CN107702989B - Horizontal straight line fatigue testing machine - Google Patents
Horizontal straight line fatigue testing machine Download PDFInfo
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- CN107702989B CN107702989B CN201710906574.9A CN201710906574A CN107702989B CN 107702989 B CN107702989 B CN 107702989B CN 201710906574 A CN201710906574 A CN 201710906574A CN 107702989 B CN107702989 B CN 107702989B
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- cross beam
- cabinet
- ball socket
- testing machine
- base plate
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 32
- 238000006073 displacement reaction Methods 0.000 claims abstract description 11
- 239000006059 cover glass Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 21
- 238000009434 installation Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A horizontal linear fatigue testing machine comprises a cabinet, wherein the top surface of the cabinet is of an openable structure; the base plate and the frame structure are arranged at the upper part in the cabinet; the two pairs of guide rails and the sliding blocks are respectively arranged on the side frames at the two sides of the base plate frame; the two sides of the bottom surface of the cross beam are connected with the upper end surface of the sliding block, a plurality of through holes are arranged at intervals on the cross beam, and a ball socket supporting plate is arranged in the cabinet; the screw rod and the upper nut thereof are arranged at the center of the base plate, and the two ends of the screw rod are connected with the centers of the front frame and the rear frame of the base plate through the support; the nut is arranged in the center of the bottom surface of the cross beam; the servo motor is arranged on the outer side of the center of the front frame of the base plate and is connected with the screw rod; the driving devices are arranged in one-to-one correspondence with the through holes of the cross beam, the front end face of the cylinder body is connected with one side face of the through hole of the cross beam, the output end of each driving device penetrates through the through hole of the cross beam, and the end part of each output end is provided with a ball socket block; the force sensor is arranged on the ball socket supporting plate; the linear displacement sensor is arranged on one side of the inner side wall of the cabinet; and a controller. The invention can test the fatigue performance of a plurality of electric supporting rods with different types at the same time.
Description
Technical Field
The invention relates to automobile part testing equipment, in particular to a horizontal linear fatigue testing machine.
Background
The electric stay bar is controlled by a built-in motor and is used for supporting an automatic opening and closing device of an automobile tail door. The fatigue characteristics of the electric stay bar are very slow when the automobile tail gate is directly tested.
At present, a plurality of fatigue testing machines can be used for testing fatigue characteristics, fatigue life, pre-cracking and crack propagation of stretching, compression or tension-compression alternating loads of metal, alloy materials and components thereof (such as an operation joint, a fixed connection part, a spiral movement part and the like) at room temperature, and the universal fatigue testing machine can be used for replacing different clamps to complete the fatigue test of an independent electric stay rod.
The existing universal fatigue testing machine can test the fatigue characteristic of one electric stay bar, but the test cost is very high when testing a plurality of electric stay bars, different types and lengths of different electric stay bars lead to different clamps, and the cost is increased.
Disclosure of Invention
The invention aims to design a horizontal linear fatigue testing machine, which is specially used for testing the linear fatigue of electric supporting rods and can simultaneously test the fatigue performance of a plurality of electric supporting rods with different types.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
A horizontal linear fatigue testing machine comprises a cabinet, wherein the top surface of the cabinet is of an openable structure; the base plate is arranged at the upper part in the cabinet and is of a frame structure; the two pairs of guide rails and the sliding blocks are respectively arranged on the upper end surfaces of the side frames on the two sides of the substrate frame; the two sides of the bottom surface of the cross beam are connected with the upper end surface of the sliding block, a plurality of through holes are formed in the cross beam along the length direction at intervals, a ball socket supporting plate for fixing a plurality of electric stay bar joints in a ball socket is arranged in the cabinet, and the ball socket supporting plate is opposite to and parallel to the cross beam; the screw rod and the upper nut thereof are arranged in the center of the base plate and parallel to the guide rail, and the two ends of the screw rod are connected with the centers of the front frame and the rear frame of the base plate through the support; the nut is arranged in the center of the bottom surface of the cross beam; the servo motor is arranged on the outer side of the center of the front frame of the base plate through a mounting plate, the output end of the servo motor is connected with the screw rod, and the servo motor drives the cross beam to move back and forth through the cooperation of the screw rod and the nut; the driving devices are arranged in one-to-one correspondence with the through holes of the cross beam, the front end face of the cylinder body of each driving device is connected with one side face of the through hole of the cross beam, the output ends of the driving devices penetrate through the through holes of the cross beam, and ball socket blocks for fixing ball sockets of the joints of the power supply stay bars are arranged at the end parts of the output ends; the force sensor is arranged on the ball socket supporting plate; the linear displacement sensor is arranged on one side of the inner side wall of the cabinet and corresponds to the movement stroke of the cross beam; and the servo motor, the driving device, the force sensor and the linear displacement sensor are all electrically connected with the controller.
Preferably, the driving device is an electric cylinder, a hydraulic cylinder or an air cylinder.
And the ball socket fixing part of the ball socket supporting plate corresponding to the electric stay bar joint is provided with an adjusting gasket, and electric stay bars of different types are tested simultaneously by adjusting the thickness of the gasket.
Preferably, the cabinet is provided with four rollers at the straight bottom, so that the cabinet can be conveniently moved to different positions in a workshop.
Preferably, a touch screen display connected with the controller is arranged on the cabinet, so that parameters can be conveniently input and test results can be directly observed.
Preferably, the openable protective glass cover is arranged on the top surface of the cabinet, so that the testing condition of the electric stay bar can be conveniently checked.
Compared with the existing fatigue testing machine, the invention has the advantages that:
the invention can test a plurality of electric supporting rods simultaneously, and the universal fatigue testing machine can test only one electric supporting rod.
The invention relates to a horizontal type electric stay bar, which is vertically arranged, and a universal fatigue testing machine can be used for simultaneously testing gravity.
The universal fatigue testing machine is a vertical type installation electric stay bar, the influence of gravity on deformation of the slender rod can be ignored in the vertical type installation, and the influence of gravity on the fatigue test of the electric stay bar can be considered in the horizontal type installation electric stay bar.
The conventional universal fatigue testing machine is generally driven by a hydraulic cylinder or an air cylinder, the electric cylinder is driven by the electric cylinder, the electric cylinder works in a complex environment only by injecting grease regularly, no vulnerable part is required to be maintained and replaced, and a large amount of after-sale service cost is reduced compared with a hydraulic system and an air pressure system.
The linear fatigue testing machine can verify that the electric stay bar is stressed by the electric cylinder under the premise of not electrifying, and the spring force in the electric stay bar is used for completing reciprocating telescopic movement, so that the fatigue characteristics of the plastic reduction gearbox in the electric stay bar are tested.
The device for testing the fatigue performance and the fatigue life of the electric stay bar under the normal temperature condition can be used for rapidly testing, the electric stay bar supporting the automatic opening and closing of the automobile tail door can continuously reciprocate for 50000 times to test the fatigue performance of the electric stay bar in the fatigue testing machine, then the fatigue life of the electric stay bar can be continuously tested by reciprocating the electric stay bar, the crack position of the fatigue failure of the electric stay bar can be predicted, and a reference is provided for the optimal design of the electric stay bar.
The invention can collect the fatigue characteristics of the electric stay bar and the force value attenuation, strength and straightness change condition in the fatigue test process of the electric stay bar.
Drawings
Fig. 1 is a perspective view of an embodiment of the present invention.
Fig. 2 is a top view of an embodiment of the present invention.
Fig. 3 is a top view of electrical braces, beams, and the like in an embodiment of the present invention.
Fig. 4 is a bottom view of fig. 3.
Detailed Description
Referring to fig. 1 to 4, the horizontal type linear fatigue testing machine of the present invention includes,
The top surface of the cabinet 1 is of an openable structure;
The base plate 2 is arranged at the upper part in the cabinet 1, and the base plate 2 is of a frame structure;
the two pairs of guide rails 3 and 3 'and the sliding blocks 4 and 4' are respectively arranged on the upper end surfaces of the frames at the two sides of the base plate 2;
The two sides of the bottom surface of the cross beam 5 are connected with the upper end surfaces of the sliding blocks 4 and 4', a plurality of through holes are formed in the cross beam 5 along the length direction at intervals, a ball socket supporting plate 6 for fixing ball sockets of a plurality of electric supporting rods 100 is arranged in the cabinet 1, and the ball socket supporting plate 6 is opposite to and parallel to the cross beam 5;
The screw rod 7 and the upper nut thereof, the screw rod 7 is arranged in the center of the base plate 2 and parallel to the guide rails 3 and 3', and two ends of the screw rod 7 are connected with the centers of the front frame and the rear frame of the base plate 2 through the supports 8 and 8'; the nut is arranged in the center of the bottom surface of the cross beam;
the servo motor 9 is arranged on the outer side of the center of the front frame of the base plate 2 through a mounting plate, the output end of the servo motor is connected with the screw rod 7, and the servo motor drives the cross beam to move back and forth through the cooperation of the screw rod and a nut;
The driving devices 10 and 10' are arranged in one-to-one correspondence with the through holes of the cross beam 5, the front end surface of the cylinder body of the driving device is connected with one side surface of the through hole of the cross beam 5, the output end of the driving device 10 passes through the through hole of the cross beam 5, and the end part of the output end is provided with a ball socket block 11 for fixing the ball socket of the joint of the power supply stay rod 100;
A force sensor 12 provided on the ball socket support plate 6;
the linear displacement sensor 13 is arranged on one side of the inner side wall of the cabinet 1 and corresponds to the movement stroke of the cross beam 5;
and the servo motor, the driving device, the force sensor and the linear displacement sensor are all electrically connected with the controller.
Preferably, the driving device 10 is an electric cylinder, a hydraulic cylinder or an air cylinder.
Preferably, the ball socket support plate 6 is provided with an adjusting pad 14 corresponding to the ball socket fixing position of the joint of the electric stay bar 100.
Preferably, four rollers 15 are provided at the bottom of the cabinet 1, and a touch screen display 16 connected to the controller is provided on the top surface of the cabinet 1.
Preferably, an openable cover glass is provided on the top surface of the cabinet 1.
The control flow of the linear fatigue testing machine comprises the following steps:
1) Setting parameters including the numbers of the electric stay bars A-F to be tested, the test times, the pulse frequency and the distance, and then starting;
2) The distance parameter is sent to a servo motor for driving the cross beam 8 to move through a PLC controller;
3) The servo motor starts to work, namely the beam is driven to move;
4) Judging whether the set distance value is reached or not according to the data fed back by the displacement sensor, if so, turning to the step 5, and if not, turning to the step 3;
5) The quantity of the adjusting gaskets is manually installed, and the electric stay bars are installed according to the numbers A to F;
6) The serial numbers A-F and the pulse frequency parameters are sent to the stepping motors of the electric cylinders through the PLC controller, so that the stepping motors drive the respective electric cylinders to move;
7) Judging whether the test times are reached or not according to the frequency parameters, if so, turning to the step 8, and if not, turning to the step 6;
8) Sending a stop signal to the stepping motor, and ending the test;
9) And outputting a result report which comprises data such as force and displacement curves.
When the linear fatigue testing machine works, the linear fatigue testing machine is driven to move left and right by the servo motor driving the cross beam to move, the installation space of the electric brace rod is adjusted, and the electric brace rods with different types can be installed at the positions of the serial numbers A to F by changing the number of the adjusting gaskets. When the fatigue test is loaded, the PLC control system sends an instruction to the stepping motors which are connected in parallel and correspond to the serial numbers A-F and drive the electric cylinders to work, so that the electric cylinders move linearly, pressure is loaded on the electric stay bars, and the fatigue test of inputting test times is completed. The end of the test may output the corresponding force and displacement curve results.
When the electric stay bars of different types need to be tested, the reserved space takes the length of the longest electric stay bar as the distance value input by the display, and the mounting distance of the smallest electric stay bar is adjusted by using the adjusting gasket, such as the mounting form of the electric stay bar at the position of the number F in fig. 3 after being adjusted by using the gasket, and the electric stay bar is mounted between the ball socket support plate and the ball socket block. The working principle of screw rod driving is that after the servo motor receives the signal of the PLC controller, the screw rod is driven to rotate, the movement drives the cross beam provided with the screw rod nut to move on the guide rail, and the data collected by the displacement sensor moves the cross beam to the signal appointed position of the PLC controller.
In this embodiment, the driving device of the present invention employs an electric cylinder and a stepping motor. The electric cylinder is a closed-loop control system, the control precision is high, the thrust is precisely controlled, the pressure sensor is increased, the control precision is high, and the electric cylinder is easily connected with a PLC (programmable logic controller) and other control systems to realize high-precision motion control. Low noise, energy saving, clean, high rigidity, impact resistance, long service life and simple operation and maintenance. The electric cylinder can be free from faults in a severe environment, and the protection level can reach IP66. The stepping motor of the electric cylinder outputs signals through the PLC to control the pulse frequency, so that the reciprocating expansion speed and the expansion times of the electric stay bars are controlled.
The linear fatigue testing machine can verify that the electric stay bar applies pressure through the electric cylinder on the premise that the electric stay bar is not electrified, and the spring force in the electric stay bar is used for completing reciprocating telescopic movement, so that the fatigue characteristics of the plastic reduction gearbox in the electric stay bar are tested.
Claims (6)
1. A horizontal linear fatigue testing machine is characterized by comprising,
The top surface of the cabinet is of an openable structure;
the base plate is arranged at the upper part in the cabinet and is of a frame structure;
The two pairs of guide rails and the sliding blocks are respectively arranged on the upper end surfaces of the side frames on the two sides of the substrate frame;
the two sides of the bottom surface of the cross beam are connected with the upper end surface of the sliding block, a plurality of through holes are formed in the cross beam along the length direction at intervals, a ball socket supporting plate for fixing a plurality of electric stay bar joints in a ball socket is arranged in the cabinet, and the ball socket supporting plate is opposite to and parallel to the cross beam; an adjusting gasket is arranged at the ball socket fixing position of the ball socket supporting plate corresponding to the electric stay bar joint;
The screw rod and the upper nut thereof are arranged in the center of the base plate and parallel to the guide rail, and the two ends of the screw rod are connected with the centers of the front frame and the rear frame of the base plate through the support; the nut is arranged in the center of the bottom surface of the cross beam;
the servo motor is arranged on the outer side of the center of the front frame of the base plate through a mounting plate, the output end of the servo motor is connected with the screw rod, and the servo motor drives the cross beam to move back and forth through the cooperation of the screw rod and the nut;
The driving devices are arranged in one-to-one correspondence with the through holes of the cross beam, the front end face of the cylinder body of each driving device is connected with one side face of the through hole of the cross beam, the output ends of the driving devices penetrate through the through holes of the cross beam, and ball socket blocks for fixing ball sockets of the joints of the power supply stay bars are arranged at the end parts of the output ends;
The force sensor is arranged on the ball socket supporting plate;
The linear displacement sensor is arranged on one side of the inner side wall of the cabinet and corresponds to the movement stroke of the cross beam;
and the servo motor, the driving device, the force sensor and the linear displacement sensor are all electrically connected with the controller.
2. The horizontal linear fatigue testing machine according to claim 1, wherein the driving device is an electric cylinder, a hydraulic cylinder or an air cylinder.
3. The horizontal linear fatigue testing machine according to claim 1, wherein the cabinet has four rollers at the bottom.
4. The horizontal linear fatigue testing machine according to claim 1 or 3, wherein a touch screen display connected with the controller is arranged on the cabinet.
5. The horizontal linear fatigue testing machine according to claim 1 or 3, wherein the top surface of the cabinet is provided with an openable cover glass.
6. The horizontal linear fatigue testing machine according to claim 4, wherein the top surface of the cabinet is provided with an openable cover glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710906574.9A CN107702989B (en) | 2017-09-29 | 2017-09-29 | Horizontal straight line fatigue testing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710906574.9A CN107702989B (en) | 2017-09-29 | 2017-09-29 | Horizontal straight line fatigue testing machine |
Publications (2)
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| CN107702989A CN107702989A (en) | 2018-02-16 |
| CN107702989B true CN107702989B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710906574.9A Active CN107702989B (en) | 2017-09-29 | 2017-09-29 | Horizontal straight line fatigue testing machine |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108345756B (en) * | 2018-03-07 | 2021-07-13 | 北京顺恒达汽车电子股份有限公司 | Method and device for optimizing design under existing automobile tail door electric stay bar system |
| CN108535108A (en) * | 2018-04-03 | 2018-09-14 | 苏州拓博机械设备有限公司 | A kind of multigroup grid cell piece horizontal tensile testing machine |
| CN108318240A (en) * | 2018-04-11 | 2018-07-24 | 中国电子科技集团公司第十六研究所 | A kind of spring fatigue test device |
| CN108982262A (en) * | 2018-07-10 | 2018-12-11 | 株洲时代新材料科技股份有限公司 | A kind of rubber material multichannel fatigue experimental device and method |
| CN110018040A (en) * | 2019-04-03 | 2019-07-16 | 钢研纳克检测技术股份有限公司 | A kind of tiny sample mechanical property high throughput test macro and method |
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| CN107702989A (en) | 2018-02-16 |
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