SandSun VA08 Скачать руководство пользователя страница 4

OVERLOAD

 

  PROTECTOR

 

 

4. 

Basis of Selection

: 

4.1 Specification & parameter of press 

F:capacity of press (tons) 

S:stroke length of slide (mm) 

N:strokes per minute (spm) 

H:rated tonnage point (mm) 

D:diameter of cylinder inside slide (cm) 

n:number of cylinder inside slide (pc) 

h:stroke length of cylinder inside slide (cm) 

P

a: 

air pressure (kgf/cm

2

m : times of air pressure

 

4.2 Calculation formulas for model selection 

˙Total area of cylinder inside slide    A=(πD

2

 

/

 4)

 

x

 

n (cm

2

˙Setting hydraulic pressure of overload protector    P = Fx 1000

 

x

 

1.1 / A (kgf/cm

2

˙Setting air pressure of overload protector    Pa=P 

/

 m (kgf/cm

2

˙Drop speed of slide    V=N

   

SH-H

2

 

/ 87.5 (cm/sec) 

˙Releasing flow rate of cylinder inside slide when overload occurs Q=A

 

x

 

V (cm

3

/sec) 

˙Volume of oil tank    L  ≧  4

 

x

 

A

 

x

 

h (cm

3

 

4.3 Determination of model no. 

˙  Please choose a suitable model from below table according to releasing flow rate of cylinder 

inside slide (Q)   

˙  Releasing flow rate of overload protector which you choose has to be more than of cylinder 

inside slide when overload occurs. (Please consider use two sets of overload protector if 

releasing flow rate is not enough. It

s equal to 2 times of releasing flow rate) 

 

5. 

Attention Points for Piping: 

5.1 Air piping: 

a. Inside diameter of air piping has to be more than 6 mm. 

b. Air supply has to remove steam and keep dry, in order to avoid generate furring. 

  The function of pump and other parts will be affected or damaged by furring. 

c. Please choose normal close type (NC) of air solenoid valve either 2-way or 3-way 

  to use. 

5.2 Hydraulic piping: 

a. 1 In order to prevent normal function of overload protector or damage to inside parts 

  from dust or chips, Hydraulic piping & fitting has to be cleared completely and keep clean. 

b. Size of piping for reference: 

 

 

     

 

SANDSUN

 

         

 

                                                     

2

 

Size (I.D. 

/

 O.D.) 

12 / 18 mm

 

13 / 18 mm

 

14 / 18 mm

 

Work pressure (max.) 

400 kgf/cm

2

 

320 kgf/cm

2

 

250 kgf/cm

2

 

 

S

H h

OVERLOAD 

Содержание VA08

Страница 1: ...L VA08 Air Pressure Type SANDSUN PRECISION MACHINERY CO LTD T e l 8 8 6 4 8 5 3 6 6 8 8 F a x 8 8 6 4 8 5 3 6 6 9 9 http www sandsun com tw E mail sandsun ms26 hinet net 57 7 NO 7 LANE 57 SEC 3 CHUNG...

Страница 2: ...1 4 BASIS OF SELECTION 2 5 ATTENTION POINTS FOR PIPING 2 6 CAUTION IN USE 3 7 METHOD OF AIR DRAIN 3 8 WORKING PRINCIPLE 4 9 SETTING METHOD OF LIMIT SWITCH 5 10 TROUBLESHOOTING 6 11 PUMP ASSEMBLY DIAGR...

Страница 3: ...ssive rising of hydraulic pressure caused by raised temperature when press is operating 2 Selection of Model V A 0 8 1 2 3 Suitable for press 200 tons down Setting range of overload hydraulic pressure...

Страница 4: ...according to releasing flow rate of cylinder inside slide Q Releasing flow rate of overload protector which you choose has to be more than of cylinder inside slide when overload occurs Please consider...

Страница 5: ...king 7 1 3 Wait for around 20 seconds in order to exhaust air completely 7 1 4 Turn the air drain bolt clockwise to fasten it and then pump stops working hydraulic pressure is raising 7 1 5 If the pum...

Страница 6: ...ly and the air solenoid valve which is used by overload protector will be OFF cut off the power supply 8 3 After overload protector was released or hydraulic pressure isn t enough After overload occur...

Страница 7: ...thickness gauge of 0 8 1 0 mm each between adjustable screw and head of limit switch to adjust limit switch After adjustable screw please fasten the nut and then insert the thickness gauge to re confi...

Страница 8: ...ught Check if any damage happens from the inlet base 24 and inlet valve 20 3 Without enough oil in the oil tank Refill hydraulic oil and let the air drain 4 Pilot valve 29 caught Check if any damage h...

Страница 9: ...g Filter Exchange valve Check ring Silencer plate Buffer pad SANDSUN 1 1 1 1 1 1 1 1 Spring 39 41 42 40 Bolt Cover Silencer 37 38 35 36 M6x90 61 2800 61 2400 61 2500 R 45 61 2600 61 2700 61 5700 Inlet...

Страница 10: ...0 AS 46 AS 24 61 1400 TM14x30 AT11 1 I NO Specification M5x12 M6 M4x25 M4x4 1 2 1 1 1 1 1 1 1 Qt y 1 2 1 61 0510 61 0401 61 0305 61 0309 61 0307 BP 12 5 61 0200 TP 12 5 61 1501 61 0100 Specification B...

Страница 11: ...ing P 16 19 O Ring P 16 Cylinder Port 27 3 11 52 O Ring P 24 60 70 Limit Switch 82 277 PT1 2 Overload Cylinder Port 74 Air Drain Bolt 13 70 33 PT1 4 Air Supply Port D C A B D C E 16 d 2005 07 08 SANDS...

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