Posted in Engineering Drawing

Drawing Instruments and Accessories

Introduction Drawing Instruments and Accessories. Engineering drawing is a two dimensional representation of three dimensional objects. In general, it provides necessary information about the shape, size, surface quality, material, manufacturing process, etc., of the object. It is the graphic language from which a trained person can visualize objects. Drawings prepared in one country may be utilised in any other country irrespective of the language spoken. Hence, engineering drawing is called the universal language of engineers. Any language to be communicative, should follow certain rules so that it conveys the same meaning to every one. Similarly, drawing practice must follow certain…

Posted in Metal Working Principles & Procedures

Standard Designations and Marking System of Metals

Knowledge of the standard designations of metals and the systems of marking metals is necessary so that you can select the proper material for a specific job. The standard designations discussed in this chapter are index numbers that are used to indicate the composition of the various metals. The two major systems used for iron and steel are those of the Society of Automotive Engineers (SAE) and the American and Steel Institute (AISI). The Aluminum Association method is used for aluminum. Other nonferrous metals we designated by the percentage and types of elements in their composition. FERROUS METAL DESIGNATIONS. You…

Posted in Metal Working Principles & Procedures

Properties of Materials

The physical properties of a metal or a plastic determine its behavior under stress, heat, and exposure to chemically active substances. In practical application, behavior of a material under these conditions determines its mechanical properties, indentation, and rusting. The mechanical properties of a material. therefore, are important considerations in selecting material for a specific job. The following information concerns metals. Plastics are discussed later in this chapter. Stress is the amount of internal force with which a material resists a change in shape. Strain is the deformation or change in shape that is caused by an applied load. Strength is…

Posted in Computer Numerical Control

Advanced Curve Machining Method for 5-Axis CNC Machine Tools

A new method for curve machining on 5-axis CNC machine tools is proposed in this paper. It uses the CNC interpolator approach, or called curve interpolator, which can produce accurate tool position as well as tool orientation. The interpolator calculates a new command in real time, the same time period needed for sampling the control-loop feedback devices. It performs two steps in each sampling period: (1) trajectory planning based on a constant feedrate and (2) inverse kinematics transformation based on the structure of the machine. To implement this curve interpolator, a 3-D parametric curve g-code must be defined for 5-axis…

Posted in Computer Numerical Control

Applications of Computer Numerical Control (CNC) Machine in Manufacturing Industries

In today’s scenario you will find lathe machine in almost all industries, workshops and even on road side small scale workshops or repair shops for heavy vehicles. CNC lathe machines are also not an exception to this. There is hardly any aspect of manufacturing that is not handled by the automated CNC machine. It’s a must know for everyone who are involved in the manufacturing industry, what a CNC machine can do for their corporation. Because of broad applications of CNC machines in different industries, there is a great pitch in the demand of the CNC machine programmers. In order to fulfill…

Posted in Search Engine Optimization

How to Make Use of Free Webmaster Tools for SEO

Make Googlebot crawling smoother by using Webmaster Tools Major search engines, including Google, provide free tools for webmasters. Google's Webmaster Tools help webmasters better control how Google interacts with their websites and get useful information from Google about their site. Using Webmaster Tools won't help your site get preferential treatment; however, it can help you identify issues that, if addressed, can help your site perform better in search results. With the service, webmasters can: see which parts of a site Googlebot had problems crawling notify us of an XML Sitemap file analyze and generate robots.txt files remove URLs already crawled by…

Posted in Search Engine Optimization

How to Promote Your Website in Right Ways for Better SEO

About increasing backlinks with an intention to increase the value of the site While most of the links to your site will be gained gradually, as people discover your content through search or other ways and link to it, Google understands that you'd like to let others know about the hard work you've put into your content. Effectively promoting your new content will lead to faster discovery by those who are interested in the same subject (1). As with most points covered in this document, taking these recommendations to an extreme could actually harm the reputation of your site. (1) Promoting your site and having quality links could…

Posted in Search Engine Optimization

How to Guide Mobile Users Accurately for Better SEO

Running desktop and mobile versions of your site One of the most common problems for webmasters who run both mobile and desktop versions of a site is that the mobile version of the site appears for users on a desktop computer, or that the desktop version of the site appears when someone accesses it on a mobile device. In dealing with this scenario, here are two viable options: Redirect mobile users to the correct version When a mobile user or crawler (like Googlebot-Mobile) accesses the desktop version of a URL, you can redirect them to the corresponding mobile version of the same page. Google notices the relationship between the two…

Posted in Search Engine Optimization

How to Get Mobile Sites Indexed in Google

Notify Google of mobile sites Configure mobile sites so that they can be indexed accurately It seems the world is going mobile, with many people using mobile phones on a daily basis, and a large user base searching on Google’s mobile search page. However, as a webmaster, running a mobile site and tapping into the mobile search audience isn’t easy. Mobile sites not only use a different format from normal desktop sites, but the management methods and expertise required are also quite different. This results in a variety of new challenges. While many mobile sites were designed with mobile viewing…

Posted in Search Engine Optimization

How Does rel=”nofollow” Links Affect Your Site SEO

Be aware of rel=”nofollow” for links Combat comment spam with “nofollow” Setting the value of the “rel” attribute of a link to “nofollow” will tell Google that certain links on your site shouldn’t be followed or pass your page’s reputation to the pages linked to. Nofollowing a link is adding rel=”nofollow” inside of the link’s anchor tag (1). [php]<a href="http://www.shadyseo.com" rel="nofollow">Comment spammer</a>[/php] (1) If you or your site’s users link to a site that you don’t trust and/or you don’t want to pass your site’s reputation, use nofollow. When would this be useful? If your site has a blog with public commenting turned on, links…