CN102519800A - Mechanical creep and permanent strength testing machine - Google Patents
Mechanical creep and permanent strength testing machine Download PDFInfo
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- CN102519800A CN102519800A CN2011103749742A CN201110374974A CN102519800A CN 102519800 A CN102519800 A CN 102519800A CN 2011103749742 A CN2011103749742 A CN 2011103749742A CN 201110374974 A CN201110374974 A CN 201110374974A CN 102519800 A CN102519800 A CN 102519800A
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Abstract
The invention relates to a mechanical creep and permanent strength testing machine. Through increasing the coaxality of a hearth of a heating furnace and a stress application pull rod system and reducing the influences of a lateral shearing force on a loading sample, the loading sample is located at the center of a uniform temperature zone of the heating furnace, thereby, the temperature stability during the testing process is ensured. According to the testing machine, a loading weight is designed on the stress application pull rod system to monitor a force sensor, and the testing force of the loading weight is monitored in real time, thereby, a tester can process testing errors and the faults of the testing machine in time according to an alarm prompt, and the loading sample and testing equipment are effectively ensured to be safe. According to the testing machine, the heating furnace can be kept stable at the horizontal position of a stand during the testing process, thereby, the loading testing force is ensured to be constant during the testing process.
Description
Technical field
The present invention is creep in a kind of mechanical type, permanent strength testing machine, belongs to the technical field of structures of product.
Background technology
Creep, creep rupture test are a kind of high temperature tension tests that under the steady temperature permanent load, carries out, and creep, permanent strength testing machine are the special purpose test equipments that metal material carries out high temperature enduring quality test when long.Creep, permanent strength testing machine are classified according to the load mode of test power, mainly contain two types, and a kind of is mechanical type creep, permanent strength testing machine, mainly load counterweight through lever and come sample is applied test power; A kind of is the creep of system controlled by computer electronic type, permanent strength testing machine, through PID closed-loop control force transducer, by force transducer sample is applied test power.The accuracy of mechanical type creep, permanent strength testing machine load test power; Relying on the laboratory technician to set the counterweight value fully guarantees; Be easy to influence the true and reliable property of test figure, and be generally 1 year the power value calibration interval of testing machine because the artificial origin causes loading the counterweight mistake; In process of the test if test power takes place when unusual in the mechanical system errors increase; Because of the counterweight quantity that loads does not change, laboratory technician's phenomenon that can not in time note abnormalities will impact accuracy of experimental results; The force transducer of the creep of system controlled by computer electronic type, permanent strength testing machine is easy to receive stability, the reliability of factor affecting load test power such as zero point drift of interference and the electric elements of testing machine heating furnace electromagnetic field; Reach several thousand for some test durations; Even creep during several ten thousand hours long, creep rupture test, if run into long power failure in the process of the test, loading motor quits work; Force controller will be out of hand to the test power that sample loads; It is constant that test power is difficult to keep, because the effect of expanding with heat and contract with cold is easy to cause cold disconnected the scrapping of sample; Especially creep test in case test power takes place unusually in the process of the test, will have a strong impact on creep data and makes test findings invalid.The creep, the permanent strength testing machine heating furnace that use both at home and abroad now generally all are designed to the opposite opened heating furnace; Heating furnace generally is fixed on the fixed position of mainframe; For the sample of different size, the center, soaking zone of heating furnace is difficult to all registration coupon centers, causes the fluctuation of test temperature gradient and test temperature field easily; Influence the stability of test temperature; And the opposite opened heating furnace is relatively poor in frame horizontal level fixation stability property, can not well guarantee the alignment of the afterburning tie system of heating furnace burner hearth and testing machine, thereby load test power is impacted.
Summary of the invention
The present invention designs to the shortcoming that exists in the above-mentioned existing apparatus just creep in a kind of mechanical type, permanent strength testing machine is provided; Its objective is through design electric/manual up-down cartridge type push-pull configuration heating furnace; Improve the stability of installation sample heating-up temperature; Improve the alignment of afterburner system, reduce loading the influence that sample receives cross shear, guarantee authenticity, the reliability of test figure;
Load the counterweight force transducer in afterburning tie system design, monitor load test power in real time, improve the accuracy of load test power in the entire test;
In afterburning lever both sides a photoswitc is installed respectively, is made heating furnace keep stable, guarantee that process of the test load test power is constant at the frame horizontal level.
The objective of the invention is to realize through following technical scheme:
Creep in a kind of mechanical type of this kind, permanent strength testing machine is characterized in that:
(1) this testing machine comprises electric up-down motor, wire rope, mainframe pillar, heating furnace, manual control box guidance panel; Hand-cranking engine, hand-operated lifting handle and wire rope twine spool; Two wire rope bolts are in the wire-rope sling of heating furnace upper surface; On wire rope twined spool, wire rope twined spool through the rotation of electric up-down driven by motor through suspended, and the center of heating furnace has the heating furnace perforate to pass test to use afterburning pull bar;
Heating furnace adopts the shaft-type furnace structure; The heating furnace alignment location-plate of two same sizes is fixed in two end faces up and down of heating furnace through screw with screw; The dual-side of every heating furnace alignment location-plate has a heating furnace location gap; The heating furnace location gap of two heating furnace alignment location-plates is sandwiched on the mainframe pillar, on the contact position of heating furnace location gap and mainframe pillar rolling bearing is installed;
The hand-operated lifting handle drives the alternative electric up-down motor in hand-cranking engine generating back heating furnace is carried out descending operation.
On heating furnace, be installed in the centering pointer, on the mainframe pillar, be carved with heating furnace lifting travel scale, the height and position at sample center in the sensing calibration summary heating furnace of middle pointer on heating furnace lifting travel scale.
(2) one of the end of afterburning pull bar polyphone is used to monitor the force transducer that loads counterweight under testing machine, and force transducer is realized being electrically connected with the test power numerical value that shows and the record force transducer bears with testing machine manual control box guidance panel and PLC Programmable Logic Controller;
(3) in the both sides of the afterburning lever of testing machine the horizontal offset that a photoswitc is used to monitor afterburning lever is installed respectively; Afterburning lever the below alarm switch that is used to monitor sample fracture is installed, motor is connected with the afterburning lever of top through afterburning pull bar and drives its rotation and adjust the horizontal level of afterburning lever.
Advantage of the present invention is:
1. be the alignment of effectively guaranteeing heating furnace burner hearth and afterburning tie system; Reduce and load the influence that sample receives cross shear; The up-down of heating furnace has electric up-down and hand-operated lifting dual mode; Normal test operation can be used the electric up-down mode, and during unexpected the power failure, available hand-operated lifting mode is operated heating furnace; Design heating furnace lifting travel scale on the testing machine mainframe, installation position, sample center, location when falling heating furnace, makes the installation sample be in the center, soaking zone of heating furnace, guarantees the stability of the temperature of process of the test.
2. this testing machine is through loading counterweight monitoring force sensor in afterburning tie system design; Monitoring in real time loads the test power of counterweight; And monitoring test power is sent to ipc monitor computer system real-time storage, design sound and light alarm lamp carries out safety protection control through the PLC Programmable Logic Controller to installation sample and testing machine in real time; When load test power is made mistakes, when sample fracture or testing machine fault; The sound and light alarm lamp sends the sound and light alarm prompting simultaneously, and the laboratory technician can effectively protect the safety of installation sample and testing equipment according to timely Processing Test mistake of alarm and testing machine fault.
3. this testing machine can make heating furnace keep stable at the frame horizontal level in process of the test, guarantees that process of the test load test power is constant.
Description of drawings
Fig. 1 is the one-piece construction synoptic diagram of testing machine of the present invention
Fig. 2 is the shape and structure synoptic diagram of the heating furnace alignment location-plate of testing machine of the present invention
Fig. 3 is the upward view of Fig. 2
Fig. 4 is the side view of testing machine of the present invention
Embodiment
Below will combine accompanying drawing and embodiment that apparatus of the present invention are done to detail further:
Shown in accompanying drawing 1～3; This testing machine comprises electric up-down motor 1, wire rope 2, mainframe pillar 3, heating furnace 6, manual control box guidance panel 6; Hand-cranking engine 7, hand-operated lifting handle 8 and wire rope twine spool 9; Two wire rope 2 bolts are in the wire-rope sling 4 of heating furnace 6 upper surfaces; Hang on wire rope through pulley 13 and twine on the spool 9, wire rope twines spool 9 through electric up-down motor 1 driven rotary, and the center of heating furnace 6 has heating furnace perforate 17 to pass test with afterburning pull bar 18;
Hand-operated lifting handle 8 drives 1 pair of heating furnace of the hand-cranking engine 7 generating alternative electric up-down motors in back 5 and carries out descending operation.
On heating furnace 6, be installed in centering pointer 11, on mainframe pillar 3, be carved with heating furnace lifting travel scale 12, the height and position at sample center in the sensing calibration summary heating furnace 6 of middle pointer 11 on heating furnace lifting travel scale 12.
In process of the test; On manual control box guidance panel 6, can start electric up-down motor 1 up-down heating furnace 5 by heating furnace 5 lifting buttons; In falling the process of heating furnace, when the heating furnace alignment location-plate 10 of heating furnace 5 lower surfaces drops to the center of clamping sample, note the height and position at sample center according to the heating furnace lifting travel scale 12 on the mainframe pillar; Continue to fall heating furnace 5 then; Until heating furnace centering pointer 11 and at the height and position at the sample center of heating furnace lifting travel scale 12 record at once getting final product, guarantee that sample is in the center, soaking zone of heating furnace, the stability of test temperature in the assurance entire test.When having a power failure, shake hand-operated lifting handle 8 and drive the descending operation that hand-cranking engine 7 generating back drive electric up-down motors 1 carry out heating furnace 5 when meeting accident.
Shown in accompanying drawing 4; One of end polyphone at the afterburning pull bar 18 of testing machine is used to monitor the force transducer 20 that loads counterweight 19, and force transducer 20 is realized being electrically connected with the test power numerical value that shows and record force transducer 2 bears with testing machine manual control box guidance panel 6 and PLC Programmable Logic Controller 21;
During test; Placement needs the counterweight 19 of loading on weight tray 26, after setting the positive and negative deviation undulating quantity of loaded targets power value and permission on the manual control box guidance panel 6, on manual control box guidance panel 6, presses and loads key; PLC Programmable Logic Controller 21 sends load instructions for motor 25; Motor 25 starts drive turbine leading screw and moves downward the tension sample, sample is born load counterweight power, in loading procedure, loads the test power that counterweight monitoring force sensor 20 real-time monitoring samples bear; And on the LED display of manual control box guidance panel 1, show in real time load test power; And load test power is sent to the ipc monitor computer system stores in real time, when the counterweight power value of actual loaded surpassed the scope of the deviation undulating quantity that target setting test power allows, sound and light alarm lamp and supervisory computer system were sent alarm simultaneously; The laboratory technician can in time end test operation, effectively prevents to load to make mistakes;
(3) in the both sides of the afterburning lever 22 of testing machine the horizontal offset that a photoswitc 23 is used to monitor afterburning lever 22 is installed respectively; Afterburning lever 22 the below alarm switch 24 that is used to monitor sample fracture is installed, motor 25 is connected with the afterburning lever 22 of top through afterburning pull bar 18 and drives its rotation and adjust the horizontal level of afterburning lever 22.
During work; The afterburning lever 22 of optoelectronic switch 23 monitoring that install the afterburning lever 22 afterburning end left and right sides departs from the side-play amount of level; A disconnected appearance alarm switch 24 is installed in the below of the reinforcing end of afterburning lever 22; Motor 25 connects a pluggable wind 27, after loading counterweight 19 on the weight tray 26, starts the automatic levelling function of afterburning lever at manual control box guidance panel 6 in the process of the test; Whether the automatic in real time monitoring lever 22 of optoelectronic switch 23 of the afterburning lever 22 afterburning end left and right sides is horizontal; When afterburning lever 22 was higher or lower than horizontal level, the afterburning lever 22 of optoelectronic switch 23 feedbacks departed from the horizontal level signal to PLC Programmable Logic Controller 21, and PLC Programmable Logic Controller 21 regulates afterburning lever 22 for motor 25 instructions automatically; Afterburning lever 22 is horizontal in process of the test in real time, guarantees that test is constant in the entire test.
Meet accident in the process of the test when having a power failure; Creep test method regulation process of the test has a power failure and can not unload, and afterburning lever 22 departs from horizontal level because of shrinkage makes as if unexpected power failure sample, and the actual pulling force that bears of sample will constantly increase; Do not broken for guaranteeing sample by shrinkage; Can drive motor 25 adjustment (adjusting) levers 22 through manual leveling wind 27 and keep horizontal level, the test power that sample is born is constant, guarantees that sample is not broken because of the sample shrinkage.
Compared with prior art, testing machine of the present invention have specifically that automaticity is high, data accurately and reliably, easy to operate advantage.
Claims (2)
1. creep in the mechanical type, permanent strength testing machine is characterized in that:
(1) this testing machine comprises electric up-down motor (1), wire rope (2), mainframe pillar (3), heating furnace (6), manual control box guidance panel (6); Hand-cranking engine (7), hand-operated lifting handle (8) and wire rope twine spool (9); Two wire rope (2) bolt is in the wire-rope sling (4) of heating furnace (6) upper surface; Hanging on wire rope through pulley (13) twines on the spool (9); Wire rope twines spool (9) through electric up-down motor (1) driven rotary, and the center of heating furnace (6) has heating furnace perforate (17) to pass test with afterburning pull bar (18);
Heating furnace (5) adopts the shaft-type furnace structure; The heating furnace alignment location-plate (10) of two same sizes is fixed in two end faces up and down of heating furnace (5) through screw (16) with screw; The dual-side of every heating furnace alignment location-plate (10) has a heating furnace location gap (14); The heating furnace location gap (14) of two heating furnace alignment location-plates (10) is sandwiched on the mainframe pillar (3), on the contact position of heating furnace location gap (14) and mainframe pillar (3) rolling bearing (15) is installed;
Hand-operated lifting handle (8) drives hand-cranking engine (7) the generating alternative electric up-down motor in back (1) heating furnace (5) is carried out descending operation;
(2) one of the end of afterburning pull bar (18) polyphone is used for the force transducer (20) that monitoring loads counterweight (19) under testing machine, and force transducer (20) is realized being electrically connected with the test power numerical value that shows and record force transducer (2) bears with testing machine manual control box guidance panel (6) and PLC Programmable Logic Controller (21);
(3) in the both sides of the afterburning lever of testing machine (22) horizontal offset that a photoswitc (23) is used to monitor afterburning lever (22) is installed respectively; Afterburning lever (22) the below alarm switch (24) that is used to monitor sample fracture is installed, motor (25) is connected with the afterburning lever (22) of top through afterburning pull bar (18) and drives its rotation and adjust the horizontal level of afterburning lever (22).
2. creep in the mechanical type according to claim 1, permanent strength testing machine; It is characterized in that: on heating furnace (6), be installed in centering pointer (11); On mainframe pillar (3), be carved with heating furnace lifting travel scale (12), the height and position at sample center in the sensing calibration summary heating furnace (6) of middle pointer (11) on heating furnace lifting travel scale (12).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110374974 CN102519800B (en) | 2011-11-18 | 2011-11-18 | Mechanical creep and permanent strength testing machine |
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| CN 201110374974 CN102519800B (en) | 2011-11-18 | 2011-11-18 | Mechanical creep and permanent strength testing machine |
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| CN102519800A true CN102519800A (en) | 2012-06-27 |
| CN102519800B CN102519800B (en) | 2013-10-16 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616297A (en) * | 2013-12-06 | 2014-03-05 | 山东玉玺仪器有限公司 | High-temperature endurance testing machine and method for improving testing accuracy |
| CN104807700A (en) * | 2014-08-18 | 2015-07-29 | 海盐国检检测技术有限公司 | Stress corrosion testing machine |
| CN105136565A (en) * | 2015-09-18 | 2015-12-09 | 吉林大学 | Off-line type loading method for weather resistance test of bonding adapter |
| CN106124315A (en) * | 2016-06-15 | 2016-11-16 | 中国航空工业集团公司北京航空材料研究院 | A kind of little tonnage creep/permanent strength testing machine |
| CN108072567A (en) * | 2017-12-08 | 2018-05-25 | 广州特种承压设备检测研究院 | A kind of plastics constant temperature stress etching experiment device and method |
| CN109269908A (en) * | 2018-10-22 | 2019-01-25 | 世联汽车内饰（苏州）有限公司 | A kind of synthetic leather stretches and peel test equipment and test method |
| CN109540676A (en) * | 2019-01-05 | 2019-03-29 | 北京交通大学 | It is a kind of using servo loading, the soft rock single shaft creepmeter of mechanical pressure stabilizing |
| CN110174251A (en) * | 2019-05-07 | 2019-08-27 | 上海第一机床厂有限公司 | A kind of experimental rig of disc spring damper |
| CN110926928A (en) * | 2019-12-06 | 2020-03-27 | 北京交通大学 | Automatic remote alarm device for constant-load tensile test |
| CN112945752A (en) * | 2021-02-05 | 2021-06-11 | 宁夏大学 | Device for testing high-temperature creep property of metal and testing method using device |
| CN113281192A (en) * | 2021-06-18 | 2021-08-20 | 中国船舶重工集团公司第七二五研究所 | Cold-hot alternating fatigue test method under constant stress |
| CN113804546A (en) * | 2021-11-18 | 2021-12-17 | 中国电器科学研究院股份有限公司 | Stress aging test device and method for carbon fiber reinforced composite material |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4535636A (en) * | 1984-03-19 | 1985-08-20 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Tensile testing apparatus |
| JPH01216227A (en) * | 1988-02-24 | 1989-08-30 | Toko Tesutatsuku:Kk | Weight load type creep testing machine |
| JPH0216227A (en) * | 1988-03-01 | 1990-01-19 | Morita Tokushu Kiko Kk | Suctional carry-out device for fine sediment from working water chamber to sludge room |
| JPH08152388A (en) * | 1994-11-30 | 1996-06-11 | Mitsubishi Heavy Ind Ltd | Ceramic creep rupture testing machine |
| CN1553162A (en) * | 2003-08-21 | 2004-12-08 | 株洲时代新材料科技股份有限公司 | Elastic element creep testing method and tester thereof |
| CN2784910Y (en) * | 2005-04-27 | 2006-05-31 | 深圳市新三思材料检测有限公司 | High temperature creep endurance testing machine with protector |
| CN201203473Y (en) * | 2008-06-03 | 2009-03-04 | 山东省计量科学研究院 | Dead weight / lever dual-purpose type force standard plane |
| CN201464300U (en) * | 2009-07-27 | 2010-05-12 | 洛阳市谱瑞慷达耐热测试设备有限公司 | High-temperature load soft creep tester for multiple samples |
-
2011
- 2011-11-18 CN CN 201110374974 patent/CN102519800B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4535636A (en) * | 1984-03-19 | 1985-08-20 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Tensile testing apparatus |
| JPH01216227A (en) * | 1988-02-24 | 1989-08-30 | Toko Tesutatsuku:Kk | Weight load type creep testing machine |
| JPH0216227A (en) * | 1988-03-01 | 1990-01-19 | Morita Tokushu Kiko Kk | Suctional carry-out device for fine sediment from working water chamber to sludge room |
| JPH08152388A (en) * | 1994-11-30 | 1996-06-11 | Mitsubishi Heavy Ind Ltd | Ceramic creep rupture testing machine |
| CN1553162A (en) * | 2003-08-21 | 2004-12-08 | 株洲时代新材料科技股份有限公司 | Elastic element creep testing method and tester thereof |
| CN2784910Y (en) * | 2005-04-27 | 2006-05-31 | 深圳市新三思材料检测有限公司 | High temperature creep endurance testing machine with protector |
| CN201203473Y (en) * | 2008-06-03 | 2009-03-04 | 山东省计量科学研究院 | Dead weight / lever dual-purpose type force standard plane |
| CN201464300U (en) * | 2009-07-27 | 2010-05-12 | 洛阳市谱瑞慷达耐热测试设备有限公司 | High-temperature load soft creep tester for multiple samples |
Non-Patent Citations (1)
| Title |
|---|
| 冯全，等: "一个高温持久/蠕变测控温及试验管理系统", 《材料工程》, no. 7, 31 July 2011 (2011-07-31) * |
Cited By (14)
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|---|---|---|---|---|
| CN103616297A (en) * | 2013-12-06 | 2014-03-05 | 山东玉玺仪器有限公司 | High-temperature endurance testing machine and method for improving testing accuracy |
| CN104807700A (en) * | 2014-08-18 | 2015-07-29 | 海盐国检检测技术有限公司 | Stress corrosion testing machine |
| CN105136565A (en) * | 2015-09-18 | 2015-12-09 | 吉林大学 | Off-line type loading method for weather resistance test of bonding adapter |
| CN105136565B (en) * | 2015-09-18 | 2017-06-27 | 吉林大学 | A kind of off-line type loading method of bonded joint weatherability experiment |
| CN106124315A (en) * | 2016-06-15 | 2016-11-16 | 中国航空工业集团公司北京航空材料研究院 | A kind of little tonnage creep/permanent strength testing machine |
| CN108072567A (en) * | 2017-12-08 | 2018-05-25 | 广州特种承压设备检测研究院 | A kind of plastics constant temperature stress etching experiment device and method |
| CN109269908A (en) * | 2018-10-22 | 2019-01-25 | 世联汽车内饰（苏州）有限公司 | A kind of synthetic leather stretches and peel test equipment and test method |
| CN109540676A (en) * | 2019-01-05 | 2019-03-29 | 北京交通大学 | It is a kind of using servo loading, the soft rock single shaft creepmeter of mechanical pressure stabilizing |
| CN109540676B (en) * | 2019-01-05 | 2023-12-12 | 北京交通大学 | Soft rock uniaxial creep gauge adopting servo loading and mechanical voltage stabilization |
| CN110174251A (en) * | 2019-05-07 | 2019-08-27 | 上海第一机床厂有限公司 | A kind of experimental rig of disc spring damper |
| CN110926928A (en) * | 2019-12-06 | 2020-03-27 | 北京交通大学 | Automatic remote alarm device for constant-load tensile test |
| CN112945752A (en) * | 2021-02-05 | 2021-06-11 | 宁夏大学 | Device for testing high-temperature creep property of metal and testing method using device |
| CN113281192A (en) * | 2021-06-18 | 2021-08-20 | 中国船舶重工集团公司第七二五研究所 | Cold-hot alternating fatigue test method under constant stress |
| CN113804546A (en) * | 2021-11-18 | 2021-12-17 | 中国电器科学研究院股份有限公司 | Stress aging test device and method for carbon fiber reinforced composite material |
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