11 Steps to Make Ductwork: Duct Manufacturing Process
Have you ever wondered how the air ducts in your home or office are made? In this fascinating blog post, we'll take you on a journey through the intriguing process…
Ever wondered how industrial ventilation ducts are crafted with precision? In this post, we’ll explore the Pittsburgh Lockformer Machine—a marvel in duct manufacturing. You’ll learn its key functions, technical parameters, and practical uses. Join us as we unlock the secrets behind this essential machine in the world of industrial engineering!
 |  |  |
|---|---|---|
| Multi-function Nip Machine | Combined Elbow Nip Machine | Combined Nip Machine |
Fig.1
Consists of the following three parts:
Fig.2
1) For single flat mouth, tighten the second upper bolt on right discharging port and loosen the right angel bolt.
Matters need attention:
① For SA-12—SA-15HB Pittsburgh locking machine, the thickness of side plate, double-screw bolt④, disc-shaped spring（4a）are adjustable. Four-bolts ③、④ are fixed.
A. Worktable
The trunk is a welded shell structure which is made by angle steel and thin steel sheet, with a fixed worktable panel on sheet top, the panel is equipped with horizontal lead-in positioning plates ①、② and four fixed lead-out positioning plates, see fig 2.
（Fig. 3）Transferring System
B. Conveying and Forming
The entire drive section is an open gearbox.
Passed through the gear shafts11, 12,13,14 and gears 16, 17, 18, 19 to the forming section, gear 19 separately drive Ⅲ down gear 35 and Ⅳ down gear 35, then through the multiple bridge gears driving the entire motion system.
Pittsburgh locking machines are generally equipped with 6 -7 pairs forming shafts, each pair shaft is equipped with a drive gear 35 and left and right two columns or left, center and right three columns of rolling reels.
(Fig. 3) is a comprehensive transmission diagram, however, not all machines are equipped with all the components listed in the fig, such as SA-12、SA-15、SA-12H、SA15 machine without 201-214 rolling reel.
C. Elbow Head
Structural Principal: (one fig.2 top), through bevel gear （5),（7) drive gear (10) and rolling reel （8）and（9）, the workpiece will be put into the reel gap and forming fan-shaped workpiece into a certain height of the right angle bone, as shown in fig.1: E=（1）+（6）
Fig.4
Elbow head is a dedicated part installed on the top of Pittsburgh Locking Machine ( as shown in fig.2: C), mainly used for right angle bone, that is, bending the fan-shaped plate into a certain height of right angle edge( see fig.4).
Connect this kind of right angle and “
”shaped plate with a flange edge to make angle pipe connector.
Each mode of Pittsburgh locking machine will be equipped with an elbow component according to the user demand, for example, change SA12C into SA12BC.
The pittsburgh lock former machine can be used to connect or fold, but can’t roll, so when using the machine, some gap between the upper roller and lower roller is necessary, and the gap is about the minimum plate thickness plus 0.1-0.2 ( 3 ).
The gap has be adjusted before delivery, users should not arbitrarily rotate the limit screw (3) and fastening nut (4) and disc spring (4a)( as shown in fig.2 and 5).
Fig.5
In case of the gap change due to screw (3), nut (4) becoming loosen, or caused by other reasons, first, loosen the nut (4), and put a pair of spacer of the same thickness as 
among the leftmost four groups of rollers, then adjust the limit screw (3) until the four gap basically parallel, re-lock the nut (4),[=Min. plate thickness+0.1-0.2mm], if minimum thickness, put the spacer and leave a slight space.
Right angle roller 300 part, manually adjust the roller and disc-shaped spring, keep the thin sheet “
” shaped 90°.
②Bone Shape Adjustment:
Loosen the screws (1) and (2) on leading-in positioning plate and move the guiding plate in horizontal direction to widen or narrow the forming parts. Wide plate 
, narrow plate 
, wide plate 
,narrow plate 
.
③Elbow use and adjustment ( fig. 7 )
First, bending the workpiece head into 90°,length 15mm, height H (SA15-HB H=10mm, others 8mm) (as shown in fig.6).
Then insert the B end among (8) and (9) in narrow direction ( as fig.7), then fasten screw (40), start the machine, hard push the plate along with the guide rotor into rolling roller.
Here are the drawings:
Here are the drawings:
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