Chiping - Course: Technique for Manual Working of Materials. Instruction Examples for Practical Vocational Training: Instruction example 10.4. Drilling support

Chiping - Course: Technique for Manual Working of Materials. Instruction Examples for Practical Vocational Training

		(introduction...)
		Introduction
		Instruction example 10.1. Training workpieces for cutting-off chiselling
		Instruction example 10.2. Case for safety goggles
		Instruction example 10.3. Dog vice for sheet metal
		Instruction example 10.4. Drilling support
		Instruction example 10.5. Marking gauge

To practise chipping chiselling of faces and grooves on cast iron.

Material

Figure

Hand tools

Steel scriber, punch, hammer, cape chisel 5 mm, flat chisel, half-round grooving chisel 4 mm

Measuring and testing tools

Steel rule, depth gauge

Accessories

C-clamp, steel plate, protective wall or protective grating

Required previous knowledge

Reading of drawings, scribing, prick-punching, measuring, testing

Sequence of operations	Comments

1. Arrange workplace, prepare working material	- Check for completeness

2. Checking of initial dimensions	- Set check punch marks

3. Scribing of the step edge (35 x 100) and of the centre lines of the grooves on this face

4. Chiselling of the grooves with the cape chisel from both sides, chiselling off of the remained webs by the flat chisel	- approx. 3 chip thicknesses

5. Scribing of the chamfer 5 x 45 and chiselling off with the flat chisel	- approx. 2 chip thicknesses

6. Scribing of the groove cross (centre lines)

7. First chisel completely one groove with the grooving chisel, then, proceeding from the middle, chisel the second groove towards both sides	- approx. 1 chip thickness

8. Final check	- Straightness of the grooves, uniformity of the plane areas

Drilling support