10+ CNC VMC Operator Interview Questions and Answers

We use a variety of gauges in our quality line, including micrometers, calipers, height gauges, and thread gauges.

• Micrometers are used to measure small dimensions with high accuracy.

• Calipers are used to measure the distance between two opposite sides of an object.

• Height gauges are used to measure the vertical distance between a reference point and the object being measured.

• Thread gauges are used to measure the pitch diameter and thread profile of screws and bolts.

Gear hobbing is a machining process for making gears using a special type of cutter called hob.

• Gear hobbing is a gear manufacturing process that uses a hobbing machine to cut teeth into a workpiece.

• The hobbing machine rotates the workpiece while a rotating cutter (hob) cuts the teeth into the gear.

• Hobbing is used to produce gears of different sizes and shapes, including spur gears, helical gears, worm gears, and more.

• The hob is a cylindrical cutting tool with helical cutting ...read more

The two important views in engineering drawing are front view and top view.

• Front view shows the object as it appears from the front

• Top view shows the object as it appears from the top

• Front view and top view are used to create a 3D representation of the object

• Other views such as side view, back view, and isometric view may also be important depending on the object being drawn

The machine control name is Fanuc.

• The machine control system is called Fanuc.

• Fanuc is a popular control system used in CNC machines.

• It is known for its reliability and ease of use.

• Fanuc provides a wide range of features and functions for CNC machining.

• Some examples of Fanuc-controlled machines include Haas, Mazak, and Okuma.

Inserts and VMC tools are used to operate and program jobs with offset and correction.

• Inserts are cutting tools that are inserted into a machine to remove material from a workpiece.

• VMC tools are used in vertical machining centers to perform various operations like drilling, milling, and tapping.

• Job offset refers to the distance between the tool and the workpiece, which is adjusted to achieve the desired result.

• Program editing involves modifying the code that controls the mach...read more

Upset is a process used in forging to increase the diameter of a workpiece. There are two types of upset: Full Upset and Partial Upset.

• Upset is a forging process where the diameter of a workpiece is increased by compressing its length.

• Full Upset involves increasing the diameter of the entire workpiece uniformly.

• Partial Upset involves increasing the diameter of only a portion of the workpiece.

• Upset is commonly used in industries like automotive and aerospace for forming compon...read more

VMC endmill and ball are cutting tools used in vertical machining centers for milling operations.

• Endmill is a type of milling cutter used for cutting slots, pockets, and profiles in a workpiece.

• Ball endmill has a rounded end for creating contoured surfaces or complex shapes.

• Both endmills and balls come in various sizes and materials for different machining applications.

A micrometer is a precision measuring instrument used to measure small distances or thicknesses.

• It is also known as a micrometer screw gauge.

• It consists of a calibrated screw with a spindle that is turned until it comes into contact with the object being measured.

• The measurement is read from the scale on the sleeve and the number of revolutions of the thimble.

• It is commonly used in machining and mechanical engineering for precise measurements.

• For example, it can be used to me...read more

5S is a workplace organization method that aims to improve efficiency and productivity by maintaining cleanliness and orderliness.

• 5S stands for Sort, Set in Order, Shine, Standardize, and Sustain.

• Sort involves removing unnecessary items from the workplace.

• Set in Order involves organizing the remaining items in a logical and efficient manner.

• Shine involves cleaning and maintaining the workplace.

• Standardize involves creating and implementing standard procedures for maintaining ...read more

Gauges are measuring tools used to check the dimensions of a workpiece. L C refers to the length and circumference of the workpiece.

• Gauges are used to ensure that the workpiece meets the required specifications.

• L C refers to the length and circumference of the workpiece, which are important dimensions to measure.

• Examples of gauges include micrometers, calipers, and dial indicators.

Various symbols used in CNC and VMC operations.

• G-codes and M-codes for controlling the machine

• Tool numbers and offsets for tool selection and positioning

• Feed rate and spindle speed for controlling the cutting speed

• Symbols for indicating the start and end of a program

• Symbols for indicating the position of the workpiece and the cutting tool

OEE (Overall Equipment Effectiveness) is a measure of manufacturing productivity. Line supervision involves monitoring and managing production lines.

• OEE is calculated by multiplying availability, performance, and quality rates.

• Line supervision involves monitoring production lines to ensure they are running efficiently and effectively.

• Line supervisors may adjust production schedules, troubleshoot issues, and manage personnel.

• Effective line supervision can improve OEE by reduci...read more