CN116773352A - Pressure testing equipment and pressure testing method - Google Patents

Abstract

The application provides a pressure testing device and a testing method, wherein the pressure testing device comprises the following steps: the base is used for providing support and realizing the placement of a test piece; the frame is arranged on the base; the cross bar performs lifting movement on the frame; the detection device is arranged on the cross rod and is used for detecting the strength of the test piece; the lifting device is arranged on the frame and connected with the cross rod, and the lifting device drives the cross rod to do lifting motion; the detection device comprises a driving mechanism, a tension pressure sensor and a horizontal pressing block; the lifting device comprises a gear motor, a transmission shaft, a screw rod, a transmission gear set and a guide rod. According to the application, the height of the detection device can be stably regulated through the lifting device according to the height of the detection test piece, so that the accuracy of the pressure test detection of the detection device on the test piece is ensured.

Description

Pressure testing equipment and pressure testing method

Technical field

This application relates to the technical field of furniture mechanical performance testing, and in particular to a pressure testing equipment and pressure testing method.

Background technique

Mechanical properties refer to the mechanical characteristics of furniture materials when they are subjected to various external loads in different environments, such as compression, continuous loading, bending, torsion, durability, impact, etc. If the mechanical properties are not up to standard, it will affect the service life of the furniture. and safety of use.

The strength and mechanical properties of furniture refer to the ability of the furniture to avoid impermissible damage under the action of load. This is an important mechanical performance index of furniture. The load is expressed in two forms: static load and dynamic load. Static load strength represents The maximum load-bearing capacity of furniture reflects the safe use range of the furniture. In addition, furniture is often subject to dynamic loads during use, such as chair surfaces and tabletops being violently sat down by the human body or being hit by heavy objects. In order to ensure Furniture has good strength and mechanical properties and needs to be tested accordingly.

How to conduct more comprehensive and efficient strength testing experiments on furniture specimens such as table boards, cabinet doors and other panel furniture structures, and improve the accuracy and objectivity of experimental data. The current testing and testing machines still have shortcomings in certain applications. .

Contents of the invention

In order to solve the problems existing in the prior art, this application provides a pressure testing device and a pressure testing method.

In a first aspect, embodiments of the present application provide a pressure testing device, including:

A base, which is used to provide support and achieve placement of the test piece;

A frame, the frame is arranged on the base;

Cross bar, the cross bar moves up and down on the frame;

A detection device, the detection device is arranged on the crossbar, and the detection device is used to detect the strength of the test piece;

And a lifting device, the lifting device is arranged on the frame, the lifting device is connected to the cross bar, and the lifting device drives the cross bar to perform lifting motion;

The detection device includes:

Driving mechanism, the driving mechanism is arranged vertically on the cross bar, and the driving mechanism is a cylinder;

A pulling pressure sensor, which is arranged at the bottom of the driving mechanism, and the driving mechanism drives the pulling pressure sensor to perform lifting movements;

A horizontal pressure block, which is arranged at the bottom of the tensile pressure sensor, and is used to contact the test piece;

The lifting device includes:

a reduction motor, which is arranged on the top of the frame;

A transmission shaft, the transmission shaft is horizontally arranged on the top of the frame, the transmission shaft is rotationally connected to the top of the frame, and the reduction motor drives the transmission shaft to rotate;

The number of the screw rods is two. The two screw rods are vertically arranged on both sides of the length of the frame. The screw rods are rotationally connected to the frame. The screw rods are threadedly connected to the ends of the cross bars. ;

A transmission gear set, which is arranged at the end of the transmission shaft and the screw rod, and is used for transmission between the transmission shaft and the screw rod;

Guide rods, the number of the guide rods is two, the guide rods are vertically arranged at both ends of the length of the frame, the guide rods pass through the ends of the cross bars and are slidably matched with the cross bars.

Further, a fixed plate is provided at the bottom of the cylinder, and a sleeve is provided and fixed on the fixed plate. A lifting plate is connected to the piston rod of the cylinder, and the tension and pressure sensor is fixed on the bottom of the lifting plate. , the lifting plate is provided with a vertical guide rod, which passes through the sleeve and is slidably matched with the sleeve.

Further, a clamping block is fixed on the top of the lifting plate, a T-shaped cavity is formed on the clamping block, and a connector matching the T-shaped cavity is fixed on the end of the piston rod of the cylinder, so The connector can slide from one end of the clamping block into the T-shaped cavity.

Further, a positioning device with adjustable size is provided on the base, and the positioning device is used to position the test piece.

Further, the positioning device includes a transverse adjustment component and a longitudinal adjustment component;

The lateral adjustment assembly includes:

First positioning plates, the number of the first positioning plates is two, and the first positioning plates are arranged along the length direction of the base;

A first two-way screw, the first two-way screw is rotatably installed in the base, the two first positioning plates are threadedly matched with the first two-way screw, and the first positioning plates are slidably installed on the base; rotating The first two-way screw rod and the two first positioning plates move toward or away from each other;

The first motor is arranged on the base, and the first motor is connected to the first bidirectional screw rod.

The longitudinal adjustment component includes:

second positioning plates, the number of the second positioning plates is four, and two second positioning plates are slidably provided on each first positioning plate;

a second two-way screw rod, the second two-way screw rod is rotatably arranged on the opposite side of the two first positioning plates, and two second positioning plates are threadedly connected to each of the second two-way screw rods; turn the said a second two-way screw rod, the two second positioning plates move toward or away from each other;

The second motor is arranged on the second positioning plate, and the second motor is connected to the second bidirectional screw rod.

Further, the base is provided with a mobile platform that slides along the length direction of the base. The positioning device is provided on the mobile platform. The base is provided with a driving device. The driving device drives the mobile platform to reciprocate on the base. Move the test piece directly below the detection device.

Further, the driving device includes a driving screw, a nut and a servo motor. The mobile platform is slidably installed on the base. The driving screw is rotationally installed on the base. The nut is threaded with the driving screw, so The nut is fixed to the moving platform, the servo motor is arranged on the base, and the servo motor is connected to a driving screw rod.

Further, protective covers are provided on both sides of the frame, and the protective covers are used to protect the transmission gear set and the screw rod.

In a second aspect, embodiments of the present application provide a pressure testing method based on any one of the above pressure testing devices, including the following steps:

S1. According to the height of the test piece to be tested, adjust the height of the detection device through the lifting device;

S2. Move the test piece to be tested to the base, and place the test piece to be tested directly under the detection device;

S3. The computer control system sets the force value, and the detection device performs a pressure test on the specimen;

S4. When the damage to the specimen reaches the set level of damage or the test reaches the specified number of tests, the device automatically stops, and the computer control system performs statistical processing of the data and outputs the results;

Further, the step S2 includes:

S21. The driving device drives the mobile platform to move to the end of the base, and places the specimen on the mobile platform;

S22. The transverse adjustment component in the positioning device positions the test piece laterally, and the longitudinal adjustment component positions the test piece longitudinally so that the test piece is centered on the mobile platform;

S23. The driving device moves the mobile platform directly below the detection device.

Compared with the existing technology, this application has the following beneficial effects:

The present invention can stably adjust the height of the detection device through the lifting device according to the height of the detection test piece, ensuring the accuracy of the detection device's pressure test on the test piece. This device can perform pressure testing on test pieces of different heights within a certain range. Test detection improves the applicability of the pressure detection device.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the present application;

Figure 2 is a schematic structural diagram of the present application with the protective cover removed;

Figure 3 is a partial structural schematic diagram of the present application, mainly showing the structure of the lifting device;

Figure 4 is a schematic structural diagram of the detection device in this application;

Figure 5 is a schematic structural diagram of the present application;

Figure 6 is a schematic structural diagram of the positioning device, mobile platform and driving device in this application;

Figure 7 is a schematic structural diagram of the detection device with a buffer in this application;

Figure 8 is a schematic structural diagram of the application with a state adjustment mechanism;

Figure 9 is a schematic structural diagram of the state adjustment mechanism in this application;

Figure 10 is a schematic structural diagram of the detection device on the crossbar in this application.

Labels in the figure:

1. Base; 2. Frame; 3. Cross bar; 4. Detection device; 41. Driving mechanism; 42. Tension pressure sensor; 421. Connecting tube; 422. Slider; 423. Spring; 43. Horizontal pressure block; 44 , fixed plate; 45. sleeve; 46. lifting plate; 47. guide rod; 48. clamping block; 49. connector; 5. lifting device; 51. reduction motor; 52. transmission shaft; 53. screw rod; 54 , transmission gear set; 55. guide rod; 6. positioning device; 61. first positioning plate; 62. first two-way screw; 63. first motor; 64. second positioning plate; 65. second two-way screw ; 66. Second motor; 7. Moving platform; 8. Driving device; 81. Driving screw; 82. Nut; 83. Servo motor; 9. Protective cover; 100. Supporting platform; 200. Adjustment piece; 300. Support Platform; 400, driving parts; 500, supporting parts; 600, laser range finder; 700, electric screw mechanism.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments.

Example 1:

The embodiment of the present application provides a pressure testing device.

Referring to Figures 1 and 2, the pressure testing equipment includes a base 1, a frame 2, a crossbar 3, a detection device 4 and a lifting device 5. Among them, the base 1 is a rectangular plate-shaped structure, which is placed horizontally on the ground. The base 1 is used to provide support and realize the placement of the specimen.

The frame 2 is fixedly installed on the base 1 through bolts, and the frame 2 is a gantry structure. The frame 2 includes four vertical plates and two horizontal plates. The four vertical plates are divided into two groups. The two sets of vertical plates are distributed in the width direction of the base 1, and the two sets of vertical plates are fixed on the opposite sides of the top of the base 1. , two sets of vertical boards are set correspondingly. A plurality of reinforcing plates are fixed between the two vertical plates of each group of vertical plates. Through the arrangement of the reinforcing plates, the structural strength of the frame 2 is ensured. Two horizontal plates are arranged along the width direction of the base 1, and the two ends of the horizontal plates are respectively fixed to the tops of the two corresponding vertical plates on the two sets of vertical plates.

In addition, gussets (not shown in the figure) can be installed on the base 1 by bolts. The gussets are located on the opposite sides of the two vertical boards in each set of vertical boards. The gussets and vertical boards are fixed by bolts.

The cross bar 3 is installed on the frame 2. The cross bar 3 is arranged horizontally along the width direction of the base 1. The cross bar 3 can move up and down on the frame 2. The detection device 4 is fixed on the crossbar 3 and is used to detect the strength of the test piece. The lifting device 5 is installed on the frame 2. The lifting device 5 is connected to the cross bar 3. The lifting device 5 drives the cross bar 3 to perform lifting movement in the vertical direction. The height of the detection device 4 is adjusted through the lifting device 5 to facilitate pressure testing of specimens within a certain height range, thereby improving the applicability of the pressure testing device.

Referring to Figures 2 and 3, in this embodiment, a lifting device 5 is specifically disclosed. The lifting device 5 includes a reduction motor 51 , a transmission shaft 52 , a screw rod 53 and a transmission gear set 54 .

Specifically, a support base is fixed between the two horizontal plates on the top of the frame 2, and the reduction motor 51 is fixed on the support base. The transmission shaft 52 is connected to the reduction box on the reduction motor 51. The transmission shaft 52 is rotatably installed on the top of the frame 2. The transmission shaft 52 is arranged along the width direction of the base 1. The two ends of the transmission shaft 52 are respectively located on both sides of each set of vertical plates. between vertical boards. The number of screw rods 53 is two. The two vertical rods are vertically arranged between the two vertical plates of each group of vertical plates. Each screw rod 53 is rotationally connected between the two reinforcing plates of each group of vertical plates. Each screw rod 53 is threadedly connected to the end of the cross bar 3 respectively. The transmission gear set 54 is arranged into two groups. Each transmission gear set 54 includes two mutually meshing bevel gears. The two bevel gears are respectively fixed on the ends of the screw rod 53 and the transmission shaft 52 .

When the lifting device 5 lifts and lowers the detection device 4, the reduction motor 51 drives the transmission shaft 52 to rotate. The transmission shaft 52 drives the two screw rods 53 to rotate synchronously through the transmission gear set 54, and drives the crossbar 3 to perform a stable lifting movement.

In order to ensure the stability of the operation of the cross bar 3, a guide rod 55 is fixed between the two reinforcing plates of each set of vertical plates. The guide rod 55 passes through the end of the cross bar 3 and is slidably matched with the cross bar 3.

Referring to Figure 1, in addition, protective covers 9 are fixed on both sides of the frame 2. The protective covers 9 are made of metal plates and are surrounded by a shell structure on the vertical plates of the frame 2. There are openings on opposite sides of the two protective covers 9. Avoid the holes in crossbar 3 and drive shaft 52. The protective cover 9 protects the screw rod 53 structure and the transmission gear set 54 structure, and protects the lifting structure, effectively ensuring its service life. At the same time, the safety of the pressure detection device 4 is ensured.

Referring to FIGS. 2 and 4 , in this embodiment, the detection device 4 includes a driving mechanism 41 , a tension pressure sensor 42 and a horizontal pressure block 43 . Specifically, a mounting seat is fixed on the cross bar 3, and the mounting seat is sleeved on the cross bar 3. The mounting seat is fixed on the cross bar 3 through bolts, and the position of the detection device 4 on the cross bar 3 can be adjusted. The driving mechanism 41 is installed on one side of the mounting base. The driving mechanism 41 is arranged vertically. Generally, the driving mechanism 41 is arranged as a cylinder.

The tension pressure sensor 42 is fixed at the bottom of the cylinder piston rod, and the cylinder drives the tension pressure sensor 42 to perform lifting movements. The tension pressure sensor 42 is an existing technology and will not be described in detail here. The horizontal pressure block 43 is fixed at the bottom of the tension pressure sensor 42, and is used to contact the test piece and perform pressure detection on the test piece.

In order to improve the accuracy of the test piece detection by the detection device 4, an L-shaped fixing plate 44 is fixed on the mounting base. The cylinder body of the cylinder is fixed on the fixing plate 44. The sleeve 45 is fixed on the fixing plate 44 with bolts. The barrel 45 is passed through the fixed plate 44. The end of the cylinder piston rod is connected to a lifting plate 46. The pulling pressure sensor 42 is fixed on the bottom of the lifting plate 46. A vertical guide rod 47 is fixed on the lifting plate 46. The guide rod 47 passes through the sleeve 45 and is connected with the sleeve 45. Slip fit.

In order to facilitate the disassembly of the cylinder and the lifting plate 46, two L-shaped clamping blocks 48 are fixed on the top of the lifting plate 46. A T-shaped cavity is formed between the two clamping blocks 48. The end of the cylinder piston rod is fixed with The connector 49 is adapted to the T-shaped cavity. The connector 49 has a stepped cylindrical structure, and two corresponding slots are provided in the small head section of the connector 49. The slots are used for the opposite side of the clamping block 48. The connector 49 can slide from one end of the clamping block 48 into the T-shaped cavity.

In addition, a motor and a gear can be installed on the mounting base. The motor drives the gear to rotate, and the rack is fixed on the cross bar 3. Through the rotation of the motor, the position of the detection device 4 on the cross bar 3 is adjusted. This solution is used for multi-point inspection of test pieces.

In this embodiment, another technical solution of a pressure testing device is provided:

Referring to Figures 5 and 6, a mobile platform 7 with a rectangular plate-like structure is slidably installed on the base 1. The mobile platform 7 is used to place the test piece. The mobile platform 7 can slide from one end of the length of the base 1 to just below the detection device 4 . A driving device 8 is installed on the base 1, and the driving device 8 drives the mobile platform 7 to slide on the base 1. The arrangement of the mobile platform 7 and the driving device 8 facilitates the movement of the test piece directly below the detection device 4 to detect the test piece, and prevents the test piece from being damaged when moving on the base 1 .

At the same time, a positioning device 6 is installed on the mobile platform 7. The size of the positioning device 6 can be adjusted and used to position the test piece.

In this embodiment, the driving device 8 includes a driving screw 81 , a nut 82 and a servo motor 83 . The mobile platform 7 is slidably installed on the base 1 through the linear rail slider structure. The driving screw 81 is rotated and installed on the base 1. The nut 82 is threaded with the driving screw 81. The nut 82 is fixed at the bottom of the mobile platform 7. The servo motor 83 is fixedly installed on the base 1, and the servo motor 83 is connected with the driving screw 81. In the initial state, the mobile platform 7 is located at the end of the base 1 to facilitate the placement of the test piece on the mobile platform 7; after the test piece is placed on the mobile platform 7, the servo motor 83 starts to drive the driving screw 81 to rotate. 81 is threaded with the nut 82 to move the mobile platform 7 to just below the detection device 4; after completing the detection, the driving device 8 drives the mobile platform 7 to return to the end of the base 1.

The positioning device 6 includes a transverse adjustment component and a longitudinal adjustment component.

Specifically, the lateral adjustment assembly includes a first positioning plate 61 , a first two-way screw rod 62 and a first motor 63 .

There are two first positioning plates 61 , and the first positioning plates 61 are arranged along the length direction of the base 1 . A plurality of installation slots are provided on the top of the mobile platform 7, and the installation slots are arranged along the width direction of the base 1. Among them, a first two-way screw rod 62 is rotatably installed in the installation slot located in the middle of the mobile platform 7. The first two-way screw rod 62 It is threadedly connected to the first positioning plate 61 and is fixed with horizontal rods in the installation grooves on both sides of the mobile platform 7. The horizontal rods pass through the first positioning plate 61 and are slidably matched with it. By moving the first two-way screw rod 62, the two first positioning plates 61 move toward or away from each other. The first motor 63 is fixed on one side of the moving platform 7 , and is connected to the first two-way screw mandrel 62 for driving the first two-way screw mandrel 62 to rotate.

The longitudinal adjustment assembly includes a second positioning plate 64 , a second two-way screw rod 65 and a second motor 66 .

The number of the second positioning plates 64 is four, and two second positioning plates 64 are slidably provided on each first positioning plate 61 . A sliding groove is provided on the first positioning plate 61, and one end of the second positioning plate 64 passes through the sliding groove and is slidably matched with it. The second two-way screw rod 65 is rotatably installed on the opposite side of the two first positioning plates 61 . Each second two-way screw rod 65 is threadedly connected with two second positioning plates 64 . Rotate the second two-way screw rod 65, and the two second positioning plates 64 on the second rotating screw rod 53 move toward or away from each other. The second motor 66 is fixedly installed on the second positioning plate 64 , and is connected to the second two-way screw rod 65 .

In actual use, after the test piece is placed on the mobile platform 7, the first motor 63 is started, causing the two first positioning plates 61 to move toward each other to adjust the lateral position of the test piece. After the lateral position adjustment is completed; the two second positioning plates 61 move toward each other. The motor 66 starts synchronously and drives the second positioning plate 64 to move in opposite directions to adjust the longitudinal position of the test piece. After completing the longitudinal position adjustment; after completing the position adjustment of the test piece, the driving device 8 moves the mobile platform 7 to the detection device 4 directly below.

Referring to Figure 7, in the above embodiment, in order to avoid that a large and sudden pressure will damage the pressure detection equipment and reduce its service life during the detection process, a buffer is provided between the tension pressure sensor 42 and the lifting plate 46. , Preferably, the buffering member includes a connecting tube 421, a slider 422 and a spring 423. The connecting tube 421 is installed at the bottom of the lifting plate 46. A sliding cavity is provided in the connecting tube 421, and the sliding block 422 is slidably connected to the sliding cavity. The spring 423 is elastically connected to the inner wall of the sliding chamber, and the top of the tension pressure sensor 42 is fixed through the rod and the slider 422 .

During the pressure detection process, the pulling pressure sensor 42 will drive the slider 422 to slide in the sliding cavity in the connecting barrel 421, squeezing the spring 423, and playing a buffering role, thereby preventing the pulling pressure caused by excessive pressure. Damage to the sensor 42 improves the safety performance and service life of the device.

In addition, the above technical solution is used to perform pressure testing on test pieces whose top surface is on a horizontal plane (after the test piece is placed on the mobile platform 7). For test pieces whose top surface is not on a horizontal plane, effective pressure testing cannot be performed. .

Referring to Figures 8 and 9, in order to solve the above-mentioned problems, this application also includes a state adjustment mechanism. The state adjustment structure is used to make the top surface of the specimen horizontal. The state adjustment mechanism is installed between the mobile platform 7 and the driving device 8. .

Specifically, the state adjustment mechanism includes a support table 100 and an adjustment piece 200. The support table 100 is installed on the driving device 8. The adjustment piece 200 is installed on the top of the support table 100. The adjustment piece 200 is connected to the mobile platform 7, and the adjustment piece 200 drives the movement. The platform 7 adjusts the angle in all directions so that the top surface of the specimen is horizontal.

In this embodiment, the adjusting member 200 includes a support 300 and a driving member 400. The upper and lower surfaces of the support 300 are respectively connected to the support 100 and the mobile platform 7 through supports. The support 300 is along the length direction of the support 100. Rotally connected to the support platform 100, the mobile platform rotates with the support platform 300 along the width direction of the support platform 100. The driving member 400 drives the support platform 300 and the mobile platform 7 to rotate respectively, and adjusts the top surface of the specimen to be in a horizontal state.

Of course, the driving member 400 can be an electric telescopic rod or a motor. Preferably, the driving member 400 is an electric telescopic rod to drive the top surface of the test piece to adjust. When the driving component 400 is a motor, the motor drives the top surface of the test piece to adjust through gear meshing.

In addition, the adjusting member 200 also includes a support member 500. The support member 500 is four electric support rods. The ends of the four electric support rods are fixed on the support platform 100. The ends of the telescopic rods of the four electric support rods are arranged in a hemispherical shape. , four electric support rods are used to support the mobile platform 7 after the top surface of the specimen is adjusted to level to ensure the stability of the mobile platform.

In addition, the driving member 400 can also be three electric push rods, and the two ends of the electric push rods are ball-jointed with the support platform 100 and the mobile platform 7 respectively.

During use, after the test piece is placed on the mobile platform, the positioning device 6 positions the test piece, and the driving device 8 moves the test piece below the detection device 4 . Afterwards, the offset angle between the top surface of the test piece and the horizontal plane needs to be measured. Therefore, a laser rangefinder 600 is installed on the frame 2 or the crossbar 3. The laser rangefinder 600 is an existing technology. The laser rangefinder 600 It is used to measure the vertex angle distance to the top surface of the test piece, and the laser rangefinder 600 transmits the measured data to the processor. The processor processes the data and calculates that when the top surface of the test piece is on a horizontal plane, by adjusting The operation of the test piece 200 makes the top surface of the test piece in a horizontal state, and then the support member 500 supports the moving platform 7 .

Since the position of the top surface of the test piece changes after adjusting the position state of the test piece, it is easy to cause a large deviation between the center of the top surface of the test piece and the position of the detection device 4, which can easily lead to a large error in the pressure detection of the test piece.

Referring to Figure 10, in order to solve this problem, the detection device 4 is driven to slide on the crossbar 3, and the drive can be an electric screw mechanism 700. At the same time, the drive device 8 drives the mobile platform 7 to move; through the laser rangefinder 600 In cooperation with the processor, an adjustment instruction is issued so that the detection device 4 is located directly above the top surface of the test piece.

Example 2:

This embodiment provides a pressure testing method, which is based on the above-mentioned testing device and includes the following steps:

S1. According to the height of the test piece to be tested, adjust the height of the detection device 4 through the lifting device 5;

S2. Move the test piece to be tested to the base 1, and place the test piece to be tested directly below the detection device 4;

S3. The computer control system sets the force value, and the detection device 4 performs a pressure test on the specimen;

S4. When the damage to the specimen reaches the set level of damage or the test reaches the specified number of tests, the device automatically stops, and the computer control system performs statistical processing of the data and outputs the results;

Specifically, step S2 includes:

S21. The driving device 8 drives the mobile platform 7 to move to the end of the base 1, and places the specimen on the mobile platform 7;

S22. The transverse adjustment component in the positioning device 6 positions the test piece laterally, and the longitudinal adjustment component positions the test piece longitudinally so that the test piece is centered on the mobile platform 7;

S23. The driving device 8 moves the mobile platform 7 to directly below the detection device 4.

In addition, for the case where the top surface of the specimen is on a non-horizontal surface, in order to ensure the accuracy of the pressure detection of the specimen, step S2 also includes:

S24. Adjust the position of the test piece so that the top surface of the test piece is in a horizontal state. The position of the test piece is adjusted through the state adjustment mechanism so that the top surface of the test piece is in a horizontal state. Then, the position of the test piece is further adjusted so that the center of the test piece is basically directly below the detection device 4 .

Correspondingly, the position of the detection device 4 can also be adjusted so that the detection device 4 is facing the top surface of the test piece.

The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can, within the technical scope disclosed in the present invention, implement the technical solutions of the present invention. Equivalent substitutions or changes of the inventive concept thereof shall be included in the protection scope of the present invention.

Claims (10)

1. A pressure testing apparatus, comprising:

the test piece test device comprises a base (1), wherein the base (1) is used for providing support and realizing the placement of a test piece;

a frame (2), wherein the frame (2) is arranged on the base (1);

the cross rod (3), the cross rod (3) is lifted and lowered on the frame (2);

the detection device (4) is arranged on the cross rod (3), and the detection device (4) is used for detecting the strength of a test piece;

the lifting device (5) is arranged on the frame (2), the lifting device (5) is connected with the cross rod (3), and the lifting device (5) drives the cross rod (3) to do lifting movement;

the detection device (4) comprises:

the driving mechanism (41) is vertically arranged on the cross rod (3), and the driving mechanism (41) is an air cylinder;

the pulling pressure sensor (42) is arranged at the bottom of the driving mechanism (41), and the driving mechanism (41) drives the pulling pressure sensor (42) to do lifting movement;

the horizontal pressing block (43) is arranged at the bottom of the tension pressure sensor (42), and the horizontal pressing block (43) is used for being in contact with a test piece;

the lifting device (5) comprises:

a gear motor (51), wherein the gear motor (51) is arranged at the top of the frame (2);

the transmission shaft (52) is horizontally arranged at the top of the frame (2), the transmission shaft (52) is rotationally connected with the top of the frame (2), and the speed reducing motor (51) drives the transmission shaft (52) to rotate;

the number of the screw rods (53) is two, the two screw rods (53) are vertically arranged on two sides of the length of the frame (2), the screw rods (53) are rotationally connected with the frame (2), and the screw rods (53) are in threaded connection with the end parts of the cross bars (3);

the transmission gear set (54) is arranged at the end parts of the transmission shaft (52) and the screw rod (53), and the transmission gear set (54) is used for transmission between the transmission shaft (52) and the screw rod (53);

the number of the guide rods (55) is two, the guide rods (55) are vertically arranged at two ends of the length of the frame (2), and the guide rods (55) penetrate through the end parts of the cross rods (3) and are in sliding fit with the cross rods (3).

2. A pressure testing device according to claim 1, characterized in that the bottom of the cylinder is provided with a fixing plate (44), a sleeve (45) is arranged on the fixing plate (44) in a penetrating manner, a lifting plate (46) is connected to the piston rod of the cylinder, the tension and pressure sensor (42) is fixed at the bottom of the lifting plate (46), a vertical guide rod (47) is arranged on the lifting plate (46), and the guide rod (47) penetrates through the sleeve (45) and is in sliding fit with the sleeve (45).

3. A pressure testing device according to claim 2, wherein a clamping block (48) is fixed at the top of the lifting plate (46), a T-shaped concave cavity is formed on the clamping block (48), a connector (49) matched with the T-shaped concave cavity is fixed at the end of the piston rod of the air cylinder, and the connector (49) can slide into the T-shaped concave cavity from one end of the clamping block (48).

4. Pressure testing device according to claim 1, characterized in that the base (1) is provided with positioning means (6) of adjustable dimensions, the positioning means (6) being used for positioning the test piece.

5. A pressure testing device according to claim 4, characterized in that the positioning means (6) comprise a lateral adjustment assembly and a longitudinal adjustment assembly;

the lateral adjustment assembly includes:

the number of the first positioning plates (61) is two, and the first positioning plates (61) are arranged along the length direction of the base (1);

the first bidirectional screw rod (62), the first bidirectional screw rod (62) is rotatably arranged in the base (1), the two first positioning plates (61) are in threaded fit with the first bidirectional screw rod (62), and the first positioning plates (61) are slidably arranged on the base (1); the first bidirectional screw rod (62) is rotated, and the two first positioning plates (61) move towards or away from each other;

the first motor (63), first motor (63) set up on base (1), first motor (63) are connected with first two-way lead screw (62).

The longitudinal adjustment assembly includes:

the number of the second positioning plates (64) is four, and two second positioning plates (64) are correspondingly arranged on each first positioning plate (61) in a sliding manner;

the second bidirectional screw rods (65) are rotatably arranged on the opposite sides of the two first positioning plates (61), and each second bidirectional screw rod (65) is connected with two second positioning plates (64) in a threaded manner; rotating the second bidirectional screw rod (65), and enabling the two second positioning plates (64) to move towards or away from each other;

and the second motor (66) is arranged on the second positioning plate (64), and the second motor (66) is connected with the second bidirectional screw rod (65).

6. The pressure test equipment according to claim 5, wherein the base (1) is provided with a moving platform (7) sliding along the length direction of the base (1), the positioning device (6) is arranged on the moving platform (7), the base (1) is provided with a driving device (8), and the driving device (8) drives the moving platform (7) to reciprocate on the base (1) to move the test piece to the position right below the detection device (4).

7. The pressure test equipment according to claim 6, wherein the driving device (8) comprises a driving screw (81), a nut (82) and a servo motor (83), the moving platform (7) is slidably arranged on the base (1), the driving screw (81) is rotatably arranged on the base (1), the nut (82) is in threaded fit with the driving screw (81), the nut (82) is fixed with the moving platform (7), the servo motor (83) is arranged on the base (1), and the servo motor (83) is connected with the driving screw (81).

8. Pressure testing device according to claim 1, characterized in that the frame (2) is provided with a protective cover (9) on both sides, which protective cover (9) is used for protecting the drive gear set (54) and the screw (53).

9. A pressure testing method based on a pressure testing device according to any one of claims 1-8, characterized by comprising the steps of:

s1, according to the height of a test piece to be detected, adjusting the height of a detection device (4) through a lifting device (5);

s2, moving the test piece to be detected onto the base (1), and placing the test piece to be detected under the detection device (4);

s3, setting a force value by a computer control system, and performing pressure test on the test piece by a detection device (4);

and S4, automatically stopping the device when the damage of the test piece reaches the set damage degree or the test reaches the set test times, and carrying out data statistics processing and outputting a result by a computer control system.

10. The pressure testing method according to claim 1, wherein the step S2 comprises:

s21, driving the mobile platform (7) to move to the end part of the base (1) by the driving device (8), and placing the test piece on the mobile platform (7);

s22, positioning the transverse position of the test piece by a transverse adjusting component in the positioning device (6), and positioning the longitudinal position of the test piece by a longitudinal adjusting component so that the test piece is centered on the moving platform;

s23, the driving device (8) moves the moving platform (7) to the position right below the detection device (4).