WLS Definitions Training. Machine terminology, bucket sizing and selection презентация

Objective:
to understand machine terminology
to understand how to match bucket and density to a required payload, then relate this to a machine
Machine terminology, bucket sizing and selection

Bucket Capacities - Heaped vs. Struck
Heaped Capacity - The volume of material held in a bucket with a 2 to 1 heap of material.
Struck Capacity - The volume of material held in a bucket when a straight edge is slid across the top and bottom edge of a bucket, no material outside dimension of bucket.
Machine terminology, bucket sizing and selection

Heaped
Struck
Machine terminology, bucket sizing and selection

Tipping Loads - Straight vs. Full Turn
Straight tipping load - The weight of material loaded into the specified bucket which will raise the rear tires off of the ground when the machine is not articulated.
Full Turn tipping load - The weight of material loaded into the specified bucket which will raise any tire from the ground when the machine is fully articulated. - This amount is always lower as the counterweight moves nearer the pivot point. It is this reason which makes articulated loaders harder to drive than they at first appear.
Machine terminology, bucket sizing and selection

Straight tipping load
Machine terminology, bucket sizing and selection

Full Turn tipping load
Machine terminology, bucket sizing and selection

Tipping Loads - Straight vs. Full Turn
(WM x DM) should always be greater than (WA x DA)
COG (M)
DM
COG (A)
DA
WM
WA
Machine terminology, bucket sizing and selection

Rated Operating Load (Payload) - Bucket vs. Forks
Rated Operating Load is the weight of material that can be handled safely when the machine is working
Bucket Operating Load is 50% of the machines full turn tipping load with specified bucket
Fork Operating Load is 60% of the machine full turn tipping load with specified fork attachment. (This can be raised to 80% if the machine is used solely on flat level surfaces)
Machine terminology, bucket sizing and selection

Dump Clearance vs. Hinge-pin height
Dump Clearance is the height which the bucket can clear over when the bucket is fully dumped (R)
Hinge-pin height is the height of the hinged joint for bucket dumping and is wrongly used to provide a load-over height
Loadover height is dimension “Q”
Pin height
Machine terminology, bucket sizing and selection

Basic Requirements
Primarily we are interested in throughput, tonnage, m³ etc, whatever the application
Variables to consider:
Site conditions
Material to be handled
Loadover height & reach
Required production rates and throughput
Truck/trailer loading rates and availability
Machine terminology, bucket sizing and selection

For the below listed models, calculate your recommended bucket sizes with the material types given:
Model Material Loose Density Bucket Volume
416S Wheat 730 kg/m3 ?
426 HT Sugar Beet 530 kg/m3 ?
436 HT Fertiliser 1,030 kg/m3 ?
434S Barley 600 kg/m3 ?
Full Turn Tipping Load x 50% Safety Factor = Payload
Payload / Material Density = Size
Please Note: Consider the weight difference between the standard bucket capacity and your recommended size
Machine terminology, bucket sizing and selection

For the below listed models, calculate your recommended bucket sizes with the material types given:
Model Material Loose Density Bucket Volume
416S Wheat 730 kg/m3 3.3 m3
426 HT Sugar Beet 530 kg/m3 5.9 m3
436 HT Fertiliser 1,030 kg/m3 4.2 m3
434S Barley 600 kg/m3 5.4 m3
Please Note: The above bucket capacities are dependent on the shovel weight
Machine terminology, bucket sizing and selection