. The cutting head thermostat unit is arranged on the cutting head, and the water outlet and water inlet of the cooling water circulation unit are connected to the cutting head thermostat unit through pipelines. The cooling water circulation unit supplies circulating cooling water to the cutting head thermostat unit, and the cutting head thermostat unit exchanges heat with the cutting head through the cooling water supplied by the cooling water circulation unit to cool the cutting head. The environmental data acquisition module is configured to collect external environmental data. The temperature acquisition module is configured to collect the temperature of the water inlet and water outlet of the cutting head thermostat unit, and is configured to collect the temperature of the water inlet and water outlet of the cooling water circulation unit. The cutting head control unit, the cooling water circulation unit, and the environmental data acquisition module are all electrically connected to the water chiller control unit, and the water chiller control unit is configured to control the operation of the cooling water circulation unit so that it can adjust the flow rate and temperature of the cooling water supply accordingly.

[0060] Correspondingly, this embodiment further provides a temperature control method, which controls the temperature of the cutting head through the above-mentioned water cooling control system. The temperature control method includes the following steps:

[0061] Initial detection: Collect external environment data and cutting head working condition data, and collect the temperature of the water inlet and outlet of the constant temperature unit of the cutting head, and the temperature of the water inlet and outlet of the cooling water circulation unit.

[0062] In the step "initial detection", the water chiller control unit first obtains the ambient temperature Ten and humidity RHenv, and records them together with the cutting head temperature Thead, power load Plaser and other data fed back by the cutting head control unit. At the same time, the temperature acquisition module transmits the temperature of the cutting head constant temperature unit water inlet T_in, water outlet T_out, cooling water circulation unit water inlet and outlet to the water chiller control unit. If it is detected that T_in is much lower than the set temperature T_set and the difference exceeds the first threshold value ΔT1, it is determined that preheating is required, and the water chiller control unit accordingly turns on the heating module to heat the cooling water.

[0063] Temperature difference judgment and preheating: compare the water inlet temperature T_in of the thermostatic unit of the cutting head with the set temperature T_set. If T_in is lower than T_set and the difference is greater than the first threshold ΔT1, control the cooling water circulation unit to preheat the cooling water.

[0064] Start cooling: After the preheating state is over or when preheating is not required, start the cooling water circulation unit to supply cooling water to the cutting head constant temperature unit and exchange heat with the cutting head.

[0065] When T_in is substantially close to T_set or reaches the temperature difference bandwidth set by the water chiller control unit (eg |T_in-T_set|≤ε_1), preheating is completed and the cooling water circulation unit starts normal circulation.

[0066] Continuous monitoring: Continuously collect and compare the deviation between T_in and T_set. If the deviation is greater than the second threshold ΔT2, or a significant change in the external environment data is detected, enter the step "dynamic adjustment".

[0067] At this time, the water-cooling machine control unit still continues to collect T_in and compares it in each sampling period (for example, once every second or several seconds). Once it is found that the deviation of T_in-T_set exceeds another threshold ΔT2, it immediately enters the dynamic adjustment mode.

[0068] Dynamic adjustment: According to the real-time deviation between T_in and T_set and the temperature change rate (dT_in / dt), the cooling water circulation unit is controlled to adjust the temperature or flow of the cooling water so that T_in gradually approaches T_set.

[0069] During the dynamic adjustment process, the water chiller control unit will make further calculations based on the difference between T_in and T_set and the temperature change rate (dT_in / dt). For example, when T_in is significantly higher than T_set and is still rising, it means that the heat dissipated by the cutting head continues to increase. At this time, the cooling power of the cooling water circulation unit can be increased and the flow rate of cooling water can be increased at the same time; if T_in is lower than T_set, the opposite operation is performed. In addition, to avoid temperature attenuation or sudden changes caused by long-distance pipelines, the system can make predictions based on the detected transmission delay and temporarily increase or decrease the target temperature to compensate when necessary.

[0070] It is worth noting that the cutting head must include multiple lenses to form optical components and various electrical components. If a large amount of condensed water is generated on the surface of the optical components or electrical components, it may affect the normal operation of the cutting head.

[0071] Correspondingly, in order to avoid the above situation, the dynamic adjustment also includes the control of anti-condensation.

[0072] Anti-condensation control: Calculate or query the dew point temperature T_dew based on the external environment data, and when T_in is lower than the sum of T_dew and the safety margin ΔD, control the cooling water circulation unit to increase the cooling water temperature or reduce the flow rate accordingly to avoid condensation.

[0073] When the external ambient temperature Ten and relative humidity RHen are detected, the dew point temperature Tdew is obtained by consulting the dew point temperature table. If T_in is lower than Tdew+ΔDT, there is a risk of condensation, and the water chiller control unit will actively raise the temperature of the cooling water or reduce the water flow rate to keep T_in higher than the dew point temperature safety margin, thereby preventing condensation on the surface of optical lenses and electrical components.

[0074] It should be noted that, under the premise of ensuring stable operation of the cutting head, as long as |T_in-T_set| does not exceed a certain tolerance δ (for example, 1°C) and no condensation risk is detected, the water chiller control unit will maintain the current heating / cooling power and flow rate unchanged to ensure that the system is relatively energy-efficient and reduce the impact of frequent start-stop on equipment life.

[0075] Stable operation: If |T_in-T_set| does not exceed the predetermined range (δ), the current adjustment state is maintained and continuously monitored until the cutting operation is completed or the system is shut down.

[0076] First, the cooling water circulation unit is controlled by the water chiller control unit to adjust the flow rate and temperature of the cooling water supply accordingly, so that it can be adjusted according to actual needs, thereby reducing the temperature fluctuation of the cutting head.

[0077] Secondly, before cooling, the water inlet temperature of the cutting head thermostat unit is compared with the set temperature through the water cooler control unit. If the water inlet temperature of the cooling water circulation unit is lower than the set value, the water cooler control unit controls the cooling water circulation unit to preheat the cooling water, thereby being able to quickly respond to changes in ambient temperature and cutting head power, with high cooling efficiency.

[0078] Again, the external environmental data is continuously monitored through the environmental data acquisition module, the cutting head control unit continuously monitors the working condition data of the cutting head, and the temperature acquisition module continuously monitors the temperature of the water inlet and outlet of the constant temperature unit of the cutting head and the temperature of the water inlet and outlet of the cooling water circulation unit. If it is detected that the water inlet temperature of the constant temperature unit of the cutting head deviates from the set value, the water chiller control unit controls the cooling water circulation unit to adjust the temperature or flow of the cooling water accordingly, so that it can be dynamically adjusted according to the working condition of the cutting head and the external environment, thereby avoiding overcooling or overheating.

[0079] Finally, by continuously monitoring the external environmental data through the environmental data acquisition module, the water-cooling machine control unit can control the cooling water circulation unit to adjust the temperature and flow of the cooling water accordingly according to the environmental data, thereby improving the environmental adaptability of the water-cooling control system.

[0080] Generally speaking, the cooling water circulation unit and the water chiller control unit are integrated on the water chiller, while the cutting head, cutting head control unit, cutting head thermostatic unit and environmental data acquisition module are all integrated on the laser cutting machine, resulting in the cooling water supplied by the cooling water circulation unit to the cutting head thermostatic unit passing through a longer pipe. Affected by this, the cooling water supplied by the cooling water circulation unit to the cutting head thermostatic unit will cool down during the transportation process, and thus cannot ensure that the temperature of the preheated cooling water is stable at the set value when it is delivered to the cutting head thermostatic unit.

[0081] Therefore, in order to ensure the preheating effect, the steps between the step "start cooling" and the step "continuous monitoring" also include:

[0082] Real-time monitoring and prediction: Continuously collect and calculate the relationship between T_in and time to predict the time required to reach T_set.

[0083] With this setting, it is possible to detect in real time the impact of factors such as the transportation distance and external environment on the cooling water temperature, and thus to predict the cooling water temperature's deviation from the set value just before it occurs or is about to occur. This prediction mechanism can respond quickly when the cooling water temperature rises or drops too quickly.

[0084] Correspondingly, in view of the gap that still exists between the current cooling water temperature and the set value, it is necessary to adjust the temperature and flow rate of the cooling water supplied by the cooling water circulation system.

[0085] Therefore, between the steps of “real-time detection and prediction” and “continuous monitoring”, there are also:

[0086] Temperature compensation and adjustment: If there is still a deviation between T_in and T_set, control the cooling water circulation unit to adjust the temperature or flow of the cooling water so that T_in is stable at T_set.

[0087] In addition, this embodiment also exemplarily provides a temperature control process, which includes seven steps T0-T7, wherein T0-T4 is a preheating process, and T5-T7 is a normal working process. Please refer to Table 1. The water inlet temperature in the table is the water inlet temperature of the cutting head thermostat unit, the water outlet temperature is the water outlet temperature of the cutting head thermostat unit, the water inlet pressure is the pressure of the water inlet of the cutting head thermostat unit, and the relative time is the water supply time of the cooling water circulation unit. The temperature control process is as follows:

[0088] T0, detect the water inlet temperature of the thermostatic unit of the cutting head (for example, 10°C), the pipeline pressure value (for example, 9800pa), and the relative humidity of the cutting head (for example, 50%), and record the data.

[0089] When the inlet temperature (eg, 10° C.) differs greatly from the set value (eg, 26° C.), the water chiller control unit controls the cooling water circulation unit to preheat the cooling water.

[0090] T1. The data are shown in the following table. At this time, the cooling water supplied by the cooling water circulation system is transported to the water inlet of the cutting head by the constant temperature unit for a circulation time of 44 seconds.

[0091] T2. The data are as shown in the table below. At this time, the relationship between the temperature and time of the cooling water supplied by the cooling water circulation system when it is transported to the water inlet of the cutting head by the constant temperature unit is about 0.1℃ / every 4 seconds. It is predicted that it will take about 610 seconds to reach 26℃.

[0092] T3, the data are as follows: After 655 seconds, the water inlet temperature of the cutting head is 24.49℃

[0093] T4, the data are as shown in the following table. After 700 seconds, the water inlet temperature is 24.4℃, which is 1.6℃ different from the system setting temperature. At this time, temperature compensation is started, and the water chiller control unit sends the required temperature of 26+1.6 / (24.4 / 26)=29.4℃ to the cooling water circulation unit to adjust the cooling water temperature to 29.4℃.

[0094] T5. The data are as shown in the following table. After 765 seconds, the outlet temperature is 26.2℃ and has reached the set value. After stabilizing at the set value for 20 seconds, the cutting head control unit controls the cutting head to start working.

[0095] T6. During operation, the temperature of the water inlet and outlet of the cutting head is continuously monitored and the dew point table is read. If it meets the dew point table, the water chiller control unit promptly controls the cooling water circulation unit to adjust the temperature so that it deviates from the dew point table.

[0096] T7. During operation, the temperature of the water inlet and outlet of the constant temperature unit of the cutting head is continuously monitored. If the temperature deviates by ±1°C, the water chiller control unit will promptly control the cooling water circulation unit to adjust the cooling water temperature accordingly.

[0097]

[0098] Table 1 Data change table

[0099] In particular, the water cooling control system also includes a pressure sensor, which is used to measure the pressure in each pipe, so as to ensure the stability of the water flow. It should be noted that the number and specific installation positions of the pressure sensors are designed according to the actual application scenario, so there is no specific restriction. In particular, a pressure sensor is required to detect whether the cutting head is blocked by the water inlet of the thermostatic unit.

[0100] Specifically, the cutting head control unit includes a first processor, a first acquisition module and a communication interface. The first processor is electrically connected to the first acquisition module. The first processor and the first acquisition module are both arranged on the cutting head, and the first processor communicates with the water-cooling machine control unit through the communication interface. In the present embodiment, the first processor is preferably an embedded processor, so that the structure of the cutting head can be made more compact. In addition, the first acquisition module includes detection components such as water temperature and water pressure sensors and humidity sensors to detect parameters such as temperature, pressure, and humidity of the cutting head. The specific structure of the first acquisition module is not subject to specific requirements and restrictions. It should be noted that the working principles of the first processor, the second acquisition module and the communication interface are all prior art. The present embodiment does not make any improvements to the first processor, the second acquisition module and the communication interface itself, so it will not be repeated. It should also be noted that the structure of the water-cooling machine control unit is similar to that of the cutting head control unit, and will not be described in detail.

[0101] The constant temperature unit of the cutting head includes a cooling water channel and a heat exchanger. The cooling water channel is arranged on the cutting head, and the heat exchanger is attached to the cutting head and located in the middle of the cooling water channel. It can be understood that attaching the heat exchanger to the cutting head can better exchange heat with the cutting head through the cooling water flowing through the heat exchanger, that is, it can better cool the cutting head. It should be noted that the cooling water channel is arranged according to the actual application scenario, and there is no specific limitation on this.

[0102] Preferably, the cooling water circulation unit includes a water tank, a refrigeration module, a heating module and a circulating water pump. The water tank is used to store cooling water. The refrigeration module is used to cool the cooling water. The heating module is used to heat the cooling water. The circulating water pump is used to extract the cooling water in the water tank and transport the cooling water to the outside of the cooling water circulation unit. The flow control valve is used to control the flow of cooling water supplied by the circulating water pump. It should be noted that the working principles of the refrigeration module, the heating module and the circulating water pump are all existing technologies, so they are not described in detail.

[0103] When in use, the circulating water pump starts working, draws cooling water from the water tank, and transports it to the cutting head through a pipe to the constant temperature unit. During this process, the cooling water absorbs the heat of the cutting head, and after the temperature rises, it flows back to the water tank through the pipe. Then the refrigeration module dissipates the heat of the cooling water, thus forming a cycle to supply circulating cooling water. Among them, the heating module can be controlled to open by the water chiller control unit according to the actual use scenario to heat the cooling water. In addition, the flow control valve can control the flow of cooling water supplied by the circulating water pump according to the actual use scenario.

[0104] The environmental data acquisition module includes at least one temperature and humidity sensor (not shown in the figure). Combined with the actual application scenario, the temperature and humidity sensor is preferably set on the shell of the laser cutting machine and avoids the cutting head to ensure the accuracy of the detection data. It should be noted that the specific model of the temperature and humidity sensor is selected according to the actual application scenario, and there is no specific restriction on this.

[0105] In this embodiment, the temperature acquisition module includes a plurality of water temperature sensors, wherein the water inlet and the water outlet of the thermostatic unit of the cutting head are each provided with a water temperature sensor, and the water inlet and the water outlet of the cooling water circulation unit are also provided with a water temperature sensor (not shown in the figure). In addition, key components of the cutting head may also be provided with water temperature sensors, such as optical components and electrical components, which will not be described in detail.

[0106] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A water cooling control system for cooling a cutting head, characterized in that: The water cooling control system includes a cutting head control unit, a cutting head constant temperature unit, an environmental data acquisition module, a temperature acquisition module, a cooling water circulation unit and a water cooling machine control unit; The cutting head control unit is electrically connected to the cutting head, and the cutting head control unit is configured to control the operation of the cutting head and to collect working condition data of the cutting head; The cutting head thermostatic unit is arranged on the cutting head, the water outlet and the water inlet of the cooling water circulation unit are connected to the cutting head thermostatic unit through pipelines, the cooling water circulation unit supplies circulating cooling water to the cutting head thermostatic unit, and the cutting head thermostatic unit exchanges heat with the cutting head through the cooling water supplied by the cooling water circulation unit, so as to cool the cutting head; The environmental data acquisition module is configured to acquire external environmental data; The temperature acquisition module is configured to acquire the temperature of the water inlet and the water outlet of the thermostatic unit of the cutting head, and is configured to acquire the temperature of the water inlet and the water outlet of the cooling water circulation unit; The cutting head control unit, the cooling water circulation unit, and the environmental data acquisition module are all electrically connected to the water chiller control unit, and the water chiller control unit is configured to control the operation of the cooling water circulation unit so as to adjust the flow rate and temperature of the supplied cooling water accordingly.

2. A water cooling control system according to claim 1, characterized in that: The water cooling control system further comprises a pressure sensor, and the pressure sensor is used for the pressure in each pipeline.

3. A water cooling control system according to claim 1, characterized in that: The cutting head control unit includes a first processor, a first acquisition module and a communication interface. The first processor is electrically connected to the first acquisition module. The first processor and the first acquisition module are both arranged on the cutting head. The first processor communicates with the water chiller control unit through the communication interface.

4. A water cooling control system according to claim 1, characterized in that: The cutting head constant temperature unit comprises a cooling water channel and a heat exchanger. The cooling water channel is arranged on the cutting head. The heat exchanger is attached to the cutting head and is located in the middle of the cooling water channel.

5. A water cooling control system according to claim 1, characterized in that: The cooling water circulation unit comprises: Water storage tank, used to store cooling water; A refrigeration module, used to cool the cooling water; A heating module, used for heating cooling water; A circulating water pump, used to extract cooling water from the water storage tank and transport the cooling water to the outside of the cooling water circulation unit; The flow control valve is used to control the flow of cooling water supplied by the circulating water pump.

6. A water cooling control system according to claim 1, characterized in that: The environmental data acquisition module includes at least one temperature and humidity sensor.

7. A temperature control method, wherein the temperature of a cutting head is controlled by a water cooling control system according to any one of claims 1 to 6, characterized in that: The temperature control method comprises the following steps: Initial detection: collecting external environment data and the working condition data of the cutting head, and collecting the water inlet and outlet temperatures of the thermostatic unit of the cutting head, and the water inlet and outlet temperatures of the cooling water circulation unit; Temperature difference judgment and preheating: comparing the water inlet temperature T_in of the thermostatic unit of the cutting head with the set temperature T_set, if T_in is lower than T_set and the difference is greater than the first threshold value ΔT1, controlling the cooling water circulation unit to preheat the cooling water; Start cooling: after the preheating state ends or when preheating is not required, start the cooling water circulation unit to supply cooling water to the cutting head constant temperature unit and exchange heat with the cutting head; Continuous monitoring: continuously collect and compare the deviation between T_in and T_set. If the deviation is greater than the second threshold ΔT2, or a significant change in the external environment data is detected, enter the step "dynamic adjustment"; Dynamic adjustment: According to the real-time deviation between T_in and T_set and the temperature change rate (dT_in / dt), the cooling water circulation unit is controlled to adjust the temperature or flow of the cooling water so that T_in gradually approaches T_set; Stable operation: If |T_in-T_set| does not exceed the predetermined range (δ), the current adjustment state is maintained and continuously monitored until the cutting operation is completed or the system is shut down.

8. A temperature control method according to claim 7, characterized in that: The steps between "start cooling" and "continue monitoring" also include: Real-time monitoring and prediction: Continuously collect and calculate the relationship between T_in and time to predict the time required to reach T_set.

9. A temperature control method according to claim 8, characterized in that: The steps between "real-time detection and prediction" and "continuous monitoring" also include: Temperature compensation and adjustment: If there is still a deviation between T_in and T_set, the cooling water circulation unit is controlled to adjust the temperature or flow rate of the cooling water so that T_in is stabilized at T_set.

10. A temperature control method according to claim 7, characterized in that: The step "dynamic adjustment" also includes: Anti-condensation control: Calculate or query the dew point temperature T_dew based on the external environment data, and when T_in is lower than the sum of T_dew and the safety margin ΔD, control the cooling water circulation unit to increase the cooling water temperature or reduce the flow rate accordingly to avoid condensation.

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