Introduction	3
Chapter 1. Precision vacuum diffusion welding as a means forrealization of permanent assemblies of precise instrument engineering joints (PIEJ)	7
1.1. Permanent assemblies in PIEJ	-
1.2. Characteristics and features of construction materials	12
1.3. Welding features of materials used in PIEJ	18
1.4. Block diagram for solving problems of precision vacuum diffusion welding (PVDW)	27
Chapter 2. PVDW technology design	34
2.1. System of problem solution models for developing PVDW technology	-
2.2. Multilevel iterative method for precision welding process development	50
2.3. Information-logical model for PVDW technology designing	58
Chapter 3. Theory and technological fundamentals for PVDW process	68
3.1. Investigation of control principles for PVDW thermomechanical parameters and factors	69
3.2. Development of PVDW process with regulated load of external drive and under thermal tightness pressure	74
3.3. Development of initial conditions and estimation criteria for assembly formation possibility	87
3.4. Software and design procedure for process of wire intermediate layers formation	97
Chapter 4. PVDW process equipment facilities	107
4.1. Set for diffusion welding with local electron-beam heating	108
4.2. Set for multiposition PVDW of elements on parts of rotation body form	110
4.3. Welding module with combined pressure	113
4.4. Set for multiposition PVDW with thermal tightness pressure	115
4.5. PVDW module for thin-walled hemispherical shells	117
Chapter 5. Technology development and practical PVDW realization when producing joints for precise instrument engineering	120
5.1. Assembly units of gyro devices	-
5.1.1. Beryllium rotors of electrostatic gyro	-
5.1.2. Metal-ceramic joints of sensor gyrohousing	141
5.1.3. Joints and elements for spherical gyro with gas aerodynamic suspension, floated gyro and gravimeter core	153
5.2. Products of ionizing radiation technique	154
5.3. Joints with long-length capillary channels for products of analytical instrument engineering	157
Conclusion	159
References	160