Studying of Technological Characteristics in Cutting Zone by Multifunction Measuring System (original) (raw)
Related papers
2006
The development of computer aided research systems, used for experimental measuring of the temperature in the cutting process, forms conditions for decreasing of the measuring uncertainty. This paper describes new monitoring system for temperature measuring in the machining with turning. A method of the nature thermocouple has been used for measuring the temperature. A specially constructed device transmits the voltage signal from the workpiece side and a reconstruction of the cutting insert holder provides the transmition of the voltage signal from the cutting insert. The transfer of the generated thermocouple voltage to the personal computer is done by original interface, which consists of amplifier and A/D converter. An application that was created in Microsoft Visual C++ 6.0 receives the data and displays the curves of the thermocouple voltage that is generated in the cutting process.
Researches regarding cutting tool condition monitoring
MATEC Web of Conferences, 2017
The paper main purpose is monitoring of tool wear in metal cutting using neural networks due to their ability of learning and adapting their self, based on experiments. Monitoring the cutting process is difficult to perform on-line because of the complexity of tool wear process, which is the most important parameter that defines the tool state at a certain moment. Most of the researches appraise the tool wear by indirect factors such as forces, consumed power, vibrations or the surface quality. In this case, it is important to combine many factors for increasing the accuracy of tool wear prediction and establish the admissible size of wear. For this, paper both the theoretical data obtained from FEM analyze and experimental ones are used and compared in order to appreciate the reliability of the results.
Monitoring System for Automation of Experimental Researches in Cutting
MECHANICAL …
Маш. инж. науч. спис. Год. Број стр. Скопје Тираж: 300 Copies: 300 Цена: 520 денари Price: 520 denars Адреса Address Машински факултет Faculty of Mechanical Engineering (Машинско инженерство-научно списание) (Mechanical Engineering-Scientific Journal) Одговорен уредник Editor in Chief пошт. фах 464 P.O.Box 464 МК-1001 Скопје, Република Македонија MK-1001 Skopje, Republic of Macedonia Mech. Eng. Sci. J. is indexed/abstracted in INIS (International Nuclear Information System) www.mf.ukim.edu.mk
Advanced process monitoring and analysis of machining
Sort, 2006
This concept is based on a sensor and analysis platform for characterisation, measurement, monitoring and control of the machining system, machining process and machined product. Little research in such comprehensive, cooperative manner has been done at this level up to date. Tackling this complex research task has been facilitated through the cooperation Cutting speed, the speed that the tool moves through the workpiece Feed rate, how much the tool moves, relative to the workpiece, during a full rotation of the tool Axial depth of cut, distance from the workpiece surface to the tool tip, i.e. the thickness of the layer removed in one cut. Radial depth of cut, amount of tool diameter that is engaged, i.e. width of one track of removed material 4.1.3 Milling methods Milling offers several techniques of producing a part depending on the geometry wanted, as shown in Fig 8(a)-(d). Each of these methods can be performed with a variety of different tools, as shown in Fig. 8. The choice of the tool depends on the combination of the material and geometry of the workpiece and the machine itself. 4.2 State-of-the-Art of the Machining Process The machining process consists of several steps to manufacture a part from a work piece. The process starts with the modelling of the part that is desired. For this a PC or workstation is used together with an appropriate Computer Aided Design (CAD) software. The research within this area is mainly concentrated around the collaboration between the design and the construction, i.e. the design department loose-fit models and the construction department K r = 90º h ex f z a e D c h m 5.2.4 Monitoring of machining Although the above illustrative example concerns monitoring and control of the quite different process of laser cutting, much of the basic method is valid and similar for machining. An essential difference is the type of sensors used. As being a thermal process, As the cutting force is the most important variable to have control over, most research is done around this, as shown in the work done by Byrne et al. [32] in 1995. He reviews 188 articles and sorts them in method and sensor type. Bryne thoroughly describes both the method and the sensor. A lot of research is also carried out with acoustic emission sensors, but force sensors are still the most popular type.
Relationship Between Measurement of Cutting Force and Sensor Location in Turning Process
Turning process is widely used in the production of components for automotive and aerospace applications. The machinability of a work material is commonly assessed in terms of cutting tool life, surface finish, and cutting force. These responses are dependent on machining parameters such as cutting speed, feed rate, and depth of cut. In this study, the relationships between cutting force, cutting speed, and sensor location in the turning process were investigated. Strain gauge was chosen as the sensor for the detection of cutting force signal during turning of hardened plain carbon steel JIS S45C. Two strain gauges were mounted on a tool holder at a defined location of I, II, or III at a distance of 37, 42, or 47 mm, respectively, from the cutting point. Only one set of machining experiments was conducted at spindle speed = 1000 rpm, feed = 0.25 mm/rev, and depth of cut = 0.80 mm. The turning process was stopped and the insert was discarded when average flank wear reached 0.30 mm. The main cutting force and the feed force for each cycle measured by the strain gauges at location I, II, and III were collected and analyzed. Results show that when cutting speed was increased, the main cutting force and the feed force were decreased accordingly. The change of was inversely proportional to the change of cutting speed, but the did not decrease continuously and behaved contrarily. A strain gauge placed at a distance of approximately 43 mm from the cutting point was found to be the best and most suitable for sensing accurate force signals.
Measurement of Cutting Temperature during Machining
In metal cutting, heat generated on the cutting tool tip is important for the performance of the tool and quality of the finished product. The effect of the cutting temperature, particularly when it is high, is mostly detrimental to both tool and work piece. The machining and tool life can be improved by the knowledge of cutting temperature on the tool tip. In this mini project we are evaluating the variation of different parameters on cutting temperature. We are setting up an experiment to measure the temperature developed on tool tip, during turning operation in a center lathe, under different parameters. The metal cutting parameters considered are cutting speed, feed rate and depth of cut. In this experiment we are using an assembly of k-type thermocouple and multimeter for measuring the temperature. The tool used is of high carbon tip, cast iron shank and work piece is mild steel cylindrical rod. Mild steel work piece is used because it has large variety of applications like worms, gears, machine parts, components of tool die set, tool holder etc. From the data collected during the experiment, we can understand the effects of different turning parameters on temperature developed on tool tip and suitable turning conditions for obtaining maximum material removal rate at lower temperature. The results obtained are tabulated and analyzed graphically.
Cutting Process Parameters Measurements by Means of Com-Puter Vision
Proceedings of 10th World Congress on Computational Mechanics, 2014
The objective of this work is to use computer vision techniques, adopting the experimental research as a methodological approach to measure cutting process parameters. This work will present the measurement of cutting time and the passive times during turning process. This proposal can be easily justified because cutting process optimization is a complex task. The measured results will be use to minimize costs and maximize production. All the measurements will be happen in shop floor online with the process evolution. The cutting time and the passive times involved during the cutting process is essential to allow the cutting parameters optimization.
Process Monitoring and Control of Machining Operations
Electrical Engineering Handbook, 2001
This paper presents process monitoring and control of machining operations. In this work, a cutting dynamometer mounted on the machine was used to measure the cutting force, cutting speed and the power consumed in the operation. The tool life was also calculated using the Taylor's equation. It was shown that when the cutting tool lifetime elapse, the tool no long give a good cut which imperatively indicates a deteriorating condition of tool life and possible failure.
2017
In many manufacturing processes particularly during metal removing processes, it is sometimes desirable and often necessary to have information on the quantity of heat produced and therefore the increase in temperature and its distribution, heat generated at the tool-workpiece interface during machining is an important factor to solve the metal cutting problems such as dimensional accuracy, the surface integrity and the life of the tool. In the present work, the evolution of the cutting temperature was studied using a combined experimental and numerical approaches; the thermocouple method was used to measure the cutting temperature for turning operations of the steel AISI 1060. 3D cutting model was used to simulate and predict the thermal phenomenon of the heat propagation in the cutting tool, using digital COMSOL simulation software. Based on a comparison between the results of two approaches; numerical and experimental, it was found a correspondence to go up to 96%, taking into ac...
The Measurement of The Three Components of The Cutting Force During The Turning Process
International Journal of Engineering and Management Sciences
We carried out the measurement of the three components of the cutting force as a function of the modification of the depth of cut during the longitudinal turning process. The results show that if we increase the depth of cut, all three components of the cutting force shows increasing tendency, regardless of how much the cutting speed and feed speed were performed during the measurements [1] [2] [3] [4].