fsg 1640ad surfacer granding machin

Overview of the FSG 1640AD Surface Grinding Machine

The FSG 1640AD is a high-precision, horizontal spindle reciprocating table surface grinding machine designed for demanding workshop and toolroom applications. Its core function is to produce exceptionally flat and fine surface finishes on metallic components using a rotating abrasive wheel. The "1640" designation typically refers to a table working capacity of approximately 1600mm in length by 400mm in width, making it suitable for medium to large workpieces. This model emphasizes rigidity, thermal stability, and user-friendly controls to achieve tight tolerances in surface flatness, parallelism, and finish. It is engineered for tasks ranging from precision die and mold work to the production of machine tool components and automotive parts.

Key Features and Technological Advantages

The FSG 1640AD incorporates several design elements that distinguish it from conventional or older surface grinders. A primary focus is on minimizing thermal distortion—a major cause of accuracy loss in precision grinding. This is often achieved through features like a thermally symmetric column design, coolant temperature management systems, and strategically placed ribs in the cast iron structure for enhanced rigidity and vibration damping.

Furthermore, modern iterations like the AD series frequently include advanced control systems. These may provide automatic wheel dressing cycles, programmable downfeed increments, and digital readouts for all axes, significantly improving repeatability and reducing operator error.

To illustrate its positioning, here is a comparison with a generic older-generation surface grinder:

Feature	FSG 1640AD (Modern Design)	Conventional Older Surface Grinder
Structural Design	Optimized ribbed casting for thermal stability & damping.	Standard box-type casting with less thermal management.
Control System	CNC or advanced digital control with automatic cycles.	Manual handwheels with limited or no digital readout.
Accuracy Consistency	High, maintained over long operating periods due to thermal control.	Can degrade as machine temperature rises during operation.
Operator Efficiency	Higher due to automation (auto-dress, programmable feeds).	Lower, heavily reliant on operator skill for all steps.
Typical Application	High-precision batch production & complex tooling.	General-purpose workshop grinding, tool sharpening.

Real-World Application Case: Precision Tooling Plate Production

A manufacturer specializing in injection molds and fixture plates utilized an FSG-1640 series machine to solve a recurring quality issue. They needed to produce large (1500mm x 350mm) ground steel plates with a guaranteed flatness of under 0.01mm across the entire surface for use as master calibration plates.

Previously, using an older grinder, achieving this specification was inconsistent. The plates would often exhibit a slight convexity ("belly") in the center after grinding—a classic symptom of machine thermal expansion or structural deflection under load.

By implementing the FSG 1640AD with its thermally stable bed and column design, the process was stabilized. The operator programmed a specific grinding sequence with light finishing passes. The machine's rigidity prevented deflection from the grinding forces, while its thermal symmetry ensured the spindle axis remained perpendicular to the table travel throughout the job cycle.

The result was a consistent output of plates meeting the flatness tolerance reliably. This reduced scrap rework by over 90% and established these plates as a trusted reference standard within their quality control process.

Frequently Asked Questions (FAQ)

1. What is the typical workpiece weight capacity for an FSG 1640AD?
   While capacity varies by specific manufacturer build, machines in this size class are commonly designed to handle workpiece loads (including the magnetic chuck) ranging from 800 kg to 1500 kg. It is critical to consult the machine's technical data sheet for the exact specification.

2. Can the FSG 1640AD perform creep-feed grinding?
   Not typically as a standard configuration. The FSG-AD series is primarily designed for conventional precision surface grinding with moderate depths of cut and reciprocating table motion. Creep-feed grinders require significantly higher spindle power, specialized coolant delivery systems, and different wheel technology.

3. What type of wheel spindle does it use?
   It is equipped with a high-precision cartridge-type spindle mounted in pre-loaded angular contact ball bearings or hydrodynamic bearings (depending on model year/options). This provides high rotational accuracy essential for fine surface finishes.

4. Is this machine suitable for grinding hardened steel?
   Yes, this is one of its primary applications.The abrasive grinding wheel is perfectly suited for machining hardened tool steels (e.g., D2, A2) and other hardened alloys that cannot be easily cut by other metal removal processes.

5.What level of surface finish (Ra) can be expected?
With proper wheel selection,dressing,and correct machine parameters,the FSG 1640AD is capable of producing surface finishes of Ra 0.2 micrometers (8 microinches) or better on suitable materials under optimal conditions