URETHANE SPRINGS. Page

Transcription

1 URETHAE SPRIGS URETHAE SPRIGS Prouct name URETHAES OR HEAVY OAS SQUARE URETHAES OR HEAVY OAS URETHAE STOCK BOCKS URETHAES OR HEAVY OAS EX QX EST ESBT ESU ESUB S SU A Page URETHAE STOCK BOCKS URETHAES OR HEAVY OAS URETHAES WITH COUTERBORE URETHAE SHEETS URETHAE IE PAS E E A C AX CX AZ AZX UT UTH U UH ECOOMY URETHAES URETHAE OAM (POROUS)OR HIGH-EECTIO USE OW REPUSIO URETHAES OW REPUSIO URETHAES WITH COUTERBORE AE AE CE AEX CEX PA PA A A C AX CX AZ AZX OW REPUSIO URETHAE SHEETS UT OW REPUSIO URETHAE IE PAS U

2 [PROUCTS ATA]URETHAE SPRIGS GUIE Physical properties an features of urethane Item Urethanes for heavy loas H type M type S type type Economy type High-eflection type ow repulsion urethane foams(porous) urethanes Harness(Shore A) /A(foam) 7 TUS US US EX QX EST ESBT ESU ESUB A E E A C AX CX AZ AZX UT UTH U UH - - AE AE CE AEX CEX PA PA A A C AX CX AZ AZX UT U Page P.641 ~ P.644 P.29 ~ P P.37 ~ P.3 P.39 P. ~ P.42 Tensile strength(/cm 2 ){/cm 2 } 411{4} 4462{4} 2941{} 313{3} 242{2} 49{} 1176{1} Elongation(%) % moulus(/cm 2 ){ /cm 2 } 17{179} 14{133} 931{9} 372{3} 12{1} - - Repulsion elasticity(%) Tearing strength(/cm){ /cm} 16{123} 1147{117} 39{} 41{46} 66{7} 294{} 343{3} Specific gravity Permanent strain(%) * Operating environment temperature( ) - ~+7 - ~+ - ~+7 Melting point( ) ~ 2 Embrittlement point( ) Characteristics Ignition point( ) 4 Weather resistance Each type has better weather resistance than orinary rubber materials. Water resistance Oil resistance iscoloration eatures Can be use even if expose to a small amount of water.(cannot be use uner conitions of constant water iersion.) Can be use even if expose to a small amount of cutting oil.(cannot be use uner conitions of constant oil iersion.) Becomes iscolore when expose to ultraviolet rays(incluing sunlight), however there is no averse effect on performance. Relatively more iscoloration occurs with high-eflection type urethane foams than with other types. Provies the largest loa resistance, for better contour forming. Because of the small eflection amount, this type can be use only for simple forming. Machining of thin stainless Applications(reference) steel plates or steel plates approximately 2 thick This type has physical properties intermeiate between the H an S types, an can be use for general purposes. Although the loa resistance is lower, the larger eflection amount allows eeper forming. Although the harness is equivalent to general rubber materials, this type has superior abrasion resistance an mechanical strength. Machining of thin Bulging rawing plates of materials such Shallow rawing Guerin metho as aluminum or brass Wheelon metho Although the loa resistance an urability (permanent strain)are somewhat inferior to the M type, the prices are lower. More suitable for smallvolume prouction than the M type. The above figures are actual measurements at room temperature 23, an o not constitute guarantee specifications. *metho of measuring permanent strain(jis K7312) 1)24 hours at 7 with % compression 2)Coole for min. in laboratory at 23 3)Strain is measure. Can be use for high eflection (%max.)an high loa applications. The lateral expansion is about half that of the M type at an equivalent eflection. Because this type is foame urethane, it provies excellent heat raiation performance. Often use as pa cushions an cam return cushions. With low permanent strain an excellent shock absorbing performance, this type can eliver antivibration performance. Vibration proofing Machining of soft materials such as films. Comparison of urethane springs, coil springs, an gas cushions : Excellent : Satisfactory : Slightly poor : Unacceptable Item Cost to loa ratio Machinability High spee enurance stability Permanent strain Initial pressure Operating environment temperatures Urethane springs Coil springs Gas cushions 27

3 [PROUCTS ATA]CORRECT USES A MACHIIG METHOS OR URETHAES [ATA]Relationship between compression ratio an strokes per minute In orer to control heat generation an accumulation an also to improve the enurance lifetime of the urethane spring, pay attention to the compression ratio an the strokes per minute. The following figures show the relationship between various compression ratios an allowable strokes per minute for maintaining goo conitions for heat issipation. Urethanes for heavy loas an low repulsion urethanes Shore A7 9 When shore A7 an 9 urethanes eform, they generate heat through internal friction(hysteresis effect). This phenomenon occurs when the urethane is pressurize rapily. When use for high-spee machining, heat will accumulate insie the urethane. Therefore it is necessary to ajust the eflection accoring to the strokes per minutes as shown in the table below. High-eflection type urethane foams(porous) High-eflection type urethane foams(porous)prouce less heat when compresse than urethanes for heavy loas. This is because the air bubbles insie the urethane eform first, reucing the eformation of the urethane itself. As a result, the lateral expansion ue to compression is half that of urethanes for heavy loas, the heat accumulation is small, an the heat raiation performance is high. However in the same way as urethanes for heavy loas, special attention must be pai to the compression amount an stroke counts, as these can result in eterioration. eflection Recoene range of use for Shore A9 Recoene range of use for Shore A7 eflection C B A A B C iameter ~ ~ 1 Recoene range of use 7 6 Strokes per minute 1 1 Strokes per minute Urethane machining methos an precautions 1Move the material(urethane)as rapily as possible so that heat will not buil up internally. 2Slow machining causes heating of the material(urethane), which results in elasticity loss, causing the saw teeth or cutter blae to become stuck in the material. 3It is important to use a blae that is as sharp an narrow as possible. A.Cutting 1.Urethane can be easily cut with sawing machines, ban saws, or other machines in the same way as steel. 2. When cutting with a lathe, operate the lathe at high spee with a sharp an narrow blae.(this is the best cutting metho in terms of achieving goo workpiece parallelism.) B. lattening 1.Urethane can be flattene by a milling cutter, shaper, or planer. 2.Cutting spee When using a milling machine, the cutter circumferential spee shoul be set to ~ m/min. When using a shaper or planer, the spee shoul be set to the machine's highest spee. C. Grining 1. Use a cooling evice while grining, in the same way as when grining steel. An appropriate grinstone circumferential spee is ~ m/min. 2.The best grinstone material is GC with boning strength K. The most suitable grain size is approximately ~.. rilling 1.rilling can be one in the same manner as with steel. 2. When the tip of the rill is shape as shown below, better rilling can be accomplishe without eforming the material (urethane). 3.The internal iameter of the rille hole will shrink. 2

4 URETHAES OR HEAVY OAS EX..2 V Prouct guie P.27 Proucts ata P.43 = % = % = % Base unit price V 1~19 pieces {7} { 9} {} EX EX {} {13} {19} 7 62 EX EX {19} {27} {} 92 2 EX 3 EX EX EX {2} {39} {} EX 12 Example {}= {}.1972 Shore A9 EX -(C1) Alterations EX - C1 Alteration Coe Spec. 1Coe C1 SGA P.17 EX. V.. C1 C1 C1 chamfering on inner iameter Prouct guie P.27 Proucts ata P.43 Shore A9 29 = % = % = % Base unit price V 1 ~ 19 pieces {77} {} {} 62 EX EX {11} {} {2} 7 62 EX EX {} {2} {4} 92 2 EX 3 EX EX EX {} {4} {62} EX 1 {}= {}.1972 EX

5 SQUARE URETHAES OR HEAVY OAS / URETHAE STOCK BOCKS QX A A V Prouct guie P.27 2 % V=A 1 ~ SS 2 ~ Urethane Shore A9 = % = % = % Base unit price Type A- 1 ~ 19 pieces {} {13} 24 {19} {} {19} {} QX {} {3} {} {} {} {7} QX 7-92 {}= {}.1972 Urethane stock blocks EST ESBT ESU ESUB Base unit price 1 ~ 9 pieces Urethane 2 EST ESBT ESU ESUB Type - EST ESU ESBT ESUB E- * - CB-4 E-1 S14 SU14-1 (1 piece) E7-1 EST 7-1 E7221 ESBT * 7221 E7221 * ESU * 7221 CB12- E9-1 S22 SU22 * ESUB 9-1 (1 piece) E9-1 * 9-1 E-1-1 or ESU an ESUB, only the sizes marke with * are available. Applicable urethanes P.32 Sleeve unit S l SU l2 l3 l1 l ~ SS 1 EST - Urethane l l1 l2 l S S (17 or more) S SU SU22 2 S Shore A9 Base unit price 1 ~ 19 pieces

6 URETHAES OR HEAVY OAS A(Stanar type) V ±.2 ±.2 ±.3 ±.3 ±.2 ±. ±.4 ±.2 ±. Prouct guie P.27 Proucts ata P.43 Shore A9 = % = % = % Base unit price V Type - 1 ~ 19 pieces A { } 7 { }. { } A { 1} 7 { 14}. { 1} A { 17} { 2} { 27} A { 26} 9 { 3} 11.3 { 3} A { 46} { } { 6} A { 79} { 9} {1} A {13} {} {1} A {21} {9} {} A {367} {43} {7} {}= {}.1972 A - Alterations -(C1) A - - C1 Alteration Coe Spec. 1Coe C1 C1 C1 chamfering on inner iameter C1 31

7 URETHAE STOCK BOCKS E ±.2 ±.2 ±.3 V 7 ±.3 ±.2 ±. 9 1 ±.4 ±.2 ±. Prouct guie P.27 Shore A9 = % = % = % Base unit price V Type - 1 ~ 19 pieces 12 4{46} {} 6276{ 6} {79} {9} {1} {19} 22 {} 27. {} E {2} {3} {4} {367} {43} 3 497{7} {} {4} {} {}= {}.1972 E 7221 E(Configurable full length type) ±.2 ±.2 ±.3 7 ±.3 ±.2 ±. 9 1 ±.4 ±.2 ±. Prouct guie P.27 Shore A9 Base unit price 1 ~ 9 pieces Type 1 increments ~ 21 ~ 41 ~ 61 ~ 1 ~ 1 ~ 1 1 ~ 1 ~ 2 14 ~ 7 E ~ E

8 URETHAES OR HEAVY OAS A - ±.2 C ±.2 ±.3 ±.4 Prouct guie P.27 Shore A9 Base unit price Type - Type - 1 ~ 19 pieces - - C C - 7 A - C -. A - C - 11 A - C - A - C - 14 A - C - A - C - A - C - 22 A - C - A - C - A - Configurable full length type AX - ±.2 ±.3 CX ±.2 ±.3 ±.4 ±. Prouct guie P.27 Shore A9 1 increments - CX - 7 AX CX ~ Base unit price 1 ~ 19 pieces ~ 21 ~ 41 ~ 61 ~ 1 ~ 1 ~ 1 1 ~ - AX

9 URETHAES WITH COUTERBORE AZ(Stanar type) ±.2 1±.2 V. 2±.2 Prouct guie P.27 Shore A9 = % = % = % 1 2 M V Type - Base unit price 1 ~ 19 pieces AZ M6 3. { 9}.2 {1} 7. {1} AZ M6 3. {1}.2 {1} 7. {1} AZ {2} {3} {3} M AZ {4} {} {} M {}= {}.1972 AZ - AZX(Configurable full length type) 1±.2 ±.2 ±.3. ±.4 H±. 2±.2 Prouct guie P.27 Shore A9 Type AZX 1 increments ~ ~ 1 ~ M M 6 M M M12 M12 M16 H 1 increments H< M 1 2 M M 14 9 M 1 11 M12 14 M M - H AZX M6-34

10 URETHAE SHEETS UT T 1 ~ 4 ±.3 ~ ±.4 ~ ±. ~ ±1 B A T Prouct guie P.27 Shore A9 A B T Base unit price Type T - A 1 ~ 9 pieces UT UT UT - UTH(Configurable size type) 2 B T 1 ~ 4 ±.3 ~ ±.4 ~ ±. ~ ±1 2 A T Prouct guie P.27 Shore A9 1 increments Type T A B UTH 4 6 ~ ~ 1 increments Type T A B UTH ~ ~ - A - B UTH

11 URETHAE IE PAS U B.3 A.3 Prouct guie P.27 Shore A9 A B Base unit price Type A - 1 ~ 9 pieces U - ±1 + U - ±1 + 7 U 7 - ±1 + U 7- UH(Configurable full length type).3 B ~ 1 ~ 1 ~ A.3 Prouct guie P.27 Shore A9 A B Type A UH UH 7 UH 7 1 increments ~ 1 ~ 1 ~ 1 ~ 1 ~ 1 ~ ~ 1 ~ 1 ~ 1 ~ 1 ~ 1 ~ ~ 1 ~ 1 ~ 1 ~ 1 ~ 1 ~ Base unit price 1 ~ 9 pieces - UH

12 ECOOMY URETHAES AE(Stanar type) V ±.2 ±.3 ±.3 ±.2 ±. Prouct guie P.27 Proucts ata P.43 Shore A9 = % = % = % Base unit price V Type - 1 ~ 19 pieces AE { } 7 { 7}. { 9} AE { 1} 7 { 1}. { 17} AE { 1} { 2} { 2} AE { 2} { 29} { 3} AE { 4} { } { 6} AE { 7} { 9} {} AE {12} {14} {17} AE - Example {}= {}.1972 SGA P. 37

13 AE - ±.2 CE ±.2 ±.3 Prouct guie P.27 Shore A9 Base unit price Type - Type - 1 ~ 19 pieces - - CE CE - 7 AE - CE -. AE - CE - 11 AE - CE - AE - CE - 14 AE - CE - AE - CE - AE - CE - AE - Configurable full length type AEX - ±.2 ±.3 CEX ±.2 ±.3 ±. Prouct guie P.27 Shore A9 - CEX AEX 14 CEX 1 increments ~ Base unit price 1 ~ 19 pieces ~ 21 ~ 41 ~ 61 ~ 1 ~ 1 ~ 1 1 ~ - AEX - 2 3

14 URETHAE OAM(POROUS)OR HIGH-EECTIO USE PA(Stanar type) ±1.4 ±. V ±1.6 Prouct guie P.27 Proucts ata P.43 High-eflection type urethane springs become noticeably iscolore when expose to ultraviolet rays(incluing sunlight), however there is no averse effect on performance. = % = % = % Base unit price V Type - 1 ~ 19 pieces { } { 1} { 1} 36 PA PA { } { 2} { 3} PA { 3} { 4} { 6} PA { 47} { } { 7} PA { 7} {1} {} PA {14} {1} {22} PA {} {} {31} {}= {}.1972 PA - PA ±. ±2. ±1.4 Prouct guie P.27 Please cut before using. P.43 High-eflection type urethane springs become noticeably iscolore when expose to ultraviolet rays(incluing sunlight), however there is no averse effect on performance Base unit price Type - 1 ~ 19 pieces PA - PA - PA - PA - PA - PA - PA 1- Please cut before using. PA -

15 OW REPUSIO URETHAES A(Stanar type) ±.2 ±.3 V ±.2 ±.3 ±. Prouct guie P.27 Proucts ata P.43 Shore A7 = % = % = % Base unit price V Type - 1 ~ 19 pieces A { 3} 7 { 46}.7{ 63} A { 4} { 7} { 93} A { 6} { 96} {127} A {137} {19} {2} A {212} {4} {4} A {3} {47} {} {}= {}.1972 A - A AX(Configurable full length type) A C ±.2 ±.2 ±.3 C CX(Configurable full length type) Prouct guie P.27 Shore A7 AX CX ±.2 ±.3 ±.2 ±.3 ±. Base unit price Type - 1 ~ 19 pieces A - 14 C AX 14 CX Base unit price 1 ~ 19 pieces 1 increments ~ 21 ~ 41 ~ 61 ~ 1 ~ 1 ~ 1 1 ~ ~ - A - AX - 1

16 OW REPUSIO URETHAES WITH COUTERBORE AZ(Stanar type) ±.2 1±.2 V 2±.2 Prouct guie P.27 Shore A7 = % = % = % 1 2 M Base unit price 1 ~ 19 V Type - pieces AZ M6 3. {31}.2 {4} 7. {66} AZ M 3 3 {37} {64} {91} AZ M 3 3 {7} {1} {1} AZ M12 4. {114} 6. {1}.{2}. 7.. {}= {}.1972 AZ - AZX(Configurable full length type) 1±.2 ±.2 ±.3 H± Prouct guie P.27 2±.2 Shore A7 Type AZX 1 increments ~ M M 6 M ~ M M12 H 1 increments H< - - M - H AZX M6 - Tap M M M6 M M M

17 OW REPUSIO URETHAE SHEETS / OW REPUSIO URETHAE IE PAS UT(Urethane sheets) T ±.4 ±. ±1 + B + A T Prouct guie P.27 Shore A7 A B T Base unit price Type T - A 1 ~ 9 pieces UT UT -2 U(Urethane ie pas) B ±.3 A ±.3 Prouct guie P.27 Shore A7 A B Base unit price Type A - 1 ~ 9 pieces U - ±1 + U - ±1 + U - 42

18 [PROUCTS ATA] URETHAE OA VS. EECTIO GRAPH Urethanes for heavy loas(shore A9) EX type A AE type A AE A AE 3 A AE 3 eflection EX EX EX 691 EX eflection eflection PA PA 74 4 A 66 1 AE A 3923 AE EX EX EX EX 294 eflection.1972 High-eflection type urethane foams PA type A AE A AE eflection PA PA A 1 A eflection PA PA 1 PA ow repulsion urethanes(shore A7) A type eflection eflection 7 A A A A A A eflection A A A A eflection eflection eflection.1972

19 [PROUCTS ATA] URETHAE URABIITY VS. PERMAET STRAI GRAPH Urethanes for heavy loas(shore A9) EX type EX Compression SPM o lubrication ateral expansion MAX ateral expansion urability MAX Height change urability iametric eformation eformation in height irection Stroke A AE type A AE A type, AE type Compression 9SPM o lubrication Height change Permanent strain Permanent strain iametric eformation eformation in height irection EX ateral Compression SPM o lubrication expansion MAX 6 urability Height change Permanent strain Height change Permanent strain iametric eformation eformation in height irection Stroke A Compression 4SPM o lubrication ateral expansion MAX urability Stroke iametric eformation eformation in height irection High-eflection type urethane foams PA type an full length changes accoring to the operation count 1 Operation count Stroke eflection= % eflection= % eflection= % eflection= % eflection eflection eflection eflection 1 Permanent strain Initial 9611{9} 139{14} 177{1} 26{22} , 313{3} 74{} 77{1} 1611{16} , 1961{} 6423{6} 912{97} 14612{149} , 69{1} 6{} 973{9} 124{14} , 1373{1} 492{} 26{9} 139{14} , 1177{1} 296{} 777{9} 1327{14} Initial loa ,,,,, eflection

20 [PROUCTS ATA] CACUATIG URETHAE OA CHARACTERISTICS If urethane is use as a pressure meium, it is extremely important to know how much eflection will be cause at a given loa. Especially in a limite space, it is necessary to esign a ie with appropriate consierations for loa an eformation. The shape coefficient an elastic moulus are necessary for etermining the loa an the amount of eflection. One characteristic of urethane springs is that, regarless of the shape, they expan on both sies when loa is applie. This oes not change its overall volume; however this bulging cause by loa application must be taken into consieration when esigning a ie.(igure 1) igure 1 Shape change an loa A.Shape coefficient The shape coefficient is efine mathematically as the surface area of one loa bearing surface ivie by the surface area of all the sies not irectly subjecte to the loa. (igure 2) bearing surface H bearing surface Area of loa bearing surface(s1) Shape coefficient(s)= Area of all other sies(s 2 ) ifferent calculation methos must be use for block shapes an pillar(cyliner)shapes. (See igure 2.) a)block shapes S= W 2H(+W) (1) b)pillar shapes S= π2 4πH = 4H (2) π: Circular constant=3.14 c)cyliner shapes S= - 4H (3) However the following conitions must be met in orer to apply these formulas. 1The loa must be applie straight(not at an angle)an in a irection parallel to the axis. 2The with, length, an iameter of the loa bearing surface must excee half of the length or thickness. B.Elastic moulus The elastic moulus(e)is efine as the force(stress)per unit area ivie by the percentage of height eformation (istortion). rom Chart 1, it can be seen that uner non-lubricate conitions, the elastic moulus changes greatly epening on the shape coefficient. Uner the two conitions liste above, the elastic moulus(e)can be etermine as shown below. Elastic moulus(e)= / S H / H (4) (:, S: bearing surface area, H: Height change, H: Initial height(free height)) C. an change amount The loa can be etermine by using ormula(4). Elastic moulus E /cm b Scale factor W eformation amount..2. a)block shapes b)pillar shapes c)cyliner shapes (Chart 1)Relationship between elastic moulus an shape coefficient(numeric values) ow repulsion urethane for heavy loa Shore A a H o lubrication Heavy-loa urethane H Heavy-loa urethane M Heavy-loa urethane S H Heavy-loa urethane H Shore A9 Heavy-loa urethane M Shore A9 High-eflection type urethane foam porous Heavy-loa urethanes Shore A ow repulsion urethane for heavy loa Shore A {}.1972 Shape coefficient S If the eformation rate is % or more, the scale factor must be consiere. Shore A9 Shore A9 Shore A ubrication /cm ()= H S E () H The amount of change in height can also be etermine in the same way. Height change( H)= H S E (6)

21 [Example 1] Suppose that the length is, the with W an the height H. At that time, how much force is require to change the urethane thickness by?(conitions: Heavy loa urethane M, no lubrication)( 1cm=) irst, consier the shape coefficient(s). rom ormula(1): Shape coefficient(s)= W 2H(+W) = 2 3 ( +) = =.74 Using Chart 1, fin the intersecting point(a)between the curve for heavy loa urethane M an S=.74. The obtaine elastic moulus(e) is approximately 4,/cm 2 {49}. rom ormula(), the loa is calculate as follows. ()= H S E = H H W E H =.[cm] [cm2 ] 4,[/cm 2 ] =,{6,11} 3cm Therefore, to change the urethane height by, a force of,{6,11}is necessary. bearing surface {611} H H W [Example 2] When a force of,{1,}is applie to a urethane pillar with iameter of an height H of, how much oes the urethane height change? (Conitions: Heavy-loa urethane M, no lubrication)( 1cm=) irst, etermine the shape coefficient(s)by using ormula(2), Shape coefficient(s)= 4H = 4 =.1 Using Chart 1, fin the intersecting point(b)between the curve for heavy loa urethane M an S=.1. The obtaine elastic moulus(e) is approximately 2,/cm 2 {214}. rom ormula(6), the height change( H)is calculate as follows. Height change( H)= H S E = H π 2) 2 E =4 H πe 2 = 4,[] [cm] ,[/cm 2 ] 2 [cm 2 ] π ( =2.4cm E 2 )2 Therefore, when a loa of,{}is applie, the urethane height change is 24. bearing surface H H 24 H ote: The calculate numerical values shoul be use only for reference. 46