Carriage grinders are carriage grinding machines that can do rail and carriage grinding process in a series of manipulation under the control of CNC programming systems. The mechanism of the carriage grinding machine integrates many grinding features such as surface grinding, external grinding, roll grinding, profile grinding, and other similar grinding mechanism.
Since carriage grinding integrates various kinds of grinding mechanisms, it is a high end processing machines that can achieve high precision rails and carriages processing within a specific working conditions and time spans. Here we will introduce each working mechanism separately. Readers will know how they work when it is about precision grinding.
For industrial machining, surface grinding is one of the most important part in the whole finishing process. After forming, cutting, and other complex processing, many work pieces would go to this step for further finishing. The process of surface grinding is used to produce a smooth finished surface on either flat or other specific surfaces. It is a widely used abrasive machining process by which a spinning wheel is covered in rough particles that cuts chips of metallic or nonmetallic substance from a work piece, rendering a flat or smooth face.
Among all the grinding processes, surface grinding is the one of the most general one of the various grinding operations. CNC surface grinding is a finishing process which utilizes a rotational abrasive wheel to smooth the surface of metallic 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 programmed cutting routes that is driven by professional grinding systems. Therefore, these processes will attain a desired surface for functional purposes that are planned and programmed by engineers.
Regarding the mechanical composition, the mechanical structure of surface grinders are composed of an abrasive wheel, a work piece holding device, and a reciprocating table. During machining, the holding device holds the material in place while it is being machined. The clamping mechanism can be done via two methods: one is for the ferromagnetic pieces, which are held in place by a magnetic chuck, while for the non-ferromagnetic and nonmetallic pieces, they are held in place by either vacuum or mechanical means. The clamping mechanism is crucial to the whole processing since only with the rigid positioning and clamp, can the work be done accurately and precisely.
Roll grinding is similar to cylindrical grinding but roll grinders are designed differently with distinctive working mechanism. A roll grinder is a powered grinding tool or machine tool that used for grinding process, which is a common type of machining that utilizes abrasive wheel or wheels as the cutting means for processing.
To be specific, although roll grinding is nearly the same as cylindrical grinding in most of the processing details, there are some critical differences between the two categories. First of all, roll grinding method is developed specifically for certain issues that usually require machines that are designed for heavy works. Therefore, these machines are larger in size, heavier in weight, and are more rigid if compared with plain cylindrical grinders.
These machines have no provision for doing tapered works and tasks. Rolls are commonly used in many industrial sectors for processing products, for paper, paint, steel, textiles, and rubber material processing. The length of the rolls varies from a few centimeters up to six meters or more, and throughout the length, a highly finished surface is required. In practical usages, these rolls give sheet metal work pieces the high finish, which is required without polishing or further buffing.
Carriage grinders also contain some grinding elements of cylindrical grinding. A cylindrical grinder is one of the grinding machines that are used to shape the outer side of work pieces through the grinding mechanism. It can process a variety of shapes; however, the object must have at least a central axis of rotation so that it can be spinning concentrically. This includes but is not limited to such shapes as cylindrical, but from such as cam, ellipse, crankshaft, etc.
The essential definition of cylindrical grinding is that the machine must have four critical actions: Firstly the work piece must be constantly rotating; secondly, the grinding wheel, i.e. cutter, must be rotating constantly; thirdly, the grinding wheel is fed forwards and backwards towards the work piece. Last, work pieces are traversed with respect to the grinding wheel. The majority of cylindrical grinders nowadays utilize all the four movements, while there are still grinders that only utilize three of the four actions to process.
A carriage grinding machine is designed with many elements introduced above for the precision rails and carriage processing. The CNC control system of this type of machines is hence very crucial so that the working efficiency could be improved. With this machine, manufacturers are able to do a complicated series of profile processing with one single machine station.
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