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Bucket wheel excavators (BWE)
The Joint Stock Company UNEX has been manufacturing bucket wheel excavators for more than 50 years. So you can consider UNEX to be an experienced specialist in manufacturing of large-scale machinery for use in open pit-mines. The UNEX team of well-trained specialists is able and ready to react to all its customers individual requirements. More than 130 custom-built excavators and reclaimers can be found in e.g. Czech Republic, Russia and the Ukraine, in Bosnia and Herzegovina, Macedonia, Bulgaria, Poland and Slovakia.
There are two types of bucket wheel excavator: Compact and Classical. The division depends on the possibility of repeated assembly and disassembly.
1. It is not possible to assemble and disassemble the Classical BWE. The excavator moves on either a caterpillar or walking undercarriage. Their capacity ranges from 1 200 to 6 500 m3/h and the specific cutting force from 90 to 168 kN/m. According to the adjustable distance between the wheel and the axis of the machine, classical BWEs are divided into two groups: excavators with a telescopic bucket wheel boom (KU 300 and KU 800) and without a telescopic bucket wheel boom (K 2000).
2. The Compact BWE can be repeatedly assembled and disassembled. Their capacity ranges from 400 to 2 800 m3/h and the specific cutting force from 25 to 145 kN/m.
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Rated capacity 1.7mx
Rated weight 3500kg
Operating weight 9700kg
Automatic leveling ability Yes
Static tilting load 58.8KN
Max breakout force 120KN
Max drawing force 90KN
Max grade ability 30
Max.dump height 3050mm
Max.dump reach 1260mm
Min.ground clearance 410mm
Wheel base 2600mm
Tread 1870mm
Height with bucket at full raise 4870mm
Lifting time 5.5sifull load j
Total cycle time(lifting, dumping, lowering) 9.67sifull loadj
Overall dimensions (l~w~h)mm 6990~2420~3000
Engine Yuchai iChina famous enginej
Model YC6108G
Type In line, water cooled, four stroke, dir.inject
Rated power 92KW
Rated speed 2200r/min
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Opencast Mining Systems
Opencast mine
Germany
1x bucket wheel excavator SR1301/1532
refurbishing, bucket wheel head with drive unit
driving power of bucket wheel 500 kW
cutting height 26 m
excavation depth 5 m
number of buckets 14
year of construction 1986
coal 3500 m/h
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Sandvik bucket-wheel excavators are designed to strip overburden and mine coal, lignite and various soft minerals continuously. With capacities from 150-10000 m3/h (loose), they are capable of mining formations with compressive strengths of up to 20 MPa. Controlled by state-of-the art PLC systems with extensive automation possibilities, they have ergonomic, user-friendly interfaces for operator comfort, quick familiarization and sustained high productivity. Since they are of modular construction, Sandvik bucket wheel excavators are easy to optimize for different applications. All units are custom-built and made to order.
Our standard range of compact bucket wheel excavators is designed for small to medium-size opencast mines. All models are of rugged, rational construction, highly productive for their size and weight and very reliable. Models with higher capacities are of the C-frame design. Basic data for the most popular models is given in the table below.
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Productivity
CUMMINS QSB6.7 electronic engine,the emission meets EPA TIER standards
High drive speeds with 4 forward and revrese gears
Responsive and accurate hand control with a single joystick with integrated KD function
Double-brake pedals simplify simultaneous driving and mechanical operations
Economical
Torque converter is matched to the engine to ensure maximum power transfer
Hydraulics employ a dual-pump system and converging and self-unloading function to reduce energy loss
Improved air per-filter system improves overall engine efficiency in dusty conditions
Reliability
Vehicle has a strong flexible frame that will withstand load and torsion
stresses in the toughest working conditions
Key components from world class suppliers
Warranty and service programs available
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The 936H wheel loader is one of brand-new series loaders developed independently by our company through introducing the advanced experience of the loader manufacturers all over the world, for which adopted the designs of the advanced appearance and the interior decoration of saloon car, featuring the reasonable and unified arrangement. The separated torque converter-transmission system supplied by the domestically-renowned manufacturer makes the entire machine more reliable in performance，easier to repair and greatly enhances its reliability, versatility, comfort and operability. Comparing with the loaders manufactured by other companies, 936H wheel loader produced by our company has the following advantages: new and fresh appearance, shortest three-time cycle time (9.9s); maximum load and unload height (3230mm), minimum turning radius (4929mm) and farthest unload distance (1168mm)
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Bucket wheel and bucket chain excavators are important products designed for mining the overburden. The first bucket chain excavator of our own construction called D 800 was manufactured in 1952, with an output of 1 050 m3/h and moved on rails. The most effective bucket chain excavator is marked RK 5000 and it achieves an output of 5 000 m3/h of excavated overburden.
Our production range covers also the biggest digging wheel excavator of the Czech Republic, the K 10000, which has been working with an output of 10 000 m3/h of excavated overburden in Blina mine since 1978.
Bucket-chain and bucket-wheel excavators are designed according to specific requests of customers, always with respect to the actual mining conditions in which they will operate.
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Bucket Wheel Excavators (BWE) are continuous cutting machines for soft to semi hard materials like clay, sand, gravel, marl and their blendings as well as lignite and hard coal. Tenova TAKRAF Bucket Wheel Excavators excavate a wide range of capacities between 200 and 16000 m/h and at working bench heights from less than 5 m to maximal 51 m.
The Bucket Wheel Excavator is favorable connected to a belt conveyor system with or without a Mobile Transfer Conveyor intermediately installed or a cross pit spreader transferring the material to the waste dump or the raw material stockpile.
According to local mine conditions Compact and Large Bucket Wheel Excavators are offered - whereas the selection mostly is determined by required cutting height and width (working block).
The characteristic parts of a Bucket Wheel Excavator are the cutting wheel with buckets, the wheel boom, the superstructure with counterweight boom, the substructure, the undercarriage with crawler tracks and a transfer boom to the bench conveyor (or a connecting bridge to the loading unit). All main parts are designed to meet the demands of the project regarding optimization, standardization and maintenance. Therefore, Tenova TAKRAF stands with more than 100 years of Bucket Wheel Excavator-experience.
Bucket Wheel Excavators are among the largest terrestrial vehicles ever constructed - the biggest machine built, the Tenova TAKRAF SRs 8000, has a weight of 14.200 t and moves 240,000 m of overburden per day.
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The complete set of bucket wheel excavator includes the bucket wheel excavator, the A-type belt conveyer, B-type belt conveyer, 1800 Hopper, spreader. The process of material excavated by the bucket wheel: Bucketed material--pass through belt -- Conveyer -- Hopper-- Spreader-- Material stock.
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Electronic roller feed units
Dreher roller feed units stand out for high precision and constant feed exactness at a high dynamic force. Roller feed units can be delivered for a strip width until 2000 mm and a strip thickness from 0,1 to 10 mm for co-ordinated roller diameters.
Pneumatic strip feed units
The cost-effective well-tried alternative to roller feed units disposing of an integrated sequentiell phase control and guaranteeing easy installation, precision and product assurance. These units can also be used for foils, sensible strip material, stripe and wire profile material.
Number of strokes: 1200 1/min
Precision: +/- 0,025 mm
Minimum set-up times by easy adjustment
Easy strip insertion
Mechanic intermediate release device
Feeder with linear motor
High precision feeder for very large strokes and for more flexibility in the production.
Particularly suitable for:
- the feed of three dimensional parts
- Large strokes
- For sensitive and coating strips
- Flexible feed length
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DIMECO roll feeder range results from a combination of 5 mechanical models and 3 numerical control packages. They fulfil your needs for strips from 0,1mm to 10 mm thickness and up to 2000mm wide.
Cutting edge roll performances are reached thanks to an optimized inertia to reach up to 1000 rpm and 150m/mn. Rolls are hardened, chromed and sand blasted for a better grip.
The use of a comprehensive electronic package (sensors, motors, controls) provided by the same supplier selected among worldwide leading O.E.M. provides outstanding positioning accuracy and reliability (+/- 0,05mm).
You can select the HMI that most fits your needs: simple but efficient with ECODRIVE, sophisticated with SIMOSTAR370, which offers access to the entire operating and maintenance data on a 12 colour touch screen.
With PFS and ADA functions, feeding line machines speeds and accelerations are synchronized according to press rate, feeding angle and pitch. Material strains are therefore avoided, loop length may be reduced and machine lifetime is increased.
Built-in electronic cams and active safety device controls are programmed directly from the feeder terminal.
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Roll feed systems from ARKU guarantee high feed and repetition accuracy. ARKU produces them in two series for all strip cross-sections.
ARKU has developed the feed series ServoMaster PowerMaster as successful solutions based on its many years' experience with successful sheet shaping installations.
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Minster Roll Feed Standard Features
Free Standing Feed Cabinet with Shock Isolation Mounts or Compact Press-Mounted Design
Hardened and Ground Feed Rolls
Proportional Drive System with Low Inertia Belt
Dual Roll Drive with Precision Anti-Backlash Gearing
Adjustable Passline Height
High Efficiency Pneumatic Roll Lift Design
Adjustable Stock Guides
Photo Electric End of Stock Detector
Digital Servo Motor and Drive Control
Feed Operator Interface Through PMC Control
Hand Held Feed Set-Up Pendant
Integrated Coil Line PMC Control
Machine Finish
Heavy Cast Frame
High Efficiency Pneumatic Roll Lift (425 spm)
Chrome Blast Roll Finish
Cascading Roll Catenary with Stock Guides
Allen Bradley Ultra 5000 Drive
Allen Bradley MP Series Low-Inertia Brushless Servo Motors
Cutler Hammer Panel Mate Operator Interface, PMC Control
Allen Bradley Panel View 300 Operator Interface, Basic Retrofit
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Roller conveyer with stop -and measuring systems.
Working length 2,70m, on left hand side of machine.
Roller width 200 mm.
Special versions upon request.
Strong self supporting steel legs.
Sturdy carriage with the additional possibility of swinging away the stop for very short or extraordinary long pieces.
Positioning control by servo drive on sturdy carriage guarantees for an optimum in accuracy.
The positioning control units calibrate themselves.
Positioning systems with Piccolo electronic and industry PC have universal possibilities in data input, data transfer and data output.
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This system is made up of two roller conveyors. The rollers are covered with an elastic PVC sleeve. One conveyor receives the sheet while the other evacuates the finished material. The silent traction of the rollers is by means of a traction-belt.
The first conveyor has a pneumatic stop and is equipped with a lifting system which positions the sheet on its longest side. Gravity centres the sheet on its short side. The arms of the lifting system have built-in rollers which position the product to be withdrawn by a robot.
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Roll feeder for high precision in feeding and high speed strokes.
A-WVS roll feeder series
have been developed to achieve high precision in feeding and high speed strokes. This garanted by large dimension of feeding rolls, which are pivoted in bearings without clearance. Drive force is supplied from AC-Motor, which provides the drive for upper and lower feeding rolls through pre tensioned gears mechanism
All gears are hardened and surface grinded.
The upper feeding roll can be lifted with support of pneumatic or hydraulic drive. This attachment can be used for to intermediate lifting as well.
The feeding length are freely adjustable. Different stepping modes can be choosen.
The roll feeder sytem is because of high feeding power and solid design prefered to be equipped with roll straighteners. Band cleaning and lubricate units can be added as well.
Wanzke first develeoped this roll feeder system AC-motors driven.
This roll feeder are used on new presses or as optimization of normal presses in use to increase the productivity.
Further applications: Cut to length lines , sheet production for transformer
Technical data:
Thickness of material: from 0,1 up to 20 mm.
Roll feeder sizes from 50 up to 1800 mm
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