CNC Machine Tools in Mechanical Engineering
24 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is one of the advantages of using a CNC milling machine?

  • Limited processing capabilities
  • No need for intermediate measurements
  • Increased labor intensity of the operator
  • High accuracy and repeatability (correct)

    • A CNC milling machine can only mill plane curve contours.

    False

    What is one of the ways in which a CNC milling machine reduces labor intensity of the operator?

    By automatically completing the processing of parts according to pre-programmed procedures

    The spindle speed and feed speed of a CNC milling machine are _______________ variable.

    <p>continuously</p> Signup and view all the answers

    What is a feature of CNC controllers that allows for storage of multiple programs?

    <p>Multi-program storage</p> Signup and view all the answers

    Match the following terms with their descriptions:

    <p>Fast forward = Reduces labor intensity of the operator Multi-program storage = Allows for storage of multiple programs Axis linkage = Greatly improves production efficiency</p> Signup and view all the answers

    A CNC milling machine can only perform one type of operation (e.g. milling or drilling).

    <p>False</p> Signup and view all the answers

    What is one of the benefits of using a CNC milling machine in terms of production?

    <p>It greatly improves production efficiency</p> Signup and view all the answers

    Which of the following is NOT a type of CNC application in the non-machine tool category?

    <p>Lathe machine</p> Signup and view all the answers

    A CNC system consists of only four elements.

    <p>False</p> Signup and view all the answers

    What is the primary function of the Machine Control Unit (MCU) in a CNC system?

    <p>It is the heart of the CNC system, controlling various components of the CNC machine.</p> Signup and view all the answers

    The USB port is a common data communicating protocol used to transfer data to the ______________________.

    <p>controller</p> Signup and view all the answers

    Match the following components with their respective functions in a CNC system:

    <p>Central Processing Unit = controls the CNC machine CNC Memory = stores part programs and data Input/Output Interface = connects the computer to the CNC machine Machine Tool controls = regulates spindle speed, coordinate system, feed, and depth of cut</p> Signup and view all the answers

    Which of the following is an input device for a CNC system?

    <p>Conversational Programming</p> Signup and view all the answers

    Ethernet Communication is a reliable and efficient means of transferring part programs from a computer to a CNC controller.

    <p>True</p> Signup and view all the answers

    What is the function of the Feedback Devices in a CNC system?

    <p>They provide feedback to the MCU about the machine's performance and status.</p> Signup and view all the answers

    What is the primary function of a CNC system?

    <p>To control the motions of a machine tool through a prepared program</p> Signup and view all the answers

    Conventional machines are highly accurate and productive.

    <p>False</p> Signup and view all the answers

    What does CNC stand for?

    <p>Computer Numerical Control</p> Signup and view all the answers

    CNC machining is a type of ___________ process.

    <p>material removal</p> Signup and view all the answers

    What type of computer is commonly used in CNC control systems today?

    <p>Microcomputer</p> Signup and view all the answers

    Match the following CNC machines with their applications:

    <p>Lathe = Turning Drill Press = Drilling Milling Machine = Milling Laser = Cutting</p> Signup and view all the answers

    CNC systems are only used for machine tool applications.

    <p>False</p> Signup and view all the answers

    What is the advantage of CNC systems over conventional machines?

    <p>Improved accuracy and productivity</p> Signup and view all the answers

    Study Notes

    Introduction to CNC Machine Tools

    • CNC (Computer Numerical Control) is a system that controls the functions and motions of a machine tool through a prepared program containing coded alphanumeric data.
    • CNC can control the motions of the workpiece or tool, input parameters, and functions such as turning spindle on/off and coolant on/off.

    Machining Process

    • Machining is the process of material removal to form a shape and size of a product.
    • There are various methods of material removal, managed by different machines.
    • Conventional machines are manually operated and controlled, but have issues with accuracy and productivity.

    Applications of CNC

    • CNC is widely used in machine tool areas, such as lathe, drill press, milling machine, grinding unit, laser, and sheet-metal press working machine.
    • CNC is also used in non-machine tool areas, such as welding machines, coordinate measuring machine, electronic assembly, tape laying, and filament winding machines for composites.

    Elements of CNC System

    • Input device: USB, serial communication, Ethernet communication, and conversational programming.
    • MCU (Machine Control Unit): consists of central processing unit, CNC memory, input/output interface, machine tool controls, and auxiliary function controls.
    • Machine tool: performs the actual machining operation.
    • Driving system: provides power to the machine tool.
    • Feedback devices: provide information about the machining process.
    • Display unit: shows the status of the CNC system.

    Salient Features of CNC Controls

    • Fast forward, fast rewind, and fast positioning functions reduce maneuvering time.
    • Can process complex shapes, including plane curve contours and spatial surface contours.
    • Continuously variable spindle speed and feed speed allow for optimal cutting amounts.
    • Can reduce labor intensity of the operator by automating processing according to pre-programmed procedures.

    Advantages of CNC

    • High accuracy and repeatability obtained.
    • (Remaining advantages not mentioned in the provided text)

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    This quiz covers the elements of a CNC system, salient features of CNC controls, advantages and disadvantages, and machining process in mechanical engineering.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser