Kitagawa BB200 Series Скачать руководство пользователя

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f max

Set screw

Coil spring

Steel ball

Socket head cap screw

Hex key

Plunger nut

Draw nut

Chuk

Process it to match the

thread of the draw pipe

The steel ball and the coll

spring existinside the

wedge plunger only for 6°

・When other actuators are operated by the same hydraulic pressure source as the cylinder for chuck, be sure that

a pressure drop of the cylinder does not occur during use. A hydraulic pressure drop leads to a drop in the
gripping force which could allow the work to fly out.

・As to the drain hose
・Use one with inside diameter φ32.
・Use a transparent vinyl hose for visualization.
・Provide a stream slope, without air pocket. This will ensure no back pressure.
・The end of the hose is physically above the oil level. (Refer to Fig.13)
・If the hydraulic oil stagnates inside the cylinder, oil leakage occurs, which may cause a fire.

8−2 In the case that the back plate must be manufactured

・Provide sufficient strength for the draw pipe. If the draw pipe is broken due to insufficiency of the strength, the

gripping force will be lost instantly, which is dangerous as the work will fly out.

・Keep the dimension e and the dimension f in Fig. 14 for the draw pipe and a material with the tensile strength

380MPa (38kgf/mm

) or more must be used.

・The personnel who designed draw pipe must judge whether the strength of the draw pipe is sufficient for the

usage conditions.

・The dimensions and materials specified in this manual do not guarantee that the draw pipe will not break under

every usage condition.

・If the screw-in depth of the draw pipe to the draw nut is insufficient, the screw will break and the gripping force

will be lost instantly, which is dangerous as the work will fly out.

・If the engagement of the screw of the draw pipe is loose, vibration may occur resulting in breakage of the screw.

If the screw breaks, the gripping force will be lost instantly, which is dangerous as the work will fly out.

・If the draw pipe is unbalanced, vibration occurs, the screw is broken and the gripping force will be lost instantly,

which is dangerous as the work will fly out.

・Especially, when a large sized hydraulic unit is used, excessive surge pressure is generated and the gripping

force becomes large, therefore, it may result in breakage of the chuck or the lowering of endurance. Restrain the
surge pressure by adopting a throttle valve, etc.

２．Processing of draw nut

1. Remove the socket head cap screw fixing the plunger nut with a hex key, and take out the plunger nut and the
draw nut together.
2. Remove the draw nut from the plunger nut. At this point, pay attention not to lose the steel ball (rigid sphere of φ5)
and the coil spring.
3. Process the draw nut to match the screw of the draw pipe.
4. When assembling, build the draw nut in the plunger nut, turn the draw nut to check the responsiveness of the steel
ball, and then attach it with the hexagon socket head bolt. If no responsiveness is obtained, assemble it again. Also,
tighten the socket head cap screw at the specified torque (Refer to page 28).

Type

Cylinder

BB206

BB208

BB210

BB212

M60×2

M75×2

M90×2

M115×2

d (f7)

110

-0.030
-0.060
-0.030
-0.060
-0.036
-0.071
-0.036
-0.071

e Min

3.5

4.5

f Max

M60×2

M75×2

M90×2

M115×2

A+36

A+44

A+40.5

A+39

Fig.14

Table 8

・Install after removing the dust inside the pipe completely.
・Add a filter to the pressure supply line. If foreign matters gets inside the cylinder, this is dangerous since the

rotation valve of the cylinder will seize, the hose will tear off, and the cylinder will rotate. This is also dangerous
as the work will fly out.

・Always use a flexible hose for the hydraulic piping to the cylinder, and the bending force or tensile force of the

pipe must not be applied to the cylinder. Use a pipe inside diameter as large as possible and keep the piping
length as short as possible.

・Do not process the draw nut for screw of the dimensions f MAX specified in Table 8 or more. The draw nut may

break and the work could fly out.

１．Production of draw pipe

Determine the length of the draw pipe as shown below.

The dimension L in Fig.14 is determined from the distance A between the cylinder adapter and the back plate.
(Example) In the combination of BB206, SS1543K, and when A=800mm, the draw pipe length L is to be
L = A + 36 = 800 + 36 = 836mm.

At the time of the screw process of the dimension a, the precision is to be JIS 6H and 6h, 6g matching the screw of the
piston of the cylinder. Pay attention so that the thread parts on both ends and the inner periphery do not swing or
become unbalanced.

Fig.15

Cylinder adaptor

Chuk

Draw pipe

Back plate

Cylinder

ｃ

ｂ

e Min

Max

φ0.05

φ0.02