What are CNC Tool and Cutter Grinder and Its Applications?

Today’s tool and cutter grinder is typically a CNC machine tool, usually 5 axes, which produces endmills, drills, step tools, etc. which are widely used in the metal cutting and woodworking industries.


Modern CNC tool and cutter grinders enhance productivity by typically offering features such as automatic tool loading as well as the ability to support multiple grinding wheels. High levels of automation, as well as automatic in-machine tool measurement and compensation, allow extended periods of unmanned production. With careful process configuration and appropriate tool support, tolerances less than 5 micrometers (0.0002″) can be consistently achieved even on the most complex parts.


Apart from manufacturing, in-machine tool measurement using touch-probe or laser technology allows cutting tools to be reconditioned. During normal use, cutting edges either wear and/or chip. The geometric features of cutting tools can be automatically measured within the CNC tool grinder and the tool ground to return cutting surfaces to optimal condition.


Significant software advancements have allowed CNC tool and cutter grinders to be utilized in a wide range of industries. Advanced CNC grinders feature sophisticated software that allows geometrically complex parts to be designed either parametrically or by using third party CAD/CAM software. 3D simulation of the entire grinding process and the finished part is possible as well as detection of any potential mechanical collisions and calculation of production time. Such features allow parts to be designed and verified, as well as the production process optimized, entirely within the software environment.


Tool and cutter grinders can be adapted to manufacturing precision machine components. The machine, when used for these purposes more likely would be called a CNC Grinding System.


CNC Grinding Systems are widely used to produce parts for aerospace, medical, automotive, and other industries. Extremely hard and exotic materials are generally no problem for today’s grinding systems and the multi-axis machines are capable of generating quite complex geometries.


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Article Source: https://en.wikipedia.org/wiki/Tool_and_cutter_grinder

What is a Grinding Machine?

A grinding machine uses an abrasive wheel as a cutting tool to shape or change the dimensions of a hard material. The types of materials that need grinding are usually metallic items such as tools and rods. These machines generally work by reducing the material through abrasion. Generally, the grain of the abrasive wheel chips away at the material, changing its shape or dimension.


Since the process of grinding metallic items often generates a great deal of heat, a coolant is often required to prevent the material and the machine from overheating. In high precision jobs, coolant may not be necessary. High precision grinding usually involves removing minute amounts of material, so very little heat is generated.


The basic parts that a user works with are typically the grinding machine’s power driven wheel, the work-bed where the material is placed, and a fixture which guides and holds the material. The wheels, which can vary in size, are generally made from a manufactured abrasive such as silicon carbide or aluminum oxide. Depending on the job, the grinding head can move along the material that is being worked on or the grinding head can be set to stay in a fixed position and the material can be moved around it. The grinding head and work-bed positions can be controlled with features such as a vernier calibrated hand wheel, numerical control, or computer numerical control.


There are several types of grinders. This is necessary because all of the machines are not designed to perform the same types of jobs. For example, a belted grinder is a power-driven grinding machine used to process metals with the aid of coated abrasives. These machines are generally used for three applications: finishing, deburring, and stock removal.


Bench grinders are generally manually operated machines that have two wheels. Each wheel is likely to have different grain sizes, which are used for roughing and finishing. These machines are commonly used to shape tools in need of repair, such as tool bits. They are also used to shape metal that needs to be welded. Their grinding wheels may have to be switched when working with harder or softer materials.


The jig grinder is used for a variety of functions involving jigs, dies, and fixtures. These machines can be used to grind complex shapes and holes with a high degree of accuracy. Jig grinders typically operate using a removable, high-speed air spindle to rotate the grinding bits. Whether the speed of a jig grinding machine is fixed or adjustable varies from one machine to another.


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Article Source: http://www.wisegeek.com/what-is-a-grinding-machine.htm


Grinding Machines

Grinding Machines are machines that grind or mill a specific material into smaller or finer particles. These machines vary enormously in their applications, and there is a huge range of grinding machines available, to assist in these grinding processes. Grinding machine is used to grind, grind away (material removal), or reduce various materials/mediums to a smaller size.

Some types of grinders are employed by the food industry for grinding foodstuffs ie; wheat into flour, while other types of machine can be found in the engineering industry, where they are used to grind metal into various shapes, or to sharpened a dull tool.

Grinding machines are designed for many different applications, and come in various shapes and sizes, from small handheld grinders, to extremely large machines also known as mills. These mills are floor mounted and can grind many tons of material/foodstuffs per day.

In the engineering industry there are several types of grinding machines, and these can include;

o Bench Grinder : A manual machine used for sharpening tools, this type of grinder usually has two wheels.
o Belt Grinder : Usually used for the sanding and finishing of wood.
o Cylindrical Grinder : The workpiece is rotated and moved across the wheel
o Jig Grinder : For finishing jigs and surface grinding milled surfaces
o Surface Grinder : The workpiece is held by a permanent magnet and is moved past the wheel
o Tool and cutter Grinder : For sharpening tools and other special tool room operations

These types of grinding machines have a power driven wheel and a bed or device to hold the workpiece. The grinding wheel or head can be moved over the workpiece, or the workpiece may be moved past the wheel, depending on the type of machine.

The grinding wheels are generally manufactured from a mix of coarse particles, which are pressed and bonded together into a solid circular shape, and can also be made from an aluminium or steel disc, and will have coarse particles bonded to their surface.

They are made to a precise process for safety reasons, such as to prevent the wheel coming apart or exploding when spinning at high speed. There are many types of grinding wheel and they are manufactured for many different kinds of applications.

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