Device and method for detecting compressive property of magnesium alloy part

Abstract

The invention discloses a magnesium alloy part compression resistance detection device and method, and relates to the technical field of part compression resistance testing, the magnesium alloy part compression resistance detection device comprises: a loading system, the loading system is composed of a main frame and a loading device, the main frame is a main body frame supporting the whole detection device; the pressure applying end is driven by the loading device to change the height of the pressure applying end, the loading device controls the downward pressure of the pressure applying end, the main frame platform is provided with a pressed end in a manner of centering the pressure applying end, and the pressure applying end and the pressed end are matched to carry out compression test on the part; the pressure detection matrix is used for detecting the change of the contact position of the pressed end and / or the pressure applying end and the part when the pressure applying end applies pressure to the part, and the pressure detection matrix is used for detecting the change of the contact position of the pressed end and / or the pressure applying end and the part when the pressure applying end applies pressure to the part. And determining different stages of deformation of the part according to the pressure change state.

Description

Technical Field

[0001] The invention relates to the technical field of component compression performance testing, and in particular to a device and method for testing the compression performance of a magnesium alloy component. Background Art

[0002] There are many kinds of magnesium alloy auto parts. Structural parts (seat frames and front-end frames), high-temperature resistant parts (cylinder blocks) and moving parts (wheels) all have the common feature of withstanding low mechanical and chemical loads. Magnesium alloys have high specific strength and good casting properties. Magnesium alloys have obvious advantages in thermal conductivity, vibration reduction and damping capacity. The compression performance test of magnesium alloy parts is particularly important. Most of the existing compression performance tests are carried out by compression performance testing machines.

[0003] Announcement No. CN217211958U discloses a device for testing the compressive performance of mechanical parts, including a bracket, a recording plate is provided on one side of the bracket, a threaded rod is installed on the top of the recording plate, and an assembly block is provided at the bottom of the threaded rod. This application is a variation of the existing hydraulic equipment, and the pressure plate is assembled and disassembled through the assembly structure to make up for the problem that the pressure plate of the hydraulic equipment is not easy to replace after damage. The compressive performance test of magnesium alloy parts achieved through this application is no different from that of ordinary hydraulic equipment; Announcement No. CN116558967A further discloses a beam reinforcement plate resistance strength detector for automobile parts processing. This application provides a beam reinforcement plate resistance strength detector for automobile parts processing that can simulate the compression performance test after the beam is installed on the car to improve the accuracy. It includes a frame, an electric slide rail and a strength detector. The left and right sides of the frame are connected to the electric slide rails. The strength detector is connected between the electric slide rails through sliders. It also includes a positioning mechanism and an insertion mechanism. A positioning mechanism is provided between the frame and the sliders of the electric slide rails, and an insertion mechanism is provided in the middle of the frame. The positioning frame pushes the beam to position and align, and the insertion rod is inserted into the hole of the beam to limit the beam, simulating the installation of the beam on the car. In this way, the compression performance test when the beam is installed on the car can be simulated to improve the accuracy.

[0004] The compressive strength tester proposed in the application simulates the installation environment of the automobile crossbeam and then applies pressure to the crossbeam to test the compressive performance of the automobile crossbeam.

[0005] Existing compression performance testing machines can evaluate the performance and durability of parts under different loads by applying gradually increasing pressure. They can only determine the compression performance under different loads, and cannot determine the compression change curve of complex parts. By simulating the installation and use environment of parts, they are only applicable to a single type of parts, and are extremely inconvenient for compressive performance testing of parts of multiple specifications and types. Summary of the Invention

[0006] One of the objectives of the present invention is to provide a device and method for detecting the compressive performance of magnesium alloy components, which can perform compressive tests on magnesium alloy components of multiple specifications and types, obtain the pressure change curve of the magnesium alloy components during the compressive process, and determine different deformation stages of the magnesium alloy components.

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A device for detecting the compressive performance of magnesium alloy components, comprising: a loading system, which consists of a main frame and a loading device. The main frame is the main framework for supporting the entire detection device. The main frame is placed on the ground and the main frame platform is parallel to the ground. The loading device is used to apply pressure to the components; It further includes: a pressure application end, the height of which is changed by the driving of the loading device. The loading device controls the downward pressure of the pressure application end. A pressure receiving end is arranged on the main frame platform to be centered with the pressure application end. The pressure application end and the pressure receiving end cooperate to perform a compressive test on the components; A pressure detection matrix is arranged on the surface of the pressure receiving end and / or the pressure application end in contact with the component to detect the change in the contact position between the pressure receiving end and / or the pressure application end and the component when the pressure application end applies pressure to the component. The pressure detection matrix obtains the pressure at the contact position of the component with the pressure receiving end and / or the contact position to determine the pressure change curve; A swing-adjustable positioning frame is arranged between the loading device and the main frame. The positioning frame is in a U-shaped setting, and the swing angle of the positioning frame can be adjusted manually. The positioning frame and the main frame are in a triangular position outside the pressure receiving end and the pressure application end; A clamping assembly is arranged inside the positioning frame and is connected to the positioning frame and the main frame through a connection assembly. The clamping assembly moves with the positioning frame. The clamping assembly has at least two force application directions after clamping the component, and the force application direction can be adjusted according to the change state of the pressure change curve; A control terminal is used to control the detection device, and can display the pressure change curve generated by the pressure detection matrix, and adjust the clamping state of the clamping assembly according to the pressure change curve.

[0008] In one or more embodiments of the present invention, the pressure detection matrix includes: Pressure sensors are installed inside the pressure receiving end and / or the pressure application end. The detection ends of the pressure sensors face the component to monitor the pressure distribution at different positions in real time; A data acquisition unit is arranged inside the pressure receiving end and / or the pressure application end. The data acquisition unit is connected to the pressure sensors and is arranged according to the positions of the pressure sensors. When the pressure changes at different positions, the position corresponding to the pressure change is determined; The processing unit obtains the pressure change at the contact position between the component and the pressure-receiving end and / or the pressure-applying end and draws a pressure change curve. The processing unit obtains the control instruction of the control terminal to the loading device and determines the applied pressure of the pressure-applying end.

[0009] In one or more embodiments of the present invention, both ends of the positioning frame are annularly arranged and connected to the loading device and the main frame through bearings. The connecting component connects at least one clamping component to the main frame, and the remaining clamping components are connected to the positioning frame through the connecting component. The positioning frame swings to adjust the clamping position of the clamping component on the component.

[0010] In one or more embodiments of the present invention, the clamping assembly includes: The clamping head is located at one end of the clamping assembly close to the component, and at least two pressing plates are configured inside the clamping head for fitting toward the component, and the number of the pressing plates is consistent with the number of directions in which the clamping assembly applies force to the component; An elastic body is arranged at one end of the pressing plate close to the component, and the elastic body contacts the component to avoid surface damage of the component during the clamping process; A control unit is configured inside the clamping head and connected to the pressure plate, and the control unit controls the movement of the pressure plate to contact the parts.

[0011] In one or more embodiments of the present invention, the control unit is hydraulically driven, and the state of the pressure plate is changed by the movement of the medium. The control unit includes: A control head is connected to the pressure plate, a driving pipeline is arranged at one end of the control head away from the pressure plate, and one end of the control head is inserted into the driving pipeline and driven by the driving pipeline; Hydraulic components, control the medium to enter the drive pipeline to drive the control head to move; One end of the drive pipeline connected to the control head is provided with a mounting sleeve, an electromagnetic ring is arranged inside the mounting sleeve, and a magnet is arranged at one end of the control head inserted into the mounting sleeve. The electromagnetic ring and the magnet cooperate to limit the position of the control head.

[0012] In one or more embodiments of the present invention, the control head includes: The connecting rod is inserted into the installation sleeve and contacts the installation sleeve. A sealing ring is provided on the outer side of the connecting rod. A ring groove for limiting the sealing ring is provided inside the installation sleeve. The telescopic range of the connecting rod is located between the ring grooves. A mounting head, threadedly mounted on the outside of the connecting rod, a swingable buckle is arranged on the outside of the mounting head, and the buckle is connected to the pressing plate; The gusset plate can be swingably mounted on the outside of the mounting head. The mounting head is provided with an electromagnetic block magnetically attracting the gusset plate. When the gusset plate is attached to the electromagnetic block, the swing of the buckle is limited; A card slot is arranged inside the buckle, and when the buckle plate is located inside the card slot, the swing position of the buckle is limited.

[0013] In one or more embodiments of the present invention, the interior of the elastic body is provided with a cavity, and the cavity is filled with gas to keep the pressure inside the cavity at a set value, an air pressure sensor is arranged at one end of the pressing plate away from the elastic body, the elastic body penetrates the pressing plate and extends to the side of the pressing plate where the air pressure sensor is installed, and the detection end of the air pressure sensor is connected to the cavity and detects the change of the gas pressure inside the cavity; The pressure plate clamps the component to compress the elastic body, changing the gas pressure inside the cavity. The air pressure sensor determines the effect of the pressure plate on the deformation of the component based on the change in gas pressure inside the cavity.

[0014] In one or more embodiments of the present invention, the connection assembly includes: The support rod is swingably mounted on the inner side of the positioning frame, and a segmented meshing block is arranged at the bottom of the positioning frame. Adjacent meshing blocks are connected by hand, and the connection position of the meshing blocks can be bent. A guide groove is arranged at one end of the meshing block that contacts the support rod, and a guide rail is arranged at a section of the support rod extending to the inside of the guide groove and is hinged to the guide rail; A tensioning structure passes through the meshing block and determines a bending state of the meshing block by tensioning the meshing block; The push rod is telescopically arranged between the clamping head and the positioning frame, and the two ends of the push rod are respectively hinged to the positioning frame and the clamping head.

[0015] In one or more embodiments of the present invention, the connection component further comprises: A micro telescopic rod is arranged inside the support rod and is used to control the swing angle of the support rod; The tensioning structure consists of a winding motor, a tensioning rope wound around the inner side of the winding wheel of the winding motor, and a positioning piece fixed to the outer side of the engagement block at the end. The winding motor controls the winding of the tensioning rope to change the state of the engagement block.

[0016] The embodiment of the present invention further provides a method for detecting compressive performance, which is used in the above-mentioned device for detecting compressive performance of magnesium alloy parts, and comprises the following steps: Determine the compressive performance test position of the parts and place the parts on the pressure-bearing end; The loading device drives the pressure end to move, exerting a certain pressure on the parts to ensure the stability of the parts; Adjust the position of the positioning frame so that it corresponds to the clamping point of the component; The clamping assembly is adjusted by the connecting assembly so that the clamping assembly is close to the component and the component is clamped in at least two force application directions; The pressure-applying end applies pressure continuously, determines the pressure change curve of the component through the pressure detection matrix, and adjusts the force direction of the clamping assembly according to the pressure state of the component; The pressure change curve is output to the control terminal for pressure resistance performance analysis.

[0017] Through the above technical solution, the present invention has the following beneficial effects: 1. The present invention performs a compression test on magnesium alloy parts. During the test, the contact position of the pressure-applying end and the pressure-receiving end of the magnesium alloy parts is obtained, and the different stages of deformation of the parts are determined according to the pressure change state. The clamping state of the magnesium alloy parts is adjusted according to the different stages of the magnesium alloy parts to ensure the stability of the parts.

[0018] 2. High-precision pressure sensors are installed at both the pressure-applying end and the pressure-receiving end to monitor the pressure changes at different positions of the pressure-applying end and the pressure-receiving end. The status of the components at the pressure-applying end and the pressure-receiving end is determined by the pressure position and changes. The pressure change curve presented by the components during the pressure resistance process can accurately reflect the different deformation states of the components during the pressure resistance process.

[0019] 3. During the extrusion of magnesium alloy parts, the position change of the magnesium alloy parts after deformation can be determined according to the change of the pressure detection position at the pressure end, and the deformation amplitude of the parts can be determined. Since the deformation of the parts occurs at different stages after being pressed, the change state of the parts is monitored at all times according to the change of the contact position between the parts and the pressure end.

[0020] 4. In order to avoid the problem that the deformation data of the parts will be affected by clamping the parts during the deformation process, resulting in inaccurate compressive performance data of the parts, the parts are contacted by elastic parts. When the deformation of the parts affects the pressure inside the elastic parts, the force direction for clamping the parts is adjusted to ensure the stability of the parts without affecting the deformation data of the parts.

[0021] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A perspective view of the present invention; Figure 2 It is a partial schematic diagram of the present invention; Figure 3 It is a schematic diagram of the installation position of the positioning frame of the present invention; Figure 4 It is a schematic diagram of the structure of the positioning frame connecting the pressure-applying end and the pressure-receiving end of the present invention; Figure 5 It is a schematic diagram of the internal structure of the pressure-bearing end of the present invention; Figure 6 It is a schematic diagram of the connection structure of a single positioning frame of the present invention; Figure 7It is a schematic diagram of the structure of the connecting assembly and the clamping assembly of the present invention; Figure 8 It is a schematic diagram of the combined bending structure of the meshing blocks of the present invention; Fig. 9 It is a split diagram of the meshing block of the present invention; Fig.10 It is a schematic diagram of the connection structure between the engagement block and the clamping assembly of the present invention; Fig.11 It is a cross-sectional view of the internal structure of the clamping head of the present invention; Fig.12 It is a schematic diagram of the internal structure of the clamping head of the present invention; Fig.13 It is a schematic diagram of the pressing plate installation structure of the present invention; Fig.14 It is a cross-sectional view of the pressing plate installation structure of the present invention; Fig.15 It is a plan view of the pressure plate installation structure of the present invention.

[0023] In the figure: 1 main frame, 2 loading device, 3 pressure end, 4 pressure end, 5 pressure detection matrix, 6 positioning frame, 7 connection assembly, 8 clamping assembly, 9 control terminal; 51 pressure sensor, 52 processing unit; 71 support rod, 72 engagement block, 73 guide groove, 74 guide rail, 75 push rod, 76 micro telescopic rod, 77 tensioning structure: 771 winding motor, 772 tensioning rope, 773 positioning sheet; 81 clamping head, 82 pressure plate, 83 elastomer, 84 control unit: 841 control head: 411 connecting rod, 412 sealing ring, 413 ring groove, 414 mounting head, 415 buckle, 416 buckle plate, 417 electromagnetic block, 418 slot; 842 drive pipeline, 843 hydraulic assembly, 844 mounting sleeve, 845 electromagnetic ring, 846 magnet; 85 air pressure sensor. DETAILED DESCRIPTION

[0024] The following will disclose multiple embodiments of the present invention with the accompanying drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. And if it is possible to implement, the features of different embodiments can be applied interchangeably.

[0025] Unless otherwise defined, all words (including technical and scientific terms) used herein have their usual meanings, which can be understood by those familiar with this field. Furthermore, the definitions of the above words in commonly used dictionaries should be interpreted in the content of this specification as consistent with the meanings of the relevant fields of the present invention. Unless otherwise clearly defined, these words will not be interpreted as idealized or overly formal meanings.

[0026] The relationships and terms used in the present invention are explained below: Parallelism: The parallelism defined in the present invention is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, which allows for non-absolute parallelism due to factors such as assembly tolerance, design tolerance, and influence of structural flatness. Small angular errors are allowed. For example, an assembly error range of less than 10 degrees can be understood as a parallel relationship.

[0027] Vertical: The verticality defined in the present invention is not limited to an absolute vertical intersection (angle of 90 degrees). It allows for non-absolute vertical intersections caused by factors such as assembly tolerance, design tolerance, and influence of structural flatness. It also allows for errors in a small angle range. For example, the assembly error range of 80 to 100 degrees can be understood as a vertical relationship.

[0028] Ground: The ground defined in the present invention is not limited to a certain material or region, but only a platform for carrying the present invention, and stacking, tilting, and flatness changes are allowed. For example, cement ground, tile ground, work platform, etc. can all be interpreted as ground.

[0029] The above explanation does not completely include the relationship definitions given in the present invention, but only represents a part of the present invention.

[0030] The present invention provides a device for detecting the compressive performance of a magnesium alloy component, which is used for performing a compressive test on a magnesium alloy component, obtaining a pressure variation curve of the component, and determining the compressive state of the component at different stages.

[0031] See also Figure 1-2 In one embodiment, the compressive performance testing device includes: a loading system, which is composed of a main frame 1 and a loading device 2. The main frame 1 is a main frame supporting the entire testing device. The main frame 1 is placed on the ground and the platform of the main frame 1 is parallel to the ground. The loading device 2 is used to apply pressure to the parts; illustratively, the loading device 2 includes a hydraulic cylinder, a screw rod, a servo motor, etc.; It also includes: a pressure end 3, which is driven by a loading device 2 to change the height of the pressure end 3, the loading device 2 controls the downward pressure of the pressure end 3, and the main frame 1 platform is centered on the pressure end 3 to set a pressure receiving end 4, and the pressure end 3 and the pressure receiving end 4 cooperate to perform a pressure test on the components; A pressure detection matrix 5 is disposed on the surface of the pressure-receiving end 4 and / or the pressure-applying end 3 in contact with the component, and detects the change in the contact position between the pressure-receiving end 4 and / or the pressure-applying end 3 and the component when the pressure-applying end 3 applies pressure to the component. The pressure detection matrix 5 obtains the pressure change curve by determining the pressure at the position where the component contacts the pressure-receiving end 4 and / or the contact position. Refer to Figure 2-4 , A swing-adjustable positioning frame 6 is provided between the loading device 2 and the main frame 1. The positioning frame 6 is in a U-shaped configuration and can be manually adjusted in terms of the swing angle. The positioning frame 6 is located at the triangular position outside the pressure-receiving end 4 and the pressure-applying end 3 of the main frame 1. A clamping assembly 8 is disposed inside the positioning frame 6 and is connected to the positioning frame 6 and the main frame 1 through a connection assembly 7. The clamping assembly 8 moves along with the positioning frame 6. The clamping assembly 8 has at least two force application directions after clamping the component, and the force application direction can be adjusted according to the change state of the pressure change curve. A control terminal 9 is used to control the detection device, and can display the pressure change curve generated by the pressure detection matrix 5, and adjust the clamping state of the clamping assembly 8 according to the pressure change curve.

[0032] In an implementable manner, the pressure-receiving end 4 is detachably installed on the inner platform of the main frame 1. When the component is subjected to a compressive performance test, it is placed on the pressure-receiving end 4, and the loading device 2 drives the pressure-applying end 3 to move downward to contact the component and apply pressure to the component.

[0033] During the process of the component being compressed, the pressure detection matrix 5 is used to determine the pressure change feedback from the component to the pressure-receiving end 4, and the pressure change curve during the compressive process of the component is determined according to the pressure change. The pressure change curve reflects the pressure change of the component from bending to fracture.

[0034] Among them, the clamping assembly 8 forms a clamping of the component to ensure the stability of the component. When the clamping assembly 8 clamps the component, at least two force application directions for the component are set. After the component is compressed and deformed, the switching of the force application direction can avoid affecting the deformation of the component and ensure the accuracy of the compressive performance detection of the component.

[0035] Refer to Figure 4-5 , In one embodiment, the pressure detection matrix 5 includes: Pressure sensors 51 are installed inside the pressure-receiving end 4 and / or the pressure-applying end 3. The detection ends of the pressure sensors 51 face the component, and the pressure distribution at different positions is monitored in real time. A data acquisition unit is disposed inside the pressure receiving end 4 and / or the pressure applying end 3. The data acquisition unit is connected to the pressure sensor 51 and arranged according to the position of the pressure sensor 51. When the pressure at different positions changes, the position corresponding to the pressure change is determined; The processing unit 52 obtains the pressure change at the contact position between the component and the pressure-receiving end 4 and / or the pressure-applying end 3 and draws a pressure change curve. The processing unit 52 obtains the control instruction of the control terminal 9 to the loading device 2 and determines the applied pressure of the pressure-applying end 3.

[0036] In one feasible method, based on the existing testing machine, the pressure-applying end 3 and the pressure-receiving end 4 are improved so that they can better feedback the pressure changes of the components during the compression process. According to the compression pressure change curve of the components, the deformation of the components can be reflected in more detail, and more complete compression data of the components can be obtained.

[0037] The processing unit 52 combines with the control terminal 9 to issue control instructions to the loading device 2, obtains the pressure applied by the pressure-applying end 3 to the component, and combines with the pressure change curve of the component to output pressure change data in more detail, so as to analyze the pressure resistance of the component according to the applied pressure and the pressure change curve.

[0038] See also Figure 4 as well as Figure 6 In one embodiment, both ends of the positioning frame 6 are annularly arranged and connected to the loading device 2 and the main frame 1 through bearings. The connecting component 7 connects at least one clamping component 8 to the main frame 1, and the remaining clamping components 8 are connected to the positioning frame 6 through the connecting component 7. The positioning frame 6 swings to adjust the clamping position of the clamping component 8 on the parts.

[0039] In one feasible method, two positioning frames 6 are provided, and the two positioning frames 6 drive the two clamping assemblies 8 to change their positions. The clamping assembly 8 connected to the main frame 1 is restricted, and clamps the parts together with the other two clamping assemblies 8 to form three clamping points, thereby ensuring the stability of the clamping assembly 8.

[0040] Among them, the clamping components 8 are all individually controlled by the connecting components 7. The clamping components 8 play a stabilizing role for the parts. When the pressure-applying end 3 moves toward the pressure-receiving end 4, the parts are prevented from being separated from the detection device. After the pressure-applying end 3 contacts the parts, a fixed pressure is applied to ensure the stability of the parts, and then the clamping components 8 are used to clamp the parts.

[0041] Due to the fixed pressure applied by the pressure end 3, the order in which the clamping assembly 8 contacts and applies pressure to the parts does not change the position of the parts, further ensuring the stability of the parts. Clamping the clamping assembly 8 at multiple points also ensures the stability of the parts during the extrusion process.

[0042] See also Figure 11-12 In one embodiment, the clamping assembly 8 comprises: The clamping head 81 is located at one end of the clamping assembly close to the component. The clamping head 81 is internally provided with at least two pressing plates 82 for contacting the component. The number of the pressing plates 82 is consistent with the number of directions in which the clamping assembly 8 applies force to the component. An elastic body 83 is disposed at one end of the pressing plate 82 close to the component, and the elastic body 83 contacts the component to avoid surface damage to the component during the clamping process; The control unit 84 is disposed inside the clamping head 81 and connected to the pressing plate 82 . The control unit 84 controls the pressing plate 82 to move and contact the parts.

[0043] In one feasible method, multiple pressure plates 82 are provided, and the force direction corresponding to each pressure plate 82 is inconsistent. In the process of stably clamping parts, the force direction of the pressure plate 82 is changed to avoid affecting the deformation of the parts during the clamping process. Since most parts have complex structures, in order to prevent the pressure plate 82 from scratching the surface of the parts during the clamping process, an elastic body 83 is provided on the outside of the pressure plate 82 to protect the parts.

[0044] See also Fig.12 In one embodiment, the control unit 84 is hydraulically driven and changes the state of the pressure plate 82 through the movement of the medium. The control unit 84 includes: The control head 841 is connected to the pressure plate 82. The end of the control head 841 away from the pressure plate 82 is provided with a driving pipeline 842. One end of the control head 841 is inserted into the driving pipeline 842 and driven by the driving pipeline 842. The hydraulic assembly 843 controls the medium to enter the driving pipeline 842 to drive the control head 841 to move; One end of the driving pipeline 842 connected to the control head 841 is provided with a mounting sleeve 844, an electromagnetic ring 845 is arranged inside the mounting sleeve 844, and a magnet 846 is arranged at one end of the control head 841 inserted into the mounting sleeve 844. The electromagnetic ring 845 and the magnet 846 cooperate to limit the position of the control head 841.

[0045] In one practicable manner, the pressure change of the medium is used to drive the control head 841 to extend and retract, so that the control head 841 can change the position of the pressure plate 82, and the state change of the pressure plate 82 enables it to fit the outer wall of the component.

[0046] Optionally, the hydraulic assembly 843 is a combination of a hydraulic pump and a hydraulic box. The hydraulic pump mobilizes the medium in the hydraulic box to move, so that the medium enters the drive pipeline 842 from the hydraulic box or enters the inside of the hydraulic box from the drive pipeline 842, thereby driving the control head 841 to move.

[0047] Alternatively, the hydraulic assembly 843 is a combination of a telescopic rod and a hydraulic box, and the telescopic rod expands or contracts the volume of the hydraulic box to change the position of the medium.

[0048] See also Figure 13-15 In one embodiment, the control head 841 includes: The connecting rod 411 is inserted into the installation sleeve 844 and contacts the installation sleeve 844. The outer side of the connecting rod 411 is sleeved on the sealing ring 412. The installation sleeve 844 is provided with a corresponding annular groove 413 for limiting the sealing ring 412. The telescopic range of the connecting rod 411 is located between the annular grooves 413. A mounting head 414 is threadedly mounted on the outside of the connecting rod 411 , and a swingable buckle 415 is disposed on the outside of the mounting head 414 , and the buckle 415 is connected to the pressing plate 82 ; The buckle plate 416 can be swingably mounted on the outside of the mounting head 414. An electromagnetic block 417 is disposed inside the mounting head 414 to magnetically attract the buckle plate 416. When the buckle plate 416 is attached to the electromagnetic block 417, the buckle 415 is restricted from swinging. A slot 418 is disposed inside the buckle 415 , and the buckle plate 416 limits the swinging position of the buckle 415 when it is located inside the slot 418 .

[0049] In one feasible method, the buckle plate 416 is used to limit the swing state of the buckle 415 so that the pressure plate 82 can fit different angles. Under the connection of the control head 841, the pressure plate 82 can present multiple angle changes. When the buckle plate 416 limits the buckle 415 to prevent the buckle 415 from swinging, the axis of the connecting rod 411 is perpendicular to the pressure plate 82. When the buckle plate 416 on one side is detached from the buckle 415, the buckle 415 can swing in that direction.

[0050] In addition, after the electromagnet 846 is released from the magnetic attraction of the pinch plate 416 , in order to make the pinch plate 416 quickly release from the slot 418 , a spring supporting the pinch plate 416 is arranged between the pinch plate 416 and the mounting head 414 , and the spring supports the pinch plate 416 to release from the slot 418 .

[0051] See also Fig.13 In one embodiment, the elastic body 83 is provided with a cavity inside, and the cavity is filled with gas to keep the pressure inside the cavity at a set value. An air pressure sensor 85 is arranged at one end of the pressing plate 82 away from the elastic body 83. The elastic body 83 penetrates the pressing plate 82 and extends to the side of the pressing plate 82 where the air pressure sensor 85 is installed. The detection end of the air pressure sensor 85 is connected with the cavity and detects the change of the gas pressure inside the cavity. The pressure plate 82 clamps the component to compress the elastic body 83, thereby changing the gas pressure inside the cavity. The air pressure sensor 85 determines the influence of the pressure plate 82 on the deformation of the component based on the change in the gas pressure inside the cavity.

[0052] In one feasible manner, the pressure plate 82 clamps the component to limit the position of the component, and the component is deformed under the extrusion of the pressure-applying end 3. The deformation of the component directly corresponds to the compressive resistance of the component. In order to avoid the pressure plate 82 limiting the position of the component and affecting the deformation of the component, when the component changes its state and affects the pressure of the internal cavity of the elastomer 83, the elastomer 83 is squeezed in the deformed state of the component to determine the pressure plate 82 that affects the deformation of the component.

[0053] The force direction of the pressing plate 82 clamping the component is adjusted according to the pressing plate 82 that affects the deformation of the component.

[0054] See also Figure 7-10 In one embodiment, the connection component 7 comprises: The support rod 71 is swingably mounted on the inner side of the positioning frame 6. The bottom of the positioning frame 6 is provided with segmented engagement blocks 72. Adjacent engagement blocks 72 are connected end to end, and the connection position of the engagement blocks 72 can be bent. A guide groove 73 is provided at one end of the engagement block 72 that contacts the support rod 71. A guide rail 74 is arranged at a section of the support rod 71 extending to the inside of the guide groove 73 and is hinged to the guide rail 74. A tensioning structure 77, which passes through the engagement block 72 and determines the bending state of the engagement block 72 by tensioning the engagement block 72; The push rod 75 is telescopically disposed between the clamping head 81 and the positioning frame 6 , and two ends of the push rod 75 are respectively hinged to the positioning frame 6 and the clamping head 81 .

[0055] In one practicable manner, a segmented meshing block 72 is used, and when the tensioning force is changed, a pulling force is formed on the meshing block 72, so that the meshing block 72 can change its state, and under the restriction of the support rod 71, a part of the meshing block 72 is guaranteed to be stable, and the other part is adjusted according to the state of the tensioning structure 77, so that the position of the clamping head 81 can be changed, so that it can be adjusted accordingly according to the structure of the parts. One end of the meshing block 72 is connected to the clamping head 81 and the clamping head 81 can swing relative to the meshing block 72.

[0056] See also Figure 6-7 as well as Fig. 9 In one embodiment, the connection component 7 further comprises: A micro telescopic rod 76 is disposed inside the support rod 71 and is used to control the swing angle of the support rod 71; The tensioning structure 77 consists of a winding motor 771, a tensioning rope 772 wound around the inner side of the winding wheel of the winding motor 771, and a positioning piece 773 fixed to the outer side of the engagement block 72 at the end. The winding motor 771 controls the winding of the tensioning rope 772 to change the state of the engagement block 72.

[0057] In one feasible method, the support rod 71 is controlled by a micro telescopic rod 76 to ensure the stability of the support rod 71, and the stability of the support rod 71 is used to ensure the stability of the engaging block 72. The change of the tensioning state is adjusted by the tensioning structure 77, and the stable support of the clamping head 81 is guaranteed according to the tensioning state.

[0058] The embodiment of the present invention further provides a method for detecting compressive performance, which is used in the above-mentioned device for detecting compressive performance of magnesium alloy parts, and comprises the following steps: Determine the compressive performance test position of the component and place the component on the pressure-bearing end 4; The loading device 2 drives the pressure end 3 to move, exerting a certain pressure on the component to ensure the stability of the component; Adjust the position of the positioning frame 6 so that the positioning frame 6 corresponds to the clamping point of the component; Adjust the clamping assembly 8 through the connecting assembly 7 so that the clamping assembly 8 is close to the component and clamps the component in at least two force application directions; The pressure-applying end 3 applies pressure continuously, determines the pressure change curve of the component through the pressure detection matrix 5, and adjusts the force direction of the clamping assembly 8 according to the pressure state of the component; The pressure variation curve is output to the control terminal 9 for pressure resistance performance analysis.

[0059] Although the present invention is disclosed in conjunction with the above embodiments, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the attached claims.

Claims

1. A device for testing the compressive performance of magnesium alloy parts, characterized in that: Including: A loading system, which consists of a main frame and a loading device. The main frame is the main framework that supports the entire detection device. The main frame is placed on the ground and the main frame platform is parallel to the ground. The loading device is used to apply pressure to the components; It also includes: a pressure application end. The height of the pressure application end is changed by the driving of the loading device. The loading device controls the downward pressure of the pressure application end. A pressure receiving end is arranged on the main frame platform to be centered with the pressure application end. The pressure application end and the pressure receiving end cooperate to conduct a compressive test on the components; A pressure detection matrix is arranged on the surface of the pressure receiving end and / or the pressure application end in contact with the components to detect the change in the contact position between the pressure receiving end and / or the pressure application end and the components when the pressure application end applies pressure to the components. The pressure detection matrix obtains the pressure at the contact position of the components with the pressure receiving end and / or the contact position to determine the pressure change curve; A swing-adjustable positioning frame is arranged between the loading device and the main frame. The positioning frame is in a U-shaped setting and can be manually adjusted in terms of the swing angle. The positioning frame and the main frame are in a triangular position outside the pressure receiving end and the pressure application end; A clamping assembly is arranged inside the positioning frame and is connected to the positioning frame and the main frame through a connection assembly. The clamping assembly moves along with the positioning frame. The clamping assembly has at least two force application directions after clamping the components, and the force application direction can be adjusted according to the change state of the pressure change curve; A control terminal is used to control the detection device, can display the pressure change curve generated by the pressure detection matrix, and adjust the clamping state of the clamping assembly according to the pressure change curve; 2. A device for detecting the compressive properties of magnesium alloy parts according to claim 1, characterized in that: The pressure detection matrix includes: Pressure sensors are installed inside the pressure receiving end and / or the pressure application end. The detection ends of the pressure sensors face the components to monitor the pressure distribution at different positions in real time; A data acquisition unit is arranged inside the pressure receiving end and / or the pressure application end. The data acquisition unit is connected to the pressure sensors and is arranged according to the positions of the pressure sensors. When the pressure changes at different positions, it determines the positions corresponding to the pressure changes; A processing unit obtains the pressure changes at the contact positions of the components with the pressure receiving end and / or the pressure application end and draws the pressure change curve. The processing unit obtains the control instructions of the control terminal for the loading device to determine the applied pressure of the pressure application end; 3. A magnesium alloy component compression performance testing device according to claim 2, characterized in that: Both ends of the positioning frame are in a ring-shaped setting and are connected to the clamping device and the main frame through bearings. The connection assembly connects at least one clamping assembly to the main frame, and the remaining clamping assemblies are connected to the positioning frame through the connection assembly. The positioning frame swings to adjust the clamping position of the clamping assembly for the components; 4. A device for detecting the compressive properties of magnesium alloy parts according to claim 3, characterized in that: The clamping assembly includes: A clamping head is located at one end of the clamping assembly close to the components. At least two pressing plates for fitting towards the components are configured inside the clamping head. The number of pressing plates is the same as the number of force application directions of the clamping assembly for the components; An elastic body is arranged at one end of the pressing plate close to the components. The elastic body contacts the components to avoid surface damage of the components during the clamping process; A control unit is configured inside the clamping head and is connected to the pressing plates. The control unit controls the movement of the pressing plates to contact the components; 5. A device for detecting the compressive properties of magnesium alloy parts according to claim 4, characterized in that: The control unit is hydraulically driven and changes the state of the pressing plates through the movement of the medium. The control unit includes: A control head is connected to the pressing plates. A driving pipeline is arranged at the end of the control head facing away from the pressing plates. One end of the control head is inserted into the driving pipeline and is driven by the driving pipeline; Hydraulic components, control the medium to enter the drive pipeline to drive the control head to move; One end of the drive pipeline connected to the control head is provided with a mounting sleeve, an electromagnetic ring is arranged inside the mounting sleeve, and a magnet is arranged at one end of the control head inserted into the mounting sleeve. The electromagnetic ring and the magnet cooperate to limit the position of the control head.

6. A device for detecting the compressive properties of magnesium alloy parts according to claim 5, characterized in that: The control head includes: The connecting rod is inserted into the installation sleeve and contacts the installation sleeve. The outer side of the connecting rod is sleeved on the sealing ring. The inner side of the installation sleeve is correspondingly provided with an annular groove for limiting the sealing ring. The telescopic range of the connecting rod is located between the annular grooves. A mounting head, threadedly mounted on the outside of the connecting rod, a swingable buckle is arranged on the outside of the mounting head, and the buckle is connected to the pressing plate; The gusset plate can be swingably mounted on the outside of the mounting head. The mounting head is provided with an electromagnetic block magnetically attracting the gusset plate. When the gusset plate is attached to the electromagnetic block, the swing of the buckle is limited. A card slot is arranged inside the buckle, and when the buckle plate is located inside the card slot, the swing position of the buckle is limited.

7. A device for detecting the compressive properties of magnesium alloy parts according to claim 6, characterized in that: The elastic body has a cavity inside, and the cavity is filled with gas to keep the pressure inside the cavity at a set value. An air pressure sensor is arranged at one end of the pressing plate away from the elastic body. The elastic body penetrates the pressing plate and extends to the side of the pressing plate where the air pressure sensor is installed. The detection end of the air pressure sensor is connected to the cavity and detects the change of the gas pressure inside the cavity. The pressure plate clamps the component to compress the elastic body, changing the gas pressure inside the cavity. The air pressure sensor determines the effect of the pressure plate on the deformation of the component based on the change in gas pressure inside the cavity.

8. The device for detecting the compressive properties of magnesium alloy parts according to claim 7, characterized in that: The connection components include: The support rod is swingably mounted on the inner side of the positioning frame, and a segmented meshing block is arranged at the bottom of the positioning frame. Adjacent meshing blocks are connected by hand, and the connection position of the meshing blocks can be bent. A guide groove is arranged at one end of the meshing block that contacts the support rod, and a guide rail is arranged at a section of the support rod extending to the inside of the guide groove and is hinged to the guide rail; A tensioning structure passes through the meshing block and determines a bending state of the meshing block by tensioning the meshing block; The push rod is telescopically arranged between the clamping head and the positioning frame, and the two ends of the push rod are respectively hinged to the positioning frame and the clamping head.

9. A device for detecting the compressive properties of magnesium alloy parts according to claim 8, characterized in that: The connection components also include: A micro telescopic rod is arranged inside the support rod and is used to control the swing angle of the support rod; The tensioning structure consists of a winding motor, a tensioning rope wound around the inner side of the winding wheel of the winding motor, and a positioning piece fixed to the outer side of the engagement block at the end. The winding motor controls the winding of the tensioning rope to change the state of the engagement block.

10. A method for testing compressive performance, used in the device for testing compressive performance of magnesium alloy parts according to any one of claims 1 to 9, characterized in that: The following steps are involved: Determine the compressive performance test position of the parts and place the parts on the pressure-bearing end; The loading device drives the pressure end to move, exerting a certain pressure on the parts to ensure the stability of the parts; Adjust the position of the positioning frame so that it corresponds to the clamping point of the component; The clamping assembly is adjusted by the connecting assembly so that the clamping assembly is close to the component and the component is clamped in at least two force application directions; The pressure-applying end applies pressure continuously, drives the pressure change curve of the component through the pressure detection matrix, and adjusts the force direction of the clamping assembly according to the pressure state of the component; The pressure change curve is output to the control terminal for pressure resistance performance analysis.

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