Removal of burrs

Automation of these operations is difficult due to the variability in shape of the burrs and the need to fix the casting easily and quickly. Nevertheless, automatic grinding machines are increasingly being used in serial production. Raw casting parts are inserted into such machines to produce suitably worked parts which do not need any retooling or further manual grinding work. 

Furthermore the following techniques are applied in automated lines  

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Incubation of wool with cellulases facilitated subsequent removal of burr with no chemical or physical damage to the wool. 

Ligninases Removal of burrs and other plant compounds from raw wool... 

In most cases, the removal of burr and cold-worked metal from the edge of the punched hole increases the hole expansion considerably. The hole expansion also increases with the increase in er and r, values and decreases with the increase in tensile strength. Inclusion shape control also improves hole-expansion performance. 

Specking n. The removal of burrs, knots, and other objects that impair the finished appearance of woolens and worsteds. 

Fig. 2.59 Total removal of burrs and other consumer-relevant flaws with HYDROPOX .

Unless the specified cleaning operations on their own can automatically provide for the following, the removal of burrs, notches, flares, fluxes, weld metal spatter, etc., should precede the specified surface cleaning. 

Deburring The removal of burrs that are formed during deformation or cutting operations. 

After the tubing is cut, remove all burrs and sharp edges from the inside and outside of the tube with a deburring tool. Figure 40.29. Clean out the tubing. Make sure no foreign particles remain. 

Remove all burrs and sharp edges from the shaft or shaft sleeve, including sharp edges of keyways and threads. Worn shafts or sleeves should be replaced. 

A careful inspection of both shaft ends must be made to ensure that no burrs, nicks, or scratches are present that will damage the hubs. Potentially damaging conditions must be corrected before coupling installation. Emery cloth should be used to remove any burrs, scratches, or oxidation that may be present. A light film of oil should be applied to the shafts prior to installation. Keys and key-ways (discussed in Section 59.3) also should be checked for similar defects and to ensure that the keys fit properly. Properly sized key stock must be used with all keyways do not use bar stock or other material. 

Cut the 9/32 Inch brass tubing to eight irtches long. Remove the burrs from the ends with a file, knife, or piece of sandpaper. 

Drill two rows of four 1/16 Inch holes between each set of wash ers, Drill completely through the tube. This will result In four rows of four, a total of sixteen holes between each baffle. Remove any burrs or metal chips from the interior of the tube with a thin file or a rolled up piece of sandpaper. 

Wrap a piece of tape around the 15/64" drill bit, 1-1/8 from the front. Carefully drill out the barrel to the depth of the tape mark, USe plenty of oil and don t let the hole become out of round. This drilling won t enlarge the barrel, it just removes the lands which cause the bullet to spin. It also removes the burrs caused by drilling the 1/8" holes. The undrilled portion of the barrel will still impart the needed spin, when the bullet reaches the drilled portion it is better to have the surface smooth to minimize bullet distortion as H passes the drilled holes. If a 15/64 drill is not a-vailable, a % may be used,... 

Cut a piece of the drain pipe 8 long. Use a scraper or sharp knife to remove any inside burrs and a file or sandpaper to smooth up the outer edge. Drill a V hole 1" from one end Cut a second piece of pipe V wide, and drill a h hole in the center of the side. Split one edge and file or cut out enough material to allow the V piece to fit snugly into the 8" piece. Remove all burrs and sharp... 

This work step is mainly required for the obtainment of equal adhesive layers. Here, particularly in the case of small adhesive surfaces as used for test purposes, it is necessary to remove the burr at the test specimen. In the case of larger adhesive surfaces, the rectification of the adherends is a prerequisite for parallel gluelines. 

Burrs are of great industrial relevance as they interfere with the workpiece performance and functionality. Ideally, workpieces would be free of burrs, but, as this is often not the case, burrs can only be reduced either by changing the machining parameters, tool path, or tool. Alternatively, the burrs will have to be removed by time consuming and expensive deburring processes. 

Laser cut edges of metallic materials should be completely or nearly completely free of burrs. In the instance of dross, it may be either a tenacious, hard to remove... 

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