Évaluations - 3, GPA: 4
(
)
)
|
Facilité d'utilisation
It runs through normal 120-V alternating current power. When on, the saw blade has a stroke of 19/16 inches moving at a maximum speed of 2800 strokes per minute. The entire assembly, including the removable blade, weights 6.3 pounds. The saw has 6 speed settings, a trigger which determines whether the saw is on or off, and interchangeable blades. After completing the model and assembling it, we will attempt to animate several aspects of the construction and functions of the saw. Finally, we will end with an ANSYS analysis of the saw to determine certain limits, for example under what load the blade would break, and what would be the strongest material through which the blade can cut. Challenges: In undertaking our task, there are many difficulties that arise. First, the saw is designed for maximum user comfort. That means that the external shell is contoured for the human hand, with different grips and conveniences. These, as a whole, may be difficult to model in ProE. A second complexity will be precisely measuring the size of the pieces to ensure that our assembly comes together correctly. Because of the odd external shape, some of the internal components are also oddly designed. We must also take care in disassembling the model so that we do not damage any of the pieces. Finally, there are approximately 50 different parts to be modeled. Having that many parts to assemble creates complexities in and of itself. A schematic of the saw follows Part Number Name 1 Cover Plate 2 Gear Case Seal 3 Gear Case Cover 4 Spring Washer 5 Screw (M4 x 18mm) 6 Seal 7 Screw (M4 x 10mm) 8 Cover Plate 9 Guide Block 10 Saw Bar Assembly 11 Yoke Plate 12 Retaining Ring 13 Roller Bearing 14 Gear Assembly 15 Screw (M4 x 16mm) 16 Shaft Mounting Plate 17 Ball Bearing 18 Gear Shaft 19 Ball Bearing 20 Blade Release Lever 21 Spring 22 Pin 23 Gear Case 24 Lock Washer 25 Screw 26 Screw 27 Rubber Boot 28 Guard Plate 29 Shoe Assembly 30 Saw Blade 31 Bearing Retainer 32 Screw (M3 x 8mm) 33 Retaining Ring 34 Armature 35 Baffle 36 Screw 37 Field 38 Housing Assembly 39 Logo Plate 40 Bend Relief 41 Power Cord 42 Cord Clamp 43 Screw (M4 x 16mm) 44 Speed Control Board 45 Switch 46 Lead Assembly 47 Screw 48 Data Plate 49 Trigger 50 Brush Tube Assembly 51 Carrying Case Expected Results: After modeling all the parts in ProE, we expect to be able to assemble the pieces together and animate them to show how the saw operates. Hopefully, we will animate the creation process, the normal function of the saw, and the removal/addition of a blade. After that, we hope to be able to use an ANSYS analysis to see the forces acting on different portions of the saw, focusing specifically on the blade and casing. Hopefully, we will be able to find the yield stress of the blade and the maximum hardness of the materials through which it can cut. Work Distribution: Christopher Clark: Outer Casings Writing Assignments/Presentations Danielle Launay: Gears/Bearings Screws Jonathan Lin: Switches Speed Control Mechanism Power Cord John Sequeira: Saw Blades Blade Retainer Mechanism Rishi Wadhera: Plates/Washers Shafts We will all be equally responsible for the assembly and animation of the pieces, and for the force analysis portion of the project. We do, though, reserve the right to change these responsibilities as necessary, or to suit a particular members strongest abilities. References: 628 r.pdf The Ryobi ® Variable Speed Reciprocating Saw from which our models will be created....