FIELD OF THE 5 INVENTION
This invention relates to fixtures for machining operations in multiples planes on
milling machine. More specifically, it relates to a fixture, which may be used to hold and
10 locate the workpiece of various shape and size. Fixture used to hold the workpiece in
multiple planes in manner that all reference surfaces given on job is properly positioned
for the multi axis machining of the workpiece.
15 BACKGROUND OF THE INVENTION
This invention pertains to fixtures for holding the workpiece on machining
center, and more particularly to a holding fixture adapted to support work to be
machined in multiple planes and locate it relative to the cutting tool. An object of this
20 invention is the provision of a new and improved workpiece holding fixture for
machining operations on milling machine which is rigid, rugged, compact, and capable
of high precision holding of workpiece. This fixture helps to minimize the setup time and
maximize the productivity.
25
SUMMARY OF PRESENT INVENTION
In accordance with one aspect of present invention is to provide a fixture that
30 facilitates holding of a workpiece in multiple planes for multi‐axis machining operations
on a milling machine and supporting the walls of the workpiece at different planes
thereof while the workpiece is being machined on a particular plane to a predetermined
shape and size.
In accordance with second aspect of present invention is to provide a fixture for
holding the workpiece for accurate positioning of workpiece on fixture with respect 5 to
multiple machining surfaces.
In accordance with another aspect of present invention is provided a fixture for
rigid clamping of workpiece.
In accordance with yet another aspect of present invention is to provide a fixture
10 for holding workpiece adapted to be fixed on the bed of milling machine for multi‐axis
milling operations.
In accordance with yet another aspect of present invention is to provide a more
rigid fixture to hold the workpiece.
. In accordance with yet another aspect of present invention is to provide a
15 fixture for holding workpiece in multiple planes.
In accordance with another aspect of present invention is to provide a lighter
fixture for holding the workpiece.
In accordance with yet another aspect of present invention is to provide a fixture
that can be properly and effectively utilized to hold and firmly fixed the workpiece by
20 lesser skilled individuals.
In accordance with yet another aspect of present invention is to provide a fixture
for holding a workpiece that have supports pin to support workpiece at multiple planes
to eliminate the distortion during machining due to vibration.
25 BRIEF DESCRIPTION OF THE DRAWINGS
The features and advantages of the present invention will become more apparent and
descriptive in the description when considered together with figures/flow charts
30 presented:
Fig. 1 is a Sectional Front view of fixture for holding workpiece in multiple planes
Fig. 2 is a Top view of fixture for holding workpiece in multiple planes
Fig. 3 is a Sectional side view of fixture for holding the workpiece
5
DETAILED DESCRIPTION
Referring to fig. 1, 2 & 3 present invention is a fixture 17 used to hold and
position the workpiece 16 in multiple planes and adapted for use on multi axis milling
10 machine. The fixture 17 is designed to hold the workpiece 16 within dimensional
tolerance with respect to multiples planes.
Fixture 17 for holding a workpiece 16 comprises a base plate 1 having a substantially flat
top surface A and bottom surface B. Base plate is made of mild steel. Surface B of base
plate, rest on milling machine bed. Fixture 17 is fixed on the milling machine bed with
15 the help of four through counter bore holes 18.
Work piece 16 rest on surface C of block 2 mounted on surface A of the Base
Plate 1 with the help of Four Allen head screw 11. The hanging part of the workpiece 16
is supported at separate plane by the support 5 mounted on the base plate 1. The
support is mounted on the base plate by using two nuts 12. The height of support 5 can
20 be adjusted with the help nut 12. Two clamping pads 6 have been provided on the two
clamps 3 to hold at desired position the hanging portion of the workpiece 16. The
clamps 6 are assembled with base plate with the help of two Allen head screw 10 and
two Allen head screw are provided on the clamps 6 for providing adjustment during the
fixing of the workpiece 16.
25 Further the bottom surface of the workpiece resting on the surface C of the
block 2 is fixed to the block with three Clamps 4 mounted on the block 2 by three Allen
head screw 8. These clamps 4 are provided with Allen head screws 7 for adjustment
during the clamping of the workpiece 16. The vertical portion of the workpiece 16 is
supported on the surface 13 of the block 2. Two guide pins 19 provided on the Block 2
30 for locating the workpiece accurately on the top surface C.

WE CLAIMS:-
Accordingly, the description of the present invention is to be considered as illustrative only and is for the purpose of teaching those skilled in the art of the best mode of carrying out the invention. The details may be varied substantially without departing from the spirit of the invention, and exclusive use of all modifications which are within the scope of the appended claims is reserved. We Claim

1. A fixture for holding workpiece and supporting the walls of workpiece on multiple planes adapted to be positioned on work table of milling machine. The fixture comprising:
- Base Plate adapted to be coupled to the bed of milling machine and provides supporting surface to other sub component of fixture. Workpiece rest and positioned on the top surface of base plate.
- A block is rigidly coupled to the top surface of the base plate with Allen head screw on which the workpiece will be placed.
- Support structure to support the hanging portion of the workpiece at different plane and adjustment nut provided to adjust the height of the support for supporting the workpiece during the machining operation.
- Clamps provided to hold the workpiece at different points for holding the workpiece at different planes during machining operation at a particular plane.
- Two Clamps provided to hold the workpiece at different points for holding the workpiece at different planes during machining operation at a particular plane.
2. The fixture for holding workpiece of claim 2 wherein, top and bottom surfaces of the base plate are substantially parallel and bottom surface of the base plate is adapted to positioned and clamped on the milling machine bed.
3. The fixture for holding workpiece of claim 2 wherein, base plate is having four counter bore holes on base plate for fixing the fixture on machine bed.
5. The fixture for holding workpiece of claim 1 further comprising a block mounted on the top surface of the base plate with the help of Allen head screw.
6. The fixture for holding workpiece of claim 1 comprising five clamping pad for precisely holding the workpiece during the machining operations and remove the chances of the damages due to vibrations.
7. Two guide pins provided on the top surface of the block for accurate positioning of the workpiece in predetermined position.
8. The fixture for holding workpiece of claim 1 further comprising two clamping pads to hold the hanging portion of the workpiece accurately at a predetermined.
9. The fixture for holding workpiece of claim 6 further comprising Allen head screw for enabling adjustment during the mounting of the workpiece. ,TagSPECI:As per Annexure-II