12.19 shows three types of lathe dogs commonly used. Work holding and supporting is an important aspect of an engineer. WORK HOLDING DEVICES: FOR LATHE, DRILLING AND SHAPER MACHINES, CLASSIFICATION AND DETAILING . What will I discuss?? The work may be roughed by feeding from the centre hole outward or from the circumference toward the centre. is the uber premium method of holding stock on the lathe. Now customize the name of a clipboard to store your clips. . It is the most important device for holding the workpiece, particularly of short length and large diameter or of irregular shape which can’t be conveniently mounted between centres. It is important to ensure that during facing operation the cutting tool point is not damaged by running it into the centre point. 12.36). They are either electrically operated or are of permanent magnet type. Also, an option for adding Cole Jaws is important. Shape of Slideways: With Diagram | Machine Tools | Industrial Engineering, Unconventional Machining Processes: AJM, EBM, LBM & PAM | Manufacturing, Material Properties: Alloying, Heat Treatment, Mechanical Working and Recrystallization, Design of Gating System | Casting | Manufacturing Science, Forming Process: Forming Operations of Materials | Manufacturing Science, Generative Manufacturing Process and its Types | Manufacturing Science. Collets are furnished in sets. All the work has to be held properly for machining. Workpiece mounted in this manner should be checked for mounting accuracy. Work holding devices of lathe Name : Vedant D. Rajput Enrolment no. Fine Woodworkers of Austin The other end is threaded and has a key way to prevent the collet from turning in the collet sleeve. Standard work holding devices used in lathe operation are: 1. It thus supports the work opposite to the tool and counteracts the cutting forces. A good method helps in achieving economy and efficient manufacturing. Click on any image to see a larger version. Content Filtration 6. A good method helps in achieving economy and efficient manufacturing. The finishing cut is made from the centred hole outward. Lathe Centres 3. He also teaches for TechShop. The length of this flat surface should be greater than the amount of the cross-feed per revolution of job. Collar (provided with solid collars. Here are just a few that I use: There are many other useful devices that hold or support stock on the lathe including pen turning mandrels, offset chucks, collet chucks, spindle steady rests and pin chucks. Chucks Curtis teaches and demonstrates nationally for Lie-Nielsen Toolworks. It does not make sense to me to mount a heavy out of round blank and expect to hog out material on a cheap chuck. Collets 4. To obtain a smooth finish the point of the side tool is slightly rounded with an oilstone, or so ground as to present a short flat surface to the work. Clipping is a handy way to collect important slides you want to go back to later. v. Cone (used for workpiece of different hole diameters). The collet fits and is drawn into the sleeve by a hollow draw bar that fits through the spindle. Take a look at his website at vii. (Refer Fig. Plain (suitable for one size of bore).
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