Inspection Method - Braid and Coil Density
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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?

<p>Tan masking tape (D)</p> Signup and view all the answers

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

<p>Picks Per Inch (C)</p> Signup and view all the answers

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

<p>The intersecting wires of a braid. (B)</p> Signup and view all the answers

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

<p>Circular (C)</p> Signup and view all the answers

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

<p>To observe the pattern of the coil or braid. (A)</p> Signup and view all the answers

What is the primary purpose of the document?

<p>To demonstrate how to inspect braided or coiled products. (B)</p> Signup and view all the answers

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

<p>A section of coil that encompasses one rotation. (D)</p> Signup and view all the answers

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

<p>Operator Training Manual (#1160) (B)</p> Signup and view all the answers

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

<p>Polymers, fiberglass, composites, or natural fibers. (B)</p> Signup and view all the answers

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

<p>Braid (B)</p> Signup and view all the answers

What should be done after identifying a transition?

<p>Measure the pic/wrap rate on either side of the transition. (D)</p> Signup and view all the answers

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

<p>To understand and use the criteria in the document (C)</p> Signup and view all the answers

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

<p>A coil is a continuous wrap, while a braid is an interlaced series. (B)</p> 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?

<p>Round down to the last whole number. (A)</p> Signup and view all the answers

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

<p>In either the product specification or QIP. (B)</p> Signup and view all the answers

Which document would be MOST appropriate for specific customer requirements?

<p>Product or customer-specific specification documents (C)</p> Signup and view all the answers

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

<p>Reject the nonconforming product according to procedure #1018. (A)</p> Signup and view all the answers

What is the purpose of document revision?

<p>To detail any changes made to the document over time. (C)</p> 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?

<p>Round up to the next whole number. (B)</p> Signup and view all the answers

What should you do first when inspecting a sample?

<p>Identify the transition area. (D)</p> Signup and view all the answers

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

<p>Placed into the latest template and corrected the pictures from covering up the word content. (C)</p> 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?

<p>Center the crosshairs on one edge of a wire intersection. (A)</p> Signup and view all the answers

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

<p>To establish a starting point for counting wraps/pics (B)</p> 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?

<p>Round the number to the nearest whole wrap/pic unless specified otherwise. (A)</p> Signup and view all the answers

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

<p>The region where the pic or wrap rate begins to change. (C)</p> Signup and view all the answers

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

<p>By visually identifying changes in the pic or wrap rate with the vision system. (D)</p> 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?

<p>Measure the number of pics or wraps called for in the specification to confirm change. (B)</p> Signup and view all the answers

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

<p>On the edge of a coil as it wraps over the profile. (B)</p> Signup and view all the answers

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

<p>To ensure all sections meet the specification. (A)</p> Signup and view all the answers

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

<p>measure the distance to the same edge of the next wrap (B)</p> Signup and view all the answers

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

<p>Refer to the Quality Inspection plan or product specification. (A)</p> Signup and view all the answers

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

<p>On an edge of an intersection of the wires or filaments. (C)</p> Signup and view all the answers

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

<p>The distance to the same edge of the next intersection of the wires or filaments. (B)</p> Signup and view all the answers

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

<p>Verify the width is in tolerance before recording. (A)</p> Signup and view all the answers

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

<p>The number of pics or wraps per a defined measure. (D)</p> Signup and view all the answers

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

<p>Centered on one edge of a coil as it wraps. (D)</p> Signup and view all the answers

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

<p>Pic rate is a count measurement per unit whereas pitch is a measurement of distance. (D)</p> Signup and view all the answers

Flashcards

Coil

A continuous wire or filament wrapped in one direction around the product.

Wire

Metal in the form of a flexible thread or strand.

Filament

Strands made from non-metallic materials like polymers, fiberglass, composites, or natural fibers.

Wrap

A section of coil that encompasses one rotation.

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Braid

A series of interlaced windings of wires or filaments creating a mesh-like structure.

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Left or Right Hand Coils

Coils can be wound in either a left- or right-hand direction depending on the application.

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Inspection Method

Verification of the density of braided or coiled products.

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Document Purpose

The document outlines the process for inspecting braided or coiled products.

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Pic/Wrap Pitch

The distance between two consecutive wraps or intersections in a coiled or braided product.

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Pic/Wrap Rate

The number of wraps or intersections per unit of length (typically per inch) in a coiled or braided product.

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Pitch Measurement

The process of measuring the width of each individual wrap or intersection in a coiled or braided product.

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Pic Rate Measurement

The process of counting the number of wraps or intersections within a specific length (typically one inch) in a coiled or braided product.

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Scope Crosshairs

A visual tool used to align the sample and measure the pitch or rate of a coiled or braided product.

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Pic/Wrap Tolerance

The specified permissible variation for the measured pitch or rate of a coiled or braided product.

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Inspection Record

A document used to record the measurements and observations during the inspection of a coiled or braided product, ensuring compliance with specifications.

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Figure 7 & 8

A visual representation showing how to center the sample, place the crosshairs, and measure the distance between wraps for pitch or rate measurement.

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Braid Density Measurement

Measure the number of complete wraps or pics per inch of braided product.

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Aligning Braided Sample

Line up the braided sample with the horizontal axis of the scope crosshairs and center the crosshairs at the edge of a wire intersection.

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Zeroing the X-Axis

Set the scope's X-axis to zero at the starting point of the braid sample.

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Counting Wraps/Pics

Traverse the sample with the crosshairs and count the total number of complete wraps or pics over one inch.

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Verification

Record the count of wraps/pics and ensure it meets the design specification for the product.

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Transition Length

Identify the transition length where the wrap or pic rate starts changing.

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Proximal & Distal Rates

Measure the wrap/pic rate at both the proximal and distal ends of the transition length.

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Repeat for Sections

Repeat the measurement process for each section of the braided product with a variable wrap or pic rate.

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What is a Braid Pattern?

The configuration of a braid, such as Multi-wire, Full load, Half load, or Diamond pattern.

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What is WPI?

The number of times wire wraps around a core within a given inch.

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What is PPI?

The number of intersections of individual wires within a braid per inch.

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What is Pitch?

The distance between individual wraps or pics in a coil or braid.

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What is a Pic?

The intersection points of individual wires in a braid.

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What is the purpose of the Inspection Method?

A method used to verify the density of braid and coil on wire products.

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How is a sample prepared for the braid/coil density inspection?

Securing the wires at both ends of the sample with tan masking tape.

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Why is the sample length important for the braid/coil density inspection?

To ensure the pattern is acceptable and the sample is the right size for the vision system.

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Identifying the transition

The process of identifying the location where the pic/wrap rate changes in a braided or coiled product. It ensures uniform density across different sections.

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Measuring transition length

Measuring the length of the transition zone, where the pic/wrap rate changes, to ensure it meets specifications.

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Measuring pic/wrap rate

Determining the 'pic/wrap rate' on either side of the transition using a specific method, usually involving counting the number of pics or wraps per unit length.

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Rounding rules

The process of rounding up or down the pic/wrap rate measurement based on whether more than half of the current pic/wrap has been covered.

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Visual inspection criteria

A document providing detailed instructions and criteria for visually inspecting braided or coiled products, which are additional to the standard inspection procedure.

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Control of Nonconforming Product

A document summarizing the process for handling non-conforming products, which are those that do not meet the specified requirements.

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Revision History

A document containing the complete history of changes made to an instruction or document, including the date and reason for each revision.

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Verifying Braided and Coil Density

Determining whether a product meets the specified pic/wrap rate and other criteria to ensure quality and uniformity.

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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.

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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.

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