Reciprocating grinding is the oldest form of surface grinding. It is characterised by low depths of cut between 0.005 and 0.03 mm and fast reciprocating table movements of around 15 to 30 m/min.
Reciprocating is a very cost-effective method for easy-to-grind materials, low number of work pieces and low stock removals. The initial investment for such grinders is also relatively low. These machines are typically found in tool mould making shops.
There are, however, some serious disadvantages inherent in the reciprocating process. The low depths of cut prevent proper chip formation and rapidly lead to wear flats on the abrasive grit resulting in wheel glazing and a high level of friction. This generates excessive levels of heat often causing thermal damage and micro cracking. Low depths of cut result in short arcs of contact. This, in combination with hard grades of grinding wheels and low machine rigidity, may cause detrimental chatter and vibrations.
Furthermore, with each reciprocating movement, the grinding wheel impacts on the edges of the work piece, increasing loss of form, and valuable production time is subsequently wasted on redressing. Additional time is also wasted in air-grinding at either end of each reciprocating table stroke.
Creep-feed grinding, on the other hand, eliminates the disadvantages listed above. However, this kind of grinding requires a considerable investment in a sophisticated machine tool.
Cosmos Impex, which can perform profile grinding as well as normal surface grinding, makes must have tools for any machine shop.
With Cosmos creep feed grinder, the serrations can be finished in a single set-up, with only three passes — one pass for roughing and two for finishing.
“There are several large or small components in the engineering industry,” Mr. Nanda, Director Grinding Division, Cosmos Impex, said, “and these can be machined in the least time in a single set-up on our machines.”
Earlier in 2011 when Cosmos Impex introduced this concept at IMTEX, it was appreciated by the Indian Machine Tool Manufacturers’ Association (IMTMA). It also won the prestigious FIE Foundation Award.
The company’s machines come equipped with an operator-friendly control panel as well as conversation programming along with standard G- and M-code programming.
Cosmos believes that the industry, in future, will prefer single machine for multiple application without compromising quality and expecting value for money.

Contact:Cosmos Impex (India) Pvt. Ltd.Cosmos House, 85/2 Atladra Padra Road, Vadodara, Gujarat – 390012Tele: +91-265-3927000Fax: +91-265-3927001www.cosmos.in