Versatile Automated Component Saw - PowerPoint

Document Sample
Versatile Automated Component Saw - PowerPoint Powered By Docstoc
					Versatile Automated Component
              Saw

   Introduction….needs lots of work!
                                              Requirements

•Bevel to 45 degrees in both directions
•Miter to 45 degrees in both directions
•Be accurate to within the industry tolerances
•Be cost competitive with any other saws or factory set ups
•Meet productivity requirements for the industry
•Operate on all sizes of wood as outlined below




                             Size        Application                   Length
                             1” x 6”     Trims, Window Sills           8’ – 10’
                             2” x 4”     Interior Walls                8’ – 10’
                             2” x 6”     Exterior Walls                8’ – 10’
                             2” x 10”    Trusses, Floor Joices         12’ – 20’
                             2” x 12”    Floor, Trusses, Decks, etc.   12’ – 20’
                                                     Market Options
•Chop miter saws are versatile in that they can bevel and miter cuts usually to about 45 degrees. Their weakness is that the size of
wood that they can cut is dictated by their blade diameter.

•Radial arm saws radial arm saws are as versatile as chop saws, but do not have their limitations. The cutting head can also be
rotated 90 degrees so that is acts as an over-cutting table saw. These saws are more expensive as a result.

•Pendulum saws also require large blades to cut through wider timber due to the path they take. The biggest problem with these
saws for this application though is that they cannot bevel a cut, only miter.

•Automated optimizing saws do not generally offer much in terms of versatility. These machines are developed for specific tasks
and act very efficiently, but as of yet cannot offer a solution to the problem posed.

•Log home building machines are at the other end of the spectrum. These machines are equipped with saws, but mostly utilize 5
axis milling cutters. These are over designed for the industry and as such the cost of these machines is too great.

•Dual saw assemblies such dual chop miter saw or dual radial arm saws offer a twin blade solution to the problem posed, but these
machines require that the cutting be done by hand. Only the set up of the saw is automated giving less productivity than is
desirable.




                                                      OMGA RADIAL 1100/7
                                                        Source: OMGA
                                                        Saw Types
Saws can be roughly divided into circular saws and band saws. Band saws are more suited to artistic and metal work though they
are also seen in primary lumber conversion and occasionally in secondary conversion. Their strength is in high speed and smaller
kerf. Circular saws are used mostly in primary and secondary lumber breakdown. The strength of circular saws is in their stability.
For these reasons, the choice to use a circular saw was already made by the industry. The difference between over-cutting or under-
cutting is less clear as can be seen by the common use of both table saws and radial arm saws for ripping wood.

 Design Consideration                         Under-cutting Saw (Table Saw)                Over-cutting Saw (Chop Saw)
 Safety                                       High risk of kickback and operator injury    Lower risk of kickback
 Motor Placement                              Complex due to space constraints             Simpler due to more space
 Cutter Head Design                           Complex and constrained by space             More complex but no space constraints
 Structure Design                             Complex as the entire structure must         Simpler as individual parts can move
                                              move together                                independently
 Table design                                 Complex as cutting and clamping must         Complex but cutting and clamping
                                              not interfere with each other                systems can be designed independently
 Maintenance                                  Complex as the components are harder to      Simpler as the components are not
                                              access                                       enclosed in a table
 Saw Dust                                     Can potentially go into the table and        Less likely to damage the mechanism
                                              damage the mechanism
 Blade Change                                 Complex as with maintenance                  Simple as blade is more accessible


 From the comparison above, it becomes apparent that an over-cutting saw is a simpler design and that it will be easier to operate
 once completed.

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:9
posted:6/12/2012
language:
pages:4