Hydraulic presses type CKW for hammer forging are robust two-column structures equipped with one press cylinder (for type 63 and above with three press cylinders) and two return cylinders. The press and the return cylinders are of a ram type while hydraulic cylinders performing the movement of forging table feed, transversal feed and of swage storage are of differential type. All U-ring packings are separated to facilitate replacement. 

As supporting element of the press there is an intermediate beam which is mounted to its foundations by means of pre-stressed bolts and at the same time it serves for a holder or flat column guides.Forged columns are arranged by means of pre-stressed tensile anchors among upper and lower beams.

Return cylinders are situated under the forging shop floor on the sides of the press.

The press cylinder is fixed in the intermediate beam.

The upper swage is clamped in the upper head by means of a hydraulic clamping device and a centre rod. For safety reasons the clamped swage is held by Belleville springs. For special forging process the upper swage can be turned by 90°.

It is possible to complement the clamping system with four spring collet clamps. These clamps enable the clamping of the upper part of a die having its weight several times higher than is the weight of the upper swage.
The lower swage can slide on the forging table between two guiding plates and makes it possible to shift the swage across the transversal feed to the swage storage easily.
Forging plate is shifted by a hydraulic cylinder and its position is monitored with digital indication. For the forging of rings on a mandrel the plate is modified to clamp up two stands for bedding the forging mandrel.

Parallel with the forging desk feed there is placed the swage storage, usually designed for three or four lower swages. This storage is interconnected with the forging plate feed by the cross swage feed. Combination of the swage storage with the cross feed enables to reduce the time required for exchange of the lower swage to minimum.

The press is provided with a mechanical indicator of the press stroke for visual check or for manual press control.
These presses are driven directly by high-pressure pumps. Working medium is hydraulic oil. The press drive is usually equipped with components of REXROTH ensuring high reliability of the equipment. As a standard component of the press drive we supply a collection tank. In case of oil refill or equipment failure the tank is large enough to contain all oil of the hydraulic system.

The press drive is fitted with a standby pneumatic control system that in case of electric power failure enables to release the forged piece from the press and to transport it out of the press area.

Technical parameters CKW

TYPE OF PRESS

CKW 8

CKW 12

CKW 16

CKW 25

CKW 30

CKW 40

CKW 63

CKW 70

Pressing force [MN]

8

12

16

25

30

40

63

70

Working pressure [MPa]

32

32

32

32

32

32

35

35

Upsetting force [MN]

-

-

-

-

38

50

73

80

Working liquid pressure [MPa]

-

-

-

-

40

40

40

40

Return cylinders force [MN]

1,7

2,5

3,5

5,15

6,5

8,9

13,7

13,7

Working stroke [mm]

800

1000

1400

1700

2000

2500

2500

2800

Press height clearance [mm]

1900

2300

2900

3500

4200

5100

6100

6400

Passage between columns [mm]

1300 / 700

1700 / 900

1800 / 1000

1900 / 1000

2100 / 1140

3000 / 1400

4200 / 2000

4200 / 2000

Max. excentricity [mm]

150

200

250

300

350

400

500

500

No. of press cylinders

1

1

1

1

1

3

3

3

Forging table stroke [mm]

1200

1600

2000

2500

3000

3400

6000

6000

Pressing speed [mm/s]

150

150

120

110

100

70

63

63

Passing speed [mm/s]

300

300

300

280

280

280

250

250

Speed of fast forging [1/min]

90

90

90

80

80

80

60-85

60-85

Speed of table feed [mm/s]

30/300

30/300

30/300

30/250

30/250

30/250

30/300

30/300

Speed of cross feed [mm/s]

30/300

30/300

30/300

30/250

30/250

30/250

30/300

30/300

Speed of swage storage [mm/s]

30/250

30/250

30/250

30/230

30/230

30/250

30/300

30/300

Height of press above floor level [mm]

3800

4900

5800

6600

7500

8700

10440

13500

Height of press below floor level [mm]

4200

5000

7000

7400

8300

10100

12750

15750

Weight : Press [t]

90

150

215

325

570

640

1350

1435,8

  Table feed [t]

12

18

30

32

52

107,5

170

173,5

  Cross feed [t]

10

12,8

14

15

18

23

45

47

        Swage storage [t]

6

8

13

16,5

30

45

73

80

Total weight [t] (without covers around the press)

118

188,8

272

388,5

670

815,5

1638

1736

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