CN2041842U - Material testing machine for teaching - Google Patents
Material testing machine for teaching Download PDFInfo
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- CN2041842U CN2041842U CN 88221220 CN88221220U CN2041842U CN 2041842 U CN2041842 U CN 2041842U CN 88221220 CN88221220 CN 88221220 CN 88221220 U CN88221220 U CN 88221220U CN 2041842 U CN2041842 U CN 2041842U
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- steel plate
- end steel
- testing machine
- entablature
- material testing
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a material testing machine for material mechanics teaching experiments. The utility model loads with an oil pressing hoisting jack, measures force with a force measuring spring assembly which is formed by that compression springs are side by side arranged, and cushions elasticity produced by the force measuring spring assembly when test specimens fracture with an oil pressing buffer. The utility model whose maximal pulling and pressing force is 40KN has the advantages of simple structure, light weight, small volume, low cost and easy use. The utility model can break a low carbon steel test rod with a 10-millimeter diameter and fracture a grey cast iron test specimen with an 8-millimetre cross section diameter. The display error of the load is smaller than 3%, and in the aspects of maximal load and experiment precision, the requirement of the teaching experiments can be met.
Description
Material Testing Machine is used in teaching, is to be used for the used a kind of Material Testing Machine of material mechanics experiment teaching, is used for measuring the mechanical performance parameter of material.
Present factory or R﹠D institution employed Material Testing Machine kind model is more, oil pressure arranged with machinery, these device structure complexity and body are heavy energetically, cost an arm and a leg, the big load education experiment of the mechanics of materials class of a lot of universities and colleges, special secondary school and skilled workers school is arranged, all on the employed universal testing machine of factory or R﹠D institution, carry out.Owing to cost an arm and a leg, utilization factor is low, and most schools can not be equipped with many for student's group experiment usefulness, and a lot of schools also do not have such equipment so far, make teaching effect be subjected to certain influence.
The purpose of this utility model be In view of the foregoing make a kind of simple in structure, volume is little, in light weight, cheap, again can be in the Material Testing Machine that can both reach the education experiment requirement aspect maximum load and the test accuracy.
Task of the present utility model is finished by following design proposal.Be the teaching material testing machine by sill (1), the rectangular frame that two root posts (2), entablature (10) constitute.Sill (1) is fixed on the base (30).Two sides are welded with four gussets (11) before and after the entablature (10), and gusset (11) goes up the plane and entablature (10) upward is same surface level in the plane.Entablature (10) is shaped on the circular hole that can supply pull bar (14) to be free to slide by two pull bars (14) spacing symmetry.The circular hole that two pull bars (14) pass entablature (10) becomes rectangular frame with back timber (19), worktable (5) bolt.Worktable (5) two ends become the semi-cylindrical slideway to cooperate with two columns (2) inboard, and its left end is fixed with connecting rod (6).Connecting rod (6) and load show, the respective rack of automatic drawing device (12) links to each other, tooth bar and be fixed on the coaxial gearing mesh of reel.The relative a pair of chuck (3) that is equipped with of sill (1) with worktable (5).Lay wedge (7) in the middle of above the worktable (5), in the middle of entablature (10) is following pressure head (9) is housed.Special character of the present utility model is between entablature (10) and back timber (19), and hydraulic jack (20), dynamometer spring group (27) and impact damper (15) are equipped with in two pull bars (14) inboard.
Dynamometer spring group (27) is made of side by side specification, several springs that performance is identical, and the upper and lower side of each spring is separately fixed on upper end steel plate (25) and the lower end steel plate (28).Lower end steel plate (28) is fixed on the gusset (11) of entablature (10) by central horizontal.
Hydraulic jack (20) is installed between entablature (10) and the back timber (19), the centre of two pull bars (14), and it is gone to the bottom and is horizontally fixed on above the upper end steel plate (25), and the adjustment screw rod of hydraulic jack (20) upper end is fixed on the back timber (19).
Impact damper (15) is installed on the upper end steel plate (25) of hydraulic jack (20) both sides symmetrically.Impact damper (15) mainly is made of fuel tank (21), oil cylinder (22), piston (23), retaining valve (24), poppet-valve bar (17), impact damper pull bar (16), bumper beam (18).Machine oil is equipped with in fuel tank (21) the inside, and oil cylinder (22) is fixed in the fuel tank (21), and piston (23) is in oil cylinder, and the upper end of piston rod is fixed on the bumper beam (18).Impact damper pull bar (16) passes upper end steel plate (25), and the upper end is fixed on the bumper beam (18), and the lower end is fixed on the lower end steel plate (28).Oil cylinder (22) bottom has supporting leg, prop up at fuel tank (21) at the end, make oil cylinder (22) end leave fuel tank (21) end certain distance, the centre at the end of oil cylinder (22) is shaped on valve opening, retaining valve (24) is housed on the valve opening, retaining valve (24) becomes circular conical surface to cooperate with valve opening, be shaped on the small breach of section on its circular conical surface.Stretch in fuel tank (21) lining poppet-valve bar (17) lower end, turn oil cylinder (22) end below can hold up the position of retaining valve (24), the upper end is exposed at the outer hook that has of fuel tank (21).
Dynamometry rack drives bar (13) right-hand member is fixed on the upper end steel plate (25), and left end and load show that the dynamometry tooth bar of automatic drawing device (12) links to each other.The left end that load shows, automatic drawing device (12) right-hand member is fixed on entablature (10).
The utility model is because employing hydraulic jack (20) is a power, can directly use manual manipulation, without electric power, maximum pressure is 40KN, and being enough to break cross-sectional diameter is that 10 millimeters mild carbon steel test specimens and pressure break cross-sectional diameter are 8 millimeters grey cast iron test specimen.Remove the stretching of doing material, outside the compression test,, can do the shearing of material again if be equipped with corresponding accessory, tests such as bending, this Material Testing Machine is applicable to mechanics of materials education experiment very much.Can simulate and produce and universal testing machine that scientific research is used is done the stretching of material, tests such as compression.The load display error is less than 3%, and is in light weight, volume is little, cost is low, will make each relevant school save breadboard investment like this, accelerates breadboard fundamental construction, cooperates teaching in time, improves the quality of teaching.
Following accompanying drawing has been described an embodiment of the present utility model:
Fig. 1 is that structure of the present utility model is always schemed.
1, sill 2, column 3, chuck 4, tensile test specimen 5, worktable 6, connecting rod 7, wedge 8, pressure limiting gasket ring 9, pressure head 10, entablature 11, gusset 12, load shows, automatic drawing device 13, dynamometry rack drives bar 14, pull bar 15, impact damper 16, impact damper pull bar 17, poppet-valve bar 18, bumper beam 19, back timber 20, hydraulic jack 21, fuel tank 22, oil cylinder 23, piston 24, retaining valve 25, upper end steel plate 26, limit for tonnage pad 27, dynamometer spring group 28, lower end steel plate 29, compression specimens 30, base
Accompanying drawing is an operational diagram of the present utility model.This material testing machine lifting capacity is that 10 tons hydraulic jack (20) loads, and uses dynamometer spring group (27) dynamometry of being made up of side by side 20 compression springs, the elastic force that dynamometer spring group (27) produces when breaking with oil buffer (15) buffering test specimen.Agent structure is by two root posts (2) and entablature (10), and sill (1) bolt becomes steelframe to form.
When hydraulic jack (20) loaded, jack-up back timber (19) drove worktable (5) by pull bar (14) and rises.If chuck (3) is equipped with tensile test specimen (4), then test specimen tension.If be placed with compression specimens (29) on the wedge (7), test specimen pressurized then, for making compression specimens (29) by after the pressure break, be unlikely continuation pressurized between pressure head (9) and wedge (7) and become broken, be placed with on the wedge (7) and be about the high pressure limiting gasket ring (8) of compression specimens 2/3rds, compression specimens (29) is placed in the ring.Dynamometer spring group (27) is contained between entablature (10) and the hydraulic jack (20), divides five rows, and four of every rows are positioned at two thickness and are between 10 millimeters the lower end steel plate (28) and upper end steel plate (25).Lower end steel plate (28) is fixed on the gusset (11) of entablature (10), upper end steel plate (25) is fixed with hydraulic jack (20) and dynamometry rack drives bar (13), during loading, dynamometer spring group (27) is subjected to the pressure of hydraulic jack (20) and the shortening (the full load shortening amount is 55.5 to 57.0 millimeters) that is directly proportional with load, drive load simultaneously by dynamometry rack drives bar (13) and connecting rod (6) and show, automatic drawing device (12) work.For preventing the destruction of accidental overload, two pairs of cylindrical cross-section limit for tonnage pads (26) are housed at upper end steel plate (25) and lower end steel plate (28) symmetry to spring.Two impact dampers (15) symmetry is contained in the both sides of hydraulic jack (20), mainly by oil cylinder (22), piston (23), and retaining valve (24), poppet-valve bar (17), fuel tank (21), bumper beam (18) and impact damper pull bar (16) are formed.Fuel tank (21) is fixed on the upper end steel plate (25), and machine oil is filled in the inside.Oil cylinder (22) is fixed in the fuel tank (21).The upper end of piston (23) bar is fixed on the bumper beam (18).Impact damper pull bar (16) passes upper end steel plate (25), and the upper end is fixed on the bumper beam (18), and the lower end is fixed on the lower end steel plate (28).Retaining valve (24) side is shaped on wide, dark each triangular-section breach of 0.2～0.3 millimeter, when upper end steel plate (25) descended with loading, drive fuel tank (21), oil cylinder (22) descended simultaneously, and piston (23) is pulled up, retaining valve (24) is opened, oil cylinder (22) oil-feed.When test specimen is disconnected, the pressure that hydraulic jack (20) adds to dynamometer spring group (27) removes at once, dynamometer spring group (27) resilience at once, drive fuel tank (21), oil cylinder (22) rise simultaneously, piston (23) is depressed relatively, retaining valve (24) is closed, and the machine oil in the oil cylinder (22) is slowly extruded from the breach of retaining valve (24).Surge time is no less than 4 seconds.For the sawtooth pattern curve of material in the surrender stage drawn, before finishing, to mention impact damper poppet-valve bar (17) in the surrender stage, hang on the hack lever that is fixed on fuel tank (21), fall and when driving piston (23) back pressure so that return in a small amount in load, the state that retaining valve (24) still is in out, and unlikely to piston (23) generation resistance, when the surrender stage finishes, will put down poppet-valve bar (17), otherwise impact damper will lose efficacy at once.
Claims (4)
1, a kind of Material Testing Machine, teaching equipment especially for material mechanics experiment, it comprises that entablature (10), sill (1), column (2), worktable (5), back timber (19), pull bar (14), chuck (3), wedge (7), pressure head (9) upper end steel plate (25), lower end steel plate (28), load show, automatic drawing device (12), it is characterized in that, between entablature (10) and back timber (19), hydraulic jack (20), dynamometer spring group (27) and impact damper (15) are equipped with in two pull bars (14) inboard.
2, Material Testing Machine according to claim 1, it is characterized in that, dynamometer spring group (27) is that several identical springs of do as one likes energy, specification are formed side by side, the upper and lower side of each spring be separately fixed at the upper end steel plate (25) with lower end steel plate (28) on, lower end steel plate (28) by central horizontal be fixed on the gusset (11) of entablature (10).
3, Material Testing Machine according to claim 1, it is characterized in that, hydraulic jack (20) is installed between entablature (10) and the back timber (19), in the middle of two pull bars (14), it is gone to the bottom and is horizontally fixed on above the upper end steel plate (25), and its hydraulic jack is adjusted the screw rod upper end and is fixed on the back timber (19).
4, Material Testing Machine according to claim 1, it is characterized in that, impact damper contains by fuel tank (21), oil cylinder (22), piston (23), retaining valve (24), poppet-valve bar (17), impact damper pull bar (16), bumper beam (18) formation, and impact damper is installed on the upper end steel plate (25) of hydraulic jack (20) both sides symmetrically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88221220 CN2041842U (en) | 1988-12-15 | 1988-12-15 | Material testing machine for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88221220 CN2041842U (en) | 1988-12-15 | 1988-12-15 | Material testing machine for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2041842U true CN2041842U (en) | 1989-07-26 |
Family
ID=4853290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88221220 Withdrawn CN2041842U (en) | 1988-12-15 | 1988-12-15 | Material testing machine for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2041842U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144764B (en) * | 2007-09-11 | 2010-08-11 | 中北大学 | Dynamic and static mechanics integrated test platform |
| CN1945267B (en) * | 2006-10-20 | 2011-03-02 | 北京赛迪机电新技术开发公司 | Test machine for mechanism |
| CN102235940A (en) * | 2010-04-23 | 2011-11-09 | 上海宝冶工程技术有限公司 | Large-diameter bolt tensile strength tester |
| CN104634663A (en) * | 2015-03-06 | 2015-05-20 | 扬州大学 | Adjustable device for testing self-balancing long-term stressed wood columns |
| CN108593179A (en) * | 2018-06-26 | 2018-09-28 | 王宏伟 | A kind of physics teaching spring force tester |
| CN110570731A (en) * | 2019-09-19 | 2019-12-13 | 西华大学 | Tensile test analog demonstration instrument |
-
1988
- 1988-12-15 CN CN 88221220 patent/CN2041842U/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1945267B (en) * | 2006-10-20 | 2011-03-02 | 北京赛迪机电新技术开发公司 | Test machine for mechanism |
| CN101144764B (en) * | 2007-09-11 | 2010-08-11 | 中北大学 | Dynamic and static mechanics integrated test platform |
| CN102235940A (en) * | 2010-04-23 | 2011-11-09 | 上海宝冶工程技术有限公司 | Large-diameter bolt tensile strength tester |
| CN102235940B (en) * | 2010-04-23 | 2014-06-04 | 上海宝冶工程技术有限公司 | Large-diameter bolt tensile strength tester |
| CN104634663A (en) * | 2015-03-06 | 2015-05-20 | 扬州大学 | Adjustable device for testing self-balancing long-term stressed wood columns |
| CN108593179A (en) * | 2018-06-26 | 2018-09-28 | 王宏伟 | A kind of physics teaching spring force tester |
| CN110570731A (en) * | 2019-09-19 | 2019-12-13 | 西华大学 | Tensile test analog demonstration instrument |
| CN110570731B (en) * | 2019-09-19 | 2021-11-02 | 西华大学 | Tensile test analog demonstration instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |