Tool grinder cnc

Types of CNC Tool Grinders

CNC tool grinders are specialized milling machines used to shape and sharpen cutting tools like drill bits, end mills, reamers, and burrs. These grinders have flexible spindles that can be adjusted to suit tools of varying sizes and geometries. Some models also feature automatic tool holding systems for faster processing. While most CNC tool grinders serve similar purposes, they can be classified into distinct types based on design, structural features, and functionality.

• Cylindrical CNC Tool Grinder:

  This cylindrical grinder is one of the most common CNC tool grinder types. It employs a grinding wheel to sharpen cutting tools with complex shapes. As the tool holder rotates the tool around a fixed axis, the grinding wheel moves along different parts to cut and polish.

• Universal CNC Tool Grinder:

  A universal tool grinder is like the cylindrical grinder, but it has more features for sharpening tools with various shapes and sizes. It has multiple attachments and a worktable that can be changed to different angles. This allows the grinding wheel to reach different areas of the cutting tool.

  This grinder is good for sharpening cutting tools like end mills, taps, reamers, and drill bits. Using a universal grinder gives an operator more control and precision when sharpening tools.

• Multi-Axis CNC Tool Grinder:

  The multi-axis grinder stands out because it has several workpiece axes. Some models feature as many as 6 or more fully programmable axes. This gives operators the ability to fully automate the grinding of tools with complex geometries.

  Additionally, these grinders often come with full simulation software. The software lets users model and simulate a tool before starting the real grinding process.

  Having multiple automated axes creates opportunities for precise machining and unattended operation at high productivity.

• Peck Grinders:

  Also known as the punch grinder, this machine is used for grinding punches and dies in Jigs or Dyes industries. It is small and fits as a die holder in a dye holder.

  The grinder cannot grind internal holes, threads, or taps, as it cannot be modified to perform these tasks. It is used to perform external grinding. It is not efficient at removing a lot of material quickly. As a result, it often grinds in small increments or pecks.

Specification and Maintenance of CNC Tool Grinders

Three main parts make up the structure of a CNC tools grinder: the base, which is the stand or support; the spindle and worktable, which carry and rotate the tools; and the feeding system, which provides the means for the tools to be fed to the grinder.

The bases for grinders can vary in size depending on the weight and support required to stabilize the grinding of the tool. The grinder's base is usually made of cast iron or steel, materials heavy enough to remain immovable during operation, and sturdy enough to hold the machine's weight.

Spindles in grinders usually have a fixed motor, directly integrated into the spindle, or a belt-driven motor. The motor can rotate at fixed or varying speeds, usually enough to grind various materials. This part of the grinder is often manufactured from hardened steel.

Spindle design may have some holding mechanism, like a chuck, to grip the tools. While the end of the spindle may have a female thread so that grinding wheels or discs can be directly attached to it, other mechanisms, such as flanges, are utilized to create a secure fit. Generally, threads on the spindle are referred to as familiar threads which may require different mechanisms.

Another distinctive feature of the spindle may include a quick-discharge button when operators change the tool or grinding wheels quickly. It may involve some hold-downs, hand-blocks, or jaws to secure it. Changes may usually involve using the socket or a spanner used for combining the jaws of the chuck.

Like all other grinder types, the worktable on tool grinders is fixed or adjusted horizontally and vertically by screws, wheels, clamps, etc., to set the tool's position when grinding. The material is usually aluminum alloy, stainless steel, and iron, enabling stable support for the items being ground.

Worktables have sections like slots for t-bolts to clamp tools and often rectangular holes to align with columns on the bases. Other areas may include those with circular holes for tools or sockets to be clamped onto the worktable directly, as seen in woodworking tool grinders.

Worktables may also include features like graduated stops, holes, an axis of the head that drills on the worktable, holes, and drill depth adjustment mechanisms.

Feeding systems on a CNC tool grinder usually refer to the methods of feeding or presenting the tools to be ground. They are usually automatic with high-precision ball screws, servo motors, and linear guides. They can move horizontally and vertically, usually along the x, y, and z axes, to present tools at different angles for grinding.

Due to electric and electronic parts in a CNC tool grinder, like the controller and motor, their maintenance is necessary to avoid malfunctions. The following advice is crucial and must always be followed.

• Regular Checks: Conduct daily inspections before and after use. This may include visual inspections, checking part curves, straight lines, angular dimensions, sizes, smoothness, and, if necessary, mildly cleaning with a dry, clean rag.
• Tightening the Machine: Bolts, nuts, and bearings on the machine must be regularly gapped and tightened according to the manufacturer's specifications. The spindle bearings, jaw bearings, and spindle nut should be inspected for wear and tear and replaced if required to prevent loosening.
• Lubricating Parts: Lubricate guides, ball screws, and other gear parts on the grinder, including open gears, bearings, chains, and drive belts, as per the lubrication chart provided in the instruction manual.
• Drive Belts: Check the tension and wear and tear on the drive belts, including timing and V-belts, to ensure proper alignment and tension. Clean them if they have any foreign material, like grease or oil, and replace them before they are worn out, usually determined by uneven rounded areas or tooth wear on timing belts.

Applications of CNC tool grinders

Due to their high precision and efficiency, CNC tool and cutter grinding machines are essential in the manufacturing industry. These machines are mainly used in the automotive, aerospace, medical, military and wood industries.

In the automotive industry, CNC grinders are used to manufacture various automotive components such as valves, seats and steering knuckles, to name a few. Tool grinders achieve high-precision cuts and help create complex shapes and patterns. Some have even been automated to increase productivity and reduce labor costs.

In the aerospace industry, CNC tool grinders are used to produce sophisticated aircraft components, including nozzles, turbine blades and rotor blades. CNC grinders can produce lightweight components that are still robust enough to meet the requirements of the aerospace industry.

Apart from this, CNC tool grinders can also be used to grind tools used in the medical industry. Medical devices demand the highest precision, just like devices used in the aerospace industry. Therefore, only tools that can achieve this level of precision are used to make them. Grinders are used to make surgical instruments, dental equipment, and orthopedic devices, to name a few.

Military equipment also needs the highest level of precision. Therefore, high-precision CNC grinders are used to process tool bits and cutters used to make military weapons and equipment like rifles, ammunition, grenades, radar, naval ships, missiles and military satellites.

Finally, these grinders are widely used in woodworking industries. They are used to grind tools and cutters used to process wood and produce wooden products like furniture, cabinetry and flooring.

Apart from the above industries, CNC grinders can also be used in tool manufacturing and cutting industries. Therefore, their applications are endless!

How to Choose CNC Tool Grinders

CNC tool grinders are incredibly diverse, satisfying various markets and applications. When choosing their product catalog, business buyers should prioritize focused yet varied offerings. Here are some helpful tips on what to stock when supplying this massive market in need of tool grinders.

• Choose What Satisfies Parameter Requests

  Focal points when selecting machinery include the frame or bed, wheel spindle, fixture, feed mechanism, and other crucial parameters that influence its performance. When choosing a catalog to sell, business buyers should stock grinders that meet the demands of a target clientele. For instance, those catering to delicate knife manufacturers should focus on saw blade tool grinders, while small workshops may prefer portable models.

• Choose a More Advanced Machine

  Generally, a sturdy bed, a powerful spindle with fast-scheduled wheel rotations, and a precise feeding system are necessary for an efficient tool grinder CNC. Nevertheless, some clients aiming to save costs may be okay with a less advanced machine as long it fulfills their grinding needs. These grinders will have the bare minimum specifications to work and will be much cheaper. When stocking a catalog, business buyers should consider what their clients are likely to pick and choose.

• Take DC

  A DC tool grinder generally has a simple structure, low noise, and easy maintenance. It is an adaptable and widely used machine. Some models have a frequency conversion speed regulation function, which can change the rotating speed as preferred. This enables the tool grinder to work with various tools, improving its versatility. Nonetheless, grinding tools with DC motors demand particular knowledge of commutation and carbon brushes.

  Some clients may prefer the more sophisticated and efficient AC motor tool grinders that work with high power and have higher productivity. Business buyers should take both types of grinders to fit the needs of all possible clients.

• Consider the Number of Units Ordered

  Generally, distributors have no choice but to take more advanced machines to satisfy a high-skill market. However, they should negotiate for lower prices when ordering in bulk. Enterprises intent on reselling but with small capital may have to take a more considerable risk by ordering smaller but more varied catalogs that focus on certain target markets.

• Stock Spares and Accessories

  A to c tool grinder has to be equipped with a power supply, digital display, manual, etc. It may also have several wheel spindles and fixtures to improve its versatility. Some models have an optional CNC driving system that further enhances precision. When stocking options, business buyers should take various power supplies plus some fixturing accessories and wheel spindles to cater to demanding end users seeking variety.

Tool grinder CNC FAQ

Q1: How does a tool grinder CNC differ from manual grinders?

A1: While both machine types can shape materials, the advantages of using a tool grinder CNC over the manual type are numerous. Considering the tool grinders that use CNC may offer higher levels of consistent accuracy than manual control. Furthermore, machines with CNC capability have automatic operation and faster production speed.

Q2: What materials can be ground using a CNC tool grinder?

A2: Material compatibility depends largely on the type of grinding machine. An air grinder is suitable for working on softer materials such as aluminum or wood, while harder metals such as steel or stainless require a more advanced unit like laser or electric-powered ones.

Q3: Are CNC tool grinders easy to operate?

A3: Modern grinders are designed for user-friendliness and come equipped with intuitive controls plus pre-programmed grinding profiles. Nonetheless, operators must be trained properly in order to understand how to set up the machine correctly as well as select appropriate settings.

Q4: Can CNC tool grinders be used for materials other than metal?

A4: Yes, though primarily designed to grind metal, some higher-end models can also handle plastic or even ceramics provided the right type of grinding wheel is fitted onto them.