Remote controlled material handling equipment (RCMHE)

Prior to the introduction of the so called “Material handling equipment” humans had to perform physical labor to carry out heavy duty tasks. This could be made possible by employing a huge number of workers. However, when the goods came in bulk unloading and loading turned out to be a very time consuming affair. The use of Material handling equipment in logistics has played a significant role in making the loading and unloading activities easier and faster.

Ask yourself the question “Why are ‘Remote controlled’ material handling equipment used?” and almost instantly you arrive at the logical answer that the chief benefit would be allowing personal to control their machine from a safe distance.

Remote control can be achieved by two different modes:

1)     Radio frequency (RF) Signals

RF signals are further divided into two categories.

a)     Narrow-band system  b)  Spread spectrum system.

2)     Infrared light

Infrared method works by transmitting a beam of light

Infrared mode of radio control is preferred over RF signals because of the safety and precision that it offers. Since the infrared method works by transmitting a beam of light, once the beam is out of sight, the beam is obstructed and the controls turn off.  That is, the operator must always be in view of the RCMHE, which in turns aids safety as the full visibility of the operator over the machine is critical. Precise, in the sense that with the use of RF technology there is always a chance of interference with other signals and might lead to accidents, Infrared remote control makes this type of mistake impossible.

Applications:

1)      Transfer of components from one container to another especially fragile objects

2)      Transfer of  hazardous/explosive objects

3)      Operation in high temperature environment

 

Although it is advantages to use RCMHE, proper training for the staff handling the RCMHE is a prerequisite to ensure safe working.

Latest Interview Questions & Answers

1. What is Auto Dosing?

Auto dosing is an automated system of feeding the equipment with liquid products. It is the ideal way to ensure the correct calibrated dose at the right time every time in auto.

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2. Difference between Codes, Standards and Specifications?

• Code is procedure of acceptance and rejection criteria.
• Standard is accepted values and compare other with it.
• Specification is describing properties of any type of materials.

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3.  Difference between Strainer and Filter

Strainer for coarse size, Filter is more accurate than Strainer.

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4. What are differences between Welding & Brazing?

In Welding concentrated heat (high temperature) is applied at the joint of metal and fuse together.

In Brazing involves significantly lower temperatures and does not entail the melting of base metals. Instead, a filler metal is melted and forced to flow into the joint through capillary action.

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5. What does a pump develops? Flow or Pressure

A pump does not create pressure, it only creates flow. Pressure is a measurement of the resistance to flow.

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6. Which is heavier 1kg of Iron or 1kg of Cotton? and why?

Both of them have same weight. The only difference is the volume of Iron is small compared to Cotton.

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7. What will be the position of Piston Ring?

In 180 degree angle the Top ring, Second ring and Oil ring are fixed. Position the ring approximately 1 inch gap below the neck.

SINTERING

The operation of heating the green compact at high temperature in a controlled atmosphere (Reducing atmosphere which protects oxidation of metal powders). The Sintering increases the bond between the particles and therefore strengthens a powder metal compact. Sintering temperature and time of sintering depends on the type of powders and the strength required in a final product. The Sintering temperatures usually 0.6 to 0.8 times the melting point of powders.

Type of powder                                   Sintering Temperature                 Time

Aluminium & Alloys                                   370 – 520 C                                  24 hrs

Copper, Brass, Bronze                                700 – 900 C                                  30 Mins

Iron                                                           1025 – 1200 C                              30 Mins

Stainless Steel                                           1180 C                                       20 – 40 Mins

Tungsten Carbide                                      1480 C                                      20 – 40 Mins

Spark Sintering:

The process of simultaneous pressing & Sintering of metal powders by high energy electric spark. This spark is discharged from capacitor bank & removes the surface contaminants from powder particles. This cause the particles to form a solid cohesive mass. Immediately after spark, the current is continued for about 10 Seconds, with high temperature which further strengthens the bond used for sintering Aluminium, Copper, Iron and Stainless Steel.

 

 

SINTERING

The operation of heating the green compact at high temperature in a controlled atmosphere (Reducing atmosphere which protects oxidation of metal powders). The Sintering increases the bond between the particles and therefore strengthens a powder metal compact. Sintering temperature and time of sintering depends on the type of powders and the strength required in a final product. The Sintering temperatures usually 0.6 to 0.8 times the melting point of powders.

Type of powder                                   Sintering Temperature                 Time

Aluminium & Alloys                                   370 – 520 C                                  24 hrs

Copper, Brass, Bronze                                700 – 900 C                                  30 Mins

Iron                                                           1025 – 1200 C                              30 Mins

Stainless Steel                                           1180 C                                       20 – 40 Mins

Tungsten Carbide                                      1480 C                                      20 – 40 Mins

Spark Sintering:

The process of simultaneous pressing & Sintering of metal powders by high energy electric spark. This spark is discharged from capacitor bank & removes the surface contaminants from powder particles. This cause the particles to form a solid cohesive mass. Immediately after spark, the current is continued for about 10 Seconds, with high temperature which further strengthens the bond used for sintering Aluminium, Copper, Iron and Stainless Steel.