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Anonymous users2024-02-121. The cold extrusion connection of the sleeve is to use a high-pressure oil pump as the power source, and the connecting sleeve is extruded along the radial direction through the extruder, so that the sleeve produces plastic deformation, and the steel bar interacts with each other to form a whole to transmit force. Due to the bulky equipment, the workers labored.
High strength, poor equipment maintenance is easy to produce oil leakage and pollute steel bars, affect the normal play of effectiveness, bring inconvenience to the use and maintenance, and the connection speed is not as good as threaded connection.
The sleeve is larger and the cost is higher than that of a threaded connection.
2. The taper thread connection is to use the taper thread threading machine to process the end of the steel bar into a taper thread, and then connect the sleeve with a taper thread with the steel bar to be butted.
Together. When the steel bar is connected to the sleeve, a certain tightening torque must be applied to ensure the connection.
Quality, if the worker is negligent and cannot tighten it for a while, the steel bar will be stressed.
It is easy to slip off, the bottom diameter of the cone thread is less than the diameter of the base circle of the base metal of the steel bar, the strength of the joint will be weakened, affecting the performance of the joint, although the cone thread connection is good for neutrality, but the requirements for the steel bar are stricter, and the steel bar can not be bent or have a horseshoe-shaped cut, otherwise it is easy to produce threads.
Incomplete, leaving hidden dangers to the quality of the connection. So, on-site management.
Stricter on request.
3. Upsetting rough cutting straight thread connection is to cut off the horseshoe-shaped end of the steel bar first, and then use the steel bar upsetting machine to upset the end of the steel bar, cut it into a straight thread with a straight thread sleeve machine, and connect the steel bar to be docked together through the straight thread sleeve. The upsetting straight thread connection is not only a complicated process, but also a metallographic structure of the head of the steel bar after upsetting.
If there is a change, it will not be tempered, and the stress concentration will be generated.
The reduction of ductility is not conducive to improving the force on the joint.
4. The extruded rib rolling straight thread connection is to roll the end of the steel bar into a straight thread with a straight thread rolling machine, and then use the straight thread sleeve to connect the two steel bars to be butted together. Because the end of the steel bar is rolled and formed, and the steel bar material is treated by cold work, the strength of the thread and the steel bar are improved, which makes up for the influence of the bottom diameter of the thread being less than the diameter of the base circle of the steel bar on the weakening of the strength, and realizes the connection of the equal strength of the steel bar. This technology is characterized by the advantages of less processing processes, high connection strength, and convenient construction, due to the rolling of the steel bar itself.
The tolerance is large, the quality control of the thread head processing is difficult, the stress conditions of the thread rolling wheel are harsh, and the working life is low.
5, equal strength rib stripping rolling straight thread connection, is on a special equipment will be the steel bar wire head through rib stripping --- rolling thread automatic one-time forming, because the bottom of the thread steel bar raw material is not cut off, but is rolled and compacted, steel bar work hardening, improve the strength of the raw material, so as to achieve the purpose of steel bar equal strength connection. This technology is known for its simple operation, less processing process, long working life of thread rolling wheel, stable and reliable joints, and convenient construction; The thread shape is good, the precision is high, there is no false thread, and the connection quality is reliable and stable.
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Anonymous users2024-02-11The mechanical connection of steel bars includes tapered thread connection, straight thread connection, sleeve extrusion connection and other processes.
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Anonymous users2024-02-10Summary. At present, the mechanical connection is mainly in three ways: taper thread, straight thread and extrusion sleeve.
Lap, welding, and mechanical joining are the three different joining methods at the rebar joint site. Lap joint refers to the connection method in which two steel bars have a certain overlapping length with each other and are tied with iron wire, which is suitable for connecting steel bars of smaller diameter. Welding is well understood, no more to say.
Mechanical connection refers to the joining method that uses mechanical external force to connect two steel bars together. There are many types of mechanical connection joints, and the most widely used ones are extruded sleeve joints and threaded sleeve joints. These two joint methods belong to cold connection, their connection reliability is better than welding, and the operation is simpler, which is suitable for the field connection of large-diameter steel bars, and is now also the main method of field connection of large-diameter steel bars.
If the appearance of the primary and secondary mechanical connections cannot be seen, unless the joint connector certificate is seen, or the tensile test of the specimen is determined.
How many mechanical connection methods are there for steel bars in construction projects? What is a secondary mechanical connection?
At present, the mechanical connection is mainly three ways: cone thread, straight thread and extrusion sleeve, lap connection, welding and mechanical connection are three different connection methods of steel bar joints. Lap joint is a connection method that refers to two steel bars that have a certain overlapping length with each other and are tied with iron wire, which is suitable for connecting steel bars of smaller diameters. Welding is well understood, no more to say.
Mechanical connection refers to the joining method that uses mechanical external force to connect two steel bars together. There are many types of mechanical connection joints, and the most widely used ones are extruded sleeve joints and threaded sleeve joints. These two joint methods belong to cold connection, and the connection reliability of their local skin is better than that of welding, and the operation is also simpler, which is suitable for the field connection of large-diameter steel bars, and is now also the main method of field connection of large-diameter steel bars.
If the appearance of the primary and secondary mechanical connections cannot be seen, unless the joint connector certificate is seen, or the tensile test of the specimen is determined.
Hope it helps, dear
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Anonymous users2024-02-09Answers]: a, b, c, d
The mechanical connection of steel bars has steel bar sleeve extrusion connection, steel bar cone thread shouting cautious sleeve connection, steel bar upsetting straight thread sleeve connection, steel bar rolling Zheng die straight thread sleeve connection.
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Anonymous users2024-02-081) Sleeve cold extrusion or dust pressure connection;
2) Reinforced cone threaded connection;
3) Rigid threaded connection such as steel bars;
Superior excite: power saving, easy construction, not affected by the climate, not subject to the restriction of the weldability of the first group of socks of the steel bar, ***, do not be skilled.
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Anonymous users2024-02-07There are several types of mechanical connection forms of steel bars, such as tapered thread sleeve, straight thread sleeve and extrusion sleeve connection.
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Anonymous users2024-02-06The commonly used types of mechanical joints for rebar are:
Sleeve extrusion joints, cone thread joints, pier thick straight thread joints, rolling straight thread joints, molten metal filling joints and cement grout filling joints.
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Anonymous users2024-02-05Hunan Hengbang steel bar connection technology **** There are detailed answers on the official website. Nowadays, the most commonly used is a straight threaded sleeve connection.
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