CN111289363A - Clamp for silicon core pipe tensile test and test method thereof - Google Patents
Clamp for silicon core pipe tensile test and test method thereof Download PDFInfo
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- CN111289363A CN111289363A CN202010171807.7A CN202010171807A CN111289363A CN 111289363 A CN111289363 A CN 111289363A CN 202010171807 A CN202010171807 A CN 202010171807A CN 111289363 A CN111289363 A CN 111289363A
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- silicon core
- central shaft
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- clamp
- core tube
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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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
- G01N3/02—Details
- G01N3/04—Chucks
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- 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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
Abstract
The invention relates to a clamp for a silicon core tube tensile test and a test method thereof, wherein the clamp comprises a connecting part and a clamping part, wherein the connecting part comprises a connecting rod and a connecting hole arranged at one end of the connecting rod; the clamping part comprises a central shaft, a base plate, a plurality of moving blocks, a first clamping piece, a second clamping piece and a driving assembly, wherein the central shaft is arranged at one end, far away from the connecting hole, of the connecting rod, the base plate is arranged at one end, far away from one end of the connecting rod, of the central shaft, the plurality of moving blocks are arranged on the base plate and can move on the base plate in the radial direction of the central shaft, the first clamping piece is fixedly arranged at one end, close to the axis of the central shaft, of the moving block, the second clamping piece is arranged on the. The distance between the first clamping pieces and the second clamping pieces is changed, so that the clamp can clamp silicon core pipes of various specifications and sizes, the silicon core pipes are uniformly stressed under the condition that the clamping force on the silicon core pipes is ensured, and the phenomenon that the side plates of the silicon core pipes are damaged due to overlarge clamping force is reduced.
Description
Technical Field
The invention relates to the technical field of silicon core pipe quality detection equipment, in particular to a clamp for a silicon core pipe tensile test and a test method thereof.
Background
The silicon core pipe is also called as high density polyethylene silicon core pipe, is composed of a high density polyethylene outer layer and a permanent solid silicon inner lubricating layer, is a novel composite pipeline with a silica gel solid lubricant on the inner wall, has good sealing performance, chemical corrosion resistance and low engineering cost, and is widely applied to optical cable communication network systems of highways and railways. The silicon core tube needs to be subjected to quality detection after production, wherein the stretchability of the silicon core tube is a strict requirement in physical performance indexes. At present, a universal tensile testing machine is usually used for performing tensile test on the silicon core tube, and a special clamp is required for mounting the silicon core tube on the universal tensile testing machine.
At present, patent document with publication number CN206945435U discloses a silicon core pipe maximum traction force experiment fixture, which includes a tight extrusion inner sleeve and a circular pulling disk block, wherein the pulling disk block is arranged inside the tight extrusion inner sleeve, a pulling rod is arranged at the upper part of the pulling disk block, and the pulling rod penetrates upwards through the tight extrusion inner sleeve; more than two inner wall arc-shaped clamping jaws are hinged on the inner wall of the tight extrusion inner sleeve; the lifting disc block is positioned between the arc-shaped clamping jaws on the inner wall; when the lifting rod moves upwards, the lifting disc block can push the inner wall arc-shaped clamping jaws outwards, so that the inner wall arc-shaped clamping jaws are outwards propped out to clamp the inner wall of the silicon core pipe.
Although the silicon core pipe maximum traction force experiment clamp can clamp the silicon core pipe tightly, the outer wall clamping jaw and the inner wall arc clamping jaw used for clamping the silicon core pipe can realize the clamping function when the arc radius of the inner wall arc clamping jaw is the same as the radius of the silicon core pipe to be clamped.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a clamp for a silicon core pipe tensile test, which is suitable for silicon core pipes of various specifications and models, enables the silicon core pipes to be stressed uniformly, and reduces the phenomenon that the silicon core pipes are damaged due to overlarge clamping force on the premise of ensuring the clamping of the silicon core pipes.
The invention aims to be realized by the following technical scheme:
a clamp for a silicon core tube tensile test and a test method thereof comprise a connecting part and a clamping part, wherein the connecting part comprises a connecting rod and a connecting hole arranged at one end of the connecting rod; the clamping part comprises a central shaft arranged at one end, far away from the connecting hole, of the connecting rod, a base plate arranged at one end, far away from the connecting rod, of the central shaft, a plurality of moving blocks which are arranged on the base plate and can move on the base plate along the radial direction of the central shaft, a first clamping part fixedly arranged at one end, close to the axis of the central shaft, of each moving block, a second clamping part arranged on each moving block and positioned at one side, far away from the axis of the central shaft, of the first clamping part, and a driving assembly which is arranged on the central shaft and;
the moving blocks are distributed at intervals along the circumferential direction of the central shaft; the second clamping piece can move on the moving block along the radial direction of the central shaft, and a moving assembly is arranged between the second clamping piece and the moving block.
Through adopting above-mentioned technical scheme, the connecting rod cooperates with universal tensile testing machine's keeping silent to be connected anchor clamps whole and universal tensile testing machine. When the clamp is connected with the silicon core pipe, the driving assembly is used for driving the plurality of moving blocks to move towards one side of the axis of the central shaft, the space between the plurality of central shafts is shortened, and the second clamping piece is driven to move towards the direction far away from the first clamping piece through the plurality of moving assemblies in sequence, so that the space between the first clamping piece and the second clamping piece is larger than the wall thickness of the silicon core pipe; then, one end of the silicon core pipe is abutted against the moving blocks, the first clamping pieces are located on the inner side of the silicon core pipe, the second clamping pieces are located on the outer side of the silicon core pipe, the moving blocks move in the opposite direction, the first clamping pieces are attached to the inner side wall of the silicon core pipe, the silicon core pipe is tightly tensioned on the clamp, the second clamping pieces are attached to the outer side wall of the silicon core pipe, the clamping force on the silicon core pipe is further increased, the silicon core pipe is fixed on the clamp, the clamping force on the silicon core pipe is guaranteed, and the side wall of the silicon core pipe cannot be damaged. A plurality of first holders and second holder can remove according to the size of different silicon core pipes to be applicable to the silicon core pipe of multiple model size, improved anchor clamps's practicality.
The present invention in a preferred example may be further configured to: the moving block consists of an outer moving plate, an inner moving plate and a first sliding block arranged between the outer moving plate and the inner moving plate;
the outer moving plate is positioned on one side of the chassis far away from the central shaft and is abutted against the chassis, the first clamping piece is fixedly connected with the outer moving plate, and the second clamping piece slides on the moving plate;
the inner moving plate is positioned on one side of the chassis close to the central shaft and is abutted against the chassis;
set up on the chassis with first slider looks adaptation and along the radial first spout that sets up of center pin, first slider is located first spout and slides, outer movable plate and interior movable plate are all unable to pass first spout.
By adopting the technical scheme, the first sliding block cannot be separated from the first sliding groove under the action of the outer moving plate and the inner moving plate, so that the inner moving plate and the outer moving plate can move along the radial direction of the central shaft together, and can not move along the axial direction of the central shaft due to the tensile force of the universal tensile testing machine.
The present invention in a preferred example may be further configured to: the driving assembly comprises a rotating disc, the rotating disc is sleeved on the central shaft and is in rotating connection with the central shaft, and the rotating disc is in threaded connection with the plurality of inner moving plates through planes.
By adopting the technical scheme, the plurality of inner moving plates are connected with the rotating disc by using the plane threads, when the rotating disc rotates, the inner moving blocks correspondingly move along the radial direction of the rotating disc, the moving distances of the plurality of inner moving plates are ensured to be the same, and the inner moving blocks have self-locking performance, so that the inner moving blocks cannot move due to direct stress, the clamping force on the silicon core pipe is ensured to be unchanged, and the silicon core pipe and the central shaft are better in alignment.
The present invention in a preferred example may be further configured to: one side of the chassis close to the rotating disc is fixedly provided with a protective sleeve, the rotating disc is sleeved in the protective sleeve and is connected with the protective sleeve in a rotating mode, the inner moving plates are located in the protective sleeve, and a plurality of yielding grooves matched with the inner moving plates are formed in the side wall of the protective sleeve.
By adopting the technical scheme, the protective sleeve plays a role in protecting the connection between the rotating disc and the plurality of inner moving plates, so that the plane threads on the rotating disc are not exposed outside, and the stability of the clamp in use is improved.
The present invention in a preferred example may be further configured to: and one end of the rotating disc, which is far away from the chassis, is fixedly provided with a rotating sleeve, and the rotating sleeve is sleeved on the central shaft and is rotationally connected with the central shaft.
Through adopting above-mentioned technical scheme, the measurement personnel can use the rotating sleeve to drive the rolling disc and rotate, and the rotating sleeve has increased the length of holding when measurement personnel rotate the rolling disc, and more convenient laborsaving when making measurement personnel rotate the rolling disc.
The present invention in a preferred example may be further configured to: the first clamping piece is arranged in a cylinder shape, the second clamping piece is also arranged in a cylinder shape, and the axes of the first clamping piece, the second clamping piece and the central shaft are parallel to each other.
Through adopting above-mentioned technical scheme, reduce the area of contact of first holder and second holder and silicon core pipe lateral wall, increase the applicable silicon core pipe size range of anchor clamps.
The present invention in a preferred example may be further configured to: the connecting part further comprises a spherical hinge assembly, the spherical hinge assembly is arranged between the connecting rod and the central shaft, and the central shaft is connected with the connecting rod in a spherical hinge mode and in a detachable mode through the spherical hinge assembly.
Through adopting above-mentioned technical scheme, the center pin can be dismantled with the connecting rod and be connected, make clamping part and connecting portion detachable, at first with connecting portion and omnipotent tensile test machine cooperation back, it is fixed with silicon core pipe again with clamping part, place omnipotent tensile test machine with clamping part and silicon core pipe simultaneously afterwards on, connect the clamping part on connecting portion, simultaneously under the effect of ball pivot subassembly, when making the center pin be connected with the connecting rod, the center pin can and the connecting rod between have certain angular deviation, improve the convenience that anchor clamps used.
The present invention in a preferred example may be further configured to: the spherical hinge assembly comprises a hinge ball fixedly arranged at one end of the connecting rod close to the central shaft, a connecting block arranged between the hinge ball and the central shaft, and a cover body sleeved at one side of the connecting block far away from the central shaft and detachably connected with the connecting block;
the diameter of the hinge ball is larger than that of the connecting rod;
one end of the connecting block, which is close to the hinge ball, is provided with a hemispherical hinge groove, the hinge ball is positioned in the hinge groove and is in spherical hinge connection with the connecting block, and the central shaft is detachably connected with the connecting block;
the cover body is far away from one end of the connecting block and is provided with a through hole, the diameter of the through hole is larger than the diameter of the connecting rod and smaller than the diameter of the hinge ball, the inner side wall of the through hole is arranged to be a spherical surface, and the hinge ball is abutted to the inner side wall of the through hole.
By adopting the technical scheme, after the connecting rod is matched with the jaw of the universal tensile testing machine, when the connecting part is matched with the clamping part, the connecting block can rotate in a certain range along the ball of the hinged ball, so that the angle deviation between the connecting rod and the central shaft is reduced when the clamping part is connected with the connecting part, and the convenience of installing the silicon core pipe on the universal tensile testing machine by a detector is improved.
The present invention in a preferred example may be further configured to: the connecting block is close to the one end of center pin and has been seted up the joint groove, the one end that the center pin is close to the connecting block has set firmly the joint piece, the center pin passes through the joint piece and can dismantle with the connecting block in joint groove and be connected.
Through adopting above-mentioned technical scheme, joint piece and joint groove make the better convenience of dismantlement between center pin and the connecting block to when having guaranteed that the silicon core pipe receives the pulling force, the stability of being connected between center pin and the connecting block.
The invention also aims to provide a silicon core pipe tensile test method, which is convenient for installing the silicon core pipe on a universal tensile test machine, enables the silicon core pipe to keep stable in the tensile process and improves the data precision of measurement in the silicon core pipe test.
The technical purpose of the invention is realized by the following technical scheme:
a silicon core pipe tensile test method comprises the clamp for the silicon core pipe tensile test, and comprises the following steps:
A. preparing a silicon core tube to be tested, taking out a pair of clamps, and separating a connecting part and a clamping part in the clamps;
B. respectively fixing the connecting parts in the two clamps at the upper jaw and the lower jaw of the universal tensile testing machine;
C. respectively fixing the clamping parts of the two clamps to two ends of the silicon core pipe;
D. placing the silicon core tube and two clamping parts connected with the two ends of the silicon core tube on a universal tensile testing machine, enabling the two clamping parts to correspond to the two connecting parts, and connecting the clamping parts with the connecting parts;
E. and starting the universal tensile testing machine, gradually increasing the tensile force on the silicon core pipe, penetrating through the change of the silicon core pipe and recording the tensile force value until the silicon core pipe deforms or breaks.
By adopting the technical scheme, the silicon core tube tensile test device is suitable for silicon core tubes with various specifications and sizes, is simple and convenient in operation process, enables the stress direction of the silicon core tube to be better, and improves the reliability of the silicon core tube tensile test data. And the clamp makes the lateral wall atress of silicon core pipe even under the prerequisite of guaranteeing to press from both sides tight silicon core pipe, reduces the silicon core pipe atress too big and the phenomenon that appears damaging appears, and through the cooperation of connecting portion and clamping part, it is more convenient when making the testing personnel put into universal tensile testing machine with the silicon core pipe.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the distance between the first clamping pieces and the second clamping pieces is changed, so that the clamp can clamp silicon core pipes with various specifications and sizes, the silicon core pipes are uniformly stressed under the condition of ensuring the clamping force on the silicon core pipes, and the phenomenon that the side plates of the silicon core pipes are damaged due to overlarge clamping force is reduced;
2. the plurality of inner moving plates move according to the rotation of the rotating disc in a plane threaded connection mode, and the self-locking property is realized, so that the inner moving plates cannot be reversely driven by an external force factor to rotate the rotating disc, the stability of the clamp in the use process is ensured, the alignment of the silicon core pipe and the central shaft is improved, and the stress direction of the silicon core pipe is better when the silicon core pipe is stretched;
3. under the effect through the ball pivot subassembly, make center pin and connecting rod both can dismantle the connection and the ball pivot is connected, connecting portion and clamping part detachable when can dismantle the connection, with connecting portion and universal tensile testing machine cooperation back earlier, again with clamping part and silicon core pipe cooperation, at last with clamping part and connecting portion combination, can have the deviation on the certain angle when making center pin and connecting rod be connected under the effect of ball pivot subassembly simultaneously, it is more convenient when making the testing personnel install the silicon core pipe.
Drawings
FIG. 1 is a schematic structural diagram of a clamp for a silicon core tube tensile test;
FIG. 2 is a schematic view showing a mechanism of the clamping portion;
FIG. 3 is a sectional view showing the internal structure of the driving assembly;
FIG. 4 is a sectional view showing the connecting portion;
FIG. 5 is an exploded view showing the connection of the connecting portions;
FIG. 6 is a schematic view showing the mechanism after the connecting portion and the holding portion are separated;
fig. 7 is a schematic view showing a structure in which a silicon core tube is mounted between two jigs.
In the figure, 1, connecting rod; 11. connecting holes; 2. a central shaft; 21. a chassis; 211. a first chute; 22. a clamping block; 3. a moving block; 31. an outer moving plate; 311. a second chute; 32. an inner moving plate; 33. a first slider; 4. a first clamping member; 5. a second clamping member; 51. a moving assembly; 511. a second slider; 512. a screw; 6. a drive assembly; 61. rotating the disc; 62. rotating the sleeve; 63. a protective sleeve; 631. a yielding groove; 7. a spherical hinge assembly; 71. hinging the ball; 72. connecting blocks; 721. a hinge slot; 722. a clamping groove; 73. a cover body; 731. and a through hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The clamp for the silicon core tube tensile test comprises a connecting part and a clamping part, wherein the connecting part is matched with a jaw of a universal tensile testing machine, the clamping part is matched with a silicon core tube 8, and the connecting part is detachably connected with the clamping part. When the silicon core tube 8 is subjected to a tensile test, the clamps are used in pairs, after the connecting parts and the clamping parts in the two clamps are separated, the two connecting parts are respectively and oppositely arranged at the upper jaw and the lower jaw of the universal tensile testing machine, the two clamping parts are respectively fixed at the two ends of the silicon core tube 8, and finally the two clamping parts are matched with the two connecting parts one by one to fix the silicon core tube 8 on the universal tensile testing machine.
Referring to fig. 1, connecting portion include connecting rod 1, and connecting rod 1 is the cylinder setting, and connecting hole 11 has been seted up to the one end of connecting rod 1, and connecting hole 11 sets up along connecting rod 1's radial, connecting rod 1 and connecting hole 11 and universal tensile testing machine's the looks adaptation of keeping silent.
Referring to fig. 1 and 2, the clamping portion includes a central shaft 2, the central shaft 2 is disposed on a side of the connecting rod 1 away from the connecting hole 11, and an axis of the central shaft 2 coincides with an axis of the connecting rod 1. The end of the central shaft 2 far away from the connecting rod 1 is fixedly provided with a chassis 21, the chassis 21 is in a disc shape, and the axis of the chassis 21 coincides with the axis of the central shaft 2. One side that center pin 2 was kept away from to chassis 21 is equipped with three movable block 3, and three movable block 3 is connected with chassis 21 slides along the circumference evenly distributed of chassis 21, makes movable block 3 can follow the radial movement of chassis 21, and still is equipped with drive assembly 6 on the center pin 2, and drive assembly 6 is used for driving three movable block 3 synchronous motion.
Referring to fig. 2, the moving block 3 is composed of an outer moving plate 31, an inner moving plate 32, and a first slider 33. Outer moving plate 31 is provided along the radial direction of chassis 21, outer moving plate 31 is located on the side of chassis 21 away from central axis 2, and outer moving plate 31 is parallel to chassis 21 and abuts against it. The inner moving plate 32 is parallel to the outer moving plate 31, the inner moving plate 32 is located on the side of the chassis 21 close to the central axis 2, and the inner moving plate 32 abuts against the chassis 21, i.e. the chassis 21 is located between the outer moving plate 31 and the inner moving plate 32. Three first sliding grooves 211 are formed in the base plate 21, the three first sliding grooves 211 correspond to the three moving blocks 3 one by one, and the first sliding grooves 211 are arranged along the radial direction of the base plate 21. The first sliding block 33 is matched with the first sliding groove 211, the first sliding block 33 is located in the first sliding groove 211 to slide, one end of the first sliding block 33 in the axial direction of the central shaft 2 is fixedly connected with the outer moving plate 31, and the other end of the first sliding block 33 is fixedly connected with the inner moving plate 32, so that the cross section of the moving block 3 is arranged in an I shape, and the moving block 3 can only move along the length direction of the first sliding groove 211.
Referring to fig. 1 and 2, a first clamping member 4 is fixedly arranged on the side surface of the outer moving plate 31 away from the chassis 21, the first clamping member 4 is located at one end of the outer moving plate 31 close to the axis of the central shaft 2, that is, the number of the first clamping members 4 is three, the three first clamping members 4 are in one-to-one correspondence with the three moving blocks 3, the first clamping members 4 are arranged in a cylindrical manner, and the axis of the first clamping members 4 is parallel to the axis of the central shaft 2. One side that first holder 4 kept away from center pin 2 axis is equipped with second holder 5, and the quantity of second holder 5 also sets up to three promptly, and three second holder 5 and three first holder 4 one-to-one, second holder 5 and outer movable plate 31 slide and be connected. The second clamping member 5 is also arranged in a cylinder shape, the axis of the second clamping member 5 is parallel to the axis of the first clamping member 4, the corresponding first clamping member 4, second clamping member 5, moving block 3 and first sliding groove 211 are all located in the same radial direction of the chassis 21, and the second clamping member 5 can move along the radial direction.
Referring to fig. 2 and 3, the outer moving plate 31 is provided with a moving assembly 51, and the moving assembly 51 can drive the second clamping member 5 to move along the radial direction of the chassis 21. The moving assembly 51 includes a second sliding block 511, the cross section of the second sliding block 511 is arranged in a T shape, a second sliding slot 311 matched with the second sliding block 511 is formed on the outer moving plate 31, that is, the second sliding slot 311 is arranged in a T-shaped slot, the second sliding slot 311 is arranged along the length direction of the first sliding slot 211, the second sliding block 511 is located in the second sliding slot 311 to slide, and the second sliding block 511 passes through the second sliding slot 311 and is fixedly connected with one end of the second clamping member 5. A screw 512 is rotatably connected in the second sliding slot 311, the screw 512 is arranged along the length direction of the second sliding slot 311, and the screw 512 penetrates through the second sliding block 511 and is in threaded connection with the second sliding block. By rotating the screw 512, the screw 512 drives the second sliding block 511 to move along the second sliding slot 311, so that the second sliding block 511 drives the second clamping member 5 to move close to or away from the first clamping member 4.
Referring to fig. 3, the driving assembly 6 includes a rotating disc 61, the rotating disc 61 is located on a side of the inner moving plate 32 away from the chassis 21, and the rotating disc 61 is sleeved on the central shaft 2 and rotatably connected therewith. The side surface of the rotating disc 61 close to the three inner moving plates 32 is provided with a plane thread, the three inner moving plates 32 are in threaded connection with the rotating disc 61 through the plane thread, and when the rotating disc 61 rotates, the three inner moving plates 32 can be driven to synchronously move. One side of the rotating disc 61, which is far away from the chassis 21, is fixedly provided with a rotating sleeve 62, the rotating sleeve 62 is sleeved on the outer peripheral surface of the central shaft 2 and is rotatably connected with the central shaft, and a detector can hold the rotating sleeve 62 by hand and drive the rotating disc 61 to rotate through the rotating sleeve 62.
Referring to fig. 3, a protection sleeve 63 is arranged on one side of the chassis 21 close to the rotating disc 61, the axis of the protection sleeve 63 coincides with the axis of the chassis 21, the protection sleeve 63 is fixedly connected with the chassis 21, and the rotating disc 61 is sleeved on the inner side of the protection sleeve 63 and is rotatably connected with the protection sleeve 63. The protection sleeve 63 protects the planar threads inside the rotating disc 61, three abdicating grooves 631 matched with the inner moving plate 32 are formed in the outer peripheral surface of the protection sleeve 63, and the three abdicating grooves 631 correspond to the three inner moving plates 32 one to one, so that the protection sleeve 63 does not interfere with the displacement of the inner moving plates 32.
Referring to fig. 4 and 5, the connecting portion further includes a spherical hinge assembly 7, the spherical hinge assembly 7 is disposed between the connecting rod 1 and the central shaft 2, and the connecting rod 1 is connected with the central shaft 2 through the spherical hinge assembly 7 in a detachable manner and also connected in a spherical hinge manner, so that the connecting portion and the clamping portion are more convenient to connect. The spherical hinge assembly 7 comprises a hinge ball 71, the hinge ball 71 is fixedly arranged at one end of the connecting rod 1 far away from the connecting hole 11, the spherical center of the hinge ball 71 is positioned on the axis of the connecting rod 1, and the diameter of the hinge ball 71 is larger than that of the connecting rod 1. The connecting block 72 is arranged at one end, away from the connecting rod 1, of the hinge ball 71, the connecting block 72 is arranged in a cylindrical shape, the axis of the connecting block 72 coincides with the axis of the connecting rod 1, a hinge groove 721 is formed in one end, close to the hinge ball 71, of the connecting block 72, the hinge groove 721 is arranged in a hemispherical shape, and the hinge ball 71 is located in the hinge groove 721 and is in spherical hinge fit with the connecting block 72.
Referring to fig. 4 and 5, a cover 73 is disposed on one side of the connecting block 72 close to the hinge ball 71, the cover 73 is a sleeve with a closed end, an open end of the cover 73 is sleeved on an outer peripheral surface of the connecting block 72 and is in threaded connection with the connecting block, a through hole 731 is disposed at a closed end of the cover 73, a diameter of the through hole 731 is larger than a diameter of the connecting rod 1 and smaller than a diameter of the hinge ball 71, an inner side wall of the through hole 731 is a spherical surface, the connecting rod 1 passes through the through hole, the outer peripheral surface of the hinge ball 71 abuts against the inner side wall of the through hole 731, and the hinge ball 71 cannot be separated from the hinge slot 721 under the action of the blocking sleeve and the through.
Referring to fig. 6, joint groove 722 has been seted up to connecting block 72 one end of keeping away from connecting rod 1, and joint groove 722 is the setting of T type, and the one end that center pin 2 is close to connecting block 72 sets firmly joint piece 22 with joint groove 722 looks adaptation, and joint piece 22 also is the setting of T type promptly, and the axis of center pin 2 coincides with the axis of connecting rod 1 when joint piece 22 is located joint groove 722 to still can dismantle when making connecting rod 1 and chassis 21 be the ball pivot and be connected. After the connecting part is matched with the universal tensile testing machine through the spherical hinge connection, the clamping part and the connecting part can have certain angle deviation with the diameter of the connecting rod 1 when being combined, so that a tester can more conveniently place the silicon core pipe 8 on the universal tensile testing machine.
Referring to fig. 6 and 7, when the clamping part and the silicon core tube 8 are fixed, the driving assembly 6 drives the three moving plates at the same time to drive the first clamping part 4 and the second clamping part 5 to move to one side close to the axis of the central shaft 2, so that the distance between the first clamping part 4 and the axis of the central shaft 2 is smaller than the radius of the inner side wall of the silicon core tube 8; then, the three screws 512 are rotated to adjust the distance between the first clamping piece 4 and the second clamping piece 5, so that the distance between the first clamping piece 4 and the second clamping piece 5 is larger than the wall thickness of the silicon core tube 8; then, one end of the silicon core tube 8 is abutted against the surfaces of the three outer moving plates 31, the three first clamping pieces 4 are positioned on the inner side of the silicon core tube 8, and the three second clamping pieces 5 are positioned on the outer side of the silicon core tube 8; and finally, moving the three moving plates again to enable the moving plates to drive the first clamping pieces 4 to move towards the direction far away from the axis of the central shaft 2 until the first clamping pieces 4 are tightly attached to the inner side wall of the silicon core tube 8, then sequentially rotating the three screw rods 512 to enable the second clamping pieces 5 to be tightly attached to the outer side wall of the silicon core tube 8, and connecting the silicon core tube 8 with the clamping parts under the combined action of the three first clamping pieces 4 and the three second clamping pieces 5.
According to the clamp for the silicon core tube tensile test, the three movable first clamping pieces 4 and the three second clamping pieces 5 corresponding to the three first clamping pieces 4 are matched for use, so that the clamp is convenient to be matched with the silicon core tubes 8 for use, is suitable for the silicon core tubes 8 of various sizes, is simple and convenient to use and compact in structure, and improves the convenience of a tester for the tensile test of the silicon core tubes 8.
A silicon core tube tensile test method using the special fixture for the middle silicon core tube test comprises the following steps:
A. preparing a silicon core tube 8 to be measured, taking out a pair of clamps, and taking out the clamping block 22 in each clamp from the clamping groove 722 to separate a connecting part and a clamping part of the clamp;
B. respectively installing the connecting rods 1 of the two connecting parts at the upper jaw and the lower jaw of the universal tensile testing machine, so that the two connecting parts are oppositely arranged;
C. the two clamping parts are respectively fixed with two ends of a silicon core tube 8, so that three first clamping pieces 4 of the clamp are tightly tensioned on the inner side wall of the silicon core tube 8, and then three second clamping pieces 5 are tightly attached to the outer side wall of the silicon core tube 8;
D. the two clamping parts correspond to the two connecting parts, the clamping blocks 22 on the corresponding clamping parts are matched with the clamping grooves 722 on the connecting parts, the clamping parts are connected with the connecting parts, and the silicon core tube 8 is positioned between an upper jaw and a lower jaw of the universal tensile testing machine, so that the installation work of the silicon core tube 8 is completed;
E. and starting the universal tensile testing machine, gradually increasing the tensile force on the silicon core pipe 8, and recording the corresponding state of the silicon core pipe 8 until the silicon core pipe 8 deforms or breaks, thereby completing the tensile test on the silicon core pipe 8.
The method is used for carrying out the tensile test on the silicon core pipe 8, is suitable for the silicon core pipes 8 with various specifications and sizes, is simple and convenient in operation process, enables the side wall of the silicon core pipe 8 to be stressed uniformly on the premise that the silicon core pipe 8 is clamped tightly by the clamp, reduces the phenomenon that the silicon core pipe 8 is damaged due to overlarge stress, and enables a detector to be more convenient and faster to place the silicon core pipe 8 into the universal tensile testing machine through the matching of the connecting part and the clamping part.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A clamp for a silicon core tube tensile test comprises a connecting part and a clamping part, wherein the connecting part comprises a connecting rod (1) and a connecting hole (11) formed in one end of the connecting rod (1); the method is characterized in that: the clamping part comprises a central shaft (2) arranged at one end, far away from the connecting hole (11), of the connecting rod (1), a base plate (21) arranged at one end, far away from the connecting rod (1), of the central shaft (2), a plurality of moving blocks (3) which are arranged on the base plate (21) and can move on the base plate (21) along the central shaft (2) in the radial direction, a first clamping part (4) fixedly arranged at one end, close to the axis of the central shaft (2), of each moving block (3), a second clamping part (5) arranged on each moving block (3) and located at one side, far away from the axis of the central shaft (2), of each first clamping part (4), and a driving assembly (6) which is arranged on the central shaft (2) and drives the plurality of moving;
the moving blocks (3) are distributed at intervals along the circumferential direction of the central shaft (2); the second clamping piece (5) can move on the moving block (3) along the radial direction of the central shaft (2), and a moving assembly (51) is arranged between the second clamping piece (5) and the moving block (3).
2. The clamp for the silicon core tube tensile test according to claim 1, wherein: the moving block (3) consists of an outer moving plate (31), an inner moving plate (32) and a first sliding block (33) arranged between the outer moving plate (31) and the inner moving plate (32);
the outer moving plate (31) is positioned on one side, away from the central shaft (2), of the chassis (21) and is abutted against the chassis (21), the first clamping piece (4) is fixedly connected with the outer moving plate (31), and the second clamping piece (5) slides on the moving plate;
the inner moving plate (32) is positioned on one side of the chassis (21) close to the central shaft (2) and is abutted against the chassis (21);
set up on chassis (21) with first slider (33) looks adaptation and along first spout (211) of center pin (2) radial setting, first slider (33) are located first spout (211) and slide, outer movable plate (31) and interior movable plate (32) can not pass first spout (211).
3. The clamp for the silicon core tube tensile test according to claim 2, wherein: drive assembly (6) include rolling disc (61), rolling disc (61) cover is established on center pin (2) and is connected rather than rotating, rolling disc (61) pass through plane threaded connection with a plurality of interior movable plates (32).
4. The clamp for the silicon core tube tensile test according to claim 3, wherein: one side that chassis (21) are close to rolling disc (61) has set firmly protective sleeve (63), rolling disc (61) cover is established and is connected rather than rotating in protective sleeve (63), and is a plurality of interior movable plate (32) are located protective sleeve (63), set up a plurality of and interior movable plate (32) looks adaptation on the lateral wall of protective sleeve (63) groove (631) of stepping down.
5. The clamp for the silicon core tube tensile test according to claim 3, wherein: one end of the rotating disc (61) far away from the chassis (21) is fixedly provided with a rotating sleeve (62), and the rotating sleeve (62) is sleeved on the central shaft (2) and is rotationally connected with the central shaft.
6. The clamp for the silicon core tube tensile test according to claim 1, wherein: the first clamping piece (4) is arranged in a cylinder shape, the second clamping piece (5) is also arranged in a cylinder shape, and the axes of the first clamping piece (4), the second clamping piece (5) and the central shaft (2) are parallel to each other.
7. The clamp for the silicon core tube tensile test according to any one of claims 1 to 6, wherein: the connecting part further comprises a spherical hinge assembly (7), the spherical hinge assembly (7) is arranged between the connecting rod (1) and the central shaft (2), and the central shaft (2) is connected with the connecting rod (1) in a spherical hinge mode through the spherical hinge assembly (7) and can be detached.
8. The clamp for the silicon core tube tensile test according to claim 7, wherein: the spherical hinge assembly (7) comprises a hinge ball (71) fixedly arranged at one end of the connecting rod (1) close to the central shaft (2), a connecting block (72) arranged between the hinge ball (71) and the central shaft (2), and a cover body (73) which is sleeved at one side of the connecting block (72) far away from the central shaft (2) and is detachably connected with the connecting block;
the diameter of the hinge ball (71) is larger than that of the connecting rod (1);
one end, close to the hinge ball (71), of the connecting block (72) is provided with a hemispherical hinge groove (721), the hinge ball (71) is positioned in the hinge groove (721) and is in spherical hinge connection with the connecting block (72), and the central shaft (2) is detachably connected with the connecting block (72);
through-hole (731) have been seted up to the one end that connecting block (72) were kept away from in lid (73), the diameter of through-hole (731) is greater than connecting rod (1) diameter and is less than hinge ball (71) diameter, the inside wall of through-hole (731) is established to the sphere, hinge ball (71) and through-hole (731) inside wall are inconsistent.
9. The clamp for the silicon core tube tensile test and the test method thereof according to claim 8, wherein: joint groove (722) have been seted up to connecting block (72) one end near center pin (2), the one end that center pin (2) are close to connecting block (72) has set firmly joint piece (22), center pin (2) can be dismantled with connecting block (72) through joint piece (22) and joint groove (722) and be connected.
10. A silicon core tube tensile test method, characterized in that the clamp for the silicon core tube (8) tensile test comprises any one of the above claims 1 to 9, and comprises the following steps:
A. preparing a silicon core tube (8) to be tested, taking out a pair of clamps, and separating a connecting part and a clamping part in the clamps;
B. respectively fixing the connecting parts in the two clamps at the upper jaw and the lower jaw of the universal tensile testing machine;
C. fixing the clamping parts of the two clamps to two ends of a silicon core pipe (8) respectively;
D. placing the silicon core tube (8) and two clamping parts connected with the two ends of the silicon core tube on a universal tensile testing machine, enabling the two clamping parts to correspond to the two connecting parts, and connecting the clamping parts with the connecting parts;
E. and starting the universal tensile testing machine, gradually increasing the tensile force on the silicon core pipe (8), penetrating through the change of the silicon core pipe (8), and recording the tensile force value until the silicon core pipe (8) deforms or breaks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010171807.7A CN111289363A (en) | 2020-03-12 | 2020-03-12 | Clamp for silicon core pipe tensile test and test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010171807.7A CN111289363A (en) | 2020-03-12 | 2020-03-12 | Clamp for silicon core pipe tensile test and test method thereof |
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| Publication Number | Publication Date |
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| CN111289363A true CN111289363A (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010171807.7A Pending CN111289363A (en) | 2020-03-12 | 2020-03-12 | Clamp for silicon core pipe tensile test and test method thereof |
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| CN (1) | CN111289363A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323928A (en) * | 2021-12-31 | 2022-04-12 | 浙江华南仪器设备有限公司 | Universal testing machine with clamping function |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012052938A (en) * | 2010-09-02 | 2012-03-15 | Shimadzu Corp | Shaft centering device for material testing machine |
| CN103674695A (en) * | 2013-12-09 | 2014-03-26 | 浙江大学 | Tensile test clamp for high-pressure hydrogen environment material testing machine |
| CN204831900U (en) * | 2015-06-05 | 2015-12-02 | 葛洲坝集团试验检测有限公司 | Steel bar anchoring board tensile test auxiliary device |
| CN205362727U (en) * | 2015-12-18 | 2016-07-06 | 浙江万丰科技开发股份有限公司 | Large -scale three -jaw chuck rotary fixture |
| CN205538622U (en) * | 2016-01-19 | 2016-08-31 | 银邦金属复合材料股份有限公司 | Tensile experimental mould of combined material sample bonding |
| CN205826421U (en) * | 2016-07-06 | 2016-12-21 | 河南理工大学 | A kind of device measuring rocks in direct tension mechanics parameter |
| CN206945435U (en) * | 2017-06-15 | 2018-01-30 | 山东铁正工程试验检测中心有限公司 | Silicone pipes maximum drawbar pull laboratory holder |
| CN108896257A (en) * | 2018-08-09 | 2018-11-27 | 华南理工大学 | It is a kind of multi-functional without interconnecting piece flexural pivot test tool |
| CN209407460U (en) * | 2018-12-25 | 2019-09-20 | 平湖市众川机械有限公司 | A kind of scroll chuck of nip cylinders shape workpiece |
-
2020
- 2020-03-12 CN CN202010171807.7A patent/CN111289363A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012052938A (en) * | 2010-09-02 | 2012-03-15 | Shimadzu Corp | Shaft centering device for material testing machine |
| CN103674695A (en) * | 2013-12-09 | 2014-03-26 | 浙江大学 | Tensile test clamp for high-pressure hydrogen environment material testing machine |
| CN204831900U (en) * | 2015-06-05 | 2015-12-02 | 葛洲坝集团试验检测有限公司 | Steel bar anchoring board tensile test auxiliary device |
| CN205362727U (en) * | 2015-12-18 | 2016-07-06 | 浙江万丰科技开发股份有限公司 | Large -scale three -jaw chuck rotary fixture |
| CN205538622U (en) * | 2016-01-19 | 2016-08-31 | 银邦金属复合材料股份有限公司 | Tensile experimental mould of combined material sample bonding |
| CN205826421U (en) * | 2016-07-06 | 2016-12-21 | 河南理工大学 | A kind of device measuring rocks in direct tension mechanics parameter |
| CN206945435U (en) * | 2017-06-15 | 2018-01-30 | 山东铁正工程试验检测中心有限公司 | Silicone pipes maximum drawbar pull laboratory holder |
| CN108896257A (en) * | 2018-08-09 | 2018-11-27 | 华南理工大学 | It is a kind of multi-functional without interconnecting piece flexural pivot test tool |
| CN209407460U (en) * | 2018-12-25 | 2019-09-20 | 平湖市众川机械有限公司 | A kind of scroll chuck of nip cylinders shape workpiece |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323928A (en) * | 2021-12-31 | 2022-04-12 | 浙江华南仪器设备有限公司 | Universal testing machine with clamping function |
| CN114323928B (en) * | 2021-12-31 | 2022-09-09 | 浙江华南仪器设备有限公司 | Universal testing machine with clamping function |
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Application publication date: 20200616 |