Aluminum-type Wall Thickness Standard Control and Quality Control-WJW Aluminum Supplier Aluminum

Editor: Guangdong WJW Aluminum Material Factory Co., Ltd.

[Abstract] The wall thickness of aluminum alloy building material is an important quality indicator that affects the quality of construction engineering. At the same time, it is an economic indicator that is related to the cost of construction engineering. In contrast, help manufacturers improve the understanding of national standards, industry standards and local laws and regulations on the wall thickness regulations of the wall thickness of aluminum alloy material, explore the reasonable control of aluminum alloy building material wall thickness in the production of aluminum profiles, improve the quality of construction projects, reduce the building of the building Engineering costs are of great significance for aluminum alloy building profile manufacturers.

[Subject Word] Formally measure wall thickness stress rod parts allows deviation

1 Overview

As an important raw material for construction engineering, aluminum alloy building profile plays a basic role in the national economic system. Due to the stimulation of the two major industries of automobiles and real estate, the output of Chinese aluminum alloy building materials has continued to rise. 390,000 tons, jumping to 2.74 million tons in 2002, an annual growth rate of 17%, which is much higher than the growth rate of domestic GDP in the same period. China Nonferrous Metal Processing Association predicts that the peak of consumption of aluminum aluminum will come after 2005, reaching the highest peak in 2022, and annual demand exceeding 10 million tons. However, at present, the domestic aluminum oxide industry is small in enterprise size, decentralized layout, high layout, high, high, high, high, and high layouts. The quality aluminum ore resources are made of "weakly" elbows such as inadequate. The shortage of aluminum oxide supply in China is expected to last until the end of 2006. Under the premise of ensuring the quality of the project, the wall thickness of the aluminum material is rationally controlled. The cost of construction engineering is of great significance to improve the market competitiveness of aluminum profiles. The wall thickness of aluminum alloy architecture is an important quality indicator that affects the quality of construction engineering. On the one hand, some aluminum -type material factories are closely profitable, the production of thin -walled profiles, disturbing the market, leaving quality and security hazards for construction projects, in order to facilitate market supervision and random inspections, inhibit the phenomenon of thin -walled walls, windows, and curtain wall profiles on the market. , To protect consumer rights, GB/T5237-2000 "Aluminum Alloy Building Profile" stipulates the minimum actual measurement wall of doors and windows and curtain walls. On the other hand, the engineering design units are calculated according to the conditions of the use of the profile. Some data are different from the GB/T5237-2000 "Aluminum Alloy Building Classification". How to fully understand the national standards, industry standards and local laws and regulations on the wall thickness regulations on the wall of aluminum alloy material, and reasonably control the wall thickness of aluminum alloy building materials in production.

2 GB/T5237-2000 "Aluminum Alloy Building Classification" related regulations

The author has discussed the provisions of the wall thickness in the GB/T5237-2000 "Aluminum Alloy Building Profile" with a number of aluminum profile manufacturers. Sexual regulations.

GB/T5237-2000 "Aluminum Alloy Architecture" stipulates that "the wall thickness difference between wall thickness in cross section and the wall thickness difference of the same surface with the same allowable deviation should be less than half of the corresponding wall thickness tolerance." This clause is applicable The condition is "the same size and allowable deviation of the wall thickness in the cross section". Under this condition, the maximum measured wall thickness and the minimum measured wall thickness should be less than or equal to the tolerance of the name size. The tolerance is the positive deviation The absolute value of the negative deviation, this clause can be understood as:

Maximum measured wall thickness-minimum measured wall thickness ( positive deviation negative deviation )/2

In the actual production process of aluminum profile squeezing, due to the influence of mold, extrusion equipment, and production process fluctuations, it is prone to uneven outflow speed of profile, and the wall thickness appears. On -site quality control,

In order to ensure the quality and safety of construction engineering, the GB/T5237-2000 "Aluminum Alloy Building Profile" stipulates that "when the profile is used as a force lever, the wall thickness of the profile should be selected according to the use conditions. The minimum measurement wall thickness of the force rod profile should be 1.2, and the minimum measured wall thickness of the stress rod material shall be 3.0. " That is, during engineering design, first to determine the minimum wall thickness required for the profiles in different occasions by calculating the size of the computing material on different use occasions. Then it should be clearly identified in the product design to identify the force lever and non -receiving rods. The standard note 1 pointed out that "the so -called stress rod refers to the pole parts in the door, the window structure, and the stress of the columns and beams of the curtain wall and the beams of the beam. Lever".

In order to minimize the impact of standard lag, Standard Note 2 clearly stipulates that when the "minimum measured wall thickness" specified in this standard is inconsistent with the latest regulations on aluminum doors, windows, and curtain walls The latest regulations for the national standard of the curtain wall. "GB/T8479-2003" Aluminum Alloy Window ", which was implemented on September 1, 2003, stipulated that" aluminum alloy window force components shall be tested or calculated. The minimum measurement wall thickness of the profile should be 1.4 ". The GB/T8478-2003 "Aluminum Alloy Gate", which was implemented on September 1, 2003. Article 5.1 stipulates that "the aluminum alloy door stress component should be tested or calculated. ".

Therefore, the minimum measured wall thickness of the main force rods for engineering buildings should be 1.4, and the minimum actual measurement wall thickness of the outer door profile for engineering building is 2.0. Generally, the outer diameter used by aluminum profile production enterprises on the spot quality test is usually accurate to 0.01. When the on -site detection minimum measured wall thickness is 1.35, in accordance with the GB/T8170 "Numerous Repair Rules", " The leftmost digit is 5, and when there are countless words on the right or 0, if the last number reserved is a strange number (1, 3, 5, 7, 9), one is one, and the number (2,4,6 6 , 8,0) Abandoned. "The repair is about 1.4, which meets the corresponding standards.

3 JGJ102-2003 "Glass curtain Wall Engineering Technical Specifications" related regulations

In order to enable the glass curtain wall project to be safe and applicable, advanced technology, and economical, the Ministry of Construction of the People's Republic of China released industry standards on November 14, 2003 "Glass curtain Wall Engineering Technical Specifications", which standardize the materials, design, production, production, production, production, production, production, production, production, production, production, production, production, production, production, production, production, production, Install construction and acceptance.

The wind pressure resistance of the glass curtain wall is determined by the method specified in the current national standard GB/T15227 "Method of the Wind pressure deformation performance testing of the building curtain wall". The wind -resistant performance of the curtain wall refers to the ability to maintain normal use function and not damage without any damage under the action of vertical wind loads with its vertical wind load. The level value of the curtain resistance of the curtain wall is that the relative deflection value of the main force bar or the support structure of the main force is reached the instantaneous wind pressure when the specified value is reached, that is, the instantaneous wind pressure in 3 seconds. The wind pressure resistance of the curtain wall should be greater than the standard value of the wind load it items.

Usually the beam span is small and the corresponding stress is also small. The Ministry of Construction stipulates that the thickness of the main force of the cross section of the beam should be in line with "when the span of the beam is not greater than 1.2m, the thickness of the main force of the aluminum alloy material section should not be It is less than 2.0mm; when the span of the beam is greater than 1.2m, the thickness of the main force parts of the section should not be less than 2.5mm. " In order to maintain the reliability of the direct stress screw connection and prevent the self -attack screw from being pulled off. When the force is connected, the local cross -section thickness should not be smaller than the nominal diameter of the screw when the screw is directly connected.

The thickness of the main force parts of the column section should comply with "the thickness of the section of the aluminum profile section should not be less than 3.0mm, and the thickness of the closed part should not be less than 2.5mm; Its local thickness should not be less than the nominal diameter of the screw. " The minimum value of the main force part of the column section is mainly based on the national standard "Aluminum Alloy Building Profile" GB/T5237 regulations on the minimum thickness of the curtain wall model of 3.0mm. The performance of local disability can use a small wall thickness, so the minimum wall thickness is 2.5mm of profiles.

In actual production, engineering design units often appear in accordance with the relevant provisions of the JGJ102-2003 "Technical Specifications for Glass curtain Wall Engineering", calculating the selected aluminum alloy material wall thickness does not reach GB/T5237-2000 "Aluminum Alloy Construction Property" regulations, resulting in production, resulting in production The manufacturer produces drawings according to customers, but it does not meet national standards. Because of the conflict between the standard clauses or is not suitable, the confusion of the manufacturer, engineering design units and customers of aluminum profiles. At the same time, due to the hard regulations on wall thickness, a considerable part of the aluminum resources are wasted.

4 DBJ 15-30-2002 "Specifications for the Design, Construction and Acceptance Specifications"

In order to meet the needs of construction engineering and make the performance of aluminum alloy doors and windows meet the requirements of building functions, to ensure the quality of the aluminum alloy doors and windows projects, for the climate characteristics of Guangdong Province and the actual situation of engineering construction, the Guangdong Provincial Department of Construction October 18, 2002, October 18, 2002 Daily promulgated the local standard DBJ 15-30-2002 "Specifications for the Design, Construction and Acceptance of Aluminum Alloy Doors and Winders" to regulate the design, construction and acceptance of industrial and civil building aluminum alloy doors and windows projects within Guangdong Province.

Compulsory clause 3.2.2 stipulates that "the wall thickness of the main type of aluminum doors and windows shall be determined or tested. Among them, the minimum measured wall thickness of the main force of the section of the door profile should not be less than 2.0, and the minimum actual measurement wall of the main force of the windows of the window type material shall be measured. The thick should not be less than 1.4 小 ".

For aluminum alloy profile manufacturers, aluminum alloy doors and windows are their downstream products. The next process is customers. Engineering design, construction and acceptance specifications are the basic requirements of customers, and they are prerequisite for the application of aluminum alloy profiles in doors and windows.

Therefore, in the design, production and quality test of the window profile of aluminum alloy doors, the main stress components of the main profile and section are clearly identified. The so -called main force component refers to the main profiles such as the middle horizontal frame, mid -vertical frame, fan tadpole and other main profiles of the doors and windows' own gravity and horizontal wind load, as well as combined doors and windows. The main force of the so -called cross -section of the profile, refers to the main parts of the connection part of the vertical and horizontal direction of loading forces in the cross section of the main profile of doors and windows, bearing the force of vertical and horizontal direction.

Clarify the main stress components of the main profile and section, and carry out targeted quality control in design and production. Cost with customer engineering manufacturing.

5 Standard about the hard specifications of aluminum -type wall thickness inappropriateness

(1) Quality definition perspective

ISO9000: 2000 "Quality Management System Basis and Terms" stipulates that the definition of "quality" is "the degree of inherent characteristics satisfaction requirements", "characteristic" is "distinguished features", "request" is "clearly, usually, usually, usually, usually, usually, usually, usually, generally, it is explicitly, usually, usually, usually, usually, usually, usually," The implicit or must be performed. "The wall thickness of the aluminum material is an important indicator of quality characteristics. The" request "is mainly reflected in customer requirements and engineering design needs. For customers, the wall thickness is greater than 1.4mm does not mean meeting the requirements. Under the premise of meeting the needs of engineering design, the wall thickness should be as small as possible, which is the good quality. For engineering design, the safety factors are related to the cross -section structure of aluminum profiles, doors and windows (curtain wall) structure, beam span, and glass area. The wall thickness requirements of aluminum materials should be changed according to the location and state of use. MM does not necessarily meet the safety needs, and less than 1.4mm can also meet the safety needs in a considerable part of the project. Calculating the wall thickness of aluminum material through engineering is the most scientific method.

(2) Energy angle

At present, China's GDP accounts for 1/30 of the world's total GPD, but the consumed steel accounts for 1/4 of the world's total, aluminum ingot accounts for 1/4, coal accounts for 1/3 The development of the economy is based on a large amount of energy consumption.

It stipulates that the wall thickness of aluminum material is stipulated, which improves the minimum aluminum consumption of some projects, and at a certain extent to a certain amount of energy, it will help the flames of energy.

Therefore, the standard hard stipulates the wall thickness of the aluminum material, which does not meet energy conservation, and cannot protect the interests of customers. It cannot meet the needs of engineering design. Essence

6

(1) When the profile is used as a force lever, the wall thickness of the profile shall be selected according to the conditions of use. The aluminum alloy doors and windows shall be determined by trial or calculation.

(2) Production enterprises should clearly identify the main profile and the main stress components of the cross -section during design, and the quality control of aluminum material wall thickness should be performed targeted in production.

(3) Fully understand the regulations of national standards, industry standards, local standards, and corresponding laws and regulations on controlling the wall thickness of aluminum materials. It not only ensures that the quality of the product meets relevant regulations, but also can reasonably control the cost of building engineering manufacturing.

references

[1] Zuo Hongqing, Chen Shichang, Lu Jiyan, etc., GB/T5237-2000 "Aluminum Alloy Building Classification", National Quality and Technical Supervision Bureau, China Standard Press published, 2000.12

[2] Huang Xiaokun, Zhao Xi'an, Jiang Qinghai, etc., JGJ102-2003 "Glass curtain Wall Engineering Technical Specification", Ministry of Construction of the People's Republic of China, China Construction Industry Press, 2003.111

[3] Yang Shichao, Shi Minxiang, Tan Guoxiang, Zhang Genxiang, DBJ 15-30-2002 "Specifications for the Design, Construction and Acceptance of Aluminum Alloy Doors and Winders", Guangdong Provincial Construction Department, 2002.10

[4] Ge Lixin, Wang Guojun, Li Ruishan, GB/T5237-2000 "Aluminum Alloy Building Profile" implementation guide, 2002

[5] GB/T5237-2000 "Aluminum Alloy Building Classification" standard review, "Quality and Technical Supervision", 2000.3

[6] Liu Damin, Shi Minxiang, Lu Jiyan, etc., GB/T8479-2003 "Aluminum Alloy Window", State Administration of Quality Supervision, Inspection and Quarantine, 2003.9

[7] Liu Damin, Shi Minxiang, Lu Jiyan, etc., GB/T8478-2003 "Aluminum Alloy Gate", State Administration of Quality Supervision and Inspection and Quarantine, 2003.9