Quality control, or QC for short, is a process by which entities review the quality of all factors involved in production. An ISO 9000 defines quality control as "A part of quality management focused on fulfilling quality requirement. This approach places an emphasis on three aspects (enshrined in standards such as ISO 9001: 2018
DIFFERENT APPROACHES FOR QUALITY
Elements such as controls, job management, defined and well managed processes,performance and integrity criteria, and identification of records
Competence, such as knowledge, skills, experience, and qualifications
Soft elements, such as personnel, integrity, confidence, organizational culture, motivation, team spirit, and quality relationships.
THE MACHINES WE USE FOR QUALITY CONTROLS
DIGITAL VERNIER CALIPER
The Digital Vernier Caliper is a precision instrument that can be used to measure internal and external distances extremely accurately. The example shown below is a digital caliper as the distances/measurements, are read from a LCD display.
INSIDE/ OUTSIDE VERNIER CALIPER
A Vernier caliper is a precision instrument that measures internal dimensions, outside dimensions, and depth.
The depth gauge micrometer is a precision measuring instrument, used by engineers to measure depths. Each revolution of the rachet moves the spindle face 0.5mm towards the bottom of the blind hole.
A go-no gauge (or go/no-go) refers to an inspection tool used to check a workpiece against its allowed tolerances. Its name is derived from two tests: the check involves the workpiece having to pass one test (go) and fail the other.
A ring gauge, or ring gage, is a cylindrical ring of a thermally stable material, often steel, whose inside diameter is finished to gauge tolerance and is used for checking the external diameter of a cylindrical object.
A thread gauge, also known as a screw pitch gauge or pitch gauge, is used to measure the pitch or lead of a screw thread. The uppermost gauge in the image is an ISO metric pitch gauge, the larger gauge in the center is for measuring the Acme thread form, and the lower gauge is for Whitworth screws.
A spring joint caliper is a measuring instrument consisting of two legs, a spring, and an adjusting nut. The friction of the screw and adjusting nut counteracts the tension of the spring which determines the position of the legs.
A radius gauge, also known as a fillet gauge, is a tool used to measure the radius of an object. Radius gauges require a bright light behind the object to be measured.