Kyocera - Основной каталог 2010-2011 ENG

                                                                                   для заказа - kyocera@kyocera-tools.ru                          Turning Toolholder

                Terms and Angles of Toolholder

                  Terms and Angles of Turning Toolholder

                                     Side Relief Angle             Side Rake Angle

                                                                                                          Total Length
                                                                              Minor Cutting Edge Angle

                                                                                                                                                          Shank Width

                                                         Corner Radius                                   Approach Angle
                                                                                Cutting Edge Angle

                                     Cutting Edge Height

                                                                                                         Inclination Angle

                                                                                                         Shank Height

                                                          Front Relief Angle

                Function of Tool Angle

                Tool Angle           Name                 Function                                                                        Effect

                Rake Angle           Side Rake Angle     • Affects cutting force, cutting                • If it is positive (+) angle, sharper cutting performance is obtained.
                                     Inclination Angle    heat, chip evacuation and                       (less cutting resistance, less edge strength)
                                                          tool life.
                                                                                                         • Positive (+) angle is recommended for easy to machine workpieces or
                Relief Angle         Front Relief Angle  • Prevents the tool’s contact                    thin workpieces.
                                     Side Relief Angle    to the workpiece surface,
                                                          except the cutting edge.                       • Smaller rake angle or negative (-) angle is recommended when a
                                                                                                          stronger edge is required like scale cutting or interrupted cutting.

                                                                                                         • When it is small, the cutting edge becomes strong, but the wear at relief
                                                                                                          faces may shorten the tool life.

                                     Cutting Edge        • Affects chip control and the                  • When it is large, chip thickness becomes thick and chip control
                                         Angle            direction of cutting force.                     improves.

                Cuting Edge          Approach Angle      • Affects chip control and the                  • When it is large, chip thickness becomes thin and chip control worsens,
                    Angle                                 direction of cutting force.                     but cutting force is dispersed and edge strength improves.

                                                                                                         • When it is small, chip control ability improves.

                                     Minor Cutting       • Prevents friction between cut-                • When it is large, edge strength deteriorates.
                                      Edge Angle          ting edge and work surface.

          Toolholder Rigidity                                                                            2. Flexure of Boring Bar
R

         1. Flexure of Toolholder

                                                         Symbol    Name                         Measure                                                   Symbol       Name                     Measure

                                                          (Delta)  Deflection                                                                             (Delta)  Deflection

                                                                   Shank Width                                                                            D Shank Dia.
                                                                                                                                                                        Young ratio
                                                          h Shank Height

Technical                 Incorrect                                Young ratio                                                                                              ap
   Information  Over hang                                                                                                                                              Feed rate
                                                                   ap                                                                                              Specific Cutting Resistance

                                                                   Feed rate

                                                                   Specific Cutting Resistance                                                            L Over hang
                                                                                                                                                                       Cutting force
                                                          L Over hang                                                                     Clamp Screw

                                                                   Cutting force

                The flexure of toolholder will decrease by increasing of shank height by third root      Cutting force F                                  Load
                and will decrease of reducing over hang by third root. Minimizing toolholder shank
                over hang as much as possible is important as well as shank's sectional square                               Supporting
                measure.                                                                                                         point

                                                                                                                             Over hang.          Sleeve                  Amount
                                                                                                                                                                              of

                                                                                                                                                                       displacement

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