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close this bookChiping - Course: Technique for Manual Working of Materials. Instruction Examples for Practical Vocational Training
View the document(introduction...)
View the documentIntroduction
View the documentInstruction example 10.1. Training workpieces for cutting-off chiselling
View the documentInstruction example 10.2. Case for safety goggles
View the documentInstruction example 10.3. Dog vice for sheet metal
View the documentInstruction example 10.4. Drilling support
View the documentInstruction example 10.5. Marking gauge

Instruction example 10.2. Case for safety goggles

To practise cutting-off and chipping chiselling of sheet steel

Material

- Sheet steel (380 MPa)

Thickness:

abt. 1.5 mm

Width:

320 mm

Length:

360 mm

- 4 x button-head rivet of 4 mm dia.


Figure

Hand tools

Brass scriber, steel scriber or surface gauge, flat chisel, engineers' hammer, centre punch, drills with flat point and centre point of 4.1 mm dia. and 8 mm dia., smooth file 250 mm (flat)

Measuring and testing tools

Steel rule

Accessories

Steel plate or anvil and spacer, protective wall or protective grating

Required previous knowledge

Reading of drawings, scribing, prick-punching, measuring, filing, drilling

Sequence of operations

Comments



1. Arrange workplace, prepare working material

- Check for completeness



2. Checking of initial dimensions of the sheet metal, if necessary, reworking

- (shearing, filing)



3. Scribing of the edges to be parted and bent as per drawing, scribing and punching of the holes

- Attention!
When using a steel scriber, scribe lightly on the inside of the bending edge - otherwise danger of breaking when bending!



4. Drilling of the holes with the drill with flat point and centre point - corner holes of 8 mm dia., rivet holes of 4.1 dia., deburring of the holes

- Protect workpiece against pulling up and twisting!



5. Chiselling out of the outlines of the case - at one side with overlapping chisel neck along the scribed line




6. Deburring of the edges




7. Checking of the edges

- Cleanliness, accuracy to size

Finishing: Bending of the side parts by means of a bending machine and on the vice, riveting of the side parts with button-head rivets of 4 mm dia.


Case for safety goggles