Hot bending forming clamp, testing machine and numerical simulation method
阅读说明：本技术 一种热弯成型夹具、试验机及数值仿真方法 (Hot bending forming clamp, testing machine and numerical simulation method ) 是由 郑帮智 王亮赟 王泽龙 冯兆龙 于 2021-08-31 设计创作，主要内容包括：本发明涉及金属材料热成型技术领域,具体涉及一种热弯成型夹具、试验机及数值仿真方法,该热弯成型夹具包括推杆、凸模、凹模、滑动螺杆、限位销和固定盘,固定盘上设置有拖环和止推盘,限位销安装在滑动螺杆上,滑动螺杆穿过止推盘并可拆卸地安装在凹模上,凸模上设置有凸起,凹模相对凸模的一端上设置有与凸模上的凸起相匹配的凹槽,试样安装在凹模的凹槽端上,推杆安装在凸模上。运用该热弯成型夹具进行热弯试验可确定金属试样的热弯工艺参数,以用于指导实际生产,且基于热弯试验参数可反推建立准确的热弯仿真模型,进而为后续相关工艺的复杂模型建模提供依据。(The invention relates to the technical field of metal material hot forming, in particular to a hot bending forming fixture, a testing machine and a numerical simulation method. The hot bending forming fixture is used for hot bending tests to determine hot bending process parameters of the metal sample so as to guide actual production, and an accurate hot bending simulation model can be established in a reverse-deducing mode based on the hot bending test parameters, so that a basis is provided for complex model modeling of subsequent related processes.)
1. A hot bending forming clamp is characterized by comprising a push rod (1), a male die (2), a female die (4), a sliding screw (5), a limiting pin (6) and a fixed disk (9);
be provided with on fixed disk (9) towring (8) with thrust dish (7), spacer pin (6) are installed on sliding screw (5), sliding screw (5) pass thrust dish (7) and detachably install on die (4), be provided with the arch on terrace die (2), die (4) are relative one of terrace die (2) serve be provided with protruding assorted recess on terrace die (2), install sample (3) on the groove end of die (4), install push rod (1) on terrace die (2).
2. The clamp for hot bending forming according to claim 1, wherein the towing ring (8) is arranged on the inner side of the fixed plate (9), the thrust plate (7) is of a convex structure, the top of the thrust plate (7) abuts against the towing ring (8), and stepped parts at two ends of the thrust plate (7) abut against the fixed plate (9).
3. The hot bending forming fixture according to claim 2, wherein the thrust disk (7) is provided with screw holes, the towing ring (8) is provided with screw holes corresponding to the screw holes of the thrust disk (7), and the thrust disk (7) is mounted on the towing ring (8) through bolts.
4. The hot bend forming fixture according to claim 2, wherein the female die (4) abuts against the bottom of the thrust plate (7), and a threaded hole is provided on an abutting end of the female die (4) for mounting the sliding screw (5).
5. The hot bending forming fixture according to claim 4, wherein a central hole is further formed in the middle of the thrust plate (7), and a threaded end of the sliding screw (5) penetrates through the central hole and is mounted in a threaded hole in an abutting end of the female die (4).
6. The hot bending forming fixture according to claim 5, wherein a non-threaded end of the sliding screw (5) is provided with a limiting hole for fixing the position of the female die (4).
7. The hot bending fixture according to claim 1, wherein the male mold (4) is provided with a push rod hole for mounting the push rod (1).
8. The utility model provides a hot bending test machine, its characterized in that, hot bending test machine include: a hydraulic system, an environmental chamber, a master control system and the hot roll forming fixture of any one of the preceding claims 1 to 7;
a circulating cooling system, a heating system and a vacuum system are arranged in the environment box;
a driving shaft of the hydraulic system penetrates through a box body of the environment box and is connected with the actuator;
the push rod (1) of the hot bending forming clamp is arranged on the actuator, and the fixing plate (9) is connected with a fixing column of the vacuum system.
9. A hot-bending forming numerical simulation method applied to the hot-bending forming testing machine of claim 8, wherein the hot-bending forming numerical simulation method comprises:
modeling the male die (2), the female die (4) and the sample (3) by operating simulation software according to an actual processing drawing;
setting corresponding temperature parameters according to the material properties of the sample (3);
setting the connection and action relationship among the male die (2), the female die (4) and the sample (3);
setting loading speed and loading time according to the actual situation of the test;
dividing grids and selecting temperature units;
submitting calculation and extracting a calculation result;
and comparing the calculation result with the test result, correcting the material input parameters according to the difference, and circularly calculating until an accurate numerical model is obtained.
10. The method for numerical simulation of hot roll forming according to claim 9, wherein the method for numerical simulation of hot roll forming further comprises, before simulation:
initializing a hot bending forming tester, and confirming that each functional module works normally;
mounting the sample (3) on a hot bending forming clamp;
starting a circulating cooling system to cool each functional component in the environment box;
locking the environment box, starting a vacuum system to vacuumize the interior of the environment box to be within a set value, then starting a heating system to heat to the set value and keeping the temperature constant;
starting loading by an actuator according to a preset condition, driving a push rod (1) to act to bend and form a sample (3) in a hot bending mode, and recording related data;
and resetting the hot bending forming testing machine, opening the environment box after the resetting is finished, and taking out the sample (3) to finish the hot bending test.
Technical Field
The invention relates to the technical field of metal material forming, in particular to a hot bending forming clamp, a testing machine and a numerical simulation method.
Background
The hot bending forming is mainly used for forming plate-shaped sections with poor normal-temperature plastic forming capability and special process requirements, and the quality of the hot bending forming is closely related to the selection of hot bending process parameters (such as heating temperature, loading (forming) speed, heat preservation time and the like).
In the prior art, cold forming such as bending and roll bending is usually adopted for bending metal materials, but for materials with poor normal temperature plastic formability such as high-strength steel, titanium-aluminum alloy and the like, a cold forming processing mode is adopted, may cause the problems of cracking and breaking of the material in the forming process, serious product resilience, serious abrasion of the die (roller and bending machine) and the like, in addition, in the prior art, the thermal forming technological parameters are generally obtained by adopting a method which is continuously tried in the production field, therefore, the resource waste and the cost are inevitably caused, and in addition, the thermal forming simulation is carried out by a finite element method, but because the material constitutive parameters adopted by the thermal forming simulation are obtained by software self-carrying or simple tensile test, the simulation result usually cannot accurately reflect the actual situation, and because the simulation and the actual production are split, an accurate basis cannot be provided for the complex model modeling of the subsequent related process.
Disclosure of Invention
The invention provides a hot bending forming clamp, a testing machine and a numerical simulation method for solving the problems in the background technology.
In order to achieve the above object, a first aspect of the present invention provides a hot roll forming jig, including:
the device comprises a push rod, a male die, a female die, a sliding screw, a limiting pin and a fixed disk;
the fixed disc is provided with the towing ring and the thrust disc, the limit pin is installed on the sliding screw, the sliding screw penetrates through the thrust disc and is detachably installed on the female die, the male die is provided with a protrusion, the female die is opposite to one end of the male die, the protruding groove is formed in the groove end of the male die, a groove matched with the protrusion on the male die is formed in the end of the male die, the sample is installed on the groove end of the female die, and the push rod is installed on the male die.
Preferably, the towing ring is arranged on the inner side of the fixed disk, the thrust disk is of a convex structure, the top of the thrust disk abuts against the towing ring, and the step parts at two ends of the thrust disk abut against the fixed disk.
Preferably, the thrust disc is provided with a screw hole, the towing ring is provided with a screw hole corresponding to the screw hole on the thrust disc, and the thrust disc is mounted on the towing ring through a bolt.
Preferably, the female die is abutted to the bottom of the thrust plate, and a threaded hole is formed in the abutting end of the female die and used for mounting the sliding screw.
Preferably, a central hole is further formed in the middle of the thrust plate, and a threaded end of the sliding screw penetrates through the central hole and is mounted in a threaded hole in the abutting end of the female die.
Preferably, a non-threaded end of the sliding screw is provided with a limiting hole for fixing the position of the female die.
Preferably, a push rod hole is formed in the male die and used for installing the push rod.
In a second aspect, the present invention provides a hot bend forming tester, including:
the hot bending forming device comprises a hydraulic system, an environment box, a main control system and a hot bending forming clamp;
a circulating cooling system, a heating system and a vacuum system are arranged in the environment box;
a driving shaft of the hydraulic system penetrates through a box body of the environment box and is connected with the actuator;
the push rod of the hot bending forming clamp is arranged on the actuator, and the fixed plate is connected with the fixed column of the vacuum system.
The third aspect of the invention provides a numerical simulation method for hot bending forming, which comprises the following steps:
modeling the male die, the female die and the sample by operating simulation software according to an actual processing drawing;
setting corresponding temperature parameters according to the material properties of the sample;
setting the connection and action relationship among the male die, the female die and the sample;
setting loading speed and loading time according to the actual situation of the test;
dividing grids and selecting temperature units;
submitting calculation and extracting a calculation result;
and comparing the calculation result with the test result, correcting the material input parameters according to the difference, and circularly calculating until an accurate numerical model is obtained.
Preferably, the method for simulating a hot bending forming numerical value further comprises, before the simulation:
initializing a hot bending forming tester, and confirming that each functional module works normally;
mounting the sample on a hot bending forming clamp;
starting a circulating cooling system to cool each functional component in the environment box;
locking the environment box, starting a vacuum system to vacuumize the interior of the environment box to be within a set value, then starting a heating system to heat to the set value and keeping the temperature constant;
starting loading by an actuator according to a preset condition, driving a push rod to act to carry out hot bending forming on the sample, and recording related data;
and resetting the hot bending forming testing machine, opening the environment box after the resetting is finished, and taking out the sample to finish the hot bending test.
According to the technical scheme, a specially-made hot bending forming clamp is used for carrying out hot bending tests, because the protrusions of the male die are matched with the grooves of the female die, hot bending process parameters of different metal samples in different bending shapes can be quickly obtained, the process parameters of sample hot bending obtained based on the tests can be used for establishing an accurate hot bending numerical simulation model in a reverse thrust mode, and further providing basis for complex model modeling of subsequent related processes.
Drawings
FIG. 1 is a schematic cross-sectional view of a hot roll forming jig;
FIG. 2 is a block diagram of the working principle of the hot bending forming tester;
FIG. 3 is a stress-strain diagram in example 1 of a numerical simulation method for hot bend forming;
FIG. 4 is a flow chart of a method of testing the hot bend forming tester;
FIG. 5 is a flow chart of a hot bend forming numerical simulation method.
Description of the reference numerals
A push rod 1; a male die 2; sample 3; a female die 4; a sliding screw 5;
a limit pin 6; a thrust disk 7; a drag ring 8; and fixing the disc 9.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
In the present invention, the terms of orientation such as "upper, lower, left, and right" used in the case where no description is made to the contrary generally refer to the upper, lower, left, and right directions of the hot roll forming jig shown in fig. 1.
The invention provides a hot bending forming clamp in a first aspect, as shown in fig. 1, the hot bending forming clamp comprises a push rod 1, a male die 2, a female die 4, a sliding screw 5, a limit pin 6 and a fixed disk 9;
the fixed disc 9 is provided with a towing ring 8 and a thrust disc 7, the limit pin 6 is installed on the sliding screw 5, the sliding screw 5 penetrates through the thrust disc 7 and is detachably installed on the female die 4, the male die 2 is provided with a bulge, the female die 4 is opposite, one end of the male die 2 is provided with a groove matched with the bulge on the male die 2, the sample 3 is installed on the groove end of the female die 4, and the push rod 1 is installed on the male die 2.
According to the technical scheme, a specially-made hot bending forming clamp is used for carrying out hot bending tests, because the protrusions of the male die are matched with the grooves of the female die, hot bending process parameters of different metal samples in different bending shapes can be quickly obtained, the process parameters of sample hot bending obtained based on the tests can be used for establishing an accurate hot bending numerical simulation model in a reverse thrust mode, and further providing basis for complex model modeling of subsequent related processes.
According to a preferred embodiment, the towing ring 8 is arranged inside the fixed disk 9, the thrust disk 7 is of a convex structure, the top of the thrust disk 7 abuts against the towing ring 8, and the step parts at two ends of the thrust disk 7 abut against the fixed disk 9.
Furthermore, a screw hole is formed in the thrust disc 7, a screw hole corresponding to the screw hole in the thrust disc 7 is formed in the towing ring 8, and the thrust disc 7 is mounted on the towing ring 8 through a bolt.
Further, the female die 4 abuts against the bottom of the thrust disc 7, and a threaded hole is formed in the abutting end of the female die 4 and used for installing the sliding screw 5.
Furthermore, a central hole is formed in the middle of the thrust disc 7, and a threaded end of the sliding screw rod 5 penetrates through the central hole and is installed in a threaded hole in the abutting end of the female die 4.
Furthermore, a non-threaded end of the sliding screw 5 is provided with a limiting hole for fixing the position of the female die 4.
Further, a push rod hole is formed in the male die 4 and used for installing the push rod 1.
In the embodiment of the present invention, as shown in fig. 1, the fixed disk 9 and the towing ring 8 are both hollow cylinders, the towing ring 8 is disposed in the fixed disk 9, the thrust disk 7 is a convex structure formed by splicing two cylinders with different transverse cross-sectional diameters, the cylinder with the small cross-sectional diameter is located above the cylinder with the large cross-sectional diameter, the top of the thrust disk 7 is abutted to the bottom of the towing ring 8, the stepped portions at two ends of the thrust disk 7 are abutted to the fixed disk 9, wherein the top of the thrust disk 7 is provided with three screw holes, the three screw holes are arranged in a regular triangle, the bottom of the towing ring 8 is provided with screw holes corresponding to the screw holes at the top of the thrust disk 7, the thrust disk 7 is mounted on the towing ring 8 through bolts, and further, the female die 4 is abutted to the bottom of the thrust disk 7, the butt end of the female die 4 is provided with a threaded hole, the center position of the thrust plate 7 is further provided with a central hole, the threaded end of the sliding screw rod 5 penetrates through the central hole and is installed in the threaded hole at the butt end of the female die 4, and the non-threaded end of the sliding screw rod 5 is provided with a limiting hole for the limiting pin 6 to penetrate through the limiting hole to fix the female die 4 below the thrust plate 7, further, the male die 2 is provided with a push rod hole for installing the push rod 1, wherein in practical application, the shapes of the bulge on the male die 2 and the groove on the female die 4 can be correspondingly customized according to practical requirements for preparing the hot bending sample 3 with a specific shape and an angle, meanwhile, each component of the hot bending forming clamp is made of a heat-resistant stainless steel material and has enough rigidity to ensure that in the process of hot bending the sample 3, the hot bending forming fixture is not damaged, and the type of the heat-resistant stainless steel material is preferably 1Cr11Ni2W2MoV or Cr25Ni 20.
In a second aspect, the present invention provides a hot bend forming tester, including:
the hot bending forming device comprises a hydraulic system, an environment box, a main control system and a hot bending forming clamp;
a circulating cooling system, a heating system and a vacuum system are arranged in the environment box;
a driving shaft of the hydraulic system penetrates through a box body of the environment box and is connected with the actuator;
the push rod 1 of the hot bending forming clamp is arranged on the actuator, and the fixing plate 9 is connected with a fixing column of the vacuum system.
In the embodiment of the present invention, the working principle of the hot bending forming tester is shown in fig. 2, and the specific steps of the hot bending forming tester during testing are as follows:
confirming the installation position of each component of the hot bending forming fixture;
initializing a hot bending forming tester, and confirming that each functional module works normally;
spraying a high-temperature lubricant on the surface of the sample 3 and the working surfaces of the female die 4 and the male die 2, and sequentially installing all components of the hot-bending forming fixture in an environment box according to confirmed positions after drying;
starting a circulating cooling system to cool each functional component in the environment box;
locking the environment box, starting a vacuum system to vacuumize the interior of the environment box to be within a set value, then starting a heating system to heat to the set value and keeping the temperature constant;
starting loading by an actuator according to a preset condition, driving a push rod 1 to act to carry out hot bending forming on a sample 3, and recording data such as a maximum load, a stress-strain curve and a rebound curve; wherein the temperature of the sample 3 is measured by a thermocouple arranged in the environment box;
and (3) closing the heating system, starting the cooling circulation system to cool the environment box, closing the cooling circulation system after the temperature is reduced to a set temperature, starting the vacuum system to supply air reversely, closing the vacuum system after the air pressure of the environment box is changed into atmospheric pressure, starting the circulation cooling system, continuously cooling the environment box, observing the temperature displayed by the environment box, and opening the environment box to take out the sample 3 when the temperature is reduced to be below a set value to finish the hot bending test.
The action process of the functional module is controlled and completed by the main control system.
In a third aspect of the present invention, there is provided a numerical simulation method for hot bending forming, as shown in fig. 5, the method including the steps of:
s1, operating simulation software according to an actual processing drawing to model the male die 2, the female die 4 and the sample 3; wherein the simulation software is preferably Abaqus;
s2, setting corresponding temperature parameters according to the material properties of the sample 3;
s3, setting the connection and action relationship of the male die 2, the female die 4 and the sample 3;
specifically, step S3 includes disposing the protrusion of the male mold 2 against the groove of the female mold 4, and disposing the test piece 3 on the groove of the female mold 4.
S4, setting the loading speed and the loading time according to the actual situation of the test;
specifically, step S4 further includes setting a loading load, a loading displacement, and the like.
S5, dividing grids and selecting temperature units;
specifically, step S5 includes refining the grid of the region to be bent of the test sample 3 and preventing the grid from being distorted by using a grid adaptive technique.
S6, submitting calculation and extracting a calculation result;
specifically, step S6 includes extracting the maximum load, the stress-strain curve, the rebound curve, and the like in the result, and preferably, employing multi-core parallel computation to improve the computation efficiency.
And S7, comparing the calculation result with the test result, correcting the material input parameters according to the difference, and circularly calculating until an accurate numerical model is obtained.
In the embodiment of the invention, in the finite element numerical simulation model in the prior art, material parameters including density, elastic modulus, Poisson's ratio, thermal conductivity, specific heat and the like are determined by the characteristics of a sample material, so that a numerical simulation model is established, namely a temperature-related stress-strain curve of the material is established, meanwhile, when direct hot bending forming simulation is considered, because the strain data obtained under the conditions of software self-carrying and simple sample tensile test are less, the actual situation cannot be reflected when large deformation is formed, at the moment, the test data is subjected to reverse-push fitting by combining the constitutive model to obtain the stress-strain curve under the large deformation condition, meanwhile, the reverse-push curve is determined by the constitutive equation and has certain artificial factors, under the same test data, a plurality of curves may exist, and a proper curve is selected for multiple times of cycle calculation, and comparing the curve obtained by the test each time, if the calculation result of the curve is close to the test result, the numerical simulation model established by the curve is a reliable numerical simulation model, wherein the hot bending test can be applied to hot stamping, hot bending, hot roll bending and the like, so that the established numerical simulation model can be further applied to complex numerical models.
According to a preferred embodiment, as shown in fig. 4, the hot bending numerical simulation method further comprises the following steps before simulation:
s1, initializing a hot bending forming tester, and confirming that each functional module works normally;
specifically, step S1 includes confirming the mounting positions of the components of the hot roll forming jig before initialization.
S2, mounting the sample 3 on a hot bending forming clamp;
specifically, step S2 includes spraying a high-temperature lubricant onto the surface of the sample 3 and the working surfaces of the female die 4 and the male die 2, and after drying, sequentially installing the components of the hot-bending forming jig in an environmental chamber at the confirmed positions.
S3, starting a circulating cooling system to cool each functional component in the environment box;
s4, locking the environment box, starting a vacuum system to vacuumize the interior of the environment box to be within a set value, then starting a heating system to heat to the set value and keeping the temperature constant;
s5, starting loading by the actuator according to preset conditions, driving the push rod 1 to act to bend and form the sample 3, and recording related data;
specifically, step S5 includes recording data such as the maximum load, the stress-strain curve, and the rebound curve.
And S6, resetting the hot bending forming testing machine, opening the environmental box after the resetting is finished, taking out the sample 3, and finishing the hot bending test.
Specifically, the reset process in step S6 includes: and (3) closing the heating system, starting the cooling circulation system to cool the environment box, closing the cooling circulation system after the temperature is reduced to a set temperature, starting the vacuum system to supply air reversely, closing the vacuum system after the air pressure of the environment box is changed into atmospheric pressure, starting the circulation cooling system, continuously cooling the environment box, observing the temperature displayed by the environment box, and opening the environment box to take out the sample 3 when the temperature is reduced to be below a set value to finish the hot bending test.
By using the hot bending forming numerical simulation method provided by the scheme of the invention, corresponding hot bending simulation models can be accurately established for the metal samples 3 made of different materials, and the following description is given by combining the specific metal samples 3 for example.
Example 1
With reference to fig. 1, 2, 4, and 5, in this embodiment, a sample 3 is made of a titanium alloy TC4, the thickness t is 4mm, the plate width is 45mm, the plate length is 120mm, a hot bending mold includes a male mold 2 and a female mold 4, the hot bending mold is made of 1Cr11Ni2W2MoV heat-resistant stainless steel, the hot bending angle of the mold is 90 degrees, the test temperature is 500 ℃, the loading speed is 10mm/min, and the hot bending mold is applied to the hot bending testing machine, and the hot bending numerical simulation method includes:
confirming the installation position of each component of the hot bending forming fixture;
initializing a hot bending forming tester, and confirming that each functional module works normally;
spraying a high-temperature lubricant on the surface of the sample 3 and the working surfaces of the female die 4 and the male die 2, standing for 5 minutes at normal temperature, and sequentially installing all components of the hot bending forming fixture in an environment box according to confirmed positions after drying;
starting a circulating cooling system to cool each functional component in the environment box;
locking the environment box, starting a vacuum system to vacuumize the interior of the environment box to be within 10Pa, then starting a heating system to heat to 500 ℃ and keeping the temperature constant for 30 minutes;
the actuator starts to load at the speed of 10mm/min, drives the push rod 1 to act to carry out hot bending forming on the sample 3, and records related data such as maximum load, a stress-strain curve, a rebound curve and the like; wherein the temperature of the sample 3 is measured by a thermocouple arranged in the environment box;
closing the heating system, starting the cooling circulation system to cool the environment box, closing the cooling circulation system after the temperature is reduced to 200 ℃, starting the vacuum system to supply air reversely, and changing the air pressure of the environment box to 10 atmospheric pressure5After pa, the vacuum is turned offThe system starts the circulating cooling system, continues to cool the environment box, observes the temperature displayed by the environment box, opens the environment box to take out the sample 3 when the temperature is reduced to below 100 ℃, and completes the hot bending test;
operating simulation software Abaqus according to an actual processing drawing to model the male die 2, the female die 4 and the sample 3;
setting corresponding temperature parameters according to the material properties of the titanium alloy TC4 test sample 3; because the test process is a closed space, the die and the sample are heated simultaneously, and the influence of factors such as heat conduction, heat convection, heat radiation and the like on the temperature of the sample 3 is ignored;
arranging the bulge of the male die 2 opposite to the groove of the female die 4, and arranging the sample 3 on the groove of the female die 4; in consideration of the test, the sample 3 and the die are both coated with high-temperature lubricants, so that the friction coefficient in the simulation model can be set to be 0.1-0.15;
according to the actual situation of the test, setting the loading speed of the male die 2 to be 10mm/min and the loading time to be 3 min;
refining grids of a to-be-bent area of the sample 3, wherein the grids are hexahedral grids, temperature-related units C3D8T are selected as the units, and the ALE grid self-adaptive technology is adopted to prevent the grid distortion of the sample 3 during large deformation;
submitting calculation and extracting calculation results, specifically extracting data such as maximum load, stress-strain curves and rebound curves;
and comparing the test result with the simulation result, specifically comparing the maximum load, the stress-strain curve, the rebound curve and the like obtained by the test and the simulation respectively, and correcting the material input parameters in the numerical simulation model according to the difference of the results until an accurate numerical simulation model is obtained.
In the embodiment of the invention, when a constitutive model of a corresponding material in simulation software is combined to perform reverse-estimation fitting on test data, an obtained stress-strain curve under a large deformation condition is specifically shown in fig. 3, the reverse-estimation curve is determined by a constitutive equation and has certain human factors, under the same test data, 3 curves (alpha, gamma and beta) or even more curves shown in fig. 3 may exist, a proper curve is selected to perform multiple-cycle calculation and is compared with the curve obtained by the test each time, and if the calculation result of the curve is close to the test result, the numerical simulation model established by the curve is a reliable numerical simulation model.
The hot bending forming clamp, the testing machine and the numerical simulation method provided by the invention can quickly obtain the hot bending process parameters of different metal samples, and the process parameters of the sample hot bending obtained based on the test can be used for establishing an accurate hot bending simulation model by reverse thrust so as to provide a basis for the modeling of a complex model of a subsequent related process, and have the advantages of simplicity and convenience in operation, high precision and cost saving.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications may be made to the technical solution of the invention, and in order to avoid unnecessary repetition, various possible combinations of the invention will not be described further. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.