Optional Activity 3.3.1c – Metal Joining ProcessIdentification

Purpose

Take a few minutes to look around you. Can you find a metal object that was made without fasteners or an adhesive? How about the trashcan in your room? How is it held together? What about your teacher’s filing cabinet? In the future, you may want to design similar types of products – metal productswithout mechanical fasteners or adhesives. This activity will provide you the opportunity to learn about various metal joining processes used in metal assembly. This knowledge willbe helpful to you as you learn more about how metals are joined and when you disassemble a product.

Equipment:

  • Pencil
  • Computer withInternet access
  • Engineer’s notebook

Procedure

In this activity, you will use a computer with internet access to research the various metal joining processes listed on the worksheet. You will need to take notes in your engineer’s notebook as you discover how each process is performed. Complete the Metal Joining Process Identification Worksheet by matching the metal joining processes listed with their proper description. When finished, submit your completed worksheet to your teacher for assessment.

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Copyright 2007

IED – Unit 3 – Lesson 3.3 – Optional Activity 3.3.1c –Metal Joining Process Identification – Page 1

Metal Joining Process Identification Worksheet

Metal Joining Processes Matching – PART 1
DIRECTIONS:Match the metal joining process listed on the left to its definition on the right. Place the appropriate letter in the space provided.
_____Riveting / a.High current at a low voltage passes through two pieces of metal (usually sheet metal) for a short period of time.
b.Occurs at temperatures below 800 degrees Fahrenheit, performed with a gun.
_____Soldering
c.Joining processing where the filler material flows into the joints using capillary action.
_____Soft soldering / d.Used when fastening metals together that are not easily welded, or where welding is not practical.
e.Process of fastening two metals together with a nonferrous metal that has a lower melting point than the parts being joined.
_____Hard soldering
f.Occurs above 800 degrees Fahrenheit with heat of a torch flame.
g.High current at a low voltage passes through two pieces of metal (usually sheet metal) for a short period of time.
_____Brazing
h.Occurs at temperatures below 800 degrees Fahrenheit, performed with a gun.
_____Spot welding / i.Joining processing where the filler material flows into the joints using capillary action.
Metal Joining Processes Matching – PART 2
DIRECTIONS:Match the metal joining process list on the left to the correct definition on the right. Place the appropriate letter in the space provided.
_____Rivets / a.Most frequently used for metal joints but sometimes used to join sheet metal to small diameter rods or small flat bars.
_____Solder / b.Upon solidification, it adheres (sticks) tightly and forms a strong bond between the two surfaces.
_____Soft soldering / c.Metal pins that look like bolts with no threads and may be either solid or tubular.
_____Hard soldering / d.Uses a material called rosin core 60-40 which is made up of 60% tin and 40% lead.
_____Brazing / e.Often used in jewelry and art metalwork for joining copper, silver, and gold.
_____Spot welding / f.Used to join intial metal before quality metal is joined

Conclusion

  1. How doesa metal product’s assembly influence the determination of the metal joining process?
  1. How does a metal product’s purpose or function influencethedetermination of the metal joining process?
  1. Examine one metal item within the classroom and determine if a different metal joining process would have made the product more durable, functional, or attractive. Explain.

Project Lead The Way, Inc.

Copyright 2007

IED – Unit 3 – Lesson 3.3 – Optional Activity 3.3.1c –Metal Joining Process Identification – Page 1