Cemented carbide die is an alloy material made of hard compound of refractory metal and binding metal by means of powder metallurgy process. The hardness of cemented carbide is incredibly high, so pay attention into the method when polishing that cemented carbide die.
lThe polish belonging to the powder metallurgy mould
lThe polish on the tungsten carbide die and carbide punch dies
The polish on the powder metallurgy mould
There is still an array of polishing methods for powder snow metallurgy molds by regular operation. The main tools used are brush, report, scraper, etc. However, handbook operation has two problems, one is that the grade of polishing is difficult to overpower, judging by the surgery experience, the other is always that the production efficiency is not high, only one product can be processed at any given time, the labor intensity is definitely large, the production fee is high, it is difficult to achieve large-scale production.
In improvement to manual polishing, addititionally there is mechanical polishing, which is more convenient than manual polishing.
- Powder metallurgy die polishing by rolling mill
The revolving brush drives the workpiece to be able to rotate. During the running process, the brush loads the burrs on the workpiece and makes this burrs fall off, in an attempt to achieve the purpose of polishing the powder metallurgy mildew. Reasonable selection of remember to brush material and rotation speed along with other parameters, can be processed with different powder metallurgy stop functioning.
- Polish with concluding machine
Finishing machine is especially divided into vibration finishing machine, centrifugal light adornment machine, magnetic light furnishings machine, flow finishing equipment, roller light decoration device, which vibration finishing machines, roller light decoration machine has been widely used in natural powder metallurgy die polishing industry.
- Sand blasting polishing
Sand blasting should be to use compressed air since the power to form any high-speed jet beam, the high-speed jet into the powder metallurgy mold being treated, the use of abrasive affect the powder metallurgy mold surface and cutting motion, so that the surface of the carbide die to have a certain degree of hygiene and different roughness, to enhance the mechanical properties belonging to the carbide die surface.
FOUR. Heat polishing
The principle is that the powder metallurgy mould to get polished is placed within a sealed container with sufficient strength, and then fed into a certain proportion of pre-mixed combustible energy, which is ignited through the spark plug to produce an instant high temperature to remove the burrs on the carbide die surface. The polishing effect of the method is good, it is going to not affect the organization of parts, it is applicable to lots, but the cost is relatively high.
The polish from the tungsten carbide die plus carbide punch dies
- Chemical polishing
The convex part connected with tungsten carbide die and carbide hand techinque die in the chemical moderate can be dissolved ahead of obtain a smooth outside. Complex shapes can often be polished without complex tools, and many pieces can be polished simultaneously.
- Electrolytic polishing
Similar basic principle as chemical substance polishing, by the selective dissolution of the tungsten carbide die and carbide punch die surface in the small projections, smooth the surface. Compared with compound polishing, the cathode reaction is often eliminated and the effect is much better.
- Ultrasonic polishing
The carbide die is put in the abrasive suspension and put in the ultrasonic field mutually, and the abrasive is ground and polished on the surface of the carbide die by vibration of the ultrasonic wave. This method will not cause deformation belonging to the cemented carbide, but it truly is difficult to manufacture plus install tooling.
- Liquid polishing
Fluid polishing is driven by hydraulic stress, so that the the liquid medium carrying abrasive particles flows forward and backward across the surface belonging to the carbide die at broadband to achieve the intention of polishing.
- Magnetic farming and polishing
Magnetic abrasives are used to form abrasive brushes under the action of your magnetic field to slow the tungsten carbide stop functioning and carbide punch perish.
The mold determines the forming of a part. For the accuracy belonging to the part, the polishing of the carbide die is essential.
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