Welded structure
Use hot-rolled steel (angle steel, I-beam, channel steel, steel pipe, etc., steel plate, cold-formed thin-walled steel and steel wire as basic components, and connect them by welding, bolting or rivet connection according to certain rules After the basic member is formed, the basic member is irregularly connected into a structure capable of withstanding external loads as a steel structure by welding, bolting or rivet connection.

The welding structure has a series of advantages that other structures can not compare, mainly reflected in the following aspects:

1. The welding structure has strong integrity. Because welding is a kind of connection between metal atoms, with large rigidity and good integrity, it will not produce excessive deformation due to the change of clearance like other mechanical connections under the action of external force, so the strength and rigidity of welded joints can generally reach the same or similar to the base metal, and can bear various loads with the basic metal.

2. The welding structure has high strength and light weight. The welded structure is mostly made of rolled material, which has a strong ability to bear the impact load, and the strength of steel is many times higher than that of masonry, concrete and other building materials. The strength of the welded joint made by modern welding technology is higher than that of the base metal.

Parts or components of welded structure can be directly connected by welding without any additional connectors. Compared with riveted structure, the mass with the same structure can be reduced by 10% - 20%.

3. The welding structure has high safety performance. Due to the good plasticity of steel, in general, it will not cause sudden fracture damage due to accidental overload or partial overload, but there is a large deformation omen in advance, so as to take remedial measures. The steel also has good toughness and strong adaptability to the dynamic load acting on the structure, which provides a reliable guarantee for the safe use of the welded structure.
In a certain stress range, the steel is in an ideal elastic state, which is more consistent with the basic assumption adopted by engineering mechanics, so the calculation results are accurate and reliable to ensure the safe use of the welded structure.

4.The welding structure has good compactness. Due to the compactness of the weld, the welding structure can ensure the air tightness and water tightness requirements of the product, which is an indispensable and important condition for the normal operation of pressure vessels such as boilers, gas tanks, oil tanks, etc.
Prefabricated building
Prefabricated building refers to the transfer of a large number of site work in the traditional construction methods to the factory, where the construction components and accessories (such as floor, wall panels, stairs, balconies, etc.) are processed and manufactured, transported to the construction site, and assembled and installed on site through reliable connection.Has the following advantages:

1. Convenient transportation, suitable for frequent change of construction site;

2. Rugged, all made of steel, with strong seismic, deformation resistance;

3. Good sealing performance and strict manufacturing technology make the mobile room with good water tightness;

4. mobile housing green environmental protection, save time and effort, flexible;

5. The container room is easy to disassemble and assemble, stable and firm, with good shockproof performance, waterproof, fireproof and anti-corrosion, and light weight.

6. Mobile homes can be used for indoor electricity through solar photovoltaic panels. Solar water heaters can be used for heating and water supply.
Machining parts and molds
Application scope
1. All kinds of metal parts processing;
2. Sheet metal, box and metal structure;
3. Titanium alloy, high temperature alloy, nonmetal and other mechanical processing;
4. Design and manufacture of marine combustion chamber;
5. Design and manufacture of non-standard equipment.
6. Mold design and manufacturing.
Engineering equipment
The mechanical equipment necessary for the comprehensive mechanized construction engineering of earthwork construction engineering, pavement construction and maintenance, mobile crane loading and unloading operation and various construction engineering is called engineering machinery.

It is mainly used in national defense construction projects, transportation construction, energy industry construction and production, mining and other raw materials industry construction and production, agriculture, forestry and water conservancy construction, industrial and civil construction, urban construction, environmental protection and other fields.

The main products of the machinery industry include the following 12 categories:

(1) Agricultural machinery: tractors, seeders, harvesting machinery, etc.

(2) Heavy mining machinery: metallurgical machinery, mining machinery, hoisting machinery, loading and unloading machinery, industrial and mining vehicles, cement equipment, etc.

(3) Construction machinery: shovel transport machinery, compaction machinery, concrete machinery, etc.

(4) General petrochemical machinery: petroleum drilling and production machinery, oil refining machinery, chemical machinery, pumps, fans, valves, gas compressors, refrigeration and air conditioning machinery, paper-making machinery, printing machinery, plastic processing machinery, pharmaceutical machinery, etc.

(5) Electrical machinery: power generation machinery, transformer, high and low voltage switch, wire and cable, battery, welding machine, household appliances, etc.

(6) Machine tools: metal cutting machine, forging machinery, casting machinery, woodworking machinery, etc.

(7) Automobile: truck, road bus, car, refitted car, motorcycle, etc.

(8) Instruments and meters: automation instruments, electrical instruments, optical instruments, composition analyzer, automobile instruments and meters, electrical equipment, electrical equipment, camera, etc.

(9) Basic machinery: bearings, hydraulic parts, seals, P / M products, standard fasteners, industrial chains, gears, molds, etc.

(10) Packaging machinery: packaging machine, packing machine, conveyor, etc.

(11) Environmental protection machinery: water pollution prevention and control equipment, air pollution prevention and control equipment, solid waste treatment equipment, etc.

(12)Mining machinery.