WO2011044958A1 - Hebelarmprüfmaschine - Google Patents
Hebelarmprüfmaschine Download PDFInfo
- Publication number
- WO2011044958A1 WO2011044958A1 PCT/EP2009/066136 EP2009066136W WO2011044958A1 WO 2011044958 A1 WO2011044958 A1 WO 2011044958A1 EP 2009066136 W EP2009066136 W EP 2009066136W WO 2011044958 A1 WO2011044958 A1 WO 2011044958A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lever arm
- test
- force
- power transmission
- hebelarmprüfmaschine
- Prior art date
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Classifications
-
- 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
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/14—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by dead weight, e.g. pendulum; generated by springs tension
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
-
- 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
-
- 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
- G01N2203/0071—Creep
Definitions
- the present invention relates to a Hebelarmprüfmaschine according to the preamble of claim 1. Next, it relates to a test method according to the preamble of claim 12 and a flexurally elastic bearing element according to the preamble of claim 13.
- the present invention is concerned with Hebelarmprüfmaschinen as they are used in material testing, especially for tensile and creep.
- the creep test of materials, a distinction is made between the creep test, time-lapse test and stress relaxation test.
- the creep test the deformation of the material is determined as a function of time at a constant temperature and load.
- the time-lapse tear test examines slopes of materials breaking under overload conditions.
- the stress relaxation test is similar to the creep test - the strain is kept constant, but the load decreases.
- test procedures The test procedures, the test requirements and the acceptable errors during the test are described in many standards, eg. In ISO 7500-1 for many European countries, ASTM E 292 and ASTM E 1012 for the USA. As an important criterion that results from the standards, the axiality in the measurement or testing is observed.
- the 4-cutting element is rotated one more position and a new cutting edge is available. Because the counterpart to the cutting edge, the pan, which is designed as a pointed groove in the testing machine of Applied Test Systems Inc., is subject to wear, the pan is replaceable. It is readily apparent that despite these adjustments, the problem of wear has not been solved.
- Object of the present invention is therefore to improve known Hebelarmprüfmaschinen so that a high test precision is permanent and wear and friction losses are reduced.
- a Hebelarmprüfmaschine is used with the help of, for example, dead weights, spring loads or single spindles a test force on a test sample applied.
- the test load is applied to the test specimen to perform creep tests, such as creep rupture, time-lapse cracks or stress relaxation tests, on the test specimen and to determine the elastic, plastic or thermal behavior of a test specimen, e.g. B. from a metallic material to investigate.
- creep tests such as creep rupture, time-lapse cracks or stress relaxation tests
- the results are often recorded in creep diagrams and tell designers how to use the selected material and where its load limits are.
- a lever testing machine according to the invention can be used advantageously as Hebelarmzeitstandprüfmaschine, because in these it depends on the long-term, reproducible test management.
- the test load should be applied to the test sample, among other things as a tensile test. As test samples are metallic material samples, woods, plastics and other materials into consideration.
- the testing machine has emerged with an overhead lever arm as particularly advantageous.
- the sample is below the lever arm.
- the lever arm is used to convert an initiating force to a test force, i. h., usually reinforce.
- the pull on one side of the lever arm is introduced into the sample on the other side of the lever arm as test load. For this reason, at least the lever arm is movable to store.
- the Hebelarmprüfmaschine has at least one bearing.
- the bearing is advantageously a flexurally elastic bearing joint.
- the bearing of the lever arm has an influence on the measurement accuracy and the reproducibility of the test result. If the lever arm of the Hebelarmprüfmaschine stored by means of a flexurally elastic bearing joint, it has been shown that the error influence is reduced due to the storage.
- an inventive method is used in the operation of a corresponding Hebelarmprüfmaschine, the measurements are improved.
- an initiating force is not applied directly to the test sample, but for the test sample, an initiating force is converted to a test force via the lever arm.
- the measurement accuracy, z can be using an advantageous storage, the measurement accuracy, z.
- the test load is introduced as true as possible. For as unadulterated test force, it is important that the wear, especially over time, remains small. An undisturbed test load also contributes, if the test force can be introduced into the test sample as frictionless as possible.
- the invention contributes to the fact - generally speaking - of a wear-free and a frictionless storage in a corresponding Hebelarmprüfmaschine can be spoken because the wear and the friction in the bearings remains low for a long time.
- the test load is unadulterated if it can be initiated exempted from shear force components. Transverse force components can be caused by deflections or discharges. If the bearing is realized by means of a flexurally elastic element, the element prevents the additional adulteration by lateral force components that can be caused by the bearing of the lever arm, the sample or by the initiation of the initiating force. If the test sample is placed in the direction of gravity, the test load should be introduced into the test sample in an axially aligned manner.
- the introduced force is introduced into the lever arm directly and completely as a test force in the test sample.
- the set force which is introduced as an initiating force in the lever arm, comes with their gear ratio almost completely as test load in the test sample.
- a flexurally elastic bearing element can be installed in a Hebelarmprüfmaschine.
- the flexurally elastic bearing element acts like a block. As a block, all forms are called, which exist contiguous, z. B. as cylinders, rods, cuboids, rectangles or cubes.
- the block has a longitudinal extent.
- the longitudinal extent thus has a longitudinal direction. Over the longitudinal direction, a force is transmitted.
- the longitudinal direction is thus the main force direction.
- the block also has a transverse extension.
- the transverse extent is not equal at all points of the block. The transverse extent occurs along the longitudinal direction with different widths.
- the different widths are shaped so that at least one point a web can be seen.
- the bridge has the narrowest width in the block.
- the bridge is created by rejuvenating shaping.
- the bridge is so narrow that at the expected forces the bearing joint in the region of the web can make a bend.
- the rejuvenations can follow the structure of a half shell. For this purpose cuts can be made in the block.
- the half-shells are filled to a certain extent with material.
- the filler serves as a stop limit.
- the stop limit is in a section of its surface of the sectional shape, ie in particular imitated the half shells.
- the shaping of the tracking limit stops prevent the block in its rotational mobility.
- the disability is present in particular in transverse extent.
- the stop limit can be formed in one piece.
- the stop limit is a piece of the bearing element or the bearing joint.
- a bearing joint whose web width corresponded to about 1/15 to 1/35 of the total height of the block.
- Each of the two cuts for web formation is preferably realized as a horizontal section, ie transversely to the longitudinal extension of the block, to which a circular arc segment adjoins.
- the horizontal section preferably has a length of about 1/3 to 1/10 of the total height of the block and is thus about 3 to 8 times as long as the bridge is wide.
- the radius of the arc segment depends on the length of the horizontal cut, the web width and the height of the block. It proved to be advantageous if the radius corresponds to 0.5-1.5 times the height of the block.
- the cutting width will depend on the desired bend, as this provides a stop. It turned out to be advantageous if the section is narrower than or at most as wide as the bridge, z. B. 20-80% of the web width.
- the gear ratio of the lever arm is between 1:10 and 1:50.
- About such lever arms test forces of z. B. 2500 kN be initiated.
- the other known bearings of a lever arm do not allow such high testing forces in the required accuracy classes.
- the Hebelarmprüfmaschine invention shows lower error influences. In the critical long-term studies can be assumed that a virtually wear-free storage. The caused by the storage error components in the measurement result are advantageous not generated by the skillful storage.
- the flexurally elastic bearing joint has a, at least one point constricted power transmission block.
- the power transmission block is tapered in a constriction direction by the formation of a web.
- a test force can be transmitted in a direction transverse to the constriction direction of force transmission, z. B. on subsequently arranged in the direction of force test sample.
- the Hebelarmprüfmaschine has in one embodiment a lever arm, which spans the test sample from above.
- the lever arm is suspended so that it can be operated with two different lever arm lengths.
- the lever arm is pivotable about one Pivoted, each extending to one side about the pivot point, a lever arm.
- the pivot point is located in the web of the power transmission block.
- a joint can be a ball joint.
- a joint can be a flexurally elastic bearing joint. If the lever arm is mounted by means of a flexurally elastic bearing joint, further flexurally elastic bearing elements can be provided laterally, in particular engaging in the lever arm. Each individual flexurally elastic bearing element can have its own web. The webs of the power transmission blocks should be strung with their pivots in a single plane for particular benefits when extending over a common axis. On the lever arm, the power transmission blocks are present so that these forces can be in or out.
- the lever arm of the Hebelarmprüfmaschine is suspended so that it is arranged to move against gravity.
- different storage methods are conceivable.
- the traverse can be used, which holds the Hebelarmprüfmaschine from the top together.
- the lever arm is mounted against the gravity of the cross member, that is, the storage does not take place on the side of the lever arm, which is directed towards the ground, but in the opposite direction, so to speak in the direction of the "Gravity" pulls down from this perspective, the storage is upwards.
- the truss can be mounted on columns, eg on corner pillars.
- the corner pillars enclose the test room.
- the test room is located between the columns, which open in the corners of the truss.
- the lever arm is suspended at the pivot on its pivot.
- the lever arm means for introducing and discharging forces, such as an initiating force and the test force, attached.
- Such means may be trays, chains, rods, rods and other power transmission means.
- the flexurally elastic bearing joint is in an advantageous embodiment, a at least one point to a web constricted power transmission block.
- the bridge is z. B. formed by converging circular arcs. The circular arcs can in the Kraftübertragungsblock be anodized
- the circular arcs act like cuts.
- the cuts are made in the power transmission block.
- the power transmission block acts like a solid block in which cuts are made at selected locations to form motion spaces.
- the block-like outer dimensions of the power transmission block are maintained.
- material originally originating from the power train itself remains as an obstruction block.
- the obstruction block creates a bending limit for the elastic bearing joint.
- a flexurally elastic bearing joint may be a force transmission element, in which a longitudinal direction is guided over a tapering point, the buckling movement is braked by at least one, present at the side of the taper, connected to one side of the power transmission element stop arch.
- the stop arc as part of the power transmission element limits the maximum deflection.
- the stop sheet has a similar curvature as the tapers that make up the web.
- the incision progresses towards the rejuvenation site.
- the stop sheet can be the same material as the rest of the block.
- the stop sheet may be made of a heat treated tool steel.
- the stop sheet can be integrally formed as part of the force transmission element from this.
- the Hebelarmprüfmaschine has the test room at a medium altitude, z. B. in handling height. Above the test room intended for holding the test sample is arranged a ball-like joint. This means that not all joints are completely identical. The ball-like joint can be located between the lever arm and the test room. Thus, in one embodiment, the Hebelarmprüfmaschine be regarded as a collection of different joints. A joint is a corresponding block, which represents a flexurally elastic bearing joint.
- an oven may be present. Temperature tests can be carried out with the oven.
- the test room in which the test sample is to be mounted stationary, enclosed by a test room enclosing furnace.
- the oven can in turn be attached to the corner pillars.
- the oven is used to temper the sample.
- the joints are advantageously arranged outside the furnace.
- the introduction force should be adjustable. So different test profiles can be applied to a sample.
- the introduction force is introduced via a traction means, such as a chain or a rod, parallel to a test direction in the lever arm.
- the lever arm offers the transmission ratio, which consists of two lever arm lengths. In each case a lever arm length is located on one side of the pivot point (the central pivot point).
- the test force which is in particular higher than the introduction force, results from the introduction force multiplied by the ratio of the lever arm.
- sample error can have many causes.
- a cause can z. B. are that the thread to which the sample is attached, have been cut with a slope, so that the sample is not completely in the axial extension of the fürkraftraum.
- the sample can cause Verzwteilungen.
- sample error refers to spatial deviations from the axial direction in the load on the sample. B. caused by the rocking or rotary movement of the lever arm. With the term “geometry error” can also detect such error influences that lead to a lever movement to obliquely inserted or discharged forces in or out of the lever arm.
- bending elastic joints can be used particularly advantageous.
- the lever arm offers a flexible elastic joint.
- the load line so arranged on an axle components for the test load, the use of a flexurally elastic joint offers.
- the load line in which the test load is transmitted, is supported by a flexible element.
- the weight cord can also be stored via a flexurally elastic element. In the weight strand, the weight or the spring force is transmitted.
- the geometry error in the lever movement can also be compensated here.
- the geometry error of the lever arm can be compensated in the sketchachse.
- one or more ball joints also sample errors can be compensated.
- the elasticity in the joints in particular by the movement allowed in the block-like joint by the incised arch, at least partially compensates for the faults or does not allow them at all.
- the joints according to the invention contribute to the fact that it may be assumed that the Hebelarmprüfmaschine has no mechanical wear in their bearings more.
- the bearings can be considered frictionless.
- the measurement accuracy is not deteriorated over time.
- a flexurally elastic cross-section results from two opposing cuts, which are structurally designed so that in the bending direction, ie laterally, a maximum soft bending results, but in the axial direction represents a stiff as possible bending.
- an advantageous bending joint is designed to protect against excessive bending deflections. After a certain deflection, the radius surfaces mechanically abut each other after bridging the gap between them, thus limiting the maximum bending.
- Fig. 1 a front view of a Hebelarmprüfmaschine invention
- Fig. 2 is a side view of the Hebelarmprüfmaschine of Fig. 1;
- FIG. 3 shows a section A-A through the Hebelarmprüfmaschine in Fig. 1.
- FIG. 4 shows a plan view through a lever arm of the lever arm testing machine according to the invention of FIG. 1;
- FIG. 5 shows a side view through the lever arm of FIG. 4, wherein the front wall has been omitted;
- FIG. 6 shows a first exemplary embodiment of a flexurally elastic bearing joint according to the invention in front view (A), side view (B) and top view (C);
- Fig. 7 a second embodiment of a bending elastic according to the invention
- FIG 8 shows a third exemplary embodiment of a flexurally elastic bearing joint according to the invention in front view (A), side view (B) and top view (C);
- FIGS. 1 to 3 show a lever arm testing machine 1 according to the invention in various embodiments with an overhead lever arm 25, which is held by the cross member 13. Under the lever arm 25 of the working space is present in the z. B. the oven 5 for receiving a test sample 65 can be opened.
- the lever arm 25 is mounted against the gravitational force F G via the first bearing 67.
- the bearing 67 is located between traverse 13 and lever arm 25.
- the bearing 67 can be considered age-independent and frictionless.
- bearing joints 69, 71, 73, 75, 77 are placed, which are either a ball-like joint 79 or a power transmission block 100, 200.
- the power transmission block 100 can be seen in FIG.
- Another embodiment of a power transmission block 200 can be seen in FIG.
- the introduction force F E is introduced into the lever arm 25 via the bearing joint 69 in order to be transferred to the test sample 65 as a test force F P by the lever arm ratio of the two lever arm lengths 41, 43.
- the test force F P acts counter to the gravitational force F G.
- the initiating force F E reaches the sample 65 directly and completely as the test force F P. Further advantageous aspects, the expert in Figures 1 to 7 refer directly.
- FIG. 3 shows a view from above along the section AA according to FIG. 1.
- the applied forces can be adjusted via a control cabinet 7.
- the introduction force F E is set by a weight 26.
- the introduction force F E is variable.
- the adjustable force is converted via the lever arm 25 in the test force F P.
- the lever arm 25 is rotatably mounted at the pivot point 45.
- the lever arm 25 has on each side 47, 49 of the pivot point 45 a Hebelarmin 41, 43.
- the Hebelarmdorfn 41, 43 are different lengths. So that the lever arm 25 is as balanced as possible in a horizontal position, the lever arm 25 has a tare mechanism or a tare unit 51.
- the lever arm 25 is a hollow body, which consists of a first wall 27, a second wall 29, a first spacer 33 and a second spacer 35 composed.
- the walls 27, 29 and the spacers 33, 35 extend longitudinally so that the cavity extends from the gravity side 53 to the upper side 55 through the lever arm 25.
- the bearing joint holding shell 31 is the fastening means for at least some (71, 73) of the bearing joints 69, 71, 73, 75, 77.
- the bearing joints 69, 71, 73, which are arranged in the lever arm 25, extend in a plane 57. The plane 57 can be determined from the pivot points of the individual transmission blocks.
- the pivot points such as the pivot point of the lever arm 25, lie in the same plane 57.
- a first axis 59 can be pulled through the pivot points inside the lever arm 25.
- Another axis 61 is nearly perpendicular to the first axis 59.
- the second axis 61 can be pulled through the test sample 65.
- the Hebelarmprüfmaschine 1 is completed on the one hand by the housing 9, 1 1. In the housing 9, 1 1, the control and Kraftausübungs- or force measuring devices are arranged. The Hebelarmprüfmaschine 1 is completed on the other side by the traverse 13.
- the Traverse 13 represents the upper limit of the Hebelarmprüfmaschine 1.
- the Hebelarmprüfmaschine provides between the lower drive spindle 81 and the crossbar 13 a place for the test space 3.
- the Traverse 13 also serves as a mounting plate of the lever arm 25.
- the Traverse 13 is through the columns 15th , 17, 19, 21 held in position. In the columns 15, 17, 19, 21, which are designed sufficiently stable, screw threads are cut at their ends to which the cross member 13 can be placed.
- the lever arm 25 is connected via a first bearing 67 on the cross member 13.
- the columns 15, 17, 19, 21 are spaced so far that not only is there space for a sample 65 between the columns 15, 17, 19, 21, but also that a furnace 5 can be placed pivotably between the columns.
- the oven 5 can enclose the sample 65 and temper it during a material test.
- the bearing joint 69 is located between the means 23 for introducing the introduction force F E and the lever arm 25.
- the bearing joint 69 is fixed at the level of the plane 57.
- the bearing joint 69 offers a compensation possibility for initiating the introduction force F E, so that the force F E can be taken as perpendicular as possible to the lever 25th
- the lever arm 25 is pivotally supported around the pivot point 45 by the bearing 67.
- a bearing joint 71 provides a pivotable compliance.
- Another one Bearing joint 73 is available for discharging the force from the lever arm 25.
- the test force F P is delivered to the power transmission device 64 via the bearing joint 73.
- To compensate for vertical deflections a bearing joint 75 is provided. As advantageous spherical ball 79 has been found.
- Another hinge 77 is disposed below the test sample 65. Elongations of the test sample can be compensated by the joints 73, 75 and 77. Deflections of the lever arm 65 can be compensated by the joints 69, 71
- the joints 69, 71, 73 are formed by power transmission blocks such as the power transmission blocks 100, 100 ', 200, 200'.
- the power transmission block 100 is a solid block that has a location 101 that is a necked spot compared to the rest of the block.
- the solid block 100 is determined by its outer dimensions 107, resulting from the extensions 109, 1 1 1, 1 13.
- In the direction of extension 1 1 1 sections 1 19, 121 run in the block 100.
- the cuts 1 19, 121 taper the available for the transmission of the testing or inducing force F P , F E cross section in the block 100th Die Sections 1 19, 121 are encoded in block 100.
- Each section 1 19, 121 is composed of partial sections 123, 125 together. Starting from the side of the block 100 initially extends a horizontal section 123, followed by a curved section 125 connects.
- the cuts 1 19, 121 are introduced so that the webs 103 extend transversely to the gravity F G in the blocks 100.
- the maximum transferable force is set. Due to the radius of the arcs 1 15, 1 17 Knickang. Abwink the blocks 100 set.
- the stop arcs 131, 133 the kink width is limited.
- the power transmission block 200 of FIG. 7 is similar to the power transmission block 100 of FIG. 6.
- the power transmission block 200 provides additional bores 235 which threadedly provide for connection to other components such as the bearing pivot bracket 31 or like the chain as means 23 for initiating an initiating force, screw holes.
- the power transmission block 200 is overall slightly slighter, in particular narrower than the power transmission block 200.
- the power transmission block 200 operates with rounded surfaces. The bending range is determined by the free space that the cuts provide.
- FIG. 8 shows another embodiment of a power transmission block 100 'from various views (FIGS. 8A, 8B, 8C).
- the power transmission block 100 ' has in its peripheral regions a plurality of recesses 135, 137 which have different diameters.
- the recesses 135, 137 can be used so that the power transmission blocks 100 'can be inserted and screwed into bearing shells, so that the power transmission blocks 100' in each case at the ends of the power transmission block 100 'slipped bearing shells from each other in a flexurally elastic manner and at the same time mechanically strong together connect.
- the power transmission block 100 ' is similar to the power transmission block 100 in its outward appearance.
- the power transmission block 100 '- different from the power transmission block 100 - has partially rounded surfaces (see extension 1 13').
- the power transmission block 100 ' is a flat, elongated article in which two sides are slightly rounded. The other sides (see the directions 109 'and 1 1 1') are flat and flat.
- the cuts 1 19 ', 121' are so wide that they offer a range of motion.
- the power transmission block 100 ' is a continuous, one-piece block, which offers over the cuts 1 19', 121 'twisting possibilities in itself.
- the cuts 1 19 ', 121' are directed to a location 101 '.
- the point 101 ' is a bottleneck.
- the cross-section available for power transmission in the power transmission block 100' is so wide that the maximum expected force to be transmitted can be transmitted without damaging the power transmission block 100.
- the power transmission block 200 ' (see FIG.
- the power transmission block 200 ' is a columnar block that can perform the function of a flexurally elastic joint.
- the flexurally elastic power transmission block 200 has a constriction 201, in which a web 205 is formed. The remaining material of the power transmission block 200 may be slid past the web 205 beyond the bottleneck, because a few millimeters apart, and displaced in the reference position relative to the web 205.
- the Hebelarmprüfmaschine 301 shown in Figure 10, is similar to the Hebelarmprüfmaschine 1 according to Figures 1 to 3.
- the introduction force F E is deviated from the Hebelarmprüfmaschine 1 in the lever arm 325 introduced by a spring system.
- the desired initiating force F E can be determined by adjustments to the control cabinet 307 via the drive spindle 381 including the electromechanical drive therefor (not shown in Figure 10, similar to the electromechanical drive 83 of Figure 1).
- the plane 359 lies in the lever arm 325. In the plane 357, the pivot points of individual bearing joints 369, 371, 373 can be found.
- the lever arm 325 as can also be seen from FIG. 1 to the lever arm 25, is arranged below the traverse 313.
- the gravity side 353, the side closer to the ground, is cantilevered.
- the bearing 367 which carries the lever arm 325 on the traverse 313, is arranged on the side facing away from the test chamber 303 or the furnace 305 side of the lever arm 325.
- the cross member 313 is spaced from the test room 303.
- joints 375, 377 are provided, the z. B. spherical joints 379 or joints such as the block 100 or the block 200 may be.
- the introduction force F E is introduced via the traction means 323, more precisely via a chain, into the lever arm 325. On the other side of the pivot point of the lever arm 325, the force is discharged again as a test force F P.
- the housing 309 is a ground-level housing in which the force is applied from the springs for the test sample. Above the housing 309 is the test chamber 303. Above the test chamber 303 follows the lever arm 325. The bearing 367 for the lever arm 325 is located at an elevated point. The bearing 367 is not on the gravity side 353 but on the side facing the crossbar 313. The crossbar 313 is the transverse running, final component of the located between the pillars workspace with the test room 303. By the traction means 323, the force can be introduced.
- test error in particular a systematic test error of the test system, can be reduced; the measurements become more accurate. Long-term effects are no longer as detrimental as in the previously known testing machines.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE112009005323T DE112009005323B4 (de) | 2009-10-17 | 2009-12-01 | Hebelarmprüfmaschine |
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DE102009049700.5 | 2009-10-17 | ||
DE102009049700A DE102009049700A1 (de) | 2009-10-17 | 2009-10-17 | Hebelarmprüfmaschine |
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CN113029765A (zh) * | 2021-05-10 | 2021-06-25 | 吉林大学 | 准静态原位双轴拉伸性能测试仪器 |
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DE102010040268A1 (de) * | 2010-09-03 | 2012-03-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Kriechprüfstand und Verfahren zu seiner Verwendung |
DE102011054202B4 (de) | 2011-10-05 | 2017-09-21 | Zwick Gmbh & Co. Kg | Prüfstückprüfmaschine mit Mitnehmervorrichtung und Nutzung eines Dehnungsmesssignals einer solchen Prüfstückprüfmaschine |
DE102012012245A1 (de) | 2012-06-22 | 2013-12-24 | Zwick Gmbh & Co. Kg | Ausrichtvorrichtung einer Prüfvorrichtung |
DE102015201993A1 (de) | 2015-02-05 | 2016-08-11 | Zwick Gmbh & Co. Kg | Materialprobenhalter mit Ansteuereinheit |
EP3153839B1 (de) | 2015-10-07 | 2022-06-15 | ZwickRoell GmbH & Co. KG | Temperierkammer einer belastungseinrichtung wie einer säulenmaterialprüfmaschine sowie verfahren zum betrieb einer solchen temperierkammer mit einem element für eine hintergrundbeleuchtung |
DE202015105319U1 (de) | 2015-10-07 | 2017-02-10 | Zwick Gmbh & Co. Kg | Energetisch vorteilhafte Temperierkammer |
EP3285060A1 (de) * | 2016-08-18 | 2018-02-21 | GWP Gesellschaft Für Werkstoffprüfung MbH | Vorrichtung und verfahren zur zugprüfung |
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DE102010037982A1 (de) | 2010-10-05 | 2012-04-05 | Zwick Gmbh & Co. Kg | Probenhalter und Verfahren zum Spannen insbesondere einer länglichen, metallischen Probe |
CN103149094A (zh) * | 2013-03-05 | 2013-06-12 | 华北水利水电学院 | 早期龄混凝土拉伸徐变的测量方法及装置 |
CN103149094B (zh) * | 2013-03-05 | 2015-08-19 | 华北水利水电大学 | 早期龄混凝土拉伸徐变的测量方法 |
CN103674725A (zh) * | 2013-12-12 | 2014-03-26 | 中国建筑股份有限公司 | 一种超低温环境下混凝土劈裂强度试验的装置及试验方法 |
CN108072567A (zh) * | 2017-12-08 | 2018-05-25 | 广州特种承压设备检测研究院 | 一种塑料恒温应力腐蚀实验装置及方法 |
CN112504587A (zh) * | 2020-12-02 | 2021-03-16 | 西安建筑科技大学 | 一种杠杆持荷下的混凝土连续梁桥弯曲徐变应变测试装置与方法 |
CN112504587B (zh) * | 2020-12-02 | 2022-09-16 | 西安建筑科技大学 | 一种杠杆持荷下的混凝土连续梁桥弯曲徐变应变测试装置与方法 |
CN113008679A (zh) * | 2021-03-03 | 2021-06-22 | 上海发电设备成套设计研究院有限责任公司 | 一种基于持久试验的蠕变速率测量方法 |
CN113008679B (zh) * | 2021-03-03 | 2023-03-31 | 上海发电设备成套设计研究院有限责任公司 | 一种基于持久试验的蠕变速率测量方法 |
CN113029765A (zh) * | 2021-05-10 | 2021-06-25 | 吉林大学 | 准静态原位双轴拉伸性能测试仪器 |
Also Published As
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DE112009005323A5 (de) | 2012-07-26 |
DE102009049700A1 (de) | 2011-04-21 |
DE112009005323B4 (de) | 2013-04-18 |
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