automatic transfer machineHow to do when there are burrs in metal processing? Burrs in metal processing are problems that everyone will encounter, such as drilling, turning, milling, plate cutting...

One of the dangers of burrs is that they cut easily! In order to remove burrs, a secondary operation called deburring is usually required. 3 deburring and edge finishing of precision parts can account for up to 30% of the cost of finished parts. In addition, secondary finishing operations are difficult to automate, so burrs really become a tricky problem.

Everyone headache prone to burrs are here, in the process of feeding direction of burrs (entrance and exit burrs) side and cutting direction of burrs, how to solve the burrs?

automatic transfer machine How to do when there are burrs in metal processing? figure

01, chemical deburring

Chemical deburring is the use of chemical energy for processing, chemical ions will be attached to the surface of the parts, forming a film layer with large resistance and small conductivity, protecting the workpiece from corrosion, and burrs because they are higher than the surface, can be removed by chemical action. This deburring method is widely used in pneumatic, hydraulic, construction machinery and other fields.

02, high temperature deburring

First, the parts that need to be deburred are put into a tight sealed room, and then the whole part is sent into a certain pressure of hydrogen and oxygen mixture, ignition makes the mixture gas explode, release heat, burn the burr of the part, and will not hurt the part.

03, roll to remove burrs

The part is placed in a closed drum with the abrasive. During the rotation of the drum, the dynamic torque sensor, the part and the abrasive work together to produce grinding and remove burrs. Abrasives can be quartz sand, wood chips, alumina, ceramics and metal rings.

04, manual deburring

This method is more traditional and also the most time-consuming and laborious. It is mainly polished by hand with steel files, sandpaper, grinding and other tools. Now the most commonly used in production is the trimming knife.

05, process deburring

Edge rounding can refer to any action that removes the edge of a metal part. However, it is usually associated with the radius that creates the edge of the part.

The corners are rounded

Edge rounding does not simply remove sharpness or deburring, but breaks the edges of metal parts to improve their surface covering coating and protect them from corrosion.

Edge rounding machine includes:

Rotary file: Suitable for laser cutting, stamping or machining the edges of parts.

Manual grinder: Suitable for metal working projects that require grinding and edge rounding or deburring.

Special problems Burrs in milling parts

In milled parts, deburring is more complicated and more costly because milling at different locations of different sizes creates multiple burrs. It is important to select the correct process parameters to minimize burr size.

The main factors influencing the formation of end milling burrs

① Milling parameters, milling temperature, cutting environment, etc., will have a certain impact on the formation of burrs, and some of the main factors such as feed speed, milling depth, etc., are reflected by the plane cutting Angle theory and the tip exit sequence EOS theory.

② The better the plasticity of the workpiece material, the easier it is to form type I burrs. In the process of end milling brittle materials, if the feed rate or plane cutting Angle is large, it is conducive to the formation of type III burr (deficit).

(3) When the Angle between the end surface of the workpiece and the machined plane is greater than a right Angle, the formation of burrs can be inhibited due to the enhanced support stiffness of the end surface.

④ The use of milling fluid is conducive to the extension of tool life, reduce tool wear, lubricate the milling process, and then reduce the size of burrs.

⑤ Tool wear has a great impact on the formation of burrs, when the tool wear to a certain extent, the arc of the tool tip increases, not only the size of the burr in the direction of the tool exit increases, but also the type of burr in the direction of the tool cut.

Other factors such as tool materials also have a certain impact on the formation of burrs. Under the same cutting conditions, diamond tools are more conducive to inhibiting burr formation than other tools.

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