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Showing 1 to 16 of 16 for “"spindle speed"”.
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Machine tool chatter suppression using spindle speed variation
… be achieved in a boring process (2 DOF) when the speed of the spindle is modulated sinusoidally instead of being kept constant. Since the variation of spindle speed is small and independent of the tool motion, by expanding the delay terms about a finite mean delay and augmenting the system, the …
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The use of variable spindle speed for vibration control in face milling process
Vibration control is one of the most important issues in the metal cutting process. It has been recognized for several decades that many machining process performance measures are influenced by vibrations: e.g., surface finish, tool wear, and cutting force characteristics. Vibrations result in a …
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A Torque Based Power Input Model for Friction Stir Welding
… The heat input model shows that decreasing the spindle speed or increasing the feed rate significantly decreases the heat input at low feed rates. At high feed rates, feed rate and spindle speed have little effect on the heat input. Process parameter versus heat input trends are verified by …
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Dynamics and Stability of Parametrically Excited Gyroscopic Systems
… cut may be achieved in a boring process when the speed of the spindle is modulated sinusoidally instead of being kept constant. A detailed knowledge of the machine-tool structure dynamics, experiments and numerical simulations are required to determine the frequency and amplitude of the …
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Sustainability consideration in machining of 2½d milled features
… process parameters (depth of cut, width of cut, spindle speed and feed rate) increase, and can be minimised up to 75% for machining Aluminium 7075-T6 by using Haas TM 1CE Vertical milling machine (maximum spindle speed 4,000rpm) without conflicting with cost and time under the constraints of …
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A Dynamic Modeling Approach to the Optimal Design of Nonuniform Chip Loading in Face Milling
… by uneven insert spacing design and varying spindle speed design are investigated. The dynamic system performance is evaluated through force characteristics and associated vibrations, either forced or the chatter condition.
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Virtual three-axis milling process simulation and optimization
… selecting the depth of cut, width of cut, spindle speed and feedrate. A variety of user defined constraints such as maximum tool deflection, torque/power demand, and chatter stability are taken into consideration. Two alternative optimization strategies are presented: pre-process …
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Variable depth of cut machining for dynamic error compensation
… in existing VDCM systems include insufficient speed, accuracy, and servo stiffness. The goal of the proposed research is to advance VDCM to industrial applicability. Specifically, the research objectives are: (1) to develop an industrial grade VDCM system capable of compensating for …
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Empirical model-based control for end milling process
… steel) and the machining parameters (feed rate, spindle speed) at a predefined depth of cut. Regression model has been applied to derive an empirical relationship of the surface finish and the cutting force versus the machining parameters for the two mentioned materials. These relationships have …
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Statistical Investigation of Friction Stir Processing Parameter Relationships
… 4.76 mm pin length, and 7.9 mm pin diameter. Spindle speed, feed rate, and tool depth were varied throughout 54 welds while X, Y, and Z forces, X torque, three tool temperatures, and motor power were measured. Empirical models were developed to relate outputs to inputs. The relationships …
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Optimum design and machining parameters of a permanent magnet brushless DC linear motor as a CNC feed drive
… finish data. Relationships between force, and spindle speed and feedrate with tolerance and surface finish indices were determined. A heuristic has been developed which represents a guide of applying a set of decisions through the knowledge base to provide a set of operating parameters that …
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The development of in-process surface roughness prediction systems in turning operation using accelerometer
… surface roughness is predicted from feed rate, spindle speed, depth of cut, and machining vibration that is detected and collected by an accelerometer.;Two groups of data were collected for two cutters with nose radii of 0.016 and 0.031 inches, respective. A total of 162 training data sets and …
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Development and Characterization of Friction Bit Joining: A New Solid State Spot Joining Technology Applied to Dissimilar Al/Steel Joints
… the aluminum top sheet to be joined. After this, spindle speed is increased so that the bit tip effectively forms a friction weld to the steel bottom sheet. Momentary stoppage of the spindle facilitates weld cooling before the spindle is restarted, shearing the bit tip from the bit shank, and …
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A Study of Energy, Carbon Dioxide Emissions and Economics in Machining: Milling and Single Point Incremental Forming
… as process time decreased. In contrast, as spindle speed (N) increased, energy consumed increased, since more power is drawn by the motor, without a process time reduction. Given the inverse power relationship observed for the time, energy, process CO2 and cost against MRR, the recommended …
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Vibration assisted machining: Modelling, simulation, optimization, control and applications
… frequency, vibration amplitude, feedrate and spindle speed while taking into account machine dynamics effect and the outcomes such as surface roughness generated, tool wear and material removal rate in the process. The machine dynamics has been investigated including a static analysis, machine …
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Simultaneous machining of aerospace structural materials using poly-drills
… geometry, tool materials and coatings, cutting speed, feed rate, and drilling machines is required to meet the requirements of machined parts. The large number of holes required for riveting means that their installation must be carried out in a fast and precise manner. This can be achieved by …