Sioux_Industrial_Catalog - page 78

SAFETY PRECAUTION:
Read and follow all safety and operating instructions.
WARNING:
Face & eye protection must be worn while operating power tools, per ANSI B186.1
For maximum power the combined length of the two rivet sets
must be of the correct length.
Determine the correct lengths as follows:
1) When two cupped rivet sets are used:
The length of the body
dimensions of the two rivet
sets (A1, A2) should equal
the closed height dimension
of the yoke (H) minus the
total thickness of material
being riveted together.
2) When one cupped set and one flush set are used:
The length of the body
dimensions of the two rivet
sets (A1, A2) should equal
the closed height dimension
of the yoke H minus the total
thickness of material being
riveted (M) and the height
of the finished rivet head (Z)
compressed by the flush set
(A).
3) When two flush sets are used:
The length of the body
dimensions of the two rivet
sets (A1, A2) should equal the
closed height dimension of
the yoke (H) minus the overall
length of the rivet (M) after it is
compressed.
If necessary, select rivet
sets a little short and shim
to the correct length using
spacer shims.
SPECIALTY |
SIOUX TOOLS INDUSTRIAL CATALOG
Principles of Operation
Air powered compression riveters deliver a squeezing action, which drives the rivet by “flowing” the rivet metal with compressed
forces. Squeezing action is obtained by coupling an air cylinder and piston to a wedge or cam, thus multiplying the original force to
extreme ratios. High compressive forces are obtained from a relatively compact unit having small diameter cylinders and using very
little compressed air.
The advantage of squeeze riveting is simple sounds of air exhaust and forward piston movement developing tremendous pressures
being exerted at the work point.
Optimum control may be obtained in compression riveting. The rivet head is formed by a steady, uniform squeeze action. The set
plunger and dolly are an integral part of the squeezer itself.
Length of the return stoke may be adjusted that the plunger itself does not have to travel its full length.
Consistently applied pressure makes for a better appearance of the finished product as well as giving the ultimate in
structural efficiency.
Classification of Squeezers:
Alligator: The squeezing action of the jaws are similar to the movement of an Alligators jaws.
‘C’ Type: The rivet is squeezed between the two ends of the ‘C’.
SPECIALTY
Compression Riveters
Type of Rivet:
Rivet material.
Rivet body diameter.
Rivet length before and after compression.
Force required to compress rivet.
Riveter Selection Guide:
What material is the rivet made from?
What size is the rivet?
What is the form of the head?
What components are being assembled?
Are there any clearance problems?
Is Alligator or ‘C’ type yoke required?
How is the application being done now?
Are there any special considerations?
COMPRESSION RIVETERS
Rivet Set
Shim
C-Yoke
(or Jaw)
cupped rivet set
cupped rivet set
M H
A
1
A
2
A
1
+ A
2
= H - M
A
1
+ A
2
= H - M - Z
A
1
A
2
Z
cupped rivet set
flush rivet set
M
H
A
1
A
2
flush rivet set
flush rivet set
A
1
+ A
2
= H - L
M
H
76
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