FORM 2
THE PATENT ACT, 1979
(39 OF 1970)
&
THE PATENTS RULE, 2003
COMPLETE SPECIFICATION
(SEE SECTION 10; RULE 13)
"METHOD OF BUTTING OF COMPONENT FOR SEATING CONFIRMATION
ON ENGINE BLOCK LINE"
MAHINDRA & MAHINDRA LIMITED A COMPANY REGISTERED UNDER THE PROVISIONS OF COMPANIES ACT, 1956 HAVING ADDRESS AT R & D CENTER, AUTOMOTIVE SECTOR, 89, M.I.D.C, SATPUR, NASHIK - 422 007, MAHARASHTRA, INDIA
THE FOLLOWING SPECIFICATION DESCRIBES THE NATURE OF THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED

FIELD OF THE INVENTION:
The present invention is related to manufacturing method. More particularly, the present invention is related to method of butting of component for seating confirmation on engine block line in the manufacturing of engine.
BACKGROUND OF THE PRESENT INVENTION:
Conventionally, the butting of the component on engine block line is done by pneumatic type machines/devices. But due to variation in pneumatic pressure there is frequent failure and sometimes frequent setting is required for pneumatic seat check. In pneumatic seat check there is continuous loss of compressed air and cost involved in the butting operation. Further, in pneumatic type seat check if pipe line gets choke up then also it shows setting confirmation.
Therefore, the present method of butting the component by using electrical continuity is developed and described below. This concept does not generate error that generally happens in pneumatic systems.
OBJECTIVES OF THE PRESENT INVENTION:
The main object of the present invention is to provide the method of butting the component on the engine assembly line.
Another object of the present invention is to provide the method of butting the component on engine assembly line using the electrical continuity.
Another object of the present invention is to provide an error free method of butting the component on engine assembly line.
Another object of the present invention is to provide the method of butting the component on engine assembly line that eliminates the re-work and saves the cost of rework and rejection.

Another object of the present invention is to provide the method of butting the component on engine assembly line that reduces the breakdown time and eliminates the line stoppages.
DETAILED DESCRIPTION OF THE FIGURES:
Figure 1 shows the layout of the engine block assembly line generally followed in engine manufacturing plants.
Figure 2 shows the actual set-up for seating confirmation on engine block assembly line in open circuit condition where there is no contact of component with the resting pads.
Figure 3(a) shows the fixture unit with resting pads on the engine block assembly line that ensures the seating confirmation of the engine block.
Figure 3(b) shows the grading unit on the engine block assembly line wherein the engine block is confirmed for its seating by the fixture shown in Fig. 3(a)
Figure 3(c) shows the exploded view of the resting pads of the fixture in accordance with the present invention.
Figure 4 shows the actual set-up for seating confirmation on engine block assembly line in closed circuit condition where component is in contact with the resting pads.
Figure 5 shows the sequential cycle logic with confirmation interlock in accordance with the present invention.
DETAILED DESCRIPTION OF THE PRESENT INVENTION:
On the engine block assembly line, after machining, crank bore grading is done. This bore grading-is generally done on PARI (Precision Automation & Robotics

India) Gauging station installed on the line. On grading station component gets located through dowel pin and seated on rest pads after that grading unit come forward for Grading/marking application on component.
Grading is nothing but punching operation than can be done on cylinder block for proper identification of crank bore bearing shell. Further proper selection of bearing shell will enhance the engine life.
There was chronic concern during grading on cylinder block in block line, grading position used to get shifted on cylinder block because the component was not seating properly on the grading station and there was no provision and confirmation for proper seating of component for the grading operation. Therefore, due to non-confirmation of the seating of the component, wrong grading used to get marked on block and also the marking pin used to get damaged because of improper component position.
In case of the wrong grading of the components, this used to lead to rework and the rework of components used to be needed.
To avoid rejection of component, proper confirmation for resting of component on rest pad is needed. Therefore, an electrical contact (Continuity) type seat check mechanism for getting proper confirmation was developed. Referring to Figures 3(a), 3(b) and 3(c), the set up for butting of the component for seating confirmation comprises of a fixture, dowel pins, resting pads, grading unit. The resting pads are provided with the segments that are provided with proper insulation.
To avoid the concern shell type insulated electrically continuity base resting pad is developed and the same is fitted on the fixture. The grading cycle sequence logic modified along with all safety interlocks. Therefore, there is no chance to produce wrong grading components, if component does not seat properly on rest pad then the machine will generate alarm and stop the grading unit.
The advantages achieved by this development are as under:

- Elimination of re-work cost and the rejection cost.
- Very Low cost mechanism.
- Quality concern of grading shifted due to improper resting is eliminated
- Damage of marking pin & its replacement time & cost (Rs 18000 / pin) is eliminated.
- Drastic reduction in breakdown time.
- In-house developed and simple in design and it is first time used in manufacturing process.
- Line stoppages/Irritants eliminated.
- Easy fault finding
- No frequent failure as compared with conventional seat check.
- It leads to the increase in productivity.
- Safely operated at low voltage (i.e. 24V), and OV used at work station.

1. Set-up for butting of component for seating confirmation on engine block line comprises of a seating fixture, dowel pins, resting pads, an electrical contact (Continuity) type seat check mechanism, a processor with modified grading cycle sequence, and grading unit, wherein the seating fixture is provided for accommodating the engine block, the dowel pins are provided on the fixture for locking the engine, the resting pads are attached to the fixture for confirming the seating of engine block, the processor is provided to trigger the grading unit for grading operation and is configured to follow the different grading sequence.
2. Set-up for butting of component for seating confirmation on engine block as claimed in claim 1, wherein the resting pads are provided with the segments thereon and both the segments and resting pads are provided with proper insulation.
3. Set-up for butting of component for seating confirmation on engine block as claimed in claim 1, wherein the processor with modified grading cycle sequence is provided with safety interlocks.
4. Method of butting of components for seating confirmation on engine block line follows the steps in a sequential manner as putting the engine block on the fixture, followed by locking the engine block on the fixture with dowel pins, followed seating confirmation of the engine block by the resting padsthrough an electrical contact (Continuity) type seat check mechanism, followed by grading operation provided the set-up imparts seating confirmation of the engine block.