Deburring

In industry, deburring refers to processes for removing edges, splitters and fiber-optic elements on workpieces – the so-called ridges. The method serves on the one hand to ensure the operability of machine elements and on the other hand to reduce the risk of injury.
Processes of deburring are predominantly used in the metal and wood processing industry, but are also used in the production of plastic parts. Depending on the shape, material and dimension of the component, different methods are used for removing the burr.

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What is Grate like?
Grate arises in a variety of Production methods such as punching, milling or Turning . They express themselves in the form of undesired deformations on the component and are often visible as sharp edges on the contour of the workpiece. As a result of the exposed position at the edges of the component, burrs have a high risk of injury during processing and handling.

In the case of manufacturing processes, a distinction is made, inter alia, between the unburdened and the congratulating methods. While in the case of burrless methods such as the transverse roller the material deformation does not manifest itself in undesirable deformations, the formation of burr in many other methods is not avoidable. The convening procedures include:

Casting
Sintering
Forging
Scissors
tears
Turn
Drilling
Milling
Sawing
grinding
Welding

Deburring the company ENT-TEC GmbH

Burrs should not be considered a dimensional deviation but rather as an unwanted material surplus resulting from displacement. In some forming processes, material surplus is even desirable, as it facilitates handling in subsequent process steps.
The shape and height of the burrs depend above all on the material and the tool. For this reason, when machining the workpiece, care must be taken that the cutting gap is matched to material and material in such a way that the resulting burr is kept as small as possible. The sharpness of the tool also has an influence: blunt cutting and worn punching tools create more burrs and thus also cause greater material consumption.

Why is deburring important?

Deburring is particularly important in the metalworking industry for two reasons:

Avoiding injuries: Sharp cutting edges along the contour of workpieces pose a considerable risk of injury. Both in direct post-processing and in subsequent use, deep cutting wounds can be created which can be avoided by clean deburring.
Preparation of functionality: Grate can considerably limit the operability of the machine element. For example, the end product can have a poor thread run or fit inaccuracies by projecting material.

Deburring and rounding at SMT Schiebler Metalltechnik

What methods are there for deburring?

Depending on the size, material and surface quality requirements, various methods for deburring are used in the metal processing industry. Some important methods for deburring are briefly presented below:

Brush:
Technical brushes for deburring workpiece edges are often designed as round brushes with a fitting made of corrugated stainless steel wire. These are guided over the cutting edge in a rotating movement and thereby support the burr.
Filing:
The wedge is a manual deburring method in which a cutting tool made of tool steel is guided manually over the cutting edge. Feilings for deburring are available in many different forms.
Grinding:
The sliding grinding is also known as sliding chips or as Trowalizing. In this case, the workpiece to be deburred together with grinding bodies and an additive is introduced into a rotating or oscillating drum, whereby burr is removed due to the relative movement.
Thermal deburring:
During thermal deburring, a gas mixture is ignited in a so-called deburring chamber in order to remove thin, protruding burrs. The method has the advantage that even places which are difficult to access are achieved.
Electrochemical deburring:
The electrochemical deburring is also referred to as lysis and is particularly suitable for hard materials. Grat is removed completely without mechanical contact between the tool and the workpiece by generating a current flow via an external voltage source.

Trorolling - Sliding grinding at Rehm Blechtec Gmbh

In the plastics processing industry, parts which are produced by the injection molding process are deburred. Since plastic parts are significantly softer compared to metal parts, they can often be deburred in the warm state with special knives or even with hot air.

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Techpilot has registered many companies offering Deburring. Usually this is only one of many production steps and is therefore usually offered in connection with technologies such as casting, milling, or die-forging.

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Enquiry for deburring and trowaling

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Trowalizing

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