Advanced Manufacturing Process (ME F315)

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Questions and Answers

What is the primary objective of the Advanced Manufacturing Process course?

To expose students to automated tools and unconventional machining. (correct)

To familiarize students with basic CNC programming only.

To prepare students for careers in mechanical engineering without new technologies.

To teach students traditional manufacturing processes.

Which of the following skills will students NOT develop upon completing the course?

Forming basic pneumatic circuits.

Understanding NC, CNC, and DNC operations.

Designing complex robotic systems. (correct)

Writing part programs for CNC machines.

Which parameter is NOT mentioned as part of the sensorized manufacturing environment?

Skin conductance

Movement of body segments

Breath rate

Temperature control (correct)

What aspect of manufacturing does the course primarily aim to enhance?

Understanding of automated and non-traditional processes. Signup and view all the answers

What will students learn about CNC machines in this course?

Part programming for given geometries. Signup and view all the answers

What is an expected learning outcome regarding materials in the Advanced Manufacturing Process course?

Students will be exposed to industry-relevant new materials. Signup and view all the answers

Which statement is true regarding the application of wearable devices in manufacturing?

They help bridge cognitive gaps workers experience. Signup and view all the answers

What aspect of non-traditional machining processes will students understand?

The modelling aspects and process details. Signup and view all the answers

What fundamental process does manufacturing involve?

Converting raw materials into a finished product Signup and view all the answers

What is the primary purpose of machining in manufacturing?

To remove excess material to achieve desired dimensions Signup and view all the answers

Which century is associated with the historical development of metal machining?

15th century Signup and view all the answers

Who is considered the father of numerical control (NC) in machine tools?

J.T. Parsons Signup and view all the answers

What major technological advancement in manufacturing is attributed to the 1950s?

The introduction of CNC technology Signup and view all the answers

Which automated production equipment was developed during the 20th century?

Screw machines and transfer lines Signup and view all the answers

Which language was developed by MIT in 1958 related to CNC?

APT Language Signup and view all the answers

What role do robots play in programmable automation?

They perform tasks programmed for specific functions Signup and view all the answers

Which type of motion control requires the tool to move from point to point without continuous contact with the part?

Point-to-point motion Signup and view all the answers

What is the main difference between open loop and closed loop systems?

Closed loop systems provide feedback to monitor movement, while open loop systems do not. Signup and view all the answers

In CNC programming, what does the term 'auxiliary operations' refer to?

Tasks performed in conjunction with machining that are controlled by CNC execution. Signup and view all the answers

What structure do blocks in a CNC part program consist of?

A set of words designed to form an instruction. Signup and view all the answers

Which of the following is NOT a characteristic of continuous-path tool movements?

The operations include drilling and reaming. Signup and view all the answers

What kind of motors are typically used in closed loop CNC systems?

AC, DC, and hydraulic servo-motors with variable speed. Signup and view all the answers

Which of the following positioning systems ensures that the location is based on a fixed reference?

Absolute positioning Signup and view all the answers

Which command in a CNC program typically designates a task requiring movement to specific coordinates?

G00 Signup and view all the answers

What is the main purpose of using canned cycles in CNC programming?

To simplify programming and reduce program length Signup and view all the answers

Which canned cycle is specifically used for rough material removal in a CNC lathe?

G71 Signup and view all the answers

What is NOT an advantage of using canned cycles for programming?

Increased program complexity Signup and view all the answers

Which canned cycle is used to cancel all previously defined canned cycles?

G80 Signup and view all the answers

What is the correct usage of incremental positioning in CNC programming?

Moves are calculated based on the current position Signup and view all the answers

Which canned cycle is associated with threading operations in CNC lathe programming?

G76 Signup and view all the answers

What is the impact of using canned cycles on the length of part programs?

Canned cycles significantly decrease the length of part programs Signup and view all the answers

What does the 'U' parameter represent in G71 canned cycle for a CNC lathe?

Depth of cut Signup and view all the answers

What does the parameter 'U' represent in a G71 cycle?

Depth of cut Signup and view all the answers

During the G71 cycle, what action occurs after the tool moves in the x-axis to the specified depth?

Tool continues moving in the z-axis Signup and view all the answers

How is the cycle cutting feed defined in a G71 cycle?

By specifying the F parameter Signup and view all the answers

What is the final motion of the tool in the G71 process?

Tool moves to last programmed depth rapidly Signup and view all the answers

In a G71 cycle, what does the 'R' parameter represent?

Retraction amount in the x-axis and z-axis Signup and view all the answers

What happens to the tool after retracting a distance R in the G71 cycle?

The tool moves rapidly back to the start-point Signup and view all the answers

What is defined in the P and Q blocks of a G71 command?

The coordinates of start and finish points Signup and view all the answers

Which parameter is used to set the spindle speed during a G71 cycle?

S Signup and view all the answers

Study Notes

Course Overview

Focuses on advanced manufacturing processes, including automated machine tools and unconventional machining.
Teaches CNC part programming and introduces students to additive manufacturing and micromachining.
Covers pneumatic circuits and new materials used in the manufacturing industry.

Learning Objectives

Grasp basic operations of NC, CNC, and DNC technology.
Write part programs for CNC machines effectively.
Understand non-traditional machining processes in detail.
Develop foundational skills for creating basic pneumatic circuits.
Gain exposure to industry-relevant materials and characterization techniques.

Industrial Revolution & Industry 4.0

Industry 4.0 represents the fourth industrial revolution, characterized by sensorized manufacturing environments.
Motion sensors assist in assessing worker well-being, performance, and capabilities.
Wearable technologies provide real-time support and feedback to workers.

Manufacturing Recap

Manufacturing transforms low-value raw materials into high-value products, enhancing functionality and utility.
Example: Mild steel converts into useful products like bolts through manufacturing processes.

Machining Definition

Machining is a finishing process that removes excess material from preformed blanks, producing desired dimensions and surface finish.
Chips are generated as material is removed using cutting tools.

Historical Development of Machine Tools

15th century marked the beginning of metal machining.
The 20th century saw advancements like programmed automation and the introduction of NC/CNC machines.

CNC Programming

A CNC program consists of commands controlling machine operations to produce parts from blanks.
Each program block contains words forming specific instructions for machine actions.

Key CNC Characteristics

Motion Control:
- Point-to-Point (PTP) allows movement to specific points for operations.
- Continuous Path maintains contact with the workpiece during operation, suitable for milling and turning.
Positioning Systems:
- Absolute positioning refers to defined coordinates.
- Incremental positioning relates to movements from the current position.

Canned Cycles in CNC Programming

Canned cycles simplify programming by allowing multiple operations under one command, improving efficiency.
Common canned cycles for lathes include:
- G71: Rough turning
- G70: Finishing
- G72: Facing
- G76: Threading

Example of G71 Canned Cycle

Depth of cut, retract height, and finishing allowances are parameters defined in the G71 cycle.
The process involves a series of defined tool movements for effective material removal.

Conclusion

Understanding advanced manufacturing processes is critical for future engineers, aligning theoretical knowledge with practical applications.
Mastery of CNC programming, especially in canned cycles, enhances efficiency and productivity in manufacturing settings.

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Description

This quiz is designed for students enrolled in the Advanced Manufacturing Process course at BITS Pilani K.K.Birla Goa campus. It aims to deepen understanding of modern manufacturing techniques and their applications. Students will explore various processes and developments in the field of mechanical engineering.