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product design > joints > Flashcards

joints Flashcards

1
Q

properties of a butt joint

A

simplest method of joining timber
relies upon adhesives such as pva

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2
Q

advantages of butt joint

A
  • easy to complete
  • the pieces to be joined are cut square, pva is applied and then the joint is clamped dry
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3
Q

disadvantages of butt joints

A
  • only suitable for very lightweight applications such as modelling
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4
Q

properties of dowel joints

A
  • small round pegs made from a hardwood
  • they come in a range of timbers in different thicknesses
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5
Q

advantages of dowel joint

A
  • simple joining process- stronger tgan using a butt joint because tge dowels interconnect the two pieces
  • easy to use, do not require skills or complex tools
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6
Q

disadvantages of dowel joints

A
  • requires precise drilling and alignment- can sometimes be challenging
  • needs specific tools like a dowel jig, drill and dowels
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7
Q

possible uses of dowel joints

A
  • typically used in flat pack furniture such as bookcases and wardrobes
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8
Q

mitre joints properties

A
  • similar to butt joints- they rely upon simply gluing and clamping the pieces together- at a 45 degree angle
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9
Q

mitre joints advantages

A
  • easy process- using an angled belt sander usually
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10
Q

mitre joints disadvantages

A
  • sometimes its quite a weak joint
  • not always secure- glued together
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11
Q

mitre joints uses

A

picture frames

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12
Q

comb joint properties

A
  • the combs create an increased gluing surface area
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13
Q

comb joint advantages

A
  • make a strong joint
  • comb joints can be cut relatively easily using a band saw or laser cut- or with more skill using a tenon saw and wood chisel
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14
Q

comb joint disadvantages

A

requires accuracy to be able to interlock

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15
Q

comb joints uses

A
  • commonly used to make boxes- perfect for this application because the two piece’s interlock
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16
Q

dovetail joint properties

A
  • have directional strength
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17
Q

dovetail joint advatages

A
  • once glued together, its nearly impossible to pull them apart
  • can be cut by hand using a dovetail saw, or more commonly machined with a router and jig that requires less skill
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18
Q

dovetail joint disadvantages

A
  • can be fairly difficult to mark out and cut, requires skill and practice
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19
Q

dovetail joint uses

A
  • used in making drawers- directional strength- excellent for joining the front and back of a drawer to the sides
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20
Q

mortise and tenon joint properties

A
  • involves making a square or rectangle hole- known as a mortise
  • this might be done with a mortise machine or router, or by simply drilling and cutting using a chisel
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21
Q

advantages of mortise and tenon joint

A
  • strong
  • durable
22
Q

mortise and tenon joint disadvantages

A
  • can be difficult to cut the hole without specialist tools
  • may require specialist, complex tools
23
Q

mortise and tenon joint uses

A
  • used to make heavy duty frame constructions for furniture or similar applications
24
Q

housing joint properties

A
  • a groove is cut into one piece, and the end of the second piece is inserted into it
25
Q

advantages of housing joint

A
  • can be adjusted- could be glued in position to make the joint permanent, or left unglued so it can be taken apart or adjusted
  • structurally strong, can be made using a tenon saw, chisel or router
26
Q

disadvantages of a housing joint

A
  • may difficult to make if a router is not used
27
Q

housing joint uses

A
  • useful for making framework construction, cabinets and shelving
28
Q

half lap joint properties

A
  • it is made by cutting a ‘step’ in the end if each piece
29
Q

half lap joint advantages

A
  • the step is simple to make but it has a larger gluing surface area than a butt joint- making it stronger
  • easy to mark out and cut with a tenon saw or band saw
30
Q

half lap joint disadvantages

A
  • can weaken the strength of the two adjoining boards
31
Q

half lap joint uses

A
  • used to make simple frames or boxes
32
Q

modesty blocks properties

A
  • small, rigid polymer blocks
  • they have moulded holes that take screws which are used to join the block to panels
33
Q

modesty blocks advantages

A
  • simple to use
34
Q

modesty blocks disadvantages

A
  • not a particularly strong joint
  • unattractive joint
  • becoming outdated in mainstream furniture manufacture
35
Q

modesty blocks uses

A
  • might be used on cupboards and storage units
36
Q

barrel nut and bolt properties

A
  • uses a cross dowel that is fitted into one of the pieces to be joined, the bolt is inserted through the other piece of timber and tightened into the cross dowel
37
Q

barrel nut and bolt advantages

A
  • they do not require a flange to be machined or forged onto the receiving part- reducing the weight
38
Q

barrel nut and bolt disadvantages

A
  • bolt requires holding in place while the washer/ nut is installed
39
Q

barrel nut and bolt uses

A
  • used to assemble parts of flat pack furniture such as the frame of a bed or table
40
Q

cam lock connector properties

A
  • consist of a metal dowel that is screwed into one of the pieces by inserting a screwdriver into the slot on the side
41
Q

cam lock connector advantages

A
  • easy to install
  • economical
  • easy to disconnect
42
Q

cam lock connector disadvantages

A
  • may not be ideal for high pressure systems
43
Q

cam lock connector uses

A
  • typically used in flat pack furniture such as bookcases, where the horizontal shelves are attached to the sides
44
Q

wood screws properties

A
  • have a coarser pitch compared to screws used for sheet metal
45
Q

advantages of wood screws

A
  • often, part of the screw- known as the shank, does not have a thread.
  • this makes it easier for screwing two pieces of timber together where the thread is only needed at the bottom
46
Q

advantages of wood screws

A
  • often, part of the screw- known as the shank, does not have a thread.
  • this makes it easier for screwing two pieces of timber together where the thread is only needed at the bottom
47
Q

disadvantages of wood screws

A
  • lower load capacity- unsuitable for heavy duty or high stress applications, less clamping force- lack of a nut means less clamping force than bolts
48
Q

uses of wood screws

A
  • furniture assembly, carpentry projects etc
49
Q

bolts properties

A
  • called ‘coach bolts’ - have a thread that runs about two thirds of the way along the bolt
50
Q

bolts advantages

A
  • under the domed head of the bolt is a square piece that digs into the wood when tightened, preventing the bolt from rotating
  • this means that when the bolt is tightened, the domed head cannot be undone with a spanner
51
Q

bolts disadvantages

A
  • slow installation- bolts generally take longer to install due to the need for a separate nut and potentially two tools
52
Q

uses of bolts

A
  • useful in fitting bolts or locks to wooden doors because it makes them secure if the domed part is on the outside

product design (6 decks)

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