CN108489825B - Load measuring device of four-point type rotary bending fatigue testing machine - Google Patents
Load measuring device of four-point type rotary bending fatigue testing machine Download PDFInfo
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- CN108489825B CN108489825B CN201810192408.1A CN201810192408A CN108489825B CN 108489825 B CN108489825 B CN 108489825B CN 201810192408 A CN201810192408 A CN 201810192408A CN 108489825 B CN108489825 B CN 108489825B
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- bending fatigue
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- 238000005452 bending Methods 0.000 title claims abstract description 35
- 238000009661 fatigue test Methods 0.000 title claims abstract description 33
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims 2
- 238000009434 installation Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 14
- 238000005259 measurement Methods 0.000 description 5
- 239000000725 suspension Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation 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
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
-
- 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
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0033—Weight
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- 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)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to a load measuring device of a four-point type rotating bending fatigue testing machine, which comprises a lever, a lever bracket and a pair of load measuring mechanisms, wherein the load measuring mechanisms are respectively arranged at two ends of the lever and are symmetrical by taking the lever bracket as an axial center. The load measuring mechanism comprises a hanging piece, the lower part of the hanging piece is sequentially connected with a load measurer, a U-shaped lifting appliance is arranged below the load measurer, the opening of the U-shaped lifting appliance is downward, connecting blocks are respectively arranged on two supporting legs of the U-shaped lifting appliance, four connecting blocks are configured on the left U-shaped lifting appliance and the right U-shaped lifting appliance, and the four connecting blocks are respectively connected with four hanging points of a counterweight lever of the four-point type rotary bending fatigue testing machine. The two load measuring mechanisms are completely symmetrical, the force arms are equal, under the measuring state, the four connecting blocks are reliably connected with the four hanging points of the weight lever to be measured, and the sum of the two measuring values is the load of the four-point type rotary bending fatigue testing machine. The invention has simple design and convenient operation, and more directly characterizes the load precision of the testing machine.
Description
Technical Field
The invention belongs to the field of load measurement, and particularly relates to a load measuring device of a four-point type rotary bending fatigue testing machine.
Background
The four-point rotary bending fatigue testing machine is an important instrument for detecting the rotary bending fatigue performance of materials, and the precision of equipment is characterized mainly by measuring the weight mass and the force arm matched with the rotary bending fatigue testing machine in the past.
If a device can measure the load of the four-point rotary bending fatigue testing machine, the load precision of equipment can be more directly represented, and no device for specially measuring the load of the four-point rotary bending fatigue testing machine exists at present.
Disclosure of Invention
The invention aims to solve the technical problem of providing a load measuring device aiming at the prior art, and realizing accurate measurement of the load of a testing machine according to the working mode of a four-point type rotary bending fatigue testing machine.
The application solves the problems by adopting the technical scheme that the load measuring device of the four-point type rotating bending fatigue testing machine comprises a lever, a lever bracket and a load measuring mechanism, wherein the lever is transversely supported on the lever bracket, the supporting points are used as lever fulcrums, and the load measuring mechanisms are in a pair and are respectively arranged at two ends of the lever and are axially and symmetrically arranged by taking the lever bracket as an axis center. The load measuring mechanism comprises a hanging piece, the hanging piece is sleeved on the lever and can be displaced, and the distance between the hanging piece and the fulcrum is the measuring force arm of the load measuring mechanism where the hanging piece is located; the load measurer is connected to the lower part of the hanging piece in sequence, the U-shaped hanging tool is arranged below the load measurer, the opening of the U-shaped hanging tool faces downwards, the connecting blocks are respectively arranged on the two supporting legs of the U-shaped hanging tool, the left U-shaped hanging tool and the right U-shaped hanging tool are respectively provided with four connecting blocks in total, and the four connecting blocks are respectively correspondingly connected with four hanging points of a counterweight lever of the four-point type rotating bending fatigue testing machine.
The two load measuring mechanisms are completely symmetrical, the moment arms are equal, under the measuring state, the four connecting blocks are reliably connected with the four hanging points of the weight lever to be measured of the testing machine, the measuring values of the two load measuring devices are theoretically equal, and the sum of the two measuring values is the load of the four-point type rotary bending fatigue testing machine. The load measuring range of the application can be changed by adjusting the force arm, and the application range is enlarged.
Preferably, the hanging piece is composed of a hanging ring and a middle connecting piece, the middle connecting piece is hung below the hanging ring, and the load measurer is connected below the middle connecting piece.
The lever bracket comprises a base plate, 4 upright posts, 8 nuts and a supporting plate, wherein the 4 upright posts are vertically erected on the base plate, the 8 nuts are divided into an upper group and a lower group, 4 nuts are respectively arranged in the upper group and the lower group, the supporting plate is horizontally fixed on the upper parts of the 4 upright posts, and the lever is horizontally supported on the supporting plate.
The balance of the lever and the stability in the horizontal direction are important, and the center positions of the supporting plate and the lever are respectively provided with screw holes which are vertically corresponding, and the supporting plate and the lever are vertically connected and fixed through bolts.
Further, the connecting holes for fixing the hanging ring are respectively drilled at the positions of the two ends of the lever, which are at different distances from the middle point, so that different measuring force arms can be adjusted, the load measuring device is suitable for load measurement of test machines in different states, and the measuring range of the load is adjusted.
Preferably, hanging ring connecting holes corresponding to connecting holes at two ends of the lever are formed in the hanging ring of the pendant, the hanging ring can be fixed on the lever through the bolt, and therefore the distance between the connecting holes and the center line point of the lever is the arm of force of the four-point rotary bending fatigue testing machine. For the lever made of square steel, the hanging ring is also square frame type.
Preferably, the support plate is mounted horizontally: 4 nuts are taken, screwed in from the upper ends of the 4 upright posts respectively, adjusted to the positions of the nuts on the 4 upright posts are similar, the base plate is placed on a horizontal plane, the 4 upright posts are sleeved in the supporting plate and supported below by the 4 nuts, meanwhile, the level gauge is placed on the supporting plate, the 4 nuts are finely adjusted to the level of the supporting plate, and then the other 4 nuts are screwed in from the upper ends of the upright posts respectively to fix the supporting plate.
The load measurer is a meter, can be purchased directly, and the connecting parts at the upper end and the lower end are provided with threads.
Compared with the prior art, the application has the advantages that: according to the testing principle of the four-point type rotating bending fatigue testing machine, the application specifically develops a set of load measuring device based on the lever principle, and can measure the load of the testing machine with high precision and high accuracy. During testing, 4 connecting blocks at the lower ends of the two U-shaped lifting appliances are respectively connected with 4 suspension points of a counterweight lever of the rotary bending fatigue testing machine, after a load measurer is cleared, weights are gradually added on the testing machine, and then the load of the four-point rotary bending fatigue testing machine can be measured.
After the test machine is stable, the load of the test machine is obtained by reading the load measuring devices at the left side and the right side and adding the readings.
The four-point type rotating bending fatigue testing machine has a simple structure, is convenient to operate, and can accurately and directly measure the load of the four-point type rotating bending fatigue testing machine.
Drawings
FIG. 1 is a front view of a load measuring device according to an embodiment of the present invention;
fig. 2 is a perspective view of a load measuring device according to an embodiment of the invention.
1-A base plate; 2-stand columns; 3-M10 nuts; 4-a support plate; a 5-M10 nut; 6-rectangular connecting blocks; 7-U-shaped lifting appliance; 8-a load measurer; 9-an intermediate connection; 10-lever; 11-square hanging rings; 12-M6 bolt.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1, the load measuring device in the present embodiment is suitable for load measurement of a four-point type rotating bending fatigue testing machine. The device comprises a lever 10, a lever bracket, a load measurer 8 which takes the lever bracket as symmetry, a hanging part thereof, a U-shaped lifting appliance 7 and four rectangular connecting blocks 6, wherein all accessory materials are hard metals. Four rectangular connecting blocks 6 are respectively arranged below the left U-shaped lifting appliance 7 and the right U-shaped lifting appliance 7 and are connected with 4 hanging points of a counterweight lever of the rotary bending fatigue testing machine.
In the load measurement process of the four-point type rotary bending fatigue testing machine, the driving shaft and the driven shaft of the testing machine are controlled to be positioned at horizontal positions as much as possible.
The lever bracket specifically comprises a base plate 1, four upright posts 2, a horizontal supporting plate 4 and 8M 10 nuts, wherein the base plate 1 is placed between a driving shaft and a driven shaft of a testing machine, and the positions of the base plate 1 are adjusted back and forth and left and right. The thickness of the base plate 1 is 20mm, and 4M 10 threaded holes which are symmetrically distributed and have a depth of 12mm are drilled. The length of the 4 upright posts 2 is 800mm, the diameter is 15mm, the lower ends of the upright posts are turned into M10 threads, and the length is 12mm; the upper end is turned into M10 threads with the length of 150mm. The lower end is connected with a threaded hole of the base plate 1. The thickness of the supporting plate 4 is 15mm, 4 circular holes with the thickness of the through plate and the diameter of 12mm are drilled, the positions of the circular holes correspond to the threaded holes of the base plate 1, and the distribution positions are identical. In addition, 2M 6 threaded holes are drilled in the middle position.
4M 10 nuts 3 are taken, screwed in from the upper ends of 4 upright posts 2, and adjusted to proper positions. The base plate 1 is placed on a horizontal plane, 4 stand columns are sleeved in the supporting plate 4, and the supporting plate is supported by 4 lower nuts 3. And the level is placed on the support plate 4 and the 4 lower nuts 3 are trimmed until the support plate 4 is level. 4 remaining nuts 5 are screwed from the upper end of the upright 2 to fix the support plate 4.
The lever 10 has a length of 800mm, 2M 6 threads 12 are drilled in the middle, the positions of the M6 threads are the same as those of the middle threaded holes of the support plate 4, and the lever 10 is fixedly connected with the support plate 4 by using bolts. The two ends of the lever 1) are respectively drilled with connecting holes with the diameter of 6mm from the positions of 200 mm, 250 mm and 300mm of the middle point.
The load measurer 8 is a measuring device, can be purchased directly from the market, and has a screw structure at the connection parts of the upper and lower ends. The hanging part of the load measurer 8 consists of a square hanging ring 11 and an intermediate connecting piece 9. The lower end of the square hanging ring 11 is provided with an M6 bolt, and the length is 30mm; the upper end is drilled through a round hole with the diameter of 6mm, a thin bolt can be used for inserting the round hole and is fixed in a connecting hole on the lever 10, and the distance from the connecting hole to the center line point of the lever 10 is the arm of force of the four-point rotary bending fatigue testing machine.
The middle connecting piece 9 is a cylinder, M6 threaded holes are drilled at the upper end and the lower end of the cylinder, an upper threaded hole is connected with a square hanging ring 11, and a lower threaded hole is connected with a load measurer 8.
And a M6 threaded hole is drilled in the center of the upper end of the U-shaped lifting appliance 7 and is connected with a bolt at the lower end of the load measurer 8. Two sides of each U-shaped lifting appliance 7 are drilled through round holes with the diameter of 10 mm. The rectangular connecting blocks 6 are required to be 4 in number, two 10mm round holes are drilled at the positions, which are 40mm away from each other, on the central line, the upper round holes are connected with the round holes of the U-shaped lifting tool 7 by bolts, and the lower round holes are connected with the hanging points of the four-point type rotary bending fatigue testing machine.
During the test, the corresponding force arm on the lever is adjusted according to the force arm of the tester, and square hanging rings 11 at two ends of the lever 10 are sleeved on the lever and fixed by a thin bolt. The cylindrical middle connecting piece 9, the load measurer 8, the U-shaped lifting appliance 7 and the rectangular connecting block 6at two ends of the lever 10 are connected in sequence, and the positions are adjusted and fixed. Four suspension points (equivalent to four suspension points of a counterweight lever) on the driving shaft and the driven shaft are sleeved in a lower round hole of the rectangular connecting block 6 in sequence, and the positions are finely adjusted.
After the load measurer 8 is cleared, weights are gradually added, and the load of the four-point type rotary bending fatigue testing machine can be measured.
In summary, the load measuring device of the 4-point type rotary bending fatigue testing machine has the advantages of simple design and convenient operation, and more directly characterizes the load precision of the testing machine.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions that are formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present invention.
Claims (4)
1. The utility model provides a load measuring device of four point type rotatory bending fatigue testing machine which characterized in that: the device comprises a lever (10), a lever bracket and a load measuring mechanism, wherein the lever is transversely supported on the lever bracket, a supporting point is used as a lever fulcrum, and the load measuring mechanism is a pair and is respectively arranged at two ends of the lever and is symmetrical by taking the lever bracket as an axial center;
the load measuring mechanism comprises a hanging piece, the hanging piece is sleeved on the lever and can be displaced, and the distance between the hanging piece and the fulcrum is the measuring force arm of the load measuring mechanism where the hanging piece is located;
The lower part of the hanging piece is sequentially connected with a load measurer (8), a U-shaped lifting appliance (7) is arranged below the load measurer (8), the opening of the U-shaped lifting appliance (7) is downward, two supporting legs of the U-shaped lifting appliance (7) are respectively provided with a connecting block (6), the left U-shaped lifting appliance and the right U-shaped lifting appliance are respectively provided with four connecting blocks (6), and the four connecting blocks (6) are respectively connected with four hanging points of a counterweight lever of the four-point type rotary bending fatigue tester;
The two load measuring mechanisms are completely symmetrical, the moment arms are equal, under the measuring state, the four connecting blocks are reliably connected with the four hanging points of the weight lever to be measured, the measuring values of the two load measuring devices are theoretically equal, and the sum of the two measuring values is the load of the four-point type rotary bending fatigue testing machine;
The lever bracket comprises a base plate (1), 4 upright posts (2), 8 nuts and a supporting plate (4), wherein the 4 upright posts (2) are erected on the base plate (1), the 8 nuts are divided into an upper group and a lower group to horizontally fix the supporting plate (4) on the upper parts of the 4 upright posts, and the lever (10) is horizontally supported on the supporting plate (4); the supporting plate (4) and the lever (10) are respectively provided with screw holes which are vertically corresponding in the center position, and the supporting plate (4) and the lever (10) are connected and fixed up and down through bolts; the horizontal installation mode of the supporting plate (4) is as follows: 4 nuts are taken, screwed in from the upper ends of the 4 upright posts (2) respectively, the positions of the nuts on the 4 upright posts are regulated to be similar, the base plate (1) is placed on the horizontal plane, the 4 upright posts are sleeved with the supporting plate (4), the 4 nuts are supported below, meanwhile, the level gauge is placed on the supporting plate (4), the 4 nuts are finely regulated to the level of the supporting plate (4), and then the other 4 nuts are screwed in from the upper ends of the upright posts (2) respectively, so that the supporting plate (4) is fixed.
2. The load measuring device of the four-point type rotating bending fatigue testing machine according to claim 1, wherein: the hanging piece is composed of a hanging ring and a middle connecting piece, the middle connecting piece is hung below the hanging ring, and the load measurer is connected below the middle connecting piece.
3. The load measuring device of the four-point type rotating bending fatigue testing machine according to claim 2, wherein: connecting holes for fixing the hanging ring are drilled at positions of the two ends of the lever (10) at different distances from the middle point respectively.
4. The load measuring device of the four-point type rotating bending fatigue testing machine according to claim 3, wherein: the hanging ring is provided with hanging ring connecting holes corresponding to connecting holes at two ends of the lever, the hanging ring can be fixed on the lever through the bolt, and the distance between the connecting holes and the center line point of the lever is the arm of force of the four-point rotary bending fatigue testing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810192408.1A CN108489825B (en) | 2018-03-09 | 2018-03-09 | Load measuring device of four-point type rotary bending fatigue testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810192408.1A CN108489825B (en) | 2018-03-09 | 2018-03-09 | Load measuring device of four-point type rotary bending fatigue testing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108489825A CN108489825A (en) | 2018-09-04 |
| CN108489825B true CN108489825B (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810192408.1A Active CN108489825B (en) | 2018-03-09 | 2018-03-09 | Load measuring device of four-point type rotary bending fatigue testing machine |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110361286A (en) * | 2019-07-22 | 2019-10-22 | 中国航发沈阳发动机研究所 | A kind of rotary bending tester calibrating installation and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210621U (en) * | 1987-10-09 | 1988-03-30 | 东北工学院 | Rotating bending fatigue tester with superimposed load |
| JPH1082725A (en) * | 1996-09-10 | 1998-03-31 | Ngk Insulators Ltd | Method and equipment for testing bending strength of ceramic cylinder |
| CN2298514Y (en) * | 1997-07-18 | 1998-11-25 | 西北建筑工程学院 | Lever-type bend tester |
| CN102998188A (en) * | 2012-12-13 | 2013-03-27 | 济南沃德汽车零部件有限公司 | Lever-type semi-automatic valve rotation bending tester |
| CN208076309U (en) * | 2018-03-09 | 2018-11-09 | 江阴兴澄特种钢铁有限公司 | A kind of load-measuring device of four-point rotary bending tester |
-
2018
- 2018-03-09 CN CN201810192408.1A patent/CN108489825B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210621U (en) * | 1987-10-09 | 1988-03-30 | 东北工学院 | Rotating bending fatigue tester with superimposed load |
| JPH1082725A (en) * | 1996-09-10 | 1998-03-31 | Ngk Insulators Ltd | Method and equipment for testing bending strength of ceramic cylinder |
| CN2298514Y (en) * | 1997-07-18 | 1998-11-25 | 西北建筑工程学院 | Lever-type bend tester |
| CN102998188A (en) * | 2012-12-13 | 2013-03-27 | 济南沃德汽车零部件有限公司 | Lever-type semi-automatic valve rotation bending tester |
| CN208076309U (en) * | 2018-03-09 | 2018-11-09 | 江阴兴澄特种钢铁有限公司 | A kind of load-measuring device of four-point rotary bending tester |
Non-Patent Citations (1)
| Title |
|---|
| 悬臂弯曲加载试验机的设计及其应用;张亚军;;材料开发与应用(第05期);全文 * |
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| CN108489825A (en) | 2018-09-04 |
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