DIGITAL FABRICATION: JOINTS - · PDF fileTraditional Woodworking Joints by Hayes Shanesy....
Transcript of DIGITAL FABRICATION: JOINTS - · PDF fileTraditional Woodworking Joints by Hayes Shanesy....
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DIGITAL FABRICATION: JOINTS
ELEANOR MCKENNAGRANT SASO
FELIPE LOPERAOMAYRA DIAZ
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Traditional Woodworking Joints by Hayes Shanesy
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JOINT FORMS
BASIC PRINCIPALS: Encyclopedia of wood joints
- Not developed for a particular function- No evident of joint preference in construction- Adapted in response to change and demand
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JOINT FORMS
- Lap joints and mortise and tenon became more complex over time
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JOINT FORMS
JAPANESE JOINERY: - Use of Splicing
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JOINT FORMS
SOUTHERN EUROPE: - Angled Joints
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JOINT FORMS
HUMAN HAND
Joints were tested
- clasping- grasping - interlocking
- Evolution of joints through Tools
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CHARACTERISTICS
- Strength,flexibility,toughness,appearance,etc.- Derive from the properties of the joining materials - How they are used
JOINT FORMS
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JOINT FORMS: SPLICING
Gerber JointTable Splayed Joint Wedge Locking Joint
Dovetail Joints Gooseneck Joint
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Bridle Joint
Tongue Joint
Box/ Finger Joint
JOINT FORMS: COUNTER
Mortise and Tenon Joint
Blind Corner Lap
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JOINT FORMS: EDGE TO EDGE
Rabbeted & Grooved
Spline Insert
Lap Joint
ButterflyKey
Tongue and Dado Joint
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JOINT FORMS: TRADITIONAL vs DIGITAL
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Jochen Gros’s 50 Digital Wood Joints project
JOINT FORMS: DIGITAL
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Jochen Gros’s 50 Digital Wood Joints project
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Jochen Gros’s 50 Digital Wood Joints project
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Jochen Gros’s 50 Digital Wood Joints project
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JOINT LOGIC: DIGITAL
Jochen Gros’s 50 Digital Wood Joints project
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CNC MILL
BASICS
- Allows for perfect joints to be fashioned in substantially less time- Somewhatdifficulttomaster,butprovidesendlessopportunities- Requires whole new skill set and way of thinking- Ideas must be translatable to a computer program
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CNC MILL
CONSIDERATIONS
- Setting up your Rhino File- 3-axis CNC Router (does not under cut)- Size of Bit - Inside Corner Problem- Tolerances
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CNC MILL
CONSIDERATIONS
- Setting up your Rhino File- 3-axis CNC Router (does not under cut)- Size of Bit - Inside Corner Problem- Tolerances
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CNC MILL
CONSIDERATIONS
- Setting up your Rhino File- 3-axis CNC Router (does not under cut)- Size of Bit - Inside Corner Problem- Tolerances
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CONSIDERATIONS
- Setting up your Rhino File- 3-axis CNC Router (does not under cut)- Size of Bit - Inside Corner Problem- Tolerances
CNC MILL
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CONSIDERATIONS
- Setting up your Rhino File- 3-axis CNC Router (does not under cut)- Size of Bit - Inside Corner Problem- Tolerances
CNC MILL
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CONSIDERATIONS
- Setting up your Rhino File- 3-axis CNC Router (does not under cut)- Size of Bit - Inside Corner Problem- Tolerances
CNC MILL
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CONNECTIONS
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Broken down into several categories depending on the angle and orientation of the two pieces
Further broken down by connection appearance desired
Lap,MortiseandTenon,Scarf,etc.
Two and Three Piece Linear Connections
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Cogged Lap
Provides additional strength, but the pieces do not lie flush
Can be applied as sheet to sheet, frame to frame, or sheet to frame
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Crossed Lap
Requires half of the material which limits the strength
Pieceslieflush,allowingwiderarrayofuse
Can be applied as frame to frame or sheet to sheet
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Mortise and Tenon
Providesadditionalstrength,butthepiecesdonotlieflush
Can be applied as sheet to sheet, frame to frame, or sheet to frame
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Stub Tenon Lap
In addtition to the strengths of a lap joint, the stub tenon provides further resistance to tensile forces
Can only be applied in frame to frame connections
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Gooseneck Lap
Requires much more length of material to make than the Stub Tenon
Used for its strong tensile force resistance paired with its asthetic appeal
Can only be applied in frame to frame connections
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Oblique Scarf
Requires most material but offers the highest strength due to the addition of a third member
Can be applied in frame to frame or frame to sheet connections
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Notched Lap
Can include many different variations, but provides forconnectionsotherthan90degrees.
Can be applied in frame to frame or frame to sheet connections
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Effects of CNC on Design
Focus can be moved from the boundaries of individual pieces to where and how the pieces meet
Connection points become more important as the work becomes more about a system of parts than an overall form
Special attention must be directed towards the juxtapostion of perfection provided by the CNC machine and the inherent imperfections of materials
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Two and Three Piece Planar Connections
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Dovetail Locks together fairly securely even without adhesives
Easily scaled to any size joint
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Finger Another easily-scaled joint
Not as secure as dovetail
Much simpler than dovetail
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Mortise and Tenon Oftenmixedwithfingerjoint
Secure in all directions except the direction of insertion
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Slotted
Can not create a butt-joint
Good for joints in the middle of members
Not as strong against certain forces
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Keys Can be used to join two boards in the same plane without losing any length
Not as strong
Can be made to be very asthetically interesting
Can be mobile
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Biscuits Like keys, but hidden
Can be used on any length of joint
No loss of useable length of material
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Combinations
Can take advantage of the strengths of multiple types of joint
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Combining Planar and Linear
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Finished Examples
Torus Knot Table
Dovetail joint detail is used to create a continuous curvilinear member
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Finger Joint - Chair
Fingerjointsclaspthenextmember,creatingastrongconnectionwhilechangingaxis.
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Kundera Chair - Paulo Neves & Alexandre Kumagai
The seat back provides the structure, holding the chair together by tenon joints
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Upright furniture
For upright construction, the sides of the furniture
piece are fitted with two vertical and one horizon-
tal upright. Uprights and sides are connected with
tongues, so that the sides can be pushed up into
the thus created U. The vertical and horizontal
uprights are connected with a decorative corner
joint, the Halved Dovetail Corner. As the sides are
flush with the inner edge of the upright, the corners
of the shelves do not need to be notched.
?p 1
#
Upright Furniture
Linear members are joined using a halved dovetail corner joint, creating a Ushape.
The sides are then pushed in using tongue joints on the sides of the linear
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Self-supporting Framework
Allthematerialshavethesameprofile,buteachmemberisuniquelycuttosupporttheabstarctstructure.
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C...Stool
The C...Stool by Jochen Gros is one of the first pie-
ces of furniture developed at the C…Lab at the
Hochschule für Gestaltung. The C...Stool is based on
the “Ulm Stool”, which was designed in the early
50s by the Swiss architect and sculptor Max Bill for
the Hochschule für Gestaltung Ulm. Jochen Gros re-
designed this design classic with the intention of
clearly showing the effects of the CNC-production
technology on the “Ulm Stool”. The influence of the
production technology on furniture design is illu-
strated by the CNC-compatible wood joints as well
as by the possibility of engraving various motives
in the stool surfaces.
?p 1
#
C...Stool-JochenGros
Made to clearly show the work done by the CNC as part of theaestheticdesign.
By exposing the Finger Tenons, the process of milling and joinery is made transparent
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Clip-Shelf
For the Clip-Shelf, the crossbars are simply clipped
in the sides and the shelf is already assembled.
This is made possible by the use of the Clip Tenon
Joint. Because of the heavy demands on the mate-
rial of this joint, the Clip-Shelf should be made out
of multiplex plywood. The shelves are mortises in
the sides by means of Finger Tenons, but they
could also be put on drilled in shelf bearers.
?p 1
#
Clip Shelf
CrossbarsareclippedontothesidesusingaClipTenonJoint.
TheshelvesaremortisesinthesidesbymeansofFingerTenons.
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Meander-Shelf
The Meander-Shelf was created in the course of the
project l 100% C…NC. The design aimed at deve-
loping a simple shelf that can be slotted together
and thus assembled without problems nor tools,
and at the same time be manufactured with as little
trim waste as possible. The two vertical shelf bearers
merge in such a way, that they can be cut out of
one board in one go.
?p 1
#
Meander Shelf
Designed as a simpled shelf that would slot together without requiring tools, and still have the least amount of trim waste as possible.
The two shelf bearers are shaped in such a way that they can both be produced from the same board by using Slotting Girder Jointsastheinterlockingshape.
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Chest of Drawers
Top shelf and sides are joined by Lapped Finger Tenon Joints, while the bottom shelf is mortised throughthesidesbyFingerTenons.
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Simplizissimus-Table
Designed to be as a simple construction process, all the elements are machined together from the beginning.
The resulting pieces can be put together with no toolsusingSimpleSottingJointsandFingerTenons.
![Page 59: DIGITAL FABRICATION: JOINTS - · PDF fileTraditional Woodworking Joints by Hayes Shanesy. JOINT FORMS BASIC PRINCIPALS: Encyclopedia of wood joints ... Two and Three Piece Linear Connections.](https://reader036.fdocuments.in/reader036/viewer/2022081721/5a8629277f8b9a882e8cb497/html5/thumbnails/59.jpg)
Joint Chair
Sebastien Wierwinck Plywood Chair
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Frame-Shelf
The wood sides and shelves are bound in placebythelinearframe.
The frame members are held by Jigsaw Mitre Jointsleftexposedfordecoration.
![Page 61: DIGITAL FABRICATION: JOINTS - · PDF fileTraditional Woodworking Joints by Hayes Shanesy. JOINT FORMS BASIC PRINCIPALS: Encyclopedia of wood joints ... Two and Three Piece Linear Connections.](https://reader036.fdocuments.in/reader036/viewer/2022081721/5a8629277f8b9a882e8cb497/html5/thumbnails/61.jpg)
Side-Table
WoodenmembersformaninfiniteframejoinedatthecornersbyMitreJointswithaDovetailKey.
The shelves are added to the frame by Lapped Dovetail Tenons creating a pattern throughout the table edges
![Page 62: DIGITAL FABRICATION: JOINTS - · PDF fileTraditional Woodworking Joints by Hayes Shanesy. JOINT FORMS BASIC PRINCIPALS: Encyclopedia of wood joints ... Two and Three Piece Linear Connections.](https://reader036.fdocuments.in/reader036/viewer/2022081721/5a8629277f8b9a882e8cb497/html5/thumbnails/62.jpg)
Zoom-Table
Designed to maintain a constant proportion between its length, width, and height; making the number of Lapped Finger Tenonsremainthesamenomatterthesizeofthetable.
Thetablejointsonthesidehelppreventdeflectionofthetabletopwhenloaded.
![Page 63: DIGITAL FABRICATION: JOINTS - · PDF fileTraditional Woodworking Joints by Hayes Shanesy. JOINT FORMS BASIC PRINCIPALS: Encyclopedia of wood joints ... Two and Three Piece Linear Connections.](https://reader036.fdocuments.in/reader036/viewer/2022081721/5a8629277f8b9a882e8cb497/html5/thumbnails/63.jpg)
REFERENCES
http://makezine.com/2012/04/13/cnc-panel-joinery-notebook/http://www.edinburghsculpture.org/blog/edward-marshall-trust-award/jointshttp://alternative11.livejournal.com/33423.htmlhttp://unldfc.blogspot.com/2010/02/cnc-joints.htmlhttp://teach.alimomeni.net/2012spring1/?p=1163