The main secret in the manufacturing process of engineering machines begins with assembling, it is such a vital aspect of the industrial activity that has the tendency of rendering a huge loss of man-hour to the industry especially when parts were produced with wrong precision. Industrial assembling is a process of bringing already made parts together for the purpose of building a larger machine, equipment, tool, or engine, etc. with a specified function or functions.

This activity had been employed in the early centuries even before the emergence of industries, a good illustration of early industrial assembling was the making of broom for sweeping purpose from the sliced pieces of palm tree leaves mostly seen in Africa and still remain a practice that had been handed over from one generation to another in the making of local broom, meanwhile this practice started far back in the early centuries. In this 21st century, Assembling had taken a new dimension which has given rise to its complete dependent in manufacturing processes. Estimated figure, revealed that almost all the manufacturing industries undergo assembling process with the argument that the difference may just be a question of how the assembling was made, the method and techniques employed by the industries, etc.

However, the modern industrial practices had gone far in the method of assembling their products in the industrial production lines which most of them were highly sophisticated and carried out by means of industrial automation and robotic productions. A good attribute of quality industrial assembling has to do with precision and accuracy, this factor is very important due to their tendency of yielding a defective products after the assembling even though the parts were made of quality materials, the visible illustration of this can be seen in newly-assembled electric motor (induction motor) having a misaligned bearing on its shaft, in such a case malfunction of the motor is inevitable.

The major industry that had shown the various stages of progress that industrial assembling had gone is the automobile industries. History has it that, the early mechanized method of transportation was mobile carts and wheels driven by horses before the invention of internal combustion machines which gave a quick rise to the invention of automobiles such as cars and other related products. At that period the production of those products were completely made using manual assembling, even using some materials which may be considered inappropriate today was allowed, the policy of carbon monoxide emission was not invoked then, so the manufacturers had little to worry about in terms of clearance and precision, rather they focused more on the workability of their product such as automobiles. The various stages of industrial assembling exhibited so far by the automobile industries include:

MANUAL ASSEMBLING

The practice of manual assembling started the moment knowledge of technical practices was made known to make, it can be referred as the foundation of all the assembling process. A technique that thought the early scientist and engineers how to do things easily. Manual assembling has 100% human input in terms of its method of practice. The practice was made popular through its use in the production of every automobile and some industrial products.

THE DISADVANTAGES AND ADVANTAGES OF MANUAL ASSEMBLING

ADVANTAGES;

It is cheap and cost less to practice

It requires no special training to start doing it, most ancient engineers learned manual assembling by just looking at someone doing it for few times, some learned from books and by their own concept.

They can guarantee rigid structure due to the carefulness in human fixing techniques

It is easy to observe defective parts and make quick changes before completing the assembling

DIS-ADVANTAGES

It is time-consuming when compared with other methods

It makes industries to employ more labor force

It does not guarantee similar products in the production line

Lower production rate

SEMI-AUTOMATION ASSEMBLING

Semi-automatic assembling came into industrial production few years after the early method of manual production. It could be noted that the early manufacturers of automobiles experienced pressures from the high demand of automobile by their customers who are willing to pay for automobiles while they are still in the production line, for such reason they sort for a quicker way of increasing the production capacity by speeding up the manufacturing and assembling process. Therefore, the invention of machines to assist in the assembling process was developed, a good example of such machine is the industrial conveyors initially made with belts and pulleys for the quick transportation of manufactured parts to the assembling lines within the industry which reduced the time and manpower for that function and helped in increasing the production rate per day. Other machines invented were packaging machines, hot material handlers mostly found in foundry industries, etc. these machines were combined with human force in achieving a higher production rate.

ADVANTAGES AND DISADVANTAGES IN SEMI-AUTOMATION ASSEMBLING

ADVANTAGES;

They are quicker than manual assembling

They increase production output

There is reduction of labor force in terms of cost of employing workers

DISADVANTAGES;

The machines are may be costly to build and maintain

Cost of running the machine

Higher rate of possible accident in the use of the machines

The machines may need a good space to operate so manufacturer has to acquire more space

FULL AUTOMATION ASSEMBLING (ROBOTIC PRODUCTION)

Robotic production is the modern method of industrial assembling currently employed by over 80% of world’s technological products manufacturers such as manufacturers of automobiles, industrial machines, heavy duty equipment and other related products. The use of this method came following the need for higher precision and accuracy in manufacturing process which ordinary may be difficult for other methods to achieve, besides that; the need for even higher production rate and reduction of labor so as to reduce the cost of labor were all put into consideration in this robotic manufacturing process. The method involves the use of automated devices and tools and programming them in a sequential order for the purpose of performing a particular function.

It is simply called robotic because most industrial machines had been equipped with sophisticated programs that make it possible for them to perform various function on their own without being operated by anyone, and some of those programs were the same program installed in most robots and operates in public places like in road traffic, bank doors, human structure designed robots, etc.

ADVANTAGES AND DISADVANTAGES OF ROBOTIC ASSEMBLING

ADVANTAGES;

Easy production with very little human effort

Faster production rate that can meet most quantities of products demand in a short time

Higher precision and accuracy in manufactured products

Production of massive similar product is possible

DISADVANTAGE;

It is costlier than other methods due to the cost of acquiring such machines

The machines need a highly trained expert to manage them

The breakdown of any part of the machine could lead to total shutdown of the whole manufacturing and assembling process especially if the entire plant is programmed together

A single fault in the wrong command and data input in the programming of the machines or plant would lead to massive production of wrong similar products

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