Press Brake

For sheet metal bending, the press brake is a necessary machine. We have NC type and CNC type press brakes. At the same time, we can customize the punches and dies according to your practical use in sheet metal fabrication.

Shearing Machine

For the straight cutting of steel plate, hydraulic shearing machine is a good choice. It not only has high cutting efficiency, but also requires less investment. We have both swing beam shears and guillotine shears for your selection.

Laser Cutting Machine

In the current metal plate and pipe cutting, laser cutting machine is undoubtedly the best choice. It can not only cut various shapes, but also has small cutting gap, high precision and high cutting efficiency. Today, it is very cost-effective.

13 Methods to Remove Metal Burrs (Deburring)

Burr is a metal part of the metal casting, milling or electroplating process, metal surface residual or extremely fine microscopic metal particles.

The appearance of burrs will greatly reduce the quality standard of metal workpieces, so it should be prevented or managed to remove burrs.

One of the hazards of burr is easy to cut!

In order to remove burrs, a secondary operation called deburring is usually required.

Three deburring and edge finishing of precision parts may account for 30% of the cost of finished parts.

In addition, the secondary finishing operation is difficult to automate, so burr has really become a thorny problem.

The easiest way for deburring including the following 10 listed methods:

1. Deburring manually

Deburring Manually

The operator USES a file, sandpaper and a first-class tool to polish the workpiece and removes the burr.

This method requires not very high for workers’ technical skills. It is suitable for products with small burrs and simple product structure.

Therefore, it is also widely used in general enterprises to remove burrs.

The file is divided into two types: artificial file and pneumatic file.

The cost of the manual file is more expensive, the deburring efficiency is not very high, and it is difficult to remove the complex cross hole.

Disadvantages: the labor cost is expensive, the efficiency is not very high, and it is difficult to remove complex cross holes.

Applicable object: aluminum alloy die castings with low technical requirements for workers and simple product structure.

2. Deburring with punch

Deburring with punch

The removal of burrs is carried out with the method of making punch mold worked on the punching machine.

The punching die needs a certain amount of rough and fine blanking die, and it may be necessary to make the sizing die.

Suitable for the simple product, the efficiency and effect of deburring are better than the manual method.

Disadvantages: it requires a certain production cost of die (coarse die and fine die), and it may also need to make shaping die.

Applicable object: suitable for aluminum alloy die castings with simple parting surface. The efficiency and deburring effect are better than manual.

3. Deburring by grinding

The method of removing burrs by vibration, sandblasting and roller, and is widely used by enterprises.

The problem with deburring by grinding is that sometimes the removal is not very clean and may require subsequent manual processing or other means of deburring.

This method is suitable for bulk small products.

Disadvantages: the removal is not very clean, and the residual burr may need to be treated manually or deburred in cooperation with other methods.

Applicable object: suitable for small aluminum alloy die castings with large batch.

4. Deburring by freezing

Deburring by freezing

This is a method to use the temperature drop to quickly embrittle the burrs and then spray the pellets to remove the burrs.

Frozen deburring is suitable for products with smaller burr wall thickness and the smaller workpiece.

The price of the whole equipment is a little high, around 30,000-40,000usd.

Applicable object: suitable for aluminum alloy die castings with small burr wall thickness and small volume.

5. Deburring by thermal explosion

The method is also called the thermal deburring, or explosion deburring.

This is to pass some of the gas into a furnace, and then through some medium and conditions, the gas will explode instantly, using the energy produced by the explosion to dissolve the burr.

The equipment required for this approach is expensive, usually over 150,000USD. And the requirements for operating technology are very high.

Removal of burrs is inefficient and can cause side effects such as rust and deformation.

Thermal explosion deburring mainly used in some high precision parts, such as automotive aerospace and other precision parts.

Disadvantages: expensive equipment (millions of prices), high technical requirements for operation, low efficiency and side effects (rust and deformation);

Applicable object: it is mainly used in some high-precision parts fields, such as precision parts such as automobile and aerospace.

6. Deburring by engraving machine

Deburring by engraving machine

Use an engraving machine to remove burrs from the workpiece.

The equipment is not very expensive and usually costs several thousands of dollars.

It is suitable for removing the burr with simple space structure and simple position.

Applicable object: suitable for simple spatial structure, simple and regular deburring position.

7. Chemical deburring

Chemical deburring

The method of chemical deburring is to use the electrochemical reaction principle to automatically and selectively remove the burrs from the parts made of metal materials.

It is suitable for internal burrs that are difficult to remove, especially for small burrs on products such as pump body and valve body.

Applicable object: it is suitable for internal burrs that are difficult to remove, and small burrs (thickness less than 7 wires) of pump body, valve body and other products.

8. Electrolytic deburring

Electrolytic deburring

The method of removing the burr of metal parts by electrolysis.

This method can have certain side effects, because the electrolyte is corrosive, and near the burr is also affected by electrolysis, the surface will lose luster, and even affect dimensional accuracy.

As a result, the workpiece should be cleaned and rusted after electrolysis deburring.

This method is suitable for removing the burr of the cross hole at the concealed part of the workpiece and the complex parts. The production efficiency is high, and the operation usually takes only a few seconds to tens of seconds.

It is applied to the hole mouth of the oil line of gear, connecting rod, valve body and crankshaft as well as sharp corners rounding.

Disadvantages: the electrolyte is corrosive to a certain extent, and the parts near the burr are also affected by electrolysis, which will lose the original luster on the surface and even affect the dimensional accuracy.

Aluminum alloy die castings should be cleaned and antirust treated after deburring.

Applicable object: suitable for deburring gear, connecting rod, valve body and crankshaft oil circuit orifice, as well as sharp corner rounding, etc.

9. High-pressure water jet deburring

High-pressure water jet deburring

This is the method of using the instantaneous impact of water to remove burrs and flying edges and can achieve the purpose of cleaning.

This equipment is very expensive, mainly used in the heart of the car and the hydraulic control system of engineering machinery.

Disadvantages: expensive equipment

Applicable object: it is mainly used for the hydraulic control system of automobile heart and engineering machinery.

10. Ultrasonic deburring

Ultrasonic deburring

Conventional vibration grinding is difficult to deal with the burr of holes.

The typical abrasive flow machining process (two-way flow) pushes the abrasive through two vertically opposite abrasive cylinders to make it flow back and forth in the channel formed by the workpiece and fixture.

Abrasive entering and flowing through any restricted area will produce grinding effect.

The extrusion pressure is controlled at 7-200bar (100-3000 psi), which is suitable for different strokes and different cycle times.

Applicable object: it can handle 0.35mm microporous burr without secondary burr, and the fluid characteristics can handle burr at complex positions.

11. Abrasive flow deburring

Conventional vibration grinding is difficult to deal with the burr of holes.

The typical abrasive flow machining process (two-way flow) pushes the abrasive through two vertically opposite abrasive cylinders to make it flow back and forth in the channel formed by the workpiece and fixture.

Abrasive entering and flowing through any restricted area will produce grinding effect.

The extrusion pressure is controlled at 7-200bar (100-3000 psi), which is suitable for different strokes and different cycle times.

Applicable object: it can handle 0.35mm microporous burr without secondary burr, and the fluid characteristics can handle burr at complex positions.

12. Magnetic deburring

Magnetic abrasive machining is that under the action of strong magnetic field, the magnetic abrasive filled in the magnetic field is arranged along the direction of the magnetic line of force, adsorbed on the magnetic pole to form an “abrasive brush”, and generates a certain pressure on the workpiece surface.

While the magnetic pole drives the “abrasive brush” to rotate, it maintains a certain gap to move along the workpiece surface, so as to realize the finishing of the workpiece surface.

Features: low cost, wide processing range and convenient operation.

Process elements: grindstone, magnetic field strength, workpiece speed, etc.

13. Robot grinding unit

The principle is similar to manual deburring, only turning the power into a robot.

With the support of programming technology and force control technology, flexible grinding (transformation of pressure and speed) is realized, and the advantages of robot deburring are highlighted.

Compared with artificial robots, robots have the following characteristics: improved efficiency, improved quality and high cost.

Burr in milling parts with special problems.

In milling parts, deburring is more complex and costly, because milling different positions of different sizes will form multiple burrs.

At this time, it is particularly important to select the correct process parameters to minimize the burr size.

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5 thoughts on “13 Methods to Remove Metal Burrs (Deburring)”

  1. We hand deburr our CPM10V punch and dies with brass. It mostly works but you can feel a microscopic remnant on the edge. The tools are interference fit so a burr can destroy the cutting edge if it is not managed. I am looking for a method to improve the process and eliminate some of the manual work.

    1. Try 3m 15micron micro polishing paper. It sticks to a palm sander and works not to affect the edge quality.

      1. I work with gang punch assemblies of 3mm punches with about a 3mm gap between. The process after grinding sharp is using brass rods to break the bur while looking through a microscope. It is tedious and not so effective. I have found damage caused by burr coming loose while the die is in operation. The palm sander is not the right tool for the space. I may give the polish paper a try as I can’t get even a small stone in many places.

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