TECHNICAL FIELD:
The present disclosure relates to a dual force sensing system for sensing and insertion of dowel in a case. More particularly the present disclosure relates to a provision for sensing the presence of dowel and insertion of dowel in the case using simple mechanism by applying force using the dual force difference sensing system.
BACKGROUND:
In general, vehicles comprise of a cylindrical lock which are used to lock the vehicle by means of a key. The cylindrical lock comprises of a cover which is used to protect the cylindrical lock from the environment and a case which act as a housing for different components of the cylindrical lock. During the process of mounting different components in the case, dowel pins are also required to be places in the cavity of the case. The process of insertion of insertion of dowel in the case are already known in the art however there has been no provision to check the presence of dowel in the existing mechanism. The person working in the assembly unit has to manually check whether the dowel is present in the existing mechanism. Also, since the size of dowel pins are very small, it requires a lot of time and energy to check the presence of dowel and insert the same in the given components. Also, in the existing mechanism if dowel is missing then it was not possible to detect presence of dowel before performing the operation. The various limitations of the existing mechanism are as follows:
(i) No provision for checking the presence of dowel in the mechanism
(ii) If dowel is missing, then there is no method to detect the presence of dowel
(iii) The process known in the art is not fully automatic
(iv) In the existing mechanism, it requires more time to insert the dowel in the case as the process is not continuous and there is halt in between the process due to absence of dowel.

Hence, there exists a strong need to provide an improved mechanism enabling automatic checking of the dowel pins, detecting the absence of dowel and then inserting the dowel pins in the case.
SUMMARY
The present disclosure relates to a dual force sensing system (1) for sensing and inserting a dowel (2) in a case (3) comprising a pneumatic cylinder (4) configured with a punch (5) wherein the punch (5) reciprocates in longitudinal direction parallel to the axis (X-X) of the system. A stack of dowels (2a) arranged in vertical direction perpendicular to the axis (X-X) of the system. A reed switch (6) located on the cylinder the case (3) having slot adapted to receive the dowel (2). A regulator (8) with a valve (9,10) is present to regulate the pressure of air inside the cylinder (4).
BRIEF DESCRIPTION OF FIGURES
The novel features and characteristics of the disclosure are set forth in the description. The disclosure itself, however, as well as a preferred mode of use, further objectives and advantages thereof, will best be understood by reference to the following description of an illustrative embodiment when read in conjunction with the accompanying drawings. One or more embodiments are now described, by way of example only, with reference to the accompanying drawings wherein like reference numerals represent like elements and in which:
Figure 1 illustrates the setup of the dual force sensing system when no operation is performed according to the embodiment of the present disclosure.
Figure 2 illustrates the front view of the dual force sensing system in accordance with the embodiment of the present disclosure.

Figure 3 illustrates the top view of the dual force sensing system in accordance with the embodiment of the present disclosure.
Figure 4 shows the enlarged view of the portioned marked in figure 3.
Figure 5 and 6 illustrates the setup of the dual force sensing system when no dowel is present according to the embodiment of the present disclosure. Figure 7- 9 shows the setup when dowel is present and due to the presence of the dowel the punch is not able to move to its final position in accordance with the embodiment of the present disclosure.
Figure 10-13 shows the final condition of the dual force sensing system in accordance with the embodiment of the present disclosure.
Figure 14 illustrates the assembly of the cylinder with the punch in accordance with the embodiment of the present disclosure.
Figure 15 illustrates the top view of the locator showing the slot wherein the case is positioned.
Figure 16 shows the locator with the case in which the case is positioned in the slot of the locator
DETAILED DESCRIPTION OF THE PRESENT DISCLOSURE
While the invention is subject to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the figures and will be described below. It should be understood, however that it is not intended to limit the invention to the particular forms disclosed, but on the contrary, the invention is to cover all modifications, equivalents, and alternative falling within the scope of the inventio

It is to be noted that a person skilled in the art can be motivated from the present invention and can perform various modifications. However, such modifications should be construed within the scope of the invention.
Accordingly, the drawings are showing only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.
The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that an assembly, setup, system, device that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such system or device or setup. In other words, one or more elements in the system or apparatus or device proceeded by "comprises a" does not, without more constraints, preclude the existence of other elements or additional elements in the assembly or system or apparatus. The following paragraphs explain present invention.
Accordingly, the present disclosure a dual force sensing system (1) for sensing and inserting a dowel (2) in a case (3) comprising a pneumatic cylinder (4) configured with a punch (5) wherein the punch (5) reciprocates in longitudinal direction parallel to the axis (X-X) of the system a stack of dowels (2a) arranged in vertical direction perpendicular to the axis (X-X) of the system; reed switch (6) located on the cylinder; the case (3) having slot adapted to receive the dowel (2); a regulator (8) with a valve (9,10) to regulate the pressure of air inside the cylinder (4).
In another embodiment of the present disclosure the reed switch comprises of front (6a) and rear reed switch (6b).
In yet another embodiment of the present disclosure the case (3) is positioned at the center of the system (1).

In a further embodiment of the present disclosure pair of cylinders (4) are connected with the regulator (8) and valves (9,10) to supply air at particular pressure.
In a further embodiment of the present disclosure a cylinder (11) is operated in longitudinal direction perpendicular to the axis (X-X) of the system (1) to clamp the case (3) in a locator (14).
In yet another embodiment of the present disclosure the case (3) is positioned in the slot of a locator (14).
In an alternate embodiment of the present disclosure a method of sensing and inserting dowel (2) in the case (3) using dual sensing system (1) comprising a sensing stroke and a power stroke wherein in the sensing stroke less pressure is applied on the punch (5) to move the punch (5) forward and senses the presence of the dowel (2); in the power stroke high pressure is applied on the punch (5) to move the punch forward and insert the dowel (2) in the case (3).
In another embodiment of the present disclosure the front (6a) and rear reed (6b) switch blinks to confirm movement of punch (5) in the system (1).
In one more embodiment of the present disclosure the method is having following steps checking the presence of dowel (2) by moving the punch (5) in the forward direction and indicating presence/absence of the dowel (2) by blinking reed switches ; supplying higher pressure air to the cylinder (4) when there is presence of dowel (2) inserting the dowel (2) in the slot of the case (3).
Figures 1-4 illustrates the setup of the dual force sensing system (1). The set up comprises a front (6a) and rear reed switch (6b), a punch (5), a case (3), a dowel (2), a pneumatic cylinder (4) and a pressure regulator (8). The front and reed switches (6a;6b) are some electrical switches operated by an applied magnetic field. The pneumatic cylinder is operated by air and the pressure inside the cylinder is controlled by pressure regulator and pressure
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Figure 1 illustrates the setup of the dual force sensing system when no operation is performed. The dual force sensing system comprising a pneumatic cylinder which is operated by the pressure regulator. The pneumatic cylinder is connected with the pressure regulator via pipes and pressure valves 1 and 2. The pneumatic cylinder is configured with a punch which moves longitudinally in the direction parallel to the axis (X-X) of the system. A stack of dowel pins is arranged in vertical direction perpendicular to the axis (X-X) of the system. A reed switch is also mounted on the cylinder which blinks to indicate different position of cylinder during the operation of the dual force sensing system. The reed switch comprises of front and rear reed switch which blinks to indicate the position and location of cylinder in the system. The blinking of front and rear reed switch helps the operator to monitor the working of the dual force sensing system. If case, if there is some problem with the dual force sensing system, then the pair of reed switch helps the operator to identify the problem. As shown in figure 1 the punch is placed at its position and the pneumatic cylinder is operated by inlet air front stroke. The reed switch comprises two lights one on the front side and other on the rear side.
Figure 2 illustrates the front view of the dual force sensing system in accordance with the embodiment of the present disclosure. As illustrated in figure 2, a cylinder is used to clamp the case in a locator. The cylinder which is used for clamping the case is pneumatically operated and moves in longitudinal direction perpendicular to the axis (X-X) of the system. The bottom end of the cylinder (11) holds the case and place the case in the slot present in the locator (14). Figure 15 illustrates the top view of the locator showing the slot wherein the case is positioned. Figure 16 shows the locator with the case in which the case is positioned in the slot of the locator. The case in having case cavity which is adapted to receive the dowel. The case is located at the center of the dual force sensing system.
Figure 3 illustrates the top view of the dual, force sensing system in accordance with the embodiment of the present disclosure. Figure 4 shows the enlarged view of the portioned marked in figure 3. Figure 4 shows the locator with the case positioned at
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the center of the dual force sensing system. Figure 4 also shows the dowel magazine having stack of dowel pins placed perpendicular to the axis X-X.
The following paragraph describe the operation of the dual force sensing system in
detail:
The operation is termed as dual stroke cycle as it takes place in two strokes i.e.
* Sensing stroke « Power stroke
In sensing stroke, air is supplied to the pneumatic cylinder which is having less pressure and regulated via pressure valve 1. The less pressure air is supplied to the pneumatic cylinder due to which the punch moves forward however the punch stops in halfway because the magnitude of power in the stroke is less than the power required to insert the dowel. In the sensing stroke the magnitude of force is not sufficient to insert dowel in the case due to which only the rear reed switch glows and the front read switch does not glow. The front reed switch does not glow because the punch stops halfway and not travelled till the stroke length. The stroke length of the punch is defined as the distance travelled by the piston in the cylinder from the top dead center to the bottom dead center. In the sensing stroke the front reed switch goes not glow due to incomplete stroke and it also ensures PLC that the dowels are present. Once the PLC ensures that both the dowels are present
Figure 5 and 6 illustrates the setup of the dual force sensing system when no dowel is present according to the embodiment of the present disclosure. Due to absence of dowel pins in the system, when the air is supplied to the cylinder, the punch travels its entire stroke length i.e. from the bottom dead center to the top dead center to its end position by the air supplied from pressure valve 1. The front switch has detected the position of the punch within the time interval which is set in the timer. The front reed switch blinks which shows the absence of dowel in the setup and the rear reed switch stop blinking. This indicates to the operator that the dowel is not present in the setup.
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The second stroke is a power stroke in which the higher-pressure air is supplied to the pneumatic cylinder. Both the pressure valves are operated and the magnitude of the force which is applied to the punch is sufficient to insert the dowel pins in the slot present in the case. In the power stroke, the punch strikes the dowel with full force and inserts the dowel pin in the case.
Figure 7- 9 shows the setup when dowel is present and due to the presence of the dowel the punch is not able to move to its final position. In this condition, the reed switches are not able to detect the position of the punch as the punch is not able to push the dowel due to lower pressure. In this step the timer has been set and if the any of the reed switch i.e. front and rear does not light up within specific time which is set up in the timer, then the punch comes back to its initial position (as illustrated in figure 1). The air is supplied to pneumatic cylinder from valve 2 and due to increased amount of air the punch strikes the dowel with full pressure thereby inserting the dowel inside the case as illustrated in figure 11.
Figure 10 illustrates the position of the dual force sensing system showing the insertion of the dowel pin in the case. The reed switch confirms that the punch has pushed the dowel pin in case or punch has travelled to its last position. Figure 11-13 illustrates the final condition of the dual force sensing system in which the dowel pin in inserted in the case.
Thus, as described in the above paragraph in the dual force sensing system, the system first checks the presence of the dowel pins in the setup. In case the dowel pins are not present, the reed switch blinks and thus indicates to the operator that the dowel pins are not present. If the dowel pins are present, then the system indicates the presence of dowel pins and operation continues. In the sensing stroke, the amount of air supplied to the cylinder is less and the pressure of the air is also less. The stroke is called as sensing stroke because it checks the presence of dowel. Once the system locates the presence of dowel then higher amount of air is supplied to the cylinder having higher pressure so to insert the dowel pins in the case.
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Equivalents:
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
Throughout this specification the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
The use of the expression "at least" or "at least one" suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.

Any discussion of documents, acts, materials, devices, articles and the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form a part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application.
The numerical values mentioned for the various physical parameters, dimensions or quantities are only approximations and it is envisaged that the values higher/lower than the numerical values assigned to the parameters, dimensions or quantities fall within the scope of the disclosure, unless there is a statement in the specification specific to the contrary.
While considerable emphasis has been placed herein on the particular features of this disclosure, it will be appreciated that various modifications can be made, and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other modifications in the nature of the disclosure or the preferred embodiments will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation.

LIST OF REFERNCE NUMERALS

We Claim:
1. A dual force sensing system (1) for sensing and inserting a dowel (2) in a case
(3) comprising:
a pneumatic cylinder (4) configured with a punch (5) wherein the punch (5) reciprocates in longitudinal direction parallel to the axis (X-X) of the system;
a stack of dowels (2a) arranged in vertical direction perpendicular to the axis (X-X) of the system;
reed switch (6) located on the cylinder;
the case (3) having slot adapted to receive the dowel (2);
a regulator (8) with a valve (9,10) to regulate the pressure of air inside the cylinder (4).
2. The dual force sensing system (1) as claimed in claim 1 wherein the reed switch comprises of front (6a) and rear reed switch (6b).
3. The dual force sensing system (1) as claimed in claim 1 wherein the case (3) is positioned at the center of the system (1).
4. The dual force sensing system (1) as claimed in claim 1 wherein pair of cylinders
(4) are connected with the regulator (8) and valves (9,10) to supply air at particular
pressure.
5. The dual force sensing system (1) as claimed in claim 1 wherein a cylinder (11) is operated in longitudinal direction perpendicular to the axis (X-X) of the system (1) to clamp the case (3) in a locator (14).
6. The dual force sensing system as claimed in claim 1 wherein the case (3) is positioned in the slot of a locator (14).

7. A method of sensing and inserting dowel (2) in the case (3) using dual sensing
system (1) as claimed in claim 1 comprising:
- a sensing stroke and
- a power stroke
wherein in the sensing stroke less pressure is applied on the punch (5) to move the punch (5) forward and senses the presence of the dowel (2);
in the power stroke high pressure is applied on the punch (5) to move the punch forward and insert the dowel (2) in the case (3).
8. The method as claimed in claim 5 wherein the front (6a) and rear reed (6b) switch
blinks to confirm movement of punch (5) in the system (1).
9. The method as claimed in claim 5 having following steps:
- checking the presence of dowel (2) by moving the punch (5) in the forward direction and indicating presence/absence of the dowel (2) by blinking reed switches
- supplying higher pressure air to the cylinder (4) when there is presence of dowel (2)
- inserting the dowel (2) in the slot of the case (3).