CN102426152B - Metal-timber friction test platform - Google Patents

Metal-timber friction test platform Download PDF

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Publication number
CN102426152B
CN102426152B CN 201110372183 CN201110372183A CN102426152B CN 102426152 B CN102426152 B CN 102426152B CN 201110372183 CN201110372183 CN 201110372183 CN 201110372183 A CN201110372183 A CN 201110372183A CN 102426152 B CN102426152 B CN 102426152B
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China
Prior art keywords
anchor clamps
arm
metal
force
synchronous pulley
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Expired - Fee Related
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CN 201110372183
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CN102426152A (en
Inventor
王慰祖
杨洲
张伟栋
吴良军
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South China Agricultural University
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South China Agricultural University
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Abstract

The invention discloses a metal-timber friction test platform, which comprises a transmission system, a measurement system and a data acquisition system, wherein the transmission system consists of a motor, a small synchronous belt wheel, a synchronous belt, a large synchronous belt wheel and a main shaft; the measurement system consists of a clamp, an arm of force, a loading arm and a linear variable differential transformer (LVDT) sensor; the data acquisition system consists of a data acquisition instrument and a computer; the arm of force is deformed by timber-metal friction, so that the contact of the LVDT sensor on the loading arm produces displacement; and a displacement signal is processed by the data acquisition instrument and output through the computer. The metal-timber friction test platform has the characteristics of high precision, low construction cost, capacity of measuring different sections of timber and the like, and is suitable for research on the friction performance of the timber.

Description

A kind of metal-timber friction test platform
Technical field
The present invention relates to the surveying instrument field, particularly a kind of metal-timber friction test platform that utilizes linear movement pick-up (LVDT) to measure friction force between metal and the timber.
Background technology
At present domestic friction test platform is generally for the rubbing wear between the metal, common is pin disc type friction test platform, that the mode of utilizing foil gauge to measure arm of force distortion is measured friction force, the foil gauge signal is by electric bridge and signal processing circuit, again by data collecting card input computer, its measuring result error is larger, and stability is all relatively poor.The manufacture test platform of offshore company such as CSM company is expensive, often up to hundreds thousand of Renminbi.Patent CN1645103A discloses a kind of little rub measurement device, it is included in and fixes a two-dimentional force cell that adopts cantilever design on the two-dimension displacement platform, utilize non-contact displacement transducer to measure friction force, but this non-contact displacement transducer is when the distortion that direct measurement friction force causes, its measuring accuracy is lower, has certain measuring error.In addition, all can relate to the friction of metal and timber in fields such as timber processing, fruit tree machineries, because the design feature of timber, branch self, need to measure the friction factor of varying cross-section, need special-purpose clamping design, domestic this type of surveying instrument is less at present, has brought difficulty for the scientific research in these fields.
Summary of the invention
The object of the invention is to overcome the shortcoming that exists in the prior art, provide that a kind of price is lower, precision is higher, be applicable to the metal-timber friction test platform of friction measurement between timber and the metal.
Purpose of the present invention is achieved through the following technical solutions:
A kind of metal-timber friction test platform comprises kinematic train, measuring system and data acquisition system (DAS); Kinematic train is comprised of motor 1, small synchronous pulley 2, Timing Belt 3, large synchronous pulley 4 and main shaft 5; Measuring system is comprised of anchor clamps 7, the arm of force 8, loading arm 10 and LVDT sensor 11; Data acquisition system (DAS) is comprised of data collecting instrument and computer; On the lower end output shaft of the motor 1 of vertically placing small synchronous pulley 2 is installed, the lower end of main shaft 5 is equipped with large synchronous pulley 4, and small synchronous pulley 2 is connected with large synchronous pulley 4 by Timing Belt 3, and metal friction dish 6 is fixedly installed in the upper end of main shaft 5; The anchor clamps 7 that are used for clamping sample 9 are installed on the front end of the arm of force 8, the arm of force 8 parallels with loading arm 10 and all is fixed on the arm of force axle 13, LVDT sensor 11 is installed on the loading arm 10, the contact of LVDT sensor 11 just contacts with the side of the arm of force 8, the distortion of the arm of force 8 can make the contact of LVDT sensor 11 be subjected to displacement, and LVDT sensor 11 is connected with computer by data collecting instrument; The load bar 12 that is used for loading counterweight 15 is fixed in the top of loading arm 10, and arm of force axle 13 is connected on the support 14 by pair of bearings, can rotate up and down neatly; Motor 1, main shaft 5 and support 14 all are installed on the platform 16.
The front portion of anchor clamps 7 is comprised of two U-shaped elastic steel sheets, cylindrical sample can be clamped, and the front portion of anchor clamps 7 is connected by the rear portion of bolt with anchor clamps 7, and there is arc track the top at the rear portion of anchor clamps 7, and the anchor clamps front portion can be rotated.
Anchor clamps 7 are bolted in the both sides of anchor clamps fixed block 1; On the anchor clamps fixed block 1 protruding pin is arranged, deep-slotted chip breaker 21 is arranged on the anchor clamps fixed block 2 19; The center of circle of the protruding pin of anchor clamps fixed block 1 overlaps with the circular arc center of circle of the deep-slotted chip breaker 21 of anchor clamps fixed block 2 19, and anchor clamps fixed block 1 is connected with the deep-slotted chip breaker 21 of anchor clamps fixed block 2 19 by bolt 20 and is fixing.Unclamp bolt 20, rotary clamp fixed block 1 then can be adjusted the angle of inclination of anchor clamps 7; Simultaneously, bolt 20 can be determined by the position of adjusting bolt 20 reposition of anchor clamps 7 in 21 li rotations of deep-slotted chip breaker, by this adjusting, can guarantee the applying of wood sample and frictional disk.
The arm of force 8 is made by stalloy, and anchor clamps 7 are installed on the front end of the arm of force 8 by bolt.
Be provided with more than one through hole for LVDT sensor 11 is installed on the loading arm 10.
Be provided with on the platform 16 for the groove 17 of regulating distance between small synchronous pulley 2 and the large synchronous pulley 4.
Be provided with on the platform 16 for the groove of regulating contact position between sample 9 and the metal friction dish 6.
Principle of work of the present invention: the present invention provides driving force by buncher 1, and uses Timing Belt 3 transmissions to slow down, and Timing Belt 3 has the characteristics of the fixing and buffering effect of ratio of gear; Large synchronous pulley 4 after the deceleration drives metal friction dish 6 by a main shaft 5 and rotates, and metal friction dish 6 contacts with wood sample 9 and rubs; Wood sample 9 usefulness anchor clamps 7 are fixing, and these anchor clamps 7 can be adjusted angle, and the bottom surface of sample 9 and the surperficial keeping parallelism of metal friction dish 6 are contacted; Anchor clamps 7 are installed on the arm of force 8, and the arm of force 8 can deform because be subject to friction force in friction process; LVDT sensor 11 is installed on the loading arm 10 parallel with the arm of force 8, allow the contact of LVDT sensor 11 contact with the arm of force 8, and in the process that the arm of force 8 deforms, produce displacement, displacement signal is processed by acquisition system and the input computing machine obtains output by software, can be according to deformation displacement measurement amount friction force after the relation of arm of force distortion and friction force is demarcated; The arm of force 8 and loading arm 10 all are fixed on the same arm of force axle 13, and this arm of force axle 13 is connected with support 14 by bearing, guarantee that the arm of force 8 can rotate up and down, and obtain load by the loading on loading arm 10.
The present invention compared with prior art has following advantage and effect:
(1) the present invention utilizes the mode of linear movement pick-up measurement arm of force displacement to measure friction force, utilizes custom-designed sample holder to come the clamping wood sample, utilizes buncher that power is provided, and slow down with Timing Belt, measurement result is accurate, and speed is adjustable, the sample angle is adjustable, impacts less.
(2) price of the present invention is lower, and equipment is simple.
Description of drawings
Fig. 1 is front elevation of the present invention.
Fig. 2 is vertical view of the present invention.
Fig. 3 is the vertical view of anchor clamps of the present invention.
Fig. 4 is the front elevation of anchor clamps of the present invention.
Fig. 5 is the side view of anchor clamps of the present invention.
Wherein, 1, motor; 2, small synchronous pulley; 3, Timing Belt; 4, large synchronous pulley; 5, main shaft; 6, metal friction dish; 7, anchor clamps; 8, the arm of force; 9, sample; 10, loading arm; 11, LVDT sensor; 12, load bar; 13, arm of force axle; 14, support; 15, counterweight; 16, platform; 17, groove; 18, the anchor clamps fixed block one; 19, the anchor clamps fixed block two; 20, bolt; 21, deep-slotted chip breaker.
Embodiment
Below in conjunction with embodiment the present invention is done further detailed description, but embodiments of the present invention are not limited to this.
Embodiment
Metal-timber friction test platform comprises kinematic train, measuring system and data acquisition system (DAS).Kinematic train is comprised of motor 1, small synchronous pulley 2, Timing Belt 3, large synchronous pulley 4 and main shaft 5.Measuring system is comprised of anchor clamps 7, the arm of force 8, loading arm 10 and LVDT sensor 11.Data acquisition system (DAS) is comprised of data collecting instrument and computer.
On the lower end output shaft of the motor 1 of vertically placing small synchronous pulley 2 is installed, the lower end of main shaft 5 is equipped with large synchronous pulley 4, and small synchronous pulley 2 is connected with large synchronous pulley 4 by Timing Belt 3, and metal friction dish 6 is fixedly installed in the upper end of main shaft 5.Buncher 1 reaches the purpose of decelerations, vibration damping by small synchronous pulley 2, Timing Belt 3 and large synchronous pulley 4, and large synchronous pulley 4 drives 6 rotations of metal friction dishes by main shaft 5.
The anchor clamps 7 that are used for clamping sample 9 are installed on the front end of the arm of force 8 by bolt, and the arm of force 8 is made by stalloy, and the arm of force 8 parallels with loading arm 10 and all is fixed on the arm of force axle 13.The load bar 12 that is used for loading counterweight 15 is fixed in the top of loading arm 10.Arm of force axle 13 is connected on the support 14 by pair of bearings, can rotate up and down neatly.Be provided with more than one through hole for LVDT sensor 11 is installed on the loading arm 10.LVDT sensor 11 is installed on the loading arm 10, and the contact of LVDT sensor 11 just contacts with the side of the arm of force 8, and the distortion of the arm of force 8 can make the contact of LVDT sensor 11 be subjected to displacement.
Motor 1, main shaft 5 and support 14 all are installed on the platform 16.Be provided with on the platform 16 for the groove 17 of regulating distance between small synchronous pulley 2 and the large synchronous pulley 4, also be provided with for the groove of regulating contact position between sample 9 and the metal friction dish 6.
LVDT sensor 11 is connected with computer by data collecting instrument, and the output displacement data, directly concerns by demarcating displacement and friction force, displacement data can be converted to frictional force data.
The front portion of anchor clamps 7 is comprised of two U-shaped elastic steel sheets, cylindrical sample can be clamped, and the front portion of anchor clamps 7 is connected by the rear portion of bolt with anchor clamps 7, and there is arc track the top at the rear portion of anchor clamps 7, and the anchor clamps front portion can be rotated.Anchor clamps 7 are bolted in the both sides of anchor clamps fixed block 1; On the anchor clamps fixed block 1 protruding pin is arranged, deep-slotted chip breaker 21 is arranged on the anchor clamps fixed block 2 19; The center of circle of the protruding pin of anchor clamps fixed block 1 overlaps with the circular arc center of circle of the deep-slotted chip breaker 21 of anchor clamps fixed block 2 19, and anchor clamps fixed block 1 is connected with the deep-slotted chip breaker 21 of anchor clamps fixed block 2 19 by bolt 20 and is fixing.Unclamp bolt 20, rotary clamp fixed block 1 then can be adjusted the angle of inclination of anchor clamps 7; Simultaneously, bolt 20 can be determined by the position of adjusting bolt 20 reposition of anchor clamps 7 in 21 li rotations of deep-slotted chip breaker, by this adjusting, can guarantee the applying of wood sample and frictional disk.

Claims (6)

1. a metal-timber friction test platform is characterized in that: comprise kinematic train, measuring system and data acquisition system (DAS); Kinematic train is comprised of motor, small synchronous pulley, Timing Belt, large synchronous pulley and main shaft; Measuring system is comprised of anchor clamps, the arm of force, loading arm and LVDT sensor; Data acquisition system (DAS) is comprised of data collecting instrument and computer; On the lower end output shaft of the motor of vertically placing small synchronous pulley is installed, the lower end of main shaft is equipped with large synchronous pulley, and small synchronous pulley is connected with large synchronous pulley by Timing Belt, and the metal friction dish is fixedly installed in the upper end of main shaft; The anchor clamps that are used for the clamping sample are installed on the front end of the arm of force, the arm of force parallels with loading arm and all is fixed on the arm of force axle, the LVDT installation of sensors is on loading arm, and the contact of LVDT sensor just contacts with the side of the arm of force, and the LVDT sensor is connected with computer by data collecting instrument; The load bar that is used for the loading counterweight is fixed in the top of loading arm, and arm of force axle is connected on the support by pair of bearings; Motor, main shaft and support all are installed on the platform.
2. metal-timber friction test platform according to claim 1, it is characterized in that: the front portion of anchor clamps is comprised of two U-shaped elastic steel sheets, and the front portion of anchor clamps is connected with the rear portion of anchor clamps by bolt, and there is arc track the top at the rear portion of anchor clamps.
3. metal-timber friction test platform according to claim 1, it is characterized in that: anchor clamps are bolted in the both sides of anchor clamps fixed block one; On the anchor clamps fixed block one protruding pin is arranged, on the anchor clamps fixed block two deep-slotted chip breaker is arranged; The center of circle of the protruding pin of anchor clamps fixed block one overlaps with the circular arc center of circle of the deep-slotted chip breaker of anchor clamps fixed block two, and anchor clamps fixed block one is connected with the deep-slotted chip breaker of anchor clamps fixed block two by bolt and is fixing.
4. metal-timber friction test platform according to claim 1 is characterized in that: be provided with more than one through hole for the LVDT sensor is installed on the loading arm.
5. metal-timber friction test platform according to claim 1 is characterized in that: be provided with on the platform for the groove of regulating distance between small synchronous pulley and the large synchronous pulley.
6. metal-timber friction test platform according to claim 1 is characterized in that: be provided with on the platform for the groove of regulating contact position between sample and the metal friction dish.
CN 201110372183 2011-11-21 2011-11-21 Metal-timber friction test platform Expired - Fee Related CN102426152B (en)

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Publication number Priority date Publication date Assignee Title
CN103868846B (en) * 2014-03-19 2016-05-04 哈尔滨工业大学 Frictional Factor of Electric Brush testboard and measuring method thereof
CN103822747B (en) * 2014-03-19 2016-07-06 哈尔滨理工大学 A kind of device for measuring force of rolling friction
CN104749096B (en) * 2015-03-23 2017-07-28 同济大学 A kind of mechanical friction and adhesion coefficient determine device
CN105372141A (en) * 2015-12-07 2016-03-02 奥瑞金包装股份有限公司 Wear resistance test device
CN105547809B (en) * 2016-01-05 2018-05-29 山东大学 ECC axial tension tests DEFORMATION MONITORING SYSTEM and method
CN108037069B (en) * 2017-11-14 2024-02-20 洛阳理工学院 Pin disc friction testing machine

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Publication number Priority date Publication date Assignee Title
CN1645103A (en) * 2005-01-27 2005-07-27 上海交通大学 Microfriction testers
CN101526463A (en) * 2009-04-23 2009-09-09 哈尔滨工业大学 Experimental apparatus for testing sliding friction property of friction materials

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CN101526463A (en) * 2009-04-23 2009-09-09 哈尔滨工业大学 Experimental apparatus for testing sliding friction property of friction materials

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