EXPERIMENTAL SETUP FO COLCHESTER PH The laboratory is held on a tuming poin the COLCHESTER TRIUMPH 2500 conventaal lathe

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Experimental Setup Fo Colchester Ph The Laboratory Is Held On A Tuming Poin The Colchester Triumph 2500 Conventaal Lathe 1 (41.8 KiB) Viewed 48 times

Task 1 – System presentation and turning theory
Study the experimental setup based on the information in the handout, the video and/or your on-campus observations. Get yourself familiar with the turning operation, the cutting tool, the force sensor (3D dynamometer), and the data acquisition system. Use the information in the handout, the video and information from online resources to gain more knowledge about the material of the workpiece, the tool and the components of the data acquisition chain.
In your report:
• •
Present the setup for the lab using the information you gathered from the various sources.
Present the orthogonal cutting model for this turning operation using the coordinate system shown in Figure 2.

Experimental Setup Fo Colchester Ph The Laboratory Is Held On A Tuming Poin The Colchester Triumph 2500 Conventaal Lathe 2 (48.89 KiB) Viewed 48 times

EXPERIMENTAL SETUP FO COLCHESTER PH The laboratory is held on a tuming poin the COLCHESTER TRIUMPH 2500 conventaal lathe available at the shop. The machine is fined with a cade tumingi Katal KCR50, TPUN 22 04 08, with a ake age of 9 tisto che indical workpi made of K1045 S Fig1 for ever In this laboratory the coordinate system of the machine is se • the chack of The X'in the radial axis of the lathe. It horizontal, perpen the machine, and oriented from the back to the front of the machine. The fe of the othe workpiece along the Xanis is noted F. It is the radial for • The axis in perpendiculars and the rotational of the chucktal and The force of the tool the workpiece along the Yani isted F, It pant MECHU A Lab the thr • The axis is the longitudinal axis of the late. It is hooal, cortofthe chuck, and oriented from right to left. The face of the tool on the work alo F. It is the feed force. An overview of the combinate system is shown in Figure 2 As the listed into the material from right to left with the rake face facing opwatches fede alonging force along and a radial force along the work The tool is mounted on a traial dyanter Kister 1237As the Fire 2. The serited to a data acquisition system (DAQ) composed of a Kiser 5807A signal com digitation box (National Instrument) and a mamical data procoming sea with a wi (La View). The dynder mees the forces Fx. F. Fwing the ding machining The aqtinchains, displays and res the designs. The signals can be st spreadsheet for analysis. See Figure 3. The Kistler dynmeter and signal conditioner are rably wid. It is twed that online information may be difficted for the signal condi Y(curting force axis)
vill conduct several turning operations by changing individual cutting parameters while keeping 9 of 15 es constant es of cuts is made using a range of food rate at a constant cutting speed and depth of cut • A second series of cuts is made using a range of cutting speed at a constant feed rate and depth of cut The operator starts by setting the position of the tool to the specified depth of cut. The machine rotational speed and feed rate are adjusted from the front panel, through the levers that control the machine's gear box (Figure Ic). The rotational speed is used to set the specified cutting speed based on the initial diameter of the workpiece. The chuck is then put in motion to rotate the piece at the specified speed. The recording of the signals is started from the LabView application prior to the start of the cut. A short period of time lapses before the operator engages the food and starts machining. This provides a sample of the signals along each axis that indicate an eventual offset or presence of noise in the acquisition chain As the tool engages into the material a transient period is observed in the signals until a quasi-steady state establishes. The forces go through a second transient phase at the end of the cut when the operator stops the food. Once the turning operation is completed, the recording of the data for the cut is stopped and the outputs are saved to a file. Some chips from the cut are collected and placed in containers with a reference to the cutting condition. See Figure 6. For each cutting condition: • The surface quality of the workpiece is visually inspected. Pictures are taken to illustrate the roughness of the surface, • The chips are visually inspected to observe their shape and coler and pictures are taken The thickness and width of the chips are measured four times and recorded in a table for each condition. See table I and table 2 below. Fig6 Corwith reference to sing conds and the chips der the curse of the face The data package available on Moodle encloses two folders containing the data files form each cutting conditions: • The directory "varying_feed_rate" has 6 enclosed directories, one for each rate. • The directory "varying cutting speed" has 5 enclosed directories, one for each speed. You will find the force data files inside each subdirectory along with pictures of the chips. A single picture of the machined surface at each cutting condition is also provided in the top-level directory.