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Thread Rolling Machines |
Rebar Couplers |
Rebar Splice Specimens |
The technologies of parallel thread rebar splice include directly rolling and Rolling after stripping rib.
1 Principle
1.1 Rolling after stripping rib
(1) Cutting off the end of the rebar;
(2) Stripping the ribs at the end of the rebar and rolling thread;
(3) Splicing the rebar by using the coupler.
1.2 Directly rolling
(1) Cutting off the end of the rebar;
(2) Rolling the end by using the special rolling machine;
(3) Splicing the rebar by using the coupler.
2 Features
* High splice strength, which could exert 100% of the tensile and compression strength of rebar, it could satisfy the requirements stipulated in the Chinese standard JGJ107,American standard UBC1997, British standard NF35-20-1,German standard DIN1045,ISO/WD15835(Draft)and other requirement in the relevant standard home and abroad;
* Simple operation, need no technicians, fast splicing on construction site;
* High production efficiency, 300 to 500 threads could be produced during one shift;
* The splices could be produced in advance without influencing the construction period;
* Economic, low investment for the equipment;
* Environment-friendly, safe, no environmental and weather restrictions.
3 Machine Models and Features of Rolling System
|
Name of Equipment |
Directly Rolling Machine |
Rolling after Stripping Rib Machine |
|
Model of Equipment |
QTG-40 |
QTG-50 |
QTG-40 |
QTG-50 |
|
Suitable Rebar Size(mm) |
16-40 |
36-50 |
16-40 |
36-50 |
|
Power of Main Motor(kw) |
4.0 |
4.0 |
4.0 |
4.0 |
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Reductor Ratio |
01:29 |
01:29 |
01:29 |
01:29 |
|
Dimensions(mm) |
1170×710×1140 |
1220×670×1140 |
1170×710×1140 |
1220×670×1140 |
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Weight(kg) |
500 |
630 |
500 |
630 |
4 Parameters of Rolling Splice
|
Bar Diameter（mm） |
Out Diameter of Coupler（mm） |
Length of Coupler（mm） |
Thread Size（mm） |
Weight of Coupler（kg） |
|
Directly Rolling |
Rolling after Stripping |
|
12 |
18 |
32 |
M13×2.0 |
M12.5×2.0 |
0.03 |
|
14 |
21 |
36 |
M15×2.0 |
M14.5×2.0 |
0.05 |
|
16 |
23 |
42 |
M17×2.5 |
M16.5×2.5 |
0.07 |
|
18 |
28 |
46 |
M19×2.5 |
M18.5×2.5 |
0.13 |
|
20 |
30 |
50 |
M21×2.5 |
M20.5×2.5 |
0.15 |
|
22 |
33 |
54 |
M23×2.5 |
M22.5×2.5 |
0.19 |
|
25 |
38 |
62 |
M26×2.5 |
M25.5×2.5 |
0.30 |
|
28 |
43 |
68 |
M29×3.0 |
M28.5×3.0 |
0.43 |
|
32 |
48 |
76 |
M33×3.0 |
M32.5×3.0 |
0.58 |
|
36 |
53 |
84 |
M37×3.0 |
M36.5×3.0 |
0.93 |
|
40 |
60 |
92 |
M41×3.0 |
M40.5×3.0 |
1.25 |
|
50 |
77 |
114 |
M45×3.5 |
M44.5×3.5 |
2.37 |
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