Marking out marine sheet metalwork
Overview
This standard identifies the competences you need to mark out sheet materials (including simple templates) and sections used in marine sheetmetal work activities, using templates and basic tools, in accordance with approved procedures. You will be required to select the required materials to use and the appropriate marking out tools and equipment, based on the information presented to you and the accuracy to be achieved. Marking out will be the preparation required for cutting, shaping and forming sheet materials and sections, as appropriate to the application. This will include marking out workpiece datums, centre lines and cutting details, including hole centring and outlining details.
Items to be marked out may include ferrous and non-ferrous materials. Certain materials will require you to take the grain flow into account to avoid later production process problems.
Your responsibilities will require you to comply with organisational policy and procedures for the marking out activities undertaken and to report any problems with the materials, equipment or marking out activities that you cannot resolve yourself, or are outside your permitted authority, to the relevant people. You will be expected to work to instructions, with a minimum of supervision, taking personal responsibility for your own actions and for the quality and accuracy of the work that you carry out.
Your underpinning knowledge will be sufficient to provide a sound basis for your work and will provide an informed approach to applying marking out procedures for marine sheet metalwork activities. You will have an understanding of the marking out process and its application and will know about the materials as well as the care and use of tools, in adequate depth to provide a sound basis for carrying out the activities to the required specification.
You will understand the safety procedures required when using marking mediums and when carrying out the marking out activities. You will be required to demonstrate safe working practices throughout and will understand the responsibilities you owe to yourself and others in the workplace.
Performance criteria
You must be able to:
- work safely at all times, complying with health and safety and other relevant regulations, directives and guidelines
- obtain and use the correct information for marking out
- obtain the appropriate marking out equipment and check that it is in a usable condition
- prepare suitable datum's and marking out surfaces
- produce marked out components using appropriate methods
- check that the marking out complies with the specification
- deal promptly and effectively with problems within your control and report those that cannot be resolved
Knowledge and Understanding
You need to know and understand:
- the specific safety precautions to be taken when marking out for the manufacture of marine sheet metal components and assemblies and with the tools and equipment that are used (including any specific statutory requirements, risk assessment procedures and relevant requirements of HASAWA, COSHH and Work Equipment Regulations)
- the personal protective clothing and equipment (PPE) to be worn when carrying out the marking out activities (such as leather gloves, eye/ear protection, safety helmets)
- the correct methods of moving or lifting sheet and section materials
- the hazards associated with marking out sheet metal components (such as working in a marine fabrication environment, lifting and handling sheet/fabricated components, slivers/burrs on sheet materials, using marking out mediums, using laser marking out equipment) and how they can be minimised
- the procedures to obtain the necessary job instructions, drawings and specifications
- how to interpret information from engineering drawings and related specifications, in relation to work undertaken
- how to use imperial and metric systems of measurement, workpiece reference points and system of tolerancing
- the preparations to be carried out on the material prior to marking out, to enhance clarity, accuracy and safety
principles of marking out, developing basic shapes (flat, rectangular and cylindrical) from flat sheet, plate or rolled section materials
the effective use and care of tools/instruments
- use of marking out conventions, datum edges/lines and centre lines
- ways of laying out the shapes/patterns to maximise the use of plate or sheet material
- the use of setting and adjusting tools (such as squares and protractors)
- methods of marking out large or long shapes (using chalk lines and laser equipment)
- marking out and transferring information from templates
- the importance of using tools only for the purpose intended and the care that is required when using the equipment and tools
- why tool/equipment control is critical and what to do if a tool or piece of equipment is unaccounted for on completion of the activities
- the need for clear marks and dimensional accuracy in marking out to specifications/drawings
- the problems that can occur in marking out sheetmetal components and how these can be avoided
- the extent of your own authority and whom you should report to if you have problems that you cannot resolve
Scope/range
Scope Performance
Mark out on one of the following materials:
- cold rolled mild steel
- copper
- coated mild steel (tinned or galvanised)
- lead
- stainless steel
- titanium
- aluminium
- brass
- other specific materials
Mark out for three of the following forms/shapes of component:
- flat covers and plates
- fish plates
- square and radial bends
- gussets
- square/rectangular/box sections
- brackets
- cylindrical sections (such as trunking, pipes, tanks)
Mark out directly from drawings, using six of the following:
- scriber
- protractor
- punch
- dividers or trammels
- rule and tape
- bluing or paint
- straight edge
- templates
- square
- laser
- french chalk
- marker pen
Mark out material, to include four of the following features:
- datum and centre lines
- curved profiles
- square/rectangular profiles
- cutting and bending detail (including allowances)
- angles
- hole centring and outlining (circular or linear)
- circles
Produce marked out components which meet all of the following:
- company/customer standards and codes of practice
- dimensionally accurate (to drawing or specification)
- clearly defined for required processes
- use recognised marking out conventions
Scope Knowledge
Values
Behaviours
You will be able to apply the appropriate behaviours required in the workplace to meet the job profile and overall company objectives, such as:
- strong work ethic
- positive attitude
- team player
- dependability
- responsibility
- honesty
- integrity
- motivation
- commitment