Precision machining of small disk parts

Parts are getting smaller and smaller, but the precision requirements are getting higher and higher. In order to comply with the development requirements of this trend, EMAG developed a modular structure of the machine series VG 110.

The VG series of inverted machine tools is designed by EMAG for machining small and very small workpieces. VG 110 is a production grinding machine for batch processing of high-Precision Parts. It can realize combined machining processes of internal circular grinding, cylindrical grinding, non-circular grinding and hard turning and grinding. The machine covers an area of ​​only 5.3m2, the machinable workpiece diameter is 2 ~ 60mm, the work piece length that can be clamped is 125mm, the maximum processing length is 60mm.

Structure features of machine tools

The bed of the VG series machine is cast from advanced polymer and has the characteristics of good thermal stability and strong shock resistance. The X-axis and Z-axis are separated, so the machining accuracy is high when machining small parts. The vertical Z-axis is driven by a linear motor, so the grinding spindle has a short and fast amplitude. In the vertical machine arrangement, the X-axis, which plays a decisive role in machining accuracy, is removed from the processing area. The resolution of the measurement system is extremely high, and it is installed only 100mm away from the processing area. The machining accuracy of the machine tool can reach 0.5 to 1mm.

Frequency conversion AC motor spindle as the workpiece spindle, with light weight, large torque characteristics, so the machine is good dynamic. Because the machine tool has small travel, high speed, and high rigidity, it also has a built-in cooling system to cool the electric spindle, grinding spindle, linear drive system and electrical cabinet. Therefore, the non-machining time in the production process is extremely short and the production efficiency is high. Accuracy is good. In addition, a rotatable E-axis on the turret compensates for the deflection of the grinding wheel mandrel.

The product's modular machine tool structure allows users to assemble different tools for different machining needs. VG series machine tools can adopt the following different configurations: configure one or two internal grinding spindles; configure one internal or external grinding spindle and one turning tool.

The VG series machine adopts Siemens SINUMERIK 840D control system, and cooperates with EMAG's own developed software, which is easy to use and brings convenience for programming and operation.

Short loading and unloading time

Reducing the loading and unloading time is extremely important for shortening the processing time. When the VG series machine tool is processing special small parts, the workpiece spindle can be fed for only 1.5s, which is very fast. For workpieces that the spindle cannot transport by itself, the workpiece is fed into the processing area by a feed mechanism, which is then transported by a lifting table to the clamp position. The loading and unloading time is slightly different due to the different fixtures, generally within 4s.

Advanced processing technology

The VG 110 grinding machine offers all the advanced grinding technology that meets all the requirements of today's users for advanced grinding machines, such as high production efficiency, good machining accuracy, short cycle times, low machining costs per piece and advanced grinding technology .

When using the VG 110 grinding machine, one can carry out both the "traditional" grinding and the full advantages of the double grinding process integrated in one machine: the use of a reliable turning process for all parts of a soft car or hard car. , Then grinding the higher quality parts in the same fixture. The combined grinding process not only ensures a higher workpiece quality, but also shortens the cycle time and reduces the wear of the grinding wheel and the number of wheel dressing operations.

The VG 110 grinding machine is capable of a wide range of machining processes and can be used either stand-alone or on-line to an automatic production line as an indispensable link for turning, internal and external circular grinding and face grinding.

These advantages make the VG series machines the first choice for producing small, high-precision parts. These parts include: tappets and valve bodies for advanced injection technology, rollers and bushings for jet pumps, stators for jet pumps and servo pumps, air conditioners for cars, radial piston pumps and radial piston hydraulic motors, Inner and outer locking rings for tool holders and drive shafts, cylinder liners, gears, etc.