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Posted on Dec 12, 20187
The concept of internal grinding refers to the grinding of bores and holes. This grinding process may be one of the most difficult grinding processes in the industry.
The concept of internal grinding refers to the grinding of bores and holes. This grinding process may be one of the most difficult grinding processes in the industry. Internal grinders are internal grinding tools or machine tools used for cylindrical profiles. It uses grinding wheels as cutting tools and is a common type of machining.
Each abrasive particle on the grinding wheel cuts a small piece from the work piece by the shear deformation method. Due to the wide range of uses, grinding machine has a large number and its classification is very complex. Common types of grinders include belt grinders, belt grinder, bench grinder, cylindrical grinder, surface grinder, tool & cutter grinder, jig grinder, gear grinder, die grinder, angle grinder, and roll grinder.
Internal grinder may include multiple grinding wheels for different purposes. By rotating the work piece and passing it through one or more grinding wheels, the inner wall of the cylindrical profile is formed. The internal grinder can be used to make precision pipes, tubes, bearing races, bushings, and many other parts.
:: Read more : How to pick the best Surface Grinding Wheel
Internal grinder is a special type of grinding machine, designed for grinding the internal diameter of the work piece. Although in most grinding details, internal grinding is almost the same as cylindrical grinding for grinding the internal diameter, there are some key differences between the two. Most importantly, the requirements of internal grinding are very wide. It can remove the blank very quickly and complete the concentricity (in millionths of a millimeter). In addition, it is very important to choose the correct grinding wheel.
Rolls are commonly used in the processing of paper, paint, steel, textiles and rubber materials. The length of the roll varies from a few centimeters to six meters or even longer. Over the entire length, a highly polished surface is required. In actual use, these rollers can give the sheet metal work pieces a higher finish quality.
If the roll is used for cold forming metal, the huge pressure between the work piece and the roll will cause the roll to bounce off in the center. In this case, if a completely uniform roll is used, the rolled metal will be thicker at the center and thinner at the edges. Therefore, it is necessary to carefully calculate the correct curve of the roll surface. In addition, when performing roll grinding, a convex surface should be used for processing to improve accuracy. Generally, roll grinders have the ability to rotate the rolls on their own bearings, and can also rotate in the center of the tailstock and headstock.
Similar to internal and external grinding, the grinding head of a surface grinder is lowered to the work piece, which moves back and forth under the grinding wheel on the table. The table usually has a controllable permanent magnet, which can be used to fix magnetic or metal work pieces. If the work piece is not magnetic or metallic, use a vacuum chuck or other fixing device. The most common surface grinder has a grinding wheel that rotates along a horizontal axis, and the grinding wheel grinds with its outer periphery.
The rotary surface grinders, usually called "Blanchard" type grinder. This type of grinding machine has a grinding head that rotates the grinding wheel on an axis perpendicular to the end face of the grinding head, while the table below rotates the work piece in the opposite direction. Rotary surface grinders can remove large amounts of material and grind on surfaces with obvious spiral grinding marks. It can also be used to make and sharpen die sets, flat shear blades, fixture bases or any flat surface. The rotary surface grinder can be operated manually or under CNC control.
Today's grinding machines can be pre-set by the machine engineer to set the working path, and the machine operator can partly modify to meet different processing requirements. The CNC controlled machine is equipped with a humanized operation panel, which can accurately display the grinding movement. The friendly man-machine interface not only ensures accurate operation, but also provides great convenience in any aspect.
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