Troubleshooting and Adjusting the Cone Blow

Cone Blow Image The following lesson outline details the tasks individuals will be able to perform upon completion of the lesson. Some of these tasks require the trainee to explain how something works to insure they have the required understanding of the processes and are not simply memorizing procedures. All of the tasks listed will be a part of the Performance Test within each lesson. To learn more about these tests and the training process itself, see the Philosophy section.

The instructional technique employed will enable individuals to develop the skills necessary to cut cone blow punches and troubleshoot part problems created by both cone blow and finish blow punches. In addition to the lesson materials, a troubleshooting flow chart is included. This algorithm format enables new trainees to use the same thought processes experienced personnel use to isolate the causes of various part problems. Both existing personnel and new trainees can utilize these training materials to develop or improve their performance.

After completing this lesson the operator will be able to:

  1. Explain the two conditions a cone blow blank must meet to produce a proper finish blow.
  2. Identify the four types of cone blow punches used and explain under which situations they should be used.
  3. Choose a standard cone blow punch with the proper bore size for the sire being used.
  4. Select a cone blow pin of the correct size for the punch selected.
  5. Identify the cone shape found to be most successful for standard fasteners.
  6. State the size range limits of the cone angle.
  7. State the factors used to dertermine the width of the mouth of the cone and the maximum limit in relationship to the wire diameter.
  8. Explain how changing either the angle of the cone cavity or width of the cone cavity effects the volume of material that will be in the cone shape.
  9. State the angle most often used for standard fastener cone blow punches.
  10. Determine the straight length of wire which can be within the cone shape for various cone angles relative to the wire diameter being used.
  11. Compute the maximum length of unsupported wire possible during the upset for various wire diameters.
  12. Shape a cone blow punch using the equipment available within the shop.
  13. Produce cone blow blanks and detect the following problems and state the corrective actions required:
    1. Buckling During Blow
    2. Distored Cone Blow
    3. Underfillled Blow
    4. Flash
  14. Produce finish blow blanks and detect the following problems and state the corrective actions required:
    1. Rings
    2. Eccentric Heads
    3. Cold Shut
    4. Flashes
  15. State the conditions under which a sliding blow punch is necessary.
  16. State the advantages to using a sliding blow which is pushed back during upset.