Mechanical Engineering Experiment: A Lab Report On Mechanical Engineering

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Table of Contents: Abstract: 2 Apparatus Used In The Experience: 3 The procedure: 6 Discussion of the results: 7 Introduction on CNC machines: 8 Discussion: 9 Conclusion: 10 References: 11 Abstract: In this lab session, we were given an idea on how a mechanical engineer works and thinks. We were introduced to the field of mechanical engineering and were given the chance to explore and use lab tools and machines. We learned how to use these tools and were assigned to an experiment in which we were supposed to drill a hole through a rectangular steel block that would fit and allow a screw to rotate smoothly and perfectly. Using different tools and equipment, we accurately measured the dimensions of the block. We used the height gauge to locate…show more content…
1) Measurement: First we had to find the point of intersection of the diagonals by measuring the height and length of the steel slab using a vernier caliper. 2) Marking: We were then given the dimensions of the height and length 2cm and 3cm respectively and we were asked to mark those dimensions on the steel slab using the height gauge. 3) Center punch: At the point of intersections of the dimensions given above we had to use a nail and hammer to punch that center. 4) Drilling: After that we were asked to drill an 8.5mm hole at that center using a special drilling machine. 5) Threading: Finally we had to tap the hole using the tap wrench to thread the hole. Discussion of the results: We measured the height and length of steel slab using the vernier caliper which might have included parallax or human error and while measuring and marking the dimensions given using the height gauge our slab wasn’t placed entirely correctly thus the center of those dimensions weren’t an exact measurement. While punching the center we did not place the nail exactly at the point of intersection of the dimensions stated so in the end our hole wasn’t exactly at the center. Finally while drilling the hole we had to hold the steel slab firmly and drill the hole slowly, due to lack of concentration we drilled the hole fast and then got an inaccurate hole, which was tough…show more content…
Using coded instructions that are sent to an internal computer, these machines enable factories to manufacture parts accurately and quickly. “It first came about after World War II as a result of the US Air Force’s desire to produce more accurate and complex parts. The modern machine’s advent can be traced back to the invention of the numerical controlled machine made by John T. Parsons. Alongside Frank L. Stulen, John T. Parsons and Stulen generated an early version of a Numerical Control (NC) machine. To further develop this machine, in 1949, Parsons turned to Gordon S. Brown’s Servomechanism Laboratory at the Massachusetts Institute of Technology (MIT). At MIT, a feedback system designed to gauge how far the controls had turned was developed. While the US Air Force halted its funding in 1953 due to expense, the project was resumed by Giddings and Lewis Machine Tool Co. who reduced expense but improved quality and efficiency.” [1] There are many types of CNC machines nowadays: CNC turning lathes, CNC milling machines, and CNC routers.

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