2 FIELD OF INVENTION
The present invention relates to vertical boring machines, which are without copying template facility. More particularly, the invention relates to an all-angle settable universal taper facing & turning device mountable on conventional vertical boring machines.
BACKGROUND OF INVENTION
At present angular surfaces of any machineable jobs are machined on vertical boring machines (having no copying template facility) by tilting the angular head. The angular head is generally capable of being tilted to 0 to 35 degree only on either side. Thus, the angles between 35 to 45 degree can not be taper machined. The angles being measured along the Vertical axis, those between 0 to 10 degree from the horizontal axis, can not also be machined. Accordingly, the taper machining is presently being done with the help of special fixture & for every angle, a different special fixture is to be made, thus increasing the cost, time cycle & inventory of special fixture. Accordingly, an arrangement is essential to be developed which is capable of bridging the gap of angular measurement in a vertical boring machine.
OBJECT OF INVENTION
It is therefore an object of the invention to propose an all-angle-settable universal taper facing and turning device easily mountable on a conventional vertical boring machine without copying template facility which eliminates the disadvantages of prior art.

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Another object of the invention is to propose an all-angle-settable universal taper facing and turning device easily mountable on a conventional vertical boring machine without copying template facility which can be used for all angular surfaces with a least count equivalent to the machine tool's tilting head.
A still another object of the invention is to propose an all-angle-settable universal taper facing and turning device easily mountabie on a conventional vertical boring machine without copying template facility which eliminates the requirement of manufacturing and maintaining separate fixtures for measurement of each angular surface of a job.
A further object of the invention is to propose an all-angle-settable universal taper facing and turning device easily mountable on a conventional vertical boring machine without copying template facility which is one time mountable on the vertical boring machine thereby eliminating the need of repeatedly clamping and unclamping separate special fixtures thereby increasing the life of the device.
A still further object of the invention is to propose an all-angle-settable universal taper facing and turning device easily mountable on a conventional vertical boring machine without copying template facility which reduces the cost and machining time for the operation including the carrying cost of a huge inventory of separate fixtures.
SUMMARY OF INVENTION
Accordingly, there is provided an all-angle-settable universal taper facing & turning device mountable on a conventional vertical boring machine, comprising a slide, a left shank, a right shank and a roller. The device uses

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both the heads of the vertical boring machine tool to generate tapers. The device uses a tilting head of the machine to get a desired taper in horizontal axis. A single-point tool is used being clamped in correspondence with the vertical axis of the machine. The device is made of hardened alloy steel.
DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure 1 is a front view of the device according to the invention showing left and right hand sides of the device in relation to the vertical boring machine tool.
Figure 2 shows a plan view of the device along with sectional view 3 -3 of Figure 1.
Figure 3 shows side view of the device.
DETAIL DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION
The device uses both the heads of the machine tool. A left shank (2) is mounted on the left head tool post of the machine. A right shank (15) is mounted on the right head tool post of the vertical boring machine tool. The left shank (2) is having an open slot equal to the size of a roller (3). The roller (3) is held in a position by a nut (4), a pin (5) and a slide (1). The roller (3) moves in the open slot and creates a path for a single point tool via the slide (1). The slide (1) moves in a close slot formed by a plate (12), and at least one strip (6, 7) mounted on the right shank (15). Running fit is maintained between the slide (1) and the close slot formed on the arm of the right hand shank (15).

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The single point tool is mounted on the open slot in the slide (1). The single point tool is mounted on the slide (1) by means of a screw (11). The device is so configured that a centre line of the cutting edge of the single point tool coincides with a centre line (CL) of the Vertical Boring heads as shown in Figure 3.
The left hand tool post is rotated to the required taper angle to be machined in relation to the horizontal axis. Since the left shank (2) is mounted on the Left hand tool post of the machine, it (2) also attains the same angle as of the left tool post. Since the slot on the left shank (2) is at right angles from the tool post, the resulting angle formed by the single point tool shall be, only in relation to the horizontal plane. Thus, the angle made on the machine tool in the vertical plane is being converted to the horizontal plane. The slide (1) is pulled by the right shank (15), which is clamped on the right-side tool post of the vertical boring machine tool.
During operation, the right hand tool post is being given horizontal feed which holds the right shank (15). Accordingly, the single-point pool moves in a path followed by the roller (3) in the slot provided at the left shank (2). Taper is generated as per the path followed by the roller (3) which is held by the slide (1) on the surface being in contact with the single point tool.

6 We Claim
An all-angle-settable universal taper facing and turning device for taper machining, mountable on a conventional vertical boring machine without template copying means, the machine is having two tillable tool post heads (Right head & Left Head). The cutting edge of single point tool is clamped on the device matches with the Vertical axis of the vertical boring machine tool. The device comprising of :
- a left shank (2) mounted on the left hand tool post, and having
an open slot to accommodate a roller (3) of corresponding size,
the roller (3) being held at a position within the open slot by
means of a slide (1), a pin (5), and a nut (4), which can cause
the roller (3) to move inside the open slot thereby creating a
passage for the single-point tool attached to the slide (1) for
advancement;
- a right shank (15) disposed on the right hand tool post, and
forming on its arm, a closed slot by means of a plate (12) and
strips (6, 7), the slide (1) being moveable within the dosed slot,
wherein the centre line of the cutting edge of the single point
tool coinciding with a centre line (CL) of the machine, such that
movement of the left hand tool post corresponding to a desired
taper angle forms an equivalent angle by the tool in relation to
the horizontal plane, as the open slot is at a right-angle to the
left-hand tool post thereby converting the angle initially created
by the tool in the vertical plane to the horizontal plane.
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2. The device as claimed in claim 1, wherein the single point-tool is
mounted on the slide (1) by means of a screw (11).
3. The device as claimed in claim 1, wherein the right-hand tool post
holding the right shank (15) is given a horizontal feed which causes the
single-point tool to advance through the passage created by the roller
(3) provided at the left shank (2) thereby generating taper on a
surface in contact with the tool.
4. An all-angle-settable universal taper facing and turning device easily
mountable on a conventional vertical boring machine without copying
template facility as substantially described herein with reference to the
accompanying drawings.

Accordingly, there is provided an all-angle-settable universal taper facing & turning device mountable on a conventional vertical boring machine, comprising a slide, a left shank, a right shank and a roller. The device uses
both the heads of the vertical boring machine tool to generate tapers. The device uses a tilting head of the machine to get a desired taper in horizontal axis. A single-point tool is used being clamped in correspondence with the vertical axis of the machine. The device is made of hardened alloy steel.