Installation:
- One time burying method: when pouring concrete, bury the ground
bolt.
- Pre-reserved hole method: When the equipment is in place, clean the
holes, put the foot bolts into the holes, and then use
non-shrinkage fine gravel concrete.
The role of combination screws
High-strength large hexagon head bolts combination screws for steel
structure are mainly used in railway and highway bridges, boiler
steel structure, industrial plants, high-rise civil buildings,
tower mast structure, lifting machinery and its steel structure
need to use friction-type high-strength bolts combination screws
occasions. Characterised by the bolt, also known as the end of the
bolt more than one dodecagonal body. Installation, shall use a
special electric spanner, the top and bottom of the two socket
head, a set of hexagonal body in the nut, another set of hexagonal
screws in the ten dodecagonal body. When tightening, the nut to
apply clockwise force distance, the bolt twelve angle body to apply
an equal size counterclockwise force distance, so that the end of
the hexagonal screw and twelve angle body connected to the neck to
withstand twisting and shearing, to the neck to cut off until the
end of the installation began to end. This twisted shear type
high-strength hexagonal screws for a one-time use of screws,
installation generally can not be dismantled.
The role of the combination of screws is also very simple, is
connected to fasten the product object, because it is a pop-up flat
pad rubbing good teeth in the screws, the use of the use of flat
pads do not need to match the pop-up flat pads. And in use, the
combination of screws and a particularly large role, is the role of
anti-loosening.
Applications:
There are two main ways to judge the hardness of steel, which are
Brinell hardness in HB and Rockwell hardness. Steel can be improved
by mixing it with alloys, for example by adding carbon, known as
carbon steel, which increases its hardness and rigidity but
decreases its toughness and plasticity.
The properties of steel can vary after different types of
processing, with a focus on quenching and tempering. Quenching is
the process of heating steel to over 723 degrees and then soaking
it in water for a rapid cool down to increase the hardness.
Tempering means heating the steel to over 723 degrees and then
cooling it slowly to increase its strength and toughness.
