Take you to know the boring machine
Boring machine processing is the main tool in the rotation of the movement, the workpiece movement for the feed movement. Boring machine machining out of the workpiece accuracy is higher. Generally, there are two or more concentric holes (a higher concentricity of the hole) on a workpiece or a higher accuracy of the hole. For example, if the hole is equipped with a high-precision part or part such as a bearing, Need to work in the boring machine above the hole. Here we are on the universal milling machine used above the ram for processing, look at the example.
(This picture is a local processing drawing of the ram)
Baseline C above the two holes, we see the hole diameter is 52, the precision is K7 (diameter 52K7 is the hole processing range between 52.01-51.98). We look at the position and tolerance requirements of the upper and lower holes of the concentricity of 0.02mm, and to ensure that the benchmark B parallelism in the 0.04mm. There are two requirements that we can determine what machine needs to be used for processing.
In general, the cold working methods are: lathe (for circular workpiece processing), milling machine (on the plane, irregular holes, edges and other places for processing), planer (for the plane, slotted, the angle of the required workpiece processing, Generally in the universal milling machine can also be carried out above), grinding machine (grinding plane, dovetail, etc., the use of this machine is generally on the workpiece finishing can not be large, the workpiece surface roughness requirements are higher, the general grinding machine can be processed Surface roughness 1.6), drilling machine (for the hole above the workpiece processing), boring machine (the need for high precision machining hole), shear bed (rectangular plate type cutting), punch (for larger types of sheet Processing, but the thickness can not be too large), EDM (to a variety of shapes for processing, the advantages of high precision machining, a wide range of shortcomings is slow processing).
Above is commonly used cold processing means, many models of machine tools are based on the evolution of these machines, such as CNC milling machine, machining centers. From the above a variety of different ways to use the machine tools to analyze and deal with the accuracy of the hole requirements of the workpiece, it is best to use boring machine. Of course, with the development of the times the accuracy of the processing center is also very high, if it is a small workpiece, can also be processed in the processing center above. If it is a large workpiece, then the number is also a lot, it is recommended to use CNC boring machine.
References:
https://en.wikipedia.org/wiki/Boring_(manufacturing)
http://www.productionmachining.com/blog