CN201016904Y

CN201016904Y - Metal indoor temperature creep test tools

Info

Publication number: CN201016904Y
Application number: CNU2007201410386U
Authority: CN
Inventors: 许树芳; 于江祥; 郭天才; 李文瑛
Original assignee: CASIC Defense Technology Research and Test Center
Current assignee: CASIC Defense Technology Research and Test Center
Priority date: 2007-03-23
Filing date: 2007-03-23
Publication date: 2008-02-06
Anticipated expiration: 2017-03-23

Abstract

The utility model discloses a metal room temperature creep test frock, including an upper splint (1), a lower splint (3), also an anvil platform base (2), an anvil platform (4), a clamp pipe (5) and a locking nut (6). Two groups of the round upper splint (1) and the lower splint (3) respectively clamp flanges on two ends of a creep sample (7) standard distance. The clamp pipe (5) and the anvil platform base (2) are fixed by threads and respectively clamp the two groups of the upper splint (1) and the lower splint (3). The clamp pipe (5) is coaxially fixed to a precise displacement sensor (8), the tip contacts of which are in contact with the plane of the anvil platform (4). When the creep sample (7) extends, the upper splint (1) and the lower splint (3) move with the flanges on two ends of the creep sample (7) standard distance. The precise displacement sensor (8) can measure the extension amount of the creep sample (7). The test frock has the advantages of high precision, small volume and stable working process.

Description

Metal room temperature creep test frock

Technical field

The utility model relates to a kind of test frock, particularly a kind of metal room temperature creep test frock.

Background technology

Traditional creep test adopts the extensometer device, bigger electron drift appears in extensometer long meeting service time, and general room temperature creep test requires more than 1000 hours, so just cause test error bigger, test accuracy is subjected to certain limitation, so the extensometer device is unfavorable for long room temperature creep test; And the extensometer device has only a measured value, because the small displacement of two end boss of creep sample gauge length is easy to be subjected to the deformation effect of anchor clamps etc., if uniaxial tension sample frock is unreasonable or only measure in a side, slight curves deflection on the frock may be exaggerated many, causes the measurement result distortion.

The utility model content

The purpose of this utility model is to provide a kind of metal room temperature creep test frock, solves the electron drift problem of measuring system.

A kind of metal room temperature creep test frock comprises train wheel bridge, lower plate, also comprises anvil seat, anvil, clamp and set nut.The center of circle of two groups of circular train wheel bridges and lower plate all has stepped hole, the diameter in hole and the size of creep sample coupling, the creep sample two ends place the two groups of train wheel bridges of upper-lower position and the stepped hole of lower plate respectively, and train wheel bridge and lower plate are clipped in respectively on two end boss of creep sample gauge length; Symmetry both sides, two groups of train wheel bridge centers all have threaded hole, and the position that lower plate is corresponding with train wheel bridge has through hole; The welding of anvil seat one end and anvil, the other end has connecting thread, and the anvil seat places in the through hole of lower plate and to screw fixingly with the train wheel bridge screw thread, and train wheel bridge and lower plate is compressed; One end of clamp has connecting thread, clamp places in the through hole of lower plate and screws fixing with the train wheel bridge screw thread, and another group train wheel bridge and lower plate compressed, the other end of clamp forms three distinguish after having axisymmetric three grooves, precise displacement sensor places in the clamp, set nut is placed in outside the clamp, there are three distinguish of the hole compressing clamp of tapering set nut inside, clamp precise displacement sensor thus, and making precise displacement sensor and clamp concentric, the tip contact contact of precise displacement sensor is on corresponding anvil plane; The distribution that is centrosymmetric of anvil seat, anvil, clamp, set nut and the precise displacement sensor of another group.Creep sample is done the time spent in tensional load, train wheel bridge, lower plate and on part two end boss of all following the creep sample gauge length move, during the creep sample elongation, precise displacement sensor has just been measured the elongation of creep sample.Adopt two groups of identical clamping plate clampings, centrosymmetric two positions at creep sample are measured simultaneously, the end value that two precise displacement sensors are surveyed is averaged, with mean value as final Displacement Measurement result, can eliminate the defective of clamp fixture itself effectively and measure in the measuring error that causes of asymmetric factor.

The part of this test frock is all made with stainless steel material, and has carried out size stabilization thermal treatment, in long measuring process, has guaranteed the dimensionally stable of frock itself.In addition, the size of test frock itself is less, can together be positioned in the constant temperature oven with tested sample easily, and not take bigger space.

Description of drawings

Fig. 1 metal room temperature creep test tool structure synoptic diagram.

1. train wheel bridge 2. anvil seats 3. lower plates 4. anvils 5. clamps 6. set nuts 7. creep samples 8. precise displacement sensors

Embodiment

Below in conjunction with the drawings and the specific embodiments the utility model is described further.

A kind of metal room temperature creep test frock comprises train wheel bridge 1, lower plate 3, also comprises anvil seat 2, anvil 4, clamp 5 and set nut 6.The center of circle of two groups of circular train wheel bridges 1 and lower plate 3 all has stepped hole, the size coupling of the diameter in hole and creep sample 7, creep sample 7 two ends place the two groups of train wheel bridges 1 of upper-lower position and the stepped hole of lower plate 3, train wheel bridge 1 and lower plate 3 are clipped in respectively on two end boss of creep sample 7 gauge lengths, symmetry both sides, two groups of train wheel bridge 1 centers all have threaded hole, lower plate 3 and train wheel bridge 1 corresponding position has through hole, anvil seat 2 one ends and anvil 4 welding, the other end has connecting thread, anvil seat 4 places in the through hole of lower plate 3 and to screw fixingly with train wheel bridge 1 screw thread, and train wheel bridge 1 and lower plate 3 is compressed; One end of clamp 5 has connecting thread, clamp 5 places in the through hole of lower plate 3 and screws fixing with train wheel bridge 1 screw thread, and another group train wheel bridge 1 and lower plate 3 compressed, the other end of clamp 5 forms three distinguish after having axisymmetric three grooves, precise displacement sensor 8 places in the clamp 5, set nut 6 is placed in outside the clamp 5, there are three distinguish of the hole compressing clamp 5 of tapering set nut 6 inside, clamp precise displacement sensor 8 thus, and making precise displacement sensor 8 and clamp 5 concentrics, the tip contact contact of precise displacement sensor 8 is on corresponding anvil 4 planes; The distribution that is centrosymmetric of the anvil seat 2 of another group, anvil 4, clamp 5, set nut 6 and precise displacement sensor 7.Creep sample 7 is done the time spent in tensional load, and two end boss that the part on train wheel bridge 1, the lower plate is all followed creep sample 7 gauge lengths move, and during creep sample 7 elongations, precise displacement sensor 8 has just been measured the elongation of creep sample 7.Adopt two groups of identical clamping plate clampings, the symmetry bilateral is measured simultaneously at the center of creep sample 7, the end value that two precise displacement sensors 8 are surveyed is averaged, with mean value as final Displacement Measurement result, can eliminate the defective of clamp fixture itself effectively and measure in the measuring error that causes of asymmetric factor.

Claims

1. a metal room temperature creep test frock comprises train wheel bridge (1), lower plate (3), it is characterized in that: also comprise anvil seat (2), anvil (4), clamp (5) and set nut (6); The center of circle of two groups of circular train wheel bridges (1) and lower plate (3) all has stepped hole, the size coupling of the diameter in hole and creep sample (7), creep sample (7) two ends place the two groups of train wheel bridges (1) that are in upper-lower position and the stepped hole of lower plate (3) respectively, train wheel bridge (1) and lower plate (3) are clipped in respectively on two end boss of creep sample (7) gauge length, symmetry both sides, two groups of train wheel bridges (1) center all have threaded hole, the position that lower plate (3) is corresponding with train wheel bridge (1) has through hole, anvil seat (2) one ends and anvil (4) welding, the other end has connecting thread, anvil seat (4) places in the through hole of lower plate (3) and to screw fixingly with train wheel bridge (1) screw thread, and train wheel bridge (1) and lower plate (3) is compressed; One end of clamp (5) has connecting thread, clamp (5) places in the through hole of lower plate (3) and screws fixing with train wheel bridge (1) screw thread, and another group train wheel bridge (1) and lower plate (3) compressed, the other end of clamp (5) forms three distinguish after having axisymmetric three grooves, precise displacement sensor (8) places in the clamp (5), set nut (6) is placed in outside the clamp (5), there is the hole of tapering set nut (6) inside, clamp (5) closely cooperates with precise displacement sensor (8), precise displacement sensor (8) and clamp (5) concentric, the tip contact contact of precise displacement sensor (8) is on corresponding anvil (4) plane.