CN102645379B - A kind of machinery of structural timber mechanical property grades method and apparatus - Google Patents
A kind of machinery of structural timber mechanical property grades method and apparatus Download PDFInfo
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- CN102645379B CN102645379B CN201210018741.3A CN201210018741A CN102645379B CN 102645379 B CN102645379 B CN 102645379B CN 201210018741 A CN201210018741 A CN 201210018741A CN 102645379 B CN102645379 B CN 102645379B
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Abstract
The machinery that the invention provides a kind of structural timber mechanical property grades method, it allows tested structural timber by a sense channel, in the channel, described tested structural timber is allowed to occur constant elastic deformation, record corresponding imposed load, or apply constant load on tested structural timber, record it to be out of shape accordingly, again measured data are transferred to computer system by force cell, calculate the data of the Deflection Modulus of Elasticity of this structural timber, the data staging group of these data and setting is compared, strength grading is made to tested structural timber, and this classification results is exported.Equipment provided by the invention it comprise passage in a frame, form this passage by fixed conveyor roller arrangement and mobile driving roller device and form at least three bearings, form two dynamometry regions, the equipment rack in the centre position in this dynamometry region each sets firmly a force application apparatus.Passage is also provided with corresponding sensor.
Description
Technical field
The present invention relates to wood nondestructive testing technical field, relate to a kind of structural timber mechanical property test method, especially provide a kind of harmless structural timber mechanical property machinery to grade method; The present invention also provides the equipment used in said method.
Technical background
Along with development and the growth in the living standard of national economy, people focus on the comfortableness of living environment and the complete property of building functions more, also increase year by year, thus accelerate the development of China's timber buildings to the demand of wooden frame structure.Structural timber grows up along with the demand of building industry to bearing carrier, compared with common wood, structural timber also also exists larger difference in the physical and mechanical property and production technology of product, the most important thing is that the timber for building structure will have engineering design value.Structural timber is glued together by several sawn timbers to form, and mainly can be used as timber structure beam column, I-beam, bent beam, the truss equivalent-load component of the buildingss such as gymnasium, music hall, factory building, house.Such purposes is just stricter for the requirement of the mechanical property of structural timber.
Structural timber is different from the structural wood of other material, the structural timber of same profile, and its mechanical property may differ greatly, and preferably detects stress levels piece by piece in use, to ensure construction quality.Detection for a large amount of component stress grades is classified, and it is unpractical for using conventional pressure tester to carry out detection.And the ocular estimate used in prior art is not science, inaccurate, just wish to have that a kind of efficiency is high thus, the classification method and apparatus that grades of structural timber stress machinery accurately.
Current domestic structural panel production technology, product standard are still in conceptual phase, especially key is graded checkout equipment or blank, the demand of timber buildings market to domestic wooden structures sheet material consumption cannot be met, more cannot provide safe and reliable science data for it.
Summary of the invention
The object of the invention is to improve the deficiencies in the prior art, provide a kind of can the machinery of the nondestructive measurement structural timber mechanical property method of grading.
Another object of the present invention is that the mechanical stress providing said method used is graded equipment.
The object of the present invention is achieved like this:
A kind of machinery of structural timber mechanical property grades method, it is a kind of lossless detection method, allow tested structural timber by a sense channel, in this sense channel, make described structural timber namely in non-destructive situation, constant elastic deformation is there is by allowing described tested structural timber, record corresponding imposed load, again measured data are transferred to computer system by force cell, calculate the data of the Deflection Modulus of Elasticity of this structural timber, the data staging group of these data and setting is compared, strength grading is made to tested structural timber, and this classification results is exported, or apply constant load on tested structural timber, record it to be out of shape accordingly, pass through displacement transducer, displacement datas different under recording permanent load, be transferred to computer system again, calculate the data of the Deflection Modulus of Elasticity of this structural timber, the data staging group of these data and setting is compared, strength grading is made to tested structural timber, and this classification results is exported.
The machinery of structural timber mechanical property provided by the invention grade method concrete can be:
Mechanical classification is carried out: this equipment comprises a frame in the equipment that grades as follows, this frame arranges a passage, this passage and structural timber section configuration to be measured and size match, and establish conveying mechanism on that channel, described structural timber is moved in the channels; At least three bearings are set in the channels, form a dynamometry region between every two adjacent bearings, two described dynamometry regions are set altogether, the equipment rack that channel-length direction is positioned at the centre position in this dynamometry region each sets firmly a force application apparatus;
This force application apparatus can be a dynamometry pressure roller, it is fixed in described frame, the end face of its dynamometry end stretches into passage one setpoint distance than the channel side wall of dynamometry pressure roller the same side, a corresponding distance is then expanded outwardly at relative channel side wall, allow described structural timber produce with this and set distortion accordingly, this dynamometry pressure roller arranges a force cell, obtains the numerical value that dynamometry pressure roller is applied to the power on described structural timber;
Structural timber to be measured is placed in described passage, move under described conveying mechanism drives, in two described dynamometry regions, described force application apparatus successively exerts a force on two relative sides of described structural timber, make described structural timber successively produce the contrary setting elastic deformation in direction, described force cell collects force value.
In described method, the step described structural timber printing classification marking can also be included in, the signal of described classification results is sent in a printing device, position after two described dynamometry regions of described sense channel arranges described printing device, by the structural timber of this position prints classification marking.
In structural timber suitability for industrialized production, the factor such as physical dimension, water percentage, density, annual ring width, texture gradient detecting and not only will consider timber varieties of trees, timber of grading of timber, also to consider the controling parameters such as load mode, movement velocity, acting force, displacement of timber, and the impact of the factor such as vibration equipment, ambient temperature and humidity, by the corresponding relation of the intensity and Deflection Modulus of Elasticity of setting up structural timber, realize structural timber quality control and grade fast.
Said method can be implemented in following equipment:
A kind of machinery of structural timber mechanical property grades equipment, it comprises a frame, this frame arranges a passage, establish fixed conveyor roller arrangement on that channel, i.e. conveying mechanism and mobile driving roller device, both arrange formation bearing on two sidewalls that passage is relative, and described structural timber is moved in the channels; At least three described bearings are set in the channels, a dynamometry region is formed between every two adjacent bearings, two described dynamometry regions are set altogether, the equipment rack that channel-length direction is positioned at the centre position in this dynamometry region each sets firmly a force application apparatus;
This force application apparatus is a dynamometry pressure roller, it is arranged in described frame, the end face of its dynamometry end stretches into passage one setpoint distance than the channel side wall of dynamometry pressure roller the same side, a corresponding distance is then expanded outwardly at relative channel side wall, allow described structural timber produce with this and set distortion accordingly, this dynamometry pressure roller arranges a force cell, obtains the numerical value that dynamometry pressure roller is applied to the power on described structural timber;
In described passage, be also provided with the position transducer arrived for perceptual structure timber termination, the position of setting position sensor includes: the porch of described passage; The rear side of a rear described bearing in second dynamometry region on the rear side of a rear described bearing and described passage in first dynamometry region on described passage.
Described conveying mechanism can be driving roller device, or conveyor-belt apparatus.
Described conveying mechanism is preferably: in described frame, set firmly at least three group fixed conveyor rollers, often organizes live-roller and is connected by driving-belt, and often of organizing in live-roller connects a motor as drive roll by driving-belt; The frame of side relative with described live-roller in described passage arranges mobile driving roller device movably perpendicular to described passage, this moves driving roller device and comprises a support, this support arranges some live-rollers rotationally corresponding with described fixed conveyor roller, this support connects a straight-line motion mechanism.
Described straight-line motion mechanism can be an air cylinder device.
Described straight-line motion mechanism is an air cylinder device, and it is two air cylinder devices, is namely be connected in parallel by two cylinders.
Described fixed conveyor roller and described mobile driving roller device upper and lower side correspondence in described passage is arranged, or left and right side correspondence is arranged.
This channel side wall extended out is: comprise described dynamometry pressure roller at this force application apparatus, also comprise a fixing roller row, be fixed in described frame, corresponding with dynamometry pressure roller, this fixing roller row has a framework, arrange along channel-length direction on the frame, set firmly some rollers rotationally, middle roller is protruding relative to the sidewall of passage, the roller on both sides is gradually inside, the roller at two ends is concordant with channel side wall, roller row forms with backer roll the deflection spacing that structural timber bends setting jointly thus, pitch match between the length of this roller row and two bearings, or,
Some positions are also provided with the position transducer arrived for perceptual structure timber termination in described passage: the porch of described passage is provided with first group of position transducer
,on described passage, in first dynamometry region, the rear side of a rear bearing is provided with second group of position transducer
,on described passage, in second dynamometry region, the rear side of a rear bearing is provided with the 3rd group of position transducer.First group of position transducer provides the signal of described structural timber admission passage, and the 3rd group of position transducer provides the signal of described structural timber leaving channel.For same structure timber, time the while of first and second group position transducer effectively, pick up the signal data on the first force cell; Time the while of second and third group position transducer effectively, pick up the signal data on the second force cell.
Further, described passage is also provided with vibration transducer, it is induction vibration speed, frequency or acceleration etc.The effect played is, when the mobile vibration produced due to structural timber in this passage exceedes setting value, then can notify operator, the stress data now measured will be deleted, Bu Nengyong.
This equipment also can arrange tachogenerator, be positioned on the profile of tooth belt wheel of driven voller or driven voller connection, for the translational speed of detection architecture timber.Can also Temperature Humidity Sensor be set, for the temperature and humidity of monitoring environment.
A position after two described dynamometry regions of described passage arranges a printing device, and the printhead of this printing device is towards the path being placed in tested structural timber process on this passage.
The machinery of structural timber mechanical property provided by the invention grades method and the equipment that grades, achieve for structural timber mechanics properties testing fast and accurately, the timber of different intensity grades can be optimized by stress rating, for timber buildings design and structural wood manufacture, reach applicable just now, guarantee the security of building, also can accomplish the excellent use of excellent material.
Compared with traditional visual grading method; machinery grades and can detect the undistinguishable place of visual grading Measures compare; as fiber inclination locally and low-density part etc.; the mechanical strength of timber can be evaluated fast and exactly; make lumber grading can realize robotization and scale, improve the production efficiency of structural timber.
The machinery of structural timber mechanical property provided by the invention grades method and apparatus can the detecting step of Measurement accuracy structural wood strength character, can effectively avoid changing the measuring error caused due to factors such as sawn timber water percentage, density, temperature, vibrations.
Below by drawings and Examples, the present invention will be further described.
Accompanying drawing explanation
Fig. 1 is that the machinery of structural timber mechanical property provided by the invention grades equipment schematic.
Fig. 2 is that the machinery of structural timber mechanical property provided by the invention grades device structure schematic diagram.
Embodiment
As depicted in figs. 1 and 2, the machinery of structural timber mechanical property provided by the invention grades method, it allows tested structural timber by a sense channel 100, in this sense channel 100, make described structural timber when not destroyed, there is constant elastic deformation, record corresponding imposed load, again measured data are transferred to computer system 200 by force cell, calculate the data of the Deflection Modulus of Elasticity of this structural timber, the data staging group of these data and setting is compared, strength grading is made to tested structural timber, and this classification results is exported.
As shown in Figure 1, the equipment that said method uses for: the upside in described path 10 0 arranges fixed conveyor roller arrangement 300 described in three groups along the length direction of passage, each motor in synchrony arranged in three groups of fixed conveyor roller arrangements runs, and makes the live-roller synchronous axial system in three groups of fixed conveyor roller arrangements; In the downside of this path 10 0 and described fixed conveyor roller arrangement corresponding position, mobile driving roller device 400 described in three groups is set, as three air cylinder device synchronous operations of described straight-line motion mechanism.
Arrange at least three bearings in the channels, each bearing is consisted of a fixed conveyor roller arrangement 300 and a mobile driving roller device 400.Form a dynamometry region between every two adjacent bearings, two described dynamometry regions are set altogether, the equipment rack that channel-length direction is positioned at the centre position in this dynamometry region each sets firmly a force application apparatus 500;
Particularly, the machinery of structural timber mechanical property provided by the invention grades equipment see Fig. 2, this equipment comprises a frame 24, this frame 24 arranges described passage, this passage and structural timber section configuration to be measured and size match, in the frame 24 of this equipment on that channel, three conveying mechanisms 2 of order arrangement along its length form aforesaid fixed conveyor roller arrangement, and described structural timber is moved in the channels; Also be provided with the mobile driving roller device that three covers are made up of cylinder, clamping brace roller etc.Fixed conveyor roller arrangement and mobile driving roller device constitute three bearings, also form described passage.
Described fixed conveyor roller arrangement also can be described as conveying mechanism, its preferred embodiment is: in described frame 24, set firmly at least three group fixed conveyor roller arrangements, often organize fixed conveyor roller arrangement and comprise a drive roll 7, variable-frequency motor 10 and several driven vollers 8, each driven voller is arranged in a line along channel-length direction and is arranged on a support 3 fixing in frame 24 rotationally, drive roll 7 connects on the output shaft of the variable-frequency motor 10 be arranged in frame 24, and drive roll 7 drives the driven voller 8 with profile of tooth belt wheel to rotate by cog belt.Variable-frequency motor 10 has independently blower fan cooling, and the heat radiation of motor under the slow-speed of revolution can be avoided not enough.
Described bearing be side relative with described fixed conveyor roller arrangement in described passage frame on perpendicular to described passage, described mobile driving roller device is set movably, or be called clamping brace mechanism 25, each clamping brace mechanism 25 comprises a support 16, this support 16 arranges some live-rollers rotationally, also clamping brace roller 27 can be called, corresponding up and down with described fixed conveyor roller, this support 16 connects a straight-line motion mechanism.It is an air cylinder device 28.The piston rod of air cylinder device 28 is provided with a guide plate 29, and this guide plate 29 is embedded in the guide groove arranged on support 16.
Two cylinder 28, can be connected in parallel by two cylinders, carry out propclip compact schemes roller 27 thus, both the stability of supporting construction had been ensured, realize the quick test of timber and high transporting velocity, avoid again the time of the flexible waste of cylinder about 28, improve the work efficiency of timber test.
Three clamping brace rollers 27 on a support 16 can be arrange in a line along channel-length direction to arrange on a framework, and this framework is arranged on cylinder piston.Start air cylinder device 28, make three clamping brace rollers 27 together upwards, arriving with driven voller 8 spacing in aforementioned fixed conveyor roller arrangement is setting value.
Mobile driving roller device is also provided with a cylinder position-limit mechanism: on cylinder piston rod, or the support 16 be attached thereto is provided with gag lever post 91, frame 24 sets firmly a locating part 9, and the spacing between gag lever post termination and locating part is cylinder and runs to the upper limit supporting timber.Start cylinder 28, make gag lever post 91 be against locating part 9.In order to use the structural timber of all size, the height of locating part should be adjustable, can arrange a screw, by rotary screw, make the height adjustable of screw cap and confined planes on locating part 9.In order to the fixed thick spacing of rapid adjustment timber, a removable thickness pad 32 can be provided with in gag lever post termination.
This force application apparatus can be comprise load test device support 19, is fixed in frame 24, and the end on this support 19 and dynamometry end are a backer roll 18, is rotatably mounted on a load test device support 19.The channel side wall of end face unit load proving installation the same side and the end face of clamping brace roller 27 or drive roll 7 and driven voller 8 of backer roll 18 stretch into passage one setpoint distance.
A corresponding distance is then expanded outwardly at relative channel side wall, allow described structural timber produce with this and set distortion accordingly, this channel side wall extended out can be: also comprise a dynamometry pressure roller at this force application apparatus, it comprises a fixing roller row 5, be fixed in described frame 24, corresponding with backer roll 18, this fixing roller row has a framework, arrange along channel-length direction on the frame, set firmly some rollers rotationally, middle roller is protruding relative to the sidewall of passage, the roller on both sides is gradually inside, the roller at two ends is concordant with channel side wall, roller row forms with backer roll the deflection spacing that structural timber bends setting jointly thus, pitch match between the length of this roller row and two bearings.
Its dynamometry end is a backer roll 18, be rotatably mounted on a load test device support 19, support 19 arranges force cell 22, another dynamometry pressure roller arranges a force cell 4, obtain the numerical value that dynamometry pressure roller is applied to the power on described structural timber.
Force cell is arranged in load test device, electronic scales can be regarded as together with backer roll, when timber passes through, pressurization rod is subject to the effect of power, be equivalent on electronic scales, put weight, electronic scales will demonstrate object to be had multiple, and that is, force cell demonstrates backer roll and applies great power.
Structural timber to be measured is placed in described passage, move under described conveying mechanism drives, in two described dynamometry regions, described force application apparatus successively exerts a force on two relative sides of described structural timber, make described structural timber successively produce the contrary setting elastic deformation in direction, described force cell collects force value.
The upper-lower position of the backer roll 18 of dynamometry end also can be finely tuned, this backer roll 18 is arranged on load test device support 19 rotationally, this support 19 can be arranged in frame 24 up or down, one screw mechanism 6 is set between frame 24 and support 19, by regulating this screw mechanism 6 i.e. adjustable backer roll and fixing roller below to arrange spacing between 5, thus regulate the size of force.
Driven voller 8 in described fixed conveyor roller arrangement and described clamping brace roller 27 device upper and lower side correspondence in described passage is arranged.
Described fixed conveyor roller arrangement and mobile driving roller device also can relatively be arranged in the left and right side of passage correspondence, for two, the left and right side force test of structural timber, test like this, can also reduce the impact of parts or structural timber deadweight.
Some positions are also provided with the position transducer arrived for perceptual structure timber termination in described passage, the position of setting position sensor includes:
Charging aperture 1 place of described passage, the position transducer 31 at this place provides the signal of described structural timber admission passage;
The rear side setting position sensor 23 of a rear bearing and position transducer 17 in second dynamometry region on the rear side of a rear bearing and described passage in first dynamometry region on described passage, it is in place in corresponding dynamometry region that the position transducer at this place provides described structural timber, can pick up the signal of the data on force cell this moment.
Some positions are also provided with the position transducer arrived for perceptual structure timber termination in described passage: the porch of described passage is provided with first group of position transducer 31
,on described passage, in first dynamometry region, the rear side of a rear bearing is provided with second group of position transducer 23
,on described passage, in second dynamometry region, the rear side of a rear bearing is provided with the 3rd group of position transducer 17.First group of position transducer 31 provides the signal of described structural timber admission passage, and the 3rd group of position transducer 17 provides the signal of described structural timber leaving channel.For same structure timber, effectively, when timber namely having been detected, computer system has picked up the signal data on the first force cell to first and second group position transducer simultaneously simultaneously; Time the while of second and third group position transducer effectively, pick up the signal data on the second force cell.
Further, described passage is also provided with vibration transducer, it is induction vibration speed, frequency or acceleration etc.The effect played is, when the mobile vibration produced due to structural timber in this passage exceedes setting value, then can notify operator, the stress data now measured will be deleted, Bu Nengyong.Vibration transducer can be arranged on force application apparatus, such as, be arranged on the vibration transducer 22 on load test device support 16.
This equipment also can arrange tachogenerator 30, and it is arranged on the driven voller profile of tooth belt wheel of each conveying mechanism.For the translational speed of detection architecture timber.Temperature Humidity Sensor 26 can also be set, for the temperature and humidity of monitoring environment.
A position after two described dynamometry regions of described passage, such as channel exit arranges a spray code spraying apparatus 12, this spray code spraying apparatus 12 connects a pipeline, pipeline is arranged nozzle 14, this pipeline arranges solenoid valve 13.This spray code spraying apparatus connects a printing device, as the spray code spraying apparatus of the printhead of this printing device towards the path being placed in tested structural timber process on this passage.
Frame 24 is also provided with head tank 15, connects the cylinder 28 of several clamping brace mechanism 25.
After device start, clamping brace roller 27 is risen to fixed position along guide plate 29 by the cylinder 28 first in clamp system, a determining deviation is formed between clamping brace roller 27 and drive roll 7 and driven voller 8, between the upper and lower apart from being slightly less than lumber thickness, to ensure that tested timber can pass through smoothly under the drive of upper lower driving roller.Can ensure by adjusting bolt group 9 according to the thickness of tested timber apart from size between the upper and lower.Distance between three conveying mechanisms 2, defines two tests span, i.e. two dynamometry regions, in the middle of each test span, is provided with load test device 20.When the timber after sawing with certain specification size is entered by charging aperture 1, in conveying mechanism 2 variable-frequency motor 10 driving effect under, successively by three conveying mechanisms and supply unit.The live-roller that in load test device 20, first group is fixed in roller row 5 and adjacent conveying mechanism 2 is the roller faces of spill angle, and namely multiple roller comes together, and the surface of formation is in being directed through structure.When timber is arranged by the fixing roller of first half, along with the change of spill angle, timber there will be the distortion of certain radian, and the size of timber deformation force is noted down by force cell 4 by backer roll 18, and load test direction from top to bottom.Again when timber arranges 5 by the fixing roller of second group, the change timber along with spill angle there will be the distortion of certain radian, and the size of timber deformation force is noted down by another force cell 22 by backer roll 18, and load test direction from the bottom to top.Realize timber stressed from upper and lower both direction, test value gets the mean value of every block timber bending required power under two spans to eliminate the impact of wood weight and linearity deviation, ensures the comprehensive of timber test.
Because timber transporting velocity is very fast, reach 300m/min the soonest, certainly will impact equipment rack 24 and vibrate, vibration transducer 21 be by the vibration state of record equipment, if vibrate excessive, the parameter such as equipment and timber transporting velocity need be readjusted to ensure the accuracy of load test.Temperature Humidity Sensor 26 notes down the humiture of environment, to ensure the accuracy of test data.Tachogenerator 30 is positioned on cog belt wheels 11, for ensureing variable-frequency motor 10 output speed.Position transducer 17 points three groups is arranged on equipment pipeline, detects the diverse location of timber respectively, when detecting that timber enters for first group, starts the load test starting record first half; After detecting that timber is by the load test of first half when second group, start the load test starting record latter half; After detecting that timber is by the load test of latter half when the 3rd group, start to start code spraying system 12 and print the different brackets detecting rear timber.
Even in order to ensure the speed that timber is carried, synchronous charging rate, namely will guarantee the synchronism of three supply unit drive roll 7 speed, therefore, a frequency converter can be adopted to drive three variable-frequency motors 10 simultaneously.
Motor and adopt Synchronous Belt Drives between drive roll and driven voller in conveying mechanism, compact integral structure, ratio of gear are accurate, impact resisting vibrating good, operate steadily, be suitable for load little, vibrate large timber test lathe.
The charging of structural timber provided by the invention and load mode, i.e. overall floating structure, often organize clamping brace unit by two cylinder 28, namely two cylinders are connected in parallel, carry out propclip compact schemes roller 27 thus, both ensured the stability of supporting construction, realize the quick test of timber and high transporting velocity, avoid again the time of the flexible waste of cylinder about 28, improve the work efficiency of timber test;
Equipment provided by the invention, can easily according to the spacing of the upper lower driving roller of timber fixed thick spacing adjustment.The change of lumber thickness is completed by aforementioned stop means.Adjustment bolt and the spacing between locating part 9 and gag lever post 91, between the upper and lower apart from being slightly less than lumber thickness, to ensure that tested timber passes through smoothly.Can be ensured by thickness pad 32 according to the thickness of tested timber apart from size between the upper and lower.
In the present invention, three groups of positions are detected, and are conducive to technological process.
First group of photoelectric sensor, i.e. position transducer 31, for adding up the quantity of sawn timber, distinguish the information of different sawn timber.First group and second group of photoelectric sensor, i.e. position transducer 31 and position transducer 23 action simultaneously, for determining in load test device, whether effective first group load, and when two sensors has signal, first group loads effectively; Second group and the 3rd group of photoelectric sensor, i.e. position transducer 23 and position transducer 17, for determining in load test device, whether effective second group load, and when two sensors has signal, second group loads effectively.
Increase Temperature Humidity Sensor in equipment of the present invention, in advance can the data that record within the specific limits of the factor such as predetermined water percentage, temperature, vibration effective, if these factors do not meet, this time is measured and was lost efficacy.Can specify under environment structural timber strength character by Measurement accuracy, on the test of environment and the impact of timber humiture, have following advantage:
1) environment epidemic disaster: as auxiliary environment parameter, for reference, also can revise measurement result.
2) timber humidity: as measurement parameter, have impact to measurement result, can be used as revising result.
Arrange vibration transducer in equipment of the present invention, whether judgment device works well, and can reduce vibration error.
Tachogenerator 30 is set in equipment of the present invention, closed-loop control can be realized, accurately can be measured rotation direction and the speed of variable-frequency motor by Photoelectric Detection module and external processor, reduce the driving error that V belt translation produces, ensure control accuracy and reliability to greatest extent.
The present invention coordinates the control gear be connected with the motor in this equipment, air cylinder driven mechanism and each sensor signal, such as data acquisition card and signal transacting, amplification, filter, automatic measurement can be realized and automatically gather the parameters such as acting force, displacement, vibration, humiture, thus ensure high precision and the high stability of test.And these devices realizing measurement automatically, automatically gather, and undertaken calculating and comparing with setting data by computer, be prior art, repeat no more herein.
The machinery of this structural timber mechanical property method and apparatus that grades can also be setting force size, the deflection of detection architecture timber, thus draws the mechanical properties such as elastic modulus.Displacement transducer can be set on the passage of force application point, obtain displacement data.In previous examples, difference is just to arrange corresponding sensor, and other structure can substantially not change and can realize.
Claims (10)
1. the machinery of a structural timber mechanical property grades method, it is characterized in that: be a kind of lossless detection method, allow tested structural timber by a sense channel, in this sense channel, make described structural timber in non-destructive situation, constant elastic deformation is there is by allowing described tested structural timber, record corresponding imposed load, again measured data are transferred to computer system by force cell, calculate the data of the Deflection Modulus of Elasticity of this structural timber, the data staging group of the data of this Deflection Modulus of Elasticity and setting is compared, strength grading is made to tested structural timber, and this classification results is exported, or apply constant load on tested structural timber, record it to be out of shape accordingly, pass through displacement transducer, displacement datas different under recording permanent load, be transferred to computer system again, calculate the data of the Deflection Modulus of Elasticity of this structural timber, the data staging group of the data of this Deflection Modulus of Elasticity and setting is compared, strength grading is made to tested structural timber, and this classification results is exported,
Mechanical classification is carried out: this equipment comprises a frame in the equipment that grades as follows, this frame arranges a passage, this passage and tested structural timber section configuration and size match, establish fixed conveyor roller arrangement and mobile driving roller device on that channel, fixed conveyor roller arrangement and conveying mechanism, described fixed conveyor roller arrangement forms bearing with described mobile driving roller device on two sidewalls that passage is relative, and described structural timber is moved in the channels; At least three described bearings are set in the channels, a dynamometry region is formed between every two adjacent bearings, two described dynamometry regions are set altogether, the equipment rack that channel-length direction is positioned at the centre position in this dynamometry region each sets firmly a force application apparatus;
This force application apparatus is a dynamometry pressure roller, it is arranged in described frame, the end face of its dynamometry end stretches into passage one setpoint distance than the channel side wall of dynamometry pressure roller the same side, a corresponding distance is then expanded outwardly at relative channel side wall, allow described structural timber produce with this and set distortion accordingly, this dynamometry pressure roller arranges a force cell, obtains the numerical value that dynamometry pressure roller is applied to the power on described structural timber;
Tested structural timber is placed in described passage, move under described conveying mechanism drives, in two described dynamometry regions, described force application apparatus successively exerts a force on two relative sides of described structural timber, make described structural timber successively produce the contrary setting elastic deformation in direction, described force cell collects force value; Some positions are also provided with the position transducer arrived for perceptual structure timber termination in described passage: the porch of described passage is provided with first group of position transducer
,on described passage, in first dynamometry region, the rear side of a rear bearing is provided with second group of position transducer
,on described passage, in second dynamometry region, the rear side of a rear bearing is provided with the 3rd group of position transducer; First group of position transducer provides the signal of described structural timber admission passage, and the 3rd group of position transducer provides the signal of described structural timber leaving channel;
For same structure timber, time the while of first and second group position transducer effectively, pick up the signal data on the first force cell; Time the while of second and third group position transducer effectively, pick up the signal data on the second force cell;
The data staging group of described setting sets according to the physical dimension of timber varieties of trees, timber, water percentage, density, annual ring width, texture gradient and load mode, movement velocity, acting force, displacement, vibration equipment, ambient temperature and humidity;
Accordingly, described passage is provided with vibration transducer, induction vibration speed, frequency or acceleration, make when the mobile vibration produced due to structural timber in this passage exceedes setting value, then notify operator, the stress data now measured will be deleted, Bu Nengyong;
The described equipment that grades also is provided with tachogenerator and Temperature Humidity Sensor.
2. the machinery of structural timber mechanical property according to claim 1 grades method, it is characterized in that: in described method, also be included in the step described structural timber printing classification marking, the signal of described classification results is sent in a printing device, position after two described dynamometry regions of described sense channel arranges described printing device, by the structural timber of this position prints classification marking.
3. the machinery of structural timber mechanical property according to claim 1 grades method, it is characterized in that: the upside in described passage arranges fixed conveyor roller arrangement described in three groups along the length direction of passage, each motor in synchrony arranged in three groups of fixed conveyor roller arrangements runs, and makes the fixed conveyor roller in three groups of fixed conveyor roller arrangements synchronous; In the downside of this passage and described fixed conveyor roller arrangement corresponding position, mobile driving roller device described in three groups is set, as three air cylinder device synchronous operations of straight-line motion mechanism.
4. the machinery of structural timber mechanical property according to claim 3 grades method, it is characterized in that: each this moves driving roller device and comprise a support, this support arranges some mobile live-rollers rotationally corresponding with described fixed conveyor roller, this support connects air cylinder device described in, described support be side relative with described fixed conveyor roller arrangement in described passage frame on arrange movably perpendicular to described passage, described air cylinder device is two air cylinder devices, the piston rod of described air cylinder device is provided with guide plate, this guide plate is embedded in the guide groove arranged on support, two cylinder is connected in parallel by two cylinders, support described mobile driving roller device thus.
5. the machinery that the structural timber mechanical property used in the machinery of such as one of claim 1 to 4 grades method is harmless grades equipment, it is characterized in that: comprise a frame, this frame arranges a passage, establish fixed conveyor roller arrangement and mobile driving roller device on that channel, fixed conveyor roller arrangement and conveying mechanism, described fixed conveyor roller arrangement forms bearing with described mobile driving roller device on two sidewalls that passage is relative, and described structural timber is moved in the channels; At least three described bearings are set in the channels, a dynamometry region is formed between every two adjacent bearings, two described dynamometry regions are set altogether, the equipment rack that channel-length direction is positioned at the centre position in this dynamometry region each sets firmly a force application apparatus;
This force application apparatus is a dynamometry pressure roller, it is arranged in described frame, the end face of its dynamometry end stretches into passage one setpoint distance than the channel side wall of dynamometry pressure roller the same side, a corresponding distance is then expanded outwardly at relative channel side wall, allow described structural timber produce with this and set distortion accordingly, this dynamometry pressure roller arranges a force cell, obtains the numerical value that dynamometry pressure roller is applied to the power on described structural timber;
In described passage, be also provided with the position transducer arrived for perceptual structure timber termination, the position of setting position sensor includes: the porch of described passage; The rear side of a rear described bearing in second dynamometry region on the rear side of a rear described bearing and described passage in first dynamometry region on described passage;
Described passage is provided with vibration transducer, induction vibration speed, frequency or acceleration;
The described equipment that grades also is provided with tachogenerator and Temperature Humidity Sensor.
6. the machinery that structural timber mechanical property according to claim 5 is harmless grades equipment, it is characterized in that: described conveying mechanism is fixed conveyor roller arrangement, or conveyor-belt apparatus.
7. the machinery that structural timber mechanical property according to claim 5 is harmless grades equipment, it is characterized in that: described conveying mechanism is: in described frame, set firmly at least three group fixed conveyor rollers, often organize fixed conveyor roller to be connected by driving-belt, the belt wheel connected on a motor output shaft by driving-belt as drive roll often organized in fixed conveyor roller is connected; The frame of side relative with described fixed conveyor roller in described passage arranges mobile driving roller device movably perpendicular to described passage, this moves driving roller device and comprises a support, this support arranges some mobile live-rollers rotationally corresponding with described fixed conveyor roller, this support connects a straight-line motion mechanism.
8. the machinery that structural timber mechanical property according to claim 5 is harmless grades equipment, it is characterized in that: described fixed conveyor roller and described mobile driving roller device upper and lower side correspondence in described passage is arranged, or left and right side correspondence is arranged.
9. the machinery that structural timber mechanical property according to claim 5 is harmless grades equipment, it is characterized in that: a position after two described dynamometry regions of described passage arranges a printing device, and the printhead of this printing device is towards the path being placed in tested structural timber process on this passage; Or,
Between fixed conveyor roller in described conveying mechanism and motor, flat-toothed belt is set.
10. the machinery that structural timber mechanical property according to claim 5 is harmless grades equipment, it is characterized in that: this channel side wall extended out is: this force application apparatus comprises described dynamometry pressure roller, also comprise a fixing roller row, be fixed in described frame, corresponding with dynamometry pressure roller, this fixing roller row has a framework, arrange along channel-length direction on the frame, set firmly some rollers rotationally, middle roller is protruding relative to the sidewall of passage, the roller on both sides is gradually inside, the roller at two ends is concordant with channel side wall, roller row forms with backer roll the deflection spacing that structural timber bends setting jointly thus, pitch match between the length of this roller row and two bearings.
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| CN201210018741.3A CN102645379B (en) | 2012-01-20 | 2012-01-20 | A kind of machinery of structural timber mechanical property grades method and apparatus |
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| CN102645379B true CN102645379B (en) | 2015-10-28 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103433983B (en) * | 2013-08-12 | 2015-02-11 | 宁波中加低碳新技术研究院有限公司 | High-performance laminated veneer lumber panel and production method thereof |
| CN104132851B (en) * | 2014-08-05 | 2016-06-15 | 黑龙江省木材科学研究所 | Continuous way timber dynamic modulus of elasticity bias pressure roller detection Apparatus and method for |
| CN105403470B (en) * | 2015-12-11 | 2018-07-10 | 福建工程学院 | A kind of device and method of ultrasound electric machine test bamboo chip bending strength |
| CN106353175B (en) * | 2016-08-11 | 2018-11-13 | 哈尔滨工业大学 | A kind of device for strength of wood classification |
| CN108254540B (en) * | 2018-02-07 | 2023-08-04 | 中国林业科学研究院木材工业研究所 | Sawn timber surface quality grade dividing device and sawn timber surface quality grade dividing method |
| CN108325869B (en) * | 2018-02-07 | 2023-05-05 | 国家***北京林业机械研究所 | Sawn timber grading device and sawn timber grading method |
| CN108543718B (en) * | 2018-03-23 | 2020-10-23 | 长春远洋特种工业材料有限公司 | Intelligent grading system for mechanical stress of laminated plate |
| CN110702508B (en) * | 2019-09-19 | 2022-03-18 | 株洲硬质合金集团有限公司 | Bar strength detection device and bar strength detection machine |
| CN111044385A (en) * | 2019-12-24 | 2020-04-21 | 国际竹藤中心 | Bamboo load resistance measuring device and bamboo load resistance measuring method |
| CN112845170B (en) * | 2021-01-07 | 2022-09-30 | 河北光兴半导体技术有限公司 | Method for removing cracked glass substrate |
| CN116973209B (en) * | 2023-09-25 | 2023-12-08 | 中国林业科学研究院木材工业研究所 | Continuous on-line detection device and method for strength grade of sawn timber for structure |
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Address after: 100029, century Hing Yuen Building, 20 yuan an road, Beijing, Chaoyang District Patentee after: BEIJING FORESTRY MACHINERY Research Institute OF THE STATE FORESTRY AND PRAIRIE ADMINISTRATION Address before: 100029, century Hing Yuen Building, 20 yuan an road, Beijing, Chaoyang District Patentee before: Beijing Forestry Machinery Research Institute of State Forestry Administration |
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Effective date of registration: 20211228 Address after: 100091 No. 2 east mansion, Beijing, Haidian District Patentee after: RESEARCH INSTITUTE OF WOOD INDUSTRY, CHINESE ACADEMY OF FORESTRY Address before: 100029, century Hing Yuen Building, 20 yuan an road, Beijing, Chaoyang District Patentee before: BEIJING FORESTRY MACHINERY Research Institute OF THE STATE FORESTRY AND PRAIRIE ADMINISTRATION |