Multifunctional full-automatic tensile test system

Abstract

The invention relates to the technical field of tensile test equipment, in particular to a multifunctional full-automatic tensile test system, a mechanical clamping jaw comprises two supporting seats, a plurality of groups of clamping fingers are arranged between the two supporting seats along a straight line, and the plurality of groups of clamping fingers comprise a clamping finger and an orthopedic clamping finger; the clamping fingers comprise side vertical clamping plates arranged at the corresponding positions of the two supporting seats, the orthopedic clamping fingers comprise long strip plates arranged at the corresponding positions of the two supporting seats, the cross section of each long strip plate is in an arc shape, samples which are not prone to being bent, such as deformed steel bars, can be stably clamped through the clamping fingers, and the clamping fingers are not prone to being bent. The end portion of the clamped sample extends to the preset position, then the sample can be matched with a stretching detection device, for the sample easy to bend, such as a steel strand, the sample is clamped through the shape righting clamping fingers, the shape righting clamping fingers are two long strip plates which are matched with each other, the cross section of each long strip plate is in an arc shape, then the steel strand is clamped by a certain length, and then the shape righting effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of tensile testing equipment, and in particular to a multifunctional fully automatic tensile testing system. Background Art

[0002] Tensile testing is a process used to detect the tensile properties of a sample, thereby determining the tensile strength of the sample and ensuring the performance of the product corresponding to the sample.

[0003] In order to realize fully automatic tensile test, technicians in this field have designed a fully automatic tensile test method for HRB400E and HRB500E steel bars. The robot grabs the sample and transmits it to the loading and unloading unit, and the manipulator clamps the sample to read the coding information. The weight and length are transmitted to the hydraulic push clamp by the robot. After the testing machine clamp is clamped, the video extensometer automatically tracks and completes the tensile test. After the test, the broken sample is removed by the manipulator and placed in the broken sample receiving car. The video extensometer transmits the tensile test data to the system. The mechanical performance indicators of the tensile sample are obtained through system analysis and calculation, which can meet the detection of samples with higher hardness. However, for samples that are easy to bend, it is impossible to clamp them stably. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a multifunctional fully automatic tensile testing system capable of stably testing a variety of specimens.

[0005] The present invention is realized by the following technical scheme: a multifunctional fully automatic tensile testing system, comprising a sample pretreatment module, a sample detection module and a control module, The sample preprocessing module includes a sample storage device; The sample detection module includes an appearance detection device, a weight detection device and a stretch detection device; The control module includes a central control console and a sample transport device, and the sample transport device transfers the sample between the sample pretreatment module and the sample detection module. The sample transport device includes a mechanical arm, the mechanical arm is connected to a mechanical clamp, the mechanical clamp includes two support seats, and multiple groups of clamping fingers are arranged along a straight line between the two support seats. The shape detection device includes a length detection device, and the length detection device encodes the length information of the sample when detecting the length of the sample. The multiple groups of clamping fingers include clamping fingers and orthopedic clamping fingers. The clamping fingers include side clamping plates arranged at corresponding positions on two support seats. The orthopedic clamping fingers include long strips arranged at corresponding positions on two support seats. The cross-section of the long strips is arc-shaped.

[0006] Furthermore, the sample storage device comprises a rack, on which a plurality of coding areas for storing samples are arranged.

[0007] Furthermore, the sample detection module includes a weighing and length measuring frame, the shape detection device and the weight detection device are arranged on the weighing and length measuring frame, and the weighing and length measuring frame is also provided with a sample adjustment device for correcting the position of the sample, the sample adjustment device includes a sample clamp arranged on the weighing and length measuring frame, the sample clamp cooperates with the end of the sample, the sample clamp is connected to a rotation driving device, and the sample adjustment device also includes an angle detection device for detecting the angle state of the sample.

[0008] Furthermore, the stretching drive device of the stretching testing device includes a cylinder, a piston rod of the cylinder is connected to a jaw seat, a jaw slide is provided on the jaw seat, a jaw piece is installed on the jaw slide, a positioning device is provided between the jaw piece and the jaw slide, and a clamping cylinder for driving the jaw to move to clamp the sample is also installed on the jaw seat.

[0009] Furthermore, the clamping cylinder is driven by a hydraulic station, which includes an oil tank, a gear pump is installed on the oil tank, an oil filter is installed at the inlet end of the gear pump, a one-way valve is installed at the outlet end of the gear pump, and the clamping cylinder is controlled by an electromagnetic reversing valve.

[0010] Furthermore, the tensile testing device includes a hydraulic tensile testing machine, and a shock absorbing device is installed at the lower end of the hydraulic tensile testing machine. The shock absorbing device includes a plurality of shock absorbers evenly distributed at the lower end of the hydraulic tensile testing machine, and the shock absorber includes a base, and a support sleeve is sealed and installed on the upper end of the base, and an upward connecting column is installed in the support sleeve, which is connected to the hydraulic tensile testing machine through the connecting column, and a floating baffle ring is integrally formed on the connecting column, a buffer spring is installed between the lower end of the floating baffle ring and the base, an upper flange is installed at the upper end of the support sleeve, the connecting column passes through the upper flange upward, the upper flange is threadedly connected to the support sleeve, and is sealed by a sealing ring, and a force transmission spring is installed between the upper flange and the upper end of the floating baffle ring.

[0011] Furthermore, a buffer cavity matched with the connecting column is processed on the base, the lower end of the connecting column is inserted into the buffer cavity, the connecting column and the side wall of the buffer cavity are clearance matched, hydraulic oil is injected into the buffer cavity, and an oil storage cavity is formed between the connecting column and the support sleeve. The side wall of the buffer cavity is boss-shaped, and an oil storage ring is installed at the bottom of the support sleeve. A plurality of oil storage grooves are processed on the oil storage ring. The oil storage ring forms an isolation between the buffer cavity and the buffer spring, and also forms an overflow groove between the buffer cavity and the oil filling hole. An oil filling hole is also processed on the side wall of the support sleeve, and a plug is installed at the oil filling hole. The beneficial effects of the present invention are: 1. The mechanical clamp includes two support seats, and multiple groups of clamping fingers are arranged along a straight line between the two support seats. The multiple groups of clamping fingers include clamping fingers and orthopedic fingers. The clamping fingers include side clamping plates arranged at corresponding positions on the two support seats, and the orthopedic fingers include long strips arranged at corresponding positions on the two support seats. The cross section of the long strip is arc-shaped. For samples that are not easy to bend, such as threaded steel, the clamping fingers can stably clamp the sample. After clamping, the end of the sample extends to a predetermined position, so that it can cooperate with the tensile testing device. For samples that are easy to bend, such as steel strands, the orthopedic fingers are clamped. The orthopedic fingers are two long strips with arc-shaped cross sections that cooperate with each other, so as to clamp a length of the steel strand, thereby achieving an orthopedic effect. 2. A sample adjustment device is installed on the weighing and length measuring frame, and the sample adjustment device includes a sample clamping jaw arranged on the weighing and length measuring frame, the sample clamping jaw cooperates with the end of the sample, and the sample clamping jaw is connected to a rotating drive device. The sample adjustment device also includes an angle detection device for detecting the angle state of the sample. After the angle detection device detects the angle state of the sample, it drives the sample clamping jaw to rotate through the rotating drive device, and then drives the sample to rotate, and adjusts the matching angle between the sample and the jaws. In particular, when the sample is a threaded steel bar, the longitudinal rib of the sample is matched with the jaws to avoid the longitudinal rib of the steel bar being stuck to the clamp after the test machine clamps the longitudinal rib, so that the mechanical arm cannot be removed smoothly, resulting in system abnormality or damage to the mechanical arm clamping jaw. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the distribution of various devices in Example 1; Figure 2 It is a schematic diagram of the mechanical gripper structure; Figure 3 This is a schematic diagram of the weighing and length measuring frame structure; Figure 4 is a schematic cross-sectional view of the jaw seat; Figure 5 It is a top view schematic diagram of the position relationship between the jaw piece and the steel bar specimen with transverse and longitudinal ribs; Figure 6 is a schematic diagram of the shock absorber structure; Figure 7 It is a top view schematic diagram of the oil storage tank; Figure 8 This is a schematic diagram of the hydraulic station driving principle.

[0013] Among them: 1. Fence; 2. Material rack; 3. Robotic arm; 4. Mechanical gripper; 401. Driving seat; 402. Connecting seat; 403. Support seat; 404. Clamping finger; 405. Orthopedic finger; 5. Waste box; 6. Tensile testing device; 601. Jaw seat; 602. Jaw slide; 603. Positioning spring bead; 604. Jaw piece; 605. Clamping cylinder; 7. Hydraulic station; 8. Weighing and length measuring machine; 801. Weighing and length measuring machine frame; 802. Length measuring sensor; 803. Cross-section detection camera; 804. Upper clamping seat; 805. Pneumatic clamping jaws; 806. Lower clamping seat; 807. Sample clamping jaws; 808. Diameter measuring camera; 9. Center console; 10. Fixture frame; 11. Test specimen; 1101. Longitudinal rib; 1201, upper flange; 1202, sealing ring; 1203, force transmission spring; 1204, floating retaining ring; 1205, buffer spring; 1206, oil filling hole; 1207, ground bolt hole; 1208, buffer cavity; 1209, connecting column; 1210, positioning hole; 1211, oil storage ring; 1212, base; 1213, overflow groove; 1214, oil storage groove; 1215, support sleeve; 1301. Oil tank; 1302. Oil filter; 1303. Gear pump; 1304. One-way valve; 1305. Plate relief valve; 1306. Pressure switch controller; 1307. Solenoid reversing valve; 1308. Oil cylinder; 1309. Pressure gauge; 1310. Cooling fan; 1311. Temperature sensor. DETAILED DESCRIPTION

[0014] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0016] Example 1 like Figure 1-8 As shown, a multifunctional fully automatic tensile testing system includes a sample pretreatment module, a sample detection module, and a control module distributed in a fence 1.

[0017] The sample preprocessing module includes a sample storage device, which includes a rack 2. The rack 2 has multiple coding areas for storing samples 11. The rack 2 area is demarcated within the fence 1. The rack 2 has multiple racks or cavities for storing samples 11. Each rack or cavity is individually coded to obtain a coding area. The sample 11 that has undergone information collection is placed in the coding area and waits for detection. The preprocessing includes entering the sample 11 information and inspecting and judging the appearance of the sample 11.

[0018] The sample detection module includes an appearance detection device, a weight detection device and a stretching detection device 6, wherein the appearance detection device includes a length detection device, and the length detection device encodes the length information of the sample 11 when detecting the length of the sample 11. In this embodiment, the appearance detection device and the weighing detection device are integrated into a weighing and length measuring machine 8 to detect the weight and initial length of the sample 11.

[0019] The tensile testing device 6 is a hydraulic tensile testing machine, which includes an oil cylinder. The hydraulic tensile testing machine has two groups of jaw pieces 604, and the two groups of jaw pieces 604 correspond to the two end positions of the sample 11. In this embodiment, the oil cylinder 1308 is connected to the jaw seat 601, and the jaw slide 602 is nested and installed on the jaw seat 601. The jaw piece 604 is slidably installed on the jaw slide 602 through a linear slide rail or a dovetail slide rail. A positioning device is installed between the jaw piece 604 and the jaw slide 602. The positioning device specifically uses a positioning spring bead 603 to facilitate the replacement of the jaw piece 604 and the positioning of the jaw piece 604. A clamping oil cylinder 605 for driving the jaw piece 604 to clamp the sample 11 is also installed on the jaw seat 601. The jaw slide 602 is connected to the piston rod of the clamping oil cylinder 605 through a horizontal connecting groove, which is convenient for replacement and tensile testing.

[0020] At least one set of jaws 604 is connected to a tension detection device, and the tension curve is recorded during the tensile test. A test length measuring sensor for detecting the length value of the sample 11 is also installed at the upper end of the hydraulic tensile testing machine. The test length measuring sensor is a specifically selected FSL type length measuring sensor, which measures the initial length value of the sample 11 and the effective length value after clamping. The hydraulic tensile testing machine is installed with an outer diameter detection device for detecting the outer diameter of the sample 11. The clamping seat on the lower clamping seat of the outer diameter detection device uses a diameter measuring camera, which is installed in the middle of the two sets of jaws. Specifically, an RM403 camera is selected to detect the outer diameter data of the sample 11 in real time during the tensile test.

[0021] The sample detection module includes a weighing and length measuring frame, on which the shape detection device and the weight detection device are installed. An upper clamping seat 804 and a lower clamping seat 806 are installed in the weighing and length measuring frame 801, wherein the lower clamping seat 806 is located at the lower end of the frame, and the upper clamping seat 804 is located directly above the lower clamping seat 806. Pneumatic clamps 805 are installed on both the lower clamping seat 806 and the upper clamping seat 804. In some cases, the pneumatic clamps 805 can also be replaced by electric clamps or hydraulic clamps to clamp the upper and lower ends of the sample 11 respectively. The upper end of the weighing and length measuring frame 801 is also equipped with a pneumatic clamp 805 for detecting the sample 11. The length measuring sensor 802 for measuring the length value of the test sample 11 is specifically an FSL type length measuring sensor, which measures the initial length value of the sample 11. The weighing and length measuring frame 801 is also equipped with an outer diameter detection device for detecting the outer diameter of the sample 11. The outer diameter detection device is a diameter measuring camera 808, which is installed in the middle position of the upper clamping seat 804 and the lower clamping seat 806. Specifically, an RM403 camera is selected to detect the initial outer diameter data of the sample 11. The upper clamping seat 804 and the lower clamping seat 806 are installed on the weighing frame. The weight value of the sample 11 is obtained by detecting the weight change before and after clamping the sample 11.

[0022] During the tensile test, it was found that for the cross-sectional type of the steel bar sample with transverse and longitudinal ribs, when the longitudinal rib 1101 of the sample 11 is at the side position of the jaw piece 604, it can avoid the longitudinal rib 1101 being clamped by the testing machine and causing the longitudinal rib 1101 to stick to the clamp after fracture, thereby avoiding the inability of the mechanical arm 3 to be smoothly removed and the resulting system abnormality or damage to the mechanical clamp 4. In order to adjust the longitudinal rib 1101 of the sample 11 to the side position of the jaw piece 604, a sample adjustment device for correcting the position of the sample 11 is also installed on the weighing and length measuring frame 801. The sample adjustment device includes a sample clamp 807 installed on the weighing and length measuring frame 801. The sample clamp 807 A three-jaw chuck is selected, and the sample jaw 807 cooperates with the lower end of the sample 11. The lower end of the sample 11 is inserted into the three-jaw chuck. The sample jaw 807 is connected to a rotation drive device, which is a motor. The sample adjustment device also includes an angle detection device for detecting the angle state of the sample 11. The angle detection device includes a cross-section detection camera 803 installed on the upper end of the weighing and length measuring frame 801. The cross-section detection camera 803 uses a 3D camera. The 3D camera identifies the horizontal angle of the longitudinal rib 1101 and then feeds it back to the central console 9. The central console 9 controls the motor to rotate so that the longitudinal rib 1101 of the sample 11 moves into the side position of the rear jaw piece 604 of the hydraulic tensile testing machine.

[0023] The oil cylinder 605 is driven by the hydraulic station 7. During the tensile test, it was found that the hydraulic station 7 continued to work at high power during the operation of the oil cylinder 605. When the jaws 604 of the test machine clamped the sample, the oil cylinder 605 needed to be clamped to apply a force toward the center to the jaws 604 so that the jaws 604 could clamp the sample. After clamping, the oil cylinder 605 needed to be continuously applied with force during the test to ensure the stability of the tensile test. Therefore, there are two situations: 1. When clamping, high speed and low force are required; 2. During the test, low speed and high force are required; The previous oil source was designed for only one situation, which is to maintain medium speed and high force value continuously, which will cause a lot of energy loss, heat and noise. 1. The internal oil circuit pressure can be monitored through the pressure switch controller 1306. When the pressure reaches a certain value, the pressure switch controller 1306 will give a signal, and the central console will receive the signal, thereby sending a signal to the servo motor controlling the gear pump 1303 to adjust the speed, thereby adjusting the oil output of the gear pump 1303, thereby controlling the speed and pressure.

[0024] 2. Different samples require different clamping pressures. The plate-type relief valve ensures that the pressure in the high-pressure oil circuit does not exceed the standard and cause danger, and maintains the pressure value in the oil circuit. It can be adjusted according to the situation of sample 11 to adapt to a variety of different samples.

[0025] Specifically, the hydraulic station 7 includes an oil tank 1301, on which a gear pump 1303 is installed. An oil filter 1302 is installed at the inlet end of the gear pump 1303, and a one-way valve 1304 is installed at the outlet end of the gear pump 1303 to prevent the hydraulic oil from flowing back. The clamping cylinder 605 is controlled by an electromagnetic reversing valve 1307, and the one-way valve 1304 is connected to the clamping cylinder 605 through a high-pressure oil circuit. A pressure switch controller 1306 and a pressure gauge 1309 are installed on the high-pressure oil circuit, and a plate-type overflow valve 1305 is installed between the high-pressure oil circuit and the low-pressure oil circuit to control the pressure of the high-pressure oil circuit.

[0026] During the tensile test, it was found that the oil tank 1301 of the hydraulic station 7 had a serious temperature rise. Therefore, a cooling fan 1310 was installed on the return oil pipeline to speed up the heat dissipation of the return oil, and a temperature sensor 1311 was installed on the oil tank 1301 to monitor the oil temperature in real time. In order to reduce noise, the cooling fan 1310 used an oil-containing bearing silent cooling fan.

[0027] During the tensile test, it was found that when the sample 11 was stretched and broken, the equipment would generate a large vibration, which would affect precision measuring tools such as cameras. The equipment weighs about 5 tons and has a high center of gravity. It is ensured that the shock absorbing device will not cause the risk of the equipment tipping over. To solve this technical problem, in this embodiment, a shock absorbing device is installed at the lower end of the hydraulic tensile testing machine. The shock absorbing device includes a plurality of shock absorbers evenly distributed at the lower end of the hydraulic tensile testing machine. The shock absorber includes a base 1212. The base 1212 has bolt holes 1207 machined thereon, so that it can be stably connected to a foundation or platform. A support sleeve 1215 is sealed and installed at the upper end of the base 1212. An upward connecting column 1209 is installed in the support sleeve 1215, which is connected to the hydraulic tensile testing machine through the connecting column 1209. The hydraulic tensile testing machine is supported, a floating baffle ring 1204 is integrally formed on the connecting column 1209, a buffer spring 1205 is installed between the lower end of the floating baffle ring 1204 and the base 1212, an upper flange 1201 is installed on the upper end of the support sleeve 1215, the connecting column 1209 passes through the upper flange 1201 upward, the upper flange 1201 is threadedly connected to the support sleeve 1215, and is sealed by a sealing ring 1202, a force transmission spring 1203 is installed between the upper flange 1201 and the upper end of the floating baffle ring 1204, the force transmission spring 1203 and the buffer spring 1205 are both disc springs with a smaller stroke and a larger elastic force. During installation, the shock absorber is connected to the lower end of the hydraulic tensile testing machine, and then placed on the ground, and the hydraulic tensile testing machine is downward. Push the connecting column 1209 to move, thereby compressing the buffer spring 1205, tighten the upper flange 1201, and compress the force transmission spring 1203. After tightening the upper flange 1201, position it through the screws installed in the positioning hole 1210 to prevent loosening. During use, it was found that when the sample 11 was stretched and broken, the equipment would produce a large vibration. After multiple uses, the buffer spring 1205 was damaged, and the vibration amplitude was still large. A buffer cavity 1208 that matched the connecting column 1209 was processed on the base 1212, and the lower end of the connecting column 1209 was inserted into the buffer cavity 1208. The gap between the connecting column 1209 and the side wall of the buffer cavity 1208 was matched, and hydraulic oil was injected into the buffer cavity 1208. An oil storage cavity is formed between the connecting column 1209 and the buffer cavity 1208. To ensure the connection stability between the connecting column 1209 and the buffer cavity 1208, the side wall of the buffer cavity 1208 is in a boss shape. It is found during use that the buffer spring 1205 collides with the side wall of the buffer cavity 1208. Therefore, an oil storage ring 1211 is installed at the bottom of the support sleeve 1215. A plurality of oil storage grooves 1214 are processed on the oil storage ring 1211. The oil storage ring 1211 forms an isolation between the buffer cavity 1208 and the buffer spring 1205, and can also form an overflow groove 1213 between the buffer cavity 1208 to increase the pressure relief resistance. An oil filling hole 1206 is also processed on the side wall of the support sleeve 1215, and a plug is installed at the oil filling hole 1206. When the sample breaks and the equipment is subjected to a reaction force, it will be transmitted to the connecting column 1209 of the shock absorber.When the connecting column 1209 moves downward, the oil in the buffer chamber 1208 will overflow along the overflow groove 1213. Because the overflow groove 1213 is very narrow, it will play a damping role to consume the reaction force transmitted by the equipment, and work together with the disc spring to play a good shock absorption role. After the shock absorption, the equipment slowly recovers through the reaction force of the disc spring, and the oil also slowly falls into the buffer chamber 1208 along the overflow groove 1213, and the service life and stability of the tensile testing device are significantly increased.

[0028] The control module includes a central control panel 9 and a sample 11 transfer device. The central control panel 9 is arranged outside the fence 1 for easy operation. The sample transfer device transfers the sample 11 between the sample pretreatment module and the sample detection module. Specifically, the sample transfer device includes a mechanical arm 3, which is connected to a mechanical gripper 4. The mechanical gripper 4 includes a driving seat 401. The driving seat 401 is connected to two support seats 403 through a connecting seat 402. The driving seat 401 can drive the connecting seat 402 to move. A plurality of groups of gripping fingers are installed along a straight line between the two support seats 403. The plurality of groups of gripping fingers The fingers include a clamping finger 404 and an orthopedic clamping finger 405. The clamping finger 404 includes a side clamping plate installed at corresponding positions on the two support seats 403. A V-shaped opening is processed on the side clamping plate to cooperate with the sample. In order to adapt to samples with different outer diameters, the two side clamping plates can be installed in a staggered manner. The orthopedic clamping finger 405 includes a long strip fixed at corresponding positions on the two support seats 403. The cross section of the long strip is an arc. For a sample 11 that is not easy to bend, such as a threaded steel bar, it can be stably clamped by the clamping finger 404. After clamping, the end of the sample 11 The orthopedic clamping fingers 405 are two long strips with arc-shaped cross sections that cooperate with each other, thereby forming a clamping of a certain length of the steel strand, thereby achieving an orthopedic effect. During the test, it was found that by adjusting the position and number of the orthopedic clamping fingers 405, the steel strand can be quickly orthopedic. For example, the steel strand to be tested with an outer diameter of 10 mm and a length of 1000 mm is distributed at intervals in the middle position. A 60mm long orthopedic clamp finger 405 can straighten the steel strand, so that when the steel strand is clamped on the testing machine, a smaller stroke of the hydraulic tensile testing machine can make the steel strand reach the expected tensile stress, thereby conducting subsequent tests and improving work efficiency. The smaller the outer diameter and the longer the length of the steel strand, the easier it is to bend and deform. Accordingly, the number of orthopedic clamp fingers 405 needs to be increased. During the test, it was also found that when an orthopedic clamp finger 405 with a length of more than 25mm was installed at the end, the steel strand could be straightened to avoid tilting of the steel strand end.

[0029] A fixture rack 10 is also installed in the fence 1, and mechanical grippers 4 of different types are placed thereon for easy maintenance and replacement. There is also a waste box 5 in the fence 1, and the sample 11 after the test is completed is put into the waste box 5.

[0030] A multifunctional fully automatic tensile testing method comprises the following steps: The collected information of the sample 11 is input into the central console 9, and then the sample 11 is placed on the material rack and the corresponding coding area is input into the central console 9. The central console 9 controls the movement of the robot arm 3, and the sample 11 is taken out from the coding area and placed on the weighing and length measuring machine 8. The length and weight information are detected and input into the central console 9. The robot arm 3 takes the sample 11 out of the weighing and length measuring machine 8 and puts it into the hydraulic tensile testing machine. The jaws 604 are actuated to clamp the end of the sample 11 for a tensile test. The length and outer diameter change data of the sample 11, as well as the tensile force data are collected and input into the central console 9. After the tensile test is completed, the robot arm 3 takes out the sample 11 and puts it into the waste bin 5 to test the next sample 11.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional fully automatic tensile testing system, including a sample pretreatment module, a sample detection module and a control module, The sample preprocessing module includes a sample storage device; The sample detection module includes an appearance detection device, a weight detection device and a stretch detection device; The control module includes a central control console and a sample transport device, and the sample transport device transfers the sample between the sample pretreatment module and the sample detection module. It is characterized in that The sample transport device includes a mechanical arm, the mechanical arm is connected to a mechanical clamp, the mechanical clamp includes two support seats, and multiple groups of clamping fingers are arranged along a straight line between the two support seats. The shape detection device includes a length detection device, and the length detection device encodes the length information of the sample when detecting the length of the sample. The multiple groups of clamping fingers include clamping fingers and orthopedic clamping fingers. The clamping fingers include side clamping plates arranged at corresponding positions on two support seats. The orthopedic clamping fingers include long strips arranged at corresponding positions on two support seats. The cross-section of the long strips is arc-shaped.

2. The multifunctional fully automatic tensile testing system according to claim 1, characterized in that: The sample storage device comprises a material rack, on which a plurality of coding areas for storing samples are arranged.

3. The multifunctional fully automatic tensile testing system according to claim 1, characterized in that: The sample detection module includes a weighing and length measuring frame, the shape detection device and the weight detection device are arranged on the weighing and length measuring frame, and the weighing and length measuring frame is also provided with a sample adjustment device for correcting the position of the sample. The sample adjustment device includes a sample clamping jaw arranged on the weighing and length measuring frame, the sample clamping jaw cooperates with the end of the sample, the sample clamping jaw is connected to a rotation driving device, and the sample adjustment device also includes an angle detection device for detecting the angle state of the sample.

4. The multifunctional fully automatic tensile testing system according to claim 1, characterized in that: The stretching drive device of the stretching testing device includes an oil cylinder, a piston rod of the oil cylinder is connected to a jaw seat, a jaw slide is arranged on the jaw seat, a jaw piece is installed on the jaw slide, a positioning device is arranged between the jaw piece and the jaw slide, and a clamping oil cylinder for driving the jaw to move to clamp the sample is also installed on the jaw seat.

5. The multifunctional fully automatic tensile testing system according to claim 1, characterized in that: The clamping cylinder is driven by a hydraulic station, which includes an oil tank, a gear pump is installed on the oil tank, an oil filter is installed at the inlet end of the gear pump, a one-way valve is installed at the outlet end of the gear pump, and the clamping cylinder is controlled by an electromagnetic reversing valve.

6. The multifunctional fully automatic tensile testing system according to claim 1, characterized in that: The tensile testing device includes a hydraulic tensile testing machine, a shock absorbing device is installed at the lower end of the hydraulic tensile testing machine, the shock absorbing device includes a plurality of shock absorbers evenly distributed at the lower end of the hydraulic tensile testing machine, the shock absorber includes a base, a support sleeve is sealed and installed at the upper end of the base, an upward connecting column is installed in the support sleeve, and the support sleeve is connected to the hydraulic tensile testing machine through the connecting column, a floating baffle ring is integrally formed on the connecting column, a buffer spring is installed between the lower end of the floating baffle ring and the base, an upper flange is installed at the upper end of the support sleeve, the connecting column passes through the upper flange upward, the upper flange is threadedly connected to the support sleeve, and is sealed by a sealing ring, and a force transmission spring is installed between the upper flange and the upper end of the floating baffle ring.

7. The multifunctional fully automatic tensile testing system according to claim 6, characterized in that: A buffer cavity matched with the connecting column is processed on the base, and the lower end of the connecting column is inserted into the buffer cavity. The connecting column and the side wall of the buffer cavity are clearance-matched, and hydraulic oil is injected into the buffer cavity to form an oil storage cavity between the connecting column and the support sleeve. The side wall of the buffer cavity is boss-shaped, and an oil storage ring is installed at the bottom of the support sleeve. A plurality of oil storage grooves are processed on the oil storage ring. The oil storage ring forms an isolation between the buffer cavity and the buffer spring, and also forms an overflow groove between the oil storage ring and the buffer cavity. An oil filling hole is also processed on the side wall of the support sleeve, and a plug is installed at the oil filling hole.

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