The development of the tube bender have been resolved within a corporate research and development program IMPULS, realized under financial aid from the Czech state budget through the Czech Ministry of Industry and Commerce.
Characterization
- Numeric controlled tube bender for professional batch production.
- Its design concept fully complies with the requirements of both piece- and small batch production.
- It allows accurate and high-quality three-dimensional cold bending of tubes.
- It is designed for bending both thick-walled and thin-walled pipes up to Ø 80 mm.
- It is equipped with a Siemens control system and operated by a touch panel.
- Operation options in both manual and automatic mode.
- Employing atypical segments extends the work range to include the bending of bars of various sections, flat-ovals, as well as flat (PLO) and four-cornered (4HR) bars.
Tube bending machine - Basic construction
The tube bending machine is delivered as an assembly making up the following package:
- Complete bending machine XOT 80 CNC
- Support stand with control panel
- Drive of segments Ø 40 mm
- Drive of segments Ø 80 mm
- Holder of mandrels
- The tube bender allows the bending of tubes measuring between the start of first bend to the end of tube up to 3600 mm. For still longer tubes special equipment must be ordered.
- The movement of all mechanisms is maintained by the hydraulic equipment of the tube bender through the hydraulic unit with the respective compressed-oil distributors.
- A tube bend is performed by a hydraulic cylinder, which is connected to a three-row roller chain guided over two chain wheels.
- A chain wheel drives the bending arm, which carries the hydraulic cylinder for clamping the tube to the segment.
- When performing a bend, the bending segment is driven along with the bending arm. The return of the segment is ensured by a slow-running hydraulic motor.
- A longitudinal tube feed between individual bends is carried out using a slide equipped with collet chuck, the slide being driven by a slow-running hydraulic motor over pinion and toothed rack.
Turning the tube around its longitudinal axis allows the execution of bends in various planes in space. The rotation is ensured by a slow-running hydraulic motor over worm and worm gear.
- The tube bending machine is controlled by the Siemens S7-CPU 314 control system. The operation is via the S7-CPU touch panel located on a portable support stand. The control system allows tube bending in both manual and automatic mode. The control panel communicates with the operator through pre-selected screens, so called frames. The operation via the frames is synoptic and rather intuitive.
Specification
| Diameter range of tubes to be bent [mm] |
20 ÷ 80 |
| Bending segments for tube diameters |
[mm] |
20 |
25 |
28 30 |
32 35
38 |
44 |
51 |
60 |
80 |
Atyp.
10÷80 |
| ["] |
½ |
¾ |
|
1 |
1¼ |
1½ |
2 |
|
|
| Bend radius on tube axis [mm] |
60 |
75 |
90 |
110 |
130 |
150 |
180 |
240 |
60÷250 |
|
Max. section of materials to be bent |
 |
| Max. length of clamped tube [mm] |
3 600 |
| Dimensions (length × width × height) [mm] |
4 000 × 800 × 950 |
| Mass [kg] |
1 250 |
| Input power [kW] |
5 |
| Supply voltage [V] |
400 |
| Max. spindle torque [Nm] |
22 400 |
Accessory equipment
Separate accessories:
- Bending segments TR 20 - 80
- Fixtures and slide elements
- Atypical segments
- Mandrels for thin-walled tubes
Additional equipment for bending flat and square bars
- This additional equipment is designed for bending flat and square bars on small bend radii.
- It is inserted into the tube bender spindle and fastened to the clamping cylinder and to the holder of slide elements. It allows the bending of flat bars of up to 100 x 20 mm and square bars of max. 40 mm on a radius of 10 ÷ 30 mm. The maximum bend radius at R = 10 - 14 mm is 120°, with radii of R = 15 - 30 mm it is 180°.
