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Building steel bars are processed by manpower since long period of time
in our country. Semi-mechanized processing of steel bar appeared since
domestic processing equipments produced, mainly in construction site to
work. Because of the lower performance, low automatic level and
processing ability of steel bar processing machinery, this processing
way restrict severely rising the modernization level of building
construction, increasing the inconvenience for the construction
management. It also needs more working strength, being difficult to
control the quality, and has many disadvantages of low efficiency, waste
of materials and energy, high cost of processing, occupying more places
and produce high noise ,etc.
2.
Project content
Commercial processing and delivery of steel bar menas that in the
special factory the wounded or straight steel bar is processed to steel
bar products through certain procedure (straightening,
cutting, curving, forming of steel bar mesh, mechanical connection of
steel bar end; forming of large prefabricated steel bar element, like
steel bar cage and trunk, etc.)
by special mechanical equipment set for project on site to install. For
the big project with long term of construction the factory may be
located on the site or nearby to reduce the cost of transportation, but
it’s working condition should meet requirement. This way of processing
of the steel bar can be used instead of traditional way of processing on
site by manpower or by semi-mechanical equipments. This way of
processing has more features, like reducing cost, rising efficiency,
high quality, assuring delivering, reducing wasting of steel bar and
reducing energy consuming, etc.
Steel bar processing automatic mechanical equipment is one of steel bar
machinery and pre-stressed machineries; it is suitable for use in the
steel bar processing factory. It meets the requirement of processing
procedures and can work automaticallyor semi-automatically. These
equipments mainly are numerical controlled steel bar straightening and
cutting machine, numerical controlled steel bar bending machine, steel
bar mesh forming machine, steel bar cage forming machine, steel bar
connection head making machine, steel bar cold processing equipment and
other auxiliary equipment.
3.
Project’s significance and necessity
Construction of reinforced concrete structure building project is
devided into three parts: Concrete, steel bar and steel mould board. The
developing of these three parts reflects the level of building
industrialization and construction technology in a country. The target
of commercial processing and delivering steel bar is to change our
backward situation of scattered processing of steel bar and to realize
specialized and in a large scale run of steel bar processing as a base
for implementction of advanced construction technik. This can be
certainly to raise the project’s quality, reduce the project’s cost,
raise the level of mechanized construction, and increase the economical
and social efficiency to meet the requirement of social development.
3.1
Building industry needs urgently commercial processed and delivered
steel bar.
1)
The necessary for development of country’s fundamental construction
Building industry has been place in the one of the four industrial
mainstays in the country’s economics. During “Tenth Five” the major
investonent is still in the fundamental installations and residential
building industry. Until 2005 the highway length reached 1.5 million km,
train 75000 km, the harbor docks along the coast 1500, airports 150;
before 2010 the real estate industry will grow continuously, in 2002 the
buildings completed are for 110217 m2(housing is 57.8% in
city and town); in 2005, that will reach 134000 m2 which will
use steel 103.18 million tons. In 2010, that will reach
160000 m2, use steel 123.20 million tons. Large scale
construction projects provide vast market needs for steel bar products.
2)
The necessary for development of building structure and new technik
Since reform and open to outside the fundamental installations of
residential industry, power energy and communication grow continuously,
the span and scale of reinforced concrete structure increase
continuously, the requirement for life of usage of building and
structure, for anti-earthquake, for enegy saving, for material saving is
higher, therefore difficulty for construction is increased. For all of
these the traditional way of working on site by manpower cannot be
adopted. Only commercial steel bar processing and delivering center can
satisfy the requirement for the development of building structure and
new technik. In 1999 the well-known document No.72 issued by office of
the State Council required to develop and porularize actively the new
technik, new equipment, new process and to complete the technik service
on construction site and to realize providing for a complete set.
3)
The necessary for raising project’s quality and reducing project’s cost.
Steel bar commecial processing and delivering is based on specialization
of steel bar processing, which adopts advanced technik and equipment to
process in largse scale, through market competetion to promote the
growing of steel bar processing enterprises. There is a contract
relationship between users and enterprises that steel bars are processed
by advanced technology in specialized equipment, on construction site it
is only to manage and dispatch, simplifying the operation, reducing the
waste, cutting largely the manpower, shorting the construction period,
reducing the cost, facilitating quality check to avoid misuse of
materials and ensure the quality and largely reducing the difficulty for
management.
4)
The necessary for energy saving and environment protection
The traditional way is processing on site that is operated by hands,
having high rate of rejects. Large quantity of materials on site and
noise, dust powder due to on site processing interfers with people and
pollutes the environment.
Using commercialized steel bar can save resources and protect
environment.
5)
The necessary for reform of management system of construction enterpries
For a long time our building construction depends on large quantity of
manpower and hand operation which has low efficiency. At present our
building enterprises are carrying on the reform, establishing the
managing system suitable for socialist marketing economics, changing the
“big and complete”, “small and complete”mould, changing background
situation of construction, making specalizaed working and in large scale
run. Construction enterprises are transforming from labour concentration
type to specialized construction management type. The development of
steel bar commencial processing and delivering project meets the need of
reform of building construaion enterprises.
6)
The necessary for connection with interational market.
At present foreign building company takes only 2% of domestic market
share.
After entering WTO, domestic market will open to outside to some extent,
as a result foreign contractor and steel bar company will enter domestic
market more. This will promote technical progress in our building
industry but also impact our building construction enterprises.
Therefore, development of steel bar commercial processing and delivering
center will meet requirement of market, promote technical progress of
domestic construction enterprises and steel bar manufacturing and
processing enterprise, facilitating their participation of international
competetion.
3.2
Steel bar commercial delivery will bring about new opportunity for
metallurgical industry
After entering WTO，domestical
metallurgical industry faces a severe challenge, market competition home
and abroad is even intensive, many company’s profit reduced. One of
major contents of “Tenth Five”plan for metallurgical industry is
requlation of the industrial structure to let metallurgical enterproise
“reduce output, increase profit”, limit output of steel products which
have low profit, high waste and lack ability of competition, increase
output of new steel products with high technik and high added value. For
the steel bar manufactures, they can form the steel bar processing and
delivering center using their advantages (fundametal facilities,
abundant raw materials) to develop deep processing project of building
steel bar, providing directly steel bar products to construction site
instead of traditional sales of raw materials. This manner is not only
increasing the added value of peoducts of metallurgical enterprises to
create new economic growing point, but also rising the service quality
for building industry.
4.
Project’s advantages——Comparison between modern steel bar
processing and delivering center and traditional processing on site
―Reduce the cost: Commercial steel bar can be made from common steel
matericals (non-standard length steel bar, the price is lower than
standard length one for 200-300yuan/ton), obviously reducing the waste
of raw materials, saving all kind of cost; —Using of modern automatic
steel bar processing equipments reduces largely the cost of manpower,
let working efficiency per worker be raised 8-10 times
in average.—Reducing material’s waste rate and energey consumption.
—Production management system comtrolled by computer can reduce the
errors in the production almost to zero without losses.
5.
Project investment suggestion
This project just begins in our country and knowledge of this new
provide organization is not clear enough by the market. In addition,
because of high automatic level of major equipments we don’t have enough
experiences and knowladge of these equiments. These kinds of equipment
and technik just begin to develop in our country. Our Institute starts
to develop a complete set of automatic building steel bar processing
equiment at first in the country in cooperation with Italian . We can provide a complete set of reliable equipment, technik and
project’s solution; We are familiar with domestic condition of market
and technik, having ability to layout the project, making reasonable
technological design, having ability to do local technical support,
aftersales service and coorporation to ensure normal operation of the
project and provide fast, low cost service, provide production
management experences, training uers and related person; Project
provider should have domestic specialized technical support to ensure
the introduced production management system which must meets domestic
technik standard and must be compatible with related domestic design
software; The equipment provided must satify requirement of domertic
related stcundard; Provider also should be familiar with domectic
building market to surrort for user’s marketing promotion; We can help
user step by step to revise state and company’s buliding steel bar
standards for preparation of enlarging the production scale and
establishing more lcoations for steel bar processing in the future. |
