12-09-2012, 04:42 PM
MILLING-GRINDING-DRILLING AND SLOTTING ATTACHMENT
Lathe Special attachment.pdf (Size: 464.27 KB / Downloads: 171)
DESCRIPTION
The milling-grinding-drilling and slotting attachment is commonly referred to as a Versa-
Mil. It is a compact, portable unit capable of doing many machining operations that
normally require expensive single-purpose machines. With the different attachments that
are available with the unit, drilling, shaping, milling, and grinding can be performed
quickly and inexpensively. This self-powered, vertical-feed, variable-speed precision tool
may be mounted in any position on the carriage, table, ram, turret, or tool arm of other
machine tools. With a two-directional feed table, the Versa-Mil unit becomes a complete
machining tool for bench or inplace machining of parts too large to be moved or held in
conventional machine tools.
USES
An important factor in the efficiency of the Versa-Mil is that machine tools already in the
shop area provide the power for feeds, a means of holding and moving the work, and the
rigidity needed for machining. Faced with unusual machining problems, the Versa-Mil
offers many solutions either as a separate tool or combined with other machine tools and
machinery already in the shop to create special machines. The Versa-Mil increases the
capabilities of standard machines by doing secondary operations without changing
setups. The Versa-Mil provides power to interchangeable attachments allowing the unit
to be used on site to perform different machining operations on equipment being repaired
or rebuilt. Where space is limited, as in a shop area, floor space is needed only for the
lathe. Different sizes of the Versa-Mil unit are available for light, medium, and heavy
machining. This chapter will be limited to the Series 31 (light machining unit).
TOOLS AND EQUIPMENT
VERSA-MIL BASIC UNIT
The Versa-Mil basic unit (Figure 9-1) has a powered machining head which moves
vertically on four hardened ground guide posts by means of a precision-ground lead
screw calibrated to 0.001 inch. Thirteen different speeds are available to the head through
the use of different size pulleys to accommodate all types of machining and cutter sizes
within the range of the unit. The circular T-slot on the face of the basic unit
accommodates a variety of attachments. The graduation marks on the basic unit indicate
the degree angle an attachment is to be positioned for various machining operations.
Heavy-Duty Deep-Hole Grinder
The heavy-duty deep-hole grinder (Figure 9-4) may be attached to the face of the Versa-
Mil for deep internal grinding. The deep-hole grinder accommodates grinding wheels 3 to
5 inches in diameter and grinds to a depth of 10 inches. A flat belt from the motor drives
the deep-hole grinder for smooth operation. Six spindle speeds are available to match the
spindle speed to the grinding wheel diameter and rating.
Universal Milling Head
The universal milling head (Figure 9-7) mounts to the face of the Versa-Mil and is driven
by the spindle of the basic unit. This feature eliminates the need for special belts and
permits the head to operate at any angle. The milling head and the basic unit have the
same spindle taper and use the same arbors. With the universal head, machining can be
performed along the side of the work, allowing the machining of much larger parts.
Angular operations such as thread milling can easily be performed on large diameter
material using the universal head.