CN-121973500-A - Intelligent lubrication cooperative control system for heat balance of servo press

CN121973500ACN 121973500 ACN121973500 ACN 121973500ACN-121973500-A

Abstract

The application relates to the technical field of servo press control and thermal management, in particular to an intelligent lubrication cooperative control system for servo press thermal balance, which comprises a temperature sensing network, a multichannel temperature control lubrication module, a dynamic heat source tracking module, a channel activation and compensation module and a cooperative control module, wherein the temperature sensing network is used for collecting temperature field data in real time and generating a two-dimensional temperature distribution cloud picture, the multichannel temperature control lubrication module comprises a plurality of independently controlled lubrication channels, the dynamic heat source tracking module is used for identifying the central position of a heat source and the diffusion trend thereof through a heat source identification algorithm and predicting the hot spot position at the next moment based on a heat network model, the channel activation and compensation module is used for dynamically activating the lubrication channels and calculating the thermal interference compensation quantity of adjacent related channels to obtain channel activation compensation information, and the cooperative control module is used for generating control instructions of each activation channel in real time through a multi-target optimal control model and adjusting the oil supply quantity, the oil supply pressure, the oil supply temperature and the injection time sequence of each channel. Therefore, the problems of lack of dynamic response, rough hysteresis of a control strategy, thermal coupling interference and the like in the prior art are solved.

Inventors

MEI BIZHOU
PAN QIQIN
ZHANG ZHAOHUA
GUO HONGCHANG
MA TIANYE
Zou Fengdong
GUO ZHENGXI
XUE DONGDONG
GU ZHIBO
Xiao Guanyuan
HE GUOWEI
Zhou Keda
XIA ZHIJIE
WANG HAO

Assignees

浙江易锻精密机械有限公司

Dates

Publication Date: 20260505
Application Date: 20260409

Claims (10)

1. An intelligent lubrication cooperative control system for heat balance of a servo press is characterized by comprising a temperature sensing network, a multichannel temperature control lubrication module, a dynamic heat source tracking module, a channel activation and compensation module and a cooperative control module, wherein, The temperature sensing network is used for arranging a flexible film thermosensitive array on the surface of the key moving part to collect temperature field data in real time and generate a two-dimensional temperature distribution cloud picture; the multichannel temperature control lubrication module comprises a plurality of independently controlled lubrication channels, each lubrication channel corresponds to one or more key lubrication parts of the servo press, and each lubrication channel is independently provided with a flow regulating device, a pressure regulating device, a temperature regulating device and a state monitoring device; The dynamic heat source tracking module is used for identifying the central position of the heat source and the diffusion trend thereof in real time through a heat source identification algorithm based on the two-dimensional temperature distribution cloud image, and predicting the hot spot position at the next moment based on a heat network model; the channel activation and compensation module is used for dynamically activating one or more lubrication channels according to the central position of the heat source and the hot spot prediction result, automatically calculating the thermal interference compensation quantity of adjacent associated channels according to a preset inter-channel thermal coupling matrix, and obtaining channel activation compensation information; The cooperative control module is used for generating control instructions of all the activation channels in real time through the multi-target optimal control model, adjusting oil supply quantity, oil supply pressure, oil supply temperature and injection time sequence of all the channels, and realizing dynamic tracking and zonal cooperative temperature control lubrication of a heat source of the servo press.
2. The intelligent lubrication cooperative control system for servo press heat balance according to claim 1, wherein the temperature sensing network comprises a sensor layout unit, a temperature acquisition unit and a cloud image generation unit, wherein, The sensor layout unit is used for adopting a flexible film thermal sensor, and carrying out non-uniform density layout aiming at a stress deformation track of a servo press part and a friction hot spot high-emission area to form a flexible film thermal array; the temperature acquisition unit is used for acquiring temperature data of each sensing node in the flexible film thermosensitive array in real time, and carrying out pretreatment of filtering denoising and dead point elimination on the temperature data to obtain discrete temperature field data; The cloud image generation unit is used for reconstructing the global temperature distribution of the surface of the component through an interpolation fitting algorithm according to the temperature field data and the actual layout coordinates of the sensing points to generate a two-dimensional temperature distribution cloud image.
3. The intelligent lubrication cooperative control system for servo press heat balance according to claim 1, wherein the multi-channel temperature control lubrication module comprises a channel dividing unit, a three-dimensional degree regulating unit, a micro-injection executing unit and a state monitoring unit, wherein, The channel dividing unit is used for dividing a lubrication area into a plurality of independently controlled lubrication channels according to the types, the spatial positions and the thermal characteristic differences of key lubrication parts of the servo press, distributing unique channel identifiers for each lubrication channel, and enabling each channel to correspond to one or more adjacent key lubrication parts; The three-dimensional regulating unit comprises a flow regulating device, a pressure regulating device and a temperature regulating device which are arranged on each lubrication channel, wherein the flow regulating device is a miniature gear pump and is used for realizing accurate control of oil supply; The micro-injection execution unit comprises an electromagnetic micro-injection valve arranged at the tail end of each lubrication channel, and is used for controlling the injection time, the injection duration and the injection area of lubricating oil; The state monitoring unit is used for collecting the actual oil supply flow, the oil supply pressure and the oil supply temperature of each channel in real time and feeding back collected data to the cooperative control module in real time.
4. The intelligent lubrication cooperative control system for servo press heat balance according to claim 1, wherein the dynamic heat source tracking module comprises a heat source identification unit, a heat diffusion analysis unit, a hot spot prediction unit, wherein, The heat source identification unit is used for carrying out gradient analysis and local extremum searching on the two-dimensional temperature distribution cloud image, identifying the heat source center position in the temperature field and the temperature peak value of each heat source center, and marking the boundary of the heat source area; the thermal diffusion analysis unit is used for tracking a thermal diffusion path along the descending direction of the temperature gradient by taking the central position of the heat source as a starting point, calculating the diffusion direction and the diffusion rate of each heat source center, and generating a heat source diffusion trend field; And the hot spot prediction unit is used for calling a preset thermal network model to perform forward iterative operation according to the central position of the heat source and the heat source diffusion trend field so as to predict the hot spot position in the next control period.
5. The intelligent lubrication cooperative control system for servo press heat balance of claim 4, wherein the thermal network model comprises: Dispersing the prediction target area into a plurality of nodes according to the spatial positions of the key lubrication parts, wherein the positions of the nodes correspond to the spatial distribution of the multiple lubrication channels; the nodes are connected through thermal resistance, thermal resistance parameters for connecting any two adjacent nodes are defined and calibrated, and meanwhile, a thermal capacity parameter representing the local thermal inertia of each node is endowed to each node, and the thermal resistance parameters are calibrated in advance according to the thermal conductivity, the geometric dimension and the contact thermal resistance of the component material; The heat source centers are input as heat source sources, the heat flux density is dynamically calculated according to the temperature peak value and the heat source area, and based on the law of conservation of energy, a node temperature state equation is established, wherein the equation formula is as follows: ; Wherein, C is a heat capacity matrix which is a diagonal matrix taking heat capacity parameters as diagonal elements; is a node temperature vector; A is a heat conduction matrix, which is a symmetric matrix formed by the inverse of a heat resistance parameter, wherein off-diagonal elements are positive numbers, which represent heat conduction between a node i and a node j, and diagonal elements are negative numbers, so that energy conservation is ensured; inputting a vector for a heat flow source; Carrying out numerical solution on the node temperature state equation by adopting a forward Euler method, and iteratively calculating the temperature value of each node at the next moment; And identifying a temperature maximum point as a predicted hot spot position according to the calculated node temperature distribution.
6. The intelligent lubrication cooperative control system for servo press heat balance according to claim 1, wherein the channel activation and compensation module comprises an activation decision unit, a thermal coupling compensation calculation unit, a compensation integration unit, wherein, The activation decision unit is used for screening one or more lubrication channels corresponding to the spatial position of the heat source area as channels to be activated according to the current heat source central position and the predicted hot spot position at the next moment, and generating a channel activation instruction; The thermal coupling compensation calculation unit is used for inquiring the thermal coupling coefficients of adjacent non-activated channels from a preset thermal coupling matrix according to the channel activation instruction, and calculating and obtaining the thermal interference compensation quantity of adjacent associated channels by combining the spatial adjacent relation and the thermal conduction path of each channel; the compensation integration unit is used for integrating the channel activation instruction of the activated lubrication channel and the thermal interference compensation quantity of the adjacent associated channels to generate complete standardized channel activation compensation information.
7. The intelligent lubrication cooperative control system for servo press heat balance according to claim 1, wherein the cooperative control module comprises a multi-objective optimizing unit, an instruction synthesizing unit, wherein, The multi-objective optimization unit is used for acquiring channel activation compensation information and heat source center temperature, taking minimization of heat source region temperature deviation and target temperature deviation, minimization of lubricating oil consumption and minimization of oil supply temperature fluctuation of each lubricating channel as optimization targets, setting constraint conditions of a multi-objective optimization control model, solving under the constraint conditions to obtain a pareto optimal solution set, and selecting an optimal solution from the pareto optimal solution set as an optimal control parameter; The instruction synthesis unit is used for converting the optimal control parameters into specific control instructions of the independent lubrication channels and issuing the instructions to the independent lubrication channels for execution.
8. An intelligent lubrication cooperative control method for heat balance of a servo press is characterized by comprising the following steps: Arranging a flexible film thermosensitive array on the surface of a key moving part to acquire temperature field data in real time and generate a two-dimensional temperature distribution cloud picture; Constructing a plurality of independently controlled lubrication channels, wherein each lubrication channel corresponds to one or more key lubrication components of the servo press, and each lubrication channel is independently provided with a flow regulating device, a pressure regulating device, a temperature regulating device and a state monitoring device; Based on the two-dimensional temperature distribution cloud picture, recognizing the central position of the heat source and the diffusion trend thereof in real time through a heat source recognition algorithm, and predicting the hot spot position at the next moment based on a heat network model; dynamically activating one or more lubrication channels according to the central position of a heat source and a hot spot prediction result, and automatically calculating the thermal interference compensation quantity of adjacent associated channels according to a preset inter-channel thermal coupling matrix to obtain channel activation compensation information; And a control instruction of each activation channel is generated in real time through a multi-target optimal control model, and the oil supply quantity, the oil supply pressure, the oil supply temperature and the injection time sequence of each channel are regulated, so that the dynamic tracking and the zoning collaborative temperature control lubrication of the heat source of the servo press are realized.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement an intelligent lubrication cooperative control method for thermal balancing of a servo press as claimed in claim 8.
10. A computer program product comprising a computer program or instructions which, when executed, implements an intelligent lubrication cooperative control method for servo press heat balance as claimed in claim 8.

Description

Intelligent lubrication cooperative control system for heat balance of servo press Technical Field The application relates to the technical field of servo press control and thermal management, in particular to an intelligent lubrication cooperative control system for servo press thermal balance. Background The existing servo press has the advantages of high precision, programmability, energy saving and the like, but under the condition of long-time continuous working, key components such as a transmission system, a crankshaft, a sliding block and the like generate remarkable temperature rise due to uneven friction heat generation and cooling, so that thermal deformation is caused. The thermal deformation causes drift of the bottom dead center position, so that the formed thickness deviation of the workpiece can reach 8%, and the machining precision and consistency are seriously affected. In the prior art, two lubrication control modes are mainly adopted, namely a first timing and quantitative lubrication mode, namely oil is supplied to each lubrication point according to a preset time interval and oil supply quantity. The mode is simple in structure and low in cost, but the oil supply strategy cannot be dynamically adjusted according to the actual working condition change, excessive waste of lubricating oil is easily caused under the low-speed light-load working condition, the heat dissipation requirement is difficult to meet under the high-speed heavy-load working condition, and the temperature rise is out of control. And the second mode is a temperature feedback lubrication mode, wherein discrete temperature sensors are arranged at each lubrication point, and when the detected temperature exceeds a set threshold value, the PLC controller improves the oil supply flow of the corresponding lubrication branch. Compared with timing and quantitative lubrication, the method has the advantages that the method is improved, but the problems of insufficient perception, rough delay of a control strategy and thermal coupling interference during multi-channel parallel lubrication still exist, and the method lacks a dynamic response and multivariable cooperative regulation and control mechanism and cannot effectively inhibit thermal drift. Disclosure of Invention The application provides an intelligent lubrication cooperative control system for heat balance of a servo press, which aims to solve the problems of lack of dynamic response, rough hysteresis of a control strategy, thermal coupling interference and the like in the prior art. The embodiment of the first aspect of the application provides an intelligent lubrication cooperative control system for heat balance of a servo press, which comprises a temperature sensing network, a multichannel temperature control lubrication module, a dynamic heat source tracking module, a channel activating and compensating module and a cooperative control module, wherein the temperature sensing network is used for arranging a flexible film thermosensitive array on the surface of a key moving part to collect temperature field data in real time and generate a two-dimensional temperature distribution cloud picture, the multichannel temperature control lubrication module comprises a plurality of independently controlled lubrication channels, each lubrication channel corresponds to one or more key lubrication parts of the servo press, each lubrication channel is independently provided with a flow regulating device, a pressure regulating device, a temperature regulating device and a state monitoring device, the dynamic heat source tracking module is used for identifying the central position of a heat source and the diffusion trend thereof in real time based on the two-dimensional temperature distribution cloud picture through a heat source identification algorithm and predicting the hot spot position at the next moment based on a heat network model, the channel activating and compensating module is used for dynamically activating one or more lubrication channels according to the central position of the heat source and the hot spot predicting result, automatically calculating the heat interference compensation quantity of the adjacent channels according to a preset inter-channel thermal coupling matrix, and obtaining the activation compensation quantity of the adjacent channels, and the channel is used for realizing the cooperative control of the temperature control module, the oil supply and the dynamic heat source tracking module is used for realizing the cooperative control of the temperature control module and the pressure control by spraying the temperature control module. The temperature sensing network comprises a sensor layout unit, a temperature acquisition unit and a cloud image generation unit, wherein the sensor layout unit is used for adopting a flexible film heat-sensitive sensor to perform non-uniform density layout on a stress deformation track and a friction hot spot high-e