Shearing, slitting, notching and cutting
What shearing, slitting, notching and cutting each do, how the metal and its coating change the cut, how to plan and set up the cuts from an order to a blank, and how to read edge, shape and coating defects before a piece moves on.
4 lessons · about 42 min · 14 diagrams · 5 videos
Version 1.1.0
Builds on these modules
Lessons
0 of 4 complete
Lesson 1 · 11 min · 11 slides · 9 questions
Shearing, slitting, notching and cutting: principles and terminology
What each cutting process does, the parts of a shear and the settings that matter, how to read a sheared edge, and where the danger is.
You will be able to: Define shearing, slitting, notching and cut-to-length, name the parts of a squaring shear and the zones of a sheared edge, and state the safety boundaries.
Not startedStart →Lesson 2 · 11 min · 11 slides · 9 questions
Shearing, slitting, notching and cutting: materials, standards and design constraints
How the metal changes the cut, what happens at a cut edge, how coated sheet is cut and cleaned, and the regulations and PPE that apply.
You will be able to: Take thickness from the register, read published clearance ranges by metal, protect stainless, copper, galvanized and painted edges, and name the rules that govern shear safety.
Not startedStart →Lesson 3 · 11 min · 12 slides · 8 questions
Shearing, slitting, notching and cutting: methods and worked application
From an order to a cut blank: the set-up sequence, worked clearance, twist, blank and piece-count examples, slitting set-up, notching and hand cutting.
You will be able to: Plan blanks and pieces from a profile, set up and prove a shear, slitter or notch by a documented method, and record the inputs, units and checks.
Not startedStart →Lesson 4 · 9 min · 10 slides · 7 questions
Shearing, slitting, notching and cutting: defects, verification and case study
Reading bad edges, twist, bow and crook, slitting and notch defects and coating damage; the checks before a piece moves on; and a case worked through.
You will be able to: Diagnose sheared, slit, notched and field-cut defects from the evidence on the piece, choose the corrective action, and record the inspection for review.
Not startedStart →
Practical task
Plan and document cutting the blanks for one FlashDraft profile in 24 ga galvanized, from the order to inspected blanks ready to form (or, without a shear, plan it fully on paper), as a job packet a reviewer can check.
Hand in
- A decision record: the profile, its girth and run length checked against AFS's maximum girth and piece length, the cutting method chosen and why (shear, slitter, snips), and any notches the profile needs
- The calculations with units and sources: blanks across the sheet, the drop, pieces for the run with any splice lap, and the typical clearance range for the thickness with the shear maker named
- A marked-up sketch of the blank: girth, bend lines, notch positions, relief holes and the bend zones kept clear
- A test-strip record: the edge read for rollover, burnished band, fracture and burr, and any clearance or blade change made under lockout
- An inspection checklist for the cut blanks, and a defect analysis for one edge or notch that was off: the evidence, the cause by the sources, and the fix proved on a test strip
Rubric
| Criterion | Meets the standard when |
|---|---|
| Sources | Every number names where it came from: the AFS register, the shear maker, or the order. |
| Calculations | Blank count, drop and piece count are correct, rounded the right way, with units. |
| Set-up | The clearance is presented as the machine maker's figure, the test strip is read zone by zone, and blade work is locked out. |
| Notching | Relief holes are placed and punched first, and notch edges stay out of the bend zones. |
| Diagnosis | The defect analysis ties the evidence on the piece to a cause the sources give, and shows the fix was proved. |
| Safety and finish | The packet records guarding, eye, hand and hearing protection, and how swarf was cleaned without wire brushes or steel wool. |