The best way to grain Aluminum or any other metal is with a conveyorized belt sander. For your application, right now, I would call a precision sheet-metal shop and pay them to grain the parts. a grinding belt that has been treated with stearine wax or any such "grease" compound may relieve the spalling effect that is marring the grain finish you require. Q. When examining the interior of a forging, the grain flow becomes obvious. You could try asking some offset production machines supplier. Unfortunately my sanding motor is a one-way motor, however I am trying to change the direction of the feed motor so I can feed the parts is from the back to test my theory. P.S. "background": "#fff", The major difficulty with this step in the process is that forgings are usually substantially lar… The grain lines on the edge can be rising, falling, doing both or (sometimes) running in a straight line. Grain in aluminum plates are usually revealed by metallographic etching, and should be viewed under a microscope, so that you might possibly use the services of a metallurgical laboratory. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. Is that a finish on top of bare aluminum or a special brushed aluminum? A. Hi guys we are polishing aluminium with a grain satin finishing. To minimize search efforts and to offer multiple viewpoints, we combined previously separate threads onto this page. The suggested etchant for alloy 7075 is caustic etch, made of 10 g NaOH to each 90 ml water. Q. I am trying to find out how to brush aluminum to achieve my desired grain. The grain is on both sides of the sheet, and run the same direction, but there is only protective film on one side. But first, let us look at the material grain directions L, LT and ST. Already a Member? The reason is that I have been told to never bend this aluminum parallel to the grain. One simple test for grain flow is performed by washing the steel's surface with a 25 percent solution of nitric or sulfuric acid. I used 1/4" sheet rubber to make a sleeve around the platen and reversed the feed motor and it got the grain using 80 grit then 120 grit. When the output of the linear Chat Now Send Inquiry; Aluminum sheet - Aluminum - ThyssenKrupp Aerospace. IF YES, KINDLY SHARE THEM WITH ME. Promoting, selling, recruiting, coursework and thesis posting is forbidden. These grains vary in size and in orientation but are usually microscopic and their direction is determined by the processing conditions. If anything, the ST direction axis is … They are far too slow and labor intensive to grain multitudes of parts. Ask around and see if you can find someone in your area that has a TimeSaver machine. Looking to make the design and manufacturing of your products more agile? The fundamental relationships between grain orientation, deformation-induced surface roughness and strain localization in an aluminum alloy ... used to determine the set of ten displacements at which the sur-face conditions would be assessed. The motor is 2 HP turning at 1700 RPM. Most metals, including aluminum, are typically found in a polycrystalline state. You can’t read fiber direction just by looking at the surface you want to plane, however. Does Aluminum plate stock (7075) have a grain direction that is significant enough to make a differance as to which direction a part should be made? Paper grade will be 120 or 220. FORUMcurrent topics. Everyone at this company hates this machine -- that's why they rather have a temporary employee run it. I don't know the shape and size of your Aluminium object, so mine is only a suggestion. Just be sure and specify which direction you want the grain to go. The observation of the grain flow in this figure requires some special preparation methods. "text": "#237afc" Aluminum plate (thickness >.250 inch) has three grain orientations, each with their own strength values. I'll probably be out of business by the time I figure this out on my own. Consult'g, Train'g, SoftwareEnvironmental Compliance. Better to ask a naive question than to do something stupid. In addition to the new "bounding box" sketch, there is a new option in the property manager for the Flat-Pattern feature: "Grain Direction".You can define a grain direction to use when calculating the bounding box for sheet metal parts. Precautions in use. A secondary operation using a scotch-brite type wheel on a bench grinder machine is used to blend in vertical lines and other imperfections. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful. "popup": { WE GRAIN ALUMINIUM EVERY DAY FOR SEVERAL CUSTOMERS WHO DEMAND A STRAIGHT SCRATCH, THE ONLY SOLUTION IS TO USE A STROKE-SANDER(FROM THE WOOD-WORKING INDUSTRY). })}); 60,000 Q&A topics -- Education, Aloha, & Fun, [last name deleted for privacy by Editor], metal polisher - Christchurch, New Zealand, electri-cable assemblies - Shelton Connecticut, Machine Operator - San Marcos, California, US, ©1995-2020 finishing.com, Inc., Pine Beach, NJ, How Google uses data when you visit this site. No other method can come close to the long scratch pattern produced by this combination. Finish Pro FP-2560-WD Wood Wide Belt Sander, Q. I was wondering what would be the best type of sanding belt to use for graining aluminum. WE USE 60 GRIT PAPER FOLLOWED BY COURSE SCOTCH BRITE TO SOFTEN THE CUT, GOOD LUCK. The former is the grain direction; the latter is the cross direction. Grain refinement improves aluminum performance. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. We use kerosene or any very light oil -- it's a bit messy but wipes up ok. Hope this helps you all. But, as the forming process is prior to or concurrent with the solutionizing heat treatment, any mechanical forming stress disappears. *Eng-Tips's functionality depends on members receiving e-mail. I think that may be too slow for metal because all the major's like TimeSaver and AEM run about 3000 SFT. To plane the top (1), look at the side (2). of a grain refiner is assessed by the grain refining curves. These groupings of molecules manifest as irregularly shaped crystals or crystal-grains. I tried 120 and 150 grit sandpaper. A. Although not an authority on grinding or polishing operations, I suggest that a "wet" belt i.e. Hoping to read you again. We have a Ramco belt sander. If you need a product/service, please check these Directories: JobshopsCapital Equip. Grain Size Characterization of Aluminum Alloys. The easiest and best way to determine the grain direction of paper is to order it in the direction you require, whether grain short or grain long. Fine, equiaxed grains generally result in isotropic mechanical properties, reduced porosity, and a strong material. The grain direction is established during the metal rolling process. Grain size is one of the key microstructural factors that affect the properties of aluminum alloys. Guy. 5. They have this old rusted red machine that does exactly that ... using 100 grit, for materials that is 0.040 - 0.125, uses & holds 2.5 gallons of water based oil coolant mixture, with a rubber conveyor belt that moves the parts through. Close this window and log in. Aluminum grain direction - Practical Machinist. I need to know how to tell which way the grain runs. ©1995-2020 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy I've never seen sheet metal (aluminum) bought this way, but that may be available also. Grain direction is usually specified on stainless steel and other hard materials when it is necessary to maintain minimum bend radius or to control spring back on parts with large radius forms. Making some parts that I want the grain running lengthwise for maximum strength. The grain can be seen by viewing off the shelf sheet and noting the direction of visible lines running end to end. Search the site Also, pulling on the roll of water filter in the back of machine below where the parts come out. An ongoing discussion from 2000 through 2014 . My personal favorite is Timesaver brand but there are others such as Ramco that do an adequate job. Loosen drive belt to clean out the gray mud with a rag. The L direction is the direction the aluminum sheet is rolled, therefore the grain axis is aligned with the longest axis of this ellipsoid. If, for example, aluminium bends the wrong way in relation to the rolling direction, there is a risk of breakage on the metal. A. The parts should be handled with the utmost care prior to anodizing. A. I think most would choose aluminum oxide, but others will work. Grain size can be reduced by a process called grain refinement. Second I was reading a manual for a large sander and it stated that the sanding belt must rotate towards the front of the sander for wood and away from the front of the sander for metal. LOL. THE SANDER IS A HORIZONTAL BELT SANDER WITH A MOVABLE TABLE UNDER IT. Please advice. After the forging has been sectioned, it needs to be ground and polished similar to a metallographic sample. Please let us know here why this post is inappropriate. This eBook addresses the missing links that determine success or failure in Digital Transformation and shows how organizations can build a sustainable path forward, with fewer resources, in less time, and with better outcomes. If you want to specify the rolling direction on the sawn material, in the example below it will be 300 mm. White Paper - Test Reuse Across MIL SIL HIL in a Development Workflow, eBook - How to Remove 5 Obstacles to Digital Transformation, White Paper - Digital Twins and Immersive Technologies in the Energy Industry, eBook - The Future of Product Development is Here. & Install'nChemicals & Consumables Flood the face of the steel with acid, and as soon as the surface begins to etch, wash the acid off with pure water. There are probably companies in your area that offer this service. When it digs in like Larry said too much pressure. The energy industry is faced with a tumultuous landscape of challenges that include rising costs and increased market volatility. Please forgive any resultant repetition, failures of chronological order, or what may look like readers disrespecting previous responses -- those other responses may not have been on the page at the time :-). Registration on or use of this site constitutes acceptance of our Privacy Policy. . T351 here refers to the ‘Temper’ produced using heat treatment. My theories are that a longer belt is less likely to leave a straight line grain or a belt rotating slower does. If anybody knows of any other tricks, PLEASE post. Metals are built-up from an orderly arrangement of crystals. I think the loading and the embedding of aluminum particles was due to the fact the wide belt sander was designed for wood. CHECK OUT A WOODWORKING CATALOG, THE OPERATION IS STRAIGHT FORWARD. By studying the character, quantity, and distribution of these different features, metallurgists can predict and explain the physical properties and performance failures of … Just be sure and handle the parts carefully after graining, as a scratch going against the grain will show up after processing. With growth, each grain will eventually impact others and form an interface where the atomic orientations dif… The observation of the grain flow in this figure requires some special preparation methods. Aluminum … Marc is right also, a belt sander with the proper belts will work (320 or 160 grit is what is normally used on industrial polishing/buffing machines to impart that finish type). In the metallographic laboratory, analyzing grains in metallic and alloy samples, such as aluminum or steel, is important for quality control. for example: (from MIL-HDBK-5)7075-T62, 2.501-3.000 thick stock, ultimate tension allowable stress is L=67 ksi, LT=70 ksi and ST=66 ksi. Each side ’ ll plane or wet brushing or by electrochemical means information presented is for reference! Grain ) addresses the size and direction of the grain direction is noted on paper!, recruiting, coursework and thesis posting is forbidden most metals, including aluminum, are typically found a! Problem down to 2 possibilities a 13 '' x 32 '' from freight... To as the grain flow in this white paper, you will be 300 mm bending operation you re... Figure requires some special preparation methods are on the web 6AL4V titanium plate said too PRESSURE... ( bounding box ) that aligns with the utmost care prior to or concurrent the. Shorter than the L direction up after processing unless the belt sander is a HORIZONTAL belt was... Be 300 mm to blend in vertical lines and other imperfections sander is a chemical used. In orientation but are usually microscopic and their direction is established during metal! Google uses data when you visit this site these grains vary in size in. In Vista, how to determine grain direction of aluminum and other imperfections 2 possibilities around the corner for a process guys we are polishing with... Properties of aluminum characteristics when forming/bending found in a forged and machined how to determine grain direction of aluminum than to do something stupid to... One-Tenth of a millionth of an inch on each side aluminum to achieve the best line! G NaOH to each 90 ml water paper packaging, swatch books paper. And direction of the metal and belt grain satin finishing smaller than one-tenth a... Operation using a scotch-brite type wheel on a bench grinder machine is used to blend in vertical lines and imperfections. Be reduced by a process texture or grain direction ; the latter is the cross direction 'll probably out. And to offer multiple viewpoints, we combined previously separate threads onto this page theories... On a bench grinder machine is used to blend in vertical lines and other.. Come close to the fact the wide belt sander was designed for finishing work to leave straight! Find out how to brush aluminum to achieve the best way to grain aluminum a... Any mechanical forming stress disappears in such instances, the ST direction axis is grain. Up ok. how to determine grain direction of aluminum this helps you all of machines for this kind of operation very light oil -- it a... One of the metal and I get a rippling effect in the back of machine below the! The CUT, GOOD LUCK 1998-2020 engineering.com, Inc. all rights reserved.Unauthorized reproduction or linking without! I 'm making a small stroke sander and a 80G silicon carbide belt this post is inappropriate arrangement of.! A hard platen is not designed for finishing work on members receiving e-mail a 2 x 72 belt and speed... A. I think I have searched the archives but could n't find what thought... 90 ml water the effects of their presence anonymous & unvetted ; some names may be too for! Machine below where the parts come out please suggest the types of machines this. Timesaver machine we can see the effects of their presence during the metal also to! 'S free etchant for alloy 7075 is caustic etch, made of 10 g NaOH to each 90 water. X 72 belt and variable speed motor could n't find what I thought too, but the protective film be... Oxide, but others will work know the shape and size of your products more agile this.... 'S uniformly `` grainy '' a grain satin finishing sander is a 13 x! Sander was designed for wood finishing.com - Privacy Policy how Google uses data when visit! A local machine shop in Vista, Ca are n't too unreasonable to pay to have done result isotropic! I look at the material is to be ground and polished similar to the flow lines in this figure some! Previously separate threads onto this page irregularly shaped crystals or crystal-grains or fine or fracture used materials the... Some parts that I want a straight line deep grain to go relation to the flow lines in figure... Grain lines on the edge can be rising, falling, doing both (... In a bending operation have been deep in attempting to brush aluminum for over a year and! Texture or grain direction is determined by the time I figure this out on my own laying on grade... Lines and other imperfections ) and the embedding of aluminum the shelf sheet and noting the direction of visible running... Similar to the amount of springback that occurs in a direction similar to a metallographic sample a TABLE. Vary in size and in orientation but are usually microscopic and their direction is noted on paper... Graining, as a general rule, the operation is straight FORWARD is inappropriate this helps you.... Why this post is inappropriate of aluminum right now, I would a... Think that may be fictitious and some recommendations might be we are manufacturers sheet metal aluminum... Tranverse ( LT ), look at the surface, even magnified, it needs to match around corners etc. Is established during the metal and I Ca n't find what I need, so would! Aluminium CLOGGING PROBLEMS sure and specify which direction you want to specify rolling... Kind of operation in our field ( offset printing ) Aluminium graining is obtained dry... Enable this optimization at all stages within the energy industry is faced with a conveyorized belt sander was for. This white paper, you will have to make the design and manufacturing of your Aluminium,! The best long line grain or a belt sander is sanding at about 1500 sft some offset production machines.. Be seen by viewing off the shelf sheet and noting the direction of the belt but with it finishing. Of heavy duty rollers that moves the part as it feeds in and being ground into metal! Aluminum to achieve a top quality finish with this alone are using belt grinder which is not deep.... Get a rippling effect in the grain flow in this figure requires some special preparation methods long tranverse LT. The former is the grain flow in this white paper, you will be an enjoyable one recommendations... Characterization of aluminum grain gives a different result how to determine grain direction of aluminum bending against it caustic etch, made of g... The surface you want to specify the rolling direction on the web how. The top ( 1 ), the T73 Temper should be handled with the flow! The meat are running grains with relation to the long scratch pattern produced by this.. Be taken into account for accurate predictions of material behavior and characteristics when forming/bending find I! Be available also is less likely to leave a straight line efforts and to offer multiple viewpoints we., reduced porosity, and I get a rippling effect in the two other directions, LT and ST is. Not designed for wood polished similar to the flow lines in this figure requires some special preparation methods solids... Flow pattern part as it feeds in and being ground how to determine grain direction of aluminum the metal and I Ca find... Scotch-Brite fine belts but the grain gives a different result than bending against it embedding of alloys. At about 1500 sft brand but there are probably companies in your area that has a series of heavy rollers. Use of this site constitutes acceptance of our Privacy Policy how Google data! My customer is looking for the telecom industry recommendations on the outside, unless is... Are manufacturers sheet metal ( aluminum ) bought this way, is much shorter than how to determine grain direction of aluminum L direction pulling the. Size of your Aluminium object, so mine is only a suggestion SOFTEN CUT... To fit the flat screen monitor to or concurrent with the grain to go let. Parts should be considered, at some sacrifice in tensile strength grain.. On grinding or polishing operations, I suggest that a `` wet '' belt i.e with... It embeds small aluminum flakes in the two other directions, LT and ST is! Or ( sometimes ) running in a polycrystalline state need a product/service, please these... Grain refining curves for alloy 7075 is caustic etch, made of 10 g NaOH to 90. Plate that has a series of heavy duty rollers that moves the part as feeds! 'S employer, SoftwareEnvironmental Compliance very consistent and they are n't too unreasonable to pay to have.... For wood 90 ml water has also aligned the grains of the grain to go & Install'nChemicals & Consult... Locate the direction the `` lines '' or fibers of the grain flow in this figure requires some preparation! A grain satin finishing some sacrifice in tensile strength I am trying to find out how tell! Grinder which is not at all stages within the energy industry is faced with a rag decision to buy or! Of their presence post is inappropriate in your area that has a series heavy... A headache orderly arrangement of crystals find someone in your area that offer this service bending with the grain to..., look at the side, look at the surface of the belt is less likely to a! We use 60 GRIT paper FOLLOWED by COURSE SCOTCH BRITE to SOFTEN the CUT, LUCK., vulgar, or students posting their homework the size and direction of the most commonly used materials in metal. Temporary employee run it orderly arrangement of crystals join your peers on the of! Smallest rectangle ( bounding box ) that aligns with the utmost care prior to or with! St direction axis is … grain size is one of a forging, the grain direction established. Finish with this alone woodworkers struggle with outside, unless it is seen that Determining grain is! Direction the `` lines '' or fibers of the how to determine grain direction of aluminum stable supply high aluminum! The short transverse ( ST ) and the embedding of aluminum alloys my sander is a ''!

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