Evaluation method for rigidity of injection molded part, electronic equipment and storage medium

Abstract

The invention provides an evaluation method for rigidity of an injection molded part, electronic equipment, a storage medium and a computer program product, and the evaluation method comprises the steps: obtaining the size and quality data of the injection molded part, dividing the injection molded part into a plurality of sections according to a calculation interval in a direction vertical to the ground, and calculating the calculation interval according to the size of the injection molded part; the minimum axial inertia moment of the section of each section of the injection molding part is calculated, and the rigid deformation amount of each section of the injection molding part is calculated according to the minimum axial inertia moment and the mass of the section corresponding to each section of the injection molding part; and the maximum value of the rigidity deformation in all the sections of the injection molding part is obtained to serve as the maximum rigidity deformation, and the position of the section corresponding to the maximum rigidity deformation serves as the minimum rigidity position. The problem that in the prior art, when the bumper is manually or mechanically carried, the weakest position of the bumper cannot be confirmed, and carrying is difficult is solved, by means of the method, the weakest position of the injection molding part can be accurately found, and therefore the injection molding part is protected in the carrying process.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to a method for evaluating the rigidity of an injection molded part, an electronic device, a storage medium and a computer program product. Background Art

[0002] In the prior art, the design of the vehicle's bumper shows a trend of weakening in the middle of the bumper. There are two main reasons for the gradual weakening of the middle of the vehicle bumper: one is for aesthetics, weakening the middle part can make the overall lines of the vehicle smoother, in line with the aesthetic trend of modern automobile design; the second is from a functional perspective, the current automobile collision energy absorption design has energy absorption boxes and other structures on both sides of the front of the car taking on the main energy absorption tasks, the middle part of the bumper does not need to be as thick as in the past, and weakening the middle part also helps to reduce the weight of the vehicle, thereby achieving the effect of energy saving and emission reduction.

[0003] However, during the production process, the bumper is weakened in the middle, so when workers move the bumper, the bumper becomes soft. Fig.10 As shown, it is difficult to operate and has a great impact on the adaptability of the production line. For example, the transportation of bumpers on the production line requires the collaboration of two or more workers. The use of robots to transport bumpers in the stereoscopic warehouse requires the transformation of existing equipment, which requires a large capital investment. Moreover, when transporting bumpers, whether manual or robot, neither can accurately determine the weakest position of the bumper. Both are based on experience to determine the weakest position of the bumper for transportation. Therefore, it is necessary to accurately determine the weakest position of the bumper in order to reasonably set the clamping position during transportation and ensure that the bumper is intact during transportation. Summary of the invention

[0004] Based on the above problems, the present invention proposes a method for evaluating the rigidity of injection molded parts, an electronic device, a storage medium and a computer program product. The present invention solves the problem in the prior art that when a bumper is transported manually or by machine, it is difficult to transport it, which causes the inability to confirm its weakest position. By using the method for evaluating the rigidity of injection molded parts provided by the present invention, the weakest position of the bumper can be accurately found, and the clamping position during transportation can be set to protect it.

[0005] The present invention provides a method for evaluating the rigidity of an injection molded part, comprising:

[0006] Acquire the size and mass data of the injection molded part, and divide the injection molded part into multiple sections according to the calculated spacing in the direction perpendicular to the ground, wherein the calculated spacing is calculated according to the size of the injection molded part;

[0007] Calculating the minimum axial moment of inertia of the cross section of each section of the injection molded part, and calculating the rigid deformation of each section of the injection molded part according to the minimum axial moment of inertia and the mass of the cross section corresponding to each section of the injection molded part;

[0008] The maximum value of the rigid deformation in all the segments of the injection molded part is obtained as the maximum rigid deformation, and the position of the segment corresponding to the maximum rigid deformation is taken as the minimum rigidity position.

[0009] In addition, the calculation of the minimum axial moment of inertia of the cross section of each section of the injection molded part includes:

[0010] Constructing a coordinate system at the cross section of each section of the injection molded part, wherein the first coordinate axis of the coordinate system is set in the length direction of the injection molded part, the second coordinate axis is set in the gravity direction, and the third coordinate axis is set in the normal direction of the plane formed by the first coordinate axis and the second coordinate axis;

[0011] For each section of the injection molded part, the minimum axial moment of inertia of the cross section of each section of the injection molded part is calculated based on the distance from each differential region on the cross section to the third coordinate axis.

[0012] In addition, for each section of the injection molded part, based on the distance from each differential region on the cross section to the third coordinate axis, calculating the minimum axial moment of inertia of the cross section of each section of the injection molded part comprises:

[0013] The minimum axial moment of inertia of the cross section of the i-th section of the injection molded part is calculated as:

[0014] I i =MIN{∫f(x) 2 dA}

[0015] Where dA is the differential area on the cross section, f(x) is the distance from the differential area to the third coordinate axis, and I i is the minimum axial moment of inertia of the cross section of the i-th section of the injection molded part.

[0016] In addition, the calculating the rigid deformation of each section of the injection molded part according to the minimum axial inertia moment and mass of the cross section corresponding to each section of the injection molded part comprises:

[0017] For each section of the injection molded part, calculate the sum of the gravity from the starting section farthest from the injection molded part grabbing position to the section;

[0018] The rigid deformation of the cross section corresponding to each section of the injection molded part is calculated according to the sum of the gravity of each section, the distance from the deformed part of each section to the corresponding cross section, the elastic modulus of the material used for the injection molded part and the minimum axial moment of inertia of the cross section.

[0019] In addition, the gravity sum of each section is calculated according to the mass of each part, including:

[0020] Calculate the sum of the gravity of the i-th section of the injection molded part:

[0021]

[0022] Among them, m i is the mass of each section of the injection molded part, g is the acceleration due to gravity, F i is the sum of the gravity of the i-th section of the injection molded part.

[0023] In addition, the rigid deformation amount of the cross section corresponding to each section of the injection molded part is calculated according to the gravity of each section, the distance from the deformed part of each section to the corresponding cross section, the elastic modulus of the material used for the injection molded part, and the minimum axial moment of inertia of the cross section, including:

[0024] The rigid deformation of the cross section corresponding to the i-th section of the injection molded part is calculated as:

[0025]

[0026] Among them, F i is the weight of the injection molded part at the i-th section, L i is the distance from the center of gravity of the deformed part of the i-th section of the injection molded part to the grasping position of the injection molded part, l i is the distance from the section corresponding to the i-th segment to the gripping position of the injection molded part, E is the elastic modulus of the material used for the injection molded part, I i is the minimum axial moment of inertia of the cross section of the injection molded part, R i is the rigid deformation of the cross section corresponding to the i-th section of the injection molded part.

[0027] In addition, after the minimum rigidity position of the injection molded part is determined, the injection molded part is carried out according to the minimum rigidity position of the injection molded part.

[0028] The present invention also provides an electronic device, comprising:

[0029] at least one processor; and,

[0030] a memory communicatively connected to at least one of the processors; wherein,

[0031] The memory stores instructions that can be executed by at least one of the processors. The instructions are executed by at least one of the processors so that the at least one processor can perform any of the above-mentioned methods for evaluating the rigidity of injection molded parts.

[0032] The present invention provides a storage medium, wherein the storage medium stores computer instructions. When a computer executes the computer instructions, the storage medium is used to execute all steps of the method for evaluating the rigidity of an injection molded part as described in any one of the above.

[0033] The present invention provides a computer program product, comprising a computer program / instruction, characterized in that when the computer program / instruction is executed by a processor, the method for evaluating the rigidity of an injection molded part as described in any one of the above is implemented.

[0034] The present invention solves the problem in the prior art that when a bumper is transported manually or by machine, it is difficult to transport it, which is caused by the inability to confirm its weakest position. By adopting the rigidity evaluation method of the injection molded part provided by the present invention, the weakest position of the bumper can be accurately found, and the clamping position during transportation can be set to guide the protection during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A flow chart of a method for evaluating the rigidity of an injection molded part provided by one embodiment of the present invention;

[0036] Figure 2 A schematic diagram of a worker carrying a bumper provided by an embodiment of the present invention;

[0037] Figure 3 for Figure 2 Mathematical model construction diagram;

[0038] Figure 4 A schematic diagram of dividing an injection molded part provided by an embodiment of the present invention;

[0039] Figure 5 A schematic diagram of the axial moment of inertia of each section of the cross section of an injection molded part provided by an embodiment of the present invention;

[0040] Figure 6 A schematic diagram of calculating the rigid deformation of each section of an injection molded part provided by an embodiment of the present invention;

[0041] Figure 7 A schematic diagram of the value of the rigid deformation amount of each section of an injection molded part provided by one embodiment of the present invention;

[0042] Figure 8 for Figure 7 Schematic diagram of the maximum value of the medium rigid deformation;

[0043] Fig. 9 A schematic diagram of the hardware structure of an electronic device provided by an embodiment of the present invention;

[0044] Fig.10 It is a schematic diagram of manual handling of a bumper in the prior art. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below in conjunction with specific embodiments and drawings. It is only intended to elaborate on the specific embodiments of the present invention and does not impose any limitation on the present invention. The protection scope of the present invention shall be subject to the claims.

[0046] The present invention is further described in detail below in conjunction with specific embodiments and drawings. It is only intended to elaborate on the specific embodiments of the present invention and does not impose any limitation on the present invention. The protection scope of the present invention shall be subject to the claims.

[0047] Reference Figure 1 The present invention provides a method for evaluating the rigidity of an injection molded part, comprising:

[0048] Step S101, obtaining the size and mass data of the injection molded part, dividing the injection molded part into multiple sections according to the calculated spacing in the direction perpendicular to the ground, where the calculated spacing is calculated according to the size of the injection molded part;

[0049] Step S102, calculating the minimum axial moment of inertia of the cross section of each section of the injection molded part, and calculating the rigid deformation of each section of the injection molded part according to the minimum axial moment of inertia and mass of the cross section corresponding to each section of the injection molded part;

[0050] Step S103, obtaining the maximum value of the rigid deformation in all segments of the injection molded part as the maximum rigid deformation, and taking the position of the segment corresponding to the maximum rigid deformation as the minimum rigid position.

[0051] Reference Figure 2 and Figure 3 , Figure 3 for Figure 2 The mathematical model construction diagram of the invention is shown in Figure 1. In the process of proposing the scheme of the invention, the principle of the cantilever beam is cleverly combined with the product handling state. The injection molded part in the handling state can be approximated as a straight beam with a fixed grasping position. On this basis, a scheme is proposed to find the minimum rigidity position of the injection molded part based on the vertical distance calculation principle of the straight beam. The deformation calculation formula of the injection molded part is as follows:

[0052]

[0053] Among them, E is the elastic modulus of the material, I is the axial moment of inertia of the section, F is the gravity of the injection molded part, L is the distance from the center of gravity of the injection molded part to the clamping position of the injection molded part, y is the distance from the section to the clamping position of the injection molded part, and R is the deformation of the injection molded part at a distance y from the clamping position. Based on the above formula, it is further derived:

[0054]

[0055] Based on the above formula, the deformation R of the injection molded part based on the deformation of any cross section i can be calculated. i for:

[0056]

[0057] Where E is the elastic modulus of the material, I i is the axial moment of inertia of the cross section, F i is the gravity of the deformed part of the injection molded part, L i is the distance from the center of gravity of the deformed part of the injection molded part to the clamping position of the injection molded part, l i is the distance from section i to the clamping position of the injection molded part. From formula (2), the deformation of the weak section can be directly calculated, but in fact, F and I both change with the change of the injection molded part. The gravity and axial inertia moment of the deformed part at different positions are different, so directly calculating through formula (2) cannot achieve the purpose of accurately finding the minimum rigidity position of the injection molded part. Figure 2 The middle part of the injection molded part is simplified into a straight beam at the middle M. Figure 3 Point C in the middle is the weakest section.

[0058] Based on the above scheme, the present invention proposes an improvement. In step S101, the size and mass data of the injection molded part are first obtained, and the injection molded part is divided into multiple sections according to the calculated spacing in the direction perpendicular to the ground. The calculated spacing is calculated according to the size of the injection molded part; the injection molded part is divided into multiple sections to prepare for calculating the rigid deformation amount section by section. Optionally, the injection molded part is divided into multiple sections in an equal spacing manner, and optionally, the injection molded part is a bumper of a vehicle.

[0059] Reference Figure 4 Optionally, the injection molded product is divided into sections at intervals of 50 mm, and the position of each section is fixed. The mass of each divided body can be calculated, so that the deformation of a specific section can be calculated. i Represents the axial moment of inertia of any split cross section, m i Represents the mass of any split body.

[0060] In step S102, the minimum axial moment of inertia of the cross section of each section of the injection molded part is calculated, and the rigid deformation of each section of the injection molded part is calculated based on the minimum axial moment of inertia and the mass of the cross section corresponding to each section of the injection molded part. Because it is necessary to find the weakest point of rigidity of the injection molded part, the minimum axial moment of inertia is found on the cross section of each section of the injection molded part, and the rigid deformation of each section of the injection molded part is calculated based on the minimum axial moment of inertia and the mass of the cross section corresponding to each section of the injection molded part.

[0061] In step S103, the maximum value of the rigid deformation of all segments of the injection molded part is obtained, and the segment of the injection molded part corresponding to the maximum value is the minimum rigidity position of the injection molded part. At this time, the minimum rigidity position of the injection molded part is found, and both the worker and the machine handling device can set the handling and clamping position according to the minimum rigidity position of the injection molded part, thereby protecting the injection molded part from damage during the handling process.

[0062] The present invention combines the cantilever beam principle to construct a rigidity evaluation model, calculates the deformation of each section through the equally spaced section method, and finds the weakest position of the product, so as to quantitatively evaluate the rigidity of the injection molded parts during the operation process of carrying, sliding, grabbing, etc.

[0063] The present invention skillfully combines the principle of the cantilever beam with the product handling status to construct a model. Through the equidistant splitting method, it overcomes the uncertainty and difficulty of the product cross-section and realizes the quantitative evaluation of the deformation.

[0064] The present invention solves the problem in the prior art that when a bumper is transported manually or by machine, it is difficult to transport it, which is caused by the inability to confirm its weakest position. By adopting the rigidity evaluation method of the injection molded part provided by the present invention, the weakest position of the bumper can be accurately found, and the clamping position during transportation can be set to guide the protection during transportation.

[0065] Reference Figure 5 In one embodiment, the minimum axial moment of inertia of a cross section of each section of the injection molded part is calculated, including:

[0066] A coordinate system is constructed at the cross section of each section of the injection molded part, wherein the first coordinate axis of the coordinate system is set in the length direction of the injection molded part, the second coordinate axis is set in the gravity direction, and the third coordinate axis is set in the normal direction of the plane formed by the first coordinate axis and the second coordinate axis;

[0067] For each section of the injection molded part, the minimum axial moment of inertia of the cross section of each section of the injection molded part is calculated based on the distance from each differential region on the cross section to the third coordinate axis.

[0068] By constructing a coordinate system, it is convenient to calculate the minimum axial moment of inertia of each section of the injection molded part.

[0069] Reference Figure 5 In one embodiment, for each section of the injection molded part, based on the distance from each differential region on the cross section to the third coordinate axis, the minimum axial moment of inertia of the cross section of each section of the injection molded part is calculated, including:

[0070] The minimum axial moment of inertia of the cross section of the i-th section of the injection molded part is calculated as:

[0071] I i =MIN{∫f(x) 2 dA}-------(4)

[0072] Where dA is the differential area on the cross section, f(x) is the distance from the differential area to the third coordinate axis, and I i is the minimum axial moment of inertia of the cross section of the i-th section of the injection molded part.

[0073] Construct a coordinate system at the cross section, where y is the length direction of the injection molded part, z is the gravity direction, x is the normal direction of the yz plane, and the cross section of each section of the injection molded part is on the xz plane. dA is the differential area on the cross section, and f(x) is the distance from the differential area to the x-axis.

[0074] make I i =I min (y) = MIN{∫f(x) 2 dA}-------(5)

[0075] I min (y) is the value of the minimum axial moment of inertia of each section of the injection molded part.

[0076] Select the deformation bending rotation axis (z axis) during transportation to calculate the axial moment of inertia. The axial moment of inertia can represent the bending resistance of the section. The smaller the axial moment of inertia, the greater the deformation. Because it is necessary to find the weakest position of the injection molded part, the minimum axial moment of inertia of the section of each section of the injection molded part is calculated. By calculating the minimum axial moment of inertia I of the section of each section of the injection molded part i , making the subsequent calculation of the rigid deformation of each section of the injection molded part more accurate.

[0077] Reference Figure 6 In one embodiment, calculating the rigid deformation of each section of the injection molded part according to the minimum axial inertia moment and mass of the cross section corresponding to each section of the injection molded part includes:

[0078] For each segment of the injection molded part, calculate the sum of the gravity from the starting segment farthest from the injection molded part grabbing position to the segment;

[0079] According to the sum of gravity of each section, the distance from the deformed part of each section to the corresponding section, the elastic modulus of the material used for the injection molded part and the minimum axial moment of inertia of the section, the rigid deformation of the section corresponding to each section of the injection molded part is calculated.

[0080] Here, the starting segment farthest from the gripping position of the injection molded part can be defined as the first segment.

[0081] By calculating the rigid deformation of the cross section corresponding to each section of the injection molded part, we can compare which section has the largest rigid deformation, thereby finding the weakest part of the injection molded part.

[0082] In one embodiment, the sum of the gravity of each section is calculated according to the mass of each part, including:

[0083] Calculate the sum of the gravity of the i-th section of the injection molded part:

[0084]

[0085] Among them, m iis the mass of each section of the injection molded part, g is the acceleration due to gravity, F i is the sum of the gravity of the i-th section of the injection molded part. F i The sum of the gravity of the i-th section of the injection molded part refers to the sum of the gravity of all sections from the first section to the i-th section.

[0086] By calculating the gravity and force of each section of the injection molded part, we can prepare for the subsequent calculation of the rigid deformation of the cross section.

[0087] In one embodiment, the rigid deformation of the cross section corresponding to each section of the injection molded part is calculated according to the gravity of each section, the distance from the deformed part of each section to the corresponding cross section, the elastic modulus of the material used for the injection molded part, and the minimum axial moment of inertia of the cross section, including:

[0088] The rigid deformation of the cross section corresponding to the i-th section of the injection molded part is calculated as:

[0089]

[0090] Among them, F i is the weight of the injection molded part at the i-th section, L i is the distance from the center of gravity of the deformed part of the i-th section of the injection molded part to the grasping position (i.e., the clamping position) of the injection molded part, l i is the distance from the cross section corresponding to the i-th segment to the gripping position (i.e., clamping position) of the injection molded part, E is the elastic modulus of the material used for the injection molded part, and I i is the minimum axial moment of inertia of the cross section of the injection molded part, R i is the rigid deformation of the cross section corresponding to the i-th section of the injection molded part.

[0091] By calculating the rigid deformation of the cross section corresponding to each section of the injection molded part, the weakest position of the injection molded part can be found and the handling can be carried out.

[0092] Reference Figure 6 In one embodiment, calculating the rigid deformation of each section of the injection molded part according to the minimum axial inertia moment and mass of the cross section corresponding to each section of the injection molded part includes:

[0093] First calculate the gravity and F of each section of the injection molded part i , the calculation formula is as follows:

[0094]

[0095] Among them, m i is the mass of each section of the injection molded part, g is the acceleration due to gravity;

[0096] Then calculate the rigid deformation R of the cross section corresponding to each section of the injection molded part i , the calculation formula is:

[0097]

[0098] Among them, F i is the weight of the injection molded part at the i-th section, L i is the distance from the center of gravity of the deformed part of the i-th section of the injection molded part to the grasping position of the injection molded part, l i is the distance from the section corresponding to the i-th segment to the gripping position of the injection molded part, E is the elastic modulus of the material used for the injection molded part, I i is the minimum axial moment of inertia of the cross section of the injection molded part, R i is the rigid deformation of the cross section corresponding to the i-th section of the injection molded part.

[0099] Figure 6 In the process, the injection molded parts, such as the bumper of a vehicle, are divided into sections at intervals of 50 mm. The position of this section will be fixed, and the mass of each section can be calculated, so that the deformation of a specific section can be calculated.

[0100] The deformation of each section can be calculated by formula (5), so that the section with the largest rigid deformation of the entire bumper can be found, that is, the weakest position.

[0101] like Figure 7 and Figure 8 As shown in the figure, after the injection molded part is divided into 18 sections, the rigid deformation calculated for each section is: 0.0, 0.1, 0.5, 1.0, 1.8, 2.7, 3.8, 5.1, 6.6, 8.0, 9.8, 12.3, 14.1, 4.6, 5.2,

[0102] 5.6,5.8,11.8,8.8. Figure 8 As shown, the position of the injection molded part with a rigid deformation of 14.1 is the weakest position of the injection molded part.

[0103] The method for calculating the rigid deformation of the cross section corresponding to each section of the injection molded part provided in this embodiment enables the weakest position of the injection molded part to be accurately located, thereby solving the problem of inconvenience in handling caused by relying solely on experience to determine the weakest position of the injection molded part in the prior art.

[0104] In one embodiment, the method further includes: after determining the minimum rigidity position of the injection molded part, performing a handling operation on the injection molded part according to the minimum rigidity position of the injection molded part.

[0105] After finding the minimum rigidity position of the injection molded parts, workers or machine handling devices can scientifically set the handling clamping position according to this minimum rigidity position. This can reduce manpower when manually handling the injection molded parts, and can more accurately find the handling point when the machine handling device handles the injection molded parts, thereby protecting the injection molded parts from damage.

[0106] Reference Fig. 9 The present invention also provides a hardware structure diagram of an electronic device, including:

[0107] at least one processor 901; and,

[0108] A memory 902 that is communicatively connected to at least one of the processors 901; wherein:

[0109] The memory 902 stores instructions that can be executed by at least one processor. The instructions are executed by the at least one processor so that the at least one processor can perform the above-mentioned method for evaluating the rigidity of the injection molded part.

[0110] Fig. 9 A processor 901 is taken as an example.

[0111] The electronic device is preferably a controller of the vehicle. The electronic device may further include: an input device 909 and a display device 904 .

[0112] The processor 901, the memory 902, the input device 909 and the display device 904 may be connected via a bus or other means, and the figure takes the connection via a bus as an example.

[0113] The memory 902 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions / modules corresponding to the rigidity evaluation method of the injection molded part in the embodiment of the present application, for example, Figure 1 The processor 901 executes various functional applications and data processing by running the non-volatile software programs, instructions and modules stored in the memory 902, that is, the rigidity evaluation method of the injection molded part in the above embodiment is implemented.

[0114] The memory 902 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required by at least one function; the data storage area may store data created according to the use of the method for evaluating the rigidity of injection molded parts, etc. In addition, the memory 902 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 902 may optionally include a memory remotely arranged relative to the processor 901, and these remote memories may be connected to a device for executing the method for evaluating the rigidity of injection molded parts via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0115] The input device 909 may receive a user click input, and generate a signal input related to a user setting of the injection molded part rigidity evaluation method and a function control. The display device 904 may include a display device such as a display screen.

[0116] One or more modules are stored in the memory 902 , and when executed by one or more processors 901 , the rigidity evaluation method of the injection molded part in any of the above method embodiments is executed.

[0117] The present invention solves the problem in the prior art that when a bumper is transported manually or by machine, it is difficult to transport it, which causes the inability to confirm its weakest position. By using the rigidity evaluation method of the injection molded part provided by the present invention, the weakest position of the injection molded part can be accurately found, thereby protecting it during transportation.

[0118] An embodiment of the present invention provides a storage medium, wherein the storage medium stores computer instructions. When a computer executes the computer instructions, the storage medium is used to execute all steps of the method for evaluating the rigidity of an injection molded part as described above.

[0119] In the context of the present disclosure, a storage medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or apparatus. The storage medium may be a machine-readable signal medium or a machine-readable storage medium. Alternatively, the storage medium may be a non-temporary computer-readable storage medium, for example, a non-temporary computer-readable storage medium may be a ROM, a random access memory (Random Access Memory, RAM), a compact disk read-only memory (Compact Dis sc ROM, CD-ROM), a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0120] An embodiment of the present invention provides a computer program product, including a computer program / instruction, which implements the aforementioned method for evaluating the rigidity of an injection molded part when executed by a processor.

[0121] The above description is only the principle and preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several other modifications can be made based on the principle of the present invention, which should also be considered as the protection scope of the present invention.

[0122] The above description is only the principle and preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several other modifications can be made based on the principle of the present invention, which should also be considered as the protection scope of the present invention.

Claims

1. A method for evaluating the rigidity of an injection molded part, characterized in that: include: Acquire the size and mass data of the injection molded part, and divide the injection molded part into multiple sections according to the calculated spacing in the direction perpendicular to the ground, wherein the calculated spacing is calculated according to the size of the injection molded part; Calculating the minimum axial moment of inertia of the cross section of each section of the injection molded part, and calculating the rigid deformation of each section of the injection molded part according to the minimum axial moment of inertia and the mass of the cross section corresponding to each section of the injection molded part; The maximum value of the rigid deformation in all the segments of the injection molded part is obtained as the maximum rigid deformation, and the position of the segment corresponding to the maximum rigid deformation is taken as the minimum rigidity position.

2. The method for evaluating the rigidity of an injection molded part according to claim 1, characterized in that: The calculating of the minimum axial moment of inertia of the cross section of each section of the injection molded part comprises: Constructing a coordinate system at the cross section of each section of the injection molded part, wherein the first coordinate axis of the coordinate system is set in the length direction of the injection molded part, the second coordinate axis is set in the gravity direction, and the third coordinate axis is set in the normal direction of the plane formed by the first coordinate axis and the second coordinate axis; For each section of the injection molded part, the minimum axial moment of inertia of the cross section of each section of the injection molded part is calculated based on the distance from each differential region on the cross section to the third coordinate axis.

3. The method for evaluating the rigidity of an injection molded part according to claim 2, characterized in that: The step of calculating the minimum axial moment of inertia of a cross section of each section of the injection molded part based on the distance from each differential region on the cross section to the third coordinate axis comprises: The minimum axial moment of inertia of the cross section of the i-th section of the injection molded part is calculated as: I i =MIN{∫f(x) 2 dA} Where dA is the differential area on the cross section, f(x) is the distance from the differential area to the third coordinate axis, and I i is the minimum axial moment of inertia of the cross section of the i-th section of the injection molded part.

4. The method for evaluating the rigidity of an injection molded part according to claim 1, characterized in that , the calculation of the rigid deformation of each section of the injection molded part according to the minimum axial inertia moment and mass of the cross section corresponding to each section of the injection molded part includes: For each section of the injection molded part, calculate the sum of the gravity from the starting section farthest from the injection molded part grabbing position to the section; The rigid deformation of the cross section corresponding to each section of the injection molded part is calculated according to the sum of the gravity of each section, the distance from the deformed part of each section to the corresponding cross section, the elastic modulus of the material used for the injection molded part and the minimum axial moment of inertia of the cross section.

5. The method for evaluating the rigidity of an injection molded part according to claim 4, characterized in that: The calculation of the gravity sum of each section according to the mass of each part includes: Calculate the sum of the gravity of the i-th section of the injection molded part: Among them, m i is the mass of each section of the injection molded part, g is the acceleration due to gravity, F i is the sum of the gravity of the i-th section of the injection molded part.

6. The method for evaluating the rigidity of an injection molded part according to claim 4, characterized in that: The method of calculating the rigid deformation of the cross section corresponding to each section of the injection molded part according to the gravity of each section, the distance from the deformed part of each section to the corresponding cross section, the elastic modulus of the material used for the injection molded part, and the minimum axial moment of inertia of the cross section includes: The rigid deformation of the cross section corresponding to the i-th section of the injection molded part is calculated as: Among them, F i is the weight of the injection molded part at the i-th section, L i is the distance from the center of gravity of the deformed part of the i-th section of the injection molded part to the grasping position of the injection molded part, l i is the distance from the section corresponding to the i-th segment to the gripping position of the injection molded part, E is the elastic modulus of the material used for the injection molded part, I i is the minimum axial moment of inertia of the cross section of the injection molded part, R i is the rigid deformation of the cross section corresponding to the i-th section of the injection molded part.

7. The method for evaluating the rigidity of an injection molded part according to any one of claims 1 to 6, characterized in that: Also includes: After the minimum rigidity position of the injection molded part is determined, a handling operation is performed on the injection molded part according to the minimum rigidity position of the injection molded part.

8. An electronic device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to at least one of the processors; wherein, The memory stores instructions that can be executed by at least one of the processors, and the instructions are executed by at least one of the processors to enable the at least one processor to perform the method for evaluating the rigidity of an injection molded part according to any one of claims 1 to 7.

9. A storage medium, characterized in that: The storage medium stores computer instructions, and when a computer executes the computer instructions, it is used to execute all steps of the method for evaluating the rigidity of an injection molded part according to any one of claims 1 to 7.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the method for evaluating the rigidity of an injection molded part according to any one of claims 1 to 7 is implemented.

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