A kind of production method and equipment for aluminum foil lunch box

Abstract

The present invention relates to the field of stamping metal technology, and specifically to a production method and equipment for aluminum foil lunch boxes, the method comprising: obtaining the weight and average thickness of an aluminum foil raw material segment to be stamped for making an aluminum foil lunch box, and obtaining the upper mold drop height value corresponding to the aluminum foil raw material segment to be stamped at the current moment; determining the reference quality index corresponding to the aluminum foil raw material segment to be stamped; performing linear fitting according to the upper mold drop height values ​​corresponding to at least two moments in the entire historical stamping process of the standard aluminum foil raw material segment, to obtain a standard linear fitting function; determining the standard drop height value at the current moment according to the standard linear fitting function and the current moment; adjusting the stamping force at the current moment according to the reference quality index, the target drop height value, the standard drop height value and the preset stamping force. The present invention realizes real-time adjustment of the stamping pressure, thereby improving the rationality of setting the stamping force of the stamping forming machine.

Description

Technical Field

[0001] The invention relates to the technical field of stamping metals, and in particular to a production method and equipment for an aluminum foil lunch box. Background Art

[0002] In the production process of aluminum foil lunch boxes, it is often necessary to cut the aluminum foil raw material to obtain multiple aluminum foil raw material segments, and then use a stamping machine to stamp the aluminum foil raw material segments into aluminum foil lunch boxes. At present, when producing the same type of aluminum foil lunch boxes, a fixed stamping force is often set for the stamping machine based on manual experience.

[0003] The fixed punching pressure set based on manual experience is often set based on the thickness of the aluminum foil raw material segment required for making the aluminum foil lunch box. However, the thickness of the aluminum foil raw material segment is often not uniform. For example, although the overall thickness of some aluminum foil raw material segments may be qualified, they may be thicker in a certain place. At this time, if the fixed punching pressure set based on manual experience is continued to be used, it may be difficult to cope with the resistance caused by the thicker area, resulting in difficulty in successfully stamping the aluminum foil raw material segment with the thicker area, which often indicates that the rationality of the punching pressure setting at this time is poor. Summary of the invention

[0004] In order to solve the technical problem that the rationality of setting the punching force of a punching forming machine is poor, the present invention proposes a production method and equipment for an aluminum foil lunch box.

[0005] In a first aspect, the present invention provides a method for producing an aluminum foil lunch box, the method comprising:

[0006] Obtain the weight and average thickness of the aluminum foil raw material segment to be punched for making the aluminum foil lunch box, and obtain the upper mold descent height value corresponding to the aluminum foil raw material segment to be punched at the current moment as the target descent height value, wherein the current moment is the end moment of the current punching process;

[0007] Determining a reference quality index corresponding to the aluminum foil raw material segment to be stamped according to the weight and average thickness of the aluminum foil raw material segment to be stamped, and the weight and average thickness of a preset number of historical aluminum foil raw material segments;

[0008] Performing linear fitting on the upper die drop height values ​​corresponding to at least two moments in the entire historical stamping process of the standard aluminum foil raw material segment obtained in advance to obtain a standard linear fitting function;

[0009] Determine a standard descent height value at the current moment according to the standard linear fitting function and the current moment;

[0010] The punching force at the current moment is adjusted according to the reference quality index, the target descent height value, the standard descent height value and the preset punching force.

[0011] In combination with the first aspect above, in a possible implementation, determining the reference quality index corresponding to the aluminum foil raw material segment to be stamped according to the weight and average thickness of the aluminum foil raw material segment to be stamped, and the weight and average thickness of a preset number of historical aluminum foil raw material segments, includes:

[0012] Determining a first quality factor corresponding to the aluminum foil raw material segment to be stamped according to the weight of the aluminum foil raw material segment to be stamped and the average of the weights of a preset number of historical aluminum foil raw material segments;

[0013] Determine a second quality factor corresponding to the aluminum foil raw material segment to be punched according to the average thickness of the aluminum foil raw material segment to be punched and the average of the average thicknesses of a preset number of historical aluminum foil raw material segments;

[0014] A reference quality index corresponding to the aluminum foil raw material segment to be punched is determined according to a first quality factor and a second quality factor corresponding to the aluminum foil raw material segment to be punched, wherein the first quality factor and the second quality factor are both positively correlated with the reference quality index.

[0015] In combination with the first aspect above, in a possible implementation, determining the first quality factor corresponding to the aluminum foil raw material segment to be stamped according to the weight of the aluminum foil raw material segment to be stamped and the average of the weights of a preset number of historical aluminum foil raw material segments includes:

[0016] The average weight of a preset number of historical aluminum foil raw material segments is determined as the standard weight;

[0017] The difference between the weight of the aluminum foil raw material segment to be punched and the standard weight is normalized to obtain a first quality factor corresponding to the aluminum foil raw material segment to be punched.

[0018] In combination with the first aspect above, in a possible implementation, determining the second quality factor corresponding to the aluminum foil raw material segment to be punched according to the average thickness of the aluminum foil raw material segment to be punched and the average of the average thicknesses of a preset number of historical aluminum foil raw material segments includes:

[0019] The average of the average thicknesses of a preset number of historical aluminum foil raw material segments is determined as the standard average thickness;

[0020] The ratio of the average thickness of the aluminum foil raw material segment to be punched to the standard average thickness is determined as the second quality factor corresponding to the aluminum foil raw material segment to be punched.

[0021] In combination with the first aspect above, in a possible implementation manner, determining the standard descent height value at the current moment according to the standard linear fitting function and the current moment includes:

[0022] Selecting a moment in the same stamping stage as the current moment from the entire historical stamping process corresponding to the standard aluminum foil raw material segment as a reference moment;

[0023] Substitute the reference time into the standard linear fitting function, and determine the obtained function value as the standard descent height value at the current time.

[0024] In combination with the first aspect above, in a possible implementation manner, the independent variable of the standard linear fitting function is the time, and the dependent variable is the descending height value of the upper mold.

[0025] In combination with the first aspect above, in a possible implementation manner, adjusting the punching force at the current moment according to the reference quality index, the target descent height value, the standard descent height value and the preset punching force includes:

[0026] Determining the initial adjustment factor at the current moment according to the difference between the target descent height value and the standard descent height value;

[0027] Determining the target adjustment factor at the current moment according to the reference quality indicator and the initial adjustment factor, wherein both the reference quality indicator and the initial adjustment factor are positively correlated with the target adjustment factor;

[0028] Determining the target punching force at the current moment according to the target adjustment factor and the preset punching force, wherein the target adjustment factor and the preset punching force are both positively correlated with the target punching force;

[0029] Adjust the punching force of the punch forming machine to make it equal to the target punching force.

[0030] In combination with the first aspect above, in a possible implementation manner, determining the initial adjustment factor at the current moment according to the difference between the target descent height value and the standard descent height value includes:

[0031] If the difference between the standard descent height value and the target descent height value is less than or equal to a preset value, the preset value is determined as the initial adjustment factor at the current moment;

[0032] If the difference between the standard descent height value and the target descent height value is greater than a preset value, the difference between the standard descent height value and the target descent height value is determined as the initial adjustment factor at the current moment.

[0033] In combination with the first aspect, in a possible implementation manner, determining the target adjustment factor at the current moment according to the reference quality indicator and the initial adjustment factor includes:

[0034] The product of the reference quality indicator and the initial adjustment factor is normalized to obtain the target adjustment factor at the current moment.

[0035] In a second aspect, the present invention provides a production device for an aluminum foil lunch box, the device comprising:

[0036] A data acquisition module is used to obtain the weight and average thickness of the aluminum foil raw material segment to be punched for making the aluminum foil lunch box, and obtain the upper mold descent height value corresponding to the aluminum foil raw material segment to be punched at the current moment as a target descent height value, wherein the current moment is the end moment of the current punching process;

[0037] A quality index determination module, used to determine a reference quality index corresponding to the aluminum foil raw material segment to be stamped according to the weight and average thickness of the aluminum foil raw material segment to be stamped and the weight and average thickness of a preset number of historical aluminum foil raw material segments;

[0038] A linear fitting module is used to perform linear fitting according to the upper die descending height values ​​corresponding to at least two moments in the entire historical stamping process of the standard aluminum foil raw material segment obtained in advance, so as to obtain a standard linear fitting function;

[0039] A descent height value determination module, used to determine a standard descent height value at the current moment according to the standard linear fitting function and the current moment;

[0040] The punching force regulating module is used to regulate the punching force at the current moment according to the reference quality index, the target descent height value, the standard descent height value and the preset punching force.

[0041] In a third aspect, a server is provided, comprising a memory and a processor. The memory is used to store executable program code, and the processor is used to call and run the executable program code from the memory, so that the device executes the method in the first aspect or any possible implementation of the first aspect.

[0042] In a fourth aspect, a computer program product is provided, comprising: a computer program code, which, when executed on a computer, enables the computer to execute the method in the first aspect or any possible implementation of the first aspect.

[0043] In a fifth aspect, a computer-readable storage medium is provided, which stores a computer program code. When the computer program code runs on a computer, the computer executes the method in the above-mentioned first aspect or any possible implementation manner of the first aspect.

[0044] The present invention has the following beneficial effects:

[0045] The production method for aluminum foil lunch boxes of the present invention realizes real-time adjustment of the punching pressure, solves the technical problem of poor rationality of punching pressure setting for a punching forming machine, and thus improves the rationality of punching pressure setting for a punching forming machine. Compared with the fixed punching pressure set according to manual experience, the present invention comprehensively considers multiple factors related to the punching pressure setting, such as the weight and average thickness of the aluminum foil raw material segment to be punched, and the upper mold drop height value collected in real time, thereby relatively objectively quantifying the reference quality index corresponding to the aluminum foil raw material segment to be punched, and quantifying the standard drop height value, and finally adjusting the punching pressure at the current moment based on the reference quality index, the target drop height value, the standard drop height value and the preset punching pressure, realizing adaptive adjustment of the punching pressure, which can reduce the situation where it is difficult to successfully punch and form the aluminum foil raw material segment with a thicker area to a certain extent, thereby improving the rationality of punching pressure setting for a punching forming machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 A flow chart of a method for producing an aluminum foil lunch box according to the present invention;

[0048] Figure 2 It is a schematic diagram of the composition structure of a production device for aluminum foil lunch boxes of the present invention;

[0049] Figure 3 The figure is a schematic diagram of the structure of a computer device of the present invention. DETAILED DESCRIPTION

[0050] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the technical solutions proposed by the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0051] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0052] refer to Figure 1 , showing the process of some embodiments of a method for producing an aluminum foil lunch box of the present invention. The method for producing an aluminum foil lunch box comprises the following steps:

[0053] Step S1, obtaining the weight and average thickness of the aluminum foil raw material segment to be punched for making the aluminum foil lunch box, and obtaining the upper mold descent height value corresponding to the aluminum foil raw material segment to be punched at the current moment as the target descent height value.

[0054] Among them, the aluminum foil raw material segment to be stamped can be an aluminum foil raw material segment for making an aluminum foil lunch box. In actual situations, in the production process of aluminum foil lunch boxes, it is often necessary to cut the aluminum foil raw material to obtain multiple aluminum foil raw material segments, and stamp the aluminum foil raw material segments to form an aluminum foil lunch box. Aluminum foil raw material, that is, the production raw material is aluminum foil. The aluminum foil raw material segment can be a cut aluminum foil segment for stamping and forming an aluminum foil lunch box. The average thickness of the aluminum foil raw material segment to be stamped can be characterized by the average of the thickness at different positions on the aluminum foil raw material segment to be stamped. The current moment can be the end moment of the current stamping process. The current stamping process can be the stamping process currently being carried out on the aluminum foil raw material segment to be stamped by the stamping forming machine. The upper mold drop height value corresponding to the current moment can be the distance that the upper mold of the stamping forming machine drops from the unpressurized state to the pressurized state at the current moment.

[0055] As an example, the weight of the aluminum foil raw material segment to be stamped can be collected by a weight sensor; the thickness at different preset positions on the aluminum foil raw material segment to be stamped can be collected by a thickness sensor, and the average of the thickness at all preset positions is used as the average thickness of the aluminum foil raw material segment to be stamped, wherein the preset position can be a pre-set position, and the distances between adjacent preset positions can be the same; the distance that the upper mold of the stamping machine descends from a non-pressurized state to a pressurized state at the current moment is collected by a height gauge as a target descent height value.

[0056] It should be noted that the equipment used for the production of aluminum foil lunch boxes can represent an efficient and automated production line that can continuously and stably produce high-quality aluminum foil lunch boxes. For example, the ATW-PT01 aluminum foil lunch box production line mainly includes an automated feeding system, a stamping machine, a waste recovery system, and an automated control system. Among them, the stamping force control of the stamping machine is one of the key links to ensure the quality of the aluminum foil lunch box. By controlling the stamping force of the stamping machine, the quality of the aluminum foil lunch box can be ensured to be stable, the defective rate can be reduced, and production efficiency can be improved. The automated feeding system can gradually feed the aluminum foil coil into the forming area to ensure that the aluminum foil maintains the correct path and position during the feeding process, while maintaining the appropriate tension required by the aluminum foil during the feeding process to prevent tearing. The stamping machine is equipped with a high-precision mold that can stamp the aluminum foil raw material into lunch boxes of various specifications and shapes. It is also equipped with an automatic lubrication system to reduce friction and mold wear. The waste recovery system can collect the aluminum foil scraps generated during the stamping process, and recycle them uniformly after compression to reduce material waste and environmental pollution. The automated control system may include a PLC (Programmable Logic Controller), a variety of sensors and detection devices, which can monitor various parameters in the production process in real time, such as position, speed and pressure, etc., to ensure production quality and perform regulation. The embodiment of the present invention is mainly used to achieve adaptive regulation of the punching pressure.

[0057] Step S2, determining a reference quality index corresponding to the aluminum foil raw material segment to be punched according to the weight and average thickness of the aluminum foil raw material segment to be punched and the weight and average thickness of a preset number of historical aluminum foil raw material segments.

[0058] The preset number may be a pre-set number. For example, the preset number may be 100. The historical aluminum foil raw material segment may be an aluminum foil raw material segment that has been punched to form an aluminum foil lunch box. The specifications of the aluminum foil lunch box formed by punching the historical aluminum foil raw material segment may be the same as the specifications of the aluminum foil lunch box to be punched by the aluminum foil raw material segment to be punched. The method for obtaining the weight and average thickness of the historical aluminum foil raw material segment may be the same as the method for obtaining the weight and average thickness of the aluminum foil raw material segment to be punched.

[0059] As an example, this step may include the following steps:

[0060] The first step, according to the weight of the aluminum foil raw material segment to be punched and the average weight of a preset number of historical aluminum foil raw material segments, determines the first quality factor corresponding to the aluminum foil raw material segment to be punched, which may include the following sub-steps:

[0061] In the first sub-step, the average weight of a preset number of historical aluminum foil raw material segments is determined as the standard weight.

[0062] The second sub-step is to normalize the difference between the weight of the aluminum foil raw material segment to be punched and the standard weight to obtain a first quality factor corresponding to the aluminum foil raw material segment to be punched.

[0063] The second step, according to the average thickness of the aluminum foil raw material segment to be punched and the average of the average thickness of a preset number of historical aluminum foil raw material segments, determines the second quality factor corresponding to the aluminum foil raw material segment to be punched, which may include the following sub-steps:

[0064] In the first sub-step, the average of the average thicknesses of a preset number of historical aluminum foil raw material segments is determined as the standard average thickness.

[0065] In the second sub-step, the ratio of the average thickness of the aluminum foil raw material segment to be punched to the standard average thickness is determined as the second quality factor corresponding to the aluminum foil raw material segment to be punched.

[0066] The third step is to determine a reference quality index corresponding to the aluminum foil raw material segment to be punched according to the first quality factor and the second quality factor corresponding to the aluminum foil raw material segment to be punched.

[0067] Wherein, both the first quality factor and the second quality factor may be positively correlated with the reference quality index.

[0068] For example, the formula for determining the reference quality index corresponding to the section of aluminum foil raw material to be stamped may be:

[0069] ;in, It is the reference quality index corresponding to the raw material section of aluminum foil to be stamped. is a normalization function. It is the weight of the aluminum foil raw material section to be stamped. It is the standard weight, that is, the average weight of a preset number of historical aluminum foil raw material segments. It is the average thickness of the raw aluminum foil section to be stamped. It is the standard average thickness, that is, the average of the average thickness of a preset number of historical aluminum foil raw material sections. is the first quality factor. is the second quality factor.

[0070] It should be noted that, in actual situations, when the aluminum foil raw material is cut into aluminum foil raw material segments, the length and width of the cut are often fixed, that is, the plane dimensions of the aluminum foil raw material segments used to make the same aluminum foil lunch box are often the same, but wrinkles often occur in some parts of the aluminum foil coil. The weight of the aluminum foil raw material segment where the wrinkles are located is often greater than the weight of the aluminum foil raw material segment with uniform thickness, and a larger punching force is often required during stamping. It can characterize the weight of most aluminum foil raw material segments. The larger it is, the more likely it is that the weight of the aluminum foil raw material segment to be punched is higher than the weight of most aluminum foil raw material segments, the more likely it is that wrinkles may exist on the aluminum foil raw material segment to be punched, the more likely it is that there may be local thicker areas on the aluminum foil raw material segment to be punched, and the greater the punching pressure is required to punch the aluminum foil raw material segment to be punched. It can characterize the average thickness of most aluminum foil raw material segments. The larger the value, the more likely it is that the average thickness of the aluminum foil raw material segment to be stamped is higher than the average thickness of most aluminum foil raw material segments, which means that the hardness of the aluminum foil raw material segment to be stamped is relatively high, and a larger stamping force is often required when stamping the aluminum foil raw material segment to be stamped. The larger the value is, the greater the punching pressure may be required when punching the aluminum foil raw material segment.

[0071] Step S3, performing linear fitting based on the upper die descending height values ​​corresponding to at least two moments in the entire historical stamping process of the standard aluminum foil raw material segment obtained in advance, to obtain a standard linear fitting function.

[0072] Among them, the standard aluminum foil raw material segment can be a high-quality aluminum foil raw material segment used for stamping and forming an aluminum foil lunch box. For example, the standard aluminum foil raw material segment can be an aluminum foil raw material segment with uniform thickness and an average thickness that meets the requirements of stamping and forming. The specifications and models of the aluminum foil lunch box formed by stamping and forming the standard aluminum foil raw material segment can be the same as the specifications and models of the aluminum foil lunch box to be stamped and formed by the aluminum foil raw material segment to be stamped. The entire historical stamping process corresponding to the standard aluminum foil raw material segment can be a process in which the standard aluminum foil raw material segment is stamped and formed by a stamping and forming machine. The independent variable of the above-mentioned standard linear fitting function can be the moment, and the dependent variable can be the height value of the upper mold descent.

[0073] As an example, a method for obtaining a standard linear fitting function may be as follows: using a height gauge, in the entire historical stamping process corresponding to the standard aluminum foil raw material segment, the upper mold descent height value corresponding to each moment is collected in real time as a reference descent height value, and a straight line is fitted with the collection time as the horizontal coordinate and the reference descent height value as the vertical coordinate, and the function expression corresponding to the obtained straight line is used as the standard linear fitting function.

[0074] Optionally, the method for obtaining the standard linear fitting function can also be: using a height gauge, in the entire historical stamping process corresponding to the standard aluminum foil raw material segment, real-time collection of the upper mold descent height value corresponding to each moment as a reference descent height value, and selecting two reference descent height values ​​from these reference descent height values, respectively as the first reference descent height value and the second reference descent height value, and according to the first reference descent height value and its corresponding collection time, and the second reference descent height value and its corresponding collection time, the formula corresponding to the standard linear fitting function can be determined as follows:

[0075] ;

[0076] in, represents the standard linear fitting function. y is the dependent variable of the standard linear fitting function. k is the slope of the standard linear fitting function. t is the independent variable of the standard linear fitting function. b is the intercept of the standard linear fitting function. is the first reference descent altitude value. It is the collection time corresponding to the first reference descent height value. is the second reference descent altitude value. is the acquisition time corresponding to the second reference descent height value, and .

[0077] It should be noted that, in actual situations, the upper mold of the stamping machine tends to descend at a uniform speed when it contacts a section of aluminum foil raw material with uniform thickness. However, if the thickness of a certain part of the aluminum foil raw material section is protruding, that is, it is thicker in a certain place, then the protruding part may produce relatively large resistance, which may cause the descent rate of the upper mold of the stamping machine to slow down or stop, making it difficult to successfully stamp the aluminum foil raw material section. The stamping process in which the upper mold of the stamping machine descends at a uniform speed when it contacts a section of aluminum foil raw material with uniform thickness can often be regarded as an ideal stamping process. Therefore, It can characterize the change of the upper die descent height value during the ideal stamping process.

[0078] Step S4, determining the standard descent height value at the current moment according to the standard linear fitting function and the current moment.

[0079] As an example, this step may include the following steps:

[0080] In the first step, a moment in the same stamping stage as the current moment is selected from the entire historical stamping process corresponding to the standard aluminum foil raw material segment as a reference moment.

[0081] It should be noted that the duration between adjacent collection moments in different stamping processes can be the same, so the moment number of the current moment in the current stamping process can be equal to the moment number of the reference moment in the historical stamping process. The moment number can represent the sequence number of the collection moment in the stamping process. For example, the moment number of the first collection moment in the stamping process can be 1.

[0082] For example, if the upper mold descent height value is collected every 0.2 seconds during the stamping process, and the current moment is the third collection moment in the current stamping process, the third collection moment in the entire historical stamping process corresponding to the standard aluminum foil raw material segment can be determined as the reference moment.

[0083] The second step is to substitute the above reference time into the above standard linear fitting function, and determine the obtained function value as the standard descent height value at the above current time.

[0084] The standard descent height value may be a function value calculated by taking the independent variable value of the standard linear fitting function as the reference moment.

[0085] Step S5, adjusting the punching force at the current moment according to the reference quality index, the target descent height value, the standard descent height value and the preset punching force.

[0086] The preset punching force may be the punching force required for punching and forming the standard aluminum foil raw material segment. For example, the preset punching force may be obtained by setting a fixed punching force for the punching and forming machine based on manual experience, which may be used as the preset punching force.

[0087] As an example, this step may include the following steps:

[0088] The first step, according to the difference between the target descent height value and the standard descent height value, determining the initial adjustment factor at the current moment may include the following sub-steps:

[0089] In the first sub-step, if the difference between the standard descent height value and the target descent height value is less than or equal to a preset value, the preset value is determined as the initial adjustment factor at the current moment.

[0090] The preset value may be a preset value, for example, 0.

[0091] In the second sub-step, if the difference between the standard descent height value and the target descent height value is greater than a preset value, the difference between the standard descent height value and the target descent height value is determined as the initial adjustment factor at the current moment.

[0092] For example, if the difference between the standard descent height value and the target descent height value is greater than a preset value, the formula for determining the initial adjustment factor at the current moment may be:

[0093] ;in, is the initial adjustment factor at the current moment. It is the standard descent height value at the current moment. is the target descent altitude value.

[0094] It should be noted that when The larger it is, it often means that in the stamping process at the current moment, the upper die descent height value corresponding to the aluminum foil raw material segment to be stamped is more likely to be smaller than the upper die descent height value at the same stage in the ideal stamping process; it often means that the upper die descent rate of the stamping machine at the current moment is more likely to slow down to a greater extent, which often means that the stamping machine is more likely to need a larger stamping force in the current stamping process, and it often means that a larger stamping force is more likely to be needed when stamping the aluminum foil raw material segment to be stamped.

[0095] The second step is to determine the target adjustment factor at the current moment based on the reference quality index and the initial adjustment factor.

[0096] Among them, the above-mentioned reference quality index and the above-mentioned initial adjustment factor can both be positively correlated with the above-mentioned target adjustment factor.

[0097] For example, the product of the reference quality index and the initial adjustment factor is normalized to obtain the formula corresponding to the target adjustment factor at the current moment:

[0098] ;in, is the target adjustment factor at the current moment. is a normalization function. is the initial adjustment factor at the current moment. It is the reference quality index corresponding to the raw material section of aluminum foil to be stamped.

[0099] It should be noted that when The larger the value, the more likely it is that a larger punching force may be required when punching the aluminum foil raw material segment. The larger the value, the more likely it is that the stamping machine may need a larger stamping force in the current stamping process, and the more likely it is that a larger stamping force may be needed when stamping the aluminum foil raw material segment. The larger the value is, the greater the punching pressure may be required when punching the aluminum foil raw material segment.

[0100] The third step is to determine the target punching force at the current moment according to the target adjustment factor and the preset punching force.

[0101] Among them, the above-mentioned target adjustment factor and the above-mentioned preset punching force can both be positively correlated with the above-mentioned target punching force.

[0102] For example, the formula for determining the target punching force at the current moment can be:

[0103] ; Where F is the target punching force at the current moment. It is the preset punching force. It is the target adjustment factor at the current moment.

[0104] It should be noted that when The larger the value is, the greater the punching pressure may be required when punching the aluminum foil raw material segment. It can represent the punching force required for punching the standard aluminum foil raw material segment, that is, the punching force under ideal conditions. Therefore, F can represent the punching force actually required when punching the aluminum foil raw material segment to be punched at the current moment.

[0105] The fourth step is to adjust the punching force of the punching machine to make it equal to the target punching force.

[0106] It should be noted that real-time adjustment of the punching force of the punching machine can ensure the quality of each aluminum foil lunch box to a certain extent, thereby reducing the defective rate and improving production efficiency.

[0107] refer to Figure 2 Based on the same inventive concept as the above method embodiment, the present invention provides a production device for aluminum foil lunch boxes, the device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the above computer program is executed by the processor, the steps of a production method for aluminum foil lunch boxes are implemented, which may specifically include:

[0108] The data acquisition module 201 is used to obtain the weight and average thickness of the aluminum foil raw material segment to be punched for making the aluminum foil lunch box, and obtain the upper mold descent height value corresponding to the above aluminum foil raw material segment to be punched at the current moment as the target descent height value, wherein the above current moment is the end moment of the current punching process;

[0109] The quality index determination module 202 is used to determine the reference quality index corresponding to the aluminum foil raw material segment to be stamped according to the weight and average thickness of the aluminum foil raw material segment to be stamped and the weight and average thickness of a preset number of historical aluminum foil raw material segments;

[0110] The linear fitting module 203 is used to perform linear fitting according to the upper die descending height values ​​corresponding to at least two moments in the entire historical stamping process of the standard aluminum foil raw material segment obtained in advance, so as to obtain a standard linear fitting function;

[0111] A descent height value determination module 204 is used to determine a standard descent height value at the current moment according to the standard linear fitting function and the current moment;

[0112] The punching force adjustment module 205 is used to adjust the punching force at the current moment according to the reference quality index, the target descent height value, the standard descent height value and the preset punching force.

[0113] Figure 3 is a schematic diagram of the structure of a computer device provided by an embodiment of the present invention. Figure 3 As shown, the computer device 300 includes: a memory 301, a processor 302, and a computer program 303 stored in the memory 301 and running on the processor 302, wherein when the processor 302 executes the computer program 303, the computer device can execute any one of the production methods for aluminum foil lunch boxes introduced above.

[0114] Based on the same inventive concept as the above method embodiment, the present invention provides a server, including a memory and a processor. The memory is used to store executable program code, and the processor is used to call and run the executable program code from the memory, so that the device executes any of the above methods for producing aluminum foil lunch boxes.

[0115] Based on the same inventive concept as the above method embodiment, the present invention provides a computer program product, which includes: computer program code, when the computer program code runs on a computer, the computer executes any one of the above methods for producing aluminum foil lunch boxes.

[0116] Based on the same inventive concept as the above-mentioned method embodiment, the present invention provides a computer-readable storage medium, which stores a computer program code. When the computer program code runs on a computer, the computer executes any one of the above-mentioned methods for producing aluminum foil lunch boxes.

[0117] In summary, compared with the fixed punching force set according to manual experience, the present invention comprehensively considers multiple factors related to the punching force setting, such as the weight and average thickness of the aluminum foil raw material segment to be punched, and the upper mold descent height value collected in real time, so as to relatively objectively quantify the reference quality index corresponding to the aluminum foil raw material segment to be punched, and quantify the standard descent height value. Finally, based on the reference quality index, the target descent height value, the standard descent height value and the preset punching force, the punching force at the current moment is adjusted, thereby realizing adaptive adjustment of the punching force. To a certain extent, it can reduce the situation where it is difficult to successfully punch and form the aluminum foil raw material segment with relatively thick areas, thereby improving the rationality of setting the punching force for the stamping machine.

[0118] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for producing an aluminum foil lunch box, It is characterized in that The following steps are involved: Obtain the weight and average thickness of the aluminum foil raw material segment to be punched for making the aluminum foil lunch box, and obtain the upper mold descent height value corresponding to the aluminum foil raw material segment to be punched at the current moment as the target descent height value, wherein the current moment is the end moment of the current punching process; Determining a reference quality index corresponding to the aluminum foil raw material segment to be stamped according to the weight and average thickness of the aluminum foil raw material segment to be stamped, and the weight and average thickness of a preset number of historical aluminum foil raw material segments; Performing linear fitting on the upper die drop height values ​​corresponding to at least two moments in the entire historical stamping process of the standard aluminum foil raw material segment obtained in advance to obtain a standard linear fitting function; Determine a standard descent height value at the current moment according to the standard linear fitting function and the current moment; According to the reference quality index, the target descent height value, the standard descent height value and the preset stamping force, the stamping force at the current moment is adjusted; Determining the reference quality index corresponding to the aluminum foil raw material segment to be stamped according to the weight and average thickness of the aluminum foil raw material segment to be stamped and the weight and average thickness of a preset number of historical aluminum foil raw material segments includes: Determining a first quality factor corresponding to the aluminum foil raw material segment to be stamped according to the weight of the aluminum foil raw material segment to be stamped and the average of the weights of a preset number of historical aluminum foil raw material segments; Determine a second quality factor corresponding to the aluminum foil raw material segment to be punched according to the average thickness of the aluminum foil raw material segment to be punched and the average of the average thicknesses of a preset number of historical aluminum foil raw material segments; Determine a reference quality index corresponding to the section of aluminum foil raw material to be punched according to a first quality factor and a second quality factor corresponding to the section of aluminum foil raw material to be punched, wherein the first quality factor and the second quality factor are both positively correlated with the reference quality index; Determining the first quality factor corresponding to the aluminum foil raw material segment to be punched according to the weight of the aluminum foil raw material segment to be punched and the average of the weights of a preset number of historical aluminum foil raw material segments includes: The average weight of a preset number of historical aluminum foil raw material segments is determined as the standard weight; Normalizing the difference between the weight of the aluminum foil raw material segment to be stamped and the standard weight to obtain a first quality factor corresponding to the aluminum foil raw material segment to be stamped; Determining the second quality factor corresponding to the aluminum foil raw material segment to be punched according to the average thickness of the aluminum foil raw material segment to be punched and the average of the average thicknesses of a preset number of historical aluminum foil raw material segments includes: The average of the average thicknesses of a preset number of historical aluminum foil raw material segments is determined as the standard average thickness; The ratio of the average thickness of the aluminum foil raw material segment to be punched to the standard average thickness is determined as the second quality factor corresponding to the aluminum foil raw material segment to be punched; The step of adjusting the punching force at the current moment according to the reference quality index, the target descent height value, the standard descent height value and the preset punching force comprises: Determining the initial adjustment factor at the current moment according to the difference between the target descent height value and the standard descent height value; Determining the target adjustment factor at the current moment according to the reference quality indicator and the initial adjustment factor, wherein both the reference quality indicator and the initial adjustment factor are positively correlated with the target adjustment factor; Determining the target punching force at the current moment according to the target adjustment factor and the preset punching force, wherein the target adjustment factor and the preset punching force are both positively correlated with the target punching force; Adjust the punching force of the punching machine to make it equal to the target punching force; The determining the initial adjustment factor at the current moment according to the difference between the target descent height value and the standard descent height value includes: If the difference between the standard descent height value and the target descent height value is less than or equal to a preset value, the preset value is determined as the initial adjustment factor at the current moment; If the difference between the standard descent height value and the target descent height value is greater than a preset value, the difference between the standard descent height value and the target descent height value is determined as the initial adjustment factor at the current moment; The determining the target adjustment factor at the current moment according to the reference quality indicator and the initial adjustment factor includes: The product of the reference quality indicator and the initial adjustment factor is normalized to obtain the target adjustment factor at the current moment.

2. A method for producing an aluminum foil lunch box according to claim 1, It is characterized in that Determining the standard descent height value at the current moment according to the standard linear fitting function and the current moment includes: Selecting a moment in the same stamping stage as the current moment from the entire historical stamping process corresponding to the standard aluminum foil raw material segment as a reference moment; Substitute the reference time into the standard linear fitting function, and determine the obtained function value as the standard descent height value at the current time.

3. A method for producing an aluminum foil lunch box according to claim 1, It is characterized in that The independent variable of the standard linear fitting function is the time, and the dependent variable is the drop height value of the upper mold.

4. A production equipment for aluminum foil lunch boxes, It is characterized in that The method comprises a processor and a memory, wherein the processor is used to process instructions stored in the memory to implement a method for producing an aluminum foil lunch box according to any one of claims 1 to 3.

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