Rough Turning On Cnc.docx

Rough Turning on CNC

1. Problem Definition: To determine the; i. Designation of various tools used for the machining of Aluminium workpieces/components on CNC machine tool. ii. Understanding various cutting conditions during the machining. iii. Determining the grades of various tool inserts used for rough turning operations. iv. Checking the specifications of the respective machine tool. v. Checking the surface roughness values for the rough turning operation on CNC machine.

2. Name of industry visited and address: KRISHNA INDUSTRIES W7, Gokul Shirgoan, M.I.D.C., Kolhapur- 416 234 Maharashtra (India) Phone: +91231-6516297 Tele Fax: +91231-2672799 Email: [email protected]

3. Operation: Rough Turning Rough Turning is the process of removal of excess material from the workpiece in a minimum time by applying high rate of feed and heavy depth of cut. The roughing cut should be so made that the machine should bear the load. The difference between the rough turning and finish turning is that rough turning is done to achieve the ideal size of the workpiece. While the finish turning is done to smoothen the workpiece.

Name of the component: Water Jacket Dimensions

Dimensions of Casting

ID: OD: Length:

212mm 248mm 158mm

Dimension achieved after rough turning 220mm 240mm -

Dimensions achieved after finish turning 222mm 238mm 156mm

4. Material of Component/Workpiece: Al 53000 Aluminium alloy Al 6063 5. Quality Check: The achieved surface finish for ID, OD and other surfaces is 0.6Ra as per requirement. The dimensions of ID and OD are within the tolerance of +/- 0.1mm. 6. Cutting Conditions: The cutting conditions which are considered while machining on CNC machine tool are Speed, Feed and Depth of Cut. Cutting conditions Rough turning Finish turning Spindle speed RPM 400 450 Feed rate mm/rev. 0.1 to 0.8 0.1 to 0.15 Depth of cut mm 2mm 0.5mm Coolant used for both the operations: Spectrum. Grade 6 to 10%

7. Specifications of machine tool: CNC machine tool Model: Manufacturer: Input voltage: Input frequency: Input power: Machine weight:

DX 200 Sr. No. 60010774-2014 Jyoti 415±05% V 50 Hz 20 Kw 3800(APPX) Kg

8. Cutting Inserts/Tool: There are two different types of inserts used for rough turning and finish turning. 0.8 nose radius insert is used for rough turning operation and 0.4 nose radius insert is used for finish turning. Manufacturer:

KORLOY, SANDVICK.

Insert range:

2mm to 8mm

Name of insert:

CNMG120408-HM

Specification:

CNMG432

Grade:

PC9030

9. Tool Holder: