A method for detecting the passability of stamping parts

Abstract

The embodiment of the present application discloses a method for detecting the passability of part stamping, which relates to the field of vehicle manufacturing technology and can solve the problem that the passability of part stamping is difficult to detect in the early stage of part modeling design. The method for detecting the passability of part stamping includes extracting the parameter value of the relative height difference of the modeling surface of the part along the stamping direction; obtaining the maximum stroke parameter of the slider of the post-process press; obtaining the feed side stamping passability parameter and the discharge side stamping passability parameter of the modeling surface under the maximum relative height difference; based on the feed side stamping passability parameter, the discharge side stamping passability parameter and the maximum stroke parameter of the slider, determining the test result of the part stamping passability, and the test result is used to characterize whether the part meets the part stamping passability. The method for detecting the passability of part stamping of the present application is used to detect the passability of part stamping.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of vehicle manufacturing technology, and in particular to a method for detecting the passability of a part stamping. Background Art

[0002] In the styling design stage of automobile R&D, the initial styling surface (Concept A Surface, CAS) needs to be split according to different functions. After the split parts, it is also necessary to consider whether the manufacturability meets the requirements. One very important point is that the split sheet metal needs to meet the part passability of the stamping production line. In the styling design stage, according to the early manufacturing division of labor, it has been clarified which production line will be produced, but this stage is too close to the early stage, there is no mold structure diagram, and it is impossible to judge whether the part meets the production line passability according to the traditional method of judging the part passability; and because some production lines are relatively old and have no interference curves, it is also impossible to judge the part passability through interference curves and mold diagrams.

[0003] In the related technology, during the automobile styling design stage, one can only refer to parts from previous projects and impose restrictions on the segmentation of parts. However, referring to the dimensions of previous projects can no longer effectively meet the segmentation requirements of existing automobile styling designs, and it is easy for parts to fail to meet the passability of the stamping production line. Summary of the invention

[0004] The embodiment of the present application provides a method for detecting the punching passability of a part, which can solve the problem that the punching passability of a part is difficult to detect in the early stage of part modeling design.

[0005] The embodiment of the present application provides a part stamping passability detection method, which is applied to the stamping passability detection in the early stage of part modeling design. The part stamping passability detection method comprises: obtaining the maximum relative height difference of the modeling surface of the part along the stamping direction, obtaining the maximum stroke parameter of the slider of the post-process press, and obtaining the feed side stamping passability parameter and the discharge side stamping passability parameter of the modeling surface, wherein the feed side stamping passability parameter at least includes the feed side relative height difference parameter of the part, and the discharge side stamping passability parameter at least includes the discharge side relative height difference parameter of the part; wherein the feed side passability parameter and the discharge side stamping passability parameter are both passability parameters of the modeling surface of the part when it needs to pass through the press when its relative height difference is at its maximum value;

[0006] Based on the punching passability parameters of the feed side, the punching passability parameters of the discharge side and the maximum stroke parameters of the slider, the test results of the part punching passability are determined, and the test results are used to indicate whether the part meets the part punching passability.

[0007] Specifically, the type of parts is not limited, such as the body side, fender, engine cover and back door, etc. For example, taking the side panel parts as an example, in the early stage of automobile styling design, the side panel shaping surface is designed, and the relative height difference parameter values ​​of the side panel parts are extracted, such as the parameter values ​​of the relative height difference in different directions along the side panel. Usually, through the analysis of the side panel part process, when the side panel stamping direction is along the vehicle body height direction, the side panel part has the worst passability. Therefore, when the side panel part can pass through the press production line along the vehicle body height direction, the side panel part can also meet the passability of the press production line along other directions, that is, when extracting the relative height difference parameter values ​​of the side panel parts in multiple different directions, at least the maximum relative height difference of the shaping surface of the part in the stamping direction in the relative height difference along the stamping direction should be included. Obtain the maximum stroke parameter of the slider of the post-process press. Here, the maximum stroke parameter of the slider of the press refers to the distance the slider moves from the bottom dead center to the top dead center during the stamping production process of the press. Here, when a certain press production line is selected, that is, the maximum stroke parameter of the slider of the press is usually unchanged. Therefore, it is necessary to obtain a variety of stamping passability parameters of the part in the early stage of part modeling design to compare with the maximum stroke parameter of the slider of the press, so as to determine whether the parts in the early stage of modeling design can meet the passability of the press stamping production line.

[0008] Therefore, it is necessary to further obtain the punching passability parameters of the feed side and the discharge side when the relative height difference of the modeling surface of the part along the punching direction is at the maximum value. For example, taking the side panel part as an example, when the side panel part passes through the press production line along its vehicle body height direction, that is, when the relative height difference of the side panel part is at the maximum value, the punching passability parameters of the feed side need to be obtained, wherein the punching passability parameters of the feed side at least include the relative height difference parameters of the feed side of the part; correspondingly, the punching passability parameters of the discharge side at least include the relative height difference parameters of the discharge side of the part. Among them, the punching passability parameters of the feed side and the punching passability parameters of the discharge side are both the passability parameters when the modeling surface of the part needs to pass through the press when its relative height difference is at the maximum value.

[0009] Here, at least the relative height difference parameter of the feeding side of the part specifically means that when the part passes through the press on the feeding side, it is usually necessary to automatically grab the part through a grabbing component such as a robot arm in order to improve the degree of automation of the stamping production line. In this case, since the grabbing components such as the robot arm need to occupy the stamping space of the press, the relative height difference parameter of the grabbing components such as the robot arm needs to be considered. In addition, considering that there is an interference risk area when the part is fed, it is usually necessary to design a safety margin parameter for the part to be stamped through. In this way, even if the stamping production line does not consider the use of grabbing components such as a robot arm to grab the part and does not design the safety margin parameter, in order to make the part pass through the stamping production line on the feeding side, it is necessary to at least include the relative height difference parameter of the feeding side of the part, and make it not greater than the maximum stroke parameter of the slider, so as to achieve the minimum required condition for the part to pass through the stamping production line on the feeding side. Similarly, the discharge side also needs to at least include the relative height difference parameter of the discharge side of the part.

[0010] Among them, based on the above-mentioned feed side stamping passability parameters, discharge side stamping passability parameters and slider maximum stroke parameters, the test results of the part stamping passability are determined. Specifically, the feed side relative height difference parameters of the part included in the feed side stamping passability parameters and other possible feed side stamping passability parameters are summed and compared with the slider maximum stroke parameters of the press. For example, if the sum of the feed side stamping passability parameters is not greater than the slider maximum stroke parameter, and the sum of the discharge side stamping passability parameters is not greater than the slider maximum stroke parameter, it can be determined that the part can pass through the stamping production line. If at least one of the parameters on the feed side or the discharge side is greater than the slider maximum stroke parameter, it can be determined that the part cannot pass through the stamping production line. Therefore, the test results can be used to characterize whether the part meets the part stamping passability. Through the above-mentioned detection method, it can be achieved that even if the stamping production line is old and has no interference curves, and there are no mold drawings in the early modeling stage, it can still be detected whether the part meets the press stamping passability, so that the detection method can be applied to more scenarios.

[0011] In a possible implementation of the present application, the punching passability parameters on the feed side and the punching passability parameters on the discharge side both include the punch stroke parameters, the relative height difference parameters of the grabbing assembly along the part punching direction, and the safety margin parameters. Among them, in order to improve the degree of automation of the stamping production line, it is usually necessary to automatically grab the parts through the grabbing assembly. In this case, since the grabbing assembly needs to occupy the stamping space of the press along the stamping direction, it is often necessary to consider the relative height difference parameters of the grabbing assembly. In addition, considering that there is an interference risk area when feeding parts, it is usually necessary to design the safety margin parameters for the parts to be punched through. In this way, it can be ensured that the parts designed in the early stage of the modeling design can pass through the stamping production line without reducing the stamping efficiency.

[0012] In a possible implementation of the present application, both the punching passability parameters on the feed side and the punching passability parameters on the discharge side also include a reserved safety value, which is used to reserve a safety margin for adjusting the structural surface of the press later. For example, a safety margin is reserved for arranging an inclined wedge, a material stopper rod, and increasing the structural surface of the part in the later stage of the press to meet the punching passability of the part in various processes.

[0013] In a possible implementation of the present application, based on the feed side stamping passability parameters, the discharge side stamping passability parameters and the maximum stroke parameters of the slider, the step of determining the test result of the part stamping passability includes: summing the punch stroke parameters, the safety margin parameters, the relative height difference parameters of the gripping assembly, the feed side relative height difference parameters, the punch feed side height parameters and the reserved safety value to obtain the feed side stamping passability parameters and; summing the punch stroke parameters, the safety margin parameters, the relative height difference parameters of the gripping assembly, the discharge side relative height difference parameters, The height parameter of the punch feed side and the reserved safety value are summed to obtain the stamping passability parameters and of the discharge side; it is determined whether the stamping passability parameters and of the feed side and the stamping passability parameters and of the discharge side are less than the maximum stroke parameter of the slider; if the stamping passability parameters and of the feed side and the stamping passability parameters and of the discharge side are both less than the maximum stroke parameter of the slider, it is determined that the part meets the stamping passability; if at least one of the stamping passability parameters and of the feed side and the stamping passability parameters and of the discharge side is greater than or equal to the maximum stroke parameter of the slider, it is determined that the part does not meet the stamping passability.

[0014] In a possible implementation of the present application, after the step of determining the test result of the part's stamping passability based on the feed side stamping passability parameters, the discharge side stamping passability parameters and the slider maximum stroke parameters, it also includes: if the part does not meet the stamping passability, the part's modeling surface is reconstructed, and the parameter value of the relative height difference of the part is re-extracted. Among them, the part does not meet the stamping passability, including the part on the feed side and / or the discharge side does not meet the part's stamping passability. When this happens, the part's modeling surface can be reconstructed to adapt to the passability of the stamping production line. At this time, the adjusted part does not necessarily meet the stamping passability, and the parameter value of the relative height difference of the part needs to be re-extracted and the steps of the above part stamping passability detection method are repeated until the designed part meets the part's stamping passability.

[0015] In a possible implementation of the present application, the relative height difference parameter on the feed side and the relative height difference parameter on the discharge side are both less than or equal to the maximum relative height difference. Among them, the relative height difference parameter on the feed side and the relative height difference parameter on the discharge side are the relative height difference parameters corresponding to the worst passability of the part on the feed side and the discharge side, that is, the situation at the maximum relative height difference of the modeling surface of the part along the stamping direction. Here, the reason why the relative height difference parameters corresponding to the worst passability of the part on the feed side and the discharge side are used as the relative height difference parameters on the feed side and the relative height difference parameters on the discharge side, respectively, is because if the part meets the stamping passability under the worst passability condition, then when the part changes its position angle relative to the press along the stamping direction, it will usually also meet the stamping passability.

[0016] In a possible implementation of the present application, the safety margin parameter includes a first safety margin parameter and a second safety margin parameter, wherein the interference risk area between the gripping assembly and the upper die seat of the press has a first safety margin so that the gripping assembly avoids the upper die seat; the interference risk area between the end of the part close to the lower die seat of the press along the stamping direction and the lower die seat has a second safety margin so that the part avoids the lower die seat. Here, the design of the first safety margin and the second safety margin can further ensure that the part shape designed in the initial stage of shape can meet the part stamping passability. In addition, the first safety margin parameter and the second safety margin parameter may be equal or unequal, and are not specifically limited.

[0017] In a possible implementation of the present application, along the stamping direction of the part, the height difference between the upper end face of the gripping assembly and the feed interference risk point on the upper die seat, and the height difference between the upper end face of the gripping assembly and the discharge interference risk point on the upper die seat are the first safety margin parameters. In this regard, since the gripping and releasing action of the gripping assembly in the process of gripping and releasing the part in the stamping space is inevitably deviated from the theoretical design result, the above design can provide a margin for the movement deviation of the gripping assembly, so that the gripping assembly can avoid bumping against the press in the easy interference risk area, thereby affecting the passability of the part stamping.

[0018] In a possible implementation of the present application, the step of determining the test result of the part stamping passability based on the feed side stamping passability parameters, the discharge side stamping passability parameters and the maximum stroke parameters of the slider also includes: creating a part feed side stamping passability sketch, and along the part stamping direction, between the press slider and the press bed on the part feed side stamping passability sketch, obtaining and marking the punch stroke parameters, the first safety margin parameters, the grab assembly relative height difference parameters, the feed side relative height difference parameters, the punch feed side height parameters, and the second safety margin parameters in sequence from top to bottom, and summing all the above parameters obtained with the reserved safety value to obtain the feed side stamping passability parameters and; if the feed side stamping passability parameters and the feed side stamping passability parameters are less than the slider maximum stroke parameters, it is determined that the part meets the stamping passability on the feed side; if the feed side stamping passability parameters and the feed side stamping passability parameters are greater than or equal to the slider maximum stroke parameters, it is determined that the part does not meet the stamping passability. In this way, the created feed side stamping passability sketch can be used to more intuitively analyze whether the part meets the passability requirements, and it can also be convenient to analyze the risk points of easy interference based on the part shape, and configure the feed side stamping passability parameters and the discharge side stamping passability parameters.

[0019] In a possible implementation of the present application, if the feed side stamping passability parameter is less than the slider maximum stroke parameter, then the step of determining that the part meets the stamping passability on the feed side also includes: creating a part discharge side stamping passability sketch, and along the part stamping direction, between the press slider and the press bed on the part discharge side stamping passability sketch, obtaining and marking the punch stroke parameter, the first safety margin parameter, the grab assembly relative height difference parameter, the discharge side relative height difference parameter, the punch feed side height parameter, and the second safety margin parameter in sequence from top to bottom, and summing all the above-obtained parameters with the reserved safety value to obtain the discharge side stamping passability parameter and; if the discharge side stamping passability parameter and are less than the slider maximum stroke parameter, it is determined that the part meets the stamping passability; if the discharge side stamping passability parameter and are greater than or equal to the slider maximum stroke parameter, it is determined that the part does not meet the stamping passability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A front view of a vehicle provided in an embodiment of the present application;

[0021] Figure 2 A top view of a vehicle provided in an embodiment of the present application;

[0022] Figure 3 A method provided in the embodiment of the present application Figure 1 and Figure 2 AA section view of the vehicle;

[0023] Figure 4A punching passability sketch of a feed-side body side panel part provided in an embodiment of the present application;

[0024] Figure 5 A stamping passability sketch of a body side panel part on the discharge side provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of a method for detecting the passability of a part stamping provided in an embodiment of the present application Figure 1 ;

[0026] Figure 7 A schematic diagram of a method for detecting the passability of a part stamping provided in an embodiment of the present application Figure 2 ;

[0027] Figure 8 A schematic diagram of a method for detecting the passability of a part stamping provided in an embodiment of the present application Figure 3 ;

[0028] Fig. 9 A schematic diagram of a method for detecting the passability of a part stamping provided in an embodiment of the present application Figure 4 .

[0029] Reference numerals:

[0030] 1-Press 1; 11-Press slider; 12-Presser; 13-Press bed; 14-Upper die base; 15-Lower die base; 2-Grabbing assembly; 3-Side enclosure; B-Feeding interference risk point; C-Discharging interference risk point; H1-Presser stroke parameter; H2-Grabbing assembly relative height difference parameter; H3-Feeding side relative height difference parameter; H4-Feeding side height of punch; H51-First safety margin parameter; H52-Second safety margin parameter; H6-Discharging side relative height difference parameter; H7-Slider maximum stroke parameter. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0032] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0033] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0034] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0035] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0036] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0037] With the continuous expansion of production and sales in the automobile industry, major automobile manufacturers are constantly demanding to improve production efficiency on the production line. Automated production, as the most effective means to improve production efficiency, has developed on a large scale. Stamping is the first process in automobile production, and the development speed of stamping automation is also very rapid. In recent years, the popularity of automated stamping production lines in mainstream domestic automobile factories has been very high, and the beat is getting faster and faster.

[0038] At present, the typical forms of stamping automation are mainly divided into two forms: robot form and manipulator form. The principle is the same, that is, robots or manipulators are used instead of manual handling of stamping sheets. For example, taking the manipulator form as an example, the main automation equipment of the entire stamping automatic line is divided into: loading trolley, destacking manipulator, belt conveyor, centering system, loading manipulator, conveying manipulator, unloading manipulator, unloading belt conveyor, etc. The main workflow of its automated stamping production line is: workshop workers place the blanks on the loading trolley with a crane or forklift, and place the mold on the mobile workbench of the press with a crane. The loading trolley enters the production line, the mobile workbench with the mold enters the press, and the production line starts. The waste hopper on the side of each press is opened, and the waste line runs automatically. The destacking robot grabs a piece of material from the loading trolley and sends it to the belt conveyor. The piece of material then enters the cleaning machine and oiling machine for cleaning and oiling, and then enters the centering device for centering. The loading robot grabs the piece and sends it to the first press for stamping and forming. After that, the conveying robot sends the piece of material to the press of each process to complete the specified stamping work. Finally, the unloading robot places the finished stamping parts on the unloading belt conveyor, and the pieces are manually inspected and finally loaded into the basket.

[0039] In the stamping production process, the press is responsible for the stamping production of parts, the automation equipment is responsible for transporting parts from the press room, and the mold is responsible for producing the sheet metal into the required shape. During the tooling period, it is installed between the workbench and the slider of the press. In order to smoothly transport the stamped parts from one press to the next, its passability must be fully considered. The content related to passability involves the stroke of the press slider, the reference surface height of the mold, and the operating space of the automation equipment. Usually, in stamping automation production, the number and type of press equipment in the production workshop are limited. When a certain press is designated as a stamping press, the maximum stroke of its slider is determined. In addition, in stamping automation production, the manipulator needs to smoothly transport the stamping parts from one press to the next. The space in the press that the manipulator needs to occupy is usually different for different stamping parts due to their different shapes. The space occupied by the manipulator usually refers to the space between the upper and lower limits required for its motion curve when dealing with each part.

[0040] In the early stage of part modeling design, based on the early manufacturing division of labor, it has been clarified which production line will be produced. However, this stage is too early and there is no mold structure diagram. It is impossible to judge whether the part meets the production line passability according to the traditional method of judging the passability of the part. Moreover, because some production lines are relatively old and have no interference curves, it is impossible to judge the passability of the part by combining the interference curve with the mold diagram.

[0041] In previous projects, there was no effective method to provide guidance on the passing of parts segmentation at this stage. Often, only previous project parts could be used to set limits on parts segmentation. With the current industry trend of increasingly exaggerated shapes, referring to previous project dimensions can no longer effectively meet the existing shape's segmentation needs. It is easy for parts designed in the early stages to fail to meet the requirements of the stamping production line.

[0042] To this end, the present application provides a method for detecting the passability of stamping of parts, which is applied to the detection of the passability of stamping in the early stage of part modeling design. Figure 4 , Figure 5 and Figure 6 The part stamping passability detection method comprises the following steps:

[0043] Step S100: obtaining the maximum relative height difference of the modeling surface of the part along the stamping direction;

[0044] Step S200: obtaining the maximum stroke parameter of the slider of the subsequent process press;

[0045] Step S300: Obtaining a feed side punching passability parameter and a discharge side punching passability parameter of the modeling surface, wherein the feed side punching passability parameter at least includes a feed side relative height difference parameter of the modeling surface of the part, and the discharge side punching passability parameter at least includes a discharge side relative height difference parameter of the modeling surface of the part; wherein the feed side passability parameter and the discharge side punching passability parameter are both passability parameters of the modeling surface of the part when it needs to pass through the press at the maximum value of the relative height difference;

[0046] Step S400: Based on the punching passability parameters on the feeding side, the punching passability parameters on the discharging side and the maximum stroke parameters of the slider, a test result of the punching passability of the part is determined, and the test result is used to indicate whether the part meets the punching passability of the part.

[0047] Among them, the type of parts is not limited, such as the side panel, fender, engine cover and back door, etc. Since the possibility of the side panel passability problem is relatively high, in the embodiments of the present application, the side panel 3 is used as an embodiment for description unless otherwise specified. Specifically, through step S100, in the early stage of automobile styling design, the side panel 3 modeling surface is designed, and the relative height difference parameter value of the side panel 3 part is extracted, for example, the parameter value of the relative height difference along different directions of the side panel 3. Generally, through the process analysis of the side panel 3 part, when the stamping direction of the side panel 3 is along the height direction of the vehicle body, the passability of the side panel 3 part is the worst. Therefore, when the side panel 3 part can pass through the press 1 production line along the height direction of the vehicle body, the side panel 3 part can also meet the passability of the press 1 production line along other directions, that is, when extracting the relative height difference parameter values ​​of the side panel 3 part in multiple different directions, at least the maximum relative height difference in the relative height difference of the modeling surface of the part in the stamping direction should be included. Through step S200, the maximum stroke parameter H7 of the slider of the post-process press 1 is obtained. Here, the maximum stroke parameter H7 of the slider of the press 1 refers to the distance that the slider moves from the bottom dead center to the top dead center of the press during the stamping production process. Here, when a certain press 1 production line is selected, that is, the maximum stroke parameter H7 of the slider of the press 1 is usually unchanged. Therefore, it is necessary to obtain a variety of stamping passability parameters of the part in the early stage of part modeling design to compare with the maximum stroke parameter H7 of the slider of the press 1, so as to determine whether the part in the early stage of modeling design can meet the passability of the stamping production line of the press 1.

[0048] Therefore, it is necessary to further obtain the punching passability parameters of the feed side and the discharge side when the relative height difference of the modeling surface of the part along the punching direction is the maximum value through step S300, such as, Figure 1 , Figure 2 and Figure 3Taking the side panel 3 part as an example, when the side panel 3 part passes through the press production line along the height direction of the vehicle body, that is, when the relative height difference of the side panel 3 part is at the maximum relative height difference, the feed side stamping passability parameters need to be obtained, wherein the feed side stamping passability parameters at least include the feed side relative height difference parameter H3 of the part; correspondingly, the discharge side stamping passability parameters at least include the discharge side relative height difference parameter H6 of the part. Here, at least the relative height difference parameter H3 of the part on the feeding side specifically means that when the part passes through the press 1 on the feeding side, it is usually necessary to automatically grab the part through a grabbing component 2 such as a robot arm in order to improve the degree of automation of the stamping production line. In this case, since the grabbing component 2 such as a robot arm needs to occupy the stamping space of the press 1, the relative height difference parameter H2 of the grabbing component 2 such as the robot arm needs to be considered. In addition, considering that there is an interference risk area when the part is fed, it is usually necessary to design a safety margin parameter for the part to be stamped through. In this way, even if the stamping production line does not consider the use of a grabbing component 2 such as a robot arm to grab the part and does not design a safety margin parameter, in order to make the part pass through the stamping production line on the feeding side, at least the relative height difference parameter H3 of the part on the feeding side must be included, and it must be smaller than the maximum stroke parameter H7 of the slider, so as to meet the minimum required conditions for the part to pass through the stamping production line on the feeding side. Similarly, the discharge side also needs to include at least the relative height difference parameter H6 of the discharge side of the part.

[0049] Among them, through step S400, based on the above feed side stamping passability parameters, discharge side stamping passability parameters and slider maximum stroke parameter H7, the test result of the part stamping passability is determined, specifically, the feed side relative height difference parameter H3 of the part included in the feed side stamping passability parameters and other possible feed side stamping passability parameters are summed and compared with the slider maximum stroke parameter H7 of the press 1. For example, if the sum of the feed side stamping passability parameters is less than the slider maximum stroke parameter H7, and the sum of the discharge side stamping passability parameters is also less than the slider maximum stroke parameter H7, it can be determined that the part can pass the stamping production line. If at least one of the sum of all the parameters on the feed side or the sum of all the parameters on the discharge side is greater than the slider maximum stroke parameter H7, it can be determined that the part cannot pass the stamping production line. Therefore, the test result can be used to characterize whether the part meets the part stamping passability. Through the above detection method, it can be achieved that even if the stamping production line is old and has no interference curves, and there is no mold drawing in the early modeling stage, it can still be detected whether the part meets the stamping passability of the press 1.

[0050] In some embodiments, the punching passability parameters on the feed side and the punching passability parameters on the discharge side include the punch stroke parameter H1, the relative height difference parameter H2 of the grab assembly 2 along the part punching direction, and the safety margin parameter. Among them, in order to improve the degree of automation of the stamping production line, it is usually necessary to automatically grab the parts through the grab assembly 2. In this case, since the grab assembly 2 needs to occupy the stamping space of the press 1 along the stamping direction, the relative height difference parameter H2 of the grab assembly 2 is often also considered. In addition, considering that there is an interference risk area when the parts are fed, it is usually necessary to design the safety margin parameters for the parts to be punched through. In this way, it can be ensured that the parts designed in the early stage of the modeling design can pass through the stamping production line without reducing the stamping efficiency. Here, the punch stroke parameter H1 can refer to the gap between the punch plate and the punch fixing plate, which is also usually called the upper mold activity. Its size is related to the product and the mold structure. In the embodiment of the present application, when the press 1 is constant, the punch stroke parameter H1 can also be determined.

[0051] In some embodiments, reference Figure 4 and Figure 5 The punching passability parameters on the feeding side and the punching passability parameters on the discharging side also include a reserved safety value, which is used to reserve a safety margin for the press 1 to adjust the part structure surface later. For example, the reserved safety value is used to reserve a safety margin for the press to adjust the wedge, the stopper rod, and the increase of the part structure surface later. This satisfies the part punching passability under various processes.

[0052] Reference Figure 4 , Figure 5 and Figure 7 , step S400 includes step S401 and step S402, wherein step S401: summing up the punch stroke parameter H1, the safety margin parameter, the relative height difference parameter H2 of the gripping component 2, the relative height difference parameter H3 of the feed side, the punch feed side height parameter H4 and the reserved safety value to obtain the punching passability parameter and of the feed side; summing up the punch stroke parameter H1, the safety margin parameter, the relative height difference parameter H2 of the gripping component 2, the relative height difference parameter H6 of the discharge side, the punch feed side height parameter H4 and the reserved safety value to obtain the punching passability parameter and of the discharge side. Step S402: judging whether the punching passability parameter and of the feed side and the punching passability parameter of the discharge side are both less than the maximum stroke parameter H7 of the slider. Among them, if the stamping passability parameters of the feed side and the stamping passability parameters of the discharge side are both less than the maximum stroke parameter of the slider H7, it is determined that the part meets the stamping passability; if at least one of the stamping passability parameters of the feed side and the stamping passability parameters of the discharge side is greater than or equal to the maximum stroke parameter of the slider H7, it is determined that the part does not meet the stamping passability.

[0053] Here, it should be noted that, for example, on the feed side, in addition to the presser stroke parameter H1, the safety margin parameter, the grabbing assembly relative height difference parameter H2, the feed side relative height difference parameter H3, the punch feed side height H4 parameter and the reserved safety value, other parameter values ​​can also be added based on the actual needs of the part modeling surface, without specific limitation.

[0054] In some embodiments, reference Figure 4 , Figure 5 and Fig. 9 After step S402, if the part does not meet the punching passability, proceed to step S001: reconstruct the part's modeling surface; and re-extract the parameter value of the relative height difference of the part. Among them, the part does not meet the punching passability, including the part does not meet the part punching passability on the feeding side and / or the discharging side. When this happens, the part's modeling surface can be reconstructed to adapt to the passability of the stamping production line. At this time, the adjusted part does not necessarily meet the punching passability, and the parameter value of the relative height difference of the part needs to be re-extracted and steps S100 to S400 are repeated until the designed part meets the part punching passability.

[0055] In some embodiments, the relative height difference parameter H3 on the feed side and the relative height difference parameter value H6 on the discharge side are both less than or equal to the maximum relative height difference. The determination of the relative height difference parameter H3 on the feed side and the relative height difference parameter value H6 on the discharge side can be determined according to the conditions when different molding surfaces of the parts pass through the press, and is not specifically limited. It is only necessary that the relative height difference parameter H3 on the feed side and the relative height difference parameter value H6 on the discharge side are both less than or equal to the maximum relative height difference. For example, for example, refer to Figure 4 and Figure 5 , taking the case where the molding surface of the side enclosure 3 needs to pass through the press when the relative height difference is the maximum along the stamping direction, the relative height difference parameter H3 on the feed side is equal to the relative height difference maximum, and the relative height difference parameter H6 on the discharge side is less than the relative height difference maximum. Here, the relative height difference parameters corresponding to the worst passability of the part on the feed side and the discharge side are used as the relative height difference parameter H3 on the feed side and the relative height difference parameter H6 on the discharge side, respectively, because in this case, if the part meets the stamping passability, then when the part changes its position angle relative to the press 1 along the stamping direction, it will usually also meet the stamping passability.

[0056] Continue, refer to Figure 4 and Figure 5, the safety margin parameters include a first safety margin parameter H51 and a second safety margin parameter H52, wherein the interference risk area between the grab assembly 2 and the upper die seat 14 of the press 1 has a first safety margin, so that the grab assembly 2 avoids the upper die seat 14; the interference risk area between the end of the part close to the lower die seat 15 of the press 1 along the stamping direction and the lower die seat 15 has a second safety margin, so that the part avoids the lower die seat 15. Here, the design of the first safety margin and the second safety margin can further ensure that the parts designed in the initial stage of modeling can meet the part stamping passability. In addition, the first safety margin parameter H51 and the second safety margin parameter H52 can be equal or unequal without specific limitation.

[0057] Further, refer to Figure 4 and Figure 5 , along the part stamping direction, the height difference between the upper end surface of the gripping assembly 2 and the feed interference risk point B on the upper die holder 14, and the height difference between the upper end surface of the gripping assembly 2 and the discharge interference risk point C on the upper die holder 14 are the first safety margin parameter H51. Among them, since the gripping assembly 2 will inevitably deviate from the theoretical design result in the process of gripping and placing parts in the stamping space, the above design can provide a margin for the movement deviation of the gripping assembly 2, so that the gripping assembly 2 can avoid bumping against the press 1 in the easy interference risk area, thereby affecting the part stamping passability.

[0058] In some embodiments, reference Figure 4 , Figure 5 and Figure 8 , step S401 also includes step S4011 and step S4012, wherein step S4011: create a part feed side stamping passability sketch, and along the part stamping direction, between the press 1 slider 11 and the press bed 13 on the part feed side stamping passability sketch, obtain and mark the punch stroke parameter H1, the first safety margin parameter H51, the relative height difference parameter H2 of the gripping component 2, the relative height difference parameter H3 of the feed side, the punch feed side height parameter H4, the second safety margin parameter H52 from top to bottom, and sum all the above parameters obtained with the reserved safety value to obtain the feed side stamping passability parameter and. Among them, if the feed side stamping passability parameter and is less than the slider maximum stroke parameter H7, it is determined that the part meets the stamping passability on the feed side; if the feed side stamping passability parameter and is greater than or equal to the slider maximum stroke parameter H7, it is determined that the part does not meet the stamping passability. In this way, the created feed side stamping passability sketch can be used to more intuitively analyze whether the part meets the passability requirements, and it is convenient to analyze the risk points of easy interference based on the part shape, and configure the feed side stamping passability parameters and the discharge side stamping passability parameters.

[0059] If the feed side stamping passability parameter is not greater than the slider maximum stroke parameter H7, then after step S4011, step S4012 is performed, and step S4012 includes creating a part discharge side stamping passability sketch, and along the part stamping direction, between the press slider 11 and the press bed 13 of the part discharge side passability sketch, from top to bottom, the punch stroke parameter H1, the first safety margin parameter H51, the grab component 2 relative height difference parameter H2, the discharge side relative height difference parameter H6, the punch feed side height H4 parameter, the second safety margin parameter H52 are obtained and marked, and all the above parameters obtained are summed with the reserved safety value to obtain the discharge side stamping passability parameter and; wherein, if the discharge side stamping passability parameter and is less than the slider maximum stroke parameter H7, it is determined that the part meets the stamping passability; if the discharge side stamping passability parameter and is greater than or equal to the slider maximum stroke parameter H7, it is determined that the part does not meet the stamping passability.

[0060] In addition, in some embodiments, taking the side panel 3 parts of the early stage of automobile styling design as an example, referring to Figure 4 , Figure 5 and Fig. 9 , combined with step S100, first extract the maximum value of the relative height difference of the side panel 3 in the stamping direction, that is, extract the section with the deepest relative height difference of the side panel 3, and refer to Figure 3 As shown. Combined with step S200, determine the selected stamping production line, and obtain the maximum stroke parameters of the slider 11 of the subsequent process press, for example, the slider maximum stroke parameter H7 is 1100mm. Combined with step S300, obtain the punch stroke parameter H1 of 70mm, the grab assembly 2 relative height difference parameter H2 of 700mm, the feed side relative height difference of the side enclosure 3 of 1100mm, the punch feed side height H4 of 1100mm, the discharge side relative height difference of the side enclosure 3 of 1100mm, the first safety margin parameter H51 and the second safety margin parameter H52 are both 30mm, and the reserved safety value is 50mm. Continuing, combined with step S400, create the stamping passability sketches of the feed side and discharge side of the side enclosure 3 respectively, as shown Figure 4 and Figure 5As shown, the passability of the post-process press 1 is calculated on the feed side and the discharge side. Specifically, in combination with step S4011 and step S4012, the feed side press stroke parameter H1, the first safety margin parameter H51, the relative height difference parameter H2 of the gripping component 2, the relative height difference parameter H3 of the feed side, the second safety margin parameter H52, the punch feed side height H4 and the reserved safety value are summed, and the calculation formula for the passability of the punching of the part detected on the feed side is H1+H51+H2+H3+H52+H4+a, that is, 70+30+250+440+30+230+50=1100mm, where a represents the reserved safety value. At this time, the sum of the parameters on the feed side is not greater than H7 (1100mm), that is, the part meets the passability on the feed side. Continuing, the discharge side presser stroke parameter H1, the first safety margin parameter H51, the relative height difference parameter H2 of the gripping component 2, the relative height difference parameter H6 of the discharge side, the second safety margin parameter H52, the punch feed side height H4 and the reserved safety value a are summed. Here, correspondingly, the calculation formula for the discharge side is H1+H51+H2+H6+H52+H4, combined with the example parameter values, and summing up the parameter values, 70+30+250+230+30+230+50=890mm<1100mm, that is, the side 3 parts meet the passability requirements. On the contrary, if the sum of the parameters of the feed side and the discharge side is greater than 1100mm on at least one side, the part does not meet the punching passability.

[0061] It should be noted that the above parameter values ​​are exemplary reference values ​​for a body side panel 3 part, i.e., a body side panel 3 part is used as an embodiment to check whether it can pass through a stamping production line. For example, when judging the stamping passability of other parts on the press 1, the relative height difference parameter H6 value of the feed side and the discharge side of the part and the height H4 of the punch feed side can be adjusted, wherein the presser stroke parameter H1, the relative height difference parameter H2 of the gripper assembly 2, and the reserved safety value a can remain unchanged.

[0062] The serial numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for detecting the passability of a part stamping, characterized in that: Applied to the stamping passability test in the early stage of part modeling design, including: Obtain the maximum relative height difference of the modeling surface of the part along the stamping direction; Get the maximum stroke parameters of the slider of the post-process press; Obtaining a feed side punching passability parameter and a discharge side punching passability parameter of the modeling surface, wherein the feed side punching passability parameter at least includes a feed side relative height difference parameter of the modeling surface of the part, and the discharge side punching passability parameter at least includes a discharge side relative height difference parameter of the modeling surface of the part; wherein the feed side passability parameter and the discharge side punching passability parameter are both passability parameters of the modeling surface of the part when the relative height difference is at its maximum value and needs to pass through the press; Based on the feed side stamping passability parameters, the discharge side stamping passability parameters and the slider maximum stroke parameters, the test result of the part stamping passability is determined, and the test result is used to characterize whether the part meets the part stamping passability; the feed side stamping passability parameters and the discharge side stamping passability parameters both include a punch stroke parameter, a relative height difference parameter of a grab assembly along the part stamping direction and a safety margin parameter; the feed side stamping passability parameters and the discharge side stamping passability parameters both also include a reserved safety value, and the reserved safety value is used to reserve a safety amount for adjusting the part structural surface of the press later; the step of determining the test result of the part stamping passability based on the feed side stamping passability parameters, the discharge side stamping passability parameters and the slider maximum stroke parameters includes: The stroke parameter of the press, the safety margin parameter, the relative height difference parameter of the grab assembly, the relative height difference parameter of the feed side, the height parameter of the punch feed side and the reserved safety value are summed to obtain the feed side punching passability parameter and; The stroke parameter of the press, the safety margin parameter, the relative height difference parameter of the grab assembly, the relative height difference parameter of the discharge side, the height parameter of the punch feed side and the reserved safety value are summed to obtain the sum of the discharge side punching passability parameters; Determine whether the sum of the punching passability parameter on the feeding side and the sum of the punching passability parameter on the discharging side are less than the maximum stroke parameter of the slider; If the sum of the punching passability parameters on the feeding side and the sum of the punching passability parameters on the discharging side are both less than the maximum stroke parameter of the slider, it is determined that the part meets the punching passability requirements; If at least one of the sum of the feed side punching passability parameters and the sum of the discharge side punching passability parameters is greater than or equal to the maximum stroke parameter of the slider, it is determined that the part does not meet the punching passability requirements.

2. The method for detecting the passability of stamping parts according to claim 1, characterized in that: After the step of determining the test result of the part punching passability based on the feed side punching passability parameter, the discharge side punching passability parameter and the slider maximum stroke parameter, the step further includes: If the part does not meet the punching passability requirement, the modeling surface of the part is reconstructed, and the parameter value of the relative height difference of the part is re-extracted.

3. The method for detecting the passability of stamping parts according to claim 1, characterized in that: The relative height difference parameter on the feed side and the relative height difference parameter on the discharge side are both less than or equal to the maximum relative height difference value.

4. The method for detecting the passability of stamping of parts according to claim 1, characterized in that: The safety margin parameter includes a first safety margin parameter and a second safety margin parameter, wherein the interference risk area between the gripping assembly and the upper die seat of the press has a first safety margin so that the gripping assembly avoids the upper die seat; The interference risk zone between one end of the part close to the lower die seat of the press along the stamping direction and the lower die seat has a second safety margin so that the part avoids the lower die seat.

5. The method for detecting the passability of stamping of parts according to claim 4, characterized in that: Along the part stamping direction, the height difference between the upper end surface of the grabbing assembly and the feed interference risk point on the upper die base and the height difference between the upper end surface of the grabbing assembly and the discharge interference risk point on the upper die base are the first safety margin parameters.

6. The method for detecting the passability of stamping of parts according to claim 5, characterized in that: The step of determining the test result of the punching passability of the part based on the punching passability parameter of the feeding side, the punching passability parameter of the discharging side and the maximum stroke parameter of the slider further includes: Create a punching passability sketch for the part feed side, and along the part stamping direction, between the press slide and the press bed on the part feed side stamping passability sketch, obtain and mark the punch stroke parameter, the first safety margin parameter, the relative height difference parameter of the gripping component, the relative height difference parameter of the feed side, the height parameter of the punch feed side, and the second safety margin parameter in sequence from top to bottom, and sum all the obtained parameters with the reserved safety value to obtain the sum of the punching passability parameters for the feed side; If the sum of the punching passability parameter on the feed side is less than the maximum stroke parameter of the slider, it is determined that the part meets the punching passability on the feed side; If the sum of the feed side punching passability parameters is greater than or equal to the slider maximum stroke parameter, it is determined that the part does not meet the punching passability requirements.

7. The method for detecting the passability of stamping of parts according to claim 6, characterized in that: After the step of determining that the part meets the punching passability on the feed side if the punching passability parameter on the feed side is less than the maximum stroke parameter of the slider, the step further includes: Create a stamping passability sketch for the part discharge side, and along the stamping direction of the part, between the press slide and the press bed on the stamping passability sketch for the part discharge side, obtain and mark the punch stroke parameter, the first safety margin parameter, the relative height difference parameter of the gripping component, the relative height difference parameter of the discharge side, the height parameter of the punch feed side, and the second safety margin parameter in sequence from top to bottom, and sum all the above parameters obtained with the reserved safety value to obtain the sum of the stamping passability parameters for the discharge side; If the sum of the discharge side punching passability parameters is less than the slider maximum stroke parameter, it is determined that the part meets the punching passability requirements; If the sum of the discharge side punching passability parameters is greater than or equal to the slider maximum stroke parameter, it is determined that the part does not meet the punching passability requirements.

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