01
4→1
Operations Eliminated
Zero
Weld Joint Failures
↑40%
Mechanical Strength
Mining & Construction
No-Bake Sand Casting
CNC Machining
Process Conversion
From Welded Assemblies to Integrated Casting — Mining Equipment
A global mining equipment OEM was producing their machinery balancer from welded steel sub-assemblies. Four operations. Multiple weld joints. Inconsistent dimensions. Amsol redesigned it as a single integrated casting. The weld joints disappeared. The cycle time dropped. The strength increased. The OEM never went back.
Key Outcome
A component that required 4 fabrication operations and produced recurring weld failures — redesigned as a single integrated casting with zero weld joints and 40% superior mechanical strength.
The Situation
Four Operations. Multiple Weld Joints. Recurring Failures.
A global OEM manufacturing mining machinery was producing a critical Balancer component using welded steel construction. While functional, this approach created compounding problems at every level of their manufacturing operation — from the shop floor to the field.
The welded assembly required cutting, welding, grinding, and multi-stage inspection on every part. Manual welding introduced dimensional variation. Weld joints created stress concentration points under the dynamic loads of mining environments. Every failed weld in the field meant a machine out of service, a maintenance call, and warranty exposure.
The Problem — What the OEM Was Living With
Four steps to make one component — and every step adding cost and risk.
The welded construction was not just expensive — it was structurally inferior. Every weld joint was a potential failure point under the dynamic impact loads of mining equipment.
Cutting, welding, grinding, inspection — 4 separate operations per part
Manual welding producing dimensional variation batch to batch
Weld joints creating stress concentration under dynamic mining loads
Field failures requiring machine shutdowns and warranty replacements
Quality inspection required at each step — cost and lead time overhead
Amsol's Assessment — The Engineering Diagnosis
The problem is not manufacturing quality. The problem is the process itself.
Welded construction on a mining machinery component exposed to cyclic dynamic loads was the root cause — not poor welding. The right answer was to eliminate the welds, not improve them.
DFM review confirmed the geometry was castable as a single integrated part
No-bake sand casting would produce a monolithic component with continuous grain structure
Casting process eliminates all weld joints — no stress concentration points
Single operation replaces four — faster, cheaper, more consistent
Continuous grain structure in casting superior to welded joint under dynamic load
The Solution
What Amsol Did — Seven Steps from Drawing to Better Component
Amsol did not simply make the same component by a different method. The component was redesigned from the ground up for castability — and the results exceeded the welded version on every performance metric.
Steps 01–02
Design Feasibility Study & Pattern Development
Engineering Phase
Redesigned for Castability — Not Just Cast as-Is
Amsol's engineers analysed the welded geometry and redesigned it as a castable one-piece component. Features that existed only because of the welded construction — flanges, attachment points, wall transitions — were rationalised. The result was a simpler, stronger geometry that poured cleanly in a single operation.
Draft angles, parting line, and gating system designed before any tooling commitment
Wall thickness optimised for structural strength and casting yield
Alloy steel grade selected for the load and wear environment of the mining application
Pattern built in resin for volume production — dimensional stability confirmed
Steps 03–05
No-Bake Sand Casting & Controlled Solidification
Manufacturing Phase
Poured Once. Solid Throughout. No Joints.
No-bake furan resin moulding was selected over green sand for its dimensional rigidity — essential for a large, structurally critical mining component. The rigid mould resists metal pressure better, producing more accurate dimensions and better surface finish than conventional green sand on a part of this size.
Furan resin mould — rigid, dimensionally stable, better than green sand on large geometry
Gating and risering system designed to control solidification and eliminate shrinkage
Alloy steel poured at controlled temperature — solidification monitored
Shot-blasted after knockout — all sand removed, surface prepared for inspection
Steps 06–07
CNC Machining, Testing & Customer Approval
Quality & Approval Phase
Measured Against the Drawing. Not Assumed.
All critical machined interfaces and mounting faces were produced in-house on Amsol's CNC machining centre. CMM inspection verified every critical dimension before the customer received the first prototype. Load testing under conditions representative of actual mining application was completed before serial production approval was granted.
CNC machining — all critical interfaces, bores, and faces to drawing tolerance
CMM dimensional report — all balloon dimensions measured and recorded
Mechanical load testing under representative mining application conditions
First article approved — serial production programme established
The Results
What Changed — Before and After in Numbers
The OEM did not just get a cheaper component. They got a fundamentally better one — stronger, more consistent, and manufactured in a fraction of the time.
4→1
Operations Eliminated
Single casting operation replaced cutting, welding, grinding, and inspection — the entire fabrication workflow
Zero
Weld Joint Failures
No weld joints means no stress concentration points — the primary failure mode in the original component was eliminated by design
↑40%
Mechanical Strength
Continuous grain structure in the casting outperforms multi-weld fabrication under dynamic cyclic load conditions of mining equipment
Faster
Production Cycle
Single casting cycle replaces four-step fabrication workflow — significantly higher throughput per shift, lower total production cost
"
The OEM did not come to Amsol asking for casting. They came asking us to make their welded component better. The right answer was to eliminate the welds entirely — not improve them. That is what engineering-led manufacturing looks like.
Amsol Engineering Team · Process Conversion Review
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