CN111307871B - Be used for not having (declining) to decrease and detect little test piece material performance test piece fixing device of wooden structure - Google Patents
Be used for not having (declining) to decrease and detect little test piece material performance test piece fixing device of wooden structure Download PDFInfo
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- CN111307871B CN111307871B CN201911397817.6A CN201911397817A CN111307871B CN 111307871 B CN111307871 B CN 111307871B CN 201911397817 A CN201911397817 A CN 201911397817A CN 111307871 B CN111307871 B CN 111307871B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/223—Supports, positioning or alignment in fixed situation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0238—Wood
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pathology (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- General Physics & Mathematics (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a device for fixing a performance test piece of a small wooden test piece material for non (micro) damage detection. The device mainly comprises a fixing device support, a fixing device base, a base fixing bolt, a fixing device support shrinking device, a support angle universal wheel, a fixing device support, and a fixing device support clamping contact. The invention relates to a scanning data acquisition fixing device for detecting material performance without (micro) damage of a small wooden test piece by using a stress detection method, a relative resistance value detection method or small test piece surface damage. The support of the small test pieces of different test beds can be met by adjusting the fixing device according to different heights, widths and the like of the small test pieces, and meanwhile, the support of the fixing device and the support can be respectively controlled to adjust in different directions to meet the requirement of data acquisition of the small test pieces in the support. The end mode that convertible fixing device dragged satisfies 360 rotations of test piece and carries out diversified data acquisition, and easily operation satisfies multiple nothing (little) decreases detection data acquisition, improves detection efficiency.
Description
Technical Field
The invention relates to a test piece fixing device for detecting the material performance of a small wooden test piece without (micro) damage. The invention belongs to the technical field of traditional building protection.
Background
The wood member occupies an important position in the historic building, the traditional wood member material performance detection mostly uses destructive tests to obtain data, and the detection time is long while the wood member is damaged. The wood member can be in (micro) damage-free state by using a stress method, an impedance method and other non (micro) damage detection, the performance of the reduced-scale material is detected by using a small test piece, and the research on the compression resistance, bending resistance and other performances of the wood member through the wave resistance modulus acquired in the experiment is favorable for protecting the ancient building.
When the performance of the small wooden test piece material is detected without (micro) damage, the stable placement of the test piece directly influences the detection result. At present, in the experimental process, an autonomous lapping temporary non-fixed table top is mostly adopted, or a plurality of persons mutually support a test piece to fix the test piece to finish the experiment, or other industry fixing devices are temporarily used for the use of (micro) damage-free detection. This seriously affects the accuracy of data acquisition and increases the workload and working strength of data acquisition.
Aiming at the problem that a test piece cannot be fixed when the performance of a small wooden test piece is detected without (micro) damage at present, the invention provides a test piece fixing device for detecting the performance of the small wooden test piece, which mainly adopts a fixing base to effectively fix the test piece fixing device on a test bed, then selects and adjusts different supporting and dragging end parts according to a selected detection mode without (micro) damage and the rotation direction of a support, ensures that the test piece of an experiment is more stable to be detected aiming at different clamping directions, is suitable for detecting the test piece without (micro) damage by a stress method, an impedance method and the like and acquiring 360-degree data on the surface of the test piece by a scanner, provides data support for the performance test of the wooden test piece, and simultaneously improves the data acquisition efficiency and the standardization of a detector.
Disclosure of Invention
The invention aims to provide a fixing device for a performance test piece of a small wooden test piece material for non (micro) damage detection. The device can be disassembled, is convenient to carry and move, can fix the fixing device base on the test bed to achieve the stable effect of the device in the assembling process, and can meet the requirements of test pieces and test beds with different lengths. According to the adjustable and controllable extension two-side support of the actual length and the width of the test piece, the effect of isolating the test piece from the desktop is achieved. The support on the two sides of the device is respectively provided with a support, when the material performance of the relative resistance value of the test piece is detected by using the impedance meter, the support can be perpendicular to the test piece, and meanwhile, the support on the support is square, is arranged at the lower end of the test piece, supports and clamps, so that the test piece can complete the detection of the upper impedance meter. When gathering stress wave and examining material properties, need lay at the test piece both ends and still need satisfy sensor and test piece simultaneously and must reach 45 because of involving the sensor, satisfy it through the universal wheel on the fixing device support that the runing rest is on a parallel with the test piece with it, adopt a support to drag the support and carry the test piece, effectually avoided the fixed bolster to block the sensor. When the surface damage data of the test piece are acquired, 360 degrees are needed, the test piece can be clamped by opening the pointed end clamping on the fixing device support, and the pointed end clamping interface is driven to rotate through the rotating shaft on the support according to the angle of actual needs, so that the data acquisition of different angles on the surface of the test piece is completed.
The invention adopts the technical scheme that a fixing device for detecting the performance test piece of a small wooden test piece material without (micro) damage is shown in figure 1 and comprises a fixing device bracket (1), a fixing device base A (2), an adjustable fixing device base B (3), a base fixing bolt (4), a fixing device base A friction pad (5), a fixing device bracket angle universal wheel (6), a fixing device bracket angle universal wheel handle (7), a universal wheel handle friction sleeve (8), a fixing device support (9), a fixing device bracket contraction device (10), a fixing device support clamping contact (11) and a fixing device bracket tip clamping opener (12). When the small wooden test piece is detected without (micro) damage, the distance between the fixing device base A (2) and the fixing device base B (3) can be adjusted according to the thickness of the test bed, and the distance between the fixing device supports (1) on the left side and the right side can be adjusted according to the length of the small wooden test piece (13). The fixing device for detecting the material performance test piece of the small wooden test piece (13) without (micro) damage can be fixed on the experiment table through the base fixing bolt (4). The distance between the fixing device base B (3) and the fixing device support bracket (9) can be adjusted according to the width of the small wooden test piece (13) so as to meet the performance requirements of different (micro) damage-free detection test piece materials. To prevent slippage between the fixture base B (3) and the base anchor stud (4) during the experiment, a fixture base A friction pad (5) is bonded under the fixture base B (3) during the fixation.
The angle universal wheel (6) of the fixing device support is connected to the fixing device support (1) through a fulcrum at the bottom end, the requirement that the angle universal wheel (6) of the fixing device support can be adjusted according to the width of a test bed and a (micro) damage-free detection method during an experiment is met, and the fixing device support (1) and a detected small wooden test piece (13) can form a parallel or vertical state. The angle universal wheel handle (7) of the bracket of the fixing device is connected with the angle universal wheel handle (6) of the bracket of the fixing device through screws, and a universal wheel handle friction sleeve (8) is sleeved at the end part of the angle universal wheel handle (7) of the bracket of the fixing device. And adjusting the position of the fixing device support (9) according to the height of the small wooden test piece (13) and the penetration length of a detection needle of the impedance meter (14). The back of the fixing device support (9) is provided with a convex buckle which can be clamped with the fixing device support clamp contact (11). The fixing device support shrinking device (10) is arranged inside the fixing device support (1), can be fixed inside the fixing device support (1) through clamping at two ends and can complete the stretching function as required. The sharp-end clamping opener (12) of the fixing device bracket is arranged on the side surface of the fixing device bracket support (9) and is opened or contracted through a spring clamping structure.
The fixing device support (9) is constructed as shown in fig. 2, and the fixing device support (9) comprises a fixing device bracket tip clamping opener (12), a fixing device bracket tip (15), a bracket tip spring (16) and a bracket tip opener (17). Fixing device support tip joint opener (12) set up in fixing device support and drag (9) side, the inside bottom of fixing device support tip (15) is equipped with support tip spring (16), through pressing down and opening support tip spring (16), press support tip opener (17) and open fixing device support tip (15), fixing device support tip (15) tip can be according to the length arbitrary shrink of little test piece (13) of timber structure for do not have (little) to decrease the data collection of detection to test piece surface damage.
Drawings
FIG. 1 is a fixing device for a performance test piece of a small (micro) damage-free detection wooden test piece material for extracting a relative resistance value;
FIG. 2 is a drawing showing a support structure of the fixing device;
fig. 3 is a cross-sectional view of the device.
Fig. 4 is a schematic diagram of the present apparatus.
In the figure: 1. the device comprises a fixing device support, 2, fixing device bases A and 3, adjustable fixing device bases B and 4, a base fixing bolt, 5, a friction pad of the fixing device base A, 6, a universal wheel of a fixing device support angle, 7, a universal wheel handle of a fixing device support angle, 8, a universal wheel handle friction sleeve, 9, a fixing device support, 10, a fixing device support contraction device, 11, a fixing device support and support clamping contact point, 12, a fixing device support tip clamping opener, 13, a small wooden test piece, 14, an impedance instrument, 15, a fixing device support tip, 16, a support tip spring, 17 and a support tip opener.
Detailed Description
Aiming at different extracted data requirements, the position, orientation and height of the device for fixing the material performance test piece of the small (micro) damage-free detection wooden test piece can be selected according to the requirements, and different forms of the bracket clamping joint can meet the requirements of the material performance of the small (micro) damage-free detection wooden test piece, so that the data extraction is more convenient and accurate. The following situations of the fixing device for the performance test piece of the wood small test piece material for non- (micro-) damage detection are common:
(1) when the stress value of a small test piece is collected, the fixing device for detecting the material performance of the wooden small test piece without (micro) damage needs to reduce the bracket of the fixing device, the bracket is adjusted to be parallel to the small test piece through the angle universal wheel of the bracket of the fixing device, the small test piece is placed on the bracket of the fixing device, sensors at two ends of the test piece are convenient to arrange, and the fixation and lifting of the test piece are met (see fig. 3).
(2) The surface damage also affects the performance of the wood structure material, and the surface damage and the internal wave resistance of the test piece can be comprehensively considered. When the surface damage data of a small test piece is collected, the fixing device for detecting the material performance of the wooden small test piece without (micro) damage needs to start a tip clamping opener of a bracket of the fixing device, the two end parts of the small test piece are fixed through the tip of the bracket of the fixing device, the test piece can rotate, and the data of 360-degree directions of the test piece are collected (see fig. 4).
Claims (9)
1. The utility model provides a be used for nondestructive test wooden small test piece material performance test piece fixing device which characterized in that: the fixing device comprises a fixing device bracket (1), a fixing device base A (2), an adjustable fixing device base B (3), a base fixing bolt (4) and a fixing device base A friction pad (5);
the fixing device bracket (1) comprises a fixing device bracket angle universal wheel (6), a fixing device bracket angle universal wheel handle (7), a universal wheel handle friction sleeve (8), a fixing device bracket contraction device (10) and a fixing device support and towing clamp contact (11);
the fixing device base A (2) and the adjustable fixing device base B (3) are inserted into the fixing device bracket (1) through the groove to form hinge joint; the bottom of a fixing device base A (2) is provided with a circular hollow, the inner wall of the fixing device base A (2) is provided with a rotating thread, the outer part of a base fixing bolt (4) is shaped like a spiral, after the fixing device base A (2) and an adjustable fixing device base B (3) are clamped on a test bed, the fixing device base A (2) and the adjustable fixing device base B (3) are clamped by pushing the base fixing bolt (4) upwards, and a fixing device base A friction pad (5) is arranged at the bottom of the adjustable fixing device base B (3); the angle universal wheel (6) of the fixing device bracket is in a solid iron ball shape, is embedded in the fixing device bracket (1) through a bottom fulcrum, and adjusts the direction of the fixing device bracket (1) according to the requirement of nondestructive testing of the small test piece of the wooden structure; the angle universal wheel handle (7) of the bracket of the fixing device is connected with the angle universal wheel (6) of the bracket of the fixing device through screws, and a universal wheel handle friction sleeve (8) is sleeved at the lower end of the angle universal wheel handle (7) of the bracket of the fixing device; the fixing device support shrinking device (10) shrinks in the fixing device support (1); the fixing device support-and-drag clamping contact (11) and the fixing device support-and-drag (9) are clamped with each other to complete the support and the loading of the small wooden test piece;
the fixing device support (9) comprises a fixing device bracket sharp head clamping opener (12), a fixing device bracket sharp head (15), a bracket sharp head spring (16) and a bracket sharp head opener (17); the fixing device support (9) is made of stainless steel, a convex buckle is welded on the back of the fixing device support (9), and the position of the fixing device support (9) is selected according to the height of the nondestructive testing small wooden test piece and the test bed; the fixing device bracket (1) is provided with fixing device support and clamping contacts (11) which are 5cm apart, and the fixing device support and clamping (9) is mutually connected with the fixing device support and clamping contacts (11) in a pulling way by using a buckle with a welding bulge on the back to form a fixing effect; the distances of the fixing device support and towing clamping joints (11) on the left fixing device support and the right fixing device support (1) are consistent, so that the heights of the two fixing device support and towing brackets (9) are consistent, and a small wooden test piece (13) is placed on the fixing device support and towing brackets (9) to be subjected to nondestructive testing and is in a stable state; the fixing device support sharp-pointed clamping opener (12) is arranged on the side face of the fixing device support (9) through screws and spring clamping buckles, and the sharp-pointed mode or the flat-pointed mode of the fixing device support is selected according to the requirement of non-destructive testing on acquisition of the data of the small wooden test piece.
2. The test piece fixing device for nondestructive testing of the material performance of the small wooden test piece according to claim 1, characterized in that: the fixing device bracket (1) is made of stainless steel.
3. The test piece fixing device for nondestructive testing of the material performance of the small wooden test piece according to claim 1, characterized in that: the fixing device base A (2) and the adjustable fixing device base B (3) are made of solid iron.
4. The test piece fixing device for nondestructive testing of the material performance of the small wooden test piece according to claim 1, characterized in that: the base fixing bolt (4) is made of iron.
5. The test piece fixing device for nondestructive testing of the material performance of the small wooden test piece according to claim 1, characterized in that: the fixing device support contraction device (10) is made of stainless steel.
6. The test piece fixing device for nondestructive testing of the material performance of the small wooden test piece according to claim 1, characterized in that: when little test piece of timber structure (13) height, the former highly can't satisfy nondestructive test time measuring of fixing device support (1), through the tip of drawing fixing device support constriction device (10), the joint through fixing device support constriction device (10) both ends is buckled and is held a tow contact point (11) mutual interlock with fixing device and accomplish the high fixed, reaches the material nature that adopts the impedance method to carry out the relative resistance value to little test piece of timber structure and detects the data acquisition requirement.
7. The test piece fixing device for nondestructive testing of the material performance of the small wooden test piece according to claim 1, characterized in that: if a stress method is used for carrying out nondestructive testing on acquired data, the fixing device support (1) is contracted, the height of the fixing device support (9) is consistent with that of the fixing device support (1), the angle universal wheel (6) of the fixing device support is rotated by 90 degrees to enable the small wooden test piece to be parallel to the fixing device support (1), and the fixing device does not influence the layout requirement of the stress wave sensor while supporting.
8. The test piece fixing device for nondestructive testing of the material performance of the small wooden test piece according to claim 1, characterized in that: when surface damage data acquisition needs to be carried out on the small wooden test piece, the small wooden test piece needs to be rotated in the data acquisition process so as to complete 360-degree data acquisition of the test piece, a fixing device bracket tip clamping opener (12) needs to be started, and a bracket tip spring (16) connected with a rod piece inside the fixing device bracket tip clamping opener (12) can pop out to push a fixing device bracket tip (15); the tip (15) of the bracket of the fixing device is made of stainless steel, the end part of the tip is designed as a lantern ring, the tip opener (17) of the bracket of the fixing device is pressed to start the contraction action of the tip (15) of the bracket of the fixing device, the contraction treatment is carried out according to the length of the small wooden test piece, and when the length is proper, the tip opener (17) of the bracket is pressed to carry out a locking function, so that the contraction action of the tip (15) of the bracket of the fixing device is stopped.
9. The test piece fixing device for nondestructive testing of the material performance of the small wooden test piece according to claim 1, characterized in that: still be equipped with the handle in one side that fixing device support dragged (9), lead to the rotation of fixing device support prong (15) through rotating handle when the surface defect of nondestructive test wooden small test piece, drive the rotation of wooden small test piece then and accomplish the data acquisition of the different angles of test piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911397817.6A CN111307871B (en) | 2019-12-30 | 2019-12-30 | Be used for not having (declining) to decrease and detect little test piece material performance test piece fixing device of wooden structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911397817.6A CN111307871B (en) | 2019-12-30 | 2019-12-30 | Be used for not having (declining) to decrease and detect little test piece material performance test piece fixing device of wooden structure |
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| Publication Number | Publication Date |
|---|---|
| CN111307871A CN111307871A (en) | 2020-06-19 |
| CN111307871B true CN111307871B (en) | 2022-06-07 |
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| CN201911397817.6A Active CN111307871B (en) | 2019-12-30 | 2019-12-30 | Be used for not having (declining) to decrease and detect little test piece material performance test piece fixing device of wooden structure |
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| TW509782B (en) * | 2001-11-20 | 2002-11-11 | Taiwan Forestry Res Inst | Nondestructive testing technique for wood stress wave |
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2019
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