Talking About the Plain Surface Grinding

Plain surface grinding is a machining process used to create a smooth and flat surface on a workpiece. The workpiece usually is steel or carbide material. These workpieces can be stamping die components, plastic injection mold components, automation components or fixture components, etc.

You will get efficient and thoughtful service from MetalsKingdom.

Plain surface grinding involves the use of a grinding wheel to remove material from the surface of the workpiece. It will get precise and even finish. In the machining industry, there is a roughness parameter that is called RA value, or VDI value, or a symbol of the inverted triangle. For example, RA0.30, VDI 10, etc.

Plain surface grinding is a semi-automatic and semi-manual work, the machine is called a plane grinder or plain surface grinding machine. The operator is also called a machinist. Of course, there may be some full automation grinding machines in the future, but in order to control better precision, manual operation is essential.

The surface grinding process typically begins with the selection of a suitable grinding wheel, which is mounted on a grinding machine. The workpiece is then placed on the machine&#;s work table, and the grinding wheel is brought into contact with the surface of the workpiece.

Usually, the workpiece is fixed on the platform, as the grinding wheel rotates, it removes material from the workpiece by abrasion. The grinding machine is typically equipped with a coolant system to prevent overheating and to wash away any debris or swarf generated during the grinding process. The grinding process continues until the desired dimensions and surface roughness are achieved.

Plain surface grinding is commonly used in manufacturing and metalworking industries to create flat surfaces on components such as machine parts, die components, mold parts, and tool components in steel or carbide material. It is also used for surface preparation before further machining operations, such as milling, drilling, EDM, or profile grinding.

Overall, plain surface grinding is a versatile and precise machining process. It allows for the creation of smooth and flat surfaces on various kinds of mechanical components.

Machine tool used for grinding

Rotating abrasive wheel on a bench grinder. Pedal-powered grinding machine, Russia, .

A grinding machine, often shortened to grinder, is a power tool (or machine tool) used for grinding. It is a type of machining using an abrasive wheel as the cutting tool. Each grain of abrasive on the wheel's surface cuts a small chip from the workpiece via shear deformation.

Grinding is used to finish workpieces that must show high surface quality (e.g., low surface roughness) and high accuracy of shape and dimension. As the accuracy in dimensions in grinding is of the order of 0.  mm, in most applications, it tends to be a finishing operation and removes comparatively little metal, about 0.25 to 0.50  mm depth. However, there are some roughing applications in which grinding removes high volumes of metal quite rapidly. Thus, grinding is a diverse field.

Overview

[

edit

]

The grinding machine consists of a bed with a fixture to guide and hold the workpiece and a power-driven grinding wheel spinning at the required speed. The wheel&#;s diameter and the manufacturer&#;s rating determine the speed. The grinding head can travel across a fixed workpiece, or the workpiece can be moved while the grinding head stays in a fixed position.

Fine control of the grinding head or table position is possible using a vernier calibrated hand wheel or using the features of numerical controls.

For more information, please visit Plane Grinding Machine.

Grinding machines remove material from the workpiece by abrasion, which can generate substantial amounts of heat. To cool the workpiece so that it does not overheat and go outside its tolerance, grinding machines incorporate a coolant. The coolant also benefits the machinist as the heat generated may cause burns. In high-precision grinding machines (most cylindrical and surface grinders), the final grinding stages are usually set up so that they remove about 200  nm (less than 1/  in) per pass - this generates so little heat that even with no coolant, the temperature rise is negligible.

Types

[

edit

]

A surface grinder. A cylindrical grinder.

These machines include the:

• Belt grinder, which is usually used as a machining method to process metals and other materials, with the aid of coated abrasives. Analogous to a belt sander (which itself is often used for wood but sometimes metal). Belt grinding is a versatile process suitable for all kind of applications, including finishing, deburring, and stock removal.
• Bench grinder, which usually has two wheels of different grain sizes for roughing and finishing operations and is secured to a workbench or floor stand. Its uses include shaping tool bits or various tools that need to be made or repaired. Bench grinders are manually operated.
• Cylindrical grinder, which includes both the types that use centers and the center less types. A cylindrical grinder may have multiple grinding wheels. The work piece is rotated and fed past the wheel(s) to form a cylinder. It is used to make precision rods, tubes, bearing races, bushings, and many other parts.
• Surface grinder, which has a head that is lowered to a work piece, which is moved back and forth under the grinding wheel on a table that typically has a controllable permanent magnet (magnetic chuck) for use with magnetic stock (especially ferrous stock) but can have a vacuum chuck or other fixture means. The most common surface grinders have a grinding wheel rotating on a horizontal axis, cutting around the circumference of the grinding wheel. Rotary surface grinders, commonly known as "Blanchard" style grinders, have a grinding head that rotates the grinding wheel on a vertical axis cutting on the end face of the grinding wheel, while a table rotates the work piece in the opposite direction underneath. This type of machine removes large amounts of material and grinds flat surfaces with noted spiral grind marks. It can also be used to make and sharpen metal stamping die sets, flat shear blades, fixture bases or any flat and parallel surfaces. Surface grinders can be manually operated or have CNC controls.
• Tool and cutter grinder, which usually can perform the minor function of the drill bit grinder or other specialist toolroom grinding operations.
• Jig grinder, which as the name implies, has a variety of uses when finishing jigs, dies, and fixtures. Its primary function is in the realm of grinding holes for drill bushings and grinding pins. It can also be used for complex surface grinding to finish work started on a mill.
• Gear grinder, which is usually employed as the final machining process when manufacturing a high-precision gear. The primary function of these machines is to remove the remaining few thousandths of an inch of material left by other manufacturing methods (such as gashing or hobbing).

Centre Grinding Machine

• Centre grinder, which is usually employed as a machining process when manufacturing all kinds of high-precision shafts. The primary function of these machines is to grind the centers of a shaft very precisely. Accurate round center holes on both sides ensure a position with high repeat accuracy on the live centers.
• Die grinder, which is a high-speed hand-held rotary tool with a small diameter grinding bit. They are typically air-driven (using compressed air), but can be driven with a small electric motor directly or via a flexible shaft.
• Angle grinder, another handheld power tool, often used in fabrication and construction work.

See also

[

edit

]

References

[

edit

]

• Harvey, James A. Machine Shop Trade Secrets.

• Choudhury, A.K. Hajra. Elements of Workshop Technology.

• Gupta, R.K. Manufacturing Engineering.

For more Hand Valve Grinderinformation, please contact us. We will provide professional answers.