CN118150318B - Full-automatic weight loading mechanical creep testing machine - Google Patents
Full-automatic weight loading mechanical creep testing machine Download PDFInfo
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- CN118150318B CN118150318B CN202410580521.2A CN202410580521A CN118150318B CN 118150318 B CN118150318 B CN 118150318B CN 202410580521 A CN202410580521 A CN 202410580521A CN 118150318 B CN118150318 B CN 118150318B
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- 238000001514 detection method Methods 0.000 claims abstract description 48
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- 230000003014 reinforcing effect Effects 0.000 claims description 11
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- 150000003839 salts Chemical class 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/14—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by dead weight, e.g. pendulum; generated by springs tension
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a full-automatic weight loading mechanical creep testing machine, which relates to the technical field of testing equipment and comprises a main machine frame; a variable ratio lever assembly for providing a loading force for the test and having an adjustable lever ratio; a sample holder connected to the variable ratio lever assembly for mounting a sample; the leveling assembly is arranged on the host frame and used for adjusting the balance state of the variable ratio lever assembly in the test process; the variable ratio lever assembly includes: a lever assembly provided with a fulcrum blade; the vernier weight assembly is arranged on the lever assembly and used for loading weights; the vernier weight assembly is connected with the balance weight assembly, the balance weight assembly is used for adjusting the lever assembly so that the vernier weight assembly is in a horizontal state integrally when the vernier weight assembly is positioned at the fulcrum blade, and the automatic leveling detection assembly is arranged on the lever assembly and used for automatically leveling the lever assembly. The full-automatic weight loading mechanical creep testing machine has the advantages that the lever proportion is flexible and adjustable, and the relaxation test, the automatic sectional loading and the combined test can be realized.
Description
Technical Field
The invention relates to the technical field of test equipment, in particular to a full-automatic weight loading mechanical creep testing machine.
Background
Along with the rapid development of science and technology, the demand for the intellectualization of test equipment in the modern industrial fields such as petrochemical industry, energy sources, aerospace and the like is continuously improved.
At present, the creep testing machines on the market are mainly divided into an electronic creep testing machine and a mechanical creep testing machine, and the mechanical creep testing machine has more stable and reliable performance and is suitable for long-time tests, so that the application is wider.
For example, publication No.: the invention patent of CN334073U discloses a creep testing machine, which comprises a leveling motor, a speed reducer, a V-shaped transmission belt, a screw pair and a synchronous tooth-shaped transmission belt which are in transmission connection, wherein the screw pair is connected with an automatic centering device of a lower clamp, the automatic centering device of an upper clamp is connected with one end of a lever, the other end of the lever is connected with a pre-load weight, and the lever ratio is 1:100. However, this patent only allows a single test to be performed on one sample, the test efficiency is low, and the lever ratio is fixed at 1:100, and the test flexibility is poor.
The mechanical creep testing machine mainly applies test force to the test sample in a mode of loading weights by a lever. However, most of the testing machines adopt a loading form of fixed lever ratio and weight, and the testing requirements can be met for simple operation tests, but for tests requiring complex requirements, such as relaxation tests, automatic sectional loading, automatic combined loading and combined tests of at least two groups in low-cycle fatigue tests, the traditional mechanical weight loading form is difficult to meet the functional, simple and efficient use requirements of users on testing equipment.
In view of this, it is a technical problem that needs to be solved by those skilled in the art how to provide a testing machine with an adjustable lever ratio in the case of mechanical loading, and which can realize relaxation test, automatic sectional loading, automatic combined loading, and low cycle fatigue test.
Disclosure of Invention
The invention aims to provide a full-automatic weight loading mechanical creep testing machine, the lever proportion of which can be flexibly adjusted within a preset range or steplessly adjusted, and the testing requirements of relaxation test, automatic sectional loading, automatic combined loading and low-cycle fatigue test are met.
In order to achieve the above object, the present invention provides a full-automatic weight loading mechanical creep testing machine, comprising:
a host frame; the variable ratio lever assembly is arranged on the host frame and used for providing loading force for the test and has adjustable lever proportion; a sample holder connected to the variable ratio lever assembly for mounting a sample; the leveling assembly is arranged on the host frame and used for adjusting the balance state of the variable ratio lever assembly in the test process;
The variable ratio lever assembly includes: a lever assembly provided with a fulcrum blade; the vernier weight assembly is arranged on the lever assembly and used for loading weights; the automatic leveling detection assembly is connected with the cursor weight assembly, is used for adjusting the lever assembly, is used for enabling the cursor weight assembly to be in a horizontal state integrally when the cursor weight assembly is positioned at the fulcrum blade, and is arranged in the lever assembly and is used for automatically leveling the lever assembly.
In some embodiments, the lever assembly comprises:
A lever body;
a ball screw provided at an upper portion of the lever body;
The stepping motor is connected with the ball screw and used for driving the ball screw to run;
the linear guide rail is fixedly arranged on the top surface of the lever body and used for the cursor weight assembly to operate;
Further comprises:
a force point blade bearing connected with the fulcrum blade;
The device comprises a main frame, a cross beam frame, a tool bearing seat, a stop block, a fulcrum blade and a force point blade, wherein the cross beam frame is fixedly arranged on the main frame, the tool bearing seat is positioned on two sides of the lever body, the stop block is fixedly arranged on the tool bearing seat, the force point blade is arranged on the fulcrum blade and used for fixing a force point on a lever body in a hanging mode, the lower end of the force point is fixedly connected with an upper pull rod of a sample clamp, and the fulcrum blade falls on each tool bearing seat.
In some embodiments, the vernier weight assembly comprises an upper weight and a lower weight, the upper weight is fixedly mounted on the slide block of the linear guide rail and connected with the ball screw, and the lower weight is detachably mounted at two ends of the upper weight.
In some embodiments, the weight assembly includes a cover plate fixedly connected to an end surface of the lever body, a weight plate fixedly connected to an inner side surface of the cover plate, and two weight blocks fixedly connected to a bottom surface of the weight plate, wherein the weight blocks are used for adjusting levelness of the lever body when the upper weight is at the fulcrum blade.
In some embodiments, the lever further comprises a zero position detection assembly and an initial position detection assembly, wherein the zero position detection assembly and the initial position detection assembly are arranged on the cross beam frame and used for detecting the horizontal zero position of the lever body;
The initial position detection assembly comprises a switch plate fixedly arranged at the tail end of the lever body, a horizontal zero point bracket fixedly arranged on the cross beam frame and a first proximity switch fixedly arranged on the horizontal zero point bracket;
The zero position detection assembly comprises a zero bracket, a first correlation switch and a zero stop piece, wherein the zero stop piece is used for sensing the first correlation switch so as to determine the zero position of the lower weight.
In some embodiments, the device further comprises a fracture detection component arranged on the beam frame and used for detecting the fracture and the fracture time of the sample;
the fracture detection assembly comprises a swing rod, a fracture detection sensor and a shock pad.
In some embodiments, the device further comprises a scale rod arranged at the left side and the right side of the tail end of the lever body and used for measuring the position change of the up-and-down floating of the lever body, a pointer fixedly connected to the bottom of the scale rod, and a scale fixedly connected to the beam frame and provided with scales.
In some embodiments, the vernier weight assembly further comprises a weight limiting assembly for detecting the travel of the vernier weight assembly;
the weight limiting assembly comprises a support fixedly installed on a beam frame, a travel switch fixedly installed on the support, and a bump block installed on the lower weight, and when the cursor weight assembly moves, the travel of the cursor weight assembly is detected by contacting with the travel switch.
In some embodiments, the sample holder comprises: the device comprises an upper pull rod connected with the force point hanger, a universal joint upper sleeve arranged at the lower end of the upper pull rod, a first universal joint rod connected with the lower end of the universal joint upper sleeve, a first positioning sleeve sleeved on the universal joint upper sleeve, a connecting rod connected with the lower end of the first universal joint rod and a chuck connected with the lower end of the connecting rod; the device also comprises a second universal joint rod, a universal joint lower sleeve connected to the lower end of the second universal joint rod and a second positioning sleeve sleeved on the second universal joint rod; the sample is connected to the collet and the second gimbal rod.
In some embodiments, the leveling assembly includes: the reinforcing beam is arranged above the mounting seat and fixedly arranged on the workbench; further comprises: the variable-frequency driving assembly is rotatably arranged on the leveling ball screw of the reinforcing beam, can drive the leveling ball screw to rotate and provides variable-frequency driving force for the transmission assembly; the lower end of the leveling ball screw is fixedly connected with a guide wall, the guide wall is slidably connected to a guide seat, the end part of the guide wall is also connected with an L-shaped collision block, and the guide seat is provided with a limit switch which can sense the L-shaped collision block and control the movement stroke of the guide wall.
The full-automatic weight loading mechanical creep testing machine provided by the application has the following technical advantages:
the proportion can be adjusted at will within a preset range through the lever structure in the variable ratio lever assembly, the lever ratio smaller than 1 can be adopted for loading, the equipment flexibility is better, and the application range is wider;
The tester is integrated with the testers with multiple independent functions, can test multiple samples simultaneously, supports multiple tests such as creep test and relaxation test, can perform the same test and different tests, and keeps the independence of the tests, and the tests are more efficient;
According to the application, the load on a loading sample is adjusted by changing the weight of the vernier weight on the vernier weight assembly, so that energy is saved, and the load value is repeated and accurate to +/-1N;
4. the application has compact layout, high precision, accurate and efficient test, effectively improves the test efficiency and reduces the test cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic three-dimensional structure of a full-automatic weight loading mechanical creep testing machine provided by the application;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a schematic three-dimensional structure of a mainframe provided by the present application;
FIG. 4 is a side view of FIG. 3;
FIG. 5 is a schematic three-dimensional view of a variable ratio lever assembly according to the present application;
FIG. 6 is a schematic view of another angular three-dimensional structure of a variable ratio lever assembly provided by the present application;
FIG. 7 is a side view of FIG. 6;
FIG. 8 is a cross-sectional view taken at the A-A location of FIG. 5;
FIG. 9 is a schematic three-dimensional structure of the initial position detecting assembly according to the present application;
fig. 10 is a schematic three-dimensional structure of the zero position detecting assembly provided by the present application;
FIG. 11 is a schematic three-dimensional view of the self-leveling detection assembly provided by the present application;
FIG. 12 is a schematic three-dimensional structure of a weight stop assembly provided by the present application;
FIG. 13 is a schematic three-dimensional structure of a measuring assembly according to the present application;
FIG. 14 is a schematic three-dimensional structure of a fracture detection assembly according to the present application;
FIG. 15 is a schematic three-dimensional view of a sample holder according to the present application;
FIG. 16 is a front view of a sample holder provided by the present application;
FIG. 17 is a schematic view of a three-dimensional structure of one angle of a leveling assembly provided by the present application;
FIG. 18 is a front view of FIG. 1;
the device comprises a 1-mainframe frame, a 2-variable ratio lever assembly, a 3-sample clamp, a 4-leveling assembly and a 5-sample, wherein the 1-mainframe frame is provided with a plurality of first and second end plates;
101-workbench, 102-beam frame, 103-column, 104-upper shield, 105-lifting lug, 106-manual box support, 107-angle steel column, 201-fulcrum blade, 202-vernier weight assembly, 203-automatic leveling detection assembly, 204-lever body, 205-ball screw, 206-stepper motor, 207-linear guide rail, 209-force point blade, 212-knife rest, 213-initial position detection assembly, 214-zero position detection assembly, 215-measuring assembly, 216-fracture detection assembly, 218-weight limit assembly, 219-force point hanger, 220-stop, 221-cover plate, 222-counterweight plate, 223-counterweight weight, 224-mounting plate, and 225-reinforcing beams, 226-motor brackets, 227-couplings, 301-upper tie rods, 302-universal joint upper sleeves, 303-first universal joint rods, 304-first positioning sleeves, 305-connecting rods, 306-chucks, 307-second universal joint rods, 308-universal joint lower sleeves, 309-second positioning sleeves, 310-lower tie rods, 311-connecting pins, 401-mounting seats, 402-reinforcing beams, 403-guide seats, 404-ball bearings, 405-guide walls, 406-leveling ball screws, 407-spindles, 408-limit switches, 409-variable frequency motors, 410-belts, 411-reducers, 412-toothed belt sets, 413-screw dust covers and 414-L-shaped bumps;
The weight comprises an upper weight, a 2022-lower weight, a 2031-second correlation switch, a 2032-switch seat, a 2033-bracket, a 2034-leveling baffle, a 2141-zero bracket, a 2142-first correlation switch, a 2143-zero baffle, a 2131-switch board, a 2132-first proximity switch, a 2133-horizontal zero bracket, a 2151-scale bar, a 2152-pointer, a 2153-scale bar, a 2161-swing bar, a 2162-fracture detection sensor, a 2163-damping rubber, a 2164-buffer, a 2181-bracket, a 2182-travel switch and a 2183-bump.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The present invention will be further described in detail below with reference to the drawings and detailed description for the purpose of enabling those skilled in the art to better understand the aspects of the present invention.
Referring to fig. 1 to 4, fig. 1 is a schematic three-dimensional structure of a full-automatic weight loading mechanical creep testing machine provided by the application; FIG. 2 is an exploded view of a fully automatic weight loading mechanical creep testing machine provided by the present application; FIG. 3 is a cross-sectional view of FIG. 1; fig. 4 is a schematic three-dimensional structure of a base of a thermal salt depth sensing instrument according to the present application.
The application provides a full-automatic weight loading mechanical creep testing machine, which mainly comprises: a mainframe frame 1, a variable ratio lever assembly 2, a sample fixture 3 and a leveling assembly 4.
The mainframe frame 1 adopts a standard frame of a testing machine, and is provided with a workbench 101, a beam frame 102 and four upright posts 103, wherein the beam frame 102 is arranged on the upper part of the workbench 101, and the workbench 101 and the beam frame 102 are arranged in parallel. The workbench 101 is formed by splicing angle steel upright posts 107 and panels. Four posts 103 connect the table 101 and the beam 102, and fix the beam 102 to the table 101. The beam 102 and the upper shield 104 form a lever assembly mount, and the variable ratio lever assembly 2 is disposed inside the lever assembly mount and is fixed to the beam 102 by a connector. Lifting lugs 105 are also provided on the beam frame 102 for ease of handling. The mainframe frame 1 provides support for the entire test apparatus. The leveling assembly 4 is fixedly mounted on the workbench 101 and maintains a leveling state for the variable ratio lever assembly 2 during the test.
The upright post 103 is provided with a manual control box bracket 106, the manual control box bracket 106 is used for installing a manual control box, a control circuit in the manual control box is electrically connected with the variable ratio lever assembly 2, and a worker can start and stop operation and control the operation of the variable ratio lever assembly 2 by operating the manual control box.
The variable ratio lever assembly 2 includes: the lever body 204, this lever body 204 is equipped with fulcrum cutting edge 201, and vernier weight subassembly 202 sets up in the lever subassembly, is used for loading the weight, and the connection vernier weight subassembly 202 is provided with the counter weight subassembly, through the counter weight subassembly adjustment lever subassembly, makes the whole in the horizontality when fulcrum cutting edge 201 department of vernier weight subassembly 202. The automatic leveling detection assembly 203 is arranged on the lever assembly, and the lever assembly is automatically leveled through the automatic leveling detection assembly 203.
The sample fixture 3 is arranged on the main frame 1, the upper end of the sample fixture is connected with the force point suspension of the variable ratio lever assembly 2, and the lower end of the sample fixture is connected with the leveling assembly 4. The sample 5 is detachably mounted on the sample holder 3 by means of screws. The leveling component 4 is arranged in the workbench 101, the upper end of the leveling component is connected with the sample clamp 3, and the leveling component 4 is used for adjusting the balance state of the variable ratio lever component 2 in the test process.
The leveling component 4 is arranged in the workbench 101, and the leveling component 4 is connected with the sample clamp 3 and levels the sample through the sample clamp 3.
Before the sample fixture 3 installs the sample, the variable ratio lever assembly 2 needs to be adjusted to the zero position, that is, the cursor weight assembly 202 is at the zero position, and the horizontal zero position of the lever assembly is ensured. After the sample is installed, the leveling component 4 is opened, leveling is automatically performed, and after the vernier weight component 202 is slowly adjusted to a test force value, the leveling component 4 is closed. During the test, the control system monitors the balance state of the lever assembly at any time, and when the lever assembly is inclined, the leveling assembly 4 works to automatically level the lever assembly.
The application provides a variable lever ratio type mechanical creep relaxation testing machine, which specifically executes the following operations when carrying out relaxation test:
Before the test starts, the balance weight assembly is adjusted to ensure that the whole vernier weight assembly 202 is in a horizontal state when the vernier weight assembly is positioned at the fulcrum blade 201 of the lever assembly (the position is used as the zero position of the vernier weight);
after the sample is installed, the automatic leveling detection assembly 203 is started to automatically level the lever assembly;
the test starts, the control system slowly adjusts the cursor weight assembly 202 to the preload, and the automatic leveling detection assembly 203 continuously levels in the process, so that the lever assembly is ensured to be in a horizontal state;
the control system monitors the load value loaded to the sample, slowly fine-adjusts the vernier weight assembly 202 until the deformation is stable, and records the relaxation test result;
when the sample breaks or the time condition is reached, ending the test;
before a new test starts, the test cursor weight assembly 202 automatically slowly retracts to the zero position.
The lever structure in the variable ratio lever assembly can be arbitrarily adjusted in proportion, the lever ratio smaller than 1 can be adopted for loading, the equipment flexibility is better, and the application range is wider. The application also allows for a relaxation test or creep test of the test specimen.
Please refer to fig. 5to 8. The lever assembly includes a lever body 204, a ball screw 205 provided at an upper portion of the lever body 204, a stepping motor 206 for driving the ball screw 205, a linear guide rail 207 installed at a top surface of the lever body 204, a tool rest 212 fixedly installed at the beam frame 102 and located at both sides of the lever body 204, and a reinforcing beam 225 fixedly installed at the beam frame 102 of the mainframe frame 1.
One end of the linear guide 207 is connected to the stepper motor 206, and the other end is mounted on a mounting plate 224 at the rear end of the lever body 204. The stop 220 is fixedly mounted on the tool holder 212, the fulcrum blade 201 is mounted on both sides of the lever body 204, and the fulcrum blade 201 rests on the tool holder 212 to provide support for the entire variable ratio lever assembly 2. The force point hanging 219 is fixed on the lever body 204 by using the force point cutting edge 209, and the lower end of the force point hanging 219 is fixedly connected with the upper pull rod 301 of the sample clamp 3; also included is a force point hanger 219 that connects the force point blade bearings.
The vernier weight assembly 202 mainly comprises an upper weight 2021 and a lower weight 2022. The upper weight 2021 is fixedly installed on the slider of the linear guide rail 207 and connected with the ball screw 205, and the lower weight 2022 is detachably installed at both ends of the upper weight 2021.
Specifically, the linear guide 207 is fixedly mounted on the lever body 204, the upper weight 2021 is fixedly mounted on the slider of the linear guide 207, and the lower weight 2022 is fixedly mounted at both ends of the upper weight 2021. The test force applied to the test piece was adjusted by changing the mass of the lower weight 2022. The upper weight 2021 is connected to the ball screw 205, and the ball screw 205 is connected to the stepping motor 206 via a coupling 227. The stepper motor 206 is fixedly mounted on a motor mount 226, and the motor mount 226 is fixedly mounted on the lever body 204. The stepping motor 206 provides driving force to the ball screw 205, and the ball screw 205 is driven to drive the upper weight 2021 and the lower weight 2022 to slide along the linear guide rail 207, so that weight loading is realized.
The weight assembly includes a cover plate 221, a weight plate 222, and two weight blocks 223. The cover plate 221 is fixedly connected to the end face of the lever body 204, the weight plate 222 is fixedly connected to the inner side face of the cover plate 221, the two weight pieces 223 are fixedly connected to the bottom face of the weight plate 222, and the weight pieces 223 are used for adjusting the levelness of the lever body 204 when the upper weight 2021 is positioned at the fulcrum blade 201. In other words, the weight 223 is used when adjusting the lever body 204 horizontally, and the weight 223 is adjusted to ensure that the upper weight 2021 is in a horizontal state when the lever body 204 is at the fulcrum blade 201.
As shown in fig. 9 and 10. In order to facilitate detection of the horizontal zero position of the lever body 204, further, a zero position detection unit 214 and an initial position detection unit 213 for detecting the horizontal zero position of the lever body 204 are provided on the cross frame 102 of the mainframe frame 1.
Specifically, the initial position detection unit 213 and the zero position detection unit 214 are fixedly mounted on the beam frame 102 of the mainframe frame 1.
The initial position detection assembly 213 includes a switch plate 2131, a first proximity switch 2132, and a horizontal zero bracket 2133, the horizontal zero bracket 2133 being fixedly mounted to the beam frame 102, the first proximity switch 2132 being fixedly mounted to the horizontal zero bracket 2133, the switch plate 2131 being fixedly mounted to the end of the lever body 204. The switch plate 2131 cooperates with the first proximity switch 2132 to enable initial position detection.
The zero position detection assembly 214 includes a zero support 2141, a first correlation switch 2142, and a zero stop 2143. The zero position baffle 2143 is used for sensing the first opposite-shot switch 2142 so as to determine the zero position of the lower weight. The zero position detecting members 214 are provided in two groups, respectively, on both sides of the distal end of the lever body 204. The zero position baffle 2143 and the first opposite-shot switch 2142 cooperate to determine the zero position of the lower weight.
Before the sample fixture 3 installs the sample 5, the variable ratio lever assembly 2 needs to be adjusted to the zero position, that is, the cursor weight assembly 202 is at the zero position, the first correlation switch 2142 of the zero position detection assembly 214 has a signal, and the first proximity switch 2132 of the initial position detection assembly 213 also has a signal, which is the horizontal zero position of the lever body 204 at this moment.
After a sample is installed, the leveling assembly 4 is opened, leveling is automatically performed, after the vernier weight assembly 202 is slowly adjusted to a test force value, the motor drive of the leveling assembly 4 is closed, and the first correlation switches positioned on two sides of the tail end of the lever body 204 are all free of signals, so that the lever body 204 is always in a horizontal state.
As shown in fig. 11. The automatic leveling detecting members 203 are two groups, and are fixedly installed at both sides of the lever body 204, respectively. The automatic leveling detection assembly 203 mainly includes a second correlation switch 2031, a switch base 2032, a bracket 2033, and a leveling baffle 2034, where the switch base 2032 is fixedly mounted on the beam frame 102, the bracket 2033 is fixedly mounted on the switch base 2032, the second correlation switch 2031 is fixedly mounted on the bracket 2033, the leveling baffle 2034 is fixedly mounted on the end side wall of the lever body 204 through a locking member, and the second correlation switch 2031 determines whether the lever body 204 is leveled by detecting the leveling baffle 2034.
As shown in fig. 12. The weight limiting assembly 218 comprises a support 2181, a travel switch 2182 and a bump block 2183, wherein the support 2181 is fixedly arranged on the beam frame 102, symmetrically arranged on two sides of the lever body 204, and the travel switch 2182 is fixedly arranged on the support 2181. When the vernier weight assembly 202 moves, the bump 2183 mounted on the lower weight 2022 contacts with the travel switch 2182, so that the travel of the vernier weight assembly 202 can be detected.
As shown in fig. 13. In order to facilitate the observation of the position change of the up-and-down floating of the lever body 204, the present invention employs a fixed mounting of the measuring assembly 215 at the end of the lever body 204, and the measuring assembly 215 mainly includes a pointer 2152, a scale rod 2151 and a scale 2153. The pointer 2152 is fixedly mounted on the scale bar 2151, and the scale 2153 is fixedly mounted on the beam frame 102 of the host frame 1. The scale 2153 is provided with a scale, and the up-and-down floating position change of the lever body 204 can be obtained by the scale 2153 indicated by the pointer 2152.
As shown in fig. 14. The break detection assembly 216 basically includes a swing link 2161, a break detection sensor 2162 and a damping rubber 2163. The breaking detection assembly 216 can detect the breaking time of the sample, and after the breaking time of the sample, the lever body 204 is crashed on the breaking detection assembly 216 for a period of time to detect and record the breaking time. The damping rubber 2163 and the damper 2164 fixedly mounted on the cross beam 102 provide a buffer for the lever body 204 at the time of test breaking.
As shown in fig. 15 and 16. The sample holder 3 includes an upper tie rod 301, a gimbal upper sleeve 302, a first gimbal rod 303, a first positioning sleeve 304, a link 305, a collet 306, a second gimbal rod 307, a gimbal lower sleeve 308, and a second positioning sleeve 309. The upper end of the upper pull rod 301 is connected with a force point hanger 219 of the variable ratio lever assembly, and the lower end of the upper pull rod is fixedly connected with a universal joint upper sleeve 302. The upper gimbal sleeve 302 is connected to the gimbal rod and the first positioning sleeve 304 is sleeved on the upper gimbal sleeve 302. The lower end of the first universal joint rod 303 is connected with one end of a connecting rod 305 through a connecting pin 311, the other end of the connecting rod 305 is fixedly connected with one end of a lower pull rod 310, and the other end of the lower pull rod 310 is fixedly connected with a chuck 306.
In addition, the sample fixture 3 further comprises a second universal joint rod 307, a lower universal joint sleeve 308 and a second positioning sleeve 309, wherein the lower end of the second universal joint rod 307 is connected with the lower universal joint sleeve 308, and the second positioning sleeve 309 is sleeved on the second universal joint rod 307. The lower end of the universal joint lower sleeve 308 is fixedly connected with a leveling ball screw of the leveling assembly 4.
When the sample 5 is mounted, the upper end of the sample 5 is connected to the chuck 306, and the lower end thereof is connected to the second gimbal rod 307 via the connection pin 311. The sample fixture 3 is connected with the sample 5 by pins, so that the sample 5 can be conveniently assembled and disassembled rapidly.
As shown in fig. 17 and 18. In one embodiment, the leveling assembly 4 basically includes a mounting block 401, a reinforcement beam 402, a guide holder 403, a ball bearing 404, a guide wall 405, a leveling ball screw 406, an L-shaped bump 414 and a limit switch 408.
The mounting seat 401 is fixedly arranged on a bottom plate inside the workbench 101, and the variable frequency driving assembly is fixed on the mounting seat 401 through a locking piece. The variable frequency drive assembly vertically mounts the guide holder 403 to the mount 401 by a locking member. The reinforcement beam 402 is secured to the top plate of the table by a locking member. The guide holder 403 is vertically connected between the reinforcement beam 402 and the bottom plate.
The reinforcing beam 402 vertically penetrates through the reinforcing beam 406, the middle part of the reinforcing beam 406 is connected with the reinforcing beam 402, the bottom of the reinforcing beam is fixedly connected with the guide wall 405, the guide wall 405 is slidably connected to the guide seat 403, the end part of the guide wall 405 is also connected with an L-shaped bump block 414, and the guide seat 403 is provided with a limit switch 408. The stroke of the ball screw 205 is limited by the collision of the L-shaped bump 414 with the limit switch 408.
The variable frequency drive device includes: variable frequency motor 409, belt 410, decelerator 411 and drive assembly. The drive assembly may be a toothed belt wheel set 412 or a sprocket wheel set. The variable frequency motor 409 is fixedly mounted on the base plate. The main shaft 407 is mounted on the reinforcing beam 402, the toothed belt pulley set 412 is fixedly mounted on the ball screw 205, and the speed reducer 411 is connected with the ball screw 205 through the toothed belt pulley set 412.
An output shaft of the variable frequency motor 409 is connected with a speed reducer 411 through a belt 410, the speed reducer 411 drives the leveling ball screw 406 to rotate through a toothed belt pulley set 412, the leveling ball screw 406 converts the rotating force into a linear force, and a guide wall 405 at the tail end of the leveling ball screw 406 is driven to move along the guide seat 403. A rolling bearing is mounted on the guide wall 405, and the rolling bearing is disposed on the guide wall 405 at a position where the rolling bearing moves relative to the guide seat 403, so that the leveling ball screw 406 moves linearly along the guide seat 403, and the rolling bearing can convert sliding friction into rolling friction, so that friction force generated during movement is greatly reduced.
In addition, the guide holder 403 is provided with a limit switch 408 which can sense the L-shaped bump 414 and control the movement stroke of the guide wall 405. The travel of the leveling ball screw 406 is limited by the collision of the L-shaped bump 414 with the limit switch 408.
Since the output end of the leveling ball screw 406 is long, a screw dust cover 413 may be fitted to the outside of the leveling ball screw 406 in order to prevent dust, foreign matter, and the like from falling into the leveling ball screw.
According to the embodiment, the leveling assembly 4 is integrated, the complex leveling assembly 4 is integrated into the ball screw speed reducer, the installation space is saved, the adjustment is accurate, the dust prevention treatment is carried out, and the service life of the ball screw is prolonged.
The lever structure in the variable ratio lever assembly can be arbitrarily adjusted in the range of 1-N, the lever ratio smaller than 1 can be adopted for loading, the equipment flexibility is better, and the application range is wider. The invention can test a plurality of samples 5 at the same time, and the samples 5 are not interfered with each other, so that the independence of the test is maintained, the same kind of test can be carried out, and different tests can be carried out, so that the test can be carried out more efficiently.
It should be noted that in this specification relational terms such as first and second are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (6)
1. A full-automatic weight loading mechanical creep testing machine, comprising: a host frame (1); the variable ratio lever assembly (2) is arranged on the host frame (1) and is used for providing loading force for the test and is adjustable in lever proportion; a sample holder (3) connected to the variable ratio lever assembly (2) for mounting a sample; the leveling component (4) is arranged on the host frame (1) and used for adjusting the balance state of the variable ratio lever component (2) in the test process;
The variable ratio lever assembly (2) comprises: a lever assembly provided with a fulcrum blade (201); the vernier weight assembly (202) is arranged on the lever assembly and used for loading weights; the vernier weight assembly (202) is connected, the lever assembly is used for adjusting the vernier weight assembly, the balance weight assembly is used for enabling the vernier weight assembly (202) to be in a horizontal state when the fulcrum blade (201) is arranged, and the automatic leveling detection assembly (203) is arranged on the lever assembly and used for automatically leveling the lever assembly;
the lever assembly includes:
A lever body (204);
a ball screw (205) provided on the upper part of the lever body (204);
a stepping motor (206) connected to the ball screw (205) for driving the ball screw (205) to operate;
the linear guide rail (207) is fixedly arranged on the top surface of the lever body (204) and used for the cursor weight assembly (202) to operate;
Further comprises:
a force point blade bearing connected to the fulcrum blade (201);
The device comprises a cross beam frame (102) fixedly arranged on a host frame (1), tool holders (212) positioned on two sides of a lever body (204), a stop block (220) fixedly arranged on the tool holders (212), and a force point cutting edge (209) arranged on a fulcrum cutting edge (201) and used for fixing a force point on the lever body (204), wherein the lower end of the force point hanging is fixedly connected with an upper pull rod (301) of a sample clamp (3), and each fulcrum cutting edge (201) falls on each tool holder (212);
The vernier weight assembly (202) comprises an upper weight (2021) and a lower weight (2022), the upper weight (2021) is fixedly arranged on a sliding block of the linear guide rail (207) and connected with the ball screw (205), and the lower weight (2022) is detachably arranged at two ends of the upper weight (2021);
The counterweight assembly comprises a cover plate (221) fixedly connected to the end face of the lever body (204), a counterweight plate (222) fixedly connected to the inner side face of the cover plate (221), and two counterweight blocks (223) fixedly connected to the bottom face of the counterweight plate (222), wherein the counterweight blocks (223) are used for adjusting the levelness of the lever body (204) when the upper counterweight (2021) is positioned at the fulcrum blade (201);
The levelling assembly (4) comprises: the device comprises an installation seat (401) and a reinforcing beam (402) which is arranged above the installation seat (401) and fixedly installed on a workbench; further comprises: a leveling ball screw (406) rotatably mounted on the reinforcing beam (402), a transmission assembly capable of driving the leveling ball screw (406) to rotate, and a variable frequency driving assembly for providing variable frequency driving force to the transmission assembly; the lower end of the leveling ball screw (406) is fixedly connected with a guide wall (405), the guide wall (405) is slidably connected to a guide seat (403), the end part of the guide wall (405) is also connected with an L-shaped bump block (414), and the guide seat (403) is provided with a limit switch (408) which can sense the L-shaped bump block (414) and control the movement stroke of the guide wall (405);
The automatic leveling detection assembly (203) is in two groups, the two groups of the automatic leveling detection assembly are fixedly installed on two sides of the lever body (204) respectively, the automatic leveling detection assembly (203) comprises a second opposite-shot switch (2031), a switch base (2032), a support (2033) and a leveling baffle (2034), the switch base (2032) is fixedly installed on the beam frame (102), the support (2033) is fixedly installed on the switch base (2032), the second opposite-shot switch (2031) is fixedly installed on the support (2033), the leveling baffle (2034) is fixedly installed on the tail end side wall of the lever body (204) through a locking piece, and the second opposite-shot switch (2031) determines whether the lever body (204) is leveled or not through detecting the leveling baffle (2034).
2. The full-automatic weight loading mechanical creep testing machine according to claim 1, further comprising a zero position detection assembly (214) and an initial position detection assembly (213) provided to the beam frame (102) for detecting a horizontal zero position of the lever body (204);
The initial position detection assembly (213) comprises a switch plate (2131) fixedly arranged at the tail end of the lever body (204), a horizontal zero bracket (2133) fixedly arranged on the beam frame (102) and a first proximity switch (2132) fixedly arranged on the horizontal zero bracket (2133);
The zero position detection assembly (214) comprises a zero bracket (2141), a first opposite-shot switch (2142) and a zero stop piece (2143), wherein the zero stop piece (2143) is used for sensing the first opposite-shot switch (2142) so as to determine the zero position of the lower weight (2022).
3. The full-automatic weight loading mechanical creep testing machine according to claim 1, further comprising a fracture detection assembly (216) provided to the beam frame (102) for detecting a fracture and a fracture time of a sample;
The break detection assembly (216) includes a swing link (2161), a break detection sensor (2162), and a shock pad (2163).
4. The full-automatic weight loading mechanical creep testing machine according to claim 1, further comprising a scale bar (2151) disposed at left and right sides of the end of the lever body (204) for measuring a position change of the lever body (204) floating up and down, a pointer (2152) fixedly connected to the bottom of the scale bar (2151), and a scale (2153) fixedly connected to the beam frame (102) and having a scale.
5. The fully automatic weight loading mechanical creep testing machine according to claim 1, further comprising a weight stop assembly (218) to detect the travel of the cursor weight assembly (202);
The weight limiting assembly (218) comprises a support (2181) fixedly mounted on the beam frame (102), a travel switch (2182) fixedly mounted on the support (2181), and a bump block (2183) mounted on the lower weight (2022), wherein when the cursor weight assembly (202) moves, the travel of the cursor weight assembly (202) is detected by contacting with the travel switch (2182).
6. The fully automatic weight loading mechanical creep testing machine according to claim 1, wherein the sample fixture (3) comprises: the device comprises an upper pull rod (301) connected to the force point hanger, a universal joint upper sleeve (302) arranged at the lower end of the upper pull rod (301), a first universal joint rod (303) connected to the lower end of the universal joint upper sleeve (302), a first positioning sleeve (304) sleeved on the universal joint upper sleeve (302), a connecting rod (305) connected to the lower end of the first universal joint rod (303) and a chuck (306) connected to the lower end of the connecting rod (305); the device further comprises a second universal joint rod (307), a universal joint lower sleeve (308) connected to the lower end of the second universal joint rod (307) and a second positioning sleeve (309) sleeved on the second universal joint rod (307); a sample is connected to the collet (306) and the second gimbal rod (307).
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| CN202410580521.2A CN118150318B (en) | 2024-05-11 | 2024-05-11 | Full-automatic weight loading mechanical creep testing machine |
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| CN202410580521.2A CN118150318B (en) | 2024-05-11 | 2024-05-11 | Full-automatic weight loading mechanical creep testing machine |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519800A (en) * | 2011-11-18 | 2012-06-27 | 中国航空工业集团公司北京航空材料研究院 | Mechanical creep and permanent strength testing machine |
| CN103234836A (en) * | 2013-05-15 | 2013-08-07 | 中国航空动力机械研究所 | Flash ranging loading device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0687040B2 (en) * | 1989-04-10 | 1994-11-02 | 株式会社巴技研 | Elongation follower for tensile creep rupture tester |
| CN113959550B (en) * | 2021-09-28 | 2023-05-23 | 无锡市检验检测认证研究院 | Unequal arm balance loading unit, ground balance verification device and ground balance verification method |
| CN219641467U (en) * | 2023-05-11 | 2023-09-05 | 中机试验装备股份有限公司 | Six-head mechanical creep testing machine |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519800A (en) * | 2011-11-18 | 2012-06-27 | 中国航空工业集团公司北京航空材料研究院 | Mechanical creep and permanent strength testing machine |
| CN103234836A (en) * | 2013-05-15 | 2013-08-07 | 中国航空动力机械研究所 | Flash ranging loading device |
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