Cold Saw/V1 Design Rationale: Difference between revisions

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[http://opensourceecology.org/wiki/Cold_Saw/V1_Design_Rationale/Hold_System Hold System]
[http://opensourceecology.org/wiki/Cold_Saw/V1_Design_Rationale/Hold_System Hold System]
=Feature: Auto-Centering Vise=
*'''Auto-Centering Vise''' (to improve cut quality and to fit more workpiece sizes and shapes)
[[Image: ColdSawV1Clamp.png]]
Shaft Collar and Thrust Washer Notes: The shaft collars prevent the shafts and threaded rod from moving under friction and handle rotation, respectively. The thrust washers minimize friction caused by the rotation of the threaded rod's shaft collars under clamping tension.
Cut Location Notes: If the cut occurs at the center of the clamping volume, we achieve maximum clamping rigidity and optimal vise dimensions to facilitate angled cuts (because the vise needs a wide mouth for angled cuts, better to go wide from the center than anywhere else for maximum rigidity and dimensional uniformity).
Cut Depth Notes: At all possible cut angles, the blade must not contact the vise.
Vise Dimensional Notes: The vise achieves maximum rigidity and minimum material usage when its clamping volume is as close to its mounting surface as possible.


=Feature: Swivel Head=
=Feature: Swivel Head=

Revision as of 18:22, 8 June 2012

Concepts

Basic Concept

Blade Rotation System

Movement System

Hold System

Feature: Swivel Head

  • Swivel Head (to allow angled cuts)

ColdSawV1SwvHead.png

Notes: The swivel clamp fastener should be mounted such that the swivel plate is horizontally clamped to the base disc. If the fastener is vertically mounted, then clamping the swivel head can cause bending that reduces the precision of the Cold Saw.

Feature: Adjustable and Removable Vise Jaws

  • Adjustable and Removable Vise Jaws (to accommodate variety of workpiece shapes and dimensions)

ColdSawV1ViseJaws.png

Feature: Fixed Blade Guard

  • Fixed Blade Guard (to protect against unintended blade contact during operation)

ColdSawV1BladeGuard.png

Feature: Forward and Backward Drive Stops

  • Forward and Backward Drive Stops (to prevent cutting into vise and to hold blade in mid-air while mounting the workpiece)

ColdSawV1Stops.png

Uniform Part Dimensions

  • Plate: 25.4mm x 304.8mm (Base Plate, Swivel Plate)


  • Flat Bar: 76.2mm x 50.8mm (Shaft Block, Fixed Block, Moving Block)
  • Flat Bar: 25.4mm x 127mm (Support Bar, Bridge Bar, Interface Bar, Vise Jaw)
  • Flat Bar: 3.175mm x 25.4mm (Blade Guard Support)
  • Flat Bar: 1.6mm x 152.4mm (Blade Guard)


  • Round Bar: 152.4mm DIA (Base Disc)
  • Round Bar: 127mm DIA (Blade Mount Disc)
  • Round Bar: 76.2mm DIA (Shaft Collar with Axial Tensioning, Large Thrust Washer)


  • Round Bar: 50.8mm DIA (Shaft Coupling, Shaft Collar)
  • Round Bar: 31.8mm DIA (Shaft, Operation Handle, Vise Handle)
  • Round Bar: 8mm DIA (Pin)


  • Setscrew: M8x1.25 THREAD
  • Bolts and Nuts: M12x1.75 THREAD
  • Threaded Rod: M30x3.5 THREAD
  • Nuts: M30x3.5 THREAD

Uniform Mounting Dimensions

  • Swivel Mechanism

Base Disc Mounting Rectangle Sides: 60mm x 100mm

  • Vise Mechanism

Vise Mounting Rectangle Sides: 50mm x 90mm

Center-to-Center Distance Between Vise Shaft and Threaded Rod: 95mm

  • Rotary Support Mechanism

Shaft Block Mounting Rectangle Sides: 30mm x 55mm

  • Drive Mechanism

Interface Mounting Rectangle Sides: 75mm x 80mm

Hydraulic Motor Mounting Rectangle Sides: 40mm x 100mm

  • Blade Guard

Center-to-Center Distance between Blade Guard Support Screws: 100mm

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