CN211179394U - Four-axis centering adjustment system for biaxial tensile testing machine - Google Patents
Four-axis centering adjustment system for biaxial tensile testing machine Download PDFInfo
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- CN211179394U CN211179394U CN201922118122.1U CN201922118122U CN211179394U CN 211179394 U CN211179394 U CN 211179394U CN 201922118122 U CN201922118122 U CN 201922118122U CN 211179394 U CN211179394 U CN 211179394U
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Abstract
The utility model relates to a four-axis centering adjustment system for biax tensile test machine, testing machine technical field. The centering and feedback device is arranged on the main shaft loading chain, the main shaft loading chain is arranged on the rack, and the detection and feedback mechanism is arranged on the rack and used for detecting and controlling the adjustment amount. Has the advantages that: the adjustment of five degrees of freedom can be realized, and the precision is correspondingly matched with the detection device; the utility model discloses be connected with complete machine loading chain, the intensity that has improved whole device reduces the destruction to the loading axle, and system adaptation nature is strong, can match different forms's loading chain and polytype anchor clamps, and the space occupies for a short time, easy operation, and repeated adjustment precision is high, improves the experiment precision, makes measured data more accurate.
Description
Technical Field
The utility model relates to a testing machine technical field, in particular to four-axis centering adjustment system for biax tensile testing machine. The coaxiality of the loading chain can be calibrated on a testing machine.
Background
With the development of economy and the progress of science and technology, the tester industry is developed vigorously like the spring bamboo shoots after rain, various testers with different purposes are continuously emerged, the tester can measure the mechanical property, the process property, the internal defect, the dynamic unbalance amount of the checking rotating part and the like of materials, and the tester is more and more widely applied to the fields of the mechanical industry and the like. The traditional coaxiality adjusting mode of the testing machine is manual adjustment, but the manual adjustment is low in efficiency, different in standard and limited in adjusting amount, and the testing machine is easy to damage, the precision does not reach the standard, the stability is poor and the like.
Disclosure of Invention
An object of the utility model is to provide a four-axis centering adjustment system for biax tensile testing machine has solved current biax testing machine loading chain axiality and has need dismantle the loading chain, the problem that can not adjust in real time, and has filled prior art's blank to a certain extent. The utility model provides a manual assembly adjustment precision uncontrollable, realized that the adjustment once can, stability is good need not repeated adjustment reliability high, carries out the graduation to the adjusting spindle simultaneously, makes the adjustment volume reach 0.01mm, and the control range is big (+/-0.5 mm), and angle adjustment spherical radius reaches the loading test piece center on the matrix, can make angle of adjustment be 0.35; the double-shaft centering sensor is designed, 5 degrees of freedom such as coaxiality, angle and torsion of the loading chain can be identified, the perpendicularity of the two shafts in the orthogonal direction and the planeness formed by the axes can be analyzed, and the detection precision is 0.01 mm; a coarse adjustment device (a support frame and a V-shaped block) is designed, the first coarse adjustment device is used for limiting and preventing the overload of a loading shaft from generating danger, and the second coarse adjustment device is used for installing the support frame and the V-shaped block in a split mode and can coarsely adjust four freedom directions of a loading chain (two freedom degrees of the support frame and two freedom degrees of the V-shaped block); the centering device and the clamp are in threaded connection and combination to realize adjustment of five degrees of freedom (two degrees of freedom of a loading chain installation orthogonal plane, two degrees of freedom of rotation and axial rotation of the loading chain), so that adjustment of any angle and direction on the loading chain can be realized; a profiling wedge clamp is designed, the clamping area is increased, the clamping mode is adjusted to enable the clamping force of a test piece with the same size to be larger, and the loading force is also larger (the friction force of the traditional wedge and the test piece is changed into the adhesive force of the wedge and the test piece and the strength of a wedge material; the quick-wear parts and the parts with high positioning precision requirements in the adjusting device are designed in a standardized manner, and the important parts adopt the easy-to-machine parts and the standard parts of the rotary parts, so that the loss is reduced, the service life of the device is prolonged, and the rigidity of the whole device is not influenced; the device is connected with a whole machine loading chain, the strength of the whole device is improved, the damage and the deformation to a loading shaft are reduced, meanwhile, the adjusting block is fixedly connected with a parent body, the single loading of the adjusting block is changed into the loading of the whole loading chain, the inner part of the adjusting block is connected by a flange, meanwhile, the centering gap in the loading chain is eliminated, the rigidity of the adjusting device has no influence on the rigidity of the whole machine system, meanwhile, the adjusting module is fixedly connected with the whole machine loading chain, the external force borne by the adjusting device is borne by the whole machine, the strength of the device is improved, and the rigidity of the device is increased by installing the adjusting module on the same parent body, so that the device is more; the utility model provides a centering device suitability is strong, and the size through adjustment parent and other parts is used for installing the loading chain of different footpaths and match polytype anchor clamps, and the space occupies for a short time, easy operation, and repeated adjustment precision is high, improves the experiment precision, makes measured data more accurate.
The above object of the utility model is realized through following technical scheme:
a four-axis centering adjustment system for biax tensile testing machine, including main shaft loading chain, centering adjusting device, centering sensor and feedback device, frame, centering adjusting device installs on main shaft loading chain, and main shaft loading chain installs in the frame, detects and feedback mechanism installs and detects and control the adjustment volume in the frame.
The main shaft loading chain is as follows: the electric actuating cylinder 1 is arranged on the supporting block 19, the parent body 2 of the centering adjusting device is in threaded connection with the output shaft of the electric actuating cylinder 1, the angle adjusting shaft 5 of the centering adjusting device is arranged on the parent body 2, the force sensor 9 is arranged on the sensor connecting shaft 7, and the force sensor 9 is positioned on the sensor connecting shaft 7 through a cylindrical pin; the guide shaft 11 is screwed into the force sensor 9, the locking ring 10 is sleeved at the connecting shaft neck of the guide shaft 11, the guide shaft 11 is installed on a guide shaft slide block 22, the guide shaft slide block 22 is installed on a V-shaped block 23, the V-shaped block 23 is installed on a backing plate 24, the backing plate 24 is installed on a support frame 20, the clamp 14 is installed on the pull rod 13 through a pull rod bolt 12, the clamp wedge block 15 is installed on the clamp 14, and the test piece 16 is installed in the clamp 14.
The centering adjusting device is as follows: the matrix 2 is arranged on an output shaft of the electric actuating cylinder through a threaded shaft, the fixing ring 4 is arranged on the matrix 2 through a fixing ring mounting bolt 17, the four angle adjusting bolts 3 are arranged on the fixing ring 4, the angle adjusting shaft 5 is in threaded connection with the matrix 2, the sensor connecting shaft 7 is in threaded connection with the angle adjusting shaft 5 through a threaded output shaft, and the coaxial adjusting bolt 6 is arranged on the angle adjusting shaft 5; the force sensor 9 is installed on the sensor connecting shaft 7 through a sensor connecting bolt 8, the V-shaped block 23 is installed on the support frame 20, and the support frame 20 is installed on the support plate 18.
The centering sensor and the feedback device are as follows: the force sensor 9 is installed on a loading chain, the host and the processor are connected with the force sensor 9 through a USB data line and installed on the rack, the grating ruler on the electric actuating cylinder 1 outputs displacement information to be transmitted to the host, the centering sensor 25 is installed on the loading chain, and the centering sensor 25 is formed by pasting strain rosettes and strain gauges on the test piece 16.
The electric actuating cylinder 1 adopts a folding type electric cylinder CDJ2D16-100Z-M9B-B, and the stroke of the electric cylinder is 100 mm.
The six-dimensional force sensor adopts HBM-U10M, and the maximum measuring range of the force sensor is 125 KN.
The grating ruler adopts Heidenhain-Aelb-382c, and the maximum measuring range of the grating ruler is 250 mm.
The frame is as follows: four supporting blocks 19 are installed on the supporting plate 18, two supporting plates 18 are installed on the four supporting blocks 19, eight supporting frames 20 are installed on the supporting plate 18, the supporting plate 18 is installed on the supporting seat 21, the V-shaped block 23 is installed on the supporting frame 20, and the electric cylinder 1 is installed on the supporting blocks 19.
The beneficial effects of the utility model reside in that:
1. the utility model provides a current testing machine loading chain axiality need dismantle the loading chain, problem that can not adjust in real time, and filled prior art's blank to a certain extent.
2. The utility model provides a manual assembly adjustment precision uncontrollable, realized the adjustment once can, stability is good need not repeated adjustment reliability height, carries out the graduation to the adjusting spindle simultaneously, makes the adjustment volume reach 0.01mm, and adjustment range is big (± 0.5 mm), and angle adjustment spherical radius reachs the loading test piece center on the matrix, can make angle of adjustment be ± 0.35.
3. The four-axis centering adjustment system comprises a double-axis centering sensor, can identify 5 degrees of freedom such as coaxiality, angle and torsion of the loading chain, can analyze perpendicularity of two axes in the orthogonal direction and planeness formed by the axes, and has the detection precision of 0.01 mm.
4. The four-axis centering adjustment system comprises a coarse adjustment device (a support frame and a V-shaped block), wherein the coarse adjustment device is used for limiting to prevent the overload of a loading shaft from generating danger, and the support frame and the V-shaped block are installed in a split mode to coarsely adjust four freedom directions of a loading chain (two freedom degrees of the support frame and two freedom degrees of the V-shaped block).
5. The centering device and the clamp are in threaded connection and combination to realize adjustment of five degrees of freedom (two degrees of freedom of a loading chain installation orthogonal plane, two degrees of freedom of rotation and axial rotation of the loading chain), and adjustment of any angle and direction on the loading chain can be realized.
6. The design of the profiling wedge block clamp increases the clamping area, adjusts the clamping mode to enable the clamping force of a test piece with the same size to be larger, and also enables the loading force to be larger (the friction force of the traditional wedge block and the test piece is changed into the adhesive force of the wedge block and the test piece and the strength of the wedge block material to act together).
7. The quick-wear parts in the adjusting device and the parts with high positioning precision requirements are in standardized design, the important parts adopt the easy-to-machine parts and the standard parts of the rotary parts, the loss is reduced, the service life of the device is prolonged, and the rigidity of the whole device is not influenced.
8. The centering device is connected with the whole machine loading chain, the strength of the whole device is improved, the damage and the deformation to the loading shaft are reduced, meanwhile, the adjusting block is fixedly connected with the parent body, the single loading of the adjusting block is changed into the loading of the whole loading chain, the inner part of the adjusting block is connected by a flange, meanwhile, the centering gap in the loading chain is eliminated, the rigidity of the adjusting device has no influence on the rigidity of the whole machine system, meanwhile, the adjusting module is fixedly connected with the whole machine loading chain, the external force borne by the adjusting device is borne by the whole machine, the strength of the device is improved, and the rigidity of the device is increased by installing the adjusting module on the same parent body, so that the device is.
9. The centering device is connected with the loading chain, and the flange connection is adopted to improve the strength and eliminate the gap; just be in the utility model provides a centering device suitability is strong, is used for installing the loading chain of different footpaths through the size of adjustment parent and other parts.
10. The utility model provides a centering device can match multiple anchor clamps, and the space occupies for a short time, easy operation, and repeated adjustment precision is high, can improve the experiment precision, makes measured data more accurate.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate example embodiments of the invention and together with the description serve to explain the invention without limitation.
FIG. 1 is a drawing of the installation axis of the centering sensor of the present invention;
fig. 2 is an axonometric view of the centering sensor of the present invention;
fig. 3 is an exploded view of the centering adjustment device of the present invention;
fig. 4 is a sectional view of the centering adjustment device of the present invention;
FIG. 5 is a front view of the centering adjustment device of the present invention;
fig. 6 is an exploded view of the loading chain of the present invention;
fig. 7 is an isometric view of a loading chain of the present invention;
fig. 8 is a front view of the four-axis loading chain of the present invention;
fig. 9 is an exploded perspective view of the wedge profiling fixture of the present invention;
fig. 10 is an exploded perspective view of the frame of the present invention;
FIG. 11 is a perspective view of the whole machine of the present invention;
fig. 12 is an exploded view of the coarse adjustment device of the present invention;
FIG. 13 is a front view of the whole machine of the present invention;
fig. 14 is a partial enlarged view of the centering sensor according to the present invention.
In the figure: 1. an electrically actuated cylinder; 2. a parent body; 3. an angle adjusting bolt; 4. a fixing ring; 5. an angle adjustment shaft; 6. a coaxial adjusting bolt; 7. a sensor connecting shaft; 8. a sensor connecting bolt; 9. a force sensor; 10. locking a ring; 11. a guide shaft; 12. a pull rod mounting bolt; 13. a pull rod; 14. a clamp; 15. a clamp wedge; 16. a test piece; 17. fixing the ring and installing the bolt; 18. a support plate; 19. a support block; 20. a support frame; 21. a supporting seat; 22. a guide shaft slider; 23. a V-shaped block; 24. a base plate; 25. centering the sensor; 26. and (5) installing a bolt by the electric cylinder.
Detailed Description
The details of the present invention and its embodiments are further described below with reference to the accompanying drawings.
Referring to fig. 1 to 14, the four-axis centering adjustment system for a biaxial tensile testing machine of the present invention solves the problem that the coaxiality of the loading chain of the existing biaxial testing machine needs to be disassembled and the loading chain cannot be adjusted in real time, and fills the blank of the prior art to a certain extent; the adjustment amount reaches 0.01 mm/grid, and the adjustment range is +/-0.5 mm and +/-0.35 degrees; the double-shaft centering sensor can identify 5 degrees of freedom such as coaxiality, angle, torsion and the like of the loading chain, and can analyze the perpendicularity of two shafts in the orthogonal direction and the planeness formed by the axes, and the detection precision is 0.01 mm; the coarse adjustment device can be used for limiting to prevent the overload of the loading shaft from generating danger and can also be used for coarsely adjusting four degrees of freedom of the loading chain; the centering device and the clamp are in threaded connection and combination, so that five degrees of freedom can be adjusted, and the precision is correspondingly matched with that of the detection device; the utility model discloses be connected with complete machine loading chain, the intensity that has improved whole device reduces the destruction to the loading axle, and system adaptation nature is strong, can match different forms's loading chain and polytype anchor clamps, and the space occupies for a short time, easy operation, and repeated adjustment precision is high, improves the experiment precision, makes measured data more accurate.
Referring to fig. 6 to 8, the utility model discloses a four-axis centering adjustment system for biax tensile testing machine, including main shaft loading chain, centering adjusting device, centering sensor and feedback device, frame, centering adjusting device installs on main shaft loading chain, and main shaft loading chain installs in the frame, detects and feedback mechanism installs in the frame for detect and control the regulating variable.
The main shaft loading chain comprises an electric actuating cylinder 1, an electric cylinder mounting bolt 26, a sensor connecting bolt 8, a force sensor 9, a matrix 2, an angle adjusting shaft 5, a sensor connecting shaft 7, a coaxial adjusting bolt 6, a locking ring 10, a guide shaft 11, a clamp 14, a wedge block 15 and a test piece 16; the electric actuating cylinder 1 is installed on the supporting block 19 through eight electric cylinder installation bolts 26, a parent body 2 of the centering adjusting device is in threaded connection with an output shaft of the electric actuating cylinder 1, an angle adjusting shaft 5 of the centering adjusting device is installed on the parent body 2 through a threaded output shaft, a force sensor 9 is installed on a sensor connecting shaft 7 through 12 sensor connecting bolts 8, and the force sensor 9 is positioned on the sensor connecting shaft 7 through a cylindrical pin; the guide shaft 11 is screwed into the force sensor 9, the locking ring 10 is sleeved on the connecting shaft neck of the guide shaft 11, the guide shaft 11 is arranged on the V-shaped block 23, the clamp 14 is arranged on the guide shaft 11 through a clamp connecting bolt, and the test piece 16 is arranged on the clamp 14.
Referring to fig. 3 to 5, the centering adjustment device includes a parent body 2, an angle adjustment bolt 3, an angle adjustment shaft 5, a sensor connecting shaft 7, a fixing ring 4, a fixing ring mounting bolt 17, a coaxial adjustment bolt 6, a V-shaped block 23, a support frame 20, and a support plate 18; the device is characterized in that the matrix 2 is arranged on an output shaft of an electric actuating cylinder through a threaded shaft, a fixing ring 4 is arranged on the matrix 2 through a fixing ring mounting bolt 17, four angle adjusting bolts 3 are arranged on the fixing ring 4, an angle adjusting shaft 5 is in threaded connection with the matrix 2, a sensor connecting shaft 7 is connected with the angle adjusting shaft 5 through a threaded output shaft, and a coaxial adjusting bolt 6 is arranged on the angle adjusting shaft 5; the force sensor 9 is installed on the sensor connecting shaft 7 through a sensor connecting bolt 8, the V-shaped block 23 is installed on the support frame 20, and the support frame 20 is installed on the support plate 18.
Referring to fig. 1, 2 and 14, the centering sensor and the feedback device include a force sensor 9, a host, a processor, a centering test piece 16, a strain gauge and an electric cylinder grating scale; the force sensor 9 is installed on a loading chain, the host and the processor are connected with the force sensor 9 through a USB data line and installed on the rack to receive and process data, the grating ruler on the electric actuating cylinder 1 outputs displacement information to be transmitted to the host, the centering sensor 25 is installed on the loading chain, and the centering sensor 25 is formed by attaching strain patterns and strain gauges to the test piece 16.
Referring to fig. 6, the electric actuator 1 adopts a folding type electric cylinder CDJ2D16-100Z-M9B-B, and the stroke of the electric cylinder is 100 mm.
The six-dimensional force sensor adopts HBM-U10M, and the maximum measuring range of the force sensor is 125 KN.
The grating ruler adopts Heidenhain-Aelb-382c, and the maximum measuring range of the grating ruler is 250 mm.
Referring to fig. 10 to 13, the frame includes a supporting block 19, a supporting frame 20, a supporting seat 21, a supporting plate 18, a V-shaped block 23, and supporting legs 27; the four supporting blocks 19 are arranged on the supporting plates 18, the two supporting plates 18 are arranged on the left and right four supporting blocks 19, the eight supporting frames 20 are arranged on the supporting plates 18, the supporting plates 18 are arranged on the supporting seats 21, the V-shaped blocks 23 are arranged on the supporting frames 20, and the electric actuating cylinder 1 is arranged on the supporting blocks 19.
Referring to fig. 1 to 14, the assembly of the whole mounting and centering adjusting device of the present invention comprises the following steps:
step 1, assembling a frame:
1.1, firstly, placing a support plate 18 on a horizontal assembly platform, cleaning the surface, smearing lubricating grease in a threaded hole, simultaneously placing a support block 19 on the assembly platform, cleaning the installation surface, smearing the lubricating grease in the threaded hole, hoisting the support block 19 by using a crown block, installing the support block 19 on the support plate 18, and leveling;
1.2, mounting a support frame 20 at one side, adjusting the relative position, ensuring that the two support frames 20 are vertical to the axis of the loading chain, mounting a support plate 18 at the other side, screwing in a bolt, leveling, and applying a fixed torque to pre-tighten the bolt according to the loading requirement;
1.3, ensuring that the supporting block 19 is tightly attached to the supporting plate 18, assembling a pin after the installation is smooth, and screwing a bolt after the positioning is finished;
1.4, overturning the platform, installing the other side support plate 18 downwards in the direction of having linked firmly, measuring the parallelism of the upper support plate 18, screwing in the bolt after reaching the standard, installing the other side support frame 20 and screwing in the bolt, adjusting the positions of the two support frames 20 and measuring the verticality with the loading chain, applying a fixed torque pre-tightening bolt according to the loading requirement after reaching the standard, and finishing the assembly of the rack.
Step 2, installing the electric cylinder, inserting the corresponding mark into the corresponding hole position to ensure the accuracy of the installing spigot, and simultaneously applying a fixed torque to pre-tighten the bolt according to the loading requirement to complete the installation of the electric cylinder;
3.1, assembling a centering adjusting device:
3.1.1, placing the matrix 2 on a horizontal table, wiping the mounting surface, smearing lubricating grease on the mounting surface and the matched hole positions, and standing for preparation;
3.1.2, fixing the matrix, placing the angle adjusting shaft 5 in the middle of the matrix 2, aligning the angle adjusting shaft to the mounting hole position, and performing surface calibration leveling on the angle adjusting shaft 5, wherein the angle adjusting shaft is mounted to ensure the parallelism during screwing;
3.1.3, leveling the angle adjusting shaft, then leveling after integral pre-tightening is completed, and finally applying pre-tightening force specified by national standards;
3.1.4, after the installation, keeping the fixation, wiping the installation surface of the matrix 2, smearing lubricating grease on the installation surface and the matching hole positions, and standing for preparation;
3.1.5, mounting a fixing ring 4 on a parent body 2, sequentially screwing two opposite bolts, leveling, pre-tightening every two opposite bolts to finish 6 groups of bolts, leveling, applying pre-tightening force specified by national standards, and screwing an angle adjusting bolt 3 (the bolt contacts the surface of an angle connecting shaft);
3.1.6, placing a sensor connecting shaft 7 in the middle of an angle adjusting shaft 5, aligning to a mounting hole position, measuring the levelness of an end face, leveling, rotating a coaxiality adjusting block, tightening after detecting the parallelism of the face, and screwing a coaxial adjusting bolt 6 (the bolt contacts the surface of the sensor connecting shaft);
3.1.7, corresponding the direction of the adjusting bolt of the whole device to the mounting threaded hole (ensuring the correctness and uniqueness of the adjusting direction);
3.2, installing a sensor:
3.2.1, installing a spigot of a force sensor and sensor connecting shaft 7, ensuring that the two axes are vertical to the end face and are tightly matched, aligning a sensor mounting bolt 8, and adding a bolt gasket 24;
3.2.2, wiping the mounting surface, coating lubricating grease on the mounting surface and the matching hole positions, and screwing the sensor connecting bolt 8 on the loading chain by using a torque wrench;
3.2.3, coating lubricating grease on the middle threaded hole, and standing for preparation;
3.3, installing a guide shaft and a locking ring:
3.3.1, placing the assembled centering adjusting device on a horizontal table, installing two locking rings 10 at a guide shaft and connecting a middle threaded shaft of a force sensor 9;
3.3.2, screwing the guide shaft 11 into the force sensor 9, and positioning two end surfaces by using locking rings 10;
3.3.3, the minimum axial distance of the contact surface of the end surfaces of the two locking rings 10 when the locking rings are screwed in is to ensure that the guide shaft corresponds to the connecting direction of an assembled loading chain, the axial lines are coaxial, and the end surfaces are vertical;
step 4, installing the assembled loading chain:
4.1, hoisting the loading chain by using a crown block to finish the assembly with a spigot of the electric actuating cylinder 1, aligning a bolt mounting hole position and enabling the equipment use adjusting direction to be parallel to the front face of the host, screwing in a bolt, rotating an output shaft of the electric cylinder, adjusting the direction of a parent body to be parallel to the front face of the whole machine, and screwing down the bolt;
4.2, placing the guide shaft on the V-shaped block 23, adjusting the rotation angle of the support frame 20 to enable the guide shaft to be completely attached to the installation surface, and adjusting the position of the V-shaped block 23 on the support frame 20 to enable the guide shaft to be firmly supported by the existing loading chain;
4.3, installing a pull rod 13 and a clamp body 14, ensuring that the orientation of the clamp is parallel to the positive direction of the whole machine, screwing a bolt, installing the clamp wedge block 15 on the end surface of the guide shaft 11;
4.4, placing the test piece 16 on an assembly platform, wiping the surface, pasting the clamp wedge block 15, the strain gage and the strain gage on the surface in a grouping mode, standing and waiting for glue drying (preparing a centering sensor);
4.5, inserting the test piece 16 into the clamp wedge block in an inclined way of 45 degrees, rotating the test piece 16 by 45 degrees after installing the clamp wedge block 15, placing the test piece into the middle installation groove of the clamp 14, keeping manual adjustment, placing the test piece at the horizontal positioning baffle plates at the two sides, and completing the installation of the test piece 16;
4.6, adjusting the orientation of the whole loading chain to be consistent with the orientation of the front face of the whole machine, then screwing the bolt, simultaneously ensuring that the orientation of the clamp is parallel to one of the adjustment directions, and aligning the central axis of the test piece 16 to the axis of the loading chain;
4.7, opening the electric cylinder to pre-tighten the clamp and eliminate the clearance of the loading chain: firstly, the electric cylinder is loaded on a loading chain without a gap (the force value is kept unchanged or the variation amount is small) to keep a loading state, the numerical value change of the force sensor 9 in the process of loading the loading chain is smooth and has no sudden change, then a wrench is inserted into two holes on the side surface of the locking ring 10 to reversely twist and apply torque, the locking ring 10 is screwed, then the loading force is kept and then the loading is unloaded, the change of the middle force value is smooth, the output displacement of the grating ruler of the electric actuating cylinder 1 has no play and is linearly increased or decreased, the locking of the loading chain and the installation of the whole machine are completed, and the installation of the.
step 7, applying a pulling force to the electric actuating cylinder 1 in the horizontal direction, loading a centering sensor, detecting the axial strain in the horizontal direction to determine the offset direction and the offset, roughly adjusting the V-shaped block 23 on the support frame 20 to reduce the numerical variation, adjusting the strain distribution type, adjusting an angle adjusting module to adjust the strain distribution to be in the same direction, and having monotonicity, (one end is screwed in to the depth and the other end is correspondingly screwed out to the same depth during adjustment to prevent the part from being damaged or deformed by overload), adjusting the coaxiality again, and keeping the numerical deviation to be reduced or keeping the deviation magnitude of the deviation to be 10-3And continuously loading to check whether the numerical value is changed in the same axial directionOr the variable quantity is 5% of the value of the loading quantity, and finally complete unloading and repeated test are carried out (firstly, the loading chain on one side is adjusted, after the stretching reaches the standard, if the loading chain on the other side does not reach the standard for many times, the loading chain on the other side needs to be adjusted until the repeated test reaches the standard after unloading), and the centering adjustment in the horizontal direction of the whole machine is completed; then, adjusting the coaxiality of the longitudinal loading chain according to the same steps;
step 8, adjusting the verticality and the flatness of the composition of the two orthogonal loading chains loaded by the four shafts, firstly loading the four-axial electric actuating cylinder 1 and simultaneously applying tension, detecting whether the strain values of the four stretching arms are consistent by the loading centering sensor 25, the strain distribution is adjusted to be in the same axial direction by adjusting four axial centering adjusting devices, the support frame 20 and the V-shaped block 23 to perform centering adjustment (mainly an angle adjusting shaft), the strain distribution of the two shafts tends to be consistent or has monotonicity, then adjusting two axial directions in the orthogonal direction to enable the distribution trends of the two axial directions in the orthogonal direction to tend to be consistent, adjusting the coaxiality adjusting shafts in all the axial directions after finishing adjustment to ensure that the strain distribution values in all the axial directions are consistent (one end is screwed in to the depth and the other end is correspondingly screwed out to the same depth to prevent parts from being damaged or deformed in an overload mode), and finally adjusting the coaxiality and keeping the values with reduced deviation or 10-degree deviation.-3Continuously loading and checking whether the value is changed in the same axial direction or the variation is 5% of the value of the loading amount, finally carrying out complete unloading and carrying out repeated test (firstly, adjusting the loading chain on one side, after the stretching reaches the standard, if the loading chain on the other side is not required to be adjusted for a plurality of times until the repeated test reaches the standard after unloading), and finishing the centering adjustment in the horizontal direction of the whole machine; then, adjusting the coaxiality of the longitudinal loading chain according to the same steps;
step 9, pretensioning the centering sensor 9, loading in elastic deformation, keeping the force at 5% of the yield limit, recording the data of the force sensor 9 and the data of the centering sensor, checking the force and the torque in two orthogonal directions vertical to the plane of the loading chain, firstly adjusting the angle adjusting bolt on the spherical surface to reduce the torque in the direction vertical to the loading chain to the minimum value (or less than 5% of the loading force) and not increase along with the increase of the loading force, then adjusting the coaxiality adjusting direction to make the values of the force sensor and the centering sensor in the two orthogonal directions vertical to the plane of the loading chain be the minimum value (or less than 5% of the loading force) and not increase along with the increase of the loading force, then keeping the force at 10% and 15% of the yield limit, repeating the above steps, and loading the force value to the elastic limit after reaching the standard, the bias force is kept within 5% of the loading force or has small variation, or the displacement output by a grating ruler of the electric actuating cylinder is collected to calculate corresponding strain and stress to check whether the bias force is in a qualified range;
And finishing the loading and calibration of the whole machine adjusting device, and performing formal tensile test.
The above description is only a preferred example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made to the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a four-axis centering adjustment system for biax tensile testing machine which characterized in that: the centering and adjusting device is arranged on the main shaft loading chain, the main shaft loading chain is arranged on the rack, and the detection and feedback mechanism is arranged on the rack to detect and control the adjustment amount;
the main shaft loading chain is as follows: the electric actuating cylinder (1) is installed on the supporting block (19), a parent body (2) of the centering adjusting device is in threaded connection with an output shaft of the electric actuating cylinder (1), an angle adjusting shaft (5) of the centering adjusting device is installed on the parent body (2), the force sensor (9) is installed on the sensor connecting shaft (7), and the force sensor (9) is positioned on the sensor connecting shaft (7) through a cylindrical pin; a guide shaft (11) is screwed into a force sensor (9), a locking ring (10) is sleeved at a connecting shaft neck of the guide shaft (11), the guide shaft (11) is installed on a guide shaft sliding block (22), the guide shaft sliding block (22) is installed on a V-shaped block (23), the V-shaped block (23) is installed on a base plate (24), the base plate (24) is installed on a supporting frame (20), a clamp (14) is installed on a pull rod (13) through a pull rod bolt (12), a clamp wedge block (15) is installed on the clamp (14), and a test piece (16) is installed in the clamp (14).
2. The four-axis centering adjustment system for biaxial tensile testing machine according to claim 1, characterized in that: the centering adjusting device is as follows: the sensor comprises a parent body (2), a fixing ring (4), four angle adjusting bolts (3), an angle adjusting shaft (5), a sensor connecting shaft (7), a coaxial adjusting bolt (6), a sensor fixing shaft (2), a sensor fixing shaft (6) and a sensor fixing shaft (2), wherein the parent body (2) is installed on an output shaft of an electric actuating cylinder through a threaded shaft; the force sensor (9) is installed on the sensor connecting shaft (7) through a sensor connecting bolt (8), the V-shaped block (23) is installed on the supporting frame (20), and the supporting frame (20) is installed on the supporting plate (18).
3. The four-axis centering adjustment system for biaxial tensile testing machine according to claim 1, characterized in that: the centering sensor and the feedback device are as follows: the force sensor (9) is installed on a loading chain, the host and the processor are connected with the force sensor (9) through a USB data line and installed on a rack, the grating ruler on the electric actuating cylinder (1) outputs displacement information to be transmitted to the host, the centering sensor (25) is installed on the loading chain, and the centering sensor (25) is formed by attaching strain patterns and strain gauges to a test piece (16).
4. The four-axis centering adjustment system for biaxial tensile testing machines according to claim 1 or 3, characterized in that: the electric actuating cylinder (1) adopts a folding type electric cylinder CDJ2D16-100Z-M9B-B, and the stroke of the electric cylinder is 100 mm.
5. The four-axis centering adjustment system for biaxial tensile testing machine according to claim 1, characterized in that: the frame is as follows: four supporting blocks (19) are arranged on a supporting plate (18), eight supporting frames (20) are arranged on the supporting plate (18), the supporting plate (18) is arranged on a supporting seat (21), a V-shaped block (23) is arranged on the supporting frame (20), and an electric actuating cylinder (1) is arranged on the supporting blocks (19).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922118122.1U CN211179394U (en) | 2019-12-02 | 2019-12-02 | Four-axis centering adjustment system for biaxial tensile testing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922118122.1U CN211179394U (en) | 2019-12-02 | 2019-12-02 | Four-axis centering adjustment system for biaxial tensile testing machine |
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| CN211179394U true CN211179394U (en) | 2020-08-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726636A (en) * | 2019-12-02 | 2020-01-24 | 吉林大学 | Four-axis centering adjustment system and method for biaxial tensile testing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726636A (en) * | 2019-12-02 | 2020-01-24 | 吉林大学 | Four-axis centering adjustment system and method for biaxial tensile testing machine |
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