CN104786256B - A kind of acoustical material test specimen cutting press - Google Patents

A kind of acoustical material test specimen cutting press Download PDF

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CN104786256B
CN104786256B CN201510232747.4A CN201510232747A CN104786256B CN 104786256 B CN104786256 B CN 104786256B CN 201510232747 A CN201510232747 A CN 201510232747A CN 104786256 B CN104786256 B CN 104786256B
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cutter
motor
nut
cutting
acoustical material
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CN104786256A (en
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王倩
王登峰
滕达
陈静
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Jilin University
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Jilin University
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Abstract

A kind of acoustical material test specimen cutting press, relate to acoustical material field, the efficiency of solution prior art cutting sample is low, edge out-of-flatness, cause that sample material has gap with tube wall, causes leakage sound when putting into standing wave tube test, accurate Material acoustic performance can not be recorded, and then existence affects the problems such as the accuracy of material property testing data, it is made up of bracket assembly, drive assembly and cutting tool assembly.This test specimen cutting press dress worm type of reduction gearing with two power shafts, is respectively mounted drive motor and operation handle, it is achieved motor drives the working method two kinds different with manual operation;The cutter of this cutting machine and nut are spirally connected, and nut is arranged on leading screw, and when leading screw rotates, cutter moves up and down along leading screw together with nut, it is achieved the cutting operation of sample;Being provided with upper and lower two travel switches on cutting machine backboard, when tool motion to the stop up and down set, guiding mechanism can cut off drive motor and powers, it is to avoid motion crossed by cutter.

Description

A kind of acoustical material test specimen cutting press
Technical field
The present invention relates to acoustical material field, be specifically related to a kind of acoustical material test specimen cutting press, the standing wave tube acoustical material smooth rounded material sample of test can be cut by motor-driven and manual methods conveniently and efficiently by means of this cutting machine people.
Background technology
Acoustics package design and field of noise control at automobile vibration noise, it is necessary to know the acoustical behavior of various material, in order to choose car acpistocs package design and noise control required acoustical material targetedly, effectively control automobile noise.This performance being accomplished by measuring various acoustical materials with standing-wave-tube method, when carrying out performance of accoustic material test with standing-wave-tube method, tested sample is had strict form and dimensional precision requirement by standing wave tube.But specimen finish size is had different requirements by different standing wave tube test systems, according to ISO1053-ASTME-1050 standard, specimen finishWithThree kinds, specimen length is usually no more than 100mm, and for obtaining the required standard specimen of test, this is accomplished by a kind of cutting equipment that can change cutting tool size;Acoustical material is manually cut out by conventional commonly used shears or other light instruments, and test acoustical material sample mostly is sponge, Caulis et Folium Lini, acrylon felt, leather, the material of the not easily cutting such as glass fibre cotton, when acoustical material is thicker, the light instruments such as shears are used to be difficult to accurately be cropped to required standard specimen, even if relatively thin 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 is pole out-of-flatness also, sample material has gap with tube wall when putting into standing wave tube test, 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, 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, worm type of reduction gearing carry its tools can also be driven either manually or by crank to move up and down by less power and cut sample, cutting efficiency is high, the sample cut out is smooth, precision is high, can meet standing wave tube very well to performance of accoustic material test request.
Summary of the invention
The present invention solves that the cutting of acoustical material sample is existed circularity by prior art and cylindricity cannot ensure, and the efficiency of cutting sample is low, edge out-of-flatness, cause that sample material has gap with tube wall, causes leakage sound when putting into standing wave tube test, accurate Material acoustic performance can not be recorded, and then existence affects the problems such as the accuracy of material property testing data, it is provided that a kind of acoustical material test specimen cutting press.
A kind of acoustical material test specimen cutting press, including bracket assembly, drive assembly and cutting tool assembly;Described bracket assembly includes top board, backboard, reinforcement plate and base plate;Described drive assembly includes handle, flat key, worm type of reduction gearing, sleeve, motor, upper stroke switch and lower stroke switch;Cutting tool assembly includes leading screw, stop nut, cutter, guide post, jump ring and bearing;It is connected respectively through bolt between described top board and backboard, between top board and reinforcement plate, between backboard and reinforcement plate and between base plate with backboard;The cant board of described motor and top board is bolted;Described upper stroke switch and lower stroke switch are connected with motor by electric wire;And be bolted on backboard;Worm type of reduction gearing and top board are bolted, it is connected respectively through flat key between described handle and worm type of reduction gearing, between worm type of reduction gearing and sleeve and between sleeve with motor, do not get through in the middle of described sleeve, middle left side plan axially positions with worm type of reduction gearing output shaft end, and right middle plane and motor output shaft end axially position;
The ring flange on described leading screw top and worm type of reduction gearing output shaft ring flange are bolted;Described cutter is connected by three bolts with the ring flange of nut, is additionally provided with three holes on described ring flange circumference, for the acoustical material sample staying in cutter after taking out cutting;One end of described guide post and cutter are spirally connected, and one end shaft shoulder of the other end of guide post and bearing axially positions, and the other end of bearing is fixed by jump ring;Described bearing coordinates with backboard upper hopper chute, it is achieved the guiding to cutter;Described leading screw bottom screws in stop nut, it is achieved the locking to nut.
Beneficial effects of the present invention: acoustical material test specimen cutting press of the present invention, system can be tested for standing wave tube performance of accoustic material 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 conveniently and efficiently.
Concrete embody following 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, it is possible to be respectively mounted drive motor and operation handle, it is achieved motor drives the working method two kinds different with manual operation.
2. a kind of acoustical material test specimen cutting press of the present invention adopts worm type of reduction gearing to have relatively big speed ratio, can reduce the input torque of drive motor, reduce the size of drive motor, power and cost, when with handle manual operation, it is possible to 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, it is uniformly distributed with three holes along the circumference, it is convenient to after taking out cutting, stay the material sample in cutter simultaneously.
4. acoustical material test specimen cutting press of the present invention, its base plate and three foot bolt and burr adjustable tail margin bolt connections regularly, the levelness of cutter bottom plate can be adjusted by adjusting 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 is bolt and connects between its each parts, compact overall structure is reasonable, volume is little, it is simple to install, and dismantles and mobile, improve transmission efficiency, and to make the acoustical material sample cut out be standard cylindrical, it is possible to ensure the cutting accuracy of sample.
Accompanying drawing explanation
Fig. 1 is the axonometric chart 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 of drive 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, strengthen plate, 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, present embodiment is described in conjunction with Fig. 1 to Fig. 6, a kind of acoustical material test specimen cutting press, it is made up of bracket assembly A, drive assembly B and cutting tool assembly C tri-part.Wherein:
Bracket assembly A includes top board the 28, first bolt the 4, second bolt the 5, the 3rd bolt the 9, the 4th bolt the 10, the 5th bolt the 14, the 8th bolt the 26, the 9th bolt 27, backboard 12, strengthens plate 8 and base plate 18;Drive assembly B includes 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 includes leading screw the 24, the 7th bolt 25, stop nut the 23, the 6th bolt 22, nut 21, cutter 20, guide post 17, jump ring 16 and bearing 15.
In conjunction with Fig. 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 strengthening plate 8, backboard 12 is connected by the 3rd bolt 9 with strengthening plate 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.Not getting through in the middle of sleeve 6, middle left side plan axially positions with worm type of reduction gearing 3 output shaft end, and right middle plane and motor 7 output shaft end axially position, and motor 7 is connected by the second bolt 5 with top board 28 cant board in bracket assembly A.Upper stroke switch 11 and lower stroke switch 13 are connected by electric wire with motor 7.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 of guide post 17 and cutter 20 are spirally connected.The shaft shoulder of one end of bearing 15 and guide post 17 other end axially positions, and 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 in drive assembly B.Described leading screw 24 bottom screws in stop nut 23, it is achieved the locking to nut 21.
Worm type of reduction gearing 3 described in present embodiment has relatively big speed ratio, can reduce the input torque of drive motor, reduces the size of drive motor, power and cost, when using manual operation, reaches labour-saving purpose;Mostly being bolt between described each parts to connect, compact overall structure is reasonable, and volume is little, it is simple to install, and dismantles and mobile.
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, it is achieved the cutting operation of sample;Cutter 20 and guide post 17 are spirally connected, and guide post 17 and bearing 15 are respectively through 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 process rotates, and the sliding friction being directed between bar 17 and backboard 12 chute becomes rolling friction, improves transmission efficiency.Described cutter 20 is to be processed into by round seamless steel pipe, and the cutting edge of cutter 20 is internal is cylindrical, and outside is that cone tilts to the center of circle, so that the acoustical material sample cut out is standard cylindrical, it is possible to ensure the cutting accuracy of sample.
Present embodiment can be cut by changing cutter 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, for the acoustical material sample staying in cutter after taking out cutting simultaneously.
In present embodiment, foot bolt and a burr adjustable tail margin bolt 19 are connected base plate 18 regularly with three, it is possible to adjust the levelness of cutter bottom plate by adjusting 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; nut 21 and cutter 20 is promoted to 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 contacted with the upper stroke switch 11 being fixed on by bolt 10 on backboard 12; bearing 15 is stirred upper stroke switch 11 and is cut off motor 7 and power; cutter 20 is made to stop mobile, thus protecting cutting machine.When nut 21 is along guide screw movement to bottom dead center position, stop nut 23 is possible to prevent nut 21 to continue to move to because of not locking, it is prevented that nut 21 comes off when not installing cutter 20.
The apolegamy of the motor in cutting machine described in present embodiment and employing manually apply the computational methods of power:
In performance of accoustic material standing wave tube testing experiment, it is necessary to the acoustical material of cutting mostly is sponge, Caulis et Folium Lini, and acrylon felt, leather, glass fibre cotton etc., required cutting force is all within the scope of 100kN;According to ISO1053-ASTME-1050 standard, the specimen length needing cutting is usually no more than 100mm, therefore cutter shift motion is taken as 100mm, in order to both ensure sample cut efficiency when motor drives, cutter will not being made again to move up and down excessive velocities and bring potential safety hazard, taking cutter along the upper and lower speed of leading screw is 200mm/min.Checking in from Materials Handbook, the dry friction coefficient μ between leading screw and nut is generally 0.1~0.17, takes=0.1.The leading screw of its pitch 4mm, lead angle 6 °, radius 10mm is chosen from conventional screw.Accordingly, it is determined that go out the structure of test specimen cutting press and design parameter is as shown in table 1, according to the parameter in table one, worm type of reduction gearing and drive motor 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, formula (1) calculate the gear ratio of worm type of reduction gearing.
i = n l v = 28 - - - ( 1 )
In formula: v is cutter translational speed, n is Rated motor rotating speed, and l is leading screw pitch, and i is the gear ratio of worm type of reduction gearing.
Gear ratio requirement according to 1:28, it is possible to match out worm type of reduction gearing, the SJA50 type worm type of reduction gearing wire distribution thick stick elevator structure that this test specimen cutting press selects gear ratio to be 28.
Two, drive motor apolegamy
Drive motor torque is calculated by formula (2), and is calculated the drive motor power of required coupling by formula (3).
T = μ F R cos ψ i - - - ( 2 )
P = T n 9550 - - - ( 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 be calculated drive motor torque T=3.55N m by formula (2), drive motor power P=0.52kW is calculated by formula (3), can being driven type selecting and the coupling of motor 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, the maximum driving force needed for swinging handle can be calculated by formula (4).
F 1 = T ′ l 1 - - - ( 4 )
In formula: F1For handle power, l1For handle radius, T ' is worm type of reduction gearing power shaft moment.It is=23.7N that parameter in substitution table 1 can calculate the maximum grip power needing applying, and this value can apply in the scope of power ordinary person, and comparatively laborsaving, meets requirement.
Detailed description of the invention two, present embodiment are two kinds of methods of the carrying out cutting acoustical material adopting a kind of acoustical material test specimen cutting press described in detailed description of the invention one:
One, adopt power cutting acoustics material sample, even if with motor 7 drive cutting machine cutting acoustical material sample detailed process be: in conjunction with Fig. 6;
First take off handle 1 and connect the flat key 2 of handle 1 and worm type of reduction gearing 3 power shaft.Opening motor 7, drive worm type of reduction gearing 3 and leading screw 24 to rotate, when nut 21 rises to, along leading screw, the position that the bearing 15 that guide post 17 connects touches upper stroke switch 11, upper stroke switch 11 cuts off that motor is powered, cutter 20 stops upper shifting.
Select the cutter 20 of dress suitable diameter size on cutting machine on nut 21 according to sample split requirement.Work platforms is placed acoustical material sample, reversely opening 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-out motor is powered, cutter 20 stop motion.Reversely opening motor 7 makes cutter 20 move up, and takes out, by three holes uniform above cutter 20, the acoustical material sample that cutting is complete, 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 and connect the second bolt 5 that motor 7 is connected with top board 28, take off motor 7 and sleeve 6.Coupling together for later used with top board 28 by the second bolt 5 by motor 7 again, now owing to 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.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, select the cutter 20 of dress suitable diameter size on cutting machine on nut 21 according to sample split requirement, place the acoustical material sample to 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 reversely swinging handle 1 makes cutter 20 and nut 21 move along leading screw 24, takes out, by three holes uniform above cutter 20, the acoustical material sample that cutting is complete, namely completes the manual cutting of an acoustical material sample.

Claims (6)

1. an acoustical material test specimen cutting press, including bracket assembly (A), drive assembly (B) and cutting tool assembly (C);It is characterized in that,
Described bracket assembly (A) includes top board (28), backboard (12), strengthens plate (8) and base plate (18);
Described drive assembly (B) includes 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) includes leading screw (24), stop nut (23), cutter (20), guide post (17), jump ring (16) and bearing (15);
It is connected respectively through bolt between described top board (28) with backboard (12), between top board (28) and reinforcement plate (8), between backboard (12) and reinforcement plate (8) and between base plate (18) with backboard (12);
The cant board of described motor (7) and top board (28) is bolted;Described upper stroke switch (11) and lower stroke switch (13) are connected with motor (7) by electric wire;And be bolted on backboard (12);Worm type of reduction gearing (3) and top board (28) are bolted, it is connected respectively through flat key (2) between described handle (1) with worm type of reduction gearing (3), between worm type of reduction gearing (3) and sleeve (6) and between sleeve (6) with motor (7), do not get through in the middle of described sleeve (6), middle left side plan axially positions with worm type of reduction gearing (3) output shaft end, and right middle plane and motor (7) output shaft end axially position;
The ring flange on described leading screw (24) top and worm type of reduction gearing (3) output shaft ring flange are bolted;Described cutter (20) is connected by three bolts with the ring flange of nut (21), is additionally provided with three holes on described ring flange circumference, for the acoustical material sample staying in cutter after taking out cutting;One end of described guide post (17) and cutter (20) are spirally connected, one end shaft shoulder of the other end of guide post (17) and bearing (15) axially positions, and the other end of bearing (15) is fixed by jump ring (16);Described bearing (15) coordinates with backboard (12) upper hopper chute, it is achieved the guiding to cutter (20);Described leading screw (24) bottom screws in stop nut (23), it is achieved 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, adjust the levelness of cutter bottom plate (18) by adjusting 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, nut (21) and cutter (20) is promoted to 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, makes cutter (20) stop 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 made to stop mobile, stop nut (23) prevents nut (21) not locking from continuing to move to, it is prevented that nut (21) comes off when not installing 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, is respectively used to install motor (7) and handle (1), it is achieved motor drives and two kinds of working methods of manual operation.
5. a kind of acoustical material test specimen cutting press according to claim 1, it is characterised in that change various sizes of cutter (20) 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 to be processed into by round seamless steel pipe, and the cutting edge of cutter (20) is internal is cylindrical, and outside is cone and tilts to the center of circle.
CN201510232747.4A 2015-05-08 2015-05-08 A kind of acoustical material test specimen cutting press Active CN104786256B (en)

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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
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

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US5647265A (en) * 1993-06-30 1997-07-15 The United States Of America As Represented By The Secretary Of The Navy Tool and system for machining a round strand
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