The present invention relates to process for preparing study the component single part fine
blanked plate comp shift drum stopper/plate comp. gear shift cam single part fine blanked
Plate Comp. Shift Drum Stopper/Plate Comp. Gear Shift Cam.
It is known to have a sequential manual transmission (or sequential manual gearbox) is a non-
traditional type of manual transmission used on motorcycles and high-performance cars for
auto racing, where gears are selected in order, and direct access to specific gears is not
possible.
With traditional manual transmissions, the driver can move from gear to gear, by moving the
shifter to the appropriate position. A clutch must be disengaged before the new gear is
selected, to disengage the running engine from the transmission, thus stopping all torque
transfer. This type of transmission is often referred to as a H-pattern because of the path that
the shift lever takes as it selects the various gears. In auto racing, this process is slow and
prone to human error; hence the development of the sequential transmission.
A true sequential transmission will very often use dog clutch engagement rather than the
more usual synchromesh as fitted to a normal H-pattern road car gearbox. Engagement using
dogs only requires a very brief interruption of engine torque to complete a shift into any
adjacent gear. This allows shifting between gears without the use of the clutch. The clutch
would normally be used only for standing starts. Existing art already also discloses two parts-
one is Plate Cam and other is press fitted 6 nos pin. However above disclosed art has the
following disadvantages:
Close tolerance holes and pins is quite difficult to manufacture in production and also
expensive. Due to inaccuracy in manufacturing pin becomes loose or missing which is
perennial problem to all the OEMs.
The above problem may be partially solved by another known art in as much as Pin will be
generated by cold extrusion process from the Plate Cam component itself through fine

blanking route. There will not be any assembly operation. Therefore no issue of pin loose or
missing.
In the art it is known to solve the problem by above solution which is partial in nature but
does not achieve the desired result.
The object of present invention to solve the above problem which is easier and cheaper to
operate.
According to present invention there is provided process for preparing study the component
drawing and functional requirement of each section of the part; also find out the reason of
existing design problem and how to eliminate problem
Study the component drawing and functional requirement of each section of the part. Also
find out the reason of existing design problem and how to eliminate problem.
Push out load depend upon interference tolerance limit and surface finish of both the parts.
If the factional force is high then push out load will be high. To achieve dimensional
accuracy better surface finish is required. So there is contradictory between dimensional
accuracy and frictional force.
From the above observation, we find out the solution that it can be eliminated if we generate
Lug (pin) from parent material where there will not be any assembly operation.
It is only possible by fine blanking considering accuracy requirement of cam profile.
We shall now describe the present invention with reference to drawings which are given
by way of illustrations but does not restrict the scope of the present invention:
According to present invention there is provided

Pin loose fitting or missing can be eliminated if we generate lug (pin) from parent
material where there will not be any assembly operation.
First we generate product drawing considering OEM's requirement and fine blanking
norms. Then we have the done the FE analysis on our product design and OEM's product.
FE analysis results are mentioned below:
breaking shear Strength of pin & lug.
> von-misses stress is reached Ultimate Strength (1375MPa) of the material in PIN (
Competitor ) but in the LUG (IFB), it is within Ultimate Strength (1375MPa) of the
material.
> the plastic strain (actual 8.4% & spec. 8.38%) in the Competitor's design is reached
for a load of 8.7KN and the strain level in IFB proposed design (7.38%) is lesser than
the Competitor's design (20.2%).
3. holding Strength of pin (882N) and Buckling Strength of lug.
> the lug displacement in IFB's "Single Part" - Plate Shift Drum Stopper found as
0.10mm for the applied Load of 10.0KN.
Our invention is better and easier to obtain the desired results by comparison as given
hereunder:

We shall now describe the present invention with reference to drawings and enclosed
diagrams which are given by way of illustrations but do not restrict the scope of
invention:
Figures 1 and 2 shows oem's part and present invention part respectively.
Figure 1 shows cam and plate cam

Figure 1 also provides Embodiments: Providing structural alternatives if any. That is, in
what ways could the parts (steps) be changed or equivalent parts substituted without
changing the basic invention?

Literature or prior arts: provides any related patent information and available literature related
to the invention, such as design documents, product specifications, web links, technical
papers, marketing brochures, etc.

WE CLAIM:
1. Process for preparing study the component drawing and functional requirement of
each section of the part; also find out the reason of existing design problem and how
to eliminate problem.
2. Process as claimed in claim 1 wherein push out load depend upon interference
tolerance limit and surface finish of both the parts.
3. Process as claimed in any of the claims 1 and 2 wherein if the frictional force is high
then push out load will be high and to achieve dimensional accuracy better surface
finish is required, so there is contradictory between dimensional accuracy and
frictional force.
4. Process as claimed in any of the claims 1 ,2 and 3 wherein the solution that it can be
eliminated if we generate Lug (pin) from parent material where there will not be any
assembly operation.
5. Process as claimed in any of the claims 1 ,2 ,3 and 4 wherein it is only possible by
fine blanking considering accuracy requirement of cam profile.

ABSTRACT

The present invention relates to the process for preparing study the component drawing
and functional requirement of each section of the part; also find out the reason of existing
design problem and how to eliminate problem, wherein push out load depend upon
interference tolerance limit and surface finish of both the parts, wherein if the frictional
force is high then push out load will be high and to achieve dimensional accuracy better
surface finish is required, so there is contradictory between dimensional accuracy and
frictional force.