Design Specification for a Portable Winch
SCHOOL OF ENGINEERING & PHYSICAL SCIENCES
Design and Manufacture 3
B59DE1
EXAMPLE PRODUCT DESIGN SPECIFICATION
Design Specification for a Portable Winch The following example PDS contains many aspects of a commercial PDS and was written with advice from a winch design company. A real design brief for a winch would contain many more aspects than outlined here. A PDS for family motor car for example, would have many more categories specific to the product and would require several large manuals to list the 'problem' in detail.
Portable Winch Design Brief From internal market research, it has been decided that IWC need to design a general purpose winch to sell to the cable and pipe laying market sector. The winch should be portable but have mounting points for the end user. It is important that the winch sits within our current range of 'Excel General Purpose winches'. Performance 1.1 Lift / lower a load of 2.5 tonnes (+/- 10%). 1.2 Draw in cable in at a rate of 0.2 m/s. 1.3 The winch drive should cut out when the load exceeds 10% of the specified load. 1.4 Drive to stop lowering load when only 1.5 metres of cable remains on winch drum. 1.5 Winch should operate with forward, reverse, stop and inch facility. 1.6 Any braking system employed, should produce a braking torque of 150% the full load torque. 1.7 Winch should have a manual device to control the brake release and load descent in the event of a power failure. 1.8 In the event of the winch 'overrunning', a manual safety relay/braking device should operate within 1 second or before the load exceeds a speed of 3m/s. 1.9 The product should be portable but with the option for permanent mounting.
1
I. Black 31 August 2009
1.10 The product must use a portable power source, preferably a diesel engine. 1.11 The weight of the product must be sufficient to aid the stability of the product. 1.12 Efficiency of the unit should be high, preferably in the area of 20 - 30%. 1.13 The drum should hold 50m of
Design and Manufacture 3
B59DE1
EXAMPLE PRODUCT DESIGN SPECIFICATION
Design Specification for a Portable Winch The following example PDS contains many aspects of a commercial PDS and was written with advice from a winch design company. A real design brief for a winch would contain many more aspects than outlined here. A PDS for family motor car for example, would have many more categories specific to the product and would require several large manuals to list the 'problem' in detail.
Portable Winch Design Brief From internal market research, it has been decided that IWC need to design a general purpose winch to sell to the cable and pipe laying market sector. The winch should be portable but have mounting points for the end user. It is important that the winch sits within our current range of 'Excel General Purpose winches'. Performance 1.1 Lift / lower a load of 2.5 tonnes (+/- 10%). 1.2 Draw in cable in at a rate of 0.2 m/s. 1.3 The winch drive should cut out when the load exceeds 10% of the specified load. 1.4 Drive to stop lowering load when only 1.5 metres of cable remains on winch drum. 1.5 Winch should operate with forward, reverse, stop and inch facility. 1.6 Any braking system employed, should produce a braking torque of 150% the full load torque. 1.7 Winch should have a manual device to control the brake release and load descent in the event of a power failure. 1.8 In the event of the winch 'overrunning', a manual safety relay/braking device should operate within 1 second or before the load exceeds a speed of 3m/s. 1.9 The product should be portable but with the option for permanent mounting.
1
I. Black 31 August 2009
1.10 The product must use a portable power source, preferably a diesel engine. 1.11 The weight of the product must be sufficient to aid the stability of the product. 1.12 Efficiency of the unit should be high, preferably in the area of 20 - 30%. 1.13 The drum should hold 50m of