Work instructions - Example

Title / Description of Process

Final Inspection of Machined Components

Created By

Process Number

Initial Issue Date

Current Version

Department / Area

Manufacturing Quality Inspection

Machine / Line

M36H Thread Gauge; Inner Micrometer; 2.5 Dimension Measuring Instrument; CMM

Part Number

Part Name

Machined Component

Workstation

Page No.

To confirm whether a machined component conforms to its defined inspection requirements before the inspection cycle is closed.

• The inspection depends on the availability of the component drawing that defines the required characteristics.
• The inspection depends on access to the specified measuring equipment for each characteristic being checked.

A final inspection report is produced showing the inspected values against tolerance.

Phase 1

Review Inspection Requirements

Understand the component features and inspection points from the drawing before measurement begins.

1

Review component drawing

Review the drawing to identify the component features and characteristics that require final inspection.

• Examine the drawing before inspection starts.
• Identify the relevant characteristics shown on the drawing, such as holes, threading, flatness, perpendicularity, and related dimensional or geometric requirements.

Examine the drawing before inspection starts.

Identify the relevant characteristics shown on the drawing, such as holes, threading, flatness, perpendicularity, and related dimensional or geometric requirements.

The component features and characteristics that require final inspection are identified.

Phase 2

Perform Component Inspection

Carry out the visual, dimensional, and geometric inspections using the specified methods and equipment.

2

Perform visual appearance check

Inspect the component visually to assess its appearance before dimensional measurements are taken.

• Visually examine the component as the first inspection activity.
• Assess the component appearance against the expected condition implied by the drawing and the final inspection objective.

Visually examine the component as the first inspection activity.

Assess the component appearance against the expected condition implied by the drawing and the final inspection objective.

The component appearance is assessed before dimensional measurements are taken.

3

Measure thread accuracy

Use the specified thread gauge to verify the accuracy of the component threading.

• Select the M36H thread gauge for the threading check.
• Measure the threading to confirm its accuracy.

Select the M36H thread gauge for the threading check.

Measure the threading to confirm its accuracy.

The accuracy of the component threading is verified.

4

Measure thread diameter

Use the inner micrometer to check the diameter of the threaded area.

• Use the inner micrometer to measure the diameter of the threads.
• Read the measured value from the instrument and capture it as part of the inspection results.

Use the inner micrometer to measure the diameter of the threads.

Read the measured value from the instrument and capture it as part of the inspection results.

The diameter of the threaded area is checked.

5

Measure hole radius

Use the 2.5 dimension measuring instrument to verify the required hole radius.

• Use the 2.5 dimension measuring instrument for the hole-radius check.
• Verify the required radius value identified on the drawing.

Use the 2.5 dimension measuring instrument for the hole-radius check.

Verify the required radius value identified on the drawing.

The required hole radius is verified.

6

Inspect geometric tolerances with CMM

Use the CMM to inspect geometric characteristics that require more advanced measurement.

• Use the CMM for the geometric inspection activities.
• Inspect characteristics such as perpendicularity, cylindricity, and angle.

Use the CMM for the geometric inspection activities.

Inspect characteristics such as perpendicularity, cylindricity, and angle.

Geometric characteristics requiring advanced measurement are inspected.

Phase 3

Document Inspection Results

Compile the inspection outcome into the final inspection report.

7

Generate final inspection report

Produce the final inspection report containing the measured inspection results and their tolerance comparison.

• Compile the completed inspection results into a final inspection report.
• Present the inspected values in a way that shows their relationship to the allowed tolerance.

Compile the completed inspection results into a final inspection report.

Present the inspected values in a way that shows their relationship to the allowed tolerance.

The final inspection report contains the measured inspection results and their tolerance comparison.