generation of surfaces kinematic geometry of surface machining

... expression of the optimal parameters of kinematics of the sculptured surface machining on a multi-axis NC machine in terms of geometry of the part surface and of the generating surface of the form-cutting ... Classification of Surfaces The number of different surfaces that bound real objects is innitely large. A systematic consideration of surfaces for the purposes of surface generation is of critical ... Group, LLC KINEMATIC GEOMETRY OF SURFACE MACHINING â 2008 by Taylor & Francis Group, LLC 18 Kinematic Geometry of Surface Machining surface P there exists a corresponding motion of a special...

Ngày tải lên: 27/06/2014, 05:20

... expression of the optimal parameters of kinematics of the sculptured surface machining on a multi-axis NC machine in terms of geometry of the part surface and of the generating surface of the form-cutting ... of Contact of the Surfaces P and T 138 4.6.1 On a Possibility of Implementation of the Indicatrix of Conformity for Identication of Kind of Contact of the Surfaces P and T 138 4.6.2 Impact of ... 459 11.2 Machining of Surfaces of Revolution 469 11.2.1 Turning Operations 469 11.2.2 Milling Operations 474 11.2.3 Machining of Cylinder Surfaces 475 11.2.4 Reinforcement of Surfaces of Revolution...

Ngày tải lên: 27/06/2014, 08:20

... of Contact of the Surfaces P and T 138 4.6.1 On a Possibility of Implementation of the Indicatrix of Conformity for Identication of Kind of Contact of the Surfaces P and T 138 4.6.2 Impact of ... 459 11.2 Machining of Surfaces of Revolution 469 11.2.1 Turning Operations 469 11.2.2 Milling Operations 474 11.2.3 Machining of Cylinder Surfaces 475 11.2.4 Reinforcement of Surfaces of Revolution ... expression of the optimal parameters of kinematics of the sculptured surface machining on a multi-axis NC machine in terms of geometry of the part surface and of the generating surface of the form-cutting...

Ngày tải lên: 13/08/2014, 09:20

... Classification of Surfaces The number of different surfaces that bound real objects is innitely large. A systematic consideration of surfaces for the purposes of surface generation is of critical ... Because of this, not a kinematic scheme of surface generation but a principal instant kinematics of sculptured surface generation has to be investigated instead. Kinematics of sculptured surface generation ... surface machining — that is, from the case of machining a sculptured surface on a multi-axis NC machine. 2.1 Kinematics of Sculptured Surface Generation For machining of sculptured surfaces...

Ngày tải lên: 13/08/2014, 09:20

... descriptions of surfaces that allow sliding over themselves. 2.5 Feasible Kinematic Schemes of Surface Generation Kinematics of surface generation is a cornerstone of an innite variety of various machining ... principal instant kinematics of surface generation. This is one more example of the difference between the classical differen- tial geometry of surfaces and the kinematic geometry of surface generation. The ... Group, LLC 46 Kinematic Geometry of Surface Machining nonagile kinematics of surface generation can be considered as a particular (degenerated) case of agile kinematics of surface generation, ...

Ngày tải lên: 13/08/2014, 09:20

... the local -surface contact of surfaces of the rst kind is identical to the true -surface contact of the surfaces. 2. Consider line kind of contact of the surfaces P and T. When the surfaces ... 110 Kinematic Geometry of Surface Machining 4.4.2 Indicatrix of Conformity of the Surfaces P and T Introduced in this section is a quantitative measure of the rate of conformity of two surfaces. ... cases of the surface s conguration. Application of Dupin’s indicatrix of the surface of relative curvature enables only approximate analytical descrip- tion of the geometry of contact of the surfaces. ...

Ngày tải lên: 13/08/2014, 09:21

... 184 Kinematic Geometry of Surface Machining of the parameter of motion w. The theory of surface generation also deals with surfaces for which the enveloping surface is congruent to the moving surface. 5.2.1.3 ... conguration. Denition 4.3: Q u asi -surface (of the second kind) contact of the surfaces P and T is a kind of point contact of the surfaces under which actual tan- gency of the surfaces is within the true-point ... contact of the surfaces. Moreover, the productivity of surface generation when maintain- ing the quasi-kind of contact of the surfaces P and T is practically identical to the productivity of surface...

Ngày tải lên: 13/08/2014, 09:21

Ngày tải lên: 13/08/2014, 09:21

Ngày tải lên: 13/08/2014, 09:21

Ngày tải lên: 13/08/2014, 09:21

Ngày tải lên: 13/08/2014, 09:21

Ngày tải lên: 13/08/2014, 09:21

Ngày tải lên: 13/08/2014, 09:21

Ngày tải lên: 13/08/2014, 09:21

Ngày tải lên: 13/08/2014, 09:21

Ngày tải lên: 13/08/2014, 09:21

... of the kinematics of grasping and the movements of pointing toward an object in patients with C6 tetraplegia have been described [24]. However, we found no studies of the kinematic analysis of ... groups of patients with tetraplegia. This was a useful application of kinematic analysis of upper limb movement in a clinical setting. Better knowledge of the execution of this movement in each of ... the moment corresponding to 72.64% of the cycle of subjects with C6 tetraplegi a, 73.45% of the cycle of sub- jects with C7 tetraplegia and 71.38% of the cycle of CG) (Figure 4). On the other hand,...

Ngày tải lên: 19/06/2014, 08:20

Ngày tải lên: 18/12/2013, 21:45

... magnification of original spectra. (D) Absorption spectra of the acid- denatured K13N mutant (spectrum a), of the K13N mutant after 3 ms of mixing with 40 m M sulfate (spectrum b), and after 5 s of mixing with ... reagents used were of analytical grade. Construction of horse cytochrome c expression system A version of the horse cytochrome c synthetic gene was designed on the basis of the sequence of a previously ... of electrostatic repulsions in the acidic molten globule of cytochrome c. J Mol Biol 222, 679–686. 13 Jordan T, Eads JC & Spiro TG (1995) Secondary and tertiary structure of the A state of...

Ngày tải lên: 19/02/2014, 05:20

... years and the other members of the Executive Board for terms of office of between five and eight years. No term of office shall be renewable. The number of members of the Executive Board may be ... conditions of Accession of the Czech Republic, the Republic of Estonia, the Republic of Cyprus, the Republic of Latvia, the Republic of Lithuania, the Republic of Hungary, the Republic of Malta, ... of office shall be eight years and shall not be renewable. Only nationals of Member States may be members of the Executive Board. 11.3. The terms and conditions of employment of the members of...

Ngày tải lên: 06/03/2014, 10:20