Awards:
Craig and Cindy Evans, Winside - Champion Senior Engineering
Jeff and Lisa Farran, Winside – Reserve Champion Senior Engineering
Craig and Cindy Evans, Winside - Champion Junior Engineering
Dave Quinn Family, Winside – Reserve Champion Junior Engineering
Premiums: Purple $4.50, Blue $4.00, Red $3.50, White $3.00 Participation $3.00
Science, Technology, Engineering & Math (STEM)
This department gives 4‑H members an opportunity to display their knowledge and skills gained relating to computers, drones, electricity, energy, geospatial, robots, rockets, welding, and woodworking. Through participating in this department, 4‑H members will present their knowledge in these areas as they relate to STEM.
All metal welding processes accepted.
A. The name and county of each 4-H member should appear separately on the back of each board, poster, or article and on the front cover of the notebooks so the owner of exhibit may be identified if the entry tag is separated from the exhibit.
B. All welds exhibited in class 001 and 002 must be mounted on a 12 inches (H) x 15 inches (W) display board of thickness not to exceed 3/8 inch. Attach each weld on a wire loop hinge or equivalent, so the judge can look at the bottom side of the weld when necessary. Each weld should be labeled with information stated 1) type of welding process (stick, MIG, TIG, Oxy-Acetylene, etc.) 2) kind of weld, 3) welder setting, 4) electrode/wire/rod size, and 5) electrode/wire/rod ID numbers. Attach a wire to display board so it can be hung like a picture frame. No picture frame hangers are accepted.
C. Fabricated boards such as plywood, composition board, or particle-type lumbar may be used for demonstration displays.
D. Demonstration boards should include an overall title for the display, plus other necessary labeling.
E. Reports should be written using the scientific method whenever possible: 1. Hypothesis 2. Research 3. Experiment 4. Measure 5. Report or Redefine Hypothesis. All reports should be computer generated and enclosed in a clear plastic cover. The reports should be attached securely to the display.
F. Please refer to the General Rules (Letter L) for the policy regarding firearms, items with a blade, and other related items.
G. Please refer to the General Rules (Letter M) for the policy regarding the use of copywritten images.
H. Premier 4-H Science Award is available in this area.
I. All outside projects MUST have entry tag and supporting information placed in a protective bag to prevent damage from weather events such as rain and be ATTACHED to projects with string, zip ties, etc. when exhibited at the State Fair.
J. Scoresheets, forms, contest study materials, and additional resources can be found at https://go.unl.edu/ne4hstem.
K. Entries: Each 4-H member is limited to one item per class.
Classes:
+H-920-001 Welding Joints (SF281) - A display of one butt, one lap and one fillet weld.
1. All welds should be made with the same electrode/wire/rod size and number.
2. Welds should be made only on one side of metal so penetration can be judged.
3. Welds should be cleaned with a chipping hammer and wire brush. Apply a coat of light oil (penetrating oil) to the metal to prevent rusting. Wipe off excess oil.
4. It is suggested that all welds be of the same size and thickness as metal. These pieces, referred to as coupons, should be 1.5 to 2 inches wide and 3.5 to 4 inches long. A good way to get this size is to buy a new cold rolled strap iron and cut it to length. The extra width is needed to provide enough metal to absorb the heat from the welding process and prevent the coupons from becoming too hot before the bead is completed. Narrower coupons will become very hot, making an average welder setting too cold at the bead start, just about right in the middle, and too hot at the end. The correct way to weld narrow strips is to make short beads and allow time to cool, however this project requires a full-length bead.
Stick welding:
Suggested coupon thickness 1/4 inch if using 1/8-inch rod
Suggested rod-AC and DC straight or reverse polarity-
first E-7014, second E-6013
MIG welding:
Suggested coupon thickness 1/4 inch if using .035 wire and
1/8 inch if using .023 wire
Oxy Acetylene:
Suggested coupon thickness- 1/8 inch
Suggested rod-1/8-inch mild steel rod
+H-920-002 Position Welds (SF281) - A display showing three beads welded in the vertical down, horizontal, and overhead positions.
1. It is suggested that all welds be of the same size and thickness of metal. These pieces are referred to as coupons. The welds can be on one coupon that is about 4 inches x 4 inches or on individual coupons that are about 2 inches x 4 inches and 1/4 inch thick. Suggested rods for this class of position welds for AC and DC straight or reverse polarity is, first E-6013, second E-7014 and E-6010 for DC reverse polarity only.
2. Welds should be cleaned with a chipping hammer and wire brush. Apply a coat of light oil (penetrating oil) to the metal to prevent rusting. Wipe off excess oil.
+H-920-003 Welding Art (SF283) - any art created using tack welds to hold the metal pieces together (examples include horseshoe projects). Type of welder, welder settings, all plans, plan altercations, and a bill for material must be attached to the article. Protect plans with a cover. If project is designed to be outside, it is required to have appropriate outdoor finish. All welds should be cleaned and protected from rust with paint or light oil. Plans are to be complete enough that if they were given to a welding shop, the item could be made without further instructions. Bill of materials should include a cost for all items used including steel, electrodes, paint, wheels, etc.
+H-920-004 Welding Article (SF282) - Any shop article or piece of furniture where welding is used in the construction. 60% of the item must be completed by the 4-H member and notes regarding laser welding or machine welding must be included. Type of welder, welder settings, all plans, plan altercations, and a bill for material must be attached to the article. Protect plans with a cover. If project is designed to be outside, it is required to have appropriate outdoor finish because project may be displayed outside. All welds should be cleaned and protected from rust with paint or light oil. Plans are to be complete enough that if they were given to a welding shop, the item could be made without further instructions. Bill of materials should include a cost for all items used including steel, electrodes, paint, wheels, etc.
+H-920-005 Welding Furniture (SF282) - Any furniture with 75% welding is used in the construction. 60% of item must be completed by the 4-H member and notes regarding laser welding or the machine welding must be included. Type of welder, welder settings, all plans, plan altercations, and a bill for material must be attached to the article. Protect plans with a cover. If project is designed to be outside, it is required to have appropriate outdoor finish because project may be displayed outside. All welds should be cleaned and protected from rust with paint or light oil. Plans are to be complete enough that if they were given to a welding shop, the item could be made without further instructions. Bill of materials should include a cost for all items used including steel, electrodes, paint, wheels, etc.
+H-920-006 Plasma Cutter/Welder Design (SF279) - Plasma cutters/welders allowed for detailed design(s) to butt cut into metal. 4-H members will create a notebook describing the design process to crate the “artwork” to butt cut into the metal.
In the notebook include:
1. A photo (front and back) of the finished project.
2. Instructions on how the design was created (include software used), this allows for replication of the project.
3. Lessons learned or improvements to the project.
4. Steps to finish the project.
+H-920-007 Composite Weld Project (SF282) - 60% of the project must be welded and 40% made from other materials such as wood, rubber, etc. Type of welder, welder settings, all plans, plan altercations, and a bill for material must be attached to the article. Protect plans with a cover. If project is designed to be outside, it is required to have appropriate outdoor finish because project may be displayed outside.