Electrical discharge machining

The assigned material for this week's article summary assignment is titled "Metal polishing: Do this, not that". The article is authored by CTD Mike, and was published on 06 Oct 11. The article appears on the cheaperthandirt.com website, and may be sourced at: http://blog.cheaperthandirt.com/metal-polishing-this/. The article begins with the assumption you have a task to perform that involves removing metal. Should I use the Dremel rotary tool? Stones? If you want to make sure you don't jack up the job, the Dremel should probably be put down. Unless you are extremely well versed in the proper usage of a hand rotary tool, it would behoove you to not use it. CTD Mike explains in this article that there are two types of polishing that are performed in the firearm industry. Polishing for appearance, and polishing for performance. The first should be limited to stainless steel parts, as when you remove enough metal, it becomes susceptible to rust. Polishing for performance is polishing a feed ramp, or taking a little bit off a trigger for a lighter pull. These things help the weapon in the performance of it's duty. When performing a task involving removing metal, it is imperative that you know the composition of materials you're working with. This can save you a lot of time, and frustration in the long run. Things such as damaging your equipment, damaging the work piece, and having to buy replacements to either can add up. Parts can be through hardened, or case hardened. With…

INTRODUCTION About 40% of the mechanical faults are caused by bearings in the machine using rolling bearing. Fatigue and spalling are common failure modes in the process of using rolling bearing, they mainly appear on surface of the raceway and rolling body[1]. The micro level defects in bear 's surface will affect the performance of the whole system, which requires the surface quality of the parts to be greatly improved after mechanical processing[1]. The surface quality of bearing ring has…

the uncoated carbide inserts at a feed rate of 0.1 mm/tooth, machining speed of 290 m/min and axial depth of cut of 1.3 mm. The Al7075 chips formed during milling exhibited a smooth and shiny surface, and were in a semicircular and parabolic trapezoidal wave with a small radius and a saw-tooth-form, as shown in Fig. 7 (a). Fig. 7 (b) shows the chip shapes formed during the milling of the MMCs. The composite chips had large radii, and were semi-circular helical type and saw-toothed. The SiC foam…

Machining of GFRP laminate materials is difficult due to their anisotropic and non homogeneity in nature which consist of distinctly different phases, their response to machining. Machining of composite materials is rarely avoided in view of losing the strength of components due to interlayer fracture and delamination damage. In specific situations where metal inserts are inevitable in case of joining or affixing with other mating part, in this situation milling and drilling operations can’t be…

According to cerakoteguncoatings.com (2017), Cerakote is a Polymer-Ceramic coating that can be applied to metals, plastics, polymers and wood. Cerakote is used on; knives, weapons, tools, some electronic covers, glasses and anything durable that needs a tough coating. This ceramic thin-film coating is intended to offer an appealing finish with unequaled performance. The ceramic coating of Cerakote provides the advantage of having extraordinary; adhesiveness, pliability, corrosion and wear…

than the measured one. [13] D.K Das et al. [2014] investigates the surface roughness during hard turning of EN24 of 50 HRC hardness with coated carbide insert. By using grey based Taguchi and regression analysis it was concluded that surface roughness of 0.42 micron is obtained at cutting speed of 130 m/min, depth of cut 0.4 mm/rev and feed rate was found to be most dominant parameters for output response. [14] A.K Sahoo et al. [2014] studied the performance of multilayer carbide insert in the…

Explain the typical axis conventions of the following machine tool in the form of a written report. Lathe Machine Tool Lathe machine is a machine tool that rotates the work piece on its axis to perform various operations such as cutting, sanding, knurling, drilling, or deformation, facing, turning, with tools that are applied to the work piece to create an object with symmetry about an axis of rotation. (n.d.) Typical axis conventions of the Lathe Machine tool • The work piece is…

The fear of failure is not a universally positive motivator. In some cases it is neither positive nor a motivator. Failure may be described as the eventual and inevitable by-product of the expenditure of efforts to achieve success. A fear of failure has never been anything but an abstract to me, because I do not embrace failure as an acceptable outcome. Success may be attained by researching methods to achieve an action or by avoiding problems through observing failures of other people. In…

Curt Phillips MEC 113 Project Screwdriver A screwdriver is a hand tool which is considered to be used as a hand-operator to unloose a screw with slotted heads. The first characteristics for screwdriver that it is a shaped like a cross, and has a beveled tip. The second characteristic for screwdriver that it has a tip of a flat-blade tip. It is flat and tapered, and somewhat like a chisel. The materials that are made for the handle of a screwdriver are steel, wood, metal or plastic. In…

In my career, I have used my milling science degree to start as a miller. Although I started at an entry-level position, I quickly rose up to management and research positions. With extensive research, I changed the way that we mill by producing flour in a more efficient manner. Also applying what I learned In my CAD Flow Sheets for Grain Processes class, I was able to offer more suggestions on how to lay out a plant more effectively. By doing these, the cost of production was reduced for the…