Polishing machine Q&A

Q. What is polishing machine ?
By using a belt transport system, abrasive material is conveyed into the centrifugal wheel system. Through the centrifugal force of the wheel, the abrasive material is shot at the workpiece's surface in a sliding way to achieve the polishing effect with millions of abrasive particles making contact with the workpiece surface.
1. The features of the JHT abrasive.
  • The abrasive are small in size, with particle diameters ranging from 0.2mm to 0.6mm, allowing for precise treatment of any gaps, grooves, or special workpieces.
  • The main component of the abrasive material is composed of elastic rubber, so there is no need to worry about affecting the dimensional accuracy of the workpiece during the polishing process.
  • This abrasive material can withstand high temperatures of up to 250°C and is not easily worn during the polishing process. A 3-kgs abrasive material can be used for approximately 1,000 hours.
  • This abrasive material is a dry abrasive, and after polishing, the workpiece can be simply blown with an air gun to clean the surface without the need for additional washing.
  • There are no pollution concerns, as the spent abrasive material is reduced to powder and is collected by the equipment's dust collector. It can be disposed of as dry waste, without any difficult waste material disposal issues.
  • The abrasive material is reusable and can be replenished as needed, eliminating the need to discard and replace the entire batch. This approach is both economical and efficient.
2. What are the components of the JHT polishing abrasive?

It is primarily composed of three components: elastic abrasives, diamond powder, and grinding fluid.

① The composition of elastic abrasives includes rubber. Its main function is to serve as a carrier for diamond powder.
② The primary function of diamond powder is grinding and polishing.

The primary method for distinguishing between coarse polishing and fine polishing of abrasives is mainly determined by the fineness of the added diamond powder.
In simple terms, if you add #10000 diamond powder to the same rubber particles, it is for fine polishing, whereas if you add #800 diamond powder, it's for coarse grinding.
It's important to note that using both fine and coarse diamond powders on the same batch of rubber particles can lead to a significant reduction in polishing effectiveness.
So, if you have both coarse and fine polishing requirements, it's advisable to prepare two separate batches of rubber particles. One batch should be for adding fine diamond powder, while the other batch should be for adding coarse diamond powder.
And each time you switch between coarse polishing and fine polishing abrasives, it's essential to completely remove the abrasives from the machine. Then, use compressed air to clean every nook and cranny in the machine's workspace, including any remnants of abrasives left behind in the machine's rear door.

③ The main function of the grinding fluid is to adhere the diamond powder to the surface of the elastic abrasive.
Only 10ml of grinding fluid is needed for each abrasive regeneration. Adding too much abrasive can lead to clumping and affect the performance.

3. The consumption of consumables and related situations.

① The consumption of elastic abrasives is mainly due to human use and natural wear. Overall, the consumption is very minimal.
The particle size of the abrasive is between 0.2 and 0.6mm. Only when it is worn down to below 0.1mm, it will be vacuumed away by the dust collector in the equipment. Therefore, natural wear and tear is very minimal.
The main source of loss is due to human factors, such as when the polished workpiece is not properly cleaned after polishing, during material unloading, or when changing materials, etc. These situations can easily result in abrasives being scattered outside the machine.

② Diamond powder should be added approximately once every 8 hours of operation. Before adding it, you should first remove the abrasive material and add around 5 grams of diamond powder.

③ The grinding fluid only needs to be added in an amount of 10ml for each abrasive recycling.

4. What is abrasive recycling?
Abrasive recycling which means the polishing ability of recycled abrasives. In daily use, abrasives will shed and wear out, including diamonds Therefore, it is necessary to add approximately 5 grams of diamond powder every 8 hours of operation to enhance the polishing capability of recycled abrasives.
5. How often should abrasives be replaced?

Under normal circumstances, each kilogram of rubber granules can be used for 300 to 400 hours.
When you clearly feel that the amount of sand is decreasing or when there are irregular fluctuations in sand output, it may be because the abrasives in the equipment have fallen below the minimum required amount for that equipment.
At this time, you only need to add as needed, there is no need to dump entire batch.

6. How much can the roughness be reduced by using a JHT polishing machine ?

It varies depending on the metal material. It primarily depends on the initial condition of the product, the material, and the pre-processing steps.
In general, if the initial surface roughness (Ra) is 1.0, it can be reduced to below 0.5 through polishing.
If the initial surface roughness (Ra) is 0.2, it can be reduced to below 0.1 through polishing.

7. Will it affect the polishing effect upon the polished burrs fell into the abrasive?

Yes, it will, so regular cleaning and maintenance are necessary.
The maintenance time depends on the customer's product situation.
For products with more burrs, it's best to perform regular cleaning and maintenance every week.
If the product has fewer burrs, maintenance once a month is sufficient.

8. Dose the polishing process effect the workpiece dimensions?

Yes , it will . But the actual impact is very small. When the initial Ra (roughness average) is 0.5 micrometers, after polishing, it becomes 0.2 micrometers, and the size impact is 0.3 micrometers.

9. Are there any workpieces that are not suitable for polishing?

As this machine equipment is for jet polishing, there needs to be space to expel the abrasive when it contacts the workpiece. In the case of blind holes, deep holes, or hole diameters less than 5mm, it is not suitable.

Shrink fit machine Q&A

Q: The features of GIS-6000A shrink fit machine.
By using an air-cooling system can dissipate heat from the machine, reducing the probability of overheating during operation and extending the machine's lifespan. The operation is user-friendly. Anyone can follow the instructions in the video or the instruction to make operation.
Q: The advantages of using cooling systems with shrink fit machine.
Accelerate the cooling of the tool holder, and speed up the tool changing process
Q: How often does the machine need maintenance for GIS-6000A shrink fit machine?
The two lifting guide pillars on the machine need to be regularly oiled. Regular maintenance keeps the machine in good working condition and also improve smooth movement.
Q: The warranty of shrink-fit machine?
We provide 1 year warranty.
Q: How to deal with shrink-fit machine when it out of work?
Error code appears on the LCD screen when machine is out of work . Please refer to the operation instructions on troubleshooting. If unable to troubleshoot, please contact with our sales team.
Q: The operation and setup steps of shrink-fit machine.

Step1: Connect the compressed air hose.

Step2: Turn on the main power switch.

Step 3: Set heating time, lift and drop height .

For more details , please refer to operation instructions .

Q: How to set up the heating time for shrink fit machine?
It’s depend on the conditions of the tool holder , the thickness of the blade to set up heating time for each . The recommend heating time is from 3~18 seconds . Operators need to set parameters and record setting up time based on the differences tool holders.
Q: How to shrink out cutter from the tool holder?
Insert the induction ring, then set up the heating time. Shrink out cutter when heating is completed.
Q: How to select tool holder adapter clamp?
Place tool holder adapter clamp according to the type of the cutter ,like BT40 or BT50 …etc.
Q: What’s the function of induction ring?
According to operate conditions, customers can choose use induction ring to concentrate heat to shorten the time for shrinking out cutter. Certainly , user may also don’t use induction ring if it is not necessary.
Q: How to select the type of shrink fit machine?
Choose the appropriate shrink fit machine model based on the diameter of the cutter hilt and the material (tool steel or stainless steel) of the tool holder.
Q: What’s the maximum lifting height of GIS-6000A shrink fit machine.
The limit of lifting height is within 300mm. Once you requested lifting height is over 300 mm, please contact with our team.