Besides milling processing the process of metal turning processing is also developed by many companies, operating to meet the needs of using products with high accuracy, durability and aesthetics. However, when turning metal, there are still many errors that occur. So if you are still wondering or have questions about common errors when turning metal and how to thoroughly fix them, please follow the following article of P69 Mechanical Factory to answer all your questions!
What is metal turning?
– To put it simply, metal turning is a form of cutting metal workpieces by the movements of the turning tool and the workpiece. Unlike milling, the cutting motion in turning is the circular motion of the workpiece (different from milling, which is the movement of the cutter). The workpiece movement combined with the vertical or horizontal tool translation will form the complete part.
– With many advantages that it brings and high applicability, so it is very popularly used in mechanical processing. Currently, turning must account for 25 to 30% of the work in mechanical processing workshops around the world.
Common mistakes when turning metal and how to fix them thoroughly
Here are the common errors and how to fix them that P69 Mechanical Factory would like to introduce to you. Let’s see together!
1. The surface has parts that are not cut
Of the common errors when turning metal, the surface with the uncut part is the most common type of error. This is the situation that occurs when the surface of the product has details that have not been cut. Leads to finished products that do not meet the standards and requirements for use.
1.1. Reason
The reasons for this situation are many. However, it can be summarized with the following main reasons:
– The workpiece is small, the residual amount when turning is not enough.
– Loose workpiece mount leads to inversion when in use.
– This error sometimes appears because the center drill is misaligned.
1.2. How to fix
For each cause, the error condition will be handled in different directions. The simplest way to fix the problem of product surface defects when cutting is:
– Change the workpiece as well as the price of the workpiece. Check and select the workpiece size carefully to suit the processing needs.
– Round the billet.
– Pay attention to install the workpiece holder carefully.
– Centering correctly.
2. Product diameter size is wrong
In CNC machining, with high precision parts, this error is considered quite serious. But this is an error that can be avoided or fixed, so you do not need to worry too much.
2.1. Reason
– Measuring the wrong size when cutting the product is the most common cause. It causes the official processing to deviate much from the manufacturer’s finished product requirements.
– Sometimes, this error also comes from the wrong adjustment of the horizontal sliding table swing. Or because the technician did not eliminate the looseness when adjusting the test cut size.
– Or the size of the diameter deviation can also occur due to the accuracy of the lathe and and the cutter tools are worn or the tool holder on the machine is not correct.
2.2. Remedies
– Measure and test products carefully is the best measure to help avoid these errors. Be sure to de-freeze when using the swings before starting. At the same time, determine the correct alignment lines of the product. This will help you to minimize the possible errors.
3. Conical parts – Common defect in turning
– This is a common mistake when turning metal leading to product failure. A very unfortunate type of failure that, if we know the cause, can be easily prevented.
3.1. Reason
– The lathe is worn out.
– Because the two center points do not coincide.
– Knife is worn due to insufficient heat
– Technicians do not completely eliminate the slip of the horizontal slide on the lathe.
– The tool holder on the machine is lower than the center of the machine or the tool of the lathe is not tight enough, not sturdy.
3.2. Remedies
The way to fix this error is very simple. It doesn’t have much to do with engineering, so you can easily do it with the help of technicians:
– Re-sharpen the knife to the correct angle to use.
– Adjusting the center of the turret. Clean the rear tailstock taper hole before installing the center stand.
– Better quality knife replacement.
– Pay attention to the looseness before taking the cutting depth by adjusting the reed press screw thread.
– Adjust the knife rack so that it is right in the center of the machine.
– Use strong force to tighten the knife.
– After adjusting, along with the skill of the workers, you will certainly no longer have the error of taper details. So you don’t need to worry too much.
4. Error in the size of the length of the part
This is a common error when turning the outer cylindrical step. Like the above errors, it has many different causes of failure, which are mainly caused by machines and people. In fact, we can determine the cause and fix these errors very easily.
4.1. Reason
– The workpiece holder is not stable.
– The position of the workpiece on the chuck is changed.
– Length dimensions in a series of workpieces are not equal.
– Stop the progress when convenient not timely.
4.2. Remedies
– Tighten the clamp.
– Check the position of the workpiece. Tighten the workpiece to prevent the workpiece from moving axially during turning.
– Use the center nose to manually adjust the size of the part.
– Stop movement automatically when the gauge is from 2mm – 3mm. Then continue to rotate the next step for the entire length of the part to be turned.
5. Product gloss is not reached
For the field of mechanical processing, ensuring the gloss of the product is also an important factor in assessing the quality of the processing. Therefore, this error is considered a rather serious error.
5.1. Reason
– The first cause is the wear of the lathe tool. Sometimes this is also caused by the sharpening of the knife not being suitable for the material being cut.
– Choose a large tool width or a jig that is too long.
– The cutting mode used in turning technology is not reasonable.
– The tool holder is not placed in the center of the lathe. The tool holder is higher or lower than the machine center.
– Due to lathe, turning tool or unstable part.
5.2. Repair guide
– Here are some simple methods to help you fix this error:
– Sharpen and perform a careful check of the blade quality of the knife.
– Choose a knife with a suitable small width or use a knife with a high hardness.
– Reduce the depth of cut, the amount of advance when performing the finishing process.
– Check the knife rack for the correct center. At the same time, check and correctly adjust the height to suit the body.
– Check if the lathe, tool or part is secure? solid or not.
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Some metal turning methods
– Metal cutting processing methods such as turning, milling, planing and slotting, drilling – reaming – reaming, sharpening, grinding, grinding, fine grinding, ultra-fine grinding, thread surface machining, key surface machining and key, tooth surface machining, profiled surface machining, numerical program control machine….
– Finishing method by plastic deformation: surface quality when finishing by plastic deformation, pressing rolling technology, vibrating press rolling technology, extrusion technology…
– Non-traditional machining methods: overview of non-traditional machining methods, mechanical processing methods, chemical machining methods, electrical processing, etc.
– Applications of CNC turning
– This type of processing is widely applied in the mechanical industry in general and the aerospace, automotive, marine, shipbuilding, medical, … in particular.
Prestigious metal turning address
P69 Mechanical Factory is proud to be the number 1 unit in the market providing mechanical processing products in general and metal turning in particular.
Here, we own a team of designers, technicians, experienced workers. Well trained with high skill.
The system of equipment, machinery and technology is invested in the most modern and advanced. Guaranteed 100% product quality, genuine products guaranteed.
Customers can directly inspect the product before importing it. Refund if found counterfeit goods.
Various models, designs and product categories to meet the diverse needs of customers. Professional shipping and installation support.
The most competitive quote in the market.
So what are you waiting for, hurry up and contact us for a consultation
Contact information P69 . Mechanical Factory
Address: Km 18, Thang Long Boulevard, Thach That Quoc Oai Industrial Park, Hanoi
Office: No. 06/165C, Xuan Thuy, Cau Giay, Hanoi
Phone: 09666 86 969
Hotline: 0989 188 982
Email: kd1@cokhip69.com.vn
Linkdin: https://www.linkedin.com/in/nhamaycokhip69/
Website: https://cokhip69.com.vn/
Youtube: https://www.youtube.com/channel/UCfvFIhhuJ4ANAO0glUPSTAg/ab
