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BTEC First Engineering Unit 1: The Engineered World Learning aim A Know about engineering processes used to produce modern engineered products BTEC First.

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Presentation on theme: "BTEC First Engineering Unit 1: The Engineered World Learning aim A Know about engineering processes used to produce modern engineered products BTEC First."— Presentation transcript:

1 BTEC First Engineering Unit 1: The Engineered World Learning aim A Know about engineering processes used to produce modern engineered products BTEC First Engineering

2 Unit 1: The Engineered World Surface mount Surface-mount technology (SMT) is a method for producing electronic circuits in which the components are mounted or placed directly onto the surface of printed circuit boards (PCBs). An electronic device so made is called a surface- mount device (SMD). In the industry it has largely replaced the through-hole technology construction method of fitting components with wire leads into holes in the circuit board. Both technologies can be used on the same board for components not suited to surface mounting such as large transformers and heat-sinked power semiconductors.

3 BTEC First Engineering Unit 1: The Engineered World Printed circuit board Electronic circuits in schools and industry are normally manufactured through the use of PCBs (Printed Circuit Boards). The boards are made from glass reinforced plastic with copper tracks in the place of wires Components are fixed in position by drilling holes through the board, locating the components and then soldering them in place. The copper tracks link the components together forming a circuit.

4 BTEC First Engineering Unit 1: The Engineered World Process of manufacturing a PCB and SMT Printed circuit board (PCB) manufacture The Surface Mount Technology (SMT) process

5 BTEC First Engineering Unit 1: The Engineered World Process of manufacturing a PCB and SMT Printed circuit board (PCB) manufacture Designing the layout Producing the artwork PCB etching Drilling the board Populating the board and soldering The Surface Mount Technology (SMT) process Apply solder paste to copper pads Place components using pick and place robot Conveyor belts are used to transport the boards to the reflow soldering oven The board is heated to a temperature that melts the solder plate Components are soldered to the surface of the board The finished board is then inspected for imperfections

6 BTEC First Engineering Unit 1: The Engineered World © Pearson Education Ltd Copying permitted for purchasing institution only. 4 Scales of production One-offBatch Mass Continuous BTEC First Engineering

7 Unit 1: The Engineered World © Pearson Education Ltd Copying permitted for purchasing institution only. One off Batch Mass Continuous

8 BTEC First Engineering Unit 1: The Engineered World © Pearson Education Ltd Copying permitted for purchasing institution only. Scales of production One-off Where just one product is made for a customer. Could be a prototype. Batch A set number of identical products. Some flexibility to individualise designs. Mass Products produced in large quantities. Often involves automation. Continuous Automated production can continue for months. Often produces low-cost products. BTEC First Engineering

9 Unit 1: The Engineered World Characteristics of different scales of production © Pearson Education Ltd Copying permitted for purchasing institution only. ONE OFFBATCHMASS CONTINUOUS Unit CostHigh MediumLow Tools & equipment General Specialised Specialised and dedicated Initial investmentsLow MediumHigh Production efficiency Low Medium/highHigh Very high Labour typeSkilled Skilled/semi skilled Semi- skilled/unskilled Unskilled Labour costsHighMediumLow


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