This invention relates to a novel inline cam in dies.
BACKGROUND OF THE INVENTION
Where ever straight vertical operations are not possible in press dies, CAMS are
required to be used. Cams are used in trim, piercing and bending dies. Cams
are used to convert vertical movement of press in to angular or horizontal
movement of die parts. Therefore, cams are used for the operations which are
not possible in vertical motion of the press. Following are the two types of cams
known to have been provided in the art:
A) Aria1 Cam- The drives of this type of cam are mounted in the lower die
and slider are placed in the upper die.
B) Horizontal Cam- The sliders of this type of cams are placed in the lower
die and drivers are mounted on the upper die.
The normal inclined cam has its driving surfaces at the back of slider cam
body. The drawback of this cam is that when it is located near the feed bar of
the transfer press (with its line of action transverse to the feed direction), its
driver has most likely chances of interfering with the return path of the
transfer fingers (shovels). Because of this cam, the selection of press is tough,
which also causes increase in the die size. In the conventional designs the
drivers are placed just behind the working surface which results in the
increase in the die size. Usually, in these types of designs the cam unit and its
casting overhangs from the die structure and as a result die structure strength
reduces.
Disadvantages of Existing Cam
1. Uses of existing type cam increases the die size.
2. More chances of interference for fingers/More shovels of the transfer
press line.
3. Cam travelling axis/time action is in the transverse to feed direction,
used for press die operation like trim, piercing, restricting and bending.
4. Cannot be used in smaller tonnage m/c.
5. Lower strokes per minute.
To overcome the above disadvantages, a new cam is required to be developed
with its driving surfaces strategically placed in line with the slider cam body.
OBJECTS OF THE INVENTION
I The primary object of the present invention is to provide a novel inline cam in
dies which overcomes disadvantages associated with the prior art.
I
I Another object of the present invention is to provide a novel inline cam in dies
which is simple in construction.
Still another object of the present invention is to provide a novel inline cam in
dies which is efficient and compact.
STATEMENT OF INVENTION
According to this invention, there is provided a novel inline cam in dies
comprising of driver mounted on upper die and slider slides lower die recess
wherein driving surfaces are placed in line with the slider cam body and cam
slider guide rail and positive return are mounted on the slider.
I BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Further objects and advantages of this invention will be more apparent from
the ensuing description when read in conjunction with the accompanying
drawings and wherein:
Fig land 2 shows: novel inline cam of the present invention.
DETAIL DESCRIPTION OF THE INVENTION WITH REFERENCE TO THE
ACCOMPANYING DRAWINGS:
The invention of the proposed application is directed to a novel inline cam in
dies.
The horizontal cam is introduced with provision like angular motion and
compact size, wherein the inclined cam has driver mounted on the upper die
and slider moves in the lower die. The driving surfaces can be positioned at the
I
1 two extreme cam ends i.e. outside the cam body or in between the cam body
according to the operation requirement.
1 Now, reference may be made to fig. 1 and 2. The novel inline cam of the instant
invention comprising of driver (1) mounted on upper die and slider (4), which
i slides on the lower die recess.
When the driver (1) touches the slider (4), the slider (4) moves in the horizontal
direction till it stops through the stopper (1 1). This position of the slider is at
the bottom dead centre (BDC) of the press in which die is in the fully closed
condition. Cam slider guide rail (7) is mounted on the slider and guided by the
recess in the lower die. When the die opens up, the positive return (5) mounted
on the slider pushes the retainer 2 (mounted on driver) and as a result cam
slider disengages from the driver.
;
I 1 When plates (3 & 12) are mounted on the driver. These wear plates have the
lubricating properties which helps the driver and slider to move with lesser
friction.
The wear plates on the driver slide to the sliding surface of the slider (1 3).
Lifting holes (6, 8) are also provided on the slider for proper lifting.
Advantages of Proposed Novel Inline Cam
1. Reduced die size transverse to feed direction.
2. No interference of drivers with the return curves of transfer press, as they
are placed inline with the cam body.
3. Since the use of this cam results in reduced die size, the die can run on
lower tonnage transfer presses with lower feed bar width. Thus, high press
strokes per minute (S.P.M) can be achieved resulting in reduced
production cost per component.
4. Reduced driver size & hence the weight e.g. if the driving surface are
placed at the extreme ends of the cam, two independent drivers can be
i
used in the die without making the driver body equal to & running along
the full length of slider cam.
i 5. Mounting of separate bending/trimming cam inserts, which is beneficial
for die maintenance.
6. Cam can be used in all types of presses like Transfer, tendem and cross
bar type of presses.
It is to be noted that the present invention is susceptible to modifications,
adaptations and changes by those skilled in the art. Such variant embodiments
employing the concepts and features of this invention are intended to be within
the scope of the present invention, which is further set forth under the
following claims: -

We Claims
1 1. A novel inline cam in dies comprising of driver mounted on upper die and
slider slides on lower die recess, wherein driving surfaces are placed in
line with the slider cam body, and cam slider guide rail and positive
return are mounted on the slider.
2. A novel inline cam in dies as claimed in claim 1, wherein said cam slider
I guide rail is guided by the recess in the lower die.
3. A novel inline cam in dies as claimed in claim 1 or 2, wherein the driver
is mounted with a retainer and a plurality of wear plates.
4. A novel inline cam in dies as claimed in any of the preceding claims,
wherein said slider is provided with a plurality of lifting holes for lifting.
5. A novel inline cam in dies as claimed in any of the preceding claims,
wherein said wear plates mounted on the driver have lubricating
properties and slide to the sliding surface of the slider.
6. A novel inline cam in dies substantially as herein described with
reference to the accompanying drawings.
Dated this 8" day of June, A 2012
(SOMA RANI MI p HRA)
OF L.S.DAVAR & CO.,
APPLICANT'S AGENT
11 JUN 2012
ABSTRACT
"A novel inline cam in dies"
This invention relates to a novel inline cam in dies comprising of driver
mounted on upper die and slider slides on lower die recess, wherein driving
surfaces are placed in line with the slider cam body and cam slider guide rail
and positive return are mounted on the slider.
THE PATENTS ~ ~ ~ 7 1 9 7 0
11 JUN 2012
COMPLETE
SPECIFICATION
SECTION 10
TITLE
"A novel inline cam in diesn.
APPLICANT
MARUTI SUZUKI INDIA LIMITED, A COMPANY REGISTERED UNDER THE
COMPANIES ACT, 1956, HAVING ITS REGISTERED OFFICE AT 1, NELSON
MANDELA ROAD, VASANT KUNJ, NEW DELHI-110070, INDIA.
The following specification particularly describes the invention and the
manner in which it is to be performed.
1 FIELD OF INVENTION
This invention relates to a novel inline cam in dies.
BACKGROUND OF THE INVENTION
Where ever straight vertical operations are not possible in press dies, CAMS are
required to be used. Cams are used in trim, piercing and bending dies. Cams
are used to convert vertical movement of press in to angular or horizontal
I movement of die parts. Therefore, cams are used for the operations which are
not possible in vertical motion of the press. Following are the two types of cams
known to have been provided in the art:
A) Aria1 Cam- The drives of this type of cam are mounted in the lower die
and slider are placed in the upper die.
B) Horizontal Cam- The sliders of this type of cams are placed in the lower
die and drivers are mounted on the upper die.
The normal inclined cam has its driving surfaces at the back of slider cam
I body. The drawback of this cam is that when it is located near the feed bar of
the transfer press (with its line of action transverse to the feed direction), its
driver has most likely chances of interfering with the return path of the
transfer fingers (shovels). Because of this cam, the selection of press is tough,
which also causes increase in the die size. In the conventional designs the
drivers are placed just behind the working surface which results in the
increase in the die size. Usually, in these types of designs the cam unit and its
casting overhangs from the die structure and as a result die structure strength
reduces.
Disadvantages of Existing Cam
1. Uses of existing type cam increases the die size.
2. More chances of interference for fingers/More shovels of the transfer
press line.
1 3. Cam travelling axis/time action is in the transverse to feed direction,
used for press die operation like trim, piercing, restricting and bending.
4. Cannot be used in smaller tonnage m/c.
5. Lower strokes per minute.
To overcome the above disadvantages, a new cam is required to be developed
with its driving surfaces strategically placed in line with the slider cam body.
OBJECTS OF THE INVENTION
I The primary object of the present invention is to provide a novel inline cam in
dies which overcomes disadvantages associated with the prior art.
Another object of the present invention is to provide a novel inline cam in dies
which is simple in construction.
Still another object of the present invention is to provide a novel inline cam in
dies which is efficient and compact.
SVATEMENT OF INVENTION
According to this invention, there is provided a novel inline cam in dies
comprising of driver mounted on upper die and slider slides lower die recess
wherein driving surfaces are placed in line with the slider cam body and cam
slider guide rail and positive return are mounted on the slider.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Further objects and advantages of this invention will be more apparent from
the ensuing description when read in conjunction with the accompanying
drawings and wherein:
1 Fig land 2 shows: novel inline cam of the present invention.
DETAIL DESCRIPTION OF THE INVENTION WITH REFERENCE TO THE
ACCOMPANYING DRAWINGS:
The invention of the proposed application is directed to a novel inline cam in
dies.
The horizontal cam is introduced with provision like angular motion and
compact size, wherein the inclined cam has driver mounted on the upper die
an# slider moves in the lower die. The driving surfaces can be positioned at the
I two extreme cam ends i.e. outside the cam body or in between the cam body
according to the operation requirement.
i Now, reference may be made to fig. 1 and 2. The novel inline cam of the instant
invention comprising of driver (1) mounted on upper die and slider (4), which
slides on the lower die recess.
When the driver (1) touches the slider (4), the slider (4) moves in the horizontal
direction till it stops through the stopper (1 1). This position of the slider is at
the bottom dead centre (BDC) of the press in which die is in the fully closed
1 . condition. Cam slider guide rail (7) is mounted on the slider and guided by the
recess in the lower die. When the die opens up, the positive return (5) mounted
on the slider pushes the retainer 2 (mounted on driver) and as a result cam
slider disengages from the driver.
When plates (3 & 12) are mounted on the driver. These wear plates have the
lubricating properties which helps the driver and slider to move with lesser
friction.
The wear plates on the driver slide to the sliding surface of the slider (13).
1 Lifting holes (6, 8) are also provided on the slider for proper lifting.
Advantages of Proposed Novel Inline Cam
1. Reduced die size transverse to feed direction.
2. No interference of drivers with the return curves of transfer press, as they
are placed inline with the cam body.
3. Since the use of this cam results in reduced die size, the die can run on
lower tonnage transfer presses with lower feed bar width. Thus, high press
strokes per minute (S.P.M) can be achieved resulting in reduced
production cost per component.
4. Reduced driver size & hence the weight e.g. if the driving surface are
placed at the extreme ends of the cam, two independent drivers can be
used in the die without making the driver body equal to & running along
the full length of slider cam.
5. Mounting of separate bendingltrimming cam inserts, which is beneficial
for die maintenance.
6. Cam can be used in all types of presses like Transfer, tendem and cross
bar type of presses.
I
It is to be noted that the present invention is susceptible to modifications,
adaptations and changes by those skilled in the art. Such variant embodiments
employing the concepts and features of this invention are intended to be within
I the scope of the present invention, which is further set forth under the
following claims:-

1. A novel inline cam in dies comprising of driver mounted on upper die and
slider slides on lower die recess, wherein driving surfaces are placed in
line with the slider cam body, and cam slider guide rail and positiye
return are mounted on the slider.
2. A novel inline cam in dies as claimed in claim 1, wherein said cam slider
guide rail is guided by the recess in the lower die.
- 3. A novel inline cam in dies as claimed in claim 1 or 2, wherein the driver
is mounted with a retainer and a plurality of wear plates.
4. A novel inline cam in dies as claimed in any of the preceding claims,
wherein said slider is provided with a plurality of lifting holes for lifting.
5. A novel inline cam in dies as claimed in any of the preceding claims,
wherein said wear plates mounted on the driver have lubricating
properties and slide to the sliding surface of the slider.
6. A novel inline cam in dies substantially as herein described with
reference to the accompanying drawings.
Dated this 8th day of June, 4 . 2012
b (SOMA RANI MISHRA)
OF L.S.DAVAR & CO.,
APPLICANT'S AGENT ,