For abrasive cutting in the field of metal processing, surface grinding is one of the most critical issues in the entire finishing process because after forming, cutting and other complex machining processes, many workpieces will enter this step for further finishing. With the step of surface grinding, a smooth finished surface can be produced on a flat or other specific surface. It is a widely used abrasive processing technology, through which the wheels of the spinning wheel are covered with rough particles, which cut off fragments of metal or non-metallic substances from the workpiece, thereby smoothing the surface of the workpiece.
There are many types of grinding machines, such as cylindrical grinding machines, internal grinding machines, centerless grinding machines. Since very early history, surface grinding has been one of the most common grinding methods in the industry, and until now it is still one of various grinding operations. CNC grinding is a finishing process, which uses a rotating grinding wheel to smooth the surface of metal or non-metallic materials in order to deliver a refined physical situation by removing the layer and impurities on the work piece surfaces under the control of computer numerical control mechanism that is driven by programmed processes. Based on the design of the column structure, the CNC based column surface grinder is a powerful machine for final polishing.
With the support of the column structure, the abrasive cutting process will obtain the required surface to achieve the functional purpose of engineer planning and programming. Regarding the mechanical composition, the mechanical structure of the surface grinder is composed of grinding wheel, workpiece holding device, and reciprocating worktable. During processing, the fixture will fix the material in place when processing the material. The clamping mechanism can be completed in two ways: one is to fix the ferromagnetic sheet in place by a magnetic chuck, and the non-ferromagnetic and non-metallic sheets are fixed in place by vacuum or mechanical means. The clamping mechanism is essential to the entire machining process, because only strict positioning and clamping devices can be used to complete the work accurately under precision standards.
In addition to CNC control and column structure, there are other factors that affect the grinding quality. The key factors affecting surface grinding are the material of the grinding wheel and the material of the workpiece. Generally, workpiece materials include aluminum, brass, steel, cast iron, and mild steel. Some of them are more stable and do not attach to the grinding wheel during processing, while others have different physical properties that can lead to corrosion and are not ideal for further applications. On the other hand, as far as the shape of the grinding wheel is concerned, the shape is not limited to a specific shape, but may be of various shapes. On-site operators can trim wheels for special usages and purposes. It is worth noting that in the surface grinding process, the shape of the grinding wheel will affect the reverse shape of the workpiece, so the operator must be aware of the shape change in order to immediately modify the grinding wheel, and the desired grinding could be carried on with smooth pace.
Surface grinders are machine tools used to provide precision grinding surfaces, and the purpose may have specific dimensions or for surface finishing, so the typical accuracy of surface grinders depends on the type and use. However, a certain precision value should be achievable on most surface grinders. Since the grinding machine consists of a table that can travel both in the longitudinal direction and along the grinding wheel surface, the longitudinal feed is usually hydraulically driven, and the cross feed can also be hydraulically driven. Any combination of manual, electric, or hydraulic pressure can depend on the grinding machine. The final use of the product should be clarified before purchasing, so the accuracy value must be set accurately before processing, otherwise the final output will be surprising.
Grinding is like other cutting-based machining, the grinding wheel rotates in the spindle head, and the height can also be adjusted by any of the above methods. Modern surface grinders are semi-automatic. The number of cuts and ignitions can be set in advance to determine the number of passes. Once set, the processing process requires little operator intervention. Depending on the workpiece material, the workpiece is usually clamped by using an electromagnetic chuck. However, it can be an electromagnetic chuck or a manually operated permanent magnet chuck. The machine provides the application of cooling liquid and the extraction of metal dust, so the processing process will not cause the operator to spread the mist.
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