which improves a dangerous work by overhead crane

180°Rotator for upper die
For press machinewww.pascaleng.co.jp

PAT.P.

SMP

180°Rotator for upper die

3 Functions

Safe separation, rotation and docking

Dieseparation

Die can be separated securely
by the magnet clamp.

Dierotation

Upper die can be rotated easily.

Diedocking

Uppper and lower diescan be engaged smoothly.

model

2SMP

SMP

Dangerous crane operation!

The dies can not assembled smoothly by using overhead crane.

① In case the upper die is lifted by overhead crane and separated from the lower die, thecrane hook can not be aligned precisely with center of the die.
② Due to the structure of crane hook and die hook, wire rope will not be equal and the upper
die can not be lifted horizontally.
③ When the gravity of upper die is not at the center, the die inclines largely.
As the upper die is lifted under this state, the guide post is bitten and the die can not bepulled out smoothly from the guide.
An skilled operator needs to take the die apart by hammering or delicate operation ofoverhead crane.

② The length of wire rope is not equal.

① The crane hook can not be positioned exactly
at the center of the die.

Upp er die

Lower die

It is quite dangeours for an operator to wind thewire rope by overhead crane to lift both of upperand lower die being still engaged.
Upp er die

Lowerd ie

3SMP

Dangerous crane operation!

The rotation of upper die(for press machine) is very dangerous.

When turning over the die, reversing work from the horizontal direction to vertical direction by dual
overhead crane will damage a wire rope by being scraped at corner of the die and will cut oﬀ the wirerope. As wire ropes are inspected visually by operators, damage is overlooked and mold fall accidents
or fatal accidents occur due to cutoﬀ /bounce of wire ropes.

The wire rope is rubbing at the cornerof the die and it may lead to the cut oﬀ.

Most of crane manufacturers prohibit users from rotating the die since the overhead crane opeation itself isdangerous. Just in case an fatal accident happens due to the reversing work of die against the manufacturers
warning, the employer will be responsible for any loss and damage.
Industrial Safety and Health Act requires the employer to take necessary measures for preventing potential dangers
due to machines, instruments and other equipments, to ensure the safety of employees. In addition, Labor Contract
Act also requires the employer to pay due regard to the employee in order to ensure safety of his body and life.
In view of the growing interest in corporate responsibility to management of industrial accident lately, increasing
number of companies are introducing a safer rotating equipment. Under such circumstances, the employer needs torealize that he may be subject to sever penalities just in case an accident occurs during die rotating work.

4

SMP

1

Dangerous crane operation!

① Lift up the upper die by a pair hoist.
( The pair hoist is originally designed for lifting a lightweight load quickly.)

Wire ropes are scraped at corner of the dieand cut oﬀ.

AArrow A

a wire rope goes
2 ② Whenover the corner of die,③ One side of wire ropes is removed
3and die is turned over 180°.

it is scraped strongly.

4④ The wire rope goesover the corner of die again
and it is scraped twice.

Especially
dangerous

Especially
dangerous(ﬁrst)(second)

②

①5

SMP

Dangerous crane operation!

The dies can not assembled smoothly by using overhead crane.

① In case the upper die is lifted and mounted on the lower die by overhead crane, the upper
die can not be aligned precisely with center of the lower die.
②Due to the structure of crane hook and die hook, wire rope length will not be equal and theupper die can not be laid down horizontally.
③ When the gravity center of upper die is displaced, the die inclines largely.
As the upper die is mounted on the lower die under this state, the guide post is scraped
and the upper die can not be ﬁtted in the lower die smoothly. A skilled worker needs tomount the die by hammering or delicate operation of overhead crane.

② The length of wire rope is not equal.

Upp er die① The upper die can not be aligned precisely
with center of the lower die.

Lower die

6

7

SMP

180°Rotator for upper die

180°Rotator for upper die has been developed according to strong needs of customers.

● The die can be rotated 180°securely compared to overhead crane.
● It is compact sized, economical and easy to introduce compared with a die spotting machine with turnover function.
● The magnet clamp being installed on the rotator as standard enalles the die easily and quickly by one touch operation without
standardizing the die size or adapter plate.

World's first Rotary type180°
Rotator for upper die

model

Mag n e t c l am p

SMP

＊When the upper die is rotated,the magnet clamp faces downward.

To p p l at eU pper d ie
L o wer d ie

L if t ing c h an g e r

Note : This photo shows a prototype.
The protection covers are removed to take photos.

8

SMP

180°Rotator for upper die

The 180 °rotation of upper die is completed in 40 sec .

Magnet clamp

Upper die

The top plate is rotated by rigid roller gear and large sized sprocket .

Top plateRoller gear

Large sized sprocket
Motor

180°Rotator for upper die
ModelOuter dimension of top plate

Die width

Die length

Upper die weight

SMP10

ø12001000 mm

1600 mm2000 mm

2 ton

SMP16

ø18001600 mm

2000 mm2500 mm

3 ton

SMP20

ø2200

2000 mm4000 mm

6 ton● The max. die weight varies depending on motor capacity. Contact Pascal for the details.

9SMP

Functions of 180°Rotator for upper die ① Die separation① Set up the die

Magnet clamp
DieTop plate

Air ﬂoating pad（PAT.P)

Lifting changer②Move the die forward. Confirm if the die perfectly contacts with the magnet clamp.

Magnet clamp
Die

Air ﬂoating pad
Lifting changer③ Turn ON the magnet clamp.

（PAT.P)

Move down the lower die.

Magnet clamp
Upper dieLower die

Air ﬂoating pad（PAT.P)
Lifting changer

10

SMP

Functions of 180°Rotator for upper die ② Die rotation④ Move the lifting changer backward.

Magnet clamp

Air ﬂoating pad（PAT.P)

Lifting changer⑤Turn the top plate 180°and stop at a horizontal position.

Upper dieMagnet clamp

Air ﬂoating pad（PAT.P)

Lifting changer⑥Turn OFF the magnet clamp. Unload the upper die.
Upper dieMagnet clamp

Air ﬂoating pad（PAT.P)

Lifting changer

11

SMP

Functions of 180°Rotator for upper die ③ Engaging upper and lower die⑦ Turn ON the magnet clamp. Turn the upper die 180°.
Magnet clamp

Air ﬂoating pad（PAT.P)

Lifting changer⑧ Move the lower die forward. Position by floating pad.
Upper dieMagnet clamp

Air ﬂoating pad（PAT.P)
Lifting changer⑨ Move up the lower die.
Make the lower die perfectly contact with upper die and Turn OFF the magnet clamp.
Magnet clamp
Die

Air ﬂoating pad
Lifting changer

12（PAT.P)SMP

Air floating pad (For lower die positioning)

A floating pad being actuated by air is provided to position the heavey die by hand

Air ﬂoating pad（PAT.P)

Lifting changer

Die 2tonAir

Float0.5MPa
Air

1450

950

1000

4 x M16 Screw depth 321330

135

Floating padAir

700300Mass

300

8 x Rc1/2 Screw

300

2550

Grip

510 g13

SMP

180°Rotator for upper die

Voids on the die

In case there are voids on the die,the magnet clamp cores are mounted obliquely to gain the clamping force more. (PAT.P)

Plate size
Die size

2500 mm×1600mm

1800 mm×1440mm

Mass2 ton

Eﬀective clamping force 509 kN (25.4 times of die weight)

Clamp part
2500 mm1600 mm

Die

1800 mm

1440mmVoid

Upper die face

14

SMP

180°Rotator for upper die

No voids on the die

In case there are no voids on the upper die face,
the magnet clamp cores are mounted at the standard position.

Plate size
Die size

2500 mm×1000mm

1970 mm×700mm

Mass

1.5 tonEﬀective clamping force 117 kN (7.8 times of die weight)

2500 mm1000 mm

Clamp partDie

700 mm1970 mm

Upper die face

15

SMP

180°Rotator for upper die

Calculate "support mounting criteria" for the die with voids.

Support mountingcriteria＝

Magnetic force
Die weight

W：Upper die weight15kN＝

F･α

If the value is less than 20,
mount the support.

20

W

F：Attraction force of magnet200kN

α：Coefficient for the material0.8（FCD）

Support mounting criteria Calculation example
Contact face

1540840

Non-contact face

Upper die face
Contact area of upper die：694501mm 2Magnet plate lower face

Upper die area：1293600mm 2 ＝ 53.7％

Magnet core layout

Contact area of magnet cores = 144241 mm 2

Area of magnet core

= 70×70 = 4900 mm2

Quantities of contacted magnet cores =force of one magnet core

4900 mm2= 29.44 cores

7070

Attraction force of magnet = 29.44×7.35 = 216 kN ≒ 200 kN= 7.35 kN

Calculation formula

F･αW＝Support mounting criteria

200×0.815

W：Upper die weight＝

160
15＝

10.67

F：Attraction force of magnet

α：Coefficient for the material0.8（FCD）

16144241 mm2Mount a support.
→ See next page

SMP

180°Rotator for upper die

Safety factor becomes infinite at every angle by mounting a support.
F：Attraction force of magnet200kN
α：Coefficient for the material0.8（FCD）

Safety factor ＝Friction force
Sliding force of upper die＝

μ：Friction coefficient0.1~0.2（Actual measured value）＊

F･α･μ

W：Upper die weight15kN

W･sinθ

θ：Rotation angle＊ Although the actual measured value is 0.2,
0.1 is applied to the calculation for safety purpose.

Rotation angle

Rough drawing
Magnetclamp

Calculation formula

Safety factor

clamping force
200kN
200×0.8−15

＝

∞

＝

1.41

＝∞

＝

1.07

＝

∞

＝

1.61

clamping force
200kN
when the support is (200×0.8＋15×0.707 )×0.1＝
installed0∞0°0Upper die weight
15kN

SupportUpper die

Frictionforce
14.9kN(200×0.8−15×0.707 )×0.1
clamping force
200kN

45°
Upper dieweight15kN

15×0.707

when the support isinstalled＝

14.910.6(200×0.8−15×0.707 )×0.1
0Sliding
force ofupper die

Friction
force
16kN

clamping force
200kN

90°

200×0.8×0.1
15×1
At installationof support

Upper dieweight
15kN

＝

1615

200×0.8×01
0Support

135°

Friction force
17.1kN

Sliding
force ofupper die

(200×0.8＋15×0.707 )×0.1
15×0.707

Upper dieweight
15kN

180°

＝

17.1
10.6

200×0.8＋15
Attraction force
200kN

0＝

∞

17

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19Itami, Hyogo, Japan 664 - 8502
TEL. +81-72-777-3333 FAX. +81-72-777-3520

Chicago, U.S.A.

TEL. +1 -847 -427 -1234

Stuttgart, Germany

TEL. +49 - 711 - 782 -850 -0

Dalian, China

TEL. +86 - 411 -8732 -2988

Shanghai, China

TEL. +86 -21 -5263 -4122

Changwon, Korea

TEL. +82 -55 -274 -0971

Bangkok, Thailand

TEL. +66 - 2173 -5855

PA-574EREV.02018.05
Speciﬁcations are subject to change without prior notice.

CERTIFICATE OF APPROVAL ISO9001