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The design and implementation of force control for robotic rigid disk grinding are described Experiments were conducted using a PUMA 762/VAL II industrial robot equipped with a 4 hp pneumatic grinder and a JR/sup 3/ force sensor An external 386 based host microcomputer communicating with VAL II online performs the force control algorithm
·The grinding forces prediction model Werner concluded has not clearly distinguished chip deforming force and friction force A prediction model was finally presented which could represent deforming force and friction force separately [9 10] In fig 1 Lijun Li regarded grinding deforming force and friction force as main research target and
·Grinding is the main processing method for particle reinforced composites and grinding force prediction models are very important for research on removal mechanisms In this study single abrasive grain grinding experiments on SiCp/Al composites were conducted to determine the grinding forces at different grinding process
·Ti 4822 TiAl alloy is a typical intermetallic compound with great potential applications in aeronautics and astronautics and is widely available to high pressure compressors and low pressure turbine blades of aero engines Laser directed energy deposition LDED is appropriate to form the Ti 4822 parts with complex shapes and
·The grinding process is one of the most important and widely used machining processes to achieve the desired surface quality and dimensional accuracy Due to the stochastic nature of the grinding process and process conditions the instantaneous micro mechanisms between each grain and the workpiece are momentarily changing and
·Grinding force is the sum of individual forces acting from grits to workpiece during the grind ing process The force basically consists of chip formation force sliding force and ploughing force and each force originate as a result of the mode of interaction between grit and work piece In past many grinding force models have
·The intermittent cutting behavior performing as periodic contact phase and separation phase between abrasive grit and workpiece is an important characteristic in the ultrasonic vibration assisted grinding UVAG This study investigated the effect of intermittent cutting behavior on the grinding force in UVAG At first a grinding force model
·Grinding force is an important index for understanding grinding mechanism In this paper based on the single grain grinding experiment the grinding force under different grinding parameters was studied Based on the undeformed chip the grinding force model of multi grain abrasive was established Combined with the
·Grinding force has an important impact on the ground precision and quality of a workpiece At present the effects of the workpiece structure and the change in the abrasive wheel diameter on grinding force are ignored during profile grinding Therefore to reduce the grinding force and improve the grinding integrity profile grinding experiments
·To provide technical support for efficient and low damage machining of ceramic matrix composites a method to model the grinding force for longitudinal torsional ultrasound assisted face grinding LTUFG was investigated Based on the kinematic analysis the influences of longitudinal and torsional vibration on the effective cutting time
·The grinding force of three contact lines is measured by the force measuring instrument of KISTLER 9119AA2 model As shown in Fig 17 the amplitude of grinding force is basically similar to that of simulation force and they are both intermittent forces The wavelength of each grinding force peak is close to the actual grinding force wavelength
·This chapter presents an experimental study of grinding forces as relationship of workpiece speed v feed rate sa and depth of cut a For the modeling of cylindrical grinding used was response surface methodology and genetic algorithms Modeled was the tangential force Ft and the normal force Fn in cylindrical grinding The
·Grinding forces are composed of chip formation rubbing and ploughing forces At the very first stage of the interaction between abrasive grit and the workpiece plastic deformation occurs temperature of the workpiece increases and let normal stress to exceed yield stress of the material After a certain point abrasive grit starts to
·The grinding process is a widely used finishing operation in the manufacturing chain due to its low cost high machining efficiency and good finish quality [] The grinding force is a crucial factor to estimate the grinding process since grinding force influences the grinding performance workpiece surface quality and wheel wear
·A predictive model of grinding force in MSG of three different orientations of single crystal sapphire C plane {0001} A plane {11 2 ¯ 0} and R plane {1 1 ¯ 02} are The MSG experiments results show that {0001} orientation could produce comparatively smaller grinding force which is almost 80% of the {11 2 ¯ 0} and 50% 65%
A new simple model of grinding force in surface grinding is proposed in this paper The model is based on the fact that the grinding forces are composed of chip formation force and sliding force The formula for calculating the tangential and normal grinding force per unit width is obtained based on the classical formulas The coefficients in the formula are
·C/SiC has excellent mechanical properties and is extensively utilized in the aerospace field Meanwhile it is a typical intractable material in virtue of its special intrinsic structure To investigate the grinding force and material removal mechanism of fiber reinforced CMC a unidirectional C/SiC composite material was designed and prepared A
·The modeling of grinding forces in ceramic matrix composites has attracted growing attention as evidenced by the discussion above Specifically the grinding force model which takes into account the composites properties and removal behavior acts as a communication bridge between the micro interaction mechanism and macro machining
·In the grinding the active abrasive grain quantity AAGQ and the undeformed chip thickness UCT are the key parameters for revealing the material removal mechanism 7 8 9 Due to the size different and random distribution characteristics of abrasive grains only some outmost abrasive grains have the ability to remove the
·Ultrasonic assisted machining of silicon carbide SiC ceramic matrix composites CMCs has the ability to decrease grinding force and improve processing quality The machining process often produces large cutting forces which cause defects such as delamination and burrs due to the brittleness and high hardness of the material
·Local Analysis of the Cutting Forces In grinding trials for the presented gear the influence of the axial feed the cutting velocity the grinding stock and the number of starts have been determined The results of these variations can be found in Fig 7 In these four pictures the measured values are marked with a dashed line and a filled marker
·In micro grinding the effects of crystallography on grinding force become significant since the depth of cut is of the same order as the grain size In this research the Taylor factor model for multi phase materials is proposed based on the previously reported Taylor factor model for monocrystalline material Based on this model the flow stress
·Aiming at above problems of constant force belt grinding Inconel 718 this paper comprehensively investigates the force and thermal characteristics the grinding effect the grinding force ratio the specific grinding energy and the dynamic grinding temperature distribution The rest of the paper are structured as follows
·Some studies have attempted grinding force predictions Most of them however were based on empirical modelling in which the parameters were primarily determined by experimental measurements in conjunction with mathematical regressions [15] [16] [17] The fundamentals of grinding force model can be traced back to 1950s [18]
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