Constant Feed Rate Research Articles

Experimental investigations with machine learning techniques for understanding of erosion wear in advanced aluminum nanocomposites

This article addresses the significant challenge of erosion wear in aluminum composites, particularly in industries such as automotive, aerospace and energy, where sustained material performance is crucial. The study focuses on the experimental investigation of erosive wear characteristics exhibited by advanced aluminum nanocomposites, utilizing an air jet erosion wear test apparatus. The erosion wear tests were conducted using diverse parameters, such as angles (30°, 45°, 60° and 90°), air pressures (1–4 bar) and a fixed 600-s duration, maintaining a constant sand particle feed rate of 2.0 (g/min) and utilizing stand-off distances of 10, 15 and 20 mm. Surface assessments were conducted using field emission scanning electron microscopy (FE-SEM) and energy-dispersive X-ray spectroscopy (EDS). The results revealed observable specimen wear, particularly at a 45° angle, with wear rates decreasing at higher impingement angles and reaching a minimum at 90°. Notably, the Al-4 wt.%TiC nanocomposites exhibited a 25% improvement in wear resistance compared to the base alloy. Further analysis of eroded surfaces through (FE-SEM) revealed a mechanism involving micro-cutting, plowing and grain pull-out, attributing wear primarily to plastic deformation and crack formation. Evaluating erosive wear results through six machine learning (ML) models demonstrated that gradient boosting regression emerged as the most accurate, achieving an R2 value of 0.97. This highlights the effectiveness of ML in predicting erosion wear rates and offers insights for improving aluminum composite materials in demanding industrial applications.

Improvement of Machinability of Hardened Steel in Turning Operation Using Cryogenically Treated Cutting Tool

Hardened steels need special cutting tools like PCBN and ceramic to be machined. But these cutting tools aren’t cost-effective and require machine tool structures that are stiff and don’t let vibrations through. The current trend is to find other, less expensive ways to make these materials easier to work with. Cryo-treating cutting tools is an effective way to improve the way the tool materials work when they are cut. Cryogenically treated tungsten carbide inserts in dry turning operations were looked at in this study. For hard turning of hardened mild steel (48 HRC), the performance of cryogenically treated Tungsten Carbide (WC) inserts was compared with that of untreated inserts in terms of chip-tool interface temperature and surface roughness under dry cutting conditions. The cutting tool (Untreated and Treated), and cutting speed (375, 512, 706 rpm) were selected as experiment parameters at a constant feed rate of 0.0841mm/rev and depth of cut 1mm. The chip-tool interface temperature analysis results revealed that temperature increases with the increasing cutting velocities. A better surface finish can be found at a higher cutting speed. The lower value of Ra was found at 1.75 μm (without cryogenic treatment) and 1.05 μm (with cryogenic treatment) for cutting speed at 706 rpm.

INFLUENCE OF MACHINING PARAMETERS AND TOOL GEOMETRY ON TOOL WEAR DURING COBALT CHROMIUM-MOLYBDENUM MICRO DRILLING

Cobalt chromium (CoCr) alloys find extensive use in medical applications due to their unique mechanical properties, such as high strength and low thermal conductivity. However, machining these alloys poses challenges as they are classified as hard-to-cut materials, leading to issues like short tool life, poor surface quality, and low productivity. Rapid tool wear is a significant problem when machining hard alloys, with cutting parameters, drill bit geometry, and types of cutting fluids being the main factors influencing tool wear. In this study, a series of experiments was conducted to investigate the influence of different cutting speeds and tool geometry on tool wear during micro drilling of CoCrMo. A flood cooling system was employed throughout the study, with a constant machining feed rate of 0.1 mm/rev. Three cutting tools with different point angles (118°, 130°, and 140°) and a diameter of 0.2 mm were utilized. The cutting speeds of 50 m/min, 65 m/min, and 80 m/min were varied. A total of 11 runs were performed, with each run consisting of drilling 30 holes. Forces, torques, and tool wear were measured after every subsequent 10 holes drilled. The results indicate that the combination of a 140° point angle and an 80 m/min cutting speed yielded the best performance, exhibiting the lowest force, torque, and tool wear values..

Reduction of Alternaria Toxins via the Extrusion Processing of Whole-Grain Red Sorghum Flour.

This study delved into the impact of two extrusion processing parameters-screw speed (SS at 400, 600, 800 RPM) and material moisture content in the extruder barrel (M at 12, 15, 18%) at constant feed rate (50 kg/h)-on reducing the content of alternariol (AOH), alternariol monomethyl ether (AME), tenuazonic acid (TeA), and tentoxin (TEN) in whole-grain red sorghum flour. Ultra-performance liquid chromatography combined with a triple-quadrupole mass spectrometer (UPLC-MS/MS) was employed for the determination of Alternaria toxin levels. The extruder die temperature fluctuated between 136 and 177 °C, with die pressures ranging from 0.16 to 6.23 MPa. The specific mechanical energy spanned from 83.5 to 152.3 kWh/t, the torque varied between 88 and 162.8 Nm, and the average material retention time in the barrel ranged from 5.6 to 13 s. The optimal parameters for reducing the concentration of all Alternaria toxins with a satisfactory quality of the sorghum snacks were: SS = 400 RPM, M = 12%, with a reduction of 61.4, 76.4, 12.1, and 50.8% for AOH, AME, TeA, and TEN, respectively.

Study on the friction drilling behaviors and tribological properties of aluminum matrix composites

This study investigates Al 6063 matrix composites reinforced with different weight percentages of B4C (5%, 10%, 15%, and 20%) produced through powder metallurgy and hot extrusion. The resulting specimens were subjected to a comprehensive investigation to elucidate the effect of B4C reinforcement on the density, tensile strength, transverse rupture strength (TRS), hardness, tribological characteristics, and friction drilling behavior. The pin-on-disk wear tests were conducted in a dry environment, while the friction drilling experiments were performed under constant spindle speed and feed rate conditions, both in dry and minimum quantity lubrication (MQL) environments. The findings revealed a uniform B4C particle dispersion and strong interface bonding in the matrix and that the hardness, tensile strength, TRS, and wear resistance of the specimens increased as the weight fraction of the reinforcement increased. The 15 wt% and 20 wt% B4C composites showed the highest wear resistance, improving by 62.78% compared to Al6063. Higher B4C content reduced specific wear rates and reduced friction coefficients. Among the specimens under investigation, the Al6063 composite reinforced with 15 wt% B4C indicated the highest tensile, transverse rupture, whereas the Al6063 composite with 10 wt% B4C exhibited the best thread-pull-out strength (TPS). The friction-drilled 10 wt% B4C composites showed the highest thread-pull-out strength reaching 373.44 N/mm² in MQL and 329.74 N/mm² in dry conditions.

Assessing the torque and thrust forces in micro-drilling of thermal barrier coated nickel superalloys

Nickel superalloys are crucial materials for aerospace applications, offering exceptional performance at high temperatures. Key components in aircraft engines, such as turbine blades, guiding vanes, afterburners, and casings, require the intricate process of micro-drilling to enable effusion cooling. However, when dealing with nickel-based superalloys, tool breakage during micro-drilling is a substantial drawback. This study investigates the cutting forces acting at the tool-workpiece interface during the micro-drilling of thermal barrier-coated Nimonic 90. The micro-drilling was conducted under three lubrication conditions: dry, flood, and 0.5% Graphene-based NMQL, utilizing a 700 μm diameter TiAlN-coated tungsten carbide drill. Experiments were performed at spindle speeds of 1000, 2000, and 3000 rpm, with a constant feed rate of 3 μm/rev. Results revealed that under dry conditions, the micro-drill failed after drilling just 16, 18, and 15 holes at spindle speeds of 1000, 2000, and 3000 rpm, respectively. In contrast, no failures occurred under flood and 0.5% Graphene-based NMQL lubrication conditions, likely due to improved heat dissipation, resulting in reduced thrust forces and torque acting on the micro-drill. Thrust force and torque values were measured using a Kistler 3-component mini dynamometer, with maximum values of 26 N and 0.31 N-m at 1000 rpm under dry lubrication conditions. These values decreased to 24 N and 0.25 N-m and 22 N and 0.19 N-m at spindle speeds of 2000 and 3000 rpm, respectively. NMQL lubrication conditions consistently exhibited lower thrust force and torque values compared to dry and flood conditions, with the lowest recorded values (12.5 N and 0.06 N-m) at 3000 rpm in the NMQL lubrication condition. The NMQL condition facilitated for efficient and better drilling operation due to the rolling effect produced by the graphene nanoparticles.

Salinity impacts on a unique desalination system embedded with concentrated solar energy for cleaner production

This research comprehensively analyzed a unique solar desalination unit that operates on concentrated solar energy. The analysis primarily focused on evaluating three crucial components: the condenser, flash chamber, and brine heater. Testing was initially performed using seawater sourced from the eastern region of Saudi Arabia. Subsequently, to investigate the influence of salinity on the system performance, the device was tested under variable salinity levels ranging from 15,000 ppm to 35,000 ppm. Key parameters, including condenser temperature, brine heater temperature, and distillate production, were measured throughout the experimentation. The findings unveiled an inverse correlation between salinity and distillate production, as increasing the salinity from 15,000 ppm to 35,000 ppm resulted in a decline in distillate production. The maximum distillate achieved was 2400 ml/h at a salinity level of 15,000 ppm, corresponding to a constant feed rate of 0.2 l/min. The average energy efficiency of the brine heater was determined to be 61.9%. Moreover, the average exergy efficiencies were calculated as 81.3% for the condenser, 4.4% for the brine heater, and 44.3% for the flash chamber. Mathematical models were subsequently developed to establish the relationships between salinity and various system responses. Furthermore, performance metrics such as gain output ratio, energy utilization factor, and specific energy consumption were evaluated. The proposed system has a maximum gain output ratio of 16, a maximum energy utilization factor of 2.2, and a minimum specific energy consumption of 299.3 kWh/m3.

New milk protein anisotropic structures formed by high moisture extrusion

In this work, the formation of anisotropic, layered structures from milk protein concentrates was investigated using high moisture extrusion. These structures were obtained in combination with three concentrations of starch (0 %, 14 %, and 33 %, d.b), and at three different moisture levels: 58 %, 63 %, and 68 %. Two different temperature profiles were investigated, reaching a maximum barrel temperature of 80 and 115 °C (and maximum melt temperature of 56 and 64 °C, respectively), with a constant screw speed and feed rate. In situ monitoring of torque, as well as the evaluation of water partitioning via proton relaxometry highlighted the interplay between moisture content and barrel temperature in starch transitions and water intake. For example, the presence of starch displayed water populations of distinct mobility, featured by higher relaxation times, and the apparition (or intensification) of new peaks representing free water in the system. The extruded samples showed a multi-phase system with swollen starch granules embedded in a protein network when 14 % starch was used, at moisture <63 %, as depicted by confocal microscopy. Tensile strength and cutting force tests showed a broad range of textures, from more brittle at high starch concentration, to softer and mushier when extruded at high moisture. Increasing starch and moisture content disrupted the protein network structure. This work demonstrated that milk protein concentrates show great potential to create novel anisotropic structures by extrusion, with tunable texture properties depending on starch, moisture and temperature conditions.

Process development and process adaption guidelines for the deposition of thin-walled structures with IN718 using extreme high-speed directed energy deposition (EHLA3D)

Extreme high-speed directed energy deposition (EHLA) is a modified variant of the laser based directed energy deposition (DED-LB) and is being applied as an efficient coating process for rotational symmetric components. Characteristics of EHLA processes are feed rates of up to 200 m/min, which result in smaller weld bead deposition and thinner layer thicknesses compared to conventional DED-LB. When transferred to additive manufacturing, this characteristic utilizes the potential of depositing thin-walled filigree structures at deposition rates, which are comparable to typical DED-LB processes (EHLA3D). The results of this work were achieved with an EHLA3D machine, which is a modified CNC-type machine capable of operating feed rates with vf = 30 m/min. In this work, process parameters were developed for the deposition of thin-walled filigree structures with the Ni-based superalloy IN718. Single tracks with constant feed rates and a variation in the beam diameter and powder mass flow were deposited and analyzed regarding the resulting weld bead dimension and dilution zone. Then, process parameters were selected and transferred to the deposition of thin walls, and guidelines of the parameter adaption toward thin-walled deposition were defined. Two parameter sets were developed to assess the feasible wall-thicknesses deposited by EHLA3D. Depending on the developed parameter sets, wall thicknesses between 300 and 500 μm are achieved. To characterize the resulting thin-walls, surface roughness measurements and metallographic cross sections were conducted.

ИССЛЕДОВАНИЕ АКСИАЛЬНОГО УСИЛИЯ ПРИ СВАРКЕ ТРЕНИЕМ ПЕРЕМЕШИВАНИЕМ АЛЮМИНИЯ И МЕДИ

The article considers the force applied to the welding tool during friction stir welding of commercially pure copper M1 and aluminum AD1. A technique for measuring the axial force applied to the tool is presented. The results of the study show that the speed of rotation and feed (welding) of the tool affect the value of the axial force. While maintaining a constant feed rate of the tool, the axial force increases as the speed of its rotation decreases. The maximum value of the force was 28.75 kN at a rotation speed ω= 800 rpm. Increasing the tool speed to 900 and 1000 rpm leads to a decrease in axial force by 15% and 40% of the maximum that occurs at 800 rpm. At a fixed tool speed and increasing welding speed, the change in axial force is negligible.

Fabrication of immobilized xylanase by a novel 3D electrostatic printing as an excellent catalyst for corn straw degradation

Extrusion-based 3D printing has been widely utilized in enzyme immobilization to obtain the desired shape, even though the result is less fine. Here, we report a novel 3D electrostatic printing (3DEP) technology that combines the technologies of electrospinning and 3D printing to manufacture fiber membranes that are finer and uniform and used them for xylanase immobilization. After optimizing the preparation conditions for the 3DEP immobilization carrier, the finer, uniform fiber membranes were printed by using a ratio of 10:1 polyvinyl alcohol (PVA) and chitosan (Cs) under a constant voltage (5 kV) and feed rate (0.001 mm/s). Additionally, 50% glutaraldehyde (GA) vapor was used for cross-linking Cs in order to improve the water insolubility of the support. The 3DEP immobilized xylanase was then prepared by mixing xylanase and the printed materials. The resulting immobilized xylanase exhibited excellent stability, with over 95% of enzyme activity following storage for 28 days, and 53% xylan conversion was still retained after reuse over 8 batches. Finally, the 3DEP immobilized xylanase featured good catalytic efficiency in degrading corn straw. Collectively, the results of this study show that 3DEP offered a finer carrier manufacturing technology and could improve the catalytic efficiency of the immobilized enzyme.

Improving Biomethanol Synthesis via the Addition of Extra Hydrogen to Biohydrogen Using a Reverse Water–Gas Shift Reaction Compared with Direct Methanol Synthesis

Conventionally, methanol is derived from a petroleum base and natural gas, but biomethanol is obtained from biobased sources, which can provide a good alternative for commercial methanol synthesis. The fermentation of molasses to produce biomethanol via the production of biohydrogen (H2 and CO2) was studied. Molasses concentrations of 20, 30, or 40 g/L with the addition of 0, 0.01, or 0.1 g/L of trace elements (TEs) (NiCl2 and FeSO4·7H2O) were investigated, and the proper conditions were a 30 g/L molasses solution combined with 0.01 g/L of TEs. H2/CO2 ratios of 50/50% (v/v), 60/40% (v/v), and 70/30% (v/v) with a constant feed rate of 60 g/h for CO2 conversion via methanol synthesis (MS) and the reverse water–gas shift (RWGS) reaction were studied. MS at temperatures of 170, 200, and 230 °C with a Cu/ZnO/Al2O3 catalyst and pressure of 40 barg was studied. Increasing the H2/CO2 ratio increased the maximum methanol product rate, and the maximum H2/CO2 ratio of 70/30% (v/v) resulted in methanol production rates of 13.15, 17.81, and 14.15 g/h, respectively. The optimum temperature and methanol purity were 200 °C and 62.9% (wt). The RWGS was studied at temperatures ranging from 150 to 550 °C at atm pressure with the same catalyst and feed. Increasing the temperature supported CO generation, which remained unchanged at 21 to 23% at 500 to 550 °C. For direct methanol synthesis (DMS), there was an initial methanol synthesis (MS) reaction followed by a second methanol synthesis (MS) reaction, and for indirect methanol synthesis (IMS), there was a reverse water–gas shift (RWGS) reaction followed by methanol synthesis (MS). For pathway 1, DMS (1st MS + 2nd MS), and pathway 2, IMS (1st RWGS + 2nd MS), the same optimal H2/CO2 ratio at 60/40% (v/v) or 1.49/1 (mole ratio) was determined, and methanol production rates of 1.04 (0.033) and 1.0111 (0.032) g/min (mol/min), methanol purities of 75.91% (wt) and 97.98% (wt), and CO2 consumptions of 27.32% and 57.25%, respectively, were achieved.

Local control of microstructure and mechanical properties of high-strength steel in electric arc-based additive manufacturing

Additive manufacturing offers a significant potential for producing metallic parts with distinctly localised microstructures and mechanical properties, commonly known as functional grading. While functional grading is generally accomplished through compositional variations or in-situ thermo-mechanical treatments, variation of process parameters during additive manufacturing can offer a promising alternative approach. Focusing on the electric arc-based additive manufacturing process, this work focuses on the functional grading of high-strength steel (S690 grade) by adjusting the travel speed and inter-pass temperature. Through a combination of thermal simulations and experimental measurements on single bead-on-plate depositions, it is shown that the microstructure and the mechanical properties of parts can be controlled through the rational adjustment of process parameters. A rectangular block was fabricated to demonstrate functional grading using a constant wire feed rate and varying travel speed. The rectangular block consisted of a low heat input (LHI) region deposited between high heat input (HHI) zones. A graded microstructure was obtained with the HHI zones composed of a mixture of polygonal ferrite, acicular ferrite, and bainite, while the LHI region was primarily composed of martensite. The hardness and profilometry-based indentation plastometry measurements indicated that the LHI region exhibited higher hardness (32%) and strength (50%), but lower uniform elongation (80%), compared to the HHI zones. The present study demonstrates the potential to achieve functional grading by adjusting process parameters in electric arc-based additive manufacturing, providing opportunities for tailor-made properties in parts.

Influence of Coolant Properties and Chip Former Geometry on Tool Life in Deep Drilling

The aim of the article is to find a correlation between a change in the properties of the cooling agent and a change in the geometry of the chipformer, as both are reflected in the service life of the tool after deep drilling. The reason for carrying out the research is the requirement of practice to obtain the economic efficiency of the production of such a demanding process as deep drilling. When applying the latest designs of gun drills, it is very important to correctly set the technological parameters to maintain the stability of the cutting process. One of the most important parameters is the correct removal of heat from the cutting site, and this will be ensured by the stability of pressure, temperature, and percentage of emulsion in the cooling medium, as well as the adjustment of the geometry of the chip former. On this basis, a large number of tests were carried out, consisting of testing the number of drilling cycles carried out by new, unfluted gun drills at constant feed rates and spindle rotation frequencies. After testing, it is possible to modify and supplement the existing methodology of deep drilling technology in terms of managing the cooling emulsion and chip-forming geometry. The tests were aimed at increasing the service life and the number of possible re-grindings of the gun drills depending on changes in the percentage of the emulsion concentration, the pressure and temperature of the cooling agent, and the associated chipformer geometry.

A comparative study on the machinability of β-type novel Ti29Nb13Ta4.6Zr (TNTZ) biomedical alloys under micro-milling operation

β-type Ti29Nb13Ta4.6Zr (TNTZ) alloy is a new-generation alloy that does not contain toxic/allergic elements. The alloys have low Young's modulus (⁓60 GPa) close to the cortical bone, providing excellent biocompatibility over familiar commercial CP Ti or Ti6Al4V ELI. Different macro/micro-machining methods can be used to obtain the final shape of Ti alloys and impact on the implant's bio ecosystem and performance. This study compared the micro-mill machining performance of the TNTZ alloys with commercial CP Ti and Ti6Al4V ELI. Machining experiments were performed under similar and different cutting speeds and constant feed rate conditions. In the study, cutting forces, surface roughness, burr size and tool wear were obtained. The results showed that the Fx cutting forces for TNTZ are about 3 and 2 times higher than for CP Ti and Ti6Al4V alloys, respectively. Depending on the increasing cutting distance, the surface roughness of CP Ti and Ti6Al4V materials followed a similar trend. However, the surface roughness values for TNTZ alloy are higher and decrease with increasing cutting distance. Burr widths for CP Ti and Ti6Al4V are similar, but the milling direction at which maximum burr occurs varies. In the TNTZ alloy, the burr width is about 3 times higher, and the burr occurred inside the slot, not at the edge of the machined slot. The predominant type of damage in milling Ti6Al4V and CP Ti materials is abrasive and adhesive. The dominant damage type in TNTZ alloy is chipping. Increasing the number of revolutions in TNTZ causes the cutting forces and burr width to increase.

Optimization of cutting forces and surface roughness via ANOVA and grey relational analysis in machining of In718

Abstract Machinability and optimization are the two objectives of researchers who guide us to enhance the manufacturing industry. Examining and analyzing the parameters such as surface roughness, tool wear, and cutting force during the processing would be beneficial that are used in various fields in the manufacturing industires. This study examined the effect of cutting forces to surface roughness on the material surface. Experimental studies were carried out by using constant feed rate (0.1 mm/rev), depth of cut (1 mm), three different coolants (CO2, minimum quantity lubrication, and dry), and cutting speeds (100, 140, 180, 220 m/min). In this study, grey relational analysis modeling and analysis of relationships between F x , F y , and F z forces on the surface roughness of Inconel 718 material, which is an important alloy in aviation, is examined. The influence of machinability parameters on F top and R a was calculated using variance analysis, which determined that cutting speed was the most significant machining parameters.

The effects of laser-assisted heat treatment on warm formability of dual-phase materials

ABSTRACT In this study, the effects of local heat treatment using a low-power laser on the bending formability of DP800 sheet material were experimentally investigated. In the first step of the study, only the punch contact bending region of sheet metal was locally heated with a constant feed rate (1 mm s−1) and at different laser powers (50, 75, and 100% Watt). In the next step, the sheet material was transferred to the bending die for bending without any cooling process, and into the last stage, the sheet material was formed in different angled V-bending dies (30°, 60°, and 90°). It was observed that in heating up to 75-W power, the hardness decreased to 237 HV due to the dissolution of the martensite in the microstructure of DP material, and the springback value decreased by 39.285% due to the decrease in hardness.

The influence of GMAW correction parameters on stabilizing the deposition characteristics for wire arc additive manufacturing

The present work investigates the effects of correction parameters, viz. Arc Length Correction (ALC), Dynamic Correction (DC), and Pulse Correction (PC) on the deposition of ER70S-6 filler wire on a mild steel plate using two modes of the GMAW process, i.e., Cold Metal Transfer (CMT) and Pulsed mode. Controlling the heat input to improve the bead quality with varying correction parameters is investigated. The changes in welding current (I) and voltage (V) waveforms are explored in synchronization with high-speed arc imaging and the consequent effect on heat input, frequency, and stability of the I-V characteristics. Considering the above changes, an analysis of the influence of correction parameters on bead width, height, penetration, and microhardness is done. The variability in the above-stated weld bead properties along the length of deposition is investigated to establish a set of correction parameters most likely to provide a stable and consistent deposition. Heat input increases with increasing ALC and decreases with increasing DC and PC for a constant wire feed rate and welding speed. Bead width and penetration increase while bead height and microhardness decrease with heat input. The deviations in bead dimensions along the length of deposition directly correlate with the deviations in instantaneous heat input. The above results render the process much-needed flexibility and consistency for advanced welding and Wire Arc Additive Manufacturing (WAAM) applications.

Effect of nose radius on the chip morphology, cutting force and tool wear during dry turning of Inconel 718

ABSTRACT The machinability studies for the Inconel 718 alloy with the coated cemented carbide cutting tool having 0.4 and 1.2 mm nose radius, varying cutting speeds (65, 81, 95 and 106 m/min) with a constant feed rate of (0.15 mm/rev) and a depth of cut (0.2 mm) were conducted. The cutting force decreases with the increase in cutting speed due to the thermal softening of the work surface at a high temperature. With the increase in nose radius a decrease in the cutting force is observed due to the increase in the cutting edge of the tool. The formation of residual stress has a profound effect on the change in the tool morphology during the machining of the alloy. Furthermore, the chip analysis in terms of chip morphology is carried out in detail. The detailed tool fracture studies are conducted and are explained for the various machining processes.

Reduction of Taper Angle and Jet Trailback in Waterjet Cutting of Complex Geometries by a Revised Model of the Process Control

The high-pressure waterjet is a flexible and powerful tool for machining of high-performance products with reduced manufacturing time and costs. However, waterjet machining of complex geometries is difficult to handle because of the complication in controlling and adjusting the process. Therefore, the goal of this study is to improve a process control method to adjust the waterjet tool orientation and to optimize the waterjet cutting process in a simple and efficient manner. As a result, a method is developed which is based on constant feed rate and a distinction between concave and convex curvature of the workpiece geometry.