This packet is intended for presentation during a manufacturing or machine shop orientation course. It addresses hazards, with emphasis on those related to use of machinery. It emphasizes the design concepts that deal with hazard mitigation. The types of machine guards are presented and the concept of lockout/tagout is introduced.
Time for presentation is estimated as 45 - 60 minutes.
Objectives:
1. To sensitize the students to safety issues related to the operation of machinery.
2. To introduce design concepts that address hazard mitigation.
3. To discuss machine-guarding techniques.
This packet includes the following items:
· Lecture materials for the instructor
· Overheads for use during the lecture
· Handouts for the students
· Homework problem
Preview the Lecture material, Overheads, and Handouts
Download the Homework Problem in a printable Adobe Acrobat Format (pdf).
Download the PowerPoint Presentation and notes
Homework problem solutions, exam problems, and exam solutions are available to qualified recipients. Send an email with request information to Dr. Donald Bloswick.
Purpose: To gain an understanding of how to eliminate hazards, and to become familiar with machine guarding techniques.
1. What is the most preferred way to eliminate hazards? ____________________________________________________________________.
2. Name three non-mechanical classifications of hazards. _________________________, ___________________________________, and _____________________________.
3. As an engineer, your job is to design a power press. You decide to guard the mechanical hazard created by the powerful pressing action by using a presence-sensing guarding device. The control system of the press and sensing device allows the press to stop in 0.43 seconds. How far away from the hazard must the presence-sensing device be placed? (Maximum speed of the hand is 63in/s).
4. Briefly explain the principle of Lockout/ Tagout.