Inspection Method - Braid and Coil Density

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What does 'WPI' refer to in the context of coil measurement?

Wires Per Inch

Weaves Per Inch

Width Per Inch

Wraps Per Inch (correct)

What is the purpose of securing the wires on both ends of the sample with tape?

To make it easier to handle during vision system analysis.

To mark the sample for identification.

To prevent further coil expansion.

To keep the wires from unraveling after being cut. (correct)

According to the document, what is the acceptable sample length range, unless otherwise specified?

3-5 inches

5-7 inches

2-4 inches

4-6 inches (correct)

What material should be used to secure samples for braid/coil analysis, according to the document?

Tan masking tape Signup and view all the answers

What does 'PPI' stand for in the context of braid measurement?

Picks Per Inch Signup and view all the answers

In the context of the document, what is a 'pic'?

The intersecting wires of a braid. Signup and view all the answers

Which of the following is NOT a braid pattern type mentioned in the document?

Circular Signup and view all the answers

What is the primary purpose of using the vision system for samples?

To observe the pattern of the coil or braid. Signup and view all the answers

What is the primary purpose of the document?

To demonstrate how to inspect braided or coiled products. Signup and view all the answers

According to the document, what is a 'wrap'?

A section of coil that encompasses one rotation. Signup and view all the answers

Which of the following is NOT listed as a reference document?

Operator Training Manual (#1160) Signup and view all the answers

What materials can a 'filament' be made from, according to the document?

Polymers, fiberglass, composites, or natural fibers. Signup and view all the answers

Which term describes an interlaced series of windings of wires or filaments?

Braid Signup and view all the answers

What should be done after identifying a transition?

Measure the pic/wrap rate on either side of the transition. Signup and view all the answers

What is the responsibility of all individuals handling braided and coiled products?

To understand and use the criteria in the document Signup and view all the answers

What is the main difference between a 'coil' and a 'braid'?

A coil is a continuous wrap, while a braid is an interlaced series. Signup and view all the answers

When rounding the pic/wrap rate, what should you do if you have covered slightly less than half of a wrap?

Round down to the last whole number. Signup and view all the answers

According to the document, where can visual inspection criteria be found?

In either the product specification or QIP. Signup and view all the answers

Which document would be MOST appropriate for specific customer requirements?

Product or customer-specific specification documents Signup and view all the answers

What action should be taken if a nonconformance is noted during inspection?

Reject the nonconforming product according to procedure #1018. Signup and view all the answers

What is the purpose of document revision?

To detail any changes made to the document over time. Signup and view all the answers

If you are measuring the pic/wrap rate and you've covered more than half of a current pic/wrap, how should you round?

Round up to the next whole number. Signup and view all the answers

What should you do first when inspecting a sample?

Identify the transition area. Signup and view all the answers

What was the update made with revision '1' on 11/03/15?

Placed into the latest template and corrected the pictures from covering up the word content. Signup and view all the answers

When measuring a braided product, what is the initial step after aligning the sample with the scope's horizontal axis?

Center the crosshairs on one edge of a wire intersection. Signup and view all the answers

For measuring braided product, why is the microscope's X-axis zeroed?

To establish a starting point for counting wraps/pics Signup and view all the answers

What action should be taken if the number of wraps or pics counted for a braided product does not exactly match the specification?

Round the number to the nearest whole wrap/pic unless specified otherwise. Signup and view all the answers

What does 'transition length' refer to when measuring variable pic products?

The region where the pic or wrap rate begins to change. Signup and view all the answers

When measuring the transition of a variable pic product, how are distal and proximal ends established?

By visually identifying changes in the pic or wrap rate with the vision system. Signup and view all the answers

After visually identifying the transition on a variable pic product, what is the next step in measuring the transition point?

Measure the number of pics or wraps called for in the specification to confirm change. Signup and view all the answers

When measuring the pitch of a coiled product using a scope, where should the crosshairs initially be centered?

On the edge of a coil as it wraps over the profile. Signup and view all the answers

Why should multiple measurements of a variable pic product's transition be repeated?

To ensure all sections meet the specification. Signup and view all the answers

After zeroing the scope's X-axis when measuring pitch, what is the next step?

measure the distance to the same edge of the next wrap Signup and view all the answers

What should be done if extreme variation exists within the picks and wraps of a braided product?

Refer to the Quality Inspection plan or product specification. Signup and view all the answers

For braided product, where do you align the scope crosshairs to begin measuring pitch?

On an edge of an intersection of the wires or filaments. Signup and view all the answers

When measuring the pitch of a braided product, what should the user measure?

The distance to the same edge of the next intersection of the wires or filaments. Signup and view all the answers

According to the inspection method, what must be done after measuring each pic or wrap width?

Verify the width is in tolerance before recording. Signup and view all the answers

When measuring pic rate (7.3), what is the primary value being determined?

The number of pics or wraps per a defined measure. Signup and view all the answers

While measuring coiled products, where are the scope crosshairs initially aligned for measuring pic rate?

Centered on one edge of a coil as it wraps. Signup and view all the answers

What is the relationship between the measurements for pitch and pic rate?

Pic rate is a count measurement per unit whereas pitch is a measurement of distance. Signup and view all the answers

Study Notes

Inspection Method - Verifying Braid and Coil Density

Document Number: 3543
Revision: 2
Effective Date: 8/15/2023
Purpose: To demonstrate inspecting braided or coiled products manufactured by Putnam Plastics Corporation.
Scope: Applies to all braided and coiled products at Putnam Plastics Corporation.
Responsibilities: All personnel handling braided/coiled products must understand and use the criteria.

Reference Documents and Forms

In-Process and Final Inspection: Work instruction #1151
Good Documentation Practices: #1029
Incoming Inspection Procedure: #1156
Control of Nonconforming Product: #1018
Quality Inspection Plan: Specific product or customer documents
Vision System Operation: #1866
Quadra-Check 200 Vision System: #1881

Definitions

Wire: Usually flexible metal thread or strand.
Filament: Non-metallic strands (polymers, fiberglass, composites, or natural fibers).
Coil: Continuous wire/filament wrapped in one direction.
Wrap: A section of coil encompassing one rotation.
Left/Right Hand: Winding direction; often specified for applications.
Braid: Interlaced windings of wires/filament.
Pattern: Braid configurations (multi-wire, full load, half load, or diamond).
WPI: Wraps Per Inch (for coils).
PPI: Pics Per Inch (for braids).
Pitch: Measurement of individual wraps/pics.
Pic: Intersecting wires in a braid.

Safety Precautions

No specific safety precautions listed for this inspection procedure; follow general safety guidelines.

Process

Sample Collection: Collect according to QIP, standard procedures, or customer specifications.
Sample Preparation: Wrap sample with tape (tan masking tape initially, avoiding blue due to adhesion issues). Cut through tape on both ends.
Sample Placement: Place on vision system stage for proper observation. Length should be 4-6 inches, unless specified otherwise.

Measuring Pic/Wrap Rates

Pitch (Coiled): Align sample horizontally, zero the X-axis, and measure the distance to the next wrap edge on the sample. Repeat for desired number of wraps/pics.
Pitch (Braided): Align sample horizontally, zero the X-axis, and measure distance to the next intersection of wires/filaments. Repeat for desired number of intersections.
Pic Rate (Coiled/Braided): Align sample, zero X-axis, count complete wraps/pics per inch; round to nearest wrap/pic.
Variable Pic/Wrap Rate: Identify transition lengths, measure pic/wrap rates for proximal/distal ends. (Identify start/end of pitch change).
Rounding: Round down if less than half a wrap or pic over the measurement; up if more than half complete.

Additional Notes

Visual inspection criteria are in product specifications or QIP.
Nonconformances require rejection (Control of Nonconforming Product #1018).
Refer to specific work instructions or engineers for additional questions.

Studying That Suits You

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

Description

This quiz assesses knowledge of the inspection methods used for braided and coiled products at Putnam Plastics Corporation. It covers the responsibilities of personnel, relevant documentation, and definitions related to the inspection process. Gain a deeper understanding of quality assurance for these specific products.