A Brief Note On Electrical Discharge Machining ( Edm )

The rationale behind selection a literature review as study methodology, because the literature review method help to demonstrate and describe current knowledge

The objectives and scopes of the research are also defined. This chapter also describes the methodology to carry out and accomplish the objectives.

The different gases produce a different weld because of the way the electricity flows through the arc contacting the base metal

In the literature review, process and develop a conceptual framework of the issue or problem that is being researched. This section should present a comprehensive review of the historical and current literature on the topic. The literature review should:

Figure ‎3 13 : A photo and SEM micrographs of flank face; (a) a photo of flank face and tool wear region (b) SEM micrograph of flank face; a micro fracture is shown (c) highly magnified flank face shows some holes and scratches probably caused by TiC particles and a smooth adhered layer which has covered the scratches and grooves. It can be seen that the sharp cutting edge of an unused tool has been chamfered after 1 second of machining and has left a sheared surface at the wear land.

In order to accomplish this objective, weight assigned are W1= -0.1, W2=0.25 and W3=0.65. As in Table 5 and in Fig. 3, the optimal machining parameters predicted using SA are work speed (Vw= 51.15 m/min), feed rate (f = 16.30 mm/min) and depth of cut (d = 0.01 mm) for a minimum surface roughness of 0.476µm. For these parameters the roundness is found to be 0.028mm with a material removal rate of 20.34mm3/min.

DeWalt prides itself in provide durable and efficient power tools to it's customers, and this manufacturer values customer satisfaction above all else. DeWalt spends a considerable amount of time researching the most effective operating practices where their tools are concerned.

David has a large collection of tools and equipment that I have never been able to use until now. My personal favorite is the power hammer. Firstly I want to say that everything we do is handmade and the tools used by no means take away from that they simply open new doors that allow us to do things that otherwise would be impossible or highly improbable to do. The power hammer hits hard and fast, it is really only used for projects involving large pieces of steel, but with it I can accomplish in one heat what would have taken me hours to do with the help of someone else. There are also modern welding tools, a plasma cutter, and electric sanders. Even with the modern power tools many things simply have to be done by hand or they do not turn out well. A forge weld for example is so much better than any kind of weld using modern equipment. When something is forge welded the two surfaces actually get hot enough they are becoming liquid, then they are forced together to become one piece. The plasma cutter is fast and easy, but it leaves rough edges and is easy to mess up without lots of practice, so for some things we have different manual shears that allow more control and cleaner cuts. Sadly the one thing that so far there just seems to be no power tool that can completely take the place of in the shop is sanding and filing by hand. A knife depending on what kind it is can be beaten and shaped in

The first process examined uses the Lablond Lathe machinery and requires a machined diameter of 7.7250, plus tight tolerances of + .0005 inches. A Process Capability Ratio (Cpk) analysis of the lathe’s data, results in a Cpk of .379 (exhibit A). A result of less than one indicates the machine is not capable of matching the tolerances laid out in the IMS spec. Therefore the Lablond Lathe is not suitable to handle the process it is being used for. Before a more suitable machine is selected, the Lablond Lathe should be checked for calibration, as should the measuring equipment used. If all fall within calibration specs, new

The researchers in the beginning of the article discuss their literature review in order to inform the reader on the subject. Here, they use data from an array of sources, ranging from the current and primary sources, organizing

The literature review outlines what is known about the topic, Identify what remains to be known about the topic and suggest how your research will help advance knowledge to address the problem. This serves as the basis of your RATIONALE which justifies what the researcher does.

For example, joining of common metals like aluminium, magnesium and copper material for tool used is hot work tool steels such as H13 subsequently hardened as it has got high thermal fatigue resistance, wear resistance and toughness. In the same way, following table shows the commonly used tool materials for various base metals and thickness.

The program is loaded and finally an operator runs a test of the program to ensure there are no problems. This trial run is referred to as "cutting air" and it is an important step because any mistake with speed and tool position could result in a scraped part or a damaged machine. There are many advantages to using CNC Machining. The process is more precise than manual machining, and can be repeated in exactly the same manner over and over again. Because of the precision possible with CNC Machining, this process can produce complex shapes that would be almost impossible to achieve with manual machining. CNC Machining is used in the production of many complex three-dimensional shapes. It is because of these qualities that CNC Machining is used in jobs that need a high level of precision or very repetitive tasks. Other than that, there has some problem that always occur in CNC machine such as electrical fault, parameter issues, door and safety interlocks and others. If you are considering a career in CNC Machining, it would be useful to have a background in mathematics, industrial arts and mechanical drafting, as well as computer usage. There are many common problem of CNC Machining such as the material burns on outside edge, the material burns on outside edge, the material burns on internal corners of mould, the tool is burnt, burnt edges of holes, raised mark along edge of moulding, rough edge, cutter marks visible, component moves sideways and component not the correct

CNC machining it works particularly well for hard, relatively brittle materials like steels and other metal alloys to produce high accuracy parts with well-defined properties and normally be more homogeneous and predictable in quality.

A review of the literature provides more detailed information on the chosen topic. Its purpose is to give the researcher knowledge that will form the foundation for his or her study and therefore, the information must be related to the topic. Not only does it provide basic information on the variables in the topic but also covers various relatable studies conducted in the past; how, where they were conducted, and the conclusions that the researcher(s) came to. Literature can be obtained from a wide variety of sources; newspapers, journals, databases, books, encyclopedias, digital sources, and much more. Information obtained in this section helps the researcher understand the magnitude of the problem defined in the first stage, recognize any consequences and gaps that other researchers may have not filled, and identify potential strategies to combat the problem. It serves as a secondary source of information. Based on