TOMECO SI manufactured main chutes and related steel components for concrete mixer trucks based on customer drawings, technical specifications, and quality requirements.
The project involved thick steel components with curved profiles, multiple formed sections, welded joints, and strict dimensional interfaces. Each assembly required coordinated cutting, bending, rolling, welding, inspection, and surface finishing to ensure proper installation within the concrete mixer system.
Project Requirements
The customer required a manufacturing partner in Vietnam capable of developing a stable production process for complex steel chutes previously sourced from other markets.
The main requirements included:
- Accurate formed profiles and bending angles;
- Controlled geometry across multiple subcomponents;
- Smooth transitions between welded sections;
- Reliable fit with the mixer barrel system;
- Consistent surface quality and corrosion protection;
- Repeatable manufacturing for future production orders;
- Quality documentation according to the agreed project requirements.
Manufacturing Challenges
Complex Forming Geometry
The chute design incorporated deep curves and several formed steel sections. Small variations in bending angles or rolling profiles could affect the geometry of the complete assembly.
Dimensional Control During Welding
Heat generated during welding could cause distortion or misalignment. Because the chute consisted of several interconnected components, deviations in one section could affect the overall symmetry and final fit.
Consistent Surface Finish
In addition to dimensional conformity, the finished products required smooth welded transitions and a uniform protective coating suitable for construction equipment.
TOMECO SI’s Manufacturing Approach
1. Material Preparation and Cutting
Steel plates were cut according to approved engineering drawings. Accurate profiles and clean cutting edges provided a controlled foundation for subsequent forming and assembly.
2. Bending and Forming
The main chute sections and related components were formed through a planned sequence of press-brake operations. Bending parameters and forming sequences were adjusted to maintain the required angles and reduce the risk of cracking or dimensional variation.
3. Rolling of Curved Components
Selected subcomponents were rolled to create the specified curved profiles. Each section was checked before assembly to ensure conformity with the required geometry.
4. Jig-Assisted Assembly and Welding
Custom assembly and welding jigs were used to locate and hold the individual parts in position. This helped control alignment, symmetry, and deformation throughout welding.
Welding sequences and heat input were managed according to the component geometry, material, and project requirements.
5. Inspection and Quality Verification
After fabrication, the main chutes were inspected for:
- Overall dimensions;
- Position and alignment of components;
- Symmetry and profile conformity;
- Weld appearance and continuity;
- Fit between adjoining sections;
- Surface condition before coating.
Inspection records and supporting quality documents were prepared according to the customer’s requirements.
6. Surface Treatment and Painting
The completed chute assemblies received surface preparation and protective coating. The final finish was checked for coverage, appearance, and conformity with the approved coating requirements.
Project Outcome
Following process development and trial production, the main chute assemblies achieved the required dimensional, fabrication, and surface-quality criteria. The project established a repeatable manufacturing process for future orders.
This case demonstrates TOMECO SI’s capabilities in:
- Complex steel forming;
- Heavy sheet-metal fabrication;
- Jig-assisted welding;
- Dimensional and geometric control;
- Protective surface finishing;
- Build-to-print manufacturing for construction equipment.
Supporting International OEM Manufacturing
TOMECO SI supports international equipment manufacturers seeking a capable production partner in Vietnam. Our integrated manufacturing scope covers prototypes, trial orders, project-based quantities, and stable repeat production.
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