Aluminum
foil rolling before changing tension (σ1) and back tension (σ0) values ??the role swap thick vary greatly. Equivalent tension on the change before and after the impact of foil thickness , tension before tension is much smaller than the rear , but the tension σ1 right before being rolled foil flatness there is a huge impact . To ensure the quality of the finishing machining processes , hoping to specify a minimum tension of the first , so in fact before the tension σ1, is used as a parameter for adjusting thickness , before the dynamic tension control accuracy is usually ± 5 % range.
In contrast, after the tension in thick foil rolling tone is very clear and important role , as compared with the speed of adjustment thick , thick with tension adjustment rapid and sensitive features. However, by changing the material thickness of the back tension adjustment tank , the tension by adjusting the amount of stable rolling process flow conditions. Excessive tension is likely to cause breakage of aluminum .
The rolling passes , in order to improve production efficiency are generally used close to the maximum design speed of the rolling mill . Currently , the pass can already use the normal speed rolling up to 2500m/min . At this point the tension can only be used to fine-tune fine-tuning approach thickness difference . So the mill thick tone system design, electronic control system must be increased tension regulation accuracy. But also to set up high-precision tension measuring roll , used to directly measure the tension .
In foil rolling production of all passes , the tension adjusting thick links actually can participate thick droop . The design tension control adjustment range pass 30% of a given tension within the thick tone to meet the requirements .
2013年10月25日星期五
Aluminum staining common problems and solutions
One , not color dye
1, the anodic oxide film thickness is insufficient. The solution is to check whether the anodizing process specifications, see the temperature , voltage, electrical conductivity and other factors are stable , if unusual , adjust the specification , without exception , may be extended oxidation time , to ensure compliance thickness .
2, the dye high pH , time, glacial acetic acid and the pH was adjusted to the specified value .
3 , after oxidation workpiece placed in the sink too long . Promote dyeing time , if this condition has occurred , the workpiece can be placed in the anodizing bath and the bath or nitric acid activation treatment after appropriate for dyeing , the effect will be good.
4 , the choice of dye properly. Need to choose a suitable dye.
5 , the dye is decomposed or mildew , this time in need of replacement dyes.
6, the oxidation temperature is too low , leading to dense film . May be appropriate to increase the oxidation temperature .
7 , poor conductivity . Anode or cathode rods may stereotype bad batch shown poor conductivity . Pay attention to cleaning the anode and the cathode rods stereotype , to ensure good contact.
Two , white point ,
1 , washing is not clean , we should strengthen water.
2 , the water used for washing dirty , polluting the film , you should replace the water , to ensure the quality of washing .
3 , the oxide Aluminum Film by the dust in the air , acid, alkali fog contamination. Strengthen washing, dyeing and timely , timely transfer substantially relieve this symptom.
4 , the oxide film by oil , perspiration pollution. The need to strengthen protection, can not touch the exterior surface of the workpiece .
5 , there is no dye dissolved impurities , by the oil pollution , disruption of normal coloring , this time should be filtered or replaced dye .
6 , the workpiece gap , there is residual acid outflow hole for such work to strengthen the water.
7 , by Cl- dye contamination caused pitting piece dyeing , the dye must be replaced , usually during the operation should be taken to avoid the introduction of impurity ions .
Third, the light color , color
1, the film thickness unevenness . Possible reasons anodizing bath temperature , density unevenness , response bath stirring compressed air to substantially solve this problem .
2, the temperature of the dyebath or uneven density . Into mixing process .
3 , dyeing too fast. First into the bottom of the workpiece and the last to leave the dye in the dye , so the bottom of the most easily stained . The solution is to dilute the dye , an appropriate extension of the dyeing time .
4 , poor conductivity . May be caused by loose hanging , hang tight attention to avoid such problems.
5 , the dye is too thin, the dye may be added to improve the density.
6, the dye temperature is too low . Can give less dye was heated to 60 ℃ .
7, the dye is dissolved improper , or floating in the insoluble dye , which is easy to produce this color. The solution is to improve the dye dissolved.
Four , dyeing blur, color escape
1 , dye low pH , can dilute ammonia transferred to the specified value .
2 , cleaning is not clean. Washing should be strengthened .
3 , the dye does not dissolve completely , enhanced dissolution caused completely dissolved.
4, the dyeing temperature is too high , reduce the temperature.
5, the oxide film is small pores , because the oxidation temperature is too low , inhibiting coating is dissolved in sulfuric acid , may be appropriate to increase the oxidation temperature to avoid this problem .
6 , dyed color fast, and dyeing time is too short , adjustable dilute dye , reduce dyeing temperature , appropriate to extend the dyeing time .
7, the sealing temperature is too low , heating solution .
8 , sealing pH value is too low, with dilute ammonia raised to the specified value .
9 , stained surface is easy to wipe off . Mainly rough coating , generally caused by the oxidation temperature is too high . Should pay attention to control the oxidation temperature in the specification range.
1, the anodic oxide film thickness is insufficient. The solution is to check whether the anodizing process specifications, see the temperature , voltage, electrical conductivity and other factors are stable , if unusual , adjust the specification , without exception , may be extended oxidation time , to ensure compliance thickness .
2, the dye high pH , time, glacial acetic acid and the pH was adjusted to the specified value .
3 , after oxidation workpiece placed in the sink too long . Promote dyeing time , if this condition has occurred , the workpiece can be placed in the anodizing bath and the bath or nitric acid activation treatment after appropriate for dyeing , the effect will be good.
4 , the choice of dye properly. Need to choose a suitable dye.
5 , the dye is decomposed or mildew , this time in need of replacement dyes.
6, the oxidation temperature is too low , leading to dense film . May be appropriate to increase the oxidation temperature .
7 , poor conductivity . Anode or cathode rods may stereotype bad batch shown poor conductivity . Pay attention to cleaning the anode and the cathode rods stereotype , to ensure good contact.
Two , white point ,
1 , washing is not clean , we should strengthen water.
2 , the water used for washing dirty , polluting the film , you should replace the water , to ensure the quality of washing .
3 , the oxide Aluminum Film by the dust in the air , acid, alkali fog contamination. Strengthen washing, dyeing and timely , timely transfer substantially relieve this symptom.
4 , the oxide film by oil , perspiration pollution. The need to strengthen protection, can not touch the exterior surface of the workpiece .
5 , there is no dye dissolved impurities , by the oil pollution , disruption of normal coloring , this time should be filtered or replaced dye .
6 , the workpiece gap , there is residual acid outflow hole for such work to strengthen the water.
7 , by Cl- dye contamination caused pitting piece dyeing , the dye must be replaced , usually during the operation should be taken to avoid the introduction of impurity ions .
Third, the light color , color
1, the film thickness unevenness . Possible reasons anodizing bath temperature , density unevenness , response bath stirring compressed air to substantially solve this problem .
2, the temperature of the dyebath or uneven density . Into mixing process .
3 , dyeing too fast. First into the bottom of the workpiece and the last to leave the dye in the dye , so the bottom of the most easily stained . The solution is to dilute the dye , an appropriate extension of the dyeing time .
4 , poor conductivity . May be caused by loose hanging , hang tight attention to avoid such problems.
5 , the dye is too thin, the dye may be added to improve the density.
6, the dye temperature is too low . Can give less dye was heated to 60 ℃ .
7, the dye is dissolved improper , or floating in the insoluble dye , which is easy to produce this color. The solution is to improve the dye dissolved.
Four , dyeing blur, color escape
1 , dye low pH , can dilute ammonia transferred to the specified value .
2 , cleaning is not clean. Washing should be strengthened .
3 , the dye does not dissolve completely , enhanced dissolution caused completely dissolved.
4, the dyeing temperature is too high , reduce the temperature.
5, the oxide film is small pores , because the oxidation temperature is too low , inhibiting coating is dissolved in sulfuric acid , may be appropriate to increase the oxidation temperature to avoid this problem .
6 , dyed color fast, and dyeing time is too short , adjustable dilute dye , reduce dyeing temperature , appropriate to extend the dyeing time .
7, the sealing temperature is too low , heating solution .
8 , sealing pH value is too low, with dilute ammonia raised to the specified value .
9 , stained surface is easy to wipe off . Mainly rough coating , generally caused by the oxidation temperature is too high . Should pay attention to control the oxidation temperature in the specification range.
2013年10月23日星期三
Anodized aluminum surface stained Causes of Flooding
Resulting Anodized Aluminum surface flooding after staining were the following main reasons:
1 piece caustic pre-treatment is not thorough enough.
(2) low melt temperature dyeing.
3 staining solution surface oil.
4 film did not retire net rework.
5 oxide film is contaminated.
6 After oxidation washed thoroughly enough, not cleaned.
7 aluminum anodizing current density is too large.
8 anodizing solution temperature is too low, the current density is too small.
9 aluminum anodizing solution temperature.
1 piece caustic pre-treatment is not thorough enough.
(2) low melt temperature dyeing.
3 staining solution surface oil.
4 film did not retire net rework.
5 oxide film is contaminated.
6 After oxidation washed thoroughly enough, not cleaned.
7 aluminum anodizing current density is too large.
8 anodizing solution temperature is too low, the current density is too small.
9 aluminum anodizing solution temperature.
Embossed aluminum strip in the clever use of technology
Aluminum Strip is embossed craft new production equipment, has a hard texture solid materials, high precision, good resistance to deformation, pressure, etc., to achieve the letterpress process standardization, improve work efficiency and quality of printing, providing a more reliable guarantee.
Routinely use in letterpress letterpress printing process is generally used aluminum strip version of the heart, fill materials and gear version edges. In addition to its use can be extended to the version prop up the application process to achieve a multi-purpose. Printing process printing small-format illustrations, masthead, its traditional production process, are generally used as a plywood version of care, but this version of care owed to a solid and easy to deformation, as well as prints often appear burrs and blur phenomena.
Therefore, this version of the prop is difficult to re-use, waste of valuable timber resources. Based on the above, if the height (the thickness of the aluminum is) less than the aluminum strip, after the booster clever, zinc paste can be used for printing plates or resin plate. The original thickness of the aluminum strip with empty aluminum is almost the same height, to be entrusted with the purported print edition, and its thickness is clearly not enough.
If using the cardboard bottom aluminum pad to pad printing several layers to achieve the desired height, the printing pressure is due to a solid, affect the printing quality. Such as the use of space in an appropriate thickness of lead, with double-sided tape to paste it directly into the back of the aluminum tray method, so long as the aluminum strip at each end of a blank sticky lead weights can be achieved by printing the desired height. Because aluminum strip is thick and hard, the middle of no pad affixed hanging segment printing pressure can still maintain a uniform state.
Article purported version using aluminum prop used, can facilitate and improve the layout printed pieces small group version and installed version efficiency, but also improves the printing quality is better, and the version of the prop can be repeatedly used, the application effect is satisfactory.
Routinely use in letterpress letterpress printing process is generally used aluminum strip version of the heart, fill materials and gear version edges. In addition to its use can be extended to the version prop up the application process to achieve a multi-purpose. Printing process printing small-format illustrations, masthead, its traditional production process, are generally used as a plywood version of care, but this version of care owed to a solid and easy to deformation, as well as prints often appear burrs and blur phenomena.
Therefore, this version of the prop is difficult to re-use, waste of valuable timber resources. Based on the above, if the height (the thickness of the aluminum is) less than the aluminum strip, after the booster clever, zinc paste can be used for printing plates or resin plate. The original thickness of the aluminum strip with empty aluminum is almost the same height, to be entrusted with the purported print edition, and its thickness is clearly not enough.
If using the cardboard bottom aluminum pad to pad printing several layers to achieve the desired height, the printing pressure is due to a solid, affect the printing quality. Such as the use of space in an appropriate thickness of lead, with double-sided tape to paste it directly into the back of the aluminum tray method, so long as the aluminum strip at each end of a blank sticky lead weights can be achieved by printing the desired height. Because aluminum strip is thick and hard, the middle of no pad affixed hanging segment printing pressure can still maintain a uniform state.
Article purported version using aluminum prop used, can facilitate and improve the layout printed pieces small group version and installed version efficiency, but also improves the printing quality is better, and the version of the prop can be repeatedly used, the application effect is satisfactory.
2013年10月16日星期三
Aluminum maintenance, installation and maintenance
Aluminum products, with high strength , light weight , corrosion resistance, novel structure, easy assembly , timber saving , durable features , clams is unreasonable maintenance, installation and maintenance of aluminum extrusion products will also affect the appearance, surface color. It should be the correct care and maintenance methods .
1, the Aluminum Alloys in the handling process , you must gently , causing the surface to prevent the bump bumps, affect the surface appearance ;
2 , aluminum during transport must be covered with a tarpaulin to prevent rain , snow intrusion ;
3 , aluminum containers in a dry , bright, well-ventilated , non-corrosive climate , but should prevent rain, water, snow intrusion ;
4 , aluminum in storage , the bottom of the floor must skids are kept to the ground distance greater than 10CM;
5 , aluminum in storage , is strictly prohibited and chemical materials and wet materials stored together ;
6 , aluminum during the installation process , the surface must be affixed waterproof tape , contact with the wall of the frame material, must ensure that the surface profile of the oxide film and the film is not destroyed , but use a qualified cement , sand ;
7 , processed into doors, windows , the regular use of clean cloth and mild detergent to clean the aluminum surface .
1, the Aluminum Alloys in the handling process , you must gently , causing the surface to prevent the bump bumps, affect the surface appearance ;
2 , aluminum during transport must be covered with a tarpaulin to prevent rain , snow intrusion ;
3 , aluminum containers in a dry , bright, well-ventilated , non-corrosive climate , but should prevent rain, water, snow intrusion ;
4 , aluminum in storage , the bottom of the floor must skids are kept to the ground distance greater than 10CM;
5 , aluminum in storage , is strictly prohibited and chemical materials and wet materials stored together ;
6 , aluminum during the installation process , the surface must be affixed waterproof tape , contact with the wall of the frame material, must ensure that the surface profile of the oxide film and the film is not destroyed , but use a qualified cement , sand ;
7 , processed into doors, windows , the regular use of clean cloth and mild detergent to clean the aluminum surface .
Aluminum features, applications and sources
Aluminum is a silvery white light metal , a very wide range of applications , known as the second metal , its production and consumption is second only to iron and steel . Bo is the density of aluminum 2 .7 × 103kg / m3, about steel l / 3. When the cross-sectional area and length are the same, the conductivity of copper aluminum 64 %, if calculated by mass , its conductivity is 200% copper , good thermal conductivity . As can be formed on the surface of a solid layer of thin aluminum oxide film , can prevent further oxidation , therefore , the aluminum in the atmosphere , water and some corrosive medium high corrosion resistance . Aluminum, plastic, easy to withstand pressure processing, can be drawn into filaments or pressed into thin slices ; while being able to make it through the cold and hardened alloy .
Aluminum is characterized by a low density , high specific strength (strength to density ratio ) , but also has good ductility and corrosion resistance. In addition, most of the aluminum alloy can be enhanced to the heat treatment method . According to their composition and production process, aluminum can be divided into deformable aluminum and cast aluminum . Which can be wrought aluminum alloy hot rolled , cold rolled , stamping , extrusion , bending, curling and other mechanical processing, so a wider use . Rust-proof aluminum alloy can be divided into (A1-Mn and Al-Mg based alloy ) , hard alloy (Al-Mg-si and Al? Cu-Mg alloy ) , hard aluminum (A1-Zn-Mg-cu alloy ) , wrought aluminum (Al-Mg-si-cu -based alloys) .
Aluminum and Aluminum Alloys , mainly used in the construction industry , the production of windows and doors , partitions , ceiling, and outdoor decoration ; in the aerospace and defense industry sectors are also widely used aluminum alloys, manufacture of aircraft , ships , guns , etc. ; in power transmission , commonly used high strength steel wire reinforced aluminum cables for overhead lines ; addition , automobile manufacturing, container transport, daily necessities , household appliances , machinery and equipment and other fields have extensive use of aluminum and aluminum alloys .
With the production, consumption increases, the amount of waste aluminum products is also growing , and many are single-use aluminum products , products made to the product from the loss of use value is shorter, and therefore its disposal miscellaneous materials into the source of contamination . Meanwhile, aluminum and aluminum alloy is a kind of high environmental load materials , production requires a lot of power , therefore, how to make the best recycling of scrap materials, both the economic development needs, but also environmental protection requirements.
Miscellaneous scrap material stems from its wide range of applications . Differs in its use led to its composition, properties are quite different to the scrap material recycling and reuse create great difficulties . In order to cost less exhausted recycled aluminum , and to ensure the quality of recycled aluminum can continue to meet a variety of needs , the classification of scrap for recycling is very important. If you do not classify cleaning , screening and blind remelting , recycled product is not working, there may even become garbage again . To this end, the advanced industrial countries have developed a corresponding scrap standards or professional standards. For example, Japan's National Institute of Standards JIS (H119) based on aluminum scrap alloy type , recency , shape, divided into 28 kinds of sources , and the secondary alloy manufacturing processes and quality assessment have corresponding regulations.
Aluminum is characterized by a low density , high specific strength (strength to density ratio ) , but also has good ductility and corrosion resistance. In addition, most of the aluminum alloy can be enhanced to the heat treatment method . According to their composition and production process, aluminum can be divided into deformable aluminum and cast aluminum . Which can be wrought aluminum alloy hot rolled , cold rolled , stamping , extrusion , bending, curling and other mechanical processing, so a wider use . Rust-proof aluminum alloy can be divided into (A1-Mn and Al-Mg based alloy ) , hard alloy (Al-Mg-si and Al? Cu-Mg alloy ) , hard aluminum (A1-Zn-Mg-cu alloy ) , wrought aluminum (Al-Mg-si-cu -based alloys) .
Aluminum and Aluminum Alloys , mainly used in the construction industry , the production of windows and doors , partitions , ceiling, and outdoor decoration ; in the aerospace and defense industry sectors are also widely used aluminum alloys, manufacture of aircraft , ships , guns , etc. ; in power transmission , commonly used high strength steel wire reinforced aluminum cables for overhead lines ; addition , automobile manufacturing, container transport, daily necessities , household appliances , machinery and equipment and other fields have extensive use of aluminum and aluminum alloys .
With the production, consumption increases, the amount of waste aluminum products is also growing , and many are single-use aluminum products , products made to the product from the loss of use value is shorter, and therefore its disposal miscellaneous materials into the source of contamination . Meanwhile, aluminum and aluminum alloy is a kind of high environmental load materials , production requires a lot of power , therefore, how to make the best recycling of scrap materials, both the economic development needs, but also environmental protection requirements.
Miscellaneous scrap material stems from its wide range of applications . Differs in its use led to its composition, properties are quite different to the scrap material recycling and reuse create great difficulties . In order to cost less exhausted recycled aluminum , and to ensure the quality of recycled aluminum can continue to meet a variety of needs , the classification of scrap for recycling is very important. If you do not classify cleaning , screening and blind remelting , recycled product is not working, there may even become garbage again . To this end, the advanced industrial countries have developed a corresponding scrap standards or professional standards. For example, Japan's National Institute of Standards JIS (H119) based on aluminum scrap alloy type , recency , shape, divided into 28 kinds of sources , and the secondary alloy manufacturing processes and quality assessment have corresponding regulations.
2013年10月11日星期五
Aluminum and embodies the advantages of traditional manufacturing materials
Aluminum, is rod by hot melt extrusion, to obtain different cross-sectional shapes of an aluminum material. So with the traditional mechanical manufacturing aluminum materials, what advantages do?
Aluminum compared with traditional mechanical manufacturing materials, such as carbon steel and stainless steel materials, the use of high-strength industrial aluminum extrusion has the following advantages:
1 Production process is simple: just design, cutting / drilling, combined to complete; while traditional materials typically have to go through the design, cutting / drilling, welding, sandblasting / surface treatment, surface coating and other complex processes.
(2) material can be reused: the use of industrial Aluminum Rod in the whole production process without heat welding, so the parts can be easily demolished, all materials and accessories can be reused; while cutting because of traditional materials and high deformation amount of cost and other reasons dismantling fact rarely reused.
3 save time: Since the production process is simple, can save a lot of cost of work; especially in the production of an error due rework than when using traditional materials can save hours of work several times.
4. Production of high precision: Since the production process has not experienced heat welding, materials, no distortion, so the assembly of high precision; while the use of traditional materials are heat welded to appear inevitable distortion, thus affecting the final assembly accuracy.
5 Look Gorgeous: use of industrial aluminum extrusion device look more modern, its unique anodized coating than the existing variety of coating method is more solid and stable.
Aluminum compared with traditional mechanical manufacturing materials, such as carbon steel and stainless steel materials, the use of high-strength industrial aluminum extrusion has the following advantages:
1 Production process is simple: just design, cutting / drilling, combined to complete; while traditional materials typically have to go through the design, cutting / drilling, welding, sandblasting / surface treatment, surface coating and other complex processes.
(2) material can be reused: the use of industrial Aluminum Rod in the whole production process without heat welding, so the parts can be easily demolished, all materials and accessories can be reused; while cutting because of traditional materials and high deformation amount of cost and other reasons dismantling fact rarely reused.
3 save time: Since the production process is simple, can save a lot of cost of work; especially in the production of an error due rework than when using traditional materials can save hours of work several times.
4. Production of high precision: Since the production process has not experienced heat welding, materials, no distortion, so the assembly of high precision; while the use of traditional materials are heat welded to appear inevitable distortion, thus affecting the final assembly accuracy.
5 Look Gorgeous: use of industrial aluminum extrusion device look more modern, its unique anodized coating than the existing variety of coating method is more solid and stable.
订阅：
博文 (Atom)