1. Chapter-1
Introduction
1.1 Introduction: -
• A Hobbing is a machining process for gear cutting, cutting splines, and cutting sprockets on a hobbing machine, which is a special type of milling machine. The teeth or splines are progressively cut into the workpiece by a series of cuts made by a cutting tool called a hob. Compared to other gear forming processes it is relatively inexpensive but still quite accurate, thus it is used for a broad range of parts and quantities.
• It is the most widely used gear cutting process for creating spur and helical gears and more gears are cut by hobbing than any other process as it is relatively quick and inexpensive.
• Hobbing is one of the most fundamental processes in gear manufacturing. Its productivity
Electricity problem
2. Improper tool post movement
3. Bed and lead screw movement is not proper
4. Insufficient lubrication
1.2 Aim and objectives: -
1. To get familiar with basic operations of Gear Hobbing machine.
2. To know the theoretical and practical concept of Gear Hobbing machine.
3. To learn basic concept of Gear Hobbing machine.
4. To understand the basic working principle of Gear Hobbing machine.
1.3 Elements of Gear Hobbing machine: -
All gear hobbing machines, whether mechanical or CNC, consist of five common elements, which are listed below.
• A work spindle to rotate the work piece
• A cutter spindle to rotate the cutting tool, the hob
• A means to rotate the work spindle and cutter spindle with an exact ratio, depending on the number of teeth of the gear and the number of threads of the hob
• A means to traverse the hob across the face of the work piece
• A means to adjust the center distance between the hob and work piece for different size work pieces and hobs
1.4 Specifications of Gear Hobbing machine: -
CAPACITY
Maximum dia. of spur gear 18
Minimum dia. of spur gear 0.5
Maximum modul 5
Maximum travels of Hob slide 10
Maximum helical gear cutting 45 deg. L.H./R.H
Diameter of Work Table 16
Work Table bore
First of all for start working on project, we lubricate all parts of the machine and then contact with our faculty guide to get specification of the Gear Hobbing machine.
4.2 Snapshots & Images: - Fig. 6 – Gear Hobbing machine front view Fig. 7 – Gear Hobbing machine back view Fig. 8 – Gear Hobbing machine LHS view
Fig. 9 – Gear Hobbing machine RHS view
5. Chapter-5
References
(1) Manufacturing Reference books:
American Society for Metals; Cubberly, William H.; Bardes, Bruce P. (1978), Metals Handbook: Machining
Endoy, Robert (1990), Gear hobbing, shaping, and shaving, Society of Manufacturing Engineers
(2) Website search:
https://www.geartechnology.com/articles/0313/How_Gear_Hobbing_Works/
https://en.wikipedia.org/wiki/Hobbing
https://www.youtube.com/watch?v=dACKfxJ8qr4
6. Chapter-6
Conclusion
We maintain this machine to future acknowledgement to the student to get the basic knowledge of manual gear hobbing machine. This machine is not properly working therefore we chose this machine as our project maintenance of Gear hobbing machine of our College
* The primary purpose of the clutch is to smoothly transmit power from the engine to the jackshaft and to remove the connection when the engine is idling so that the machine is not always rolling.
Braham, Jones. “Keep Your Eye on the Bat.” Machine Design 63.13(1997). 29 Mar. 2002 http://newfirstsearch.oclc.org
...icycles, and heavy duty industrial machines all rely on common gears, and without different types of gears we wouldn’t be able to live in the modern society that is today. We know how they've helped us build modern civilization; it'll be exciting to see what they help us accomplish in the future.
- The plumb bob was used to locate the centre of the trip plate , to
Specifically, on a standard five speed, the gears are as follows: Neutral is located in the middle of the panel. From neutral, gears must be changed accordingly. First gear is found to the far upper left, and is used to get the car moving from a stopped position. Down left is second gear, used for speeds up to twenty-five miles per hour. Third gear is located upper middle of the panel, used for speeds from about twenty-five to forty miles per hour. Fourth gear is found at the lower middle and would be good for between forty and fifty miles per hour. Fifth gear is found to the far upper right, and is used for higher driving speeds such as on the freeway. Last but not least is reverse, which is to the far bottom right, used for backing up. These gears must be maneuvered the exact same way each time the automobile is driven.
Scherbius’s first model was big, bulky, and had a keyboard from a typewriter to input code. Four geared wheels drove four rotors. The four wheels drove one rotor ea...
To start my project we first had to buy some supplies such as vinyl pads, rubber tips, 3ft long and ¾ in. wide dowelling and a 3ft, 1 ¼ in wide handrail. Then, we began making my cane. First, my grandpa explained to me what a table saw is and then demonstrated how I would be using it to make my handle. The first thing we did was set the miter gauge at 90 degrees and put a magnet block on the table vertically from the miter gauge and 4 ¼ in away. Now we turn the saw on. I have to firmly hold the handrail against the miter gauge and slide it over until it is against the magnet block. Next I slowly slide the miter gauge and handrail up going past the magnet block and then over the blades. Once my handrail is cut I can turn off the blades. After that we head over to the stationary sander with my 4 ¼ in handle. Before starting my grandpa instructs me on what it does, why we will be using i...
Anybody and everybody can become an industrial machinery mechanic; especially, those who are passionate about getting their hands plastered in motor oil, grease, and other mechanical lubricants. These people will more than likely be ecstatic about getting into industrial machinery mechanics. They need to be able to put in one hundred ten percent of their effort into becoming an industrial machinery mechanic. An industrial machinery mechanic’s overall objective on the job is to stop a mechanical error before it happens. An industrial machinery mechanics are often caught repairing, maintaining, and fabricating machinery.
Hubbell Incorporated is a company in the manufacturing industry that primarily produces a wide variety of electronic and electrical products. Initially Hubbell Incorporated offered a specialized stand that was accompanied with a moveable cutter. The cutter was used in the retail world primarily for wrapping items. The product was a very successful product because it is still used by companies today. A few years after inventing the specialized stand with a moveable cutter, the owner of Hubbell invented a tapping machine. The tapping machine was so efficient in the era that it was invented that there was a very large demand for the product from manufacture companies. The products that Hubbell produce has changed a bit over
Group which is a leading supplier of engine, transmission and suspension parts, assemblies and systems with operations in India, Germany, UK and USA. The group is amongst the largest manufacturer of flywheel ring gears in the world and one of the
is connected to a shaft, which spins a disc. The disc has holes in it
These reels usually have a series of gears that turn the line collecting devices several times for each crank of the handle.
Therefore, to determine the material handling system is very important for reduce cost and increased profits. The fact material handling systems represent a major part of the total manufacturing cost make necessity to choose adequately the material handling system when a manufacturing system is designed. One of the most successful applications of experts systems is selection of equipment for material handling (SEMH). SEMH lookups the knowledge bottom to be able to suggest the degree associated with mechanization, and also the type of product coping with equipment to become utilized, according to some traits. Fisher, Farber, and Kay (1998) have introduced MATHES: material handling equipment selection expert systems for the selection of a material handling equipment from 16 possible choices. MATHES as well as 172 principles takes course, product stream quantity, product sizing's in addition to distance concerning sectors because variables. Swaminathan, Matson, and Mellichamp (1992) have developed EXCITE: expert consultant for in-plant transportation equipment addressing 35 equipment
Woodman, Chester L., Kurt Kuster. ?Small shop, big decision.? American Machinest (Apr. 2001): 78 EBSCOhost. Online. Nov. 2002 .
The introduction of machinery initiated the Industrial Revolution making factories an important way of life. The machinery in factories used the pow...