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		Making Permanent Joints - Course: Basic skills and knowledge of electrical engineering. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 19 p.)
			(introduction...)
			Introduction
			1. Types and Meaning of Permanent Joints
			2. Tools for Making Permanent Electrical Joints (Bondings)
			3. Soldered Joints
			4. Wire-wrap Joints
			5. Notched Joints
			6. Pressed Joints

1. Types and Meaning of Permanent Joints

Permanent joints are engineering joints of two or more parts (components, conductors) and are made by joining,

Permanent joints

material closed

force-closed
(non-positive)

form-closed
(positive)

soldered joints

pressed joints

wire-wrap joints

welded joints

crimped joints

glued joints

notched joints

- Permanent joints are used to join (connect) materials.

- Permanent joints must withstand the same mechanical and electrical stress as the materials to be joined.

- Permanent joints can only be detached by destruction of the joining elements or of the parts joined.

	Permanent joints
material closed	force-closed (non-positive)	form-closed (positive)
soldered joints	pressed joints	wire-wrap joints
welded joints	crimped joints
glued joints	notched joints