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Suzhou Sentong Photovoltaic Co., Ltd.

Service Hotline : +86-0512-57651633

Linkman : manager zhang

Phone : +86 13901565226

Fax : +86-0512-57651633

E-mail : szstpv-zyb@mystpv.com

Address : 838 Kunshan City, Palestinian cities and towns Cheng Road, Jiangsu Province

Solar energy aluminum production process and technology

2016-05-26 10:31:00 click:
Solar energy is an inexhaustible supply of new non-polluting green energy, is one of China's determined focus on the development of seven new industries, the battery plate frame and the support structure pillar, rod, the support legs, etc., can be used at present the most economical and durable aluminum alloy extrusion manufacturing, aluminum alloy is a new market applications, and has been implemented worldwide application. The following briefly describes the solar photovoltaic manufacturing process of aluminum production technology and key node for reference.
 
2. Optimize the design and manufacture of aluminum extrusion dies
 
Extrusion die is an important tool for solar photovoltaic aluminum product shape, dimensional accuracy guarantee. Extrusion die design and manufacturing quality extrusion is to achieve high-quality, high yield, low cost, high efficiency, low cost of an important guarantee. Therefore, to manufacture high-precision aluminum extrusions PV, it is necessary to optimize the extrusion die design and manufacturing.
 
2.1 The use of advanced extrusion mold manufacturing equipment
 
Precision extrusion of advanced mold processing equipment is to ensure that the metal extrusion die eligibility prerequisite. Therefore, production of photovoltaic aluminum profiles should adopt advanced mold processing equipment, such as CNC, walking thread cutting, three-axis machining centers, EDM machining centers to improve the accuracy and performance of the mold.
 
2.2 rational arrangement of the die orifice
 
In order to ensure good PV aluminum symmetry, improve production efficiency and yield, the die orifice arrangement must comply with the principle of symmetry center, multi-die holes arranged symmetrically. Mold design process, will try to bridge site design in non-decorative surface of the profile, in order to avoid defects exposed.
 
2.3 Optimization of extrusion die design belt
 
Working with a partial guarantee stable product size and product surface quality. Working with the design of the mold length, to minimize the gap, to be gentle on the length change, and promote the use of angle and hinder the flow angle to reduce the flow rate of the metal, the metal reached a uniform flow profile and improve surface quality.
 
3. Chemical Composition Control
 
6063 aluminum alloy materials for production, control of its chemical composition as shown in Table 1.
 
Practice shows that 6063 has become an important choice of photovoltaic production of high precision aluminum profiles. 6063 aluminum alloy case of Al-Mg-Si system can be heat strengthened aluminum alloy strengthening phase Mg2Si, good extrusion properties and low quench sensitivity, high-temperature plastic, and a wide range of quenching temperature, the critical quench rate is small. 6063 aluminum alloy composition within the range specified in the national standard GB / T3190, the values ​​of the chemical composition of different material properties will be different when the chemical composition range is large, the performance difference will fluctuate within a wide range so that the overall performance profile will be difficult to control. In order to ensure precision aluminum extrusions photovoltaic, will
 
Shall be in strict accordance with the enterprise control standards to determine the chemical composition of the alloy.
 
4. melting, casting and ingot homogenization process
 
4.1 smelting, refining
 
Rotary regenerative melting furnace melting, melting temperature 720-760 ℃. At temperatures above 720 ℃ high purity nitrogen blowing refining agent refining 15min, refining agent in an amount of 0.08% by weight of the melt after refining electromagnetic stirring 15min, aluminum was allowed to stand 20-30min. Sampling and testing strictly control the chemical composition of the molten aluminum alloy, the mechanical properties of the material to achieve the desired.
 
4.2 Casting
 
Semi-continuous direct water cooling casting method. Cooling intensity direct water cooling method is large, the cooling speed, the cast structure refinement, increased density of tissue, thus improving the mechanical properties and heat treatment of ingot effect. Controlled casting temperature 710-730 ℃, casting speed 50-70mm / min, cooling water pressure 0.1-0.3MPa. To reduce heat cracking tendency, improve the chemical composition of the alloy, using online addition of aluminum titanium boron wire, add speed 1700-2000mm / min.
 
4.3 cast rod homogenizing treatment organization
 
In order to reduce and eliminate segregation within the crystal ingot, improve its chemical composition and structure of the non-uniformity of the aluminum alloy casting rods homogenization process. Technical condition control is to cast rod was heated to 540-550 ℃, insulation 8-10h, released strong wind cooling and mist cooling. After homogenization should speed up the cooling, in order to ensure uniformity after Anodizing color.
 
5. Squeeze technology conditions and aging process control
 
Technology condition of extruded aluminum alloy 6063, online quenching and aging, and take control of the casting rod heating temperature: 440-480 ℃; mold heating temperature: 450-480 ℃, mold heating time is less than 5h; Extrusion heating temperature of 460 -500 ℃; extrusion speed: 12-18m / min; spout temperature 510-550 ℃; cooling mist cooling air or online; the aging treatment after extrusion line quenching: control the temperature of 200 ± 5 ℃, holding time: 3h. Solution treated 6063 aluminum alloy and extrusion process combined avoid grain growth and improve the physical and mechanical properties of the profile of the product.