SEMA HDC 70/2-2R-4S-1500-NC-A Horizontal Double CNC Machining Centre

Sourced from an automotive manufacturer due to production changes

• Serial Number: 109303
• Control: Siemens Sinumerik 840 DSL (composed of 15 NC and 4 spindles) 
•  Machine-specific plain text messages on screen in German language
• This  machine centre is composed as follows: 

2 Centric clamping divices

• Actuation:  Hydraulic
• Swivel table: 180º
• Hydraulic pressure:  approx max 100 bar

Station 1 (front) 

Spindle units:

• 2 SEMA spindle units type SE55 - HSK 50 for deburring

Spindle

• Bearing inside diameter: 55 mm
• Sealing with barrier air and labyrinth
• Tool holder: HSK50
• Drive power: 1,5 kW at 3000 rpm
• Tool cooling Dry machining
• Drive direct via coupling
• Manual tool change
• 2 pcs. 4 spindle head for thread forming 4xM10 with IK and ABS tool holder
• Drive power AC servo motor, 11.0 kW
• Spindle speed  variable: max 3500 rpm
• Coolant internal feed with rotary distributor

Axis units AE35

• 2  SEMA NC-axis feed slide  3AE-35 
• one multi-spindle head and one deburring spindle unit each
• - X-axis - 110 mm 
• - Y-axis - 140 mm
• - Z-axis - 420 mm 
• Drive: 8 Nm, 3000 rpm
• Drive type AC-servomotor, siemens
• Traversing speed: 0-30 m/min variable
• Ball screw:  32x10 mm
• Roller guide:  size 35 
• Guide cover 
• Central lubrication connection
• X and Y-axis measurement via absolute encoder in servomotor
• Z-axes via glass rod on slide

Station 2 (Back) 

Spindle units:

2 pcs SEMA Tool turret ATC 12   plug-in spindles

• Drive power: AC-servomotor 12kw
• Spindle speed: variable, max 3500 rpm
• Coolant: internal feed with rotary distributor
• 4 pcs plug-in spindles for milling
• Sealing: lip seal ring
• Tool holder: HSK80C
• 4 pcs. plug-in spindles for drilling
• Additive seal: Lip seal ring
• Tool holder: HSK 63C
• 2 pcs. 4-spindle head for drilling 4x Ø 9,3 mm with IK and ABS tool holder
• 2 pcs. 3-spindle head for drilling 2x Ø 12,2 mm and 1x11 mm with ID and ABS tool holder

Axis units AE35

2 pcs. SEMA NC three-axis feed slide 3AE 45 for holding the ATC12 tool turrets

• X-axis - 200 mm 
• Y-axis - 200 mm 
• Z-axis - 400 mm 
• Drive X+Y: 8 Nm, 3000 rpm
• Drive -Z: 13 Nm, 3000 rpm
• Drive type: AC servomotor Siemens
• Traversing speed: 0-30 m/min variable
• Ball screw: 40 x 10 mm
• Roller guide, size 45

Cooling System: 

• Cooling system LA PROTEC
• 1 low-pressure pump 250 l/min, 5 bar
• 1 high-pressure pump 60 l/min, 30 bar
• 1 circulation filter pump
• 1 coolant tank 700 l with level switch
• 1 set of coolant valves and piping with machine

Chip Conveyor: 

• Type: hinged belt conveyor 
• Approx working width: 450 mm
• Discharge height above floor: approx. 1200 mm
• Conveyor channel height: approx 220 mm

Hydraulic  unit

• consisting of oil tank and level monitoring, filter and pump with pressure monitoring.
• Pressure range 150 bar

Machine was retrofited in 2020 by SEMA and is now disassembled and ready to load as can be seen in photos 46 - 47.