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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 10.5. Marking gauge

To practise cutting-off chiselling of slots and chipping chiselling of narrow areas

Material

- Flat steel (380 MPa)

Thickness:

4 to 5 mm

Width:

24 mm

Length:

180 mm

- Flat steel (380 MPa)

Thickness:

10 mm

Width:

35 mm

Length:

50 mm

- Angle steel (380 MPa)

40 x 40 x 4


Length:

35 mm

- High straight-knurled screw


M 6 x 18

- Fillister head screw

M 3 x 10

- Wide washer

Hole diameter: 6,2 mm


Figure

Hand tools

Steel scriber or surface gauge, marking and centre punch, hand hacksaw, engineers' hammer, drills 2.5 mm dia.; 3.1 mm dia.; 5 mm dia.; 6 mm dia.; 6.2 mm dia.; nut taps M 3 and M 6, bastard and smooth files 250 mm (flat), mortise chisel, cape chisel, flat chisel

Measuring and testing tools

Steel rule, vernier caliper

Accessories

Vice, C-clamps, machine vice, steel plate or anvil

Required previous knowledge

Reading of drawings, scribing, prick-punching, measuring, testing, drilling, countersinking/counterboring, sawing, filing, thread cutting

Sequence of operations

Comments



1. Arrange workplace, prepare working material

- Check for completeness



2. Scribing of the component (1) and working of the outline to size

- Sawing, filing



3. Punching of the hole centres in the slot, drilling and chiselling out of the slot by the mortise chisel

- Hole 6 mm dia.
- Distance between the hole edges 0.2 mm



4. Control of the slot, subsequently finishing by filing



5. Scribing of the component (2) and working to size of the outer edges

- filing



6. Scribing of the flat groove (24.2), sawing of the groove edges, chiselling of grooves by the cape chisel, chiselling off of the remained webs by the flat chisel

- Pay attention to firm fixing!



7. Checking of the flat groove, subsequently finishing by filing




8. Working to size of the component (3); Fastening with part (2) and drilling jointly; Boring separately and threading

- sawing, filing
- hole 2.5 dia. and 5.0 dia.
- boring 3.1 dia. and 6.2 dia. according to the drawing



9. Mounting by means of parts (4), ,(5), (6)




10. Final check

- Accuracy to size, appearance, good slideability of the slide


Marking gauge