Roller automatic assembly production line control method, system, device and storage medium

Abstract

The application discloses a kind of roller automatic assembly production line control method, system, equipment and storage medium, belong to industrial production control technical field.The present application obtains wheel carrier temperature data and roller temperature data, determines press mounting mode data and press mounting termination displacement data according to the wheel carrier temperature data, and determines riveting pressure data according to the roller temperature data, controls servo press mounting equipment to execute roller press mounting according to the press mounting mode data, the press mounting termination displacement data and the riveting pressure data, and realizes the beneficial effect of improving the production stability of roller.

Description

Technical Field

[0001] This invention relates to the field of industrial production control technology, and in particular to a control method, system, equipment and storage medium for an automatic roller assembly line. Background Technology

[0002] Rollers are widely used moving parts in furniture and luggage products. A common double-wheel caster structure consists of a central plastic wheel frame, a metal pin, and two plastic rollers on the left and right. On automated production lines, roller assembly typically uses servo press-fitting equipment to press the metal pin into the combination of the wheel frame and rollers. The pin end is then expanded and fixed by spin riveting or stamping flanging to form a complete product. Current production lines generally use fixed press-fitting parameters, meaning that the press head always performs press-fitting at a constant speed and pressure, regardless of the current temperature of the plastic part. The flanging stage is also performed with a fixed pressure, resulting in unstable assembly quality due to fluctuations in material temperature, high scrap rate, and difficulty in adapting to mixed material production modes.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main objective of this invention is to provide a control method, system, equipment, and storage medium for an automated roller assembly production line, aiming to improve the production stability of rollers.

[0005] To achieve the above objectives, the present invention provides a control method for an automated roller assembly line, the method comprising the following steps: Acquire wheel frame temperature data and roller temperature data; The pressing mode data and pressing termination displacement data are determined based on the wheel frame temperature data, and the riveting pressure data is determined based on the roller temperature data. The servo press-fitting device is controlled to perform roller press-fitting based on the press-fitting mode data, the press-fitting termination displacement data, and the riveting pressure data.

[0006] Optionally, the step of determining the pressing mode data based on the wheel frame temperature data includes: When the wheel frame temperature data is greater than the preset high temperature threshold, the pressing mode data is determined to be the high-speed low-pressure slide-in mode. The pressing head running speed corresponding to the high-speed low-pressure slide-in mode is greater than the preset standard speed and the pressing head output pressure is less than the preset standard pressure. When the wheel frame temperature data is less than the preset low temperature threshold, the pressing mode data is determined to be the pulse micro-vibration pressing mode. The pressing head corresponding to the pulse micro-vibration pressing mode is pushed forward by reciprocating vibration with a preset vibration frequency and a preset small amplitude. When the wheel frame temperature data is within the preset normal temperature range, the pressing mode data is determined to be the standard constant speed pressing mode.

[0007] Optionally, the step of determining the press-fit termination displacement data based on the wheel frame temperature data includes: Based on the wheel frame temperature data, a preset thermal shrinkage displacement correction table is consulted to determine the cooling shrinkage compensation amount corresponding to the wheel frame temperature data; Calculate the press-fit termination target position based on the target axial clearance value and the cooling shrinkage compensation amount; The press-fit termination target position is used as the press-fit termination displacement data, wherein the press-fit termination displacement data is used to compensate for the axial dimensional shrinkage after the wheel frame is cooled.

[0008] Optionally, the step of determining the riveting pressure data based on the roller temperature data includes: The reference riveting pressure value is determined based on the roller temperature data; During the riveting stage, the pressing force displacement curve data is collected in real time, and the current curve slope is calculated based on the pressing force displacement curve data. Determine whether the slope of the current curve is less than a preset slope threshold; When the slope of the current curve is less than the preset slope threshold, the flexible unloading pressure value is determined according to the reference riveting pressure value, and the flexible unloading pressure value is used as the riveting pressure data, wherein the flexible unloading pressure value is less than the reference riveting pressure value.

[0009] Optionally, the step of controlling the servo pressing device to perform roller pressing based on the pressing mode data, the pressing termination displacement data, and the riveting pressure data includes: The servo press-fitting device is controlled to press the metal pin into the center wheel frame and the two side rollers according to the press-fitting mode data; When the pressure head of the servo pressing device reaches the position corresponding to the pressing termination displacement data, the pressure head is controlled to stop pressing down; During the riveting stage, the pressure head is controlled to perform spin riveting or stamping and flanging on the end of the metal pin according to the riveting pressure data.

[0010] Optionally, before the control servo pressing device performs roller pressing, it further includes: Obtain the batch identification data of the wheel frame to be assembled; The demolding time data of the wheel frame to be assembled is determined based on the batch identification data; Calculate the settling time based on the demolding time data and the current time data; When the settling time is less than the preset settling threshold, the acquisition priority of the wheel frame temperature data is set to high priority.

[0011] Optionally, the step of obtaining wheel frame temperature data and roller temperature data includes: The first infrared sensor is controlled to collect the surface temperature of the central wheel frame, which is used as the wheel frame temperature data. The second infrared sensor is controlled to collect the surface temperature of the roller assembly, which is used as the roller temperature data.

[0012] Furthermore, to achieve the above objectives, the present invention also provides a control system for an automatic roller assembly line, characterized in that the control system comprises: The acquisition module is used to acquire wheel frame temperature data and roller temperature data; The analysis module is used to determine the pressing mode data and pressing termination displacement data based on the wheel frame temperature data, and to determine the riveting pressure data based on the roller temperature data. The control module is used to control the servo pressing device to perform roller pressing based on the pressing mode data, the pressing termination displacement data, and the riveting pressure data.

[0013] In addition, to achieve the above objectives, the present invention also provides an automatic roller assembly production equipment, the automatic roller assembly production equipment comprising: a memory, a processor, and an automatic roller assembly production line control program stored in the memory and executable on the processor, the automatic roller assembly production line control program being configured to implement the steps of the automatic roller assembly production line control method described above.

[0014] In addition, to achieve the above objectives, the present invention also provides a storage medium storing a control program for an automatic roller assembly line, wherein the automatic roller assembly line control program, when executed by a processor, implements the steps of the automatic roller assembly line control method described above.

[0015] This invention proposes a control method for an automated roller assembly production line. This method acquires roller frame temperature data and roller temperature data, determines pressing mode data and pressing termination displacement data based on the roller frame temperature data, and determines riveting pressure data based on the roller temperature data. Based on the pressing mode data, the pressing termination displacement data, and the riveting pressure data, a servo pressing device is controlled to perform roller pressing, thereby improving the stability of roller production quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the automatic roller assembly production equipment in the hardware operating environment involved in the embodiments of the present invention; Figure 2 This is a flowchart illustrating the first embodiment of the automatic roller assembly line control method of the present invention; Figure 3 This is a flowchart illustrating a second embodiment of the automatic roller assembly line control method of the present invention; The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0017] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0018] Reference Figure 1 , Figure 1 This is a schematic diagram of the automatic roller assembly production equipment structure of the hardware operating environment involved in the embodiment of the present invention.

[0019] like Figure 1 As shown, the automated roller assembly production equipment may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, an interactive device 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The interactive device 1003 may include a display screen or an input unit such as a keyboard. Optionally, the interactive device 1003 may also be connected to the communication bus via standard wired or wireless interfaces. The network interface 1004 may optionally include standard wired or wireless interfaces (such as a Wi-Fi interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk drive. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0020] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the automated assembly production equipment for rollers, and may include more or fewer parts than shown, or combine certain parts, or have different part arrangements.

[0021] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a data storage module, a network communication module, a user interface module, and an automatic roller assembly production program.

[0022] exist Figure 1In the roller automatic assembly production equipment shown, the network interface 1004 is mainly used for data communication with other devices; the interactive device 1003 is mainly used for data interaction with the user; the processor 1001 and memory 1005 in the roller automatic assembly production equipment of the present invention can be set in the roller automatic assembly production equipment. The roller automatic assembly production equipment calls the roller automatic assembly production line control program stored in the memory 1005 through the processor 1001 and executes the roller automatic assembly production line control method provided in the embodiment of the present invention.

[0023] This invention provides a control method for an automated roller assembly production line, referring to... Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the automatic roller assembly production line control method of the present invention.

[0024] In this embodiment, the control method for the automatic assembly line of rollers includes: Step S1: Obtain wheel frame temperature data and roller temperature data; In this embodiment, the wheel frame temperature data and roller temperature data are collected by a first infrared sensor and a second infrared sensor, respectively. The first infrared sensor is aimed at the surface of the central wheel frame to measure the current temperature of the wheel frame in real time; the second infrared sensor is aimed at the surface of the roller assembly to measure the current temperature of the roller in real time. The temperature data is transmitted to the production line's central control PLC at a millisecond refresh rate, serving as the core input for subsequent control decisions. Since the thermophysical properties of plastic materials have a significant impact on assembly quality, temperature detection is actually the most important operational monitoring method in the entire control system during the assembly process.

[0025] Step S2: Determine the pressing mode data and pressing termination displacement data based on the wheel frame temperature data, and determine the riveting pressure data based on the roller temperature data; It should be noted that different pressing modes should be used under different temperature conditions. The pressing mode data determines how the servo pressing equipment presses the metal pin into the assembly of the wheel frame and roller. Depending on the wheel frame temperature, the system selects one of three preset pressing modes: when the wheel frame temperature is high, the plastic material is relatively soft, so a high-speed, low-pressure sliding mode is used to avoid thermal creep; when the wheel frame temperature is low, the plastic material is relatively brittle, so a pulse micro-vibration pressing mode is used to prevent stress cracking; when the wheel frame temperature is within the normal temperature range, a standard constant-speed pressing mode is used. Furthermore, in this embodiment, the actual amount of pressing should also be different under different temperature conditions, i.e., the pressing termination displacement data, to ensure that the final axial clearance meets the standard. In addition, the riveting pressure data is dynamically adjusted according to the roller temperature and the slope of the pressing force-displacement curve, employing a flexible force-relieving strategy to protect the plastic structure under high-temperature conditions.

[0026] Step S3: Control the servo pressing device to perform roller pressing based on the pressing mode data, the pressing termination displacement data, and the riveting pressure data.

[0027] In this embodiment, the press head of the servo press-fitting equipment presses down according to the determined press-fitting mode data, inserting the metal pin through one roller, passing it through the central through hole of the roller frame, and reaching the other roller. The press head stops pressing when it reaches the position corresponding to the press-fitting termination displacement data. Subsequently, during the riveting stage, the press head performs spin riveting or stamping and flanging on the end of the metal pin, causing it to expand and lock into the roller. The pressure during the riveting process is controlled in real time by the riveting pressure data, ensuring reliable riveting quality under different temperature conditions without damaging the plastic parts.

[0028] In this embodiment, by acquiring wheel frame temperature data and roller temperature data, pressing mode data and pressing termination displacement data are determined based on the wheel frame temperature data, and riveting pressure data is determined based on the roller temperature data. The servo pressing equipment is then controlled to perform roller pressing based on the pressing mode data, the pressing termination displacement data, and the riveting pressure data, thereby improving the stability of the quality of the produced rollers.

[0029] Furthermore, based on the first embodiment, a second embodiment of the automatic roller assembly line control method of the present invention is proposed. In this embodiment, reference is made to... Figure 3 The step of determining the pressing mode data based on the wheel frame temperature data includes: Step S21: When the wheel frame temperature data is greater than the preset high temperature threshold, the pressing mode data is determined to be a high-speed low-pressure sliding mode. The pressing head running speed corresponding to the high-speed low-pressure sliding mode is greater than the preset standard speed and the pressing head output pressure is less than the preset standard pressure. It should be noted that the preset high-temperature threshold is generally set to 45℃. When the wheel frame first emerges from the injection molding machine in a hot, soft state, typically between 45℃ and 60℃, the yield strength of the plastic decreases, and the material becomes softer. If the pin is pressed in at normal speed and pressure under these conditions, it can easily cause the hole wall to flanging and tear, and continuous high pressure will cause creep and pore expansion in the hot plastic, resulting in axial eccentricity after cooling. The high-speed, low-pressure sliding mode utilizes the characteristic of reduced yield strength of plastic when heated, quickly sliding the pin into place at a faster speed and lower pressure, reducing the contact time between the indenter and the plastic, and preventing irreversible deformation of the hot plastic under continuous high pressure.

[0030] Step S22: When the wheel frame temperature data is less than the preset low temperature threshold, the pressing mode data is determined to be pulse micro-vibration pressing mode. The pressing head corresponding to the pulse micro-vibration pressing mode reciprocates and propels with a preset vibration frequency and a preset small amplitude. In this embodiment, the preset low-temperature threshold is generally set to 15°C, but this threshold is not a limitation. When the workshop temperature is extremely low in winter or the wheel frame is made of cold material stored for a long time, the material becomes brittle and hard. If the pin is directly and forcibly pressed in, micro-stress cracks are easily generated inside the plastic. These cracks will gradually expand during subsequent use, eventually leading to wheel breakage. In the pulse micro-vibration pressing mode, the pressure head does not press all the way down, but rather moves downwards with high-frequency micro-displacement reciprocating vibration. This micro-vibration can provide a very short stress release window for the brittle plastic molecular chains, while using frictional heat to slightly heat the hole wall locally, preventing the plastic wheel frame from cracking due to hard impact.

[0031] Step S23: When the wheel frame temperature data is within the preset normal temperature range, the pressing mode data is determined to be the standard constant speed pressing mode.

[0032] Furthermore, the step of determining the press-fit termination displacement data based on the wheel frame temperature data includes: Based on the wheel frame temperature data, a preset thermal shrinkage displacement correction table is consulted to determine the cooling shrinkage compensation amount corresponding to the wheel frame temperature data; Calculate the press-fit termination target position based on the target axial clearance value and the cooling shrinkage compensation amount; The press-fit termination target position is used as the press-fit termination displacement data, wherein the press-fit termination displacement data is used to compensate for the axial dimensional shrinkage after the wheel frame is cooled.

[0033] In this embodiment, the heat shrinkage displacement correction table is a pre-calibrated data table based on the thermal expansion coefficient of engineering plastics and the geometric dimensions of the wheel frame. This is because the axial dimension of the plastic wheel frame widens due to thermal expansion when hot. If it is pressed according to the fixed dimensions at room temperature, the wheel frame will shrink after cooling, causing the rollers on both sides to clamp and jam, or the thermal expansion after cold assembly will cause excessive gaps and wobbling. The correction table records the axial shrinkage of the wheel frame when it cools to standard room temperature at different temperatures. The system directly looks up the table to obtain the compensation amount based on the current measured temperature. The target axial clearance is the core quality indicator of roller assembly, referring to the allowable movement of the left and right wheels on the axle, which is usually between 0.15mm and 0.30mm. The calculation method for the press-fit termination target position is as follows: based on the target axial clearance value, add the cooling shrinkage compensation amount corresponding to the current temperature to obtain the position where the actual press-fit should terminate. In this embodiment, the servo press-fit machine does not use the mechanical dead limit as the termination condition, but rather the corrected displacement amount at the current temperature. For example, if the wheel frame temperature is detected to be 50℃, the system calculates that this dimension will shrink inward by a certain amount when cooled to 20℃. Therefore, the PLC instructs the servo pressure head to deliberately press in less of this shrinkage amount at the current mechanical position, i.e., leaving a prestress gap. When the product has completely cooled down, the plastic part naturally shrinks, and the gap just reaches the target axial clearance.

[0034] Furthermore, based on the first or second embodiment, a third embodiment of the automatic roller assembly line control method of the present invention is proposed. In this embodiment, the step of determining the riveting pressure data based on the roller temperature data includes: The reference riveting pressure value is determined based on the roller temperature data; During the riveting stage, the pressing force displacement curve data is collected in real time, and the current curve slope is calculated based on the pressing force displacement curve data. Determine whether the slope of the current curve is less than a preset slope threshold; When the slope of the current curve is less than the preset slope threshold, the flexible unloading pressure value is determined according to the reference riveting pressure value, and the flexible unloading pressure value is used as the riveting pressure data, wherein the flexible unloading pressure value is less than the reference riveting pressure value.

[0035] In this embodiment, the reference riveting pressure value is the basic pressure required to complete the pin riveting under standard temperature conditions. When the roller temperature deviates from the standard temperature, the stiffness and compressive strength of the plastic hub will change, so temperature compensation is required for the reference pressure. The higher the temperature, the softer the plastic, and the lower the actual required riveting pressure; the lower the temperature, the harder the plastic, and the pressure can be appropriately increased. The force-displacement curve reflects the relationship between the force applied during the pressing process and the displacement of the press head. The slope of the curve characterizes the equivalent stiffness of the material being pressed: a larger slope indicates that the material has a strong resistance to deformation, while a smaller slope indicates that the material has begun to undergo plastic deformation or that the internal structure has loosened. Of course, during the riveting stage, the system calculates the current slope of the curve in real time at a millisecond-level sampling frequency.

[0036] Furthermore, based on any of the above embodiments, a fourth embodiment of the automatic roller assembly production line control method of the present invention is proposed. In this embodiment, the step of controlling the servo pressing equipment to perform roller pressing according to the pressing mode data, the pressing termination displacement data, and the riveting pressure data includes: The servo press-fitting device is controlled to press the metal pin into the center wheel frame and the two side rollers according to the press-fitting mode data; When the pressure head of the servo pressing device reaches the position corresponding to the pressing termination displacement data, the pressure head is controlled to stop pressing down; During the riveting stage, the pressure head is controlled to perform spin riveting or stamping and flanging on the end of the metal pin according to the riveting pressure data.

[0037] In this embodiment, the standard physical assembly path is as follows: the wheel frame is placed in the center, and the left and right rollers are aligned with the through holes on both sides of the wheel frame; the pin passes through the left roller, through the center of the wheel frame, and reaches the right roller. The servo pressure head presses down according to the currently selected pressing mode, pressing the pin completely into place. The pressing termination displacement data already includes the thermal shrinkage compensation, so the position where the pressure head stops is a dynamic position after temperature correction, rather than a mechanical fixed limit. This ensures that the rollers on both sides obtain accurate axial clearance after the wheel frame cools down. During the riveting stage, the pressure head applies a spinning force or impact force to the end of the pin, causing the end of the pin to undergo plastic deformation to form a rivet head or flange, thereby firmly locking the wheel frame and the rollers on both sides into a whole. The real-time pressure during the riveting process is controlled by the riveting pressure data, and automatically switches to a flexible unloading mode under high temperature conditions to protect the positioning steps of the plastic wheel hub from being crushed. Of course, in other embodiments, the pin here can be a metal pin.

[0038] Furthermore, based on any of the above embodiments, a fifth embodiment of the automatic roller assembly production line control method of the present invention is proposed. In this embodiment, before the control servo pressing equipment performs roller pressing, the method further includes: Obtain the batch identification data of the wheel frame to be assembled; The demolding time data of the wheel frame to be assembled is determined based on the batch identification data; Calculate the settling time based on the demolding time data and the current time data; When the settling time is less than the preset settling threshold, the acquisition priority of the wheel frame temperature data is set to high priority.

[0039] In this embodiment, each wheel frame is attached with a batch identifier, such as a QR code or RFID tag, during injection molding, recording information such as the production batch, injection molding machine number, and demolding time. A barcode scanner or RFID reader on the assembly line automatically collects this batch identifier data when the wheel frame is loaded and transmits it to the PLC for subsequent process decisions. The PLC queries the production database based on the batch identifier data to obtain the exact time the wheel frame was removed from the injection mold, i.e., the demolding time. The demolding time reflects the initial temperature state and subsequent cooling process of the wheel frame. A preset settling threshold can be 30 minutes. When the settling time is less than this threshold, it indicates that the wheel frame is fresh, hot material that has just come off the production line, with large temperature fluctuations that are sensitive to assembly quality. Therefore, the PLC increases the frequency of temperature data collection for this wheel frame to ensure the most accurate temperature reading before pressing. Of course, since queuing is generally required in actual production, cold material with a settling time exceeding the threshold is collected at the normal frequency.

[0040] Furthermore, this invention also proposes an automatic roller assembly line control system, which includes: The acquisition module is used to acquire wheel frame temperature data and roller temperature data; The analysis module is used to determine the pressing mode data and pressing termination displacement data based on the wheel frame temperature data, and to determine the riveting pressure data based on the roller temperature data. The control module is used to control the servo pressing device to perform roller pressing based on the pressing mode data, the pressing termination displacement data, and the riveting pressure data.

[0041] Furthermore, the first infrared sensor is controlled to collect the surface temperature of the central wheel frame, which is used as the wheel frame temperature data; The second infrared sensor is controlled to collect the surface temperature of the roller assembly, which is used as the roller temperature data.

[0042] Both the first and second infrared sensors are non-contact temperature measurement devices, positioned above the loading station on the assembly line, respectively aligned with the surfaces of the central wheel frame and the roller assembly. The advantage of infrared sensors is that they do not require physical contact with the plastic parts, avoiding scratches or contamination to the part surfaces caused by contact temperature measurement. Furthermore, this invention also proposes an automatic roller assembly production equipment, which includes: a memory, a processor, and an automatic roller assembly production line control program stored in the memory and executable on the processor. The automatic roller assembly production line control program is configured to implement the steps of the automatic roller assembly production line control method described above.

[0043] Furthermore, this embodiment of the invention also proposes a storage medium storing a control program for an automatic roller assembly line, wherein the automatic roller assembly line control program, when executed by a processor, implements the steps of the automatic roller assembly line control method described above.

[0044] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0045] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0046] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0047] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A control method for an automated roller assembly line, characterized in that, The control method for the automatic assembly line of rollers includes the following steps: Acquire wheel frame temperature data and roller temperature data; The pressing mode data and pressing termination displacement data are determined based on the wheel frame temperature data, and the riveting pressure data is determined based on the roller temperature data. The servo press-fitting device is controlled to perform roller press-fitting based on the press-fitting mode data, the press-fitting termination displacement data, and the riveting pressure data.

2. The control method for an automated roller assembly line as described in claim 1, characterized in that, The step of determining the pressing mode data based on the wheel frame temperature data includes: When the wheel frame temperature data is greater than the preset high temperature threshold, the pressing mode data is determined to be the high-speed low-pressure slide-in mode. The pressing head running speed corresponding to the high-speed low-pressure slide-in mode is greater than the preset standard speed and the pressing head output pressure is less than the preset standard pressure. When the wheel frame temperature data is less than the preset low temperature threshold, the pressing mode data is determined to be the pulse micro-vibration pressing mode. The pressing head corresponding to the pulse micro-vibration pressing mode is pushed forward by reciprocating vibration with a preset vibration frequency and a preset small amplitude. When the wheel frame temperature data is within the preset normal temperature range, the pressing mode data is determined to be the standard constant speed pressing mode.

3. The control method for an automated roller assembly line as described in claim 1, characterized in that, The step of determining the press-fit termination displacement data based on the wheel frame temperature data includes: Based on the wheel frame temperature data, a preset thermal shrinkage displacement correction table is consulted to determine the cooling shrinkage compensation amount corresponding to the wheel frame temperature data; Calculate the press-fit termination target position based on the target axial clearance value and the cooling shrinkage compensation amount; The press-fit termination target position is used as the press-fit termination displacement data, wherein the press-fit termination displacement data is used to compensate for the axial dimensional shrinkage after the wheel frame is cooled.

4. The control method for an automated roller assembly line as described in claim 1, characterized in that, The step of determining the riveting pressure data based on the roller temperature data includes: The reference riveting pressure value is determined based on the roller temperature data; During the riveting stage, the pressing force displacement curve data is collected in real time, and the current curve slope is calculated based on the pressing force displacement curve data. Determine whether the slope of the current curve is less than a preset slope threshold; When the slope of the current curve is less than the preset slope threshold, the flexible unloading pressure value is determined according to the reference riveting pressure value, and the flexible unloading pressure value is used as the riveting pressure data, wherein the flexible unloading pressure value is less than the reference riveting pressure value.

5. The control method for an automated roller assembly line as described in claim 1, characterized in that, The step of controlling the servo pressing device to perform roller pressing based on the pressing mode data, the pressing termination displacement data, and the riveting pressure data includes: The servo press-fitting device is controlled to press the metal pin into the center wheel frame and the two side rollers according to the press-fitting mode data; When the pressure head of the servo pressing device reaches the position corresponding to the pressing termination displacement data, the pressure head is controlled to stop pressing down; During the riveting stage, the pressure head is controlled to perform spin riveting or stamping and flanging on the end of the metal pin according to the riveting pressure data.

6. The control method for an automated roller assembly line as described in claim 1, characterized in that, Before the control servo pressing device performs roller pressing, it also includes: Obtain the batch identification data of the wheel frame to be assembled; The demolding time data of the wheel frame to be assembled is determined based on the batch identification data; Calculate the settling time based on the demolding time data and the current time data; When the settling time is less than the preset settling threshold, the acquisition priority of the wheel frame temperature data is set to high priority.

7. The control method for an automated roller assembly line as described in any one of claims 1 to 6, characterized in that, The steps for obtaining wheel frame temperature data and roller temperature data include: The first infrared sensor is controlled to collect the surface temperature of the central wheel frame, which is used as the wheel frame temperature data. The second infrared sensor is controlled to collect the surface temperature of the roller assembly, which is used as the roller temperature data.

8. A control system for an automatic assembly line of rollers, characterized in that, The automatic assembly line control system for the rollers includes: The acquisition module is used to acquire wheel frame temperature data and roller temperature data; The analysis module is used to determine the pressing mode data and pressing termination displacement data based on the wheel frame temperature data, and to determine the riveting pressure data based on the roller temperature data. The control module is used to control the servo pressing device to perform roller pressing based on the pressing mode data, the pressing termination displacement data, and the riveting pressure data.

9. An automatic roller assembly production equipment, characterized in that, The automatic roller assembly production equipment includes: a memory, a processor, and an automatic roller assembly production line control program stored in the memory and executable on the processor, wherein the automatic roller assembly production line control program is configured to implement the steps of the automatic roller assembly production line control method as described in any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium stores a control program for an automatic roller assembly line, which, when executed by a processor, implements the steps of the automatic roller assembly line control method as described in any one of claims 1 to 7.

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