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Grey/SG Iron Casting fettling

Grey and SG Iron casting fettling is a mandatory operation prior to machining. This process is very labour intensive and hazardous. The dust generated during grinding and the risk of injury during long hours of fettling poses a serious health hazard. If in house fettling capacity is insufficient, components have to be sent out to third party suppliers for fettling. This non value added transport and loading/unloading process increases the cost per component. The inventory cost also adds up.

High payload foundry specification robots can be utilized to effectively fettle castings. The robots can run 24/7 and provide consistent results.

For smaller components, the robots can grip the components and present them to pedestal mounted grinding wheels. These special wheels are diamond coated for long life. The grinding unit is mounted on a pneumatic compensation unit. This is provided so that the robot does not get overloaded in case the runner/in gate material is excessive. For tight profiles and parting line flash removal smaller, milling cutters with indexable inserts can be used for material removal.

We have bulk in feed systems such as slat chain conveyors where an hour’s supply of components can be loaded. Vision systems can be utilized to locate the component and identify the location of the runner/in gate material to be removed. This eliminates the need for an operator to be present near the cell for loading/unloading. One operator can man multiple cells. This type of in feed system is suitable for smaller diameter circular components. Typical fettling times for these components are less than a minute.

For other complex shapes, simple laser cut fixtures mounted on indexing or rotary tables can be used for component in feed. These require frequent loading and the presence of a full time operator.

For heavier components, the components can be fed to the robots using a turntable or slide table. The component is fixtured in place. A robot mounted high speed HSK spindle can be utilized along with an array of tools mounted on a tool changer or rotary indexer. Typical cycle times are more than 3 minutes for these components due to the complexity and multiple tool changes required.

All our systems come standard with safety fencing and interlocking gates. Optional dust collection systems and sheet metal enclosures can be provided to reduce noise and dust.

BENEFITS OF ROBOTIC FETTLING

  • Increased workplace safety for operators as exposure to dust and noise is eliminated
  • Vision based identification of runners, risers and gates possible
  • Enclosures can be provided to safeguard from dust and noise
  • Heavy components such as brake drums and pump components can be handled by high payload robots
  • Foundry specification robots can be used to increase lifespan
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SUCCESFUL PROJECTS
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YEARS OF EXPERIENCE

Industries Served

  • Foundry & Metal Casting

    Automating the fettling process to remove excess material, burrs, and flash from castings, ensuring smooth and precise final products

  • Automotive

    Streamlining the fettling of automotive cast components, such as engine blocks, ensuring high-quality, finished parts for vehicle production

  • Aerospace

    Enhancing the fettling of critical aerospace components to meet stringent industry standards, ensuring smooth surfaces and dimensional accuracy

  • Heavy Machinery & Industrial Equipment

    Automating the fettling of large cast parts used in heavy machinery, improving efficiency and reducing manual labor

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FREQUENTLY ASKED QUESTIONS

Grey SG iron casting fettling automation uses a robot-based system to remove runners, risers, gates, and excess material from castings. It replaces or reduces manual grinding and trimming while improving consistency and operator safety.
Robotic fettling reduces manual handling, grinding dust exposure, repetitive strain, and injury risk in a labor-intensive process. It also helps foundries reduce outsourcing, transport, and rework costs caused by insufficient in-house fettling capacity.
Grey iron and SG iron castings are the main focus of this page, especially parts that need runner and riser removal before machining. Suitability depends on casting size, geometry, material removal volume, and fixture repeatability.
Yes, when the cell is engineered with proper guarding, interlocks, and safety controls, robotic fettling can significantly reduce operator exposure to grinding dust and hazardous manual work. Safety engineering is a core part of Synapse Robotics’ robotic systems.
Robotic fettling systems are designed for high repeatability and can operate for long production windows, including 24/7 use in suitable applications. Actual runtime depends on robot duty cycle, maintenance intervals, part presentation, and grinding-tool wear.
Yes, robotic systems apply more consistent motion, pressure, and part handling than manual fettling, which helps improve repeatability. Consistency is especially valuable when the same casting family is produced in volume.
A typical cell may include a high-payload foundry robot, pedestal-mounted grinding wheels, pneumatic compensation, fixtures, and a bulk infeed system such as a slat chain conveyor. The exact setup depends on component size, material removal needs, and line layout.
Automation reduces the need for long hours of manual grinding, which is physically demanding and difficult to staff consistently. In practice, this can lower reliance on scarce skilled fettling labor and improve production stability.
The page indicates the use of high-payload foundry-spec robots, which are intended for demanding casting applications. Whether a specific part can be handled depends on the robot payload, reach, fixture design, and the casting’s center of gravity.
The main benefits are higher safety, lower dust exposure, better consistency, reduced outsourcing, and improved production efficiency. Foundries may also gain better cost control by keeping the fettling process in-house.
It is most attractive in repetitive production, but the real deciding factor is often part consistency and the labor burden of manual fettling. If the same casting family repeats often enough, automation can still be justified.
A suitability review should consider casting geometry, gate and runner locations, weight, material removal amount, cycle time, and fixture repeatability. A practical assessment from an automation engineer is usually needed before selecting the final cell design.