CN104786256A - Acoustic material sample cutting machine - Google Patents
Acoustic material sample cutting machine Download PDFInfo
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- CN104786256A CN104786256A CN201510232747.4A CN201510232747A CN104786256A CN 104786256 A CN104786256 A CN 104786256A CN 201510232747 A CN201510232747 A CN 201510232747A CN 104786256 A CN104786256 A CN 104786256A
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Abstract
The invention provides an acoustic material sample cutting machine and relates to the field of acoustic materials. The acoustic material sample cutting machine solves the problems that in the prior art, sample cutting efficiency is low and edges are irregular, consequently when a sample material is placed in a standing wave tube to be tested, a gap is formed between the sample material and the tube wall, sound is leaked, precise material acoustic performance cannot be measured, and material performance test data accuracy is affected. The acoustic material sample cutting machine is formed by a support assembly, a drive assembly and a cutter assembly. The sample cutting machine is provided with a worm gear reducer with two input shafts, a drive motor and an operating handle are installed on the two input shafts respectively, and two different working modes of motor drive and manual operation are achieved; a cutter and a nut of the cutting machine are in screwed connection, the nut is installed on a screw rod, when the screw rod rotates, the cutter and the nut move along the screw rod vertically, and cutting operation of a sample is achieved; an upper travel switch and a lower travel switch are installed on a back plate of the cutting machine, so that when the cutter moves to an upper set stop point and a lower set stop point, a power supply to the drive motor will be switched off through a guide mechanism, and excessive motion of the cutter is avoided.
Description
Technical field
The present invention relates to acoustical material field, be specifically related to a kind of acoustical material test specimen cutting press, the smooth rounded material sample of standing wave tube acoustical material test can be cut by motor-driven and manual methods quickly and easily by means of this cutting machine people.
Background technology
In acoustics package design and the field of noise control of automobile vibration noise, need the acoustical behavior knowing various material, to choose the acoustical material required for car acpistocs package design and Noise measarement targetedly, effectively control automobile noise.This just needs the performance measuring various acoustical material with standing-wave-tube method, and when carrying out performance of accoustic material test with standing-wave-tube method, standing wave tube has strict form and dimensional precision requirement to tested sample.But different standing wave tube test macros has different requirements to specimen finish size, according to ISO 1053-ASTM E-1050 standard, specimen finish
with
three kinds, specimen length is generally no more than 100mm, and for obtaining the required standard specimen of test, this just needs a kind of cutting equipment can changing cutting tool size, often used scissors or other light instruments manually to cut out acoustical material in the past, and test acoustical material sample mostly is sponge, flax, acrylic fibers felt, leather, the material of the not easily cutting such as glass fibre cotton, when acoustical material is thicker, the light instruments such as scissors are used to be difficult to accurately be cropped to required standard specimen, even if thinner acoustical material, manual method cuts out the circularity of sample and cylindricity also cannot ensure, the efficiency of cutting sample is also very low, edge also pole out-of-flatness, sample material is put into when standing wave tube is tested and tube wall has gap, cause leakage sound, accurate Material acoustic performance can not be recorded, greatly have impact on the accuracy of performance of accoustic material test data.
For this reason, the invention discloses a kind of acoustical material test specimen cutting press, directly acoustical material is positioned on workbench during cutting sample, choose suitable Cutting tool installation manner on cutting machine, experimenter is operated cutting machine and controls motor and moved up and down by worm type of reduction gearing carry its tools and cut sample, also can manually drive worm type of reduction gearing carry its tools to move up and down by crank by less power and cut sample, cutting efficiency is high, the sample cut out is smooth, precision is high, and can meet standing wave tube is very well by test request to performance of accoustic material.
Summary of the invention
The present invention is that the cutting of solution prior art to acoustical material sample exists circularity and cylindricity cannot ensure, and the efficiency of cutting sample is low, edge out-of-flatness, cause sample material put into standing wave tube test time and tube wall have gap, cause leakage sound, accurate Material acoustic performance can not be recorded, and then the problems such as the accuracy of material property testing data are learned in existence impact, provide a kind of acoustical material test specimen cutting press.
A kind of acoustical material test specimen cutting press, comprises bracket assembly, drives assembly and cutting tool assembly; Described bracket assembly comprises top board, backboard, reinforcement version and base plate; Described driving assembly comprises handle, flat key, worm type of reduction gearing, sleeve, motor, upper stroke switch and lower stroke switch; Cutting tool assembly comprises leading screw, stop nut, cutter, guide post, jump ring and bearing; Described top board is with between backboard, between top board with reinforcement version, be connected respectively by bolt between backboard with stiffener and between base plate with backboard; The cant board of described motor and top board is bolted; Described upper stroke switch is connected with motor by electric wire with lower stroke switch; And be bolted on backboard; Worm type of reduction gearing and top board are bolted, described handle is with between worm type of reduction gearing, be connected respectively by flat key between worm type of reduction gearing with sleeve and between sleeve with motor, do not get through in the middle of described sleeve, middle left side plan and worm type of reduction gearing output shaft end axial location, right middle plane and motor output shaft end axial location;
Ring flange and the worm type of reduction gearing output shaft ring flange on described leading screw top are bolted; Described cutter is connected by three bolts with the ring flange of nut, described ring flange circumferentially be also provided with three holes, for staying the acoustical material sample in cutter after taking out cutting; One end and the cutter of described guide post are spirally connected, the other end of guide post and one end shaft shoulder axial location of bearing, and the other end of bearing is fixed by jump ring; Described bearing coordinates with backboard upper hopper chute, realizes the guiding to cutter; Described leading screw bottom screws in stop nut, realizes the locking to nut.
Beneficial effect of the present invention: acoustical material test specimen cutting press of the present invention, can be standing wave tube performance of accoustic material test macro and cut standard material sample, can obtain by means of this cutting machine experimenter the cylindrical acoustics material sample that flatness is good, precision is high quickly and easily.
Below imbody some:
1. the worm type of reduction gearing in a kind of acoustical material test specimen cutting press of the present invention has two power shafts, can install drive motors and operating grip respectively, realizes motor and drives the working method different with manual operation two kinds.
2. a kind of acoustical material test specimen cutting press of the present invention adopts worm type of reduction gearing to have comparatively big speed ratio, can reduce the input torque of drive motors, reduces the size of drive motors, power and cost, when with handle manual operation, can save manpower.
3. the cutter of acoustical material test specimen cutting press of the present invention and nut are spirally connected, cutter can be changed to cut the sample of different-diameter size, to meet the experimental test requirement to various sample, on nut flange, be uniformly distributed with three holes along the circumference simultaneously, after cutting can being taken out easily, stay the material sample in cutter.
4. acoustical material test specimen cutting press of the present invention, foot bolt and a burr adjustable tail margin bolt are connected its base plate regularly with three, the levelness of cutter bottom plate can be adjusted by adjustment foundation bolt screw-in depth, effectively prevent because operating table surface injustice causes base plate tilt and rock.
5. acoustical material test specimen cutting press of the present invention, mostly be bolt between its each parts to connect, compact overall structure is reasonable, volume is little, be convenient to install, dismantle and move, improve transmission efficiency, and make the acoustical material sample cut out be standard cylindrical, the cutting accuracy of sample can be ensured.
Accompanying drawing explanation
Fig. 1 is the stereogram of a kind of acoustical material test specimen cutting press of the present invention;
Fig. 2 is the decomposing schematic representation of Fig. 1;
Fig. 3 is the perspective exploded view of Fig. 1 medium-height trestle assembly;
Fig. 4 is the perspective exploded view driving assembly in Fig. 1;
Fig. 5 is the perspective exploded view of cutting tool assembly in Fig. 1;
Fig. 6 is the schematic diagram adopting a kind of acoustical material test specimen cutting press of the present invention to cut acoustical material sample.
1, handle, 2, flat key, 3, worm type of reduction gearing, 4, the first bolt, the 5, second bolt, 6, sleeve, 7, motor, 8, stiffener, the 9, the 3rd bolt, 10, the 4th bolt, 11, upper stroke switch, 12, backboard, 13, lower stroke switch, the 14, the 5th bolt, 15, bearing 16, jump ring, 17, guide post, 18, base plate, 19, foundation bolt, 20, cutter, 21, nut, the 22, the 6th bolt, 23, stop nut, 24, leading screw, the 25, the 7th bolt, the 26, the 8th bolt, 27, the 9th bolt, 28, top board.
Detailed description of the invention
Detailed description of the invention one, composition graphs 1 to Fig. 6 illustrate present embodiment, a kind of acoustical material test specimen cutting press, by bracket assembly A, drive assembly B and cutting tool assembly C tri-part to form.Wherein:
Bracket assembly A comprises top board 28, first bolt 4, second bolt 5, the 3rd bolt 9, the 4th bolt 10, the 5th bolt 14, the 8th bolt 26, the 9th bolt 27, backboard 12, strengthens version 8 and base plate 18; Assembly B is driven to comprise handle 1, flat key 2, worm type of reduction gearing 3, sleeve 6, motor 7, upper stroke switch 11 and lower stroke switch 13.Cutting tool assembly C comprises leading screw 24, the 7th bolt 25, stop nut 23, the 6th bolt 22, nut 21, cutter 20, guide post 17, jump ring 16 and bearing 15.
Composition graphs 3 to Fig. 5, described top board 28 is connected by the first bolt 4 with backboard 12, top board 28 is connected by the 8th bolt 26 with reinforcement version 8, backboard 12 is connected by the 3rd bolt 9 with stiffener 8, base plate 18 is connected by the 5th bolt 14 with backboard 12, described handle 1 is connected by flat key 2 with worm type of reduction gearing 3, and worm type of reduction gearing 3 is connected by flat key 2 with sleeve 6, and sleeve 6 is connected by flat key 2 with motor 7.Do not get through in the middle of sleeve 6, middle left side plan and worm type of reduction gearing 3 output shaft end axial location, right middle plane and motor 7 output shaft end axial location, motor 7 is connected by the second bolt 5 with top board 28 cant board in bracket assembly A.Upper stroke switch 11 is connected by electric wire with motor 7 with lower stroke switch 13.Worm type of reduction gearing 3 is fixed by the 9th bolt 27 with the top board 28 in bracket assembly A.Upper stroke switch 11 is fixed by the 4th bolt 10 with the backboard 12 in bracket assembly A, and wherein cutter 20 is connected by the 6th bolt 22 with nut 21.One end and the cutter 20 of guide post 17 are spirally connected.One end of bearing 15 and the shaft shoulder axial location of guide post 17 other end, bearing 15 other end jump ring 16 is fixed.Leading screw 24 ring flange on top is connected by the 7th bolt 25 with the worm type of reduction gearing 3 output shaft ring flange driven in assembly B.Described leading screw 24 bottom screws in stop nut 22, realizes the locking to nut 20.
Worm type of reduction gearing 3 described in present embodiment has comparatively big speed ratio, can reduce the input torque of drive motors, reducing the size of drive motors, power and cost, when using manual operation, reaching labour-saving object; Mostly be bolt between described each parts to connect, compact overall structure is reasonable, and volume is little, is convenient to install, and dismantles and moves.
Cutter 20 described in present embodiment and nut 21 are spirally connected, and nut 21 is arranged on leading screw 24, and when leading screw 24 rotates, cutter 20 moves up and down along leading screw 24 together with nut 21, realizes the cutting operation of sample; Cutter 20 and guide post 17 are spirally connected, and guide post 17 and bearing 15 are respectively by the shaft shoulder and jump ring 16 axial restraint.Bearing 15 coordinates with backboard 12 chute in bracket assembly A, realize the guiding to cutter 20, prevent from cutter 20 from moving both vertically on leading screw 24 in process to rotate, and the sliding friction between guide post 17 and backboard 12 chute is become rolling friction, improve transmission efficiency.Described cutter 20 is processed into by round seamless steel pipe, and the cutting edge inside of cutter 20 is cylindrical, and outside is conical to center of circle inclination, thus makes the acoustical material sample cut out be standard cylindrical, can ensure the cutting accuracy of sample.
The sample of different-diameter size can be cut by changing cutter in present embodiment, to meet the experimental test requirement to various sample, simultaneously on nut flange, be uniformly distributed with three holes along the circumference, for staying the acoustical material sample in cutter after taking out cutting.
In present embodiment, foot bolt and a burr adjustable tail margin bolt 19 are connected base plate 18 regularly with three, the levelness of cutter bottom plate can be adjusted by adjustment foundation bolt 19 screw-in depth, effectively prevent because operating table surface injustice causes base plate tilt and rock.
In present embodiment, motor 7 drives leading screw to rotate; promotion nut 21 and cutter 20 move up and down along leading screw; when driving guide post 17 and bearing 15 to move to top dead center position in the chute of backboard 12; bearing 15 is with by bolt 10, the upper stroke switch 11 be fixed on backboard 12 contacts; bearing 15 is stirred upper stroke switch 11 and is cut off motor 7 and power; cutter 20 is stopped mobile, thus protection cutting machine.When nut 21 is along guide screw movement to bottom dead center position, it is mobile that stop nut 23 can prevent nut 21 from continuing because of not locking, prevents nut 21 from coming off when not mounting cutter 20.
The apolegamy of the motor in the cutting machine described in present embodiment and the computational methods of employing manually applied force are:
In performance of accoustic material standing wave tube testing experiment, need the acoustical material of cutting mostly to be sponge, flax, acrylic fibers felt, leather, glass fibre cotton etc., required cutting force is all within the scope of 100kN; According to ISO1053-ASTM E-1050 standard, the specimen length cut is needed generally to be no more than 100mm, therefore cutter shift motion is taken as 100mm, in order to both ensure sample cut efficiency when motor drives, cutter can not be made again to move up and down excessive velocities and bring potential safety hazard, getting cutter along the upper and lower speed of leading screw is 200mm/min.Check in from Materials Handbook, the dry friction coefficient μ between leading screw and nut is generally 0.1 ~ 0.17, get=0.1.The leading screw of its pitch 4mm, lead angle 6 °, radius 10mm is chosen from conventional screw.Therefore, determine the structure of test specimen cutting press and design parameter as shown in table 1, according to the parameter in table one, worm type of reduction gearing and drive motors are matched.
Table 1 acoustical material test specimen cutting press important technological parameters
One, worm type of reduction gearing is chosen
According to the parameter in table 1, calculated the gearratio of worm type of reduction gearing by formula (1).
In formula: v is cutter translational speed, n is Rated motor rotating speed, and l is leading screw pitch, and i is the gearratio of worm type of reduction gearing.
According to the gearratio requirement of 1:28, worm type of reduction gearing can be matched out, this test specimen cutting press select gearratio be 28 SJA50 type worm type of reduction gearing wire distribution thick stick elevator structure.
Two, drive motors apolegamy
Drive motors torque is calculated by formula (2), and calculates the drive motors power of required coupling by formula (3).
In formula: T is Motor torque, Ψ is guide screw lead angle, and μ is coefficient of friction; R is leading screw radius, and F is cutting force, and P is power of motor.
The data substituted in table 1 can calculate drive motors torque T=3.55Nm by formula (2), drive motors power P=0.52kW is calculated by formula (3), can carry out the Configuration selection and optimal match of drive motors accordingly, the motor in this test specimen cutting press selects model to be the threephase asynchronous of YS7124.
Three, the calculating of maximum applied force is manually cut
When utilize crank manpower drive test specimen cutting press carry out acoustical material sample cut time, because crank is directly connected with worm type of reduction gearing power shaft, maximum driving force needed for swinging handle can be calculated by formula (4).
In formula: F
1for handle power, l
1for handle radius, T
ifor worm type of reduction gearing power shaft moment.The maximum grip power that parameter in substitution table 1 can calculate to be needed to apply is=23.7N, and this value can apply in the scope of power ordinary person, and comparatively laborsaving, meets the demands.
Detailed description of the invention two, present embodiment are for adopting two kinds of methods of the carrying out cutting acoustical material of a kind of acoustical material test specimen cutting press described in detailed description of the invention one:
One, power cutting acoustics material sample is adopted, even if by the detailed process that motor 7 drives cutting machine to cut acoustical material sample be: composition graphs 6;
First the flat key 2 of handle 1 and connecting handle 1 and worm type of reduction gearing 3 power shaft is taken off.Open motor 7, drive worm type of reduction gearing 3 and leading screw 24 to rotate, when nut 21 along leading screw rise to bearing 15 that guide post 17 connects touch the position of upper stroke switch 11 time, upper stroke switch 11 cuts off feeding electric motors, cutter 20 moves on stopping.
On cutting machine, select the cutter 20 of dress suitable diameter size on nut 21 according to sample split requirement.Workbench is placed acoustical material sample, reverse unlatching motor 7 drives worm type of reduction gearing 3 and leading screw 24 to rotate, nut 21 carry its tools 20 moves down, cut acoustical material gradually, when cutter 20 moves to table plane, acoustical material sample has cut, and the bearing 15 that guide post 17 drives touches lower stroke switch 13, cut off feeding electric motors, cutter 20 stop motion.Reverse unlatching motor 7 makes cutter 20 move up, and takes out the complete acoustical material sample of cutting by three holes uniform above cutter 20, namely completes an acoustical material sample cutting.
Two, manually cutting acoustics material sample is adopted:
Use handle 1 manual operation to carry out acoustical material sample when cutting, first back out the second bolt 5 connecting motor 7 and be connected with top board 28, take off motor 7 and sleeve 6.Motor 7 and top board 28 are coupled together for using afterwards by the second bolt 5, now because branch sleeve 6 is removed, the output shaft of motor 7 departs from the power shaft of worm type of reduction gearing 3 and is connected again.Swinging handle 1 drives worm type of reduction gearing 3 and leading screw 24 to rotate, nut 21 is made to rise to correct position along leading screw, on cutting machine, select the cutter 20 of dress suitable diameter size on nut 21 according to sample split requirement, place the acoustical material sample that will cut on the table.Reverse swinging handle 1, makes cutter 20 move down along leading screw with nut 21, cuts acoustical material gradually, and when cutter 20 moves to contact work top, the cutting of acoustical material sample is complete, stops swinging handle.Then oppositely swinging handle 1 makes cutter 20 and nut 21 move along on leading screw 24, takes out the complete acoustical material sample of cutting, namely complete the manual cutting of an acoustical material sample by three holes uniform above cutter 20.
Claims (6)
1. an acoustical material test specimen cutting press, comprises bracket assembly (A), drives assembly (B) and cutting tool assembly (C); It is characterized in that,
Described bracket assembly (A) comprises top board (28), backboard (12), strengthens version (8) and base plate (18);
Described driving assembly (B) comprises handle (1), flat key (2), worm type of reduction gearing (3), sleeve (6), motor (7), upper stroke switch (11) and lower stroke switch (13);
Cutting tool assembly (C) comprises leading screw (24), stop nut (23), cutter (20), guide post (17), jump ring (16) and bearing (15);
Between described top board (28) with backboard (12), between top board (28) with reinforcement version (8), be connected respectively by bolt between backboard (12) with stiffener (8) and between base plate (18) with backboard (12);
Described motor (7) is bolted with the cant board of top board (28); Described upper stroke switch (11) is connected with motor (7) by electric wire with lower stroke switch (13); And be bolted on backboard (12); Worm type of reduction gearing (3) and top board (28) are bolted, be connected respectively by flat key (2) between described handle (1) with worm type of reduction gearing (3), between worm type of reduction gearing (3) with sleeve (6) and between sleeve (6) with motor (7), do not get through in the middle of described sleeve (6), middle left side plan and worm type of reduction gearing (3) output shaft end axial location, right middle plane and motor (7) output shaft end axial location;
Ring flange and worm type of reduction gearing (3) the output shaft ring flange on described leading screw (24) top are bolted; Described cutter (20) is connected by three bolts with the ring flange of nut (21), described ring flange circumferentially be also provided with three holes, for staying the acoustical material sample in cutter after taking out cutting; One end and the cutter (20) of described guide post (17) are spirally connected, the other end of guide post (17) and one end shaft shoulder axial location of bearing (15), the other end of bearing (15) is fixed by jump ring (16); Described bearing (15) coordinates with backboard (12) upper hopper chute, realizes the guiding to cutter (20); Described leading screw (24) bottom screws in stop nut (22), realizes the locking to nut (21).
2. a kind of acoustical material test specimen cutting press according to claim 1, it is characterized in that, described base plate (18) with three regularly foot bolt and a burr adjustable tail margin bolt (19) be connected, adjusted the levelness of cutter bottom plate (18) by adjustment burr adjustable tail margin bolt (19) screw-in depth.
3. a kind of acoustical material test specimen cutting press according to claim 1, it is characterized in that, described motor (7) drives leading screw (24) to rotate, promotion nut (21) and cutter (20) move up and down along leading screw, guide post (17) and bearing (15) is driven to move in the chute of backboard (12), when bearing (15) contacts with upper stroke switch (11), bearing (15) is stirred upper stroke switch (11) and is cut off motor (7) power supply, cutter (20) is stopped mobile; When bearing (15) contacts with lower stroke switch (13), bearing (15) is stirred lower stroke switch (13) and is cut off motor (7) power supply, cutter (20) is stopped mobile, stop nut (23) prevents nut (21) not locking and continue mobile, prevents nut (21) from coming off when not mounting cutter (20).
4. a kind of acoustical material test specimen cutting press according to claim 1, it is characterized in that, described worm type of reduction gearing (3) has two power shafts, be respectively used to mounted motor (7) and handle (1), realize motor and drive and manual operation two kinds of working methods.
5. a kind of acoustical material test specimen cutting press according to claim 1, is characterized in that, changes the cutter (20) of different size according to the different size of acoustical material.
6. a kind of acoustical material test specimen cutting press according to claim 1 or 5, it is characterized in that, described cutter (20) is processed into by round seamless steel pipe, and the cutting edge inside of cutter (20) is cylindrical, and outside is conical and tilts to the center of circle.
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| CN201510232747.4A CN104786256B (en) | 2015-05-08 | 2015-05-08 | A kind of acoustical material test specimen cutting press |
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| CN201510232747.4A CN104786256B (en) | 2015-05-08 | 2015-05-08 | A kind of acoustical material test specimen cutting press |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110861126A (en) * | 2018-08-27 | 2020-03-06 | 张家港保税区美佳印刷有限公司 | Pressure boost paper cutting equipment |
| CN110861130A (en) * | 2018-08-27 | 2020-03-06 | 张家港保税区美佳印刷有限公司 | Pressurizing paper cutting mechanism |
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