A testing device and method for the right-angle limit bending radius of a metal material

Abstract

The application provides a metal material right-angle limit bending radius testing device and testing method, relates to the metal plate forming performance testing technical field, and includes a driving oil cylinder, a punch, a base, a rotary driving assembly and a control assembly. One end of the driving oil cylinder is connected with a hydraulic cylinder shaft. The punch is provided with a plurality of round corners. The base is arranged on one side of the punch. The rotary driving assembly drives the punch to rotate. The metal material right-angle limit bending radius testing device can adopt a manual testing method. The manual rotary handle is manually operated to rotate the punch, so that the required round corner punch is in the testing position, that is, directly opposite the V-shaped groove of the base, and the operation is more convenient. The metal material right-angle limit bending radius testing device can adopt an automatic testing method. The control switch is closed, the acceleration sensor is powered on, the device is switched to the automatic replacement of different round corner punch mode, the automatic switching of the punch round corner for testing can be realized, the operation is simple, the testing efficiency is improved, and the safety is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sheet metal forming performance testing, in particular to a device and method for testing the right-angle limit bending radius of a metal material. BACKGROUND

[0002] The right-angle limit bending radius is a bending radius at which a sample is bent to 90 degrees without cracks or significant depressions in the bending area when a series of different round corners R of a punch are used to bend the sample. This performance can be used to evaluate the bending performance of the sheet metal, and the smaller the minimum bending radius value, the better the bending performance. It can also be used to evaluate the shape stability of the sheet metal after forming due to springback. The right-angle limit bending radius is one of the important indicators for evaluating the forming performance of the material, directly affects the selection of the bending round corner during part design, and is one of the important performances for testing the forming performance of the material.

[0003] Currently, the commonly used bending test equipment is a V-bending press, etc. This type of equipment loads the punch by hydraulic drive, and makes the long sample press into a right-angle base. The equipment is equipped with a certain number of punches with different round corners R. During the test, different round corner R punches are replaced one by one from small to large, until cracks appear in the bending area of the sample, i.e. the test is stopped, and the round corner radius obtained at this time is the right-angle limit bending radius. During the entire test process, the punch needs to be replaced frequently, the process is complex and tedious, different round corner punches cannot be automatically replaced for testing, the test efficiency is low, and there are certain safety hazards during the replacement process. SUMMARY

[0004] The purpose of the present application is to provide a device and method for testing the right-angle limit bending radius of a metal material, which has the advantages of being able to use different round corners to bend the sample for testing, being more convenient to operate, being able to use manual or automatic testing methods, being able to automatically switch the round corner of the punch for testing, being easy to operate, improving the test efficiency, and improving the safety, so as to solve the problems in the background art.

[0005] To achieve the above purpose, the present application provides the following technical solutions:

[0006] A device for testing the right-angle limit bending radius of a metal material, comprising:

[0007] A drive oil cylinder, one end of which is connected with a hydraulic cylinder shaft, and the drive oil cylinder drives the hydraulic cylinder shaft to move up and down;

[0008] A punch, which is provided with a plurality of round corners, and the hydraulic cylinder shaft is connected with the punch and drives the punch to move up and down through the drive oil cylinder;

[0009] The base is arranged on one side of the punch, the driving oil cylinder drives the hydraulic cylinder shaft and the punch to move downward, and one end of the punch extends into the base under the driving of the driving oil cylinder;

[0010] The rotating driving assembly is connected with the punch and drives the punch to rotate to switch different round corners for bending test, the punch with switched round corner moves downward into the base under the driving of the driving oil cylinder, and the sample on the base is pressed and bent;

[0011] The control assembly is connected with the rotating driving assembly, the control assembly controls the rotating driving assembly to automatically rotate to drive the punch to rotate to switch different round corners, the punch with switched round corner moves downward into the base under the driving of the driving oil cylinder, and the sample on the base is pressed and bent, and the punch uses different round corners to perform bending test on the sample.

[0012] As a further scheme of the present application, the punch is provided with six round corners, the number of the punch is two, and the punch is connected with a punch locking nut;

[0013] The middle part of the punch is connected with a punch connecting shaft, the punch connecting shaft is provided with a connecting shaft bearing, one end of the hydraulic cylinder shaft is connected with the driving oil cylinder, and the other end is connected with the punch connecting shaft through the connecting shaft bearing, and the two punches are fixedly connected to the two ends of the punch connecting shaft through the punch locking nut;

[0014] The base is provided with a V-shaped groove, and the V-shaped groove is matched with the round corners of the punch.

[0015] As a further scheme of the present application, the punch is provided with three sets, each corner of each set of punch is a different round corner, the smallest radius is 0.5 mm, and the radius increases by 0.1 mm in sequence, and the largest radius is 2.2 mm, the corresponding radius of the small round corner punch 2 is 0.5 mm to 1.0 mm, the corresponding radius of the medium round corner punch 2 is 1.1 mm to 1.6 mm, and the corresponding radius of the large round corner punch 2 is 1.7 mm to 2.2 mm.

[0016] As a further scheme of the present application, a manual rotating handle is arranged on the side surface of the punch, the punch is rotated on the punch connecting shaft through the manual rotating handle, the punch is switched to different round corners, and the sample is subjected to bending test.

[0017] As a further scheme of the present application, the rotating driving assembly comprises:

[0018] An acceleration sensor is connected to the side surface of the hydraulic cylinder shaft;

[0019] A driving wheel is provided with a plurality of driving wheels;

[0020] photoelectric sensor;

[0021] a driving motor, which is installed in a lug on one end of the hydraulic cylinder shaft;

[0022] a driving system support frame, an output shaft of the driving motor is connected with the driving system support frame, and the driving wheel and the photoelectric sensor are connected to the driving system support frame;

[0023] a punch rotating disc, which is connected to the punch, passes through the driving wheel and the photoelectric sensor, and is in direct contact with the driving wheel;

[0024] the driving motor drives the driving system support frame to rotate, the driving system support frame drives the driving wheel to rotate, the driving wheel drives the punch rotating disc to rotate, and the punch rotating disc drives the punch to rotate, so that the punch automatically switches different round corners for bending test.

[0025] As a further scheme of the present application, the control assembly comprises an automatic switching control assembly and an automatic control assembly, and the automatic switching control assembly comprises:

[0026] a control switch;

[0027] a power supply one, which is electrically connected with the control switch and the acceleration sensor respectively, and controls the acceleration sensor to be powered on or powered off, and switches the device to the mode of automatically replacing different round corner punches;

[0028] the automatic control assembly comprises:

[0029] a signal trigger switch, which is electrically connected with the acceleration sensor;

[0030] a power supply two, which is electrically connected with the signal trigger switch;

[0031] an iron core, which is electrically connected with the power supply two, and is powered by the power supply two;

[0032] an armature control switch, which is connected with the iron core, and is triggered to be turned on when the iron core generates a magnetic field and the power supply two supplies power to the iron core;

[0033] a power supply three, which is electrically connected with the photoelectric sensor.

[0034] Based on the same inventive concept, the present application further provides a metal material right-angle limit bending radius test method, which comprises a metal material right-angle limit bending radius manual test method, and the metal material right-angle limit bending radius manual test method comprises:

[0035] The control switch is opened, and the device is in a manual operation mode at this time;

[0036] According to the use requirement, the manual rotating handle is operated to rotate the convex die, so that the required round corner convex die is in a test position, that is, is opposite to the V-shaped groove of the base;

[0037] The sample is placed, the hydraulic system is operated, the convex die is contacted with the base by the hydraulic cylinder shaft, pressure maintaining is performed for 3-5s, the hydraulic cylinder shaft is lifted, the sample is taken out, and the test is completed;

[0038] The same method is adopted, and other round corner convex dies are used to test the right angle limit bending radius of the metal material.

[0039] As a further scheme of the present application, the metal material right angle limit bending radius test method comprises a metal material right angle limit bending radius automatic test method, and the metal material right angle limit bending radius automatic test method comprises:

[0040] The control switch is closed, the acceleration sensor is powered on, and the device is switched to an automatic replacement of different round corner convex die mode;

[0041] The sample is placed, the device is started, and the sample is punched;

[0042] When the acceleration sensor monitors the upward movement of the hydraulic cylinder shaft, a starting signal is sent;

[0043] After the signal trigger switch receives the starting signal, the switch is closed;

[0044] The power supply two-way iron core is powered, a magnetic field is generated on the coil of the iron core, and the armature control switch is triggered to be closed;

[0045] The power supply three-way photoelectric sensor is powered, and the driving motor switch is triggered to be closed at the same time;

[0046] After the driving motor is powered on, the driving wheel is driven to rotate through the driving system support frame;

[0047] The convex die rotating disc is driven to rotate by the driving wheel, and the convex die is driven to rotate.

[0048] As a further scheme of the present application:

[0049] When the convex die moves to the next round corner convex die, the corresponding inner convex die rotating disc slot position is reached;

[0050] After the photoelectric sensor monitors the slot position, a stop signal is sent;

[0051] After the signal trigger switch receives the stop signal, the signal trigger switch is opened;

[0052] The power supply two stops supplying power to the iron core, the magnetic field of the coil of the iron core disappears, and the armature control switch is triggered to be opened under the action of the spring;

[0053] The power supply stops supplying power to the photoelectric sensor, and simultaneously triggers the driving motor switch to open;

[0054] The driving motor stops running, and the punch disc also stops running;

[0055] The punch stops at a new round corner punch, realizing automatic replacement of the round corner punch, and the operating device carries out bending radius testing.

[0056] As a further scheme of the present application, the initial round corner radius of the automatic replacement round corner punch mode adopts the current initial value of the device, or is adjusted by using the manual operation mode.

[0057] The control switch is opened, the manual rotating handle is operated, the punch is rotated, and the required round corner punch is positioned at the testing position, i.e., is opposite to the V-shaped groove of the base, i.e., satisfies the setting requirement.

[0058] Compared with the prior art, the present application has the following beneficial effects:

[0059] 1. The punch of the metal material right-angle limit bending radius testing device has multiple different round corners, the punch can use different round corners to test the sample, and the operation is more convenient.

[0060] 2. The metal material right-angle limit bending radius testing device can use a manual testing method, the manual rotating handle is manually operated, the punch is rotated, and the required round corner punch is positioned at the testing position, i.e., is opposite to the V-shaped groove of the base, and the operation is more convenient.

[0061] 3. The metal material right-angle limit bending radius testing device can use an automatic testing method, the control switch is closed, the acceleration sensor is powered on, the device is switched to the automatic replacement different round corner punch mode, the punch round corner can be automatically switched for testing, the operation is simple, the testing efficiency is improved, and the safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0062] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0063] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings. In the following description, the same reference numerals represent the same parts.

[0064] Figure 1 The present application is a structure schematic diagram of the device.

[0065] Figure 2A perspective view of the device of the present application.

[0066] Figure 3 A structural schematic view of the driving assembly of the device of the present application.

[0067] Figure 4 A partial structural schematic view of the device of the present application.

[0068] Figure 5 A perspective view of Figure 4 the structure.

[0069] Figure 6 A circuit diagram of the control assembly of the device of the present application.

[0070] Identified in the figure:

[0071] 1. Hydraulic cylinder shaft; 2. Punch; 3. Hand rotating handle;

[0072] 4. Punch locking nut; 5. Base; 6. Test sample;

[0073] 7. Acceleration sensor; 8. Driving wheel; 9. Photoelectric sensor;

[0074] 10. Driving motor; 11. Connecting shaft bearing; 12. Punch connecting shaft;

[0075] 13. Driving system support frame; 14. Punch rotating disc; 15. Control switch;

[0076] 16. Power supply one; 17. Signal trigger switch; 18. Power supply two;

[0077] 19. Iron core; 20. Armature control switch; 21. Power supply three;

[0078] 5a. V-shaped groove. DETAILED DESCRIPTION

[0079] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0080] The present application provides a metal material right-angle limit bending radius testing device, please refer to the drawings of the present application embodiment Figures 1-2 , comprising:

[0081] The driving oil cylinder is fixedly connected with the hydraulic cylinder shaft 1 at one end, and drives the hydraulic cylinder shaft 1 to move up and down;

[0082] The punch 2 is provided with a plurality of fillets, the hydraulic cylinder shaft 1 is connected with the punch 2, and the punch 2 is driven to move up and down by the driving oil cylinder, and the test sample 6 is bent by the fillets to perform the test;

[0083] The base 5 is arranged on one side of the punch 2, the driving oil cylinder drives the hydraulic cylinder shaft 1 and the punch 2 to move downwards, one end of the punch 2 extends into the base 5 under the driving of the driving oil cylinder, and the fillets of the punch 2 also extend into the base 5, and the test sample 6 in the base 5 is bent by the fillets of the punch 2 to perform the test; the base 5 is provided with a V-shaped groove 5a, the V-shaped groove 5a is matched with the fillets of the punch 2, the fillets of the punch 2 also extend into the V-shaped groove 5a of the base 5, and the test sample 6 in the V-shaped groove 5a is bent by the fillets of the punch 2 to perform the test;

[0084] The rotary driving assembly is connected with the punch 2 and drives the punch 2 to rotate to switch different fillets to perform the bending test, the punch 2 after switching the fillets is driven to move downwards into the base 5 by the driving oil cylinder, and the test sample 6 on the base 5 is pressed and bent downwards to perform the bending test of the test sample 6 by different fillets;

[0085] The control assembly is connected with the rotary driving assembly, the control assembly controls the rotary driving assembly to rotate automatically to drive the punch 2 to rotate to switch different fillets, the punch 2 after switching the fillets is driven to move downwards into the base 5 by the driving oil cylinder, and the test sample 6 on the base 5 is pressed and bent downwards, and the punch 2 uses different fillets to perform the bending test on the test sample 6.

[0086] The punch 2 of the metal material right-angle limit bending radius test device has a plurality of different fillets, the punch 2 can use different fillets to perform the bending test on the test sample 6, and the operation is more convenient; the metal material right-angle limit bending radius test device can adopt a manual test method, a manual rotary handle 3 is manually operated to rotate the punch 2, and the required fillet punch 2 is in a test position, that is, opposite to the V-shaped groove 5a of the base 5, and the operation is more convenient; the metal material right-angle limit bending radius test device can adopt an automatic test method, the control switch 15 is closed, the acceleration sensor 7 is powered on, the device is switched to an automatic replacement different fillet punch 2 mode, the punch 2 fillets can be automatically switched to perform the test, the operation is simple, the test efficiency is improved, and the safety is improved.

[0087] In a preferred embodiment of the present application, the punch 2 is provided with six fillets, and can also be provided with other numbers of fillets, the number of the punch 2 is two, and the punch 2 is fixedly connected with the punch locking nut 4;

[0088] Please refer to the accompanying Figure 3The middle part of the male die 2 is rotatably connected with a male die connecting shaft 12, the male die connecting shaft 12 is fixedly installed with a connecting shaft bearing 11, one end of the hydraulic cylinder shaft 1 is fixedly connected with a driving oil cylinder, the other end is connected with the male die connecting shaft 12 through the connecting shaft bearing 11, and the two male dies 2 are fixedly connected to the two ends of the male die connecting shaft 12 through male die locking nuts 4.

[0089] Please refer to the accompanying drawings Figures 1-2 In a preferred embodiment of the present application, the male die 2 is provided with three sets, each corner of each set of the male die 2 is a different round corner, the smallest radius is 0.5 mm, sequentially increases by 0.1 mm, and the largest radius is 2.2 mm, the small round corner of the male die 22 corresponds to a radius of 0.5 mm to 1.0 mm, the middle round corner of the male die 22 corresponds to a radius of 1.1 mm to 1.6 mm, and the large round corner of the male die 22 corresponds to a radius of 1.7 mm to 2.2 mm; the sample 6 in the base 5 is bent through different round corners of the male die 2, so as to switch different round corners for bending test.

[0090] Please refer to the accompanying drawings Figures 1-2 In a preferred embodiment of the present application, the side surface of the male die 2 is fixedly installed with a manual rotating handle 3, different round corners can be switched in a manual mode, that is, the male die 2 is rotated on the male die connecting shaft 12 through the manual rotating handle 3, different round corners of the male die 2 are switched, and the sample 6 is subjected to bending test.

[0091] In a preferred embodiment of the present application, please refer to the accompanying drawings 3-5, the rotating driving assembly comprises:

[0092] An acceleration sensor 7 is fixedly connected to the side surface of the hydraulic cylinder shaft 1 and detects the movement of the hydraulic cylinder shaft 1;

[0093] A driving wheel 8 is provided with a plurality of driving wheels 8, and specifically four driving wheels 8;

[0094] A photoelectric sensor 9;

[0095] A driving motor 10 is installed in the lug at one end of the hydraulic cylinder shaft 1;

[0096] A driving system support frame 13 is connected with the output shaft of the driving motor 10, and the driving wheel 8 and the photoelectric sensor 9 are connected to the driving system support frame 13;

[0097] A male die rotating disc 14 is fixedly connected to the male die 2, the male die rotating disc 14 penetrates through the driving wheel 8 and the photoelectric sensor 9, and the male die rotating disc 14 is in direct contact with the driving wheel 8;

[0098] The driving motor 10 drives the driving system support frame 13 to rotate, the driving system support frame 13 drives the driving wheel 8 to rotate, since the driving motor 10 is a fixed device, the driving wheel 8 drives the punch disc 14 to rotate, and further drives the punch 2 to rotate, so that the punch 2 automatically switches different round corners to perform bending test.

[0099] In a preferred embodiment of the present application, please refer to the accompanying drawings Figure 6 The control assembly comprises an automatic switching control assembly and an automatic control assembly, the automatic switching control assembly is connected to the punch 2, and the automatic switching control assembly comprises:

[0100] The control switch 15;

[0101] The power supply one 16 is electrically connected with the control switch 15 and the acceleration sensor 7 respectively, the control switch 15 controls the acceleration sensor 7 to be powered on or powered off, and the device is switched to the mode of automatically replacing the punch 2 with different round corners, that is, the mode of automatically switching the manual adjustment of the round corner of the punch 2 or the automatic adjustment of the round corner of the punch 2;

[0102] In a preferred embodiment of the present application, the automatic control assembly is connected to the punch 2, and the automatic control assembly comprises:

[0103] The signal trigger switch 17 is electrically connected with the acceleration sensor 7;

[0104] The power supply two 18 is electrically connected with the signal trigger switch 17;

[0105] The iron core 19 is electrically connected with the power supply two 18, and the power supply two 18 supplies power to the iron core 19;

[0106] The armature control switch 20 is connected with the iron core 19, the power supply two 18 supplies power to the iron core 19, the iron core 19 generates a magnetic field, and triggers the armature control switch 20 to be closed;

[0107] The power supply three 21 is electrically connected with the photoelectric sensor 9.

[0108] Based on the same inventive concept, the present application also provides a metal material right-angle limit bending radius test method, the metal material right-angle limit bending radius test method comprises a metal material right-angle limit bending radius manual test method, the manual test method is a method of manually adjusting different round corners of the punch 2 to perform bending test, and the metal material right-angle limit bending radius manual test method comprises:

[0109] The control switch 15 is turned on, at this time, the device is in a manual operation mode, that is, the different round corners of the punch 2 are manually adjusted;

[0110] According to the use requirement, the manual rotating handle 3 is operated, the punch 2 rotates along the punch connecting shaft 12, the punch 2 is rotated, and the required round corner punch 2 is in the test position, that is, opposite to the V-shaped groove 5a of the base 5;

[0111] The sample 6 is placed, the hydraulic system is operated, the punch 2 is driven by the hydraulic cylinder shaft 1, the round corner of the punch 2 is in contact with the sample 6 on the base 5, the pressure is maintained for 3-5 s, the round corner continuously punches the sample 6, and the sample 6 is bent, the hydraulic cylinder shaft 1 is lifted, the sample 6 is taken out, and the test is completed;

[0112] By using the same method, the punch 2 can be rotated by the manual rotating handle 3, and other round corner punches 2 are used to test the right-angle limit bending radius of the metal material.

[0113] In a preferred embodiment of the present application, the metal material right-angle limit bending radius test method includes a metal material right-angle limit bending radius automatic test method, and the automatic test method is a method for automatically adjusting different round corners of the punch 2 to perform the bending test.

[0114] The control switch 15 is closed, the acceleration sensor 7 is powered on, and the device is switched to the mode of automatically replacing different round corner punches 2;

[0115] The sample 6 is placed on the base 5, the device is started, the round corner of the punch 2 driven by the hydraulic cylinder shaft 1 is in contact with the sample 6 on the base 5, the pressure is maintained for 3-5 s, the round corner continuously punches the sample 6, and the sample 6 is bent;

[0116] When the acceleration sensor 7 monitors the upward movement of the hydraulic cylinder shaft 1, a signal is sent;

[0117] After the signal trigger switch 17 receives the start signal, the switch is closed;

[0118] The power supply two 18 supplies power to the iron core 19, the coil on the iron core 19 generates a magnetic field, attracts the armature control switch 20, and triggers the armature control switch 20 to close;

[0119] The power supply three 21 supplies power to the photoelectric sensor 9, and simultaneously triggers the driving motor 10 to close;

[0120] After the driving motor 10 is powered on, the driving motor 10 is started, the driving motor 10 drives the driving system support frame 13 to operate, and drives the driving wheel 8 to operate through the driving system support frame 13;

[0121] The driving wheel 8 drives the punch rotating disc 14 to operate, and drives the punch 2 to operate, so as to adjust different round corners of the punch 2 to perform the bending test.

[0122] As a further scheme of the present application:

[0123] When the punch 2 moves to the next round corner punch 2, the corresponding inner punch turntable 14 slot position;

[0124] After the photoelectric sensor 9 monitors the slot position, a stop signal is sent out;

[0125] After the signal trigger switch 17 receives the stop signal, the signal trigger switch 17 is opened;

[0126] The power supply two 18 stops supplying power to the iron core 19, the coil magnetic field of the iron core 19 disappears, the attractive force disappears, and the trigger armature control switch 20 is opened under the action of the spring;

[0127] The power supply three 21 stops supplying power to the photoelectric sensor 9, and at the same time, the trigger drive motor 10 switch is opened;

[0128] The drive motor 10 stops running, and at the same time, the drive system support frame 13 stops running, and the punch turntable 14 also stops running;

[0129] The punch 2 stops at the new round corner punch 2, realizing the automatic replacement of the round corner punch 2, and the device is operated to test the bending radius;

[0130] According to the above test method, the operation is repeated until the large round corner radius test is completed, and the medium round corner radius test can be continued on the inner side; if it is necessary to continue to test the small round corner radius, the punch locking nut 4 is unscrewed, the medium round corner hexagonal punch 2 is replaced with a small round corner hexagonal punch 2, and the test is continued, and the test is directly completed;

[0131] During the test, the round corner radius of the punch 2 is replaced in order from large to small, and when the punch 2 of any round corner is tested, cracks appear in the bending area of the sample 6, and the test is stopped at this time, and the round corner radius obtained is the right angle limit bending radius.

[0132] In a preferred embodiment of the present application, the initial round corner radius of the automatic round corner punch 2 replacement mode can use the current initial value of the device, or can also use the manual operation mode for adjustment;

[0133] The control switch 15 is opened, the manual rotating handle 3 is operated, the punch 2 is rotated, the round corner is rotated with the punch 2, and the round corner punch 2 required is placed in the test position, that is, opposite to the V-shaped groove 5a of the base 5, that is, to meet the setting requirements.

[0134] The convex die 2 of the metal material right angle limit bending radius testing device has multiple different fillets, the convex die 2 can use different fillets to perform bending test on the sample 6, and the operation is more convenient; the metal material right angle limit bending radius testing device can adopt a manual testing method, the manual rotating handle 3 is manually operated to rotate the convex die 2, so that the required fillet convex die 2 is in the testing position, that is, opposite to the V-shaped groove 5a of the base 5, and the operation is more convenient; the metal material right angle limit bending radius testing device can adopt an automatic testing method, the control switch 15 is closed, the acceleration sensor 7 is powered on, the device is switched to the mode of automatically replacing different fillet convex dies 2, and the automatic switching of the fillet of the convex die 2 for testing can be realized, the operation is simple, the testing efficiency is improved, and the safety is improved.

[0135] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0136] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features.

[0137] The principles and implementation modes of the present application are described by applying specific examples in the description of the present application, and the above embodiment descriptions are only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and according to the above, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A device for testing the bend radius of a metal material at a right angle limit, characterized by, It includes: The driving oil cylinder is connected with a hydraulic cylinder shaft at one end, and drives the hydraulic cylinder shaft to move up and down. The male die is provided with a plurality of fillets, the hydraulic cylinder shaft is connected with the male die, and the male die is driven by the driving oil cylinder to move up and down. The base is arranged on one side of the male die, the driving oil cylinder drives the hydraulic cylinder shaft and the male die to move downward, and one end of the male die driven by the driving oil cylinder extends into the base. The rotary drive assembly is connected with the male die and drives the male die to rotate to switch different fillets for bending test, the male die after switching the fillet is driven by the driving oil cylinder to move downward into the base and press the sample on the base for bending. The control assembly is connected with the rotary drive assembly, the control assembly controls the rotary drive assembly to rotate automatically to drive the male die to rotate to switch different fillets, the male die after switching the fillet is driven by the driving oil cylinder to move downward into the base and press the sample on the base for bending, and the male die uses different fillets to perform bending test on the sample.

2. The device for testing the straight bending radius of a metal material according to claim 1, wherein The male die is provided with six fillets, the number of the male die is two, and the male die is connected with a male die locking nut. The male die is connected with a male die connecting shaft at the middle part, the male die connecting shaft is provided with a connecting shaft bearing, one end of the hydraulic cylinder shaft is connected with the driving oil cylinder, the other end is connected with the male die connecting shaft through the connecting shaft bearing, and the two male dies are fixedly connected with the two ends of the male die connecting shaft through the male die locking nut. The base is provided with a V-shaped groove, and the V-shaped groove is matched with the fillets of the male die.

3. The device of claim 1, wherein the device is configured to test a bend radius of a metal material at a right angle limit. The male die is provided with three sets, each angle of each set of the male die is a different fillet, the smallest radius is 0.5mm, the radius increases by 0.1mm in turn, and the largest radius is 2.2mm, the small fillet of the male die 2 corresponds to a radius of 0.5mm-1.0mm, the middle fillet of the male die 2 corresponds to a radius of 1.1mm-1.6mm, and the large fillet of the male die 2 corresponds to a radius of 1.7mm-2.2mm.

4. The device of claim 1, wherein the device is configured to test a bend radius of a metal material at a right angle limit. A manual rotating handle is arranged on the side surface of the male die, the male die is rotated on the male die connecting shaft through the manual rotating handle, different fillets of the male die are switched, and the sample is subjected to bending test.

5. The device of claim 1, wherein the device is configured to test a bend radius of a metal material at a right angle limit. The rotary drive assembly includes: An acceleration sensor is connected to the side surface of the hydraulic cylinder shaft. The driving wheel is provided with a plurality of driving wheels. A photoelectric sensor is arranged. The driving motor is installed in the lug at one end of the hydraulic cylinder shaft. The output shaft of the driving motor is connected with the driving system support frame, the driving wheel and the photoelectric sensor are connected to the driving system support frame. The male die turntable is connected to the male die, the male die turntable passes through the driving wheel and the photoelectric sensor, and the male die turntable directly contacts with the driving wheel. The driving motor drives the driving system support frame to rotate, the driving system support frame drives the driving wheel to rotate, the driving wheel drives the male die turntable to rotate, and the male die turntable drives the male die to rotate, so that the male die automatically switches different fillets for bending test.

6. A device for testing the straight bend radius limit of a metal material according to claim 5, wherein The control assembly comprises an automatic switching control assembly and an automatic control assembly, and the automatic switching control assembly comprises: a control switch; a power supply one, which is electrically connected with the control switch and the acceleration sensor respectively, and controls the power-on and power-off of the acceleration sensor, and the device switches to the mode of automatically replacing different round corner punches; the automatic control assembly comprises: a signal trigger switch, which is electrically connected with the acceleration sensor; a power supply two, which is electrically connected with the signal trigger switch; an iron core, which is electrically connected with the power supply two and is powered by the power supply two; an armature control switch, which is connected with the iron core, and the power supply two powers the iron core to generate a magnetic field to trigger the armature control switch to be closed; a power supply three, which is electrically connected with the photoelectric sensor.

7. A method of testing a bend radius of a metal material at a right angle limit, based on the device for testing a bend radius of a metal material at a right angle limit according to any one of claims 1 to 6, characterized by, The metal material right-angle limit bending radius test method comprises a metal material right-angle limit bending radius manual test method, which comprises: turning on the control switch, at which time the device is in a manual operation mode; according to the use requirement, operating the manual rotary handle to rotate the punch, so that the required round corner punch is in a test position, i.e. directly opposite the V-shaped groove of the base; placing the test sample, operating the hydraulic system, and the hydraulic cylinder shaft drives the punch to contact the base, and the pressure is maintained for 3-5 seconds, the hydraulic cylinder shaft is lifted, the test sample is taken out, and the test is completed; using the same method, other round corner punches are used to test the right-angle limit bending radius of the metal material.

8. The method of claim 7, wherein the bend radius is 0.5 times the thickness of the metal material. The metal material right-angle limit bending radius test method comprises a metal material right-angle limit bending radius automatic test method, which comprises: ​ turning off the control switch, the acceleration sensor is powered on, and the device switches to the mode of automatically replacing different round corner punches; placing the test sample, starting the device, and punching the test sample; when the acceleration sensor monitors the upward movement of the hydraulic cylinder shaft, a signal is sent out; after the signal trigger switch receives the start signal, the switch is closed; the power supply two powers the iron core, the coil on the iron core generates a magnetic field, and the armature control switch is triggered to be closed; the power supply three powers the photoelectric sensor, and simultaneously triggers the driving motor switch to be closed; after the driving motor is powered on, the driving system support frame drives the driving wheel to rotate; the driving wheel drives the punch turntable to rotate, and drives the punch to rotate.

9. The metal material right-angle limit bending radius test method according to claim 7, wherein when the punch moves to the next round corner punch, the corresponding inner punch turntable slot position is reached; after the photoelectric sensor monitors the slot position, a stop signal is sent out; after the signal trigger switch receives the stop signal, the signal trigger switch is opened; the power supply two stops powering the iron core, the coil magnetic field of the iron core disappears, and the armature control switch is triggered to be opened under the action of the spring; the power supply three stops powering the photoelectric sensor, and simultaneously triggers the driving motor switch to be opened; the driving motor stops rotating, and the punch turntable also stops rotating; the punch stops at the new round corner punch, the round corner automatic replacement of the punch is realized, and the device is operated to test the bending radius.

10. A method for testing the right-angle limit bending radius of a metal material according to claim 7, characterized in that: The initial corner radius of the automatic change corner punch mode is adopted as the current initial value of the device or adjusted in the manual operation mode; Open the control switch, operate the manual rotary handle, rotate the punch, and place the required corner punch in the test position, i.e. directly opposite the V-shaped groove of the base, i.e. meet the setting requirements.

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