Femtosecond test shows that burrs will inevitably appear during die casting due to pressure impact and insufficient clamping force. In recent years, with the continuous improvement of the quality requirements of die castings, the requirements for burrs have become more stringent, and the methods of deburring have emerged one after another.

This is a more traditional and widely used way in die casting plants, using files (including manual files and pneumatic files), sandpaper, belt sander and grinding head as auxiliary tools.

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, small burr and simple product structure.

2, mold deburring

Deburring is carried out by making a die with a punch.

Disadvantages: It requires a certain manufacturing cost of stamping dies (rough dies and fine dies), and plastic dies may also be needed.

Applicable object: Suitable for aluminum alloy die castings with simple parting surface, with higher efficiency and better deburring effect than manual operation.

3. Grinding and deburring

This deburring method includes vibration, sand blasting, rolling and so on, which is widely used in die casting plants at present.

Disadvantages: there is a problem that the removal is not very clean, and it may be necessary to manually handle the residual burr or cooperate with other methods to deburr.

Applicable object: suitable for large quantities of small aluminum alloy die castings.

4. Freezing and deburring

Burrs become brittle quickly by cooling, and then they are sprayed to remove them. The equipment price is about 200,000 to 300,000 yuan;

Usage: Suitable for aluminum alloy die casting with small burr wall thickness and small volume.

5, thermal explosion deburring

Also known as thermal deburring and explosive deburring. By introducing some reactive gases into the equipment furnace, and then under the action of some media and conditions, the gas explodes instantly, and the energy generated by the explosion is used to dissolve and remove burrs.

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

Application: Mainly used in some high-precision parts fields, such as automobiles, aerospace and other precision parts.

6, engraving machine deburring

The equipment price is not very expensive (tens of thousands).

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

7, chemical deburring

Based on the principle of electrochemical reaction, the parts made of metal materials are automatically and selectively deburred.

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

8, electrolytic deburring

An electrolytic machining method for removing aluminum alloy die-casting burr by electrolysis. Electrolytic deburring is suitable for deburring hidden parts of aluminum alloy die castings or parts with complex shapes, with high production efficiency, and the deburring time usually takes only a few seconds to dozens of seconds.

Disadvantages: The electrolyte is corrosive to some extent, and the part near the burr is also electrolyzed, so the surface will lose its original luster and even affect the dimensional accuracy. After deburring aluminum alloy die castings, they should be cleaned and rustproof.

Application: suitable for deburring and chamfering gears, connecting rods, valve bodies and crankshaft oil circuits.

9, high pressure water jet deburring

Using water as the medium, the burr and flash produced after machining are removed by its instantaneous impact force, and the purpose of cleaning is achieved at the same time.

Disadvantages: expensive equipment.

Uses: mainly used in the heart of automobile and hydraulic control system of construction machinery.

10, ultrasonic deburring

Ultrasonic waves generate instantaneous high pressure to remove burrs.

Applicable object: mainly aimed at some micro burrs. Generally, if you need to observe burrs with a microscope, you can remove them with ultrasonic waves.

1 1, abrasive flow deburring

It is difficult to deal with the burr of the hole by conventional vibration grinding. The typical abrasive flow machining technology (bidirectional flow) pushes the abrasive to flow back and forth in the channel formed by the workpiece and the fixture through two vertically opposite abrasive cylinders. Abrasive effect will occur when abrasive enters and flows through any confined area. The extrusion pressure is controlled at 7-200bar( 100-3000 psi), which is suitable for different strokes and different cycles.

Applicable object: it can handle 0.35mm micro-hole burr, without secondary burr, and the fluid characteristics can handle burrs in complex positions.

12, magnetic deburring

Magnetic abrasive machining is that under the action of a strong magnetic field, the magnetic abrasive filled in the magnetic field is arranged along the magnetic field lines and adsorbed on the magnetic poles to form a "grinding brush", which exerts certain pressure on the surface of the workpiece. The magnetic pole drives the "grinding brush" to rotate while keeping a certain gap to move along the surface of the workpiece, thus finishing the surface of the workpiece.

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

Technological factors: grindstone, magnetic field intensity, workpiece speed, etc.

13, robot grinding device

The principle is similar to manual deburring, except that the power becomes a robot. With the support of programming technology and force control technology, flexible grinding (pressure and speed conversion) is realized, and the robot deburring has outstanding advantages.

Compared with manual operation, robots are characterized by higher efficiency, higher product quality and higher cost.