reaming n tapping
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1) The document discusses reaming and tapping manufacturing processes. Reaming is used to improve the accuracy and surface finish of drilled holes. Tapping is used to cut internal threads using a threading tool called a tap. 2) It describes different types of reamers and taps. Reamers have cutting edges that remove a small amount of material to size holes. Taps have multiple cutting teeth and come in tapered, bottoming, and collapsible styles for different applications. 3) Reaming and tapping can be done by hand or with machines like drilling machines, lathes, screw machines, and milling machines.
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NextPCB provides PCB manufacturing capabilities including up to 16 layer boards with minimum line widths starting at 3 mils. They have tolerance specifications for hole drilling and sizing. Surface finishes include HASL and ENIG. Board thicknesses range from 0.4-3.0mm with thickness tolerance of ±10%. Design guidelines include minimum letter sizes of 0.15mm high by 1mm wide and an aspect ratio of 1:5. Material is usually FR-4.
Gurme santoshkumar
This document provides various points for civil site engineers to remember regarding construction quality and standards. It includes guidelines on reinforcement spacing and sizing, concrete proportions, material properties, curing times, formwork removal times, and required concrete testing based on quantity. Key points are maximum chair spacing of 1 meter for reinforcement bars up to 36mm diameter, longitudinal reinforcement between 0.8-6% of gross cross-section, minimum slab thickness of 125mm, and required curing times of 7-14 days depending on cement type used.
Broching tool
Broaching is a machining process that uses a broach tool to remove metal. A broach tool has a series of cutting teeth arranged from rough to fine. Each tooth removes a small amount of material. Broaching can machine internal or external surfaces in a single pass. Common applications include cutting keyways, splines or holes. Broaching is well-suited for mass production due to its high accuracy, surface finish and efficiency at removing metal in one pass of the broach tool. However, broaching is limited to machining through-holes and surfaces, and designing and manufacturing broach tools can be complex.
drilling rig components
This document provides information about Beijing Dazheng yongye Construction Machinery Co., LTD, including their contact information, website, and products. Specifically, it details the company's drilling buckets, drilling augers, and kelly bars. It provides specifications, dimensions, materials, and applications for their different types of drilling buckets, augers, and kelly bars.
Drilling rig components
This document provides information about Beijing Dazheng yongye Construction Machinery Co., LTD, including their contact information, website, and products. Specifically, it details the company's drilling buckets, drilling augers, and kelly bars. It provides specifications, applications, features, and technical details for their different types of drilling buckets, augers, and kelly bars.
Luckystar Company Profile-Lisa
Luckystar PCB is a professional PCB manufacturer with two factories in Shenzhen and Dongguan, China. It has over 1100 employees across the factories. The Shenzhen factory focuses on small to middle volume orders while the Dongguan factory produces metal base PCBs. Luckystar provides one-stop PCB solutions from design to manufacturing to sales. It offers PCB capabilities such as 2-18 layer boards, various materials, miniaturized features, and high volume production.
Ashok leyland
This document summarizes the skin panels used for the DOST vehicle model manufactured by Ashok Leyland. It discusses that the 14 skin panels are stamped from steel sheet metal ranging from 0.7mm to 1.6mm thickness using a press line from FAGOR that applies 670 KN of force. The major defects that can occur include dents, peaks, wrinkles, welding damage, and cracks, which are inspected using tools like an oil stone, vernier caliper, and coordinate measuring machine.
UNCONVENTIONAL MACHINING PROCESS
This document provides an overview of ultrasonic machining (USM). It explains that in USM, a tool oscillated at ultrasonic frequencies (around 20 kHz) with abrasive particles in the gap between the tool and workpiece. The abrasive particles are forced to repeatedly impact the work surface due to the ultrasonic oscillations, removing material through micro-chipping. Key advantages of USM include the ability to machine hard and brittle materials precisely without producing thermal or chemical defects, while disadvantages include low material removal rates and fast tool wear. Common abrasives used include aluminum oxide and silicon carbide in a water slurry. USM is suitable for machining intricate shapes, small holes, and hard non-conductive
Grinding
The document discusses abrasive machining processes, specifically grinding. It describes how grinding uses abrasive wheels to smoothly finish surfaces and achieve high accuracy. Grinding involves removing small amounts of material using abrasive grains. Proper wheel selection depends on factors like the material, stock removal needs, required finish, and machine. There are different types of grinding like cylindrical, surface, and form grinding that produce various surface geometries and levels of precision.
class29_nontraditional machining.ppt.pptx
Grinding uses abrasives which are small, hard particles having sharp edges (but irregular shapes).
Small amount of metal can be removed as tiny metal chips
Machine heat treated parts
Ceramic, glass
Weld beads
Semi-machined die surfaces
Temperature rise
Very high temperature (3000oF)
Chips carry away the heat
Larger fraction of heat is conducted into workpiece
Effect of temp rise
More pronounced than metal cutting
Excessive temp rise caused by grinding can temper or soften hardened metal
Grinding wheels are made of abrasive powder such as
Aluminum Oxide (Al2O3)
Silicon Carbide (SiC)
CBN, Diamond, etc.
Cutting edges are extremely small.
Grain size is measured as grit size (100 – fine, 500 – very fine)
Grinding wheels have thousands of abrasive cutting edges
Several types of bond is used to hold abrasive grains
Vitrified, Resinoid, Rubber, Metal bonds
Differences between single point cutting and grinding
Individual grain has an irregular geometry and is spaced randomly along the edge.
Radial position of the grains vary
Rake angle is negative (-60o), Shear angle is low.
Cutting Speed is very high (6000 ft/min)
Burning- surface burning can occur (blemish color / oxidation)
Metallurgical burning can also occur – Martensite formation in high carbon steel
Thermal cracks
Residual Stresses
Temp change and gradient within the workpiece cause it.
Plastic deformation due to sliding of wear flat
Abrasive Jet Mechaning (Modern Manufacturing Process
The document discusses abrasive jet machining (AJM), which uses a high-pressure stream of abrasive particles mixed with a carrier gas to erode material from a work surface. Key variables that influence the machining rate and accuracy include the carrier gas, abrasive type and size, jet velocity, work material properties, nozzle design, and number of abrasive particles. AJM works best for brittle materials and thin sections that are difficult to machine via other methods, though ductile materials are difficult to machine using this process. Applications include deburring, cleaning, cutting glass and ceramics.
1 endodontic armamentarium.pptx
This document provides an overview of various instruments used in endodontics. It discusses basic instruments such as mouth mirrors, endodontic spoons, and tweezers. It also covers instruments for access cavity preparation like handpieces, burs, and Gates Glidden burs. The document focuses in detail on instruments used for cleaning and shaping the pulp space. It describes classifications of these instruments and discusses files, reamers, broaches, and newer file designs like K-flex, triple flex, and flex-R files made of different materials. Standardization and modifications of endodontic instruments according to ISO guidelines are also summarized.
PCD End mills and pcd ball nose end mills from halnn
This article share you PCD End Mills from Halnn Superhard.
It includes PCD Helical End Mill with 1-Flute and souble flute, pcd ball nose end mills and some special pcd tools.
Any
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reaming n tapping
- 1. Tuesday. 16 oct 2012 EPT 282 MANUFACTURING PROCESS 11 RINA ERYANI BT MAHALI. 111051636.
- 2. Tuesday 16 oct 2012 what is > Reaming. > Tapping. (o_0)????
- 3. Tuesday 16 oct 2012 REAMING AND REAMERS. * Reaming operation is used to: a) make an existing hole dimensionally more accurate that can be achieved by drilling alone. b) improve its surface. * Most accurate holes in work piece generally produced by: a) centering. b) drilling. c) boring. d) reaming.
- 4. Tuesday 16 oct 2012 Reamer. * A multiple cutting edge tool with straight or helically fluted edges that remove very little material. * For soft metal, reamers removes a minimum 0.2mm on a diameter of a drilled hole. * For harder metal about 0.13mm is remove. * Hand reamers are straight or have a tapered end in first third of their length. * Various machines reamers are: - rose reamers. - fluted reamers. - shell reamers. - expansion reamers. - adjustable reamers.
- 5. Tuesday 16 oct 2012 TAPPING AND TAPS. * Tapping can produced internal threads. * Tap is a chip producing threading tool with multiple cutting teeth. (available with 2, 3 or 4 flutes.) * Types taps: 1) tapered taps. - designed to reduce torque required for tapping of through holes. 2) bottoming taps. - for tapping blind holes to their full depth. 3) collapsible taps. - used in large diameter holes.
- 6. Tuesday 16 oct 2012 Tapping * For higher tapping productivity drilling and tapping can be combined in single operation (drapping) with single tool. * Tapping can be done by hand or machines such as: a) drilling machines. b) lathes. c) automatic screws machines. d) vertical CNC milling machines.
- 7. Tuesday 16 oct 2012 Finish. ..Thank you..